Battery liquid supplementing device and formation equipment

Abstract

The utility model relates to a battery liquid supplementing device and formation equipment, and belongs to the technical field of battery preparation, the battery liquid supplementing device comprises a liquid injection mechanism, the liquid injection mechanism comprises a negative pressure pipe and a flexible sealing cover communicated with a pipe opening of the negative pressure pipe, and a liquid injection needle extending into the flexible sealing cover is fixedly connected in the negative pressure pipe. The liquid injection mechanism comprises the negative pressure pipe and the flexible sealing cover communicated with the pipe opening of the negative pressure pipe, and the liquid injection needle extending into the flexible sealing cover is fixedly connected into the negative pressure pipe. Therefore, the negative pressure pipe is matched with the flexible sealing cover to seal the liquid injection hole of the butt joint battery, and negative pressure pumping formation of the battery can be realized. Furthermore, the liquid injection needle can be pushed into the battery liquid injection hole for liquid supplementation by utilizing the function that the flexible sealing cover can elastically stretch and deform, liquid injection in formation is realized, and the battery does not need to be manually taken down for liquid supplementation, so that the production time of the battery is greatly shortened, the production cost is reduced, the battery can be conveniently applied to mass production, and the capacity of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a battery electrolyte replenishment device and formation equipment. Background Technology

[0002] Formation is a crucial step in battery manufacturing. The formation process removes gases generated inside the battery and ensures the integrity of the electrode interfaces. Current formation equipment only has the functions of creating negative pressure and heating, which is relatively limited for lithium-ion batteries.

[0003] Conventional batteries are typically formed at half capacity, requiring less electrolyte during the formation stage. However, lithium-ion batteries are usually formed at full capacity, which requires a large amount of electrolyte. Insufficient electrolyte can lead to black spots and lithium plating. Therefore, lithium-ion batteries require manual removal of the battery during the formation process to add electrolyte, which is a cumbersome process and affects battery production capacity.

[0004] In view of this, it is necessary to provide a battery electrolyte replenishment device and formation equipment to realize automatic electrolyte replenishment of batteries during the battery formation process, avoid the manual removal of batteries for electrolyte replenishment, and achieve the purpose of reducing production costs and increasing battery production capacity. Summary of the Invention

[0005] To address the shortcomings or deficiencies mentioned in the background technology above, this application provides a battery electrolyte replenishment device and formation equipment, which can replenish the battery during the battery formation process, avoiding the need for manual removal of the battery for electrolyte replenishment, thereby reducing production costs and increasing battery production capacity.

[0006] In a first aspect, embodiments of this application provide a battery electrolyte replenishment device, comprising:

[0007] The injection mechanism includes a negative pressure tube and a flexible sealing cover connected to the opening of the negative pressure tube. An injection needle extending into the flexible sealing cover is fixedly connected inside the negative pressure tube.

[0008] In one aspect, in some embodiments, the battery replenishment device further includes a battery holder with a placement slot for placing the battery.

[0009] In one aspect, in some embodiments, the battery replenishment device further includes a pushing mechanism for pushing the battery in the placement slot upward.

[0010] In one aspect, in some embodiments, the bottom of the battery holder is provided with a clearance hole communicating with the placement slot, and the pushing mechanism includes a vertical push rod for extending into the clearance hole to push the battery.

[0011] In one aspect, in some embodiments, the top of the vertical push rod is provided with a weighing sensor for weighing the battery.

[0012] In some embodiments, the injection needle is connected to an electrolyte storage tank via a pipeline, and a first valve for switching the pipeline on and off is provided on the pipeline; a second valve for switching the negative pressure pipe on and off is provided on the negative pressure pipe.

[0013] In some embodiments, the negative pressure tube is a rigid straight tube, and the inside of the negative pressure tube is provided with a fixing plate that is fixedly connected to the injection needle, and the fixing plate is provided with a vent hole.

[0014] In one aspect, in some embodiments, the diameter of the flexible sealing cover gradually increases in the direction away from the negative pressure pipe.

[0015] In some embodiments, the flexible sealing cover is made of natural rubber or silicone rubber.

[0016] Secondly, embodiments of this application provide a formation apparatus, including:

[0017] The battery electrolyte replenishment device described in any of the above claims.

[0018] The beneficial effects of the technical solution provided in this application include:

[0019] This application provides a battery electrolyte replenishment device and formation equipment. The electrolyte injection mechanism includes a negative pressure tube and a flexible sealing cover connected to the opening of the negative pressure tube. An injection needle extending into the flexible sealing cover is fixedly connected inside the negative pressure tube. Therefore, the negative pressure tube, in conjunction with the flexible sealing cover, seals the electrolyte injection hole of the battery, enabling negative pressure formation of the battery. Furthermore, utilizing the elastic expansion and contraction function of the flexible sealing cover, the injection needle can be pushed into the battery's electrolyte injection hole for electrolyte replenishment, achieving electrolyte injection during formation without the need for manual removal of the battery. This significantly reduces battery production time and costs, facilitating mass production and increasing battery capacity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the battery replenishment device provided in the embodiments of this application;

[0022] Figure 2This is a schematic diagram of the liquid injection mechanism provided in an embodiment of this application.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 10. Injection mechanism; 11. Negative pressure pipe; 12. Flexible sealing cover; 13. Injection needle; 14. Pipeline; 15. Electrolyte storage tank; 16. First valve; 17. Second valve; 18. Fixing plate; 19. Vent hole; 20. Battery holder; 21. Placement slot; 22. Clearance hole; 30. Pushing mechanism; 31. Vertical push rod; 32. Weighing sensor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] To address the shortcomings or deficiencies mentioned in the background technology above, this application provides a battery electrolyte replenishment device and formation equipment, which can replenish the battery during the battery formation process, avoiding the need for manual removal of the battery for electrolyte replenishment, thereby reducing production costs and increasing battery production capacity.

[0027] See Figure 1 and Figure 2 As shown, the first aspect of this application provides a battery electrolyte replenishment device, comprising:

[0028] The injection mechanism includes a negative pressure tube 11 and a flexible sealing cover 12 connected to the opening of the negative pressure tube 11. An injection needle 13 extending into the flexible sealing cover 12 is fixedly connected inside the negative pressure tube 11.

[0029] The battery electrolyte replenishment device of this application embodiment has a liquid injection mechanism with a negative pressure pipe 11 and a flexible sealing cover 12 fixedly connected to the pipe opening. The negative pressure pipe 11 is used to connect to an external negative pressure device to draw negative pressure. The flexible sealing cover 12 is used to seal the liquid injection hole of the battery, so that the battery can be formed by drawing negative pressure.

[0030] Furthermore, an injection needle 13 is fixedly connected inside the negative pressure tube 11 and extends into the flexible sealing cover 12. When the battery needs to be replenished with electrolyte during the formation process, the negative pressure tube 11 is pressed down to squeeze the flexible sealing cover 12. By utilizing the elastic expansion and contraction function of the flexible sealing cover 12, the injection needle 13 can be pushed into the battery's injection hole for electrolyte replenishment.

[0031] After the electrolyte replenishment is completed, the negative pressure tube 11 is reset so that the injection needle 13 exits the battery's injection hole. Since the battery is not disconnected from the flexible sealing cover 12 during the entire process, electrolyte replenishment is achieved during formation without the need for manual removal of the battery for replenishment. This greatly reduces battery production time and costs, making it convenient for mass production and increasing battery production capacity.

[0032] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a battery replenishing device, which further includes a battery holder 20, and the battery holder 20 is provided with a placement groove 21 for placing a battery.

[0033] The battery holder 20 in this embodiment of the application is provided with a placement groove 21, which can hold the battery. This facilitates the flexible sealing cover 12 to seal the electrolyte injection hole of the battery, preventing the battery from tipping over or shifting during the negative pressure formation process, and improving the reliability of the device.

[0034] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a battery replenishment device, which further includes a pushing mechanism 30 for pushing the battery in the placement slot 21 upward.

[0035] The pushing mechanism 30 of this application embodiment can push the battery upward, causing the battery to move upward and connect the battery injection hole to the flexible sealing cover 12. Moreover, after the battery moves upward and squeezes the flexible sealing cover 12, the injection needle 13 can be inserted into the battery injection hole for injection.

[0036] For example, the pushing mechanism 30 can be a small lifting platform or a small electric cylinder. If the size allows, the small lifting platform or small electric cylinder can be arranged within the placement slot 21 to directly move the battery upwards and change its height. In other embodiments, the pushing mechanism 30 can be arranged below the battery holder 20, indirectly moving the battery upwards by moving the battery holder 20 upwards.

[0037] It should be noted that, compared with using a lifting device to move the liquid injection mechanism down to the battery, the structure of using the pushing mechanism 30 to move the battery up to the liquid injection mechanism in this embodiment is more economical and simple, has strong feasibility, and ensures the reliability of the device.

[0038] Firstly, in some alternative embodiments: see Figure 1 and Figure 2As shown, this application embodiment provides a battery replenishment device. The bottom of the battery holder 20 of the battery replenishment device is provided with a clearance hole 22 that communicates with the placement groove 21. The pushing mechanism 30 includes a vertical push rod 31 for extending into the clearance hole 22 to push the battery.

[0039] In this embodiment, the battery holder 20 has a clearance hole 22 at its bottom, which connects to the placement groove 21. The clearance hole 22 facilitates the insertion of the vertical push rod 31 of the pushing mechanism 30 to push the battery in the placement groove 21, thereby enabling the vertical push rod 31 to directly move the battery upward and change its height. For example, the vertical push rod 31 can be an electric push rod or a hydraulic push rod, which facilitates automatic control.

[0040] It should be noted that in this embodiment, the pushing stroke of the vertical push rod 31 is much smaller than the depth of the placement groove 21. During the process of the battery being pushed, it can move upward along the groove wall of the placement groove 21, ensuring that the battery is still constrained by the placement groove 21 during the upward movement and that the battery will not tilt or shift.

[0041] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a battery replenishing device, wherein a weighing sensor 32 for weighing the battery is provided at the top of the vertical push rod 31 of the battery replenishing device.

[0042] A weighing sensor 32 is installed at the top of the vertical push rod 31 in this embodiment. The weighing sensor 32, in conjunction with the vertical push rod 31, can weigh the battery in the placement slot 21. Specifically, when it is necessary to weigh the battery, the vertical push rod 31 is controlled to push the battery, causing the battery to detach from the bottom wall of the placement slot 21, while preventing the battery from contacting the flexible sealing cover 12. The entire weight of the battery falls on the weighing sensor 32, thereby allowing the weight of the battery to be measured.

[0043] For example, after an unfilled battery is placed in the placement slot 21 of the battery holder 20, the weight of the battery can be measured using the vertical push rod 31 and the weighing sensor 32, and recorded as M1; when the battery is sealed with the flexible sealing cover 12 and the filling needle 13 is inserted into the filling hole of the battery, the data measured by the weighing sensor 32 is recorded as M2.

[0044] After the battery is replenished with electrolyte during the formation process, the data measured by the weighing sensor 32 is recorded as M3; the difference between M3 and M2 is the amount of electrolyte replenished; after the battery formation is completed, when the flexible sealing cover 12 is removed from the battery and the battery has not fallen onto the bottom wall of the placement tank 21, the data measured by the weighing sensor 32 is recorded as M4; the difference between M4 and M1 is the amount of electrolyte retained in the battery, that is, the total amount of electrolyte injected into the battery.

[0045] The battery electrolyte replenishment device described in this application allows for convenient control of both the replenishment and retention amounts, ensuring product consistency. The device is easily applicable to mass production, reducing battery production time and costs, thereby increasing battery production capacity.

[0046] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a battery replenishment device. The injection needle 13 of the battery replenishment device is connected to an electrolyte storage tank 15 through a pipeline 14. A first valve 16 for opening and closing the pipeline 14 is provided on the pipeline 14; a second valve 17 for opening and closing the negative pressure pipe 11 is provided on the negative pressure pipe 11.

[0047] In this embodiment, the injection needle 13 is connected to an electrolyte storage tank 15 via a pipe 14. Electrolyte in the storage tank 15 can be guided to the injection needle 13 through the pipe 14. A first valve 16 is installed on the pipe 14 to control its opening and closing. A second valve 17 is installed on the negative pressure pipe 11 to control its opening and closing. Both the first valve 16 and the second valve 17 can be electrically operated for easy automatic control.

[0048] For example, the operation process of an automatic fluid replenishment device is as follows:

[0049] First, place the battery into the placement slot 21 of the battery holder 20, then place the battery holder 20 below the liquid injection mechanism 10. Use the vertical push rod 31 to push the battery upwards, measure the weight of the battery, and then push the battery upwards further so that the flexible sealing cover 12 of the liquid injection mechanism aligns with the battery liquid injection hole to form a sealed connection, and the head of the liquid injection needle 13 is located above the battery liquid injection hole. At this time, use the external negative pressure device connected to the negative pressure tube 11 to draw negative pressure. When the set negative pressure value is reached in the negative pressure tube 11, the battery is formed.

[0050] When the battery needs electrolyte replenishment, the second valve 17 on the negative pressure pipe 11 is closed, and the battery is pushed upward using the vertical push rod 31. The flexible sealing cover 12 is further squeezed and deformed, so that the head of the injection needle 13 is inserted into the battery's injection hole. Then, the first valve 16 is opened, and the negative pressure in the negative pressure pipe 11 causes the electrolyte in the electrolyte storage tank 15 to flow into the battery along the pipe 14 and the injection needle 13. After replenishment is completed, the first valve 16 is closed.

[0051] Since the battery remains connected to the flexible sealing cover 12 throughout the process, electrolyte injection occurs during battery formation, significantly reducing battery production time. Furthermore, the entire process utilizes a vertical push rod 31 and a weighing sensor 32 to measure the battery's weight, thereby controlling the amount of electrolyte added.

[0052] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a battery replenishment device. The negative pressure tube 11 of the battery replenishment device is a rigid straight tube. The inside of the negative pressure tube 11 is provided with a fixing plate 18 that is fixedly connected to the injection needle 13. The fixing plate 18 is provided with a vent hole 19.

[0053] In this embodiment, the negative pressure tube 11 is a rigid straight tube, ensuring that when the battery and the negative pressure tube 11 are close to each other, the battery injection hole and the flexible sealing cover 12 can be squeezed and sealed. At the same time, the internal space of the negative pressure tube 11 facilitates the arrangement of the injection needle 13. The injection needle 13 is fixed on the fixing plate 18, which is fixed inside the negative pressure tube 11. To avoid affecting the negative pressure drawing of the negative pressure tube 11, the fixing plate 18 is provided with a vent hole 19.

[0054] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown, this application embodiment provides a battery replenishment device, wherein the diameter of the flexible sealing cover 12 of the battery replenishment device gradually increases in the direction away from the negative pressure pipe 11.

[0055] In this embodiment, the diameter of the flexible sealing cover 12 gradually increases in the direction away from the negative pressure pipe 11, making it easy for the flexible sealing cover 12 to connect with the battery injection hole. After the flexible sealing cover 12 is squeezed and deformed, the inner wall of its large end opening can be turned outward and fit against the top surface of the battery. When the negative pressure pipe 11 draws negative pressure, the external atmospheric pressure acts directly on the turned-out part of the flexible sealing cover 12, so that the turned-out part fits tightly against the top surface of the battery, further ensuring the connection and sealing effect.

[0056] For example, the flexible sealing cover 12 in this embodiment is in the shape of a conical cylinder. The flexible sealing cover 12 can be fixedly connected to the negative pressure pipe 11 by means of a clamp or by means of adhesive bonding.

[0057] Firstly, in some alternative embodiments: see Figure 1 and Figure 2 As shown, this application embodiment provides a battery replenishment device, wherein the flexible sealing cover 12 of the battery replenishment device is made of natural rubber or silicone rubber.

[0058] The flexible sealing cover 12 of this application embodiment is made of natural rubber or silicone rubber, which has good elasticity and can quickly restore its original shape. It is convenient to connect to the liquid injection hole on the top surface of the battery for sealing, ensuring the required sealing performance for negative pressure formation. It is convenient, durable, low in cost, and can achieve good performance.

[0059] See Figure 1 and Figure 2As shown, a second aspect of this application provides a formation apparatus, comprising:

[0060] The battery replenishment device according to any of the above embodiments.

[0061] The formation equipment of this application adopts the battery replenishment device of any of the above embodiments, which can replenish the battery during the battery formation process, avoid the operation of manually removing the battery for replenishment, and achieve the purpose of reducing production costs and increasing battery production capacity.

[0062] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0063] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0064] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A battery electrolyte replenishment device, characterized in that, include: The injection mechanism includes a negative pressure tube (11) and a flexible sealing cover (12) connected to the opening of the negative pressure tube (11). An injection needle (13) extending into the flexible sealing cover (12) is fixedly connected inside the negative pressure tube (11).

2. The battery electrolyte replenishment device as described in claim 1, characterized in that: The battery replenishment device also includes a battery holder (20), which has a placement slot (21) for placing batteries.

3. The battery electrolyte replenishment device as described in claim 2, characterized in that: The battery replenishment device also includes a pushing mechanism (30), which is used to push the battery in the placement slot (21) upward.

4. The battery electrolyte replenishment device as described in claim 3, characterized in that: The bottom of the battery holder (20) is provided with a clearance hole (22) that communicates with the placement slot (21), and the pushing mechanism (30) includes a vertical push rod (31) for extending into the clearance hole (22) to push the battery.

5. The battery electrolyte replenishment device as described in claim 4, characterized in that: The top of the vertical push rod (31) is provided with a weighing sensor (32) for weighing the battery.

6. The battery electrolyte replenishment device as described in claim 1, characterized in that: The injection needle (13) is connected to an electrolyte storage tank (15) via a pipeline (14). A first valve (16) for switching the pipeline (14) on and off is provided on the pipeline (14). A second valve (17) for switching the negative pressure pipe (11) on and off is provided on the negative pressure pipe (11).

7. The battery electrolyte replenishment device as described in claim 1, characterized in that: The negative pressure tube (11) is a rigid straight tube. The inside of the negative pressure tube (11) is provided with a fixing plate (18) that is fixedly connected to the injection needle (13). The fixing plate (18) is provided with a vent hole (19).

8. The battery electrolyte replenishment device as described in claim 1, characterized in that: The diameter of the flexible sealing cover (12) gradually increases in the direction away from the negative pressure pipe (11).

9. The battery electrolyte replenishment device as described in claim 1, characterized in that: The flexible sealing cover (12) is made of natural rubber or silicone rubber.

10. A chemical formation device, characterized in that, include: The battery replenishment device according to any one of claims 1 to 9.

Images