A kind of lithium anode plate bonding mechanism

Abstract

The utility model discloses a kind of attaching mechanisms of lithium anode plate, including anode fixed plate, conducting plate, lithium anode fixed plate, air inlet part, air outlet part and multiple wires;The conducting plate is fixedly configured between the anode fixed plate and lithium anode fixed plate, first chamber is formed between the conducting plate and the anode fixed plate, second chamber is formed between the conducting plate and the lithium anode fixed plate;The air inlet part and air outlet part are communicated with the second chamber, and multiple negative pressure suction holes are provided on the lithium anode fixed plate;Multiple wires are welded with the conducting plate at one end, and the welding point of the wire is located in the first chamber;Multiple electrically-conductive connecting structures are provided between the conducting plate and the lithium anode fixed plate;The attaching mechanism of lithium anode plate uses negative pressure suction force to make lithium anode and conducting copper plate fully attached, improve the electrically-conductive consistency between lithium anode plate and conducting copper plate.

Description

Technical Field

[0001] This utility model relates to the field of electrochemical lithium replenishment technology, specifically to a bonding mechanism for a lithium anode plate. Background Technology

[0002] The existing lithium anode fixing method uses an O-ring to create a sealed cavity between the anode fixing plate and the lithium anode fixing copper plate, and also employs multi-point conduction of the electroplating power supply. However, a simple connection method is used between the lithium plate and the lithium anode fixing copper plate; during the installation of the lithium anode plate, external force is used to press the lithium plate and copper plate together.

[0003] This structure can fix the lithium plate to the copper plate, but it cannot guarantee that the entire contact surface is in a good contact state. Furthermore, in the electrochemical lithium replenishment process, the lithium plate exists as the anode in the electroplating process, forming part of the electroplating current loop. During the ionization of the lithium anode plate, the lithium anode plate heats up. Due to the different coefficients of thermal expansion of lithium and copper, the originally well-fitted lithium-copper contact surface can separate, causing localized poor contact, which in turn leads to inconsistent current density on the lithium plate surface. Since current density is the main factor in the ionization of metallic lithium into lithium ions, inconsistent current density will cause inconsistent dissolution of the lithium plate due to ionization. In areas with high current density, the lithium plate has been completely ionized, exposing metallic copper. In areas with low current density, residual metallic lithium remains. If the process is not stopped and the anode plate replaced, there is a risk that the copper plate fixing the lithium anode will also be ionized; stopping and replacing the anode plate will result in the waste of some unionized residual metallic lithium.

[0004] Therefore, it is urgent to develop a lithium anode fixing method to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a bonding mechanism for a lithium anode plate, which uses negative pressure suction to fully bond the lithium anode and the conductive copper plate, improve the conductivity consistency between the lithium anode plate and the conductive copper plate, and thus ensure the consistency of the current density of the reflective surface of the lithium anode during the electrochemical lithium replenishment process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A bonding mechanism for a lithium anode plate includes an anode fixing plate, a conductive plate, a lithium anode fixing plate, an air inlet, an air outlet, and multiple wires.

[0008] The conductive plate is fixedly disposed between the anode fixing plate and the lithium anode fixing plate, a first chamber is formed between the conductive plate and the anode fixing plate, and a second chamber is formed between the conductive plate and the lithium anode fixing plate; the first chamber and the second chamber are independent of each other.

[0009] Both the air inlet and outlet are connected to the second chamber, and the lithium anode fixing plate is provided with a plurality of negative pressure adsorption holes, which are connected to the second chamber.

[0010] One end of each of the multiple wires is welded to the conductive plate, and the welding point of the wires is located in the first cavity.

[0011] Multiple conductive connection structures are provided between the conductive plate and the lithium anode fixing plate.

[0012] The bonding mechanism for the lithium anode plate provided in at least one embodiment of this disclosure further includes multiple lithium anode pressure plates.

[0013] The lithium anode pressure plate is configured to be detachably connected to the lithium anode fixing plate.

[0014] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, a first sealing ring is provided between the conductive plate and the anode fixing plate.

[0015] The first chamber is located within the area enclosed by the first sealing ring.

[0016] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, a second sealing ring is provided between the conductive plate and the lithium anode fixing plate.

[0017] The second chamber is located within the area enclosed by the second sealing ring.

[0018] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, each welding point of the wire is paired with two of the conductive connection structures.

[0019] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, the conductive plate is fixedly connected to the lithium anode fixing plate.

[0020] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, the conductive plate and / or the lithium anode fixing plate are fixedly connected to the anode fixing plate.

[0021] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, the conductive connection structure is a conductive pad.

[0022] The conductive pad abuts against the conductive plate and the lithium anode fixing plate on both sides, respectively.

[0023] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, both the air inlet and the air outlet are quick connectors.

[0024] In the bonding mechanism of the lithium anode plate provided in at least one embodiment of this disclosure, both the conductive plate and the lithium anode fixing plate are made of copper plates.

[0025] The beneficial effects of this utility model are as follows: the negative pressure adsorption method is used to fully adhere the lithium anode to the lithium anode fixing plate, which can ensure that the electroplating current density on the surface of the lithium plate is uniform; at the same time, since the welding point of the wire is located in an independent first chamber, the welding point of the wire will not come into contact with the electroplating electrolyte, thus protecting the welding point of the wire.

[0026] The lithium anode can be prepared without cleaning the copper plate that fixes it, and the lithium anode is consumed very evenly, which saves on material and labor costs and reduces environmental pollution. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of the bonding mechanism for a lithium anode plate according to the present invention.

[0029] Figure 2 This is a top view of the bonding mechanism for a lithium anode plate according to the present invention.

[0030] Figure 3 This is a schematic diagram showing the distribution of welding points.

[0031] Figure 4 This is a partial cross-sectional view of the bonding mechanism for a lithium anode plate according to the present invention.

[0032] In the picture:

[0033] 10. Anode fixing plate; 11. First chamber;

[0034] 20. Conductive plate; 21. First sealing ring; 22. Second sealing ring;

[0035] 30. Lithium anode fixing plate; 31. Second chamber; 32. Negative pressure adsorption hole;

[0036] 40. Air intake components;

[0037] 50. Vent components;

[0038] 60. Wire; 61. Solder joint;

[0039] 70. Conductive connection structure;

[0040] 80. Lithium anode pressure plate. Detailed Implementation

[0041] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0042] Example

[0043] like Figures 1 to 4 As shown, this embodiment provides a bonding mechanism for a lithium anode plate, including an anode fixing plate 10, a conductive plate 20, a lithium anode fixing plate 30, an air inlet 40, an air outlet 50, and multiple wires 60.

[0044] In this embodiment, the conductive plate 20 is fixedly disposed between the anode fixing plate 10 and the lithium anode fixing plate 30. A first chamber 11 is formed between the conductive plate 20 and the anode fixing plate 10, and a second chamber 31 is formed between the conductive plate 20 and the lithium anode fixing plate 30. The first chamber 11 and the second chamber 31 are independent of each other.

[0045] Specifically, both the air inlet 40 and the air outlet 50 are connected to the second chamber 31, and the lithium anode fixing plate 30 is provided with a plurality of negative pressure adsorption holes 32, which are connected to the second chamber 31.

[0046] The surface of the lithium anode fixing plate 30 that contacts the lithium anode is polished. Since the surface of the lithium anode fixing plate 30 is not roughened, the lithium anode rarely sticks to the lithium anode fixing plate when there is no negative pressure, making it easy to disassemble.

[0047] Because negative pressure adsorption is used to ensure full adhesion between the lithium anode and the lithium anode fixing plate, the contact surfaces of the lithium anode and the lithium anode fixing plate are in good contact, which ensures uniform electroplating current density on the lithium plate surface.

[0048] Specifically, one end of each of the multiple wires 60 is soldered to the conductive plate 20, and the solder joints 61 of the wires 60 are located within the first chamber 11. Multiple conductive connection structures 70 are provided between the conductive plate 20 and the lithium anode fixing plate 30. Because the solder joints 61 of the wires 60 are isolated within the independent first chamber, the solder joints 61 of the wires 60 will not come into contact with the electroplating electrolyte, thus protecting the solder joints.

[0049] In this embodiment, in order to improve the assembly stability of the lithium anode, the bonding mechanism also includes multiple lithium anode pressure plates 80; the lithium anode pressure plates 80 are used to press the lithium anode and perform secondary fixation on the lithium anode.

[0050] For example, the lithium anode pressure plate 80 and the lithium anode fixing plate 30 are connected by bolts.

[0051] In this embodiment, in order to ensure that the first chamber 11 has good sealing performance, a first sealing ring 21 is provided between the conductive plate 20 and the anode fixing plate 10, and the first chamber 11 is located in the area enclosed by the first sealing ring 21.

[0052] Similarly, in order to ensure that the second chamber 31 has good sealing performance, a second sealing ring 22 is provided between the conductive plate 20 and the lithium anode fixing plate 30, and the second chamber 31 is located in the area enclosed by the second sealing ring 22.

[0053] In this embodiment, each wire 60 is paired with two conductive connection structures 70 at its solder joint, and the total conductivity of the two conductive connection structures must be more than twice that of the wire.

[0054] Specifically, the conductive connection structure 70 is a conductive pad, and the two sides of the conductive pad abut against the conductive plate 20 and the lithium anode fixing plate 30, respectively.

[0055] In this embodiment, both the air inlet 40 and the air outlet 50 are quick-connect couplings. For convenient control of the air intake and exhaust, the quick-connect couplings are connected to valves (not shown).

[0056] For example, the quick connector is provided with a threaded section, and both the anode fixing plate 10 and the conductive plate 20 are provided with a first screw hole (not shown), which communicates with the second chamber 31; the threaded section of the quick connector is screwed into the two first screw holes in sequence, thereby realizing the connection between the quick connector and the anode fixing plate 10, and the connection between the quick connector and the conductive plate 20.

[0057] In this embodiment, both the conductive plate 20 and the lithium anode fixing plate 30 are made of copper.

[0058] One connection method of the anode fixing plate 10, the lithium anode fixing plate 30 and the conductive plate 20 will be disclosed below.

[0059] Specifically, the conductive plate 20 is bolted to the lithium anode fixing plate 30, and in this connection, the bolts also pass through the conductive pads to position the conductive pads, so there are two bolts near each welding point.

[0060] Specifically, a second screw hole (not shown) is provided on the lithium anode fixing plate 30, and through holes (not shown) are provided on both the anode fixing plate 10 and the conductive plate 20. Bolts are passed through the through holes and screwed into the second screw hole to connect the anode fixing plate 10, the lithium anode fixing plate 30 and the conductive plate 20 together.

[0061] The following section will disclose the usage method of the bonding mechanism for the lithium anode plate to further explain its principle.

[0062] When it is necessary to fix the lithium anode, place the lithium anode of the cut size on the lithium anode fixing plate, then connect the negative pressure device, adjust the negative pressure value of the second chamber to between 40000Pa and 50000Pa, and use the lithium anode pressure plate to fix the lithium anode a second time.

[0063] After the lithium anode plate is completely ionized, the lithium anode pressure plate and lithium anode are removed sequentially. Compressed air is then connected via a quick connector to blow out any electrolyte that may have leaked into the second chamber and any debris that may have clogged the negative pressure adsorption pores.

[0064] Although embodiments of this application have been shown and described above, the scope of protection of this utility model is not limited thereto. Any changes or substitutions that can be conceived without inventive effort should be included within the scope of protection of this utility model. Unless expressly stated otherwise, no element, action or instruction used herein should be construed as critical or necessary.

Claims

1. A bonding mechanism for a lithium anode plate, characterized in that, include: Anode fixing plate, conductive plate, lithium anode fixing plate, air inlet component, air outlet component, and multiple wires; The conductive plate is fixedly disposed between the anode fixing plate and the lithium anode fixing plate, a first chamber is formed between the conductive plate and the anode fixing plate, and a second chamber is formed between the conductive plate and the lithium anode fixing plate; the first chamber and the second chamber are independent of each other; Both the air inlet and the air outlet are connected to the second chamber, and the lithium anode fixing plate is provided with a plurality of negative pressure adsorption holes, which are connected to the second chamber. One end of each of the multiple wires is welded to the conductive plate, and the welding point of the wires is located in the first cavity; Multiple conductive connection structures are provided between the conductive plate and the lithium anode fixing plate.

2. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, It also includes multiple lithium anode plates; The lithium anode pressure plate is configured to be detachably connected to the lithium anode fixing plate.

3. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, A first sealing ring is provided between the conductive plate and the anode fixing plate; The first chamber is located within the area enclosed by the first sealing ring.

4. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, A second sealing ring is provided between the conductive plate and the lithium anode fixing plate; The second chamber is located within the area enclosed by the second sealing ring.

5. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, Each of the solder joints of the wires is paired with two of the conductive connection structures.

6. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, The conductive plate is fixedly connected to the lithium anode fixing plate.

7. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, The conductive plate and / or lithium anode fixing plate are fixedly connected to the anode fixing plate.

8. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, The conductive connection structure is a conductive pad; The conductive pad abuts against the conductive plate and the lithium anode fixing plate on both sides, respectively.

9. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, Both the air inlet and outlet components are quick connectors.

10. The bonding mechanism for a lithium anode plate according to claim 1, characterized in that, Both the conductive plate and the lithium anode fixing plate are made of copper.

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