According to one or more embodiments, a system, spares cabinet, and method for maintaining a state of charge of spare batteries. The spare cabinet may include an enclosure, a plurality of batteries with given states of charge stored within the enclosure, a charger and a load to charge and discharge the batteries to a storage or transportation state of charge. The spares cabinet may also include a controller configured to maintain the plurality of batteries at the storage or transportation state of charge by causing the charger or load to charge or discharge batteries, and a multiplexor configured to electrically couple the batteries to the controller. The spares cabinet may further include a human-machine interface coupled to the controller that is configured to receive inputs to the system and to display a current state of charge for the batteries.
H01M 10/42 - Procédés ou dispositions pour assurer le fonctionnement ou l'entretien des éléments secondaires ou des demi-éléments secondaires
H01M 10/46 - Accumulateurs combinés par structure avec un appareil de charge
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H01M 50/244 - Boîtiers secondairesBâtisDispositifs de suspensionDispositifs de manutentionSupports caractérisés par leur procédé de montage
H01M 50/251 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports spécialement adaptés aux dispositifs fixes, p. ex. production d’énergie tampon ou production d’énergie de secours
G05B 11/42 - Commandes automatiques électriques avec les dispositions nécessaires pour obtenir des caractéristiques particulières, p. ex. proportionnelles, intégrales, différentielles pour obtenir une caractéristique à la fois proportionnelle et dépendante du temps, p. ex. P.I., P.I.D.
H02J 1/12 - Fonctionnement de générateurs à courant continu en parallèle avec des convertisseurs, p. ex. avec un redresseur à arc de mercure
H02M 7/04 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques
A DC Power Plant converts an alternating current power input to a DC voltage to supplied to a load may have an associated storage-battery module to provide continued power to the load when there is an interruption of the alternating current power input. When power is restored to the DC Power Plant, the battery module needs to be recharged to replace the energy depleted during the power interruption. The value of the recharging current is controlled such that the recommended recharging rate is not exceeded by comparing the measured recharging current with a predetermined set-point value and determine an error value which is modified by a first and a second shaping function to control the DC voltage output, where the selection between the first and the second shaping function is approximately at the state of recharging when the battery transitions to a charging state.
H02J 7/04 - Régulation du courant ou de la tension de charge
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
4.
BATTERY-STRING MIDPOINT VOLTAGE MEASUREMENT APPARATUS AND METHOD
A mid-string voltage sensor is disposed in proximity to a storage-battery string and determines an error signal between the expected mid-string voltage and the actual mid-string voltage to aid in detecting faults in one or more of the batteries of the string. Each sensor is connected to or close to the battery string terminals and to a terminal at the midpoint of the group of batteries connected in series. The arrangement suppresses errors due to common-impedance coupling, and the measured voltages are decoupled from the battery system, prior to determining the error. A fractional error voltage is derived using a logarithmic ratio amplifier so that the error signal determination is performed at the sensor, with the resultant error signal suitable for coupling to a battery health monitor.
G01R 19/10 - Mesure d'une somme, d'une différence, ou d'un rapport
G01R 31/36 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H01M 50/509 - Interconnecteurs pour connecter les bornes des batteries adjacentesInterconnecteurs pour connecter les cellules en dehors d'un boîtier de batterie caractérisées par le type de connexion, p. ex. connexions mixtes
H01M 50/569 - Détails de construction des connexions conductrices de courant pour détecter les conditions à l'intérieur des cellules ou des batteries, p. ex. détails des bornes de détection de tension
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
5.
Battery-string midpoint voltage measurement apparatus and method
A mid-string voltage sensor is disposed in proximity to a storage-battery string and determines an error signal between the expected mid-string voltage and the actual mid-string voltage to aid in detecting faults in one or more of the batteries of the string. Each sensor is connected to or close to the battery string terminals and to a terminal at the midpoint of the group of batteries connected in series. The arrangement suppresses errors due to common-impedance coupling, and the measured voltages are decoupled from the battery system, prior to determining the error. A fractional error voltage is derived using a logarithmic ratio amplifier so that the error signal determination is performed at the sensor, with the resultant error signal suitable for coupling to a battery health monitor.
G01R 31/389 - Mesure de l’impédance interne, de la conductance interne ou des variables similaires
G01R 31/396 - Acquisition ou traitement de données pour le test ou la surveillance d’éléments particuliers ou de groupes particuliers d’éléments dans une batterie
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
6.
Redundant bus circuit breaker adapter assembly and power distribution system
An apparatus, system and method of efficiently configuring a power distribution system includes the provision of a dual-bus power distribution assembly, each bus of which may be connected to power sources and where the circuit breakers are adapted such that power from either of the two buses can be routed to an electrical load to provide redundant or non-redundant power, as required. Each circuit breaker position is capable of being configured to connect between either of the two buses and an individual load equipment supply bus. The circuit breaker may be a plug-in type where one of the terminals is adapted by a part that may be installed in one of two orientations. In the first orientation a first bus is connected to the individual load equipment supply bus and in the second orientation the second bus is connected to the individual load equipment supply bus.
G06F 11/20 - Détection ou correction d'erreur dans une donnée par redondance dans le matériel en utilisant un masquage actif du défaut, p. ex. en déconnectant les éléments défaillants ou en insérant des éléments de rechange
G06F 1/18 - Installation ou distribution d'énergie
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
7.
REDUNDANT BUS CIRCUIT BREAKER ADAPTER ASSEMBLY AND POWER DISTRIBUTION SYSTEM
An apparatus, system and method of efficiently configuring a power distribution system includes the provision of a dual-bus power distribution assembly, each bus of which may be connected to power sources and where the circuit breakers are adapted such that power from either of the two buses can be routed to an electrical load to provide redundant or non-redundant power, as required. Each circuit breaker position is capable of being configured to connect between either of the two buses and an individual load equipment supply bus. The circuit breaker may be a plug-in type where one of the terminals is adapted by a part that may be installed in one of two orientations. In the first orientation a first bus is connected to the individual load equipment supply bus and in the second orientation the second bus is connected to the individual load equipment supply bus.
H02B 1/04 - Montage sur ces dispositifs d'interrupteurs ou d'autres dispositifs en général, l'interrupteur ou le dispositif étant muni ou non d'une enveloppe
H02B 1/20 - Schémas de barres omnibus ou d'autres fileries, p. ex. dans des armoires, dans les stations de commutation
8.
Maintenance bypass assembly for uninterruptable power supply
Where an Uninterruptable Power Supply (UPS) is used in a system to ensure highly reliable power supply to an electronic system, occasional maintenance or repair of the UPS or its storage batteries may be required. Effecting this servicing while ensuring that the utility power continues to be supplied to the load may involve a Maintenance Bypass Assembly (MBA) comprising a plurality of manually-operated circuit breakers. The possibility of an incorrect actuation of such circuit breakers is precluded by the coordination of a plurality of electromechanically actuated circuit breakers in communication with a controller that may store a table of permitted state transitions and sequences for safe operation. Such operation may be confirmed by one or more sensors monitored by the controller.
H02J 9/00 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
H02J 9/08 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique demandant le démarrage d'une machine motrice
An apparatus, system and method of controlling the supply of DC current from a power source to an electrical load provides for a protective circuit that senses the characteristics of the connected load prior to permitting the enablement of a switch connecting the supply and the load. A voltage arising from applying a constant current to the load during a time period is compared with a predetermined threshold determined by the intended capacity of the switch so that, when closed, the current through the switch is compatible with the switch. The protective circuit may be used in conjunction with semiconductor switches, electromechanical contactors or relays. A plurality of such devices may be incorporated in an enclosure and controlled by logic so as to manage the supply of power from a power source to a plurality of electrical loads having differing power requirements.
H02H 9/00 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion
H03K 17/687 - Commutation ou ouverture de porte électronique, c.-à-d. par d'autres moyens que la fermeture et l'ouverture de contacts caractérisée par l'utilisation de composants spécifiés par l'utilisation, comme éléments actifs, de dispositifs à semi-conducteurs les dispositifs étant des transistors à effet de champ
G05F 1/565 - Régulation de la tension ou de l'intensité là où la variable effectivement régulée par le dispositif de réglage final est du type continu utilisant des dispositifs à semi-conducteurs en série avec la charge comme dispositifs de réglage final sensible à une condition du système ou de sa charge en plus des moyens sensibles aux écarts de la sortie du système, p. ex. courant, tension, facteur de puissance
H03K 17/18 - Modifications pour indiquer l'état d'un commutateur
H02H 3/20 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un excès de tension
H03K 5/24 - Circuits présentant plusieurs entrées et une sortie pour comparer des impulsions ou des trains d'impulsions entre eux en ce qui concerne certaines caractéristiques du signal d'entrée, p. ex. la pente, l'intégrale la caractéristique étant l'amplitude
G01R 33/07 - Mesure de la direction ou de l'intensité de champs magnétiques ou de flux magnétiques en utilisant des dispositifs galvano-magnétiques des dispositifs à effet Hall
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
An apparatus, system and method of controlling the supply of DC current from a power source to an electrical load provides for a protective circuit that senses the characteristics of the connected load prior to permitting the enablement of a switch connecting the supply and the load. A voltage arising from applying a constant current to the load during a time period is compared with a predetermined threshold determined by the intended capacity of the switch so that, when closed, the current through the switch is compatible with the switch. The protective circuit may be used in conjunction with semiconductor switches, electromechanical contactors or relays. A plurality of such devices may be incorporated in an enclosure and controlled by logic so as to manage the supply of power from a power source to a plurality of electrical loads having differing powerrequirements.29Date Recue/Date Received 2020-10-06
H02H 11/00 - Circuits de protection de sécurité pour empêcher la commutation de mise en service dans le cas où une condition électrique de travail indésirable pourrait en résulter
H02J 1/00 - Circuits pour réseaux principaux ou de distribution, à courant continu
H02J 1/04 - Systèmes d'alimentation en courant constant
H03K 17/30 - Modifications pour fournir un seuil prédéterminé avant commutation
11.
MAINTENANCE BYPASS ASSEMBLY FOR UNINTERRUPTABLE POWER SUPPLY
Where an Uninterruptable Power Supply (UPS) is used in a system to ensure highly reliable power supply to an electronic system, occasional maintenance or repair of the UPS or its storage batteries may be required. Effecting this servicing while ensuring that the utility power continues to be supplied to the load may involve a Maintenance Bypass Assembly (MBA) comprising a plurality of manually-operated circuit breakers. The possibility of an incorrect actuation of such circuit breakers is precluded by the coordination of a plurality of electromechanically actuated circuit breakers in communication with a controller that may store a table of permitted state transitions and sequences for safe operation. Such operation may be confirmed by one or more sensors monitored by the controller.
H02J 9/00 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
12.
Maintenance bypass assembly for uninterruptable power supply
Where an Uninterruptable Power Supply (UPS) is used in a system to ensure highly reliable power supply to an electronic system, occasional maintenance or repair of the UPS or its storage batteries may be required. Effecting this servicing while ensuring that the utility power continues to be supplied to the load may involve a Maintenance Bypass Assembly (MBA) comprising a plurality of manually-operated circuit breakers. The possibility of an incorrect actuation of such circuit breakers is precluded by the coordination of a plurality of electromechanically actuated circuit breakers in communication with a controller that may store a table of permitted state transitions and sequences for safe operation. Such operation may be confirmed by one or more sensors monitored by the controller.
H02J 9/00 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
H02J 9/08 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique demandant le démarrage d'une machine motrice
09 - Appareils et instruments scientifiques et électriques
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
AC electrical equipment, namely, breaker distribution cabinets, outlet panels, power distribution panels, power distribution units, UPS maintenance bypass panels, UPS maintenance bypass cabinets, UPS maintenance bypass switches, and remote monitoring; DC electrical equipment, namely, battery chargers, power distribution units, power distribution panels, power integrated systems comprised of rectifiers, circuit breakers, fuses, controllers, batteries, battery disconnects and battery monitors, outdoor power systems comprised of rectifiers, circuit breakers, fuses, controllers, batteries, battery disconnects, battery monitors and network interfaces, telecom power and rectifiers; batteries; battery cabinets; battery chargers; battery disconnect switches; storage racks for batteries; landing cabinets for paralleling multiple power systems; battery monitors; electric remote monitors for monitoring UPS systems, DC power systems, DC distribution panels, AC distribution systems Electrical repairs, maintenance, and installation of AC and DC electrical equipment, battery systems, battery monitors and UPS system monitors Engineering services, namely, engineering for AC and DC electrical equipment, battery systems, battery monitors and UPS system monitors in the industrial, Data Centers, telecommunications and utility markets; remote monitoring of the functioning and use of electrical equipment, namely, AC and DC electrical equipment, battery systems, battery monitors and UPS systems
A system and method for monitoring the status of a system of battery strings is described. The battery string current is measured by a current sensor urged into contact with a metallic element in which the battery string current is flowing. The time history of the battery string current and voltage is interpreted to determine whether the battery string is discharging, charging or in a fully charged state. A moving average current in the charging state is used to establish a threshold for determining whether a thermal runaway condition exists. The moving average is maintained at the value that existed at a time when the battery string has been disconnected from the system current bus.
G01R 31/367 - Logiciels à cet effet, p. ex. pour le test des batteries en utilisant une modélisation ou des tables de correspondance
G01R 31/382 - Dispositions pour la surveillance de variables des batteries ou des accumulateurs, p. ex. état de charge
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
G01R 31/36 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge
A system and method for monitoring the status of a system of battery strings is described. The battery string current is measured by a current sensor urged into contact with a metallic element in which the battery string current is flowing. The time history of the battery string current and voltage is interpreted to determine whether the battery string is discharging, charging or in a fully charged state. A moving average current in the charging state is used to establish a threshold for determining whether a thermal runaway condition exists. The moving average is maintained at the value that existed at a time when the battery string has been disconnected from the system current bus.
Storage batteries connected in series in an uninterruptable or back-up power supply system may have voltage potential differences between exposed terminals or conductors that exceed safety limits. A demountable insulating shield having apertures may be positioned so that the series string may be broken into a plurality of series sub-strings having a lesser potential difference has a cover over the aperture through which the series string configuration may be connected and disconnected. The cover may be an insulating material removably fastened to the insulating shield or a sliding cover that is captivated to the insulating shield. When the series string has been divided in to the sub-strings, the insulating shield may be demounted from the structure housing the batteries so that the batteries or their connections may be serviced.
Storage batteries connected in series in an uninterruptible or back-up power supply system may have voltage potential differences between exposed terminals or conductors that exceed safety limits. A demountable insulating shield having apertures may be positioned so that the series string may be broken into a plurality of series sub-strings having a lesser potential difference has a cover over the aperture through which the series string configuration may be connected and disconnected. The cover may be an insulating material removably fastened to the insulating shield or a sliding cover that is captivated to the insulating shield. When the series string has been divided in to the sub-strings, the insulating shield may be demounted from the structure housing the batteries so that the batteries or their connections may be serviced.
Storage batteries connected in series in an uninterruptable or back-up power supply system may have voltage potential differences between exposed terminals or conductors that exceed safety limits. A demountable insulating shield having apertures may be positioned so that the series string may be broken into a plurality of series sub-strings having a lesser potential difference has a cover over the aperture through which the series string configuration may be connected and disconnected. The cover may be an insulating material removably fastened to the insulating shield or a sliding cover that is captivated to the insulating shield. When the series string has been divided in to the sub-strings, the insulating shield may be demounted from the structure housing the batteries so that the batteries or their connections may be serviced.
Storage batteries connected in series in an uninterruptable or back-up power supply system may have voltage potential differences between exposed terminals or conductors that exceed safety limits. A demountable insulating shield having apertures may be positioned so that the series string may be broken into a plurality of series sub-strings having a lesser potential difference has a cover over the aperture through which the series string configuration may be connected and disconnected. The cover may be an insulating material removably fastened to the insulating shield or a sliding cover that is captivated to the insulating shield. When the series string has been divided in to the sub-strings, the insulating shield may be demounted from the structure housing the batteries so that the batteries or their connections may be serviced.
An equipment cabinet having a corrugation in the side panels is disclosed. The panels are affixed to a base by bolting or welding so as to be disposed opposite each other. Holes are provided in opposing surfaces the so that cross members may be secured in a position between the opposing side panels of the cabinet to form a support structure for equipment, such as batteries. Equipment may also be attached using mounting brackets. An equipment retaining bracket includes a retaining cross member, an L-shaped bracket and a bolt to joint the retaining cross member and the L-shaped bracket so as to secure the battery in two dimensions. Retaining brackets may be provided at the front and the rear surfaces of the equipment and, in cooperation with the cross members, retain the equipment in the cabinet.
A system and method for monitoring the status of a system of battery strings is described. The system includes a current sensor for each of the battery strings, and a controller configured to compare the measured current with criteria to determine whether the battery is in a thermal runaway state. Prior to entering the thermal runaway state the battery current characteristics may indicate other less serious states. Warning messages are provided for selected events, and the battery string is disconnected from the remainder of the system when a thermal runaway state is encountered. The system may provide a local indication of status and may also interface with a communications network to provide for remote monitoring.
A system and method for monitoring the status of a system of battery strings is described. The system includes a current sensor for each of the battery strings, and a controller configured to compare the measured current with criteria to determine whether the battery is in a thermal runaway state. Prior to entering the thermal runaway state the battery current characteristics may indicate other less serious states. Warning messages are provided for selected events, and the battery string is disconnected from the remainder of the system when a thermal runaway state is encountered. The system may provide a local indication of status and may also interface with a communications network to provide for remote monitoring.
G01R 31/371 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge avec indication à distance, p. ex. sur des chargeurs séparés
G01R 31/379 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge spécialement adaptées à un type de batterie ou d’accumulateur pour des batteries au plomb
G01R 31/385 - Dispositions pour mesurer des variables des batteries ou des accumulateurs
G01R 31/396 - Acquisition ou traitement de données pour le test ou la surveillance d’éléments particuliers ou de groupes particuliers d’éléments dans une batterie
H02H 7/18 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour pilesCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour accumulateurs
A system and method for monitoring the status of a system of battery strings is described. The system includes a current sensor for each of the battery strings, and a controller configured to compute the average current from the measured currents. The state of the battery system is determined as being fully charged, discharging or charging, and the individual battery string currents are compared with the average measured current to determine if the currents are within a threshold value. An alarm indication is provided when one or more of the currents exceeds a threshold difference. The system may provide a local indication of status and may also interface with a communications network to provide for remote monitoring.
A system and method for monitoring the status of a system of battery strings is described. The system includes a current sensor for each of the battery strings, and a controller configured to compute the average current from the measured currents. The state of the battery system is determined as being fully charged, discharging or charging, and the individual battery string currents are compared with the average measured current to determine if the currents are within a threshold value. An alarm indication is provided when one or more of the currents exceeds a threshold difference. The system may provide a local indication of status and may also interface with a communications network to provide for remote monitoring.
G01R 31/371 - Dispositions pour le test, la mesure ou la surveillance de l’état électrique d’accumulateurs ou de batteries, p. ex. de la capacité ou de l’état de charge avec indication à distance, p. ex. sur des chargeurs séparés
G01R 31/396 - Acquisition ou traitement de données pour le test ou la surveillance d’éléments particuliers ou de groupes particuliers d’éléments dans une batterie
H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p. ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
An equipment cabinet having a corrugation in the side panels is disclosed. The panels are affixed to a base by bolting or welding so as to be disposed opposite each other. Holes are provided in opposing surfaces the so that cross members may be secured in a position between the opposing side panels of the cabinet to form a support structure for equipment, such as batteries. Equipment may also be attached using mounting brackets. An equipment retaining bracket includes a retaining cross member, an L-shaped bracket and a bolt to joint the retaining cross member and the L-shaped bracket so as to secure the battery in two dimensions. Retaining brackets may be provided at the front and the rear surfaces of the equipment and, in cooperation with the cross members, retain the equipment in the cabinet.
An apparatus and method of mounting storage batteries are presented in which batteries in multiple tiers may be easily accessed for installation and servicing. A battery cabinet or relay rack has provision for multiple tiers of batteries spaced so that batteries may be inserted in each tier. The batteries are supported by a tray or other structure so that they are positioned to permit top access to the battery terminals mounted on the front or front to surfaces of the battery. Tiers are positioned further from the front of the relay rack as the height of the tier increases.
A DC power supply system in which the resistance of a battery is measured. The voltage of the DC power supply is reduced such that the battery supplies some current to the load, and the voltage and current are measured. The voltage of the DC power supply is further reduced such that the battery supplies increased power to the load, and the voltage and current are measured. A resistance value is computed, and may be compared with various pre-established criteria. The battery resistance may also be measured by comparing the charging time of a known resistive-capacitive circuit with the charging time established at a prior measurement epoch.
