Battery liquid injection device

Abstract

The utility model provides a battery liquid injection device which comprises a liquid storage container for containing liquid to be injected and a plurality of piston parts, the liquid storage container is provided with a first cavity, a plurality of second cavities communicating with the bottom end of the first cavity and infusion channels communicating the second cavities with the outside. When the piston part is close to the infusion channel in the second cavity, pressure feeding of liquid in the second cavity to the infusion channel is formed; when the piston part is separated from the second chamber and enters the first chamber, the liquid in the first chamber is filled into the second chamber. According to the battery liquid injection device disclosed by the utility model, the first cavity and the second cavity are arranged, and liquid supply from the first cavity to the second cavity and liquid injection operation from the second cavity to the outside are realized by virtue of the movement of the piston part, so that the arrangement quantity of required liquid path pipelines is reduced, the manufacturing cost is reduced, meanwhile, the overall structure is also simplified, and the production efficiency is improved. And the battery liquid injection device is more convenient to install and arrange.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery liquid injection device. Background Art

[0002] The electrolyte of a battery is the carrier of ion transmission in the battery. The electrolyte plays a role in conducting ions between the positive and negative electrodes of the battery, causing a potential difference between the two electrodes of the battery, thereby generating an electric current. Without the electrolyte, the battery cannot complete the transfer of charge and the generation of current. The electrolyte is one of the bases for ensuring the normal operation of the battery.

[0003] In the prior art, the common method for injecting electrolyte into a battery is to use a double-headed high-precision liquid injection pump for injection. Two cup bodies of the double-headed high-precision liquid injection pump are configured with one liquid injection pump. After the vacuum operation, the electrolyte is pumped into the cup body through the liquid injection pump, and then gas is pressed into the cup body to pressurize the electrolyte and inject it into the battery. This injection method is prone to fluctuations in the amount of gas pressed in, resulting in unstable electrolyte injection. Moreover, the number of cup bodies of one liquid injection machine is at least more than one hundred, and at most two or three hundred, and the number of required liquid injection pumps is astonishing, with high costs.

[0004] In the related literature, a new battery liquid injection device is proposed. After the liquid injection pipeline is led out from the liquid injection pump, it is respectively connected to each cup body, and a plunger is arranged in the cup body, and the electrolyte injection is realized by pushing the piston through the cylinder. Although this battery liquid injection device improves the injection stability of the electrolyte and reduces the usage amount of the liquid injection pump, there are also problems of a large amount of pipeline layout required and a complex layout method. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose a battery liquid injection device to reduce the required amount of pipeline layout.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] A battery liquid injection device includes:

[0008] A liquid storage container for containing the liquid to be injected and a plurality of piston parts;

[0009] The liquid storage container has a first chamber, a plurality of second chambers communicated with the bottom end of the first chamber, and an infusion channel for communicating the second chamber with the outside;

[0010] When the piston part approaches the infusion channel in the second chamber, it constitutes the pressing of the liquid in the second chamber towards the infusion channel; when the piston part enters the first chamber due to leaving the second chamber, it constitutes the pouring of the liquid in the first chamber into the second chamber.

[0011] Furthermore, the battery liquid injection device further includes a mounting portion, and each of the piston portions is fixedly connected to the mounting portion to enable synchronous movement between the piston portions.

[0012] Furthermore, the battery liquid injection device further includes a mounting base portion for carrying the liquid storage container, and a driving portion mounted on the mounting base portion; the driving portion can drive the mounting portion to move so as to enable the piston portion to move in the liquid storage container.

[0013] Furthermore, the driving portion is telescopically connected between the mounting portion and the mounting base portion, and the telescopic direction is the same as the sliding direction of the piston portion in the second chamber.

[0014] Furthermore, the driving portion is provided as an electric cylinder, the piston rod end of the electric cylinder is connected to the mounting portion, and the cylinder body end is connected to the mounting base portion.

[0015] Furthermore, a guiding portion is provided between the mounting portion and the mounting base portion to define the movable direction of the mounting portion relative to the mounting base portion.

[0016] Furthermore, the guiding portion includes a guiding rod, and the guiding rod is slidably connected to the mounting base portion and fixedly connected to the mounting portion.

[0017] Furthermore, the top of the piston portion penetrates upward through the liquid storage container and is connected to the mounting portion.

[0018] Furthermore, the liquid storage container is provided as a sealed container, having a liquid inlet pipeline, and an air extraction pipeline and an air inlet pipeline capable of adjusting the air pressure in the liquid storage container.

[0019] Furthermore, a drainage groove is formed by partial depression at the top of the chamber wall of the second chamber, and the drainage groove communicates with the first chamber.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] The battery liquid injection device of the present utility model realizes the discharge of the liquid in the second chamber through the infusion channel by setting the first chamber and the second chamber and relying on the movement of the piston portion in the second chamber to complete the liquid injection operation; after the piston portion moves out of the second chamber and enters the first chamber, the second chamber communicates with the first chamber, and the liquid in the first chamber can automatically pour into the second chamber, and then the next liquid injection can be carried out; the first chamber stores the liquid and supplies the liquid to the second chamber, reducing the layout amount of the required liquid path pipelines, reducing the manufacturing cost, and at the same time, also simplifying the overall structure, making the installation and layout of the battery liquid injection device more convenient.

[0022] By connecting the piston part and the installation part, the synchronous movement of each piston part can be achieved, enabling all piston parts to simultaneously perform liquid pumping or move away from the second chamber, which can improve the liquid injection efficiency and reduce the operation difficulty.

[0023] Setting the liquid storage container on the installation base part can maintain the position of the outlet of its infusion channel, facilitating liquid injection. Through the driving of the installation part by the driving part, the common action of all piston parts can be achieved.

[0024] The driving part is set to be telescopic, and the installation part can be pushed or pulled by the telescopic movement of the driving part, thereby realizing the pumping of liquid by the piston part or separating from the second chamber.

[0025] The piston rod of the electric cylinder has high movement precision, and the distance of each control of the piston part movement is relatively accurate. Therefore, the amount of liquid infused each time is more stable.

[0026] The guiding part can play an auxiliary guiding role in the movement of the installation part, making the movement of the piston part smoother.

[0027] The guiding rod is fixedly connected to the installation part and slidably connected to the installation base part, which can limit the installation part to move only in a fixed direction and can absorb the force of the installation part in the non-moving direction at the same time.

[0028] The top of the piston part penetrates upward through the liquid storage container, and the installation part can be arranged outside the liquid storage container, facilitating the operation and maintenance of the installation part.

[0029] Setting the liquid storage container as a sealed container and providing a liquid inlet pipeline, an air extraction pipeline and an air inlet pipeline can realize the vacuum pumping of the liquid storage container and the liquid replenishment in the liquid storage container.

[0030] The drainage groove connects the first chamber and the second chamber, forming a passage. When the bottom end of the piston part moves to the area of the drainage groove, the first chamber and the second chamber are connected, and the liquid in the first chamber will automatically flow into the second chamber through the drainage groove. Description of the Drawings

[0031] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0032] Figure 1 is a schematic diagram of the overall structure of the battery liquid injection device according to the embodiment of the present utility model;

[0033] Figure 2 is a partial cross-sectional view of the battery liquid injection device according to the embodiment of the present utility model;

[0034] Figure 3 isFigure 2 Partial enlarged view of part A

[0035] Figure 4 is Figure 2 Cross-sectional view in the direction of B-B

[0036] Explanation of reference numerals

[0037] 1. Liquid storage container

[0038] 1a. First chamber; 1b. Second chamber; 1c. Infusion channel; 1d. Drainage groove; 101. Liquid inlet pipeline; 1011. Liquid inlet valve; 102. Air extraction pipeline; 1021. Air extraction valve; 103. Air inlet pipeline; 1031. Air inlet valve

[0039] 2. Piston part

[0040] 201. Plug head; 202. Extension rod; 203. Sealing ring

[0041] 3. Installation part

[0042] 4. Installation base part

[0043] 5. Electric cylinder

[0044] 501. Piston rod end; 502. Cylinder body end

[0045] 6. Guide part

[0046] 601. Guide rod

[0047] 7. Liquid injection nozzle

[0048] 701. Liquid injection valve Detailed implementation manners

[0049] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other

[0050] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance

[0051] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0052] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0053] This embodiment relates to a battery liquid injection device to reduce the layout of pipelines required for the battery liquid injection process and reduce the usage of pipes and related accessories.

[0054] In terms of the overall structure, in combination with Figures 1 to 4 as shown, a battery liquid injection device of this embodiment includes a liquid storage container 1 for containing the liquid to be injected and a plurality of piston parts 2.

[0055] The liquid storage container 1 has a first chamber 1a, a plurality of second chambers 1b communicating with the bottom end of the first chamber 1a, and an infusion channel 1c communicating the second chambers 1b with the outside.

[0056] When the piston part 2 approaches the infusion channel 1c within the second chamber 1b, it constitutes the pressure feeding of the liquid in the second chamber 1b to the infusion channel 1c. When the piston part 2 enters the first chamber 1a after detaching from the second chamber 1b, it constitutes the pouring of the liquid in the first chamber 1a into the second chamber 1b.

[0057] With the above settings, the battery liquid injection device described in this embodiment realizes the discharge of the liquid in the second chamber 1b through the infusion channel 1c by setting the first chamber 1a and the second chamber 1b and relying on the movement of the piston part 2 within the second chamber 1b to complete the liquid injection operation. After the piston part 2 moves away from the second chamber 1b and enters the first chamber 1a, the second chamber 1b communicates with the first chamber 1a, and the liquid in the first chamber 1a can automatically pour into the second chamber 1b, and the next liquid injection can be carried out. The liquid supply from the first chamber 1a to the second chamber reduces the layout amount of the required liquid path pipelines, reduces the manufacturing cost, and at the same time, simplifies the overall structure and makes the installation and layout of the battery liquid injection device more convenient.

[0058] Based on the above overall introduction, specifically speaking, still referring to Figure 1 and Figure 2As shown in the figure, the liquid storage container 1 can adopt a cuboid box body, and a liquid injection cup body is hermetically connected to the bottom of the box body, so that the box body and the cup body together form the liquid storage container 1. The inside of the box body is the first chamber 1a, the inside of the liquid injection cup body is the second chamber 1b, and the infusion channel 1c is arranged at the bottom of the liquid injection cup body. The battery liquid injection device of this embodiment adopts the method of injecting liquid downward into the battery, is provided with ten cup bodies, and the ten cup bodies are arranged in two rows and five columns, and can inject liquid into ten batteries at the same time, with high efficiency.

[0059] It should be noted that the number of liquid injection cup bodies can be selected according to production needs, and factors such as the scale of the battery production line and the site conditions should be comprehensively considered for reasonable setting. The battery liquid injection device of this embodiment can be used for the electrolyte perfusion process of various batteries, and at the same time, it can also be used in other working scenarios that require batch liquid injection into small containers.

[0060] For the convenience of liquid injection operation, a liquid injection nozzle 7 is also provided at the bottom end of the liquid storage container 1. The liquid injection nozzle 7 communicates with the infusion channel 1c and can be detachably and hermetically connected to the battery. A liquid injection valve 701 is also provided between the liquid injection nozzle 7 and the liquid storage container 1, which can control the flow and disconnection of the infused liquid. The liquid injection nozzle 7 can adopt

[0061] Based on the demand for high-efficiency production, the battery liquid injection device further includes an installation part 3, and each piston part 2 is fixedly connected to the installation part 3 to enable synchronous movement between the piston parts 2. In this embodiment, all the piston parts 2 are fixedly connected to the installation part 3, which can make all the piston parts 2 simultaneously perform liquid pumping or move away from the second chamber 1b, improving the liquid injection efficiency, reducing the operation difficulty, and realizing synchronous liquid injection for ten batteries. Specifically, the installation part 3 adopts a rectangular plate, and each piston part 2 is connected to the installation part 3 separately by means of bolts, which is convenient for installation and replacement, and the connection strength is stable.

[0062] For the convenience of arranging the battery liquid injection device in a specific working site, the battery liquid injection device further includes an installation base part 4 for carrying the liquid storage container 1, and a driving part installed on the installation base part 4. The driving part can drive the installation part 3 to move, so as to constitute the movement of the piston part 2 in the liquid storage container 1. Setting the liquid storage container 1 on the installation base part 4 can maintain the position of the outlet of its infusion channel 1c, and thus can fix the position and angle of the liquid injection nozzle 7, which is convenient for liquid injection. By driving and controlling the installation part 3 by the driving part, the common action of all the piston parts 2 can be realized.

[0063] Regarding the structure of the installation base part 4, specifically, it can adopt a frame structure welded by profiles and plates. The installation base part 4 is provided with support legs to support on the site, and is internally provided with two layers, the lower layer installs the liquid storage container 1 and makes the liquid injection nozzles 7 uniformly face downward, and the upper layer is used to install the driving part, and the various parts are arranged three-dimensionally, saving the occupied space.

[0064] The driving part is telescopically connected between the mounting part 3 and the mounting base part 4, and the telescopic direction is the same as the sliding direction of the piston part 2 in the second chamber 1b. Setting the driving part to a telescopic form can push or pull the mounting part 3 by the telescoping of the driving part, thereby realizing the liquid pumping of the piston part 2 or the separation of the piston part 2 from the second chamber 1b. It should be noted that the driving part can also adopt other structural forms, such as a screw slider structure, a guide rail slider structure, etc., as long as it can realize the liftable movement of the mounting part 3.

[0065] In order to enable the driving part to have better moving accuracy for the mounting part 3, further, the driving part is set as an electric cylinder 5. The piston rod end 501 of the electric cylinder 5 is connected to the mounting part 3, and the cylinder body end 502 is connected to the mounting base part 4. The piston rod of the electric cylinder 5 has high moving accuracy. Through servo control, the distance of each movement of the piston part 2 is relatively accurate. Therefore, the amount of liquid infused by the liquid injection nozzle 7 each time is more stable. Secondly, using the electric cylinder 5 as the driving part also has a high infusion speed and high working efficiency. Of course, it is also possible to use a telescopic structure such as a pneumatic cylinder or a hydraulic cylinder for the driving part, but the controllable accuracy of these telescopic structures is not as good as that of the electric cylinder 5. Also, because the stroke of the pneumatic cylinder, hydraulic cylinder, etc. is fixed and it is difficult to adapt to batteries with different electrolyte usage amounts.

[0066] As an auxiliary guide for the movement of the mounting part 3, a guiding part 6 is provided between the mounting part 3 and the mounting base part 4 to limit the movable direction of the mounting part 3 relative to the mounting base part 4, making the movement of the piston part 2 smoother and reducing jamming situations.

[0067] Specifically, the guiding part 6 includes a guiding rod 601. The guiding rod 601 is slidably connected to the mounting base part 4 and fixedly connected to the mounting part 3. A connecting head is installed at the bottom end of the guiding rod 601. The connecting head is attached to the upper surface of the mounting part 3 and bolted. A small section of flange pipe is bolted to the top end of the mounting base part 4. The top end of the guiding rod 601 passes through the flange pipe and extends upward, which can play an auxiliary guiding role for the guiding rod 601. In this embodiment, a set of guiding rods 601 is provided at each of the four corners of the mounting base part 4, which can absorb the force of the mounting part 3 in the non-moving direction and make the mounting part 3 move more smoothly during the liftable movement.

[0068] For the convenience of connecting the mounting part 3 and the driving part, refer to Figure 2 and Figure 3As shown, the top of the piston part 2 passes through the liquid storage container 1 upward and is connected to the mounting part 3. Specifically, the piston part 2 includes a plug 201 and an extension rod 202. The plug 201 is adapted to the shape of the second chamber 1b and can slide in the second chamber 1b. The second chamber 1b is cylindrical, and the plug 201 is matched to be in the shape of a round cake, and a sealing ring 203 is embedded on the circumferential side wall of the plug 201, which can achieve the sealing of the plug 201 with the cavity wall in the second chamber 1b. The extension rod 202 is connected to the top of the plug 201, and passes through the top of the liquid storage container 1 upward, and is bolted to the mounting part 3. The mounting part 3 is arranged outside the liquid storage container 1, which can facilitate the connection operation between the extension rod 202 and the mounting part 3, and the driving part and the mounting part 3, and can also facilitate the maintenance of parts during daily use.

[0069] In order to facilitate the vacuuming operation during battery filling, the liquid storage container 1 is configured as a sealed container, having a liquid inlet pipeline 101, and an air extraction pipeline 102 and an air intake pipeline 103 capable of adjusting the air pressure in the liquid storage container 1. The liquid inlet pipeline 101 is arranged at the top of the side wall of the liquid storage container 1, and is used to add liquid to the liquid storage container 1, and is specifically provided with a liquid inlet valve 1011 to control the on-off of the liquid inlet pipeline 101. The air extraction pipeline 102 is arranged at the top of the side wall of the liquid storage container 1, and is used to connect a negative pressure device to vacuum the liquid storage container 1 and the connected battery, and an air extraction valve 1021 is provided on the air extraction pipeline 102. The air intake pipeline 103 is arranged at the top of the side wall of the liquid storage container 1, and is used to introduce air into the liquid storage container 1 after the liquid injection action of the piston part 2 is completed, and an air intake valve 1031 is provided on the air intake pipeline 103.

[0070] The injection valve 701, the liquid inlet valve 1011, the air extraction valve 1021 and the air intake valve 1031 in this embodiment can all be in the form of two-way valves and are set to be electromagnetically opened and closed, so that each valve can be individually controlled by the control system, which is beneficial to improving the degree of production automation.

[0071] In order to make the liquid flow from the first chamber 1a to the second chamber 1b more smoothly, refer to Figure 3 and Figure 4, the top part of the cavity wall of the second chamber 1b is recessed to form a drainage groove 1d, and the drainage groove 1d is connected to the first chamber 1a. Specifically, the longitudinal section of the drainage groove 1d is a right-angled trapezoid, and the bottom is an inclined surface inclined toward the second chamber 1b, so as to facilitate the inflow of liquid and reduce dead angles. Four drainage grooves 1d are evenly distributed in the circumference of the top side wall of each second chamber 1b, and have a good liquid inlet rate. When the sealing ring 203 on the plug 201 is located above the bottom end of the drainage groove 1d, the drainage groove 1d can form a passage connecting the first chamber 1a and the second chamber 1b, and the plug 201 does not need to be completely separated from the second chamber 1b to realize the injection of liquid into the second chamber 1b. When the sealing ring 203 on the plug 201 is located below the bottom end of the drainage groove 1d, the second chamber 1b is closed by the plug 201. When the plug 201 continues to move downward, it will squeeze the liquid in the second chamber 1b, so that the liquid is discharged from the infusion channel 1c and enters the battery.

[0072] The steps of the battery liquid injection device of this embodiment for injecting liquid into the battery are as follows:

[0073] Connect the battery to be filled with liquid to the filling nozzle 7, open the filling valve 701, open the exhaust valve 1021, close the liquid inlet valve 1011, close the air inlet valve 1031, evacuate the battery and the liquid storage container 1 until the required vacuum degree is reached, and then close the filling valve 701 and the exhaust valve 1021.

[0074] Open the liquid inlet valve 1011 and inject the electrolyte into the liquid storage container 1. Then the electrolyte enters the second chamber 1b from the first chamber 1a through the drainage groove 1d. After the second chamber 1b is filled, close the liquid inlet valve 1011, open the injection valve 701, start the driving part to move the piston part 2 downward, and press the electrolyte in the second chamber 1b into the battery from the injection nozzle 7. After the injection is completed, remove the battery.

[0075] Open the air inlet valve 1031 to balance the air pressure inside the liquid storage container 1 with the outside, close the liquid injection valve 701, start the driving part to move the piston part 2 upward and reset, and close the air inlet valve 1031.

[0076] The battery liquid filling device described in this embodiment is provided with a first chamber 1a and a second chamber 1b, and the driving part drives the piston part 2 to move in the liquid storage container 1, so as to realize the pouring of the liquid in the first chamber 1a into the liquid in the second chamber 1b, and the liquid in the second chamber 1b is pushed out. Compared with the prior art, the provision of the first chamber 1a replaces a large number of liquid pipelines, reduces the amount of liquid pipelines required for the battery liquid filling device of this embodiment, and reduces the manufacturing cost. At the same time, it also simplifies the overall structure, making the installation and arrangement of the battery liquid filling device more convenient.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery filling device, characterized in that: include: A liquid storage container for containing the liquid to be injected and a plurality of piston parts; The liquid storage container comprises a first chamber, a plurality of second chambers connected to the bottom end of the first chamber, and an infusion channel connecting the second chambers with the outside; When the piston part approaches the infusion channel in the second chamber, the liquid in the second chamber is pressed into the infusion channel; when the piston part enters the first chamber due to separation from the second chamber, the liquid in the first chamber is poured into the second chamber.

2. The battery liquid injection device according to claim 1, characterized in that: The battery liquid injection device also includes a mounting portion, and each of the piston portions is fixedly connected to the mounting portion to enable the piston portions to move synchronously.

3. The battery liquid injection device according to claim 2, characterized in that: The battery liquid injection device also includes a mounting base portion that supports the liquid storage container, and a driving portion mounted on the mounting base portion; the driving portion can drive the mounting portion to move, so as to cause the piston portion to move in the liquid storage container.

4. The battery liquid injection device according to claim 3, characterized in that: The driving part is telescopically connected between the mounting part and the mounting base part, and the telescopic direction is the same as the sliding direction of the piston part in the second chamber.

5. The battery liquid injection device according to claim 4, characterized in that: The driving part is configured as an electric cylinder, a piston rod end of the electric cylinder is connected to the mounting part, and a cylinder body end of the electric cylinder is connected to the mounting base.

6. The battery liquid injection device according to claim 3, characterized in that: A guide portion is provided between the mounting portion and the mounting base portion to limit a movable direction of the mounting portion relative to the mounting base portion.

7. The battery liquid injection device according to claim 6, characterized in that: The guide portion comprises a guide rod, and the guide rod is slidably connected to the installation base portion and fixedly connected to the installation portion.

8. The battery liquid injection device according to claim 2, characterized in that: The top of the piston part passes through the liquid storage container upward and is connected to the mounting part.

9. The battery liquid injection device according to claim 1, characterized in that: The liquid storage container is configured as a sealed container, and is provided with a liquid inlet pipeline, and an air extraction pipeline and an air inlet pipeline capable of adjusting the air pressure in the liquid storage container.

10. The battery liquid injection device according to any one of claims 1 to 9, characterized in that: The top portion of the cavity wall of the second cavity is recessed to form a drainage groove, and the drainage groove is connected to the first cavity.

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