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Discharge control method and device for lithium battery at low temperature

A discharge control and lithium battery technology, which is applied in secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc. It can solve problems such as poor discharge performance, output voltage drop, and difficulty in meeting power supply requirements. Achieve the effect of improving applicability and enhancing discharge performance

Active Publication Date: 2021-08-10
ZHANGZHOU KEHUA ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The characteristics of the existing lithium battery itself determine its poor discharge performance at low temperatures. Studies have found that if the lithium battery is controlled to supply the working current at a low temperature (such as minus 20 degrees Celsius), the output voltage of the lithium battery will rapidly decrease. The damage of the lithium battery caused by the drop, which makes it difficult for the existing lithium battery to meet the needs of users in low temperature environments to use lithium batteries for power supply

Method used

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  • Discharge control method and device for lithium battery at low temperature
  • Discharge control method and device for lithium battery at low temperature
  • Discharge control method and device for lithium battery at low temperature

Examples

Experimental program
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Effect test

Embodiment 1

[0061] The application provides a method for controlling the discharge of lithium batteries at low temperatures, such as figure 1 shown, including:

[0062] Step 101, receiving a lithium battery discharge command;

[0063] In the embodiment of the present application, before receiving the lithium battery discharge command, two ends of the lithium battery may be connected to both ends of the load to form a loop and wait for receiving the lithium battery discharge command.

[0064] Optionally, the above-mentioned lithium battery is provided with a wireless receiving module.

[0065] Specifically, the above-mentioned lithium battery can receive the above-mentioned lithium battery discharge command by controlling the above-mentioned wireless receiving module.

[0066] Step 102, detecting the real-time temperature of the above-mentioned lithium battery in response to the above-mentioned lithium battery discharge command;

[0067] In the embodiment of the present application, aft...

Embodiment 2

[0118] The present application also provides a discharge control device for a lithium battery at low temperature, which corresponds to the discharge control method described in Embodiment 1 above. Figure 5 A discharge control device provided by Embodiment 2 of the present application is shown, and for convenience of description, only parts related to this embodiment are shown. Unless this embodiment clearly specifies otherwise, the parts not explicitly described in this embodiment correspond to the discharge control method in the first embodiment.

[0119] In the embodiment of this application, such as Figure 5 As shown, the discharge control device 50 includes: a processing unit 501, a receiving unit 502, and a first detection unit 503;

[0120] The receiving unit 502 is used for: receiving a lithium battery discharge instruction;

[0121] The first detection unit 503 is configured to: detect the real-time temperature of the lithium battery in response to the lithium batt...

Embodiment 3

[0144] The application also provides a lithium battery, such as Image 6 As shown, the lithium battery in the embodiment of the present application includes: a memory 601 and a processor 602, wherein: the memory 601 is used to store software programs and modules, and the processor 602 runs the software programs and modules stored in the memory 601 to execute various functional applications and data processing. The memory 601 and the processor 602 are connected through a bus 603 .

[0145] Specifically, the processor 602 implements the following steps by running the above computer program stored in the memory 601:

[0146] Receive lithium battery discharge command;

[0147] Detecting the real-time temperature of the lithium battery in response to the lithium battery discharge command;

[0148] If the above-mentioned real-time temperature is less than the preset low-temperature threshold, control the above-mentioned lithium battery to enter a low-temperature discharge mode; ...

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PUM

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Abstract

The application discloses a discharge control method and device for a lithium battery at low temperature, and relates to the technical field of battery application. The above discharge control method and device adopts a method of controlling the lithium battery to discharge at a preset preheating discharge current at low temperature to preheat the lithium battery, and then controlling the lithium battery to discharge at a preset working current, wherein the preheating discharge The current is less than the working current, which avoids the rapid drop of the output voltage of the lithium battery when the lithium battery is discharged directly at the preset working current at low temperature, and eventually leads to the damage of the lithium battery, which improves the applicability of the lithium battery , which enhances the discharge performance of lithium batteries in low temperature environments.

Description

technical field [0001] The present application relates to the technical field of battery application, and in particular to a discharge control method and device for a lithium battery at low temperature. Background technique [0002] With the development of society, the application of lithium batteries is becoming more and more extensive. The main reasons are: high energy density, long service life, high power capacity, and environmental protection. Among them, high energy density and high power capacity are the most important reasons why it is adopted by many electronic products and electric vehicles. [0003] The characteristics of the existing lithium battery itself determine its poor discharge performance at low temperatures. Studies have found that if the lithium battery is controlled to supply the working current at a low temperature (such as minus 20 degrees Celsius), the output voltage of the lithium battery will rapidly decrease. The drop causes damage to the lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/637H01M10/44
CPCH01M10/443H01M10/615H01M10/625H01M10/637Y02E60/10
Inventor 牛兴卓王志东杨燕芬
Owner ZHANGZHOU KEHUA ELECTRIC TECH CO LTD