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LC resonance and PTC (positive temperature coefficient) resistance band-based electric power storage device heating method

A technology of electric storage devices and resistance bands, which is applied in battery/fuel cell control devices, transportation and packaging, battery/battery traction, etc., and can solve problems such as complex circuit structure and impact on battery life

Active Publication Date: 2016-10-12
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 complicated, and the current waveform is non-standard sine wave, which has an impact on battery life

Method used

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  • LC resonance and PTC (positive temperature coefficient) resistance band-based electric power storage device heating method
  • LC resonance and PTC (positive temperature coefficient) resistance band-based electric power storage device heating method
  • LC resonance and PTC (positive temperature coefficient) resistance band-based electric power storage device heating method

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Experimental program
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Embodiment Construction

[0067] Such as figure 1 As shown, the power supply system for heating based on LC resonance and PTC resistance band of the present invention consists of a DC power supply 4, a heating control system 6, a power electronic switch 5, a half bridge 3, an LC resonance unit 2, an electrical storage device 1, and a PTC resistance The belt 7 is composed; the DC power supply 4 is connected to the half bridge 3; the heating control system 6 obtains the status information of the power storage device 1, controls the power electronic switch 5 to be on and off, adjusts the resistance value of the PTC resistance belt 7, and determines The switching frequency of half-bridge 3; as figure 2 As shown in (a), the half bridge 3 includes an upper bridge arm 301 and a lower bridge arm 302, the upper and lower bridge arms can use IGBT or MOSFET power tubes, the negative pole of the power storage device 1 is connected to the lower bridge arm 301, and the positive pole is connected to the lower bridge...

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Abstract

The invention discloses an LC resonance and PTC (positive temperature coefficient) resistance band-based electric power storage device heating method. By the method, energy reciprocally flows among a direct current power supply, an LC resonant unit, a PTC resistance band and an electric power storage device to generate sinusoidal alternating current; the sinusoidal alternating current flows through an alternating current impedance real part of the electric power storage device to generate heat for internal heating, and selectively flows through the PTC resistance band to generate heat for external heating; moreover, the working current amplitude of the sinusoidal alternating current in an LC resonant circuit is regulated by controlling the working frequency of a half bridge to be close to or biased from an LC resonant frequency or regulating the resistance of the PTC resistance band. The sinusoidal alternating current flows through the alternating current impedance real part of the electric power storage device to generate heat for internal heating, and flows through the PTC resistance band to generate heat for external heating. Rapid and efficient heating is implemented inside and / or outside a battery by virtue of the impedance characteristic of a power system under excitation of the sinusoidal alternating current.

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 and a PTC resistance band. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/637H01M10/615H01M10/625
CPCB60L50/50B60L58/27H01M10/615H01M10/625H01M10/637Y02E60/10Y02T10/70
Inventor 李军求孙逢春张承宁金鑫房林林
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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