Cover plate assembly of battery, battery and battery pack

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a cover plate assembly of a battery, the battery and a battery pack, and the cover plate assembly of the battery comprises a cover plate; the retainer is arranged on one side, in the thickness direction of the retainer, of the cover plate and comprises a retainer body and a skirt edge part, the skirt edge part is arranged along the edge of the retainer body, at least one part of the skirt edge part is arranged between the retainer body and the cover plate, and the thickness of the skirt edge part is A mm; the insulation part is arranged between the cover plate and the frame body and connected to the skirt edge part, the minimum distance between the edge of the insulation part and the edge of the cover plate in the width direction of the cover plate is B mm, and A / B is larger than or equal to 0.06 and smaller than or equal to 9.8. According to the utility model, the possibility that the tabs contact the cover plate through the gaps can be reduced, thereby reducing the risk of short circuit of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field especially, and it is a kind of battery's cover plate subassembly, battery and battery pack. BACKGROUND

[0002] At present, the lower plastic and retainer of battery still exist larger gap after assembly, and the possibility of tab contact cover plate through gap, lead to battery short circuit, and the assembly structure strength of retainer and lower plastic is poor, once assembly structure fails, lower plastic displacement, prone to lower plastic insulation failure, lead to battery short circuit. SUMMARY

[0003] The utility model discloses a kind of battery's cover plate subassembly, battery and battery pack, can reduce the risk of battery short circuit.

[0004] To achieve the above purpose, the utility model provides a kind of battery's cover plate subassembly, comprising:

[0005] Cover plate;

[0006] Retainer, it is arranged in the side of the cover plate along the thickness direction of itself, the retainer includes frame body and skirt edge portion, the skirt edge portion is arranged along the edge of the frame body, at least a part of the skirt edge portion is arranged between the frame body and the cover plate, the thickness of the skirt edge portion is Amm;

[0007] Insulating piece, it is arranged between the cover plate and the frame body and is connected on the skirt edge portion, the minimum distance of the edge of the insulating piece and the cover plate edge in the width direction of the cover plate is B mm, satisfy: 0.06≤A / B≤9.8.

[0008] The utility model further provides a kind of battery, comprising:

[0009] Shell, one end surface is provided with opening;

[0010] Battery cell, it is arranged in the shell interior;

[0011] The cover plate subassembly of battery as described above, its cover is arranged on the opening.

[0012] The utility model further provides a kind of battery pack, comprising the battery as described above.

[0013] The utility model provides a kind of battery's cover plate subassembly, battery and battery pack, compared with prior art, it has the beneficial effect in that:

[0014] The battery cover plate assembly of the utility model discloses, including cover plate, retainer and insulating piece, the retainer includes the frame body and the skirt edge part of setting in the frame body edge, the insulating piece is connected on the skirt edge and is located between the frame body and the cover plate. Through the thickness of skirt edge part, the distance relation of insulating piece and cover plate in the width direction of cover plate, can ensure the connecting strength between skirt edge part and insulating piece while guaranteeing assembly efficiency, avoid the connection failure between skirt edge part and insulating piece, and can control the gap between retainer and insulating piece, reduce the possibility of the contact of pole lug through gap cover plate, thereby reduce the risk of battery short circuit.

[0015] The battery of the utility model discloses, including the cover plate assembly of above-mentioned battery, can reduce the possibility of the contact of pole lug through gap cover plate, thereby reduce the risk of battery short circuit.

[0016] The battery pack of the utility model discloses, including above-mentioned battery, can reduce the possibility of the contact of pole lug through gap cover plate, thereby reduce the risk of battery short circuit. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structure schematic diagram of the battery of the utility model embodiment.

[0018] Figure 2 It is the partial structure schematic diagram of the battery of the utility model embodiment.

[0019] Figure 3 It is Figure 2 The enlarged schematic diagram of in alpha.

[0020] Figure 4 It is the assembly schematic diagram of the retainer and insulating piece of the utility model embodiment.

[0021] Figure 5 It is Figure 4 The assembly schematic diagram of the retainer and pole lug in.

[0022] Figure 6 It is the position schematic diagram between the insulating piece and cover plate of the utility model embodiment.

[0023] Figure 7 It is Figure 6 The enlarged schematic diagram of in beta.

[0024] Figure 8 It is the structure schematic diagram of the retainer of the utility model embodiment.

[0025] Figure 9 It is Figure 8 The enlarged schematic diagram of in gamma.

[0026] Figure 10 It is the structure schematic diagram of the insulating piece of the utility model embodiment.

[0027] In the figure, 1, cover plate; 2, retainer; 3, insulating piece; 4, shell; 5, tab;

[0028] 21, frame; 22, skirt portion; 23, first space; 24, partition; 25, second space; 221, buckle groove; 31, main body; 32, buckle portion; 41, opening. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0030] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0033] For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] As Figure 1 shown, the cover plate assembly of the battery of the embodiment of the present application comprises: a cover plate 1, a retainer 2 and an insulating piece 3.

[0035] The retainer 2 is arranged on one side of the cover plate 1 along the thickness direction of the cover plate 1, and includes a frame body 21 and a skirt portion 22 arranged along the edge of the frame body 21, at least a part of the skirt portion 22 being arranged between the frame body 21 and the cover plate 1, and the thickness of the skirt portion 22 being A mm.

[0036] The retainer 2 is arranged in the battery, and the tab 5 is assembled to the retainer 2 so that the tab 5 can be connected to the pole, and the pole can be electrically connected to the cell inside the battery.

[0037] The insulating member 3 is arranged between the cover plate 1 and the frame body 21 and connected to the skirt portion 22, and the minimum distance between the edge of the insulating member 3 and the edge of the cover plate 1 in the width direction of the cover plate 1 is B mm, and the following condition is satisfied: 0.06≤A / B≤9.8. Preferably, A / B can also take the values of 0.06, 0.2, 2.4, 3.7, 4.98, 5, 6.12, 7, 8.42, 9.8, etc.

[0038] The arrangement of the insulating member 3 can insulate the cover plate 1 and the tab 5, and ensure that the cover plate 1 is not electrified, and the battery does not short circuit.

[0039] If the value of A / B is too large, the insulating member 3 is not easy to assemble to the skirt portion 22, the assembly of the insulating member 3 and the retainer 2 is difficult, the assembly efficiency is low, the tab 5 is easily torn during assembly, the overcurrent capacity is affected, and the overcurrent requirement of the tab 5 cannot be met. If the value of A / B is too small, the gap between the skirt portion 22 and the insulating member 3 is too large, the tab 5 is easy to contact the cover plate 1 through the gap, or lap with the shell 4, causing insulation failure, leading to short circuit of the battery, and the connection strength between the retainer 2 and the insulating member 3 is also poor. When the connection between the retainer 2 and the insulating member 3 fails, the insulating member 3 moves relative to the retainer 2, affecting the positioning and bundling effect of the tab 5, the tab 5 is easy to deviate and lap with the shell 4 or the cover plate 1, and insulation failure is easy to occur, leading to short circuit of the battery.

[0040] By limiting the thickness of the skirt portion 22, the distance relationship between the insulating member 3 and the cover plate 1 in the width direction of the cover plate 1, the connection strength between the skirt portion 22 and the insulating member 3 can be ensured while the assembly efficiency is guaranteed, the connection between the skirt portion 22 and the insulating member 3 is avoided to fail, and the gap between the retainer 2 and the insulating member 3 can be controlled, reducing the possibility of the tab 5 contacting the cover plate 1 through the gap, thereby reducing the risk of battery short circuit.

[0041] When measuring A and B, common length measuring tools can be used, such as ruler, tape measure, etc.

[0042] Specifically, when measuring A, the distance between the outer side and the inner side of the skirt portion 22 is measured, and the thickness of the skirt portion 22 is A mm, which is obtained by measuring multiple times and taking the average value.

[0043] In the measurement B, the insulating piece 3 and the cover plate 1 in the assembled state are taken, the edge of the insulating piece 3 is taken as a reference edge, the distance between the edge of the cover plate 1 closest to the reference edge and the reference edge in the width direction of the cover plate 1 is measured, the measurement is averaged multiple times, and the minimum distance Bmm between the edge of the insulating piece 3 and the edge of the cover plate 1 in the width direction of the cover plate 1 is obtained.

[0044] In some embodiments, the thickness A mm of the skirt portion 22 also satisfies: 0.2≤A≤4. Preferably, A can take values of 0.2, 1, 1.8, 2.4, 3.1, 3.4, 4, etc.

[0045] If A takes a value that is too large, the skirt portion 22 is too thick, the insulating piece 3 is not easy to assemble onto the skirt portion 22, and the assembly efficiency is relatively low. If A takes a value that is too small, the skirt portion 22 is too thin, the connection strength between the retainer 2 and the insulating piece 3 is poor, insulation failure is prone to occur, and the battery is prone to short circuit.

[0046] In some embodiments, the minimum distance Bmm between the edge of the insulating piece 3 and the edge of the cover plate 1 in the width direction of the cover plate 1 also satisfies: 0.2≤B≤4. Preferably, B can take values of 0.2, 1, 1.6, 2.1, 2.7, 3.2, 3.8, 4, etc.

[0047] If B takes a value that is too large, the difference between the size of the insulating piece 3 and the size of the cover plate 1 is too large, insulation failure is prone to occur, and the battery is prone to short circuit. If B takes a value that is too small, the size of the insulating piece 3 will affect the size of the retainer 2, and it is not easy to realize the connection structure of the insulating piece 3 and the retainer 2.

[0048] In some embodiments, the insulating piece 3 includes a main body 31 and a buckle portion 32 arranged on the main body 31, and the skirt portion 22 is provided with a buckle groove 221 corresponding to the buckle portion 32, and the buckle portion 32 is buckled with the buckle groove 221.

[0049] Through the connection mode of the buckle portion 32 and the buckle groove 221, the insulating piece 3 and the retainer 2 can be directly assembled through the buckle portion 32 of the insulating piece 3 and the buckle groove 221 of the retainer 2 during assembly, and the connection strength between the insulating piece 3 and the retainer 2 is high, the installation of the insulating piece 3 and the skirt portion 22 is easy, the assembly difficulty is reduced, and the assembly efficiency of the insulating piece 3 and the retainer 2 is improved.

[0050] The thickness A mm of the skirt portion 22 and the minimum distance Bmm between the edge of the insulating piece 3 and the edge of the cover plate 1 in the width direction of the cover plate 1 also satisfy: 0.08≤A / B≤9.8. Preferably, A / B can take values of 0.08, 0.58, 1.5, 2.2, 3.47, 5.61, 6.72, 8.54, 9.14, 9.8, etc.

[0051] Due to the connection mode of the buckle part 32 and the buckle slot 221, the assembly of the insulating part 3 and the skirt part 22 is facilitated, and therefore, when the above range is met, the connection strength between the skirt part 22 and the insulating part 3 can be ensured while the assembly efficiency is ensured, and the risk of insulation failure is reduced.

[0052] The buckle slot 221 is provided in plurality, and is located on the skirt part 22 at both ends of the retainer 2 in the length direction of the cover plate 1. Plurality means two or more. At least one buckle slot 221 is provided on the skirt part 22 at each end, and the number and position of the buckle part 32 and the buckle slot 221 are correspondingly provided, thereby improving the assembly strength between the retainer 2 and the insulating part 3, avoiding clamping failure, and reducing insulation failure to cause short circuit of the battery. For example, the number of buckle slots can be 2 or 4.

[0053] The thickness A mm of the skirt part 22 and the minimum distance B mm between the edge of the insulating part 3 and the edge of the cover plate 1 in the width direction of the cover plate 1 also satisfy: 0.08≤A / B≤9.6. Preferably, A / B can take values of 0.08, 0.35, 1.32, 2.5, 3.98, 4.54, 5.7, 6, 7.16, 8.92, 9.08, 9.6, etc.

[0054] The buckle part 32 is provided in plurality and at both ends on the retainer 2, which can uniformly distribute the connection strength of the skirt part 22 and the insulating part 3. When the above range is met, the connection strength between the skirt part 22 and the insulating part 3 can be ensured while the assembly efficiency is ensured, and the risk of insulation failure is reduced.

[0055] The minimum distance C mm between the buckle slot 221 and the edge of the skirt part 22 away from the frame body 21 in the thickness direction of the cover plate 1 satisfies: 0.2≤C≤10. Preferably, C can take values of 0.2, 1, 2.8, 3.1, 4.9, 5, 6.3, 7.5, 8.1, 9, 10, etc.

[0056] If C is too large, the cantilever of the buckle part 32 is too long, which will affect the clamping strength between the buckle part 32 and the buckle slot 221, and the clamping failure between the insulating part 3 and the retainer 2 is prone to occur, leading to insulation failure and causing short circuit of the battery. If C is too small, the cantilever of the buckle part 32 is too short, and the deformation of the buckle part 32 during clamping is too small, which will lead to difficulty in clamping and low assembly efficiency of the retainer 2 and the insulating part 3.

[0057] When measuring C, a common length measuring tool can be used, such as a ruler or a tape measure.

[0058] Specifically, in measuring C, the distance between the groove wall of the buckle groove 221 closest to the edge of the skirt portion 22 and the reference edge is measured, and the measurement is repeated multiple times and averaged to obtain the minimum distance C mm of the buckle groove 221 from the edge of the skirt portion 22 in the thickness direction of the cover plate 1.

[0059] The minimum distance between the skirt portion 22 and the buckle groove 221 at the two end faces of the retainer 2 is D mm, which satisfies: 1≤D≤50. Preferably, D can take values such as 1, 6, 12, 19, 21, 28, 32, 35, 44, 46, 50, etc.

[0060] If D is too large, the buckle groove 221 is far away from the edge of the skirt portion 22, and there is a high manufacturing and processing difficulty for both the buckle groove 221 and the buckle portion 32. If D is too small, the position of the buckle groove 221 is too close to the end face of the retainer 2, which affects the clamping strength between the buckle portion 32 and the buckle groove 221, and is easy to cause the clamping failure between the insulating piece 3 and the retainer 2, resulting in insulation failure and causing the battery to short circuit.

[0061] In measuring D, a general length measuring tool can be used, such as a ruler, a tape measure, etc.

[0062] Specifically, in measuring D, the end face of the retainer 2 closest to the buckle groove 221 is taken as the reference face, the distance between the groove wall of the buckle groove 221 closest to the reference face and the reference face is measured, and the measurement is repeated multiple times and averaged to obtain the minimum distance D mm between the skirt portion 22 and the buckle groove 221 at the two end faces of the retainer 2.

[0063] In this embodiment, the skirt portion 22 and the frame body 21 enclose the first space 23, and the retainer 2 further includes a partition portion 24, which is arranged in the first space 23, so that the partition portion 24, the skirt portion, and the frame body 21 enclose the second space 25 for accommodating the tab 5, and the buckle groove 221 avoids the second space 25.

[0064] The partition portion 24 is in the form of a partition plate, the tab 5 is installed in the second space 25, and the buckle groove 221 does not provide the second space 25, thereby avoiding the influence of the clamping deformation on the gap size between the insulating piece 3 and the skirt portion 22, reducing the possibility that the tab 5 easily contacts the cover plate 1 through the gap, and reducing the risk of short circuit of the battery.

[0065] The utility model also provides a battery, including shell 4, electric core and above-mentioned cover plate assembly.

[0066] The shell 4 is provided with an opening 41 on at least one end face; the electric core is arranged in the interior of the shell 4; the cover plate assembly is arranged on the opening 41, and the cover plate assembly 41 closes the opening 41 and encloses the electric core in the interior of the shell 4.

[0067] In the embodiment, the shell 4 is rectangular, and the shell 4 is provided with openings 41 at both ends, and the openings 41 are both covered with a cover plate assembly.

[0068] The utility model still provides a kind of battery, including several above-mentioned batteries.

[0069] The above is only preferred embodiment of the utility model, it should be pointed out, for the ordinary skilled person in the prior art, without departing from the technical principle of the utility model, can make several improvements and substitutions on the premise, these improvements and substitutions also should be regarded as the protection range of the utility model.

Claims

1. A cover plate assembly for a battery, characterized by The battery cover plate assembly comprises: a cover plate; a holder arranged on one side of the cover plate along the thickness direction of the cover plate, the holder comprising a holder body and a skirt portion arranged along the edge of the holder body, at least a part of the skirt portion being arranged between the holder body and the cover plate, the thickness of the skirt portion being A mm; an insulating member arranged between the cover plate and the holder body and connected to the skirt portion, the minimum distance between the edge of the insulating member and the edge of the cover plate in the width direction of the cover plate being B mm, satisfying 0.06≤A / B≤9.

8.

2. The battery cover plate assembly according to claim 1, wherein: the thickness A mm of the skirt portion further satisfies 0.2≤A≤2.

3. The battery cover plate assembly according to claim 1, wherein: the minimum distance B mm between the edge of the insulating member and the edge of the cover plate in the width direction of the cover plate further satisfies 0.2≤B≤4.

4. The battery cover plate assembly according to claim 1, wherein: the insulating member comprises a main body and a clamping portion arranged on the main body, the skirt portion is provided with a clamping groove corresponding to the clamping portion, and the clamping portion is clamped to the clamping groove.

5. The battery cover plate assembly according to claim 4, wherein: the thickness A mm of the skirt portion and the minimum distance B mm between the edge of the insulating member and the edge of the cover plate in the width direction of the cover plate further satisfy 0.08≤A / B≤9.

8.

6. The battery cover plate assembly according to claim 4, wherein: the clamping groove is provided in plurality, and the clamping groove is arranged on the skirt portion at both ends of the holder in the length direction of the cover plate.

7. The battery cover plate assembly according to claim 6, wherein: the thickness A mm of the skirt portion and the minimum distance B mm between the edge of the insulating member and the edge of the cover plate in the width direction of the cover plate further satisfy 0.08≤A / B≤9.

6.

8. The battery cover plate assembly according to claim 4, wherein: the minimum distance C mm between the edge of the clamping groove and the skirt portion away from the holder body in the thickness direction of the cover plate satisfies 0.2≤C≤10.

9. The battery cover plate assembly according to claim 4, wherein: the minimum distance D mm between the skirt portion and the clamping groove at both end surfaces of the holder in the length direction of the cover plate satisfies 1≤D≤50.

10. The battery cover plate assembly according to claim 4, wherein: the skirt portion and the holder body enclose a first space, the holder further comprises a partition portion arranged in the first space, so that the partition portion, the skirt portion and the holder body enclose a second space for accommodating a tab, and the clamping groove avoids the second space.

11. A battery, characterized by The battery comprises: a shell provided with an opening on at least one end surface; an electric core arranged in the shell; and the battery cover plate assembly according to any one of claims 1-10, which is arranged on the opening.

12. A battery pack, characterized by, The battery comprises a plurality of batteries according to claim 11.

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