CN218957802U

CN218957802U - High-capacity battery

Info

Publication number: CN218957802U
Application number: CN202220729067.9U
Authority: CN
Inventors: 刘毅; 雷政军; 郑高峰
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-05-02
Anticipated expiration: 2032-03-30

Abstract

The utility model relates to a high-capacity battery, which comprises at least two single battery cores and an electrolyte storage pipeline, wherein the electrolyte storage pipeline comprises a main pipeline with a multi-branch storage pipeline and a plurality of branch pipes, a storage cavity is arranged in the main pipeline and can accommodate electrolyte, the branch pipes are arranged between the main pipeline and the single battery cores, openings are arranged on a single battery core shell, and the branch pipes are correspondingly connected with the single battery core shell openings one by one so as to realize the communication between the electrolyte storage pipeline and the single battery cores. The scheme realizes that a plurality of single battery cells are in the same electrolyte system, balances the temperature of the single battery cells, and reduces the problem of local overheating caused by the difference of the single battery cells.

Description

High-capacity battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery shell with a multi-channel electrolyte pipeline.

Background

The square battery with the maximum capacity of the lithium battery in the current market is 300Ah, the cylindrical battery with the maximum capacity is not more than 100Ah, the energy storage industry is expected to develop in a long term under the background of 'carbon peak' and 'carbon neutralization', 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 in energy storage application, so that the connection spare and accessory parts are numerous, the connection steps are complex and complicated, the consumption of a battery management system, wires and a battery box is very large, and the energy storage cost is high.

The large-capacity lithium ion battery formed by combining the existing battery cells in parallel has a simple structure and is convenient to operate, but how to enable a plurality of battery cells to be in a uniform electrolyte system to form a uniform and balanced electrolyte environment is a difficult problem to solve.

CN 113823881a discloses an electrolyte uniform filling device for processing a storage battery, which is used for filling the battery, and does not realize uniform electrolyte environment for the battery.

Disclosure of Invention

In view of the above, it is necessary to provide a piping system in which each cell is in a uniform electrolyte system to form a uniform and balanced electrolyte environment.

The technical scheme of the patent is as follows:

the utility model provides a large capacity battery, includes two at least monomer electric core and electrolyte stock solution pipeline, electrolyte stock solution pipeline includes trunk line and a plurality of branch pipe, be the stock solution chamber in the trunk line, can hold the electrolyte, the branch pipe is located between trunk line and the monomer electric core, be equipped with the opening on the monomer electric core casing, the branch pipe with monomer electric core casing opening one-to-one is connected, in order to realize electrolyte stock solution pipeline and monomer electric core intercommunication.

Preferably, one end of the main pipe is provided with a liquid injection and air extraction part, and the liquid injection and air extraction part is communicated with the liquid storage cavity so as to vacuumize or inject the electrolyte into the liquid storage pipe.

Preferably, the liquid injection and air extraction part is a control valve.

Preferably, the main pipeline is provided with a pressure relief part.

Preferably, a pipeline switch is arranged at the opening of the single cell shell and connected with the branch pipe so as to control the circulation of electrolyte between the liquid storage pipeline and the single cell.

Preferably, a dissolution mechanism is arranged at the opening of the single cell shell, the dissolution mechanism comprises a dissolution component, the opening is sealed, when the dissolution component contacts with electrolyte in the electrolyte storage pipeline, the dissolution component dissolves, and the inside of the single cell is communicated with the electrolyte storage pipeline.

Preferably, the dissolution mechanism further comprises an isolation component, the isolation component is arranged between the opening and the dissolution component, and the isolation component and the dissolution component jointly seal the opening.

Preferably, the opening of the shell is provided with a connecting seat, the connecting seat comprises a base and a connecting pipe connected with the base, and the dissolving mechanism is arranged in the connecting seat to seal the opening.

Preferably, the dissolving mechanism further comprises an isolation component arranged between the opening and the dissolving component, and the isolation component and the dissolving component jointly seal the opening.

Preferably, the material of the dissolution component is one of polymethyl methacrylate, silicone rubber, polyvinyl chloride, polycarbonate or ABS plastic.

Preferably, the dissolution component is a polymethyl methacrylate sheet.

Preferably, the dissolving assembly has a thickness of less than 2mm.

Preferably, the separator is a protective film insoluble in the electrolyte.

Preferably, the thickness of the isolation assembly is less than 0.1mm.

Preferably, the isolation component covers one surface of the dissolution component opposite to the opening of the shell.

Compared with the prior art, the utility model has the following beneficial effects:

according to the high-capacity battery, the battery core cavities of all the single battery cores are communicated through the electrolyte liquid storage pipeline, so that the single battery cores are located in the same electrolyte system, the problem of local overheating caused by difference of the single battery cores is solved, the uniformity of the performance of the high-capacity battery is improved, the cycle performance of the high-capacity battery is improved, and the service life of the high-capacity battery is prolonged. And the manufacturing process of the high-capacity battery is simple, the structure is simple, and the cost is low. According to the electrolyte liquid storage system pipeline, liquid injection and liquid supplementing of a plurality of single battery cores can be achieved simultaneously, and liquid injection/liquid supplementing efficiency is improved.

The scheme reduces the pressure-resistant requirement on the shell and saves materials.

Drawings

FIG. 1 is a block diagram of a high capacity battery

FIG. 2 is a block diagram of a high capacity battery reservoir pipe

FIG. 3 is a block diagram of a high capacity battery with a pipe switch at the opening of the housing

Fig. 4 is a block diagram of a high-capacity battery with a dissolution mechanism at the opening of the case

Figure 5 structure diagram of shell opening connecting seat

Reference numerals in the specification are as follows:

1-monomer cell 2-main pipeline 3-branch pipe 4-liquid injection and air extraction part 5-connecting seat 6-dissolving mechanism

7-single cell opening 8-pressure release part 9-pipeline switch 51-base 52-connecting pipe

53-bearing table 10-liquid storage cavity

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

As shown in fig. 1-2, this embodiment provides a high-capacity battery, including a plurality of parallelly connected or series connection battery single body 1 and electrolyte stock solution pipeline, electrolyte stock solution pipeline includes trunk line 2 and a plurality of branch pipe 3, is 5 monomer electric cores in the figure, is equipped with 5 branch pipes on the trunk line 2, is stock solution chamber 10 in the trunk line, holds electrolyte in the stock solution chamber 10, and branch pipe 3 locates between trunk line 2 and the monomer electric core 1, is equipped with opening 7 on the monomer electric core 1, and branch pipe 3 and opening 7 one-to-one are connected, and the connected mode can be the welding. Electrolyte is injected into the main pipeline 2, the electrolyte flows into the single battery cells 1 through the branch pipes 3 and the shell openings 7, a certain amount of electrolyte can be stored in the liquid storage pipeline, each single battery cell is ensured to be in a common electrolyte system after the single battery cells are filled with the electrolyte, the electrolyte capacity in each single battery cell can be ensured to be consistent in the use process of the single battery cell, and the difference of the performance of the single battery cell caused by the consumption difference of the electrolyte is reduced.

In one embodiment, the main pipeline 2 is provided with a liquid injection and air extraction part 4, before liquid injection, the pipeline is subjected to vacuum operation through the liquid injection and air extraction part, after the vacuum operation is completed, the pipeline is subjected to liquid injection, air in the pipeline and the single battery cell is eliminated, and the product quality is ensured.

In one embodiment, the liquid injection pumping section may be a control valve to effect a liquid injection pumping operation of the tubing.

In one embodiment, as shown in fig. 3, a pressure relief part 8 is arranged on the main pipeline, and when the single cell opening 7 connected with the branch pipe is the explosion venting opening of the cell, the pressure relief part 8 on the main pipeline 2 can perform pressure relief operation on the single cell, so that the safety of the high-capacity battery is ensured. The pressure relief part can be a pressure relief film arranged on the opening of the main pipeline, and can also be used for pressure relief by arranging a pressure relief valve at the opening of the main pipeline.

Example 2

As shown in fig. 3, the present embodiment provides a high-capacity battery, which includes a plurality of parallel or serial single cells 1 and an electrolyte storage pipeline, the electrolyte storage pipeline includes a main pipeline 2 and a plurality of branch pipes 3, a pipeline switch 9 is disposed on an opening 7 of the single cell, and the pipeline switch 9 is connected with the branch pipes 3, so that the electrolyte in each branch pipe can be controlled to flow into the single cell 1. Electrolyte is injected into the main pipeline 2, when the pipeline switch 9 is opened, the electrolyte in the liquid storage cavity flows into the single cell, and the electrolyte is injected into the single cell, so that a plurality of single cells can be in a unified electrolyte system, and when the pipeline switch is closed, the opening of the single cell shell can be sealed.

Example 3

As shown in fig. 4 and 5, a high-capacity battery comprises a plurality of parallel or serial single cells 1 and an electrolyte storage pipeline, wherein the electrolyte storage pipeline comprises a main pipeline 2 and a plurality of branch pipelines 3 of a multi-branch liquid storage pipeline, a dissolving mechanism 6 is arranged at an opening 7 of the single cell, the dissolving mechanism 6 is a polymethyl methacrylate sheet with the thickness of 2mm, a connecting seat 5 is arranged on an opening of a shell, the connecting seat 5 comprises a base 51 and a connecting pipe 52, a through hole is arranged on the base and can be communicated with the opening 7 of the shell, the connecting pipe 53 can be fixedly connected on the base and jointly form a channel for flowing electrolyte into the single cell, a bearing table 53 is arranged on the connecting pipe 52, electrolyte is injected into the main pipeline 2, when the electrolyte in the branch pipelines 3 flows into the connecting pipe 52, the polymethyl methacrylate sheet gradually dissolves and disappears due to contact with the electrolyte, the opening of the cell is opened, and the electrolyte flows into the single cell opening, a certain amount of electrolyte is contained in the liquid storage cavity, so that a plurality of cells are in a unified electrolyte system. The embodiment can also realize that the opening of the single cell shell can be opened without mechanical operation of a switch when the cell is filled with liquid or supplemented with liquid, and has simple structure and convenient operation.

In another embodiment, the dissolution mechanism comprises a dissolution component and an isolation component, the dissolution component is a polymethyl methacrylate sheet with the thickness of 3mm, the isolation component is a polypropylene film with the thickness of 0.1mm, the polypropylene film is covered on the supporting table, the polypropylene film is adhered to one surface of the polymethyl methacrylate sheet opposite to the opening of the shell, the opening of the shell is sealed, the connecting pipe 52 is connected with the branch pipe 3, and the polypropylene film is arranged on one side opposite to the opening of the shell and is insoluble in electrolyte, so that the polypropylene film cannot be dissolved by the evaporated electrolyte in the single battery cell, and cannot be dissolved when the battery is inclined or vibrated in the transportation process, and the sealing state of the battery is still maintained. Electrolyte is injected into the main pipeline 2, when the electrolyte in the branch pipeline 3 flows into the connecting pipe 52, the polymethyl methacrylate sheet is gradually dissolved by the electrolyte and disappears, the polypropylene film moves under the action of fluid, the shell opening is not sealed any more, the cell opening is opened, the electrolyte flows into the single cell opening, the electrolyte injection of the single cell is realized, the electrolyte is contained in the liquid storage cavity, and a plurality of cells are in a unified electrolyte system.

In this patent, the material of isolation component can also be polyethylene.

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 and are described in detail herein without thereby 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. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims

1. The utility model provides a large capacity battery, its characterized in that includes two at least monomer electric core and electrolyte stock solution pipeline, electrolyte stock solution pipeline includes trunk line and a plurality of branch pipe, be the stock solution chamber in the trunk line, can hold the electrolyte, the branch pipe is located between trunk line and the monomer electric core, be equipped with the opening on the monomer electric core casing, the branch pipe with the casing opening one-to-one is connected, in order to realize electrolyte stock solution pipeline with monomer electric core intercommunication.

2. The high-capacity battery as claimed in claim 1, wherein a liquid injection and suction part is arranged at one end of the main pipe, and the liquid injection and suction part is communicated with the liquid storage cavity so as to vacuumize or inject the electrolyte liquid storage pipeline.

3. The high capacity cell as claimed in claim 2, wherein said liquid-filling and air-extracting part is a control valve.

4. The high-capacity battery as claimed in claim 1, wherein the main pipe is provided with a pressure relief portion.

5. A high capacity cell as claimed in any one of claims 1 to 4, wherein said cell housing opening is provided with a conduit switch, said conduit switch being connected to said manifold for controlling the flow of electrolyte between the reservoir conduit and the cell.

6. The high capacity battery of claim 1, wherein the single cell housing opening is provided with a dissolution mechanism, the dissolution mechanism comprises a dissolution component, the opening is sealed, when the dissolution component contacts with the electrolyte in the electrolyte storage pipeline, the dissolution component dissolves, and the single cell is communicated with the electrolyte storage pipeline.

7. The high capacity cell as recited in claim 6, wherein said dissolution mechanism further includes a spacer assembly disposed between said opening and said dissolution assembly, said spacer assembly and said dissolution assembly cooperatively sealing said opening.

8. The high-capacity battery as claimed in claim 7 or 6, wherein the opening of the case is provided with a connection seat comprising a base and a connection pipe connected with the base, and the dissolution mechanism is provided in the connection seat to seal the opening.

9. The high capacity cell as recited in claim 6, wherein said dissolution member is one of polymethyl methacrylate, silicone rubber, polyvinyl chloride, polycarbonate or ABS plastic.

10. The high capacity battery of claim 9, wherein said dissolution assembly is a polymethyl methacrylate sheet.

11. The high capacity battery as recited in claim 10, wherein said dissolution assembly has a thickness of less than 2mm.

12. The high capacity battery of claim 7, wherein said separator assembly is a protective film that is insoluble in an electrolyte.

13. The high capacity battery of claim 12, wherein said separator assembly has a thickness of less than 0.1mm.

14. The high capacity cell as recited in claim 13, wherein said separator assembly overlies a face of said dissolution assembly opposite said opening of said housing.

15. A high-capacity battery pack comprising a plurality of the high-capacity batteries according to any one of claims 1 to 14.

16. A high capacity battery energy storage system comprising a plurality of the high capacity battery packs of claim 15.