CN216563247U

CN216563247U - Battery and electronic device

Info

Publication number: CN216563247U
Application number: CN202123408900.4U
Authority: CN
Inventors: 张艺伟; 车佩佩; 翟玮; 张云龙
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: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-17
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a battery and an electronic device. In the present invention, a battery includes: the shell is provided with a positive pole column and a negative pole column; the battery cell is arranged in the shell, a positive tab of the battery cell is connected with the positive post, and a negative tab of the battery cell is connected with the negative post; the pair of metal caps are respectively covered on the positive pole column and the negative pole column and are respectively and electrically connected with the corresponding positive pole column and the corresponding negative pole column; and thermistors are arranged between the positive pole and the negative pole and the corresponding metal caps respectively, and the thermistors are electrically connected with the corresponding metal caps. Compared with the prior art, the battery shell has the advantages that the weight of the battery shell is reduced, the space of the internal pole core is increased, the energy density of the battery is improved, and the use danger of the battery is reduced.

Description

Battery and electronic device

Technical Field

The present invention relates to the field of batteries, and particularly to a battery and an electronic device.

Background

The battery is used as a recyclable green new energy product, the application field is increasingly wide, and meanwhile, as the environmental awareness of modern people is enhanced, more and more devices select the green recyclable battery as a power supply. In recent years, with the rapid development of new energy, the demand of power batteries has increased, and power batteries are generally divided into steel-shell power batteries and aluminum-shell power batteries according to battery shells. Among them, the aluminum-case power battery has become a main battery case due to its advantages of light weight, large capacity, less leakage, low cost, high energy density, etc. However, the conventional laminated aluminum-shell battery contains the interposer, and the thickness of the interposer limits the magnitude of current, which limits the high-rate charge and discharge of the battery. The adapter sheet occupies a large amount of space inside the battery, so that the volume energy density and the mass energy density of the battery are greatly reduced, and the production process of the battery is also complicated. In addition. When the traditional battery is used, if the internal of the battery is abnormal and the temperature is ultrahigh, the battery can be continuously charged, and danger is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery and an electronic device, which can reduce the weight of a battery shell, increase the space of an internal pole core, improve the energy density of the battery and reduce the use danger of the battery.

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

the battery comprises a shell, wherein a positive pole column and a negative pole column are arranged on the shell;

the battery cell is arranged in the shell, a positive electrode tab of the battery cell is connected with the positive electrode post, and a negative electrode tab of the battery cell is connected with the negative electrode post; and the number of the first and second groups,

the pair of metal caps are respectively covered on the positive pole column and the negative pole column and are respectively and electrically connected with the corresponding positive pole column and the corresponding negative pole column; thermistors are arranged between the positive pole and the negative pole and the corresponding metal caps respectively, and the thermistors are electrically connected with the corresponding metal caps.

In one embodiment, a plurality of thermistors are arranged between the positive pole and the corresponding metal cap; and a plurality of thermistors are arranged between the negative pole and the corresponding metal cover cap.

In one embodiment, the positive pole and the negative pole are prismatic, and the shape of each metal cap is matched with the corresponding positive pole or negative pole;

at least two of the thermistors arranged between the positive post and the corresponding metal cover cap are arranged opposite to different surfaces of the positive post;

at least two thermistors in the plurality of thermistors arranged between the negative pole and the corresponding metal cover cap are arranged opposite to different surfaces of the negative pole.

In one embodiment, each thermistor is connected with the corresponding metal cap in a welding mode.

In one embodiment, the thermistor is welded on the top surface of each metal cap; the thermistor is welded on at least any pair of opposite side walls of each metal cap.

In one embodiment, the positive post is welded with the corresponding metal cap; and the negative pole column is welded with the corresponding metal cap.

In one embodiment, the wall thickness of each metal cap ranges from 3mm to 5 mm.

In one embodiment, the positive post and the negative post are both disposed on a top surface of the housing;

the positive pole ear with the negative pole ear all faces the top surface direction vertical extension of shell, positive pole ear with positive post welding links to each other, the negative pole ear with negative pole post welding links to each other.

In one embodiment, the positive tab faces the positive post and the negative tab faces the negative post.

An embodiment of the present invention also provides an electronic device, including: a battery as claimed in any one of the preceding claims.

Compared with the prior art, the positive tab is directly connected with the positive post, the negative tab is directly connected with the negative post, the number of the switching pieces for connecting the positive post and the negative post is reduced, the production process of the battery can be greatly reduced, the weight of the battery can be reduced, the placing space of the battery core inside the shell is increased, and the volume energy density and the mass energy density of the battery are improved. In addition, through the arrangement of the thermistor, when the abnormal temperature in the battery is too high, the internal resistance of the thermistor is increased gradually, so that the battery cannot be charged continuously, the danger caused by damage of the battery due to overcharging is prevented, and the battery is safer to use.

Drawings

Fig. 1 is a schematic structural view of a battery according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a structure in which a metal cap is fitted over a positive post and a negative post according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a thermistor within a metal cap according to an embodiment of the utility model;

100, a battery; 1. a housing; 2. an electric core; 21. a positive tab; 22. a negative tab; 3. a metal cap; 4. a metal cap; 5. a positive post; 6. a negative pole post; 8. a thermistor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with 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.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present 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 purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

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

One embodiment of the present invention relates to a battery. As shown in fig. 1, 2 and 3, the battery 100 includes: the battery comprises a shell 1, a battery core 2 arranged in the shell 1 and a pair of

metal caps

3 and 4. The shell 1 is provided with a positive pole post 5 and a negative pole post 6, a positive pole tab 21 of the battery cell 2 is connected with the positive pole post 5, and a negative pole tab 22 of the battery cell 2 is connected with the negative pole post 6. The

metal caps

3 and 4 cover the positive pole posts 5 and the negative pole posts 6 respectively, the pair of

metal caps

3 and 4 are electrically connected with the corresponding positive pole posts 5 and the corresponding negative pole posts 6 respectively, the thermistors 8 are arranged between the positive pole posts 5 and the negative pole posts 6 and the corresponding metal caps respectively, and the thermistors 8 are electrically connected with the

corresponding metal caps

3 and 4. When the temperature of the

metal caps

3 and 4 is higher than 90 ℃, the internal resistance of the thermistor 8 corresponding to the

metal caps

3 and 4 increases, preventing further charging of the battery 100.

Through the above, it can be easily found that the positive tab 21 is directly connected to the positive post 5, and the negative tab 22 is directly connected to the negative post 6, so that the number of the switching pieces for connecting the positive post 5 and the negative post 6 is reduced, the production processes of the battery 100 can be greatly reduced, the weight of the battery 100 can be reduced, the placing space of the electric core 2 inside the housing 1 is increased, and the volume energy density and the mass energy density of the battery 100 are improved. In addition, by providing the thermistor 8, when the abnormal temperature in the battery 100 is too high, the internal resistance of the thermistor 8 increases, and the battery 100 cannot be charged continuously, so that the danger of damage to the battery 100 due to overcharge is prevented, and the use of the battery 100 is safer. Therefore, the thermistor 8 is connected to the positive electrode tab 5 and the negative electrode tab 6 without changing the internal structure of the battery 100, and the structure is simple and convenient.

Further, as shown in fig. 1, 2 and 3, the positive post 5 and the corresponding metal cap 3 have a plurality of thermistors 8 therebetween, and the negative post 6 and the corresponding metal cap 4 have a plurality of thermistors 8 therebetween.

In addition, as shown in fig. 1, 2, and 3, the positive and negative posts 5 and 6 are prism-shaped, and the

metal caps

3 and 4 are shaped to match the corresponding positive and negative posts 5 and 6. As shown in the figure, the positive pole post 5 and the negative pole post 6 are cuboids, and the metal cap 3 is sleeved on the positive pole post 5 and is a cuboid matched with the positive pole post 5; the metal cap 4 is sleeved on the negative pole 6 and is a cuboid matched with the negative pole 6. It is understood that in other embodiments, the positive and negative posts 5 and 6 may be square or cylindrical, etc. At least two thermistors 8 of the plurality of thermistors 8 arranged between the positive post 5 and the corresponding metal cap 3 are arranged opposite to different surfaces of the positive post 5. At least two thermistors 8 of the plurality of thermistors 8 arranged between the negative pole 6 and the corresponding metal cap 4 are arranged opposite to different surfaces of the negative pole 6.

As shown in fig. 1 and 2, each thermistor 8 is welded to its

corresponding metal cap

3 or 4.

Further, as shown in fig. 3, the thermistors 8 are welded to the top surfaces of the

metal caps

3 and 4, and the thermistors 8 are welded to at least any pair of opposite side walls of the

metal caps

3 and 4. The structure of the metal cap 4 with the thermistor 8 connected inside can be the same as that of fig. 3. It is understood that in other embodiments, the thermistor 8 can be welded to other parts of the

metal caps

3 and 4, and the thermistor 8 can also be welded to the positive pole 5 and the negative pole 6.

Further, as shown in fig. 1 and 2, the positive post 5 is connected with the corresponding metal cover 3 by cap welding; the negative pole column 6 is connected with the corresponding metal cap 4 in a welding way.

It is more worth mentioning that, as shown in fig. 1 and 2, the wall thickness of the metal cap 3 ranges from 3mm to 5 mm. The wall thickness of the metal cap 4 ranges from 3mm to 5 mm.

As shown in fig. 1 and 2, the positive electrode tab 5 and the negative electrode tab 6 are both provided on the top surface of the case 1. The positive tab 21 and the negative tab 22 extend vertically towards the top surface of the housing 1, the positive tab 21 is connected with the positive post 5 in a welding mode, and the negative tab 22 is connected with the negative post 6 in a welding mode. Therefore, the positive tab 21 can be directly connected to the positive post 5, and the negative tab 22 can be directly connected to the negative post 6 without changing the structure of the battery cell 2.

Further, as shown in fig. 1 and 2, positive tab 21 faces positive post 5, and negative tab 22 faces negative post 6.

Another embodiment of the present invention also relates to an electronic device including the battery as in the above embodiments. The electronic equipment can be vehicles such as automobiles and electric trains or other equipment needing batteries.

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 of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.

Claims

1. A battery, comprising:

2. The battery of claim 1, wherein a plurality of said thermistors are provided between said positive post and its corresponding said metal cap; and a plurality of thermistors are arranged between the negative pole and the corresponding metal cover cap.

3. The battery of claim 2, wherein the positive and negative posts are prismatic, and each metal cap is shaped to match its corresponding positive or negative post;

4. The battery of claim 3, wherein each thermistor is welded to its corresponding metal cap.

5. The battery of claim 4, wherein the thermistor is welded to the top surface of each metal cap; the thermistor is welded on at least any pair of opposite side walls of each metal cap.

6. The battery according to claim 1, wherein the positive post is welded to its corresponding metal cap; and the negative pole column is welded with the corresponding metal cap.

7. The battery of claim 1, wherein each metal cap has a wall thickness in a range of 3mm to 5 mm.

8. The battery of claim 1, wherein the positive post and the negative post are both disposed on a top surface of the housing;

9. The battery of claim 8, wherein said positive tab faces said positive post and said negative tab faces said negative post.

10. An electronic device, comprising: a battery as claimed in any one of claims 1 to 9.