CN215578717U

CN215578717U - Battery package heat transfer device and battery package

Info

Publication number: CN215578717U
Application number: CN202121411836.2U
Authority: CN
Inventors: 何亚飞
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-01-18
Anticipated expiration: 2031-06-24

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a battery pack heat exchange device and a battery pack. According to the battery pack heat exchange device provided by the utility model, the plurality of first positioning pieces are arranged on the inner wall of the bottom plate, the second positioning pieces which correspond to the first positioning pieces one by one are arranged on the inner wall of the cold plate facing the bottom plate, the cold plate is positioned by the insertion fit of the first positioning pieces and the second positioning pieces, and the contact surfaces of the inner wall of the bottom plate and the cold plate and the contact surfaces of the first positioning pieces and the second positioning pieces are fixed by gluing, so that the gluing area between the bottom plate and the cold plate is increased, the bonding strength of the cold plate and the lower box body is improved, and the degumming accident of the cold plate caused by frequent mechanical vibration can be effectively prevented. The battery pack provided by the utility model comprises the battery pack heat exchange device, so that the bonding strength of the lower box body and the cold plate is improved, the cold plate is prevented from being degummed, and the battery cell module is effectively cooled.

Description

Battery package heat transfer device and battery package

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a battery pack heat exchange device and a battery pack.

Background

The electric core module of lithium cell is installed in the battery package box usually, utilizes the battery package box to fix the electric core module. Can produce the heat among the lithium cell working process, in order to dispel the heat to the lithium cell, the box diapire that sets up in the box of battery package box usually plays the cold drawing of radiating effect.

In the prior art, the lower surface of the cold plate is usually adhered to the inner bottom wall of the box body in an adhesive manner, then the upper surface of the cold plate is coated with adhesive, and the lower surface of the battery cell module is adhered to the upper surface of the cold plate.

But when the above-mentioned battery package that will install the lithium cell module is used for the car, under frequent mechanical shock, there is great risk of coming unstuck in the bonding interface of cold drawing and electric core module and the bonding interface of cold drawing and box diapire.

Therefore, a heat exchange device for a battery pack is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery pack heat exchange device and a battery pack, which can reduce the degumming risk of a battery cell module.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a battery pack heat transfer device comprising:

the lower box body is provided with a bottom plate, and a plurality of first positioning pieces are arranged on the inner wall of the bottom plate; and

the cold plate is used for circulating cooling liquid, the cold plate is flatly paved on the inner wall of the bottom plate, second positioning pieces which correspond to the first positioning pieces one by one are arranged on the surface, facing the bottom plate, of the cold plate, and the first positioning pieces are in inserting fit with the corresponding second positioning pieces;

the contact surface of the inner wall of the bottom plate and the cold plate and the contact surface of the first positioning piece and the second positioning piece are fixed through gluing.

As a preferable technical solution of the above heat exchanger for battery pack, the first positioning element is a groove, and the second positioning element is a protrusion engaged with the groove.

As a preferable technical solution of the above heat exchanger for battery pack, the bottom plate is recessed outward to form a plurality of grooves, and raised structures corresponding to the grooves one to one are formed on the outer side of the bottom plate, and a recessed structure is formed between two adjacent raised structures.

As a preferable technical solution of the above heat exchanger for battery pack, the opening end of the groove is a necking structure which shrinks inward, and the shape of the protrusion matches with the shape of the inner wall of the groove to limit the protrusion in the groove.

As a preferable technical scheme of the heat exchange device for the battery pack, the lower box body is a sheet metal part.

As a preferable technical solution of the heat exchanger for battery pack described above, the protrusion is integrally formed with the cold plate.

As a preferable technical solution of the above heat exchanger for battery pack, the lower case is made of steel.

As a preferable technical solution of the above heat exchanger for battery pack, a plurality of the first positioning members are distributed in an array.

The utility model also provides a battery pack, which comprises the battery pack heat exchange device.

As an optimal technical scheme of the battery pack, the battery pack further comprises a battery cell module, wherein the battery cell module is tiled on one side, back to the inner bottom wall, of the cold plate, and the battery cell module is fixed with the contact surface of the cold plate through gluing.

The utility model has the beneficial effects that: according to the battery pack heat exchange device provided by the utility model, the plurality of first positioning pieces are arranged on the inner wall of the bottom plate, the second positioning pieces which correspond to the first positioning pieces one by one are arranged on the inner wall of the cold plate facing the bottom plate, the cold plate is positioned by the insertion fit of the first positioning pieces and the second positioning pieces, and the contact surfaces of the inner wall of the bottom plate and the cold plate and the contact surfaces of the first positioning pieces and the second positioning pieces are fixed by gluing, so that the gluing area between the bottom plate and the cold plate is increased, the bonding strength of the cold plate and the lower box body is improved, and the degumming accident of the cold plate caused by frequent mechanical vibration can be effectively prevented.

The battery pack provided by the utility model comprises the battery pack heat exchange device, so that the bonding strength of the lower box body and the cold plate is improved, the cold plate is prevented from being degummed, and the battery cell module is effectively cooled.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a heat exchange device for a battery pack according to an embodiment of the present invention;

fig. 2 is an exploded view of a heat exchanger for a battery pack according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a lower case provided in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a cold plate provided by an embodiment of the present invention;

fig. 5 is a schematic view of the connection between the coolant pipe, the joint, and the upper cover according to the embodiment of the present invention.

In the figure:

1. a lower box body; 11. a base plate; 12. a first positioning member; 13. a raised structure; 14. a recessed structure;

2. a cold plate; 21. a second positioning member; 22. a coolant flow passage; 23. supporting ribs;

3. an upper cover;

4. a coolant line; 41. a first flange plate;

5. a joint; 51. a second flange.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

Among the prior art, the battery package includes electric core module and battery package heat transfer device, and the cold drawing is tiled in battery package heat transfer device's interior diapire, and electric core module is tiled in one side of cold drawing back to battery package heat transfer device's interior diapire, and the contact surface between the inner diapire of cold drawing and battery package heat transfer device, the contact surface of electric core module and cold drawing pass through sticky the fixed. When the battery pack is applied to a vehicle, the cold plate is easy to have a degumming accident due to frequent mechanical vibration. In order to solve the above technical problems, the present embodiment provides a heat exchanger for a battery pack to solve the problem that a cold plate is prone to a degumming accident due to frequent mechanical vibration.

As shown in fig. 1 to 4, the heat exchanger for a battery pack includes a lower case 1 and a cold plate 2, wherein the lower case 1 has a bottom plate 11, and a plurality of first positioning members 12 are disposed on an inner wall of the bottom plate 11; the cold plate 2 is used for circulating cooling liquid to cool the battery cell module arranged on one side, back to the bottom plate 11, of the cold plate 2, the cold plate 2 is flatly laid on the inner wall of the bottom plate 11, second positioning pieces 21 corresponding to the first positioning pieces 12 one by one are arranged on the surface, facing the inner wall of the bottom plate 11, of the cold plate 2, and the first positioning pieces 12 are in splicing fit with the corresponding second positioning pieces 21; the contact surfaces of the inner wall of the base plate 11 and the cold plate 2 and the contact surfaces of the first positioning member 12 and the second positioning member 21 are fixed by gluing.

The battery package heat transfer device that this embodiment provided, set up a plurality of first setting element 12 on the inner wall of

bottom plate

11, 2 at the cold plate face the inner wall setting of bottom plate 11 and the second setting element 21 of first setting element 12 one-to-one, peg graft the cooperation through first setting element 12 and second setting element 21 and fix a position cold plate 2, and pass through adhesive fixation with the inner wall of bottom plate 11 and the contact surface of cold plate 2 and the contact surface of first setting element 12 and second setting element 21, in order to increase the adhesive surface area between bottom plate 11 and the cold plate 2, the bonding strength of cold plate 2 and lower box 1 has been improved, can effectively prevent that cold plate 2 from taking place the accident of coming unstuck because of frequent mechanical shock.

In this embodiment, the first positioning element 12 is a groove, and the second positioning element 21 is a protrusion engaged with the groove. Preferably, a plurality of first positioning members 12 are arranged in an array to increase the adhesive strength between the cold plate 2 and the base plate 11 as much as possible; the projections are integrally formed with the cold plate 2 to simplify the process of manufacturing the cold plate 2. In other embodiments, the first positioning element 12 may be a protrusion, and the second positioning element 21 may be a groove.

Further, the bottom plate 11 is recessed outward to form a plurality of grooves, and raised structures 13 corresponding to the grooves one by one are formed on the outer side of the bottom plate 11, and a recessed structure 14 is formed between two adjacent raised structures 13. Preferably, the lower case 1 is a sheet metal member made of steel. Through the bottom plate 11 that adopts above-mentioned structure, the recess that forms on the bottom plate 11 not only can guarantee to have sufficient volume of gluing between bottom plate 11 and the cold drawing 2 to satisfy the bonding demand of bottom plate 11 and cold drawing 2, the protruding structure 13 that forms simultaneously can also regard as the stiffening beam to use, in order to improve the structural strength of box 1 down.

Furthermore, the opening end of the groove is of an inward-shrinkage structure, and the shape of the protrusion is matched with that of the inner wall of the groove so as to limit the protrusion in the groove. When assembling cold drawing 2 on bottom plate 11, make the arch insert corresponding recess through certain pressure in, carry on spacingly through the throat structure to the arch to effectively prevent that the arch from deviating from in the recess under frequent mechanical shock, further promoted the structural strength of the bonding interface between bottom plate 11 and cold drawing 2. Preferably, the inner wall of the groove is a smooth inner wall and is smoothly connected with the inner wall of the bottom plate 11.

Further, a coolant flow passage 22 through which coolant flows is provided in the cold plate 2, and a plurality of support ribs 23 are provided in the coolant flow passage 22 in order to improve the structural strength of the cold plate 2.

Further, as shown in fig. 5, the battery pack further includes an upper cover 3, a coolant pipe 4 and a connector 5, wherein a coolant flow channel 22 for flowing coolant is provided in the cold plate 2, and one end of the coolant pipe 4 is communicated with the coolant flow channel 22; the other end of the cooling liquid pipeline 4 extends out of the upper cover 3 and is plugged and hermetically connected with the joint 5. Specifically, one end of the coolant pipe 4 is inserted into the joint 5, and a sealing member such as a packing or the like is provided between the inner wall of the joint 5 and the outer wall of the coolant pipe 4.

The cooling liquid pipeline 4 is provided with a first flange 41 which is arranged integrally with the cooling liquid pipeline, and the first flange 41 is abutted against the inner wall of the upper cover 3 so as to support the upper cover 3 by the first flange 41; the joint 5 is connected with a second flange 51 integrally provided therewith, and a sealing member such as a packing or the like is provided between the second flange 51 and the outer wall of the upper cover 3.

Through set up the sealing member between second ring flange 51 and upper cover 3 outer wall, can utilize coolant liquid pipeline 4 to absorb its and upper cover 3 on be used for wearing to establish the manufacturing tolerance between the hole of wearing to establish coolant liquid pipeline 4, even the too big coolant liquid pipeline 4 that leads to of manufacturing tolerance takes place the slope, only need guarantee to connect 5 and coolant liquid pipeline 4 between sealed effective, connect 5 positions and do not change, can guarantee that the sealed between the outer wall of second ring flange 51 and upper cover 3 is effective, sealing reliability has been improved.

Furthermore, two cooling liquid pipelines 4 are arranged, namely a liquid inlet pipeline and a liquid outlet pipeline; the battery pack further includes a circulation pump for feeding the coolant into the coolant flow passage 22 through the inlet pipe and discharging the coolant in the coolant flow passage 22 through the outlet pipe. The circulation of coolant liquid is realized through the circulating pump, and the uniformity of coolant liquid and electric core module heat transfer is improved.

A temperature sensor is arranged in the cooling liquid flow passage 22, and the temperature in the cooling liquid flow passage 22 is detected in real time by the temperature sensor, so that the temperature in the cooling liquid flow passage 22 is controlled within a required range.

This embodiment still provides a battery package, including foretell battery package heat transfer device and electric core module, electric core module bonds in cold drawing 2 back to the side of bottom plate 11, has improved the bonding strength of lower box 1 and cold drawing 2, prevents that cold drawing 2 from taking place the accident of coming unstuck to effectively cool off electric core module.

It should be noted that, in order to ensure the heat dissipation efficiency of the battery cell module, the glue layer formed by bonding the battery cell module to the cold plate 2 and the glue layer formed by bonding the cold plate 2 to the bottom plate 11 are all heat-conducting glue.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. A battery pack heat transfer apparatus, comprising:

the box body (1) is provided with a bottom plate (11), and a plurality of first positioning pieces (12) are arranged on the inner wall of the bottom plate (11); and

the cold plate (2) is used for circulating cooling liquid, the cold plate (2) is paved on the inner wall of the bottom plate (11), second positioning pieces (21) which correspond to the first positioning pieces (12) one by one are arranged on the surface, facing the bottom plate (11), of the cold plate (2), and the first positioning pieces (12) are matched with the corresponding second positioning pieces (21) in an inserted connection mode;

the contact surfaces of the inner wall of the bottom plate (11) and the cold plate (2) and the contact surfaces of the first positioning piece (12) and the second positioning piece (21) are fixed through gluing.

2. The heat exchanger for battery packs as claimed in claim 1, wherein the first positioning element (12) is a recess and the second positioning element (21) is a projection which engages with the recess.

3. The heat exchanger for battery pack according to claim 2, wherein the bottom plate (11) is recessed outward to form a plurality of grooves, and a plurality of protruding structures (13) corresponding to the grooves are formed on the outer side of the bottom plate (11), and a recessed structure (14) is formed between two adjacent protruding structures (13).

4. The heat exchange device for the battery pack according to claim 3, wherein the opening end of the groove is a necking structure which shrinks inwards, and the shape of the protrusion is matched with the shape of the inner wall of the groove so as to limit the protrusion in the groove.

5. The battery pack heat exchanger according to claim 2, wherein the protrusion is integrally formed with the cold plate (2).

6. The battery pack heat exchanging device according to claim 1, wherein the lower case (1) is a sheet metal member.

7. The battery pack heat exchanging device according to claim 6, wherein the lower case (1) is made of steel.

8. The battery pack heat exchanger according to claim 1, wherein a plurality of the first positioning members (12) are arranged in an array.

9. A battery pack comprising the heat exchanging apparatus for a battery pack according to any one of claims 1 to 8.

10. The battery pack of claim 9, further comprising a cell module, wherein the cell module is tiled on a side of the cold plate (2) opposite to the bottom plate (11), and a contact surface of the cell module and the cold plate (2) is fixed by gluing.