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Power storage device heating method for carrying out heating based on LC resonance

A technology of electric storage device and heating method, which is applied in the direction of circuits, electrical components, secondary batteries, etc., and can solve problems such as complex structure and impact on battery life

Active Publication Date: 2016-12-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit structure is complex, and the current waveform is non-standard sine wave, which will affect the battery life

Method used

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  • Power storage device heating method for carrying out heating based on LC resonance
  • Power storage device heating method for carrying out heating based on LC resonance
  • Power storage device heating method for carrying out heating based on LC resonance

Examples

Experimental program
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Effect test

Embodiment Construction

[0051] Such as figure 1 As shown, a power supply system for heating based on LC resonance includes a DC power supply 4, a half-bridge circuit 3, an LC resonance unit 2 and an electrical storage device 1, and a power electronic switch 5 is connected in parallel on both sides of the LC resonance unit 2; figure 2 As shown in (a), the half-bridge circuit 3 includes an upper bridge arm 301 and a lower bridge arm 302, the half-bridge circuit 2 can be an IGBT or a Mosfit, one end of the upper bridge arm 301 is connected to the positive pole of the DC power supply 4, and the lower bridge arm 302 One end is connected with the negative pole of the DC power supply 4 .

[0052] When the power supply system is heating and working, the power electronic switch 5 is disconnected.

[0053] The LC resonance unit 2 includes a capacitor 201 and an inductor 202, and the capacitor 201 and the inductor 202 are connected in series, such as figure 2 As shown in (a), one end of the inductor 202 is ...

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Abstract

The invention provides a power storage device heating method for carrying out heating based on LC resonance. According to the method, energy flows among a DC power supply, an LC resonance unit and a power storage device in a reciprocating manner, so that sinusoidal AC is generated; the sinusoidal AC generates heat through an AC impedance real part of the power storage device to achieve heating. Whether heating is carried out or not is judged through judging an SOC, terminal voltage and a temperature range of the power storage device. Fast and efficient heating is achieved from the inside of a battery and the usability of the battery in a low-temperature environment is ensured. A power supply system is taken as an object in the heating process, and the applied current is standard sinusoidal AC, so that improvement of the battery uniformity and prolonging of the service lifetime are facilitated.

Description

technical field [0001] The invention relates to a heating method for a power supply, in particular to a heating method for an electrical storage device based on LC resonance heating. Background technique [0002] With the gradual promotion of electric vehicles, the low-temperature performance of vehicle power batteries has attracted more and more attention. In an environment with low temperature in winter, the internal resistance of lithium-ion batteries rises sharply, the discharge capacity decreases significantly, and the high-current charging and discharging capabilities decrease, resulting in problems such as shortened driving range, poor power performance, and difficult charging of electric vehicles. , and most of the batteries cannot be charged when the temperature is lower than 0°C. If they are charged forcibly, it is easy to cause an internal short circuit and cause a safety hazard. In order to solve this problem, a more effective method is to heat the power battery...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/637H01M10/615H01M10/625
CPCH01M10/615H01M10/625H01M10/637Y02E60/10
Inventor 李军求孙逢春张承宁金鑫房林林
Owner BEIJING INSTITUTE OF TECHNOLOGYGY