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Degassing device and method for battery thermal management system of pure electric vehicle

A battery thermal management, pure electric vehicle technology, applied in electric vehicles, battery/fuel cell control devices, control devices, etc., can solve the problems of slow filling, complicated cooling system pipelines, and low system degassing efficiency, and achieve Adjustable time, solving low efficiency and improving work efficiency

Pending Publication Date: 2021-01-29
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the vehicle battery cooling system adopts the battery thermal management system, the cooling system pipeline becomes more and more complicated, the filling is slow, and the degassing efficiency of the system is low, which has become an urgent problem to be solved

Method used

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  • Degassing device and method for battery thermal management system of pure electric vehicle
  • Degassing device and method for battery thermal management system of pure electric vehicle
  • Degassing device and method for battery thermal management system of pure electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A degassing start-stop switch 2 is added to the battery thermal management system 1;

[0035] ① The protection level of the switch is not lower than IP67;

[0036] ②The function of the DC-DC power supply module 8 is to convert the high-voltage AC power of the vehicle into low-voltage DC power, and supply power to the system when the system is working;

[0037] ③When the system starts, press the degassing start-stop switch 2, and the DC-DC power module 8 connects the external power supply to the cooling water pump 7; the enable signal of the BMS is turned off, at this time, the cooling water pump 7 in the battery thermal management system 1 work, start the automatic degassing function;

[0038] ④ The delay closing time of the degassing start-stop switch 2 is 5 minutes by default, and the delay closing time can be adjusted by flashing the control program of the controller 11 (the operation, stop and working time of the pump are controlled by the speed regulation signal);...

Embodiment 2

[0041] After the battery thermal management system 1 completes the automatic degassing working mode, it is necessary to manually press the degassing start-stop switch 2 again. At this time, the button is reset, and the external power supply to the cooling water pump by the DC-DC power module 8 is turned off; If the energy signal is turned on, the electrothermal thermal management system 1 can start the normal working mode (cooling, heating, self-circulation); otherwise, the battery thermal management system will not be able to start working.

Embodiment 3

[0043]① The degassing start-stop switch 2 is activated, and after the system starts filling the degassing function, in order to ensure the safety of the system, the battery thermal management system 1 itself is not allowed to operate. At this time, the enabling signal is disconnected, and the electronic fan 5 and compressor 6 are in sleep mode. state;

[0044] ②The cooling water pump 7 of the battery thermal management system runs at full speed by default after starting. In order to prevent the reverse control relay problem during actual operation, a diode 12 is added in the circuit to prevent the controller signal from reversely controlling the delay relay;

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Abstract

The invention discloses a degassing device and method for a battery thermal management system of a pure electric vehicle. The method comprises steps of pressing a degassing start-stop switch when cooling liquid is injected into a cooling circulation water path, enabling a control module to stop enabling a controller, enabling a DCDC power module to supply power to the controller and a cooling water pump, and enabling the controller to control the cooling water pump to work; the cooling liquid in the external expansion water tank is actively pumped into the cooling circulation pipeline throughthe filling degassing pipeline, and the automatic degassing function of the battery management system is achieved. The device is advantaged in that a degassing start-stop switch is designed in a battery management system, when the cooling liquid needs to be supplemented due to battery system maintenance or other reasons in the use process of a vehicle, rapid and active degassing can be achieved, aproblem that the existing filling degassing efficiency is low is effectively solved, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicle power battery systems, and in particular relates to a degassing device and method for a battery thermal management system of a pure electric vehicle, which are mainly used for cooling liquid filling and system degassing of the battery thermal management system. Background technique [0002] With the continuous improvement of current laws and regulations on automobile energy saving and emission reduction requirements, coupled with the country's encouragement policy for the promotion of new energy vehicles, pure electric vehicles, especially pure electric trucks, have gradually been favored by the market. [0003] In the design process of this type of vehicle, based on performance and safety considerations, after the energy density of the power battery system is increased to above 150Wh / kg, it is recommended that the entire vehicle be equipped with a battery thermal management system. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/26
CPCB60L58/26B60L2240/545Y02T10/70Y02E60/10
Inventor 孔刚杨胜余亮任护党刘祖峰何进红胡蜜
Owner DONGFENG COMML VEHICLE CO LTD
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