CN217334342U

CN217334342U - Battery, battery module and electronic equipment

Info

Publication number: CN217334342U
Application number: CN202220691480.0U
Authority: CN
Inventors: 单雪燕
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-30
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a battery, battery module and electronic equipment. The utility model discloses in, the battery includes: a housing; a winding core arranged in the shell; the first current collecting disc is arranged in the shell and is connected with a first tab of the winding core in a welding way; the first current collecting disc is provided with pins clamped between the side wall of the shell and the side wall of the winding core, and the pins, the shell and the corresponding areas of the pins are connected in a welding mode; and the high-temperature expansion piece is clamped between the pin and the side wall of the winding core. Compared with the prior art, the compact contact between the current collecting disc and the shell can be effectively ensured, so that the problems of laser welding penetration and cold welding are reduced, and the welding yield of products is improved.

Description

Battery, battery module and electronic equipment

Technical Field

The utility model relates to a battery technology field, in particular to battery, battery module and electronic equipment.

Background

In recent years, the appearance of new energy automobiles plays a great role in promoting social development and environmental protection, and a power battery pack is a rechargeable battery, is a power source of the new energy automobiles, and is widely applied to the field of the new energy automobiles. The full-lug cylindrical battery is one of important product forms of a new energy power battery, and has a large number of applications in new energy automobiles due to high energy density and low manufacturing cost. The full-lug cylindrical battery mainly adopts a lug flattening and current collecting disc welding process, namely, the lug of a cylindrical winding core is firstly kneaded into a plane, then the current collecting disc and the lug flattening plane are welded together in a laser welding mode, and then the current collecting disc is connected with a battery pole column or a shell together, so that the circuit connection of the winding core inside the battery, an external shell and the pole column is completed.

One of the mainstream methods for welding and connecting the shell and the current collecting disc together by adopting a laser penetration welding process has the advantages that the tightness of the contact between the two welding materials has a remarkable influence on the laser penetration welding effect, and the tighter the contact is, the better the laser penetration welding effect is. At present, due to the internal space limitation of a battery shell, a current collecting disc and a shell are usually lack of effective pressing measures, so that the problem of shell welding penetration or shell and current collecting disc false welding easily occurs when laser penetrates through welding, and the welding yield of a battery product is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery, battery module and electronic equipment for can effectively guarantee the in close contact between current collecting disc and casing, thereby reduce laser welding and wear and rosin joint problem, improve the welding goodness of product.

In order to solve the above technical problem, an embodiment of the present invention provides a battery, including:

a housing;

a winding core disposed within the housing;

the first current collecting disc is arranged in the shell and is connected with a first tab of the winding core in a welding way; the first current collecting disc is provided with pins clamped between the side wall of the shell and the side wall of the winding core, and the pins, the shell and the corresponding areas of the pins are connected in a welding mode; and the number of the first and second groups,

and the high-temperature expansion piece is clamped between the pin and the side wall of the winding core.

In one embodiment, the first current collecting disc is provided with a main body part arranged on the side of the first tab of the winding core, and the pin is formed by bending and extending the edge of the main body part.

In one embodiment, the high temperature expansion member is coated or attached to the sidewall of the winding core.

In one embodiment, the high temperature expansion member comprises one or more of a thermoplastic rubber, a bi-thermal metal, or a PET resin.

In one embodiment, the battery further comprises: a second collector plate disposed within the housing; the shell is provided with a pole column, and the second current collecting disc is connected with the pole column and the second pole ear of the winding core in a welding mode.

In one embodiment, the housing has a cover plate disposed opposite to the second pole ear, the pole is disposed on the cover plate, and an insulating pad is sandwiched between the pole and the cover plate.

In an embodiment, the second current collecting disc is arranged between the cover plate and the second pole lug of the winding core, and at least part of the second current collecting disc is opposite to the pole.

In one embodiment, an insulation sheet is clamped between the second current collecting disc and the cover plate.

An embodiment of the utility model provides a still battery module, include: a battery as claimed in any one of the preceding claims.

An embodiment of the utility model provides another electronic equipment, include: a battery as claimed in any one of the preceding claims.

The utility model discloses embodiment is for prior art, because first current collector dish has the pin of centre gripping between the lateral wall of shell and the lateral wall of core, and the pin has high temperature expansion piece with roll up the core between the centre gripping, toast through the high temperature and make high temperature expansion piece take place the inflation, and the high temperature expansion piece after the inflation is in the same place the pin of first current collector dish with the inseparable extrusion of shell, reducible follow-up penetrating welding from outside laser wears and the rosin joint problem, improves the welding goodness.

Drawings

Fig. 1 is a schematic view of a connection relationship between a pin, a high temperature expansion member, and a housing according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery according to an embodiment of the present invention;

100, a battery; 1. a housing; 11. a cover plate; 2. a high temperature expansion member; 3. a winding core; 32. a first tab; 4. a first manifold plate; 5. a pin; 6. a second collector plate; 7. a pole column; 8. an insulating pad.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

Embodiments of the present invention are described below with reference to the drawings.

The utility model discloses a first embodiment relates to a battery. As shown in fig. 1 and 2, the battery 100 includes: the winding device comprises a shell 1, a winding core 3 arranged in the shell 1, a first collecting disc 4 arranged in the shell 1 and a high-temperature expansion piece 2. The first current collecting disc 4 is connected with a first tab 32 of the winding core 3 in a welding mode, the first current collecting disc 4 is provided with a pin 5 clamped between the side wall of the shell 1 and the side wall of the winding core 3, and the pin 5 and the shell 1 are connected with the corresponding area of the pin 5 in a welding mode. The high temperature expansion element 2 is clamped between the pin 5 and the side wall of the reeling core 3. In this embodiment, the first tab is a negative tab, and the housing 1 is an aluminum or steel shell, which serves as a negative electrode of the battery.

According to the above, since the first current collecting disc 4 has the pin 5 clamped between the side wall of the housing 1 and the side wall of the winding core 3, and the high-temperature expansion piece 2 is clamped between the pin 5 and the winding core 3, the high-temperature expansion piece 2 expands through high-temperature baking, and the pin 5 of the first current collecting disc 4 and the housing 1 are tightly extruded by the expanded high-temperature expansion piece 2, so that the problems of welding penetration and false welding in subsequent laser penetration welding from the outside can be reduced, and the welding yield is improved.

Implementation details of the present embodiment are specifically described below, and the following description is provided only for the sake of understanding and is not necessary for implementing the present embodiment.

Further, as shown in fig. 1 and 2, the first current collecting plate 4 has a main body portion provided on the side of the winding core 3 where the first tab 32 is located, and the lead 5 is formed by bending and extending an edge of the main body portion. The top space in the shell 1 is saved, and meanwhile, the welding positioning between the first current collecting disc 4 and the pole ear of the winding core 3 is facilitated.

Further, as shown in fig. 1 and 2, the high temperature swelling member 2 is coated or attached on the sidewall of the winding core 3.

When in use, as shown in fig. 1 and fig. 2, the high temperature expansion piece 2 is uniformly coated or attached on the periphery of the side wall of the winding core 3, the first current collecting disc 4 is sleeved on the winding core 3, and the first current collecting disc 4 and the tab of the winding core 3 are welded together by laser welding. And then, the winding core 3 welded with the first collecting tray 4 is arranged in the shell 1 and is placed in a high-temperature environment for baking for 1-18 hours. And the baked high-temperature expansion piece 2 expands, the pin 5 of the first current collecting disc 4 and the shell 1 are tightly extruded together, laser is adopted to perform penetration welding from the outside of the shell 1, and the shell 1 and the first current collecting disc 4 are welded together, so that the conduction between the lug of the winding core 3 and the shell 1 is realized.

Further, as shown in fig. 1 and 2, the high temperature expansion member 2 includes one or more of thermoplastic rubber, dual heat metal, or PET resin. The high temperature expansion element 2 may be a coating or a solid, attachable element.

In addition, as shown in fig. 1 and 2, the battery further includes: and a second current collecting disc 6 arranged in the shell 1 is provided with a pole post 7 on the shell 1, and the second current collecting disc 6 is connected with the pole post 7 and a second pole post of the winding core 3 in a welding way. In this embodiment, the first tab is a negative tab, the second tab is a positive tab, and the terminal is a positive terminal.

Further, as shown in fig. 1 and 2, the housing 1 has a cover plate 11 disposed opposite to the second pole piece, the pole 7 is disposed on the cover plate 11, and the insulating pad 8 is sandwiched between the pole 7 and the cover plate 11.

In addition, as shown in fig. 1 and 2, the second collecting disk 6 is arranged between the cover plate 11 and the second pole ear of the winding core 3, and the second collecting disk 6 at least partially faces the pole 7.

Further, an insulating sheet is sandwiched between the second current collecting plate 6 and the cover plate 11.

The second embodiment of the present invention also relates to a battery module including the battery 100 according to the first embodiment. A plurality of batteries 100 may be connected in series to form a battery module.

The related technical details mentioned in the first embodiment are still valid in this embodiment, and the technical effects that can be achieved in the first embodiment can also be achieved in this embodiment, and are not described herein again in order to reduce the repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.

The third embodiment of the present invention also relates to an electronic device including the battery 100 according to the first embodiment. The electronic device may be a vehicle such as an automobile or a train, or other device requiring the battery 100.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims

1. A battery, comprising:

a housing;

a winding core disposed within the housing;

the first current collecting disc is arranged in the shell and is connected with a first tab of the winding core in a welding mode; the first current collecting disc is provided with pins clamped between the side wall of the shell and the side wall of the winding core, and the pins, the shell and the corresponding areas of the pins are connected in a welding mode; and the number of the first and second groups,

2. The battery of claim 1, wherein the first current collecting tray has a main body portion disposed at a side of the winding core where the first tab is located, and the lead is formed by bending and extending an edge of the main body portion.

3. The battery of claim 1, wherein the high temperature expansion member is coated or attached to the side wall of the jelly roll.

4. The battery of claim 1, wherein the high temperature expansion member comprises one of a thermoplastic rubber, a bi-thermal metal, or a PET resin.

5. The battery of claim 1, further comprising: a second collector plate disposed within the housing; the shell is provided with a pole column, and the second current collecting disc is connected with the pole column and the second pole ear of the winding core in a welding mode.

6. The battery of claim 5, wherein the housing has a cover plate disposed opposite the second terminal tab, the terminal tab is disposed on the cover plate, and an insulating pad is sandwiched between the terminal tab and the cover plate.

7. The battery of claim 6, wherein the second current collector disk is disposed between the cover plate and the second pole tab of the jellyroll, and the second current collector disk at least partially faces the pole tab.

8. The battery of claim 7, wherein an insulating sheet is sandwiched between the second current collecting plate and the cap plate.

9. A battery module, comprising: the battery according to any one of claims 1-8.

10. An electronic device, comprising: the battery according to any one of claims 1-8.