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A method for rapid heating of lithium batteries

A lithium battery, fast technology, applied in the field of electric vehicle batteries and electric vehicle power batteries, can solve the problems of large heating efficiency and thermal resistance, affecting the space of battery packs, reducing and other problems, achieving strong practicability, high efficiency, energy saving and low cost. high sex effect

Inactive Publication Date: 2019-08-30
国安新能源(荆门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Without exception, the above heating methods all require the installation of complex heating body structures. While affecting the space of battery packs, the heating efficiency is also reduced due to large thermal resistance. Therefore, a heating device that does not need to be installed is required. A rapid heating method that can efficiently heat the battery

Method used

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  • A method for rapid heating of lithium batteries

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Effect test

Embodiment 1

[0043] Embodiment 1 of the present invention provides a method for rapidly heating a lithium battery, comprising: adding a method such as figure 1 The circuit shown to measure the AC internal resistance and heating function of a battery. First measure the AC internal resistance of the battery, and then calculate and give the heating power and heating power required by the battery through the lower computer. When the BMS detects that the battery temperature reaches the set low-temperature heating threshold, the heating switch S1 is turned on, and the power is turned on. The battery pack is heated, and when the battery temperature reaches the set heating shutdown threshold, S1 is disconnected and the heating is turned off.

[0044] like figure 1 The specific steps are as follows: V1 in the circuit diagram is the AC voltage of the set frequency, C1 and C2 are DC blocking capacitors, I1 is the constant current power supply, S1 is the heating control switch, and RX is the internal...

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Abstract

The invention relates to a novel rapid heating method for lithium batteries. The novel rapid heating method comprises the following specific steps: (1) adding a group of heating circuits to a battery management system of an electric car; (2) obtaining a voltage of a circuit key point of a battery management system and a temperature of a lithium battery pack by the heating circuits; (3) calculating alternating current internal resistance of the batteries and heating power of the lithium batteries by a formula; and (4) heating the lithium batteries when the temperatures of the lithium batteries are over-low. The rapid heating method provided by the invention has the advantages of being simple, convenient, high in practicability, efficient and energy-saving; and the condition that the electric car heats the power battery pack in a low-temperature environment can be ensured, so that discharge temperature ranges of the lithium batteries are reached; normal working of the electric car in the low-temperature environment is ensured; and the design function and performance are achieved.

Description

technical field [0001] The invention relates to the field of electric vehicle power batteries, in particular to the technical field of electric vehicle batteries, and in particular to a method for rapidly heating a lithium battery. Background technique [0002] Lithium batteries have the characteristics of high energy, long service life, high rated voltage, high power tolerance, strong adaptability to high and low temperatures, and environmental protection. They are widely used in communications, electric vehicles and other industries. [0003] Lithium batteries used in electric vehicles need to adapt to the extreme temperature working environment of the vehicle. As the main energy storage element of electric vehicles, the battery pack is one of the key components of electric vehicles. , the battery pack directly affects the performance of the electric vehicle, in this case, the battery pack needs to be heated. [0004] At present, the methods of heating the battery pack in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/052
CPCH01M10/052Y02E60/10
Inventor 朱兴国邓俊
Owner 国安新能源(荆门)有限公司
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