A battery pack housing and a battery pack assembly

Abstract

The utility model belongs to new energy battery technical field discloses a battery package shell and battery package assembly, and the battery package shell includes cold plate, shell frame and isolating cover, and the one side of cold plate is equipped with water nozzle, shell frame is sealedly connected with the one side of cold plate and is equipped with water nozzle and is surrounded to form the installation groove that can place battery, and shell frame is equipped with accommodation space, and the outer wall of shell frame is formed opening perpendicularly to cold plate, and water nozzle is located in accommodation space and is set up towards opening, isolating cover is sealedly connected with the inner wall of accommodation space and is covered in water nozzle, and isolating cover is sealedly connected with cold plate to cut off accommodation space and installation groove. Through setting up isolating cover, on the basis of hiding water nozzle, the sealing between shell frame and cold plate is improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a battery pack shell and a battery pack assembly. Background Technology

[0002] In the new energy field, using a cooling plate (hereinafter referred to as a cold plate) with internal coolant circulation to cool and heat the battery has become a common solution for thermal management of power batteries. To avoid interference between the water nozzle and the battery pack casing, current cold plates on the market usually have a protruding structure at the front, on which the water nozzle is arranged so that it fully extends out of the battery pack. This solution leads to an expansion of the battery pack's outer envelope, which imposes strict requirements on the vehicle's layout, requiring space to be reserved at the front of the vehicle to avoid it; moreover, the protruding part at the front of the cold plate also increases additional processing costs. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack housing that can hide the water nozzle and ensure a seal, thereby reducing layout requirements and processing costs.

[0004] To achieve this objective, the present invention adopts the following technical solution: a battery pack housing, comprising:

[0005] Cold plate, with a water tap on one side;

[0006] The housing frame is sealed to the side of the cold plate where the water nozzle is located and forms a mounting groove for placing the battery. The housing frame has an accommodating space with an opening on the outer wall of the housing frame perpendicular to the cold plate. The water nozzle is located in the accommodating space and is oriented toward the opening.

[0007] An isolation cover is sealed to the inner wall of the accommodating space and covers the water nozzle. The isolation cover is sealed to the cold plate to isolate the accommodating space from the mounting groove.

[0008] Preferably, the battery pack housing further includes a plurality of blind rivets, which are spaced apart circumferentially along the housing frame. The housing frame is riveted to the cold plate by the plurality of blind rivets, and the side of the housing frame facing the cold plate is sealed to the cold plate by sealant, which surrounds the mounting groove.

[0009] Preferably, the isolation cover includes an integrally formed cover body and a connecting part. The cover body and the inner wall of the accommodating space are matched in shape and sealed to the inner wall of the accommodating space. The connecting part is located outside the accommodating space. The connecting part is also riveted to the cold plate by the pop rivets. The side of the cover body and the connecting part facing the cold plate are sealed to the cold plate by sealant.

[0010] Preferably, the mounting groove is provided with a separator, which is sealed to the cold plate to divide the mounting groove into a first chamber and a second chamber. The second chamber is located between the first chamber and the accommodating space. The battery is fixed in the first chamber and the connecting part is located in the second chamber.

[0011] Preferably, the isolation cover and the shell frame are made of the same material and are both alloy parts, and the isolation cover and the shell frame are welded and fixed together.

[0012] Preferably, the isolation cover and the housing frame are made of different materials, and the outer peripheral wall of the isolation cover is sealed to the inner wall of the accommodating space by sealant.

[0013] Preferably, the outer peripheral wall of the water nozzle is provided with a positioning platform, the positioning platform is arranged around the water nozzle, the cold plate is provided with a through hole, the water nozzle is inserted into the through hole, and the positioning platform and the cold plate are welded and fixed to the side facing the housing frame.

[0014] Preferably, the housing frame is provided with a mounting panel, the mounting panel is connected to a plurality of terminals, the terminals are electrically connected to the battery, and the opening extends through the mounting panel along the wall thickness direction of the mounting panel.

[0015] Preferably, the faucet is connected to an inlet / outlet water interface, which is at least partially located within the accommodating space.

[0016] Another objective of this invention is to provide a battery pack assembly that reduces installation space requirements and ensures stable battery operation.

[0017] To achieve this objective, the present invention adopts the following technical solution: a battery pack assembly, including a cover, a battery module and the aforementioned battery pack housing, wherein the battery module is installed in the mounting groove, and the cover is sealed to the side of the housing frame away from the cold plate and covers the battery module.

[0018] The beneficial effects of this utility model are as follows: After the battery pack housing is assembled, the water nozzle is located within the accommodating space of the housing frame. This eliminates the need for a separate protruding structure on the front side of the cold plate to accommodate the water nozzle, reducing the impact of the water nozzle's fixed position on the battery pack's outer envelope, reducing the floor space required, and thus lowering layout requirements and processing costs. By setting an isolation cover, the housing frame and cold plate are sealed together, and the isolation cover is also sealed to the inner wall of the accommodating space and the cold plate. This seals the gap between the housing frame and the cold plate at the accommodating space, improving the sealing performance between the housing frame and the cold plate while concealing the water nozzle.

[0019] This utility model also provides a battery pack assembly that can complete the assembly of the lower housing while concealing the water inlet and ensuring a seal. This has minimal impact on the outer enclosure of the battery pack assembly, reduces the installation space requirements of the battery pack assembly in the vehicle, and ensures stable operation of the battery module. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery pack casing according to an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the isolation cover according to an embodiment of the present utility model;

[0022] Figure 3 This is a top view of the cold plate according to an embodiment of the present utility model;

[0023] Figure 4 This is a cross-sectional view of the isolation cover according to an embodiment of the present utility model;

[0024] Figure 5 This is an exploded view of the battery pack assembly according to an embodiment of the present invention.

[0025] In the diagram: 1. Cold plate; 11. Water tap; 111. Positioning platform; 112. Water inlet / outlet interface; 12. Second connection hole; 13. Through hole; 14. Refrigeration channel;

[0026] 2. Housing frame; 21. Mounting slot; 211. First chamber; 212. Second chamber; 22. Accommodation space; 23. Mounting panel; 231. Terminal block; 24. Divider; 241. Vertical beam; 242. Horizontal beam; 25. First connection hole;

[0027] 3. Isolation shield; 31. Shield body; 32. Connecting part;

[0028] 4. Blind rivets;

[0029] 5. Cover. Specific Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] Reference Figures 1 to 3As shown, a battery pack housing according to an embodiment of this application includes a cold plate 1, a housing frame 2, and an isolation cover 3. Two water nozzles 11 are provided on one side of the cold plate 1. One water nozzle 11 has an inlet channel, and the other water nozzle 11 has an outlet channel. A tortuous cooling channel 14 is provided inside the cold plate 1. The two water nozzles 11 are respectively connected to both ends of the cooling channel 14 within the cold plate 1 to allow refrigerant to enter and exit the cooling channel 14. The housing frame 2 is sealed to the side of the cold plate 1 where the water nozzles 11 are located, and the housing frame 2 also forms a mounting groove 21 for placing a battery. Optionally, the housing frame 2 can be a hollow square tube structure or a channel steel structure with openwork facing the mounting groove 21. The housing frame 2 has an accommodating space 22, which forms an opening on the outer wall of the housing frame 2 perpendicular to the cold plate 1. The water nozzles 11 are located within the accommodating space 22 and are positioned facing the opening. The isolation cover 3 is sealed to the inner wall of the accommodating space 22 and covers the water nozzle 11. The side of the isolation cover 3 facing the cold plate 1 is sealed to the cold plate 1, thereby isolating the accommodating space 22 and the mounting groove 21. It should be noted that the housing frame 2 has a hollow structure on the side facing the cold plate 1 through which the water nozzle 11 passes. In other words, the accommodating space 22 is hollowed out on the side facing the cold plate 1 so that the water nozzle 11 can pass through.

[0035] It is understandable that after the battery pack housing is assembled, the water nozzle 11 is located in the accommodating space 22 of the housing frame 2. There is no need to set a protruding structure on the front side of the cold plate 1 to separately arrange the water nozzle 11, thereby reducing the impact of the fixed position of the water nozzle 11 on the outer envelope of the battery pack, reducing the footprint, and thus reducing the layout requirements and processing costs.

[0036] By setting the isolation cover 3, the shell frame 2 is sealed to the cold plate 1, and the isolation cover 3 is also sealed to the inner wall of the accommodating space 22 and the cold plate 1. This can close the gap between the shell frame 2 and the cold plate 1 at the accommodating space 22, thereby improving the sealing performance between the shell frame and the cold plate 1 while concealing the water nozzle 11.

[0037] Currently, the cold plate 1 in the market is mainly made of aluminum, the water tap 11 is made of plastic or aluminum, and the shell frame 2 is made of aluminum or steel. When the cold plate 1 and the shell frame 2 are made of the same material, for example, when both the cold plate 1 and the shell frame 2 are made of aluminum, the cold plate 1 and the shell frame 2 can be welded and fixed together to ensure a seal.

[0038] Reference Figure 1 and Figure 5 As shown, when the materials of the cold plate 1 and the housing frame 2 are different, for example, when the cold plate 1 is made of aluminum and the housing frame 2 is made of steel, the battery pack housing also includes multiple blind rivets 4. The multiple blind rivets 4 are arranged at intervals along the circumference of the housing frame 2. The housing frame 2 is riveted to the cold plate 1 by the multiple blind rivets 4, and the side of the housing frame 2 facing the cold plate 1 is sealed to the cold plate 1 by sealant. The sealant is arranged around the mounting groove 21.

[0039] Specifically, the housing frame 2 is provided with multiple first connecting holes 25, which are arranged at intervals along the circumference of the housing frame 2. The cold plate 1 is provided with multiple second connecting holes 12. The blind rivets 4, the second connecting holes 12, and the first connecting holes 25 are set in a one-to-one correspondence. When connecting the cold plate 1 and the housing frame 2, the cold plate 1 and the housing frame 2 need to be bonded together with sealant firstly, and then the multiple blind rivets 4 are inserted into the corresponding first connecting holes 25 and the corresponding second connecting holes 12. The rivet shank is then pulled out, thus achieving a sealed and fixed connection between the cold plate 1 and the housing frame 2.

[0040] The cold plate 1 and the housing frame 2 are fastened by multiple blind rivets 4. There are no strict requirements on the materials of the cold plate 1 and the housing. This can overcome the problem that the materials of the housing frame 2 and the cold plate 1 are different and cannot be welded. Furthermore, based on the use of sealant, the connection strength between the housing frame 2 and the cold plate 1 is effectively improved, avoiding problems such as tearing failure of the sealant under external impact of the battery pack. This effectively improves the structural stability of the battery pack housing.

[0041] Reference Figure 2 As shown, it can be understood that the isolation cover 3 includes an integrally formed cover body 31 and a connecting part 32. The cover body 31 and the inner wall of the accommodating space 22 are matched in shape and sealed to the inner wall of the accommodating space 22. The connecting part 32 is a plate-shaped structure that is parallel to the cold plate 1 and arranged along the edge of the cover body 31. The connecting part 32 is located on the side of the isolation cover 3 away from the opening and outside the accommodating space 22. The connecting part 32 is also riveted to the cold plate 1 by pop rivets 4. There are two or three pop rivets 4 on the connecting part 32. The two or three pop rivets 4 are arranged circumferentially at intervals along the connecting part 32. The side of the cover body 31 connecting part 32 facing the cold plate 1 is sealed to the cold plate 1 by sealant.

[0042] By setting the connecting part 32, the contact area between the isolation cover 3 and the cold plate 1 can be increased, providing support for the fixed installation of the core-pulling rivet 4, and effectively improving the connection stability and sealing between the isolation cover 3 and the cold plate 1.

[0043] It should be noted that, along the opening direction of the shell frame 2 (X direction in the figure), the connecting part 32 is spaced apart from the opening of the shell frame 2, and the spacing distance is equal to the width of the side wall of the shell frame 2 facing the cold plate 1 on both sides of the opening. This allows the side wall of the shell frame 2 facing the cold plate 1 to be joined with the connecting part 32 on both sides of the isolation cover 3 to form a smooth thin-wall structure. Through the above arrangement, the side wall of the shell frame 2 facing the cold plate 1 can limit the connecting part 32, thereby achieving the initial positioning of the isolation cover 3. This is specifically mentioned here to avoid misunderstanding.

[0044] Depending on the material of the isolation cover 3, there are two connection methods between the isolation cover 3 and the shell frame 2, as shown in the following specific embodiments:

[0045] Example 1

[0046] The isolation cover 3 and the shell frame 2 are made of the same material and are both alloy parts. For example, when the isolation cover 3 and the shell frame 2 are both aluminum parts, the isolation cover 3 and the shell frame 2 are welded and fixed.

[0047] Provided that the materials are the same and both are alloy parts, the isolation cover 3 and the shell frame 2 can be directly welded and fixed during assembly, which can not only ensure the sealing and structural strength, but also simplify the connection structure between the isolation cover 3 and the shell frame 2 and reduce production costs.

[0048] Example 2

[0049] When the isolation cover 3 and the housing frame 2 are made of different materials, for example, when the isolation cover 3 is made of plastic and the housing frame 2 is made of aluminum, the outer peripheral wall of the isolation cover 3 is sealed to the inner wall of the accommodating space 22 by sealant.

[0050] When the isolation cover 3 and the housing frame 2 are made of different materials, use sealant to attach the isolation cover 3 into the accommodating space 22 to ensure the airtightness between the isolation cover 3 and the housing frame 2.

[0051] Continue to refer to Figure 1 As shown, it can be understood that a partition 24 is provided within the mounting groove 21. Optionally, the partition 24 includes at least one vertical beam 241 arranged along the X direction and at least one horizontal beam 242 arranged along the Y direction. Both ends of the vertical beam 241 and both ends of the horizontal beam 242 are welded and fixed to the inner wall of the mounting groove 21, and both the side of the vertical beam 241 facing the cold plate and the side of the horizontal beam 242 facing the cold plate are connected to the cold plate by sealant and pop rivets. The partition 24 is sealed to the cold plate 1 to divide the mounting groove 21 into a first chamber 211 and a second chamber 212. In this embodiment, the partition 24 includes one vertical beam 241 and three horizontal beams 242, the three horizontal beams 242 are spaced apart along the X direction, and the vertical beam 241 is located in the middle section of the three horizontal beams 242 along the Y direction and is arranged to intersect with the middle horizontal beam 242. A vertical beam 241 and three horizontal beams 242 cooperate to divide the mounting slot 21 into four first chambers 211 and one second chamber 212. The first chamber 211 matches the shape of the battery and the battery is fixed in the first chamber 211. The second chamber 212 is located between the first chamber 211 and the accommodating space 22. The connecting part 32 is located in the second chamber 212. The second chamber 212 is equipped with a controller, sensor, etc. that are electrically connected to the battery, which will not be described in detail here.

[0052] By setting the separator 24, the mounting slot 21 is divided into a first chamber 211 for installing the battery and a second chamber 212 for installing other components, which effectively improves the space utilization of the mounting slot 21 and improves the installation stability of the battery. The connecting part 32 is set in the second chamber 212 to avoid the connecting part 32 from affecting the battery installation, further improving the space utilization of the mounting slot 21.

[0053] Continue to refer to Figure 1 and Figure 5 As shown, the housing frame 2 is provided with a mounting panel 23, and the mounting panel 23 is connected to a plurality of terminals 231. Optionally, the mounting panel 23 and the terminals 231 can be detachably connected by a snap-fit ​​structure, a plug-in structure, a bolt structure, or the like. The terminals 231 are electrically connected to the battery, and their openings extend through the mounting panel 23 along the wall thickness direction. In some embodiments, there are multiple terminals 231, and the multiple terminals and the water nozzle 11 are arranged at intervals along the length direction (Y direction in the figure) of the mounting panel 23.

[0054] The opening of the accommodating space 22 is made on the mounting panel 23 of the housing frame 2, so that the coolant pipe connected to the water nozzle 11 and the cable connected to the terminal 231 are concentrated on the same side of the housing frame 2, which facilitates the user to connect, use and debug each pipeline, effectively improves the integration of the battery pack housing, reduces the maintenance cost of the battery pack housing in the later stage, and further reduces the footprint of the battery pack housing.

[0055] Reference Figure 3 and Figure 4 As shown, it can be understood that the water tap 11 is connected to an inlet / outlet interface 112, which is a rectangular block with two interfaces. Two water taps 11 are connected to the same inlet / outlet interface 112 and communicate with the two interfaces respectively. The inlet / outlet interface 112 is at least partially located within the receiving space 22. Optionally, the inlet / outlet interface 112 can be entirely housed within the receiving space 22 or can partially protrude outside the receiving space 22.

[0056] By setting the inlet and outlet water interfaces 112, the water tap 11 can be easily connected to external pipes, improving the ease of use of the water tap 11.

[0057] Reference Figure 4 As shown, it can be understood that each water nozzle 11 has a positioning platform 111 on its outer peripheral wall. The positioning platform 111 is arranged around the water nozzle 11. The cold plate 1 has a through hole 13. The water nozzle 11 is inserted into the through hole 13 and the positioning platform 111 and the cold plate 1 are welded and fixed to the side facing the housing frame 2.

[0058] By setting up the positioning platform 111, on the one hand, the positioning platform 111 can position the water nozzle 11 to prevent the water nozzle 11 from being inserted too deeply and affecting the flow of coolant; on the other hand, the positioning platform 111 can increase the contact area between the water nozzle 11 and the side wall of the cold plate 1, which facilitates the welding and fixing of the water nozzle 11 and improves the sealing between the water nozzle 11 and the cold plate 1.

[0059] Reference Figure 5 As shown, a battery pack assembly provided according to an embodiment of this application includes a cover 5, a battery module and the aforementioned battery pack housing. The battery module is installed in the mounting groove 21, and the cover 5 is sealed to the side of the housing frame 2 away from the cold plate 1 and covers the battery module.

[0060] It should be noted that the sealing connection between the cover 5 and the housing frame 2 can refer to the previous description of the sealing connection between the cold plate 1 and the housing frame 2. That is, the cover 5 and the side facing the housing frame 2 are also connected to the housing frame 2 by sealant and pop rivets 4. The cover 5, the housing frame 2 and the cold plate 1 can be connected by the same set of pop rivets 4 to improve the overall structural stability of the battery pack assembly.

[0061] It is understandable that by using sealant and blind rivets 4 to connect the cover 5, the housing frame 2 and the cold plate 1, and by setting an isolation cover 3 to separate the accommodating space 22 and the mounting groove 21, the assembly of the lower battery pack housing can be completed while hiding the water nozzle 11 and ensuring a seal. This has a smaller impact on the outer envelope of the battery pack assembly, reduces the installation space requirements of the battery pack assembly of the whole vehicle, and ensures the stable operation of the battery module.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery pack housing, characterized in that, include: Cold plate (1), with a water tap (11) on one side; The housing frame (2) is sealed to the side of the cold plate (1) where the water nozzle (11) is located and forms an installation groove (21) for placing the battery. The housing frame (2) is provided with a receiving space (22). The receiving space (22) forms an opening on the outer wall of the housing frame (2) perpendicular to the cold plate (1). The water nozzle (11) is located in the receiving space (22) and is positioned towards the opening. An isolation cover (3) is sealed to the inner wall of the accommodating space (22) and covers the water nozzle (11). The isolation cover (3) is sealed to the cold plate (1) to isolate the accommodating space (22) and the mounting groove (21).

2. The battery pack housing according to claim 1, characterized in that, The battery pack housing also includes a plurality of blind rivets (4), which are spaced apart circumferentially along the housing frame (2). The housing frame (2) is riveted to the cold plate (1) by the plurality of blind rivets (4), and the side of the housing frame (2) facing the cold plate (1) is sealed to the cold plate (1) by sealant, which is arranged around the mounting groove (21).

3. The battery pack housing according to claim 2, characterized in that, The isolation cover (3) includes an integrally formed cover body (31) and a connecting part (32). The cover body (31) and the inner wall of the accommodating space (22) are matched in shape and sealed to the inner wall of the accommodating space (22). The connecting part (32) is located outside the accommodating space (22). The connecting part (32) is also riveted to the cold plate (1) by the core-pulling rivet (4). The side of the cover body (31) and the connecting part (32) facing the cold plate (1) are sealed to the cold plate (1) by sealant.

4. The battery pack housing according to claim 3, characterized in that, The mounting groove (21) is provided with a separator (24), which is sealed to the cold plate (1) to divide the mounting groove (21) into a first chamber (211) and a second chamber (212). The second chamber (212) is located between the first chamber (211) and the accommodating space (22). The battery is fixed in the first chamber (211), and the connecting part (32) is located in the second chamber (212).

5. The battery pack housing according to any one of claims 1-3, characterized in that, The isolation cover (3) and the shell frame (2) are made of the same material and are both alloy parts. The isolation cover (3) and the shell frame (2) are welded and fixed.

6. The battery pack housing according to any one of claims 1-3, characterized in that, The isolation cover (3) and the shell frame (2) are made of different materials. The outer peripheral wall of the isolation cover (3) is sealed to the inner wall of the accommodating space (22) by sealant.

7. The battery pack housing according to any one of claims 1-3, characterized in that, The outer peripheral wall of the water nozzle (11) is provided with a positioning platform (111), the positioning platform (111) is arranged around the water nozzle (11), the cold plate (1) is provided with a through hole (13), the water nozzle (11) is inserted into the through hole (13), and the positioning platform (111) and the cold plate (1) are welded and fixed to the side facing the housing frame (2).

8. The battery pack housing according to any one of claims 1-3, characterized in that, The housing frame (2) is provided with a mounting panel (23), and the mounting panel (23) is connected with a plurality of terminals (231). The terminals (231) are electrically connected to the battery, and the opening extends through the mounting panel (23) along the wall thickness direction.

9. The battery pack housing according to any one of claims 1-3, characterized in that, The faucet (11) is connected to an inlet / outlet water interface (112), which is at least partially located within the accommodating space (22).

10. A battery pack assembly, comprising a cover (5), a battery module and a battery pack housing according to any one of claims 1-9, wherein the battery module is installed in the mounting groove (21), and the cover (5) is sealed to the side of the housing frame (2) away from the cold plate (1) and covers the battery module.

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