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Battery Pack Top Squeeze Test Method

A test method, battery pack technology, applied in the direction of applying stable tension/pressure to test material strength, etc.

Active Publication Date: 2021-08-31
CHINA AUTOMOTIVE ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the extrusion test in the top direction has not been involved so far. Therefore, it is necessary to propose a test method capable of extruding the top of the battery pack to verify whether the structural strength of the top of the battery pack meets the design requirements of the entire vehicle, thereby ensuring the safety of electric vehicles. Mechanical safety and reliability

Method used

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  • Battery Pack Top Squeeze Test Method
  • Battery Pack Top Squeeze Test Method
  • Battery Pack Top Squeeze Test Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like figure 1 , The top of the battery pack of the present embodiment is the extrusion test method, comprising the steps of:

[0037] Pretreatment Battery pack: adjust the battery pack, the battery pack insulation resistance ≥100Ω / V, the leakage current insulation test ≤10mA; state of charge of the battery pack within a range of 0% -100% range. Maintaining the voltage of the battery pack factory condition. Adjust the ambient temperature, the ambient temperature before the test is 18-28 degrees.

[0038] Test sample preparation: after adjusting the battery pack is fixed to the fixing means, it is determined whether or not the battery pack with a liquid cooling system, if having, filled with coolant in the battery pack and closure. Determining the location of the top and pressing the test point marked on an outer surface of the battery pack. If the battery pack has a weak pre-set position one or more than one, select the weak position of the battery pack as a top pressing a...

Embodiment 2

[0058] The battery pack according to the present embodiment the top push test method, comprising the steps of:

[0059] Pretreatment Battery pack: adjust the state of charge of the battery pack 50%, before the positive electrode of the battery pack housing 11 M test, the negative electrode of the casing 11 M, the total voltage is 321.2V, (for housing the positive electrode 12 m, the negative electrode of the casing 12 m) prior to testing the battery pack insulation test leakage current was 4.59mA.

[0060] 2) Test Sample Preparation: after pretreatment battery pack fixed to the fixing means, the cooling liquid filled in the liquid cooling system and the battery pack block, to determine the position of the top and pressing the test point marked on the surface of the housing of the battery pack out, if there is more than one position of weakness, the weak position of the battery pack to select a marked. In turn squeezed.

[0061] 3) Test platform structures: The top of the extrusion...

Embodiment 3

[0066] The battery pack according to the present embodiment the top push test method, comprising the steps of:

[0067] Pretreatment Battery pack: adjustment of state of charge of the battery pack 90%, the total voltage before testing 385.3V, (positive for housing 126MΩ, the negative electrode of the housing 127MΩ), the battery pack before testing insulation test leakage current is 6.5mA .

[0068] 2) Test Sample Preparation: after pretreatment battery pack fixed to the fixing means, the cooling liquid filled in the liquid cooling system and the battery pack block, to determine the position of the top and pressing the test point marked on the surface of the housing of the battery pack out, if there is more than one position of weakness, the weak position of the battery pack to select a marked. In turn squeezed.

[0069] 3) Test platform structures: The top of the extrusion head for the extrusion test the selected φ150mm ball head extrusion head mounting plate is fixed on the extru...

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Abstract

The invention relates to the technical field of battery testing, and specifically discloses a battery pack top extrusion test method comprising the following steps: battery pack pretreatment: adjusting the battery pack; test sample preparation: fixing the adjusted battery pack on a fixing mechanism, determining the top extrusion The position of the compression test point is marked on the outer surface of the battery pack; test platform construction: connect the extrusion head to the extrusion test equipment; top extrusion test: adjust the position of the battery pack on the fixing mechanism of the extrusion test equipment so that the squeeze The surface of the indenter is in contact with the squeeze test point on the top of the battery pack, and the squeeze test equipment is squeezed according to the test information; standing after the test: let the squeezed battery pack stand for 10‑600min; check after the test: measure the battery pack Insulation resistance and insulation withstand voltage test leakage current, when the insulation resistance value ≥ 100Ω / V, insulation withstand voltage test leakage current ≤ 10mA, the test is passed. By adopting the technical scheme of the invention, it can be verified whether the structural strength of the top of the battery pack meets the design requirements of the whole vehicle.

Description

Technical field [0001] The present invention relates to a battery testing technology, and particularly relates to a battery pack top extrusion test method. Background technique [0002] Electric vehicles, its core is a battery pack; and the safety of the battery pack is directly related to the safety of the vehicle. As the electric car complex environment easily have an impact on the battery pack, the battery pack is facing the risk of failure. [0003] Safety performance of the battery pack is not only related to the material system, electrical design, core structure, it is also associated with abuse of electric vehicles in the course of. Safety Evaluation Test battery pack includes an electrical safety, mechanical safety and environmental security. Battery pack for testing mechanical reliability evaluation method include vibration, mechanical shock, crash simulation and extrusion. Wherein, the main basis for the extrusion test GB / T 31467.3-2015 GB 38031-2020 or some enterpris...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08
CPCG01N3/08
Inventor 张亚明张大志周晶晶居浩王小
Owner CHINA AUTOMOTIVE ENG RES INST