CN217387482U

CN217387482U - Battery cell

Info

Publication number: CN217387482U
Application number: CN202123013007.1U
Authority: CN
Inventors: 邓国友; 靳勇; 慎晓杰; 殷晓丰; 章丽莉
Original assignee: Microvast Power Systems Huzhou Co Ltd
Current assignee: Microvast Power Systems Huzhou Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-09-06
Anticipated expiration: 2031-12-01

Abstract

The utility model provides an electric core, be equipped with import and export on the electric core, the import with the export set up respectively in the relative both ends of electric core, import department is equipped with the check valve. The utility model discloses a set up import and export on electric core, can conveniently carry out drying and notes liquid to electric core, be favorable to improving the drying of electric core and annotate liquid efficiency.

Description

Battery cell

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to an electricity core is related to.

Background

With the development of electronic technology, lithium ion batteries have the advantages of high specific power, long cycle life, good safety performance, no pollution and the like, so that the lithium ion batteries are widely applied.

In the production process of the lithium ion battery, a plurality of factors such as the compaction density, the injection amount, the dust and the water content of the battery can be controlled so as to ensure the performance of the battery core. The water content in the battery cell has a crucial influence on the performance of the lithium ion battery, and if the water content in the battery cell is too high, the capacity and the first effect of the battery cell can be reduced, the internal resistance and the thickness of the battery cell are increased, and the cycle life of the battery cell is shortened, so that the control of the water content in the manufacturing process of the battery cell is crucial.

In addition, after the battery is used for a long time, the electrolyte in the battery is gradually consumed, side reaction products are generated in the battery, and the battery capacity is gradually reduced, so that the electrolyte needs to be periodically replenished into the battery.

Disclosure of Invention

The utility model aims at providing an electric core, through set up import and export on electric core, can conveniently carry out drying and notes liquid to electric core, be favorable to improving the drying of electric core and annotating liquid efficiency.

An embodiment of the utility model provides an electric core, be equipped with import and export on the electric core, the import with the export set up respectively in the relative both ends of electric core, import department is equipped with the check valve.

In an implementable manner, the inlet and the outlet are respectively provided at opposite ends of the cell in a length direction of the cell.

In an implementable manner, the inlet is provided at the bottom of the cell and the outlet is provided at the top of the cell.

In an implementable manner, the inlet and the outlet are offset to the left and right in the width direction of the battery cell.

In an achievable form, the outlet is provided with an on-off valve.

In one realisable form, the on-off valve is a manual ball valve.

In an implementable manner, the outlet is provided with a sealing cap for sealing the outlet.

In one form, the sealing cap is threadably connected to the outlet.

In one realisable form, a sealant is provided between the sealing cap and the outlet.

In an implementable manner, a sealing gasket is arranged in the sealing cap, and two sides of the sealing gasket respectively abut against the inner wall of the sealing cap and the end part of the outlet.

In an implementable manner, the cell includes a casing, the inlet and the outlet being provided at opposite ends of the casing respectively.

In one implementation, the cell includes a package, and the inlet and the outlet are disposed at opposite ends of the package.

Another embodiment of the utility model provides a battery, including above electric core.

The electric core provided by the utility model is provided with the inlet and the outlet, high-temperature dry gas or electrolyte can enter the electric core from the inlet, and moisture or side reaction products in the electric core can be discharged out of the electric core from the outlet, so that the electric core can be dried and injected conveniently; moreover, because the inlet and the outlet are respectively arranged at the two opposite ends of the battery cell, the flow of gas or liquid in the battery cell can be accelerated, and the drying and liquid injection efficiency of the battery cell can be improved. Simultaneously, because the import department is equipped with the check valve, the check valve can make gas or liquid one-way entering in the electric core, and after electric core drying or annotate the liquid and accomplish, the check valve self-closing to prevent that outside moisture from getting into in-core or the electrolyte in the electric core from taking place to leak.

Drawings

Fig. 1 is the utility model provides an in the embodiment of the utility model embodiment the spatial structure sketch map of electric core.

Fig. 2 is a schematic front view of the structure of fig. 1.

Fig. 3 is a schematic view of the exploded structure of fig. 2.

Fig. 4 is a schematic structural diagram of a battery cell in another embodiment of the present invention.

Fig. 5 is a perspective view of the sealing cap of fig. 4.

Fig. 6 is a schematic cross-sectional view of the sealing cap of fig. 4.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms of orientation such as up, down, left, right, front, back, top, bottom, etc. (if any) referred to in the specification and claims of the present invention are defined as the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the sake of clarity and convenience in technical solutions. It is to be understood that the use of directional terms should not be taken to limit the scope of the invention as claimed.

As shown in fig. 1 to fig. 3, in the battery cell 1 provided by the embodiment of the present invention, an inlet 11 and an outlet 12 are provided on the battery cell 1, the inlet 11 and the outlet 12 are respectively provided at two opposite ends of the battery cell 1, and a check valve 13 is provided at the inlet 11.

Specifically, in this embodiment, by providing the inlet 11 and the outlet 12 on the electrical core 1, the high-temperature dry gas or the electrolyte can enter the electrical core 1 from the inlet 11, and the moisture or the side reaction product in the electrical core 1 can be discharged from the outlet 12 to the outside of the electrical core 1, so as to dry and inject the liquid into the electrical core 1 conveniently.

As shown in fig. 1 to 3, as an embodiment, an inlet 11 and an outlet 12 are respectively disposed at two opposite ends of the battery cell 1 along the length direction L of the battery cell 1.

As shown in fig. 1 to 3, as an embodiment, the inlet 11 is disposed at the bottom of the battery cell 1, and the outlet 12 is disposed at the top of the battery cell 1.

As shown in fig. 1 to 3, as an embodiment, the inlet 11 and the outlet 12 are arranged to be shifted left and right in the width direction W of the battery cell 1.

As shown in fig. 1 to 3, an on-off valve 14 is provided at the outlet 12 as one embodiment.

In one embodiment, the on-off valve 14 is a manual ball valve.

As another embodiment, as shown in fig. 4 to 6, a sealing cap 16 is provided at the outlet 12, the sealing cap 16 is open at one end and sealed at the other end, and the sealing cap 16 is used for sealing the outlet 12.

As shown in fig. 5 and 6, the sealing cap 16 is a sealing nut, and the sealing cap 16 is connected to the outlet 12 by a screw.

In one embodiment, a sealant (not shown) is disposed between the sealing cap 16 and the outlet 12, and the sealant is filled between the threads of the sealing cap 16 and the threads of the outlet 12, so that the sealant can further ensure the sealing between the sealing cap 16 and the outlet 12, and can prevent the sealing cap 16 from loosening after installation.

As shown in fig. 5 and 6, as an embodiment, a gasket 17 is provided in the sealing cap 16, both sides of the gasket 17 respectively abut against the inner wall of the sealing cap 16 and the end of the outlet 12, and the gasket 17 can further ensure the sealing property between the sealing cap 16 and the outlet 12.

In one embodiment, an inlet 11 of the battery cell 1 is connected to an inlet pipeline (not shown), and an outlet 12 of the battery cell 1 is connected to an outlet pipeline (not shown).

Specifically, the work flow of the battery cell 1 during drying is as follows: dry gas or high-temperature dry gas enters the battery cell 1 from the inlet 11 to bake the battery cell; a vacuum-pumping device (not shown) may be connected to the outlet 12, and the interior of the battery cell 1 is evacuated by the vacuum-pumping device, at this time, the negative pressure state inside the battery cell 1 may lower the boiling point of water, and accelerate the gas flow, so that the moisture in the battery cell 1 can be evaporated and pumped out from the outlet 12 more quickly. Because the inlet 11 is arranged at the bottom of the battery cell 1 and the outlet 12 is arranged at the top of the battery cell 1, the air intake and exhaust distribution of the air intake and the air exhaust from the lower part to the upper part can effectively reduce the airflow resistance inside the battery cell 1, thereby more quickly taking out the moisture from the battery cell 1; and import 11 and export 12 stagger the setting about in the width direction W of electric core 1, control the staggered admission and exhaust distribution and can let high temperature dry gas be full of whole electric core 1, make the inside whole baking temperature that reaches the settlement sooner of electric core 1 to promote the homogeneity of baking temperature distribution. After the battery cell 1 is dried, the one-way valve 13 at the inlet 11 is automatically closed, and the sealing cap 16 (or the switch valve 14 is closed) is installed at the outlet 12, so that external moisture can be effectively prevented from entering the battery cell 1. And gas generated in the long-term use process of the battery cell 1 can be periodically discharged from the outlet 12 (the sealing cap 16 is detached or the switch valve 14 is opened), so that the safety and the electrical property of the battery cell 1 are improved.

Specifically, the working flow of the battery cell 1 during liquid injection (liquid replenishment) is as follows: electrolyte enters the interior of the battery core 1 from the inlet 11; the outlet 12 is connected with a vacuumizing device, and the interior of the electric core 1 is vacuumized by the vacuumizing device, so that the infiltration of the electric core 1 by the electrolyte is accelerated; after the liquid injection is completed, the one-way valve 13 is automatically closed, so that the electrolyte in the battery cell 1 is ensured not to leak. After the battery cell 1 is used for a long time, the electrolyte in the battery cell 1 can be gradually consumed, a side reaction product can be generated inside the battery cell 1, the capacity of the battery cell 1 is gradually attenuated, and at the moment, the electrolyte can be supplemented into the battery cell 1 through the inlet 11 and part of the side reaction product inside the battery cell 1 can be taken out from the outlet 12, so that the capacity and the cycle performance of the battery cell 1 are improved, and the service life of the battery cell 1 is prolonged. After the liquid supplement is completed, the check valve 13 at the inlet 11 is automatically closed, a sealing nut (not shown) is installed at the lower end of the check valve 13, and a sealing cap 16 (or a switch valve 14 is closed) is installed at the outlet 12 to ensure that the electrolyte does not leak.

As shown in fig. 1 to fig. 3, as an embodiment, the battery cell 1 is a square battery cell (or a cylindrical battery cell), the battery cell 1 includes a casing 15, the casing 15 of the battery cell 1 is an aluminum casing, a steel casing, or the like, and the inlet 11 and the outlet 12 are respectively disposed at two opposite ends of the casing 15.

As another embodiment, the battery cell 1 is a soft-package battery cell, the battery cell 1 includes a packaging bag (not shown), the packaging bag may be a packaging film such as an aluminum-plastic film, and the inlet 11 and the outlet 12 are respectively disposed at two opposite ends of the packaging bag.

The embodiment of the utility model provides a still provide a battery, including above electric core 1. The battery can be a soft package battery, a square-shell battery, and the like.

According to the electric core 1 provided by the embodiment of the utility model, the inlet 11 and the outlet 12 are arranged on the electric core 1, high-temperature dry gas or electrolyte can enter the electric core 1 from the inlet 11, and moisture or side reaction products in the electric core 1 can be discharged out of the electric core 1 from the outlet 12, so that the electric core 1 can be dried and injected with liquid conveniently; moreover, because the inlet 11 and the outlet 12 are respectively arranged at the two opposite ends of the battery cell 1, the flow of gas or liquid in the battery cell 1 can be accelerated, which is beneficial to improving the drying and liquid injection efficiency of the battery cell 1. Meanwhile, the one-way valve 13 is arranged at the inlet 11, so that gas or liquid can enter the battery cell 1 in one way through the one-way valve 13, and after the battery cell 1 is dried or liquid injection is completed, the one-way valve 13 is automatically closed, and thus external moisture is prevented from entering the battery cell 1 or electrolyte in the battery cell 1 is prevented from leaking.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The battery cell is characterized in that an inlet (11) and an outlet (12) are formed in the battery cell (1), the inlet (11) and the outlet (12) are respectively formed in two opposite ends of the battery cell (1), and a check valve (13) is arranged at the inlet (11).

2. The electrical core according to claim 1, wherein the inlet (11) and the outlet (12) are respectively disposed at opposite ends of the electrical core (1) in a length direction (L) of the electrical core (1).

3. The electrical core according to claim 1, wherein the inlet (11) is arranged at the bottom of the electrical core (1) and the outlet (12) is arranged at the top of the electrical core (1).

4. The electrical core according to claim 1, wherein the inlet (11) and the outlet (12) are arranged offset to the left and right in the width direction (W) of the electrical core (1).

5. The electrical core according to claim 1, wherein a switching valve (14) is provided at the outlet (12).

6. The electrical core according to claim 5, wherein the switching valve (14) is a manual ball valve.

7. The electrical core according to claim 1, wherein a sealing cap (16) is provided at the outlet (12), the sealing cap (16) being configured to seal the outlet (12).

8. The electrical core according to claim 7, characterized in that the sealing cap (16) is screwed to the outlet (12).

9. The electrical core according to claim 7, wherein a sealing compound is provided between the sealing cap (16) and the outlet (12).

10. The cell of claim 1, wherein the cell (1) comprises a housing (15) or a packaging bag, and the inlet (11) and the outlet (12) are disposed at opposite ends of the housing (15) or the packaging bag, respectively.