摘要:
A system for determining a battery condition is provided. The system comprises temperature sensing means configured to provide a temperature value associated with the battery, impedance measuring means configured to provide impedance information associated with the battery, and a controller. The controller is configured to determine a threshold impedance associated with a separator membrane of the battery based on an initial impedance of the separator membrane as measured by the impedance measuring means and a battery temperature as measured by the temperature sensing means, monitor, during operation of the battery, an actual impedance associated with the separator membrane of the battery based on the impedance information and the battery temperature, permit current flow to and from the battery when actual impedance is greater than the threshold impedance, and prevent current flow to and from the battery when the actual impedance is less than or equal to the threshold impedance.
摘要:
Systems and methods for determining self discharge currents in an energy storage cell and detecting internal shorts are disclosed. A system includes a DC voltage source configured to provide a constant test voltage selected to be less than an open circuit voltage of an energy storage cell to the energy storage cell. The system also includes a current measuring device operably coupled between the DC voltage source and the energy storage cell, and control circuitry operably coupled to the current measuring device. A method includes applying the constant test voltage, and measuring the test current flowing between the DC voltage source and the energy storage cell until after the test current switches from a negative current to a positive current. The method also includes determining a self discharge current of the energy storage cell by analyzing the measured test current with computational models that capture physical processes tied to the test methods.
摘要:
One embodiment of the present disclosure describes a battery control system including a first string control unit that controls operation of a first battery string and outputs a first serial communication signal, in which the first serial communication signal comprises a first frequency to indicate that the first string control unit is a master string control unit when a fault is not detected; and a second string control unit that controls operation of a second battery string; receives the first serial communication signal; determines that the second string control unit is a subordinate string control, unit when the first serial communication signal comprises the first frequency; and outputs a second serial communication signal, in which the second serial communication signal comprises a second frequency to indicate that the second string control unit is the first subordinate string control unit when a fault is not detected.
摘要:
One embodiment of the present disclosure describes a battery system that includes a battery string with a first and second battery module connected in series; and a battery control system that includes a cell control unit electrically coupled to the first battery module, in which the first cell control unit determines first module level operational parameters related to operation of the first battery module; an integrated string control unit electrically coupled to the second battery module, in which the integrated string control unit determines second module level operational parameters related to operation of the second battery module; determines string level operational parameters related to operation of the battery string based at least in part on the first module level operational parameters and the second module level operational parameters; and controls operation of the battery string based at least in part on the string level operational parameters.
摘要:
A system and method for monitoring characteristics of an electric energy device includes generating an external short from the electric energy device. The external short occurs at a known distance from a sensor and has at least one known external resistance. The received signal representing change in electromagnetic field due to the applied external short may be analyzed to determine a signal parameter that is then analyzed in comparison to a lookup table, based on the known conditions including distance, temperature and the external resistance. The output of this analyses in comparison with expected values may be utilized to identify a characteristic of the energy device.
摘要:
A system for monitoring a plurality of cells in at least one battery, the system comprising: means for obtaining a plurality of measurements of a parameter at a plurality of times tl to tn for each of a plurality of cells in a battery; means for ranking the plurality of cells in dependence upon the plurality of measurements of the parameter taken at each of the times tl to tn to obtain a ranking value for each of the cells at the times tl to tn; and means for causing storage of the plurality of ranking values.
摘要:
본 발명은 전지팩의 기능을 검사하는 장치로서, (a) 전지팩이 탑재되어 있는 캐리어 지그를 컨베이어로부터 리프팅하여 하기 테스트부로 이송하는 로딩부(loading part); (b) 상기 로딩부로부터 이송된 캐리어 지그의 전지팩의 기능 검사를 수행하는 테스트부(testing part); 및 (c) 상기 테스트부에서 양품으로 판정된 전지팩을 캐리어 지그에 탑재된 상태로 컨베이어 상으로 이송하고, 불량으로 판정된 전지팩을 불량 배출부로 이송하는 언로딩부(unloading part);를 포함하고 있는 것을 특징으로 하는 전지팩 기능 검사장치를 제공한다.
摘要:
The present application discloses an integrated direct current (DC) subsystem monitoring system for monitoring and reporting status of a utility substation, the DC subsystem monitoring system having the ability to actively monitor and report on changes in the float current and current capacity of the system, as well as to monitor for ground faults.