CN220253301U - Electrolyte tank capable of applying pressure to battery cell - Google Patents
Electrolyte tank capable of applying pressure to battery cell Download PDFInfo
- Publication number
- CN220253301U CN220253301U CN202321645178.2U CN202321645178U CN220253301U CN 220253301 U CN220253301 U CN 220253301U CN 202321645178 U CN202321645178 U CN 202321645178U CN 220253301 U CN220253301 U CN 220253301U
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- Prior art keywords
- pressing plate
- electrolyte
- cell
- piece
- battery cell
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- 238000003825 pressing Methods 0.000 title claims abstract description 96
- 239000003792 electrolyte Substances 0.000 title claims abstract description 56
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 210000004027 cell Anatomy 0.000 abstract description 58
- 210000005056 cell body Anatomy 0.000 abstract description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052710 silicon Inorganic materials 0.000 abstract description 10
- 239000010703 silicon Substances 0.000 abstract description 10
- 230000001788 irregular Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052744 lithium Inorganic materials 0.000 abstract description 6
- 238000001556 precipitation Methods 0.000 abstract description 6
- 230000008595 infiltration Effects 0.000 abstract description 4
- 238000001764 infiltration Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229920006169 Perfluoroelastomer Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
The utility model provides an electrolyte bath capable of applying pressure to a cell, comprising: the cell body is used for accommodating the battery cell and electrolyte; the pressing assembly comprises a pressing plate and a transmission piece, wherein the pressing plate is positioned in the cell body, one end of the transmission piece is connected with the pressing plate, the other end of the transmission piece extends out of the cell body so as to be connected with the driving piece, and the pressing plate abuts against the surface of the cell to apply pressure to the cell under the action of the driving piece. According to the electrolyte tank device provided by the embodiment of the utility model, the pressing component is used for acting on the surface of the battery core in the electrolyte tank, and the battery core in the electrolyte tank is soaked, and is subjected to chemical composition and cyclic charge and discharge under the action of external force, so that the phenomenon of irregular deformation of the silicon-based square-shell battery core and the pole piece is avoided, the direct rate of the manufacturing process is improved, the risks of poor infiltration and lithium precipitation of the battery core are reduced, and the cycle and safety performance of the battery core are further improved.
Description
Technical Field
The utility model relates to the field of batteries, in particular to an electrolyte tank capable of applying pressure to a battery cell.
Background
In recent years, the demand of power batteries for high energy density is increasing, and silicon-based negative electrodes have been a research hotspot due to higher gram capacity. Because the full-charge thickness of the silicon-based negative electrode sheet is about 20 to 70 percent different from the rolled thickness, the irreversible expansion is about 5 to 35 percent, the problem of wrinkling such as irregular deformation of the sheet is easy to occur in the production process, gas generated during formation cannot be timely discharged to form bubble-shaped lithium precipitation, and lithium precipitation caused by wrinkling is easy to occur during capacity separation and subsequent charge and discharge.
When the current square shell silicon-based battery is manufactured, the group margin is generally 60-90%, a larger space is formed inside the battery core after the battery core is filled in the shell, the battery core can not be restrained from free deformation by applying external pressure to the battery during charging and discharging, the process generally selects lamination or coiled battery core to be filled in the shell for liquid filling infiltration, and the battery core is formed into a component section for charging and discharging by using an opening negative pressure.
The problem of irregular deformation of the pole piece caused by open negative pressure charge and discharge is not obviously improved, gas generated by formation is not discharged in the pole piece in time to cause bubble-shaped lithium precipitation, electrolyte is easy to change, the process is complex, and the effect is poor. In addition, the manufacturing of the square shell battery generally carries out hot pressing and thermal compounding on the stacked core or the rolled core, but the expansion of the silicon-based pole piece is large, the method can only slightly improve, the problem of pole piece fold after component formation cannot be completely solved, moreover, the battery core after hot pressing or thermal compounding is easy to generate poor infiltration, black lines or lithium precipitation are formed at the middle part of the battery core, and the performance of the battery core is influenced.
Disclosure of Invention
In view of the above, an object of the present utility model is to provide an electrolyte tank capable of applying pressure to a cell.
In order to solve the technical problems, the utility model adopts the following technical scheme:
according to an embodiment of the utility model, an electrolyte tank capable of applying pressure to a battery cell comprises:
the battery body is used for containing the battery cell and the electrolyte and comprises a main body with an opening formed above and a cover plate connected above the main body and capable of opening/closing the opening;
a pressing assembly, the pressing assembly comprising:
the pressing plate is positioned in the tank body,
one end of the transmission piece is connected with the pressing plate piece, the other end of the transmission piece extends out of the tank body so as to be connected with the driving piece,
the pressing plate piece follows the transmission piece to abut against the surface of the battery cell under the action of the driving piece so as to apply pressure to the battery cell.
Further, the main body comprises a door plate and a control panel, wherein the door plate is positioned at the side edge of the main body, and the control panel is embedded on the surface of the main body.
Further, the material of the tank body is a metal material;
the electrolyte tank also comprises an insulating layer, and the insulating layer is attached to the inner wall of the tank body.
Further, the transmission piece comprises a transmission rod, the pressing plate piece comprises a first pressing plate, the first pressing plate is located at the tail end of the transmission rod, the transmission rod penetrates through the cover plate, and the first pressing plate follows the transmission rod to do lifting motion in the electrolyte tank under the driving force of the driving piece so as to cover or keep away from the battery cell located at the bottom of the tank body and lying flat.
Further, the first platen area matches the body bottom area.
Further, the transmission part comprises a screw rod, the screw rod is embedded on the side wall of the main body and is parallel to the cover plate, the driving end of the screw rod protrudes out of the main body to be connected with the driving part, the pressing plate part comprises a second pressing plate, a threaded hole is formed in the second pressing plate, and the second pressing plate is screwed at the end part of the screw rod through the threaded hole;
the pressing assembly further comprises a plurality of bearing pieces, each bearing piece comprises a plurality of bearing plates and a flexible bottom support piece connected between the bottoms of two adjacent bearing plates, each bottom support piece is used for bearing a battery cell so that the battery cell is vertically located between the two bearing plates, and the screw rod rotates under the driving of the driving piece and drives the second pressing plate to move along the screw rod so as to apply pressure to the bearing plates and the battery cells located between the bearing plates.
Further, the areas of the second pressing plate, the carrier plate and the battery cell are sequentially reduced.
Further, the electrolytic bath further includes:
the sealing parts are respectively arranged between the main body and the cover plate, and between the transmission part and the tank body.
Further, a first reserved opening is formed in the main body, wherein the electrolyte tank further comprises:
the electric element is connected with the electric device,
the energizing element comprises a cable and a connector, the connector is installed at the first reserved opening, the cable is connected with the connector, and the sealing element is also arranged at the connector and the first reserved opening.
Further, the main body is further provided with a second reserved opening, wherein the electrolyte tank further comprises:
the vacuumizing piece comprises a valve, the valve is installed on the second reserved opening, a sealing piece is also arranged between the valve and the second reserved opening, and the valve is used for being connected with a vacuum pump to vacuumize the tank body.
The technical scheme of the utility model has at least one of the following beneficial effects:
the electrolyte pool capable of applying pressure to the battery cell disclosed by the utility model realizes that the square-shell silicon-based battery is manufactured by adopting the scheme of firstly applying external force to the battery cell to form components and then adding the components into a shell to supplement liquid. The pressing assembly is used for acting on the surface of the battery cell in the electrolyte tank, and the battery cell in the electrolyte tank is soaked, and is subjected to chemical composition and cyclic charge and discharge under the action of external force, so that the phenomenon of irregular deformation of the silicon-based square-shell battery cell and the pole piece is avoided, the direct rate of the manufacturing process is improved, the risks of poor infiltration and lithium precipitation of the battery cell are reduced, and the cycle and safety performance of the battery cell are improved.
Drawings
FIG. 1 is a schematic diagram of an overall structure of an electrolyte tank capable of applying pressure to a cell according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a pressing assembly in an electrolyte tank capable of applying pressure to a cell according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a pressing assembly in an electrolyte tank capable of applying pressure to a cell according to another embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a lead screw, a second pressing plate and a plurality of bearing members in an electrolyte tank capable of applying pressure to a cell according to another embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a joint in an electrolyte tank capable of applying pressure to a cell according to an embodiment of the present utility model.
Reference numerals:
a. a battery cell;
10. a cell body; 110. a main body; 120. a cover plate; 130. a door panel; 140. a control panel; 20. an energizing element; 210. a joint; 220. a cable; 30. a pressing assembly; 310. a first platen; 320. a transmission rod; 330. a screw rod; 340. a second pressing plate; 351. a carrier plate; 410. and (3) a valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the utility model, fall within the scope of protection of the utility model.
An electrolyte bath capable of applying pressure to a cell according to an embodiment of the present utility model will be described in detail with reference to the accompanying drawings.
Specifically, as shown in fig. 1, an electrolyte tank capable of applying pressure to a cell according to an embodiment of the present utility model includes a tank body 10 and a pressure applying assembly 30.
The cell body 10 is used for accommodating an electric core and electrolyte, and the cell body 10 comprises a main body 110 with an opening formed above and a cover plate 120 connected above the main body 110 and capable of opening/closing the opening.
The pressing assembly 30 comprises a pressing plate and a transmission piece, wherein the pressing plate is positioned in the cell body 10, one end of the transmission piece is connected with the pressing plate, the other end of the transmission piece extends out of the cell body 10 so as to be connected with a driving piece, and the pressing plate follows the transmission piece to abut against the surface of the cell under the action of the driving piece so as to apply pressure to the cell.
That is, the external force is applied to the battery cells in the cell body 10 by the pressing assembly 30, so that the battery cells are divided into components under the condition of applying the external force, the irregular deformation phenomenon of the silicon-based square-shell battery cells and the pole pieces is avoided, and the direct rate of the battery cell manufacturing process is improved.
In one embodiment, the main body 110 includes a door panel 130 and a control panel 140, the door panel 130 is located at a side of the main body 110, and the control panel 140 is embedded on a surface of the main body 110.
The control panel 140 is arranged on the surface of the main body 110, so that the parameter adjustment of each component in the electrolyte tank is convenient for an operator.
In one embodiment, the material of the tank body 10 is a metal material; the electrolyte tank further comprises an insulating layer attached to the inner wall of the tank body 10.
The material of the cell body 10 is preferably cast iron or an alloy, but is not limited thereto. The insulating layer is preferably made of PP and PET materials, and is favorable for insulating the electrolyte tank and avoiding electrolyte leakage.
In one embodiment, as shown in fig. 2, the transmission member includes a transmission rod 320, the pressing member includes a first pressing plate 310, the first pressing plate 310 is located at the end of the transmission rod 320, the transmission rod 320 penetrates through the cover plate 120, and the first pressing plate 310 moves up and down in the electrolyte tank along with the transmission rod 320 under the driving force of the driving member, so as to cover or keep away from the electrical core a lying on the bottom of the tank body 10. The driving member is preferably a motor, but is not limited thereto.
That is, the battery cell a is lying on the bottom of the cell body 10, the first pressing plate 310 is located above the lying battery cell a, the first pressing plate 310 moves downward under the driving force of the motor and covers and presses the surface of the battery cell a, so that irregular deformation of the silicon-based square-shell battery cell a and the pole piece is avoided, and the straightness of the battery cell a is improved.
In one embodiment, the first platen 310 area matches the bottom area of the main body 110.
That is, the area of the first pressing plate 310 is close to the bottom area of the main body 110, which can increase the area of the first pressing plate 310 covering the piezoelectric core a and increase the pressing efficiency of the pressing assembly 30.
In an alternative embodiment, as shown in fig. 3 and 4, the transmission member includes a screw rod 330, the screw rod 330 is embedded on a side wall of the main body 110 and is parallel to the cover plate 120, and the driving end of the screw rod protrudes out of the main body 110 to be connected with the driving member, the pressing member includes a second pressing plate 340, a threaded hole is formed in the second pressing plate 340, and the second pressing plate 340 is screwed at an end of the screw rod 330 through the threaded hole.
The pressing assembly 30 further comprises a plurality of bearing members, the bearing members comprise a plurality of bearing plates 351 and flexible bottom support members connected between bottoms of two adjacent bearing plates 351, the bottom support members are used for bearing the electric core a so that the electric core a is vertically arranged between the two bearing plates 351, and the screw rod 330 is driven by the driving member to rotate and drive the second pressing plate 340 to move along the screw rod 330 so as to apply pressure to the bearing plates 351 and the electric core a arranged between the bearing plates 351.
That is, in the present embodiment, the battery cell a stands in the cell 10, as compared to the embodiment in which the battery cell is laid on the bottom of the cell 10. In this embodiment, the carrier plate 351 and the bottom support member are used to make the battery cell stand in the cell body 10, and the screw rod 330 rotates under the driving force of the driving member and drives the second pressing plate 340 to move along the screw rod 330, so that the second pressing plate 340 and the plurality of carrier plates 351 perform shrinkage gathering or relaxation movement. When the first pressing plate 340 and the plurality of carrier plates 351 shrink and gather together, the second pressing plate 340 abuts against the surface of the carrier plates 351 and is applied to the surface of the battery cell a, so that irregular deformation of the silicon-based square-shell battery cell a and the pole piece is avoided, and the through rate of the manufacturing process of the battery cell a is improved.
In an embodiment, the areas of the second pressing plate 340, the carrier plate 351, and the cells decrease sequentially.
That is, the area of the first pressing plate 310 is larger than that of the carrier plate 351 so that the carrier plate 351 is uniformly stressed. The area of the carrier plate 351 is larger than that of the battery cell, so that when the carrier plate 351 is propped against the surface of the battery cell, the battery cell is uniformly stressed, and the flatness of the battery cell is improved.
In one embodiment, the electrolyte tank further includes a plurality of sealing members respectively disposed between the main body 110 and the cover plate 120, and between the transmission member and the tank body 10.
The plurality of sealing members may be sealing rings, sealing strips, etc., respectively, the sealing rings and the sealing strips being connected between the respective members so that the electrolyte bath is sealed, such as: sealing of the transmission rod 320, sealing of the electrolyte tank door plate 130, sealing of the energizing assembly and the like are realized. The sealing ring and the sealing strip are preferably made of corrosion-resistant and high-temperature-resistant materials, such as: FFKM perfluor rubber and HNBR hydrogenated styrene butadiene rubber.
In an embodiment, a first reserved opening is formed in the main body 110, wherein the electrolyte tank further includes an energizing element 20, the energizing element 20 includes an electrical cable 220 and a connector 210, the connector 210 is installed at the first reserved opening, the electrical cable 220 is connected to the connector 210, and the sealing element is also disposed at the positions of the connector 210 and the first reserved opening.
The cable 220 is subjected to corrosion resistance and insulation treatment, and the cable 220 cannot be corroded in the process of electrolyte soaking. As shown in fig. 5, fig. 5 is a schematic structural view of the connector 210, and the connector 210 is connected to the first reserved opening of the main body 110 and connected to the external chemical distribution cabinet. The joint 210 is in sealing connection with the first reserved opening through a sealing ring.
In an embodiment, the main body 110 is further provided with a second reserved opening, wherein the electrolyte tank further includes a vacuum pumping member, the vacuum pumping member includes a valve 410, the valve 410 is installed on the second reserved opening, the sealing member is also disposed between the valve 410 and the second reserved opening, and the valve 410 is used for connecting a vacuum pump to pump the vacuum in the tank 10.
That is, the valve 410 is installed on the second reserved hole, and the external vacuum pump is used to pump vacuum from the valve 410, and the vacuum degree is maintained in the tank 10 after the valve 410 is closed.
In an embodiment, the electrolyte tank may include a tank body, a sealing assembly, an energizing assembly, a vacuum pumping assembly, and a pressurizing assembly (reference is made to the above for details of each component, and a detailed description thereof is omitted herein). Therefore, the electrolyte tank not only can be used for dissolving the battery cells in the electrolyte tank under the condition of applying pressure to form the battery cells, but also can be used for circularly charging and discharging, so that the direct rate of the battery cell manufacturing process is further improved.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.
Claims (10)
1. An electrolyte bath capable of applying pressure to a cell, comprising:
the battery body is used for containing the battery cell and the electrolyte and comprises a main body with an opening formed above and a cover plate connected above the main body and capable of opening/closing the opening;
a pressing assembly, the pressing assembly comprising:
the pressing plate is positioned in the tank body,
one end of the transmission piece is connected with the pressing plate piece, the other end of the transmission piece extends out of the tank body so as to be connected with the driving piece,
the pressing plate piece follows the transmission piece to abut against the surface of the battery cell under the action of the driving piece so as to apply pressure to the battery cell.
2. The electrolyte bath capable of applying pressure to a cell of claim 1, wherein the body comprises a door panel and a control panel, the door panel being positioned on a side of the body, the control panel being embedded in a surface of the body.
3. The electrolyte tank capable of applying pressure to the battery cell according to claim 2, wherein the material of the tank body is a metal material;
the electrolyte tank also comprises an insulating layer, and the insulating layer is attached to the inner wall of the tank body.
4. The electrolyte tank capable of applying pressure to the battery cell according to claim 2, wherein the transmission member comprises a transmission rod, the pressing plate member comprises a first pressing plate, the first pressing plate is located at the tail end of the transmission rod, the transmission rod penetrates through the cover plate, and the first pressing plate follows the transmission rod to perform lifting movement in the electrolyte tank under the driving force of the driving member so as to cover or keep away from the battery cell lying on the bottom of the tank body.
5. The electrolyte reservoir capable of applying pressure to a cell of claim 4, wherein the first platen area matches the body bottom area.
6. The electrolyte tank capable of applying pressure to the battery cell according to claim 2, wherein the transmission member comprises a screw rod which is embedded on the side wall of the main body and is parallel to the cover plate, and the driving end of the screw rod protrudes out of the main body to be connected with the driving member, the pressing plate member comprises a second pressing plate, a threaded hole is formed in the second pressing plate, and the second pressing plate is screwed at the end part of the screw rod through the threaded hole;
the pressing assembly further comprises a plurality of bearing pieces, each bearing piece comprises a plurality of bearing plates and a flexible bottom support piece connected between the bottoms of two adjacent bearing plates, each bottom support piece is used for bearing a battery cell so that the battery cell is vertically located between the two bearing plates, and the screw rod rotates under the driving of the driving piece and drives the second pressing plate to move along the screw rod so as to apply pressure to the bearing plates and the battery cells located between the bearing plates.
7. The electrolyte bath capable of applying pressure to a cell as recited in claim 6, wherein areas of the second platen, the carrier plate, and the cell decrease in sequence.
8. The electrolyte reservoir capable of applying pressure to a cell of claim 1, further comprising:
the sealing parts are respectively arranged between the main body and the cover plate, and between the transmission part and the tank body.
9. The electrolyte tank capable of applying pressure to a cell according to claim 8, wherein a first reserved opening is provided on the main body, and wherein the electrolyte tank further comprises:
the electric element is connected with the electric device,
the energizing element comprises a cable and a connector, the connector is installed at the first reserved opening, the cable is connected with the connector, and the sealing element is also arranged at the connector and the first reserved opening.
10. The electrolyte bath capable of applying pressure to a cell of claim 8, wherein the body is further provided with a second preformed port, and wherein the electrolyte bath further comprises:
the vacuumizing piece comprises a valve, the valve is installed on the second reserved opening, a sealing piece is also arranged between the valve and the second reserved opening, and the valve is used for being connected with a vacuum pump to vacuumize the tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321645178.2U CN220253301U (en) | 2023-06-27 | 2023-06-27 | Electrolyte tank capable of applying pressure to battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321645178.2U CN220253301U (en) | 2023-06-27 | 2023-06-27 | Electrolyte tank capable of applying pressure to battery cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220253301U true CN220253301U (en) | 2023-12-26 |
Family
ID=89234169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321645178.2U Active CN220253301U (en) | 2023-06-27 | 2023-06-27 | Electrolyte tank capable of applying pressure to battery cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220253301U (en) |
-
2023
- 2023-06-27 CN CN202321645178.2U patent/CN220253301U/en active Active
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