CN215578718U

CN215578718U - Battery pack

Info

Publication number: CN215578718U
Application number: CN202121414455.XU
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 which comprises a battery pack box body, a cold plate, a liquid inlet and outlet pipe and a connector, wherein the cold plate is arranged in the battery pack box body, a cooling liquid flow channel for circulating cooling liquid is arranged on the cold plate, one end of the liquid inlet and outlet pipe is communicated with the cooling liquid flow channel, and the other end of the liquid inlet and outlet pipe penetrates out of the battery pack box body, is spliced with the connector and is hermetically connected with the connector through a first sealing piece; the joint is connected with a first flange which is arranged integrally with the joint, and a second sealing element is arranged between the first flange and the outer wall of the battery pack box body. According to the utility model, the first flange plate which is integrally arranged with the connector is arranged on the connector, and the second sealing element is arranged between the first flange plate and the outer wall of the battery pack box body, so that the manufacturing tolerance between the battery pack box body and the through hole for penetrating the liquid inlet and outlet pipe can be absorbed by the liquid inlet and outlet pipe, the sealing effect between the first flange plate and the outer wall of the battery pack box body is ensured, and the sealing reliability is improved.

Description

Battery pack

Technical Field

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

Background

Set up the cold drawing between the bottom plate of battery package and the electric core module, set up the coolant liquid runner that is used for circulating the coolant liquid in the cold drawing, the coolant liquid runner is connected with into the drain pipe, and the one end that the coolant liquid runner was kept away from to business turn over liquid pipe stretches out from the upper cover of battery package box to set up the sealing washer between the ring flange on business turn over liquid pipe and upper cover inner wall. One end of the liquid inlet and outlet pipe extending out of the upper cover is inserted into the joint and is in sealing connection with the joint so as to prevent the cooling liquid in the liquid inlet and outlet pipe from leaking.

Because of the manufacturing error between the liquid inlet and outlet pipes and the through holes on the upper cover for the liquid inlet and outlet pipes to pass through, the liquid inlet and outlet pipes are easy to incline during assembly, so that the sealing between the upper cover and the flange plates on the liquid inlet and outlet pipes is ineffective.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery pack, which can solve the problem of sealing failure between an upper cover and a flange plate on a liquid inlet and outlet pipe due to manufacturing errors between the liquid inlet and outlet pipe and a through hole in the upper cover for penetrating the liquid inlet and outlet pipe.

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

a battery pack comprises a battery pack box body, a cold plate, a liquid inlet and outlet pipe and a connector, wherein the cold plate is arranged in the battery pack box body, a cooling liquid flow channel for circulating cooling liquid is arranged on the cold plate, one end of the liquid inlet and outlet pipe is communicated with the cooling liquid flow channel, the other end of the liquid inlet and outlet pipe penetrates out of the battery pack box body, and is spliced with the connector and a first sealing element is hermetically connected with the battery pack box body;

the joint is connected with a first flange which is integrally arranged with the joint, and a second sealing element is arranged between the first flange and the outer wall of the battery pack box body.

As a preferable technical scheme of the battery pack, a second flange integrally arranged with the liquid inlet and outlet pipe is arranged on the liquid inlet and outlet pipe, and the second flange abuts against the inner wall of the battery pack box body.

As a preferable technical solution of the battery pack, the second flange is fixedly connected to the battery pack case through a plurality of circumferentially distributed bolts.

As a preferable aspect of the battery pack, the second sealing member includes an O-ring.

As a preferable aspect of the battery pack, the battery pack further includes:

the battery cell module is arranged between the battery cell module and the bottom plate of the battery pack box body.

As a preferable technical solution of the above battery pack, the upper surface of the cold plate is fixed to the lower surface of the cell module by adhesion.

As an optimal technical scheme of the battery pack, the glue for adhering and fixing the cold plate and the battery cell module is heat-conducting glue.

As a preferable technical solution of the above battery pack, the lower surface of the cold plate is fixed to the inner wall of the base plate.

As a preferable technical solution of the battery pack, the glue for adhering and fixing the cold plate and the bottom plate is heat insulation glue.

As a preferable aspect of the battery pack, the battery pack further includes:

a temperature sensor for detecting the temperature of the coolant;

and the circulating pump is used for enabling the cooling liquid to enter the cooling liquid flow channel through one liquid inlet and outlet pipe and enabling the cooling liquid in the cooling liquid flow channel to flow out through the other liquid inlet and outlet pipe.

The utility model has the beneficial effects that: according to the utility model, the first flange plate which is integrally arranged with the connector is arranged on the connector, and the second sealing element is arranged between the first flange plate and the outer wall of the battery pack box body, so that the manufacturing tolerance between the connector and the through hole for penetrating the liquid inlet and outlet pipe on the battery pack box body can be absorbed by the liquid inlet and outlet pipe, and even if the liquid inlet and outlet pipe is inclined due to overlarge manufacturing tolerance, the sealing between the connector and the liquid inlet and outlet pipe is effective only by ensuring, and the position of the connector is not changed, so that the sealing between the first flange plate and the outer wall of the battery pack box body can be effective, and the sealing reliability is improved.

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 view of the connection of an upper cover, a joint and a liquid inlet and outlet pipe provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a heat exchange assembly according to an embodiment of the present invention.

In the figure:

1. a lower box body;

2. a battery cell module; 21. aluminum bars;

31. a heat pipe; 32. a heat conducting plate; 33. a heat-conducting adhesive layer;

4. a liquid inlet and outlet pipe; 41. a second flange plate;

5. a joint; 51. a first flange plate;

6. and (7) covering.

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.

As shown in fig. 1, this embodiment provides a battery pack, including battery pack box, electric core module 2, cold drawing, business turn over liquid pipe 4 and joint 5, wherein, in the battery pack box was located to the cold drawing, be equipped with the coolant liquid runner that is used for circulating the coolant liquid on the cold drawing, battery pack box includes box 1 down, and lower box 1 has the bottom plate, and the cold drawing clamp is located between electric core module 2 and the bottom plate, utilizes the cold drawing to realize the heat transfer between coolant liquid in the coolant liquid runner and electric core module 2. In this embodiment, the upper surface paste of cold board is fixed in the lower surface of electric core module 2, and the lower surface paste of cold board is fixed in the bottom plate inner wall. Preferably, the glue for pasting and fixing the cold plate and the battery cell module 2 is heat-conducting glue, and the glue for pasting and fixing the cold plate and the bottom plate is heat-insulating glue.

The battery pack box body also comprises an upper cover 6, a through hole is arranged on the upper cover 6, one end of the liquid inlet and outlet pipe 4 is communicated with the cooling liquid flow channel, and the other end of the liquid inlet and outlet pipe penetrates out of the through hole, is inserted into the joint 5 and is hermetically connected with the joint through a first sealing element; the joint 5 is connected with a first flange 51 which is integrally arranged with the joint, a second sealing element is arranged between the first flange 51 and the outer wall of the upper cover 6, and the second flange 41 is fixedly connected with the upper cover 6 through a plurality of circumferentially distributed bolts.

In this embodiment, the second sealing member is an O-ring, a sealing groove is provided on the outer wall of the first flange 51 and/or the upper cover 6, and the second sealing member is installed in the sealing groove to seal the contact surface between the first flange 51 and the outer wall of the upper cover 6.

This embodiment is through setting up the first ring flange 51 rather than integrative setting on connecting 5, and set up the second sealing member between the outer wall of first ring flange 51 and upper cover 6, can utilize into drain pipe 4 to absorb its and upper cover 6 on be used for wearing to establish the manufacturing tolerance between the wear-to-establish hole of drain pipe 4, even make the too big manufacturing tolerance and lead to into drain pipe 4 and take place the slope, only need guarantee to connect 5 and business turn over sealed effective between liquid pipe 4, connect 5 positions and do not change, can guarantee that sealed effective between the outer wall of first ring flange 51 and upper cover 6, sealing reliability is improved.

Furthermore, the liquid inlet and outlet pipe 4 is provided with a second flange 41 integrally arranged with the liquid inlet and outlet pipe, and the second flange 41 abuts against the inner wall of the battery pack box body so as to support the upper cover 6 by using the second flange 41, thereby improving the stability of the liquid inlet and outlet pipe 4.

Further, as shown in fig. 2 and 3, the battery pack further includes two heat exchange assemblies, and the two heat exchange assemblies are located on two sides of the battery cell module 2 in the width direction; each heat exchange assembly comprises a plurality of groups of heat pipes 31 which are sequentially distributed at intervals along the length direction of the cell module 2; the upper end fixed connection of every group heat pipe 31 is in the top of electric core module 2, and the lateral wall of electric core module 2 is hugged closely at the middle part of every heat pipe 31, and the lower extreme of every heat exchange assembly's multiunit heat pipe 31 is connected through a heat-conducting plate 32, and heat-conducting plate 32 fixed connection is in the side of cold drawing.

By adopting the heat exchange assembly, the heat exchange with the side surface and the top of the battery cell module 2 is realized by utilizing the heat pipe 31, and the heat exchange with the bottom of the battery cell module 2 is realized by matching with the cold plate, so that the integral heating uniformity of the battery cell module 2 is improved.

Further, the heat-conducting plate 32 is connected in the side of cold drawing through heat-conducting glue paste and forms heat-conducting glue layer 33 to with heat-conducting plate 32 fixed connection in the side of cold drawing, electric core module 2 side is direct to carry out the heat transfer with heat pipe 31, and heat pipe 31 carries out the heat transfer through heat-conducting plate 32, heat-conducting glue layer 33 and cold drawing.

Further, the battery cell module 2 comprises a plurality of battery cell units and a plurality of aluminum bars 21, and the plurality of aluminum bars 21 are electrically connected with the plurality of battery cell units in parallel and/or in series. In order to fixedly connect the upper end of the heat pipe 31 to the top of the cell module 2, a group of heat pipes 31 is provided for each aluminum bar 21, and the upper end of each group of heat pipes 31 is welded to the corresponding aluminum bar 21.

Preferably, each group of heat pipes 31 includes a plurality of heat pipes 31, and by providing a plurality of heat pipes 31, the heat exchange efficiency between the heat pipe 3131 and the cell module 2 is improved.

Further, the battery pack may further include a temperature sensor for detecting a temperature of the coolant to maintain the temperature of the coolant within a desired temperature range.

Further, above-mentioned battery package still includes the circulating pump for make the coolant liquid pass through one and advance drain pipe 4 and get into in the coolant liquid runner, and make the coolant liquid in the coolant liquid runner pass through another and advance drain pipe 4 outflow, in order to improve the temperature homogeneity of electric core module 2.

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 comprises a battery pack box body, a cold plate, a liquid inlet and outlet pipe (4) and a connector (5), wherein the cold plate is arranged in the battery pack box body, a cooling liquid flow channel for circulating cooling liquid is arranged on the cold plate, one end of the liquid inlet and outlet pipe (4) is communicated with the cooling liquid flow channel, and the other end of the liquid inlet and outlet pipe penetrates out of the battery pack box body and is spliced with the connector (5) and hermetically connected with the connector through a first sealing element; it is characterized in that the preparation method is characterized in that,

the connector (5) is connected with a first flange (51) which is integrally arranged with the connector, and a second sealing element is arranged between the first flange (51) and the outer wall of the battery pack box body.

2. The battery pack according to claim 1, wherein the liquid inlet and outlet pipe (4) is provided with a second flange (41) integrally formed therewith, and the second flange (41) abuts against the inner wall of the battery pack case.

3. A battery pack according to claim 1, wherein the second flange (41) is fixedly attached to the battery pack housing by a plurality of circumferentially distributed bolts.

4. The battery pack of claim 1, wherein the second seal comprises an O-ring seal.

5. The battery pack of claim 1, further comprising:

the battery cell module (2), the cold plate presss from both sides and locates battery cell module (2) with between the bottom plate of battery package box.

6. The battery pack according to claim 5, wherein the upper surface of the cold plate is adhesively fixed to the lower surface of the cell module (2).

7. The battery pack according to claim 6, wherein the glue for adhering and fixing the cold plate and the cell module (2) is a heat-conducting glue.

8. The battery pack of claim 5, wherein the lower surface of the cold plate is adhesively secured to the inner wall of the base plate.

9. The battery pack of claim 8, wherein the adhesive securing the cold plate to the base plate is a thermally insulating adhesive.

10. The battery pack of claim 1, further comprising:

a temperature sensor for detecting the temperature of the coolant;

and the circulating pump is used for enabling the cooling liquid to enter the cooling liquid flow channel through one liquid inlet and outlet pipe (4) and enabling the cooling liquid in the cooling liquid flow channel to flow out through the other liquid inlet and outlet pipe (4).