Battery liquid injection machine and electrode positioning method

Abstract

The invention discloses a battery liquid injection machine and an electrode positioning method.The battery liquid injection machine comprises a liquid injection assembly, a four-way valve is arranged on a liquid injection channel at the lower end of the liquid injection assembly, the upper end of the four-way valve is communicated with the liquid injection assembly, the lower end of the four-way valve is communicated with the liquid injection channel, and the four-way valve is arranged on the liquid injection channel. The left side end of the four-way valve is communicated with the liquid storage tank, the right side end of the four-way valve is communicated with the vacuumizing assembly, the liquid injection channel on the lower side of the four-way valve is sleeved with a movable electrode sleeve assembly, a battery to be injected is arranged below the liquid injection channel, and the liquid injection device has the advantages that the structure is simple, and an electrode is prevented from being affected by electrolyte.

Description

Technical Field

[0001] The present invention relates to the technical field of battery liquid injection, and in particular to a battery liquid injection machine and an electrode positioning method. Background Art

[0002] With the development of new energy technology, lithium batteries are increasingly used as power sources. Lithium batteries include a shell, a battery cell and an electrolyte, and the battery cell is arranged in the shell. After the shell is assembled and sealed, it needs to be injected with liquid to fully wet the active materials and diaphragms on the battery cell pole pieces, providing the necessary channels for the movement of ions during the charging and discharging process.

[0003] The liquid injection device is the most important equipment in the production of lithium batteries. However, the existing liquid injection machine has a complex structure, many liquid injection steps, low production efficiency, and the electrolyte easily contaminates the electrode and cannot protect the electrode.

[0004] The present application provides a battery filling machine to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing liquid injection machine has a complex structure, many liquid injection steps, low production efficiency, and the electrolyte easily contaminates the electrode and cannot protect the electrode. Therefore, a battery liquid injection machine is provided, and the battery liquid injection machine comprises: A liquid injection component, wherein a four-way valve is arranged on the liquid injection channel at the lower end of the liquid injection component, the upper end of the four-way valve is connected to the liquid injection component, the lower end of the four-way valve is connected to the liquid injection channel, the left end of the four-way valve is connected to the liquid storage tank, the right end of the four-way valve is connected to the vacuum pumping component, a movable electrode sleeve assembly is sleeved on the liquid injection channel on the lower side of the four-way valve, and a battery to be injected is arranged below the liquid injection channel.

[0006] Furthermore, it also includes a workbench, support rods are fixedly arranged on both sides of the workbench, and a mounting plate is fixedly arranged on the upper end of the support rods.

[0007] Furthermore, the liquid storage tank and the vacuum pumping assembly are both fixedly mounted on a mounting plate.

[0008] Furthermore, it also includes an up-and-down movable mechanism, a fixed portion of the up-and-down movable mechanism is fixedly mounted on the mounting plate, and a movable portion of the up-and-down movable mechanism is fixedly connected to the liquid injection assembly.

[0009] Furthermore, the injection assembly includes an injection housing and a plunger. The lower end of the injection housing is connected to the four-way valve. The plunger is arranged inside the injection housing and moves up and down along the injection housing. A sealed cavity is formed between the plunger and the injection housing.

[0010] Furthermore, the movable electrode sleeve assembly includes a fixed sleeve, which is arranged on the injection channel, and transverse support rods are fixedly arranged on both sides of the fixed sleeve. Electrode caps are sleeved on the transverse support rods, and the electrode caps move along the transverse support rods.

[0011] Furthermore, the electrode cap includes a positioning portion and a protecting portion, the positioning portion is arranged at the upper end of the protecting portion, a movable through hole is opened on the positioning portion, the movable through hole is used to be sleeved on the transverse support rod, a positioning threaded hole is opened on the positioning portion at a position perpendicular to the movable through hole, and a positioning bolt is arranged in the positioning threaded hole.

[0012] Furthermore, the protection portion of the electrode cap is provided with an electrode protection groove, and a rubber insulating protection layer is provided on the inner wall of the electrode protection groove.

[0013] On the other hand, the present application also provides an electrode positioning method for the battery liquid filling machine as described above, characterized in that it includes: Fix the battery to be filled on the workbench, and use infrared detection to detect the distance D1 from the filling point to the left electrode and the distance D2 from the filling point to the right electrode; The electrode cap at the left end is respectively controlled to be just above the left electrode, and the electrode cap at the right end is controlled to be just above the right electrode; The electrode cap is controlled to move downward by the up-and-down movable mechanism, and the electrode cap is placed on the electrode, and the injection channel is aligned with the injection point; The upper port of the four-way valve is controlled to be opened, the left port of the four-way valve is closed, the lower port of the four-way valve is closed, the right port of the four-way valve is opened, and the vacuum component is controlled to draw a vacuum into the liquid injection shell; Close the right port of the four-way valve, open the left port of the four-way valve, control the plunger to move upward, and suck the electrolyte in the liquid storage tank into the injection shell; Close the left port of the four-way valve, open the lower port of the four-way valve, control the plunger to move downward, and inject the electrolyte into the battery to be filled.

[0014] The implementation of the present invention has the following beneficial effects: 1. The present invention is convenient and reliable, simple and easy to operate, easy to manufacture, and can protect the battery electrodes and prevent the electrolyte from polluting the battery. At the same time, the position of the movable electrode sleeve assembly can be adjusted to adapt to batteries of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the battery liquid filling machine provided by the present invention; Figure 2 It is a structural schematic diagram of the movable electrode sleeve assembly provided by the present invention; Figure 3It is a flow chart provided by the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0017] Please refer to the instruction manual Figure 1-2 This embodiment provides a battery liquid filling machine, the battery liquid filling machine comprising: A liquid injection component 7, a four-way valve is arranged on the liquid injection channel at the lower end of the liquid injection component 7, the upper end of the four-way valve is connected to the liquid injection component 7, the lower end of the four-way valve is connected to the liquid injection channel, the left end of the four-way valve is connected to the liquid storage tank 9, the right end of the four-way valve is connected to the vacuum assembly 8, a movable electrode sleeve assembly 6 is sleeved on the liquid injection channel on the lower side of the four-way valve, a battery 3 to be injected is arranged below the liquid injection channel, and the connection between the four-way valve and the liquid storage tank 9 and the vacuum assembly 8 is achieved through a hose.

[0018] The liquid injection assembly 7 includes a liquid injection housing and a plunger. The lower end of the liquid injection housing is connected to the four-way valve. The plunger is arranged inside the liquid injection housing and moves up and down along the liquid injection housing. A sealed cavity is formed in the plunger and the liquid injection housing.

[0019] The movable electrode sleeve assembly 6 includes a fixed sleeve 601 , which is arranged on the injection channel. Transverse support rods 5 are fixedly arranged on both sides of the fixed sleeve 601 . Electrode caps 602 are sleeved on the transverse support rods 5 , and the electrode caps 602 move along the transverse support rods 5 .

[0020] The electrode cap 602 includes a positioning part and a protection part. The positioning part is arranged at the upper end of the protection part. A movable through hole is opened on the positioning part. The movable through hole is used to be sleeved on the transverse support rod 5. A positioning threaded hole is opened on the positioning part at a position perpendicular to the movable through hole. A positioning bolt is arranged in the positioning threaded hole.

[0021] The protection portion of the electrode cap 602 is provided with an electrode protection groove, and a rubber insulating protection layer is provided on the inner wall of the electrode protection groove.

[0022] During use, first measure the distance between the injection point and the two electrodes, adjust the position of the two electrode caps, fix them through the positioning threaded holes, put the electrode caps on the electrodes, and then align the injection channel with the injection hole of the battery to be injected. Keep the upper port of the four-way valve open, close the left and lower ports, open the right port, and use the vacuum assembly to evacuate the injection shell, close the right port of the four-way valve, open the left port, move the plunger upward to suck the electrolyte in the storage tank, close the left port of the four-way valve, open the lower port, move the plunger downward, and inject the electrolyte into the battery to be injected. Example

[0023] Please refer to the instruction manual Figure 1-2 This embodiment provides a battery liquid filling machine, the battery liquid filling machine comprising: A liquid injection component 7, a four-way valve is arranged on the liquid injection channel at the lower end of the liquid injection component 7, the upper end of the four-way valve is connected to the liquid injection component 7, the lower end of the four-way valve is connected to the liquid injection channel, the left end of the four-way valve is connected to the liquid storage tank 9, the right end of the four-way valve is connected to the vacuum assembly 8, a movable electrode sleeve assembly 6 is sleeved on the liquid injection channel on the lower side of the four-way valve, a battery 3 to be injected is arranged below the liquid injection channel, and the connection between the four-way valve and the liquid storage tank 9 and the vacuum assembly 8 is achieved through a hose.

[0024] It also includes a workbench 2 , on both sides of which support rods 4 are fixedly arranged, and on the upper ends of the support rods 4 a mounting plate 1 is fixedly arranged.

[0025] The liquid storage tank 9 and the vacuum pumping assembly 8 are both fixedly mounted on the mounting plate 1 .

[0026] It also includes an up-and-down movable mechanism, a fixed portion of which is fixedly mounted on the mounting plate 1 , and a movable portion of which is fixedly connected to the liquid injection assembly 7 .

[0027] The liquid injection assembly 7 includes a liquid injection housing and a plunger. The lower end of the liquid injection housing is connected to the four-way valve. The plunger is arranged inside the liquid injection housing and moves up and down along the liquid injection housing. A sealed cavity is formed in the plunger and the liquid injection housing.

[0028] The movable electrode sleeve assembly 6 includes a fixed sleeve 601 , which is arranged on the injection channel. Transverse support rods 5 are fixedly arranged on both sides of the fixed sleeve 601 . Electrode caps 602 are sleeved on the transverse support rods 5 , and the electrode caps 602 move along the transverse support rods 5 .

[0029] The electrode cap 602 includes a positioning part and a protection part. The positioning part is arranged at the upper end of the protection part. A movable through hole is opened on the positioning part. The movable through hole is used to be sleeved on the transverse support rod 5. A positioning threaded hole is opened on the positioning part at a position perpendicular to the movable through hole. A positioning bolt is arranged in the positioning threaded hole.

[0030] The protection portion of the electrode cap 602 is provided with an electrode protection groove, and a rubber insulating protection layer is provided on the inner wall of the electrode protection groove.

[0031] On the other hand, this embodiment also provides an electrode positioning method, which is used in the battery liquid filling machine as described above, and is characterized by comprising: Fix the battery to be filled on the workbench, and use infrared detection to detect the distance D1 from the filling point to the left electrode and the distance D2 from the filling point to the right electrode; The electrode cap at the left end is respectively controlled to be just above the left electrode, and the electrode cap at the right end is controlled to be just above the right electrode; The electrode cap is controlled to move downward by the up-and-down movable mechanism, and the electrode cap is placed on the electrode, and the injection channel is aligned with the injection point; The upper port of the four-way valve is controlled to be opened, the left port of the four-way valve is closed, the lower port of the four-way valve is closed, the right port of the four-way valve is opened, and the vacuum component is controlled to draw a vacuum into the liquid injection shell; Close the right port of the four-way valve, open the left port of the four-way valve, control the plunger to move upward, and suck the electrolyte in the liquid storage tank into the injection shell; Close the left port of the four-way valve, open the lower port of the four-way valve, control the plunger to move downward, and inject the electrolyte into the battery to be filled.

[0032] During use, first measure the distance between the injection point and the two electrodes, adjust the position of the two electrode caps, fix them through the positioning threaded holes, put the electrode caps on the electrodes, and then align the injection channel with the injection hole of the battery to be injected. The action of setting the electrode caps and aligning the injection channel can be completed by the upper and lower movable mechanisms. In the present application, the upper and lower movable mechanisms can be electric telescopic rods, the upper side port of the four-way valve remains open, the left side port and the lower side port are closed, the right side port is opened, and the injection shell is evacuated by the vacuum assembly, the right side port of the four-way valve is closed, the left side port is opened, the plunger is moved up to suck the electrolyte in the liquid storage tank, the left side port of the four-way valve is closed, the lower side port is opened, the plunger is moved down, and the electrolyte is injected into the battery to be injected.

[0033] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery filling machine, characterized in that: include: A liquid injection component, wherein a four-way valve is arranged on the liquid injection channel at the lower end of the liquid injection component, the upper end of the four-way valve is connected to the liquid injection component, the lower end of the four-way valve is connected to the liquid injection channel, the left end of the four-way valve is connected to the liquid storage tank, the right end of the four-way valve is connected to the vacuum pumping component, a movable electrode sleeve assembly is sleeved on the liquid injection channel on the lower side of the four-way valve, and a battery to be injected is arranged below the liquid injection channel.

2. The battery filling machine according to claim 1, characterized in that: It also includes a workbench, on both sides of which support rods are fixedly arranged, and on the upper ends of the support rods a mounting plate is fixedly arranged.

3. The battery filling machine according to claim 2, characterized in that: The liquid storage tank and the vacuum pumping assembly are both fixedly mounted on a mounting plate.

4. The battery liquid filling machine according to claim 3, characterized in that: It also includes an up-and-down movable mechanism, a fixed portion of which is fixedly mounted on the mounting plate, and a movable portion of which is fixedly connected to the liquid injection assembly.

5. The battery filling machine according to claim 4, characterized in that: The liquid injection assembly includes a liquid injection housing and a plunger. The lower end of the liquid injection housing is connected to the four-way valve. The plunger is arranged inside the liquid injection housing and moves up and down along the liquid injection housing. A sealed cavity is formed between the plunger and the liquid injection housing.

6. The battery liquid filling machine according to claim 5, characterized in that: The movable electrode sleeve assembly comprises a fixed sleeve, which is arranged on the injection channel, and transverse support rods are fixedly arranged on both sides of the fixed sleeve, and electrode caps are sleeved on the transverse support rods, and the electrode caps move along the transverse support rods.

7. The battery liquid filling machine according to claim 6, characterized in that: The electrode cap includes a positioning part and a protection part, wherein the positioning part is arranged at the upper end of the protection part, a movable through hole is provided on the positioning part, and the movable through hole is used to be sleeved on the transverse support rod, and a positioning threaded hole is provided on the positioning part at a position perpendicular to the movable through hole, and a positioning bolt is provided in the positioning threaded hole.

8. The battery liquid filling machine according to claim 7, characterized in that: The protection part of the electrode cap is provided with an electrode protection groove, and the inner wall of the electrode protection groove is provided with a rubber insulating protection layer.

9. An electrode positioning method, used in the battery liquid filling machine according to any one of claims 1 to 8, characterized in that: include: Fix the battery to be filled on the workbench, and use infrared detection to detect the distance D1 from the filling point to the left electrode and the distance D2 from the filling point to the right electrode; The electrode cap at the left end is respectively controlled to be just above the left electrode, and the electrode cap at the right end is controlled to be just above the right electrode; The electrode cap is controlled to move downward by the up-and-down movable mechanism, and the electrode cap is placed on the electrode, and the injection channel is aligned with the injection point; The upper port of the four-way valve is controlled to be opened, the left port of the four-way valve is closed, the lower port of the four-way valve is closed, the right port of the four-way valve is opened, and the vacuum component is controlled to draw a vacuum into the liquid injection shell; Close the right port of the four-way valve, open the left port of the four-way valve, control the plunger to move upward, and suck the electrolyte in the liquid storage tank into the injection shell; Close the left port of the four-way valve, open the lower port of the four-way valve, control the plunger to move downward, and inject the electrolyte into the battery to be filled.

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