Heat management module for cylindrical batteries and preparation method thereof and battery pack
A cylindrical battery and thermal management technology, which is applied to battery pack components, battery isolation from its environment, secondary batteries, etc., can solve the problems of poor shape stability and cycle stability of components, no preheating function, and easy combustion. Achieve good thermal conductivity and temperature control function, ensure temperature uniformity, and prolong service life
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preparation example Construction
[0080] In a second aspect, the present invention provides a method for preparing a thermal management module for a cylindrical battery according to the first aspect, which includes the following steps:
[0081] (1) Spreading the thermal management material in the inner cavity of the mold; preferably, the mold is provided with a core corresponding to the position of the cylindrical hole.
[0082] (2) Clamp the mold and place it in an oven for preheating; preferably, when no oil absorbing agent is added to the thermal management material, preheat to a temperature higher than the melting point of the phase change material by 10°C, preferably higher than the melting point of the phase change material Melting point of 10 to 20 ° C. When an oil absorbing agent is added to the thermal management material, it is preheated to 10° C. higher than the melting point of the oil absorbing agent, preferably 10 to 20° C. higher than the melting point of the oil absorbing agent.
[0083] (3) C...
example 1
[0095] (1) Spread a layer of thermal management material in the inner cavity of the mold; wherein the components of the thermal management material are as shown in Table 1; wherein the components of the thermal management material are as shown in Table 1;
[0096] (2) Place the mold in an oven to preheat after closing the mold;
[0097] (3) Compression forming;
[0098] (4) After cooling down, the mold is disassembled, and the prefabricated block is taken out to obtain a thermal management module for a cylindrical battery; Figure 8 Actual pictures are shown.
[0099] (5) Put the cylindrical battery into the cylindrical hole of the thermal management module to obtain the battery pack.
[0100] Examples 2 to 30
[0101] Examples 2 to 30 were performed in the same manner as Example 1 except for the contents shown in Table 1 below. The enthalpy value, phase transition temperature and thermal conductivity of the thermal management material were detected, and the detection result...
example 31
[0107] Example 31 is basically the same as Example 1, the only difference is that in step (1), a layer of expanded graphite powder is evenly spread on the bottom of the mold cavity; then, the powder of the heat management material is evenly spread; finally, Spread a layer of expanded graphite powder uniformly again. Thereby, graphite sealing layers 12 are formed on the upper surface and the lower surface of the thermal management material molded body 11 .
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