A 48v system lithium battery power cooling method

A technology of lithium battery packs and heat dissipation methods, applied in batteries, secondary batteries, circuits, etc., can solve the problems of reducing the stable operation of 48V systems, affecting the discharge capacity of battery packs, increasing fires, explosions, etc., to improve work safety, Ensure the discharge capacity and solve the effect of leakage

Active Publication Date: 2019-08-30
深圳市净相科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of the system, the motor, driven by the battery pack, can make the stopped engine speed reach 3000r / min within a few hundred milliseconds, driving the engine to re-ignite, and the battery pack is in a state of high-rate discharge. The heat is very high, too high temperature will directly affect the discharge capacity of the battery pack, and reduce the stable operation of the entire 48V system.

Method used

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  • A 48v system lithium battery power cooling method
  • A 48v system lithium battery power cooling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The light / moisture cured heat rectifying material is prepared by the following steps:

[0021] (1) Stir and compound 10 parts of silicon dioxide and 40 parts of paraffin to prepare a composite phase change material.

[0022] (2) In the pass there is N 2 Add 1 part of tetrahydrofuran and butyl butyrate mixed solution (the mass ratio of tetrahydrofuran and butyl butyrate is 1:1) into the stirred tank, stir evenly, then add 30 parts of hexamethylene diisocyanate (HDI) trimer , slowly heat up to 40°C while stirring, then add 0.5 parts of 1,4-hydroquinone, 0.3 parts of dibutyltin dilaurate and 80 parts of composite phase change material powder obtained in step (1), and react while stirring About 3 hours, slowly add 10 parts of hydroxyethyl acrylate (HEA) dropwise, continue the reaction at constant temperature for 15 minutes, slowly raise the temperature to 50°C, continue the reaction for 3 hours, then add 0.5 parts of photoinitiator IRGACURE 184 (CAS No.: 947 -19-3), conti...

Embodiment 2

[0025] The light / moisture cured heat rectifying material is prepared by the following steps:

[0026] (1) Stir and compound 50 parts of silicon dioxide and 100 parts of paraffin to prepare a composite phase change material.

[0027] (2) In the pass there is N 2 Add 2 parts of tetrahydrofuran and butyl butyrate mixed solution (the mass ratio of tetrahydrofuran and butyl butyrate is 9:1) in the stirred tank, stir evenly, then add 80 parts of hexamethylene diisocyanate (HDI) trimer , slowly heated up to 60°C while stirring, then added 2 parts of 1,4-hydroquinone, 1.6 parts of dibutyltin dilaurate and 500 parts of the composite phase change material powder obtained in step (1), and reacted while stirring About 6 hours, slowly add 35 parts of hydroxyethyl acrylate (HEA) dropwise, continue the reaction at constant temperature for 45 minutes, slowly raise the temperature to 90°C, continue the reaction for 6 hours, then add 2 parts of photoinitiator DAROCUR 1173 (CAS No.: 7473 -98-5...

Embodiment 3

[0030] The light / moisture cured heat rectifying material is prepared by the following steps:

[0031] (1) Stir and compound 30 parts of alumina and 80 parts of stearic acid to prepare a composite phase change material.

[0032] (2) In the pass there is N 2 Add 1.5 parts of tetrahydrofuran and butyl butyrate mixed solution (the mass ratio of tetrahydrofuran and butyl butyrate is 5:1) into the stirred tank, stir evenly, then add 55 parts of hexamethylene diisocyanate (HDI) trimer , slowly heat up to 50°C while stirring, then add 1 part of 1,4-hydroquinone, 1 part of dibutyltin dilaurate and 290 parts of composite phase change material powder obtained in step (1), and react while stirring About 4 hours, slowly add 20 parts of hydroxyethyl acrylate (HEA) dropwise, continue the reaction at constant temperature for 30 minutes, slowly raise the temperature to 70°C, continue the reaction for 4 hours, then add 1 part of photoinitiator IRGACURE 127 (CAS No.: 474510 -57-1), continue to...

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Abstract

The invention relates to the field of new energy automobiles, in particular to a power supply radiating scheme for a 48V system lithium battery pack. The power supply radiating scheme is characterized in that light / moisture-cured heat rectification materials are embedded on the basis of an existing 48V lithium battery pack, and an obtained device comprises the battery pack formed by a plurality of square batteries, the light / moisture-cured heat rectification materials, an insulating layer and a BMS substrate; the light / moisture-cured heat rectification materials are embedded into a gap between every two adjacent square batteries, the insulating layer wraps the bottom of the battery pack, and the BMS substrate is arranged at the top of the battery pack. The power supply radiating scheme has the advantages that the problem of phase change material leakage is solved effectively, and shape variety, simpleness in construction and the like are achieved; the temperature of a 48V system can be effectively controlled within 60 DEG C, the discharge capacity of the batteries is guaranteed, the stable operation of the 48V system is guaranteed, and the work safety of the 48V system is increased.

Description

technical field [0001] The invention belongs to the field of new energy vehicles, and in particular relates to a method for dissipating heat from a lithium battery pack power source in a 48V system. Background technique [0002] The concept of the 48V system first originated in 2011 when several German vehicle manufacturers including Audi, BMW, Porsche and Volkswagen jointly launched and formulated the LV148 standard. The 48V system technology has four main functions: coasting start and stop, energy recovery, motor assist and electric crawling (pure electric drive). In the field of hybrid vehicles, 48V lithium-ion battery pack systems are mainly used in micro-hybrid or weak-hybrid systems. Under the stricter carbon dioxide emission limit pressure, 48V systems are more and more popular because of their advantages of increasing effective costs and significantly saving energy and reducing emissions. Pay more attention. [0003] One of the keys to the 48V system lies in lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/653H01M10/6555H01M10/0525
CPCH01M10/0525H01M10/613H01M10/625H01M10/653H01M10/6555H01M2220/20Y02E60/10
Inventor 刘鉴陈炎丰程镜江
Owner 深圳市净相科技有限公司
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