Adapter piece, cover plate assembly and battery

Abstract

The utility model provides an adapter piece which comprises a flexible connecting part, a tab connecting part and a bus piece connecting part, the tab connecting part is used for connecting a pole, and the bus piece connecting part is used for connecting a bus piece; the two ends of the flexible connection part are respectively connected with the tab connection part and the confluence piece connection part, the switching piece is formed by stacking and laminating single-layer metal pieces, the tab connection part and the confluence piece connection part are compacted, and the flexible connection part is not laminated. The adapter sheet provided by the utility model solves the problems that the traditional bending stress is difficult to release and the internal space is wasted, meanwhile, the flexibility between the bus sheet and the pole is improved, and a solid guarantee is provided for long-term stable operation of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery technical field, concretely relates to a switching piece, cover plate subassembly and battery. BACKGROUND

[0002] The switching piece is a key component for connecting the battery unit (cell) and the battery management system (BMS) or other electrical equipment, which ensures current transmission and guarantees the safety and performance of the battery pack. The existing switching piece represented by four switching pieces connects the cell and the pole, which usually needs to be bent by 180°. When the battery capacity density is improved, the switching piece thickness will be increased to improve the carrying capacity of the switching piece. At this time, the switching piece bent by 180° will increase the thickness space of the switching piece. At the same time, there is a gap between the upper and lower two layers of the switching piece after bending, which wastes the internal space of the battery, resulting in the influence of the battery capacity density. Secondly, the stress at the bending part of the switching piece bent by 180° cannot be released, which may affect the service life of the switching piece and thus affect the use of the battery. Although there are many researches on the switching piece at present, there is still a lack of a switching piece that can optimize the structure of the switching piece while avoiding the influence of the bending part and improve the utilization rate of the internal space of the battery. SUMMARY

[0003] In view of the problems existing in the prior art, the utility model provides a switching piece for the internal battery, which solves the problems of difficult release of traditional bending stress and waste of internal space, and improves the flexibility between the bus bar and the pole, providing a solid guarantee for the long-term stable operation of the battery.

[0004] In the first aspect, the utility model provides a switching piece, which comprises a soft connection part, a pole lug connection part and a bus bar connection part.

[0005] The pole lug connection part is used for connecting the pole, and the bus bar connection part is used for connecting the bus bar. The two ends of the soft connection part are connected with the pole lug connection part and the bus bar connection part respectively. The switching piece is stacked and laminated by a single layer of metal sheet. The pole lug connection part and the bus bar connection part are compacted, and the soft connection part is not laminated.

[0006] As a further scheme, the bus bar connection part comprises a first folding part and a second folding part. The first folding part is used for connecting the soft connection part and the second folding part. The second folding part is located at the end of the bus bar connection part. The second folding part is folded along the boundary line between the first folding part and the second folding part, and clamps the bus bar.

[0007] As a further scheme, the second folding part and the pole lug connection part are diagonally distributed.

[0008] As a further scheme, the bending R angle of the switching piece is selected from 0.1mm to 5mm.

[0009] As a further solution, the soft connection portion can be bent at an angle selected from 0°-180°.

[0010] As a further solution, the ratio of the width of the first folding portion to the second folding portion is selected from 0.1-0.2.

[0011] As a further solution, the length of the second folding portion matches the busbar, and the length of the tab connection portion matches the pole.

[0012] As a further solution, the adapter tab includes a positive adapter tab and a negative adapter tab.

[0013] As a further solution, the adapter tab is laminated by stacking a single layer of metal sheet, the thickness of the single layer of metal sheet is 0.1mm-1mm, and the thickness of the adapter tab is selected from 0.2mm-5mm.

[0014] As a further solution, the adapter tab is made of any one of aluminum, copper, nickel-plated copper, nickel-plated aluminum, and nickel-copper alloy.

[0015] In a second aspect, the utility model also proposes a cover plate assembly, contains above-mentioned adapter tab.

[0016] As a further solution, the cover plate assembly further includes a busbar and a pole.

[0017] The busbar is located between the adapter tab and the battery roll core, and is used to collect and transmit the current of the battery roll core to the adapter tab, the pole is located above the adapter tab, and is used to introduce or output the current, the busbar is fixedly connected with the busbar connection portion of the adapter tab, and the pole is fixedly connected with the adapter tab.

[0018] As a further solution, the busbar is preferably rectangular in shape.

[0019] As a further solution, the cover plate assembly further includes a cover plate, and the cover plate is provided with at least one cover plate pole insertion port.

[0020] As a further solution, the pole further includes an insertion portion and a connection portion connected along the axial direction of the pole, the connection portion is fixedly connected with the tab connection portion of the adapter tab, and the insertion portion is inserted into the cover plate through the cover plate pole insertion port.

[0021] As a further solution, the cover plate assembly further includes a lower plastic, the lower plastic is located between the pole connection portion and the cover plate, and the lower plastic is fixedly connected to the cover plate.

[0022] As a further solution, the lower plastic is provided with a lower plastic pole insertion port coaxial with the cover plate pole insertion port, and the insertion portion is inserted in sequence through the lower plastic pole insertion port and the cover plate pole insertion port.

[0023] As a further scheme, the pole post further comprises a pole post sealing ring, an upper plastic, and a pole post pressing plate, the pole post sealing ring is located between the cover plate pole post insertion interface and the lower plastic pole post insertion interface, and is used for improving the sealing performance of the pole post; the upper plastic is located above the cover plate pole post insertion interface, and is used for insulating the pole post; and the pole post pressing plate is matched with the upper plastic, and is embedded in the upper plastic.

[0024] As a further scheme, the insertion part is sequentially provided with a first positioning groove, a second positioning groove, a third positioning groove, and a fourth positioning groove in sequence along the axial direction of the insertion part from the connecting part upwards.

[0025] As a further scheme, the first positioning groove is matched with the lower plastic pole post insertion interface, the second positioning groove is matched with the pole post sealing ring, the third positioning groove is matched with the cover plate pole post insertion interface, and the fourth positioning groove is matched with the pole post pressing plate.

[0026] As a further scheme, the lower plastic pole post insertion interface is further provided with a protruding limiting boss on the contact surface of the lower plastic pole post insertion interface and the pole post sealing ring.

[0027] As a further scheme, the cover plate is further provided with an upper plastic positioning groove which is coaxial with the cover plate pole post insertion interface and is matched with the upper plastic of the positive electrode.

[0028] As a further scheme, the cover plate assembly further comprises an anti-explosion sheet and an anti-explosion patch, the lower plastic is further provided with an anti-explosion net, the cover plate is further provided with an anti-explosion opening matched with the anti-explosion net, the anti-explosion sheet is arranged between the anti-explosion net and the anti-explosion opening, and is fixedly connected with the anti-explosion net and the anti-explosion opening, the anti-explosion patch is attached to the anti-explosion opening, and the anti-explosion sheet is consistent in shape with the anti-explosion net, but has an area greater than that of the anti-explosion net.

[0029] As a further scheme, the cover plate assembly further comprises a sealing nail.

[0030] The lower plastic and the cover plate are further provided with coaxial lower plastic sealing openings and cover plate sealing openings, and the sealing nail is embedded into the cover plate sealing openings and the lower plastic sealing openings in sequence, and is fixedly connected with the cover plate sealing openings and the lower plastic sealing openings.

[0031] Compared with the prior art, the utility model has at least the following beneficial effects:

[0032] 1. By introducing a soft connection part between the lug connection part and the busbar connection part, the problem of stress release of the adapter piece under bending is effectively solved, and the flexibility between the busbar and the pole is greatly improved. In addition, the ingenious design of the soft connection part also makes the battery better adapt to various mechanical deformations during installation and use. Whether in the initial installation of the equipment or in daily use, the battery can effectively cope with the mechanical stress caused by vibration or impact, thereby greatly reducing the risk of damage caused by these physical impacts, providing a solid guarantee for the long-term stable operation of the battery.

[0033] 2. By setting the second folding part for clamping the busbar at the end of the busbar connection part, the idle space generated during bending is fully utilized, and the adapter piece is used to complete the preliminary fixation of the busbar. Not only the idle space generated during bending is fully utilized, but also the preliminary fixation of the busbar is realized through the adapter piece. The setting of the second folding part optimizes the space utilization efficiency and lays a solid foundation for the subsequent welding of the busbar. This layout ensures that the relative position of each component is more stable before welding, thereby improving the reliability and welding quality of the overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which form a part of this description, illustrate the present utility model and serve to explain the principles of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation on the present utility model.

[0035] In the drawings:

[0036] Figure 1 It is a planar unfolded view of the adapter piece. The dashed line part is an auxiliary line for clearly showing the partition of different areas;

[0037] Figure 2 It is an exploded view of the cover plate assembly;

[0038] Figure 3 It is a schematic exploded view of the cover plate, adapter piece and busbar;

[0039] Figure 4 It is a pole structure diagram.

[0040] 1 - busbar; 2 - adapter piece; 21 - soft connecting part; 22 - tab connecting part; 23 - busbar connecting part; 231 - first folding part; 232 - second folding part; 3 - cover plate; 31 - cover plate pole insertion interface; 32 - upper plastic positioning groove; 4 - lower plastic; 41 - lower plastic pole insertion interface; 5 - pole; 51 - insertion part; 511 - first positioning groove; 512 - second positioning groove; 513 - third positioning groove; 514 - fourth positioning groove; 52 - connecting part; 53 - pole sealing ring; 54 - upper plastic; 55 - pole pressing plate; 61 - explosion-proof sheet; 62 - explosion-proof patch; 63 - explosion-proof net; 64 - explosion-proof port; 71 - sealing nail; 72 - cover plate sealing opening; 73 - lower plastic sealing opening. DETAILED DESCRIPTION

[0041] For the convenience of understanding, the utility model will be described more fully below, and the embodiments of the utility model are given, but the scope of the utility model is not limited by this.

[0042] In a first aspect, the utility model provides an adapter piece 2 ( Figure 1 ), including soft connecting part 21, tab connecting part 22, busbar connecting part 23;Wherein, tab connecting part 22 is used to connect pole 5, busbar connecting part 23 is used to connect busbar 1;Soft connecting part 21 both ends are connected with tab connecting part 22 and busbar connecting part 23 respectively, the busbar connecting part 23 includes first folding part 231 and second folding part 232, the first folding part 231 is used to connect soft connecting part 21 and second folding part 232, and the second folding part 232 is located at the end of busbar connecting part 23, and the second folding part 232 is folded along the boundary of first folding part 231 and second folding part 232, clamps busbar 1, and the adapter piece 2 is stacked and laminated by single-layer metal sheet, tab connecting part 22, busbar connecting part 23 are compacted, and soft connecting part 21 is not laminated.

[0043] To solve the problem that the stress at the bending part of the traditional adapter sheet 2 cannot be released, and the space of the battery is wasted due to the gap between the adapter sheets 2 after bending, we provide a new adapter sheet. On the one hand, by setting a soft connection part 21 that is not laminated between the tab connecting part 22 and the bus bar connecting part 23, we not only avoid the problem that the stress at the bending part is difficult to release under the bending condition, but also the design of the soft connection part 21 that is not laminated enables the battery to better adapt to various mechanical deformations during installation and use, thereby reducing the tearing between the pole 5, the bus bar 1 and the adapter sheet 2 caused by vibration or impact, and improving the stability of the battery. Secondly, in order to make full use of the space generated due to bending, we set a compact first folding part 231 and a second folding part 232 at the bus bar connecting part 23. The second folding part 232 at the end is folded inward to clamp the bus bar 1, which not only makes full use of the idle space generated during bending, but also uses the adapter sheet 2 to complete the preliminary fixation of the bus bar 1, thereby laying a good foundation for the subsequent welding of the bus bar. In addition, the compact tab connecting part 22 and bus bar connecting part 23 not only fix the soft connection part 21, but also increase the conductivity and current carrying capacity of the adapter sheet 2, reducing resistance and energy loss.

[0044] As a further solution, the second folding part 232 is diagonally distributed with the tab connecting part 22.

[0045] As a further solution, the bending R angle of the adapter sheet 2 is selected from 0.1mm-5mm, which helps to avoid damage to the battery cell and other internal components caused by the bending R angle of the adapter sheet 2, and improves the stability and safety of the battery.

[0046] As a further solution, the bending angle of the soft connection part 21 is selected from 0°-180°.

[0047] As a further solution, the width ratio of the first folding part 231 to the second folding part 232 is selected from 0.1-0.2.

[0048] As a further solution, the length of the second folding part 232 cooperates with the bus bar 1, and the length of the tab connecting part 22 cooperates with the pole 5.

[0049] As a further solution, the adapter sheet 2 includes a positive adapter sheet and a negative adapter sheet.

[0050] As a further solution, the adapter sheet 2 is stacked and laminated by a single layer of metal sheet, the thickness of the single layer of metal sheet is 0.1mm-1mm, and the thickness of the adapter sheet 1 is selected from 0.2mm-5mm.

[0051] As a further solution, the material of the adapter sheet 12 is selected from any one of aluminum, copper, nickel-plated copper, nickel-plated copper, nickel-plated copper, and nickel-copper alloy.

[0052] In a second aspect, the utility model discloses a cover plate assembly, containing the adapter piece 2 as above, like Figure 3 .

[0053] As a further scheme, the cover plate assembly further includes the bus bar 1, the pole 5, like Figure 2 .

[0054] Wherein, the bus bar 1 is located between the adapter piece 2 and the battery roll core, for the current of the battery roll core is gathered and is delivered to the adapter piece 2, the pole 5 is located above the adapter piece 2, for the introduction or output current, the bus bar 1 and the bus bar connection of adapter piece 2 23 fixed connection, the pole 5 and the adapter piece 2 fixed connection.

[0055] As a further scheme, the bus bar shape is preferably rectangular, and the rectangular bus bar 1 helps to cooperate the first folding part 231 and the second folding part 232 on the adapter piece 2, realizes the clamping of the bus bar 1 on the adapter piece 2, thereby making full use of the space in the battery and laying the foundation for subsequent welding.

[0056] As a further scheme, the cover plate assembly further includes the cover plate 3, and the cover plate 3 is provided with at least one cover plate pole insertion port 31.

[0057] As a further scheme, the pole 5 further includes the insertion part 51 and the connecting part 52 connected along the axis of itself, the connecting part 52 is fixedly connected with the tab connecting part 22 of the adapter piece 2, and the insertion part 51 is inserted on the cover plate 3 through the cover plate pole insertion port 31.

[0058] As a further scheme, the cover plate assembly further includes the lower plastic 4, and the lower plastic 4 is located between the connecting part 52 of the pole 5 and the cover plate 3, and the lower plastic 4 is fixedly connected on the cover plate 3.

[0059] As a further scheme, the lower plastic 4 is provided with a lower plastic pole insertion port 41 coaxial with the cover plate pole insertion port 31, and the insertion part 51 is inserted through the lower plastic pole insertion port 41 and the cover plate pole insertion port 31 in sequence.

[0060] As a further scheme, the pole 5 further includes a pole sealing ring 53, an upper plastic 54 and a pole pressing plate 55, the pole sealing ring 53 is located between the cover plate pole insertion port 31 and the lower plastic pole insertion port, for improving the sealing property of the pole 5, the upper plastic 54 is located above the cover plate pole insertion port 31, for insulating the pole 5, and the pole pressing plate 55 is matched with the upper plastic 54, and the pole pressing plate 55 is embedded in the upper plastic 54.

[0061] As a further scheme, as Figure 4As shown, the plug-in part 51 is sequentially provided with a first positioning groove 511, a second positioning groove 512, a third positioning groove 513 and a fourth positioning groove 514 along the self axial direction from the connecting part 52 upwards.

[0062] As a further scheme, the first positioning groove 511 is matched with the lower plastic pole plug-in interface 41, the second positioning groove 512 is matched with the pole sealing ring 53, the third positioning groove 513 is matched with the cover plate pole plug-in interface 31, and the fourth positioning groove 514 is matched with the pole pressing plate 55.

[0063] As a further scheme, the lower plastic pole plug-in interface 41 is further provided with a protruding limiting boss on the contact surface of the pole sealing ring 53.

[0064] As a further scheme, the cover plate 3 is further provided with an upper plastic positioning groove 32 coaxial with the cover plate pole plug-in interface 31 and matched with the positive upper plastic.

[0065] As a further scheme, the cover plate assembly further comprises an anti-explosion sheet 61 and an anti-explosion patch 62, the lower plastic is further provided with an anti-explosion net 63, the cover plate 3 is further provided with an anti-explosion opening 64 matched with the anti-explosion net 63, the anti-explosion sheet 61 is arranged between the anti-explosion net 63 and the anti-explosion opening 64 and fixedly connected with the anti-explosion net 63 and the anti-explosion opening 64, the anti-explosion patch 62 is pasted on the anti-explosion opening 64, and the anti-explosion sheet 61 is consistent in shape with the anti-explosion net 63 but larger in area than the anti-explosion net 63.

[0066] As a further scheme, the cover plate assembly further comprises a sealing nail 71.

[0067] The lower plastic 4 and the cover plate 3 are further provided with coaxial lower plastic sealing openings 73 and cover plate sealing openings 72, and the sealing nail 71 is sequentially inserted into the cover plate sealing openings 72 and the lower plastic sealing openings 73 and fixedly connected with the cover plate sealing openings 72 and the lower plastic sealing openings 73.

[0068] As a further scheme, the pole 5 is made of aluminum, copper, copper-aluminum alloy,

[0069] As a further scheme, the pole sealing ring 53 is made of rubber.

[0070] As a further scheme, the rubber is selected from any one of natural rubber, nitrile rubber, chloroprene rubber, silicone rubber, ethylene-propylene rubber, butyl rubber, fluororubber, polyurethane rubber, hydrogenated nitrile rubber, Teflon rubber, ethylene-propylene-diene rubber and fluororubber.

[0071] As a further solution, the lower plastic 4 is selected from any one of polytetrafluoroethylene, polyvinylidene fluoride, polypropylene, polyvinyl chloride, polyethylene, polyether ether ketone, polyphenylene sulfide, fluororubber, polyether sulfone, ethylene-tetrafluoroethylene copolymer.

[0072] As a further solution, the cover plate 3 is made of any one of aluminum, steel, copper, zinc.

[0073] As a further solution, the upper plastic 54 is made of any one of polytetrafluoroethylene, polyvinylidene fluoride, polypropylene, polyvinyl chloride, polyethylene, polyether ether ketone, polyphenylene sulfide, fluororubber, polyether sulfone, ethylene-tetrafluoroethylene copolymer.

[0074] As a further solution, the pole plate 55 is made of any one of aluminum, copper, zinc.

[0075] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0076] Embodiment 1

[0077] The negative pole is made of copper-aluminum composite material, the positive pole is made of metal aluminum, the pole sealing ring 53 is made of fluororubber, the lower plastic 4 is made of PP, the cover plate 3 is made of metal aluminum, the upper plastic 54 is made of PPS, and the pole plate 55 is made of metal aluminum.

[0078] The positive and negative poles are assembled by riveting and welding process, and the sealing property depends on the compression deformation sealing of the pole sealing ring 53. The specific implementation steps are as follows:

[0079] a) The explosion-proof opening 64 on the cover plate 3 is first laser-welded with the explosion-proof sheet 61, and the explosion-proof sheet 62 is attached; b) The lower plastic 4 is positioned and installed through the lower plastic pole insertion interface and the hole position of the cover plate 3; c) The pole insertion part 51 is sleeved with the pole sealing ring 53, and sequentially passes through the lower plastic pole insertion interface 41, the cover plate pole insertion interface 31, the upper plastic 54, and the pressing block 55. The sealing ring 53 is deformed by applying external force to the compression connection part 52 and the pole pressing block 55, so as to be pressed and fixed to the pole pressing plate 55 through the fourth positioning groove 514, and the fourth positioning groove 514 and the pole pressing plate 55 are spliced and welded to reinforce the strength; d) The sealing nail 71 is pressed into the cover plate sealing opening 72 after the product is injected, and laser welding is performed. The assembly of the entire cover plate is realized.

[0080] Any technical features in the above-described embodiments can be combined, and for the sake of brevity, not all possible combinations are described, however, it is understood that the scope of the present application encompasses all possible combinations. Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and deformations to the above-described embodiments within the scope of the present application. In addition, those skilled in the art can combine and combine the features of different embodiments or examples described in the specification and different embodiments or examples.

Claims

1. A tab, characterized in that The soft connection part (21), the tab connection part (22), and the busbar connection part (23) are connected to each other. The tab connection part (22) is used to connect the pole (5), and the busbar connection part (23) is used to connect the busbar (1). The adapter sheet (2) is stacked and laminated by single-layer metal sheets, the tab connection part (22) and the busbar connection part (23) are compacted, and the soft connection part (21) is not laminated.

2. The adapter plate of claim 1, wherein, The busbar connection part (23) includes a first folding part (231) and a second folding part (232), the first folding part (231) is used to connect the soft connection part (21) and the second folding part (232), the second folding part (232) is located at the end of the busbar connection part (23), and the second folding part (232) is folded along the boundary between the first folding part (231) and the second folding part (232) to clamp the busbar (1). The busbar connection part (23) and the tab connection part (22) are diagonally distributed.

3. The adapter plate of claim 2, wherein, The bending R angle of the adapter sheet (2) is selected from 0.1 mm to 5 mm. The bendable angle of the soft connection part (21) is selected from 0°-180°. The width ratio of the first folding part (231) to the second folding part (232) is selected from 0.1-0.

2. The length of the second folding part (232) is matched with the busbar (1), and the length of the tab connection part (22) is matched with the pole (5). The thickness of the single-layer metal sheet is 0.1 mm-1 mm, and the thickness of the adapter sheet (2) is selected from 0.2 mm-5 mm.

4. The adapter plate of claim 1, wherein, The adapter sheet includes a positive adapter sheet and a negative adapter sheet.

5. A cover plate assembly characterized by, The adapter sheet includes the adapter sheet of any one of claims 1-4.

6. The cover plate assembly of claim 5, wherein, The adapter sheet further includes a busbar (1) and a pole (5). The busbar (1) is located between the adapter sheet (2) and the battery roll core, and is used to collect and transmit the current of the battery roll core to the adapter sheet (2). The pole (5) is located above the adapter sheet (2), and is used to introduce or output the current. The busbar (1) includes a positive busbar and a negative busbar. The pole (5) includes a positive pole and a negative pole. The busbar (1) has a rectangular shape.

7. The cover plate assembly of claim 5, wherein, The cover plate assembly further includes a cover plate (3) provided with at least one cover plate pole insertion port (31). The pole (5) further includes an insertion part (51) and a connection part (52) connected along the axial direction of the pole (5), the connection part (52) is fixedly connected with the tab connection part (22) of the adapter sheet (2), and the insertion part (51) is inserted into the cover plate (3) through the cover plate pole insertion port (31). The cover plate assembly further includes a lower plastic (4) located between the connection part (52) of the pole (5) and the cover plate (3), and the lower plastic (4) is fixedly connected to the cover plate (3). The lower plastic (4) is provided with a lower plastic pole plug-in interface (41) coaxial with the cover plate pole plug-in interface (31), and the plug-in part (51) sequentially passes through the lower plastic pole plug-in interface (41) and the cover plate pole plug-in interface (31) to complete plug-in; The pole (5) further comprises a pole sealing ring (53), an upper plastic (54), and a pole pressing plate (55); The pole sealing ring (53) is located between the cover plate pole plug-in interface (31) and the lower plastic pole plug-in interface, and is used to improve the sealing performance of the pole (5); The upper plastic (54) is located above the cover plate pole plug-in interface (31) and is used to insulate the pole (5), and the pole pressing plate (55) is matched with the upper plastic (54), and the pole pressing plate (55) is embedded in the upper plastic (54); The plug-in part (51) is sequentially provided with a first positioning groove (511), a second positioning groove (512), a third positioning groove (513), and a fourth positioning groove (514) along the axial direction of the plug-in part (51) from the connecting part (52) upwards; The first positioning groove (511) is matched with the lower plastic pole plug-in interface (41), the second positioning groove (512) is matched with the pole sealing ring (53), the third positioning groove (513) is matched with the cover plate pole plug-in interface (31), and the fourth positioning groove (514) is matched with the pole pressing plate (55); The lower plastic pole plug-in interface (41) is further provided with a protruding limiting boss on the contact surface of the lower plastic pole plug-in interface (41) and the pole sealing ring (53); The cover plate (3) is further provided with an upper plastic positioning groove (32) coaxial with the cover plate pole plug-in interface (31) and matched with the positive upper plastic.

8. The cover plate assembly of claim 7, wherein, The cover plate assembly further comprises an anti-explosion sheet (61) and an anti-explosion patch (62), the lower plastic is further provided with an anti-explosion net (63), the cover plate (3) is further provided with an anti-explosion port (64) matched with the anti-explosion net (63), the anti-explosion sheet (61) is arranged between the anti-explosion net (63) and the anti-explosion port (64) and is fixedly connected with the anti-explosion net (63) and the anti-explosion port (64), and the anti-explosion patch (62) is attached to the anti-explosion port (64); The anti-explosion sheet (61) is consistent in shape with the anti-explosion net (63) but has an area greater than that of the anti-explosion net (63).

9. The cover plate assembly of claim 7, wherein, The cover plate assembly further comprises a sealing nail (71); The lower plastic (4) and the cover plate (3) are further provided with coaxial lower plastic sealing openings (73) and cover plate sealing openings (72), and the sealing nail (71) is sequentially embedded in the cover plate sealing openings (72) and the lower plastic sealing openings (73) and is fixedly connected with the cover plate sealing openings (72) and the lower plastic sealing openings (73).

10. A battery, characterized by The cover plate assembly comprises the cover plate assembly according to any one of claims 5-9.

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