A power battery low temperature protection system and protection method thereof

A power battery, low temperature protection technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of long charging time and insufficient output power, and achieve the effect of shortening charging time, improving power output capacity, and saving power

Active Publication Date: 2020-12-15
GUANGZHOU XIAOPENG MOTORS TECH CO LTD +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of long charging time and insufficient output power of the automotive power battery management system in the prior art when working in a low temperature environment, this application provides the following technical solutions:

Method used

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  • A power battery low temperature protection system and protection method thereof
  • A power battery low temperature protection system and protection method thereof
  • A power battery low temperature protection system and protection method thereof

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Embodiment 2

[0047] This embodiment provides a low temperature protection method for a power battery system, wherein the system includes a temperature monitoring circuit and a heating module, such as Figure 4 , the method includes:

[0048] Step 201: Monitor the wake-up signal output by the temperature monitoring circuit 101, and send a heating instruction to the heating module 103 to control the heating module 103 to heat after the wake-up signal is obtained;

[0049] Step 202: After receiving the wake-up signal, send a sleep or disconnection command to the temperature monitoring circuit 101, and control the temperature monitoring circuit 101 to enter a sleep or disconnection state.

[0050] Through the method provided in this embodiment, when the ambient temperature of the battery is lower than the first threshold, the wake-up signal sent by the temperature monitoring circuit 101 will be received, and after the wake-up signal is obtained, a heating command will be sent to the heating mo...

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Abstract

The invention relates to the technical field of automobile batteries, in particular to a power battery low temperature protection system and a protection method thereof, wherein the system includes a temperature monitoring circuit, a control module and a heating module, and the temperature monitoring circuit is used to monitor the ambient temperature of the power battery When it is lower than the first threshold, it is turned on and sends a wake-up signal to the control module; the control module is used to send a heating instruction to the heating module when receiving the wake-up signal; the heating module is used to heat the power battery according to the heating instruction sent by the control module. Through the system and method of this application, the battery temperature can be automatically monitored, and the heating module can heat the power battery from time to time, so that the battery temperature is always in a suitable working range in a low temperature environment, and can be directly charged and discharged, shortening the battery life. At the same time, when the user needs to use the car, the power battery can be discharged directly, which improves the power output capacity of the battery.

Description

technical field [0001] The invention relates to the technical field of automobile batteries, in particular to a power battery low temperature protection system and a protection method thereof. Background technique [0002] As the energy source of electric vehicles, power batteries play a vital role. Most electric vehicles on the market today use lithium batteries as part of the power battery unit. However, at low temperatures, the capacity of lithium batteries will be significantly reduced, which will seriously affect their charging and discharging capabilities and efficiency. Therefore, proper thermal management of the power battery in electric vehicles has always been the top priority of the functional requirements of the vehicle. [0003] In today's solutions, for the thermal management of the power battery, the processing method is mainly to use the battery cell temperature and the water temperature of the battery thermal management circuit as the input signal after th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/635H01M10/637H01M10/6571H01M10/633
CPCY02E60/10
Inventor 刘隆
Owner GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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