Internal temperature detection method of square laminated lithium-ion battery
A lithium-ion battery, internal temperature technology, applied in thermometers, thermometers with directly heat-sensitive electric/magnetic elements, measuring devices, etc., can solve the problems of research errors, low precision of thermal test paper, and large data errors. To achieve the effect of authentic and reliable data
Active Publication Date: 2018-04-10
ZIBO TORCH ENERGY
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Problems solved by technology
[0004] At present, there are two main ways to detect the internal temperature of lithium-ion batteries: one is to use thermal test paper to measure, but the accuracy of thermal test paper is low, and the error of the measured data is relatively large. The second is to install the thermocouple in a heat conduction device to measure the battery temperature, and the heat conduction device communicates with the outside world. Due to the heat conduction and the isolation of the shell, this method will have a greater impact on the authenticity of the measured data. influences
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[0033] Embodiments of the present invention are further described below:
[0034] The method for detecting the internal temperature of the square laminated lithium-ion battery of the present invention comprises the following steps:
[0035] (1) Anti-corrosion treatment is carried out on the probe part of the thermocouple by using EVA hot melt adhesive-metal two-layer sealing technology from inside to outside, mainly including the following steps:
[0036] a. Melt the EVA hot melt adhesive used, control the temperature of the EVA hot melt adhesive liquid, and ensure that the ultra-fine thermocouple insulation wire does not melt;
[0037] b. Insert the probe part of the thermocouple into the molten EVA hot melt glue for 0.5mm, and stay for 2-5s;
[0038] c. Lift the thermocouple out and cool down quickly;
[0039] (2) Determine the location and number of collection points, design the distribution of collection points in the battery electrode group, determine the position of th...
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Abstract
The invention relates to a method for detecting the internal temperature of a battery, in particular to a method for detecting the internal temperature of a square laminated lithium-ion battery, comprising the following steps: (1) performing anti-corrosion treatment on the probe part of the thermocouple; Target, typical pole piece, typical area; (3) Number the thermocouples, and then implant them into the typical area; (4) During the manufacturing process of the battery pole group, put the typical pole piece into the battery pole group that has been set (5) Drill a through hole in the center of the positive or negative pole; (6) Lead the thermocouple insulated wire out of the through hole, and number the thermocouple insulated wire at the same time; (7) Seal the through hole , weld the battery case cover, and then connect the thermocouples to the paperless recorder according to the number; the invention can realize accurate and true temperature detection of any position and any state of the laminated lithium-ion battery.
Description
technical field [0001] The invention relates to a method for detecting the internal temperature of a battery, in particular to a method for detecting the internal temperature of a square laminated lithium ion battery. Background technique [0002] As a new energy source with high specific energy, long life, and environmental protection, lithium-ion batteries have been widely used in military, energy, electronics, transportation and other fields. In recent years, with the increasing energy crisis and the increasing pressure on environmental protection, the application of lithium-ion batteries in electric bicycles, electric taxis, and electric vehicles has achieved a blowout growth. The capacity of bulk lithium-ion batteries is also gradually increasing. [0003] The electrolyte used in lithium-ion batteries is a flammable organic substance. It is a very unstable system in thermodynamics, and lithium-ion batteries will generate a lot of heat during use. This part of the heat ...
Claims
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IPC IPC(8): G01K7/02
Inventor 林双吴涛陈默战祥连赵艳红张传乐张兵
Owner ZIBO TORCH ENERGY