A battery pack device capable of automatically repairing bottom shell liquid leakage and new energy vehicle

Abstract

The application relates to the technical field of automobile accessories, and provides a battery pack device capable of automatically repairing bottom shell liquid leakage and a new energy automobile, which comprises a battery pack lower cover, the top of the battery pack lower cover is provided with a center cover, the inside of the battery pack lower cover is provided with a built-in separation assembly, the built-in separation assembly is composed of multiple longitudinal partitions and multiple transverse partitions fixedly installed on the longitudinal partitions, a flow cavity is arranged between every two adjacent longitudinal partitions and every two adjacent transverse partitions, flow holes are arranged on the cavity walls of the flow cavities, the longitudinal partitions and the transverse partitions are fixedly installed on the inner walls of the battery pack lower cover, multiple repairing assemblies are arranged on the center cover, the repairing assembly comprises an electric push rod fixedly installed on the top surface of the center cover, a cavity blocking plate located in the flow cavity and in sliding connection with the flow cavity is arranged on the telescopic shaft of the electric push rod. The application has the functions of liquid leakage repairing, high safety and convenient use.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and more specifically, to a battery pack device and a new energy vehicle that can automatically repair leakage in the bottom shell. Background Technology

[0002] A battery pack mainly consists of battery cells, a battery management system, a thermal management system, an electrical system, and structural components. With the rapid popularization of new energy vehicles, the performance and safety of the battery pack, as a core component of new energy vehicles, are crucial to the overall performance and safety of the vehicle. In addition, with the continuous advancement of battery technology, the energy density of battery packs is gradually increasing, and the charging speed is also accelerating, which provides better technical support for the development of new energy vehicles.

[0003] The invention patent with authorization announcement number CN114614154B discloses a battery pack, including a first cooling component, an outer frame, a battery pack, a second cooling component, a top cover, and a fan. The first cooling component includes a first liquid cooling plate; one end of the outer frame is connected to the first liquid cooling plate, and the outer frame and the first liquid cooling plate define a receiving cavity; the battery pack is housed in the receiving cavity; the second cooling component is housed in the receiving cavity and includes a second liquid cooling plate; the top cover is connected to the end of the outer frame away from the first liquid cooling plate to close the receiving cavity; the fan is housed in the receiving cavity, and there is a wind-cooling cavity between the second liquid cooling plate and the top cover. The fan is used to blow air into the wind-cooling cavity, which can accelerate the air flow speed, so that the air carries away the heat of the second liquid cooling plate, assists the second liquid cooling plate in heat dissipation, and prevents external heat from being transferred to the battery, thereby improving heat dissipation efficiency and thus improving the service life and safety of the battery pack.

[0004] Patent CN114361675B discloses a battery pack comprising a battery assembly and a tray. The battery assembly includes at least one battery cell, and each battery cell includes multiple individual cells. The length direction of each individual cell is a first direction, and the multiple individual cells are arranged along a second direction. The tray includes at least one temperature regulating unit, which includes a base plate and temperature regulating channels and a confluence channel formed on the base plate. The temperature regulating channels are vertically opposite to the battery cells to exchange heat with the individual cells, while the confluence channels are vertically offset from the battery cells to avoid heat exchange with the individual cells. Both the temperature regulating channels and the confluence channels extend along the first direction and are arranged along the second direction. Each temperature regulating channel exchanges heat with at least one individual cell arranged along the second direction and with at most one individual cell arranged along the first direction. The battery pack of this invention has good cooling consistency and a small structural volume.

[0005] While the aforementioned technical solutions have certain advantages, the battery pack contains a coolant chamber with coolant inlet and outlet pipes. If the bottom of the battery pack is damaged in a collision, the lack of internal repair mechanisms allows coolant to leak out directly through the damaged area, rendering the cooling system unusable and ultimately rendering the entire battery pack unusable, resulting in economic losses and inconvenience to users. Therefore, we propose a battery pack device and a new energy vehicle that can automatically repair bottom leakage. Summary of the Invention

[0006] The purpose of this application is to provide a battery pack device and a new energy vehicle that can automatically repair leakage in the bottom shell, so as to solve the technical problem that the battery pack in the prior art lacks a repair component, and once a collision occurs, the coolant will flow out directly, which will further lead to the scrapping of the entire battery pack.

[0007] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0008] On one hand, this application provides a battery pack device capable of automatically repairing bottom leakage, including a battery pack bottom cover, a central seal on the top of the bottom cover, and an internal partition assembly inside the bottom cover. The internal partition assembly consists of multiple longitudinal partitions arranged linearly at equal intervals and multiple transverse partitions fixedly installed linearly at equal intervals on the longitudinal partitions. A flow cavity is provided between two adjacent longitudinal partitions and two adjacent transverse partitions. A flow hole is provided on the cavity wall of the flow cavity. The longitudinal partitions and the transverse partitions are fixedly installed on the inner wall of the bottom cover. The flow hole is used for coolant flow. The central seal is provided with multiple repair components for sealing the bottom plate of the bottom cover after damage. The repair components include an electric push rod fixedly installed on the top surface of the central seal. A cavity sealing plate located in the flow cavity and slidably connected to the flow cavity is provided on the telescopic shaft of the electric push rod.

[0009] In one embodiment, a plurality of longitudinal partitions and a plurality of transverse partitions together form a grid-like plate, which is used to divide the space inside the battery pack lower cover into a plurality of flow cavities.

[0010] In one embodiment, the thickness of the cavity sealing plate is less than the height of the flow hole, so that the coolant can flow normally along the flow hole.

[0011] In one embodiment, a coolant inlet pipe communicating with the interior of the battery pack lower cover is fixedly installed on one side plate of the battery pack lower cover, and a coolant outlet pipe communicating with the interior of the battery pack lower cover is fixedly installed on the other side plate of the battery pack lower cover. The coolant inlet pipe and the coolant outlet pipe are used for coolant inlet and outlet operations, respectively.

[0012] In one embodiment, a plurality of fixed protrusions arranged in a matrix are fixedly installed on the bottom surface of the battery pack lower cover. A battery pack protective plate is provided below the battery pack lower cover. The battery pack protective plate is fixedly installed on the bottom surface of the fixed protrusions by a plurality of fastening screws. The fixed protrusions are used to provide pressure-resistant support for the battery pack protective plate. The height of the fixed protrusions is 2cm to 4cm, which facilitates the use of the battery pack protective plate to provide further anti-collision protection for the bottom of the battery pack lower cover.

[0013] In one embodiment, a plurality of springs arranged in a matrix are fixedly mounted on the upper surface of the battery pack cover, the top ends of the springs abutting the bottom surface of the lower cover of the battery pack, and the springs are used for buffering and protection operation.

[0014] In one embodiment, a battery pack cover is fixedly mounted on the top surface of the central cover, and the battery pack cover is used to install battery pack accessories.

[0015] In one embodiment, a rectangular plate is fixedly installed at the end of the telescopic shaft of the electric push rod, and the cavity sealing plate is fixedly installed on the bottom surface of the rectangular plate. Sealing gaskets are fixedly installed on all four sides of the cavity sealing plate. The sealing gaskets abut against the cavity wall of the flow cavity. The sealing gaskets are used for sealing operations to improve the sealing effect and make it less likely for leakage to occur.

[0016] In one embodiment, two symmetrical guide rods are fixedly installed on the upper surface of the rectangular plate. A limiting plate is fixedly installed at the top of the guide rods. A corresponding number of guide sleeves are fixedly installed on the top wall of the central cover. A rectangular hole is provided in the guide sleeve along the height direction of the guide sleeve and connected to the outside. The guide rods and the limiting plate are both located in the rectangular hole and are slidably connected to the rectangular hole. A rectangular baffle is fixedly installed on the hole wall at the bottom position of the rectangular hole. The limiting plate slides down to abut against the upper surface of the rectangular baffle to limit the extension distance of the telescopic shaft of the electric push rod.

[0017] On the other hand, this application also provides a new energy vehicle, including the above-mentioned battery pack device that can automatically repair leakage in the bottom shell, and a connecting component for installing and connecting the battery pack device that can automatically repair leakage in the bottom shell.

[0018] The beneficial effects of the battery pack device for automatic bottom leakage repair provided in this application and the new energy vehicle are at least as follows:

[0019] 1. By using the built-in partition component, the space inside the battery pack bottom cover is divided into multiple small spaces. When a single small space is damaged, the electric push rod in the repair component works to drive the cavity sealing plate and sealing gasket downwards, thereby sealing the damaged part on the bottom plate of the battery pack bottom cover. After sealing, leakage can be reduced, achieving a repair effect and preventing the entire battery pack from being scrapped due to local damage to the battery pack bottom cover.

[0020] 2. The battery pack guard plate provides further impact protection for the bottom of the battery pack cover, and the spring provides collision buffer protection for the battery pack guard plate area, making it convenient to use.

[0021] 3. The guide rod and guide sleeve can guide the movement of the cavity sealing plate, making the cavity sealing plate more stable when moving. In addition, the rectangular baffle and limit plate can limit the downward movement distance of the cavity sealing plate. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the exploded structure provided in an embodiment of this application;

[0025] Figure 3 This is one of the structural schematic diagrams provided in the embodiments of this application;

[0026] Figure 4 This is the second partial structural schematic diagram provided for the embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the battery pack lower cover and the built-in partition assembly provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the built-in spacer component provided in an embodiment of this application;

[0029] Figure 7A schematic diagram of the structure of the center cap and remedial assembly provided in the embodiments of this application;

[0030] Figure 8 A schematic diagram of the structure of the remedial component provided in the embodiments of this application;

[0031] Figure 9 This is the third partial structural schematic diagram provided for the embodiments of this application;

[0032] Figure 10 This is a cross-sectional view of the guide sleeve and rectangular baffle provided in an embodiment of this application.

[0033] The following are the labeling elements in the figure:

[0034] 1. Battery pack bottom cover; 10. Coolant inlet pipe; 11. Coolant outlet pipe; 12. Fixing protrusion;

[0035] 2. Built-in partition assembly; 20. Longitudinal partition; 21. Transverse partition; 22. Flow cavity; 23. Flow hole;

[0036] 3. Center cap;

[0037] 4. Remedial components; 40. Electric push rod; 41. Rectangular plate; 42. Cavity sealing plate; 43. Sealing gasket; 44. Guide rod; 441. Limiting plate; 45. Guide sleeve; 451. Rectangular hole; 452. Rectangular baffle;

[0038] 5. Battery pack protective plate; 50. Spring;

[0039] 6. Battery pack cover. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0041] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0042] Example 1

[0043] Please see Figures 1-10 As shown, this embodiment provides a battery pack device that can automatically repair leakage in the bottom shell, including a battery pack lower cover 1. A central cover 3 is provided on the top of the battery pack lower cover 1. An internal partition component 2 is provided inside the battery pack lower cover 1. The internal partition component 2 consists of multiple longitudinal partitions 20 arranged linearly at equal intervals and multiple transverse partitions 21 fixedly installed on the longitudinal partitions 20 linearly at equal intervals. A flow cavity 22 is provided between two adjacent longitudinal partitions 20 and two adjacent transverse partitions 21. A flow hole 23 is provided on the cavity wall of the flow cavity 22. The longitudinal partitions 20 and the transverse partitions 21 are fixedly installed on the inner wall of the battery pack lower cover 1. The flow hole 23 is used for the flow of coolant. The multiple longitudinal partitions 20 and the multiple transverse partitions 21 together form a grid-like plate, which is used to divide the space inside the battery pack lower cover 1 into multiple flow cavities 22.

[0044] Specifically, the center cover 3 is provided with multiple remedial components 4 for sealing the bottom plate of the battery pack lower cover 1 after it is damaged. The remedial components 4 include an electric push rod 40 fixedly installed on the top surface of the center cover 3. The telescopic shaft of the electric push rod 40 is provided with a cavity sealing plate 42 located in the flow cavity 22 and slidably connected to the flow cavity 22. When the bottom plate of the battery pack lower cover 1 is damaged by an impact, the cavity sealing plate 42 moves downward and presses against the damaged part, which can seal the damaged part and reduce the leakage of coolant.

[0045] In this embodiment, the thickness of the cavity sealing plate 42 is less than the height of the flow hole 23, so that the coolant can flow normally along the flow hole 23.

[0046] Specifically, a rectangular plate 41 is fixedly installed at the end of the telescopic shaft of the electric push rod 40, and a cavity sealing plate 42 is fixedly installed on the bottom surface of the rectangular plate 41, which facilitates the fixed installation operation of the cavity sealing plate 42; a sealing gasket 43 is fixedly installed on each of the four sides of the cavity sealing plate 42, and the sealing gasket 43 abuts against the cavity wall of the flow cavity 22. The sealing gasket 43 is used for sealing operation to improve the sealing effect and make it less likely to leak.

[0047] Specifically, a coolant inlet pipe 10 connected to the interior of the battery pack lower cover 1 is fixedly installed on one side plate of the battery pack lower cover 1, and a coolant outlet pipe 11 connected to the interior of the battery pack lower cover 1 is fixedly installed on the other side plate of the battery pack lower cover 1. The coolant inlet pipe 10 and the coolant outlet pipe 11 are used for the inlet and outlet operations of coolant, respectively.

[0048] Example 2

[0049] Please see Figures 1-10 As shown, this embodiment provides a battery pack device that can automatically repair leakage in the bottom shell, including a battery pack lower cover 1. A central cover 3 is provided on the top of the battery pack lower cover 1. An internal partition component 2 is provided inside the battery pack lower cover 1. The internal partition component 2 consists of multiple longitudinal partitions 20 arranged linearly at equal intervals and multiple transverse partitions 21 fixedly installed on the longitudinal partitions 20 linearly at equal intervals. A flow cavity 22 is provided between two adjacent longitudinal partitions 20 and two adjacent transverse partitions 21. A flow hole 23 is provided on the cavity wall of the flow cavity 22. The longitudinal partitions 20 and the transverse partitions 21 are fixedly installed on the inner wall of the battery pack lower cover 1. The flow hole 23 is used for the flow of coolant. The multiple longitudinal partitions 20 and the multiple transverse partitions 21 together form a grid-like plate, which is used to divide the space inside the battery pack lower cover 1 into multiple flow cavities 22.

[0050] Specifically, the center cover 3 is provided with multiple remedial components 4 for sealing the bottom plate of the battery pack lower cover 1 after it is damaged. The remedial components 4 include an electric push rod 40 fixedly installed on the top surface of the center cover 3. The telescopic shaft of the electric push rod 40 is provided with a cavity sealing plate 42 located in the flow cavity 22 and slidably connected to the flow cavity 22. When the bottom plate of the battery pack lower cover 1 is damaged by an impact, the cavity sealing plate 42 moves downward and presses against the damaged part, which can seal the damaged part and reduce the leakage of coolant.

[0051] In this embodiment, the thickness of the cavity sealing plate 42 is less than the height of the flow hole 23, so that the coolant can flow normally along the flow hole 23.

[0052] Specifically, a rectangular plate 41 is fixedly installed at the end of the telescopic shaft of the electric push rod 40, and a cavity sealing plate 42 is fixedly installed on the bottom surface of the rectangular plate 41, which facilitates the fixed installation operation of the cavity sealing plate 42; a sealing gasket 43 is fixedly installed on each of the four sides of the cavity sealing plate 42, and the sealing gasket 43 abuts against the cavity wall of the flow cavity 22. The sealing gasket 43 is used for sealing operation to improve the sealing effect and make it less likely to leak.

[0053] Specifically, a coolant inlet pipe 10 connected to the interior of the battery pack lower cover 1 is fixedly installed on one side plate of the battery pack lower cover 1, and a coolant outlet pipe 11 connected to the interior of the battery pack lower cover 1 is fixedly installed on the other side plate of the battery pack lower cover 1. The coolant inlet pipe 10 and the coolant outlet pipe 11 are used for the inlet and outlet operations of coolant, respectively.

[0054] Furthermore, multiple fixed protrusions 12 arranged in a matrix are fixedly installed on the bottom surface of the battery pack lower cover 1. A battery pack protective plate 5 is provided below the battery pack lower cover 1. The battery pack protective plate 5 is fixedly installed on the bottom surface of the fixed protrusions 12 by multiple fastening screws. The fixed protrusions 12 are used to provide pressure-resistant support for the battery pack protective plate 5. The height of the fixed protrusions 12 is 2cm to 4cm, which facilitates the use of the battery pack protective plate 5 to provide further anti-collision protection for the bottom of the battery pack lower cover 1, so that the battery pack lower cover 1 will not be directly damaged by collision.

[0055] Example 3

[0056] Please see Figures 1-10 As shown, this embodiment provides a battery pack device that can automatically repair leakage in the bottom shell, including a battery pack lower cover 1. A central cover 3 is provided on the top of the battery pack lower cover 1. An internal partition component 2 is provided inside the battery pack lower cover 1. The internal partition component 2 consists of multiple longitudinal partitions 20 arranged linearly at equal intervals and multiple transverse partitions 21 fixedly installed on the longitudinal partitions 20 linearly at equal intervals. A flow cavity 22 is provided between two adjacent longitudinal partitions 20 and two adjacent transverse partitions 21. A flow hole 23 is provided on the cavity wall of the flow cavity 22. The longitudinal partitions 20 and the transverse partitions 21 are fixedly installed on the inner wall of the battery pack lower cover 1. The flow hole 23 is used for the flow of coolant. The multiple longitudinal partitions 20 and the multiple transverse partitions 21 together form a grid-like plate, which is used to divide the space inside the battery pack lower cover 1 into multiple flow cavities 22.

[0057] Specifically, the center cover 3 is provided with multiple remedial components 4 for sealing the bottom plate of the battery pack lower cover 1 after it is damaged. The remedial components 4 include an electric push rod 40 fixedly installed on the top surface of the center cover 3. The telescopic shaft of the electric push rod 40 is provided with a cavity sealing plate 42 located in the flow cavity 22 and slidably connected to the flow cavity 22. When the bottom plate of the battery pack lower cover 1 is damaged by an impact, the cavity sealing plate 42 moves downward and presses against the damaged part, which can seal the damaged part and reduce the leakage of coolant.

[0058] In this embodiment, the thickness of the cavity sealing plate 42 is less than the height of the flow hole 23, so that the coolant can flow normally along the flow hole 23.

[0059] Specifically, a rectangular plate 41 is fixedly installed at the end of the telescopic shaft of the electric push rod 40, and a cavity sealing plate 42 is fixedly installed on the bottom surface of the rectangular plate 41, which facilitates the fixed installation operation of the cavity sealing plate 42; a sealing gasket 43 is fixedly installed on each of the four sides of the cavity sealing plate 42, and the sealing gasket 43 abuts against the cavity wall of the flow cavity 22. The sealing gasket 43 is used for sealing operation to improve the sealing effect and make it less likely to leak.

[0060] Specifically, a coolant inlet pipe 10 connected to the interior of the battery pack lower cover 1 is fixedly installed on one side plate of the battery pack lower cover 1, and a coolant outlet pipe 11 connected to the interior of the battery pack lower cover 1 is fixedly installed on the other side plate of the battery pack lower cover 1. The coolant inlet pipe 10 and the coolant outlet pipe 11 are used for the inlet and outlet operations of coolant, respectively.

[0061] Furthermore, multiple fixed protrusions 12 arranged in a matrix are fixedly installed on the bottom surface of the battery pack lower cover 1. A battery pack protective plate 5 is provided below the battery pack lower cover 1. The battery pack protective plate 5 is fixedly installed on the bottom surface of the fixed protrusions 12 by multiple fastening screws. The fixed protrusions 12 are used to provide pressure-resistant support for the battery pack protective plate 5. The height of the fixed protrusions 12 is 2cm to 4cm, which facilitates the use of the battery pack protective plate 5 to provide further anti-collision protection for the bottom of the battery pack lower cover 1, so that the battery pack lower cover 1 will not be directly damaged by collision.

[0062] In addition, multiple springs 50 arranged in a matrix are fixedly installed on the upper surface of the battery pack cover 5. The top of the springs 50 rests against the bottom surface of the battery pack cover 1. The springs 50 are used for buffer protection. When the battery pack cover 5 is damaged by an external force, the springs 50 can play a buffer protection role when the external object continues to hit the springs 50.

[0063] It is worth noting that the distance between two adjacent springs 50 is between 3cm and 8cm, ensuring that the multiple springs 50 are close to each other and can play a good buffering and protection role after being hit.

[0064] Example 4

[0065] Please see Figures 1-10 As shown, this embodiment provides a battery pack device that can automatically repair leakage in the bottom shell, including a battery pack lower cover 1. A central cover 3 is provided on the top of the battery pack lower cover 1. An internal partition component 2 is provided inside the battery pack lower cover 1. The internal partition component 2 consists of multiple longitudinal partitions 20 arranged linearly at equal intervals and multiple transverse partitions 21 fixedly installed on the longitudinal partitions 20 linearly at equal intervals. A flow cavity 22 is provided between two adjacent longitudinal partitions 20 and two adjacent transverse partitions 21. A flow hole 23 is provided on the cavity wall of the flow cavity 22. The longitudinal partitions 20 and the transverse partitions 21 are fixedly installed on the inner wall of the battery pack lower cover 1. The flow hole 23 is used for the flow of coolant. The multiple longitudinal partitions 20 and the multiple transverse partitions 21 together form a grid-like plate, which is used to divide the space inside the battery pack lower cover 1 into multiple flow cavities 22.

[0066] Specifically, the center cover 3 is provided with multiple remedial components 4 for sealing the bottom plate of the battery pack lower cover 1 after it is damaged. The remedial components 4 include an electric push rod 40 fixedly installed on the top surface of the center cover 3. The telescopic shaft of the electric push rod 40 is provided with a cavity sealing plate 42 located in the flow cavity 22 and slidably connected to the flow cavity 22. When the bottom plate of the battery pack lower cover 1 is damaged by an impact, the cavity sealing plate 42 moves downward and presses against the damaged part, which can seal the damaged part and reduce the leakage of coolant.

[0067] In this embodiment, the thickness of the cavity sealing plate 42 is less than the height of the flow hole 23, so that the coolant can flow normally along the flow hole 23.

[0068] Specifically, a rectangular plate 41 is fixedly installed at the end of the telescopic shaft of the electric push rod 40, and a cavity sealing plate 42 is fixedly installed on the bottom surface of the rectangular plate 41, which facilitates the fixed installation operation of the cavity sealing plate 42; a sealing gasket 43 is fixedly installed on each of the four sides of the cavity sealing plate 42, and the sealing gasket 43 abuts against the cavity wall of the flow cavity 22. The sealing gasket 43 is used for sealing operation to improve the sealing effect and make it less likely to leak.

[0069] Specifically, a coolant inlet pipe 10 connected to the interior of the battery pack lower cover 1 is fixedly installed on one side plate of the battery pack lower cover 1, and a coolant outlet pipe 11 connected to the interior of the battery pack lower cover 1 is fixedly installed on the other side plate of the battery pack lower cover 1. The coolant inlet pipe 10 and the coolant outlet pipe 11 are used for the inlet and outlet operations of coolant, respectively.

[0070] Furthermore, multiple fixed protrusions 12 arranged in a matrix are fixedly installed on the bottom surface of the battery pack lower cover 1. A battery pack protective plate 5 is provided below the battery pack lower cover 1. The battery pack protective plate 5 is fixedly installed on the bottom surface of the fixed protrusions 12 by multiple fastening screws. The fixed protrusions 12 are used to provide pressure-resistant support for the battery pack protective plate 5. The height of the fixed protrusions 12 is 2cm to 4cm, which facilitates the use of the battery pack protective plate 5 to provide further anti-collision protection for the bottom of the battery pack lower cover 1, so that the battery pack lower cover 1 will not be directly damaged by collision.

[0071] In addition, multiple springs 50 arranged in a matrix are fixedly installed on the upper surface of the battery pack cover 5. The top of the springs 50 rests against the bottom surface of the battery pack cover 1. The springs 50 are used for buffer protection. When the battery pack cover 5 is damaged by an external force, the springs 50 can play a buffer protection role when the external object continues to hit the springs 50.

[0072] It is worth noting that the distance between two adjacent springs 50 is between 3cm and 8cm, ensuring that the multiple springs 50 are close to each other and can play a good buffering and protection role after being hit.

[0073] In this embodiment, a battery pack cover 6 is fixedly installed on the top surface of the center cover 3. The battery pack cover 6 is used to install battery pack accessories, so that the battery pack accessories can be assembled normally.

[0074] Example 5

[0075] Please see Figures 1-10 As shown, this embodiment provides a battery pack device that can automatically repair leakage in the bottom shell, including a battery pack lower cover 1. A central cover 3 is provided on the top of the battery pack lower cover 1. An internal partition component 2 is provided inside the battery pack lower cover 1. The internal partition component 2 consists of multiple longitudinal partitions 20 arranged linearly at equal intervals and multiple transverse partitions 21 fixedly installed on the longitudinal partitions 20 linearly at equal intervals. A flow cavity 22 is provided between two adjacent longitudinal partitions 20 and two adjacent transverse partitions 21. A flow hole 23 is provided on the cavity wall of the flow cavity 22. The longitudinal partitions 20 and the transverse partitions 21 are fixedly installed on the inner wall of the battery pack lower cover 1. The flow hole 23 is used for the flow of coolant. The multiple longitudinal partitions 20 and the multiple transverse partitions 21 together form a grid-like plate, which is used to divide the space inside the battery pack lower cover 1 into multiple flow cavities 22.

[0076] Specifically, the center cover 3 is provided with multiple remedial components 4 for sealing the bottom plate of the battery pack lower cover 1 after it is damaged. The remedial components 4 include an electric push rod 40 fixedly installed on the top surface of the center cover 3. The telescopic shaft of the electric push rod 40 is provided with a cavity sealing plate 42 located in the flow cavity 22 and slidably connected to the flow cavity 22. When the bottom plate of the battery pack lower cover 1 is damaged by an impact, the cavity sealing plate 42 moves downward and presses against the damaged part, which can seal the damaged part and reduce the leakage of coolant.

[0077] In this embodiment, the thickness of the cavity sealing plate 42 is less than the height of the flow hole 23, so that the coolant can flow normally along the flow hole 23.

[0078] Specifically, a rectangular plate 41 is fixedly installed at the end of the telescopic shaft of the electric push rod 40, and a cavity sealing plate 42 is fixedly installed on the bottom surface of the rectangular plate 41, which facilitates the fixed installation operation of the cavity sealing plate 42; a sealing gasket 43 is fixedly installed on each of the four sides of the cavity sealing plate 42, and the sealing gasket 43 abuts against the cavity wall of the flow cavity 22. The sealing gasket 43 is used for sealing operation to improve the sealing effect and make it less likely to leak.

[0079] Specifically, a coolant inlet pipe 10 connected to the interior of the battery pack lower cover 1 is fixedly installed on one side plate of the battery pack lower cover 1, and a coolant outlet pipe 11 connected to the interior of the battery pack lower cover 1 is fixedly installed on the other side plate of the battery pack lower cover 1. The coolant inlet pipe 10 and the coolant outlet pipe 11 are used for the inlet and outlet operations of coolant, respectively.

[0080] Furthermore, multiple fixed protrusions 12 arranged in a matrix are fixedly installed on the bottom surface of the battery pack lower cover 1. A battery pack protective plate 5 is provided below the battery pack lower cover 1. The battery pack protective plate 5 is fixedly installed on the bottom surface of the fixed protrusions 12 by multiple fastening screws. The fixed protrusions 12 are used to provide pressure-resistant support for the battery pack protective plate 5. The height of the fixed protrusions 12 is 2cm to 4cm, which facilitates the use of the battery pack protective plate 5 to provide further anti-collision protection for the bottom of the battery pack lower cover 1, so that the battery pack lower cover 1 will not be directly damaged by collision.

[0081] In addition, multiple springs 50 arranged in a matrix are fixedly installed on the upper surface of the battery pack cover 5. The top of the springs 50 rests against the bottom surface of the battery pack cover 1. The springs 50 are used for buffer protection. When the battery pack cover 5 is damaged by an external force, the springs 50 can play a buffer protection role when the external object continues to hit the springs 50.

[0082] It is worth noting that the distance between two adjacent springs 50 is between 3cm and 8cm, ensuring that the multiple springs 50 are close to each other and can play a good buffering and protection role after being hit.

[0083] In this embodiment, a battery pack cover 6 is fixedly installed on the top surface of the center cover 3. The battery pack cover 6 is used to install battery pack accessories, so that the battery pack accessories can be assembled normally.

[0084] It is worth noting that two symmetrical guide rods 44 are fixedly installed on the upper surface of the rectangular plate 41. A limiting plate 441 is fixedly installed at the top of the guide rods 44. A corresponding number of guide sleeves 45 are fixedly installed on the top wall of the central cover 3. A rectangular hole 451 is provided in the guide sleeve 45 along the height direction of the guide sleeve 45 and connected to the outside. The guide rods 44 and the limiting plate 441 are both located in the rectangular hole 451 and are slidably connected to the rectangular hole 451. A rectangular baffle 452 is fixedly installed on the hole wall at the bottom position of the rectangular hole 451. The limiting plate 441 slides down to abut against the upper surface of the rectangular baffle 452 to limit the extension distance of the telescopic shaft of the electric push rod 40.

[0085] This application also provides a new energy vehicle, including the above-mentioned battery pack device that enables automatic repair of bottom casing leakage, and a connecting component for mounting and connecting the battery pack device that enables automatic repair of bottom casing leakage.

[0086] When the battery pack device of this application, which enables automatic repair of bottom shell leakage, is used in a new energy vehicle, the entire device is correctly installed on the vehicle, and the battery pack guard plate 5 is fixed to the bottom surface of multiple fixed protrusions 12 using multiple fastening screws. When the battery pack guard plate 5 collides with an external object, if the bottom plate of the battery pack lower cover 1 is not damaged, the electric push rod 40 does not move, and the cavity sealing plate 42 is still at the top position in the flow cavity 22. When the corresponding part of the bottom plate of the battery pack lower cover 1 is damaged due to the collision and coolant leakage occurs, the electric push rod 40 at the corresponding position is activated and made to work. When the electric push rod 40 works, its telescopic shaft extends and drives the cavity sealing plate 42 to move downward to seal the damaged part. At this time, part of the flow hole 23 is still exposed, ensuring that the coolant can continue to flow normally, thus completing the repair operation.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery pack device capable of automatically repairing bottom casing leakage, characterized in that, The battery pack includes a lower cover (1), with a central cover (3) at the top. An internal partition assembly (2) is provided inside the lower cover (1). The internal partition assembly (2) consists of multiple longitudinal partitions (20) arranged linearly at equal intervals and multiple transverse partitions (21) fixedly installed linearly at equal intervals on the longitudinal partitions (20). A flow cavity (22) is provided between each pair of adjacent longitudinal partitions (20) and each pair of adjacent transverse partitions (21). Flow holes (23) are provided on the walls of the flow cavities (22). The longitudinal partitions (20) and the transverse partitions (21) are fixedly installed on the inner walls of the lower cover (1). The flow holes (23) are used for the flow of coolant. Multiple partitions are provided on the central cover (3) for the bottom of the lower cover (1). A remedial assembly (4) for sealing after plate damage, the remedial assembly (4) includes an electric push rod (40) fixedly installed on the top surface of the central cover (3), a cavity sealing plate (42) located in the flow cavity (22) and slidably connected to the flow cavity (22) is provided on the telescopic shaft of the electric push rod (40), the thickness of the cavity sealing plate (42) is less than the height of the flow hole (23), and is used for the coolant to flow normally along the flow hole (23); a rectangular plate (41) is fixedly installed at the end of the telescopic shaft of the electric push rod (40), the cavity sealing plate (42) is fixedly installed on the bottom surface of the rectangular plate (41), and sealing gaskets (43) are fixedly installed on the four sides of the cavity sealing plate (42), the sealing gaskets (43) abut against the cavity wall of the flow cavity (22), and the sealing gaskets (43) are used for sealing operation; Two symmetrical guide rods (44) are fixedly installed on the upper surface of the rectangular plate (41). A limiting plate (441) is fixedly installed at the top of the guide rod (44). A corresponding number of guide sleeves (45) are fixedly installed on the top wall of the central cover (3). A rectangular hole (451) is provided in the guide sleeve (45) along the height direction of the guide sleeve (45) and connected to the outside. The guide rod (44) and the limiting plate (441) are both located in the rectangular hole (451) and are slidably connected to the rectangular hole (451). A rectangular baffle (452) is fixedly installed on the hole wall at the bottom position of the rectangular hole (451). The limiting plate (441) slides down to abut against the upper surface of the rectangular baffle (452) to limit the extension distance of the telescopic shaft of the electric push rod (40).

2. The battery pack device for automatic bottom casing leakage repair according to claim 1, characterized in that, The multiple longitudinal partitions (20) and the multiple transverse partitions (21) together form a grid-like plate body, which is used to divide the space inside the battery pack lower cover (1) into multiple flow cavities (22).

3. The battery pack device for automatic bottom casing leakage repair according to claim 1, characterized in that, A coolant inlet pipe (10) communicating with the inside of the battery pack lower cover (1) is fixedly installed on one side plate, and a coolant outlet pipe (11) communicating with the inside of the battery pack lower cover (1) is fixedly installed on the other side plate. The coolant inlet pipe (10) and the coolant outlet pipe (11) are used for the inlet and outlet operations of coolant, respectively.

4. The battery pack device for automatic bottom casing leakage repair according to claim 1, characterized in that, Multiple fixed protrusions (12) arranged in a matrix are fixedly installed on the bottom surface of the battery pack lower cover (1). A battery pack guard plate (5) is provided below the battery pack lower cover (1). The battery pack guard plate (5) is fixedly installed on the bottom surface of the fixed protrusions (12) by multiple fastening screws. The fixed protrusions (12) are used to provide pressure support for the battery pack guard plate (5). The height of the fixed protrusions (12) is 2cm to 4cm.

5. The battery pack device for automatic bottom casing leakage repair according to claim 4, characterized in that, Multiple springs (50) arranged in a matrix are fixedly installed on the upper surface of the battery pack cover (5). The top of the springs (50) abuts against the bottom surface of the lower cover (1) of the battery pack. The springs (50) are used for buffer protection operation.

6. The battery pack device for automatic bottom casing leakage repair according to claim 1, characterized in that, A battery pack cover (6) is fixedly installed on the top surface of the central cover (3), and the battery pack cover (6) is used to install battery pack accessories.

7. A new energy vehicle, characterized in that: The battery pack device comprising the automatic bottom cover leakage repair as described in any one of claims 1-6, and a connecting assembly for mounting and connecting the battery pack device comprising the automatic bottom cover leakage repair as described in claims 1-6.

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