CN218677302U - Liquid cooling battery box and power battery - Google Patents

Abstract

The utility model discloses a liquid cooling battery box and power battery, this liquid cooling battery box includes liquid cooling board and case lid, and the liquid cooling board includes liquid cooling board body and closing plate, is equipped with the runner in the liquid cooling board body, and the runner includes interval distribution's liquid cooling runner and heat conduction runner, and closing plate sealing connection is around the liquid cooling board body and seals the runner, and the heat conduction runner intussuseption is filled with phase change material, and the coupling of liquid cooling runner sets up in the up end of liquid cooling board body along thickness direction; the case lid is located the liquid cooling board, and the coupling is located the chamber that holds that case lid and liquid cooling board formed outside. This liquid cooling battery box avoids because the problem that the thickness of the liquid cooling board body that the coupling leads to increases, to bearing the battery module of same volume and weight size, can reduce the thickness of liquid cooling board body to reduce volume, weight and the manufacturing cost of liquid cooling board body, and can avoid because the risk that the liquid cooling board that liquid cooling runner and heat conduction runner leaked and cause became invalid, improved the performance of liquid cooling board.

Description

Liquid cooling battery box and power battery

Technical Field

The utility model relates to a power battery technical field especially relates to liquid cooling battery box and power battery.

Background

The heat management system is one of important components of the power battery system, and can ensure that the power battery system works in a proper temperature range, so that the working performance and reliability of the power battery system are ensured, wherein the power battery system mainly comprises a liquid cooling battery box, a battery module arranged in the liquid cooling battery box and the like.

At present, the mode for carrying out heat management on the power battery in the prior art mainly adopts a liquid cooling mode, a liquid cooling plate is adopted as a box body of a liquid cooling battery box, a battery module is arranged on the liquid cooling plate, and the temperature of the battery module is adjusted through the liquid cooling plate, so that the power battery is ensured to work within a proper temperature range. The liquid cooling plate comprises an upper plate wall, a lower plate wall and a circumferential side wall, wherein a liquid cooling pipe is arranged in the liquid cooling plate, a battery module is arranged on the upper plate wall of the liquid cooling plate, but a liquid inlet joint and a liquid outlet joint of the liquid cooling pipe are both arranged on the circumferential side wall of the liquid cooling plate; secondly, the liquid-cooled battery box has poor sealing between the box body and the box cover.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid cooling battery box and power battery to the liquid inlet joint and the liquid outlet joint of the liquid cooling pipe of solving among the prior art all set up in the circumference lateral wall of liquid cooling board, lead to the bulky of liquid cooling board, weight is heavy and manufacturing cost is high, and the poor problem of leakproofness between the box of liquid cooling battery box and the case lid.

To achieve the purpose, the utility model adopts the following technical proposal:

liquid cooling battery box, it includes:

the liquid cooling plate comprises a liquid cooling plate body and a sealing plate, a flow channel is arranged in the liquid cooling plate body and comprises a liquid cooling flow channel and a heat conduction flow channel which are distributed at intervals, the sealing plate is connected to the periphery of the liquid cooling plate body in a sealing mode and seals the flow channel, a phase change material is filled in the heat conduction flow channel, and a pipe joint of the liquid cooling flow channel is arranged on the upper end face of the liquid cooling plate body in the thickness direction;

the case lid, the case lid is located the liquid cooling board, just the coupling is located the case lid with the chamber is held outside the chamber that the liquid cooling board formed.

Preferably, the sealing plate comprises two L-shaped first sealing plates, the two first sealing plates are distributed at intervals on two sides of the liquid cooling plate body along a first direction, and the first direction is perpendicular to the thickness direction of the liquid cooling plate body;

the first sealing plate comprises a sealing part and a connecting part which are vertically distributed and connected, the sealing part is welded with the liquid cooling plate body and seals the flow channel, and the connecting part is connected with the box cover.

Preferably, the sealing plate further comprises two second sealing plates with rectangular cross sections, the two second sealing plates are distributed on two sides of the liquid cooling plate body at intervals along a second direction, the second sealing plates are welded with the liquid cooling plate body and seal the flow channel, the second sealing plates are further connected with the box cover, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the liquid cooling plate body.

Preferably, the second sealing plate is further provided with lightening holes extending along the length direction thereof.

Preferably, the thickness of the second sealing plate is greater than that of the liquid cooling plate body, and the upper end face of the first sealing plate and the upper end face of the second sealing plate are flush with the upper end face of the liquid cooling plate body.

Preferably, the number of the pipe joints is two, and the two pipe joints are arranged on the upper end face of the liquid cooling plate body along the thickness direction at intervals;

the pipe joint comprises a connecting pipe and a conical head, and two ends of the connecting pipe are respectively communicated with the liquid cooling flow channel and the large end of the head.

Preferably, the liquid cooling battery box further comprises a plurality of connecting assemblies, and the connecting assemblies are distributed at intervals along the circumferential direction of the box cover;

the connecting assembly comprises a rivet nut and a sealing element, the rivet nut comprises a flange and a rivet body connected with the flange, the diameter of the flange is larger than that of the rivet body, the sealing element is arranged between the flange and the box cover, and the rivet body is used for connecting the sealing plate and the box cover.

Preferably, the liquid cooling plate body, the liquid cooling runner and the heat conducting runner are integrally formed by aluminum materials in an injection molding mode.

Preferably, at least a portion of the liquid cooling plate body contacting the battery module is coated with an insulating material.

The power battery comprises the liquid cooling battery box and a battery module, wherein the battery module is arranged in the accommodating cavity formed by the liquid cooling plate and the box cover.

The utility model has the advantages that:

an object of the utility model is to provide a liquid cooling battery box and power battery, wherein, this liquid cooling battery box inputs the coolant liquid in to the liquid cooling runner through the coupling, and heat conduction runner intussuseption is filled with phase change material, and when battery module during operation, the heat that the regulation battery module produced is absorbed jointly to the phase change material in the coolant liquid in the liquid cooling runner and the heat conduction runner for the battery module can carry out work in normal temperature range, has improved the working property and the life of battery module. The pipe joint is arranged on the upper end face of the liquid cooling plate body in the thickness direction, so that the problem that the thickness of the liquid cooling plate body is increased due to the pipe joint can be effectively solved, and the thickness of the liquid cooling plate body can be effectively reduced for a battery module bearing the same size and weight, so that the size, the weight and the production cost of the liquid cooling plate body are reduced, and the pipe joint is positioned outside a containing cavity formed by the liquid cooling plate and a box cover and can ensure that cooling liquid is normally conveyed into a liquid cooling runner; secondly, through setting up closing plate sealing connection around the liquid cooling board body to this internal runner of liquid cooling board seals this internally in the liquid cooling board, avoids the risk of the liquid cooling board inefficacy because liquid cooling runner and heat conduction runner leak and cause, has improved the performance of liquid cooling board.

Drawings

Fig. 1 is a schematic structural diagram of a liquid-cooled battery box according to an embodiment of the present invention;

fig. 2 is an exploded view of a liquid-cooled battery box according to an embodiment of the present invention;

fig. 3 is a schematic view of a part of the liquid-cooled battery box according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first sealing member of a liquid-cooled battery box according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a pipe joint of a liquid-cooled battery box according to an embodiment of the present invention.

In the figure:

1. a liquid-cooled plate; 11. a liquid-cooled plate body; 111. a pipe joint; 1111. a connecting pipe; 1112. a head portion; 112. a liquid cooling flow passage; 113. a heat conducting flow channel; 12. a sealing plate; 121. a first sealing plate; 1211. a connecting portion; 1212. a sealing part; 122. a second sealing plate; 1221. lightening holes;

2. a connecting assembly is provided.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The utility model provides a liquid cooling battery box, as shown in fig. 1-3, this liquid cooling battery box includes liquid cooling board 1 and case lid (not shown in the figure), liquid cooling board 1 includes liquid cooling board body 11 and closing plate 12, be equipped with interval distribution's liquid cooling runner 112 and heat conduction runner 113 in the liquid cooling board body 11, closing plate 12 is connected around liquid cooling board body 11 and seals liquid cooling runner 112 and heat conduction runner 113 in a sealing manner, heat conduction runner 113 is filled with phase change material, the coupling 111 of liquid cooling runner 112 sets up in the up end of liquid cooling board body 11 along the thickness direction; the cover of the case is covered on the liquid cooling plate 1, and the pipe joint 111 is located outside the accommodating cavity formed by the case cover and the liquid cooling plate 1.

This liquid cooling battery box, as shown in fig. 1-3, through inputing the coolant liquid in liquid cooling runner 112, heat conduction runner 113 intussuseption is filled with phase change material, and when working the battery module, the heat that adjusts battery module and distribute is absorbed jointly to the coolant liquid in liquid cooling runner 112 and the phase change material in heat conduction runner 113 for the battery module can work in normal temperature range, has improved the working property and the life of battery module. The pipe joint 111 is arranged on the upper end face of the liquid cooling plate body 11 in the thickness direction, so that the problem that the thickness of the liquid cooling plate body 11 is increased due to the pipe joint 111 can be effectively solved, and it can be understood that for a battery module bearing the same size and weight, the thickness of the liquid cooling plate body 11 can be effectively reduced, so that the size, the weight and the production cost of the liquid cooling plate body 11 are reduced, and the pipe joint 111 is positioned outside a containing cavity formed by the liquid cooling plate 1 and a box cover, so that the normal conveying of cooling liquid into the liquid cooling flow channel 112 can be guaranteed; secondly, through setting up sealing plate 12 sealing connection in liquid cooling plate body 11 around to seal the runner in liquid cooling plate body 11, avoid the risk of the liquid cooling plate 1 inefficacy that causes because liquid cooling runner 112 and heat conduction runner 113 leak, improved the performance of liquid cooling plate 1.

Specifically, the liquid cooling plate body 11 is integrally injection-molded with the liquid cooling flow passage 112 and the heat conduction flow passage 113 by aluminum material. So set up, can reduce the quantity of spare part, and can guarantee the structural strength of liquid cooling board body 11, and the liquid cooling board body 11's made by the aluminum product light in weight. It is understood that other metal materials can be used to form the liquid cooling plate body 11 according to the requirement.

Further specifically, at least a portion of the liquid cooling plate body 11, which is in contact with the battery module, is coated with an insulating material. With such an arrangement, the usability of the liquid cooling plate body 11 can be further improved.

As shown in fig. 1 to 4, the sealing plate 12 includes two L-shaped first sealing plates 121, the two first sealing plates 121 are distributed at intervals on two sides of the liquid cooling plate body 11 along a first direction, and the first direction is perpendicular to the thickness direction of the liquid cooling plate body 11; the first sealing plate 121 includes a sealing portion 1212 and a connecting portion 1211 which are vertically distributed and connected, the sealing portion 1212 is welded to the liquid cooling plate body 11 and closes the flow passage, and the connecting portion 1211 is connected to the tank cover. By arranging the first sealing plate 121 to be L-shaped, compared with the rectangular solid sealing plate 12, the weight of the first sealing plate 121 is effectively reduced, so that the weight of the liquid cooling plate 1 is further reduced; next, the first sealing plate 121 is disposed in an L shape, the sealing portion 1212 and the connecting portion 1211 are vertically distributed and connected, the sealing portion 1212 is welded to the liquid cooling plate body 11 to seal the flow channel in the liquid cooling plate body 11, in this embodiment, the liquid cooling flow channel 112 and the heat conducting flow channel 113 are exemplarily disposed at intervals along the second direction, the sealing portion 1212 is welded to the liquid cooling plate body 11 to seal the liquid cooling flow channel 112 and the heat conducting flow channel 113 in the liquid cooling plate body 11, and the case cover is connected to the connecting portion 1211 of the first sealing plate 121 to define a disposition position of the case cover disposed on the liquid cooling plate 1. Specifically, in the present embodiment, the plate surface of the connecting portion 1211 of the first sealing plate 121 is flush with the upper end surface of the liquid cooling plate body 11.

As shown in fig. 1 to 3, the sealing plate 12 further includes two second sealing plates 122 with rectangular cross sections, the two second sealing plates 122 are distributed on two sides of the liquid cooling plate body 11 along a second direction, the second sealing plates 122 are welded to the liquid cooling plate body 11 and seal the flow channel, the second sealing plates 122 are further connected to the box cover, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the liquid cooling plate body 11. The section of the second sealing plate 122 is rectangular, and the first side wall of the second sealing plate 122 is welded with the liquid cooling plate body 11, so that the first sealing plate 121 and the second sealing plate 122 jointly seal the flow channel, in this embodiment, the flow channels at the two ends of the liquid cooling plate body 11 along the second direction are the liquid cooling flow channel 112 and the heat conducting flow channel 113, for example, and the two second sealing plates 122 seal the liquid cooling flow channel 112 and the heat conducting flow channel 113 in the liquid cooling plate body 11; the second side wall of the second sealing plate 122 is connected with the case cover to limit the position of the case cover, so that the battery module is located in the accommodating cavity formed by the case cover and the liquid cooling plate 1; the third side wall of the second sealing plate 122 is used for being connected with a platform for supporting the liquid-cooled battery box from the outside, wherein the second side wall and the third side wall are two opposite and spaced side walls of the second sealing plate 122 along the thickness direction, and the thickness direction of the second sealing plate 122 is parallel to the thickness direction of the liquid-cooled plate 1; second, the second sealing plate 122 has a rectangular cross section, and the sealing plate 12 having a rectangular cross section has good support stability.

In this embodiment, the first direction is a length direction of the liquid cooling plate body 11, and the second direction is a width direction of the liquid cooling plate body 11. Alternatively, the first direction may be a width direction of the liquid cooling plate body 11, and the second direction is a length direction of the liquid cooling plate body 11.

Specifically, as shown in FIGS. 1-3, second seal plate 122 is also provided with lightening holes 1221 extending along its length. With this arrangement, the weight of the second seal plate 122 can be reduced, thereby further reducing the weight of the liquid-cooling plate 1.

Further specifically, as shown in fig. 1 to 3, the thickness of the second sealing plate 122 is greater than the thickness of the liquid-cooled plate body 11, and the upper end surface of the first sealing plate 121 and the upper end surface of the second sealing plate 122 are flush with the upper end surface of the liquid-cooled plate body 11. Due to the arrangement, the lower end face of the liquid cooling plate body 11 in the thickness direction is suspended, so that the heat dissipation performance of the liquid cooling plate 1 can be further improved, and the performance of adjusting the temperature of the battery module through the liquid cooling plate 1 can be further improved; secondly, the upper end face of the first sealing plate 121 and the upper end face of the second sealing plate 122 are flush with the upper end face of the liquid cooling plate body 11, the area of the upper end face of the liquid cooling plate 1 can be enlarged, and the box cover is conveniently connected to the first sealing plate 121 and the second sealing plate 122.

As shown in fig. 1, 2 and 5, the number of the pipe joints 111 is two, and the two pipe joints 111 are arranged on the upper end surface of the liquid cooling plate body 11 along the thickness direction at intervals; the pipe joint 111 includes a connection pipe 1111 and a tapered head 1112, and both ends of the connection pipe 1111 are respectively communicated with the liquid cooling flow passage 112 and the large end of the head 1112. Specifically, the two pipe joints 111 are a liquid inlet pipe joint and a liquid outlet pipe joint, respectively, both of which are communicated with a coolant source, and the coolant source delivers coolant to the liquid cooling flow passage 112 through the liquid inlet pipe joint. The head 1112 of the pipe joint 111 is conical, and the conical head 1112 can buffer the speed of the cooling liquid entering the liquid-cold runner 112 and the speed of the cooling liquid in the liquid-cold runner 112 to be discharged, so that the retention time of the cooling liquid in the liquid-cold runner 112 can be prolonged, and the performance of adjusting the temperature of the battery module through the liquid-cold plate 1 is further improved; secondly, the tapered shape of the head 1112 of the pipe joint 111 also facilitates the connection of the pipe joint 111 to a pipe of a coolant source.

As shown in fig. 1 to 4, the liquid-cooled battery box further includes a plurality of connecting assemblies 2, and the plurality of connecting assemblies 2 are distributed at intervals along the circumferential direction of the box cover; the connecting assembly 2 comprises a rivet nut and a sealing piece, the rivet nut comprises a flange and a rivet body connected with the flange, the diameter of the flange is larger than that of the rivet body, the sealing piece is arranged between the flange and the box cover, and the rivet body is used for connecting the sealing plate 12 and the box cover. Specifically, a part of the plurality of connection assemblies 2 is used to connect the first seal plate 121 and the box cover, and another part is used to connect the second seal plate 122 and the box cover. The sealing plate 12 and the box cover are connected through the rivet nuts, so that the joint of the sealing plate 12 and the box cover can bear larger tensile force and shearing stress, and the connection reliability of the sealing plate 12 and the box cover is improved; secondly, by providing a sealing member between the flange and the lid, the sealing member can seal the joint of the flange and the lid. The specific structure of the rivet nut belongs to the prior art, and is not described herein again.

The utility model also provides a power battery, this power battery include foretell liquid cooling battery box, still include the battery module, and the battery module sets up in the intracavity that holds that liquid cooling board 1 and case lid formed. Adopt foretell liquid cooling battery box, can effectively avoid the problem that the thickness of the liquid cooling board body 11 that leads to because coupling 111 increases, to bearing the battery module of same volume and weight size, can effectively reduce the thickness of liquid cooling board body 11, thereby reduced the volume of liquid cooling board body 11, weight and manufacturing cost, and can avoid because the risk of the liquid cooling board 1 inefficacy that liquid cooling runner 112 and heat conduction runner 113 leaked the cause, the performance of liquid cooling board 1 has been improved, thereby the working property of power battery has been improved.

It is obvious that the above embodiments of the present invention are only 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.

Claims (10)

1. Liquid cooling battery box, its characterized in that includes:

the liquid cooling plate (1) comprises a liquid cooling plate body (11) and a sealing plate (12), a flow channel is arranged in the liquid cooling plate body (11), the flow channel comprises liquid cooling flow channels (112) and heat conduction flow channels (113) which are distributed at intervals, the sealing plate (12) is connected to the periphery of the liquid cooling plate body (11) in a sealing mode and seals the flow channel, phase-change materials are filled in the heat conduction flow channels (113), and a pipe joint (111) of the liquid cooling flow channels (112) is arranged on the upper end face of the liquid cooling plate body (11) in the thickness direction;

the case lid, the case lid is located liquid cooling board (1), just coupling (111) are located the case lid with the holding outside the chamber that liquid cooling board (1) formed.

2. The liquid-cooled battery box according to claim 1, wherein the sealing plates (12) comprise two first sealing plates (121) in an L-shape, the two first sealing plates (121) are spaced apart from each other on two sides of the liquid-cooled plate body (11) along a first direction, and the first direction is perpendicular to the thickness direction of the liquid-cooled plate body (11);

the first sealing plate (121) comprises a sealing part (1212) and a connecting part (1211) which are vertically distributed and connected, the sealing part (1212) is welded with the liquid cooling plate body (11) and seals the flow channel, and the connecting part (1211) is connected with the box cover.

3. The liquid-cooled battery box of claim 2, wherein the sealing plate (12) further comprises two second sealing plates (122) with rectangular cross-sections, the two second sealing plates (122) are spaced apart from each other along a second direction on two sides of the liquid-cooled plate body (11), the second sealing plates (122) are welded to the liquid-cooled plate body (11) and close the flow channel, the second sealing plates (122) are further connected to the box cover, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the liquid-cooled plate body (11).

4. A liquid-cooled battery box according to claim 3, wherein the second sealing plate (122) is further provided with lightening holes (1221) extending along its length.

5. The liquid-cooled battery box of claim 3, wherein the thickness of the second seal plate (122) is greater than the thickness of the liquid-cooled plate body (11), and the upper end surface of the first seal plate (121) and the upper end surface of the second seal plate (122) are flush with the upper end surface of the liquid-cooled plate body (11).

6. The liquid-cooled battery box according to any one of claims 1 to 5, wherein the number of the pipe joints (111) is two, and the two pipe joints (111) are arranged at intervals on the upper end face of the liquid-cooled plate body (11) along the thickness direction;

the pipe joint (111) comprises a connecting pipe (1111) and a conical head (1112), and two ends of the connecting pipe (1111) are respectively communicated with the liquid cooling flow channel (112) and the large end of the head (1112).

7. A liquid-cooled battery box according to any of claims 1-5, characterized in that the liquid-cooled battery box further comprises a plurality of connecting members (2), a plurality of the connecting members (2) being spaced apart circumferentially of the box cover;

the connecting assembly (2) comprises a rivet nut and a sealing element, the rivet nut comprises a flange and a rivet body connected with the flange, the diameter of the flange is larger than that of the rivet body, the sealing element is arranged between the flange and the box cover, and the rivet body is used for connecting the sealing plate (12) and the box cover.

8. A liquid-cooled battery box according to any of claims 1 to 5, characterised in that the liquid-cooled plate body (11) is injection moulded in one piece from aluminium with the liquid-cooled flow channels (112) and the heat conducting flow channels (113).

9. A liquid-cooled battery box according to any of claims 1-5, characterized in that at least the part of the liquid-cooled plate body (11) that is in contact with the battery modules is coated with an insulating material.

10. A power battery, characterized in that, comprising the liquid-cooled battery box of any one of claims 1-9, further comprising a battery module, wherein the battery module is disposed in a containing cavity formed by the liquid-cooled plate (1) and the box cover.

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