A battery pack management system
A battery pack management and battery pack technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as affecting long-term capacity, battery pack damage, and inability to generate early warning signals in time, so as to avoid damage and prolong use. effect of life
Active Publication Date: 2015-08-26
BYD SEMICON CO LTD
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Problems solved by technology
[0002] Charging a secondary rechargeable battery to its SOC of 100% or discharging to its SOC of 0% will affect its long-term capacity
However, this kind of battery pack management system cannot generate early warning signals in time when the data acquisition and equalization part of the circuit fails, resulting in damage to the battery pack
Method used
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Embodiment 2
[0046] The battery pack management system of Embodiment 2 is the same as Embodiment 1, and both have double warning and protection circuits. The difference is that the temperature acquisition module is added, and the double protection circuit collects and judges the temperature signal of each secondary rechargeable battery in the battery pack, and generates an early warning signal based on the temperature signal value of the secondary rechargeable battery to avoid Damage to the battery pack, thus effectively extending the service life of the battery pack.
[0047] Due to the difference in the manufacture of each secondary rechargeable battery in the battery pack, the capacity of each secondary rechargeable battery is slightly different. It is necessary to monitor the state of charge of each secondary rechargeable battery in real time and balance it to eliminate overcharge or overdischarge of the secondary rechargeable battery and prolong the service life of the battery pack. ...
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The invention provides a battery pack management system which belongs to the field of battery management. The battery pack management system comprises a data acquiring and processing module, a first high-voltage switching module, a protection circuit module and an upper computer module, wherein the first high-voltage switching module is connected with the protection circuit module, and the protection circuit module is connected with the upper computer module; and the data acquiring module is connected with a battery pack and the upper computer module, and the data acquiring module is also connected with the upper computer module. According to the battery pack management system, under the condition that the data acquiring and processing module is invalid, an alarm signal can be generated by the protection circuit module, and the battery pack is controlled to stop working by the upper computer module according to the alarm signal generated by the protection circuit module so as to avoid damaging the battery pack.
Description
technical field [0001] The invention belongs to the field of battery management, in particular to a battery pack management system. Background technique [0002] Charging a rechargeable battery to its SOC of 100% or discharging it to its SOC of 0% will affect its long-term capacity. [0003] In order to solve this technical problem, the charging or discharging of the existing battery packs has limitations. For example, the working capacity range of the secondary rechargeable battery is 30% to 70%, that is, the available capacity range of the secondary rechargeable battery is 40% of the total capacity of the battery. [0004] Secondary rechargeable batteries have relatively flat charge and discharge curves, such as figure 1 As shown, the curve segment is relatively flat between 30% and 70% of the working capacity range, and a voltage change of only a few millivolts will cause a large change in the charge amount. In order to fully utilize the available capacity range of eac...
Claims
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IPC IPC(8): H02J7/00H02H7/18
Inventor 潘金龙何志强杨云
Owner BYD SEMICON CO LTD