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battery management system

A battery management system and battery management unit technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as lack of active coordination ability, poor power balance effect, and inability to achieve battery pack power balance, etc., to achieve improved Power balance effect, high reliability, low cost effect

Active Publication Date: 2018-06-26
杭州华塑科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods can only adopt a master-slave system structure, collect data in a polling manner, and do not have active coordination capabilities
And the power balance effect is poor, only the power balance between battery cells can be achieved, and the power balance between battery packs cannot be realized

Method used

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Examples

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Embodiment Construction

[0019] refer to figure 1 , figure 1 It is a structural schematic diagram of the connection between the battery management system and the battery pack of the present invention. The battery management system is used for power balance of at least two groups of battery packs M, each battery pack M including at least two battery cells B. In this embodiment, the battery pack M preferably includes 12 battery cells B1-B12, and the battery cell B is preferably a storage battery. Of course, in other embodiments, the battery cell B can also be other rechargeable batteries. The battery management system includes at least two battery management units 11 and a central control unit 12 . Each battery management unit 11 corresponds to each battery pack M, and the battery management unit 11 is connected to the corresponding battery pack M, and the central control unit 12 is connected to each battery management unit 11 through a CAN bus 13 . Preferably, the central control unit 12 is connecte...

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Abstract

The invention discloses a battery management system, which is used for balancing electric quantity of at least two battery packs, wherein each battery pack comprises at least two single batteries. The battery management system comprises a central control unit and battery management units corresponding to each battery pack, wherein the central control unit and each battery management unit are connected through a CAN bus, the battery management units are used for carrying out battery electric quantity equalization for the single batteries of the corresponding battery pack, and the central control unit is used for carrying out electric quantity equalization between the battery packs. Through the mode disclosed by the invention, the battery management system can realize electric quantity equalization in each battery pack and can realize electric quantity equalization between the battery packs at the same time, thereby effectively improving the electric quantity equalization effect.

Description

technical field [0001] The invention relates to the field of battery management, in particular to a battery management system. Background technique [0002] In the existing technical field of batteries, a storage battery is widely used in various fields because it is a convenient, safe and reliable DC energy source. A battery can convert electrical energy into chemical energy and store it, and convert chemical energy into electrical energy when in use. However, since the storage battery is a chemical reaction device, it is generally difficult to detect the internal chemical reaction in time, and the defects in daily use often need long-term and frequent use to appear. Furthermore, the chemical characteristics of the battery determine that the range of its working voltage is strictly limited. When the working voltage of the battery is higher than the maximum voltage limit value, a safety accident will occur, and when the working voltage of the battery is lower than the minim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 石大明
Owner 杭州华塑科技股份有限公司
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