CN216842080U - Liquid injection pump and liquid injection system - Google Patents

Liquid injection pump and liquid injection system Download PDF

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Publication number
CN216842080U
CN216842080U CN202120717058.3U CN202120717058U CN216842080U CN 216842080 U CN216842080 U CN 216842080U CN 202120717058 U CN202120717058 U CN 202120717058U CN 216842080 U CN216842080 U CN 216842080U
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plunger
shell
motor
liquid
injection
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CN202120717058.3U
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Chinese (zh)
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程相印
王海风
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Shenzhen Dacheng Intelligent Control Technology Co ltd
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Shenzhen Dacheng Intelligent Control Technology Co ltd
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Abstract

The utility model belongs to the technical field of battery production, in particular to a liquid injection pump and a liquid injection system, wherein the liquid injection pump comprises a shell, a motor, a plunger and an electromagnetic valve; the shell is of a hollow columnar structure, one end of the shell forms an injection cavity, and the injection cavity is provided with a liquid inlet and a liquid outlet; the motor is arranged at one end, far away from the injection cavity, in the shell, and a threaded sleeve is arranged on an output shaft of the motor; the plunger is arranged in the shell, one end of the plunger is in threaded fit with the threaded sleeve, and the other end of the plunger is provided with a piston which extends into the injection cavity; the electromagnetic valve is arranged on the shell and used for controlling the liquid inlet or the liquid outlet to be communicated with the injection cavity alternatively; the shell is further provided with a stroke detection assembly for detecting the axial moving distance of the plunger. The utility model discloses set up the stroke detection subassembly with the stroke that detects the plunger, eliminated the metering error that the thread clearance leads to, the precision is high.

Description

Liquid injection pump and liquid injection system
Technical Field
The utility model belongs to the technical field of the battery production, especially, relate to a liquid charge pump and notes liquid system.
Background
The soft package lithium battery is internally provided with liquid lithium ions, namely battery liquid, and the outside of the soft package lithium battery is sleeved with a layer of polymer shell. Structurally, the aluminum plastic film is adopted for packaging, and when the aluminum plastic film is overheated and expanded inside, the outer packaging aluminum film is only expanded and cracked, so that explosion is avoided, and the safety is high.
In the production process of the pouch battery, it is necessary to inject a battery fluid into the inside. Since the battery is generally small in volume, less battery fluid is injected into a single battery, and therefore the precision requirement for the syringe pump is high.
The types of injection pumps are more, wherein, the plunger type injection pump is more suitable for injecting the battery liquid due to the good sealing performance of the injection cavity. However, the plunger type injection pump usually uses a screw connection to drive the plunger to move, and a transmission screw has a gap when the forward direction and the reverse direction are switched, so that the metering is not accurate enough and the precision is not high.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the utility model is to provide a priming pump and notes liquid system aims at solving the plunger type syringe pump and uses threaded connection drive plunger motion usually, and there is the clearance transmission screw thread when positive reverse switches, causes the measurement inaccurate enough, problem that the precision is not high.
The embodiment of the utility model provides a realize like this, a priming pump, priming pump includes casing, motor, plunger and solenoid valve;
the shell is of a hollow columnar structure, one end of the shell forms an injection cavity, and the injection cavity is provided with a liquid inlet and a liquid outlet;
the motor is arranged at one end, far away from the injection cavity, in the shell, and a threaded sleeve is arranged on an output shaft of the motor;
the plunger is arranged in the shell, one end of the plunger is in threaded fit with the threaded sleeve, and the other end of the plunger is provided with a piston which extends into the injection cavity;
the electromagnetic valve is arranged on the shell and used for controlling the liquid inlet or the liquid outlet to be communicated with the injection cavity alternatively;
the shell is further provided with a stroke detection assembly for detecting the axial moving distance of the plunger.
Preferably, the shell is of a square sectional structure, and the sections are connected in sequence through screws.
Preferably, the housing includes a sealing section, the sealing section is disposed in front of the injection cavity, the sealing section is in sliding fit with the plunger, and at the fitting position, the plunger and the sealing section are made of ceramic materials.
Preferably, the housing is further provided with a rotation stopping structure, and the rotation stopping structure is used for preventing the plunger from rotating relative to the housing.
Preferably, the rotation stopping structure comprises a rotation stopping groove and a rotation stopping block;
one of the rotation stopping groove and the rotation stopping block is arranged on the shell, the other is arranged on the plunger, and when the plunger slides along the shell, the rotation stopping groove and the rotation stopping block slide relatively; the length direction of the rotation stopping groove is arranged along the axial direction of the plunger.
Preferably, the stroke detection assembly comprises a detected block arranged on the plunger and a distance sensor arranged on the shell, and the distance sensor is opposite to the detected block.
Preferably, the distance sensor is an eddy current sensor.
Preferably, the output shaft of the motor is in transmission connection with the threaded sleeve through a coupling.
Preferably, the motor is a stepping motor.
Another object of the embodiment of the present invention is to provide an injection system, the injection system includes:
the liquid injection pump provided by the embodiment of the utility model; and
and the control device is respectively electrically connected with the motor of the liquid injection pump and the stroke detection assembly and is used for controlling the motor to move according to a set value and a detection value of the stroke detection assembly.
The liquid injection pump provided by the embodiment of the utility model drives the screw sleeve to rotate through the motor, the screw sleeve is in threaded connection with the plunger, and the rotation of the screw sleeve can drive the plunger to reciprocate; the shell is provided with an electromagnetic valve, and one of the liquid inlet and the liquid outlet can be communicated with the liquid injection cavity through the electromagnetic valve, so that liquid injection or liquid extraction is realized; still be provided with stroke determine module on the casing, thereby obtain the injection volume through the displacement of stroke determine module direct detection plunger, detection error when can effectively avoiding leading to the fact the switching-over because of the thread clearance to improve the measurement accuracy.
Drawings
FIG. 1 is an overall structure diagram of a liquid injection pump according to an embodiment of the present invention;
FIG. 2 is a partial structural view of a liquid-filling pump according to an embodiment of the present invention;
FIG. 3 is a second partial structural view of a liquid-filling pump according to an embodiment of the present invention;
FIG. 4 is a third partial structural view of a liquid-filling pump according to an embodiment of the present invention;
FIG. 5 is a structural diagram of an injection cavity of the infusion pump provided by the embodiment of the present invention;
fig. 6 is a structural diagram of a seal section of a liquid injection pump provided by the embodiment of the invention.
In the drawings: 1. an electromagnetic valve; 2. a liquid inlet; 3. a liquid outlet; 4. a sealing section; 5. a housing; 6. a motor; 7. a coupling; 8. a plunger; 9. an injection cavity; 10. a threaded sleeve; 11. a block to be detected; 12. a distance sensor; 13. a rotation stopping groove; 14. and a rotation stopping block.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description is provided for the specific embodiments of the present invention.
As shown in fig. 1-6, for the structure diagram of the liquid injection pump provided by the embodiment of the present invention, the liquid injection pump comprises a housing 5, a motor 6, a plunger 8 and an electromagnetic valve 1;
the shell 5 is of a hollow columnar structure, an injection cavity 9 is formed at one end of the shell, and the injection cavity 9 is provided with a liquid inlet 2 and a liquid outlet 3;
the motor 6 is arranged at one end, far away from the injection cavity 9, in the shell 5, and a threaded sleeve 10 is arranged on an output shaft of the motor 6;
the plunger 8 is arranged in the shell 5, one end of the plunger is in threaded fit with the threaded sleeve 10, and the other end of the plunger is provided with a piston which extends into the injection cavity 9;
the electromagnetic valve 1 is arranged on the shell 5 and used for controlling one of the liquid inlet 2 or the liquid outlet 3 to be communicated with the injection cavity 9;
and the shell 5 is also provided with a stroke detection assembly for detecting the axial movement distance of the plunger 8.
In the embodiment of the present invention, the hollow cylindrical structure of the housing 5 preferably adopts a cylindrical hollow structure, and the injection cavity 9 may also adopt a cylindrical structure. The plunger 8 may be of cylindrical configuration and comprises a piston head, which may be of slightly larger diameter than the piston rod, and a piston rod which is a sliding fit with the inner diameter of the injection chamber 9.
The embodiment of the utility model provides an in, inlet 2 and liquid outlet 3 have been seted up respectively to injection chamber 9 both sides, and inlet 2 and liquid outlet 3 are not direct and injection chamber 9 intercommunication, but with solenoid valve 1 intercommunication, and injection chamber 9 communicates with solenoid valve 1 equally, through the break-make of control solenoid valve 1, can make inlet 2 or liquid outlet 3 communicate with injection chamber 9 respectively to realize drawing liquid or annotate the liquid. This connection and the manner of use of the solenoid valve 1 are conventional and can be achieved with reference to the prior art.
The embodiment of the utility model provides an in, still be provided with the determine module on the casing 5, can directly detect the displacement of plunger 8 for casing 5 through the determine module to reach the actual position of plunger 8, can confirm through the relation of displacement and injection chamber 9 diameters promptly and annotate the liquid volume. Compared with the prior art, the metering is realized through the rotation angle of the motor 6, and the metering error caused by the thread clearance can be effectively avoided.
The liquid injection pump provided by the embodiment of the utility model drives the threaded sleeve 10 to rotate through the motor 6, the threaded sleeve 10 is in threaded connection with the plunger 8, and the plunger 8 can be driven to reciprocate by the rotation of the threaded sleeve 10; the shell 5 is provided with an electromagnetic valve 1, and one of the liquid inlet 2 or the liquid outlet 3 can be communicated with the liquid injection cavity through the electromagnetic valve 1, so that liquid injection or liquid extraction is realized; still be provided with stroke determine module on the casing 5, thereby obtain the injection volume through the displacement of stroke determine module direct detection plunger 8, detection error when can effectively avoiding leading to the fact the switching-over because of the thread clearance to improve the measurement accuracy.
In one embodiment of the present invention, the housing 5 is a square sectional structure, and the sections are connected in sequence by screws.
The embodiment of the utility model provides an in, casing 5 adopts the sectional type structure, and the part that can be convenient for casing 5 is unpack apart to in maintenance, and each section preferably adopts replaceable structure, and the structure of each section is identical promptly, can exchange, thereby improves the convenience of changing, equipment.
In an embodiment of the present invention, the housing 5 includes a sealing section 4, the sealing section 4 is disposed in front of the injection cavity 9, the sealing section 4 is in sliding fit with the plunger 8, and the plunger 8 and the sealing section 4 are made of ceramic materials.
The embodiment of the utility model provides an in, set up sealed section 4 and can prevent that electrolyte from oozing, adopt ceramic material's sealed section 4, can effectively avoid the corruption of electrolyte, and ceramic material's hardness is high, and surface finish is good, and is sealed reliable. In addition, the front and the back of the sealing section 4 can be provided with conventional sealing rings to further enhance the sealing effect. It will be appreciated that the piston only moves within the injection chamber 9, the maximum displacement of which is against the two ends of the injection chamber 9.
As shown in fig. 4, in an embodiment of the present invention, a rotation stopping structure is further disposed on the housing 5, and the rotation stopping structure is configured to prevent the plunger 8 from rotating relative to the housing 5.
In the embodiment of the present invention, since the screw sleeve 10 and the plunger 8 are connected by a screw thread to drive the plunger 8 to reciprocate, the rotation stopping structure needs to be provided for the plunger 8 to prevent the plunger 8 from rotating relative to the housing 5 or the screw sleeve 10.
As shown in fig. 4, in an embodiment of the present invention, the rotation stopping structure includes a rotation stopping groove 13 and a rotation stopping block 14;
one of the rotation stopping groove 13 and the rotation stopping block 14 is arranged on the shell 5, and the other is arranged on the plunger 8, and when the plunger 8 slides along the shell 5, the rotation stopping groove 13 and the rotation stopping block 14 slide relatively; the rotation preventing groove 13 is provided along the axial direction of the plunger 8 in the longitudinal direction.
In the embodiment of the present invention, optionally, the rotation stopping groove 13 may be disposed on the housing 5, or may be disposed on the plunger 8, and in cooperation therewith, the rotation stopping block 14 may be disposed on the plunger 8, or may be disposed on the housing 5. Two combinations are selectable. In the embodiment of the present invention, the length direction of the rotation stopping groove 13 is arranged along the axial direction of the plunger 8, and when the plunger 8 moves, the rotation stopping block 14 just moves along the length direction of the rotation stopping groove 13.
As shown in fig. 1-4, in an embodiment of the present invention, the stroke detecting assembly includes a detected block 11 disposed on the plunger 8 and a distance sensor 12 disposed on the housing 5, and the distance sensor 12 is disposed opposite to the detected block 11.
In the embodiment of the present invention, the detected block 11 is disposed on the plunger 8, preferably located at an end of the plunger 8 far away from the piston head, so as to avoid the influence of the electrolyte on the detecting component.
In an embodiment of the present invention, the distance sensor 12 is an eddy current sensor.
The embodiment of the utility model provides an in, eddy current sensor can realize non-contact and detect, and the precision is high, and the installation is simple.
In an embodiment of the present invention, the output shaft of the motor 6 is in transmission connection with the screw sleeve 10 through the coupling 7.
In an embodiment of the present invention, the motor 6 is a stepping motor 6.
The embodiment of the utility model provides an in, adopt step motor 6 can make the corner of motor 6 change in accurate control.
The embodiment of the utility model provides a still provide an annotate liquid system, it includes to annotate the liquid system:
the liquid injection pump provided by the embodiment of the utility model; and
and the control device is respectively electrically connected with the motor 6 of the liquid injection pump and the stroke detection assembly and is used for controlling the motor 6 to move according to a set value and a detection value of the stroke detection assembly.
In the embodiment of the present invention, please refer to the combination of any one or more of the foregoing embodiments for the specific explanation of the injection pump, the embodiment of the present invention is not repeated here, in the embodiment of the present invention, the control device is further provided, the control device herein can be specifically a PLC controller, or a control module integrated with a control chip, etc. The control device calculates the liquid injection amount through the displacement of the plunger 8 detected by the acquisition sensor, and stops moving or moves reversely when the liquid injection amount is equal to a set value. The same amount of electrolyte can be respectively injected into a plurality of soft package batteries by repeating the process.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The liquid injection pump is characterized by comprising a shell, a motor, a plunger and an electromagnetic valve;
the shell is of a hollow columnar structure, one end of the shell forms an injection cavity, and the injection cavity is provided with a liquid inlet and a liquid outlet;
the motor is arranged at one end, far away from the injection cavity, in the shell, and a threaded sleeve is arranged on an output shaft of the motor;
the plunger is arranged in the shell, one end of the plunger is in threaded fit with the threaded sleeve, and the other end of the plunger is provided with a piston which extends into the injection cavity;
the electromagnetic valve is arranged on the shell and used for controlling the liquid inlet or the liquid outlet to be communicated with the injection cavity alternatively;
the shell is further provided with a stroke detection assembly for detecting the axial moving distance of the plunger.
2. The infusion pump of claim 1, wherein the housing is of a square segmented construction, the segments being connected in series by screws.
3. The infusion pump of claim 2, wherein the housing includes a sealing section disposed in front of the injection chamber, the sealing section being in sliding engagement with the plunger, and wherein the plunger and the sealing section are both made of a ceramic material.
4. The infusion pump of claim 1, wherein the housing is further provided with a rotation stop feature for preventing rotation of the plunger relative to the housing.
5. The infusion pump of claim 4, wherein the rotation stop structure comprises a rotation stop groove and a rotation stop block;
one of the rotation stopping groove and the rotation stopping block is arranged on the shell, the other is arranged on the plunger, and when the plunger slides along the shell, the rotation stopping groove and the rotation stopping block slide relatively; the length direction of the rotation stopping groove is arranged along the axial direction of the plunger.
6. The infusion pump according to claim 1, wherein the stroke detection assembly includes a block to be detected provided on the plunger, and a distance sensor provided on the housing, the distance sensor being provided directly opposite to the block to be detected.
7. The infusion pump of claim 6, wherein the distance sensor is an eddy current sensor.
8. The infusion pump of claim 1, wherein the output shaft of the motor is in drive connection with the threaded sleeve through a coupling.
9. The infusion pump of claim 1, wherein the motor is a stepper motor.
10. A priming system, characterized in that the priming system comprises:
an infusion pump as claimed in any one of claims 1 to 9; and
and the control device is respectively electrically connected with the motor of the liquid injection pump and the stroke detection assembly and is used for controlling the motor to move according to a set value and a detection value of the stroke detection assembly.
CN202120717058.3U 2021-04-07 2021-04-07 Liquid injection pump and liquid injection system Active CN216842080U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120717058.3U CN216842080U (en) 2021-04-07 2021-04-07 Liquid injection pump and liquid injection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120717058.3U CN216842080U (en) 2021-04-07 2021-04-07 Liquid injection pump and liquid injection system

Publications (1)

Publication Number Publication Date
CN216842080U true CN216842080U (en) 2022-06-28

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Application Number Title Priority Date Filing Date
CN202120717058.3U Active CN216842080U (en) 2021-04-07 2021-04-07 Liquid injection pump and liquid injection system

Country Status (1)

Country Link
CN (1) CN216842080U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117450036A (en) * 2023-12-25 2024-01-26 深圳市铂纳特斯智能装备股份有限公司 A high-speed liquid injection pump for annotating liquid to battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117450036A (en) * 2023-12-25 2024-01-26 深圳市铂纳特斯智能装备股份有限公司 A high-speed liquid injection pump for annotating liquid to battery

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