Power supply system

Abstract

The application relates to the technical field of battery system, aims to solve the problem of how to improve the sealing performance of a battery module, and provides a power supply system which comprises a shell, a sealing assembly and a battery module. The shell is provided with a cavity and an opening which is in communication with the cavity. The sealing assembly is arranged in the shell and divides the cavity into a sealed cavity and an outer cavity which are not in communication with each other. The sealed cavity and the outer cavity are distributed along a first direction. The side of the outer cavity which is far away from the sealed cavity is in communication with the opening. The sealing assembly comprises a sealing plate, a pressing piece and a sealing piece. The sealing plate blocks the side of the sealed cavity which is close to the outer cavity. The pressing piece is arranged around the outer periphery of the sealing plate and is connected with the sealing plate and the shell respectively. The sealing piece is arranged between the pressing piece and the sealing plate in a pressing mode. The battery module is arranged in the cavity. The battery module defines a cooling flow channel which is in communication with the sealed cavity. The application has the beneficial effect of improving the sealing performance of the battery module.

Description

Technical Field

[0001] This application relates to the field of battery system technology, and more specifically, to power supply systems. Background Technology

[0002] A power system is provided in the related art that uses liquid cooling to dissipate heat from the battery module. However, the power system in the related art has poor sealing performance. Utility Model Content

[0003] This application provides a power system to address the problem of how to improve the sealing of battery modules.

[0004] Embodiments of this application provide a power system including a housing, a sealing assembly, and a battery module. The housing has a cavity and an opening communicating with the cavity. The sealing assembly is disposed within the housing and divides the cavity into a sealed cavity and an outer cavity that are not communicating with each other. The sealed cavity and the outer cavity are distributed along a first direction. The side of the outer cavity away from the sealed cavity communicates with the opening. The sealing assembly includes a sealing plate, a clamping member, and a sealing member. The sealing plate blocks the side of the sealed cavity near the outer cavity. The clamping member is disposed around the outer periphery of the sealing plate and is connected to both the sealing plate and the housing. The sealing member is pressed between the clamping member and the sealing plate. The battery module is disposed within the sealed cavity and defines a cooling channel that communicates with the sealed cavity.

[0005] The aforementioned power system has an outer cavity that houses the battery module and cooling medium. The cooling medium flows through the cooling channels of the battery module to cool it. A double seal is achieved through a sealing plate and sealing elements. A clamping element is used to fix the sealing elements and complete the sealing structure, thereby improving the sealing performance of the battery module and making it suitable for various power application scenarios.

[0006] In one embodiment, the sealing plate includes a sealing plate body and a boss. The sealing plate body separates a sealing cavity and an outer cavity. The boss protrudes from the side of the sealing plate body away from the sealing cavity and extends along the outer periphery of the sealing plate body. The sealing plate body protrudes from the boss in a direction perpendicular to a first direction and forms a flange, which surrounds the boss. A sealing element is fitted onto the outer periphery of the boss. A clamping element presses the sealing element against the flange in the first direction.

[0007] In one embodiment, the clamping member includes a first annular portion and a second annular portion. The first annular portion is disposed around the outer periphery of the sealing plate and covers the side of the boss away from the sealing cavity in a first direction. One side of the second annular portion is connected to the first annular portion, and the second annular portion extends into the sealing cavity in the first direction. A sealing member is disposed between the flange and the second annular portion. The power system also includes a plurality of first fasteners distributed circumferentially along the clamping member, and the first fasteners are respectively inserted through the first annular portion and the boss in the first direction.

[0008] In one embodiment, the power system further includes a plurality of second fasteners. The plurality of second fasteners are distributed circumferentially along the clamping member and are respectively inserted into the housing and the second annular portion in a direction perpendicular to the first direction.

[0009] In one embodiment, the power system further includes a panel and a control board. The panel is located on the side of the sealing plate away from the sealing cavity along a first direction. The control board is disposed between the panel and the sealing plate.

[0010] In one embodiment, the power system further includes terminals and a water tap. The terminals and the water tap are respectively located on the side of the panel away from the control panel.

[0011] In one embodiment, the power system further includes a waterproof plug and a communication plug, which are respectively disposed on the sealing plate; and / or, the power system further includes a vent valve disposed on the housing.

[0012] In one embodiment, there are two battery modules distributed along a second direction, which intersects with a first direction. Each battery module includes multiple battery cells, with cooling channels defined between adjacent cells, and a vent is provided on the side of each cell away from the other battery module along the second direction.

[0013] In one embodiment, the battery module further includes a first housing, a second housing, and a third housing. The first housing and the second housing are located on opposite sides of the plurality of battery cells along a first direction. The third housing is located on the side of the plurality of battery cells along a second direction away from another battery module.

[0014] In one embodiment, the battery module further includes multiple adhesive strips disposed between two adjacent cells along a third direction. The first direction, the second direction, and the third direction intersect each other. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of a portion of the power supply system in one embodiment of this application.

[0017] Figure 2 for Figure 1 Exploded view of the sealing assembly and housing in the illustrated embodiment.

[0018] Figure 3 for Figure 2 A magnified view of a portion of point A in the illustrated embodiment.

[0019] Figure 4 for Figure 1 An exploded view of the power supply system in the illustrated embodiment.

[0020] Figure 5 for Figure 1 An exploded view of the battery module in the illustrated embodiment.

[0021] Explanation of key component symbols: Power System 100 Casing 10 Cavity 10a Sealed cavity 10a1 external cavity 10a2 Open 10b Sealing component 20 Sealing plate 21 Sealing plate body 211 Flange 2111 212 convex surface Clamping component 22 First ring section 221 Second ring section 222 Seal 23 Battery Module 30 Cooling channel 30a Cell 31 Explosion vent 31a First outer shell 32 Second outer shell 33 Third outer shell 34 35 adhesive strips First fastener 40 Second fastener 50 Panel 60 Control board 70 Terminal block 80 90 water tap Waterproof plug-in 110 Communication Plug-in 120 Vent valve 130 CCS Component 140 First direction Z Second direction X Third direction Y The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] Example Figure 1 This is a partially exploded view of the power system 100 in one embodiment of this application; Figure 2 for Figure 1 Exploded view of the sealing assembly 20 and the housing 10 in the illustrated embodiment; Figure 3 for Figure 2 A magnified view of a portion of point A in the illustrated embodiment.

[0027] See Figures 1 to 3This embodiment provides a power system 100, including a housing 10, a sealing assembly 20, and a battery module 30. The housing 10 has a cavity 10a and an opening 10b communicating with the cavity 10a. The sealing assembly 20 is disposed inside the housing 10 and divides the cavity 10a into a non-communicating sealed cavity 10a1 and an outer cavity 10a2. The sealed cavity 10a1 and the outer cavity 10a2 are distributed along a first direction Z. The side of the outer cavity 10a2 away from the sealed cavity 10a1 communicates with the opening 10b. The sealing assembly 20 includes a sealing plate 21, a clamping member 22, and a sealing member 23. The sealing plate 21 blocks the side of the sealed cavity 10a1 near the outer cavity 10a2. The clamping member 22 is disposed around the outer periphery of the sealing plate 21 and is connected to the sealing plate 21 and the housing 10 respectively. The sealing member 23 is squeezed between the clamping member 22 and the sealing plate 21. The battery module 30 is disposed in the sealed cavity 10a1, and the battery module 30 defines a cooling channel 30a, which is connected to the sealed cavity 10a1.

[0028] The aforementioned power system 100 has a sealed cavity 10a1 for accommodating the battery module 30 and a cooling medium. The cooling medium flows through the cooling channel 30a of the battery module 30 to cool it. A double seal is achieved in the sealed cavity 10a1 by a sealing plate 21 and a sealing element 23. A clamping element 22 is used to fix the sealing element 23 and establish a sealing structure, thereby improving the sealing performance of the battery module 30 and making it suitable for various power application scenarios. Optionally, the cooling medium is an insulating cooling medium, which, through the sealing structure and the insulating cooling medium, effectively isolates oxygen, blocks combustion conditions during a short circuit, and suppresses heat spread. Optionally, the sealing element 23 can be a sealing ring surrounding the sealing plate 21.

[0029] Figure 4 for Figure 1 An exploded view of the power system 100 in the illustrated embodiment.

[0030] In some embodiments, such as Figure 4 As shown, the outer shell 10 can adopt a finned design, which achieves efficient material utilization while ensuring the overall structural strength of the outer shell 10. At the same time, the finned design significantly increases the effective heat dissipation area of ​​the outer shell 10 and improves heat dissipation efficiency. Moreover, this structure effectively reduces the overall weight of the outer shell 10 by optimizing material distribution while ensuring structural strength and heat dissipation performance.

[0031] In some embodiments, such as Figure 3 As shown, the sealing plate 21 includes a sealing plate body 211 and a boss 212. The sealing plate body 211 separates the sealing cavity 10a1 and the outer cavity 10a2 (see...). Figure 2A boss 212 protrudes from the sealing plate body 211 on the side away from the sealing cavity 10a1. The boss 212 extends along the outer periphery of the sealing plate body 211, and the sealing plate body 211 protrudes from the boss 212 in a direction perpendicular to the first direction Z, forming a flange 2111. The flange 2111 surrounds the boss 212. The sealing member 23 is fitted onto the outer periphery of the boss 212, and the clamping member 22 presses the sealing member 23 against the flange 2111 in the first direction Z. Thus, by providing the boss 212, the sealing plate 21 and the clamping member 22 are connected and fixed, and by providing the flange 2111, the sealing member 23 is supported.

[0032] In some embodiments, such as Figure 3 As shown, the clamping member 22 includes a first annular portion 221 and a second annular portion 222. The first annular portion 221 is arranged around the outer periphery of the sealing plate 21, covering the side of the boss 212 away from the sealing cavity 10a1 along the first direction Z. One side of the second annular portion 222 is connected to the first annular portion 221, and the second annular portion 222 extends into the sealing cavity 10a1 along the first direction Z. The sealing member 23 is disposed between the flange 2111 and the second annular portion 222. Figure 4 As shown, the power system 100 also includes a plurality of first fasteners 40, which are distributed circumferentially along the clamping member 22. The first fasteners 40 are respectively inserted into the first annular portion 221 and the boss 212 along the first direction Z, so that the clamping member 22 and the boss 212 form a fastening connection, thereby pressing the seal 23 against the flange 2111 by the second annular portion 222.

[0033] In some embodiments, such as Figure 4 As shown, the power system 100 also includes a plurality of second fasteners 50. The plurality of second fasteners 50 are distributed circumferentially along the clamping member 22, and the second fasteners 50 are respectively inserted into the housing 10 and the second annular portion 222 in a direction perpendicular to the first direction Z, so as to form a fastening connection between the housing 10 and the clamping member 22, thereby fixing the sealing assembly 20 relative to the housing 10.

[0034] During assembly, the clamping member 22 is first fixed to the outer shell 10 by the second fastener 50, and then the sealing plate 21 is tightened by the first fastener 40 to compress the sealing member 23 to form a sealing structure.

[0035] In some embodiments, such as Figure 4 As shown, the power system 100 also includes a panel 60 and a control board 70. The panel 60 is located on the side of the sealing plate 21 away from the sealing cavity 10a1 along the first direction Z, and the control board 70 is disposed between the panel 60 and the sealing plate 21. This facilitates the connection or electrical connection of the battery module 30 to external components via the panel 60.

[0036] In some embodiments, such as Figure 4As shown, the power system 100 also includes a terminal block 80 and a water nozzle 90, which are respectively located on the side of the panel 60 away from the control panel 70. The terminal block 80 is used for electrical connection to external components. The water nozzle 90 is used for circulating cooling medium into the sealed cavity 10a1.

[0037] In some embodiments, such as Figure 4 As shown, the power system 100 also includes a waterproof plug-in 110 and a communication plug-in 120, which are respectively disposed on the sealing plate 21. This facilitates the connection of the waterproof plug-in 110 and the communication plug-in 120 to components outside the battery module 30, making the power system 100 reasonably arranged.

[0038] In some embodiments, such as Figure 4 As shown, the power system 100 also includes a vent valve 130, which is mounted on the housing 10.

[0039] In some embodiments, such as Figure 4 As shown, there are two battery modules 30, distributed along a second direction X. The second direction X intersects with the first direction Z. Each battery module 30 includes multiple battery cells 31, with cooling channels 30a defined between adjacent cells 31. Each cell 31 has a vent 31a on the side along the second direction X away from the other battery module 30. This ensures the vent 31a of the cell 31 faces outwards, improving safety. Because cooling channels 30a are formed between the cells 31 for the flow of cooling medium, the battery module 30 can be uniformly cooled by liquid cooling. During use, the cooling medium completely immerses the battery module 30, achieving a dual improvement in heat dissipation performance and safety. The structure is compact and maintenance is simple. Optionally, the multiple cooling channels 30a are evenly distributed.

[0040] During assembly of the power system 100, the battery modules 30 are arranged in a preset array and fixed inside the housing 10. The housing 10 is then sealed. Cooling medium is then injected through the liquid inlet connected to the sealed cavity 10a1 until the battery modules 30 are completely submerged. Finally, a liquid cooling circulation system is established to form a closed cooling circuit.

[0041] In some embodiments, the battery cell 31 is provided with a tab on the side away from the other battery module 30 along the second direction X, so that the tab areas of adjacent battery cells 31 are located on the same side, forming a concentrated heat dissipation channel, and heat dissipation can be enhanced by expanding the cooling flow channel 30a on the tab side.

[0042] In some embodiments, such as Figure 4As shown, the battery module 30 also includes a first outer shell 32, a second outer shell 33, and a third outer shell 34. The first outer shell 32 and the second outer shell 33 are respectively located on both sides of the plurality of battery cells 31 along the first direction Z, and the third outer shell 34 is located on the side of the plurality of battery cells 31 along the second direction X away from the other battery module 30. Optionally, the first outer shell 32 and the second outer shell 33 are bundled and fixed together.

[0043] Figure 5 for Figure 1 An exploded view of the battery module 30 in the illustrated embodiment.

[0044] In some embodiments, such as Figure 5 As shown, the battery module 30 also includes multiple adhesive strips 35, which are disposed between two adjacent battery cells 31 along a third direction Y. The first direction Z, the second direction X, and the third direction Y intersect each other. Thus, by setting the adhesive strips 35, the battery cells 31 are fixed, and a preset distance is maintained between adjacent battery cells 31, ensuring unobstructed cooling channels 30a. Furthermore, the adhesive strips 35 improve structural stability, act as a buffer, and further protect the battery cells 31.

[0045] The aforementioned power system 100, through the symmetrical arrangement of two battery modules 30 and the synergistic effect of fixing with adhesive strips 35, achieves rapid heat dissipation from the tab area and uniform temperature distribution of the battery module 30 as a whole, thereby improving the heat dissipation performance and service life of the battery module 30.

[0046] In some embodiments, such as Figure 4 and Figure 5 As shown, the power system 100 also includes two CCS (cell contacting system) components 140, which correspond to two battery modules 30 respectively. The CCS components 140 are located between the corresponding battery module 30 and the third housing 34.

[0047] During assembly, the battery cells 31 and adhesive strips 35 are stacked into groups, and assembled into a battery module 30 through the cooperation of the first housing 32, the second housing 33, and the third housing 34. Then, the CCS assembly 140 is welded to the battery module 30, and the battery module 30 is placed inside the housing 10 after welding. Next, a waterproof insert 110 and a communication insert 120 are installed on the sealing plate 21, and the battery module 30 is sealed through the cooperation of the sealing element 23 and the clamping element 22. Then, a vent valve 130 is installed on the housing 10. Finally, the BMU (Battery Management Unit) control board 70, the terminal block 80, and the water nozzle 90 are assembled onto the panel 60, and the panel 60 is assembled with the housing 10, thus completing the overall assembly of the power system 100. Coolant circulation is achieved through the water nozzle 90. In this way, the modular design achieves precise matching of the components, improving assembly efficiency and sealing performance.

[0048] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A power supply system, characterized in that, include: The outer shell has a cavity and an opening communicating with the cavity; A sealing assembly, disposed within the housing, divides the cavity into a non-communicating sealed cavity and an outer cavity, the sealed cavity and the outer cavity being distributed along a first direction. The side of the outer cavity away from the sealed cavity communicates with the opening. The sealing assembly includes a sealing plate, a clamping member, and a sealing element. The sealing plate blocks the side of the sealed cavity near the outer cavity. The clamping member is disposed around the outer periphery of the sealing plate and is connected to both the sealing plate and the housing. The sealing element is pressed between the clamping member and the sealing plate. A battery module is disposed within the sealed cavity, the battery module defining a cooling channel, and the cooling channel communicating with the sealed cavity.

2. The power supply system according to claim 1, characterized in that: The sealing plate includes a sealing plate body and a boss. The sealing plate body separates the sealing cavity and the outer cavity. The boss protrudes from the side of the sealing plate body away from the sealing cavity. The boss extends along the outer periphery of the sealing plate body. The sealing plate body protrudes from the boss in a direction perpendicular to the first direction and forms a flange. The flange surrounds the boss. The sealing element is sleeved on the outer periphery of the boss; The clamping member presses the sealing member against the flange along the first direction.

3. The power supply system according to claim 2, characterized in that: The clamping member includes a first annular portion and a second annular portion. The first annular portion is arranged around the outer periphery of the sealing plate and covers the side of the boss away from the sealing cavity along the first direction. One side of the second annular portion is connected to the first annular portion and the second annular portion extends into the sealing cavity along the first direction. The sealing element is disposed between the flange and the second annular portion; The power system further includes a plurality of first fasteners, which are distributed circumferentially along the clamping member and are respectively inserted into the first annular portion and the boss along the first direction.

4. The power supply system according to claim 3, characterized in that: The power system also includes multiple second fasteners; Multiple second fasteners are distributed circumferentially along the clamping member, and the second fasteners are respectively inserted into the outer shell and the second annular portion in a direction perpendicular to the first direction.

5. The power supply system according to claim 1, characterized in that: The power system also includes a panel and a control board; The panel is located on the side of the sealing plate away from the sealing cavity along the first direction; The control panel is located between the panel and the sealing plate.

6. The power supply system according to claim 5, characterized in that: The power system also includes terminals and a water tap; The wiring terminals and the water tap are respectively located on the side of the panel away from the control panel.

7. The power supply system according to claim 1, characterized in that: The power system also includes a waterproof plug and a communication plug, which are respectively disposed on the sealing plate; And / or, The power system also includes a vent valve, which is located in the housing.

8. The power supply system according to claim 1, characterized in that: There are two battery modules, which are distributed along a second direction; wherein the second direction intersects with the first direction. The battery module includes multiple battery cells, and the cooling channel is defined between adjacent battery cells. Each battery cell has a vent on the side away from the other battery module along the second direction.

9. The power supply system according to claim 8, characterized in that: The battery module also includes a first housing, a second housing, and a third housing; The first outer casing and the second outer casing are respectively located on both sides of the plurality of battery cells along the first direction; The third housing is located on the side of the plurality of cells away from the other battery module along the second direction.

10. The power supply system according to claim 8, characterized in that: The battery module also includes multiple adhesive strips, which are disposed between two adjacent battery cells along a third direction; The first direction, the second direction, and the third direction intersect each other.

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