Electric all-terrain vehicle and power battery pack thereof

Abstract

The utility model relates to the technical field of all-terrain vehicles, and discloses an electric all-terrain vehicle and a power battery pack thereof, the power battery pack comprises a battery shell and a battery monomer, and the battery monomer is arranged in the battery shell. A mounting hole is formed in the battery shell and is communicated with the inside and the outside of the battery shell. The power battery pack further comprises a water absorption assembly, the water absorption assembly comprises a mounting piece, an extension piece, a moisture absorption piece and a connecting piece, and the connecting piece is configured to enable the mounting piece to be detachably connected with the battery shell so as to enable the mounting piece to block the mounting hole. The extension part is connected with the moisture absorption part and the mounting part, the extension part is configured to at least partially penetrate through the mounting hole and is arranged in the battery shell, so that the moisture absorption part is positioned in the battery shell, and the moisture absorption part is configured to absorb water in the battery shell. When the moisture absorption piece is replaced, the battery shell does not need to be disassembled, the workload is small, and operation is easy and convenient.

Description

Technical Field

[0001] The present application relates to the technical field of all-terrain vehicles, and in particular to an electric all-terrain vehicle and a power battery pack thereof. Background Art

[0002] The electric all-terrain vehicle has a power battery pack for providing power to the power components of the electric vehicle.

[0003] Currently, in environments with large temperature differences, condensation is easily generated inside power battery packs. This condensation can come into contact with components within the power battery pack and cause short circuits. Therefore, in the prior art, a water absorption component is often installed inside the power battery pack to absorb the generated condensation.

[0004] However, when a large amount of condensed water is generated inside the power battery pack, the water absorption component will become saturated and it will be difficult to continue absorbing water. Replacing the water absorption component requires disassembling the power battery pack, which is a lot of work. Utility Model Content

[0005] In view of this, the present application provides an electric all-terrain vehicle and a power battery pack thereof, wherein the power battery pack is convenient for replacing the water absorption component.

[0006] An embodiment of the present application provides a power battery pack, comprising a battery shell and a battery cell, wherein the battery cell is arranged inside the battery shell. The battery shell is provided with a mounting hole, which connects the inside and outside of the battery shell. The power battery pack also includes a water absorption assembly, which includes a mounting piece, an extension piece, a moisture absorbent piece, and a connector. The connector is configured to detachably connect the mounting piece to the battery shell so that the mounting piece blocks the mounting hole. The extension piece connects the moisture absorbent piece and the mounting piece. The extension piece is configured to at least partially pass through the mounting hole and be arranged inside the battery shell so that the moisture absorbent piece is located inside the battery shell. The moisture absorbent piece is configured to absorb water in the battery shell.

[0007] In some embodiments of the present application, the moisture absorbent member is disposed around the peripheral wall of the extension member.

[0008] In some embodiments of the present application, the mounting member is provided with a connecting hole, the connecting member includes a first threaded member and a second threaded member, the second threaded member is fixedly connected to the battery shell; the first threaded member is inserted into the connecting hole, and the first threaded member and the second threaded member are threadedly connected.

[0009] In some embodiments of the present application, the second threaded member is located inside the battery shell, and the battery shell is provided with an insertion hole, which connects the inside of the second threaded member and the outside of the battery shell; the first threaded member passes through the insertion hole.

[0010] In some embodiments of the present application, the second threaded member is sealed at one end away from the insertion hole.

[0011] In some embodiments of the present application, a sealing ring is provided between the mounting member and the battery shell.

[0012] In some embodiments of the present application, the mounting member or the battery shell is provided with a mounting ring groove, and the sealing ring is embedded in the mounting ring groove.

[0013] In some embodiments of the present application, the sealing ring is provided with a plurality of positioning protrusions, and the plurality of positioning protrusions are arranged in sequence along the circumference of the sealing ring, and the inner wall of the mounting ring groove is provided with a plurality of positioning grooves, each positioning groove corresponds to a positioning protrusion, and each positioning protrusion is embedded in the corresponding positioning groove; or, the inner wall of the mounting ring groove is provided with a plurality of positioning protrusions, and the plurality of positioning protrusions are arranged in sequence along the circumference of the mounting ring groove, and the sealing ring is provided with a plurality of positioning grooves, each positioning groove corresponds to a positioning protrusion, and each positioning protrusion is embedded in the corresponding positioning groove.

[0014] In some embodiments of the present application, the battery shell is provided with a vent hole, and the power battery pack further includes an explosion-proof valve, which is connected to the battery shell and configured to seal the vent hole. The minimum distance between the mounting hole and the vent hole is 3 mm to 80 mm.

[0015] An embodiment of the present application further provides an electric all-terrain vehicle comprising a frame, a body panel, a running assembly, a power assembly, and a power battery pack provided by any of the above embodiments. The body panel is at least partially disposed on the frame, the running assembly is at least partially disposed below the frame, the power assembly is transmission-connected to the running assembly, and the power battery pack is used to supply power to the power assembly.

[0016] For the power battery pack provided in the present application, when the water absorption component needs to be replaced, the connecting part can be removed and the mounting part can be removed to remove the moisture-absorbing part. Then, the mounting part replaced with a new moisture-absorbing part or the new mounting part with a new moisture-absorbing part can be installed to the battery shell through the connecting part. There is no need to disassemble the battery shell, the workload is small, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an electric all-terrain vehicle provided in one embodiment of the present application;

[0018] Figure 2 This is a schematic structural diagram of a power battery pack provided in one embodiment of the present application;

[0019] Figure 3 yes Figure 1 Partially exploded diagram of the power battery pack;

[0020] Figure 4 yes Figure 3 Schematic diagram of some structures in ;

[0021] Figure 5 yes Figure 4A schematic diagram of the structure of the mounting member, the extension member and the moisture absorbing member;

[0022] Figure 6 yes Figure 5 Schematic diagram of the decomposition of the middle part structure;

[0023] Figure 7 yes Figure 4 Enlarged view of part A. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0026] The following embodiments of the present application are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0027] Reference Figure 1 and Figure 2 The embodiment of the present application provides an electric all-terrain vehicle 100, including a frame 11, a body cover 12, a running assembly 13, a power assembly (not shown) and a power battery pack 14 ( Figure 1 (not shown in the figure). The body cover 12 is at least partially arranged on the frame 11 and fixedly connected to the frame 11. The running assembly 13 includes two front wheels 131 and two rear wheels 132, the two front wheels 131 are rotatably arranged at the front end of the frame 11, and the two rear wheels 132 are rotatably arranged at the rear end of the frame 11, and the front wheels 131 and the rear wheels 132 are at least partially located below the frame 11 to support the frame 11. The power assembly includes a motor, which is supported by the frame 11 and connected to the frame 11. The output shaft of the power assembly is connected to both the front wheels 131 and the rear wheels 132 through a transmission structure to provide rotational power to both the front wheels 131 and the rear wheels 132 of the running assembly 13. The power battery pack 14 is connected to the frame 11, and the power battery pack 14 supplies power to the power assembly through a cable.

[0028] Reference Figure 2 In some embodiments, the power battery pack 14 includes a battery housing 141 and battery cells (not shown), with the battery cells disposed within the battery housing 141. In some embodiments, the battery cells are cylindrical lithium batteries. In other embodiments, the battery cells may also be sheet-shaped batteries.

[0029] In some embodiments, the battery housing 141 is equipped with high-voltage components (not shown). In environments with large temperature fluctuations, such as those found in Europe and the United States, condensation can easily form inside the power battery pack 14. When this condensation accumulates, it flows through and comes into contact with the high-voltage components, potentially causing a short circuit. Therefore, a moisture absorption and drying device is required within the power battery pack 14 to absorb the condensation and reduce the risk of short circuits in the high-voltage components.

[0030] In some embodiments, the power battery pack 14 further includes a water absorption assembly 142, which is the aforementioned moisture absorption and drying device. The water absorption assembly 142 is removably mounted on the battery shell 141 and is configured to absorb water within the battery shell 141. In some embodiments, the water absorption assembly 142 can absorb liquid water, gaseous water, and vaporous water within the battery shell 141, thereby keeping the interior of the battery shell 141 dry and reducing the risk of short circuits within the battery shell 141. By replacing the water absorption assembly 142, the water absorption efficiency of the water absorption assembly 142 in absorbing water within the battery shell 141 can be maintained, thereby reducing the risk of short circuits within the battery shell 141.

[0031] In other embodiments, the power battery pack 14 may also be applied to vehicles such as two-wheeled vehicles, three-wheeled vehicles, or other types of four-wheeled vehicles.

[0032] Reference Figure 2 and Figure 3 The battery case 141 includes a bottom plate 1411, an upper cover 1412, a left side plate 1413, a right side plate 1414, a front panel 1415, and a back panel (not shown in the figure). The front panel 1415 and the back panel are sequentially arranged on the bottom plate 1411 in the front-to-back direction, and the left side plate 1413 and the right side plate 1414 are sequentially arranged on the bottom plate 1411 in the left-to-right direction. The left side plate 1413, the front panel 1415, the right side plate 1414, and the back panel are sequentially connected end to end. The upper cover 1412 is located above the bottom plate 1411 and is connected to the left side plate 1413, the front panel 1415, the right side plate 1414, and the back panel. In some embodiments, the bottom plate 1411, the upper cover 1412, the left side plate 1413, the right side plate 1414, the front panel 1415, and the back panel are sealed and connected to each other by welding. In some embodiments, the bottom plate 1411 , the upper cover plate 1412 , the left side plate 1413 , the right side plate 1414 , the front panel 1415 and the back plate are all formed from metal sheets by a stamping or bending process.

[0033] In some embodiments, the battery shell 141 is provided with a vent 1415a, and the power battery pack 14 further includes an explosion-proof valve 143, which is connected to the battery shell 141 and is configured to block the vent 1415a. The explosion-proof valve 143 is used to open or close the vent 1415a to balance the internal and external air pressure of the battery shell 141. When the explosion-proof valve 143 is opened, moisture outside the battery shell 141 can flow into the interior of the battery shell 141 through the explosion-proof valve 143, thereby increasing the humidity inside the battery shell 141, making it easier to generate condensation water. In some embodiments, the vent 1415a is opened on the front panel 1415. In other embodiments, the vent 1415a can also be opened on the left panel 1413 or the right panel 1414 or the back panel.

[0034] In some embodiments, the battery shell 141 is provided with a mounting hole 1415b, and the mounting hole 1415b is arranged to penetrate along the thickness direction of the battery shell 141 so that the mounting hole 1415b connects the inside and outside of the battery shell 141. In some embodiments, the mounting hole 1415b is opened on the front panel 1415, and the mounting hole 1415b is opened near the air vent 1415a. In some embodiments, the minimum distance between the mounting hole 1415b and the air vent 1415a is 3 mm to 80 mm. In other embodiments, the mounting hole 1415b can also be opened on the left side panel 1413 or the right side panel 1414, as long as the minimum distance between the mounting hole 1415b and the air vent 1415a is in the range of 3 mm to 80 mm.

[0035] Reference Figure 3 and Figure 4 In some embodiments, the moisture absorbing assembly 142 includes a mounting member 1421, an extension member 1422, a moisture absorbing member 1423, and a connector 1424. The connector 1424 is configured to detachably connect the mounting member 1421 to the battery housing 141, so that the mounting member 1421 blocks the mounting hole 1415b. The extension member 1422 connects the moisture absorbing member 1423 and the mounting member 1421. The extension member 1422 is configured to at least partially pass through the mounting hole 1415b and be disposed within the interior of the battery housing 141, so that the moisture absorbing member 1423 is located within the battery housing 141.

[0036] In some embodiments, mounting member 1421 is plate-shaped and is removably secured to front panel 1415 via connector 1424 to block mounting hole 1415b. By positioning hygroscopic member 1423 near explosion-proof valve 143, hygroscopic member 1423 can promptly absorb moisture flowing into battery case 141 through explosion-proof valve 143, thereby improving the moisture absorption efficiency of hygroscopic member 1423.

[0037] In other embodiments, a plurality of mounting holes 1415 b may be dispersedly provided, and a plurality of water absorption components 142 may be provided correspondingly, thereby improving the absorption effect of moisture in the battery shell 141 .

[0038] Reference Figure 4 and Figure 5 In some embodiments, the extension member 1422 is cylindrical, one end of the extension member 1422 is connected to the side wall of the mounting member 1421 facing the mounting hole 1415b, and the other end of the extension member 1422 is inserted into the interior of the battery shell 141 through the mounting hole 1415b. In some embodiments, the hygroscopic member 1423 is arranged around the peripheral wall of the extension member 1422. In some implementations, the hygroscopic member 1423 is adhered to the peripheral wall of the extension member 1422 by 3M adhesive. The hygroscopic member 1423 is brought into contact with the gas inside the battery shell 141 to absorb the gaseous water or vapor water inside the battery shell 141. In other embodiments, the hygroscopic member 1423 can also be brought into contact with the bottom plate 1411 of the battery shell 141 to absorb liquid water flowing to the bottom plate 1411.

[0039] Reference Figure 4 、 Figure 5 and Figure 6 In some embodiments, the mounting member 1421 is provided with a connection hole 1421a, which is provided through the thickness direction of the mounting member 1421, and a plurality of connection holes 1421a are provided sequentially along the circumference of the mounting member 1421. In some embodiments, there are multiple connecting members 1424, and each connecting member 1424 corresponds to a connection hole 1421a.

[0040] In some embodiments, the connecting member 1424 includes a first threaded member 1424a and a second threaded member 1424b. The first threaded member 1424a can be a bolt or screw, and the second threaded member 1424b can be a nut or a nut. The second threaded member 1424b is fixedly connected to the battery shell 141. The screw portion of the first threaded member 1424a is inserted into the corresponding connection hole 1421a and threadedly engaged with the second threaded member 1424b. By tightening the first threaded member 1424a, the head of the first threaded member 1424a can be pressed against the mounting member 1421, thereby fixing the mounting member 1421 to the battery shell 141.

[0041] In some embodiments, the battery case 141 is provided with a plurality of insertion holes 1415c spaced apart along the circumference of the mounting hole 1415b. Each insertion hole 1415c corresponds to a connection hole 1421a, and each insertion hole 1415c is configured to align with the corresponding connection hole 1421a. The second threaded member 1424b is located inside the battery case 141, and the exposed end of the second threaded member 1424b is aligned with the corresponding insertion hole 1415c and welded to the front panel 1415, so that the insertion hole 1415c connects the interior of the second threaded member 1424b with the exterior of the battery case 141. When the first threaded member 1424a is installed, the first threaded member 1424a can be inserted into the second threaded member 1424b through the insertion hole 1415c and threadedly engaged with the second threaded member 1424b. In other embodiments, the second threaded member 1424b can be provided on the exterior of the battery case 141.

[0042] Reference Figure 4 and Figure 7 In some embodiments, the second threaded member 1424b is sealed at one end away from the insertion hole 1415c, thereby reducing the probability of moisture outside the battery shell 141 flowing into the battery shell 141 through the second threaded member 1424b. In other embodiments, the second threaded member 1424b is connected to the battery shell 141 by riveting.

[0043] In some embodiments, a connecting ring 1424c is provided on the peripheral wall of the second threaded member 1424b near its open end. The connecting ring 1424c is in the shape of a closed ring and is configured to be welded to the battery shell 141 so as to connect the second threaded member 1424b to the battery shell 141. The connecting ring 1424c can increase the contact area between the second threaded member 1424b and the battery shell 141 to improve the stability of the second threaded member 1424b connected to the battery shell 141. In some embodiments, a toothed ring 1424d is provided on the peripheral wall of the second threaded member 1424b, and the toothed ring 1424d is located on the side of the connecting ring 1424c near the insertion hole 1415c. The toothed ring 1424d is configured to contact with the flux to further improve the stability of the connection of the second threaded member 1424b.

[0044] In other embodiments, the connector 1424 may also be a structure in which a block and a slot cooperate. In other embodiments, the connector 1424 may also be a mounting screw sleeve fixedly connected to the mounting member 1421, the mounting screw sleeve having an external thread, and the corresponding mounting hole 1415b having an internal thread. The mounting screw sleeve is threadedly engaged with the mounting hole 1415b to connect the mounting member 1421 to the battery shell 141. In other embodiments, the connector 1424 may also be other types of structural members, as long as they can enable the mounting member 1421 to be detachably connected to the battery shell 141.

[0045] Reference Figure 4 and Figure 6 In some embodiments, a sealing ring 1425 is provided between the mounting member 1421 and the battery housing 141. In some embodiments, the sealing ring 1425 is a rubber ring. It is understood that the sealing ring 1425 is provided between the mounting member 1421 and the mutually facing sidewalls of the battery housing 141 to improve the sealing between the mounting member 1421 and the battery housing 141.

[0046] In some embodiments, the side wall of the mounting member 1421 facing the battery shell 141 is provided with a mounting ring groove 1421b, and the extension member 1422 is located in the area surrounded by the mounting ring groove 1421b. The sealing ring 1425 is embedded in the mounting ring groove 1421b. After the mounting member 1421 is fixed to the battery shell 141 through the connecting member 1424, the sealing ring 1425 is tightly attached to the outer wall of the battery shell 141 to achieve the effect of improving the sealing of the connection between the mounting member 1421 and the battery shell 141. By embedding the sealing ring 1425 in the mounting ring groove 1421b, the accuracy of the installation position of the sealing ring 1425 can be improved, and the risk of the sealing ring 1425 falling off and being lost can be reduced.

[0047] In other embodiments, the mounting groove 1421 b may also be provided on the outer wall of the battery shell 141 , and after the mounting member 1421 is fixedly connected to the battery shell 141 , the sealing ring 1425 is tightly attached to the mounting member 1421 .

[0048] In some embodiments, the width of the mounting groove 1421b is smaller than the wall thickness of the sealing ring 1425. When installing the sealing ring 1425, the sealing ring 1425 can be sequentially pressed from one point along the circumference of the sealing ring 1425 to embed the sealing ring 1425 into the mounting groove 1421b.

[0049] In some embodiments, the sealing ring 1425 is provided with a plurality of positioning protrusions 1425a, which are sequentially spaced along the circumference of the sealing ring 1425. In some embodiments, the plurality of positioning protrusions 1425a are distributed on the outer circumferential wall and the inner circumferential wall of the sealing ring 1425, and the positioning protrusions 1425a are integrally formed with the sealing ring 1425.

[0050] The inner wall of mounting ring groove 1421b is provided with a plurality of positioning grooves 1421c, each corresponding to a positioning protrusion 1425a, and each positioning protrusion 1425a is embedded in the corresponding positioning groove 1421c. When installing sealing ring 1425, each positioning protrusion 1425a can be sequentially embedded into the corresponding positioning groove 1421c. This reduces the possibility of sealing ring 1425 undergoing circumferential stretching deformation during the process of being pressed into mounting ring groove 1421b, thereby facilitating the complete insertion of sealing ring 1425 into mounting ring groove 1421b. The cooperation of positioning protrusions 1425a with positioning grooves 1421c also increases the contact area between sealing ring 1425 and mounting member 1421, further enhancing the stability of the connection between sealing ring 1425 and mounting member 1421.

[0051] In other embodiments, the positioning protrusion 1425 a may also be disposed on the inner wall of the mounting ring groove 1421 b , and the corresponding positioning groove 1421 c is disposed on the peripheral wall of the sealing ring 1425 .

[0052] In some embodiments, the present invention replaces the moisture absorbent member 1423 by:

[0053] When the desiccant part 1423 needs to be replaced, the connecting part 1424 is removed and the mounting part 1421 can be removed to remove the desiccant part 1423. Then the mounting part 1421 with the new desiccant part 1423 can be installed to the battery shell 141 through the connecting part 1424. There is no need to disassemble the battery shell 141, which reduces the workload and is easy to operate.

[0054] In other embodiments, the mounting member 1421 may be replaced with a new mounting member 1421 having a new moisture-absorbing member 1423 .

[0055] In addition, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of disclosure of the present application.

Claims

1. A power battery pack, comprising a battery case and a battery cell, wherein the battery cell is disposed inside the battery case; characterized in that: The battery shell is provided with a mounting hole, which communicates with the interior and exterior of the battery shell; the power battery pack further comprises a water absorption assembly, which comprises a mounting member, an extension member, a moisture-absorbing member and a connecting member, wherein the connecting member is configured to detachably connect the mounting member to the battery shell so that the mounting member blocks the mounting hole, the extension member connects the moisture-absorbing member and the mounting member, the extension member is configured to at least partially pass through the mounting hole and be provided inside the battery shell so that the moisture-absorbing member is located inside the battery shell, and the moisture-absorbing member is configured to absorb water in the battery shell.

2. The power battery pack according to claim 1, characterized in that: The moisture absorbing component is arranged around the peripheral wall of the extension component.

3. The power battery pack according to claim 1, characterized in that: The mounting member is provided with a connecting hole, and the connecting member includes a first threaded member and a second threaded member, and the second threaded member is fixedly connected to the battery shell; the first threaded member is inserted into the connecting hole, and the first threaded member and the second threaded member are threadedly matched and connected.

4. The power battery pack according to claim 3, characterized in that: The second threaded member is located inside the battery shell. The battery shell is provided with an insertion hole. The insertion hole communicates the inside of the second threaded member and the outside of the battery shell. The first threaded member passes through the insertion hole.

5. The power battery pack according to claim 4, characterized in that: The second threaded member is sealed at one end away from the insertion hole.

6. The power battery pack according to claim 1, characterized in that: A sealing ring is provided between the mounting member and the battery shell.

7. The power battery pack according to claim 6, characterized in that: The mounting member or the battery shell is provided with a mounting ring groove, and the sealing ring is embedded in the mounting ring groove.

8. The power battery pack according to claim 7, characterized in that: The sealing ring is provided with a plurality of positioning protrusions, and the plurality of positioning protrusions are arranged in sequence at intervals along the circumference of the sealing ring, and the inner wall of the mounting ring groove is provided with a plurality of positioning grooves, each of the positioning grooves corresponds to a positioning protrusion, and each positioning protrusion is embedded in the corresponding positioning groove; or, the inner wall of the mounting ring groove is provided with a plurality of positioning protrusions, and the plurality of positioning protrusions are arranged in sequence at intervals along the circumference of the mounting ring groove, and the sealing ring is provided with a plurality of positioning grooves, each of the positioning grooves corresponds to a positioning protrusion, and each positioning protrusion is embedded in the corresponding positioning groove.

9. The power battery pack according to claim 1, characterized in that: The battery shell is provided with a vent hole, and the power battery pack further includes an explosion-proof valve, which is connected to the battery shell and configured to block the vent hole. The minimum distance between the mounting hole and the vent hole is 3 mm to 80 mm.

10. An electric all-terrain vehicle comprising: Frame; a body panel, the body panel being at least partially disposed on the vehicle frame; a traveling assembly, wherein the traveling assembly is at least partially disposed below the vehicle frame; A power assembly, the power assembly being transmission-connected to the travel assembly; It is characterized in that the electric all-terrain vehicle also includes a power battery pack as described in any one of claims 1 to 9, and the power battery pack is used to supply power to the power component.

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