Anti-removal battery pack

Abstract

This application discloses a detachment prevention battery pack comprising side frames, a cover body, and a bottom plate, wherein a repair cover is attached to the bottom plate, and a first connection structure for preventing removal of the cover body, a second connection structure for preventing removal of the bottom plate, and a third connection structure for preventing removal of the repair cover are provided inside the side frames, and the third connection structure is provided with an unlocking part, such that when the unlocking part is not operated to unlock the repair cover, the repair cover is locked by the third connection structure, the cover body is locked by the first connection structure, and the bottom plate is locked by the second connection structure; when the unlocking part is operated to unlock the repair cover, the second connection structure in the side frames is operated to unlock the bottom plate, and the first connection structure in the side frames is operated to unlock the cover body.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application bearing application number 202310066323.X filed with the China Patent Office on January 29, 2023, and a Chinese patent application bearing application number 202320118366.3 filed with the China Patent Office on January 29, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of battery packs, and more particularly to anti-removal battery packs. [Background technology]

[0003] In the related art, the battery pack is usually fixed inside the vehicle body and has a repair port for easy repair, which means that there is no need to remove the battery pack from the vehicle for repair, but rather it is possible to manually inspect it directly through the repair port at the bottom of the vehicle body, identify the damaged parts and repair them.

[0004] However, in real life, when a car battery pack is damaged or malfunctions, some non-professionals often remove it and repair it without permission. As a result, the battery pack is prone to secondary damage due to improper repair, and there is a risk of safety accidents such as electric shock. Summary of the Invention [Problem to be solved by the invention]

[0005] To overcome at least one of the drawbacks of the prior art described above, the present application provides a removal-proof battery pack, which increases the difficulty of battery removal, preventing unauthorized removal and repair of the battery pack by non-professionals, thereby ensuring the safety of personnel. [Means for solving the problem]

[0006] An object of an embodiment of the present application is to provide a detachment prevention battery pack comprising a side frame, a cover body attached to one side of the side frame, and a bottom plate attached to the other side of the side frame, wherein a repair cover is attached to the bottom plate, and a first connection structure configured to prevent removal of the cover body, a second connection structure configured to prevent removal of the bottom plate, and a third connection structure configured to prevent removal of the repair cover are provided on the inside of the side frame, and the third connection structure is provided with an unlocking part, and when the unlocking part is not operated to release the lock, the repair cover is locked by the third connection structure, the cover body is locked by the first connection structure, and the bottom plate is locked by the second connection structure.

[0007] According to the above configuration, the difficulty of removing the entire battery pack is increased, and it is difficult for a non-expert to remove the battery pack unless he or she follows the correct disassembly order. In addition, it is difficult for a non-expert to identify the unlocking part, so the battery pack cannot be removed without operating the unlocking part, and the function of preventing battery pack removal is improved. [Effects of the Invention]

[0008] The beneficial effects of the present invention are as follows: 1. By providing the first connection structure, the inside of the cover body is connected to the side frame, effectively preventing the cover body from being removed from the outside. 2. By providing a second connection structure, the inside of the bottom guard is connected to the side frame, effectively preventing the bottom guard from being removed from the outside. 3. By providing a third connection structure, the inside of the repair cover is connected to the side frame, effectively preventing the repair cover from being removed from the outside. 4. By providing an unlocking portion, the third connection structure can be unlocked by operating the unlocking portion, thereby enabling the repair cover to be removed and the bottom guard and cover body to be removed from inside the battery pack. 5. The first connection structure, second connection structure, and third connection structure are interrelated and configured to have only a single disassembly sequence, thereby effectively improving the battery pack's ability to prevent removal and reducing the possibility of unauthorized removal or repair by non-professionals. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic front view of a battery pack according to an embodiment of the present invention; [Figure 2] FIG. 1 is a schematic rear view of a battery pack according to an embodiment of the present application. [Figure 3] 3A and 3B are structural schematic diagrams of a side frame of a battery pack according to an embodiment of the present application. [Figure 4] 1 is a schematic diagram of a first connection structure according to an embodiment of the present application. [Figure 5] 1 is a schematic diagram of a partial exploded structure of a battery pack according to an embodiment of the present application. [Figure 6] FIG. 6 is an enlarged view of region A in FIG. 5. [Figure 7] 1 is a schematic diagram of an internal removal structure of a battery pack according to an embodiment of the present application. [Figure 8] FIG. 8 is an enlarged view of region B in FIG. 7. [Figure 9] FIG. 2 is a schematic diagram of an exploded structure of a part of a BMS chamber according to an embodiment of the present application. [Figure 10] FIG. 10 is an exploded schematic view of a third connecting structure according to an embodiment of the present application. [Figure 11] FIG. 10 is an assembly schematic diagram of a third connection structure according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0010] In the description of this application, the orientations or positional relationships indicated by terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are orientations or positional relationships shown based on the drawings, and are intended to facilitate and simplify the description of this application, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be configured, or operate in a particular orientation, and should not be construed as limiting this application.

[0011] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms used herein are for the purpose of describing specific examples only and are not intended to be limiting of the present application.

[0012] In one embodiment, the side beams include a first end beam, a second middle beam, a third end beam, and two side beams, the cover body includes a battery cover and a BMS upper cover, the bottom plate includes a bottom guard and a BMS lower cover, the first end beam, the second middle beam, and the two side beams form a rectangular frame, and are respectively assembled to the edges of the battery cover and the bottom guard to form a hollow battery chamber, and the second middle beam, the third end beam, and the two side beams form a rectangular frame, and are respectively assembled to the edges of the BMS upper cover and the BMS lower cover to form a hollow BMS chamber.

[0013] According to the above configuration, the first connection structure, the second connection structure, and the third connection structure are connected to each other, which reduces the difficulty of removal.

[0014] In one embodiment, the first connection structure comprises a first connection member provided within the cover body and a second connection member provided on the side beam, wherein the first connection member and the second connection member are detachably connected.

[0015] According to the above configuration, the cover body can be connected and fixed to the inside of the side building, and when attempting to remove the cover body from the outside, the cover body cannot be removed from the outside because it is subjected to a pulling action by the first connecting member and the second connecting member located inside.

[0016] In one embodiment, the second connection structure comprises a first insertion member provided on the inside of the bottom guard, a second insertion member provided on the first end beam, a third locking member provided on the inside of the bottom guard, and a fourth locking member provided on the side beam, wherein the first insertion member and the second insertion member are detachably connected, and the third locking member and the fourth locking member are detachably connected.

[0017] According to the above configuration, one end of the bottom guard can be engaged with the first insert member and the second insert member, and the other end can be connected and fixed with the third locking member and the fourth locking member. When attempting to remove the bottom guard from the outside, the bottom guard is subjected to pulling forces from the first insert member, the second insert member, the third locking member, and the fourth locking member simultaneously, making it impossible to remove the bottom guard from the outside.

[0018] In one embodiment, the fourth locking member comprises a fixed portion located at one end of the fourth locking member and configured to be connected to the side beam, and a hook-shaped portion located at the other end of the fourth locking member and configured to be connected to the third locking member.

[0019] According to the above configuration, the fourth locking member can be fixed to the inside of the side beam, and the third locking member can be connected and fixed by the fourth locking member.

[0020] In one embodiment, a through groove through which the fourth locking member passes is provided on one of the two ends of the second middle beam closer to the bottom guard, the fixing portion is located within the BMS chamber, and the hook-shaped portion is located within the battery chamber and is configured to lock the second connection structure from within the BMS chamber.

[0021] According to the above configuration, the second connection structure can be easily locked from inside the BMS room, and a single removal procedure can be provided to experts for removal and repair.

[0022] In one embodiment, the third connection structure comprises a first unlocking member provided on the inside of the repair cover, wherein the repair cover is attached to the BMS lower cover, and a second unlocking member provided to penetrate into the third end beam, wherein the end of the second unlocking member located inside the BMS chamber is detachably connected to the first unlocking member, and the unlocking portion is provided at the end of the second unlocking member away from the first unlocking member.

[0023] According to the above configuration, the lock between the second unlocking member and the first unlocking member can be released by operating the second unlocking member, and if the connection between the first unlocking member and the second unlocking member is not released, it is impossible to open the repair cover from the outside.

[0024] In one embodiment, the second unlocking member comprises a bracket nut, a custom bolt arranged to pass through the third end beam, the first unlocking member and the bracket nut in sequence, and a seal ring fitted onto the custom bolt.

[0025] According to the above configuration, the first unlocking member can be unlocked by rotating the custom bolt, and the seal ring increases friction to prevent the custom bolt from loosening due to shaking, making it more difficult for incorrect unlocking to occur.

[0026] In one embodiment, the third end beam has a through-hole mounting tube that communicates with the BMS chamber and is configured to provide space for the custom bolt to pass through, and the seal ring is configured to seal between the custom bolt and an inner wall of the mounting tube.

[0027] According to the above configuration, wear and damage to the third end beam caused by receiving force multiple times can be avoided.

[0028] In one embodiment, the mounting barrel is provided on a side remote from the BMS chamber with a first anti-counterfeiting portion configured to cover the unlocking portion of the second unlocking member.

[0029] According to the above configuration, the unlocking section is covered, which improves the shielding effect of the unlocking section and reduces the possibility of removal by non-professionals.

[0030] In one embodiment, the third end beam is provided on a side thereof away from the BMS chamber with a second anti-counterfeiting portion configured to cover the first anti-counterfeiting portion.

[0031] By adopting the above-described embodiment, it functions as a notification to inform the specialist whether or not the item has been repaired.

[0032] Example 1 of the present application discloses a detachment-preventing battery pack with reference to Figures 1 to 11. This detachment-preventing battery pack includes a side frame 1, a cover body 2, and a bottom plate 3, with the cover body 2 assembled to one side of the side frame 1 and the bottom plate 3 attached to the other side of the side frame 1. Specifically, the side frame 1 comprises a first end beam 11, a second middle beam 12, a third end beam 13 and two side beams 14, the cover body 2 comprises a battery cover 21 and a BMS upper cover 22, the bottom plate 3 comprises a bottom guard 31 and a BMS lower cover 32, the first end beam 11, the second middle beam 12 and the two side beams 14 form a rectangular frame, each of which is assembled to the edge of the battery cover 21 and the edge of the bottom guard 31 to form a hollow battery chamber, and the second middle beam 12, the third end beam 13 and the two side beams 14 form a rectangular frame, each of which is assembled to the edge of the BMS upper cover 22 and the edge of the BMS lower cover 32 to form a hollow BMS chamber.

[0033] Here, a repair cover 4 is attached to the BMS lower cover 32 of the bottom plate 3, and a first connection structure 5 configured to prevent removal of the cover body 2, a second connection structure 6 configured to prevent removal of the bottom plate 3, and a third connection structure 7 configured to prevent removal of the repair cover 4 are provided inside the side frame 1, and the third connection structure 7 is provided with an unlocking portion 73. When the unlocking portion 73 is not operated to release the lock, the repair cover 4 is locked by the third connection structure 7, the cover body 2 is locked by the first connection structure 5, and the bottom plate 3 is locked by the second connection structure 6. When the unlocking portion 73 is operated to release the lock, the repair cover 4 is unlocked, the second connection structure 6 in the side frame 1 is operated to unlock the bottom plate 3, and further the first connection structure 5 in the side frame 1 is operated to unlock the cover body 2. The interconnected structure increases the difficulty of removing the entire battery pack, making it difficult for a non-expert to remove it unless they follow the correct disassembly order, and it is difficult for a non-expert to identify the lock release part 73, making it impossible to remove the battery pack without operating the lock release part 73, thereby improving the battery pack removal prevention function.

[0034] The side frame 1 and cover plate are assembled by locking and fixing the edges with multiple screws from the outside of the cover plate, the side frame 1 and bottom plate 3 are assembled by locking and fixing the edges with multiple screws from the outside of the bottom plate 3, and the repair cover 4 and BMS lower cover 32 are assembled by locking and fixing the edges with multiple screws from the outside of the repair cover 4.

[0035] As shown in FIGS. 3 to 5 , a plurality of first connection structures 5 are provided, and the plurality of first connection structures 5 are uniformly distributed along the two side beams 14 of the battery pack. The first connection structure 5 includes a first connection member 51 and a second connection member 52. The first connection member 51 is provided inside the BMS upper cover 22 and the battery cover 21. In Example 1, the first connection member 51 is fixed to the BMS upper cover 22 and the battery cover 21 by welding. However, in other examples, the first connection member 51 may be fixed by adhesive, screwing, or engagement, among other methods, but is not limited thereto. Each first connection member 51 corresponds to one second connection member 52 and is provided to achieve the connection and assembly effect between the two. Of course, if the number of first connection members 51 and second connection members 52 is too large, the fixation between the cover body 2 and the side frame 1 may be sufficiently stable, so the number of first connection members 51 and second connection members 52 may be different. The first connecting member 51 and the second connecting member 52 are detachably connected to each other, and in the first embodiment, are fixed by fastening with bolts.

[0036] The first connecting member 51 is U-shaped, and both ends of the first connecting member 51 are bent at the connection portion with the inside of the cover plate to increase the contact area between the first connecting member 51 and the cover plate and improve the connection stability between them. The second connecting member 52 is L-shaped, and one side is fixed to the first connecting member 51 with a bolt and the other side is fixed to the inside of the side beam 14, thereby realizing the connection and fixation of the cover body 2 and the side frame 1 inside the battery pack and thereby forming the first removal prevention structure for the battery pack. Therefore, if an attempt is made to remove the cover body 2 from the outside, the first connecting member 51 and the second connecting member 52 located inside will apply a pulling force, making it impossible to remove the cover body 2 from the outside.

[0037] As shown in FIGS. 4 to 8 , the second connection structure 6 includes a first insertion member 61, a second insertion member 62, a third locking member 63, and a fourth locking member 64, and the first insertion member 61 is provided inside the bottom guard 31. In the first embodiment, the first insertion member 61 and the bottom guard 31 are fixed by welding, but in other embodiments, they may be fixed by adhesive, screwing, engagement, or other methods, but are not limited to these. The second insertion member 62 is provided on the first end beam 11, and in the first embodiment, the first end beam 11 and the second insertion member 62 are fixed integrally, but in other embodiments, they may be fixed by adhesive, screwing, welding, or other methods, but are not limited to these. The third locking member 63 is provided inside the bottom guard 31, and in the first embodiment, the third locking member 63 and the bottom guard 31 are fixed by welding, but in other embodiments, they may be fixed by adhesive, screwing, engagement, or other methods, but are not limited to these. The fourth locking member 64 is disposed inside the side beam 14, and in this embodiment 1, the first end beam 11 and the second insert member 62 are fastened together by bolts, but in other embodiments, they may be fastened together by means of engagement, screw fastening, snap fit joint, or other methods, but are not limited to these. The first insert member 61 and the second insert member 62 correspond in number and are provided in quantity of at least one, the third locking member 63 and the fourth locking member 64 correspond in number and are provided in quantity of at least two, the first insert member 61 and the second insert member 62 are detachably connected, and the third locking member 63 and the fourth locking member 64 are detachably connected. In this embodiment 1, the first insertion member 61 and the second insertion member 62 are one, the third locking member 63 and the fourth locking member 64 are two, the first insertion member 61 and the second insertion member 62 are fixed by an insertion method, and the third locking member 63 and the fourth locking member 64 are fixed by a hook type fixation.

[0038] Specifically, a rectangular recess 111 is provided in the center of the inside of the first end beam 11, the second insert member 62 is located within the rectangular recess 111, the second insert member 62 is formed in a strip shape, the first insert member 61 is formed in a U-shape, and both ends of the first insert member 61 are provided with bent portions at their connection portions with the inside of the bottom guard 31 to increase the contact surface between the first insert member 61 and the bottom guard 31 and improve the connection stability therebetween. The third locking member is also formed in a U-shape, and both ends of the third locking member are provided with bent portions at their connection portions with the inside of the bottom guard 31 to increase the contact surface therebetween and improve the connection stability therebetween. Both ends of the second middle beam 12 are connected to the side beams 14, and on the side of both ends of the second middle beam 12 closer to the bottom guard 31, a through groove 121 is provided through which the fourth locking member 64 passes, and the fourth locking member 64 is provided with a fixed portion 641 and a hook-shaped portion 642, the fixed portion 641 is located at one end of the fourth locking member 64 and is configured to be connected to the side beam 14, and the hook-shaped portion 642 is located at the other end of the fourth locking member 64 and is configured to be connected to the third locking member 63, and the fixed portion 641 is located within the BMS chamber and the hook-shaped portion 642 is located within the battery chamber.

[0039] During assembly, the U-shaped notch of the first insert member 61 of the bottom guard 31 is first aligned with the second insert member 62 in the rectangular recess 111 of the first end beam 11. Then, the bottom guard 31 is pushed in, inserting the second insert member 62 into the first insert member 61, and fastening them with external screws. Then, one end of the hook-shaped portion 642 of the fourth locking member 64 is inserted from the BMS chamber through the through-slot 121 into the battery chamber, where it is hooked onto the third locking member 63 and then pulled back, locking the third locking member 63 and the fourth locking member 64. The fixing portion 641 of the third locking member 63 is then fixed to the side beam 14 inside the BMS chamber. In this way, the second battery pack removal prevention structure is formed. Therefore, when attempting to remove the bottom guard 31 from the outside, it will be subjected to pulling forces from the first insert member 61, the second insert member 62, the third locking member 63, and the fourth locking member 64 simultaneously, making it impossible to remove the bottom guard 31 from the outside.

[0040] As shown in FIGS. 9 to 11 , the third connection structure 7 includes a first unlocking member 71 and a second unlocking member 72, and the first unlocking member 71 is provided inside the repair cover 4. In this embodiment, the first unlocking member 71 and the repair cover 4 are welded together; however, in other embodiments, they may be secured together by adhesive, screwing, or engagement, among other methods, but are not limited to these. The outside of the repair cover 4 is attached to the BMS lower cover 32 with several screws so that its edge is locked. The second unlocking member 72 penetrates the third end beam 13, and the end of the second unlocking member 72 located inside the BMS chamber is detachably connected to the first unlocking member 71. In this embodiment, the second unlocking member 72 and the first unlocking member 71 are fastened together by bolts, but in other embodiments, they may be secured together by engagement or rotational fixation, among other methods, but are not limited to these. The unlocking portion 73 may be located at the end of the second unlocking member 72 away from the first unlocking member 71, and may be part of the second unlocking member 72 and located at the end of the second unlocking member 72, or may be provided at the end of the second unlocking member 72 as a single independent part.

[0041] Specifically, the first unlocking member 71 is U-shaped, and both ends of the first unlocking member 71 are provided with bent portions at the joints with the inside of the repair cover 4 to increase the contact surface and improve the joint stability between them. The second unlocking member 72 includes a bracket nut 721, a custom bolt 722, and a seal ring 723, and the custom bolt 722 passes through the third end beam 13 and the center of the U-shaped plate of the first unlocking member 71 in that order to be fastened to the bracket nut 721. The bracket nut 721 may be fixed to the first unlocking member 71 so as to prevent the bracket nut 721 from rotating simultaneously with the rotation of the custom bolt 722, causing slippage and reducing the locking effect.

[0042] The third end beam 13 is penetrated by a mounting tube 724. The mounting tube 724 communicates with the BMS chamber and provides space for the custom bolt 722 to pass through. The seal ring 723 is fitted onto the custom bolt 722 and is configured to seal between the custom bolt 722 and the inner wall of the mounting tube 724. The seal ring 723 increases friction between the custom bolt 722 and the mounting tube 724, preventing loosening of the custom bolt 722 due to shaking and reducing the likelihood of accidental unlocking. The end of the second unlocking member 72 away from the first unlocking member 71 forms the unlocking section 73. A first anti-counterfeiting section 8 is provided on the side of the mounting tube 724 away from the BMS chamber. The first anti-counterfeiting section 8 is configured to cover the unlocking section 73 of the second unlocking member 72, improving the shielding of the unlocking section 73 and reducing the possibility of removal by non-professionals. In this Example 1, the first anti-counterfeiting part 8 is made of a column-shaped rubber stopper material and is configured to block the inside of the mounting tube 724 and cover the lock release part 73, which is the operating part of the custom bolt 722. A second anti-counterfeiting part 9 configured to cover the first anti-counterfeiting part 8 is provided on the side of the third end beam 13 away from the BMS room, and in this Example 1, the second anti-counterfeiting part 9 is an anti-counterfeiting seal that serves as a notice to a specialist whether or not the item has been repaired, and can be set to comply with repair contract clauses such as "removal will void the warranty."

[0043] The unlocking portion 73 of the custom bolt 722 is provided with a cloverleaf-shaped operating groove or operating protrusion, which must be opened in combination with a screwdriver 10 with a corresponding graphic; however, in other embodiments, the graphic of the unlocking portion 73 of the custom bolt 722 may be set to other uncommon graphics, thereby avoiding the use of a conventional screwdriver 10 to easily operate the unlocking portion 73 of the custom bolt 722.

[0044] The third connecting structure 7 allows the lock between the second unlocking member 72 and the first unlocking member 71 to be released by operating the second unlocking member 72, and the repair cover 4 to be opened from the outside, but on the other hand, if the connection between the first unlocking member 71 and the second unlocking member 72 is not released, the repair cover 4 cannot be opened from the outside. This achieves the third removal prevention structure of the battery pack.

[0045] To remove the battery pack for repair, the unlocking procedure must be performed in the correct order. Specifically, the removal procedure involves removing the second anti-counterfeiting seal 9, then removing the first anti-counterfeiting seal 8, and then using a dedicated custom screwdriver 10 to rotate the custom bolt 722's unlocking mechanism 73 (i.e., the cloverleaf-shaped operating groove or protrusion). The custom bolt 722 can then be removed from the outside. After removing the locking screws on the repair cover 4, the repair cover 4 can be removed from the outside. After unplugging the MSD plug and disconnecting the power, the fixing member 641 on the third locking member 63 can be removed, and then the third locking member 63 can be removed. The locking screws on the bottom guard 31 can then be removed from the outside. Finally, the screws between the first connecting member 51 and the second connecting member 52 are removed, and at this time, the multiple lock screws on the battery cover 21 and the BMS upper cover 22 are removed from the outside, and then the battery cover 21 and the BMS upper cover 22 can be removed.

[0046] As a result of the above, the anti-removal battery pack according to the present application has the following technical effects. 1. By providing the first connection structure 5, the connection between the inside of the cover body 2 and the side frame 1 is realized, effectively preventing the cover body 2 from being removed from the outside. 2. By providing the second connection structure 6, the connection between the inside of the bottom guard 31 and the side frame 1 is realized, effectively preventing the bottom guard 31 from being removed from the outside. 3. By providing the third connection structure 7, the connection between the inside of the repair cover 4 and the side frame 1 is realized, effectively preventing the repair cover 4 from being removed from the outside. 4. By providing the unlocking portion 73, the third connection structure 7 can be unlocked by operating the unlocking portion 73, thereby enabling the repair cover 4 to be removed and the bottom guard 31 and cover body 2 to be removed from inside the battery pack. 5. The first connection structure 5, the second connection structure 6, and the third connection structure 7 are interrelated and configured to have only a single disassembly sequence, thereby effectively improving the battery pack's ability to prevent removal and reducing the possibility of unauthorized removal or repair by non-professionals. [Explanation of symbols]

[0047] 1 side frame, 11 first end beam, 111 rectangular recess, 12 second middle beam, 121 through groove, 13 third end beam, 14 side beam, 2 cover body, 21 battery cover, 22 BMS upper cover, 3 bottom plate, 31 bottom guard, 32 BMS lower cover, 4 repair cover, 5 first connecting structure, 51 first connecting member, 52 second connecting member, 6 second connecting structure, 61 first insert member, 62 second insert member, 63 third locking member, 64 fourth locking member, 641 fixing portion, 642 hook-shaped portion, 7 third connecting structure, 71 first unlocking member, 72 second unlocking member, 721 bracket nut, 722 custom bolt, 723 seal ring, 724 mounting tube, 73 unlocking portion, 8 first anti-counterfeiting portion, 9 second anti-counterfeiting portion, 10 screwdriver.

Claims

1. A removal-resistant battery pack, A side frame (1), a cover body (2) attached to one side of the side frame (1); a bottom plate (3) attached to the other side of the side frame (1); where: A repair cover (4) is attached to the bottom plate (3), The side frame (1) is provided on its inner side with a first connection structure (5) configured to prevent the cover body (2) from being removed, a second connection structure (6) configured to prevent the bottom plate (3) from being removed, and a third connection structure (7) configured to prevent the repair cover (4) from being removed. The third connection structure (7) is provided with an unlocking portion (73), When the unlocking portion (73) is not operated and unlocked, the repair cover (4) is locked by the third connecting structure (7), the cover body (2) is locked by the first connecting structure (5), and the bottom plate (3) is locked by the second connecting structure (6). Anti-removal battery pack.

2. The side frame (1) comprises a first end beam (11), a second middle beam (12), a third end beam (13) and two side beams (14); The cover body (2) includes a battery cover (21) and a BMS upper cover (22), The bottom plate (3) includes a bottom guard (31) and a BMS lower cover (32), The first end beam (11), the second middle beam (12), and the two side beams (14) form a rectangular frame, which are respectively attached to the edge of the battery cover (21) and the edge of the bottom guard (31) to form a hollow battery chamber; The second middle beam (12), the third end beam (13), and the two side beams (14) form a rectangular frame, and are respectively assembled to the edge of the BMS upper cover (22) and the edge of the BMS lower cover (32), thereby forming a hollow BMS chamber. The removal prevention battery pack according to claim 1 .

3. The first connection structure (5) is a first connecting member (51) provided in the cover body (2); a second connecting member (52) provided on the side beam (14), Here, the first connecting member (51) and the second connecting member (52) are detachably connected. The removal prevention battery pack according to claim 2 .

4. The second connection structure (6) is a first insertion member (61) provided inside the bottom guard (31); a second insertion member (62) provided on the first end beam (11); a third locking member (63) provided on the inside of the bottom guard (31); a fourth locking member (64) provided on the side beam (14), Here, the first insertion member (61) and the second insertion member (62) are detachably connected, and the third locking member (63) and the fourth locking member (64) are detachably connected.

4. The removal prevention battery pack according to claim 2 or 3.

5. The fourth locking member (64) a fixing portion (641) located at one end of the fourth locking member (64) and configured to be connected to the side beam (14); a hook-shaped portion (642) located at the other end of the fourth fastening member (64) and configured to be connected to the third fastening member (63); The removal prevention battery pack according to claim 4.

6. A through groove (121) through which the fourth locking member (64) passes is provided on one of both ends of the second middle beam (12) closer to the bottom guard (31), The fixing portion (641) is located in the BMS chamber, and the hook-shaped portion (642) is located in the battery chamber and configured to lock the second connection structure (6) from within the BMS chamber. The removal prevention battery pack according to claim 5.

7. The third connection structure (7) is a first lock release member (71) provided inside the repair cover (4) attached to the BMS lower cover (32); a second unlocking member (72) provided to penetrate through the third end beam (13), wherein an end of the second unlocking member (72) located within the BMS chamber is detachably connected to the first unlocking member (71), and the unlocking portion (73) is provided at an end of the second unlocking member (72) away from the first unlocking member (71); 4. The removal prevention battery pack according to claim 2 or 3.

8. The second unlocking member (72) A bracket nut (721); a custom bolt (722) that passes through the third end beam (13), the first lock release member (71), and the bracket nut (721) in that order; a seal ring (723) fitted onto the custom bolt (722); The removal prevention battery pack according to claim 7.

9. The third end beam (13) is provided with a through-hole mounting tube (724), The mounting sleeve (724) is configured to communicate with the BMS chamber and provide a space through which the custom bolt (722) passes; The seal ring (723) is configured to seal between the custom bolt (722) and the inner wall of the mounting sleeve (724). The removal prevention battery pack according to claim 8.

10. The end of the second unlocking member (72) away from the first unlocking member (71) becomes the unlocking portion (73), A first anti-counterfeiting part (8) configured to cover the unlocking part (73) of the second unlocking member (72) is provided on the side of the mounting cylinder (724) away from the BMS chamber. The removal prevention battery pack according to claim 9.

11. A second anti-counterfeiting part (9) configured to cover the first anti-counterfeiting part (8) is provided on the side of the third end beam (13) away from the BMS chamber. The removal prevention battery pack according to claim 10.

Images