CN210468036U

CN210468036U - Liquid cooling plate for battery pack of pure electric vehicle

Info

Publication number: CN210468036U
Application number: CN201921841469.2U
Authority: CN
Inventors: 谷夏先; 郭庆松; 金焕
Original assignee: Shanghai Yiwei Electronic Technology Co Ltd
Current assignee: Shanghai Yiwei Electronic Technology Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-05-05
Anticipated expiration: 2029-10-30

Abstract

The utility model discloses a electricelectric motor car battery package liquid cooling plate, include: the device comprises a liquid inlet pipe, a liquid return pipe and a micro-channel pipeline, wherein the number of the micro-channel pipeline is 7, the top end of the micro-channel pipeline is connected with the liquid inlet pipe, the tail end of the micro-channel pipeline is connected with the liquid return pipe, and the micro-channel pipeline comprises a heat-conducting circular pipe; a plurality of heat conduction grooves are formed in the surface of the heat conduction circular tube and surround the surface of the heat conduction circular tube, a plurality of radiating fins are arranged inside the heat conduction grooves, a hole channel is formed inside the heat conduction circular tube, and a plurality of heat conduction fins are evenly arranged on the inner wall of the hole channel. Compared with the liquid cooling plate structure of the rectangular micro-channel on the market, the liquid cooling plate structure has small pressure drop, under the same flow, the pressure drop of the liquid cooling plate is 24.1Kpa, the pressure drop of the liquid cooling plate of the rectangular micro-channel is 28.9Kpa, and 4.8Kpa is reduced; offer the heat conduction recess on the heat conduction pipe to set up the fin in the heat conduction recess, can improve the heat conduction speed of battery, the contact of the heat conduction piece and the coolant liquid of inside setting can take the heat out fast, improves the radiating efficiency.

Description

Liquid cooling plate for battery pack of pure electric vehicle

Technical Field

The utility model relates to an automobile battery technical field, more specifically are a pure electric vehicle battery package liquid cooling board.

Background

With the increasing of the specific energy of the power battery, under the condition of high-rate discharge of the battery pack, the flow rate of air required by the cooling of the battery pack is larger, so that the power requirement of the fan is greatly increased while huge noise is generated, the requirement of the electric automobile is gradually not met, and meanwhile, the air cooling effect in a high-temperature environment is not ideal, so that the air convection heat exchange technology gradually does not meet the requirement. Liquid flow heat exchange is a form of thermal management that uses a liquid with a higher thermal conductivity coefficient to indirectly contact the battery to carry away heat. In the structural design scheme, the liquid cooling plate is in contact with the battery, heat is transmitted into the liquid cooling plate from the battery pack, and then the battery pack is taken out through the heat between the liquid cooling plate and the liquid.

At present, the existing liquid cooling plate packed by a battery has the following problems: (1) the rectangular microchannel liquid cooling plate on the market has a large pressure drop value, so that the pipeline is easily damaged, and the service life is shortened; (2) the heat conduction speed is slow, and the heat on the surface of the battery cannot be quickly led out, so that the normal use of the battery is influenced. For this reason, a new scheme needs to be designed to give improvements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pure electric vehicle battery package liquid cooling board has solved the problem that proposes in the background art, satisfies the in-service use demand.

In order to achieve the above object, the utility model provides a following technical scheme: a battery pack liquid cooling plate for a pure electric vehicle comprises: the heat exchanger comprises a liquid inlet pipe, a liquid return pipe and micro-channels, wherein the number of the micro-channels is 7, the top ends of the micro-channels are connected with the liquid inlet pipe, the tail ends of the micro-channels are connected with the liquid return pipe, the micro-channels comprise heat-conducting circular pipes, and the number of the heat-conducting circular pipes is 37; the heat conduction pipe is characterized in that a plurality of heat conduction grooves are formed in the surface of the heat conduction circular pipe, the heat conduction grooves surround the surface of the heat conduction circular pipe, a plurality of radiating fins are arranged inside the heat conduction grooves, a hole channel is formed inside the heat conduction circular pipe, and a plurality of heat conduction fins are evenly arranged on the inner wall of the hole channel.

As a preferred embodiment of the present invention, the micro-through pipe is made of aluminum material, and both ends of the micro-through pipe are connected to the liquid inlet pipe and the liquid return pipe by friction stir welding.

As a preferred embodiment of the utility model, the inner wall of heat conduction recess is the arc structure, the fin is the loop configuration and surrounds in heat conduction recess surface, fin outer end and heat conduction pipe outer wall parallel and level.

As a preferred embodiment of the present invention, the heat conducting fin and the heat conducting circular tube are integrally formed, and the free end of the heat conducting fin extends downward to be inclined.

Compared with the prior art, the beneficial effects of the utility model are as follows:

(1) the pressure drop of the liquid cooling plate is smaller than that of a liquid cooling plate structure of a rectangular micro-channel on the market, under the same flow, the pressure drop of the liquid cooling plate is 24.1Kpa, the pressure drop of the liquid cooling plate of the rectangular micro-channel is 28.9Kpa, and the 4.8Kpa is reduced.

(2) This liquid cooling plate sets up the heat conduction recess on the heat conduction pipe to set up the fin in the heat conduction recess, can improve the heat conduction speed of battery, the contact of the inside heat conduction piece that sets up and coolant liquid can take the heat out fast, improves the radiating efficiency.

Drawings

Fig. 1 is a structural diagram of a liquid cooling plate of a battery pack of a pure electric vehicle according to the present invention;

FIG. 2 is a structural diagram of the microchannel pipeline according to the present invention;

fig. 3 is an enlarged view of a in fig. 2.

In the figure, a liquid inlet pipe 1; a liquid return pipe 2; a micro-channel pipeline 3; a heat-conducting circular tube 4; a duct 5; a heat conducting groove 6; a heat sink 7; and a heat conductive sheet 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a battery pack liquid cooling plate for a pure electric vehicle comprises: the cooling device comprises a liquid inlet pipe 1, a liquid return pipe 2 and a micro-channel pipeline 3, wherein the number of the micro-channel pipeline 3 is 7, the 7 micro-channel pipelines 3 are arranged in parallel, the top end of each micro-channel pipeline 3 is connected with the liquid inlet pipe 1, the tail end of each micro-channel pipeline is connected with the liquid return pipe 2, each micro-channel pipeline 3 comprises 37 heat-conducting circular pipes 4, the number of the heat-conducting circular pipes 4 is 37, and cooling liquid enters the 37 heat-conducting circular pipes 4 through the liquid inlet pipes to play a role in reducing pressure drop; a plurality of heat conduction recess 6 has been seted up on 4 surfaces of heat conduction pipe, heat conduction recess 6 surrounds in 4 surfaces of heat conduction pipe, and the inside a plurality of fin 7 that is provided with of heat conduction recess 6, the inside pore 5 that is provided with of heat conduction pipe 4, evenly be provided with a plurality of conducting strip 8 on the 5 inner walls in pore, there is certain clearance between the adjacent fin 7, receiving battery surface heat that can be quick, and in transmitting for the coolant liquid fast through conducting strip 8, play quick refrigerated effect.

Further improved, as shown in fig. 2: the pipe 3 that leads to a little adopts the aluminium material to make, and the selection material is 6000 or 7000 series aluminium materials, and 3 both ends that lead to a little adopt friction stir welding technique to be connected with inlet tube 1 and liquid return pipe 2 respectively, adopt friction stir welding, and the liquid cooling plate after using this welding mode welding is stable high, and intensity is good.

Further improved, as shown in fig. 2: the inner wall of the heat conduction groove 6 is of an arc-shaped structure, the radiating fins 7 are of an annular structure and surround the surface of the heat conduction groove, and the outer ends of the radiating fins 7 are flush with the outer wall of the heat conduction circular tube 4.

Specifically, the heat conducting fin 8 is integrally formed with the circular heat conducting tube 4, and the free end of the heat conducting fin 8 extends downward to form an inclined shape, the inclined direction of the heat conducting fin 8 is the same as the flowing direction of the liquid, and the direction of the arrow in fig. 3 is the flowing direction of the liquid.

The utility model discloses when using, through liquid cold plate and battery contact, earlier with heat from the group battery transmission liquid cold plate, heat 7 that the heat conduction pipe 4 surface set up can take out the heat on group battery surface fast to in transmitting to heat conduction pipe 4, the coolant liquid circulates in heat conduction pipe 4, comes to transmit the heat for the coolant liquid fast through heat conduction piece 7, plays rapid cooling's effect.

The product protected by the scheme is put into practical production and application at present, and particularly has certain success in the field of automobile batteries, so that the technical scheme of the product is obviously proved to be beneficial, meets social requirements, and is suitable for batch production and popularization and use.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack liquid cooling plate for a pure electric vehicle comprises: liquid inlet pipe (1), return liquid pipe (2) and lead to pipeline (3) a little, its characterized in that: the number of the micro-through pipelines (3) is 7, the top end of each micro-through pipeline (3) is connected with the liquid inlet pipe (1), the tail end of each micro-through pipeline is connected with the liquid return pipe (2), each micro-through pipeline (3) comprises a heat-conducting circular pipe (4), and the number of the heat-conducting circular pipes (4) is 37;

a plurality of heat conduction recess (6) have been seted up on heat conduction pipe (4) surface, heat conduction recess (6) encircle in heat conduction pipe (4) surface, and heat conduction recess (6) inside is provided with a plurality of fin (7), inside pore (5) that are provided with of heat conduction pipe (4), evenly be provided with a plurality of conducting strip (8) on pore (5) inner wall.

2. The battery pack liquid cooling plate for the pure electric vehicle according to claim 1, wherein: the micro-through pipeline (3) is made of aluminum materials, and two ends of the micro-through pipeline (3) are respectively connected with the liquid inlet pipe (1) and the liquid return pipe (2) by adopting a friction stir welding technology.

3. The battery pack liquid cooling plate for the pure electric vehicle according to claim 1, wherein: the inner wall of heat conduction recess (6) is the arc structure, fin (7) are the loop configuration and encircle in heat conduction recess (6) surface, fin (7) outer end and heat conduction pipe (4) outer wall parallel and level.

4. The battery pack liquid cooling plate for the pure electric vehicle according to claim 1, wherein: the heat conducting fins (8) and the heat conducting circular tubes (4) are integrally formed, and the free ends of the heat conducting fins (8) extend downwards to form an inclined shape.