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Temperature-controlled power battery pack

A technology for power battery packs and battery cells, which is applied to battery pack components, secondary batteries, circuits, etc., can solve problems such as explosion and shorten the life of power batteries, achieve uniform temperature field distribution, and improve the effect of cooling effect.

Inactive Publication Date: 2016-08-24
JINAN LUFANG ZHIHE INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the present invention provides a temperature-controlled power battery pack, which is used for temperature control of the power battery, especially for cooling the main surface, so as to solve the problems of life reduction and explosion caused by the temperature rise of the power battery.

Method used

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Effect test

Embodiment 1

[0039] Embodiment 1, in the process of manufacturing the temperature equalizing component 2, it is necessary to consider the deformation and expansion caused by the heating process of the battery core 1, and comprehensively utilize the deformation to achieve the purpose of effectively controlling the temperature rising process.

[0040] The temperature uniform assembly 2 includes a left housing 21, a right housing 22, a liquid guide piece 23, a liquid inlet pipe 24, and a liquid outlet pipe 25, wherein the left and right housings are symmetrical structures, and are integrally formed by buckling and surrounding welding , to form a complete shell, and take the left shell 21 as an example to describe in detail, the left shell 21 is stamped from a thin plate made of stainless steel, and is designed as an outwardly convex structure 211, which is used to cooperate with the liquid guide sheet. refer to Figure 5 , and a groove 212 for clamping the battery core is provided on the oute...

Embodiment 2

[0053] Embodiment two, such as Figure 11 , the inner surfaces of the left and right housings are provided with spiral protrusions 21' that are spirally distributed from the middle to the surroundings. The spiral protrusions 21' are arranged opposite to the above-mentioned spiral cloth liquid groove 235, and are basically arranged in the opposite direction of the spiral distribution groove , form a uniform structure, and under the action of external force, disperse to the outside, and improve the cooling and flow rate near the surface of the outer shell.

[0054] The above-mentioned cooling liquid adopts low-viscosity mixed oil, which has anti-explosion effect. Its components include: 150N three-type base oil with a mass ratio of 95-99%, 1.0-5.0% diphenolic propane, 0.005% methyl silicone oil or methyl Based silicone oil ester, 0.05% tricresyl phosphate, 0.1% sulfurized polyisobutylene, 100PPM demulsifier T1001 or LZ5957, and 0.2-0.3% succinate sulfonate, this special mixed oi...

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Abstract

The invention discloses a temperature-controlled power battery pack, which is used for solving the warming problem of an existing battery pack. The temperature-controlled power battery pack comprises battery cells and temperature equalizing assemblies, wherein the battery cells and the temperature equalizing assemblies are mutually superposed at intervals; each temperature equalizing assembly comprises a left shell, a right shell, a liquid guide sheet, a liquid inlet pipe and liquid outlet pipes; a cooling liquid channel is arranged in an internal chamber of each liquid guide sheet; the edges of each liquid guide sheet are embedded into joints of the corresponding left shell and right shell; a polyvinyl adhesive groove is formed in the periphery of each liquid guide sheet to form an adhesive joint; temperature equalizing fields are formed between one of two sides of each liquid guide sheet and the corresponding left shell, and between the other side and the corresponding right shell respectively; center holes and spiral liquid distribution slots are formed in two side surfaces of each liquid guide sheet; disturbance films are arranged in the spiral liquid distribution slots; and the shells and the liquid guide sheets are connected through four liquid outlet pipes and one liquid inlet pipe to form a cooling medium flow channel. By the temperature-controlled power battery pack, the flow velocity of a cooling medium in each temperature equalizing assembly can be controlled, so that the target of controlling the internal temperature of the corresponding battery cell is achieved.

Description

technical field [0001] The invention relates to the technical field of new energy power batteries, specifically a temperature-controlled power battery pack with better temperature control effect. Background technique [0002] The power battery is the core component of the electric vehicle, and its performance directly affects the performance of the electric vehicle. The power battery is generally large in size and occupies the position of the chassis of the vehicle, and its heat dissipation effect is very poor. [0003] Today's batteries are generally cooled by natural cooling, air cooling or water cooling. Since power batteries are generally lithium batteries, taking lithium batteries as an example, the best internal charge and discharge temperature should not be higher than 140°C, and the external temperature should not be high. Temperature below 80°C, otherwise the service life and charge and discharge effect of the battery will be reduced. [0004] Among them, the three...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/625H01M10/6568H01M2/36H01M50/609
CPCH01M10/613H01M10/625H01M10/6568H01M50/60Y02E60/10
Inventor 陈华锋
Owner JINAN LUFANG ZHIHE INFORMATION TECH CO LTD
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