Battery pack box body

Abstract

The utility model provides a battery pack box body and a manufacturing method thereof. The battery pack box body comprises a front side plate and a rear side plate, the water path plate is connected with the front side plate, a water path channel is arranged in the water path plate, and a plurality of grooves communicated with the water path channel are formed in the side face of the water path plate; the rear side plate is connected with the waterway plate on the side opposite to the side, connected with the front side plate, of the waterway plate; and a plurality of waterproof plugs, wherein the plurality of waterproof plugs respectively seal the groove between the waterway plate and the front side plate and seal the groove between the waterway plate and the rear side plate. The battery pack box body is simple in production and assembly structure, convenient and free of welding, and the risk of water seepage can be reduced.

Description

Technical field

[0001] The present application relates to a battery pack case and a method for manufacturing the same, and in particular to a battery pack case and a method for manufacturing the same that can prevent water seepage without welding. [Background Technology]

[0002] The new energy vehicle industry is currently experiencing rapid growth. The battery pack is a core component of new energy vehicles. Because the battery cells generate significant heat during operation, the water channel structure within the battery pack casing is crucial for dissipating heat. Existing battery pack casing water channel structures require welding during assembly. This process can create defects such as bubbles, cracks, unfused parts, and surface unevenness. These manufacturing defects can gradually expand during operation, leading to weld leaks. Once water seeps through the welds into the battery cells, a safety incident could occur.

[0003] In view of this, it is necessary to provide a battery pack case to solve the above technical problems. [Utility Model Content]

[0004] In order to solve the above-mentioned problems of the prior art, the purpose of the present application is to provide a battery pack case that can form a water channel structure without welding, thereby avoiding safety accidents that may be caused by water leakage in the welds.

[0005] In a first aspect, the present application provides a battery pack case, characterized in that it includes: a front side plate; a waterway plate connected to the front side plate, a waterway channel being provided in the waterway plate, and a plurality of grooves connected to the waterway channel being provided on the side of the waterway plate; a rear side plate connected to the waterway plate on the side opposite to the side where the waterway plate is connected to the front side plate; and a plurality of waterproof plugs, which respectively close the groove between the waterway plate and the front side plate and the groove between the waterway plate and the rear side plate.

[0006] In some embodiments of the present application, the waterproof plug has a protrusion that fits against the side wall of the water channel and has an inwardly concave arc surface, and the protrusion and the water channel form a diversion structure.

[0007] In some embodiments of the present application, a plurality of bolt fixing holes are further provided on the side of the waterway plate; the front side plate and the rear side plate are also fixed to the waterway plate by a plurality of fixing bolts passing through the front side plate and the rear side plate and locked into the plurality of bolt fixing holes.

[0008] In some embodiments of the present application, the plurality of bolt fixing holes are respectively arranged between two adjacent grooves.

[0009] In some embodiments of the present application, the waterway plate includes a bottom plate and a vertical plate perpendicular to the bottom plate, and the waterway channel is connected in the bottom plate and the vertical plate.

[0010] In some embodiments of the present application, waterproof glue is also applied between the waterproof plug and the front side plate and / or the rear side plate.

[0011] In some embodiments of the present application, the connection between the waterway plate and the front side plate and / or the rear side plate is also coated with the waterproof glue.

[0012] In some embodiments of the present application, the front side plate is provided with an inlet and outlet joint, and the front side plate connects the inlet and outlet joint with the water channel through a water flow channel that gradually narrows from one side of the front side plate to the side of the water channel plate.

[0013] In the second aspect, the present application also provides a method for manufacturing a battery pack case, comprising: inserting multiple waterproof plugs into multiple grooves of the waterway plate of the battery pack case; applying waterproof glue on the contact surface between the waterproof plugs and the grooves; connecting the waterway plate and the front side plate; connecting the waterway plate and the rear side plate; passing multiple fixing bolts through the front side plate and the rear side plate, and locking them into multiple bolt fixing holes on the two sides of the waterway plate, so that the front side plate and the rear side plate are respectively fixed on the two sides of the waterway plate; and applying the waterproof glue at the connection between the front side plate, the rear side plate and the waterway plate.

[0014] Compared with the prior art, the present application provides a battery pack case, which provides a plurality of grooves on the side of the waterway plate and seals the grooves with waterproof plugs, thereby sealing the openings at both ends of the waterway channel, thereby strengthening the waterproof effect of the waterway plate of the battery pack case without welding. In addition, the side of the waterway plate can also be provided with a plurality of bolt fixing holes, and the fixing bolts pass through the side of the waterway plate through the front and rear side plates to lock with the waterway plate, forming a plurality of fixing points in the battery pack case, which not only provides a plurality of structurally stable support points, but also effectively improves the tightness of the front and rear side plates and the waterway plate clamping waterproof plugs, thereby improving the waterproof performance. In addition, the plurality of bolt fixing holes are respectively provided between two adjacent grooves, which effectively disperses the structural stress of locking the front and rear side plates and the waterway plate to improve the sealing degree. In addition, the waterproof plug can also have a protrusion, which is conducive to cooperating with the waterway channel of the waterway plate to achieve a better diversion effect.

[0015] The following detailed description is made through specific embodiments in conjunction with the accompanying drawings, which will make it easier to understand the purpose, technical content, features and effects achieved by this application.

Brief Description of the Drawings

[0016] Figure 12 is a schematic diagram of an exploded view of a battery pack box according to an embodiment of the present application.

[0017] Figure 2 This is a top view of a waterway plate according to an embodiment of the present application.

[0018] Figure 3 It is a partial perspective view of an installation side of a waterway plate according to an embodiment of the present application.

[0019] Figure 4 This is a partial perspective view of another installation side of the waterway plate according to an embodiment of the present application.

[0020] Figure 5 This is a front view of the side panel before one embodiment of the present application.

[0021] Figure 6 This is a rear view of the side panel before one embodiment of the present application.

[0022] Figure 7 This is a cross-sectional view of the water flow channel at the installation point of the side panel and the waterway plate before one embodiment of the present application.

[0023] Figure 8 This is a partial view of the installation side of the side panel before one embodiment of the present application.

[0024] Figure 9 This is a partial perspective view of the combination of the waterway plate and the waterproof plug according to one embodiment of the present application.

[0025] Figure 10 This is a partial view of the combination of the waterway plate and the front side plate in one embodiment of the present application.

[0026] Figure 11 This is a schematic diagram of a battery pack box assembled by fixing bolts according to an embodiment of the present application.

[0027] Figure 12 This is a flow chart of a method for manufacturing a battery pack case provided in another aspect of the present application. [Specific implementation method]

[0028] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, rather than all the embodiments. In addition, it should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present application and are not intended to limit the present application.

[0029] Please refer to the accompanying drawings, in which the same or similar elements are represented by the same element numbers.

[0030] Reference Figure 1 、 Figure 2 and Figure 3 , Figure 1This is an exploded schematic diagram of a battery pack box according to an embodiment of the present application. Figure 2 In one embodiment of this application Figure 1 The top view of the waterway plate, Figure 3 This is a partial perspective view of an installation side of a waterway plate according to an embodiment of the present application. The battery pack case 1 provided in the present application includes: a front side plate 10; a waterway plate 20 connected to the front side plate 10, wherein a waterway channel W1 is provided in the waterway plate 20, and a plurality of grooves U1 connected to the waterway channel W1 are provided on the side of the waterway plate 20; a rear side plate 30 connected to the waterway plate 20 on the side opposite to the side where the waterway plate 20 is connected to the front side plate 10; and a plurality of waterproof plugs P1, wherein the plurality of waterproof plugs P1 respectively close the grooves U1 located between the waterway plate 20 and the front side plate 10, and the grooves U1 located between the waterway plate 20 and the rear side plate 30. These grooves U1 are located at the openings at both ends of the waterway channel W1. When the waterproof plugs P1 close the grooves U1, the openings at both ends of the waterway channel W1 are closed. These grooves U1 can be U-shaped grooves.

[0031] In one embodiment of the present application, the waterway plate 20 is formed by aluminum extrusion, wherein a plurality of bolt fixing holes H are reserved at the outer end of the partition of the waterway plate 20 .

[0032] Reference Figure 1 and Figure 3 , the side of the waterway plate 20 is also provided with a plurality of bolt fixing holes H; the front side plate 10 and the rear side plate 30 are also fixed to the waterway plate 20 by a plurality of fixing bolts F passing through the front side plate 10 and the rear side plate 30 and locked into the plurality of bolt fixing holes H.

[0033] By setting the waterproof plug P1 in the groove U1, a depression for accommodating the waterproof plug P1 can also be set in the groove U1. When the front side plate 10 and the rear side plate 30 are locked by multiple fixing bolts F, the waterproof plug P1 is accommodated in the depression of the groove U1, which can stabilize the position of the waterproof plug P1, thereby improving the tightness of the battery pack box 1.

[0034] Reference Figure 2 The waterproof plug P1 has a protrusion P11 with an inwardly concave arc surface that fits against the sidewall of the waterway W1. This protrusion P11 and the waterway W1 form a flow-guiding structure R1. Therefore, when coolant is injected into the waterway W1, the waterproof plug P1 increases the speed at which the water flows through the sidewall of the waterway W1, improving heat dissipation efficiency. This also prevents the problem of poor heat dissipation efficiency caused by coolant stagnation at the corners of the waterway W1.

[0035] Reference Figure 3 and Figure 4 , Figure 3and Figure 4 They are partial perspective views of the installation side of the waterway plate of an embodiment of the present application. In some embodiments of the present application, the multiple bolt fixing holes H are respectively arranged between two adjacent grooves U1. Furthermore, in some embodiments of the present application, the waterway plate 20 includes a bottom plate L1 and a vertical plate L2 perpendicular to the bottom plate L1, and the waterway channel W1 is connected within the bottom plate L1 and the vertical plate L2. In this case, only one water inlet and one water outlet are required, and the heat dissipation range of the waterway channel W1 includes the bottom and side surfaces, thereby expanding the heat dissipation range of the battery pack box.

[0036] Reference Figure 5 , Figure 5 This is a front view of the front side panel of an embodiment of the present application. In some embodiments of the present application, the front side panel 10 is provided with an inlet and outlet joint 11, and the front side panel 10 also has a front side panel through hole 12 for the fixing bolt F to pass through and aligned with the bolt fixing hole H. Figure 6 , Figure 6 This is a rear view of the front side panel of an embodiment of the present application, which reveals the structure of the side facing the waterway plate 20 when the front side panel 10 is connected to the waterway plate 20, wherein the through hole 12 of the front side panel is exposed, and during assembly, the protrusion 13 is aligned with the groove U1 to limit the groove U1.

[0037] In some embodiments of the present application, waterproof glue is applied to the connection between the waterproof plug P1 and the front panel 10 and / or the rear panel 30. This waterproof glue reinforces the gap between the waterproof plug P1 and the front panel 10 and / or the rear panel 30, further enhancing the waterproofing function. In some embodiments of the present application, the waterproof glue may also be applied to the connection between the waterway plate 20 and the front panel 10 and / or the rear panel 30 to further enhance waterproofing.

[0038] Further, refer to Figure 7 , Figure 7 This is a cross-sectional view of the water flow passage at the point where the front side panel and waterway panel are mounted in one embodiment of the present application. In this embodiment, the front side panel is provided with an inlet and outlet joint 11. A water flow passage W2, which gradually narrows from one side of the front side panel 10 to the other side of the waterway panel 20, connects the inlet and outlet joint 11 with the waterway passage W1 through an opening 111.

[0039] Reference Figure 8 , Figure 8 This is a partial view of the installation side of the front side plate of an embodiment of the present application, wherein the front side plate through hole 12 is arranged between two adjacent protrusions 13 to balance the stress on the protrusions 13. Figure 9 , Figure 9It is a partial perspective view of the combination of the waterway plate and the waterproof plug of an embodiment of the present application, wherein, when the waterproof plug P1 is inserted into the waterway plate 20, part of the waterway channel W1 (i.e., the area close to the front side plate 10 and the rear side plate 30) is filled with the waterproof plug P1, and the waterproof plug P1 is located between adjacent bolt fixing holes H, and the front side plate 10 and the rear side plate 30 are locked to the waterway plate 20 by the fixing bolts F. The inserted waterproof plug P1 is pressed against the front side plate 10 and the rear side plate 30, and the fixing bolts F between the two adjacent waterproof plugs P1 can make the force on the waterproof plug P1 more uniform, thereby increasing the sealing tightness of the battery pack box.

[0040] Reference Figure 10 and Figure 11 , Figure 10 This is a partial view of the combination of the waterway plate and the front side plate of an embodiment of the present application. Figure 11 This is a schematic diagram of a battery pack case assembled using fixing bolts F according to an embodiment of the present application. The water inlet and outlet connectors 11 are located on both sides of the front side panel 10. This means that coolant within the waterway panel 20 can flow in and out from one side of the front side panel 10. In this case, the rear side panel 30 does not need to be provided with the waterway openings 111 for receiving the water inlet and outlet connectors 11.

[0041] Reference Figure 12 , Figure 12 Flowchart of a method for manufacturing a battery pack box provided in another aspect of the present application, comprising:

[0042] S1: Insert multiple waterproof plugs into multiple grooves of the waterway plate of the battery pack box respectively.

[0043] At this time, the waterway plate 20 can seal the openings at both ends of the waterway channel W1 through the waterproof plug P1. The waterproof plug P1 can have a protrusion P11 with an inner concave arc surface that fits the side wall of the waterway channel W1. The protrusion P11 and the waterway channel W1 form a guide structure R1.

[0044] S2: Apply waterproof glue on the contact surface between the waterproof plug and the groove.

[0045] Through this process, the waterproof effect can be further achieved and the sealing effect of the water channel W1 can be strengthened.

[0046] S3: Connect the waterway plate and the front side plate.

[0047] S4: Connect the waterway plate and the rear side plate.

[0048] In processes S3 and S4, the protrusions 13 of the front side plate 10 and the rear side plate 30 can further press against the waterproof plug P1. In addition to promoting the sealing of the waterproof plug P1, it can also limit the relative positions of the front side plate 10, the rear side plate 30 and the waterway plate 20 to prevent the front side plate 10 and the rear side plate 30 from sliding and affecting the waterproof effect of the battery pack box.

[0049] S5: Pass a plurality of fixing bolts through the front side plate and the rear side plate and lock them into a plurality of bolt fixing holes on two side surfaces of the waterway plate, so that the front side plate and the rear side plate are respectively fixed to two side surfaces of the waterway plate.

[0050] By fixing the bolts F, the connection stability between the front side plate 10 and the waterway plate 20 , and between the rear side plate 30 and the waterway plate 20 is enhanced.

[0051] S6: Apply the waterproof glue at the connection between the front side plate, the rear side plate and the waterway plate.

[0052] Through this process, the battery pack case is further waterproofed at the junction of the inner front side panel, rear side panel and waterway plate, thereby enhancing the isolation effect between the coolant and the components inside the battery pack case.

[0053] Compared with the prior art, the present application provides a battery pack case, which provides a plurality of grooves on the side of the waterway plate and seals the grooves with waterproof plugs, thereby sealing the openings at both ends of the waterway channel, thereby strengthening the waterproof effect of the waterway plate of the battery pack case without welding. In addition, the side of the waterway plate can also be provided with a plurality of bolt fixing holes, and the fixing bolts pass through the side of the waterway plate through the front and rear side plates to lock with the waterway plate, forming a plurality of fixing points in the battery pack case, which not only provides a plurality of structurally stable support points, but also effectively improves the tightness of the front and rear side plates and the waterway plate clamping waterproof plugs, thereby improving the waterproof performance. In addition, the plurality of bolt fixing holes are respectively provided between two adjacent grooves, which effectively disperses the structural stress of locking the front and rear side plates and the waterway plate to improve the sealing degree. In addition, the waterproof plug can also have a protrusion, which is conducive to cooperating with the waterway channel of the waterway plate to achieve a better diversion effect.

[0054] It should be noted that the combination of the various elements in the present application preferably forms the above-mentioned multiple embodiments, but this should not be interpreted as a limitation to the present application, that is, the various elements in the present application can also have more combinations and are not limited to the above-mentioned multiple embodiments.

[0055] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only intended to help understand the technical solutions and core concepts of the present application. Those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents, and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack box, characterized in that: Include: front side panels; a waterway plate connected to the front side plate, wherein a waterway channel is provided in the waterway plate, and a plurality of grooves communicating with the waterway channel are provided on the side surface of the waterway plate; a rear side plate connected to the waterway plate at a side opposite to the side where the waterway plate is connected to the front side plate; as well as A plurality of waterproof plugs are provided, and the plurality of waterproof plugs respectively close the groove between the waterway plate and the front side plate and the groove between the waterway plate and the rear side plate.

2. The battery pack case according to claim 1, characterized in that: The waterproof plug has a protrusion that fits the side wall of the water channel and has an inwardly concave arc surface, and the protrusion and the water channel form a diversion structure.

3. The battery pack case according to claim 1, characterized in that: The side of the waterway plate is also provided with a plurality of bolt fixing holes; The front side plate and the rear side plate are further fixed to the waterway plate by a plurality of fixing bolts passing through the front side plate and the rear side plate and locked into the plurality of bolt fixing holes.

4. The battery pack case according to claim 3, characterized in that: The plurality of bolt fixing holes are respectively arranged between two adjacent grooves.

5. The battery pack case according to claim 1, characterized in that: The waterway plate includes a bottom plate and a vertical plate perpendicular to the bottom plate, and the waterway channel is connected in the bottom plate and the vertical plate.

6. The battery pack case according to claim 1, characterized in that: The connection between the waterproof plug and the front side plate and / or the rear side plate is also coated with waterproof glue.

7. The battery pack case according to claim 6, characterized in that: The connection between the waterway plate and the front side plate and / or the rear side plate is also coated with the waterproof glue.

8. The battery pack case according to claim 1, characterized in that: The front side plate is provided with an inlet and outlet joint, and the front side plate connects the inlet and outlet joint with the water channel through a water flow channel that gradually narrows from one side of the front side plate to one side of the water channel plate.

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