Heating circuit of battery

A battery heating and charging circuit technology, which is applied to battery circuit devices, circuits, secondary battery charging/discharging, etc., can solve the problems of large battery temperature gradient, failure to maintain the battery, and slow heating, so as to achieve fast temperature rise and avoid The formation of dendrites and the effect of high temperature uniformity

Pending Publication Date: 2018-03-27
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows for better cooling of batteries while maintain their charge ability even under very cold conditions. It uses an AC high -frequency (HF) heater that charges up quickly but doesn't harm or damage any other parts of the device. By controlling this HF power level based upon factors like temperatures outside the specifications set forth within certain limits, it ensures good quality batteries are being charged properly regardless of how they may become damaged due to freezing winter weather.

Problems solved by technology

Layered double hydroxide (LDH) materials that can store or release Li+ ion when exposed to certain conditions like lower than room temperature. These layers help reduce expansion issues during repeated cycles without losing effectiveness under extreme environmental factors. They also enhance electrode material' ability to conduct electrical currents effectively even if used alone. Overall these technical effects make them ideal candidates for improving the performance and durability of redoable lithium secondary cells (LSC).

Method used

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Embodiment Construction

[0028] figure 1 A battery charging strategy adopted by a battery heating circuit according to an embodiment of the present invention is disclosed. In order to prolong the service life of the battery and shorten the charging time of the battery, it is not advisable to charge the battery directly under low temperature conditions, but to heat the battery first. refer to figure 1 As shown, the critical temperature is set in the charging strategy of the present invention. When the battery temperature is lower than or equal to the set critical temperature, the charging circuit works in the high-frequency heating mode, and the battery is heated by high-frequency charging and discharging of the battery, so that The battery temperature gradually rises. When the battery temperature is higher than the set critical temperature, the charging circuit switches to the normal charging mode to continuously charge the battery.

[0029] figure 2 A structural block diagram of a battery heating c

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PUM

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Abstract

The invention discloses a heating circuit of a battery. The heating circuit comprises a temperature sensor, a battery management device and a charging circuit. The temperature sensor is mounted in a battery pack; the temperature sensor detects the real-time temperature of the battery pack and sends a temperature signal. The battery management device is connected with the temperature sensor; the battery management device receives the temperature signal sent by the temperature sensor. The charging circuit is connected with the battery management device, wherein the battery management device compares the temperature signal with a critical temperature; when the temperature signal is lower than or equal to the critical temperature, the battery management device controls the charging circuit towork in a high-frequency heating mode and the charging circuit heats the battery pack; when the temperature signal is higher than the critical temperature, the battery management device controls the charging circuit to work in a charging mode and the charging circuit charges the battery pack. The heating circuit of the battery is used for realizing heating the battery through the high-frequency charging and discharging to the battery by utilizing the properties that the battery is high in internal resistance at a low temperature and generates much heat, and the influence cannot be generated tothe safety of the battery by high-frequency alternating-current charging and heating.

Description

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Claims

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Application Information

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Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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