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Battery discharge control method and device

A battery discharge and control method technology, which is applied in the field of control, can solve the problems of affecting battery performance, battery overdischarge, and the battery cannot accurately reflect the real performance of the battery, so as to improve battery performance, prolong battery life, and reduce battery overdischarge. Effect

Active Publication Date: 2012-04-04
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, when controlling the discharge of the battery, due to factors such as the environment, the rated power of the battery cannot accurately reflect the current real performance of the battery. Relying on the rated power of the battery to control the discharge of the battery may cause battery overdischarge, which affects the battery. performance

Method used

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  • Battery discharge control method and device
  • Battery discharge control method and device
  • Battery discharge control method and device

Examples

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Effect test

Embodiment 1

[0025] An embodiment of the present invention provides a battery discharge control method, such as figure 1 shown, including:

[0026] 101. Obtain the current state parameters of the battery, and obtain the current state parameters of the motor.

[0027] 102. Determine the current maximum discharge power allowed by the battery according to the current state parameters of the battery and the current state parameters of the motor.

[0028] 103. Receive a discharge request, and control battery discharge according to the power of the discharge request and the current maximum discharge power allowed by the battery.

[0029] The battery discharge control method provided by the embodiment of the present invention accurately obtains the current performance state of the battery and the motor according to the battery state parameters and motor state parameters detected in real time, and when controlling the discharge of the battery, according to the current performance state of the bat...

Embodiment 2

[0031] Based on the battery discharge control method provided in Embodiment 1, the embodiment of the present invention provides a battery discharge control method, such as figure 2 shown, including:

[0032] 201. Obtain the current state parameter of the battery.

[0033] Specifically, when implementing the embodiment of the present invention, the current battery state parameter sent by the battery manager may be received, or the current state of the battery may be actively detected to obtain the current state parameter of the battery. Among them, the current state parameters of the battery include the current maximum discharge current I allowed by the battery limit , the battery's current minimum discharge voltage V limit , the current temperature of the battery t, the current minimum cell voltage V of the battery cell .

[0034] 202. Obtain a current state parameter of the motor.

[0035] Specifically, when implementing the embodiment of the present invention, the curr...

Embodiment 3

[0055] An embodiment of the present invention provides a battery discharge control device, which can be used in a power battery discharge control system of an electric vehicle, such as image 3 As shown, the device includes: an acquisition module 301 , a determination module 302 , and a control module 303 .

[0056] Wherein, the obtaining module 301 is used to obtain the current state parameters of the battery and obtain the current state parameters of the motor.

[0057] The determination module 302 is configured to determine the current maximum discharge power allowed by the battery according to the current state parameters of the battery and the current state parameters of the motor.

[0058] The control module 303 is configured to receive a discharge request, and control the discharge of the battery according to the power of the discharge request and the current maximum discharge power allowed by the battery.

[0059] Specifically, see Figure 4 , the obtaining module 30...

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Abstract

The invention discloses a battery discharge control method and device, which relates to the control field. The method comprises the following steps of: obtaining a current status parameter of a battery, and obtaining a current status parameter of a motor; determining maximal discharge power currently allowed by the battery according to the current status parameter of the battery and the current status parameter of the motor; and receiving a discharge request, and controlling the battery to discharge according to the power of the discharge request and the maximal discharge power currently allowed by the battery. The battery discharge method and device provided by the invention control the battery to discharge according to the power of the discharge request and the maximal discharge power currently allowed by the battery so as to reduce battery overdischarge phenomenon and enhance battery performance.

Description

technical field [0001] The invention relates to the field of control, in particular to a battery discharge control method and equipment. Background technique [0002] With the development of new energy technology, more and more people pay attention to electric vehicles. As the power source of electric vehicles, batteries are the core components of electric vehicles. In order to ensure the efficient work and durability of batteries, it is necessary to control and manage the discharge of batteries. . [0003] In the prior art, when controlling the discharge of the battery, the discharge of the battery is mostly controlled according to the power of the discharge request and the rated power of the battery, that is, when the power of the discharge request is greater than the rated power of the battery, the discharge of the battery is controlled according to the rated power of the battery ; When the power of the discharge request is not greater than the rated power of the battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 孔令静刘小飞林新峰
Owner CHERY AUTOMOBILE CO LTD
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