CN223436568U

CN223436568U - Liquid cooling plate, battery pack and electrical equipment

Info

Publication number: CN223436568U
Application number: CN202422825612.6U
Authority: CN
Inventors: 刘扛扛; 刘勇
Original assignee: Lanjun New Energy Technology Co ltd
Current assignee: Lanjun New Energy Technology Co ltd
Priority date: 2024-11-19
Filing date: 2024-11-19
Publication date: 2025-10-14
Anticipated expiration: 2034-11-19

Abstract

The application relates to a liquid cooling plate, a battery pack and electric equipment, and relates to the technical field of power batteries. The liquid cooling plate comprises a plate body. The inside liquid flow cavity that is formed with of plate body is provided with two at least division boards in the liquid flow cavity, separates the liquid flow cavity into three at least runner chamber. Wherein, the two runner cavities at two sides are mutually communicated to form a first runner structure, and the other runner cavities at the middle are mutually communicated to form a second runner structure. The first flow path structure and the second flow path structure are arranged independently of each other. The liquid cooling plate provided by the application can solve the problem that the service life is influenced by the fact that the larger temperature difference exists at the two sides and the middle area of the cell module in the prior art.

Description

Liquid cooling plate, battery pack and electric equipment

Technical Field

The application relates to the technical field of power batteries, in particular to a liquid cooling plate, a battery pack and electric equipment.

Background

In the use process of the power battery, a cooling structure such as a liquid cooling plate is required to be arranged in a matched mode to cool and dissipate heat for the battery cell module.

In the prior art, when being applied to power battery cooling, the liquid cooling board is directly laminated in electric core module setting to be provided with a plurality of sub-runners in the liquid cooling board and for the coolant liquid to pass through. When the flow channel structure is specifically arranged, an S-shaped flow channel structure is generally formed between all the sub flow channels in an end-to-end mode.

However, when the liquid cooling plate structure is specifically used, the positions of the liquid inlet and the liquid outlet are generally respectively arranged at the positions close to two sides of the liquid cooling plate when the liquid cooling plate structure is arranged, and a large temperature difference generally exists between the liquid inlet and the liquid outlet for cooling liquid, so that a large temperature difference exists between two sides of the battery cell module, and meanwhile, heat aggregation is easier to occur at the middle position of the battery cell module when the battery cell module is used, so that a large temperature difference also exists between the middle and two sides of the battery cell module. The above factors lead to poor overall temperature uniformity of the battery cell module and affect the service life of the battery.

Disclosure of utility model

The application aims to provide a liquid cooling plate, a battery pack and electric equipment, and the liquid cooling plate can solve the problem that in the prior art, the service life is influenced by large temperature difference between two sides and the middle area of a battery cell module.

In order to achieve the above object, according to a first aspect of the present application, an embodiment of the present application provides a liquid cooling plate including a plate body. The inside liquid flow cavity that is formed with of plate body is provided with two at least division boards in the liquid flow cavity, separates the liquid flow cavity into three at least runner chamber. Wherein, two runner cavities that are located both sides communicate each other in order to constitute first runner structure, and other runner cavities that are located the middle part communicate each other in order to constitute second runner structure. The first flow path structure and the second flow path structure are arranged independently of each other.

According to the embodiment of the application, the three flow channel cavities separated in the liquid flow cavity are specifically formed with two flow channel structures, one is a first flow channel structure formed by the two flow channel cavities at two sides together, the other is a second flow channel structure formed by the flow channel cavity at the middle, and the first flow channel structure and the second flow channel structure are mutually independent. Based on the above-mentioned setting, not only the both sides and the middle part of liquid cooling board form different runner structures respectively to the coolant circulation of two sets of runner structures mutually independent, thereby can control the coolant circulation process of above-mentioned two runner structures respectively alone, and then can control the coolant circulation condition of two sets of runner structures respectively according to the different condition of generating heat in electric mandrel group lateral part and middle part. In general, heat accumulation can occur in the middle of the cell module, so that the cooling effect on the middle area of the cell module can be improved by setting a mode that the flow rate of the cooling liquid is faster or the flow rate is larger in a second flow channel structure positioned in the middle, and the overall temperature uniformity of the cell module is higher, so that the overall service life of the cell module is prolonged.

In some embodiments, the first channel is structurally communicated with a first liquid inlet and a first liquid outlet, two channel cavities on two sides are respectively arranged as a first channel cavity and a second channel cavity, the first liquid inlet is connected with the first channel cavity, and the first liquid outlet is connected with the second channel cavity.

Based on the embodiment of the application, the first liquid inlet and the first liquid outlet are arranged for realizing liquid inlet and liquid outlet of the first flow channel structure, so that independent control on the circulation process of the cooling liquid of the first flow channel structure is realized.

In some embodiments, the liquid cooling plate further comprises a manifold having one end in communication with the first flow chamber and another end in communication with the second flow chamber. The plate body is provided with a current collecting end and a communicating end, the current collecting channel is positioned at the current collecting end, and the first liquid outlet and the first liquid inlet are positioned at the communicating end.

According to the embodiment of the application, the collecting channel is arranged as a communication structure between the first flow channel cavity and the second flow channel cavity, and the independently arranged collecting channel can separate the first flow channel structure from the second flow channel structure, so that mutual independence between the two groups of flow channel structures is improved, and the heat dissipation and cooling effects of the two groups of flow channel structures are more convenient to control respectively.

In some embodiments, the second flow channel is structurally communicated with a second liquid inlet and a second liquid outlet, the flow channel cavity in the middle is set as a third flow channel cavity, and at least one sub-flow channel is arranged in the third flow channel cavity. The second liquid inlet and the second liquid outlet are respectively communicated with the sub-runner, and the second liquid inlet and the second liquid outlet are both arranged at the communicating end.

According to the embodiment of the application, the cooling liquid circulation process in the second flow channel structure can be controlled by arranging the second liquid inlet and the second liquid outlet. The arrangement of the sub-flow channels can improve the uniformity of the distribution of the cooling liquid in the second flow channel structure, so that the cooling effect is improved. Simultaneously, all set up second inlet and second liquid outlet at the link to can be connected second inlet and first inlet, second liquid outlet and first liquid outlet are connected and are converged, reduce the pipeline setting when realizing carrying out independent control to the coolant liquid circulation of two sets of runner structures, thereby reduce the occupation to the battery package inner space, promote the energy density of battery package.

In some embodiments, the manifold is disposed on one side of the third flow channel chamber, and an outer wall of the manifold encloses the third flow channel chamber.

According to the embodiment of the application, through the arrangement, the collecting channel can be used as a connecting channel between the first flow channel cavity and the second flow channel cavity, and the outer wall of the collecting channel can be used as an end wall structure of the end part of the third flow channel cavity, so that the production cost can be reduced, the occupation of the internal space of the battery pack can be reduced, and the energy density of the battery pack can be improved.

In some embodiments, the liquid cooling plate has a thickness H ₁ and the channel cavity height H ₂,0mm＜H₂＜(H₁ -1 mm).

According to the embodiment of the application, the height of the flow channel cavity influences the flow rate of the cooling liquid, and through the arrangement, the thickness of the plate body is limited while the height of the flow channel cavity is set, namely, the total thickness of the two side plate bodies is 1mm, and the thickness of the single side plate body is controlled to be about 0.5mm, so that the plate body is ensured to have enough strength, and the integral strength of the liquid cooling plate is further ensured.

According to a second aspect of the present application, there is provided a battery pack including a battery case, a battery cell module, and the above-described liquid cooling plate. The battery cell module is arranged in the battery box, the liquid cooling plate is connected to a box beam of the battery box, and the liquid cooling plate is in butt joint with the battery cell module.

According to the embodiment of the application, the battery pack comprises the liquid cooling plate, and the flow channel structures are respectively and independently arranged at the side parts and the middle part of the liquid cooling plate when the liquid cooling plate is used, so that different heat dissipation and cooling effects can be adjusted according to different heating conditions of the middle part and the side parts of the battery cell module, the overall temperature uniformity of the battery cell module and the battery pack is further improved, and the service life of the battery pack is prolonged.

In some embodiments, the cell module includes a plurality of cells, and a plurality of cells are disposed in the battery box in sequence, and at least three cells are disposed along the width direction of the liquid cooling plate, and at least three cells are disposed in sequence in abutment along the length direction. The two runner cavities at two sides are respectively arranged into a first runner cavity and a second runner cavity, the width of the first runner cavity is H ₃, the length dimension of the battery cell is L, and H ₃ is more than or equal to 1/2L. The width of the second flow passage cavity is H ₄,H₄ to be more than or equal to 1/2L.

Based on the above embodiment of the present application, when the battery packs are arranged in groups, the plurality of battery cells together form the battery cell group, and when the battery packs are arranged, the length direction of the battery cells is arranged along the width direction of the battery packs, that is, along the width direction of the liquid cooling plate. And through setting up the proportional relation between first runner chamber and second runner chamber and the electric core length dimension for the first runner chamber that is located the lateral part when electric core sets up can cover the majority area of the electric core that is located corresponding edge, and the same reason, the second runner chamber can cover the majority area of the electric core that is located corresponding edge, namely guarantees the cooling effect to the heat dissipation of edge electric core through first runner structure. Under the condition, the second flow channel structure positioned in the middle part carries out heat dissipation and cooling on the cell core part positioned in the middle part, and the heat dissipation and cooling effects of the third flow channel cavity, the first flow channel cavity and the second flow channel cavity are correspondingly adjusted according to different heating and heat aggregation conditions of the cell core in the middle part and the cell cores at two sides, so that the temperature difference between the two sides of the cell core module and the middle part is reduced, and the overall temperature of the cell core module and the battery pack is more uniform.

In some embodiments, the liquid cooling plate further comprises a collecting channel, the collecting channel is integrally arranged with the box girder of the battery box, and the ends of the first flow channel cavity and the second flow channel cavity are respectively abutted with the box girder of the battery box to seal the first flow channel cavity and the second flow channel cavity.

According to the embodiment of the application, the collecting channel is integrally arranged with the box girder of the battery box and then is connected with the plate body and other structures as a part of the liquid cooling plate, so that the connection between the liquid cooling plate and the battery box is enhanced, and the overall connection strength of the battery pack is improved.

According to a third aspect of the present application, there is provided an electric device, which includes a housing and the battery pack described above, wherein a battery accommodating chamber is provided in the housing, and the battery pack is provided in the battery accommodating chamber.

Based on the above embodiments of the present application, the electric device provided by the present application includes the above battery pack, so that the present application also has the above beneficial effects, and in order to avoid repetition, the description is omitted here.

Additional features and advantages of the application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate the application and together with the description serve to explain, without limitation, the application. In the drawings:

Fig. 1 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present application.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 1.

Fig. 4 is a schematic diagram of a partial cross-sectional structure of a liquid cooling plate according to an embodiment of the present application.

Fig. 5 is a schematic structural view of a battery pack according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a liquid cooling plate in a battery pack according to an embodiment of the present application.

Fig. 7 is a schematic structural view of a battery case and a current collecting channel in a battery pack according to an embodiment of the present application.

Description of the reference numerals

1. The battery comprises a plate body, 11, a liquid flow cavity, 12, a partition plate, 13, a collecting end, 14, a communicating end, 2, a first flow channel structure, 21, a first liquid inlet, 22, a first liquid outlet, 23, a first flow channel cavity, 24, a second flow channel cavity, 3, a second flow channel structure, 31, a second liquid inlet, 32, a second liquid outlet, 33, a third flow channel cavity, 4, a collecting channel and 5, and a battery box.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, unless otherwise indicated, the terms "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings, or an orientation or a positional relationship conventionally put in place when the product of the application is used, and are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, or may be directly connected, or may be indirectly connected through an intermediate medium, or may be in communication with the inside of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the use process of the power battery, a cooling structure such as a liquid cooling plate is required to be arranged in a matched mode to cool and dissipate heat for the battery cell module. In the prior art, when being applied to power battery cooling, the liquid cooling board is directly laminated in electric core module setting to be provided with a plurality of sub-runners in the liquid cooling board and for the coolant liquid to pass through. When the flow channel structure is specifically arranged, an S-shaped flow channel structure is generally formed between all the sub flow channels in an end-to-end mode.

In order to solve the above-described problems in the prior art, according to a first aspect of the present application, referring to fig. 1, an embodiment of the present application provides a liquid cooling plate including a plate body 1. The inside of the plate body 1 is provided with a liquid flow cavity 11, at least two partition plates 12 are arranged in the liquid flow cavity 11, and the liquid flow cavity 11 is divided into at least three flow channel cavities. Wherein, the two flow channel cavity ends at two sides are mutually communicated to form a first flow channel structure 2, and the other flow channel cavities at the middle are mutually communicated to form a second flow channel structure 3. The first flow channel structure 2 and the second flow channel structure 3 are arranged independently of each other.

Specifically, the fact that the first flow channel structure 2 and the second flow channel structure 3 are independent of each other means that the circulation processes of the cooling liquid in the first flow channel structure 2 and the cooling liquid in the second flow channel structure 3 can be independent of each other, for example, different liquid inlet structures and different liquid outlet structures are respectively arranged while the first flow channel structure 2 and the second flow channel structure 3 are separated, so that the liquid inlet processes and the liquid outlet processes of the two structures can be independently controlled.

According to the above embodiment of the present application, the three flow channel chambers separated in the flow chamber 11 are specifically formed with two flow channel structures, one is a first flow channel structure 2 formed by two flow channel chambers located at both sides together, and the other is a second flow channel structure 3 formed by a flow channel chamber located in the middle, and at the same time, the first flow channel structure 2 and the second flow channel structure 3 are independent from each other.

Based on the arrangement of the application, not only the two sides and the middle part of the liquid cooling plate respectively form different flow channel structures, but also the cooling liquid circulation of the two groups of flow channel structures is mutually independent, so that the cooling liquid circulation processes of the two flow channel structures can be respectively and independently controlled, and further the cooling liquid circulation conditions of the two groups of flow channel structures can be respectively controlled according to the different heating conditions of the side part and the middle part of the battery cell module. In general, heat accumulation occurs in the middle of the cell module, so that the cooling effect on the middle area of the cell module can be improved by setting the second flow channel structure 3 at the middle to enable the overall temperature uniformity of the cell module to be higher, thereby prolonging the overall service life of the cell module.

Specifically, in the present application, the partition plate 12 disposed in the liquid flow chamber 11 is used to separate the liquid flow chamber 11 as a whole, and any suitable connection manner may be selected between the partition plate 12 and the plate body 1 of the liquid cooling plate during a specific production process. For example, the plate body 1 and the partition plate 12 may be integrally formed by extrusion molding or stamping, and the plate body 1 and the partition plate 12 may be integrally formed in the actual production process, so that the structures such as the plate body 1 and the partition plate 12 may be ensured to have better sealing effect and higher connection strength. Or the plate body 1 and the partition plate 12 can be produced and processed respectively, and then are connected and fixed in a welding mode or the like, and the structure and the position of the partition plate 12 can be adjusted more flexibly according to the use requirement.

Further, in some embodiments of the present application, the first fluid inlet 21 and the first fluid outlet 22 may be connected to the first fluid channel structure 2, two fluid channel cavities on two sides are respectively provided as a first fluid channel cavity 23 and a second fluid channel cavity 24, the first fluid inlet 21 is connected to the first fluid channel cavity 23, and the first fluid outlet 22 is connected to the second fluid channel cavity 24.

Based on the above embodiment of the present application, by providing the first liquid inlet 21 and the first liquid outlet 22 for realizing liquid inlet and liquid outlet of the first flow channel structure 2, separate control of the cooling liquid circulation process of the first flow channel structure 2 is realized. Specifically, during the use of the liquid cooling plate, the cooling liquid is injected into the first flow channel cavity 23 through the first liquid inlet 21, then flows into the second flow channel cavity 24 through the first flow channel cavity 23, and finally is discharged from the first liquid outlet 22, so that a circulation process of the cooling liquid is realized.

Further, in the present application, any suitable communication manner may be selected between the first flow channel chamber 23 and the second flow channel chamber 24. Referring to fig. 2, in an exemplary embodiment of the present application, the liquid cooling plate further includes a collecting channel 4, one end of the collecting channel 4 is in communication with the first flow channel chamber 23, and the other end of the collecting channel 4 is in communication with the second flow channel chamber 24. The plate body 1 has a collecting end 13 and a communicating end 14, the collecting channel 4 is located at the collecting end 13, and the first liquid outlet 22 and the first liquid inlet 21 are located at the communicating end 14.

According to the embodiment of the application, the collecting channel 4 is arranged as a communication structure between the first flow channel cavity 23 and the second flow channel cavity 24, and the independently arranged collecting channel 4 can separate the first flow channel structure 2 from the second flow channel structure 3, so that mutual independence between the two groups of flow channel structures is improved, and further the heat dissipation and cooling effects of the two groups of flow channel structures are more convenient to control respectively.

Specifically, when the liquid cooling plate is used, the cooling liquid flows in from the first liquid inlet 21 and sequentially passes through the first flow channel cavity 23, the collecting channel 4 and the second flow channel cavity 24, and finally is discharged from the first liquid outlet 22, and in the process, the collecting channel 4 is used as a part of the first flow channel structure 2 and is matched with the first flow channel cavity 23 and the second flow channel cavity 24 to form a U-shaped flow channel structure.

Alternatively, in the present application, the communication between the first flow channel chamber 23 and the second flow channel chamber 24 may be achieved by other means, for example, a flow guide plate perpendicular to the partition plate 12 is provided at the end positions of the first flow channel chamber 23 and the second flow channel chamber 24, so as to partition a flow channel structure for communication between the end portions of the first flow channel chamber 23 and the second flow channel chamber 24. At this time, the cooling liquid flows into the second flow channel cavity 24 through the end communicating flow channel structure after flowing into the first flow channel cavity 23 through the first liquid inlet 21, and finally is discharged from the first liquid outlet 22 to complete a circulation process, and in this process, the first flow channel structure 2 is also formed into a U-shaped flow channel structure.

Compared with the mode of arranging the collecting channel 4, the difference of arranging the guide plate is that the guide plate is directly arranged in the liquid flow cavity 11 and is directly fixed on the plate body 1 like the partition plate 12, the guide plate needs to be matched with the plate body 1 and other structures to form a flow channel structure for communication, the collecting channel 4 can be independently arranged, and the collecting channel 4 can form a flow channel structure.

In still other embodiments of the present application, the communication structure may be disposed at a middle position of the first flow channel cavity 23 and the second flow channel cavity 24, which is different from the above two arrangements in that the first flow channel structure 2 forms an H-shaped flow channel structure. At this time, the communication structure is specifically set as either the collecting channel 4 or the baffle.

In summary, in the present application, any suitable connection manner may be selected between the first flow channel cavity 23 and the second flow channel cavity 24, and the connection manner may be selected according to the selected connection manner, the flow direction of the different cooling fluids of the connection structure, and the flow channel structure formed correspondingly, and the heat dissipation requirement may be specifically selected, which is not limited in the present application.

Referring to fig. 1 to 3, in some embodiments of the present application, the second flow channel structure 3 may be connected to a second liquid inlet 31 and a second liquid outlet 32, and a flow channel cavity located in the middle is provided as a third flow channel cavity 33, and at least one sub-flow channel is provided in the third flow channel cavity 33. The second liquid inlet 31 and the second liquid outlet 32 are respectively communicated with the sub-flow channels, and the second liquid inlet 31 and the second liquid outlet 32 are both arranged at the communicating end 14.

According to the above embodiment of the present application, the circulation process of the cooling liquid in the second flow path structure 3 can be controlled by providing the second liquid inlet 31 and the second liquid outlet 32. The arrangement of the sub-flow channels can improve the uniformity of the distribution of the cooling liquid in the second flow channel structure 3, so that the cooling effect is improved. Simultaneously, all set up second inlet 31 and second liquid outlet 32 at link 14, namely be located same one end with first inlet 21 and first liquid outlet 22 promptly to can connect second inlet 31 and first inlet 21, second liquid outlet 32 and first liquid outlet 22 are connected and are converged, reduce the pipeline setting when realizing carrying out independent control to the coolant liquid circulation of two sets of runner structures, thereby reduce the occupation to the battery package inner space, promote the energy density of battery package.

In addition, it should be noted that, in the present application, the first flow channel structure 2 and the second flow channel structure 3 are respectively provided with a liquid inlet and a liquid outlet, so that the liquid inlet and the liquid outlet processes of the first flow channel structure 2 and the second flow channel structure 3 can be respectively controlled. Further, when the first liquid inlet 21 is communicated with the second liquid inlet 31, the first liquid outlet 22 is communicated with the second liquid outlet 32, in order to ensure that the circulation processes of the cooling liquid in the first flow channel structure 2 and the cooling liquid in the second flow channel structure 3 can be controlled separately, a valve structure can be further arranged at the connection position of the first liquid inlet 21 and the second liquid inlet 31 for controlling the diversion condition of the cooling liquid therein, for example, a diverter valve is arranged. Alternatively, valve structures, such as water stop valves, may be disposed at the positions of the first liquid inlet 21 and the second liquid inlet 31, so as to control the flow conditions of the corresponding flow channels. Alternatively, a control valve may be provided only at the position of one of the first liquid inlet 21 and the second liquid inlet 31, and when the total flow rate of the liquid inlet is unchanged, the flow rate of the liquid inlet on the other side is passively adjusted after the flow rate of the liquid inlet on the one side is adjusted.

Referring to fig. 1-3, in some embodiments of the present application, the first and second inlets 21, 31 are each connected with a different inlet tube, and then the two different inlet tubes communicate and merge into the same main inlet line. Similarly, the first liquid outlet 22 and the second liquid outlet 32 are respectively communicated with different liquid outlet pipes, and then the two different liquid outlet pipes are converged to the same main liquid outlet pipeline. In this process, feed liquor pipe, main feed liquor pipeline, drain pipe and main drain pipeline all set up at the link 14 of liquid cooling board, consequently only need leave the space in the position that liquid cooling board link 14 is located and be used for setting up the circulation pipeline when the battery package sets up in groups to reduce the occupation to battery package inner space.

Further, when the first flow channel chamber 23 and the second flow channel chamber 24 are communicated through the collecting channel 4, in some embodiments of the present application, the collecting channel 4 may be disposed at one side of the third flow channel chamber 33, and an outer wall of the collecting channel 4 closes the third flow channel chamber 33.

According to the embodiment of the application, through the arrangement, the collecting channel 4 can be used as a connecting channel between the first flow channel cavity 23 and the second flow channel cavity 24, and the outer wall of the collecting channel 4 can be used as an end wall structure of the end part of the third flow channel cavity 33, so that the production cost can be reduced, the occupation of the internal space of the battery pack can be reduced, and the energy density of the battery pack can be improved.

In addition, it should be noted that, in the present application, in order to enhance the uniformity of the distribution of the cooling liquid in the first flow path chamber 23, the second flow path chamber 24, and the third flow path chamber 33, sub-flow paths may be provided in the first flow path chamber 23, the second flow path chamber 24, and the third flow path chamber 33, respectively. The flow channel cavities are respectively divided into a plurality of sub flow channels by the separation strip.

Further, when the sub-flow channel structures are respectively provided in the first flow channel cavity 23 and the second flow channel cavity 24, the cooling liquid flows in from the first liquid inlet 21, passes through the sub-flow channel in the first flow channel cavity 23, then flows to the sub-flow channel in the second flow channel cavity 24 through the collecting channel 4, and finally is discharged from the first liquid outlet 22. In this process, in order to reduce the temperature difference of the cooling liquid from the first liquid inlet 21 to the first liquid outlet 22, the plurality of sub-flow passages located in the first flow passage chamber 23 may be set to the same flow direction, and the plurality of sub-flow passages located in the second flow passage chamber 24 may be set to the same flow direction, and at this time, the flow path of the cooling liquid when flowing through the first flow passage chamber 23 coincides with the length of the first flow passage chamber 23, and the flow path of the cooling liquid when flowing through the second flow passage chamber 24 coincides with the length of the second flow passage chamber 24, thereby shortening the flow path of the cooling liquid from the first liquid inlet 21 to the first liquid outlet 22, thereby reducing the temperature difference therebetween.

Meanwhile, when the sub-runner structure is arranged in the third runner cavity 33, the S-shaped runner structure can be correspondingly arranged in the third runner cavity 33 aiming at the condition that heat aggregation is easy to occur in the middle of the battery cell module, so that the heat exchange time of the cooling liquid and the battery cell module is prolonged, and the heat dissipation efficiency is improved. Specifically, for example, when nine sub-flow channels are separated by providing the separation strip in the third flow channel chamber 33, every three adjacent sub-flow channels may be set as one group at this time, the first group of sub-flow channels are set to have the same flow direction, then the second group of sub-flow channels are set to have the same flow direction and flow direction opposite to the first group of sub-flow channels, and finally the third group of sub-flow channels are set to have the same flow direction and flow direction opposite to the second group of sub-flow channels, so that the S-type flow channel structure is jointly formed by three groups of nine sub-flow channels.

Further, in order to ensure that the second liquid inlet 31 and the second liquid outlet 32 are disposed at the same end, four groups of sub-channels in the third flow channel chamber 33 may be disposed, for example, as shown in fig. 1, twelve sub-channel structures are disposed in a group of adjacent three sub-channels, wherein the first three groups of sub-channels are disposed in the same manner and flow direction as the nine sub-channels, and then the fourth group of sub-channels are disposed in the same flow direction and flow direction opposite to the third group of sub-channels, i.e., the flow direction of the fourth group of sub-channels is opposite to the first group of sub-channels, and at this time, the second liquid inlet 31 and the second liquid outlet 32 are disposed at the start end of the first group of sub-channels and the end of the fourth group of sub-channels, respectively, so that the second liquid inlet 31 and the second liquid outlet 32 can be disposed at the same end.

Referring to fig. 3, in some embodiments of the present application, when sub-channels are provided in each channel cavity, in order to improve the distribution uniformity of the cooling liquid in each sub-channel, the first liquid inlet 21 and the second liquid inlet 31 may be provided at the trisection positions in the width direction of the plurality of sub-channels corresponding to the same flow direction of the channel cavity. For example, when three sub-channels are disposed in the first channel cavity 23 and the three sub-channels are disposed in the same flow direction, the first liquid inlet 21 may be disposed at a position in a trisection of the width direction of the first channel cavity 23, that is, a position between the first sub-channel and the second sub-channel near the side plate, and since the third sub-channel is closer to the collecting channel 4, the flow rate of the cooling liquid in the third sub-channel is also faster, and the cooling liquid also flows to the third sub-channel more easily, the flow rate of the cooling liquid flowing into the first sub-channel and the second sub-channel can be increased by disposing the first liquid inlet 21 closer to the first sub-channel and the second sub-channel, so that the cooling liquid distribution between the three sub-channels is more uniform.

Similarly, when the sub-runner structure is disposed in the third runner cavity 33, taking four groups of twelve sub-runners as an example, the first group of three sub-runners have the same flow direction, and the second liquid inlet 31 can be disposed at a trisection position in the width direction of the first group of sub-runners, that is, a position between the first sub-runner and the second sub-runner close to the first runner cavity 23, so that the distribution of the cooling liquid between the three sub-runners is more uniform, the overall temperature uniformity of the liquid cooling plate is improved, and the heat dissipation and cooling effects are improved.

Referring to fig. 4, in some embodiments of the present application, the flow channel cavity height and the like need to be limited in order to ensure the strength and the overflow capability of the liquid cooling plate as a whole. Specifically, the thickness of the liquid cooling plate is H ₁, and the height of the runner cavity is H ₂,0mm＜H₂＜(H₁ -1 mm).

According to the embodiment of the application, the height of the flow channel cavity influences the flow rate of the cooling liquid, and through the arrangement, the thickness of the plate body 1 is limited while the height of the flow channel cavity is set, namely, the total thickness of the two side plate bodies 1 is 1mm, and then the thickness of the single side plate body 1 is controlled to be about 0.5mm, so that the plate body 1 is ensured to have enough strength, and the integral strength of the liquid cooling plate is ensured.

On the basis of the above-described technical solution, according to a second aspect of the present application, there is provided a battery pack including the battery case 5, the cell module (not shown), and the above-described liquid cooling plate, as shown with reference to fig. 5. The cell module is arranged in the battery box 5, the liquid cooling plate is connected to a box beam of the battery box 5, and the liquid cooling plate is in butt joint with the cell module.

Specifically, any suitable connection method may be selected for the liquid cooling plate when it is connected to the structure such as the battery box 5. In the above embodiment of the present application, the liquid cooling plate is directly connected with the box beam of the battery box 5, that is, the liquid cooling plate is directly connected with the inner wall of the box beam structure around the battery box 5, and the specific connection can be fixed by welding or bolting. When specifically selecting welded fastening, under the circumstances of guaranteeing hookup location joint strength and sealed effect, the mass flow end 13 and the link 14 of liquid cooling board can directly set up the opening, directly seals mass flow end 13 and the link 14 of liquid cooling board with the wall structure of case roof beam when liquid cooling board and the case roof beam welded fastening of battery case 5 afterwards, above-mentioned setting not only can reduce manufacturing cost, can also reduce the occupation to battery package inner space to promote the energy density of battery package.

Further, in the present application, the battery cell modules are generally arranged in groups of a plurality of battery cells, and adjacent battery cells are connected through a tab to form the battery cell module. The number of the battery cells in a single battery cell module can be set according to factors such as the output power requirement of the battery pack during specific setting.

Referring to fig. 6, in one embodiment of the present application, a plurality of electric cells (not shown) are sequentially disposed in the battery box 5, and at least three electric cells are disposed along the width direction of the liquid cooling plate, and at least three electric cells are sequentially disposed in abutment along the length direction. The two runner cavities at two sides are respectively arranged into a first runner cavity 23 and a second runner cavity 24, the width of the first runner cavity 23 is H ₃, the length dimension of the battery cell is L, and H ₃ is more than or equal to 1/2L. The width of the second flow channel cavity 24 is H ₄,H₄ to be more than or equal to 1/2L.

Based on the above embodiment of the present application, when the battery packs are arranged in groups, the plurality of battery cells together form the battery cell group, and when the battery packs are arranged, the length direction of the battery cells is arranged along the width direction of the battery packs, that is, along the width direction of the liquid cooling plate. For example, when three cells are disposed along the width direction of the battery pack, the first flow channel cavities 23 and the second flow channel cavities 24 are disposed in the proportional relationship with the length dimension of the cells, so that the first flow channel cavities 23 on the side portion can cover most of the area of the cells on the corresponding edge when the cells are disposed, and the second flow channel cavities 24 can cover most of the area of the cells on the corresponding edge, that is, the heat dissipation and cooling effects on the edge cells are ensured by the first flow channel structures 2 on the two sides. At this time, most of the area of the cell located at both side edges is covered with the first and second flow path chambers 23 and 24 for heat dissipation and cooling.

Correspondingly, the third flow channel cavity 33 in the middle part dissipates heat and cools the middle part cell and the junction position of the middle part cell and the cells at two sides, and as other cells are arranged at two sides of the middle part cell, each cell generates heat to a certain extent in the use process, the temperature of the middle part cell and the junction position of the middle part cell and the cells at two sides is generally higher than that of the two side areas, and at the moment, the liquid flow condition in the third flow channel cavity 33 can be independently regulated according to the heat dissipation requirement so as to regulate the heat dissipation and cooling effects of the third flow channel cavity, so that the temperature of the two sides of the whole cell module and the middle part is more uniform.

Referring to fig. 7, in some embodiments of the present application, the collecting channel 4 may be integrally provided with a box girder of the battery box 5, and ends of the first and second flow channel chambers 23 and 24 at the collecting end 13 are respectively abutted with the box girder of the battery box 5 to close the ends of the first and second flow channel chambers 23 and 24 at the collecting end 13.

According to the embodiment of the application, the collecting channel 4 and the box girder of the battery box 5 are integrally arranged, and then are connected with the plate body 1 and other structures as a part of the liquid cooling plate, so that the connection between the liquid cooling plate and the battery box 5 is enhanced, and the overall connection strength of the battery pack is improved.

On the basis of the technical scheme, according to a third aspect of the application, the electric equipment comprises a shell and the battery pack. A battery accommodating cavity is formed in the shell, and a battery pack is arranged in the battery accommodating cavity.

Specifically, in the present application, the electric equipment may be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, spacecraft, and the like.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the application can be made without departing from the spirit of the application, which should also be considered as disclosed herein.

Claims

1. A liquid cooling plate, characterized in that the liquid cooling plate comprises:

A plate body, wherein a liquid flow cavity is formed therein, and at least two partition plates are provided in the liquid flow cavity to divide the liquid flow cavity into at least three flow channel cavities;

The two flow channel cavities located on both sides are interconnected to form a first flow channel structure, and the other flow channel cavities located in the middle are interconnected to form a second flow channel structure;

The first flow channel structure and the second flow channel structure are arranged independently of each other.

2. The liquid cooling plate according to claim 1 is characterized in that the first flow channel structure is connected to a first liquid inlet and a first liquid outlet, and the two flow channel cavities located on both sides are respectively set as the first flow channel cavity and the second flow channel cavity, the first liquid inlet is connected to the first flow channel cavity, and the first liquid outlet is connected to the second flow channel cavity.

3. The liquid cooling plate according to claim 2, further comprising a collecting channel, one end of which is in communication with the first flow channel cavity, and the other end of which is in communication with the second flow channel cavity;

The plate body has a current collecting end and a communicating end, the current collecting channel is located at the current collecting end, and the first liquid outlet and the first liquid inlet are located at the communicating end.

4. The liquid cooling plate according to claim 3, wherein the second flow channel structure is connected to a second liquid inlet and a second liquid outlet, the flow channel cavity located in the middle is configured as a third flow channel cavity, and at least one sub-flow channel is configured in the third flow channel cavity;

The second liquid inlet and the second liquid outlet are respectively communicated with the sub-channel, and the second liquid inlet and the second liquid outlet are both arranged at the communication end.

5 . The liquid cooling plate according to claim 4 , wherein the collecting channel is provided on one side of the third flow channel cavity, and an outer wall of the collecting channel closes the third flow channel cavity.

6 . The liquid cooling plate according to claim 1 , wherein the thickness of the liquid cooling plate is H ₁ , the height of the flow channel cavity is H ₂ , and 0 mm < H ₂ < (H ₁ −1 mm).

7. A battery pack, characterized in that the battery pack comprises:

Battery box;

a battery cell module, the battery cell module being disposed in the battery box; and

The liquid cooling plate according to any one of claims 1 to 6, wherein the liquid cooling plate is connected to the box beam of the battery box, and the liquid cooling plate abuts the battery cell module.

8. The battery pack according to claim 7, wherein the battery cell module comprises a plurality of battery cells, the plurality of battery cells are sequentially arranged in the battery box, and at least three battery cells are arranged along the width direction of the liquid cooling plate, and the at least three battery cells are sequentially abutted along the length direction;

The two flow channel cavities on both sides are respectively set as a first flow channel cavity and a second flow channel cavity, the width of the first flow channel cavity is H ₃ , the length of the battery cell is L, and H ₃ ≥ 1/2L;

The width of the second flow channel cavity is H ₄ , and H ₄ ≥ 1/2L.

9. The battery pack according to claim 8 is characterized in that the liquid cooling plate further includes a collecting channel, which is integrally provided with the box beam of the battery box, and the ends of the first flow channel cavity and the second flow channel cavity are respectively abutted against the box beam of the battery box to close the first flow channel cavity and the second flow channel cavity.

10. An electrical device, characterized in that the electrical device comprises:

a housing having a battery receiving cavity therein; and

The battery pack according to any one of claims 7 to 9, wherein the battery pack is arranged in the battery accommodating cavity.