Battery pack and electric device

Abstract

The utility model relates to the technical field of power battery packs, and provides a battery pack and an electric device, the battery pack comprises a battery pack, a liquid cooling plate and a battery pack mounting assembly arranged between the battery pack and the liquid cooling plate; the battery pack mounting assembly is connected with the battery pack, a plug-in structure is arranged between the battery pack mounting assembly and the liquid cooling plate, and the battery pack mounting assembly is connected to the liquid cooling plate through the plug-in structure. According to the battery pack disclosed by the utility model, the battery pack mounting assembly is connected with the liquid cooling plate through the arranged plug-in structure in a plug-in manner, so that when the battery pack is replaced, the problem that direct adhesive connection between the battery pack and the liquid cooling plate in a traditional battery pack structure is not beneficial to after-sales maintenance operation can be solved, and destructive disassembly is not needed when the battery pack is replaced; and meanwhile, the operation of replacing the battery pack is simplified, and the after-sales operation difficulty can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, especially a battery pack. BACKGROUND

[0002] In new energy vehicles, the battery pack is an important component, and its performance directly determines the user's driving experience and even personal safety. In fact, the daily use of the battery pack will inevitably lead to its life attenuation and performance decline. When its performance and safety performance decline to a certain extent and can no longer meet the use requirements of people, the old battery pack needs to be replaced and a new battery pack needs to be installed.

[0003] At present, for the CTP (Cell To Pack) battery pack, the battery pack is adhered to the water-cooled plate by means of a heat-conducting structure, and then installed in the lower shell. However, when replacing the old battery pack, the adhesive needs to be removed to disassemble the battery pack, but it is difficult to remove the adhesive, and the liquid-cooled plate is easily damaged or needs to be destructively removed, which is not conducive to after-sales maintenance operation. SUMMARY

[0004] Therefore, the utility model aims to provide a battery pack to facilitate the disassembly and replacement of the battery pack when replacing the old battery pack, and to reduce the difficulty of after-sales operation.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A battery pack comprises a battery pack, a liquid-cooled plate, and a battery pack mounting assembly arranged between the battery pack and the liquid-cooled plate.

[0007] The battery pack mounting assembly is connected to the battery pack, and an insertion structure is arranged between the battery pack mounting assembly and the liquid-cooled plate. The battery pack mounting assembly is connected to the liquid-cooled plate through the insertion structure.

[0008] Further, the insertion structure comprises an insertion head arranged on the battery pack mounting assembly and an insertion hole arranged on the liquid-cooled plate. The battery mounting assembly is connected to the liquid-cooled plate through the insertion of the insertion head and the insertion hole.

[0009] Further, the battery pack mounting assembly comprises a support plate and a heat-conducting pad stacked together. The support plate is provided with the insertion head. The heat-conducting pad is provided with a through hole for the insertion head to pass through.

[0010] Further, the heat-conducting pad is made of rubber or silicone.

[0011] Further, the liquid cooling plate is provided with a sink, and a plurality of limiting arms are arranged along the circumferential direction of the sink wall in the sink, each of the limiting arms extends along the radial direction of the sink, and the end portions of each of the limiting arms jointly define the insertion hole; when the plug-in connector is inserted into the insertion hole, each of the limiting arms abuts on the plug-in connector.

[0012] Further, the limiting arm is provided with a guide portion, and the guide portion is used for guiding the plug-in connector to be inserted into the plug-in hole.

[0013] Further, the guide portion comprises a roller rotatably arranged on the limiting arm.

[0014] Further, the plug-in structure is arranged between the battery mounting assembly and the liquid cooling plate.

[0015] Further, the battery pack further comprises a plurality of connecting pieces arranged at the four corners of the battery pack; in the height direction of the battery pack, each of the connecting pieces sequentially passes through the mounting hole on the battery pack, the through hole on the battery mounting assembly and the connecting hole on the liquid cooling plate from top to bottom, and is connected to the lower shell of the battery pack.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The battery pack is provided with the battery mounting assembly arranged between the battery pack and the liquid cooling plate, the bottom of the battery pack is connected with the battery mounting assembly, the plug-in structure is arranged between the battery mounting assembly and the liquid cooling plate, and the battery mounting assembly is connected with the liquid cooling plate through the plug-in structure. Therefore, when the battery pack is replaced, the plug-in structure is disengaged, the battery pack can be easily disassembled, the liquid cooling plate is protected from damage, and the subsequent use is ensured, thereby solving the problem that the direct adhesive connection between the battery pack and the liquid cooling plate in the traditional battery pack structure is not conducive to the after-sales maintenance operation, and the battery pack can be replaced without destructive disassembly, thereby simplifying the operation of replacing the battery pack and reducing the difficulty of after-sales operation.

[0018] In addition, the plug-in structure adopts the cooperation of the plug-in connector and the plug-in hole, and the structure is simple and easy to operate. The battery mounting assembly comprises the stacked support plate and the heat-conducting pad, the support plate can better support the bottom of the battery pack, the heat-conducting pad can meet the heat exchange requirement between the battery pack and the liquid cooling plate, the plug-in connector is arranged on the support plate, the through hole is arranged on the heat-conducting pad, the plug-in connector can pass through the through hole and be inserted into the insertion hole, and therefore the installation and fixation of the heat-conducting pad are facilitated.

[0019] Secondly, the heat-conducting pad is made of rubber or silica gel, which has good heat conductivity and shock absorption, can meet the heat exchange requirement between the battery pack and the liquid cooling plate, and can also shock absorb and prevent the battery pack from slipping. The sink groove is arranged on the liquid cooling plate, and a plurality of limiting arms are arranged in the sink groove and are arranged in a circumferential direction of the groove wall, so that the limiting arms extend in a radial direction of the sink groove and jointly define the insertion hole. When the plug is inserted into the insertion hole, the limiting arms abut on the plug, which can provide good fixing force and ensure the stability of the plug connection between the battery pack mounting assembly and the liquid cooling plate.

[0020] Furthermore, the guide part is arranged, which is beneficial to guide the plug to be smoothly inserted into the insertion hole. The guide part is a roller rotatably arranged on the end of the limiting arm, so that the roller is rolled to guide the plug to be smoothly inserted into the insertion hole, and the frictional resistance in the process of inserting or dismounting the plug can be reduced.

[0021] In addition, a plurality of plug structures are arranged in a spaced manner, which can further improve the plug connection effect between the battery pack mounting assembly and the liquid cooling plate. The connecting piece is arranged, and the connecting piece sequentially passes through the first via hole of the battery pack, the mounting hole on the battery pack mounting assembly, the through hole on the battery pack mounting assembly and the connecting hole on the liquid cooling plate from top to bottom, and is connected with the lower shell of the battery pack. In this way, the reliability of fixing the battery pack on the lower shell of the battery pack can be improved. When replacing the old battery pack, only the connecting piece needs to be disassembled, and the battery pack needs to be pulled out to replace the new battery pack, so that the risk of damaging the liquid cooling plate during disassembly of the traditional battery pack structure can be avoided, and the operation difficulty in after-sales can be reduced.

[0022] Another purpose of the utility model is to provide a power device, wherein the power device is provided with the battery pack as described above.

[0023] The power device of the utility model adopts the above-mentioned battery pack, can easily dismount and replace the battery pack, can protect the liquid cooling plate from being damaged and meet the subsequent continuous use, makes the operation of replacing the battery pack simpler, reduces the operation difficulty in after-sales, and further improves the use effect of the power device. ACCURACY OF DRAWINGS

[0024] The accompanying drawings, which form a part of the present application, are used to provide a further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The present application is not limited by the accompanying drawings. In the drawings:

[0025] Figure 1 A partial structure diagram of the battery pack described in the embodiments of the utility model;

[0026] Figure 2 A partial explosion view of the battery pack described in the embodiments of the utility model;

[0027] Figure 3 A support plate structure schematic view of the embodiment of the utility model is shown in the figure;

[0028] Figure 4 For Figure 3 A side view of the A part;

[0029] Figure 5 A heat-conducting pad structure schematic view of the embodiment of the utility model is shown in the figure;

[0030] Figure 6 A liquid cooling plate structure schematic view of the embodiment of the utility model is shown in the figure;

[0031] Figure 7 A plug hole structure schematic view of the embodiment of the utility model is shown in the figure;

[0032] Figure 8 For Figure 7 A B part enlarged view;

[0033] Figure 9 For Figure 7 A C-C view structure schematic view;

[0034] Mark explanation:

[0035] 1, battery pack; 2, support plate; 3, heat-conducting pad; 4, liquid cooling plate; 5, connecting piece;

[0036] 21, plug; 211, end; 212, reduced diameter section; 22, first through hole; 31, via hole; 32, second through hole; 41, plug hole; 42, connecting hole; 411, limiting arm; 412, roller; 10, lower shell. Specific implementation

[0037] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0038] In the description of the utility model, it should be noted that if the terms such as "upper", "lower", "inner", "outer" and the like indicating the orientation or position relationship appear, it is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or implied that the indicated device or element must have a specific orientation, a specific orientation and operation, so it cannot be understood as a limitation on the utility model. In addition, if the terms such as "first", "second" appear, they are also used for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0039] Moreover, in the description of the utility model, unless otherwise explicitly limited, the terms "mounting", "connecting", "connecting", "connecting piece" should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be mechanically connected, or it can be electrically connected. It can be directly connected, or it can be indirectly connected through an intermediate medium. It can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific circumstances.

[0040] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0041] Embodiment one

[0042] The embodiment relates to a battery pack which can facilitate the disassembly and replacement of a battery pack 1 when replacing an old battery pack 1, make the replacement operation of the battery pack 1 simpler, and reduce the difficulty of after-sales operation.

[0043] In the overall structure, as shown in Figure 1 and Figure 2 The battery pack of the embodiment comprises a battery pack 1, a liquid cooling plate 4, and a battery pack mounting assembly arranged between the battery pack 1 and the liquid cooling plate 4.

[0044] The battery pack mounting assembly is connected with the battery pack 1, and a plug-in structure is arranged between the battery pack mounting assembly and the liquid cooling plate 4. The battery pack mounting assembly is connected on the liquid cooling plate 4 through the plug-in structure.

[0045] At this time, in the structure as above, one side of the battery pack mounting assembly is fixedly connected with the battery pack 1, and the other side is plug-in connected with the liquid cooling plate 4 through the plug-in structure. In this way, when the battery pack 1 is replaced, the plug-in structure is disengaged from the plug-in cooperation, so that the battery pack 1 can be easily disassembled from the liquid cooling plate 4, and the liquid cooling plate 4 can be protected from damage and meet the subsequent continued use, thereby solving the problem that the direct adhesive connection between the battery pack 1 and the liquid cooling plate 4 in the traditional battery pack structure is not conducive to the after-sales maintenance operation, and the battery pack 1 does not need to be destructively removed when replaced, so that the operation of replacing the battery pack 1 is simplified, and the difficulty of after-sales operation is reduced.

[0046] Based on the overall introduction as above, in detail, continue to refer to Figure 1 and Figure 2 , and in combination with Figures 3 to 6As shown, one side of the battery pack mounting assembly is fixed at the bottom of the battery pack 1, and the other side of the battery pack mounting assembly is provided with a plug-in structure with the liquid cooling plate 4. As a preferred embodiment, the plug-in structure includes a plug-in head 21 provided on the battery pack mounting assembly, and a plug-in hole 41 provided on the liquid cooling plate 4. The battery mounting assembly is connected to the liquid cooling plate 4 through the plug-in connection of the plug-in head 21 and the plug-in hole 41. In this way, the plug-in connection of the battery mounting assembly and the liquid cooling plate 4 is realized through the cooperation of the plug-in head 21 and the plug-in hole 41, which is simple in structure and easy to operate.

[0047] In terms of specific structure, as a more preferred embodiment, in the present embodiment, a sink is provided on the side of the liquid cooling plate 4 facing the battery pack 1, and the plug-in head 21 is provided on the sink. Figures 6 to 8 As shown, the sink is provided with a plurality of limiting arms 411 arranged along the circumference of the groove wall, each limiting arm 411 extends along the radial direction of the sink, and the end portions of each limiting arm 411 together define a plug-in hole. When the plug-in head 21 is inserted into the plug-in hole, each limiting arm 411 abuts against the plug-in head 21. At this time, the limiting arms 411 are used to abut against the plug-in head 21 in the plugged state, which can provide a better fixing force and ensure the stability of the plug-in connection between the battery pack mounting assembly and the liquid cooling plate 4.

[0048] In specific implementation, the limiting arms 411 can be made of high-strength steel, and can be fixed on the groove wall of the sink by bonding, clamping or welding. As a preferred embodiment, the limiting arms 411 are four, and the opposite two limiting arms 411 are arranged on a line and cross each other.

[0049] It should be noted that in addition to the above arrangement, the limiting arms 411 can also have other structural forms, such as a protrusion arranged on the groove wall of the sink. When the plug-in head 21 is inserted into the plug-in hole, the protrusion is used to abut against the plug-in head 21 to ensure the stability of the plug-in connection between the plug-in head 21 and the plug-in hole 41. It is also possible. It should be noted that in addition to being arranged in four, the limiting arms 411 can also be arranged in two, three, five or any number.

[0050] In order to smoothly insert the plug-in head 21 into the plug-in hole 41, a guide portion is provided on the limiting arm 411 in the present embodiment, which is used to guide the plug-in head 21 to be inserted into the plug-in hole 41. In specific implementation, as a preferred embodiment, the guide portion of the present embodiment includes a roller 412 rotatably provided on the end portion of the limiting arm 411. In this way, during the process of inserting the plug-in head 21 into the plug-in hole, the rolling of the roller 412 guides the plug-in head 21 to be smoothly inserted, and also reduces the frictional resistance during the insertion of the plug-in head 21.

[0051] In addition, it is worth mentioning that the plug-in connector 21 of the embodiment is structurally, as shown in Figure 4 the end 211 is approximately spherical, and has a reduced diameter section 212 connected between the spherical end 211 and the battery pack mounting assembly. During the plug-in process of the plug-in connector 21, the spherical end 211 can cause the limiting arm 411 to deform slightly, and after the end 211 is plugged in place, the limiting arm 411 resets and abuts against the reduced diameter section 212 of the plug-in connector 21, thereby further ensuring the reliability of the plug-in connection between the plug-in connector 21 and the plug-in hole 41.

[0052] Furthermore, it is also worth mentioning that the guide portion provided at the end of the limiting arm 411 can also be, for example, a guide surface formed at the end of the limiting arm 411, in addition to the structure of the roller 412.

[0053] As a preferred embodiment, in the embodiment, the battery pack mounting assembly includes a support plate 2 and a heat-conducting pad 3 stacked together. The support plate 2 and the heat-conducting pad 3 are structurally in the form of a rectangular sheet. The support plate 2 is provided with the plug-in connector 21, and the heat-conducting pad 3 is provided with a through hole 31 for the plug-in connector 21 to pass through. The support plate 2 is provided to better support the bottom of the battery pack 1, and the heat-conducting pad 3 is provided to meet the heat exchange requirements between the battery pack 1 and the liquid cooling plate 4.

[0054] In specific implementation, one side of the support plate 2 is fixedly connected to the bottom of the battery pack 1 by adhesion, for example, by using a heat-conducting structural adhesive to adhesively fix the support plate 2 and the bottom of the battery pack 1 together. The plug-in connector 21 is arranged on the side of the support plate 2 that faces away from the bottom of the battery pack 1. In specific assembly, the through hole 31 on the heat-conducting pad 3 corresponds to the plug-in connector 21, so that the plug-in connector 21 on the support plate 2 passes through the through hole 31 on the heat-conducting pad 3, and then is plug-in connected to the plug-in hole 41 on the liquid cooling plate 4.

[0055] As a preference, the heat-conducting pad 3 of the embodiment is made of rubber or silicone, which has good heat conductivity and shock absorption, and can not only meet the heat exchange requirements between the battery pack 1 and the liquid cooling plate 4, but also play a role in shock absorption and anti-skid for the battery pack 1.

[0056] Furthermore, it is worth mentioning that the plug-in structure of the embodiment includes multiple plug-in structures arranged at intervals between the battery pack mounting assembly and the liquid cooling plate 4. At this time, the arrangement of multiple plug-in structures can further improve the plug-in connection effect between the battery pack mounting assembly and the liquid cooling plate 4. In specific structure, that is, the plug-in connectors 21 are arranged at intervals on the support plate 2, and the plug-in holes 41 are arranged at intervals on the liquid cooling plate 4, and the multiple plug-in connectors 21 and the multiple plug-in holes 41 are arranged one by one in correspondence.

[0057] In addition, the battery pack of the embodiment further comprises a plurality of connecting pieces 5 arranged at the four corners of the battery pack 1. In the height direction of the battery pack 1, each connecting piece 5 sequentially passes through the mounting hole on the battery pack 1, the through hole on the battery pack mounting assembly and the connecting hole on the liquid cooling plate 4 from top to bottom, and is connected to the lower shell 10 of the battery pack.

[0058] In this way, by arranging the connecting pieces 5 and sequentially passing the connecting pieces 5 through the first through hole 31 of the battery pack 1, the mounting hole on the battery pack mounting assembly, the through hole on the battery pack mounting assembly and the connecting hole 42 on the liquid cooling plate 4 from top to bottom, and connecting the connecting pieces 5 to the lower shell 10 of the battery pack, the reliability of the fixation of the battery pack 1 on the lower shell 10 of the battery pack can be improved.

[0059] At the same time, when replacing the old battery pack 1, only the connecting pieces 5 need to be disassembled, and the battery pack 1 can be pulled out for replacement with a new battery pack 1, thereby avoiding the risk of damaging the liquid cooling plate 4 when disassembling the traditional battery pack structure, and reducing the difficulty of after-sales operation.

[0060] Specifically, the first through hole 22 is arranged at the four corners of the support plate 2, the second through hole 32 is arranged at the four corners of the heat-conducting pad 3, and the connecting hole 42 is arranged at the four corners of the liquid cooling plate 4. In the specific assembly, the mounting holes on the battery pack 1 are aligned with the first through holes 22 at the corresponding positions on the support plate 2, the second through holes 32 at the corresponding positions on the heat-conducting pad 3, the connecting holes 42 at the corresponding positions on the liquid cooling plate 4, and the fixing holes at the corresponding positions on the lower shell 10 of the battery pack. Then, the connecting pieces 5 sequentially pass through the mounting holes, the first through holes 22, the second through holes 32, the connecting holes 42 and are screwed and fixed in the fixing holes.

[0061] It is worth mentioning that the connecting pieces 5 are preferably bolts, and when the bolts are connected, for example, a gasket or fastening glue is arranged or applied, to prevent the bolts from loosening during subsequent use of the battery pack. In addition, it is also worth mentioning that the connecting pieces 5 can be arranged at intervals on the long sides and short sides of the battery pack 1, which is also possible.

[0062] The battery pack of the embodiment can solve the problem that the direct adhesive connection between the battery pack 1 and the liquid cooling plate 4 in the traditional battery pack structure is not conducive to after-sales maintenance operation, and when replacing the battery pack 1, only the bolts need to be disassembled, and the battery pack 1 can be pulled out for replacement with a new battery pack 1, thereby simplifying the operation of replacing the battery pack 1, reducing the difficulty of after-sales operation, and having good use effect.

[0063] Embodiment Two

[0064] The embodiment relates to an electric device, wherein the electric device is provided with the battery pack of embodiment one, and the battery pack is used to provide electric energy.

[0065] The power utilization device of the embodiment can realize easy dismounting and replacement of the battery pack 1 by adopting the battery pack of the first embodiment, can protect the liquid cooling plate 4 from being damaged and meet subsequent continuous use, can make the operation of replacing the battery pack 1 simpler, can reduce the difficulty of after-sales operation, and can further improve the use effect of the power utilization device.

[0066] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1.A battery pack, characterized in that: comprising a battery pack, a liquid cooling plate, and a battery pack mounting assembly arranged between the battery pack and the liquid cooling plate; the battery pack mounting assembly is connected with the battery pack, and a plug-in structure is arranged between the battery pack mounting assembly and the liquid cooling plate, and the battery pack mounting assembly is connected on the liquid cooling plate through the plug-in structure. 2.The battery pack according to claim 1, characterized in that: the plug-in structure comprises a plug-in head arranged on the battery pack mounting assembly, and a plug-in hole arranged on the liquid cooling plate; and the battery pack mounting assembly is connected on the liquid cooling plate through plug-in of the plug-in head and the plug-in hole. 3.The battery pack according to claim 2, characterized in that: the battery pack mounting assembly comprises a support plate and a heat-conducting pad stacked together; the plug-in head is arranged on the support plate; and a through hole is arranged on the heat-conducting pad, and the through hole is used for passing the plug-in head. 4.The battery pack according to claim 3, characterized in that: the heat-conducting pad is made of rubber or silicone. 5.The battery pack according to claim 3, characterized in that: a sink groove is arranged on the liquid cooling plate, a plurality of limiting arms are arranged on the sink groove in a circumferential direction of the sink groove, each limiting arm extends in a radial direction of the sink groove, and the end portions of the limiting arms jointly define the plug-in hole; and each limiting arm abuts on the plug-in head when the plug-in head is plugged into the plug-in hole. 6.The battery pack according to claim 5, characterized in that: a guide portion is arranged on each limiting arm, and the guide portion is used for guiding the plug-in head to be plugged into the plug-in hole. 7.The battery pack according to claim 6, characterized in that: the guide portion comprises a roller rotatably arranged on the end portion of the limiting arm. 8.The battery pack according to claim 1, characterized in that: a plurality of plug-in structures are arranged between the battery pack mounting assembly and the liquid cooling plate. 9.The battery pack according to any one of claims 1 to 8, characterized in that: further comprising a plurality of connecting members arranged at four corners of the battery pack; and in a height direction of the battery pack, each connecting member passes through, in sequence from top to bottom, a mounting hole on the battery pack, a through hole on the battery pack mounting assembly, and a connecting hole on the liquid cooling plate, and is connected on a lower shell of the battery pack. 10.An electric device, characterized in that: the electric device is provided with the battery pack according to any one of claims 1 to 9. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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