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Measurement device for inner temperature of battery

An internal temperature and measuring device technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as hindering ion transmission, affecting battery cycle life, and affecting battery electrochemical performance.

Active Publication Date: 2014-07-02
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature sensor implanted inside the battery will affect the electrochemical performance of the battery
The sensor mixed with the electrolyte hinders the transport of ions, significantly affecting the cycle life of the battery

Method used

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  • Measurement device for inner temperature of battery
  • Measurement device for inner temperature of battery
  • Measurement device for inner temperature of battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] In this embodiment, the battery to be tested is a single soft-pack lithium-ion battery, wherein the positive electrode active material of the single soft-pack lithium-ion battery is a nickel-cobalt-manganese ternary material, the negative electrode active material is graphite, and the capacity is 12.5 Ah. Two single pouch lithium-ion batteries with the same material and geometric structure were provided and connected in parallel to form the battery pack with a capacity of 25Ah, and assembled into the internal temperature measuring device of the battery.

[0040] Please also refer to image 3 , thermal runaway of the battery under test occurs at about 250°C. Before thermal runaway occurs, that is, between 3540 minutes, during the heating process, the internal and external temperatures of the battery internal temperature measuring device 100 are basically the same. When thermal runaway occurs, the internal temperature of the battery internal temperature measuring device...

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Abstract

The invention relates to a measurement device for an inner temperature of a battery. The measurement device comprises a first packaging shell and a battery pack arranged in the first packaging shell, wherein the battery pack comprises at least two single batteries; the at least two single batteries are stacked; each single battery comprises a battery core and a second packaging shell; the second packaging shell is used for packaging the battery core; the measurement device for the inner temperature of the battery further comprises at least one temperature sensor; the at least one temperature sensor is arranged between the at least two single batteries and is clamped by the at least two single batteries.

Description

technical field [0001] The invention relates to a device for measuring the internal temperature of a battery, in particular to a device capable of measuring the internal temperature of the battery when thermal runaway occurs. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, electrification of vehicle power system has gradually become the mainstream of future vehicle technology development. One of the main characteristics of the electrification of the vehicle power system is to use electrical energy instead of chemical energy as the main source of energy supply. Lithium-ion batteries are one of the main choices for the power source of electric vehicles due to their advantages in energy density and cycle life. [0003] Lithium-ion battery cells meet the electric drive requirements of electric vehicles by forming a battery pack. Generally, in the process of grouping single cells, the high voltage required for electric drive i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/48
CPCH01M10/482H01M10/486Y02E60/10
Inventor 冯旭宁张明轩卢兰光欧阳明高何向明
Owner TSINGHUA UNIV
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