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A battery DC/AC heating device and method

A heating device and battery technology, applied to secondary batteries, circuits, electrical components, etc., can solve the problems of low heating efficiency, uneven heat dissipation, and high cost, and achieve the effects of high heating efficiency, fast heating speed, and easy operation.

Active Publication Date: 2019-08-20
BEIJING WELION NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a battery DC / AC heating device and method in order to solve the problems of uneven heat dissipation, low heating efficiency and high cost in the prior art

Method used

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  • A battery DC/AC heating device and method
  • A battery DC/AC heating device and method
  • A battery DC/AC heating device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] figure 1 It is a schematic diagram of the principle of the device provided by the embodiment of the present invention, such as figure 1 As shown, the device includes: a DC power supply 1 and an AC power supply 2. The above DC power supply 1, AC power supply 2 and battery 3 form a parallel circuit. The DC power supply includes a transformer, rectification, filtering, and stabilization. The peak output voltage of the AC power supply is higher than the output voltage of the DC power supply.

[0022] The output voltage of DC power supply is 110V~1000V; the voltage output range of AC power supply is 220V~1000V; the frequency of AC power supply is 30HZ~10000HZ.

[0023] Preferably, the range of the difference between the peak output voltage of the AC power supply and the output voltage of the DC power supply is 0.1-20V. More preferably, the difference range is 0.5-10V.

[0024] Preferably, the DC power supply circuit is short-circuit protected. For example, a diode is used for sho...

Embodiment 2

[0040] The DC power supply and the AC power supply are connected in parallel at both ends of the battery. The DC output voltage is 380V, the AC output voltage is 385V, and the frequency is 50HZ. The battery is a ternary lithium ion battery. The DC power supply and the AC power supply circuit adopt diodes for short-circuit protection. The ripple factor of the DC power supply is 1%, and the output voltage adjustment rate of the DC power supply is 3%. There will be two short-circuit points in every 20ms change period of the AC power supply. At this time, the battery short-circuits and heats up and the temperature rises. At an ambient temperature of -15°C, using this method to charge the ternary lithium battery while heating it, the temperature of the ternary lithium battery increases from -13.5°C to 10°C, and the time taken is 2810s.

Embodiment 3

[0042] The DC power supply and the AC power supply are connected in parallel at both ends of the battery. The DC output voltage is 380V, the AC output voltage is 385V, and the frequency is 1000HZ. The battery is a ternary lithium ion battery. The DC power supply and the AC power supply circuit adopt diodes for short-circuit protection. The ripple factor of the DC power supply is 1%, and the output voltage adjustment rate of the DC power supply is 3%. There will be two short-circuit points in every 1ms change period of the AC power supply. At this time, the battery is short-circuited and the temperature rises. At an ambient temperature of -15°C, this method is used to heat the ternary lithium battery while charging, and the temperature of the ternary lithium battery rises from -13.5°C to 10°C, which takes 310s.

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PUM

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Abstract

The invention relates to a battery direct current / alternating current heating device. The battery direct current / alternating current heating device comprises a direct current power supply, and an alternating current power supply; a parallel circuit is composed of the direct current power supply, the alternating current power supply, and a battery; the direct current power supply comprises a transformer, a rectifier filter, and a voltage stabilizer; the output peak voltage of the alternating current power supply is higher than the output voltage of the direct current power supply. The battery direct current / alternating current heating device is capable of heating batteries rapidly at a low temperature, no extra heating medium or pipelines are needed, heating speed is fast, heating efficiency is high, the structure is simple and reliable, and operation is convenient.

Description

Technical field [0001] The invention relates to the field of lithium batteries, in particular to a battery DC / AC heating device and method. Background technique [0002] The dual pressures of energy scarcity and environmental pollution have boosted the rapid development of chemical power technology. At present, lithium batteries have become the heart of electric products such as electric vehicles, mobile phones, drones, and power tools, and their performance directly affects their use. The use effect of electrical products. Lithium battery is a kind of chemical power source, which realizes charging and discharging through chemical reaction. It is composed of battery core, electrolyte and battery shell. When the lithium battery is working, the lithium ion uses electrolyte as the carrier, which is in the positive of the battery core. Move between the negative electrodes to charge and discharge the battery. However, due to the decrease of the material conductivity and chemical rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/637
CPCY02E60/10
Inventor 俞会根向晋黄杰张雷田启友
Owner BEIJING WELION NEW ENERGY TECH CO LTD