Overall imbibition testing device for aqueous sodium-ion battery cell in vacuum state

Abstract

The utility model discloses an integral liquid absorption testing device for a water system sodium ion battery cell in a vacuum state, which comprises a cell positioning mechanism and an electrolyte container, and the cell positioning mechanism comprises a positioning bottom plate, a pressurizing top plate, a plurality of positioning columns and a plurality of connecting bolts. The bottom ends of the positioning columns and the bottom ends of the connecting bolts are arranged on the periphery of the positioning bottom plate. A plurality of positioning column inserting holes and a plurality of connecting bolt inserting holes are formed in the pressurizing top plate; a battery cell placing cavity is formed by a space defined by the positioning bottom plate, the pressurizing top plate, the plurality of positioning columns and the plurality of connecting bolts; the cell positioning mechanism and the aqueous sodium-ion battery cell in the cell positioning mechanism are placed in the electrolyte container, and the electrolyte container is provided with a vacuumizing interface. The device for testing the integral liquid absorption of the water-based sodium ion battery cell in the vacuum state can evaluate the liquid absorption state of the water-based sodium ion battery cell in the actual vacuum state in advance, and can ensure the consistency of the capacity and the efficiency of the battery.

Description

Technical Field

[0001] The utility model relates to an overall liquid absorption testing device for a water-based sodium ion battery cell in a vacuum state. Background Art

[0002] During the production process of aqueous sodium-ion battery chips, they need to be injected with liquid under vacuum conditions after assembly. However, it is impossible to know in advance the amount of liquid absorbed by the entire battery cell under pressure, which will affect the consistency of the battery's capacity and efficiency after assembly and cannot meet shipment requirements. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an overall liquid absorption test device for an aqueous sodium ion battery cell under a vacuum state, which can evaluate the liquid absorption state of the aqueous sodium ion battery cell under actual vacuum conditions in advance and ensure the consistency of the battery capacity and efficiency.

[0004] The technical solution to achieve the above purpose is: a device for testing the overall liquid absorption of an aqueous sodium ion battery cell under vacuum, comprising a cell positioning mechanism and an electrolyte container, wherein the cell positioning mechanism comprises a positioning bottom plate, a pressurized top plate, a plurality of positioning columns and a plurality of connecting bolts, wherein:

[0005] The bottom ends of the plurality of positioning columns and the plurality of connecting bolts are respectively arranged around the positioning base plate;

[0006] The pressurized top plate is provided with a plurality of positioning column insertion holes and a plurality of connecting bolt insertion holes;

[0007] The top ends of the plurality of positioning posts are passed through the plurality of positioning post insertion holes on the pressurized top plate in a one-to-one correspondence;

[0008] The top ends of the plurality of connecting bolts pass through the plurality of connecting bolt insertion holes on the pressurized top plate one by one, and the top end of each connecting bolt is locked by a locking nut;

[0009] The space surrounded by the positioning bottom plate, the pressurizing top plate, the plurality of positioning columns and the plurality of connecting bolts constitutes a battery cell placement cavity, and the aqueous sodium ion battery cell is arranged in the battery cell placement cavity;

[0010] The battery cell positioning mechanism and the aqueous sodium ion battery cell therein are placed in the electrolyte container, and the electrolyte container has a vacuum extraction interface.

[0011] The above-mentioned overall liquid absorption test device for an aqueous sodium ion battery cell under vacuum state, wherein the electrolyte container is injected with electrolyte.

[0012] In the above-mentioned overall liquid absorption test device for an aqueous sodium-ion battery cell under vacuum, the vacuum pumping interface of the electrolyte container is externally connected to a vacuum pumping device.

[0013] The above-mentioned overall liquid absorption test device for an aqueous sodium-ion battery cell under a vacuum state, wherein the number of the positioning columns is six and the number of the connecting bolts is four.

[0014] The overall liquid absorption test device of the aqueous sodium ion battery cell under vacuum state of the utility model can evaluate the liquid absorption state of the aqueous sodium ion battery cell under actual vacuum state in advance, and can ensure the consistency of battery capacity and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the overall liquid absorption test device of the aqueous sodium ion battery cell under vacuum state of the utility model. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the technical solution of the utility model, the specific implementation method thereof is described in detail below in conjunction with the accompanying drawings:

[0017] See also Figure 1 The best embodiment of the utility model is a device for testing the overall liquid absorption of an aqueous sodium-ion battery cell under vacuum, comprising a cell positioning mechanism and an electrolyte container 1, wherein the cell positioning mechanism comprises a positioning base plate 2, a pressurized top plate 3, a plurality of positioning columns 4 and a plurality of connecting bolts 5. In this embodiment, the number of the positioning columns 4 is six, and the number of the connecting bolts 5 is four. The bottom ends of the six positioning columns 4 and the four connecting bolts 5 are respectively arranged around the positioning base plate 2; a corresponding number of positioning column sockets and connecting bolt sockets are provided on the pressurized top plate 3; the top ends of the six positioning columns 4 pass through the six positioning column sockets on the pressurized top plate 3 one by one; the top ends of the four connecting bolts 5 pass through the four connecting bolt sockets on the pressurized top plate 3 one by one, and the top end of each connecting bolt 5 is locked by a locking nut 6.

[0018] The space enclosed by the positioning bottom plate 2, the pressurized top plate 3, the plurality of positioning columns 4 and the plurality of connecting bolts 5 constitutes a battery cell placement cavity, in which the aqueous sodium ion battery cell 100 is arranged; the battery cell positioning mechanism and the aqueous sodium ion battery cell therein are placed in the electrolyte container 1, and the electrolyte container 1 has a vacuum extraction interface. Electrolyte is injected into the electrolyte container 1. The vacuum extraction interface of the electrolyte container 1 is externally connected to a vacuum extraction device, and the inside of the electrolyte container 1 is vacuumed by the vacuum extraction device, simulating the injection of liquid into the battery cell under vacuum conditions.

[0019] The overall liquid absorption test device of the aqueous sodium ion battery cell under vacuum state of the utility model has the following working principle when in use: firstly, the weighed stacked part of the battery cell is placed in the battery cell placement cavity of the battery cell positioning mechanism for limiting, and then the pressure block is placed, and the connecting bolt 5 is locked by the locking nut 6; then the locked battery cell is placed as a whole in the electrolyte container 1 containing electrolyte, and vacuum is drawn, and the battery cell absorbs liquid under vacuum state; after the liquid absorption is completed, the battery cell is disassembled, and the battery cell after the liquid absorption is weighed to confirm the liquid absorption state, so that the liquid absorption state of the aqueous sodium ion battery cell under the actual vacuum state can be evaluated in advance, and the liquid absorption amount of the battery cell under pressure state can be evaluated, so as to improve the consistency of the capacity and efficiency of the assembled battery.

[0020] The overall liquid absorption test device of the aqueous sodium ion battery cell under vacuum state of the utility model can evaluate the liquid absorption state of the aqueous sodium ion battery cell under actual vacuum state in advance, and can ensure the consistency of battery capacity and efficiency.

[0021] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A device for testing the overall liquid absorption of an aqueous sodium ion battery cell under vacuum, characterized in that: It includes a battery cell positioning mechanism and an electrolyte container, wherein the battery cell positioning mechanism includes a positioning bottom plate, a pressurized top plate, a plurality of positioning columns and a plurality of connecting bolts, wherein: The bottom ends of the plurality of positioning columns and the plurality of connecting bolts are respectively arranged around the positioning base plate; The pressurized top plate is provided with a plurality of positioning column insertion holes and a plurality of connecting bolt insertion holes; The top ends of the plurality of positioning posts are passed through the plurality of positioning post insertion holes on the pressurized top plate in a one-to-one correspondence; The top ends of the plurality of connecting bolts pass through the plurality of connecting bolt insertion holes on the pressurized top plate one by one, and the top end of each connecting bolt is locked by a locking nut; The space surrounded by the positioning bottom plate, the pressurizing top plate, the plurality of positioning columns and the plurality of connecting bolts constitutes a battery cell placement cavity, and the aqueous sodium ion battery cell is arranged in the battery cell placement cavity; The battery cell positioning mechanism and the aqueous sodium ion battery cell therein are placed in the electrolyte container, and the electrolyte container has a vacuum extraction interface.

2. The overall liquid absorption test device for aqueous sodium ion battery cells under vacuum state according to claim 1, characterized in that: The electrolyte container is filled with electrolyte.

3. The overall liquid absorption test device for aqueous sodium ion battery cells under vacuum state according to claim 1, characterized in that: The vacuum pumping interface of the electrolyte container is externally connected to a vacuum pumping device.

4. The overall liquid absorption test device for aqueous sodium ion battery cells under vacuum state according to claim 1, characterized in that: The number of the positioning columns is six, and the number of the connecting bolts is four.

Images