Balance control method for lithium battery management system
A management system and balanced control technology, applied in the field of lithium battery systems, can solve problems such as high cost, energy consumption, increased difficulty in mechanical design and battery system thermal management, etc.
Active Publication Date: 2013-01-23
CHONGQING CHANGAN AUTOMOBILE CO LTD +2
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[0008] Compared with the existing patents, the above-mentioned patents generally use the energy transfer method. The realization principle is that the management system monitors the voltage of each battery cell. If the voltage difference between the battery cells exceeds the allowable range, the management system controls the relay and controls the discharge. Resistors or capacitors are connected to the battery cells that need to be balanced, so as to realize the energy consumption or transfer of the battery cells, and achieve the purpose of battery cell equalization, but this method of battery cell equalization is costly and requires a certain amount of energy consumption , increasing the difficulty of mechanical design and thermal management of the battery system
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[0028] The control method includes: a signal acquisition module, a system operating condition judgment module, a balance judgment module, and a balance module.
[0029] Some modules of the balance control method of the lithium battery management system will be further described below in conjunction with the accompanying drawings.
[0030] figure 1 The overall design block diagram of the balance control method of the lithium battery management system, the signal acquisition module collects the real-time data of the battery cell voltage and the total voltage in the battery system, and judges whether there is cell overvoltage and the voltage between the battery cells according to the collected data information If the pressure difference is too large, it will enter different processing modules according to different working conditions.
[0031] figure 2 The flow chart of the information collection module of the balanced control method of the lithium battery management system co...
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The invention discloses a balance control method for a lithium battery management system. In the method, the consistency of batteries is achieved by a method of identifying and discharging overcharge (high-voltage) batteries by collecting the voltage of lithium battery monomers. In the method, the following modules are involved: a signal acquisition module, a system working condition judging module, a balance judging module and a balancing module. By precisely monitoring and controlling the state of lithium batteries, the method effectively controls the lithium batteries to keep consistent sothat a lithium battery system operates safely and reliably.
Description
[0001] A balance control method for a lithium battery management system technical field [0002] The invention belongs to the field of lithium battery systems of new energy vehicles, and in particular relates to a lithium battery equalization method. Background technique [0003] With the gradual deterioration of the global climate, the intensification of urban air pollution and the excessive consumption of oil resources, the development of energy-saving and environmentally friendly vehicles has become an important direction of technological innovation in the world's automotive industry and an inevitable choice for the sustainable development of the automotive industry. The development of new energy vehicles is gradually expanding. The types of power batteries currently used in new energy vehicles include: lead-acid batteries, nickel-metal hydride batteries, nickel-cadmium batteries and lithium batteries. Because of its small size, high energy density, long storage life, no ...
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IPC IPC(8): H02J7/00
Inventor 朴昌浩杨辉前赵立波王进付文利
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD