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Battery pack and control method thereof

A battery pack and control pair technology, applied in battery/fuel cell control devices, batteries, secondary batteries, etc., can solve problems such as increased risk of lithium conversion, slow charging of pure electric vehicles, and increased heat production of batteries

Active Publication Date: 2021-12-03
VOYAH AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Pure electric vehicles have the problem of slow charging. The main technical means to shorten the charging time is to increase the charging current of the battery, but the increase in the charging current is accompanied by problems such as increased heat production of the battery and increased risk of lithium loss.

Method used

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  • Battery pack and control method thereof
  • Battery pack and control method thereof
  • Battery pack and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] An embodiment of the present invention provides a battery pack, which is applied to a pure electric vehicle with a front motor and a rear motor. In a charging method, such as Figure 1a As shown, the battery pack includes: a power-type battery cell 101 and an energy-type battery cell 102, and the power-type battery cell 101 and the energy-type battery cell 102 are connected through a switch 103. When the battery pack is charged at the first speed, The control switch 103 is turned off to control the charging of the power type battery cell 101, and when the battery pack is charged at the second speed, the control switch 103 is turned on to control the simultaneous charging of the power type battery cell 101 and the energy type battery cell 102 , the first speed is greater than the second speed.

[0044]The output end of the power type cell 101 is connected to any one of the front motor and the rear motor, and the output end of the energy type cell 102 is connected to the r...

Embodiment 3

[0102] Based on the same inventive concept, the present invention also provides a control method for a battery pack, which is applied to a pure electric vehicle with a front motor and a rear motor. The battery pack includes: a power-type battery cell and an energy-type battery cell, And the power type battery cell and the energy type battery cell are connected through a switch, such as Figure 8a , Figure 8b , Figure 8c , Figure 8d As shown, the control method includes:

[0103] S801, when the battery pack is charged at the first speed, the control switch is turned off, so as to control the charging of the power battery;

[0104] S802, when charging the battery pack at a second speed, turn on the control switch to control simultaneous charging of the power type battery cell and the energy type battery cell, and the first speed is greater than the second speed;

[0105] S803, when discharging the battery pack, controlling the power type battery cell and the energy type b...

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Abstract

The invention relates to the technical field of vehicle control, in particular to a battery pack which comprises a power type battery cell, an energy type battery cell and a switch between the power type battery cell and the energy type battery cell, wherein the output end of the power type battery cell is connected with any one of a front motor and a rear motor, and the output end of the energy type battery cell is connected with the remaining motors, and the power type battery cell and the energy type battery cell respectively supply power to the front motor and the rear motor; or the output end of the power type battery cell is connected with the output end of the energy type battery cell to form a total output end, the total output end is divided into a first branch and a second branch, the first branch is connected with any one of the front motor and the rear motor, and the second branch is connected with the remaining motors; the first branch comprises the first internal resistance, the second branch comprises the second internal resistance, and when the ratio of the first internal resistance to the second internal resistance is adjusted to be the preset ratio, the total electric energy of the power type battery cell and the energy type battery cell is distributed to the front motor and the rear motor according to the preset proportion, so that the charging efficiency and the discharging rationality of the battery pack are improved.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a battery pack and a control method thereof. Background technique [0002] Pure electric vehicles have the problem of slow charging. The main technical means to shorten the charging time is to increase the charging current of the battery, but the increase in the charging current is accompanied by problems such as increased heat production of the battery and increased risk of lithium loss. [0003] There are multiple motors on the pure electric vehicle, how to control the discharge of the battery and how to reasonably distribute the power of the battery is also a technical problem to be solved urgently at present. Contents of the invention [0004] In view of the above problems, the present invention is proposed to provide a battery pack and a control method thereof that overcome the above problems or at least partly solve the above problems. [0005] In a first aspect,...

Claims

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Application Information

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IPC IPC(8): B60L58/10B60L50/64H01M10/44H02J7/00
CPCB60L58/10B60L50/64B60L50/66H01M10/441H02J7/00712H01M2220/20Y02E60/10Y02T10/70
Inventor 朱金鑫金兆鑫刘振勇黄敏
Owner VOYAH AUTOMOBILE TECH CO LTD