CN219144433U

CN219144433U - Battery polar plate and battery

Info

Publication number: CN219144433U
Application number: CN202221670760.XU
Authority: CN
Inventors: 强健; 雷政军; 翟腾飞
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-06-06
Anticipated expiration: 2032-06-30

Abstract

The utility model provides a battery polar plate and a battery, which belong to the technical field of batteries and comprise a polar plate body and an electric connecting plate fixedly connected to the polar plate body, wherein the electric connecting plate is used for being electrically connected with a battery core lug of the battery. The electric connection plate is arranged on the battery polar plate, the electric connection plate can be stably and electrically connected with the battery core polar lug, the problem that the polar plate and the battery core polar lug are not easy to be fixedly and electrically connected is avoided, polar plate materials can be freely selected, the electric connection stability is improved, meanwhile, the cost can be greatly saved, the structure is simple, and the assembly is easy.

Description

Battery polar plate and battery

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a battery polar plate and a battery.

Background

The square battery with the maximum capacity of the lithium battery in the current market is about 300Ah, under the background of carbon peak and carbon neutralization, the energy storage industry is expected to develop in a long way, but the lithium battery is influenced by the battery capacity, and the lithium battery needs to be connected in series and parallel with a plurality of batteries when being used for energy storage, so that the connecting spare and accessory parts are numerous, the connecting steps are complex and complicated, and the consumption of a battery management system, wires and a battery box is very large, so that the energy storage cost is high. The improvement of the capacity of the battery has remarkable effect on solving the problems, but if the cover plate is used as the pole post of the battery with large capacity, the problems that the pole plate and the electrode lug of the battery core are not easy to fix and the electric connection is unreliable may exist.

CN114614171a discloses a battery assembly and a connection method of a tab and a cover plate, the battery assembly comprises a cover plate assembly and a battery core, the cover plate assembly comprises a cover plate, a pole column and a leading-out sheet, a first through hole is formed in the cover plate, the pole column penetrates out of one side of the cover plate to be arranged in the first through hole, the leading-out sheet is arranged on the other side of the cover plate, the leading-out sheet comprises a fixing section and a welding section, the fixing section is fixedly connected with one end of the pole column and is arranged in parallel with the cover plate, one end of the welding section is connected with one end of the fixing section and is folded with the fixing section so that the welding section is parallel with the cover plate, the battery core comprises the tab, and the pole column and the welding section are welded on one side of the fixing section. Similarly, the patent does not use the whole cover plate as a pole of the battery, and the problem that the pole plate and the battery core pole lug are not easy to fix and are not reliable in electric connection cannot be solved.

CN114628866a discloses a high energy density cylindrical battery and its assembling process, comprising a housing assembly, wherein the housing in the housing assembly is provided with an insulating part, a second confluence disc, a winding core, a first confluence disc and a cover plate from bottom to top in sequence, the insulating part insulates the second confluence disc from the housing, one side of the winding core is welded with the first confluence disc, the other side is welded with the second confluence disc, the lower part of the second confluence disc is welded with a pole integrally, the upper part of the pole is riveted with the bottom of the housing, and a cap is installed below the pole; the upper part of the first confluence disc is integrally welded with the shell and the cover plate. The application does not use the whole cover plate as a pole of a battery either, and the problem that the pole plate is not easy to fix and the electric core pole lug is unreliable in electric connection cannot be solved.

Disclosure of Invention

The utility model provides a battery polar plate and a battery, which are used for solving the problems that the battery polar plate and a battery core polar lug are not easy to fix and are unreliable in electric connection.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a battery polar plate comprises a polar plate body and an electric connecting plate fixedly connected to the polar plate body, wherein the electric connecting plate is used for being electrically connected with a battery core lug of a battery.

Preferably, the polar plate body is provided with an accommodating groove, and the electric connecting plate is inlaid in the accommodating groove.

Preferably, the electric connection surface of the electric connection plate and the inner surface of the polar plate body are in the same plane.

Preferably, the connection mode of the electric connection plate and the polar plate body is at least one of welding, bolting and interference fit connection.

Preferably, the electric connection plate and the battery cell tab are electrically connected through welding.

Preferably, the electric connection plate and the battery cell tab are electrically connected through laser welding or ultrasonic welding.

Preferably, the polar plate body is an aluminum plate, and the electric connection plate is a copper plate.

Preferably, the inner surface of the polar plate is provided with an anti-corrosion coating.

Preferably, the corrosion-resistant coating is a copper coating.

The utility model also provides a battery, which comprises the battery polar plate.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. the electric connection plate is arranged on the battery polar plate, the electric connection plate can be stably and electrically connected with the battery core polar lug, the problem that the polar plate and the battery core polar lug are not easy to be fixedly and electrically connected is avoided, polar plate materials can be freely selected, the electric connection stability is improved, meanwhile, the cost can be greatly saved, the structure is simple, and the assembly is easy.

2. The polar plate body is provided with the accommodating groove, the electric connecting plate is embedded in the accommodating groove, so that the internal space of the battery is saved, and the energy density is improved; the connection mode of the electric connection plate and the polar plate body is at least one of welding, bolting and interference fit connection, and the most suitable fixed connection mode can be selected according to the material of the polar plate, so that the stability of the structure is improved.

3. The electric connection surface of the electric connection plate and the inner surface of the polar plate body are positioned on the same plane, so that the inner surface of the polar plate is conveniently plated; the inner surface of the polar plate is provided with an anti-corrosion coating, which can protect the polar plate from being corroded by electrolyte and prolong the service life of the battery.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of a battery plate according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of a battery plate;

FIG. 3 is a third schematic diagram of a battery plate according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a battery plate according to an embodiment of the present utility model;

reference numerals: 1-polar plate body, 11-holding tank, 2-electric connection board, 3-bolt.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

Example 1

The embodiment provides a battery pole plate, which comprises a pole plate body 1 and an electric connection plate 2 fixedly connected to the pole plate body 1, wherein the electric connection plate 2 is used for being electrically connected with a battery core lug of a battery. In this embodiment, through set up the electric connection board on battery polar plate, the electric connection board can be connected with electric core tab stable electricity, has avoided polar plate and the difficult fixed electric problem of being connected of electric core tab, can select polar plate material more freely, can practice thrift the cost by a wide margin when improving electric connection stability, simple structure, easily assembly.

Example 2

As shown in fig. 1, the present embodiment provides a battery electrode plate, which includes an electrode plate body 1 and an electrical connection plate 2 fixedly connected to the electrode plate body 1, wherein the electrical connection plate 2 is used for electrically connecting with a battery core tab of a battery. The electrode plate body 1 is provided with a containing groove 11, the electric connection plate 2 is inlaid in the containing groove 11 in a brazing mode, and the electric connection surface of the electric connection plate 2 and the inner surface of the electrode plate body 1 are positioned on the same plane. In this embodiment, the plate body is an aluminum plate, and the electrical connection plate is a copper plate.

In the embodiment, the polar plate body is provided with the accommodating groove, and the electric connecting plate is embedded in the accommodating groove, so that the internal space of the battery is saved, and the energy density is improved; the electric connection plate is fixedly connected with the polar plate body in an interference fit mode, can be connected through bolts, can be fixedly connected through brazing, can be used together in various fixing modes, can select the most suitable fixing connection mode according to the material of the polar plate, and improves the stability of the connection structure.

Example 3

As shown in fig. 2, the present embodiment provides a battery electrode plate, which includes an electrode plate body 1 and an electrical connection plate 2 fixedly connected to the electrode plate body 1, wherein the electrical connection plate 2 is used for electrically connecting with a battery core tab of a battery. The polar plate body 1 is provided with a containing groove 11, the electric connection plate 2 is inlaid in the containing groove 11 in a bolt connection mode, and the electric connection surface of the electric connection plate 2 and the inner surface of the polar plate body 1 are positioned on the same plane. The inner surface of the whole polar plate is provided with an anti-corrosion coating, namely, the surfaces of the polar plate body 1 and the electric connecting plate 2 which are possibly contacted with electrolyte are provided with the anti-corrosion coating. In this embodiment, the plate body is an aluminum plate, the electric connection plate is a copper plate, and in order to prevent the electrolyte from corroding aluminum, a copper plating layer is used as an anti-corrosion plating layer.

In the embodiment, the electric connection surface of the electric connection plate and the inner surface of the polar plate body are positioned on the same plane, so that the inner surface of the polar plate is conveniently plated; the inner surface of the polar plate is provided with an anti-corrosion coating, which can protect the polar plate from being corroded by electrolyte and prolong the service life of the battery.

Example 4

As shown in fig. 3, the present embodiment provides a battery electrode plate, which includes an electrode plate body 1 and three electrical connection plates 2 fixedly connected to the electrode plate body 1, wherein the electrical connection plates 2 are used for electrically connecting with the battery core lugs of the battery. Three accommodating grooves 11 are formed in the pole plate body 1, the electric connection plates 2 are embedded in the accommodating grooves 11 in an interference fit connection mode, and the electric connection surfaces of the electric connection plates 2 and the inner surface of the pole plate body 1 are located on the same plane. The inner surface of the whole polar plate is provided with an anti-corrosion coating, namely, the surfaces of the polar plate body 1 and the electric connecting plate 2 which are possibly contacted with electrolyte are provided with the anti-corrosion coating. In this embodiment, the plate body is an aluminum plate, the electric connection plate is a copper plate, and in order to prevent the electrolyte from corroding aluminum, a copper plating layer is used as an anti-corrosion plating layer.

Example 5

As shown in fig. 4, the present embodiment provides a battery pole plate, which includes a pole plate body 1 and five electrical connection plates 2 fixedly connected to the pole plate body 1, wherein the electrical connection plates 2 are used for electrically connecting with the battery core lugs of the battery. Five accommodating grooves 11 are formed in the pole plate body 1, five electric connection plates 2 are embedded in the accommodating grooves 11 in an interference fit connection, bolt connection or brazing mode, and electric connection surfaces of the electric connection plates 2 and the inner surface of the pole plate body 1 are located on the same plane. The inner surface of the whole polar plate is provided with an anti-corrosion coating, namely, the surfaces of the polar plate body 1 and the electric connecting plate 2 which are possibly contacted with electrolyte are provided with the anti-corrosion coating. In this embodiment, the plate body is an aluminum plate, the electric connection plate is a copper plate, and in order to prevent the electrolyte from corroding aluminum, a copper plating layer is used as an anti-corrosion plating layer.

Example 6

This embodiment provides a battery including the battery plate in the above embodiments 1 to 3.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A battery plate, characterized by: the battery comprises a polar plate body and an electric connection plate fixedly connected to the polar plate body, wherein the electric connection plate is used for being electrically connected with a battery core lug of a battery; the inner surface of the polar plate body is provided with an anti-corrosion coating.

2. The battery plate of claim 1, wherein: the electrode plate body is provided with an accommodating groove, and the electric connecting plate is inlaid in the accommodating groove.

3. The battery plate of claim 1, wherein: and an electric connection surface of the electric connection plate, which is connected with the battery core lug of the battery, is positioned on the same plane with the inner surface of the polar plate body.

4. The battery plate of claim 2, wherein: the connection mode of the electric connection plate and the polar plate body is at least one of welding, bolting and interference fit connection.

5. The battery plate of claim 1, wherein: the electric connection plate and the battery cell tab are electrically connected through welding.

6. The battery plate of claim 5, wherein: the electric connection plate and the battery cell tab are electrically connected through laser welding or ultrasonic welding.

7. The battery plate of claim 1, wherein: the polar plate body is aluminum plate, the electric connecting plate is copper.

8. The battery plate of claim 1, wherein: the anti-corrosion coating is a copper coating.

9. A battery, characterized in that: a battery plate comprising the battery of any one of claims 1-8.