Battery pack shell convenient to maintain and electric automobile with battery pack shell

Abstract

The utility model discloses a battery pack shell convenient to maintain and an electric automobile with the same, and relates to the technical field of batteries. Comprising a shell body and a sealing assembly, an opening is formed in the shell body, the sealing assembly is detachably arranged at the opening of the shell body, the sealing assembly comprises a mounting part, a groove is formed in the mounting part, a through groove with the size smaller than that of the groove is formed in the bottom of the groove, and the sealing assembly is detachably arranged in the through groove. A groove is formed in the mounting part, a detachable first cover plate is arranged in the groove, the first cover plate covers the through groove and is in sealing connection with the mounting part around the through groove, a detachable second cover plate covers the groove, and the second cover plate covers the groove and is in sealing connection with the mounting part around the groove. The battery pack shell convenient to maintain provided by the utility model can be flexibly arranged on the shell, can be used after being provided with an opening, and has better sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack housing convenient for maintenance and an electric vehicle having the same. Background Art

[0002] Modern devices, especially those that need to operate in complex or harsh environments, increasingly tend to be protected by enclosures. This design not only provides necessary sealing protection to prevent damage to sensitive components from mechanical shock and external water or dust, but also optimizes space utilization through an integrated approach, improving overall reliability and maintenance convenience.

[0003] Protecting these devices by enclosures can play a role. These devices often also face the need for damage repair or regular maintenance. For this reason, these enclosures are configured to be disassembled on one or more sides to repair or maintain the devices inside the enclosures. However, disassembling the enclosures is troublesome, and frequently disassembling the enclosures is likely to damage the enclosures, making it difficult to ensure their sealing performance, or it is difficult to disassemble and assemble the enclosures under factors such as limited space, and repair or maintenance cannot be carried out. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a battery pack housing convenient for maintenance and an electric vehicle having the same.

[0005] The utility model provides a battery pack housing convenient for maintenance, which is characterized in that: it includes a housing body and a sealing component. An opening is provided on the housing body. The sealing component is detachably arranged at the opening of the housing body, and the sealing component includes an installation part. A groove is provided on the installation part, and a through groove with a size smaller than that of the groove is opened at the bottom of the groove. A detachable first cover plate is arranged in the groove. The first cover plate covers the through groove and is partially and sealingly connected to the installation part around the through groove. A detachable second cover plate is arranged on the groove. The second cover plate covers the groove and is partially and sealingly connected to the installation part around the groove.

[0006] Optionally, a first sealing ring is installed along the periphery of the through groove at the bottom of the groove. The first cover plate is arranged above the first sealing ring and is detachably connected to the bottom of the groove; a second sealing ring is installed along the periphery of the groove on the installation part. The second cover plate is arranged on the second sealing ring and is detachably connected to the installation part.

[0007] Optionally, an installation groove is opened along the periphery of the through groove at the bottom of the groove of the installation part, and the first sealing ring is installed in the installation groove.

[0008] Optionally, the height of the first sealing ring is greater than the depth of the installation groove, and at least a part of the first sealing ring is located outside the installation groove.

[0009] Optionally, a plurality of positioning grooves are provided on one side of the first cover plate, and lugs corresponding to the positioning grooves are provided on the side walls of the grooves.

[0010] Optionally, the first cover plate is fixedly installed at the bottom of the groove by a first screw.

[0011] Optionally, the second sealing ring is a silica gel foam sealing ring, the second cover plate is fixedly installed on the installation part by a second screw, and the second screw passes through the second sealing ring.

[0012] Optionally, a water guide groove is formed in a part of the installation part around the groove, and the water guide groove communicates the groove with the outside of the installation part.

[0013] Optionally, the second cover plate is a steel plate, a fiberglass cloth is laminated on the surface of the second cover plate facing the installation part, and polyurethane is sprayed on the fiberglass cloth.

[0014] The present utility model further provides an electric vehicle, including a battery cell group and the battery pack housing facilitating maintenance as described above, the battery cell group being integrated in the housing body; the housing body includes an upper cover and a lower housing, and the upper cover and the lower housing enclose a receiving space for receiving the battery cell group; the upper cover of the housing body serves as the floor of the passenger compartment of the electric vehicle.

[0015] The battery pack housing facilitating maintenance and the electric vehicle having the same provided by the embodiments of the present utility model can complete the repair and maintenance of the equipment inside the housing without disassembling the entire surface of the housing. Only an opening needs to be opened at a position on the housing corresponding to the equipment inside having repair and maintenance requirements, and the sealing assembly is installed at the opening. The inside of the housing can be repaired and maintained by opening the first cover plate and the second cover plate. Moreover, the first sealing ring and the second sealing ring provided on the installation part can ensure the sealing performance of the sealing assembly, preventing external water or dust from entering the housing through the sealing assembly. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the internal structure of an existing battery pack.

[0018] Figure 2 This is a partial structural schematic diagram of a battery pack housing that is convenient for maintenance according to the present utility model.

[0019] Figure 3 It is Figure 2 a partial enlarged view of location A in

[0020] Figure 4 This is an exploded structural schematic diagram of a housing body and a sealing assembly in a battery pack housing that is convenient for maintenance according to the present utility model.

[0021] Figure 5 This is a structural schematic diagram of an installation part in a battery pack housing that is convenient for maintenance according to the present utility model.

[0022] Figure 6 This is an assembly schematic diagram of an installation part and a first sealing ring in a battery pack housing that is convenient for maintenance according to the present utility model.

[0023] Figure 7 This is an assembly schematic diagram of an installation part, a first cover plate, and a second sealing ring in a battery pack housing that is convenient for maintenance according to the present utility model.

[0024] Figure 8 This is an assembly schematic diagram of an installation part and a second cover plate in a battery pack housing that is convenient for maintenance according to the present utility model.

[0025] In the figure:

[0026] Lower cover 1, battery cell 2, relay 3, housing body 4, sealing assembly 5;

[0027] Installation part 10, groove 11, through groove 12, installation groove 13, screw hole 14, water guide groove 15; Fourth screw 161;

[0028] First sealing ring 20;

[0029] First cover plate 30, first screw 31;

[0030] Second sealing ring 40, third screw 41;

[0031] Second cover plate 50, second screw 51. Specific embodiments

[0032] Next, specific embodiments of the present utility model will be described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0033] Unless otherwise clearly stipulated and defined, terms such as "set", "install", "connect", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is habitually placed during use. It is only for the convenience of description and simplification of the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0035] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0036] The term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not specifically listed.

[0037] In the field of electric vehicles, due to users' anxiety about battery life, automotive companies have proposed that the battery pack act as a protective plate to reduce the weight of the vehicle and achieve the effect of increased battery life. Based on this, it is necessary to make the battery pack into a CTB structure (Cell to Body, integrated battery and body structure), forming an integral structure with the battery cells, the upper cover and the box body, and acting as the cockpit floor of the vehicle. In this way of structure, since the battery acts as the cockpit floor of the vehicle and the cockpit floor is integrated with the vehicle body, it is not convenient to disassemble. Therefore, in this way, the upper cover of the battery pack is in a non-maintainable state. As Figure 1 shown in the figure, electrical components such as battery cells 2 are installed in the battery pack. Among them, some parts such as relays 3 need regular maintenance. However, due to the integral structure of the battery pack with the vehicle, and the upper cover acting as the cockpit floor of the vehicle, if the lower cover 1 is disassembled for maintenance, all the devices in the battery pack need to be taken out, which is too troublesome and there is a risk of damaging the battery cells 2. Moreover, frequently disassembling the lower cover 1 of the battery pack will cause the overall sealing performance of the battery pack to deteriorate, and external water or dust is likely to enter the battery pack and damage electrical components such as the battery cells.

[0038] Therefore, as Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the utility model provides a battery pack housing that is convenient for maintenance. An opening is provided in the part of the battery pack that needs to be maintained (such as the relay 3 part), and the sealing component 5 is installed at the opening of the housing body 4 of the battery pack (in this embodiment, the characteristics of the housing body 4 are only related to the panel where the sealing component 5 is installed, so only one panel where the sealing component 5 is installed is shown for the housing body 4 in the figure). The sealing component 5 is detachably arranged at the opening of the housing body 4. For example, Figure 3 As shown in the figure, the sealing component 5 is installed on the housing body 4 through the third screw 41. The third screw 41 passes through the installation part 10 of the sealing component 5 and is threadedly connected to the housing body 4. When the whole sealing component 5 needs to be disassembled, the sealing component 5 can be disassembled by unscrewing the third screw 41. For example, Figure 2 , Figure 3 and Figure 4 As shown, the sealing component 5 includes an installation part 10. There is a groove 11 on the installation part 10. A through groove 12 with a size smaller than that of the groove 11 is opened at the bottom of the groove 11. A first sealing ring 20 is installed along the periphery of the through groove 12 at the bottom of the groove 11. A first cover plate 30 is covered above the first sealing ring 20, and the first cover plate 30 is detachably connected to the bottom of the groove 11 of the installation part 10. The first cover plate 30 covers the through groove 12 and is hermetically connected to the part of the installation part 10 around the through groove 12. The connection position of the first cover plate 30 and the bottom of the groove 11 is part of the periphery of the through groove 12 at the bottom of the groove 11. A second sealing ring 40 is installed along the periphery of the groove 11 on the installation part 10. A second cover plate 50 is covered on the second sealing ring 40, and the second cover plate 50 is detachably connected to the installation part 10.

[0039] By providing an opening in the part of the housing body 4 of the battery pack that needs to be maintained and installing the sealing component 5 at the opening, when the relay in the battery pack needs to be maintained, the first cover plate 30 and the second cover plate 50 are disassembled to make the through groove 12 of the installation part 10 in an open state to the outside, and then the relay in the battery pack can be maintained through the through groove 12 of the installation part 10. And after the relay maintenance is completed, the first cover plate 30 and the second cover plate 50 are installed, and the first sealing ring 20 and the second sealing ring 40 can also play a protective role to prevent external water or dust from entering the battery pack through the sealing component 5.

[0040] The installation part can be selected as a metal casting, such as an aluminum casting, etc.

[0041] Furthermore, for example, Figure 5 and Figure 6As shown in the figure, an installation groove 13 is formed along the periphery of the through groove 12 at the bottom of the groove 11 of the installation part 10, and the first sealing ring 20 is installed in the installation groove 13. By providing the installation groove 13 at the bottom of the groove 11 of the installation part 10 to install the first sealing ring 20, the first sealing ring 20 can be fixed, preventing the first sealing ring 20 from falling off during the installation and disassembly of the first cover plate 30 or the first sealing ring 20 from being deformed during being touched due to its soft material, which may affect the sealing effect.

[0042] Moreover, the height of the first sealing ring 20 is greater than the depth of the installation groove 13, and at least a part of the first sealing ring 20 is located outside the installation groove 13. When the first cover plate 30 is installed on the first sealing ring 20, when the first cover plate 30 approaches the through groove 12, it first contacts the first sealing ring 20. During the process of the first cover plate 30 further approaching the through groove 12, the first sealing ring 20 is gradually squeezed and finally fixed above the through groove 12. In this way, there will be no gap between the bottom of the groove 11 of the installation part 10, the first sealing ring 20 and the first cover plate 30, improving the sealing effect and achieving an IP68-level sealing structure.

[0043] Meanwhile, the shape of the first cover plate 30 is the same as that of the groove 11. That is, when the first cover plate 30 is installed above and fixed to the first sealing ring 20, the edge of the first cover plate 30 fits against the side wall of the groove 11. In this way, when the first cover plate 30 is installed in the groove 11, the first cover plate 30 can also play a sealing role. If external water or dust enters the groove 11 of the installation part 10, it is first isolated by the first cover plate 30. When the water or dust enters below the first cover plate 30 through the gap between the first cover plate 30 and the side wall of the groove 11, at this time, it is protected by the first sealing ring 20. In this way, the first cover plate 30 can preliminarily isolate water and dust, improving the overall sealing performance of the sealing assembly 5.

[0044] As Figure 5 and Figure 7 shown in the figure, the first cover plate 30 is fixedly installed at the bottom of the groove 11 through the first screw 31, and the part where the first cover plate 30 is connected to the groove 11 is the part of the installation part 10 around the through groove 12. A screw hole 14 is formed at the bottom of the groove 11 of the installation part 10, and the screw hole 14 does not penetrate the installation part 10. After the first sealing ring 20 is installed in the installation groove 13 at the bottom of the groove 11, the first cover plate 30 is placed into the groove 11 and fixed by screwing the first screw 31 through the first cover plate 30 and into the screw hole 14 at the bottom of the groove 11. In this way, the first cover plate 30 can be detachably installed in the groove 11 to meet the maintenance requirements.

[0045] As Figure 8As shown in the figure, the second sealing ring 40 is a silica gel foam sealing ring, that is, the material of the second sealing ring is silica gel foam. The second cover plate 50 is fixedly installed on the installation part 10 through the second screw 51, and the second screw 51 passes through the silica gel foam sealing ring. The use of silica gel foam as the material of the second sealing ring 40 can play a role in isolating external water, and it plays a first layer of waterproofing role outside the first cover plate 30 and the first sealing ring 20. The second cover plate 50 is installed on the installation part 10 through the second screw 51. When disassembly is required, the second screw 51 is unscrewed, and when installation is required, the second screw 51 is screwed on.

[0046] As Figure 7 As shown in the figure, several positioning grooves 32 are provided on one side of the first cover plate 30, and lugs 16 corresponding to the positioning grooves 32 are provided on the side wall of the groove 11. The setting of the positioning grooves 32 and the lugs 16 can not only play a positioning role, but also facilitate the entry of fingers during the process of taking and placing the first cover plate 30, making it more convenient to take and place the first cover plate 30. At the same time, a fourth screw 161 is drilled at the lug 16 extending from the side wall of the groove 11, which can enhance the structural strength of the lug 16.

[0047] As Figure 5 and Figure 6 As shown in the figure, a water guide groove 15 is opened on the installation part 10. The water guide groove 15 communicates the groove 11 with the outside of the installation part 10, and one end of the water guide groove 15 communicating with the groove 11 is located between the first cover plate 30 and the second cover plate 50. Preferably, a water groove is also correspondingly opened at the water guide groove 15 of the installation part 10 for the second sealing ring 40. The setting of the water guide groove 15 can isolate the water by the first cover plate 30 and the first sealing ring 20 when water seeps into the groove 11 of the installation part 10, and the water can be discharged to the outside through the water guide groove 15.

[0048] At the same time, in order to ensure that the battery pack will not affect its hardness after opening the opening, the second cover plate 50 is a steel plate, and a glass fiber cloth is laminated on the surface of the second cover plate 50 facing the installation part 10, and polyurethane is sprayed on the glass fiber cloth. The glass fiber cloth and polyurethane are laminated together by the STM (Spray Transfer Molding) process.

[0049] The present invention also provides an electric vehicle, including a battery cell group and the battery pack housing convenient for maintenance as described above, and the battery cell group is integrated in the housing body 4. The housing body 4 includes an upper cover and a lower shell (the housing body 4 shown in the figure is a panel of the lower shell), the upper cover and the lower shell enclose to form a receiving space for receiving the battery cell group, and the upper cover of the housing body 4 serves as the floor of the passenger compartment of the electric vehicle.

[0050] The above are only the specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A battery pack housing that is convenient for maintenance, characterized in that: It includes a housing body (4) and a sealing assembly (5). An opening is provided on the housing body (4). The sealing assembly (5) is detachably arranged at the opening of the housing body (4). And the sealing assembly (5) includes a mounting portion (10). There is a groove (11) on the mounting portion (10). A through groove (12) with a size smaller than that of the groove (11) is provided at the bottom of the groove (11). A detachable first cover plate (30) is arranged in the groove (11). The first cover plate (30) covers the through groove (12) and is partially and sealingly connected to the mounting portion (10) around the through groove (12). A detachable second cover plate (50) is provided on the groove (11). The second cover plate (50) covers the groove (11) and is partially and sealingly connected to the mounting portion (10) around the groove (11).

2. The battery pack housing facilitating maintenance according to claim 1, wherein: A first sealing ring (20) is mounted along the periphery of the through groove (12) at the bottom of the groove (11). The first cover plate (30) is arranged above the first sealing ring (20) and is detachably connected to the bottom of the groove (11). A second sealing ring (40) is mounted along the periphery of the groove (11) on the mounting portion (10). The second cover plate (50) is arranged on the second sealing ring (40) and is detachably connected to the mounting portion (10).

3. The battery pack housing facilitating maintenance according to claim 2, characterized in that: A mounting groove (13) is provided along the periphery of the through groove (12) at the bottom of the groove (11) of the mounting portion (10). The first sealing ring (20) is mounted in the mounting groove (13).

4. The battery pack housing facilitating maintenance according to claim 3, wherein: The height of the first sealing ring (20) is greater than the depth of the mounting groove (13). At least part of the first sealing ring (20) is located outside the mounting groove (13).

5. The battery pack housing that is easy to maintain as described in claim 1, wherein: Several positioning grooves (32) are provided on one side of the first cover plate (30). Lugs (16) corresponding to the positioning grooves (32) are provided on the side wall of the groove (11).

6. The battery pack housing facilitating maintenance according to claim 1, wherein: The first cover plate (30) is fixedly mounted on the bottom of the groove (11) by a first screw (31).

7. The battery pack housing that is easy to maintain according to claim 1, wherein: The second sealing ring (40) is a silica gel foam sealing ring. The second cover plate (50) is fixedly mounted on the mounting portion (10) by a second screw (51) and the second screw (51) passes through the second sealing ring (40).

8. The battery pack housing facilitating maintenance according to claim 1, characterized in that: A water guide groove (15) is provided on the part of the mounting portion (10) around the groove (11). The water guide groove (15) communicates the groove (11) with the outside of the mounting portion (10).

9. The battery pack housing facilitating maintenance according to claim 1, characterized in that: The second cover plate (50) is a steel plate. A glass fiber cloth is laminated on the surface of the second cover plate (50) facing the mounting portion (10). Polyurethane is sprayed on the glass fiber cloth.

10. An electric vehicle, characterized in that: It includes a battery cell group and a battery pack housing facilitating maintenance as described in any one of claims 1-9. The battery cell group is integrated in the housing body (4). The housing body (4) includes an upper cover and a lower shell. The upper cover and the lower shell enclose to form a receiving space for the battery cell group. The upper cover of the housing body (4) serves as the floor of the passenger compartment of an electric vehicle.

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