Battery exhaust and liquid injection device, battery, soft package battery process and square shell battery process

Abstract

The invention provides a battery exhaust and liquid injection device, a battery, a soft package battery process and a square shell battery process, the battery exhaust and liquid injection device comprises a liquid injector, the liquid injector is provided with a closed inner cavity, an atomization hole and an inlet, the atomization hole is communicated with the inner cavity, and the inlet is communicated with the inner cavity; and the first control valve is arranged in the inner cavity, the first control valve is connected between the atomization hole and the inlet, and the first control valve is used for connecting or disconnecting the atomization hole and the inlet. According to the battery exhaust and liquid injection device, exhaust and liquid injection are performed on the battery through the battery exhaust and liquid injection device, and communication or sealing between the inside of the battery and the outside is controlled by the first control valve, so that secondary sealing operation of the battery is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a battery exhaust and liquid injection device. Background Art

[0002] Lithium batteries require exhaust during manufacture and use. For example, lithium batteries with layered lithium-rich cathode materials have the advantages of low cost, good stability and safety, so they are widely used in the manufacture of lithium batteries. However, lithium batteries made with layered lithium-rich cathode materials will generate gas during use. The generated gas accumulates in the sealed battery, affecting the battery performance and safety.

[0003] In the prior art, an opening is required on the battery shell to discharge the gas. After the battery is exhausted, the opening needs to be sealed to prevent the risk of leakage during battery use. The operation of sealing the opening during battery manufacturing affects the production efficiency of the battery. Summary of the invention

[0004] The invention provides a battery exhaust and liquid injection device, which is used to solve the problem in the prior art that the battery needs to be opened for exhaust and then sealed during the battery manufacturing process.

[0005] The present invention provides a battery exhaust and liquid injection device, comprising: An injector, wherein the injector is provided with a closed inner cavity, an atomizing hole and an inlet, wherein the atomizing hole is in communication with the inner cavity, and the inlet is in communication with the inner cavity; A first control valve is disposed in the inner cavity, and the first control valve is connected between the atomization hole and the inlet, and is used to open or close the connection between the atomization hole and the inlet.

[0006] According to a battery exhaust and liquid injection device provided by the present invention, the liquid injector is provided with a plurality of atomization holes, and the plurality of atomization holes are arranged along the outer circle of the liquid injector.

[0007] According to a battery exhaust and liquid injection device provided by the present invention, the battery exhaust and liquid injection device also includes a connecting pipe, which is connected to the liquid injector and is used to connect to an external device, and the connecting pipe is communicated with the inlet.

[0008] According to a battery exhaust and liquid injection device provided by the present invention, the battery exhaust and liquid injection device further comprises an injection ring, and the injection ring is arranged on a side of the liquid injector close to the inlet.

[0009] According to a battery exhaust and liquid injection device provided by the present invention, the first control valve includes a valve body and a driving member, the valve body closes the inlet and is connected to the liquid injector by snap-fitting, one end of the driving member is connected to the liquid injector, and the other end of the driving member is connected to the valve body.

[0010] According to a battery exhaust and liquid injection device provided by the present invention, the driving member is a compression spring.

[0011] According to a battery exhaust and liquid injection device provided by the present invention, the battery exhaust and liquid injection device further includes a second control valve, and the second control valve is arranged in the connecting pipe.

[0012] According to another embodiment of the present invention, a battery is provided, comprising a shell and the battery exhaust and liquid injection device as described above, wherein the shell is provided with a through hole, the battery exhaust and liquid injection device is arranged at the through hole and connected to the shell, and the battery exhaust and liquid injection device is connected to the housing cavity of the shell through an atomization hole.

[0013] According to another embodiment of the present invention, a soft-pack battery manufacturing process is provided, comprising: The raw materials are evenly coated on the rib plate and then rolled to form the pole piece; Assembling the manufactured pole piece with the shell, and then drying the pole piece; Injecting electrolyte into the shell, and then sealing the shell to form a soft pack battery; Pre-charge the soft-pack battery and then divide the capacity.

[0014] According to another embodiment of the present invention, a square shell battery manufacturing process is provided, comprising: The raw materials are evenly coated on the rib plate and then rolled to form the pole piece; Assembling the manufactured pole piece with the shell, and then drying the pole piece; Injecting electrolyte into the shell to form a square shell battery; Pre-charge and exhaust the square shell battery; Add electrolyte to the square shell battery and then divide the capacity.

[0015] The present invention provides a battery exhaust and liquid injection device, which is provided with an injector, and the injector is arranged in the battery. The injector is provided with an atomization hole and an inner cavity, and the inner cavity of the injector is connected with the liquid storage cavity of the battery through the atomization hole. At the same time, the injector is also provided with an inlet, which is arranged on the outside of the battery and is also connected with the inner cavity. A first control valve is provided between the inner cavity and the inlet, and the connection or sealing between the inner cavity and the inlet is controlled by the first control valve. Because the liquid storage cavity of the battery is connected with the inner cavity, and the inner cavity is connected with the inlet, the liquid storage cavity of the battery is connected with the inlet. The battery's liquid storage cavity is controlled to be connected or sealed by the first control valve, so that the battery's liquid storage cavity is exhausted or electrolyte is injected, which avoids the complicated operation of opening and sealing the battery, thereby improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the battery exhaust and liquid injection device provided by the present invention.

[0018] Figure 2 yes Figure 1 Cross-sectional view at AA in the middle.

[0019] Figure 3 It is an assembly effect diagram of the battery exhaust and liquid injection device and the soft-pack battery provided by the present invention.

[0020] Figure 4 The figure is an assembly effect diagram of the battery exhaust and liquid injection device and the square shell battery provided by the present invention.

[0021] Reference numerals: 1. Liquid injector; 11. Inner cavity; 12. Atomization hole; 13. Inlet; 2. first control valve; 21. valve body; 22. driving member; 3. Connecting pipe; 4. Second control valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0023] Combine the following Figure 1 A battery exhaust and liquid injection device of the present invention is described, comprising: a liquid injector 1 and a first control valve 2. The liquid injector 1 is provided with a closed inner cavity 11, an atomization hole 12 and an inlet 13, the atomization hole 12 is communicated with the inner cavity 11, and the inlet 13 is communicated with the inner cavity 11. The first control valve 2 is provided in the inner cavity 11, and the first control valve 2 is connected between the atomization hole 12 and the inlet 13.

[0024] like Figure 1 As shown, because the injector 1 is used to exhaust or inject liquid into the battery, an atomization hole 12 and an inlet 13 are respectively provided on different sides of the injector 1 to connect the liquid storage chamber in the battery with the outside world. One of the atomization hole 12 and the inlet 13 is arranged in the battery and connected to the liquid storage chamber of the battery, and the other is connected to the outside world. In this embodiment, the side of the injector 1 with the atomization hole 12 is arranged in the battery, and the side of the injector 1 with the inlet 13 is arranged outside the battery. Because the injector 1 needs to exhaust the gas in the battery, the atomization hole 12 also needs to be connected to the inlet 13. In this embodiment, an inner cavity 11 is opened inside the injector 1, the atomization hole 12 is connected to the inner cavity 11, and the inlet 13 is also connected to the inner cavity 11. The inner cavity 11 is a cavity that can allow liquid or gas to circulate. Therefore, the atomization hole 12 and the inlet 13 are connected to each other through the inner cavity 11.

[0025] At the same time, the battery does not need to be vented all the time, nor does it need to be replenished with electrolyte all the time. During the normal operation of the battery or the testing process of the battery, the battery needs to be kept sealed to avoid leakage and to prevent the normal operation of the battery from being affected. Therefore, in this embodiment, a first control valve 2 is provided in the injector 1. The atomization hole 12 is connected to the liquid storage chamber of the battery, and then connected to the inlet 13 through the inner cavity 11, and then the liquid storage chamber of the battery is connected to the outside world through the inlet 13. Therefore, in this embodiment, the first control valve 2 is provided in the inner cavity 11, so that the connection or closure of the atomization hole 12 and the inlet 13 is controlled by the first control valve 2.

[0026] Place the side of the injector 1 with the atomizing hole 12 into the battery, and seal the connection between the injector 1 and the battery to prevent gas or electrolyte from leaking from the connection. When the battery needs to be vented, first disconnect the battery to ensure the safety of the battery. Then start the first control valve 2, so that the first control valve 2 is in an open state, so that the inner cavity 11 is in a state of circulation, and the atomizing hole 12 and the inlet 13 are connected to each other through the inner cavity 11. At this time, because gas is generated inside the battery, resulting in a high internal air pressure, after the atomizing hole 12 and the inlet 13, the gas in the battery flows along the atomizing hole 12 through the inner cavity 11 to the inlet 13. Under normal circumstances, the inlet 13 can be directly connected to the atmosphere so that the gas in the battery flows into the atmosphere. In different embodiments, in order to avoid the gas generated in the battery from being discharged into the atmosphere and causing pollution, the inlet 13 can also be connected to the remaining purification equipment.

[0027] Similarly, when the electrolyte inside the battery is consumed and the battery needs to be replenished with electrolyte, the battery also needs to be powered off first. Then start the first control valve 2 and put the first control valve 2 in an open state, so that the inner cavity 11 is in a flowable state, and the atomization hole 12 and the inlet 13 are connected to each other through the inner cavity 11. Connect the inlet 13 to the injection device, and the injection device injects the electrolyte into the battery along the inlet 13. When the injection device completes the injection of the electrolyte, put the first control valve 2 in a closed state, and disconnect the connection between the atomization hole 12 and the inlet 13 through the first control valve 2, so that the battery's liquid storage chamber remains sealed. Then disconnect the inlet 13 from the injection device and remove the injection device.

[0028] In this embodiment, the liquid storage chamber of the battery can be connected to the outside world through the liquid injector 1, and a first control valve 2 is provided in the liquid injector 1, and the connection or closure of the liquid storage chamber of the battery with the outside world is controlled by the first control valve 2. The whole operation process is simple and convenient, and can be used continuously. Compared with the operation of opening first and then sealing in the existing production technology process, the battery exhaust and liquid injection device provided by the present application can effectively improve work efficiency.

[0029] In one embodiment, the liquid injector 1 is provided with a plurality of atomization holes 12 , and the plurality of atomization holes 12 are arranged along the outer circle of the liquid injector 1 .

[0030] like Figure 1 As shown, the portion of the injector 1 located inside the battery is provided with an atomization hole 12, and in this embodiment, the atomization hole 12 is provided on the side of the injector 1. Along the side of the injector 1, a plurality of atomization holes 12 are provided on the injector 1. Preferably, the plurality of atomization holes 12 are arranged at equal intervals and symmetrically. The plurality of atomization holes 12 are all connected to the inner cavity 11, so the inlet 13 can also be connected to the plurality of atomization holes 12.

[0031] When the electrolyte in the battery is consumed and the battery needs to be replenished, the battery also needs to be powered off first. Then start the first control valve 2 and make the first control valve 2 in an open state, so that the inner cavity 11 is in a flowable state, and the multiple atomization holes 12 are connected to the inlet 13 through the inner cavity 11. Connect the inlet 13 to the injection device, and the injection device injects the electrolyte into the battery along the inlet 13. After the electrolyte enters the inner cavity 11 along the inlet 13, the electrolyte flows into the battery along the multiple atomization holes 12 in a dispersed manner. The electrolyte, which was originally a main stream, disperses and flows into multiple atomization holes 12 to form multiple tributaries. Compared with the electrolyte form of a main stream, the total surface area formed by the electrolyte after being dispersed into multiple tributaries is larger than the surface area of ​​the main stream electrolyte form.

[0032] Therefore, in this embodiment, by opening a plurality of atomization holes 12, the surface area of ​​the electrolyte is increased. When the surface area of ​​the electrolyte increases, the contact area between the electrolyte and the materials such as the battery internal plates is also increased, thereby improving the penetration efficiency of the electrolyte and improving the injection efficiency. Preferably, the total cross-street area formed by adding the cross-sectional areas of the plurality of atomization holes 12 is greater than or equal to the cross-sectional area at the inlet 13, ensuring that the electrolyte flowing in from the inlet 13 can flow out smoothly from the plurality of atomization holes 12 without clogging. The cross-sectional area of ​​a single atomization hole 12 needs to be selected according to the actual situation, and the smaller the better. When the cross-sectional area of ​​a single atomization hole 12 is too small, the flow rate of the electrolyte will be reduced, thereby reducing the injection efficiency. Therefore, the cross-sectional area of ​​a single atomization hole 12 needs to be selected within an appropriate range.

[0033] Furthermore, in the present embodiment, the shape of the injector 1 is a drum shape, that is, the side of the injector 1 is an arc surface. Because the area of ​​the arc surface of the injector 1 is large, the atomization hole 12 is opened on the arc surface of the injector 1. Designing the injector 1 to be drum-shaped can enable the injector 1 to have a larger side surface area at the same height. Only when the side surface area of ​​the injector 1 is large enough can enough atomization holes 12 be opened. Because the thickness of the battery is limited, such as a soft-pack battery, the thickness is small, and the part of the injector 1 with the atomization hole 12 needs to be placed in the battery, the thickness (ie, height) of the injector 1 corresponds to the thickness of the battery, so the thickness (ie, height) of the injector 1 is also small. Then the drum-shaped injector 1 in the present embodiment can ensure that the injector 1 can have enough atomization holes 12 when the thickness is limited, so as to achieve the effect of atomizing and diverting the electrolyte. The liquid injector 1 is approximately drum-shaped, but is not limited thereto. In different embodiments, a cylindrical shape or the like may also be selected.

[0034] In one embodiment, the battery exhaust and liquid injection device further includes a connecting pipe 3 , which is connected to the liquid injector 1 and communicates with the inlet 13 .

[0035] Please refer to Figure 1 and Figure 2 In this embodiment, a connecting tube 3 is also provided. The connecting tube 3 is provided outside the battery and connected to the injector 1 through the inlet 13. In this embodiment, the connecting tube 3 and the injector 1 are connected by threads. In different embodiments, different connection methods can also be selected to ensure that the connection between the connecting tube 3 and the injector 1 is stable and sealed. An internal thread is provided inside the injector 1, and an external thread is provided outside the connecting tube 3. The connecting tube 3 is connected to the injector 1 by threads.

[0036] However, the thread length of the connecting tube 3 is greater than the thread length of the injector 1, that is, after the connecting tube 3 is threadedly connected to the injector 1, part of the thread on the connecting tube 3 is exposed outside the injector 1. Then, after the connecting tube 3 is connected to the injector 1, it can also be connected to other devices through the connecting tube 3. In this embodiment, only one connection method is provided. In different embodiments, the connecting tube 3 can be welded to the injector 1, and then threads are set on the outer surface of the connecting tube 3, and connected to other devices through the external threads of the connecting tube 3. However, it is necessary to ensure the sealing of the connection between the connecting tube 3 and the injector 1, as well as the sealing of the connecting tube 3 when it is connected to other devices.

[0037] In one embodiment, the battery exhaust and liquid injection device further includes an injection ring, which is arranged on one side of the liquid injector 1 close to the inlet 13 .

[0038] Please refer to Figure 3 and Figure 4 , the portion of the injector 1 with the atomizing hole 12 needs to be arranged inside the battery, and the portion with the inlet 13 needs to be arranged outside the battery, so the injector 1 is passed through the outer shell of the battery. In this embodiment, the connection between the battery and the injector 1 needs to ensure sealing. Therefore, an injection molding ring is provided on the injector 1, and the injector 1 is connected to the outer shell of the battery through the injection molding ring. After the injector 1 is passed through the outer shell of the battery, it is connected to the outer shell of the battery through the injection molding ring. The injection molding ring is a thermoplastic material. The injection molding ring is first heated so that the injection molding ring covers the gap between the injector 1 and the battery shell, and then the injection molding ring is cooled to form a seal.

[0039] In different embodiments, the liquid injector 1 and the battery shell can also be directly designed as thermoplastic materials. Then, the connection between the liquid injector 1 and the battery shell can be directly heated, and the liquid injector 1 and the battery shell itself are sealed.

[0040] In one embodiment, the first control valve 2 includes a valve body 21 and a driving member 22. The valve body 21 closes the inlet 13 and is connected to the injector 1 by snapping. One end of the driving member 22 is connected to the injector 1, and the other end of the driving member 22 is connected to the valve body 21. In one embodiment, the driving member 22 is a compression spring.

[0041] like Figure 2 As shown, in this embodiment, the first control valve 2 is connected to the injector 1 through the valve body 21. Preferably, in this embodiment, the first control valve 2 is a conical valve, that is, the valve body 21 is conical. Figure 2 As shown, a valve seat corresponding to the valve body 21 is provided at the inlet 13 of the liquid injector 1. One end of the driving member 22 is fixedly connected to the liquid injector 1, and the other end is connected to the valve body 21, and the connection between the valve body 21 and the valve seat at the inlet 13 is controlled by the driving member 22. Because the first control valve 2 is arranged in the inner cavity 11, the driving member 22 is arranged in the inner cavity 11 and fixedly connected to the inner wall of the liquid injector 1. The driving end of the driving member 22 is connected to the valve body 21, and under the drive of the driving member 22, the valve body 21 is moved toward the valve seat at the inlet 13 until the valve body 21 abuts against the valve seat to complete the sealing. Because the valve body 21 is conical, and the shape of the valve seat corresponds to that of the valve body 21, the valve body 21 can fit with the valve seat under the drive of the driving member 22.

[0042] When it is necessary to disconnect the inlet 13 from the atomization hole 12 and maintain the seal of the battery, the driver 22 drives the valve body 21 to move toward the valve seat until it abuts against the valve seat to seal. Because the injector 1 is fixedly connected to the outer shell of the battery, the injector 1 and the battery remain relatively fixed. The fixed end of the driver 22 is fixedly connected to the inner wall of the injector 1, so the fixed end of the driver 22 and the injector 1 remain relatively fixed. When the driver 22 is driven, the injector 1 provides sufficient support to ensure the stability of the abutment between the valve body 21 and the valve seat and the stability of the seal.

[0043] When the inlet 13 and the atomization hole 12 need to be connected to each other to inject liquid or exhaust gas into the battery, the driving member 22 drives the valve body 21 to move away from the valve seat, so that a gap is generated between the valve body 21 and the valve seat, thereby opening the inlet 13. At this time, the gas in the battery enters the inner cavity 11 along the atomization hole 12, and then flows from the inlet 13 to the outside along the gap between the valve body 21 and the valve seat, thereby achieving the effect of exhausting the battery.

[0044] In this embodiment, the driving member 22 is a spring. When the inlet 13 and the atomizing hole 12 need to be connected to each other to inject or exhaust the battery, the negative pressure inside the battery can be used to drive the valve body 21 to move away from the valve seat, or the gravity of the electrolyte can be used to drive the valve body 21 to move away from the valve seat, so that the inlet 13 is opened.

[0045] By driving through the elastic force of the spring itself, the power source can be saved. In addition, the driving member 22 is arranged in the inner cavity 11, and the electrolyte needs to be supplied for circulation. If a motor or the like is used as a power source for driving, it is also necessary to avoid contact between the motor and the electrolyte, ensure the sealing of the motor, and prevent the motor from short-circuiting and other faults. In this embodiment, after the driving member 22 is made of a spring, there is no need to worry about short-circuiting and other faults caused by contact between the spring and the electrolyte. The driving member 22 is made of corrosion-resistant material to avoid corrosion by the electrolyte and protect the driving member 22.

[0046] In one embodiment, the battery exhaust and liquid injection device further includes a second control valve 4 , which is disposed in the connecting pipe 3 .

[0047] like Figure 2 As shown, a second control valve 4 is also provided in the connecting pipe 3. Because the connecting pipe 3 needs to be connected to other equipment, it is also necessary to ensure that the sealing of the connecting pipe 3 when connected to the other equipment can be controlled. After the connecting pipe 3 is connected to the inlet 13 of the injector 1, it is connected to the other equipment through the thread on the outside of the connecting pipe 3. For example, when the battery needs to be injected, the injection equipment is connected to the connecting pipe 3. Because the second control valve 4 is provided in the connecting pipe 3, after the connecting pipe 3 is connected to the injection equipment, the injection equipment will not inject liquid immediately, and it is necessary to wait for the second control valve 4 to open the connection with the inlet 13 before injection can be performed.

[0048] Because the driving direction of the driving member 22 in the first control valve 2 is opposite to the injection direction, that is, the driving member 22 is driven upward and the electrolyte flows downward, the electrolyte can open the seal of the first control valve 2 under the drive of the injection device, and thus smoothly enter the battery. After the injection is completed, the second control valve 4 is used to seal, ensuring that the injection device can be disconnected under a sealed condition.

[0049] The present invention also provides a battery, including a shell and the battery exhaust and liquid injection device as described above, wherein a through hole is opened on the shell, the battery exhaust and liquid injection device is arranged in the through hole and connected to the shell, and the battery exhaust and liquid injection device is connected to the housing cavity of the shell through the atomization hole 12.

[0050] The battery provided by the present invention is provided with a battery exhaust and liquid injection device on the shell, and can be used to inject liquid or exhaust gas. Compared with the prior art, a through hole is opened on the shell for injection or exhaust, and then sealed. After the battery provided by the present invention opens a through hole on the shell, the battery exhaust and liquid injection device is connected to the through hole position of the shell. The battery exhaust and liquid injection device can not only seal the through hole of the shell, saving the time of subsequent sealing operation of the shell, but also can perform exhaust or liquid injection operations, greatly improving work efficiency.

[0051] Furthermore, the battery exhaust and liquid injection device is always connected to the battery, and can be used not only to exhaust or inject liquid during the production and testing process of the battery, but also to exhaust or inject liquid during the subsequent use of the battery. Because the exhaust or injection operation of the battery exhaust and liquid injection device only needs to be controlled by the first control valve 2 and the second control valve 4, the entire operation process is simple, convenient, and repeatable.

[0052] Therefore, the battery provided with the battery exhaust and liquid injection device can make the exhaust or liquid injection operation simpler and more convenient, thereby improving work efficiency and production efficiency.

[0053] The present invention also provides a soft-pack battery manufacturing process, comprising: evenly coating the raw materials on the rib plate, and then rolling them to form pole pieces; assembling the prepared pole pieces with the shell, and then drying the pole pieces; injecting electrolyte into the shell, and then sealing the shell to form a soft-pack battery; pre-charging the soft-pack battery, and at the same time venting the soft-pack battery through the battery venting and liquid injection device as described above, and then dividing the capacity.

[0054] In the conventional soft-pack battery manufacturing process, the soft-pack battery is pre-charged and tested after the first packaging. Because the pre-charge test requires the soft-pack battery to react and discharge, and the electrolyte and the plate need to react chemically during the reaction and discharge of the soft-pack battery, the electrolyte will be consumed in the soft-pack battery to produce gas after pre-charging. In the prior art, the soft-pack battery needs to be vented after pre-charging. Depending on the actual consumption of the electrolyte, it may also be necessary to replenish the electrolyte.

[0055] In the prior art, when the soft-pack battery is vented, it is necessary to vent through the holes on the soft-pack battery. However, the soft-pack battery needs to be kept sealed during use to prevent leakage and the like. Therefore, after the soft-pack battery is vented, it is necessary to perform a secondary packaging operation on the soft-pack battery, which greatly reduces the work efficiency and prolongs the working time.

[0056] In the present invention, the battery exhaust and liquid injection device as described above is provided on the shell of the soft-pack battery. The battery exhaust and liquid injection device connects the liquid storage chamber of the soft-pack battery with the outside world and is controlled by the first control valve 2 and the second control valve 4. During the pre-charging process of the soft-pack battery, the battery exhaust and liquid injection device can be used for exhaust. In this way, the exhaust steps after the pre-charging of the soft-pack battery can be reduced, which saves time and shortens the process steps. At the same time, because the soft-pack battery is exhausted by the battery exhaust and liquid injection device, and the battery exhaust and liquid injection device is controlled to open and close by the first control valve 2 and the second control valve 4, there is no need to perform a secondary packaging step after the pre-charging of the soft-pack battery, which further optimizes the process flow and improves work efficiency.

[0057] The present invention also provides a square shell battery manufacturing process, comprising: evenly coating the raw materials on the rib plate, and then rolling them into pole pieces; assembling the pole pieces with the shell, and then drying the pole pieces; injecting electrolyte into the shell to form a square shell battery; pre-charging and exhausting the square shell battery; replenishing the electrolyte to the square shell battery through the battery exhaust and liquid injection device as described above, and then dividing the capacity.

[0058] In the conventional square shell battery manufacturing process, after the square shell battery is pre-charged and vented, it is also necessary to perform a refilling operation on the square shell battery. Because the pre-charge test requires the square shell battery to react and discharge, and the electrolyte and the plate need to react chemically during the reaction and discharge of the square shell battery, the electrolyte will be consumed in the square shell battery after pre-charging to produce gas. In the prior art, after pre-charging, it is necessary to perform a venting operation on the square shell battery. According to the actual consumption of the electrolyte, the electrolyte is replenished. After completing the venting and refilling operations, the sealing nails are welded to the square shell battery to ensure the sealing of the square shell battery.

[0059] Because in the prior art, it is necessary to leave openings such as holes on the square shell battery to perform the exhaust and liquid replenishment operations, so after completing the exhaust and liquid replenishment operations, it is necessary to perform a step of welding sealing nails to ensure the sealing of the square shell battery during use.

[0060] In the present invention, the battery exhaust and liquid injection device as described above is provided on the shell of the square shell battery. The battery exhaust and liquid injection device connects the liquid storage chamber of the square shell battery with the outside world and is controlled by the first control valve 2 and the second control valve 4. Therefore, after the square shell battery completes the exhaust and liquid injection operations, the square shell battery can be sealed by the first control valve 2 and the second control valve 4, without the need to perform a step of welding the sealing nails, which saves time and shortens the process steps.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery exhaust and liquid injection device, characterized in that: include: A liquid injector (1), the liquid injector (1) being provided with an inner cavity (11), an atomization hole (12) and an inlet (13), the atomization hole (12) being in communication with the inner cavity (11), and the inlet (13) being in communication with the inner cavity (11); A first control valve (2), the first control valve (2) being arranged in the inner cavity (11), the first control valve (2) being connected between the atomization hole (12) and the inlet (13), and being used for opening or disconnecting the connection between the atomization hole (12) and the inlet (13).

2. The battery exhaust and liquid injection device according to claim 1, characterized in that: The injector (1) is provided with a plurality of atomization holes (12), and the atomization holes (12) are arranged along the outer ring of the injector (1).

3. The battery exhaust and liquid injection device according to claim 1, characterized in that: The battery exhaust and liquid injection device further comprises a connecting pipe (3) for connecting to an external device, wherein the connecting pipe (3) is connected to the liquid injector (1), and the connecting pipe (3) is in communication with the inlet (13).

4. The battery exhaust and liquid injection device according to claim 1, characterized in that: The battery exhaust liquid injection device further includes an injection molding ring arranged on the side of the injection molding device (1) close to the inlet (13).

5. The battery exhaust and liquid injection device according to claim 1, characterized in that: The first control valve (2) comprises a valve body (21) and a driving member (22); the valve body (21) closes the inlet (13) and is engaged and connected with the liquid injector (1); one end of the driving member (22) is connected to the liquid injector (1), and the other end of the driving member (22) is connected to the valve body (21).

6. The battery exhaust liquid injection device according to claim 5, characterized in that The driving member (22) is a compression spring.

7. The battery exhaust and liquid injection device according to claim 3, characterized in that: The battery exhaust liquid injection device further includes a second control valve (4) arranged in the connecting pipe (3).

8. A battery, characterized in that: It comprises a shell and a battery exhaust and liquid injection device as claimed in any one of claims 1 to 7, wherein the shell is provided with a through hole, the battery exhaust and liquid injection device is arranged in the through hole and connected to the shell, and the battery exhaust and liquid injection device is connected to the housing cavity of the shell through an atomization hole (12).

9. A soft pack battery process, characterized in that: include: The raw materials are evenly coated on the rib plate, and then rolled to make the electrode sheet; The produced pole sheet is assembled with the housing, and then the pole sheet is dried; Inject electrolyte into the case, and then seal the case to form a soft-packed battery; The soft-pack battery is precharged, and the soft-pack battery is exhausted by the battery exhaust liquid injection device as claimed in any one of claims 1 to 7, and then the capacity is further divided.

10. A square shell battery process, characterized in that: include: The raw materials are evenly coated on the rib plate, and then rolled to make the electrode sheet; The produced pole sheet is assembled with the housing, and then the pole sheet is dried; Inject electrolyte into the shell to form a square shell battery; Pre-charge and exhaust the square shell battery; The battery discharge liquid injection device according to any one of claims 1 to 7 is replenished with the electrolyte solution and then divided into volume.

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