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 and an electric connecting sheet. The cover plate body is provided with a pole hole; the pole is at least partially arranged in the pole hole; the electric connecting piece comprises a body part and a convex part, the convex part is arranged towards the cover plate body in a convex manner, the body part is arranged around the periphery of the convex part, the top surface of the convex part is connected with the bottom surface of the pole in a welding manner, and in a first direction (L direction), the length L1 of the convex part and the length L2 of the body part meet the condition that L1 / L2 is greater than or equal to 0.4 and less than or equal to 1. According to the utility model, the lug boss of the electric connecting sheet is welded with the lower surface of the pole, the relationship between the length of the lug boss of the electric connecting sheet and the length of the body part is regulated and controlled, and the planeness of the lug boss is easy to control, so that the welding quality between the electric connecting sheet and the pole can be ensured; and the supporting strength and the over-current capability of the lug boss to the pole are ensured.

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 guidance and impetus of the new energy field policy at home and abroad, the battery industrialization is rapidly promoted, and the application client requirement of battery package is higher and higher.

[0003] In the battery assembly process, the pole post and the pole group are generally connected through the electric connecting sheet, however, the welding area of the pole post and the electric connecting sheet is large, the flatness of the electric connecting sheet is difficult to effectively control, and false welding is easy to occur, which causes welding failure, and leads to poor welding quality between the pole post and the electric connecting sheet. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a kind of battery cover plate subassembly, battery and battery package to solve the flatness between pole post and electric connecting sheet difficult to effectively control, lead to the problem of poor welding quality.

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

[0006] Cover plate body is provided with pole post hole;

[0007] Pole post is at least partially in the pole post hole;

[0008] Electric connecting sheet includes body part and protruding part, the protruding part is set up towards the cover plate body protruding, the body part is set around the outer periphery of the protruding part, the top surface of the protruding part and the bottom surface of the pole post are weldedly connected, along the first direction (L direction), the length L1 of the protruding part and the length L2 of the body part satisfy, 0.4≤L1 / L2≤1.

[0009] Secondly, the utility model further provides a kind of battery, comprising:

[0010] Shell is equipped with opening and at least one pole group arranged in the shell;

[0011] The battery cover plate subassembly described above, the cover plate body is covered and arranged at the opening of the shell, and the pole group is electrically connected with the pole post through the connecting sheet.

[0012] Thirdly, the utility model further provides a kind of battery package, comprising: at least one above-mentioned battery.

[0013] Beneficial effects: the utility model discloses the convex portion of electric connecting piece and the lower surface welding of pole, regulate and control the length between the length of the convex portion of electric connecting piece and the length of the body portion, easily control the flatness of the convex portion, thereby can guarantee the welding quality between electric connecting piece and pole, and guarantee the support strength and the flow capacity of the convex portion to pole. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the drawings needed in the specific embodiment or 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 for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 It is a structural schematic diagram of a battery cover plate assembly of the embodiment of the utility model;

[0016] Figure 2 It is a sectional view of a battery cover plate assembly of the embodiment of the utility model;

[0017] Figure 3 It is Figure 2 It is a partial enlarged schematic view of A;

[0018] Figure 4 It is Figure 3 It is a partial enlarged schematic view of B;

[0019] Figure 5 It is a partial enlarged schematic view of a battery cover plate assembly of another embodiment of the utility model;

[0020] Figure 6 It is Figure 5 It is a partial enlarged schematic view of C;

[0021] Figure 7 It is an explosion view of a battery cover plate assembly of the embodiment of the utility model;

[0022] Figure 8 It is a structural schematic diagram of an insulating piece of the embodiment of the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, cover plate body;101, mounting groove;102, flange portion;103, limiting column;2, pole;3, electric connecting piece;301, body portion;302, convex portion;303, second positioning hole;304, connecting portion;4, sealing piece;5, insulating piece;501, first positioning hole;6, reinforcing rib;7, insulating ring. 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 combination 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 combination with Figures 1 to 8 .

[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, an electric connecting sheet 3, a sealing piece 4 and an insulating piece 5.

[0028] Specifically, the cover plate body 1 is provided with a pole hole. The pole 2 is at least partially in the pole hole. The electric connecting sheet 3 comprises a body part 301 and a protruding part 302, the protruding part 302 is protrudingly arranged towards the cover plate body 1, the body part 301 is arranged around the outer periphery of the protruding part 302, the top surface of the protruding part 302 is weldedly connected with the bottom surface of the pole 2, along the first direction (L direction), the length L1 of the protruding part 302 and the length L2 of the body part 301 satisfy 0.4≤L1 / L2≤1.

[0029] The battery cover plate assembly provided by the embodiments of the utility model is welded by the protruding part 302 of the electric connecting sheet 3 and the lower surface of the pole 2, the relationship between the length of the protruding part 302 and the length of the body part 301 of the electric connecting sheet 3 is controlled, the flatness of the protruding part 302 is easily controlled, so that the welding quality between the electric connecting sheet 3 and the pole 2 can be guaranteed, and the support strength and the flow capacity of the protruding part 302 to the pole 2 are guaranteed.

[0030] Specifically, as shown in Figure 1 , the first direction is indicated by arrow L, the first direction is the length direction of the cover plate body 1, the second direction is indicated by arrow H, the second direction is also the up-down direction, and the third direction is indicated by arrow W. The lower end of the pole 2 is installed in the pole hole, and the upper end is exposed from the upper surface of the cover plate body 1. As shown in Figure 2 and Figure 7 , one end of the body part 301 is bent downward to form a connecting part 304, and the connecting part 304 is used for welding with the pole lug of the pole group.

[0031] It should be noted that the utility model discloses the length of the protruding portion 302 of the electric connecting sheet 3 is limited to the length of the body portion 301, which can avoid the situation that L1 / L2 is too small, resulting in low support strength of the protruding portion 302 to the pole 2 and insufficient flow capacity, and can also avoid the situation that L1 / L2 is too large, resulting in poor welding effect of the protruding portion 302 to the pole 2.

[0032] It should be noted that the utility model discloses the shape of the protruding portion 302 is not limited, and the protruding portion 302 can be of a regular shape such as a circle, a square or an ellipse according to requirements.

[0033] In one embodiment, as shown in Figure 3 the length L2 of the body portion 301 satisfies L2≥40mm, and 0.5≤L1 / L2≤0.9 is satisfied. When the length of the body portion 301 is large, the requirement for flatness is high, and therefore the welding effect of the body portion 301 to the pole 2 is poor. The utility model discloses that the protruding portion 302 with low flatness requirement is welded to the lower surface of the pole 2, which can ensure the welding quality between the electric connecting sheet 3 and the pole 2 and can ensure the support strength and flow capacity of the protruding portion 302 to the pole 2.

[0034] In one embodiment, as shown in Figure 3 and Figure 4 in the first direction (L direction), the top surface of the protruding portion 302 does not exceed the bottom surface of the pole 2. Since the top surface of the protruding portion 302 does not exceed the bottom surface of the pole 2, the requirement for flatness of the protruding portion 302 can be further reduced, and the side surface of the protruding portion 302 has a large space, the sealing member 4 is more easily compressed, the insulating member 5 and the sealing member 4 are easily installed, and interference with the insulating member 5 and the sealing member 4 does not occur, thereby facilitating improvement of the sealing performance. In addition, in the third direction (W direction), the top surface of the protruding portion 302 can also not exceed the bottom surface of the pole 2, further reducing the requirement for flatness of the protruding portion 302.

[0035] Further, in one embodiment, in the case where the top surface of the protruding portion 302 does not exceed the bottom surface of the pole 2, the length L1 of the protruding portion 302 and the length L2 of the body portion 301 satisfy 0.5≤L1 / L2≤1. Since the top surface of the protruding portion 302 does not exceed the bottom surface of the pole 2, the support strength of the protruding portion 302 to the pole 2 is small, and the flow capacity is also low. By further regulating the relationship between the length of the protruding portion 302 and the length of the body portion 301 of the electric connecting sheet 3, the support strength and flow capacity of the protruding portion 302 to the pole 2 can be ensured, the flatness of the protruding portion 302 can be easily controlled, and the welding quality between the electric connecting sheet 3 and the pole 2 can be ensured.

[0036] In one embodiment, as shown in Figure 3 andFigure 4 As shown, the battery cover plate assembly further comprises a sealing member 4. The sealing member 4 is arranged between the pole 2 and the pole hole. The sealing member 4 arranged between the pole 2 and the pole hole plays a sealing and insulating role.

[0037] It should be noted that the material of the sealing member 4 is not limited in the embodiments of the present application, for example, the sealing member 4 can adopt a conventional sealing member such as a fluororubber sealing member, a silica gel sealing member, etc. In addition, the materials of the insulating ring 7 and the insulating member 5 are not limited, for example, the insulating ring 7 and the insulating member 5 can both be made of plastic, wherein the insulating ring 7 is made of PPS+GF30% (polyphenylene sulfide added with 30% glass fiber), and the insulating member 5 is made of PP (polypropylene). The material of the cover plate body 1 is also not limited, for example, the cover plate body 1 can be made of aluminum and / or steel.

[0038] Further, in one embodiment, the sealing member 4 is in contact with the pole 2 and the electrically connecting sheet 3. The sealing member 4 is arranged between the pole 2 and the electrically connecting sheet 3 to realize sealing and insulation.

[0039] Further, in one embodiment, as shown in Figure 4 the side surface of the sealing member 4 is in contact with the circumferential side of the pole 2, and the side surface of the sealing member 4 is also in contact with the side surface of the protruding part 302 to realize overall sealing, so that the sealing effect is better and interference is avoided.

[0040] In some other embodiments, as shown in Figure 5 and Figure 6 in the first direction (L direction), the top surface of the protruding part 302 exceeds the bottom surface of the pole 2, so that better flow capacity and support strength with the pole 2 can be ensured. Specifically, the length L3 by which one side of the protruding part 302 exceeds the bottom surface of the pole 2 satisfies 0.5≤L3≤20mm. If L3 is too large, it is difficult to control the flatness of the protruding part 302, and if L3 is too small, the flow capacity and support strength are too low to meet the use requirements. In addition, in the third direction (W direction), the top surface of the protruding part 302 can also exceed the bottom surface of the pole 2 to further ensure better flow capacity and support strength with the pole 2.

[0041] Further, in one embodiment, in the case that the top surface of the protruding part 302 exceeds the bottom surface of the pole 2, the length L1 of the protruding part 302 and the length L2 of the body part 301 satisfy 0.4≤L1 / L2≤0.9. Since the top surface of the protruding part 302 exceeds the bottom surface of the pole 2, the requirement for flatness is higher. By further limiting the relationship between the length of the protruding part 302 and the length of the body part 301 of the electrically connecting sheet 3, the welding flatness can be better controlled, the welding quality between the electrically connecting sheet 3 and the pole 2 can be ensured, and the support strength and flow capacity of the protruding part 302 to the pole 2 can be ensured.

[0042] In one embodiment, as shown in Figure 1 the lower surface of the cover plate body 1 is provided with a mounting groove 101 in the first direction (L direction), and a pole hole passing through the mounting groove 101 in the second direction (H direction). As shown in Figure 3 and Figure 4 the cover plate body 1 is further provided with a flange portion 102 surrounding the pole hole and located inside the cover plate body 1.

[0043] Further, as shown in Figure 4 the insulating piece 5 is arranged in the mounting groove 101 and connected with the flange portion 102, and the insulating piece 5 is further provided with a through hole passing through the sealing piece 4. The protruding portion 302 is at least partially arranged in the mounting groove 101.

[0044] The mounting groove 101 is arranged on the lower surface of the cover plate body 1 in the first direction, and the insulating piece 5 and the protruding portion 302 are accommodated in the mounting groove 101, so that the electric connecting piece 3 and the pole 2 can be welded in the mounting groove 101, thereby reducing the occupied space of the electric connecting piece 3 and the insulating piece 5, improving the space utilization, and having higher energy sealing. The mounting groove 101 can also limit the insulating piece 5. The electric connecting piece 3 can be installed 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.

[0045] Further, as shown in Figure 1 and Figure 4 the battery cover plate assembly further comprises an insulating ring 7. The upper end of the pole 2 is sleeved in the insulating ring 7, and the pole 2 is connected with the flange portion 102 through the insulating ring 7. The top surface of the flange portion 102 is supported by the insulating ring 7 and the sealing piece 4, and the bottom surface is supported by the insulating piece 5. The insulating ring 7 and the insulating piece 5 jointly play an insulating effect. As shown in Figure 3 and Figure 4 the top of the flange portion 102 and the cover plate body 1 further form a containing groove containing the insulating ring 7. The mounting groove 101 covers the electric connecting piece 3 in the height direction of the cover plate body 1.

[0046] Since the protruding portion 302 is welded with the pole 2, and the insulating piece 5 is installed in the mounting groove 101 and abuts against the flange portion 102, there is a gap between the insulating piece 5 and the body portion 301.

[0047] In one embodiment, as shown in Figure 3 and Figure 4As shown, the bottom of the insulating piece 5 near the sealing piece 4 is provided with a plurality of reinforcing ribs 6, which are used to melt and fill the gap between the insulating piece 5 and the electric connecting sheet 3 when the convex part 302 is welded with the pole column 2. The bottom of the insulating piece 5 near the sealing piece 4 is provided with a plurality of reinforcing ribs 6, which melt when the convex part 302 is welded with the electric connecting sheet 3, and fill the gap between the insulating piece 5 and the body part 301 of the electric connecting sheet 3, thereby improving the supporting effect of the flange part 102 and avoiding the collapse of the flange part 102.

[0048] It should be noted that the structure of the reinforcing rib 6 is not limited in the embodiments of the utility model, and any existing structure can be selected as needed. Exemplarily, as shown in Figure 8 As shown, the bottom of the insulating piece 5 near the sealing piece 4 is provided with a plurality of reinforcing ribs 6, which are used to melt and fill the gap between the insulating piece 5 and the electric connecting sheet 3 when the convex part 302 is welded with the pole column 2. The bottom of the insulating piece 5 near the sealing piece 4 is provided with a plurality of reinforcing ribs 6, which melt when the convex part 302 is welded with the electric connecting sheet 3, and fill the gap between the insulating piece 5 and the body part 301 of the electric connecting sheet 3, thereby improving the supporting effect of the flange part 102 and avoiding the collapse of the flange part 102.

[0049] In one embodiment, as shown in Figure 7 As shown, the bottom of the insulating piece 5 near the sealing piece 4 is provided with a plurality of reinforcing ribs 6, which are used to melt and fill the gap between the insulating piece 5 and the electric connecting sheet 3 when the convex part 302 is welded with the pole column 2. The bottom of the insulating piece 5 near the sealing piece 4 is provided with a plurality of reinforcing ribs 6, which melt when the convex part 302 is welded with the electric connecting sheet 3, and fill the gap between the insulating piece 5 and the body part 301 of the electric connecting sheet 3, thereby improving the supporting effect of the flange part 102 and avoiding the collapse of the flange part 102.

[0050] After the electric connecting sheet 3 is welded with the pole column 2, the sealing piece 4 is compressed between the pole column 2 and the flange part 102, and the sealing piece 4 has elasticity and exerts a rebound force towards the flange part 102 and the pole column 2 after being compressed. The plurality of limiting columns 103 pass through the insulating piece 5 and are connected with the body part 301 of the electric connecting sheet 3, can bear the rebound force of the sealing piece 4, and reduce the rebound force of the sealing piece 4 acting on the weld joint between the convex part 302 and the pole column 2, thereby further improving the welding stability between the convex part 302 and the pole column 2. The plurality of limiting columns 103 can also limit the distance between the flange part 102 and the body part 301, and prevent the pole column 2 from being lifted upward after the sealing piece 4 is compressed.

[0051] Exemplarily, the mounting groove 101 is a rectangular groove, one limiting column 103 is arranged at each of the four corners of the groove bottom, the first positioning hole 501 is a through hole, and the second positioning hole 303 is a blind hole. The limiting column 103 passes through the first positioning hole 501 and is arranged in the second positioning hole 303. The limiting column 103 can be a ceramic column and has high strength and insulation.

[0052] In one embodiment, as shown in Figure 4As shown, the depth T of the mounting groove 101 satisfies 0.7mm≤T≤1mm. For example, the depth T of the mounting groove 101 is 0.7mm, 0.8mm, 1mm, etc. If the depth T of the mounting groove 101 is less than 0.7mm, the space utilization rate is not obviously improved, and if the depth T of the mounting groove 101 is greater than 1mm, the support strength of the cover plate body 1 is poor.

[0053] In one embodiment, as shown in Figure 4 As shown, the height H1 of the protruding portion 302 satisfies 0.1mm≤H1≤0.3mm. For example, the height H1 of the protruding portion 302 is 0.1mm, 0.2mm, 0.3mm, etc. If the height H1 of the protruding portion 302 is less than 0.1mm, the welding of the protruding portion 302 and the pole 2 is easily affected, and if the height H1 of the protruding portion 302 is greater than 0.3mm, the protruding portion 302 will occupy a large space.

[0054] According to the embodiments of the utility model, on the other hand, a battery is also provided, 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 with the pole 2 through the electric connecting sheet 3.

[0055] The battery provided by the embodiments of the utility model is welded through the protruding portion 302 of the electric connecting sheet 3 and the lower surface of the pole 2, the relationship between the length of the protruding portion 302 and the length of the body portion 301 of the electric connecting sheet 3 is controlled, the flatness of the protruding portion 302 is easily controlled, thereby the welding quality between the electric connecting sheet 3 and the pole 2 can be guaranteed, and the support strength and the overcurrent capacity of the protruding portion 302 to the pole 2 are guaranteed.

[0056] 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 welded with the electric connecting sheet 3.

[0057] It should be noted that the pole 2 is arranged in pairs, including a positive pole and a negative pole. The electric connecting sheet 3 corresponds to the pole 2 one by one. One of the electric connecting sheets 3 is connected with the positive pole and the positive tab of the pole group, and the other electric connecting sheet 3 is connected with the negative pole and the negative tab of the pole group.

[0058] As shown in Figure 1 As shown, a pair of poles 2 can be selected to be installed at opposite ends of the cover plate body 1 as needed, or one of the poles 2 can be installed on the cover plate body 1 and the other pole 2 can be installed on the shell. The specific arrangement can be selected according to actual needs, and the embodiments of the utility model do not make too many limitations.

[0059] According to the embodiments of the utility model, on the other hand, a battery is also provided, 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 with the pole 2 through the electric connecting sheet 3.

[0060] Since the battery pack comprises the above-mentioned battery, has the same effect with the battery, here will not repeat.

[0061] In one embodiment, the battery pack comprises a plurality of batteries, the plurality of batteries can be selected to be connected in series to form the battery pack, can also be selected to be connected in parallel to form the battery pack, or adopts the form of series-parallel combination to form the battery pack, for this, the embodiments of the utility model do not make more limit.

[0062] Although the embodiments of the utility model are described in combination 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 utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery cover assembly, characterized in that, include: The cover plate body (1) is provided with pole hole; The pole post (2) is at least partially inside the pole post hole; The electrical connector (3) includes a body portion (301) and a protrusion portion (302). The protrusion portion (302) is protruding towards the cover plate body (1). The body portion (301) is arranged around the outer periphery of the protrusion portion (302). The top surface of the protrusion portion (302) is welded to the bottom surface of the pole post (2). Along the first direction, the length L1 of the protrusion portion (302) and the length L2 of the body portion (301) satisfy 0.4≤L1 / L2≤1.

2. The battery cover assembly according to claim 1, characterized in that, The length L2 of the main body (301) satisfies L2≥40mm and 0.5≤L1 / L2≤0.

9.

3. The battery cover assembly according to claim 1, characterized in that, Along the first direction, the top surface of the protrusion (302) does not exceed the bottom surface of the pole post (2).

4. The battery cover assembly according to claim 3, characterized in that, The length L1 of the protrusion (302) and the length L2 of the body (301) satisfy the condition that 0.5 ≤ L1 / L2 ≤ 1.

5. The battery cover assembly according to claim 3, characterized in that, Also includes: A sealing element (4) is disposed between the pole post (2) and the pole post hole.

6. The battery cover assembly according to any one of claims 1 to 4, characterized in that, Also includes: A sealing element (4) is disposed between the pole post (2) and the pole post hole, and the sealing element (4) is in contact with the pole post (2) and the electrical connection piece (3).

7. The battery cover assembly according to claim 1, characterized in that, Along the first direction, the top surface of the protrusion (302) extends beyond the bottom surface of the pole post (2).

8. The battery cover assembly according to claim 7, characterized in that, The length L1 of the protrusion (302) and the length L2 of the body (301) satisfy the condition that 0.4 ≤ L1 / L2 ≤ 0.

9.

9. The battery cover assembly according to claim 6, characterized in that, The lower surface of the cover plate body (1) is provided with an installation groove (101) along the first direction, and the pole hole is provided along the second direction through the installation groove (101). The cover plate body (1) is also provided with a flange (102) surrounding the pole hole and located inside the cover plate body (1). The battery cover assembly also includes: An insulating component (5) is disposed in the mounting groove (101) and connected to the flange portion (102). The insulating component (5) is also provided with a through hole through which the sealing component (4) passes.

10. The battery cover assembly according to claim 9, characterized in that, The bottom of the insulating member (5) near the sealing member (4) is provided with a plurality of reinforcing ribs (6), which are used to melt when the protrusion (302) is welded to the pole (2) and fill the gap between the insulating member (5) and the body part (301).

11. The battery cover assembly according to claim 9, characterized in that, The bottom of the mounting groove (101) is provided with a plurality of limiting posts (103) spaced apart. The plurality of limiting posts (103) avoid the protrusion (302). The insulating component (5) is provided with a plurality of first positioning holes (501) corresponding to the plurality of limiting posts (103). The main body (301) is provided with a plurality of second positioning holes (303) corresponding to the plurality of limiting posts (103). The plurality of limiting posts (103) are respectively installed in the first positioning holes (501) and the second positioning holes (303).

12. The battery cover assembly according to claim 9, characterized in that, The depth T of the mounting groove (101) satisfies 0.7 mm ≤ T ≤ 1 mm.

13. The battery cover assembly according to claim 9, characterized in that, The height H1 of the protrusion (302) satisfies 0.1 mm ≤ H1 ≤ 0.3 mm.

14. 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 13, 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 electrical connection piece (3).

15. A battery pack, characterized in that, include: At least one battery as claimed in claim 14.

Images