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Battery Pack Thermal Management System

A management system and battery pack technology, applied in the field of battery pack thermal management systems, can solve the problems of battery pack heating, difficulty in heating the battery pack, and difficulty in using the battery pack, and achieve the effect of solving the difficulty in heating

Active Publication Date: 2019-01-25
WM SMART MOBILITY (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the battery pack in the electric vehicle is difficult to heat under extremely low temperature conditions in the prior art, and further provides a thermal management system for the battery pack
When the ambient temperature is extremely low, the battery pack itself cannot be charged or discharged, and the original electric heater cannot obtain electric energy to heat the battery pack. In this case, the auxiliary heater can be used to heat the battery pack to keep the battery The battery pack can work normally after the pack is heated to an appropriate temperature, thus solving the technical problem that the battery pack for electric vehicles is difficult to use under low temperature conditions

Method used

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  • Battery Pack Thermal Management System

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a battery pack thermal management system, such as figure 1 As shown, it includes a cell temperature sensor 101, which can be arranged in the battery pack to detect the temperature value of the cell inside the battery pack; an auxiliary heater 103, which can generate heat by using other energy sources other than electric energy when it is turned on. Heating the medium in the temperature control circuit of the battery pack; the controller 102 receives the cell temperature value output by the cell temperature sensor 101, and when the cell temperature value is lower than the temperature lower limit threshold, controls the auxiliary The heater 103 is turned on, and the lower temperature threshold can be selected to be about -20°C. The energy source of the auxiliary heater 103 is not electric energy, and liquid fuel can be selected as the heater of the heat source, thus just need not consume the electric power of the whole vehicle. When the ambient t...

Embodiment 2

[0033] In the battery pack thermal management system provided in this embodiment, such as Figure 4 As shown, it also includes a motor temperature control circuit, a waste heat recovery core 208 , a first temperature sensor 204 and a second temperature sensor 112 . Wherein, one side of the waste heat recovery core 208 is attached to the outer wall of the motor temperature control circuit, and the other side is attached to the outer wall of the battery pack temperature control circuit; the first temperature sensor 204 is arranged on In the motor temperature control circuit, according to the flow direction of the medium, it is located downstream of the drive motor, and is used to detect the temperature value of the medium in the motor temperature control circuit; the second temperature sensor 112 is set at the temperature of the battery pack. In the control loop, according to the flow direction of the medium, it is arranged at the downstream direction of the battery pack, and is...

Embodiment 3

[0039] In the battery pack thermal management system provided in this embodiment, such as Figure 6As shown, it also includes an air conditioner temperature control circuit and a third temperature sensor 308: the battery cooler 109 of the battery pack temperature control circuit, and the battery cooler 109 is attached to the air conditioner temperature control circuit; the third The temperature sensor 308 is arranged in the air-conditioning temperature control circuit, and is used to detect the temperature value of the medium in the air-conditioning temperature control circuit; the controller 102 is also used to receive the detection result output by the third temperature sensor 308; When the cell temperature value is higher than the temperature upper limit threshold and the medium temperature value in the battery pack temperature control circuit is higher than the medium temperature value in the air conditioner temperature control circuit, control the battery cooler 109 and th...

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Abstract

The invention provides a battery pack thermal management system includeing a cell temperature sensor, an auxiliary heater, and a controller. The battery cell temperature sensor is used for detecting the temperature value of the battery cell in the battery pack; After the auxiliary heater is turned on, heat generated by other energy sources besides electric energy is used for heating the medium inthe temperature control loop of the battery pack; The controller receives a temperature value output from the cell temperature sensor, and controls the auxiliary heater to be turned on when the cell temperature value is lower than a lower temperature threshold value. The scheme provided by the invention can heat the battery pack through the auxiliary heater when the ambient temperature is extremely low, does not need to consume the electric energy of the whole vehicle, and the battery pack can work normally after the auxiliary heater heats the battery pack to a suitable temperature, thereby solving the problem that the battery pack of the electric vehicle is difficult to heat when the temperature is extremely low.

Description

technical field [0001] The invention relates to the technical field of battery management of electric vehicles, in particular to a battery pack thermal management system. Background technique [0002] The battery pack is the core component of an electric vehicle, but it has relatively high requirements on temperature. Its capacity decays in a low-temperature environment, and it is difficult to charge and discharge, and it is easy to cause a short circuit inside the battery cell and cause a safety accident. The problem of runaway, these characteristics are also the main factors restricting the large-scale promotion of electric vehicles. For this reason, it is necessary to develop a thermal management system specifically for battery packs. [0003] At present, the battery pack heating of electric vehicles is realized in the following way: a high-voltage electric heater is installed outside the battery pack temperature control circuit, and when the battery pack needs to be heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48H01M10/615H01M10/6556H01M10/625
CPCH01M10/42H01M10/486H01M10/615H01M10/625H01M10/6556Y02E60/10
Inventor 肖军张明梁辉
Owner WM SMART MOBILITY (SHANGHAI) CO LTD