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Device for active leakage of cooling liquid of power battery after collision and control method

A power battery and control method technology, applied in battery/fuel cell control devices, electrical devices, secondary batteries, etc., can solve problems such as inability to actively discharge coolant, battery damage, safety accidents, etc., and achieve passive structural safety, Effects of avoiding false discharges and improving safety

Active Publication Date: 2021-11-12
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are some problems with this structure. First of all, for most collisions, there may not be a risk that the coolant enters the battery pack. If the structure is followed, the coolant may be actively leaked in the event of a collision. It will cause unnecessary losses; secondly, if this kind of drain valve is used for control, if the drain valve is destroyed during the collision, it may not be able to actively discharge the coolant, causing damage to the battery or even a safety accident

Method used

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  • Device for active leakage of cooling liquid of power battery after collision and control method
  • Device for active leakage of cooling liquid of power battery after collision and control method
  • Device for active leakage of cooling liquid of power battery after collision and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: A vehicle equipped with an active leakage device is hit by a vehicle running a red light on the side at an intersection. The control module detects that the lateral acceleration of the vehicle is 22.8g when the collision occurs, which exceeds the second set limit value. Send a reverse current command, the electromagnet 5 drives the slider 3 to move along the sliding pipe 2 to block the coolant circulation pipe 1, the water pump is powered on, the pressure in the coolant circulation pipe rises sharply, until the sealing valve is pushed open, and the coolant is discharged , the control module warns the occupants in the vehicle through the buzzer alarm or voice prompts, and reminds the occupants to leave the vehicle;

[0053] After the maintenance, it was found that the impact caused the extrusion of the battery pack, and the storage of the battery pack was damaged. However, the timely discharge of the coolant did not cause the coolant to flow into the battery pa...

Embodiment 2

[0054] Example 2: When a vehicle equipped with an active leakage device is driving on the road, the vehicle suddenly loses control and crashes into a cement column on the side of the road. The control module detects that the lateral acceleration of the vehicle at the time of the collision is 8.9g, which is lower than the first setting Limit value, the control module does not make any instructions to the electromagnet 5 and the water pump, maintains the slider 3 at the initial position, and maintains the operation of the water pump to cool down the power battery;

[0055] After the maintenance, it was found that the impact did not cause the battery pack to be squeezed, and the battery pack was not damaged;

Embodiment 3

[0056] Example 3: When a vehicle equipped with an active leakage device is running on the road, it turns and is hit by a straight vehicle at an intersection. The control module detects that the lateral acceleration of the vehicle is 18.9g when the collision occurs, which is lower than the second set limit value but If it is higher than the first set limit value, the control module powers off the electromagnet 5 and the water pump, the slider 3 moves in the sliding pipe 2, and continuously monitors the lateral acceleration, and does not exceed the second set limit value , the control module alarms through the buzzer;

[0057] Afterwards, the maintenance found that the impact did not cause the battery pack to be squeezed, and the battery pack was not damaged.

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Abstract

The invention relates to the technical field of electric vehicle structures, and in particular relates to a device for active leakage of cooling liquid of a power battery after collision and a control method. The device comprises a cooling liquid circulating pipeline used for driving cooling liquid to circularly flow through a water pump on the pipeline so as to cool the power battery, a blocking module which is used for blocking the cooling liquid circulating pipeline when the collision occurs and the collision condition meets a preset condition, a liquid discharging module which is used for being jacked open by pressure to automatically discharge the cooling liquid when the pressure in the blocked cooling liquid circulating pipeline exceeds a set threshold value, and a control module which is used for collecting vehicle collision conditions and controlling the blocking module and the water pump according to the collision conditions. The leakage device is simple in structure, discharge of the cooling liquid is controlled completely based on the pressure of the cooling liquid circulating pipeline, the problem that automatic discharge cannot be achieved after a traditional electronic valve is powered off or damaged is solved, the safety of the battery pack is improved, loss after collision is reduced, and the leakage device has a great popularization value.

Description

technical field [0001] The invention relates to the technical field of electric vehicle structure, in particular to an active leakage device and control method for power battery cooling fluid after collision. Background technique [0002] The 2021 version of C-NCAP will carry out a side column collision assessment for new energy vehicles, with the purpose of testing the protection effect of the vehicle structure on the occupants and the power battery pack in the vehicle when it collides with a column-shaped object from the side. The implementation method of the side column collision condition is to put the vehicle on the trailer and drag it at a certain angle until it reaches the specified collision speed, and then the vehicle hits the column barrier. Since the power battery of an electric vehicle is often laid flat on the vehicle floor, and the volume of the battery needs to be enlarged in order to increase the cruising range, this results in a reduction in the deformable s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L58/26H01M10/42H01M10/613H01M10/625H01M10/633H01M10/6556H01M10/6568
CPCB60L3/0007B60L58/26H01M10/42H01M10/613H01M10/625H01M10/633H01M10/6556H01M10/6568Y02T10/70Y02E60/10
Inventor 张顺钟阳常尊辉彭刚黄耀东
Owner DONGFENG MOTOR GRP
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