Electrolyte injection device

Abstract

The utility model discloses an electrolyte injection device, including a vacuum box and an infusion mechanism, a quantitative injection mechanism, a lifting mechanism and a carrier arranged in the vacuum box cavity; the infusion mechanism includes a plurality of injection tubes and an electric proportional flow valve arranged on the injection tubes; the quantitative injection mechanism includes a weighing cup, a solenoid valve and an injection cup connected in sequence, and the weighing cup is arranged one-to-one with the injection tube; the lifting mechanism is connected to the quantitative injection mechanism and is used to drive the quantitative injection mechanism to perform lifting and lowering movements; the carrier is provided with a plurality of placement slots, and the placement slots are arranged one-to-one with the quantitative injection mechanism. The utility model has a simple structure, low maintenance cost, convenient operation, no manual injection, high injection efficiency, high injection accuracy, high safety, and can match batteries of different specifications by replacing the carrier, and has high versatility.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production equipment, and in particular relates to an electrolyte injection device. Background Art

[0002] Electrolyte is one of the key materials of lithium batteries. It is generally composed of lithium salts and organic solvents. The positive and negative electrodes and separators of the battery are immersed in the electrolyte. During the charging and discharging process, the electrolyte acts as a transmission medium for lithium ions. On the one hand, it provides some active lithium ions to be used as conductive ions. On the other hand, it provides ion channels to help lithium ions move freely in it.

[0003] The automatic electrolyte injection equipment currently used is relatively complex, difficult to operate and costly; while manual injection requires high personnel proficiency, has low production efficiency, low injection accuracy and high risk. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide an electrolyte injection device with a simple structure, low maintenance cost, easy operation, no need for manual injection, high injection efficiency, high injection accuracy, high safety, and the ability to match batteries of different specifications by replacing the carrier, thus having high versatility.

[0005] The utility model provides the following technical solutions:

[0006] An electrolyte injection device comprises a vacuum box and an infusion mechanism, a quantitative injection mechanism, a lifting mechanism and a carrier arranged in a vacuum box cavity;

[0007] The infusion mechanism comprises a plurality of injection tubes and an electric proportional flow valve arranged on the injection tubes;

[0008] The quantitative liquid injection mechanism comprises a weighing cup, a solenoid valve and a liquid injection cup connected in sequence, and the weighing cup and the liquid injection tube are arranged in a one-to-one correspondence;

[0009] The lifting mechanism is connected to the quantitative liquid injection mechanism and is used to drive the quantitative liquid injection mechanism to perform lifting movement;

[0010] The carrier is provided with a plurality of placement slots, and the placement slots are arranged in one-to-one correspondence with the quantitative liquid injection mechanisms.

[0011] Furthermore, at least two cavities are provided in the vacuum box, each of which is provided with a group of infusion mechanisms, quantitative injection mechanisms, lifting mechanisms and carriers. The opening frames of the cavities are installed with inflatable sealing rings and are sealed by the box door opening and closing mechanism.

[0012] Furthermore, the box door opening and closing mechanism includes a vacuum door, a first linear guide rail and a lifting cylinder;

[0013] The vacuum door covers the opening of the cavity, and the first linear guide rail and the lifting cylinder are installed in parallel on the vacuum box;

[0014] The telescopic shaft of the lifting cylinder is connected to a support plate, one end of the support plate is connected to the vacuum door, and the other end is connected to a slider, and the slider is slidably assembled on the first linear guide rail.

[0015] Furthermore, the infusion mechanism also includes an infusion tube and a liquid separation row. One end of the infusion tube is provided with an infusion interface, and the other end is connected to the liquid separation row. Each interface of the liquid separation row is connected to the injection tube.

[0016] Furthermore, the quantitative injection mechanism also includes a weighing sensor, which is installed on the circumferential outer side of the injection cup. The bottom of the injection cup is connected to a liquid injection needle, and a sealing ring is provided on the circumferential end surface of the bottom of the injection cup.

[0017] Furthermore, the lifting mechanism includes a lifting motor, a screw rod, a lifting plate and a guide rod;

[0018] The lifting motor is installed on the top of the vacuum box cavity, the output shaft of the lifting motor is connected to the screw rod, the lifting plate is connected to the screw rod through a screw nut, and the quantitative injection mechanism is installed on the lifting plate;

[0019] The guide rods are provided in plurality and are vertically installed inside the vacuum box. The guide rods are installed by penetrating the lifting plate through sliding sleeves.

[0020] Furthermore, the carrier is also provided with a liquid storage area, and the placement groove is connected with the liquid storage area through a liquid guiding groove.

[0021] Furthermore, it also includes a loading mechanism, which includes a telescopic cylinder and a second linear guide rail arranged in parallel at the bottom of the vacuum box cavity, the telescopic cylinder is connected to the carrier, and the bottom of the carrier is provided with a guide rail groove matching the second linear guide rail.

[0022] Furthermore, the electric control mechanism includes an electric control operation panel arranged on the outer side of the vacuum box, and the electric control operation panel is electrically connected to the infusion mechanism, the quantitative injection mechanism and the lifting mechanism through the aviation plug assembly.

[0023] Furthermore, the vacuum box is provided with a three-way valve, which includes a first interface, a second interface and a third interface, the first interface is connected to the cavity of the vacuum box, the second interface is connected to a vacuum device, and the third interface is connected to a vacuum breaking valve.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] The utility model includes an infusion mechanism, a quantitative injection mechanism, a lifting mechanism and a carrier. The infusion mechanism transports electrolyte to a weighing cup of the quantitative injection mechanism through an injection tube, wherein an electric proportional flow valve can improve injection accuracy. During the infusion process, the lifting mechanism adjusts the height of the quantitative injection mechanism at any time. When the electrolyte in the weighing cup reaches a set mass, the solenoid valve opens, and the electrolyte is injected into the battery stored in the placement slot through the injection cup. The electrolyte injection device provided by the utility model has a simple structure, low maintenance cost, and convenient operation. It does not require manual injection, has high injection efficiency, high injection accuracy, and high safety. It is particularly suitable for use in small-batch production of batteries or in supporting production of batteries with unfixed production locations. It can match batteries of different specifications by simply replacing the carrier, and has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of the vacuum box in the embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the main structure of the interior of the vacuum box in the embodiment of the utility model;

[0028] Figure 3 It is a schematic diagram of the side view structure inside the vacuum box in the embodiment of the utility model;

[0029] Figure 4 It is a structural schematic diagram of the liquid injection mechanism in the embodiment of the utility model;

[0030] Figure 5 It is a schematic diagram of the internal structure of the vehicle in a side view according to an embodiment of the utility model;

[0031] Figure 6 It is a schematic diagram of the internal structure of the vehicle in the embodiment of the utility model from a top view;

[0032] Figure 7 This is a schematic diagram of the internal structure of the vacuum box when the carrier is moved out in the embodiment of the utility model;

[0033] The following are marked in the figure: 1. vacuum box; 11. inflatable sealing ring; 2. three-way valve; 21. first interface; 22. second interface; 23. third interface; 3. box door opening and closing mechanism; 31. vacuum door; 32. support plate; 33. first linear guide rail; 34. lifting cylinder; 4. electric control mechanism; 41. aviation plug assembly; 5. infusion mechanism; 51. liquid distribution row; 52. electric proportional flow valve; 53. injection pipe; 54. infusion Liquid interface; 6. quantitative liquid injection mechanism; 61. weighing cup; 62. solenoid valve; 63. weighing sensor; 64. liquid injection cup; 65. sealing ring; 66. liquid injection needle; 7. lifting mechanism; 71. lifting motor; 72. lifting plate; 73. guide rod; 74. screw nut; 8. carrier; 81. placement groove; 82. liquid guide groove; 83. liquid storage area; 9. loading mechanism; 91. second linear guide rail; 92. telescopic cylinder. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0035] Example 1

[0036] like Figure 1 and Figure 2 As shown, this embodiment provides an electrolyte injection device, including a vacuum box 1 and an infusion mechanism 5, a quantitative injection mechanism 6, a lifting mechanism 7, a carrier 8 and an electric control mechanism 4 arranged in the cavity of the vacuum box 1.

[0037] like Figure 1 As shown, at least two cavities are provided in the vacuum box 1, and each of the cavities is provided with a set of infusion mechanism 5, quantitative injection mechanism 6, lifting mechanism 7 and carrier 8. The opening frame of the vacuum box 1 cavity is installed with an inflatable sealing ring 11, and is sealed by the box door opening and closing mechanism 3. In this embodiment, the vacuum box 1 is provided with an upper and lower cavity, and the two box door opening and closing mechanisms 3 are installed on two opposite sides of the vacuum box 1 in an upper and lower dislocation.

[0038] like Figure 1As shown, the box door opening and closing mechanism 3 includes a vacuum door 31, a first linear guide 33 and a lifting cylinder 34; the vacuum door 31 covers the opening of the cavity, and the first linear guide 33 and the lifting cylinder 34 are installed in parallel on the vacuum box 1; the telescopic shaft of the lifting cylinder 34 is connected to a support plate 32, one end of the support plate 32 is connected to the vacuum door 31, and the other end is connected to a slider, and the slider is slidably assembled on the first linear guide 33. The lifting cylinder 34 is controlled by the electric control mechanism 4, and drives the support plate 32 to rise or fall during operation, thereby driving the vacuum door 31 to cover or open. Among them, the surface of the inflatable sealing ring 11 has an inflatable joint. After being filled with compressed air, the sealing ring expands and is in close contact with the vacuum door 31, so that a sealed space is formed inside the vacuum box 1, and vacuum operation can be performed.

[0039] like Figure 2 As shown, the vacuum box 1 is also provided with a three-way valve 2, which includes a first interface 21, a second interface 22 and a third interface 23. The first interface 21 is connected to the cavity of the vacuum box 1, the second interface 22 is connected to a vacuum device such as a vacuum pump through a vacuum pipe, and the third interface 23 is connected to a vacuum breaking valve. Each interface uses an electric valve to achieve automatic control. The internal vacuum of the vacuum box 1 is fed back to the electric control mechanism 4 through a negative pressure gauge, and the internal vacuum degree is controlled by opening and closing the electric valve installed on the vacuum pipe to help inject liquid. Universal wheels are also installed at the bottom of the vacuum box 1 for easy movement.

[0040] like Figure 2 and Figure 3 As shown, the infusion mechanism 5 includes an infusion tube, a liquid separation row 51, multiple injection tubes 53 and an electric proportional flow valve 52 arranged on the injection tube 53; one end of the infusion tube is provided with an infusion interface 54, and the other end is connected to the liquid separation row 51, and each interface of the liquid separation row 51 is connected to the injection tube 53. The electric proportional flow valve 52 adopts PID control, and adjusts the valve opening according to the weight and flow feedback data to accurately control the input electrolyte.

[0041] like Figure 4 As shown, the quantitative injection mechanism 6 includes a weighing cup 61, a solenoid valve 62, a liquid injection cup 64 and a weighing sensor 63 connected in sequence. The weighing cup 61 is set in one-to-one correspondence with the liquid injection tube 53; the solenoid valve 62 is closed during weighing and opened during liquid injection; the weighing sensor 63 is installed on the outer circumference of the liquid injection cup 64 to weigh the electrolyte through weight changes; the liquid injection cup 64 is vertically installed below the solenoid valve 62, and there is a rib plate on the side of the liquid injection cup 64 for fixing at the weighing sensor 63; the bottom of the liquid injection cup 64 is connected to a liquid injection needle 66, which can be vertically inserted into the liquid injection hole of the battery for liquid injection; the circumferential end surface of the bottom of the liquid injection cup 64 is provided with a sealing ring 65, which can seal the surroundings of the liquid injection hole of the battery during liquid injection to prevent electrolyte from overflowing.

[0042] like Figure 2 and Figure 3As shown, the lifting mechanism 7 is connected to the quantitative injection mechanism 6 and is used to drive the quantitative injection mechanism 6 to move up and down. The lifting mechanism 7 includes a lifting motor 71, a screw, a lifting plate 72 and a guide rod 73; the lifting motor 71 is installed at the top of the vacuum box 1 cavity, the output shaft of the lifting motor 71 is connected to the screw, the lifting plate 72 is connected to the screw through the screw nut 74, and the quantitative injection mechanism 6 is installed on the lifting plate 72; there are multiple guide rods 73 and they are vertically installed inside the vacuum box 1, and the guide rods 73 are installed through the lifting plate 72 through the sliding sleeve. When the electrolyte is input into the weighing cup 61 through the injection pipe 53, as the liquid level rises, the lifting motor 71 works, and the quantitative injection mechanism 6 is driven to descend synchronously through the lifting plate 72 to improve the measurement accuracy. When the quantitative injection mechanism 6 moves to the bottom, the injection needle 66 is inserted into the injection hole of the battery. In this embodiment, there are four guide rods 73, which are evenly distributed, which is conducive to improving the lifting stability of the lifting plate 72.

[0043] In some other specific implementations, the lifting motor 71 and the lead screw may be replaced by a lead screw stepping motor.

[0044] like Figure 5 and Figure 6 As shown, the carrier 8 is provided with a plurality of placement grooves 81, and the placement grooves 81 are arranged one by one corresponding to the quantitative liquid injection mechanism 6. The size of the placement grooves 81 matches the size of the battery, is used to place the battery, and has a certain depth to prevent the battery from tipping over. By replacing the carrier 8, different specifications of batteries can be matched for liquid injection. The carrier 8 is also provided with a liquid storage area 83, and the placement grooves 81 are connected to the liquid storage area 83 through the liquid guide groove 82. When an abnormality occurs during liquid injection and the electrolyte flows out, the electrolyte flows to the liquid storage area 83 through the liquid guide groove 82 for temporary storage to prevent the electrolyte from accumulating at the bottom of the battery.

[0045] like Figure 1 As shown, the electric control mechanism 4 is used for automatic control of the whole device, including an electric control operation panel arranged on the outer side of the vacuum box 1. The electric control operation panel is electrically connected to the box door opening and closing mechanism 3 (such as the lifting cylinder 34, etc.), the infusion mechanism 5 (such as the electric proportional flow valve 52, etc.), the quantitative injection mechanism 6 (such as the solenoid valve 62, the weighing sensor 63, etc.) and the lifting mechanism 7 (such as the lifting motor 71, etc.) through the aviation plug assembly 4. The contact part of the aviation plug assembly 41 with the vacuum box 1 is provided with a sealing gasket to effectively seal the vacuum box.

[0046] The working principle of the electrolyte injection device provided in this embodiment is:

[0047] The electrolyte is injected from the infusion interface 54, and is injected into the weighing cup 61 through the infusion tube, the liquid distribution row 51, and the injection tube 53. Among them, the electric proportional flow valve 52 adopts PID control, and the valve opening is adjusted according to the weight and flow feedback data to accurately control the injected electrolyte; in the process of injecting the electrolyte into the weighing cup 61, the weighing sensor 63 weighs the electrolyte through the weight change and feeds back to the electronic control system 4 in real time, and the electronic control system 4 controls the lifting motor 71 to work, and drives the quantitative injection mechanism 6 to descend synchronously through the lifting plate 72; when the electrolyte mass reaches the set mass and the quantitative injection mechanism 6 moves to the bottom, the injection needle 66 is inserted into the injection hole of the battery; the solenoid valve 62 is opened, and the electrolyte in the weighing cup 61 is injected into the battery through the injection cup 64 and the injection needle 66; after the injection is completed, the lifting mechanism 7 drives the quantitative injection mechanism 6 to move up, completing an electrolyte injection.

[0048] Example 2

[0049] like Figure 1 to Figure 3 As shown, this embodiment provides an electrolyte injection device, including the structure in embodiment 1, and also including a loading mechanism 9, the loading mechanism 9 includes a telescopic cylinder 92 and a second linear guide rail 91 arranged in parallel at the bottom of the cavity of the vacuum box 1, the telescopic cylinder 92 is connected to the carrier 8, and a guide rail groove matching the second linear guide rail 91 is provided at the bottom of the carrier 8. When it is necessary to place a battery, the telescopic cylinder 92 is extended to push the carrier 8 to move to the outside of the vacuum box 1. After the battery is installed, the telescopic cylinder 92 is retracted, and the carrier 8 moves to the inside of the vacuum box 1, so that loading and unloading operations are convenient.

[0050] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by terms such as "front", "rear", "left", "right", "up", "down", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0051] In the description of the present invention, it is to be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electrolyte injection device, characterized in that: It includes a vacuum box and an infusion mechanism, a quantitative injection mechanism, a lifting mechanism and a carrier arranged in the vacuum box cavity; The infusion mechanism comprises a plurality of injection tubes and an electric proportional flow valve arranged on the injection tubes; The quantitative liquid injection mechanism comprises a weighing cup, a solenoid valve and a liquid injection cup connected in sequence, and the weighing cup and the liquid injection tube are arranged in a one-to-one correspondence; The lifting mechanism is connected to the quantitative liquid injection mechanism and is used to drive the quantitative liquid injection mechanism to perform lifting movement; The carrier is provided with a plurality of placement slots, and the placement slots are arranged in one-to-one correspondence with the quantitative liquid injection mechanisms.

2. The electrolyte injection device according to claim 1, characterized in that: At least two cavities are arranged in the vacuum box, each of which is provided with a group of infusion mechanism, quantitative injection mechanism, lifting mechanism and carrier. The opening frame of the cavity is installed with an inflatable sealing ring and is sealed by the box door opening and closing mechanism.

3. The electrolyte injection device according to claim 2, characterized in that: The box door opening and closing mechanism includes a vacuum door, a first linear guide rail and a lifting cylinder; The vacuum door covers the opening of the cavity, and the first linear guide rail and the lifting cylinder are installed in parallel on the vacuum box; The telescopic shaft of the lifting cylinder is connected to a support plate, one end of the support plate is connected to the vacuum door, and the other end is connected to a slider, and the slider is slidably assembled on the first linear guide rail.

4. The electrolyte injection device according to claim 1, characterized in that: The infusion mechanism also includes an infusion tube and a liquid separation row. One end of the infusion tube is provided with an infusion interface, and the other end is connected to the liquid separation row. Each interface of the liquid separation row is connected to the injection tube.

5. The electrolyte injection device according to claim 1, characterized in that: The quantitative injection mechanism also includes a weighing sensor, which is installed on the circumferential outer side of the injection cup. The bottom of the injection cup is connected to a liquid injection needle, and a sealing ring is provided on the circumferential end surface of the bottom of the injection cup.

6. The electrolyte injection device according to claim 1, characterized in that: The lifting mechanism comprises a lifting motor, a screw rod, a lifting plate and a guide rod; The lifting motor is installed on the top of the vacuum box cavity, the output shaft of the lifting motor is connected to the screw rod, the lifting plate is connected to the screw rod through the screw nut, and the quantitative injection mechanism is installed on the lifting plate; The guide rods are provided in plurality and are vertically installed inside the vacuum box. The guide rods are installed by penetrating the lifting plate through sliding sleeves.

7. The electrolyte injection device according to claim 1, characterized in that: The carrier is also provided with a liquid storage area, and the placement groove is connected with the liquid storage area through a liquid guide groove.

8. The electrolyte injection device according to claim 1, characterized in that: It also includes a loading mechanism, which includes a telescopic cylinder and a second linear guide rail arranged in parallel at the bottom of the vacuum box cavity, the telescopic cylinder is connected to the carrier, and the bottom of the carrier is provided with a guide rail groove matching the second linear guide rail.

9. The electrolyte injection device according to claim 1, characterized in that: The electric control mechanism also includes an electric control operation panel arranged on the outer side of the vacuum box, and the electric control operation panel is electrically connected to the infusion mechanism, the quantitative injection mechanism and the lifting mechanism through the aviation plug assembly.

10. The electrolyte injection device according to claim 1, characterized in that: The vacuum box is provided with a three-way valve, which includes a first interface, a second interface and a third interface. The first interface is connected to the cavity of the vacuum box, the second interface is connected to a vacuum device, and the third interface is connected to a vacuum breaking valve.

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