CN113270697A - Liquid injection device and battery liquid injection mechanism - Google Patents

Liquid injection device and battery liquid injection mechanism Download PDF

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Publication number
CN113270697A
CN113270697A CN202110531438.2A CN202110531438A CN113270697A CN 113270697 A CN113270697 A CN 113270697A CN 202110531438 A CN202110531438 A CN 202110531438A CN 113270697 A CN113270697 A CN 113270697A
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China
Prior art keywords
liquid injection
cavity
valve
outlet
piston head
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CN202110531438.2A
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Chinese (zh)
Inventor
袁维
彭榴
袁志凯
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Shenzhen Brothers Automation Technology Co ltd
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Shenzhen Brothers Automation Technology Co ltd
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Priority to CN202110531438.2A priority Critical patent/CN113270697A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The invention discloses a liquid injection device and a battery liquid injection mechanism, which comprise a pump body, a liquid injection device and a liquid injection mechanism, wherein the pump body is provided with a containing cavity and a liquid inlet and outlet communicated with the containing cavity; the piston head is tightly attached in the cavity; the linear driving mechanism is connected with the piston head and is used for driving the piston head to do linear reciprocating motion in the cavity; the three-way valve comprises a valve body with a valve cavity inside and a valve core arranged in the valve cavity; the valve cavity is provided with an inlet, an outlet and a communication port communicated with the liquid inlet and the liquid outlet of the pump body; the valve core has a first state of closing the outlet to conduct the inlet and the communication port and a second state of closing the inlet to conduct the outlet and the communication port under the action of external force. The precise calculation of the liquid injection amount at one time can be finished by controlling the movement stroke of the piston head; the liquid injection device has the advantages of large single liquid injection amount, small liquid injection error and few starting times of the driving mechanism, solves the problems that the precision of the liquid injection amount of the battery is difficult to control and the liquid injection cost is high, and has simple structure, low production cost and convenient digital intelligent pipeline and full closed loop control.

Description

Liquid injection device and battery liquid injection mechanism
Technical Field
The invention relates to the technical field of wide-range precise metering, in particular to a liquid injection device and a battery liquid injection mechanism.
Background
Metering pumps, particularly more precise metering pumps, are widely used in filling equipment in the fields of pharmacy, biological reagents, petrochemical industry, lithium battery industry and the like at present due to high-precision control of fluid metering and strong corrosion resistance. The existing metering pump generally comprises a motor, a pump head and a plug, wherein the motor pushes the plug to reciprocate in the pump head to cause the volume and pressure of a cavity of the pump head to change, so that the quantitative suction and discharge of liquid are realized; the output of the metering pump depends on the size of the pump head cavity and the stroke size of the plug. In order to avoid the influence of the abrasion of a pump head or the corrosion of a pump head by liquid on the liquid amount precision of a metering pump, the pump head and a plug of the metering pump in the prior art are generally made of ceramic materials with strong corrosion resistance.
The metering status of the power liquid injection pump in the lithium battery industry is a multi-stroke and small-metering accumulated metering mode, the precision is three thousandths, and the liquid injection amount of the power battery is about 200-1000 ml. The method is limited by the problems of large processing difficulty and high cost of ceramics, the liquid output of the conventional metering pump is about 20ml each time, for example, 50 strokes are needed for 1000ml, the more the strokes are, the larger the accumulated error is, the longer the time is, the lower the efficiency is, the motor needs to be started frequently, and the consistency is difficult to guarantee. Therefore, the defects of difficult liquid outlet precision control and high cost exist, and the large-scale production expansion of the power battery has the defects of larger and larger battery cell size, higher and higher energy density, longer electrolyte infiltration time and larger liquid injection amount, which causes larger liquid injection difficulty, so that the liquid injection mode of the conventional power battery needs to be improved.
Disclosure of Invention
Therefore, the invention aims to overcome the defects of low single liquid outlet amount, large accumulated multiple liquid injection error and low efficiency of a metering pump in the prior art, and provides a liquid injection device.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a liquid injection device comprises a pump body, a liquid injection device and a liquid injection device, wherein the pump body is provided with a cavity and a liquid inlet and outlet communicated with the cavity;
the piston head is tightly attached in the containing cavity;
the linear driving mechanism is connected with the piston head and is used for driving the piston head to do linear reciprocating motion in the containing cavity;
the three-way valve comprises a valve body with a valve cavity inside and a valve core arranged in the valve cavity; the valve cavity is provided with an inlet, an outlet and a communication port communicated with the liquid inlet and the liquid outlet of the pump body; the valve element has a first state in which the outlet is closed to communicate the inlet with the communication port and a second state in which the inlet is closed to communicate the outlet with the communication port under an external force.
Further, the pump body comprises a piston sleeve, a bottom plate hermetically connected to the bottom of the piston sleeve, and a cover plate hermetically connected to the top of the piston sleeve; the piston sleeve, the bottom plate and the cover plate enclose to form the containing cavity, the liquid inlet and outlet are arranged on the bottom plate, and the action end of the linear driving mechanism penetrates through the cover plate to be connected to the piston head.
Further, the piston sleeve is made of stainless steel AISI304 material.
Further, the piston head is made of stainless steel AISI304 material.
Further, the linear driving mechanism comprises a stepping motor and a screw shaft penetrating through the stepping motor, the screw shaft is connected to the piston head through a shaft connector, and the stepping motor drives the screw shaft to reciprocate along the axial direction of the screw shaft.
Further, a communication port of the three-way valve is connected with a joint, and the joint is connected to the bottom plate in a sealing mode.
Further, the three-way valve is an electromagnetic valve.
Further, the screw rod shaft is a flat shaft with external threads on the periphery and milled flat processing surfaces on two opposite sides.
Further, one end of the screw shaft is connected to the piston head through a needle bearing.
A battery electrolyte injection mechanism comprising:
the control device comprises a display screen and a PLC (programmable logic controller);
according to the liquid injection device, the linear driving mechanism of the liquid injection device is electrically connected with the PLC and is controlled and driven by the PLC;
and the battery weighing device is electrically connected with the PLC and is used for acquiring the weight information of the battery and sending the weight information of the battery to the PLC.
The technical scheme of the invention has the following advantages:
1. according to the liquid injection device provided by the invention, in the process of primary liquid injection, the valve core of the three-way valve is in the first state, the linear driving mechanism drives the piston head to move upwards, and liquid is pumped into the accommodating cavity of the pump body through the inlet and the communication port of the valve cavity; then the valve core of the three-way valve is switched from the first state to the second state, the communication port and the outlet of the valve cavity are communicated, the inlet is closed, the piston head is driven by the linear driving mechanism to move downwards, and liquid in the containing cavity is discharged outwards through the communication port and the outlet to finish primary liquid injection. The precise calculation of the liquid injection amount at one time can be completed by controlling the movement stroke of the piston head and combining the bottom area of the cavity. When adopting this kind of priming device to annotate liquid to the battery, the single notes liquid volume is big, and it is little to annotate the liquid error, and linear drive mechanism's the number of times of starting is few, has solved the battery and has annotated the liquid volume precision and be difficult to control, annotate the problem with high costs, breaks through the bottleneck that annotates liquid efficiency only for 20g/s in the industry at present, and the highest liquid efficiency of annotating is up to 50g/s, simple structure moreover, convenient to use, low in production cost, the intelligent pipeline of the digitization and the full cut-off ring control of being convenient for.
2. The liquid injection device provided by the invention has the advantages that the pump body formed by combining the bottom plate, the cover plate and the piston sleeve is good in sealing performance, the piston sleeve with larger size is easy to manufacture, and the liquid injection efficiency is convenient to improve.
3. According to the liquid injection device provided by the invention, as the stainless steel AISI304 material has the advantages of good wear resistance, corrosion resistance, easiness in processing and production and the like, the piston sleeve and the piston head made of the stainless steel AISI304 material are easier to manufacture into a large-size piston sleeve compared with the piston sleeve and the piston head made of ceramic materials in the prior art, the processing cost is low, the single maximum liquid injection amount of the liquid injection device is favorably and greatly increased, and the liquid injection efficiency is improved.
4. According to the liquid injection device provided by the invention, the linear driving mechanism consisting of the stepping motor and the screw rod shaft controls the output pulse number of the stepping motor through the PLC, and the stroke of the piston head can be accurately controlled by combining the characteristic of high precision of a screw rod transmission mode, so that the liquid injection precision is improved.
5. According to the liquid injection device provided by the invention, the joint between the three-way valve and the bottom plate is in sealing connection with the bottom plate, so that the liquid injection device has the advantages of good sealing performance and difficulty in liquid leakage, and is beneficial to reducing liquid injection errors caused by liquid leakage.
6. According to the liquid injection device provided by the invention, the three-way valve is a battery valve adopting electromagnetic control, and the automatic control of action switching of the three-way valve can be realized.
7. According to the liquid injection device provided by the invention, the periphery of the screw shaft is provided with the external threads, the two opposite sides of the screw shaft are provided with the milling flat processing surfaces, and the milling flat processing surfaces can play a role in guiding the screw shaft up and down, so that the play of the screw shaft in the motion process is prevented, and the motion stroke of the screw shaft is conveniently and accurately controlled.
8. The needle roller bearing of the liquid injection device provided by the invention has the advantages of small friction resistance, small power consumption, high mechanical efficiency, small abrasion and long service life, and can provide stable support for the screw shaft, reduce the abrasion and enable the screw shaft to run more smoothly.
9. According to the battery liquid injection mechanism provided by the invention, the battery weighing device can obtain the weight information of the battery and send the weight information of the battery to the PLC, the PLC compares the weight information of the battery with the expected weight information of the battery after liquid injection, if the actual weight has deviation, a compensation value is calculated through a volume formula, and then the pulse number of the stepping motor is controlled to change the motion stroke of the piston head, and the liquid injection amount difference is additionally injected into the battery, so that the liquid injection precision of the battery is improved.
In conclusion, the single injection amount of the battery injection mechanism is large, the bottleneck that the injection efficiency in the current industry is only 20g/s is broken through, the highest injection efficiency is as high as 50g/s, the technical barrier that the injection precision of the existing battery in the industry is 3 per thousand is broken through, and the injection precision is linearly improved to 1 per thousand; the requirement of large-volume liquid injection of a battery with large-capacity power can be met; and the structure is simple, the operation is smooth, the pump is not easy to block, the use is convenient, the production cost is low, the digital intelligent pipeline and full closed loop control are convenient, and the customized production can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of an overall structure of a liquid injection device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a fluid injection apparatus in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a three-way valve in a first state according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of the three-way valve in the second state according to the embodiment of the present invention.
Description of reference numerals: 1. a pump body; 11. a piston sleeve; 12. a base plate; 13. a cover plate; 111. a liquid inlet and outlet; 2. a piston head; 3. a stepping motor; 4. a screw shaft; 5. a three-way valve; 51. a valve body; 52. a valve core; 53. an inlet; 54. an outlet; 55. a communication port; 6. a shaft connector; 7. and (4) a joint.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
A priming device as shown in figures 1-4 comprises a pump body 1, a piston head 2, a linear drive mechanism and a three-way valve 5. The pump body 1 comprises a piston sleeve 11, a bottom plate 12 connected to the bottom of the piston sleeve 11 in a sealing mode, and a cover plate 13 connected to the top of the piston sleeve 11 in a sealing mode; the piston sleeve 11, the bottom plate 12 and the cover plate 13 enclose to form a containing cavity, and the bottom plate 12 is provided with a liquid inlet and outlet 111 for fluid to enter and exit the containing cavity; the piston head 2 is tightly attached in the cavity. The pump body 1 formed by combining the bottom plate 12, the cover plate 13 and the piston sleeve 11 has good sealing performance, and the piston sleeve 11 with larger size is easy to manufacture, so that the liquid injection efficiency is convenient to improve.
The linear driving mechanism comprises a stepping motor 3 and a screw shaft 4 penetrating through the stepping motor 3, one end of the screw shaft 4 penetrates through a cover plate 13 to be connected to the piston head 2, and the stepping motor 3 drives the screw shaft 4 to do linear reciprocating motion along the axial direction of the screw shaft to drive the piston head 2 to do linear reciprocating motion in the piston sleeve 11. The linear driving mechanism consisting of the stepping motor 3 and the screw rod shaft 4 controls the output pulse number of the stepping motor 3 through the PLC, and can accurately control the stroke of the piston head 2 by combining the characteristic of high precision of a screw rod transmission mode, so that the liquid injection precision is improved.
The three-way valve 5 comprises a valve body 51 with a valve cavity inside and a valve core 52 arranged in the valve cavity; the valve chamber has an inlet 53, an outlet 54, and a communication port 55, and the communication port 55 of the three-way valve 5 is sealingly connected to the liquid inlet/outlet port 111 of the pump body 1 by a joint 7. The inlet 53 of the valve chamber communicates with the reservoir and the outlet 54 of the valve chamber communicates with the product to be injected (e.g. a lithium battery). The valve body 52 has a first state in which the outlet 54 is closed to communicate with the inlet 53 and the communication port 55 and a second state in which the inlet 53 is closed to communicate with the outlet 54 and the communication port 55 by an external force.
In the liquid injection device, in the process of primary liquid injection, a valve core 52 of a three-way valve 5 is in a first state firstly, a stepping motor 3 drives a screw rod shaft 4 and a piston head 2 to move upwards, and liquid is pumped into a cavity of a pump body 1 through an inlet 53 and a communication port 55 of a valve cavity; then the valve core 52 of the three-way valve 5 is switched from the first state to the second state, the communication port 55 and the outlet 54 of the valve cavity are communicated, the inlet 53 is closed, the stepping motor 3 drives the screw shaft 4 and the piston head 2 to move downwards, and the liquid in the cavity is discharged outwards through the communication port 55 and the outlet 54, so that primary liquid injection is completed. By controlling the movement stroke of the piston head 2 and combining the bottom area of the cavity, the accurate calculation of the one-time liquid injection amount can be completed. When adopting this kind of priming device to annotate liquid to the battery, the single volume of annotating is big, and the accumulative error of annotating liquid many times is little, and step motor 3's the number of times of starting is few, has solved battery and has annotated the liquid volume precision and be difficult to control, annotate the problem with high costs, breaks through the bottleneck that annotates liquid efficiency only for 20g/s in the current industry, and the highest efficiency of annotating liquid reaches 50g/s, simple structure moreover, convenient to use, low in production cost, the intelligent pipeline of the digitization and the full cut-off loop control of being convenient for.
In this embodiment, the bottom plate 12 is fixed to the bottom of the piston housing 11 by a plurality of screws, and the cover plate 13 is fixed to the top of the piston housing 11 by a plurality of screws. An O-shaped sealing ring with strong corrosion resistance is arranged between the bottom plate 12 and the piston sleeve 11 in a cushioning mode, and an O-shaped sealing ring with strong corrosion resistance is also arranged between the cover plate 13 and the piston sleeve 11 in a cushioning mode. So set up, can guarantee the leakproofness of the pump body 1, prevent the influence of weeping phenomenon to annotating the liquid volume precision.
In this embodiment the gap between the outer wall of the piston head 2 and the inner wall of the piston sleeve 11 is cushioned with 80 sealing rings. The outer wall of the piston head 2 is provided with an annular clamping groove, one part of the 80 sealing ring is embedded in the annular clamping groove, and the other part of the 80 sealing ring protrudes out of the annular clamping groove to be tightly abutted against the inner wall of the piston sleeve 11. The number of the 80 sealing rings is two, and the two sealing rings are respectively positioned at the upper end and the lower end of the piston head 2 in the axial direction, so that the piston head 2 and the piston sleeve 11 can slide relatively, and simultaneously, a gap is kept to be well sealed, and the liquid seepage phenomenon is prevented.
In the embodiment, the screw shaft 4 is connected to the top of the piston head 2 through a shaft connector 6, and an inverted T-shaped chuck is arranged at one end of the screw shaft 4 facing the piston head 2 and is clamped on the shaft connector 6 with an inverted T-shaped clamping groove. A needle bearing is arranged between the inverted T-shaped clamping head and the shaft connecting piece 6. The needle roller bearing has the advantages of small friction resistance, small power consumption, high mechanical efficiency, small abrasion and long service life, can provide stable support for the screw rod shaft 4, reduces abrasion and enables the screw rod shaft 4 to run more smoothly.
In this embodiment, the piston sleeve 11 and the piston head 2 are both made of stainless steel AISI304 material. Because stainless steel AISI304 material has advantages such as the wearability is good, corrosion-resistant, easy processing production, adopts piston sleeve 11 and piston head 2 that stainless steel AISI304 material made, compares with piston sleeve 11 and piston head 2 that adopt ceramic material to make among the prior art, makes into large-size piston sleeve 11 more easily, and the processing cost is low moreover, is favorable to improving the single biggest notes liquid volume of priming device by a wide margin, improves and annotates liquid efficiency.
In this embodiment, an O-ring seal is disposed between the joint 7 and the bottom plate 12 connected to the three-way valve 5 to ensure sealing performance and reduce the influence of liquid leakage on the liquid injection accuracy.
In this embodiment, the three-way valve 5 is a battery valve that is electromagnetically controlled, and it is possible to automatically control the switching of the operation of the valve element 52 on the three-way valve 5.
In this embodiment, the outer periphery of the screw shaft 4 has external threads and opposite sides have milling flat processing surfaces, and the milling flat processing surfaces can play a role in guiding the screw shaft 4 up and down, so that play in the movement process of the screw shaft 4 is prevented, and the movement stroke of the screw shaft 4 is conveniently and accurately controlled.
The embodiment of the invention also provides a battery liquid injection mechanism, which comprises: the control device comprises a display screen and a PLC (programmable logic controller); according to the liquid injection device in the embodiment, the linear driving mechanism of the liquid injection device is electrically connected with the PLC and is controlled and driven by the PLC; and the battery weighing device is electrically connected with the PLC and used for acquiring the weight information of the battery and sending the weight information of the battery to the PLC. The battery weighing device can obtain the weight information of the battery and send the weight information of the battery to the PLC controller, the PLC controller compares the weight information of the battery with the expected weight information of the battery after liquid injection, if the actual weight is deviated, a compensation value is calculated through a volume formula, the pulse number of the stepping motor 3 is controlled, the movement stroke of the piston head 2 is changed, and the liquid injection quantity difference is additionally injected into the battery, so that the liquid injection precision of the battery is improved.
To sum up, this kind of battery annotates liquid mechanism has following advantage:
1-more reassurance: the problem of pump blockage in the liquid injection process of the power battery at home and abroad is solved, and the power battery is smooth in operation and never blocks the pump;
2-larger amounts: in order to meet the special requirements of a large amount of liquid injection of the power battery, the single liquid injection amount can be customized and improved, and 1-8 ways of free matching are realized;
3-higher efficiency: the bottleneck that the liquid injection efficiency in the current industry is only 20g/s is broken through, and the highest liquid injection efficiency is as high as 50 g/s;
4-more accurate: the existing 3 per mill technical barrier of the industry is broken; the injection precision is linearly improved to 1 per thousand;
5-more intelligent: the full-series intelligent digital system supports an I/O communication mode, is automatically calibrated, is fully closed-loop detected and can be customized and developed;
6-more professional: a pneumatic pump, a ceramic pump, a power battery liquid supply system and the like, and provides solutions in a whole series;
7-more stable: the maintenance of the crushing industry takes more than 30 minutes, only the sealing ring needs to be replaced within half a year, and the problem can be easily solved within 5 minutes;
8-quieter: comprehensive noise reduction treatment is carried out, no noise exists in the operation process, and a more comfortable working environment is provided for users;
9-saving money: the cost of the whole process is controlled, the comprehensive cost is reduced by 50 percent, and ultrahigh cost performance is brought to customers;
10-safer: the water-saving device does not need an air source, avoids the hidden trouble of exceeding the standard of water caused by the water in the air source, and is safe and reliable.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A priming device, comprising:
the pump body (1) is provided with a cavity and a liquid inlet and outlet (111) communicated with the cavity;
the piston head (2) is tightly attached in the containing cavity;
the linear driving mechanism is connected with the piston head (2) and is used for driving the piston head (2) to do linear reciprocating motion in the cavity;
the three-way valve (5) comprises a valve body (51) with a valve cavity inside and a valve core (52) arranged in the valve cavity; the valve cavity is provided with an inlet (53), an outlet (54) and a communication port (55) communicated with the liquid inlet and outlet (111) of the pump body (1); the valve body (52) has a first state in which the outlet (54) is closed to communicate with the inlet (53) and the communication port (55) and a second state in which the inlet (53) is closed to communicate with the outlet (54) and the communication port (55) by an external force.
2. The filling device according to claim 1, wherein the pump body (1) comprises a piston sleeve (11), a bottom plate (12) hermetically connected to the bottom of the piston sleeve (11), and a cover plate (13) hermetically connected to the top of the piston sleeve (11); the piston sleeve (11), the bottom plate (12) and the cover plate (13) are enclosed to form the containing cavity, the liquid inlet and outlet (111) is formed in the bottom plate (12), and the action end of the linear driving mechanism penetrates through the cover plate (13) to be connected to the piston head (2).
3. The injection device according to claim 1, wherein the piston sleeve (11) is made of stainless steel AISI304 material.
4. Injection device according to claim 1, characterized in that the piston head (2) is made of stainless steel AISI304 material.
5. The injection device according to claim 1, wherein the linear driving mechanism comprises a stepping motor (3) and a screw shaft (4) penetrating through the stepping motor (3), the screw shaft (4) is connected to the piston head (2) through a shaft connector (6), and the stepping motor (3) drives the screw shaft (4) to reciprocate along the axial direction of the screw shaft.
6. The filling device according to claim 2, wherein a joint (7) is connected to the communication port (55) of the three-way valve (5), and the joint (7) is hermetically connected to the bottom plate (12).
7. Priming device according to claim 1, characterized in that the three-way valve (5) is a solenoid valve.
8. The injection device according to claim 5, wherein the screw shaft (4) is a flat shaft having an external thread on the outer periphery and milled flat surfaces on opposite sides.
9. Priming device according to claim 5, characterized in that one end of the screw shaft (4) is connected to the piston head (2) by means of a needle bearing.
10. A battery electrolyte injection mechanism, comprising:
the control device comprises a display screen and a PLC (programmable logic controller);
the liquid injection device according to any one of claims 1 to 9, wherein a linear driving mechanism of the liquid injection device is electrically connected with the PLC controller and is controlled and driven by the PLC controller;
and the battery weighing device is electrically connected with the PLC and is used for acquiring the weight information of the battery and sending the weight information of the battery to the PLC.
CN202110531438.2A 2021-05-14 2021-05-14 Liquid injection device and battery liquid injection mechanism Pending CN113270697A (en)

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Cited By (3)

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CN114552148A (en) * 2022-03-21 2022-05-27 深圳市格林晟科技有限公司 Centrifugal battery liquid injection mechanism and liquid injection method thereof
CN115822909A (en) * 2022-10-25 2023-03-21 深圳市铂纳特斯自动化科技有限公司 Lithium battery liquid injection metering pump and control system thereof
WO2024088669A1 (en) * 2022-10-25 2024-05-02 Industrie-Partner Gmbh Radebeul-Coswig Filling device for filling rigid-walled battery cells with an electrolyte liquid

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Application publication date: 20210817