Insulating part of battery, top cover assembly and battery monomer

Abstract

The utility model relates to an insulator of battery, top cover subassembly and battery monomer, including first insulating plate, second insulating plate and clamping subassembly, the first end of second insulating plate and first insulating plate reversible connection, the clamping subassembly includes first fastener and second fastener, in the first fastener and the second fastener, the first end of the second insulating plate is connected with the first insulating plate, and the second end of the second insulating plate is connected with the clamping subassembly. One second buckling piece is arranged on the first insulating plate, the other second buckling piece is arranged on the second insulating plate, the second buckling piece is provided with a plug connector which can slide in the second direction, and the second direction is perpendicular to the first direction; the first buckling piece is provided with a slot, and the slot penetrates through the first buckling piece along at least one end of the second direction; the first direction is the thickness direction of the first insulating plate, the insertion piece and the insertion groove are not easy to separate from each other in the thickness direction of the first insulating plate, and the operation space required by the second buckling piece in the thickness direction of the first insulating plate is small.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an insulating member, a top cover assembly and a battery monomer of a battery. Background Art

[0002] With the development and progress of society, lithium batteries have rapidly entered the public consciousness as a new energy source and are widely used in various fields. As batteries as energy storage devices are gradually gaining social recognition and experiencing rapid development, battery performance and safety are receiving increasing attention. However, inverted tab insertion poses a significant threat to battery safety. Existing technologies often employ methods such as increasing the space for folding the tabs or adding wings to the top cover to prevent inverted tab insertion.

[0003] A Chinese utility model patent with authorization publication number CN220324646U discloses a battery plastic component comprising a plastic body, a liquid injection portion, and a fastening portion. The plastic body comprises a first plastic part and a second plastic part connected to the first plastic part, with the second plastic part disposed below the first plastic part. The liquid injection portion comprises a first liquid injection hole and a second liquid injection hole, and is disposed in the plastic body. The fastening portion comprises a first fastening portion disposed on the first plastic part and a second fastening portion disposed on the second plastic part, the first fastening portion and the second fastening portion being engaged with each other. The liquid injection portion and the fastening portion are arranged along a first direction. In the aforementioned patent, one of the first and second fastening portions is a fastening groove, and the other is an elastic fastening member, which is inserted into the fastening groove to achieve fastening and fixation. The snap-fitting slot has a notch, through which the elastic snap-fitting member enters the snap-fitting slot along the height of the battery. If the dimensions of the elastic snap-fitting member and the snap-fitting slot are significantly different, the first and second snap-fitting portions will have difficulty engaging. If the dimensions of the elastic snap-fitting member and the snap-fitting slot are similar, the elastic snap-fitting member can smoothly enter the snap-fitting slot, but it can also easily escape from the notch, slowing production and increasing defective rates. Improving the production pace and yield of battery insulation components is a pressing technical issue in this field. Utility Model Content

[0004] To this end, the utility model provides a battery insulating member, a top cover assembly and a battery cell which can improve the production rhythm of the battery insulating member and increase the yield rate.

[0005] In order to solve the above technical problems, the present invention provides an insulating member for a battery, comprising:

[0006] a first insulating plate;

[0007] a second insulating plate having a first end along its length, the first end of the second insulating plate being reversibly connected to the first insulating plate;

[0008] a clamping assembly connecting the first insulating plate and the second insulating plate; the clamping assembly includes a first fastening member and a second fastening member, one of the first fastening member and the second fastening member is provided on the first insulating plate, and the other is provided on the second insulating plate;

[0009] In which, the second fastening part has a plug-in part that can be slidably arranged along the second direction, and the second direction and the first direction are perpendicular to each other; the first fastening part has a slot, and at least one end of the slot along the second direction passes through the first fastening part; the slot of the first fastening part and the plug-in part of the second fastening part are plug-fitted and connected, and the first direction is the thickness direction of the first insulating plate.

[0010] Furthermore, the second fastening member also includes a mounting seat, the mounting seat has at least one supporting portion, and at least one of the supporting portions is provided with a first sliding groove; the connector includes a plug-in portion, the first sliding groove and the plug-in portion of the connector are slidably matched, and the plug-in portion of the connector and the slot of the first fastening member are plug-fitted.

[0011] Furthermore, the second fastening component also includes a locking seat, the locking seat and the mounting seat are spaced apart along the second direction, and the space between the locking seat and the mounting seat is configured to accommodate the first fastening component; the locking seat is provided with a locking hole; the connector also includes a locking portion, the locking portion is connected to the plug-in portion, and when the first fastening component is located between the locking seat and the mounting seat and is plugged into and mated with the connector of the second fastening component, the locking portion is embedded in the locking hole.

[0012] Furthermore, the second insulating plate is provided with a second sliding groove, and part of the plug-in portion is slidably fitted in the second sliding groove.

[0013] Furthermore, the second fastening member is provided on the second insulating plate, and the first fastening member is provided on the first insulating plate, wherein the first sliding groove is connected to the second sliding groove.

[0014] Furthermore, the plug connector further includes a toggle portion, and one end of the plug connector that is away from the first insulating plate is connected to the toggle portion.

[0015] Further, the slot includes a card slot and a bayonet connected to the card slot, the plug-in portion includes a first plug-in section and a second plug-in section connected to the first plug-in section, the first plug-in section and the first slide groove are slidingly matched, the second plug-in section extends from the notch of the first slide groove and slides with the notch of the first slide groove; the first plug-in section and the card slot are plug-fitted, and the second plug-in section and the bayonet are plug-fitted, wherein, in the third direction, the width of the bayonet is smaller than the width of the card slot, the width of the second plug-in section is smaller than the width of the first plug-in section, at least part of the first plug-in section cannot pass through the bayonet, and the third direction is perpendicular to the second direction.

[0016] Furthermore, the first fastening component includes two connecting arms arranged opposite to each other, and the ends of the two connecting arms are each provided with a hook portion; the bayonet is formed between the two hook portions, and the card slot is formed between the two connecting arms.

[0017] The utility model also provides a top cover assembly, comprising a cover plate and the insulating member, wherein the cover plate and the first insulating plate are stacked, and the second insulating plate is located on a side of the first insulating plate away from the cover plate.

[0018] The utility model also provides a battery cell, comprising the top cover assembly.

[0019] The above-mentioned technical solution of the present invention has the following advantages over the prior art: the insulating part, top cover assembly and battery cell of the battery described in the present invention, the insulating part includes a first insulating plate and a second insulating plate, the second insulating plate can be folded to connect to the first insulating plate and can be unlocked and locked with each other through a first buckle and a second buckle, the first buckle is provided with a slot, and the second buckle includes a plug-in connector. Since the plug-in connector does not move along the thickness direction of the first insulating plate to achieve locking and unlocking with the slot, the contact area between the slot and the plug-in connector along the thickness direction of the first insulating plate can be larger, and thus the first buckle and the second buckle are not easy to detach and bounce off each other along the thickness direction of the first insulating plate; in addition, the plug-in connector translates in a direction parallel to the first insulating plate to achieve locking and unlocking with the slot, and the second buckle requires less operating space in the thickness direction of the first insulating plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0021] Figure 1 It is a three-dimensional diagram of the insulating member in the present utility model;

[0022] Figure 2This is a front view of the connector of the present invention when it is out of the slot;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0024] Figure 4 This is the main view of the connector of the present invention when it is inserted into the slot;

[0025] Figure 5 for Figure 4 A partial enlarged view of point E in the middle;

[0026] Figure 6 This is a bottom view of the connector of the present invention when it is inserted into the slot;

[0027] Figure 7 for Figure 4 Schematic diagram of the middle BB section;

[0028] Figure 8 It is a partial schematic diagram of the second insulating plate in the present utility model;

[0029] Figure 9 This is a cross-sectional view of the second insulating plate in the present invention;

[0030] Figure 10 It is a schematic diagram of the connector in the utility model;

[0031] Figure 11 This is a schematic diagram of the connection between the second insulating plate and the second fastening member in the present invention;

[0032] Figure 12 This is a cross-sectional view of the first insulating plate in the present invention;

[0033] Figure 13 It is a schematic diagram of the battery in the present utility model.

[0034] Explanation of the reference numerals in the specification: 1. first insulating plate; 2. second insulating plate; 21. second slide groove; 3. first fastening member; 31. slot; 311. card slot; 312. bayonet; 32. connecting arm; 33. hook; 4. second fastening member; 41. plug-in member; 411. plug-in portion; 4111. first plug-in section; 4112. second plug-in section; 412. locking portion; 413. toggle portion; 42. mounting seat; 421. supporting portion; 4211. first slide groove; 43. locking seat; 431. locking hole; 5. cover plate; 6. pole; 7. shell; 8. battery cell; 9. adapter; 10. insulating film; 11. bottom support plate; 12. upper plastic part; 13. sealing ring; 14. explosion-proof valve patch; 15. explosion-proof valve. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0036] See also Figures 1 to 12 As shown, the utility model provides an insulating member of a battery, comprising:

[0037] a first insulating plate 1;

[0038] A second insulating plate 2 has a first end along its length, and the first end of the second insulating plate 2 is reversibly connected to the first insulating plate;

[0039] A clamping assembly connecting the first insulating plate 1 and the second insulating plate 2; the clamping assembly includes a first fastening member 3 and a second fastening member 4, one of the first fastening member 3 and the second fastening member 4 being provided on the first insulating plate 1 and the other being provided on the second insulating plate 2;

[0040] Among them, the above-mentioned second fastening component 4 has a plug-in component 41 that can be slidably arranged along the second direction, and the above-mentioned second direction and the first direction are perpendicular to each other; the above-mentioned first fastening component 3 has a slot 31, and the above-mentioned slot 31 passes through the above-mentioned first fastening component 3 at least at one end along the above-mentioned second direction; the slot 31 of the above-mentioned first fastening component 3 and the plug-in component 41 of the second fastening component 4 are plug-fitted and connected, and the above-mentioned first direction is the thickness direction of the above-mentioned first insulating plate 1.

[0041] The second insulating plate 2 can be folded and connected to the first insulating plate 1, that is, the angle between the second insulating plate 2 and the first insulating plate 1 can be changed. When the angle between the second insulating plate 2 and the first insulating plate 1 becomes smaller, the insulating parts are closed, and when the angle between the second insulating plate 2 and the first insulating plate 1 becomes larger, the insulating parts are unfolded.

[0042] When the connector 41 is plugged into the slot 31, it restricts relative movement between the first insulating plate 1 and the second insulating plate 2 along the thickness direction of the first insulating plate 1. The locking process for the insulating member is as follows: first, the insulating members are closed, then the connector 41 of the second fastening member 4 is translated. After translation, the connector 41 of the second fastening member 4 engages with the slot 31 of the first fastening member 3 after a certain distance, thus locking the connector. At this point, the first fastening member 3 and the second fastening member 4 cannot separate or spring apart along the thickness direction of the first insulating plate 1. The application of the insulating member will be explained below in conjunction with other structural features of the battery cell.

[0043] The plug-in part 41 of the above-mentioned second fastening part 4 does not move along the thickness direction of the first insulating plate 1 to achieve locking and unlocking with the slot of the first fastening part 3. Therefore, the contact area between the first fastening part 3 and the second fastening part 4 along the thickness direction of the first insulating plate 1 can be larger. In this way, the first fastening part 3 and the second fastening part 4 are not easy to separate from each other along the thickness direction of the first insulating plate 1; on the other hand, the plug-in part 41 of the second fastening part 4 is translated in a direction parallel to the first insulating plate 1 to achieve locking and unlocking with the first fastening part 3, and the second fastening part 4 requires less operating space in the thickness direction of the first insulating plate 1.

[0044] It should be noted that, in order to prevent the portion of the connector 41 inserted into the slot 31 from being affected by the depth of the slot 31 , both ends of the slot 31 along the second direction may be designed to pass through the first fastening member 3 .

[0045] In this embodiment, see Figure 8-11 The above-mentioned second fastening component 4 also includes a mounting seat 42, and the above-mentioned mounting seat 42 has at least one supporting portion 421, and at least one of the above-mentioned supporting portions 421 is provided with a first sliding groove 4211; the above-mentioned connector 41 includes a plug-in portion 411, and the above-mentioned first sliding groove 4211 and the plug-in portion of the above-mentioned connector 41 are slidably matched, and the plug-in portion 411 of the above-mentioned connector 41 is plug-fitted with the slot 31 of the above-mentioned first fastening component 3.

[0046] In this embodiment, the connector 41 is installed on the support portion 421 by means of a sliding fit between the connector portion 411 and the first slide groove 4211, wherein the connector 41 is guided to move toward the direction approaching the first fastening member 3 or toward the direction away from the first fastening member 3 through the sliding fit between the connector portion 411 and the first slide groove 4211, so that the connector portion 411 of the connector 41 and the slot 31 of the first fastening member 3 can be plugged in more quickly and accurately.

[0047] It should be noted that, in order to make the plug-in portion 411 of the plug-in connector 41 slide more smoothly, a plurality of support portions 421 may be designed, and the plurality of support portions 421 are spaced apart in the sliding direction.

[0048] In this embodiment, the second fastening component 4 also includes a locking seat 43, and the locking seat 43 and the mounting seat 42 are spaced apart along the second direction, and the space between the locking seat 43 and the mounting seat 42 is configured to accommodate the first fastening component 3; the locking seat 43 is provided with a locking hole 431; the plug-in component 41 also includes a locking portion 412, and the locking portion 412 is connected to the plug-in portion 411. When the first fastening component 3 is located between the locking seat 43 and the mounting seat 42 and is plugged into the plug-in component 41 of the second fastening component 4, the locking portion 412 is embedded in the locking hole 431.

[0049] Since the plug-in portion 411 of the connector 41 and the slot 31 are slidingly matched, in order to prevent the plug-in portion 411 from sliding out of the slot 31 by itself, thereby causing the second fastening member 4 and the first fastening member 3 to separate by themselves, a locking seat 43 and a locking portion 412 that cooperates with the locking seat 43 are designed. When the plug-in portion 411 of the connector 41 passes through the slot 31, locking is achieved by allowing the locking portion 412 of the connector 41 to be embedded in the locking hole 431 of the locking seat 43.

[0050] Specifically, the locking hole 431 and the locking portion 412 of the connector 41 are locked by interference fit. In order to facilitate the insertion of the locking portion 412 into the locking hole 431 , a guiding slope is provided on the side of the locking hole 431 close to the mounting seat 42 .

[0051] In this embodiment, the second insulating plate 2 is provided with a second sliding groove 21 , and part of the plug-in portion 411 is slidably fitted in the second sliding groove 21 .

[0052] In this embodiment, the above-mentioned locking seat 43 and / or mounting seat 42 are integrally formed with the second insulating plate 2, and the locking seat 43 and / or mounting seat 42 are both arranged on the side of the second insulating plate 2 facing the first insulating plate 1. In order to facilitate the sliding of the driving connector 41, the second insulating plate 2 is designed to be provided with a second slide groove 21, so that the plug-in portion 411 of the connector 41 can be driven to move by the part of the driving plug-in portion 411 that slides with the second slide groove 21, thereby further making the plug-in portion 411 of the connector 41 and the slot 31 quickly and accurately plugged in.

[0053] In this embodiment, the second fastening member 4 is provided on the second insulating plate 2 , and the first fastening member 3 is provided on the first insulating plate 1 , wherein the first sliding groove 4211 is connected to the second sliding groove 21 .

[0054] Specifically, see Figure 8 and Figure 9 As shown, the support portion 421 is a U-shaped structure, the slot width of the first slide groove 4211 is smaller than the slot bottom width of the first slide groove 4211, and the slot width of the first slide groove 4211 is equal to the slot width of the second slide groove 21. In this way, the plug-in portion 411 of the connector 41 is inserted into the first slide groove 4211 from the slot of the second slide groove 21 and the first slide groove 4211, so that the plug-in portion 411 of the connector 41 cannot be easily detached from the first slide groove 4211, while the plug-in portion 411 of the connector 41 and the first slide groove 4211 are slidably matched.

[0055] In this embodiment, in order to facilitate the movement of the plug connector 41 , the plug connector 41 further includes a toggle portion 413 , and one end of the plug connector 411 away from the first insulating plate 1 is connected to the toggle portion 413 .

[0056] When the first insulating plate 1 and the second insulating plate 2 are closed together, the plug-in portion 411 can be driven to move by driving the toggle portion 413 , thereby conveniently controlling the plug-in and disengagement of the plug-in component 41 and the slot 31 .

[0057] Further, see Figure 9 The second insulating plate 2 is designed to be recessed on one side away from the first insulating plate 1 to form a third slide groove. The toggle portion 413 is slidably arranged in the third slide groove. The toggle portion 413 is embedded in the third slide groove, reducing the space occupied by the second fastener 4 in the shell. The toggle portion 413 and the third slide groove are slidably matched to guide the sliding of the toggle portion 413.

[0058] Furthermore, Figure 7 and Figure 8 As shown, the second insulating plate 2 is provided with an avoidance hole corresponding to the space between the locking seat 43 and the upper mounting seat 42, so that when the first fastening member 3 is inserted between the locking seat 43 and the upper mounting seat 42, part of the first fastening member 3 can be accommodated in the avoidance hole, thereby reducing the space occupied by the snap assembly in the shell in the thickness direction.

[0059] In this embodiment, see Figure 7 and Figure 12 The above-mentioned slot 31 includes a card slot 311 and a bayonet 312 connected to the above-mentioned card slot 311, and the above-mentioned plug-in portion 411 includes a first plug-in section 4111 and a second plug-in section 4112 connected to the above-mentioned first plug-in section 4111, the above-mentioned first plug-in section 4111 and the above-mentioned first slide groove 4211 are slidably matched, and the above-mentioned second plug-in section 4112 extends from the notch of the above-mentioned first slide groove 4211 and slidably matched with the notch of the above-mentioned first slide groove 4211; the above-mentioned first plug-in section 4111 and the above-mentioned card slot 311 are plug-fitted, and the above-mentioned second plug-in section 4112 and the bayonet 312 are plug-fitted, wherein, in the third direction, the width of the bayonet 312 is smaller than the width of the above-mentioned card slot 311, the width of the above-mentioned second plug-in section 4112 is smaller than the width of the above-mentioned first plug-in section 4111, at least part of the above-mentioned first plug-in section 4111 cannot pass through the bayonet 312, and the above-mentioned third direction is perpendicular to the second direction.

[0060] Since the first plug-in section 4111 of the plug-in portion 411 and the card slot 311 are slidably fitted, and the second plug-in section 4112 of the plug-in portion 411 and the card slot 312 are slidably fitted, the width dimension of the first plug-in section 4111 can be designed to be much larger than the width dimension of the card slot 312. In this way, even if there is a processing error, it can be ensured that the first fastening member 3 and the second fastening member 4 are not easily separated from each other along the thickness direction of the first insulating plate 1.

[0061] Specifically in this embodiment, see Figure 10The first plug-in section 4111 is a cylinder, and the second plug-in section 4112 is a flat plate. The diameter of the cylinder is much larger than the thickness of the flat plate.

[0062] Specifically in this embodiment, see Figure 12 The first fastening member 3 and the first insulating plate 1 are integrally formed. The first fastening member 3 includes two connecting arms 32 arranged opposite to each other, and the ends of the two connecting arms 32 are both provided with hooks 33; the above-mentioned bayonet 312 is formed between the two above-mentioned hooks 33, and the above-mentioned slot 311 is formed between the two above-mentioned connecting arms 32.

[0063] The following introduces a top cover assembly, including a cover plate and the above-mentioned insulating member. The cover plate and the above-mentioned first insulating plate 1 are stacked, and the above-mentioned second insulating plate 2 is located on a side of the above-mentioned first insulating plate 1 away from the above-mentioned cover plate.

[0064] The cover plate and the first insulating plate 1 are aligned in length, width, and thickness. Both the cover plate and the first insulating plate 1 are provided with a terminal post hole extending through their thickness. The terminal posts are fixed relative to the cover plate and pass through the terminal post holes in the cover plate and the first insulating plate 1. The application of the top cover assembly will be described below in conjunction with other structures of the battery cell.

[0065] See also Figure 13 FIG. 1 shows an embodiment of a battery cell of the present invention.

[0066] The battery cell includes the above-mentioned top cover assembly.

[0067] In addition to the above-mentioned top cover assembly, the battery cell also includes a shell 7, a battery cell 8 and an electrolyte. The battery cell 8 and the electrolyte are arranged in the shell 7. The pole ear led out of the battery cell 8 is electrically connected to the pole 6 on the cover plate 5. The above-mentioned insulating part is a lower plastic part arranged between the battery cell 8 and the cover plate 5. The outer side of the battery cell 8 is covered with an insulating film 10. A bottom support plate 11 is arranged between the bottom of the battery cell 8 and the shell 7. An upper plastic part 12 and a sealing ring 13 are arranged between the above-mentioned pole 6 and the pole hole of the cover plate 5. The above-mentioned cover plate 5 is also provided with an explosion-proof valve patch 14 and an explosion-proof valve 15.

[0068] During the connection process of the tab of the battery cell 8 and the pole 6 of the cover plate 5, a certain angle space is formed between the second insulating plate 2 and the first insulating plate 1 (to facilitate the connection of the tab and the pole), the first fastener 3 and the second fastener 4 are not in contact, and the tab bypasses the second insulating plate 2 and is connected to the pole through the adapter 9. After the pole and the tab are connected, the second insulating plate 2 is first brought close to the first insulating plate 1 until the angle between the two is small or parallel to each other, and then the plug-in part 41 of the second fastener 4 is moved. The plug-in part 41 of the second fastener 4 moves horizontally and, after rotating a certain distance, engages with the slot 31 of the first fastener 3 and is in a locked state. At this time, the first fastener 3 and the second fastener 4 cannot be separated from each other along the thickness direction of the first insulating plate 1. The second insulating plate 2 fixes and supports the tab of the battery cell to prevent the weld from being pulled and broken, and also prevents welding slag from falling into the battery cell, thereby ensuring the safety of the battery cell.

[0069] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery insulating member, characterized in that: include: a first insulating plate (1); A second insulating plate (2) having a first end along its length direction, the first end of the second insulating plate (2) being connected to the first insulating plate in a flippable manner; A snap-fit ​​assembly connects the first insulating plate (1) and the second insulating plate (2); the snap-fit ​​assembly comprises a first fastening member (3) and a second fastening member (4); one of the first fastening member (3) and the second fastening member (4) is arranged on the first insulating plate (1), and the other is arranged on the second insulating plate (2); The second fastening member (4) has a plug-in connector (41) that can be slidably arranged along a second direction, and the second direction and the first direction are perpendicular to each other; the first fastening member (3) has a slot (31), and at least one end of the slot (31) along the second direction passes through the first fastening member (3); the slot (31) of the first fastening member (3) and the plug-in connector (41) of the second fastening member (4) are plug-fitted and connected, and the first direction is the thickness direction of the first insulating plate (1).

2. The insulating member according to claim 1, wherein The second fastening member (4) further comprises a mounting seat (42), the mounting seat (42) having at least one supporting portion (421), at least one of the supporting portions (421) being provided with a first sliding groove (4211); the plug-in member (41) comprises a plug-in portion (411), the first sliding groove (4211) and the plug-in portion of the plug-in member (41) are slidably matched, and the plug-in portion (411) of the plug-in member (41) and the slot (31) of the first fastening member (3) are plug-fitted.

3. The insulating member according to claim 2, wherein: The second fastening member (4) further comprises a locking seat (43), wherein the locking seat (43) and the mounting seat (42) are spaced apart along the second direction, and the space between the locking seat (43) and the mounting seat (42) is configured to accommodate the first fastening member (3); the locking seat (43) is provided with a locking hole (431); the plug-in member (41) further comprises a locking portion (412), wherein the locking portion (412) is connected to the plug-in member (411), and when the first fastening member (3) is located between the locking seat (43) and the mounting seat (42) and is plugged into and matched with the plug-in member (41) of the second fastening member (4), the locking portion (412) is embedded in the locking hole (431).

4. The insulating member according to claim 2 or 3, characterized in that: The second insulating plate (2) is provided with a second sliding groove (21), and part of the plug-in portion (411) is slidably fitted with the second sliding groove (21).

5. The insulating member according to claim 4, wherein: The second fastening member (4) is provided on the second insulating plate (2), and the first fastening member (3) is provided on the first insulating plate (1), wherein the first sliding groove (4211) and the second sliding groove (21) are in communication.

6. The insulating member according to claim 5, wherein: The plug connector (41) further comprises a toggle portion (413), and one end of the plug connector (411) disposed away from the first insulating plate (1) is connected to the toggle portion (413).

7. The insulating member according to claim 2, wherein: The slot (31) includes a card slot (311) and a card opening (312) connected to the card slot (311); the plug-in portion (411) includes a first plug-in section (4111) and a second plug-in section (4112) connected to the first plug-in section (4111); the first plug-in section (4111) and the first slide groove (4211) are slidably engaged; the second plug-in section (4112) extends from the notch of the first slide groove (4211) and is slidably engaged with the notch of the first slide groove (4211); The first plug-in section (4111) and the card slot (311) are plug-fitted, and the second plug-in section (4112) and the bayonet (312) are plug-fitted, wherein, in a third direction, the width of the bayonet (312) is smaller than the width of the card slot (311), the width of the second plug-in section (4112) is smaller than the width of the first plug-in section (4111), at least part of the first plug-in section (4111) cannot pass through the bayonet (312), and the third direction is perpendicular to the second direction.

8. The insulating member according to claim 7, wherein: The first fastening member (3) comprises two connecting arms (32) arranged opposite to each other, and the ends of the two connecting arms (32) are both provided with hooks (33); the bayonet (312) is formed between the two hooks (33), and the card slot (311) is formed between the two connecting arms (32).

9. A top cover assembly, comprising a cover plate (5) and an insulating member according to any one of claims 1 to 8, wherein the cover plate (5) and the first insulating plate (1) are stacked, and the second insulating plate (2) is located on a side of the first insulating plate (1) away from the cover plate (5).

10. A battery cell, characterized in that: Includes the top cover assembly according to claim 9.

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