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Battery charging system and charging control method and device

A battery charging and recharging battery technology, applied in battery circuit devices, secondary battery charging/discharging, circuit devices, etc., to achieve the effect of improving safety

Pending Publication Date: 2022-05-13
EVERGRANDE NEW ENERGY AUTOMOTIVE INVESTMENT HLDG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present application is to provide a battery charging system, charging control method, and device to solve the safety problems existing in the heating process of rechargeable batteries in low temperature environments

Method used

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  • Battery charging system and charging control method and device
  • Battery charging system and charging control method and device
  • Battery charging system and charging control method and device

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. The drawing numbers in this application are only used to distinguish each step in the solution, and are not used to limit the execution order of each step. The specific execution order is subject to the description in the specification.

[0025] In order to solve the problems existing in the prior art, the embodiment of the present application provides a battery charging system, including a power supply, a rechargeable battery, a heating unit, a switch group and a control uni...

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Abstract

The invention discloses a battery charging system and a charging control method and device, and the method comprises the steps: controlling a first switch, a second switch and a third switch to be closed through a control unit when the temperature of a rechargeable battery is lower than a preset temperature, so as to form a first path through which a power supply supplies power to a heating unit; based on a current current value in the process of heating the rechargeable battery by the heating unit in the first path, a first required current is sent to the power supply through the control unit, and the first required current is smaller than the current current value; the power supply provides a first demand current for the heating unit through the first path; the rechargeable battery provides a discharge current to the heating unit via the second path based on the first demand current and the current value. According to the scheme of the embodiment of the invention, the risk of lithium precipitation during heating of the rechargeable battery in a low-temperature environment can be avoided, and the safety of battery charging is improved.

Description

technical field [0001] The present application relates to the field of battery technology, and in particular to a battery charging system and a charging control method and device. Background technique [0002] Due to the characteristics of lithium batteries, when charging in a low temperature environment, the current will cause lithium deposition inside the lithium battery, resulting in an internal short circuit of the battery and the risk of fire. Therefore, in a low temperature environment, the battery management system (Battery Management System, BMS) will limit the size of the charging current to prevent the current from being too large. If the temperature is lower, the allowable charging current will be smaller or charging is strictly prohibited, which will lead to long charging time or failure to charge. [0003] In this regard, it has been proposed to introduce a heating circuit on the charging circuit to supply heat to the lithium battery, so that the temperature of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/615H02J7/00
CPCH01M10/443H01M10/615H02J7/0025H02J7/0013H02J7/0029
Inventor 曾俊先
Owner EVERGRANDE NEW ENERGY AUTOMOTIVE INVESTMENT HLDG GRP CO LTD
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