Battery cover plate assembly, battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cover plate assembly, a battery and a battery pack, and the battery cover plate assembly comprises a cover plate body, a pole, a sealing ring, an insulating plate and an adapter piece. The lower surface of the cover plate body is provided with a groove, a through hole penetrating through the groove and a flange part surrounding the through hole and located in the cover plate body. The pole is arranged on the cover plate body through the through hole, and a sealing ring is arranged between the pole and the through hole; the insulating plate is arranged outside the sealing ring in a sleeving manner, abuts against the flange part and is arranged in the groove; and the upper surface of the adapter sheet is electrically connected with the lower surface of the pole. According to the utility model, the lower surface of the cover plate body is provided with the groove, the groove is used for accommodating the insulating plate, and the groove is provided with the through hole for installing the pole, so that the adapter sheet and the pole can be electrically connected at the position of the groove, the occupied space of the adapter sheet and the insulating plate is reduced, the space utilization rate is improved, and the energy sealing performance is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to battery cover plate subassembly, battery and battery package. BACKGROUND

[0002] With the development of new energy technology, battery package is applied in various new energy products more and more.In the battery package, the pole post is connected with the pole group through the adapter piece to realize the conduction.

[0003] However, the existing battery package, the adapter piece needs to occupy more space of the battery package, and there is the problems of low space utilization and low energy density. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of battery cover plate subassembly, battery and battery package to solve the problems of low space utilization and low energy density caused by the adapter piece of battery package needing to occupy more space of the battery package.

[0005] Firstly, the utility model provides a kind of battery cover plate subassembly, comprising:

[0006] Cover plate body, lower surface is equipped with recess, the cover plate body is also equipped with through hole passing through the recess and the flange portion around the through hole and located in the cover plate body interior;

[0007] Pole post, through the through hole, is equipped on the cover plate body, and sealing ring is equipped between the through hole;

[0008] Insulating plate, is equipped outside the sealing ring, and is in abutment with the flange portion, and the insulating plate is equipped in the recess;

[0009] Adapter piece, upper surface is electrically connected with the lower surface of the pole post.

[0010] Secondly, the utility model further provides a kind of battery, comprising:

[0011] Shell, is equipped with opening and at least one pole group equipped in the shell;

[0012] The battery cover plate subassembly described above, the cover plate body is equipped in the opening of the shell, and the pole group is electrically connected with the pole post through the adapter piece.

[0013] Thirdly, the utility model further provides a kind of battery package, comprising: at least one above-mentioned battery.

[0014] The technical scheme has the beneficial effects that: the utility model discloses a recess is equipped with on the lower surface of the cover plate body, and the recess is used to accommodate the insulating plate, and the through hole for installing the pole is arranged at the recess, so that the adapter piece and the pole can be electrically connected in the recess, thereby reducing the occupied space of the adapter piece and the insulating plate, improving the space utilization, and the energy sealing is higher. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0016] Figure 1 It is a structural schematic diagram of a battery cover plate assembly of the utility model embodiment.

[0017] Figure 2 It is a top view of a battery cover plate assembly of the utility model embodiment.

[0018] Figure 3 It is a sectional view of a battery cover plate assembly of the utility model embodiment.

[0019] Figure 4 It is a sectional view of a battery cover plate assembly of the utility model embodiment. Figure 3 It is a local enlarged schematic view of A.

[0020] Figure 5 It is a local enlarged schematic view of B. Figure 4 It is a local enlarged schematic view of B.

[0021] Figure 6 It is an explosion view of a battery cover plate assembly of the utility model embodiment.

[0022] Figure 7 It is a front view of the support column of a battery cover plate assembly of the utility model embodiment.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, cover plate body;101, recess;102, flange part;103, support column;2, pole;201, second welding groove;3, sealing ring;4, insulating plate;401, first positioning hole;5, adapter piece;501, boss;502, second positioning hole;503, first welding groove;6, insulating piece. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] The embodiments of the utility model will be described below in conjunction with Figures 1 to 7 .

[0027] According to the embodiments of the utility model, on the one hand, a battery cover plate assembly is provided, mainly comprising: a cover plate body 1, a pole 2, a sealing ring 3, an insulating plate 4 and an adapter piece 5. The lower surface of the cover plate body 1 is provided with a groove 101, and the cover plate body 1 is further provided with a through hole passing through the groove 101 and a flange portion 102 surrounding the through hole and located inside the cover plate body 1; the pole 2 is arranged on the cover plate body 1 through the through hole, and the sealing ring 3 is arranged between the pole 2 and the through hole; the insulating plate 4 is sleeved outside the sealing ring 3 and abuts against the flange portion 102, and the insulating plate 4 is arranged in the groove 101; and the upper surface of the adapter piece 5 is electrically connected with the lower surface of the pole 2.

[0028] The battery cover plate assembly provided by the embodiments of the utility model is provided with the groove 101 on the lower surface of the cover plate body 1, the insulating plate 4 is accommodated by the groove 101, and the groove 101 can limit the insulating plate 4. The through hole for mounting the pole 2 is arranged at the groove 101, so that the adapter piece 5 and the pole 2 can be electrically connected in the groove 101, thereby reducing the occupied space of the adapter piece 5 and the insulating plate 4, improving the space utilization rate, and having higher energy sealing. The electrically connected mode can be welding.

[0029] Moreover, the adapter piece 5 can be arranged close to the cover plate body 1, and the electrically conductive path between the pole group of the battery and the pole 2 is also shortened, thereby facilitating the reduction of the temperature rise of the battery.

[0030] Specifically, the up-down direction of the embodiments of the utility model is indicated by an arrow Z in Figure 1 . The lower end of the pole 2 is mounted in the through hole, and the upper end is exposed from the upper surface of the cover plate body 1. As shown in Figure 5 , the battery cover plate assembly further comprises an insulating piece 6. The insulating piece 6 is sleeved on the upper end of the pole 2. The insulating piece 6 is located between the pole 2 and the flange portion 102. The upper end of the flange portion 102 is supported by the insulating piece 6 and the sealing ring 3, and the lower end is supported by the insulating plate 4 and the adapter piece 5. The insulating piece 6 and the insulating plate 4 jointly play an insulating effect.

[0031] It should be noted that the material of the sealing ring 3 is not limited in the embodiments of the present application, for example, the sealing ring 3 can adopt a fluorine rubber sealing ring, a silica gel sealing ring and the like. In addition, the material of the insulating piece 6 and the insulating plate 4 is also not limited, for example, the insulating piece 6 and the insulating plate 4 can both be made of plastic, wherein the insulating piece 6 is made of PPS+GF30% (polyphenylene sulfide added with 30% glass fiber), and the insulating plate 4 is made of PP (polypropylene). In addition, the material of the cover plate body 1 is also not limited, for example, the cover plate body 1 can be made of aluminum.

[0032] In one embodiment, as shown in Figure 5 and Figure 6 , the upper surface of the adapter piece 5 is provided with a boss 501, which is electrically connected with the lower surface of the pole 2 through the boss 501, and the boss 501 extends to the bottom of the insulating plate 4 for supporting the flange part 102. Along the first direction (Z direction), the orthographic projection of the groove 101 covers the orthographic projection of the upper surface of the boss 501. The height direction of the cover plate body 1 is also the up-down direction, as shown by the arrow Z in Figure 1 .

[0033] In the embodiments of the present application, the boss 501 is arranged on the upper surface of the adapter piece 5, which is welded with the lower surface of the pole 2 through the boss 501 with a small surface size, so that the planeness of the welding surface of the adapter piece 5 is easily controlled, and the welding quality between the adapter piece 5 and the pole 2 is improved. Moreover, the boss 501 also extends to the bottom of the insulating plate 4, which can support the flange part 102, avoid the deformation of the flange part 102 caused by the elastic force of the sealing ring 3, and even the collapse phenomenon, and improve the structural stability of the flange part 102. The projection of the groove 101 in the height direction of the cover plate body 1 covers the upper surface of the boss 501, so that the boss 501 can be installed in the groove 101, and the occupied space of the boss 501 is saved.

[0034] Further, in one embodiment, as shown in Figure 1 and Figure 5 , in the first direction (Z direction), the height H1 of the boss 501 and the thickness T1 of the insulating plate 4 are greater than the depth T2 of the groove 101. The thickness T1 of the insulating plate 4 is less than the depth T2 of the groove 101, so that the insulating plate 4 is installed in the groove 101, and the occupied space of the insulating plate 4 is saved. The boss 501 is partially inserted into the groove 101, so that the other part of the adapter piece 5 without the boss 501 is outside the groove 101, avoiding the mutual interference between the upper surface of the adapter piece 5 and the lower surface of the cover plate body 1, and avoiding affecting the welding of the boss 501 and the adapter piece 5.

[0035] In an embodiment, the depth T2 of the groove 101 satisfies 0.7mm≤T2≤1mm. For example, the depth T2 of the groove 101 is 0.7mm, 0.8mm, 1mm, etc. If the depth T2 of the groove 101 is less than 0.7mm, the space utilization is not obviously improved, and if the depth T2 of the groove 101 is greater than 1mm, the support strength of the cover plate body 1 is poor.

[0036] In an embodiment, the height H1 of the boss 501 satisfies 0.1mm≤H1≤0.3mm. For example, the height H1 of the boss 501 is 0.1mm, 0.2mm, 0.3mm, etc. If the height H1 of the boss 501 is less than 0.1mm, the welding of the boss 501 and the pole 2 is easily affected, and if the height H1 of the boss 501 is greater than 0.3mm, the boss 501 occupies a large space.

[0037] It should be noted that the shape of the boss 501 is not limited in the embodiments of the present application, and the boss 501 can be selected as a regular shape such as a circle, a square, an ellipse, etc. according to needs.

[0038] In an embodiment, as shown in Figure 6 and Figure 7 The groove 101 is provided with a plurality of support columns 103 at the groove bottom, the plurality of support columns 103 avoid the boss 501, the insulating plate 4 is provided with a plurality of first positioning holes 401 corresponding to the plurality of support columns 103, the adapter piece 5 is provided with a plurality of second positioning holes 502 corresponding to the plurality of support columns 103, and the plurality of support columns 103 are respectively and one-to-one installed in the first positioning holes 401 and the second positioning holes 502.

[0039] After the adapter piece 5 is welded with the pole 2, the sealing ring 3 is compressed between the pole 2 and the flange part 102, the sealing ring 3 has elasticity and exerts a rebound force towards the flange part 102 and the pole 2 after being compressed. The plurality of support columns 103 pass through the insulating plate 4 and are connected with the adapter piece 5, can bear the rebound force of the sealing ring 3, reduce the rebound force of the sealing ring 3 acting on the weld joint between the boss 501 and the pole 2, and further improve the welding stability between the adapter piece 5 and the pole 2. The support column 103 can also limit the height of the pole 2, to avoid the pole 2 being pushed upward by the rebound of the sealing ring 3.

[0040] For example, the groove 101 is a rectangular groove, one support column 103 is arranged at each of the four corners of the groove bottom, the first positioning hole 401 is a through hole, and the second positioning hole 502 is a blind hole. The support column 103 respectively passes through the first positioning hole 401 and is installed in the second positioning hole 502. The support column 103 is a ceramic column and has high strength and insulation.

[0041] In an embodiment, as shown in Figure 7As shown, the diameter d of the support column 103 satisfies 3mm≤d≤5mm. For example, the diameter d of the support column 103 is 3mm, 4mm, 5mm, etc. By limiting the diameter d of the support column 103, the structural strength and the occupied space of the support column 103 are balanced.

[0042] In one embodiment, as shown in Figure 5 As shown, the thickness T3 of the adapter piece 5 satisfies 0.8mm<T3<2.5mm. For example, the thickness T3 of the adapter piece 5 is 0.8mm, 1mm, 2.5mm, etc. By limiting the thickness T3 of the adapter piece 5, the structural strength and the occupied space of the adapter piece 5 are balanced.

[0043] In one embodiment, as shown in Figure 5 As shown, the boss 501 is welded to the pole 2, and the bottom of the adapter piece 5 is stamped to form a first welding groove 503 corresponding to the welding area, so that the top of the adapter piece 5 forms the boss 501. The structure is simple, the manufacturing difficulty is low, and the processing is convenient.

[0044] Specifically, the adapter piece 5 is connected to the pole 2 by penetration welding. The first welding groove 503 can also position the welding of the boss 501 and the pole 2, improve the accuracy of the welding position, and avoid welding on the insulating plate 4 which is not resistant to high temperature.

[0045] In one embodiment, as shown in Figure 2 and Figure 6 As shown, the top of the pole 2 is provided with a second welding groove 201. The second welding groove 201 is used for welding positioning of the pole 2 and the busbar, which can ensure the accuracy of the welding position and prevent the busbar from being directly welded to the cover plate body 1 to cause short circuit.

[0046] According to the embodiments of the utility model, on the other hand, a battery is also provided, mainly comprising: a shell and a battery cover plate assembly. The shell is provided with an opening and at least one pole group arranged in the shell. The cover plate body 1 of the battery cover plate assembly is arranged at the opening of the shell, and the pole group is electrically connected to the pole 2 through the adapter piece 5.

[0047] Because the battery includes the above-mentioned battery cover plate assembly, it has the same effect as the battery cover plate assembly, which will not be repeated here.

[0048] Specifically, the shell has a cavity inside, the opening is communicated with the cavity, and the at least one pole group is arranged in the cavity. The pole group is provided with a tab and is welded to the adapter piece 5.

[0049] It should be noted that the pole 2 is provided in pairs, including a positive pole and a negative pole. The adapter piece 5 corresponds to the pole 2 one by one. The pole group is provided with a positive tab and a negative tab. One of the adapter pieces 5 connects the positive pole and the positive tab of the pole group, and the other of the adapter pieces 5 connects the negative pole and the negative tab of the pole group.

[0050] AsFigure 1 As shown, the pair of pole posts 2 can be selectively installed at opposite ends of the cover plate body 1 as required, or one of the pole posts 2 can be installed on the cover plate body 1 and the other pole post 2 can be installed on the shell. The specific arrangement can be selected according to actual needs, and the embodiments of the present application do not make too many limitations.

[0051] According to the embodiments of the present application, in a further aspect, a battery pack is also provided, comprising: at least one battery.

[0052] Because the battery pack comprises the above-mentioned battery, it has the same effect as the battery, which will not be repeated here.

[0053] In one embodiment, the battery pack comprises a plurality of batteries, which can be selectively connected in series to form the battery pack, or can be selectively connected in parallel to form the battery pack, or can be connected in a combination of series and parallel to form the battery pack, and the embodiments of the present application do not make too many limitations.

[0054] To realize the basic function of the battery pack, the battery pack in the embodiment can further comprise other necessary modules or components, such as a control system, a heat dissipation system, etc. It should be noted that the other necessary modules or components included in the battery pack can be selected from any suitable existing structure. In order to clearly and simply describe the technical solutions provided by the embodiments, the above-mentioned parts will not be described here, and the drawings of the specification are also simplified accordingly. However, it should be understood that the present application is not limited in scope by this.

[0055] Although the embodiments of the present application have been described in conjunction with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery cover assembly, characterized in that, include: The cover plate body (1) has a groove (101) on its lower surface. The cover plate body (1) also has a through hole passing through the groove (101) and a flange (102) surrounding the through hole and located inside the cover plate body (1). The pole (2) is provided on the cover plate body (1) through the through hole, and a sealing ring (3) is provided between it and the through hole. An insulating plate (4) is fitted over the sealing ring (3) and abuts against the flange (102). The insulating plate (4) is located in the groove (101). The upper surface of the adapter piece (5) is electrically connected to the lower surface of the pole piece (2).

2. The battery cover assembly according to claim 1, characterized in that, The upper surface of the adapter piece (5) is provided with a boss (501), which is electrically connected to the lower surface of the pole post (2) through the boss (501). The boss (501) extends to the bottom of the insulating plate (4) to support the flange (102). Along the first direction, the orthographic projection of the groove (101) covers the orthographic projection of the upper surface of the boss (501).

3. The battery cover assembly according to claim 2, characterized in that, In the first direction, the sum of the height H1 of the boss (501) and the thickness T1 of the insulating plate (4) is greater than the depth T2 of the groove (101).

4. The battery cover assembly according to claim 3, characterized in that, The depth T2 of the groove (101) satisfies 0.7mm≤T2≤1 mm.

5. The battery cover assembly according to claim 3, characterized in that, The height H1 of the boss (501) satisfies 0.1mm≤H1≤0.3mm.

6. The battery cover assembly according to claim 2, characterized in that, The groove (101) has a plurality of support columns (103) spaced apart at the bottom of the groove. The plurality of support columns (103) avoid the boss (501). The insulating plate (4) has a plurality of first positioning holes (401) corresponding to the plurality of support columns (103). The adapter plate (5) has a plurality of second positioning holes (502) corresponding to the plurality of support columns (103). The plurality of support columns (103) are respectively installed in the first positioning holes (401) and the second positioning holes (502).

7. The battery cover assembly according to claim 6, characterized in that, The diameter d of the support column (103) satisfies 3mm≤d≤5mm.

8. The battery cover assembly according to claim 2, characterized in that, The thickness T3 of the adapter piece (5) satisfies 0.8mm < T3 < 2.5mm.

9. The battery cover assembly according to any one of claims 2 to 8, characterized in that, The boss (501) is welded to the pole post (2), and the bottom of the adapter piece (5) is stamped to form a first welding groove (503) corresponding to the welding area, so that the boss (501) is formed on the top of the adapter piece (5).

10. The battery cover assembly according to any one of claims 1 to 8, characterized in that, A second welding groove (201) is formed on the upper surface of the pole post (2).

11. A battery, characterized in that, include: A housing having an opening and at least one pole assembly disposed within the housing; According to any one of claims 1 to 10, the battery cover assembly, the cover body (1) is disposed over the opening of the housing, and the electrode group is electrically connected to the terminal post (2) through the adapter piece (5).

12. A battery pack, characterized in that, include: At least one battery as claimed in claim 11.

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