CN220400833U

CN220400833U - Battery and battery pack

Info

Publication number: CN220400833U
Application number: CN202321997642.4U
Authority: CN
Inventors: 阴济光; 杜建平; 李文成; 张旺; 苏家磊; 张兴
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2024-01-26
Anticipated expiration: 2033-07-26

Abstract

The utility model relates to the technical field of batteries, and discloses a battery and a battery pack, wherein the battery comprises: a housing; at least one partition plate arranged in the shell, the partition plate dividing the inner cavity of the shell into at least two accommodating cavities, each accommodating cavity having an opening, the partition plate having thermal conductivity; the first pole group and the second pole group are arranged in different accommodating cavities, the types of the first pole group and the second pole group are different, and the first pole group and the second pole group are adjacently arranged and transfer heat through the partition plate; and the cover plates are equal to the accommodating cavities in number and correspond to each other one by one, and are arranged at the openings of the accommodating cavities to seal the shell. According to the utility model, the inner cavity of the shell is divided into different accommodating cavities by the partition plates, and the two adjacent accommodating cavities are provided with the different types of pole groups, so that the hybrid battery is formed, when the battery works in a low-temperature environment, heat generated by the pole group with relatively fast heat generation is transferred to the other type of pole group through the partition plates, the other type of pole group is heated, and the low-temperature performance of the pole group is improved.

Description

Battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery and a battery pack.

Background

The battery is used for providing energy for the operation of electric automobiles and consumer electronic products, and the performance of the battery has a great influence on the overall performance of the product. In the prior art, the energy density and the electrical property of the battery can be improved to a certain extent by optimizing the battery materials, the structure, the modules, the whole package design and the like.

However, the pole groups contained in the battery case in the prior art are usually the same type of pole groups, and for lithium ion batteries with poor low-temperature performance, when the battery works in a low-temperature environment, the normal work of the battery is usually maintained by means of heating of an external heat source, so that the overall structure is complex, the weight is large, and the energy density of the battery is not beneficial to improvement.

Disclosure of Invention

In view of the above, the present utility model provides a battery and a battery pack to solve the problem of poor low temperature performance of the battery.

In a first aspect, the present utility model provides a battery comprising: a housing; at least one partition plate arranged in the shell, wherein the partition plate divides the inner cavity of the shell into at least two containing cavities, each containing cavity is provided with an opening, and the partition plate has thermal conductivity; a first pole group and a second pole group disposed in different ones of the receiving cavities, the first pole group being of a different type than the second pole group, the first pole group being disposed adjacent to the second pole group and transferring heat through the separator; and the cover plates are equal to the accommodating cavities in number and correspond to each other one by one, and the cover plates are arranged at the openings of the accommodating cavities so as to seal the shell.

The beneficial effects are that: the inner cavity of the shell is divided into different accommodating cavities by the partition plates, and different types of pole groups are arranged in the two adjacent accommodating cavities to form the hybrid battery, so that when the battery works in a low-temperature environment, the pole group with relatively fast heat generation can transfer heat generated by the battery to the other type of pole group through the partition plates, and the other type of pole group is heated, thereby improving the low-temperature performance of the pole group, reducing the arrangement of an external heating structure, simplifying the structure and reducing the weight of the whole battery; the first pole group and the second pole group share the same shell, so that the weight of the battery can be reduced, the weight of the battery is reduced, the two pole groups can be subjected to the working procedures of pre-charge formation and the like at the same time, the production and manufacturing time is greatly shortened, the production efficiency is improved, and the production cost is reduced.

In an alternative embodiment, the openings of adjacent two of said receiving chambers are oppositely directed.

The beneficial effects are that: the types of the pole groups installed in the two adjacent containing cavities are different, the directions of the openings of the two adjacent containing cavities are opposite, powder falling from one pole group in the battery assembling process can be prevented from entering the other containing cavity as foreign matters to pollute the other pole group, poor pollution is avoided, the safety of the battery is improved, and the pole groups are convenient to install in the shell through the openings.

In an alternative embodiment, the housing cavity includes a first housing cavity in which the first pole set is disposed and a second housing cavity in which the second pole set is disposed.

The beneficial effects are that: the first chamber that holds and the second chamber that holds separate through the baffle, guarantee that first utmost point group and second group can not direct contact each other, the first size that holds chamber, second hold the chamber is divided according to the demand of first utmost point group, second group, satisfies the actual demand of battery production, and the practicality is high and the security is good. Specifically, one of the lithium battery pole group or the sodium battery pole group can be arranged in the first accommodating cavity, and the other one of the lithium battery pole group or the sodium battery pole group can be arranged in the second accommodating cavity.

In an alternative embodiment, the number of the partition plates is one, and one partition plate divides the inner cavity of the housing into one first accommodating cavity and one second accommodating cavity.

The beneficial effects are that: simple structure, and can satisfy the design demand of hybrid battery.

In an alternative embodiment, the number of the partition boards is at least two, at least two partition boards divide the shell into at least three containing cavities, and at least three containing cavities comprise the first containing cavity and the second containing cavity which are sequentially and circularly arranged.

The beneficial effects are that: the shell is divided into at least three accommodating cavities through at least two clapboards, and at least three pole groups can be accommodated in the shell, so that the capacity of the battery can be increased by simultaneously arranging a plurality of pole groups in one battery, and the plurality of pole groups share one shell, so that the whole weight of the battery can be reduced, and the weight of the battery can be reduced.

In an alternative embodiment, the first pole group is a lithium battery pole group and the second pole group is a sodium battery pole group; and/or the first pole group and the second pole group are lithium battery pole groups with different types; and/or the first pole group and the second pole group are sodium battery pole groups with different types.

The beneficial effects are that: when the working environment temperature is lower, the heat generated by the working of the sodium battery pole group can be used for heating the lithium battery pole group, so that the temperature rising rate of the lithium battery pole group is accelerated, the working environment of the lithium battery pole group is improved, and the low-temperature performance of the lithium battery pole group is improved; the first pole group and the second pole group are arranged as different types of lithium battery pole groups, and the other pole group is heated by the heat generated by the pole group with faster heating under a low-temperature environment, so that the low-temperature performance of the battery can be improved; by arranging the first pole group and the second pole group as different types of sodium battery pole groups, the other pole group is heated by the heat generated by the pole group which generates heat faster in a low-temperature environment, and the low-temperature performance of the battery can be improved.

In an alternative embodiment, the battery further comprises: and each containing cavity is correspondingly provided with an explosion-proof valve, and each explosion-proof valve is positioned on the same side of the shell.

The beneficial effects are that: the explosion-proof valve is correspondingly arranged on each accommodating cavity, so that the safety of each accommodating cavity is ensured, and the overall safety of the battery is ensured; and through setting up each explosion-proof valve and being located the same side of casing, when guaranteeing that the electricity core takes place thermal runaway, all explosion-proof valves open the pressure release in same side, the design of structure in the follow-up battery package of being convenient for, guarantees the timely emission of the inside gas of battery, further guarantees the safety of battery.

In an alternative embodiment, the cover plate corresponding to the first accommodating cavity is provided with the explosion-proof valve, the explosion-proof valve corresponding to the second accommodating cavity is arranged on a first side wall of the shell, and the first side wall and the opening of the first accommodating cavity are located on the same side of the shell.

The beneficial effects are that: the explosion-proof valves corresponding to different accommodating cavities face the same direction, so that the pressure relief of the different explosion-proof valves on the same side of the battery is realized.

In an alternative embodiment, the battery further comprises: and each containing cavity is correspondingly provided with a group of pole assemblies, and each group of pole assemblies are arranged on the surface of the shell or the cover plate and are electrically connected with the corresponding pole groups in the containing cavity.

The beneficial effects are that: the pole assembly is used for being connected with an external circuit or other batteries, and each accommodating cavity is correspondingly provided with a group of pole assemblies, so that the pole assemblies in different accommodating cavities are independently connected with the outside, and the independence is good.

In a second aspect, the present utility model also provides a battery pack comprising: the battery described above. Since the battery pack includes the battery, it has the same effect as the battery, and is not described herein.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic structural diagram of a housing according to an embodiment of the utility model.

Reference numerals illustrate:

1. a housing; 101. a first housing; 102. a second housing; 103. a first opening; 104. a second opening; 2. a partition plate; 3. an explosion-proof valve; 4. a cover plate; 5. a positive electrode post; 6. and a negative electrode column.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

An embodiment of the present utility model is described below with reference to fig. 1 to 2.

According to an embodiment of the present utility model, in one aspect, there is provided a battery including: the device comprises a housing 1, at least one partition plate 2, a first pole group and a second pole group and a cover plate 4.

Specifically, a partition plate 2 is provided in the housing 1, the partition plate 2 dividing the inner cavity of the housing 1 into at least two accommodation cavities, each accommodation cavity having an opening, the partition plate 2 having thermal conductivity; the first pole group and the second pole group are arranged in different accommodating cavities, the types of the first pole group and the second pole group are different, and the first pole group and the second pole group are adjacently arranged and transfer heat through the partition plate 2; the cover plates 4 are equal to the accommodating cavities in number and correspond to each other one by one, and the cover plates 4 are arranged at the openings of the accommodating cavities so as to seal the shell 1.

According to the battery, the inner cavity of the shell 1 is divided into different accommodating cavities by the partition plate 2, and different types of pole groups are arranged in the two adjacent accommodating cavities to form the hybrid battery, so that when the battery works in a low-temperature environment, the pole group with relatively fast heat generation can transfer heat generated by the battery to the other type of pole group through the partition plate 2, the heating of the other type of pole group is realized, the low-temperature performance of the pole group is improved, an external heating structure is reduced, the structure is simplified, and the weight of the whole battery is reduced; the first pole group and the second pole group share the same shell 1, so that the weight of the battery can be reduced, the weight of the battery is reduced, the two pole groups can be subjected to the procedures of pre-charge formation and the like at the same time, the production and manufacturing time is greatly shortened, the production efficiency is improved, and the production cost is reduced.

It should be noted that, for the polar groups with different low-temperature performances, when the battery works in an environment with lower temperature, the heat generated by the polar group with faster heating is transferred to the polar group with another type through the partition board 2, so as to realize external heating of the polar group with another type, improve the heating rate, improve the working environment temperature and the electrical performance of the polar group, and achieve the complementary advantages of the polar groups with different types; the two pole groups refer to a first pole group and a second pole group, and because the two pole groups are arranged in the same shell 1, the two pole groups can be simultaneously subjected to working procedure operations such as pre-charge formation and the like by simultaneously connecting circuits corresponding to the first pole group and the second pole group on one battery.

Specifically, the partition board 2 is a shell wall which is located in the shell 1 and is common to the first pole group and the second pole group, plays a role of partition, has good heat conducting performance, and can be made of aluminum plates and the like.

In one embodiment, the first pole set is a lithium battery pole set and the second pole set is a sodium battery pole set. It should be noted that, the lithium ion battery has the defects of poor low-temperature performance, higher price and the like, when the working environment temperature is lower, the dynamic performance of the lithium ion battery is lower, and when the lithium ion battery is in a low-temperature environment with poor performance, the performance of the sodium ion battery is better than that of the lithium battery, at the moment, the heat generated by the operation of the sodium battery pole group can be utilized to heat the lithium battery pole group, the temperature rising rate of the lithium battery pole group is accelerated, and the working environment of the lithium battery pole group is improved, so that the low-temperature performance of the lithium battery pole group is improved. The two electrode groups share the separator 2, so that under the low-temperature condition, the heat of the sodium battery electrode group can be transferred to the lithium battery electrode group as soon as possible, and the heating rate of the lithium battery electrode group is improved. Specifically, at normal temperature, the battery mainly takes a lithium battery pole group as a main source to provide energy for equipment; when the temperature is lower, the dynamic performance of the lithium battery pole group is reduced, the impedance is increased, when the output power can not meet the normal operation of the equipment, the sodium ion pole group is used as a main energy source to provide energy for the equipment, meanwhile, the heat generated by the sodium ion pole group is transmitted to the lithium battery pole group through the partition plate 2 to heat the lithium battery pole group, the temperature rising rate of the lithium battery pole group is accelerated, the performance of the lithium battery pole group is improved, and then the heat and the sodium battery pole group jointly provide energy for the equipment after the temperature of the lithium battery pole group is raised.

In addition, in other embodiments, the first pole group and the second pole group may also be different types of lithium battery pole groups. It should be noted that, the lithium battery is divided into different types such as a ternary battery and a lithium iron phosphate battery, and the performances of the lithium batteries of different types are different, and the first electrode group and the second electrode group are set to be different types of lithium battery electrode groups, so that the other electrode group is heated by the heat generated by the electrode group with faster heating under the low-temperature environment, and the low-temperature performance of the battery can be improved.

In addition, in other embodiments, the first pole set and the second pole set may also be different types of sodium battery pole sets. Similarly, the performances of the sodium batteries of different types are also different in a low-temperature environment, and the low-temperature performance of the battery can be improved by setting the first pole group and the second pole group as the sodium battery pole groups of different types and heating the other pole group through heat generated by the pole group which generates heat faster in the low-temperature environment.

Of course, the first pole group and the second pole group can be other pole groups of different types, and the heating of one pole group to the other pole group can be realized in a low-temperature environment.

In one embodiment, the openings of adjacent two receiving chambers are oppositely oriented. The types of the pole groups installed in the two adjacent containing cavities are different, the directions of the openings of the two adjacent containing cavities are opposite, powder falling from one pole group in the battery assembling process can be prevented from entering the other containing cavity as foreign matters to pollute the other pole group, poor pollution is avoided, the safety of the battery is improved, and the pole groups are convenient to install in the shell 1 through the openings. Specifically, the openings of the adjacent two accommodation chambers are located on opposite sides of the housing 1.

In addition, in other embodiments, the openings of the two adjacent accommodating chambers may also be located on two adjacent side surfaces on the housing 1, where the openings of the two adjacent accommodating chambers are oriented in different directions, and cross contamination between different pole groups can be avoided.

In one embodiment, the housing cavity includes a first housing cavity in which the first pole set is disposed and a second housing cavity in which the second pole set is disposed. The first chamber that holds and the second chamber that holds separate through baffle 2, guarantee that first utmost point group and second group can not direct contact each other, the size in first chamber, second chamber that holds is divided according to the demand of first utmost point group, second group, satisfies the actual demand of battery production, and the practicality is high and the security is good. Specifically, one of the lithium battery pole group or the sodium battery pole group can be arranged in the first accommodating cavity, and the other one of the lithium battery pole group or the sodium battery pole group can be arranged in the second accommodating cavity.

In one embodiment, the number of the partition boards 2 is one, one partition board 2 divides the inner cavity of the shell 1 into a first accommodating cavity and a second accommodating cavity, the structure is simple, and the design requirement of the hybrid battery can be met. Specifically, the casing 1 is divided into a first casing 101 and a second casing 102 by the partition board 2, the first casing 101 and the second casing 102 share one partition board 2, the inner cavity of the first casing 101 is a first accommodating cavity, the inner cavity of the second casing 102 is a second accommodating cavity, the first casing 101 is provided with a first opening 103, the second casing 102 is provided with a second opening 104, wherein the first opening 103 and the second opening 104 are positioned on different sides of the casing 1 to face different directions, powder falling in the process of installing the pole group into the accommodating cavity is prevented from polluting the other pole group, and preferably, the first opening 103 and the second opening 104 are positioned on two opposite sides of the casing 1, so that the directions of the first opening 103 and the second opening 104 are opposite. Specifically, a cover plate 4 is respectively disposed at the first opening 103 and the second opening 104, and the cover plate 4 is fixedly connected with the housing 1 to close the first accommodating cavity and the second accommodating cavity, so as to maintain the overall tightness of the battery.

In one embodiment, the number of the partition boards 2 is at least two, the at least two partition boards 2 divide the housing 1 into at least three accommodating chambers, and the at least three accommodating chambers comprise a first accommodating chamber and a second accommodating chamber which are sequentially and circularly arranged. The separator 2 located at the edge and the side wall of the shell 1 form a containing cavity, a containing cavity is formed between every two separators 2 located in the middle, each containing cavity contains a type of pole group, the shell 1 is divided into at least three containing cavities through at least two separators 2, and at least three pole groups can be contained in the shell 1, so that the capacity of the battery can be increased by simultaneously arranging a plurality of pole groups in one battery, the whole weight of the battery can be reduced by sharing one shell 1 by the plurality of pole groups, and the weight of the battery is reduced. Specifically, when the number of the partition boards 2 is at least two, the housing 1 divided by the partition boards 2 is in a circulating structure form of the first housing 101, the second housing 102 and the first housing 101 and … …, correspondingly, at least three accommodating cavities are a first accommodating cavity, a second accommodating cavity, a first accommodating cavity and … … in sequence, namely, two adjacent accommodating cavities are different accommodating cavities, and pole groups installed in the two adjacent accommodating cavities are different types of pole groups, so that heating of one pole group to the other pole group during low-temperature operation is realized, and the low-temperature performance of the battery is improved.

In one embodiment, the battery further comprises: explosion-proof valve 3, every holds the chamber and corresponds and be provided with explosion-proof valve 3 and each explosion-proof valve 3 is located the same side of casing 1. When the air pressure in the battery is greater than a certain pressure value, the explosion-proof valve 3 is opened to discharge high-temperature smoke in the battery, so as to prevent the explosion of the battery. The safety of each accommodating cavity is ensured by correspondingly arranging the explosion-proof valve 3 on each accommodating cavity, so that the overall safety of the battery is ensured; and, through setting up each explosion-proof valve and being located the same side of casing 1, when guaranteeing that the electricity core takes place thermal runaway, all explosion-proof valves 3 open the pressure release in same side, the design of structure in the follow-up battery package of being convenient for, guarantees the timely emission of the inside gas of battery, further guarantees the safety of battery.

Specifically, the number of the explosion-proof valves 3 corresponding to each accommodating cavity can be one or more, and the design can be carried out according to the actual requirement of the battery.

In one embodiment, the cover plate 4 corresponding to the first accommodating cavity is provided with the explosion-proof valve 3, the explosion-proof valve 3 corresponding to the second accommodating cavity is arranged on the first side wall of the shell 1, the opening of the first side wall and the opening of the first accommodating cavity are positioned on the same side of the shell 1, the cover plate 4 at the opening of the second accommodating cavity is not provided with the explosion-proof valve 3, the explosion-proof valves 3 corresponding to different accommodating cavities are oriented in the same direction, and accordingly the pressure relief is opened on the same side of the battery by different explosion-proof valves 3. The first side wall is a wall surface on the housing 1 and is located on the same plane with the first opening 103 of the first accommodating cavity.

In addition, in other embodiments, the explosion-proof valve 3 may be disposed on other side walls of the housing 1, where the cover plate 4 is not disposed, and it is only necessary to ensure that the explosion-proof valves 3 corresponding to different accommodating chambers are on the same surface.

In one embodiment, the battery further comprises: each accommodating cavity is correspondingly provided with a group of pole assemblies, and each group of pole assemblies is arranged on the surface of the shell 1 or the cover plate 4 and is electrically connected with the corresponding pole group in the accommodating cavity. The pole assembly is used for being connected with an external circuit or other batteries, and each accommodating cavity is correspondingly provided with a group of pole assemblies, so that the pole assemblies in different accommodating cavities are independently connected with the outside, and the independence is good.

Specifically, the post assembly includes a positive post 5 and a negative post 6. Preferably, the post assembly is provided on the cap plate 4 to facilitate assembly of the battery. Preferably, the cover plate 4 at the first opening 103 is provided with both the positive electrode post 5 and the negative electrode post 6 and the explosion-proof valve 3.

According to an embodiment of the present utility model, in another aspect, there is also provided a battery pack including: the battery described above.

In the present embodiment, the different pole groups are mounted in the same case 1 to form a hybrid battery, and the adjacent two pole groups share one separator 2, so that the battery can be reduced in weight.

In this embodiment, different types of electrode groups in the same battery can be different types of lithium battery electrode groups, also can be different types of sodium battery electrode groups, also can be different types of lithium battery electrode groups and sodium battery electrode groups, and has the advantages of multiple selectivities, convenience in assembly, capability of optimizing heat production and heating of the battery, capability of improving low-temperature performance of the battery, capability of simultaneously carrying out procedures such as pre-charge formation on different electrode groups, and the like, thereby greatly shortening the time of production and manufacture and improving the production efficiency.

Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.

Claims

1. A battery, comprising:

a housing;

at least one partition plate arranged in the shell, wherein the partition plate divides the inner cavity of the shell into at least two containing cavities, each containing cavity is provided with an opening, and the partition plate has thermal conductivity;

a first pole group and a second pole group disposed in different ones of the receiving cavities, the first pole group being of a different type than the second pole group, the first pole group being disposed adjacent to the second pole group and transferring heat through the separator;

and the cover plates are equal to the accommodating cavities in number and correspond to each other one by one, and the cover plates are arranged at the openings of the accommodating cavities so as to seal the shell.

2. The battery of claim 1, wherein the openings of adjacent two of the receiving chambers are oppositely oriented.

3. The battery of claim 1, wherein the housing cavity comprises a first housing cavity in which the first pole set is disposed and a second housing cavity in which the second pole set is disposed.

4. A battery according to claim 3, wherein the number of the separators is one, and one of the separators divides the inner cavity of the case into one of the first accommodation cavities and one of the second accommodation cavities.

5. The battery of claim 3, wherein the number of separators is at least two, at least two of the separators divide the case into at least three of the accommodation chambers, and at least three of the accommodation chambers include the first accommodation chamber and the second accommodation chamber which are disposed in a circulating manner in this order.

6. The battery of claim 1, wherein the first pole set is a lithium battery pole set and the second pole set is a sodium battery pole set;

and/or the first pole group and the second pole group are lithium battery pole groups with different types;

and/or the first pole group and the second pole group are sodium battery pole groups with different types.

7. The battery of claim 3, wherein the battery further comprises: and each containing cavity is correspondingly provided with an explosion-proof valve, and each explosion-proof valve is positioned on the same side of the shell.

8. The battery of claim 7, wherein the cover plate corresponding to the first accommodating cavity is provided with the explosion-proof valve, the explosion-proof valve corresponding to the second accommodating cavity is arranged on a first side wall of the housing, and the first side wall and an opening of the first accommodating cavity are located on the same side of the housing.

9. The battery according to any one of claims 1 to 8, characterized in that the battery further comprises: and each containing cavity is correspondingly provided with a group of pole assemblies, and each group of pole assemblies are arranged on the surface of the shell or the cover plate and are electrically connected with the corresponding pole groups in the containing cavity.

10. A battery pack, comprising: the battery of any one of claims 1 to 9.