End plate structure and battery module

Abstract

The utility model discloses an end plate structure and a battery module. The end plate structure comprises a fixed part, a movable part, a reset part and a fastening part, the fixing piece is used for being in contact with the battery cell group; the movable part is arranged in the thickness direction of the fixed part, the movable part is movably connected with the fixed part, and the movable part is used for making contact with the steel belt; the reset piece is arranged between the fixed piece and the movable piece, and the reset piece is in a compressed state; the fastener penetrates through the movable part and is in threaded connection with the fixed part, so that thickness adjustment between the movable part and the fixed part is achieved by adjusting the fastener, the compression degree of the reset part is changed along with adjustment of the fastener, and therefore the thickness of the end plate structure is adjusted. Therefore, the problem that the steel belt is loosened when the steel belt restrains the end plate and the battery cell group is solved by adjusting the fastener, the phenomenon that the battery cell or a thicker silica gel sheet is replaced is avoided, the labor intensity is reduced, and the production efficiency of the battery module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery module technical field especially relates to a end plate structure and battery module. BACKGROUND

[0002] With the development of science and technology, battery module assembly is through the cell arrangement together into cell group, through the end plate and steel band to the cell group fastening constraint, again with the welding technology gathers the assembly and cell group forms a whole.

[0003] In the prior art, the end plate includes two, two end plates contact steel band and cell group respectively, the thickness of the end plate cannot be adjusted, when the steel band is relaxed when the steel band is constrained to the end plate and cell group, the labor intensity is increased by replacing the cell or replacing the silica gel piece with thicker thickness, and the production efficiency of the battery module is reduced. UTILITY MODEL CONTENT

[0004] One purpose of the utility model is to provide an end plate structure and battery module, which aims to solve the technical problem that the labor intensity is increased by replacing the cell or replacing the silica gel piece with thicker thickness when the steel band is relaxed when the steel band is constrained to the end plate and cell group, and the production efficiency of the battery module is reduced.

[0005] To achieve the above purpose, the utility model provides a kind of scheme: an end plate structure, the end plate structure is used to be arranged in cell group opposite two ends in module, and be tied by steel band, the end plate structure includes:

[0006] Fixed part is used to contact with the cell group;

[0007] Movable part is arranged in the thickness direction of the fixed part, the movable part and the fixed part are movably connected, and the movable part is used to contact with the steel band;

[0008] Reset part is arranged between the fixed part and the movable part, and the reset part is in compression state;And

[0009] Fastener is threaded through the movable part and is screw connected with the fixed part.

[0010] Optionally, the fixed part includes fixed plate and first side plate, and the first side plate is annularly arranged at the edge of the fixed plate to form a first limiting groove;

[0011] The movable part includes movable plate and second side plate, and the second side plate is annularly arranged at the edge of the movable plate to form a second limiting groove, and the reset part is arranged between the fixed plate and the movable plate;

[0012] The first side plate is inserted into the second limiting groove and in contact with the second side plate, or the second side plate is inserted into the first limiting groove and in contact with the first side plate.

[0013] Optionally, opposite ends of the first side plate are provided with through holes in communication with the first limiting groove, and edges of the second side plate are provided with notches in communication with the second limiting groove, and the notches and the through holes are in communication.

[0014] Optionally, one of the fixed part and the movable part is provided with a positioning column, and the other of the fixed part and the movable part is provided with a positioning hole, and the positioning column is inserted into the positioning hole and in sliding fit with the positioning hole.

[0015] Optionally, the movable part comprises a movable plate and a fixed column, the fixed column is arranged on a side of the movable plate facing the fixed part, and the reset part is sleeved on the fixed column.

[0016] Optionally, the movable plate is provided with a first fixing groove around the fixed column, and an end portion of the reset part is accommodated in the first fixing groove.

[0017] Optionally, a second fixing groove is formed in a side of the fixed part facing the movable part, the fixed column is inserted into the second fixing groove, and an end portion of the reset part is accommodated in the second fixing groove.

[0018] Optionally, the movable part comprises a movable plate and a thickened part, the thickened part is arranged on a side of the movable plate facing the fixed part, the movable part is provided with a countersunk hole penetrating through the movable plate and the thickened part, the fixed part is provided with a screw hole and an avoiding groove surrounding the screw hole, a fastener is connected with the screw hole through the countersunk hole, an end portion of the fastener is accommodated in the countersunk hole, and the thickened part is inserted into the avoiding groove.

[0019] Optionally, the number of the reset parts is multiple, and the multiple reset parts are uniformly arranged along a length direction and a width direction of the end plate structure.

[0020] To achieve the above object, a scheme of the utility model provides a battery module, the battery module comprises: a battery cell group, a steel belt and the end plate structure, the end plate structure is arranged at opposite ends of the battery cell group, and the steel belt is arranged around the end plate structure and the battery cell group.

[0021] The utility model discloses the beneficial effects are that:

[0022] The utility model provides an application in a end plate structure and battery module, fixed part is used for with the contact of electric core group, movable element sets up in the thickness direction of fixed part, movable element and fixed part swing joint, movable element is used for with the contact of steel band, resettable element sets up between fixed part and movable element, resettable element is in compression state, fastener passes movable element and is connected with fixed part screw thread, in order to realize the thickness adjustment between movable element and fixed part through the adjustment fastener, resettable element changes its compression degree along with the adjustment fastener, namely lengthens or shortens, thereby adjusting the thickness of end plate structure, realizes the steel band relaxation condition when the steel band is used for restricting end plate structure and electric core group through the adjustment fastener, avoids through the replacement electric core or the replacement thicker silica gel piece, reduces the labor intensity, improves the production efficiency of battery module. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing of simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to the structure shown in these drawings.

[0024] Figure 1 It is the assembly structure schematic diagram of battery module provided by the utility model embodiment;

[0025] Figure 2 It is the assembly structure schematic diagram of end plate structure provided by the utility model embodiment;

[0026] Figure 3 It is the exploded structure schematic diagram of end plate structure provided by the utility model embodiment;

[0027] Figure 4 It is the cross section structure schematic diagram of end plate structure in the first state provided by the utility model embodiment;

[0028] Figure 5 It is the cross section structure schematic diagram of end plate structure in the second state provided by the utility model embodiment;

[0029] Figure 6 It is shown Figure 5 The local enlarged view of A in;

[0030] Figure 7 It is the cross section structure schematic diagram of end plate structure in the third state provided by the utility model embodiment;

[0031] Figure 8 It is the schematic diagram of fixed part of end plate structure provided by the utility model embodiment;

[0032] Figure 9 is a schematic view of a movable part of an end plate structure.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 100, end plate structure;

[0035] 10, fixed part; 10a, first limiting groove; 10b, positioning hole; 10c, second fixing groove; 10d, screw hole; 10e, avoiding groove; 11, fixed plate; 12, first side plate; 12a, via hole;

[0036] 20, movable part; 20a, second limiting groove; 20b, countersunk hole; 21, movable plate; 21a, first fixing groove; 22, second side plate; 22a, notch; 23, positioning column; 24, fixed column; 25, thickening part;

[0037] 30, reset part;

[0038] 40, fastener;

[0039] 200, battery module; 210, battery cell group; 220, steel belt. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0041] Please refer to the drawings Figures 2-9 The embodiments of the present application provide an end plate structure 100 applied to, and the end plate structure 100 is used for being arranged at opposite ends of a battery cell group 210 in a module and being bundled by a steel belt 220.

[0042] Please refer to the drawings Figures 2-9In the embodiment of the present application, the end plate structure 100 comprises a fixed part 10, a movable part 20, a reset part 30 and a fastening part 40; the fixed part 10 is used to contact the battery cell group 210. The movable part 20 is arranged in the thickness direction of the fixed part 10, and the movable part 20 is movably connected with the fixed part 10, and the movable part 20 is used to contact the steel belt 220. The reset part 30 is arranged between the fixed part 10 and the movable part 20, and the reset part 30 is in a compressed state; the fastening part 40 is arranged through the movable part 20 and is threadedly connected with the fixed part 10. In order to adjust the thickness between the movable part 20 and the fixed part 10 by adjusting the fastening part 40, the reset part 30 changes its compression degree along with the adjustment of the fastening part 40, that is, the reset part 30 becomes shorter when the fastening part 40 moves towards the fixed part 10, and the reset part 30 becomes longer when the fastening part 40 moves away from the fixed part 10, so as to adjust the thickness of the end plate structure 100. In this way, the loosening of the steel belt 220 when the steel belt 220 is used to constrain the end plate structure 100 and the battery cell group 210 can be solved by adjusting the fastening part 40, and the labor intensity is reduced and the production efficiency of the battery module 200 is improved by avoiding replacing the battery cell or replacing the silica gel sheet with a larger thickness.

[0043] Please refer to the accompanying drawings Figures 2-3 Figs. 1 to 8, in the embodiment of the present application, the fixed part 10 is used as a supporting part of the end plate structure 100, and the fixed part 10 is used to support the movable part 20, the reset part 30 and the fastening part 40. The fixed part 10 is used to contact the battery cell group 210, so that the outer surface of the fixed part 10 abuts against the outer surface of the battery cell group 210.

[0044] Please refer to the accompanying drawings Figures 2-3 Figs. 1 to 9, in the embodiment of the present application, the movable part 20 is arranged in the thickness direction of the fixed part 10, and the movable part 20 is movably connected with the fixed part 10, so as to adjust the position of the movable part 20 relative to the fixed part 10, thereby increasing or reducing the thickness of the end plate structure 100 along with the movement of the movable part 20 relative to the fixed part 10. The movable part 20 is used to contact the steel belt 220, so that the outer surface of the movable part 20 abuts against the inner side wall of the steel belt 220.

[0045] Please refer to the accompanying drawings Figures 2-3 In the embodiment of the present application, the reset part 30 is arranged between the fixed part 10 and the movable part 20, and the two ends of the reset part 30 are connected with the fixed part 10 and the movable part 20 respectively, and the reset part 30 is in a compressed state; the reset part 30 changes its compression degree along with the movement of the movable part 20. Optionally, the reset part 30 is a spring.

[0046] Please refer to the accompanying drawings Figures 2-3In the embodiment of the present application, the fastener 40 is threaded through the movable piece 20 and the fixed piece 10, so as to adjust the thickness between the movable piece 20 and the fixed piece 10 by adjusting the fastener 40, and the reset piece 30 changes its compression degree along with the adjustment of the fastener 40, so as to adjust the thickness of the end plate structure 100. Thus, the loosening of the steel belt 220 when the steel belt 220 is used to constrain the end plate structure 100 and the cell group 210 is solved by adjusting the fastener 40, the replacement of the cell or the replacement of the thicker silica gel sheet is avoided, the labor intensity is reduced, and the production efficiency of the battery module 200 is improved.

[0047] At this time, when the fastener 40 moves away from the fixed piece 10, the movable piece 20 moves outward relative to the fixed piece 10, the distance between the movable piece 20 and the fixed piece 10 is increased, the end plate structure 100 is thickened, and the reset piece 30 is unfolded along with the outward movement of the movable piece 20. When the fastener 40 moves towards the fixed piece 10, the movable piece 20 moves inward relative to the fixed piece 10, the distance between the movable piece 20 and the fixed piece 10 is reduced, the end plate structure 100 is thinned, and the reset piece 30 is compressed along with the outward movement of the movable piece 20.

[0048] Please refer to the accompanying drawings Figure 4 The fixed piece 10 includes a fixed plate 11 and a first side plate 12, the first side plate 12 is located on the side of the fixed plate 11 facing the movable piece 20, the first side plate 12 is annularly arranged at the edge of the fixed plate 11 to jointly form a first limiting groove 10a, and the first side plate 12 and the fixed plate 11 serve as the inner side walls of the first limiting groove 10a; the groove opening of the first limiting groove 10a faces the movable piece 20. The movable piece 20 includes a movable plate 21 and a second side plate 22, the second side plate 22 is located on the side of the movable plate 21 facing the fixed piece 10, the second side plate 22 is annularly arranged at the edge of the movable plate 21 to jointly form a second limiting groove 20a, and the second side plate 22 and the movable plate 21 serve as the inner side walls of the second limiting groove 20a; the groove opening of the second limiting groove 20a faces the fixed piece 10, and the reset piece 30 is arranged between the fixed piece 10 and the movable piece 20 through the space of the first limiting groove 10a and the second limiting groove 20a. The reset piece 30 is arranged between the fixed plate 11 and the movable plate 21, so that the fixed plate 11 and the movable plate 21 sandwich the reset piece 30, the reset piece 30 is in a compressed state, and the reset piece 30 is compressed or unfolded along with the movement of the movable plate 21.

[0049] Please refer to the accompanying drawings Figure 4Wherein, the slot diameter of the second limiting slot 20a is larger than the slot diameter of the first limiting slot 10a, the first side plate 12 is inserted into the second limiting slot 20a and contacts with the second side plate 22, so that the outer side wall of the first side plate 12 limits the movement of the second side plate 22 along the circumferential direction of the first side plate 12, and thus the second side plate 22 can only move along the extension direction of the first side plate 12, so that the second side plate 22 moves under the guidance of the first side plate 12, and thus the movable plate 21 moves relative to the fixed plate 11.

[0050] Alternatively, the slot diameter of the second limiting slot 20a is smaller than the slot diameter of the first limiting slot 10a, the second side plate 22 is inserted into the first limiting slot 10a and contacts with the first side plate 12, so that the inner side wall of the first side plate 12 limits the movement of the second side plate 22 along the circumferential direction of the first side plate 12, and thus the second side plate 22 can only move along the extension direction of the first side plate 12, so that the second side plate 22 moves under the guidance of the first side plate 12, and thus the movable plate 21 moves relative to the fixed plate 11.

[0051] Please refer to the accompanying drawings Figures 2-3 The opposite ends of the first side plate 12 are provided with through holes 12a which are in communication with the first limiting slot 10a, and the through holes 12a are used for the long screw to pass through, and the edge of the second side plate 22 is provided with a notch 22a which is in communication with the second limiting slot 20a, and the notch 22a is used for avoiding the long screw, and the notch 22a is in communication with the through hole 12a, and when the second side plate 22 is at any position of the first side plate 12, the long screw is avoided through the notch 22a, so as to prevent the long screw from interfering with the second side plate 22, and thus the movement effect of the second side plate 22 relative to the first side plate 12 is ensured.

[0052] Please refer to the accompanying drawings Figures 5-6In the second embodiment, one of the fixed part 10 and the movable part 20 is provided with a positioning column 23, and the other of the fixed part 10 and the movable part 20 is provided with a positioning hole 10b, and the positioning column 23 is inserted into the positioning hole 10b and is in sliding fit with the positioning hole 10b. At this time, when the movable part 20 is provided with the positioning column 23, the fixed part 10 is provided with the positioning hole 10b, the positioning column 23 is inserted into the positioning hole 10b and is in sliding fit with the positioning hole 10b, the outer contour of the positioning column 23 is matched with the inner contour of the positioning hole 10b, and the inner side wall of the positioning hole 10b limits the movement of the positioning column 23 along the circumferential side of the positioning hole 10b, so that the positioning column 23 can only move along the extension direction of the positioning hole 10b, and the positioning column 23 moves under the guidance of the positioning hole 10b, so that the movable part 20 is guided to move relative to the fixed part 10 through the cooperation of the positioning column 23 and the positioning hole 10b. At the same time, the positioning column 23 is in positioning connection with the positioning hole 10b, the fixed part 10 and the movable part 20 are in positioning connection through the cooperation of the positioning column 23 and the positioning hole 10b, the position accuracy of the movable part 20 relative to the fixed part 10 is ensured, the movable part 20 is prevented from deviating relative to the fixed part 10, and the disassembly and assembly convenience between the movable part 20 and the fixed part 10 is improved.

[0053] Please refer to the accompanying drawings Figure 7 In the third embodiment, the movable part 20 includes a movable plate 21 and a fixed column 24, the fixed column 24 is arranged on the side of the movable plate 21 facing the fixed part 10, and the reset part 30 is sleeved on the fixed column 24, so that the reset part 30 is fixed on the fixed column 24, thereby the fixed column 24 limits the movement of the reset part 30 along the circumferential direction of the fixed column 24, and the position of the reset part 30 relative to the movable plate 21 is ensured, and the reset part 30 is prevented from being separated from the movable plate 21 and the fixed plate 11. At the same time, the reset part 30 is prevented from being deformed due to long-time compression.

[0054] Please refer to the accompanying drawings Figure 7 The movable plate 21 is provided with a first fixing groove 21a around the fixed column 24, the groove opening of the first fixing groove 21a faces the fixed plate 11, and the end of the reset part 30 is accommodated in the first fixing groove 21a, so that the inner side wall of the first fixing groove 21a and the outer side wall of the fixed column 24 cooperatively limit the movement range of the end of the reset part 30, thereby the movement of the reset part 30 along the circumferential direction is limited, and the position of the end of the reset part 30 relative to the movable plate 21 is ensured.

[0055] Please refer to the accompanying drawings Figure 7The side of the fixed part 10 facing the movable part 20 is provided with a second fixed groove 10c, the opening of the second fixed groove 10c faces the movable plate 21, the fixed column 24 is inserted into the second fixed groove 10c, so that the inner side wall of the second fixed groove 10c limits the position of the fixed column 24, and the position of the fixed column 24 relative to the fixed part 10 is ensured. The end of the reset part 30 is accommodated in the second fixed groove 10c, so that the inner side wall of the second fixed groove 10c and the outer side wall of the fixed column 24 cooperate to limit the movement range of the end of the reset part 30, thereby limiting the movement of the reset part 30 in the circumferential direction, and ensuring the position of the end of the reset part 30 relative to the fixed part 10. The first fixed groove 21a, the second fixed groove 10c and the fixed column 24 cooperate to limit the multiple different positions of the reset part 30, preventing the reset part 30 from deforming.

[0056] Please refer to the accompanying drawings Figure 6 In the fourth embodiment, the movable part 20 includes a movable plate 21 and a thickening part 25, the thickening part 25 is arranged on the side of the movable plate 21 facing the fixed part 10, and the thickening part 25 is protruded from the inner side wall of the movable plate 21 towards the fixed part 10. The movable part 20 is provided with a countersunk hole 20b penetrating the movable plate 21 and the thickening part 25, the fixed part 10 is provided with a screw hole 10d and a avoiding groove 10e surrounding the screw hole 10d, the countersunk hole 20b is arranged opposite to the screw hole 10d, and the fastener 40 is connected by penetrating the countersunk hole 20b and the screw hole 10d, so that the fastener 40 is locked to the movable part 20 and the fixed part 10 through the countersunk hole 20b and the screw hole 10d, and the distance between the movable part 20 and the fixed part 10 is adjusted by the rotation of the fastener 40 relative to the screw hole 10d. The end of the fastener 40 is accommodated in the countersunk hole 20b, so that the end of the fastener 40 is in the movable part 20, preventing the end of the fastener 40 from being exposed to the external environment. The outer contour of the thickening part 25 is matched with the inner contour of the avoiding groove 10e, the thickening part 25 is inserted into the avoiding groove 10e, the inner contour of the avoiding groove 10e limits the movement direction of the thickening part 25, and the position of the thickening part 25 relative to the avoiding groove 10e is ensured, so as to realize the positioning connection between the movable part 20 and the fixed part 10, and improve the assembly and disassembly effect between the movable part 20 and the fixed part 10.

[0057] Please refer to the accompanying drawings Figure 3 The number of reset parts 30 is multiple, and the multiple reset parts 30 are uniformly arranged along the length direction and the width direction of the end plate structure 100, so that the multiple reset parts 30 simultaneously exert the reset force on the movable part 20. By arranging multiple reset parts 30, the reset force exerted by the reset part 30 on the movable part 20 is increased, avoiding that the reset force of the reset part 30 is not enough to drive the movable part 20 to move relative to the fixed part 10.

[0058] Please refer to the accompanying drawings Figure 1In the fifth embodiment, a battery module 200 includes a battery cell group 210, a steel belt 220 and an end plate structure 100, the battery cell group 210 includes a plurality of battery cells arranged along a thickness direction of the battery cell group 210, the end plate structure 100 is arranged at opposite ends of the battery cell group 210, and the steel belt 220 is arranged around the end plate structure 100 and the battery cell group 210. The battery cell group 210 is fastened and constrained by the end plate structure 100 and the steel belt 220, and the thickness of the end plate structure 100 is adjusted to solve the slack of the steel belt 220 when the battery cell group 210 is constrained by the steel belt 220, so that the battery cell group 210 is prevented from falling off due to serious slack, the labor intensity is reduced, and the production efficiency of the battery module 200 is improved.

[0059] The utility model has the advantages that:

[0060] The utility model provides an end plate structure 100 and a battery module 200, the fixing piece 10 is used for contacting with the battery cell group 210, the movable piece 20 is arranged in the thickness direction of the fixing piece 10, the movable piece 20 is movably connected with the fixing piece 10, the movable piece 20 is used for contacting with the steel belt 220, the reset piece 30 is arranged between the fixing piece 10 and the movable piece 20, the reset piece 30 is in the compressed state, the fastener 40 is arranged in the movable piece 20 and is screw connected with the fixing piece 10, so as to adjust the thickness between the movable piece 20 and the fixing piece 10 by adjusting the fastener 40, the reset piece 30 changes the tightness along with the adjustment of the fastener 40, thereby adjusting the thickness of the end plate structure 100, so that the slack of the steel belt 220 is solved when the end plate structure 100 and the battery cell group 210 are constrained by the steel belt 220, the labor intensity is reduced, and the production efficiency of the battery module 200 is improved.

[0061] It should be noted that all directional indications, such as upper, lower, left, right, front, back, etc., are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0062] It should also be noted that when an element is referred to as being "fixed to" or "arranged on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0063] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0064] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or directly / indirectly applied in other related technical fields under the utility model concept of the present application is included in the patent protection scope of the present application.

Claims

1. An end plate structure for being disposed at opposite ends of a group of battery cells in a module and being banded with a steel band, characterized by, The end plate structure comprises: a fixed part for contacting the battery cell group; a movable part arranged in the thickness direction of the fixed part, the movable part and the fixed part being movably connected, the movable part being used for contacting the steel belt; a reset part arranged between the fixed part and the movable part, the reset part being in a compressed state; and a fastener penetrating the movable part and being threadedly connected with the fixed part.

2. The end plate structure of claim 1, wherein The fixed part comprises a fixed plate and a first side plate, the first side plate being annularly arranged at the edge of the fixed plate to jointly form a first limiting groove; The movable part comprises a movable plate and a second side plate, the second side plate being annularly arranged at the edge of the movable plate to jointly form a second limiting groove, the reset part being arranged between the fixed plate and the movable plate; The first side plate is inserted into the second limiting groove and contacts the second side plate, or the second side plate is inserted into the first limiting groove and contacts the first side plate.

3. The end plate structure of claim 2, wherein The opposite ends of the first side plate are provided with through holes communicating with the first limiting groove, and the edge of the second side plate is provided with a notch communicating with the second limiting groove, the notch and the through hole being communicated.

4. The end plate structure of claim 1, wherein One of the fixed part and the movable part is provided with a positioning column, and the other of the fixed part and the movable part is provided with a positioning hole, the positioning column being inserted into the positioning hole and being in sliding fit with the positioning hole.

5. The end plate structure according to any one of claims 1 to 4, characterized by The movable part comprises a movable plate and a fixed column, the fixed column being arranged on the side of the movable plate facing the fixed part, and the reset part being sleeved on the fixed column.

6. The end plate structure of claim 5, wherein The movable plate is provided with a first fixing groove around the fixed column, and the end of the reset part is accommodated in the first fixing groove.

7. The end plate structure of claim 5, wherein The side of the fixed part facing the movable part is provided with a second fixing groove, the fixed column is inserted into the second fixing groove, and the end of the reset part is accommodated in the second fixing groove.

8. The end plate structure according to any one of claims 1 to 4, characterized by The movable part comprises a movable plate and a thickening part, the thickening part being arranged on the side of the movable plate facing the fixed part, the movable part being provided with a countersunk hole penetrating the movable plate and the thickening part, the fixed part being provided with a screw hole and an avoiding groove surrounding the screw hole, the fastener being connected with the screw hole by penetrating the countersunk hole, the end of the fastener being accommodated in the countersunk hole, and the thickening part being inserted into the avoiding groove.

9. The end plate structure according to any one of claims 1 to 4, characterized by The number of the reset parts is multiple, and the multiple reset parts are uniformly arranged in the length direction and the width direction of the end plate structure.

10. A battery module, characterized by The battery module comprises a battery cell group, a steel belt and the end plate structure according to any one of claims 1 to 9, the end plate structure being arranged at opposite ends of the battery cell group, and the steel belt being arranged around the end plate structure and the battery cell group.

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