Contact piece of battery pack

Abstract

The utility model discloses a contact piece of a battery pack, which comprises a contact end, a connecting end and a welding part, the connecting end is provided with a circular through hole, the welding part is arranged in the through hole, one end of the welding part is connected with the inner wall of the through hole, the contact piece is welded with a wire through the welding part, and the welding part can generate certain deformation during welding, so that the welding is convenient, and the service life of the contact piece is prolonged. Therefore, reliable contact between the connecting sheet and the wire is realized, and the yield of finished products is improved. Preferably, the utility model is integrally formed by punching, and the welding part and the connecting end are integrally arranged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery package technical field, concretely relates to a battery package's contact patch. BACKGROUND

[0002] The battery package is a whole unit assembled by a plurality of battery modules, is used for storing and providing electric energy, and the battery module includes a plurality of battery monomers and a connecting sheet connecting the plurality of battery monomers.The battery package includes a shell made of insulating material, the battery module is fixed in the shell, and the shell includes a plug-in part, a plurality of contact patches are arranged on the plug-in part, the contact patch and the connecting sheet are connected through a wire, when needing to charge or power the electric tool, the plug-in part is connected with the interface of the external charger or electric tool, and the circuit can be connected.

[0003] The existing contact patch is usually made of copper, aluminum or other metal materials and has conductivity.The existing contact patch is usually inserted on the shell first and then welded with the wire, and the existing contact patch is a flat sheet and has poor deformation capacity, so that the welding angle of the welding part and the wire is relatively tricky when welding, which not only affects the welding efficiency, but also may cause some welding points to fail to achieve the expected welding effect. SUMMARY

[0004] In order to overcome the defects of the prior art, the utility model provides a connecting sheet with better welding effect than the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a contact patch of a battery package, which includes a contact end, a connecting end and a welding part, a circular through hole is arranged on the connecting end, the welding part is arranged in the through hole, and one end of the welding part is connected with the inner wall of the through hole.

[0006] By welding the welding part and the wire, the welding part can be deformed to some extent when welding, which facilitates welding, reliably contacts the connecting sheet and the wire, and improves the yield of finished products.

[0007] As a further setting of the utility model, two welding parts are arranged in the through hole, and the two welding parts are mirror-symmetric along a mirror plane passing through the axis of the through hole.

[0008] The above-mentioned scheme reliably contacts the welding part and the wire and guarantees the welding effect.

[0009] As a further setting of the utility model, the welding part includes a head and a tail, the head is connected with the inner wall of the through hole through the tail, the head includes two side faces one adjoining with the tail and a side face two between the two side faces one, the side face one is an arc surface and is parallel with the inner wall of the through hole, the distance from the side face one to the axis of the through hole is greater than 3 / 5 of the radius of the through hole.

[0010] Adopting the above scheme, the welding part can be in reliable contact with the wire.

[0011] As a further setting of the utility model, the side face two is a plane, the side face two on the two welding parts is parallel with each other, the side face one and the side face two are connected through an arc transition surface.

[0012] Adopting the above scheme, the transition surface can prevent the utility model from being poked when being taken by workers, and preferably the distance between the side face two on the two welding parts is equal to the distance from the side face one to the inner wall of the through hole along the radial direction of the through hole.

[0013] As a further setting of the utility model, the length of the tail part of the tail accounts for 1 / 6-1 / 4 of the circumference of the through hole.

[0014] Adopting the above scheme, the connection strength of the welding part and the through hole is ensured, and the welding part is prevented from being broken during welding or actual use.

[0015] As a further setting of the utility model, the tail includes an arc connecting surface connecting the inner wall of the through hole and the side face one, and the middle part of the connecting surface is recessed towards the middle part of the tail.

[0016] Adopting the above scheme, the tail is convenient to bend.

[0017] As a further setting of the utility model, a buffer bridge is arranged between the contact end and the connecting end, the buffer bridge includes a parallel section and inclined sections arranged on both sides of the parallel section, and the included angle between the inclined sections and the parallel section is greater than 110°.

[0018] Adopting the above scheme, the buffer bridge enables the utility model to have a certain deformation capacity, can be deformed to a certain extent during welding, and is convenient for welding and subsequent assembly.

[0019] The utility model will be further described below with reference to the drawings. DRAWINGS

[0020] ATTACHMENT Fig. 1 It is the shell cooperation schematic view of the utility model embodiment and the battery pack;

[0021] ATTACHMENT Fig. 2 It is the utility model embodiment schematic view;

[0022] ATTACHMENT Fig. 3The utility model discloses a specific embodiment side view.

[0023] Contact end 1, connecting end 2, through -hole 21, welding portion 3, head 31, side one 311, side two 312, transition surface 313, tail 32, connecting surface 321, buffer bridge 4, parallel section 41, inclined section 42. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be described below in connection with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] In the description of the utility model, it is necessary to explain that, except special explanation, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like appear in the description, the indicated position or positional relationship is based on the position or positional relationship shown in the drawings, and only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the restriction of the utility model. In addition, if the terms "first", "second", "third" appear, they are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] The specific embodiments of the utility model are as follows Figs. 1-3 As shown in the figure.

[0027] A kind of contact patch of battery pack, including contact end 1, connecting end 2 and welding portion 3, connecting end 2 is equipped with circular through -hole 21, welding portion 3 is arranged in through -hole 21, one end of welding portion 3 is connected with the inner wall of through -hole 21. This embodiment is welded with wire by welding portion 3, welding portion 3 can produce certain deformation when welding, facilitate welding, reliable contact between connecting piece and wire, improve the yield of finished product. This embodiment is integrally stamping, and welding portion 3 is integrally arranged with connecting end 2.

[0028] Two welding portions 3 are equipped in through -hole 21, and two welding portions 3 are mirror image arranged along mirror plane passing through the axis of through -hole 21. Make welding portion 3 reliable contact with wire, guarantee welding effect.

[0029] The welding part 3 comprises a head part 31 and a tail part 32, the head part 31 is connected with the inner wall of the through hole 21 through the tail part 32, the head part 31 comprises two side faces one 311 and two side faces two 312, the side face one 311 is an arc surface and is parallel to the inner wall of the through hole 21, and the distance from the side face one 311 to the axis of the through hole 21 is greater than 3 / 5 of the radius of the through hole 21. The welding part 3 is reliably contacted with the wire.

[0030] The side face two 312 is a plane, the side face two 312 on the two welding parts 3 is parallel to each other, and the side face one 311 and the side face two 312 are connected through an arc transition surface 313. The transition surface 313 can prevent workers from being poked when taking, and the distance between the side face two 312 on the two welding parts 3 is equal to the distance from the side face one 311 to the inner wall of the through hole 21 along the radial direction of the through hole 21 in the embodiment.

[0031] The length of the tail part 32 from the tail part 32 of the through hole 21 to the length of the through hole 21 is 1 / 6-1 / 4 of the circumference of the through hole 21. The connection strength of the welding part 3 and the through hole 21 is ensured, and the welding part 3 is prevented from being broken during welding or actual use.

[0032] The tail part 32 comprises an arc connecting surface 321 connecting the inner wall of the through hole 21 and the side face one 311, and the middle part of the connecting surface 321 is recessed to the middle part of the tail part 32. The tail part 32 is bent conveniently.

[0033] The buffer bridge 4 is arranged between the contact end 1 and the connecting end 2, the buffer bridge 4 comprises parallel sections 41 and inclined sections 42 arranged on both sides of the parallel sections 41, and the included angle between the inclined sections 42 and the parallel sections 41 is greater than 110°. The buffer bridge 4 has a certain deformation capacity, can be deformed during welding, and is convenient for welding and subsequent assembly.

[0034] The utility model is not limited to the above-mentioned specific implementation, and the person skilled in the art can adopt other various specific implementation to implement the utility model according to the content disclosed by the utility model, or any design structure and idea adopting the utility model, simple change or change, all fall into the protection scope of the utility model.

Claims

1. A contact piece for a battery pack, characterized in that: The device includes a contact end, a connecting end, and a welding part. The connecting end has a circular through hole. The welding part is disposed inside the through hole, and one end of the welding part is connected to the inner wall of the through hole. Two welding parts are disposed inside the through hole. The two welding parts are mirror-symmetrical along a mirror plane passing through the axis of the through hole. Each welding part includes a head and a tail. The head is connected to the inner wall of the through hole through the tail. The head includes two side surfaces one that are adjacent to the tail and a side surface two located between the two side surfaces one. The side surface one is an arc-shaped surface and parallel to the inner wall of the through hole. The distance from the side surface one to the axis of the through hole is greater than 3 / 5 of the radius of the through hole.

2. The contact piece of a battery pack according to claim 1, characterized in that: The second side is a plane, and the second side on the two welded parts are parallel to each other. The first side and the second side are connected by an arc-shaped transition surface.

3. The contact piece of a battery pack according to claim 2, characterized in that: The length of the tail portion and the tail portion of the through hole accounts for 1 / 6 to 1 / 4 of the circumference of the through hole.

4. The contact piece of a battery pack according to claim 3, characterized in that: The tail portion includes an arc-shaped connecting surface that connects the inner wall of the through hole and the side surface, with the middle portion of the connecting surface recessed towards the middle portion of the tail portion.

5. A contact piece for a battery pack according to claim 1, 2, 3, or 4, characterized in that: A buffer bridge is provided between the contact end and the connection end. The buffer bridge includes a parallel section and inclined sections arranged on both sides of the parallel section. The angle between the inclined section and the parallel section is greater than 110°.

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