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Lithium battery heating device and heating method

A heating device, lithium battery technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of poor heating effect, large heat transfer process loss, low heat transfer efficiency of lithium batteries, etc.

Inactive Publication Date: 2021-01-05
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat transfer efficiency from the heating resistor to the lithium battery is low, and the heat transfer process loses a lot, so the heating effect is not good

Method used

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  • Lithium battery heating device and heating method
  • Lithium battery heating device and heating method
  • Lithium battery heating device and heating method

Examples

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Effect test

no. 1 example

[0048] see figure 1 , which is a schematic structural diagram of a lithium battery heating device provided in an embodiment of the present application.

[0049] Such as figure 1 As shown, the lithium battery heating device provided in the embodiment of the present application includes:

[0050] A battery management system 300 , a self-heating power converter 200 and a lithium battery 100 .

[0051] In the embodiment of the present application, the lithium battery 100 may refer to one lithium battery 100 , or may refer to a battery module including a plurality of lithium batteries 100 connected in series. As an example, the lithium battery 100 may include a lithium titanate battery 100 whose power is greatly affected by temperature, or other lithium batteries 100 whose power is greatly affected by temperature.

[0052] Both the lithium battery 100 and the self-heating power converter 200 are connected to the battery management system 300 , and the self-heating power converte...

no. 2 example

[0079] According to the device provided above, the embodiment of the present application also provides a lithium battery heating method.

[0080] see Figure 4 , which is a schematic flowchart of a method for heating a lithium battery provided in an embodiment of the present application.

[0081] Such as Figure 4 As shown, the lithium battery heating method provided by the embodiment of the present application includes: receiving the first signal sent by the battery management system 300, the first signal is a signal generated according to the temperature of the lithium battery; according to the first signal, forming an AC on the lithium battery Charge and discharge current to heat the lithium battery.

[0082] As a possible implementation manner, according to the first signal, an AC charging and discharging current is formed on the lithium battery to heat the lithium battery, including:

[0083] According to the first signal, an AC charging and discharging current is form...

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Abstract

The invention discloses a lithium battery heating device and a heating method. The device comprises a battery management system, a self-heating power converter and a lithium battery, wherein the lithium battery and the self-heating power converter are connected with the battery management system, and the self-heating power converter is in closed-loop connection with the lithium battery; the battery management system is used for detecting the temperature of the lithium battery, generating a first signal according to the detected temperature and sending the first signal to the self-heating powerconverter; and the self-heating power converter is used for forming alternating current charging and discharging current on the lithium battery according to the first signal so as to heat the lithiumbattery. Therefore, according to the method provided by the invention, the lithium battery is directly heated by using the heat effect when the alternating current charging and discharging current passes through the internal resistor of the lithium battery, and the problem of overlarge energy loss in the heat transfer process is solved, so that the heating efficiency of the lithium battery is improved.

Description

technical field [0001] The present application relates to the field of batteries, in particular to a lithium battery heating device and a heating method. Background technique [0002] With the gradual development of lithium battery application technology, because its energy density is higher than some other energy storage methods, lithium batteries have been widely used in electric rail transit, electric vehicles and aerospace fields. Lithium batteries have the advantages of high power density, good safety, and long life, but the output power of lithium batteries is easily limited by temperature. For example, the peak power of a lithium battery at -10 degrees Celsius attenuates to 60% of the peak power at room temperature, which makes it impossible for a lithium battery to start normally in a low temperature environment, and the battery needs to be heated to a certain temperature first. [0003] At present, the method for heating the battery is mainly to set a heating resis...

Claims

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Application Information

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IPC IPC(8): H01M10/615H01M10/635H01M10/637H01M10/48
CPCH01M10/486H01M10/615H01M10/635H01M10/637Y02E60/10
Inventor 刘铭李艳昆张永才田庆周卓敏
Owner CRRC QINGDAO SIFANG CO LTD
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