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Power battery balancing control method, device and circuit

A power battery and equalization control technology, which is applied to charge equalization circuits, batteries, circuits, etc., can solve the problem of low power battery equalization efficiency

Active Publication Date: 2018-02-02
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a power battery equalization control method, device and circuit to at least solve the technical problem of relatively low power battery balance efficiency

Method used

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  • Power battery balancing control method, device and circuit
  • Power battery balancing control method, device and circuit
  • Power battery balancing control method, device and circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0020] According to an embodiment of the present invention, a method embodiment of a power battery balancing control method is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0021] figure 1 is a flowchart of a power battery balancing control method according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0022] Step S102 , detecting the power battery cells to be balanced that meet the preset equalization starting conditions, and starting the balancing of the power battery cells to be balanced.

[0023] Step S104 , in the process of equalizing the power battery unit to be balanced, it is judged whet...

Embodiment 2

[0063] According to an embodiment of the present invention, an embodiment of a power battery balancing control circuit is provided. The power battery balance control method in Embodiment 1 can be realized by the power battery balance control circuit in Embodiment 2.

[0064] Such as Figure 4 As shown, the power battery balance control circuit includes: a battery state monitoring circuit 40 , a balance circuit 42 , a timer 44 and a control unit 46 .

[0065] The battery state monitoring circuit 40 is connected with the power battery 100 for monitoring the state of charge value of each power battery unit in the power battery 100 .

[0066] The balancing circuit 42 is connected in series with each power battery unit, and is used to balance the power battery to be balanced in the power battery.

[0067] The timer 44 is used for timing.

[0068] The control unit 46 is connected with the battery state monitoring circuit, the balancing circuit, the timer and the power battery, an...

Embodiment 3

[0076] According to an embodiment of the present invention, an embodiment of a power battery balancing control device is provided. The power battery balancing control device can execute the power battery balancing control method of Embodiment 1, and the above method can also be executed by the device.

[0077] Such as Figure 5 As shown, the power battery balance control device includes: a detection unit 52 , a judgment unit 54 , a first control unit 56 and a second control unit 58 .

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Abstract

The invention discloses a power battery equalization control method, device and circuit. Among them, the method includes: detecting the power battery unit to be balanced that satisfies the preset equalization starting conditions, and starting the balance of the power battery unit to be balanced; in the process of balancing the power battery unit to be balanced, judging Whether the single cell satisfies the condition of stopping the balance; when it is judged that the power battery cell to be balanced meets the condition of stopping the balance, the balance of the power battery cell to be balanced is suspended, and when the power battery cell to be balanced meets the condition of continuing the balance, Continue to balance the power battery to be balanced; when it is judged that the power battery unit to be balanced does not meet the conditions for aborting the balance, continue to balance the power battery unit to be balanced until the time for balancing the power battery unit to be balanced meets the balance time calculation When the value is reached, the balance is terminated. The invention solves the technical problem that the balance efficiency of the power battery is relatively low.

Description

technical field [0001] The present invention relates to the field of batteries, in particular to a power battery balancing control method, device and circuit. Background technique [0002] In recent years, the large-scale popularization of new energy vehicles has become faster and faster. As the core component of new energy vehicles, the power battery system has a direct impact on the performance of the vehicle. The power battery system is composed of multiple power battery cells connected in series. Due to the limitation of process conditions and the differences in the characteristics of the battery itself, there may be differences in power or voltage between the battery cells. After multiple charge and discharge cycles, The difference in power and voltage between single batteries is getting bigger and bigger. As a result, the charge and discharge capacity of the power battery system is getting smaller and smaller, which directly affects the performance and life of the powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42
CPCH01M10/42H01M10/4207H01M2010/4271H02J7/0048H02J7/0014H01M10/482H01M2220/20H02J7/0069Y02E60/10H01M10/425
Inventor 向晋俞会根杨重科盛军
Owner BEIJING ELECTRIC VEHICLE
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