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Battery system with adjustable heating speed and control method thereof

A heating speed, battery system technology, applied in the power supply of electric heating circuit, battery/fuel cell control device, battery and other directions, can solve the problems of fast heating rate, low maintenance difficulty, slow heating speed, etc. The effect of long driving range

Pending Publication Date: 2020-06-02
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY 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 address the above defects, to provide a battery system with adjustable heating speed and its control method, so as to solve the problems of unadjustable heating power and slow heating speed of the battery system in the prior art, and to achieve a fast heating speed of the battery system. , low failure rate, low maintenance difficulty and good safety

Method used

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  • Battery system with adjustable heating speed and control method thereof
  • Battery system with adjustable heating speed and control method thereof
  • Battery system with adjustable heating speed and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The single battery is a lithium-ion battery with a single capacity of 70Ah and a rated voltage of 3.7V. The battery system is 4 parallel and 36 in series. The battery heater 2 is made of nickel with a resistance of 80mΩ. The heater 2 is built into the battery. The connection mode of 2 is 4 in parallel and 36 in series, the ambient temperature is -20°C, and the battery management system 6 sends the parking heating mode to the heating control module 7 . After the battery management system 6 sends the heating mode to the heating control module 7, the PWM transmission duty cycle is 100%, the heating control module 7 starts quickly, the IGBT is 100% turned on, and heats at the maximum speed, the maximum heating current is 147A, and the temperature of the battery system is The speed rises rapidly every 5°C / min, and when the battery temperature reaches the set stop heating temperature of 10°C, the heating control module 7 stops the heating operation, and the heating stops. At ...

Embodiment 2

[0057] The single battery is a lithium-ion battery with a single capacity of 70Ah and a rated voltage of 3.7V. The battery system is 4 parallel and 36 in series. The battery heater 2 is made of nickel with a resistance of 80mΩ. The heater 2 is built into the battery. The connection mode of 2 is 4 in parallel and 36 in series, the ambient temperature is -20°C, the vehicle is plugged into a DC charger, and the battery management system 6 sends the DC charging heating mode to the heating control module 7 . The heating control module 7 sends a PWM duty cycle of 60%, the heating control module 7 starts, controls the IGBT pulse work, and the heating starts, the heating current is 149A, the output current of the charger is set to 60A, and the temperature of the battery system is set at 5°C / min The speed rises rapidly. When the battery temperature reaches the charging stop heating temperature of 10°C, the heating control module 7 stops the heating action, the heating stops, the charger...

Embodiment 3

[0059] The single battery is a lithium-ion battery with a single capacity of 70Ah and a rated voltage of 3.7V. The battery system is 4 parallel and 36 in series. The battery heater 2 is made of nickel with a resistance of 80mΩ. The heater 2 is built into the battery. The connection mode of 2 is 4 in parallel and 36 in series, the ambient temperature is -20°C, the vehicle is plugged into the AC charging cable, and the battery management system 6 sends the AC charging heating mode to the heating control module 7 . The heating control module 7 sends a PWM duty cycle of 90%, the heating control module 7 starts, controls the IGBT pulse work, and starts heating. The heating current is 139A, the output current of the charger is set to 20A, and the temperature of the battery system is set at 5°C / min. The speed rises rapidly. When the battery temperature reaches the charging stop heating temperature of 10°C, the heating control module 7 stops the heating action, the heating stops, the c...

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Abstract

The invention relates to a battery system with an adjustable heating speed and a control method thereof. The battery system comprises a battery pack, a heating sheet, a power control module and a battery management system. When the temperature of the battery pack is lower than a preset self-heating starting temperature, the power control module is started, the battery management system transmits collected battery pack state information to the power control module, the power control module adjusts the current on-off time and the switching frequency of the heating sheet through PWM signals to adjust the heating power and the heating speed, therefore battery self-heating is achieved. When the temperature of the battery pack reaches a preset self-heating closing temperature, the power controlmodule is turned off, and heating is stopped; wherein the power control module further comprises a current adjustment module, a current acquisition module and a heating control module. The power battery system has the beneficial effects of high heating rate at low temperature, long driving range, and quick charging at low temperature.

Description

technical field [0001] The invention belongs to the battery technical field of electric vehicles, and in particular relates to a battery system with adjustable heating speed and a control method thereof. Background technique [0002] With the rapid development of the new energy industry, electric vehicles have spread to all parts of the world. The core of electric vehicles is the battery system, and the charging and discharging performance of the battery system greatly affects the power and economy of electric vehicles. On the one hand, under low temperature conditions, the charging and discharging power of the battery system of electric vehicles is low, which greatly affects the power performance, driving range and charging time of electric vehicles, and users complain a lot; on the other hand, although it is applied to low temperature Electric vehicles in the region already have heating systems and heat preservation systems for their battery systems, but they all have the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/27H01M10/615H01M10/625H01M10/635H01M10/6571
CPCH01M10/615H01M10/625H01M10/635H01M10/6571B60L2240/545B60L2240/547B60L2240/549B60L58/27B60L1/02B60L3/0046B60L3/12B60L1/16H01M2220/20H01M10/06H01M10/0525H01M10/345H01M10/30H01M10/052H01M10/32H01M8/04037Y02E60/50B60L3/0084B60L2250/10B60Y2306/15B60Y2200/91Y02T10/70
Inventor 吴宁宁毛永志郭长新
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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