CN220400712U

CN220400712U - Communication plate, heat exchange assembly, battery pack and vehicle

Info

Publication number: CN220400712U
Application number: CN202321675442.7U
Authority: CN
Inventors: 邱阳; 张宁
Original assignee: Weilai Battery Technology Anhui Co ltd
Current assignee: Weilai Battery Technology Anhui Co ltd
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2024-01-26
Anticipated expiration: 2033-06-28

Abstract

The utility model relates to the technical field of battery temperature regulation, in particular to a communication plate, a heat exchange assembly, a battery pack and a vehicle, and aims to solve the problem that the communication plate matched with a heat exchange plate with a smaller thickness is difficult to process. For this purpose, the communication plate is connected with a heat exchange plate, the heat exchange plate is provided with a heat exchange channel, the communication plate comprises a connecting piece and a matching piece, the connecting piece is provided with a communication cavity, and one end of the communication cavity along a first direction is provided with an opening; the fitting piece is connected with the connecting piece, and at least a portion sets up in the opening part of intercommunication chamber, and the fitting piece is provided with the mating hole along first direction, mating hole and intercommunication chamber intercommunication, when the heat exchange plate sets up in the mating hole, the heat transfer passageway and the intercommunication chamber intercommunication of heat exchange plate. The depth of seting up of mating holes in first direction is littleer, and the cutter intensity of most lathe can satisfy the processing requirement now to reduce the degree of difficulty and the cost of processing mating holes.

Description

Communication plate, heat exchange assembly, battery pack and vehicle

Technical Field

The utility model relates to the technical field of battery temperature regulation, and particularly provides a communication plate, a heat exchange assembly, a battery pack and a vehicle.

Background

In the development of new energy vehicles, batteries are a very important link. Along with the gradual increase of the battery pack capacity, the quantity of the battery monomers is increased, the battery monomers can release heat in the charge and discharge process, and along with the accumulation of the heat, the safety and the reliability of the battery pack are greatly reduced. Therefore, it is necessary to remove heat from the battery in a timely manner.

There are two ways of heat dissipation of the battery, one is to utilize the gas in the battery pack to expand due to heat, and to discharge a part of hot gas out of the battery pack. The other is that a heat exchange component is arranged in the battery pack, a plurality of heat exchange channels are arranged in the heat exchange component, heat exchange media with lower temperature are introduced into the heat exchange channels, and the temperature in the battery pack is reduced in a heat exchange mode, so that the safety and reliability of the battery pack are guaranteed.

The heat exchange assembly comprises a heat exchange plate and two communicating plates, wherein the two communicating plates are respectively connected to two ends of the heat exchange plate. The heat exchange plate is arranged between the battery monomers, and a plurality of heat exchange channels are arranged in the first direction in the heat exchange plate. The first direction is the length direction of the heat exchange plate. The slot is arranged in the communication plate, the slot is arranged along the first direction, one end of the slot is provided with an opening, and one end of the heat exchange plate is inserted into the slot of the communication plate along the first direction and then welded with the communication plate. One side of the communication plate, which is far away from the heat exchange plate, is provided with a pipeline joint, and the pipeline joint is communicated with the slot. The heat exchange medium enters from the pipeline joint of one communication plate, sequentially passes through the communication plate, the heat exchange plate and the other communication plate, and then flows out from the pipeline joint of the other communication plate to cool the battery monomer close to the heat exchange plate.

With the continuous development of battery technology, the intervals between the battery cells are smaller and smaller, so that the energy density of the battery pack is improved, and the capacity of the battery pack placed in a limited space is increased. At present, the thickness of the heat exchange plate can be controlled below 3.5 mm. For the communicating plate, a slot with the width matched with the thickness of the heat exchange plate is required to be arranged on the communicating plate, and the depth of the slot along the first direction is required to be larger than the insertion depth of the end part of the heat exchange plate, so that a part of space can be reserved in the slot for communicating the heat exchange channel of the heat exchange plate, and the reliability of the communication between the heat exchange plate and the communicating plate is ensured. Typically, the depth of the slot is above 10 mm. In the process of machining deep grooves, the longer the groove depth is, the lower the strength is, especially for deep grooves with a narrower width, the longer the tool required for machining. Therefore, most of the machining tools at present are difficult to meet the machining requirements of the slots, and the communication plates are difficult to match with the heat exchange plates with thinner widths. The width of the slot is too large, so that the gap between the heat exchange plate and the communication plate is too large, welding is difficult, and sealing problem is easy to occur.

Therefore, there is a need for a communication plate, a heat exchange assembly, a battery pack and a vehicle to solve the problem of difficult processing of the communication plate matched with the heat exchange plate with a thinner thickness.

Disclosure of Invention

The utility model aims to solve the technical problems, namely the problem of high processing difficulty of the communication plate matched with the heat exchange plate with a thinner thickness.

In a first aspect, the present utility model provides a communication plate connected to a heat exchange plate, the heat exchange plate being provided with heat exchange channels, the communication plate comprising: the connecting piece is provided with a communication cavity, and one end of the communication cavity along the first direction is provided with an opening; the matching piece is connected with the connecting piece, at least one part of the matching piece is arranged at the opening of the communication cavity, the matching piece is provided with a matching hole along the first direction, the matching hole is communicated with the communication cavity, and when the heat exchange plate is arranged in the matching hole, the heat exchange channel of the heat exchange plate is communicated with the communication cavity.

In a specific embodiment of the above communication plate, the connecting member is provided with a first limiting portion configured to abut against the mating member along the first direction.

In a specific embodiment of the above communication plate, the first limiting portion is disposed on an inner side surface of the connecting member near the mating member.

In a specific embodiment of the above communication plate, the length of the mating hole in the second direction is 1mm to 3mm; and/or the length of the mating hole along the first direction is 2mm to 6mm.

In a specific embodiment of the above communication plate, the end of the mating hole facing away from the connecting piece in the first direction is provided with a first chamfer.

In a specific embodiment of the above communication plate, the fitting is provided with a second limiting portion configured to abut against the heat exchange plate along the first direction.

In a specific embodiment of the above communication plate, the second limiting portion is disposed on an inner side surface of the fitting member, which is close to the heat exchange plate.

In a second aspect, the present utility model provides a heat exchange assembly comprising: a communication plate as described above; the end of the heat exchange plate is arranged in the matching hole of the matching piece.

In a third aspect, the present utility model provides a battery pack comprising: a battery cell provided with a plurality of rows; the heat exchange assembly is positioned between two adjacent rows of battery cells.

In a fourth aspect, the present utility model provides a vehicle comprising: a frame; the battery pack is arranged on the frame.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a communication plate which is connected with a heat exchange plate, wherein the heat exchange plate is provided with a heat exchange channel, the communication plate comprises a connecting piece and a matching piece, the connecting piece is provided with a communication cavity, and one end of the communication cavity along a first direction is provided with an opening; the fitting piece is connected with the connecting piece, and at least a portion sets up in the opening part of intercommunication chamber, and the fitting piece is provided with the mating hole along first direction, mating hole and intercommunication chamber intercommunication, when the heat exchange plate sets up in the mating hole, the heat transfer passageway and the intercommunication chamber intercommunication of heat exchange plate. The tip of heat exchange plate can pass the mating holes in first direction for mating holes's length in first direction can be less than the first direction of heat exchange plate tip and insert the degree of depth, consequently, the mating holes offer the degree of depth in first direction littleer, and the cutter intensity of most lathe can satisfy the processing requirement now, thereby reduces the degree of difficulty and the cost of processing mating holes.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a heat exchange assembly according to the present utility model;

FIG. 2 is a schematic cross-sectional view of a heat exchange assembly according to the present utility model;

FIG. 3 is a schematic view of another angular cross-sectional structure provided by the present utility model;

FIG. 4 is an enlarged view at section A in FIG. 3;

fig. 5 is a schematic cross-sectional view of another heat exchange assembly according to the present utility model.

Reference numerals illustrate:

1. a communication plate; 11. a connecting piece; 111. a communication chamber; 1111. an opening; 112. a pipe; 113. a first limit part; 12. a mating member; 121. a mating hole; 1211. a first chamfer; 1212. a second chamfer; 122. a first abutting portion; 123. a second limit part; 2. a heat exchange plate; 21. a second abutting portion; x, a first direction; y, second direction.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. 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.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

The utility model provides a heat exchange assembly, which aims to solve the problem that the conventional communication plate is difficult to be matched with a heat exchange plate with a smaller thickness. As shown in fig. 1, the heat exchange assembly comprises a communication plate 1 and a heat exchange plate 2, wherein the communication plate 1 is connected to two ends of the heat exchange plate 2, one side of the communication plate 1, which is away from the heat exchange plate 2, is communicated with a main pipeline, and a plurality of heat exchange channels are arranged in the heat exchange plate 2. The main pipeline communicated with the communicating plate 1 comprises a main liquid inlet pipeline and a main liquid outlet pipeline. The heat exchange medium can enter one of the communication plates 1 from the main liquid inlet pipe, then flows through the heat exchange plate 2, and flows out from the other communication plate 1 and then enters the main liquid outlet pipe, so that the temperature of the heat exchange plate 2 is regulated, and the heat exchange plate 2 can cool or heat surrounding components.

As shown in fig. 1 to 4, the communication plate 1 includes a connector 11 and a mating member 12, a communication chamber 111 is provided in the connector 11, and an opening 1111 is provided at one end of the communication chamber 111 in the first direction X. The fitting 12 is connected to the connecting member 11, and at least a portion of the fitting 12 is disposed at the opening 1111 of the communication chamber 111 and remains sealed with the connecting member 11. The fitting 12 is provided with a fitting hole 121 in the first direction X, the fitting hole 121 is provided in communication with the communication chamber 111, one end of the heat exchange plate 2 is inserted into the fitting hole 121, and the heat exchange plate 2 can be sealed with the fitting 12, so that the heat exchange passage of the heat exchange plate 2 can communicate with the communication chamber 111. The fitting piece 12 is arranged between the connecting piece 11 and the heat exchange plate 2, so that the length of the communication cavity 111 of the connecting piece 11 along the second direction Y is set larger, and the processing difficulty and the processing cost of the connecting piece 11 are reduced. The length of the fitting hole 121 provided on the fitting 12 in the second direction Y is fitted with the thickness of the end portion of the heat exchange plate 2, and the end portion of the heat exchange plate 2 can pass through the fitting hole 121 in the first direction X, so that the length of the fitting hole 121 in the first direction X can be lower than the insertion depth of the end portion of the heat exchange plate 2 in the first direction X. Compared with the prior art that the depth of the slot on the communication plate 1 along the first direction X is larger than the insertion depth of the end part of the heat exchange plate 2 along the first direction X, the depth of the matching hole 121 in the first direction X is smaller, and the strength of the tool of most machine tools can meet the processing requirement, so that the difficulty and cost for processing the matching hole 121 are greatly reduced.

The first direction X is the length direction of the heat exchange plate 2, and the second direction Y is the thickness direction of the heat exchange plate 2.

The heat exchanger plate 2, the connecting member 11 and the mating member 12 are all made of aluminum. Specifically, the heat exchange plate 2 adopts 3 series aluminum profiles. The 3 series section aluminum is aluminum alloy with manganese as a main alloy element, and has good plasticity, good corrosion resistance and good welding performance. The connecting piece 11 and the matching piece 12 are made of 6 series aluminum profiles. The 3 series section aluminum is an aluminum alloy with magnesium and silicon as main alloy elements, and has higher strength, toughness and corrosion resistance and good processing performance.

Laser welding is used between the connecting piece 11 and the mating piece 12 to achieve sealing. Induction high frequency welding is adopted between the matching piece 12 and the heat exchange plate 2 to realize sealing. After the heat exchange plate 2 is inserted into the fitting 12 from the fitting hole 121, the welding area of the heat exchange plate 2 and the fitting 12 is the inner peripheral surface of the fitting hole 121. The length of the fitting hole 121 along the first direction X is 2mm to 6mm, specifically 5mm, to ensure that the fitting 12 and the heat exchange plate 2 have a sufficient welding area, and to improve the welding strength of the fitting 12 and the heat exchange plate 2.

Specifically, the length of the mating hole 121 along the second direction Y is 1mm to 3.5mm, and the thickness of the heat exchange plate 2 in the second direction Y is equal to the length of the mating hole 121 in the second direction Y, so that the heat exchange plate 2 can be inserted into the mating hole 121, thereby matching the heat exchange plate 2 with a thinner thickness.

The end of the mating hole 121 facing away from the connecting piece 11 in the first direction X is provided with a first chamfer 1211, which on the one hand reduces the stress of the mating piece 12 at the end of the mating hole 121 and on the other hand also makes it easier to insert the heat exchanger plate 2 into the mating hole 121 along the chamfer. The end of the mating hole 121 facing away from the heat exchanger plate 2 in the first direction X is provided with a second chamfer 1212, mainly for reducing the stress of the mating element 12 there. In the example of the present utility model, the first chamfer 1211 is a beveled chamfer and the second chamfer 1212 is a rectangular chamfer. Of course, in other embodiment examples, the first chamfer 1211 and the second chamfer 1212 may also employ other types of chamfers.

The connecting piece 11 is provided with a duct 112 at one end facing away from the fitting piece 12 in the first direction X, one end of the duct 112 being in communication with the communication chamber 111 and the other end being in communication with the total feed or discharge duct, so that the heat exchange medium can enter the communication chamber 111 from the duct 112 or be discharged from the duct 112 via the communication chamber 111.

The connecting piece 11 is provided with a first limiting portion 113, specifically, the first limiting portion 113 is disposed on an inner side surface of the connecting piece 11, which is close to the mating piece 12, and the first limiting portion 113 is configured in a stepped shape. The fitting 12 has a first abutting portion 122 on its peripheral surface, which engages with the first stopper portion 113. As the mating member 12 is inserted into the communication chamber 111 from the opening 1111 of the communication chamber 111 in the first direction X, the first abutting portion 122 can contact the first limiting portion 113 to position the mating member 12, ensuring that the connecting member 11 and the mating member 12 are mounted in place. In the present embodiment, the first abutting portion 122 is an end portion of the mating member 12.

It should be noted that, although the first limiting portion 113 is disposed on the inner side surface of the connecting member 11 near the mating member 12 and is configured to be stepped in the present utility model, this is not a specific limitation of the present utility model, and in other embodiments, the first limiting portion 113 may be disposed on other positions of the connecting member 11, such as the end portion or the outer side surface of the connecting member 11, and may abut against the mating member 12 in the first direction X to position the mating member 12 by a person skilled in the art without departing from the principles of the present utility model.

The fitting 12 is provided with a second limiting portion 123, specifically, the second limiting portion 123 is disposed on an inner side surface of the fitting 12, which is close to the heat exchange plate 2, and the second limiting portion 123 is disposed in a stepped shape. The end of the heat exchange plate 2 is provided with a second abutment portion 21 that mates with the second limiting portion 123. As the heat exchange plate 2 is inserted into the fitting hole 121 in the first direction X, the second abutment portion 21 can contact the second limiting portion 123 to position the heat exchange plate 2, ensuring that the fitting 12 and the heat exchange plate 2 are mounted in place.

It should be noted that, although the second limiting portion 123 is disposed on the inner side surface of the mating member 12 near the heat exchange plate 2 and is configured in a stepped shape, this is not a specific limitation of the present utility model, and in other embodiments, the person skilled in the art may dispose the second limiting portion 123 on other positions of the mating member 12, such as the end portion or the outer side surface of the mating member 12, and may abut against the heat exchange plate 2 in the first direction X to position the heat exchange plate 2 without departing from the principles of the present utility model.

In some embodiments, two communication plates 1 are provided, one end of the communication plate 1 being connected to the heat exchange plate 2, the other end being in communication with the total inlet or outlet pipe via a pipe 112 to enable the heat exchange medium to enter and exit the heat exchange assembly.

In other embodiments, the communication plate 1 comprises two types, one type of communication plate 1 being arranged at both ends of the heat exchange assembly, one end of the type of communication plate 1 being connected to the heat exchange plate 2 and the other end being in communication with the total inlet or outlet pipe via a pipe 112 to enable the heat exchange medium to enter and exit the heat exchange assembly. The other type of communication plate 1 is arranged at the middle part of the heat exchange assembly, openings 1111 are formed at two ends of a connecting piece 11 in the type of communication plate 1, a matching piece 12 is arranged at two openings 1111, two ends of the communication plate 1 are connected with the heat exchange plates 2 to connect and communicate the two heat exchange plates 2, and accordingly the total length of the heat exchange assembly is improved.

In summary, the mounting steps of the heat exchange assembly provided in this embodiment are as follows:

first, the mating member 12 is inserted into the connecting member 11 along the first direction X, so that the mating member 12 is placed at the opening 1111 of the communication cavity 111 until the first abutting portion 122 abuts against the first limiting portion 113 to limit, and the mating member 12 and the connecting member 11 are welded by laser welding to fix and seal the mating member 12 and the connecting member 11.

And then, one end of the heat exchange plate 2 is inserted into the matching hole 121 of the matching piece 12 along the first direction X until the second abutting part 21 abuts against the second limiting part 123 to limit, and the matching piece 12 and the heat exchange plate 2 are welded by adopting induction high-frequency welding so as to fix and seal the matching piece 12 and the heat exchange plate 2.

In addition, the utility model also provides a vehicle which comprises a frame and a battery pack, wherein the battery pack is arranged on the frame. The battery pack comprises the heat exchange assembly and a plurality of battery monomers, wherein the battery monomers are arranged in a plurality of rows, and the heat exchange assembly is located between two adjacent rows of battery monomers. The heat exchange component can be filled with heat exchange medium, and the temperature in the battery pack is changed in a heat exchange mode so as to adjust the ambient temperature around the battery monomers. Specifically, when the temperature of the battery pack is higher, the temperature of the heat exchange medium introduced into the heat exchange assembly is lower, and when the heat exchange medium flows through the heat exchange plate 2, the temperature of the heat exchange plate 2 can be reduced, so that the battery monomer in the battery pack is cooled, and the temperature of the battery monomer is prevented from being too high. When the temperature of the battery pack is lower, the temperature of the heat exchange medium introduced into the heat exchange assembly is lower, and when the heat exchange medium flows through the heat exchange plate 2, the temperature of the heat exchange plate 2 can be increased, so that the battery monomer in the battery pack is heated, and the battery monomer can be at a proper working temperature, so that the service performance of the battery pack at a low temperature is improved.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims

1. A communication plate connected with a heat exchange plate provided with heat exchange channels, characterized in that the communication plate (1) comprises:

a connecting piece (11) provided with a communication cavity (111), wherein one end of the communication cavity (111) along a first direction is provided with an opening;

fitting piece (12), it with connecting piece (11) connect, and at least a portion set up in the opening part of intercommunication chamber (111), fitting piece (12) are followed first direction is provided with mating holes (121), mating holes (121) with intercommunication chamber (111) communicate, works as the heat exchange plate set up in mating holes (121), the heat exchange channel of heat exchange plate with intercommunication chamber (111).

2. The communication plate according to claim 1, wherein the connecting piece (11) is provided with a first limiting portion (113), the first limiting portion (113) being configured to abut the mating piece (12) in the first direction.

3. The communication plate according to claim 2, wherein the first limiting portion (113) is provided on an inner side surface of the connecting member (11) near the mating member (12).

4. The communication plate according to claim 1, wherein the mating hole (121) has a length in the second direction of 1mm to 3mm; and/or the length of the fit hole (121) along the first direction is 2mm to 6mm.

5. The communication plate according to claim 1, characterized in that the end of the mating hole (121) facing away from the connecting piece (11) in the first direction is provided as a first chamfer.

6. The communication plate according to claim 1, wherein the mating element (12) is provided with a second limiting portion (123), the second limiting portion (123) being configured to abut the heat exchanger plate in the first direction.

7. A communication plate according to claim 6, wherein the second limiting portion (123) is provided at an inner side surface of the fitting (12) close to the heat exchanger plate.

8. A heat exchange assembly, comprising:

the communication plate according to any one of claims 1 to 7;

and a heat exchange plate (5) whose end is disposed in the fitting hole (121) of the fitting (12).

9. A battery pack, comprising:

a battery cell provided with a plurality of rows;

the heat exchange assembly of claim 8, located between two adjacent rows of said cells.

10. A vehicle, characterized by comprising:

a frame;

the battery pack of claim 9, disposed on the frame.