Battery pack shell, battery pack and vehicle

Abstract

The utility model relates to the field of power batteries, and discloses a battery pack shell, a battery pack and a vehicle, the battery pack shell comprises a first shell, a second shell, a first sealing foam and a first fastener, the periphery of the first shell is provided with a first side coaming, the periphery of the second shell is provided with a second side coaming, and the first shell and the second shell are oppositely arranged and provided with a first gap; the first sealing foam is arranged in the first gap, the first shell and the second shell are sealed through the first sealing foam, and the first shell and the second shell are installed through the first fastener. The battery pack shell has the advantages that the battery pack shell is installed through the fastener, the first sealing foam arranged between the first side coaming and the second side coaming can simply and effectively achieve sealing between the first side coaming and the second side coaming, the sealing effect is remarkable, the sealing performance in the battery pack is guaranteed, and the standard sealing requirement of the battery pack can be met.

Description

Technical Field

[0001] The utility model relates to the field of power batteries, in particular to a battery pack shell, a battery pack and a vehicle. Background Art

[0002] As the power source of electric vehicles, battery packs feature high energy density, high voltage, and high energy. They contain electrical components such as battery cells and high-voltage wiring. Water ingress and short circuits can create fire and explosion hazards. Therefore, sealing is a crucial factor in achieving battery pack safety goals. Battery packs that integrate the battery and body offer advantages such as high energy density, lightweight design, and a small Z-axis footprint, and are becoming a mainstream technology solution for automakers.

[0003] Existing battery packs often use the vehicle body floor as the upper shell, with the sealing strip directly adhered to the lower shell, and the lower shell is installed on the vehicle body floor, so that the sealing strip adheres between the upper shell and the lower shell. However, this sealing method has poor sealing effect and cannot meet the battery pack sealing standard requirements. Utility Model Content

[0004] The purpose of this application is to provide a battery pack housing, a battery pack and a vehicle to achieve reliable sealing between the battery pack and the vehicle body and the battery pack.

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] A battery pack housing, comprising: a first housing, a second housing, a first sealing foam, and a first fastener, wherein the first housing comprises a first cover plate and a first side panel connected to an outer periphery of the first cover plate, and the second housing comprises a second cover plate and a second side panel connected to an outer periphery of the second cover plate, wherein the first cover plate and the second cover plate are disposed opposite each other and define an accommodating space therebetween for accommodating a battery body;

[0007] The first side panel and the second side panel are arranged opposite to each other with a first gap therebetween. A first mounting hole is formed on the first side panel, and a second mounting hole corresponding to the first mounting hole is formed on the second side panel. The first sealing foam ring is arranged in the first gap, and the first sealing foam is closer to the accommodating space than the first mounting hole or the second mounting hole.

[0008] The first fastener is passed through the first mounting hole and the second mounting hole to fixedly connect the first side panel and the second side panel.

[0009] The battery pack shell has a significant sealing effect, ensuring the sealing performance inside the battery pack and meeting the battery pack sealing standard requirements.

[0010] In some embodiments of the present application, a first pad is further included, which is arranged between the first mounting hole and the second mounting hole, and the first fastener is passed through the first mounting hole, the first pad and the second mounting hole to fixedly connect the first side panel and the second side panel.

[0011] The first cushion block can maintain the gap between the first side panel and the second side panel, ensure the compression rate of the first sealing foam, and improve the installation strength at the installation hole position.

[0012] In some embodiments of the present application, the thickness of the first pad is less than the thickness of the first sealing foam when it is not deformed.

[0013] This ensures that the first side panel and the second side panel can compress the first sealing foam during installation, so that the first sealing foam can achieve a sealing function.

[0014] In some embodiments of the present application, the first gap is 2 mm-3 mm.

[0015] This avoids the problem of over-compression of the first sealing foam, while also preventing the problem of insufficient sealing due to insufficient compression.

[0016] In some embodiments of the present application, the compression rate of the first sealing foam is 40%-60%.

[0017] This ensures that the compression rate of the first sealing foam is within an appropriate range, further enhancing the installation performance and sealing performance.

[0018] In some embodiments of the present application, the number of the first fasteners, the first mounting holes, and the second mounting holes are all multiple, and the three correspond one to one. The multiple first mounting holes are arranged at intervals along the circumference of the first side panel, and the multiple second mounting holes are arranged at intervals along the circumference of the second side panel.

[0019] This ensures the installation strength and reliability between the upper and lower shells of the battery pack.

[0020] A battery pack includes a battery module and the battery pack housing as described above, wherein the battery module is arranged in the accommodating space.

[0021] The battery module can be used to store and release electrical energy, and the battery pack shell can protect the battery module.

[0022] A vehicle comprises a rocker beam and a battery pack as described above, wherein the battery pack is fixed to the rocker beam via the first side panel and the second side panel.

[0023] It realizes the reliable connection between the battery pack and the vehicle body, achieving the purpose of battery-body integration, and has the advantages of high energy density, good lightweight effect, and small longitudinal space occupation.

[0024] In some embodiments of the present application, a second sealing foam and a second fastener are further included. The door sill is provided on a side of the first side panel away from the second side panel, and a second gap is defined between the door sill and the first side panel. The second sealing foam is provided in the second gap.

[0025] A third mounting hole is also provided on the first side panel, and a fourth mounting hole corresponding to the third mounting hole is also provided on the second side panel, and the second sealing foam is closer to the first cover plate than the third mounting hole, and the second fastener is passed through the fourth mounting hole and the third mounting hole to fix the battery pack on the door sill beam.

[0026] The battery pack and the vehicle body sill beam are installed with a second fastener and sealed with a second sealing foam, which simply, conveniently and reliably achieves the installation and sealing between the battery pack and the sill beam, ensuring the sealing of the passenger compartment.

[0027] In some embodiments of the present application, a second pad is further included, the aperture of the third mounting hole is larger than the aperture of the fourth mounting hole, the second pad is arranged on the second side panel, and the second pad passes through the third mounting hole and abuts against the door sill beam, and the second fastener is passed through the fourth mounting hole and the second pad to fix the battery pack on the door sill beam.

[0028] The second pad can maintain the gap between the door sill beam and the second side panel, ensure the compression rate of the second sealing foam, and improve the installation strength at the installation hole position.

[0029] In some embodiments of the present application, the second gap is 3 mm-7 mm.

[0030] This avoids the problem of over-compression of the second sealing foam, while also preventing the problem of insufficient sealing due to insufficient compression.

[0031] In some embodiments of the present application, the compression rate of the second sealing foam is 40%-60%.

[0032] This ensures that the compression rate of the second sealing foam is within an appropriate range, further enhancing the installation performance and sealing performance.

[0033] Compared with the prior art, the battery pack shell, battery pack and vehicle of the present application have the following technical effects: the first cover plate and the second cover plate are used to enclose the power battery body, and the first side panel and the second side panel are respectively arranged around the two cover plates. The first fastener is passed through the first mounting hole and the second mounting hole to install the first shell and the second shell to realize the installation of the battery pack shell, and the first sealing foam arranged between the first side panel and the second side panel can simply and effectively realize the sealing between the two, and the sealing effect is significant, which ensures the sealing performance inside the battery pack and can meet the battery pack sealing standard requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the installation structure of the battery pack of this application;

[0035] Figure 2 This is a schematic diagram of the installation structure of the battery pack and the door sill beam of this application;

[0036] Figure 3 This is a schematic diagram of the connection position between the battery pack and the door sill beam of the present application.

[0037] In the figure, 1. battery pack shell; 11. first shell; 111. first cover plate; 112. first side panel; 113. first mounting hole; 114. third mounting hole; 12. second shell; 121. second cover plate; 122. second side panel; 123. second mounting hole; 124. fourth mounting hole; 13. first sealing foam; 14. first fastener; 15. accommodating space; 16. first gap; 17. first pad; 2. door sill beam; 3. second sealing foam; 4. second fastener; 5. second gap; 6. second pad. DETAILED DESCRIPTION

[0038] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] like Figure 1As shown, the first aspect of the embodiment of the present application provides a battery pack shell 1, comprising: a first shell 11, a second shell 12, a first sealing foam 13 and a first fastener 14, the first shell 11 comprises a first cover plate 111 and a first side panel 112 connected to the outer periphery of the first cover plate 111, the second shell 12 comprises a second cover plate 121 and a second side panel 122 connected to the outer periphery of the second cover plate 121, the first cover plate 111 and the second cover plate 121 are arranged opposite to each other, and a receiving space 15 for accommodating the battery body is formed between the two; the first side panel 112 and the second side panel 121 are arranged opposite to each other, and a receiving space 15 for accommodating the battery body is formed between the two; 2 are arranged opposite to each other with a first gap 16 therebetween. A first mounting hole 113 is defined on the first side panel 112, and a second mounting hole 123 corresponding to the first mounting hole 113 is defined on the second side panel 122. The first sealing foam 13 is disposed in an annular manner within the first gap 16, and is closer to the accommodating space 15 than the first mounting hole 113 or the second mounting hole 123. The first fastener 14 is passed through the first mounting hole 113 and the second mounting hole 123 to securely connect the first side panel 112 and the second side panel 122.

[0040] Based on the above technical solution, the battery pack shell 1 of the present application includes a first cover plate 111 and a second cover plate 121 for enclosing the power battery body. A first side panel 112 and a second side panel 122 are respectively provided around the periphery of the two cover plates. The first fastener 14 is passed through the first mounting hole 113 and the second mounting hole 123 to install the first shell 11 and the second shell 12, thereby achieving installation of the battery pack shell. The first sealing foam 13 provided between the first side panel 112 and the second side panel 122 can simply and effectively achieve a seal between the two, and is more suitable for sealing the first side panel 112 and the second side panel 122 that are arranged in parallel and opposite to each other, thereby ensuring the sealing performance inside the battery pack. It is particularly suitable for battery packs with sheet metal shells. It should be noted that the first side panel 112 and the second side panel 122 are preferably formed into a flat surface by stamping, and the width can be flexibly selected according to the sealing and installation dimensions. In addition, the first fastener 14 is preferably a bolt, which has high installation reliability and low cost.

[0041] In some embodiments of the present application, Figure 1As shown, the battery pack housing 1 of this embodiment further includes a first spacer 17, which is disposed between the first mounting hole 113 and the second mounting hole 123. The first fastener 14 is disposed through the first mounting hole 113, the first spacer 17, and the second mounting hole 123 to securely connect the first side panel 112 and the second side panel 122. The first spacer 17 maintains the installation distance between the first side panel 112 and the second side panel 122 at the height of the first spacer 17, thereby ensuring a compression gap for the first sealing foam 13 between the first housing 11 and the second housing 12, and preventing excessive compression of the sealing foam.

[0042] Specifically, such as Figure 1 As shown, the thickness of the first cushion block 17 is less than the thickness of the first sealing foam 13 when it is not deformed. The thickness of the first cushion block 17 is less than the initial thickness of the first sealing foam 13, which ensures that the first side panel 112 and the second side panel 122 can compress the first sealing foam 13 during installation, allowing the first sealing foam 13 to perform its sealing function.

[0043] In some embodiments of the present application, Figure 1 As shown, the first gap 16 is 2 mm to 3 mm. The distance between the first side panel 112 and the second side panel 122 is between 2 mm and 3 mm, which can ensure the compression gap of the first sealing foam 13 and avoid the problem of over-compression while preventing the problem of insufficient sealing due to insufficient compression.

[0044] In some embodiments of the present application, Figure 1 As shown, the compression rate of the first sealing foam 13 is 40%-60%. When the compression rate of the first sealing foam 13 is within this range, it can better balance the installation performance and sealing performance, and the compression rate is preferably 50%, which further enhances the installation performance and sealing performance.

[0045] In some embodiments of the present application, Figure 1 As shown, there are multiple first fasteners 14, multiple first mounting holes 113, and multiple second mounting holes 123, each corresponding to the first fasteners 14 and the first mounting holes 113. Multiple first mounting holes 113 are spaced apart along the circumference of the first side panel 112, and multiple second mounting holes 123 are spaced apart along the circumference of the second side panel 122. The multiple corresponding first fasteners 14, first mounting holes 113, and second mounting holes 123 are spaced apart to ensure the mounting strength between the upper and lower shells of the battery pack.

[0046] A second aspect of the present application provides a battery pack comprising a battery module and the aforementioned battery pack housing 1, wherein the battery module is disposed within the accommodating space 15. The battery module in the battery pack can be used to store and release electrical energy, while the battery pack housing protects the battery module and prevents it from being exposed.

[0047] like Figure 2 As shown, a third aspect of the present application provides a vehicle comprising a rocker beam 2 and the aforementioned battery pack. The battery pack secures the first and second side panels 112, 122 to the rocker beam 2 via a connecting device. By securing the first and second side panels 112, 122 to the rocker beam 2, a reliable connection between the battery pack and the vehicle body is achieved, achieving battery-body integration. This vehicle exhibits advantages such as high energy density, excellent lightweighting, and a small longitudinal footprint.

[0048] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the vehicle of this embodiment further includes a second sealing foam 3 and a second fastener 4. The sill beam 2 is disposed on the side of the first side panel 112 away from the second side panel 122, with a second gap 5 defined between the sill beam 2 and the first side panel 112. The second sealing foam 3 is disposed within the second gap 5. A third mounting hole 114 is also defined in the first side panel 112, and a fourth mounting hole 124 corresponding to the third mounting hole 114 is also defined in the second side panel 122. The second sealing foam 3 is closer to the first cover plate 111 than the third mounting hole 114. The second fastener 4 is inserted through the fourth mounting hole 124 and the third mounting hole 114 to secure the battery pack to the sill beam 2. The second fastener 4 is used to secure the battery pack to the vehicle body sill beam 2, and the second sealing foam 3 is used for sealing. This allows for simple, convenient, and reliable installation and sealing between the battery pack and the sill beam 2, ensuring a sealed passenger compartment. Because the first and second housings 11, 12 of the battery pack are already assembled using the first fasteners 14 and sealed using the first sealing foam 13, no additional design is required for the installation and sealing of this portion. Simply adding additional mounting and sealing structures is sufficient, resulting in a simple structure, tight connection, and reliable sealing. Preferably, the second fasteners 4 utilize a bolt-and-nut assembly method, enabling a simple and reliable connection between the sill beam 2 and the battery pack.

[0049] In some embodiments of the present application, Figure 2 and Figure 3As shown, the vehicle of this embodiment further includes a second pad 6. The diameter of the third mounting hole 114 is larger than the diameter of the fourth mounting hole 124. The second pad 6 is disposed on the second side panel 122 and passes through the third mounting hole 114 to abut against the sill beam 2. The second fastener 4 is passed through the fourth mounting hole 124 and the second pad 6 to secure the battery pack to the sill beam 2. The second pad 6 maintains the gap between the sill beam 2 and the second side panel 122 at the height of the second pad 6, thereby ensuring a compression gap for the sealing foam between the vehicle body and the battery pack and preventing excessive compression of the sealing foam. Furthermore, because the second pad 6 is positioned in close contact with the mounting hole, it effectively improves the structural strength of the mounting hole location and prevents damage thereto.

[0050] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the rocker beam 2, the first side panel 112, and the second side panel 122 are sequentially connected from top to bottom. Since the first side panel 112 is arranged to protrude from the side of the entire battery pack, the rocker beam 2, the first side panel 112, and the second side panel 122 of the present application are sequentially installed from top to bottom, taking into account the installation position of the battery pack. This ensures the rationality of the battery pack installation position while further improving the overall vehicle installation performance and sealing performance.

[0051] In some embodiments of the present application, Figure 2 As shown, the second gap 5 between the sill beam 2 and the first side panel 112 is 3 mm to 7 mm. The distance between the sill beam 2 and the first side panel 112 is preferably 5 mm, with a 2 mm vertical floating distance. This gap within this range ensures a compression gap for the second sealing foam 3, preventing over-compression while also preventing insufficient sealing due to insufficient compression.

[0052] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the compression rate of the second sealing foam 3 is 40%-60%. When the compression rate of the second sealing foam 3 is within this range, it can better balance the installation performance and sealing performance, and the compression rate is preferably 50%, which further enhances the installation performance and sealing performance.

[0053] In summary, the battery pack shell, battery pack and vehicle of the present application, the first cover plate 111 and the second cover plate 121 are used to enclose the power battery body, and the first side panel 112 and the second side panel 122 are respectively arranged around the two cover plates, and the first fastener 14 is used to pass through the first mounting hole 113 and the second mounting hole 123 to install the first shell 11 and the second shell 12 to achieve the installation of the battery pack shell, and the first sealing foam 13 set between the first side panel 112 and the second side panel 122 can simply and effectively achieve the sealing between the two, and is more suitable for the sealing of the first side panel 112 and the second side panel 122 set in parallel and opposite to each other, ensuring the sealing performance inside the battery pack, and is particularly suitable for the battery pack field of sheet metal shells; in addition, in the vehicle of the present application, the second fastener 4 is used to install the battery pack and the vehicle body rocker beam 2, and the second sealing foam 3 is used for sealing, so that the installation and sealing between the battery pack and the rocker beam 2 can be simply, conveniently and reliably achieved, ensuring the sealing of the passenger compartment.

[0054] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. A battery pack housing, characterized in that: include: A first housing, a second housing, a first sealing foam, and a first fastener, wherein the first housing includes a first cover plate and a first side panel connected to the outer periphery of the first cover plate, and the second housing includes a second cover plate and a second side panel connected to the outer periphery of the second cover plate, the first cover plate and the second cover plate being arranged opposite to each other, and forming an accommodating space therebetween for accommodating the battery body; The first side panel and the second side panel are arranged opposite to each other with a first gap therebetween. A first mounting hole is formed on the first side panel, and a second mounting hole corresponding to the first mounting hole is formed on the second side panel. The first sealing foam ring is arranged in the first gap, and the first sealing foam is arranged between the first mounting hole or the second mounting hole and the accommodating space. The first fastener is passed through the first mounting hole and the second mounting hole to fixedly connect the first side panel and the second side panel.

2. The battery pack housing according to claim 1, wherein: It also includes a first pad, which is arranged between the first mounting hole and the second mounting hole, and the first fastener is passed through the first mounting hole, the first pad and the second mounting hole to fixedly connect the first side panel and the second side panel.

3. The battery pack housing according to claim 2, wherein: The thickness of the first cushion block is smaller than the thickness of the first sealing foam when it is not deformed.

4. The battery pack housing according to claim 1, wherein: The first gap is 2mm-3mm.

5. The battery pack housing according to claim 1, wherein: The compression rate of the first sealing foam is 40%-60%.

6. The battery pack housing according to claim 1, wherein: The number of the first fasteners, the first mounting holes and the second mounting holes are all multiple, and the three correspond one to one. The multiple first mounting holes are arranged at intervals along the circumference of the first side panel, and the multiple second mounting holes are arranged at intervals along the circumference of the second side panel.

7. A battery pack, characterized in that: It comprises a battery module and a battery pack shell according to any one of claims 1 to 6, wherein the battery module is arranged in the accommodating space.

8. A vehicle, characterized in that: The invention comprises a door sill beam and a battery pack as claimed in claim 7, wherein the battery pack fixes the first side panel and the second side panel to the door sill beam through a connecting device.

9. The vehicle according to claim 8, characterized in that It also includes a second sealing foam and a second fastener. The threshold beam is arranged on a side of the first side panel away from the second side panel, and a second gap is formed between the threshold beam and the first side panel. The second sealing foam is arranged in the second gap.

10. The vehicle according to claim 9, characterized in that A third mounting hole is also provided on the first side panel, and a fourth mounting hole corresponding to the third mounting hole is also provided on the second side panel, and the second sealing foam is closer to the first cover plate than the third mounting hole, and the second fastener is passed through the fourth mounting hole and the third mounting hole to fix the battery pack on the door sill beam.

11. The vehicle according to claim 10, characterized in that It also includes a second pad, the aperture of the third mounting hole is larger than the aperture of the fourth mounting hole, the second pad is arranged on the second side panel, and the second pad passes through the third mounting hole to abut against the door sill beam, and the second fastener is passed through the fourth mounting hole and the second pad to fix the battery pack on the door sill beam.

12. The vehicle according to claim 10, characterized in that The second gap is 3mm-7mm.

13. The vehicle according to claim 10, characterized in that The compression rate of the second sealing foam is 40%-60%.

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