Heating system of power battery of pure electric automobile and control method thereof

A pure electric vehicle and power battery technology, applied in electric vehicles, battery temperature control, secondary batteries, etc., can solve the problems affecting the power and driving range of the whole vehicle, and consume battery power, etc., to achieve simple control methods and expand The effect of using range

Active Publication Date: 2011-02-02
奇瑞新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments in an ideal laboratory show that it takes less than 10 minutes for the heating system to heat from -25°C to the set temperature, but the actual temperature changes in severe cold areas and the complexity of the operating conditions of electric vehicles make the heating time very likely t

Method used

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  • Heating system of power battery of pure electric automobile and control method thereof
  • Heating system of power battery of pure electric automobile and control method thereof
  • Heating system of power battery of pure electric automobile and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the heating system of the pure electric vehicle power battery in this embodiment includes a battery heating device 11 installed in the battery pack 1. The battery heating device 11 is provided with a hollow cooling fin 111, and the cooling fin 111 is provided with a water inlet and a water outlet. , the heating system also includes an auxiliary heater 2, the auxiliary heater 2 is connected with the fuel supply device 3, the auxiliary heater 2 has a built-in heat exchanger 21, and the water inlet of the heat exchanger 21 passes through the water pump 4 and the water pipe and the expansion tank 5 The water outlet of the heat exchanger 21 communicates with the water inlet of the air conditioning system 9 and the water inlet of the cooling fin 111 through the second electronically controlled three-way valve 62, and the water outlet of the air conditioning system 9 and the outlet of the cooling fin 111 The water port communicates with the water inl...

Embodiment 2

[0035] Such as Figure 5 As shown, the heating system of the pure electric vehicle power battery in this embodiment includes a battery heating device 11 installed in the battery pack 1. The battery heating device 11 is provided with a hollow cooling fin 111, and the cooling fin 111 is provided with a water inlet and a water outlet. , the heating system also includes an auxiliary heater 2, the auxiliary heater 2 is connected with the fuel supply device 3, the auxiliary heater 2 has a built-in heat exchanger 21, and the water inlet of the heat exchanger 21 passes through the water pump 4 and the water pipe and the expansion tank 5 The water outlet of the heat exchanger 21 communicates with the water inlet of the cooling fin 111 through the electric control valve 6, and the water outlet of the cooling fin 111 communicates with the water inlet of the expansion tank 5. The electric control valve 6, auxiliary heating The device 2 and the water pump 4 are connected to and controlled ...

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Abstract

The invention aims to provide a heating system of a power battery of a pure electric automobile and a control method thereof, which are used for eliminating the influence of low temperature on the performance of the power battery of the pure electric automobile to ensure that the pure electric automobile can be used in severe cold areas in winter. The heating system comprises a battery heating device which is arranged in a battery pack, wherein the battery heating device is provided with a hollow radiating fin; and the radiating fin is provided with a water inlet and a water outlet. The heating system is characterized by also comprising an auxiliary heater, wherein the auxiliary heater is connected with a fuel supply device; a heat exchanger is arranged in the auxiliary heater; the water inlet of the heat exchanger is communicated with the water outlet of an expansion water tank by a water pump and a water pipe; the water outlet of the heat exchanger is communicated with the water inlet of the radiating fin by an electric control valve; the water outlet of the radiating fine is communicated with the water inlet of the expansion water tank; the electric control valve, the auxiliary heater and the water pump are connected with a vehicle controller and are controlled by the vehicle controller; and the vehicle controller is also connected with a battery management system.

Description

technical field [0001] The invention belongs to the technical field of pure electric vehicles, and in particular relates to a heating system for a power battery of a pure electric vehicle and a control method thereof. Background technique [0002] Experimental studies have shown that the most suitable working (charge and discharge) temperature for power lithium batteries used in pure electric vehicles is 35-45°C. When used in severe winter regions (such as temperatures below -25°C), the discharge performance and charge acceptance The capacity is greatly reduced by the influence of low temperature. For example, if the power battery pack is arranged under the floor of the compartment, even if its bottom is completely sealed by the body floor, it will not be affected by the low temperature outside. Therefore, during driving, the heat generated by the battery discharge may be less than that of the battery pack. The heat dissipation from the package to the outside causes the temp...

Claims

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Application Information

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IPC IPC(8): B60R16/08B60H1/00B60L11/18H01M10/50H01M10/617H01M10/625H01M10/65
CPCY02T10/7005Y02T10/70
Inventor 李金鹏卢若振许红军王经常
Owner 奇瑞新能源汽车股份有限公司
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