CN221447437U - Energy storage battery structure and battery pack - Google Patents

Abstract

The application discloses an energy storage battery structure and a battery pack, and relates to the technical field of zinc ion batteries, wherein the energy storage battery structure comprises: the battery cell assembly comprises a shell, a cover plate assembly, a battery cell assembly and a liquid storage assembly, wherein the top surface of the shell is of an opening structure, the cover plate assembly comprises a cover plate main body, a pole assembly and a one-way ventilation valve, the pole assembly and the one-way ventilation valve are arranged on the cover plate main body, the cover plate assembly covers the shell to form a first cavity, electrolyte is arranged in the first cavity, and the one-way ventilation valve is communicated with the first cavity and the outside air; the battery cell assembly is arranged in the first cavity, the battery cell assembly is soaked in electrolyte, the battery cell assembly is electrically connected with the pole assembly, and a second cavity is formed between the battery cell assembly and the cover plate assembly; the liquid storage component is arranged in the second cavity, electrolyte is stored in the liquid storage component, and the side surface of the liquid storage component is arranged at intervals with the pole component; the stability against battery gassing can be increased.

Description

Energy storage battery structure and battery pack

Technical Field

The application relates to the technical field of zinc ion batteries, in particular to an energy storage battery structure and a battery pack.

Background

The zinc ion battery is used as a novel energy storage system, and has the advantages of low cost, high safety and high energy density. Although the water-based zinc battery has the advantage that the lithium battery cannot be made up intrinsically, as the pole piece needs to be soaked in the electrolyte, the theoretical decomposition voltage window of water is narrower for the water-based electrolyte, and in the related technology, the normal use of the water-based zinc ion battery is also seriously affected by the decomposition reaction, so that the electrolyte is converted into gas by decomposition, a large amount of gassing phenomenon occurs, and the electric energy is consumed, the precipitated gas deforms the pole plate, the electrolyte is easily lacked in the battery core, and the normal use of the battery is affected.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides an energy storage battery structure which can increase the stability of battery gassing.

The application further provides a battery pack with the energy storage battery structure.

An energy storage cell structure according to an embodiment of the first aspect of the present application includes: the battery cell assembly comprises a shell, a cover plate assembly, a battery cell assembly and a liquid storage assembly, wherein the top surface of the shell is of an opening structure, the cover plate assembly comprises a cover plate main body, a pole assembly and a one-way ventilation valve, the pole assembly and the one-way ventilation valve are arranged on the cover plate main body, the cover plate assembly covers the shell to form a first cavity, electrolyte is arranged in the first cavity, and the one-way ventilation valve is communicated with the first cavity and the outside air; the battery cell assembly is arranged in the first cavity, the battery cell assembly is soaked in electrolyte, the battery cell assembly is electrically connected with the pole assembly, and a second cavity is formed between the battery cell assembly and the cover plate assembly; the liquid storage component is arranged in the second cavity, electrolyte is stored in the liquid storage component, and the side face of the liquid storage component is arranged at intervals with the pole component.

The energy storage battery structure provided by the embodiment of the application has at least the following beneficial effects:

In the charge and discharge process of the energy storage battery structure, the electric core component is required to be soaked in electrolyte, the electrolyte can generate hydrogen evolution and oxygen evolution phenomena in the charge and discharge process, the electrolyte is consumed, the electrolyte stored in the liquid storage component can be timely supplemented into the electric core component, so that the zinc ion battery can not influence normal operation due to the oxygen evolution phenomena, and generated gas can be diffused into the atmosphere through the unidirectional ventilation valve, so that the bulge of the energy storage battery structure is avoided, and the influence of the battery oxygen evolution phenomena is reduced.

According to some embodiments of the application, the cover body further comprises a first through hole, and the one-way ventilation valve is detachably disposed in the first through hole.

According to some embodiments of the application, one end of the liquid storage component is abutted with the unidirectional ventilation valve, and the other end is abutted with the battery cell component.

According to some embodiments of the application, the battery cell assembly comprises a plurality of pole pieces and pole lugs, one end of each pole lug is electrically connected with the pole piece, the other end of each pole lug is electrically connected with the pole post assembly, and the pole pieces are arranged at intervals.

According to some embodiments of the application, the liquid storage assembly comprises a liquid storage block and a plurality of liquid storage bosses, wherein the liquid storage bosses are arranged around the side surface of the liquid storage block, and the liquid storage bosses are sequentially arranged in the interval between every two pole pieces.

According to some embodiments of the application, the cover body further comprises a second through hole, and the pole assembly is inserted into the second through hole.

According to some embodiments of the application, the pole assembly comprises a first pole and a second pole, one end of the first pole is connected with the cover plate main body, the other end of the first pole is detachably connected with the second pole, and the second pole is electrically connected with the pole lug.

According to some embodiments of the application, one end of the second post is larger than the second through hole, and the larger end of the second post can cover the second through hole.

According to some embodiments of the application, the cover plate body is provided with a pole groove, the second through hole is arranged at the bottom of the pole groove, and a sealing insulating filler is arranged in a space between the pole assembly and the pole groove.

A battery pack according to an embodiment of the second aspect of the present application includes the energy storage battery structure of the embodiment of the first aspect described above.

The battery pack according to the embodiment of the application has at least the following beneficial effects: the battery pack of the second aspect embodiment includes all the advantages of the energy storage battery structure of the first aspect embodiment, and is not described herein.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The application is further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic diagram illustrating the overall assembly of an energy storage cell structure according to an embodiment of the present application;

FIG. 2 is an overall exploded view of an energy storage cell structure according to an embodiment of the present application;

FIG. 3 is a schematic top view of an energy storage cell structure according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of the energy storage cell structure of an embodiment of the present application taken along line A-A of FIG. 3;

FIG. 5 is an enlarged schematic view of the energy storage cell structure of the embodiment of the present application at B in FIG. 4;

Reference numerals:

A housing 100;

Cover plate assembly 200, cover plate body 210, first through hole 211, second through hole 212, pole groove 213, pole assembly 220, first pole 221, second pole 222, unidirectional ventilation valve 230;

The battery cell assembly 300, the pole piece 310 and the pole lug 320;

a liquid storage assembly 400, a liquid storage block 410 and a plurality of liquid storage bosses 420.

Description of the embodiments

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

An energy storage cell structure according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 5.

Referring to fig. 1 to 5, the energy storage battery structure of the present embodiment includes: the battery pack comprises a shell 100, a cover plate assembly 200, a battery cell assembly 300 and a liquid storage assembly 400, wherein the top surface of the shell 100 is of an opening structure, the cover plate assembly 200 comprises a cover plate main body 210, a pole assembly 220 and a one-way ventilation valve 230, the pole assembly 220 and the one-way ventilation valve 230 are arranged on the cover plate main body 210, the cover plate assembly 200 covers the shell 100 to form a first cavity, electrolyte is arranged in the first cavity, and the one-way ventilation valve 230 is communicated with the first cavity and the outside air; the battery cell assembly 300 is arranged in the first cavity, the battery cell assembly 300 is soaked in electrolyte, the battery cell assembly 300 is electrically connected with the pole assembly 220, and a second cavity is formed between the battery cell assembly 300 and the cover plate assembly 200; the liquid storage assembly 400 is disposed in the second cavity, the electrolyte is stored in the liquid storage assembly 400, and the side surface of the liquid storage assembly 400 is disposed at a distance from the pole assembly 220.

Specifically, referring to fig. 1 and 2, in certain embodiments the energy storage cell structure is an aqueous zinc ion cell. The housing 100 may be of a cuboid-like structure, with the edges of the cuboid structure being provided with chamfers. During assembly, the battery cell assembly 300 is arranged in the first cavity in the shell 100, the liquid storage assembly 400 is arranged at the top of the battery cell assembly 300, the battery cell assembly 300 is electrically connected with the pole assembly 220, electrolyte is poured into the first cavity until the battery cell assembly 300 is soaked in the electrolyte, then the cover plate assembly 200 is clamped with the shell 100, and the cover plate main body 210 is fastened and connected with the shell 100 through glue or welding. It should be appreciated that the post assembly 220 includes a positive electrode and a negative electrode, and the cell assembly 300 includes a positive electrode portion and a negative electrode portion. During the charge and discharge of the battery, the electrolyte in the reservoir assembly 400 can be replenished into the cell assembly 300, as the electrolyte in the electrolyte can be lost from the electrolyte. The gas generated by hydrogen evolution and oxygen evolution can pass through the liquid storage assembly 400 and be discharged to the atmosphere through the unidirectional ventilation valve 230, so that the battery bulge and the bending of the pole piece 310 caused by bubbles in the pole piece 310 are avoided. It should be appreciated that the storage of the liquid storage assembly 400 can avoid providing a large amount of electrolyte to soak the cell assembly 300, thereby allowing free liquid in the battery, and the liquid storage assembly 400 can save the amount of electrolyte and reduce the cost.

Referring to fig. 1 and 2, the cap body 210 further includes a first through hole 211, and a one-way ventilation valve 230 is detachably disposed in the first through hole 211.

Specifically, referring to fig. 1 and 2, the one-way ventilation valve 230 may be an explosion-proof ventilation valve, and the one-way ventilation valve 230 may be detachable to facilitate replacement of the one-way ventilation valve 230. During assembly, the battery cell assembly 300 can be arranged in the first cavity in the housing 100, the liquid storage assembly 400 is arranged at the top of the battery cell assembly 300, the battery cell assembly 300 is electrically connected with the pole assembly 220, then the cover plate assembly 200 is clamped with the housing 100, the cover plate main body 210 is tightly connected with the housing 100 through glue or welding, electrolyte is poured into the first cavity through the first through hole 211 until the battery cell assembly 300 is soaked in the electrolyte, and the unidirectional ventilation valve 230 is then filled. Therefore, most of the components can be produced first, then the electrolyte is uniformly filled and then the unidirectional ventilation valve 230 is arranged, so that electrified assembly is avoided, and the process safety is improved.

Referring to fig. 2, one end of the liquid storage assembly 400 abuts against the one-way ventilation valve 230, and the other end abuts against the battery cell assembly 300.

Specifically, referring to fig. 2, the liquid storage assembly 400 is of a porous sponge structure, so that the liquid storage assembly 400 can be fixed, and meanwhile, the electrolyte is prevented from directly contacting the unidirectional ventilation valve 230, so that safety is improved.

Referring to fig. 4 and 5, the battery cell assembly 300 includes a plurality of pole pieces 310 and tabs 320, one end of each tab 320 is electrically connected to the pole piece 310, the other end is electrically connected to the pole post assembly 220, and the pole pieces 310 are disposed at intervals.

Specifically, referring to fig. 4 and 5, one end of the pole piece 310, which is far away from the bottom of the case 100, extends to form an extension piece, the pole piece 310 is a lamination structure, and a plurality of extension pieces are distributed in a linear array along the lamination direction, and the tab 320 is electrically connected with the extension piece, so that all the pole pieces 310 are electrically connected.

Referring to fig. 2 and 5, the liquid storage assembly 400 includes a liquid storage block 410 and a plurality of liquid storage bosses 420, the liquid storage bosses 420 are disposed around the sides of the liquid storage block 410, and the liquid storage bosses 420 are sequentially disposed in the interval between every two pole pieces 310.

Specifically, referring to fig. 2 and 5, the liquid storage boss 420 is disposed at one end of the liquid storage block 410 abutting against the battery cell assembly 300, and the liquid storage boss 420 is disposed at an interval with the pole assembly 220, so as to avoid a short circuit. The liquid storage boss 420 can increase the area of the electrolyte covering the pole piece 310, thereby better replenishing the lost electrolyte.

Referring to fig. 2 and 5, the cap body 210 further includes a second through hole 212, and the post assembly 220 is inserted into the second through hole 212.

In particular, referring to fig. 2 and 5, the second via 212 can facilitate electrically connecting the post assembly 220 to the cell assembly 300. It should be understood that the cap body 210 may be assembled after the terminal assembly 220 is electrically connected to the battery cell assembly 300, so that the cap body 210 is connected to the terminal assembly 220.

Referring to fig. 2 and 5, the pole assembly 220 includes a first pole 221 and a second pole 222, one end of the first pole 221 is connected to the cap body 210, the other end is detachably connected to the second pole 222, and the second pole 222 is electrically connected to the tab 320.

Specifically, referring to fig. 2 and 5, during assembly, the battery cell assembly 300 is disposed in a first cavity in the housing 100, the liquid storage assembly 400 is disposed on top of the battery cell assembly 300, the second pole 222 is electrically connected with the pole assembly 220, the electrolyte is poured into the first cavity until the battery cell assembly 300 is soaked in the electrolyte, then the cover plate main body 210 is clamped with the housing 100, the cover plate main body 210 is fastened and connected with the housing 100 by glue or welding, and the first pole 221 is electrically connected with the second pole 222. It should be appreciated that, during assembly, the cap body 210 may be assembled by electrically connecting the second pole 222 to the pole assembly 220, and injecting electrolyte through the second through hole 212.

Referring to fig. 5, one end of the second post 222 is larger than the second through hole 212, and the larger end of the second post 222 can cover the second through hole 212.

Specifically, referring to fig. 5, the larger end of the second post 222 may form a flange structure by which to abut the second through hole 212. The tightness of the structure of the energy storage battery can be increased.

Referring to fig. 5, a post groove 213 is formed in the cap body 210, a second through hole 212 is formed at the bottom of the post groove 213, and a sealing insulating filler is disposed in a space between the post assembly 220 and the post groove 213.

Specifically, referring to fig. 5, during assembly, the battery cell assembly 300 is disposed in a first cavity in the housing 100, the liquid storage assembly 400 is disposed at the top of the battery cell assembly 300, the battery cell assembly 300 is electrically connected with the pole assembly 220, the electrolyte is poured into the first cavity until the battery cell assembly 300 is soaked in the electrolyte, then the cover plate main body 210 is clamped with the housing 100, the cover plate main body 210 is fastened with the housing 100 through glue or welding, the pole assembly 220 is penetrated through the second through hole 212, and the sealing insulating filler is injected into the interval between the pole assembly 220 and the pole slot 213, so that the tightness of the energy storage battery structure and the fault tolerance of the assembly of the pole assembly 220 are increased. It should be appreciated that the sealing insulating filler may be an epoxy resin.

Referring to fig. 1 to 5, a battery pack according to a second aspect of the present utility model, which includes the energy storage battery structure according to the first aspect of the present utility model, is described below.

By providing the energy storage battery structure of the embodiment of the first aspect in the battery pack of the embodiment of the second aspect, all the beneficial effects of the energy storage battery structure of the embodiment of the first aspect are included, and are not described herein.

The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Energy storage battery structure, its characterized in that includes:

the top surface of the shell is of an opening structure;

The cover plate assembly comprises a cover plate main body, a pole assembly and a one-way ventilation valve, wherein the pole assembly and the one-way ventilation valve are arranged on the cover plate main body, the cover plate assembly covers the shell to form a first cavity, electrolyte is arranged in the first cavity, and the one-way ventilation valve is communicated with the first cavity and the outside air;

The battery cell assembly is arranged in the first cavity, the battery cell assembly is soaked in the electrolyte, the battery cell assembly is electrically connected with the pole assembly, and a second cavity is formed between the battery cell assembly and the cover plate assembly;

the liquid storage assembly is arranged in the second cavity, electrolyte is stored in the liquid storage assembly, and the side face of the liquid storage assembly is arranged at intervals with the pole assembly.

2. The energy storage cell structure of claim 1, wherein the cover body further comprises a first through hole, the one-way ventilation valve being removably disposed within the first through hole.

3. The energy storage cell structure of claim 2, wherein one end of the liquid storage component is abutted with the unidirectional ventilation valve, and the other end is abutted with the electric core component.

4. The energy storage battery structure according to claim 1, wherein the cell assembly comprises a plurality of pole pieces and pole lugs, one ends of the pole lugs are electrically connected with the pole pieces, the other ends of the pole lugs are electrically connected with the pole post assembly, and the pole pieces are arranged at intervals.

5. The energy storage battery structure of claim 4, wherein the liquid storage assembly comprises a liquid storage block and a plurality of liquid storage bosses, the liquid storage bosses are arranged around the side surfaces of the liquid storage block, and the liquid storage bosses are sequentially arranged in the interval between every two pole pieces.

6. The energy storage cell structure of claim 4, wherein the post assembly comprises a first post and a second post, one end of the first post is connected to the cover body, the other end is detachably connected to the second post, and the second post is electrically connected to the tab.

7. The energy storage cell structure of claim 6, wherein the cover body further comprises a second through hole, the post assembly being inserted into the second through hole.

8. The energy storage cell structure of claim 7, wherein an end of the second post is larger than the second through hole, and an end of the second post larger than the second through hole is capable of covering the second through hole.

9. The energy storage cell structure of claim 7, wherein the cover plate body is provided with a post groove, the second through hole is formed in the bottom of the post groove, and a sealing insulating filler is arranged in a space between the post assembly and the post groove.

10. Battery pack, characterized in that it comprises an energy storage battery structure according to any one of claims 1 to 9.