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Automobile power battery self-heating method and system, automobile and storage medium

An automotive power battery and power battery technology, which is applied in electric vehicles, vehicle energy storage, secondary batteries, etc., can solve the problems of low heating power and long preheating time, so as to improve internal heat generation, improve heating efficiency, shorten the Effect of warm-up time

Active Publication Date: 2021-12-24
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a self-heating method, system, vehicle, and storage medium for an automobile power battery to solve the problems of low power battery heating and long warm-up time

Method used

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  • Automobile power battery self-heating method and system, automobile and storage medium
  • Automobile power battery self-heating method and system, automobile and storage medium
  • Automobile power battery self-heating method and system, automobile and storage medium

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In one embodiment, a method for self-heating an automobile power battery is provided. Optionally, the automobile power battery self-heating method can be applied in such as figure 1 in the car shown. figure 1 The car 9 connected to the external electrical device 3 through the charging port 4 is used as the carrier; the car includes a power battery 1, an on-board electrical device 2, a charging port 4, a converter 5, a motor controller 6, a ...

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Abstract

The invention discloses an automobile power battery self-heating method and system, an automobile and a storage medium. The method comprises the following steps: when a first real-time temperature is smaller than a first preset temperature threshold value, determining a target current ripple quantity corresponding to a power battery according to a battery heating demand and an average current of the power battery which are acquired in real time; determining an operation mode corresponding to each electric device according to the target current ripple quantity and device information of each electric device electrically connected with the power battery; and synchronously sending the synchronizing signal to each electric device of which the operation mode belongs to the preset mode, so as to control the electric device receiving the synchronizing signal to synchronously operate in the corresponding operation mode, so that the current ripple generated by the power battery reaches the target current ripple quantity, and the power battery is self-heated through the current ripple. The power battery is promoted to generate current ripples to increase the internal heating amount of the power battery, the preheating time of the power battery is shortened, and the heating efficiency of the power battery is improved.

Description

technical field [0001] The invention relates to the technical field of power batteries, in particular to a self-heating method and system for a power battery of an automobile, a vehicle and a storage medium. Background technique [0002] With the development of science and technology, new energy vehicles are gradually being widely used. As the core power source of new energy vehicles, power batteries are used in different environments, but in different environments, the performance of power batteries is easily affected by the ambient temperature. . For example, when the power battery is in a low temperature environment such as minus 20° C., the performance of the power battery will decrease to a greater extent than that at normal temperature. Therefore, before using the car, the power battery needs to be warmed up. [0003] At present, the electronically controlled three-phase bridge arm in the prior art generally adopts PWM (Pulse Width Modulation, pulse width modulation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/635H01M10/633H01M10/637B60L58/27
CPCH01M10/615H01M10/625H01M10/635H01M10/633H01M10/637B60L58/27B60L2240/545Y02E60/10Y02T10/70
Inventor 谢飞跃张宇昕黄日张达俭赵婷婷
Owner BYD CO LTD
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