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A battery balancing method, a battery balancing controller and a battery pack

A technology of battery equalization and controller, which is applied in the direction of charge equalization circuit, secondary battery charging/discharging, battery circuit device, etc., and can solve the problem of long time consumption

Active Publication Date: 2018-03-13
HUATING HEFEI POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a battery equalization method, a battery equalization controller and a battery pack, which are used to solve the problem that the existing equalization technology first judges whether equalization is required, and then performs equalization, which takes a long time and can only be performed during charging. problem of balancing

Method used

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  • A battery balancing method, a battery balancing controller and a battery pack
  • A battery balancing method, a battery balancing controller and a battery pack
  • A battery balancing method, a battery balancing controller and a battery pack

Examples

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Embodiment 1

[0056]An embodiment of the present invention provides a battery balancing method. For a battery pack composed of multiple single cells connected in series or in parallel, due to differences in charge and discharge rates and battery capacities between individual cells, this will cause overcharge or overdischarge of some single cells, affecting the entire battery. The life of the battery pack, therefore, needs to be balanced for the above battery pack. In the embodiment of the present invention, the battery is balanced during the operation of the battery without additional battery equalization time, and the equalization can be performed not only in the charging phase, but also in the discharging phase.

[0057] The execution body of the battery balancing method provided by the embodiment of the present invention is a battery balancing controller. Programmable read-only memory) stores parameters such as the equalization time coefficient and cumulative running time of each single...

Embodiment 2

[0097] An embodiment of the present invention provides a battery balancing controller. Wherein, the battery balancing controller can be an MCU, and the battery balancing controller can read the parameters such as the balancing time coefficient and the cumulative running time of each single battery in the battery pack stored in the EEPROM, and control each single battery according to the above parameters. When the corresponding equalization circuit is turned on or off, each single battery in the battery pack is equalized. The battery balancing controller is used to execute the battery balancing method provided in Embodiment 1 above.

[0098] Such as figure 2 As shown, the battery balance controller provided by the embodiment of the present invention includes: an acquisition module 210 , a judgment module 220 , a first balance module 230 and a second balance module 240 .

[0099] An acquisition module 210, configured to acquire the equalization time coefficient of the single ...

Embodiment 3

[0121] An embodiment of the invention provides a battery pack. Such as image 3 As shown, the battery pack includes: a plurality of single cells 310, a plurality of balancing circuits 320, an EEPROM 330, and the battery balancing controller 340 provided in Embodiment 2 above;

[0122] The balancing circuit 320 corresponds to the single battery 310 one by one;

[0123] The balancing circuit 320 is respectively connected to its corresponding single battery 310, and the battery balancing controller 340 is connected to the aforementioned EEPROM 330 and multiple balancing circuits;

[0124] The EEPROM 330 is used to store the cumulative running time and equalization time coefficient of each single battery 310;

[0125] The battery balancing controller 340 is used to control the balancing circuit 320 to balance the corresponding single batteries 310 .

[0126] Wherein, the above-mentioned battery pack includes a plurality of single cells 310, and the plurality of single cells 310...

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Abstract

The invention provides a battery equalization method, a battery equalization controller and a battery pack. The method comprises: acquiring an equalization time coefficient of a battery cell of the battery pack; judging whether the equalization time coefficient of the battery cell is an effective value; if yes, acquiring accumulative running time of the above battery cell and equalizing the above battery cell according to the accumulative running time and the equalization time coefficient; if not, acquiring a coefficient of uniformity between the battery cells in the battery pack; and equalizing the above battery cell according to the coefficient of uniformity. In the battery running process, the battery is charged without additional battery equalization time, and equalization is available both in a charging phase and a discharging phase.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a battery balancing method, a battery balancing controller and a battery pack. Background technique [0002] At present, multiple single cells are often connected in series or in parallel to form a battery pack, which is used in new energy vehicles. Due to the inconsistency of the charging and discharging rates and battery capacities among the individual cells in the battery pack, some of the single cells are overcharged or over-discharged during the charging and discharging process, which affects the life of the entire battery pack. [0003] In the prior art, passive equalization methods are often used to balance batteries with poor consistency. Passive equalization technology is to dissipate excess power in a single battery into heat in the form of resistance, but the existing passive equalization technology can only It is carried out during charging, and it is necessary to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH01M10/441H02J7/0016Y02E60/10
Inventor 罗欢劳力王扬周鹏
Owner HUATING HEFEI POWER TECH
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