Liquid injection leakage and less injection detection device and liquid injection leakage and less injection detection method

Abstract

The invention discloses a liquid injection leakage and less injection detection device and method, and the device comprises a main body which is provided with a liquid inlet and a liquid outlet, and a fluid channel is disposed between the liquid inlet and the liquid outlet; a floating ball is arranged in the fluid channel and can reciprocate in the fluid channel; and the main body is provided with an inductor corresponding to the connecting end of the fluid channel and the liquid inlet. According to the invention, the floating ball is arranged in the fluid channel, the sensor for detecting the signal of the floating ball is arranged on the main body, and the number of times of the floating ball is sensed by the sensor, so that whether the conditions of less liquid injection and liquid injection leakage exist or not in single liquid injection work is judged, the liquid injection amount in the lithium battery is ensured, and the quality of the lithium battery leaving a factory is ensured; the whole detection work is automatic, operation is simple, and labor is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and more particularly to a device and method for detecting leakage or insufficient injection of lithium batteries. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the processing, storage, and use of lithium metal have very high environmental requirements; with the development of science and technology, lithium batteries have become mainstream.

[0003] When the liquid injection equipment is performing the liquid injection operation on the lithium battery, the electrolyte stored in the container needs to be continuously transported to the liquid injection equipment through the electrolyte delivery pipeline to continuously perform the liquid injection operation of the lithium battery. During the liquid injection process, the liquid injection amount is controlled by the liquid injection pump, and the electrolyte is injected into the lithium battery according to the specifications / capacity of the lithium battery. If bubbles appear in the pipeline or a small section is empty during the liquid injection process, the amount of electrolyte quantitatively delivered to the lithium battery will be insufficient, resulting in leakage or insufficient injection.

[0004] Therefore, there is an urgent need for a detection device and method that can detect leakage and insufficient injection of lithium batteries. Summary of the invention

[0005] In view of this, the present invention provides a device and method for detecting leakage and insufficient injection of a lithium battery.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a leakage and insufficient liquid injection detection device, comprising: a main body, the main body is provided with a liquid inlet and a liquid outlet, and a fluid channel is provided between the liquid inlet and the liquid outlet; a float is provided in the fluid channel, and the float can move back and forth in the fluid channel; the main body is provided with a sensor at the connecting end corresponding to the fluid channel and the liquid inlet.

[0007] As a preferred solution of the present invention, the fluid channel is arranged in a straight line, and the liquid inlet and the liquid outlet are distributed on the same straight line; the float can move to the liquid inlet end and can move to the liquid outlet end.

[0008] As a preferred solution of the present invention, the sensor is a photoelectric sensor or a pressure sensor.

[0009] As a preferred solution of the present invention, the sensor is a pressure sensor, and the pressure sensor is installed in the fluid channel at one end of the liquid inlet.

[0010] As a preferred solution of the present invention, the sensor is a photoelectric sensor; the fluid channel is arranged in a hollow tube body, and the hollow tube body is transparent; the photoelectric sensor is arranged outside the hollow tube body and corresponds to one end of the fluid channel connected to the liquid inlet.

[0011] As a preferred solution of the present invention, the liquid inlet is connected to the liquid outlet of the injection pump; and the liquid outlet is connected to the injection needle nozzle.

[0012] The second aspect of the present invention discloses a method for detecting the amount of liquid injected, which is as follows:

[0013] During the process of the injection pump delivering the fluid to the injection needle nozzle, the fluid flows through the leakage and insufficient injection detection device;

[0014] The float in the leakage and underfill detection device moves in the fluid channel based on the flow of the fluid;

[0015] The sensor senses the sensing signal of the float during a single injection process;

[0016] The controller determines the injection status based on the sensing signal.

[0017] As a preferred solution of the present invention, the sensor senses the sensing signal of the float during a single liquid injection process: the sensor has a detection range, and the presence of the float sensed by the sensor within the detection range is a primary sensing signal; the float enters the detection range for the Nth time after leaving the detection range, which is the Nth sensing signal; each time the sensor senses the float, the sensing signal is transmitted to the controller and recorded.

[0018] As a preferred solution of the present invention, the controller determines the injection status based on the number of sensing signals obtained.

[0019] As a preferred solution of the present invention, the controller determines the injection state based on the number of sensing signals obtained, and the injection state includes: a first injection state, a second injection state and a third injection state; wherein:

[0020] The sensor senses only one sensing signal from the float during a single injection process and determines it as the first injection state;

[0021] The sensor senses two sensing signals from the float during a single injection process and determines it as the second injection state;

[0022] If the sensor senses the float signal more than twice during a single injection process, it is judged as the third injection state.

[0023] As a preferred solution of the present invention, the first liquid injection state indicates that the liquid injection is empty during a single liquid injection process;

[0024] The second injection state indicates that the injection amount is sufficient during a single injection process;

[0025] The third injection state indicates that bubbles exist in the fluid during a single injection process and the injection amount is insufficient.

[0026] It can be seen from the above technical scheme that compared with the prior art, the present invention has the following beneficial technical effects: the present invention arranges a float in the fluid channel and a sensor for detecting the float signal in the main body, and senses the number of times the float is sensed by the sensor, and then determines whether there is insufficient injection or leakage in a single injection operation, thereby ensuring the injection amount in the lithium battery and the quality of the lithium battery leaving the factory; the entire detection work is automated, the operation is simple, and labor is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of the device for detecting leakage and insufficient injection of liquid according to the present invention;

[0029] Figure 2 It is an exploded view of the device for detecting leakage and insufficient injection of the present invention;

[0030] Figure 3 It is a schematic diagram of a main body in the device for detecting leakage and insufficient injection of the present invention;

[0031] Figure 4 It is an exploded view of the main body of the device for detecting leakage and insufficient injection of the present invention;

[0032] Figure 5 It is a cross-sectional schematic diagram of the main body of the device for detecting leakage and insufficient injection of liquid according to the present invention.

[0033] Description of Reference Numerals

[0034] Shell 00; main body 100; liquid inlet 101; liquid outlet 102; fluid channel 103; bracket 110; upper mounting block 111; lower mounting block 112; hollow tube 120; liquid inlet nozzle 130; liquid outlet nozzle 140; float 200; sensor 300. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] A leakage and insufficient injection detection device, please refer to Figure 1-5 As shown, it includes: a main body 100, the main body 100 is provided with a liquid inlet 101 and a liquid outlet 102, a fluid channel 103 is provided between the liquid inlet 101 and the liquid outlet 102, a float 200 is provided in the fluid channel 103, and the float 200 can move back and forth in the fluid channel 103, and a sensor 300 is provided at the connecting end of the main body 100 corresponding to the fluid channel 103 and the liquid inlet 101.

[0037] like Figure 1 As shown, the leakage and insufficient injection detection device is composed of a plurality of main bodies 100, and can simultaneously detect leakage and insufficient injection of a plurality of lithium batteries. Figure 1 The main bodies 100 are arranged in six groups, and the six groups of main bodies 100 are all assembled in a shell 00 and arranged in a straight line. When in use, the six groups of lithium batteries can be simultaneously tested for leakage or insufficient injection.

[0038] Optionally, the number and arrangement of the main bodies 100 may be varied, such as being arranged in two columns, each column having eight groups, or being arranged in three columns, each column having four groups, etc.;

[0039] However, when arranged, the main body 100 is installed vertically, and the flow direction of the fluid is from bottom to top.

[0040] like Figure 3-5 As shown, the main body 100 has a bracket 110, and the bracket 110 is a frame structure, which is mainly used for the installation of various components and plays a supporting role and serves as a carrier;

[0041] like Figure 4 As shown, in the present embodiment, the bracket 110 is a split structure, which facilitates the assembly of other components on the bracket 110; specifically, the bracket 110 includes an upper mounting block 111 and a lower mounting block 112, and a cavity for assembling other components is formed between the upper mounting block 111 and the lower mounting block 112; in other embodiments, the bracket 110 may also be an integrated structure, but compared with the split structure, the difficulty of assembling other components is slightly increased.

[0042] The main body 100 is also provided with a hollow tube body 120, and the fluid channel 103 is shaped inside the hollow tube body 120. A liquid inlet nozzle 130 and a liquid outlet nozzle 140 are correspondingly provided on the upper mounting block 111 and the lower mounting block 112. A liquid inlet 101 is formed in the liquid inlet nozzle 130 and is connected to the fluid channel 103. A liquid outlet 102 is formed in the liquid outlet nozzle 140 and is connected to the fluid channel 103.

[0043] During assembly, sealing rings may be provided between the liquid inlet nozzle 130 and the hollow tube body 120 , and between the liquid outlet nozzle 140 and the hollow tube body 120 , respectively, to prevent leakage of the liquid.

[0044] like Figure 5 As shown, the fluid channel 103 is arranged in a straight line, and the liquid inlet 101 and the liquid outlet 102 are distributed on the same straight line, and the float 200 can move to the liquid inlet 101 end and can move to the liquid outlet 102 end.

[0045] In other embodiments, of course, the fluid channel 103 may also be arranged as an inclined straight line;

[0046] Alternatively, in other embodiments, the fluid channel 103 is curved, but the fluid channel 103 has at least one straight channel, and the float can move back and forth in the straight channel. At the same time, the sensor 300 corresponds to the lower end of the straight channel to sense the movement of the float.

[0047] In one embodiment, the sensor 300 is a photoelectric sensor or a pressure sensor;

[0048] Optionally, the sensor 300 is a pressure sensor, which is installed in the fluid channel 103 at one end of the liquid inlet 101;

[0049] The pressure sensor may be a common pressure sensor in the prior art. When the pressure of the float acts on the pressure sensor, the pressure sensor senses the float and then sends a signal to the controller.

[0050] In one embodiment, the sensor 300 is a photoelectric sensor; the fluid channel 103 is disposed in a hollow tube body, and the hollow tube body 120 is transparent; the photoelectric sensor is disposed outside the hollow tube body and corresponds to one end where the fluid channel 103 is connected to the liquid inlet 101.

[0051] like Figure 5 As shown, the hollow tube body 120 is transparent, the sensor 300 is assembled in the main body 100 and corresponds to the lower end of the hollow tube body 120, the sensor 300 is communicated with the controller (not shown in the figure), when the fluid pushes the float to rise, the float 200 leaves the detection range of the sensor 300, when the float 200 falls again and enters the detection range of the sensor 300, the sensor 300 sends a signal to the controller.

[0052] Furthermore, the sensor 300 is an infrared sensor among photoelectric sensors, and through the cooperation of the receiving end and the transmitting end of the infrared sensor, it senses whether the float 200 is within the detection range.

[0053] For example, the transmitting end and the receiving end of the infrared sensor can be set on the same side. When the float 200 is within the detection range, the light will be reflected by the float to the receiving end. After the receiving end senses the reflected light, it transmits the signal to the controller to determine that the float 200 is within the detection range.

[0054] For another example, the transmitting end and the receiving end of the infrared sensor are on opposite sides. When the float 200 is within the detection range, the light will be blocked by the float, and the receiving end cannot receive the light. The receiving end transmits the signal to the controller to determine that the float 200 is within the detection range.

[0055] Furthermore, the controller can be a commonly used touch control screen with a circuit board installed therein. The circuit board is pre-burned with a corresponding program to sense whether the float is within the detection range through the sensor 300, or whether the float enters and leaves the detection range multiple times within a unit transmission time, and then determine whether the lithium battery is leaking or underfilled.

[0056] In one embodiment, the liquid inlet 101 is connected to the liquid outlet of the liquid injection pump; the liquid outlet 102 is connected to the liquid injection needle nozzle;

[0057] The injection pump can be purchased from a common injection pump on the market, which can transfer fluid (electrolyte) to the lithium battery in a timely / quantitative manner. The injection needle connects the liquid outlet 102 and the liquid inlet between the lithium battery.

[0058] The method for detecting the amount of liquid injected is as follows:

[0059] During the process of the injection pump delivering the fluid to the injection needle nozzle, the fluid flows through the leakage and insufficient injection detection device;

[0060] The float in the leakage and underfill detection device moves in the fluid channel based on the flow of the fluid;

[0061] The sensor senses the sensing signal of the float during a single injection process;

[0062] The controller determines the injection status based on the sensing signal.

[0063] Specifically, the injection pump is connected between the electrolyte storage tank and the leaking injection device. When injecting electrolyte into the lithium battery, the controller inputs a timed and quantitative fluid transfer according to the capacity of the lithium battery.

[0064] The sensor senses the sensing signal of the float during a single liquid injection process: the sensor has a detection range, and the presence of the float sensed by the sensor within the detection range is a primary sensing signal; the float enters the detection range for the Nth time after leaving the detection range, which is the Nth sensing signal; each time the sensor senses the float, the sensing signal is transmitted to the controller and recorded.

[0065] The controller determines the injection state based on the number of sensing signals obtained.

[0066] Furthermore, the controller determines the liquid injection state based on the number of sensing signals obtained, and the liquid injection state includes: a first liquid injection state, a second liquid injection state and a third liquid injection state; wherein:

[0067] If the sensor senses only one sensing signal from the float during a single injection process, it is judged as the first injection state; if the sensor senses two sensing signals from the float during a single injection process, it is judged as the second injection state; if the sensor senses more than two sensing signals from the float during a single injection process, it is judged as the third injection state.

[0068] The first injection state indicates that there is no injection during a single injection process; the second injection state indicates that the injection amount is sufficient during a single injection process; the third injection state indicates that bubbles exist in the fluid during a single injection process and the injection amount is insufficient.

[0069] Figure 1 There are six groups of main bodies 100, which can simultaneously perform leakage and insufficient injection detection on the six groups of lithium batteries. Each group of main bodies 100 is connected to an injection pump and an injection needle nozzle, and the controller can perform leakage and insufficient injection detection on the six groups of lithium batteries separately;

[0070] The following uses the leakage and insufficient injection detection of any group of lithium batteries as an example to specifically explain the detection methods of leakage and insufficient injection:

[0071] S100: Set the single injection volume of the injection pump according to the model and capacity of the lithium battery;

[0072] Here, the single injection volume of the injection pump can be calculated based on the model or flow rate of the injection pump, and the single operation time of the injection pump can be calculated, and then the single injection volume can be confirmed;

[0073] S200: The fluid enters the fluid channel 103, and the float 200 moves in the fluid channel 103 based on the push of the fluid;

[0074] S300: The sensor senses the sensing signal of the float during a single injection process;

[0075] S301: When the injection pump is in operation, the liquid discharged from the liquid inlet pushes the float 200 to move, and the float 200 rises and leaves the detection range of the sensor 300; when the injection pump completes a single injection action, the float 200 will fall back to the detection range of the sensor 300, and two corresponding sensing signals will appear in the detection range of the sensor 300; the sensor 300 transmits the two sensing signals to the controller, and jumps to step S401;

[0076] S302: When the injection pump is activated, the liquid discharged from the liquid inlet pushes the float 200 to move, and the float 200 rises and leaves the detection range of the sensor 300; when there are bubbles in the fluid channel 103, the injection pump will cause the bubbles or air to push the float 200 to move, and the float 200 will jump up and down when pushing it, and enter the detection range many times; when the injection pump completes a single injection action, the float 200 will fall back to the detection range of the sensor 300, and during this process, the sensor B will have multiple sensing signals (more than 2 sensing signals); the sensor 300 transmits the two sensing signals to the controller, and jumps to step S402;

[0077] S303: When the injection pump is activated, the liquid discharged from the liquid inlet pushes the float 200 to move, and the float 200 rises and leaves the detection range of the sensor 300; there is no liquid at all or one section of the fluid channel 103, and when the injection pump is activated, the float 200 is pushed to the top, and after the injection pump is completed, both ends of the float 200 are air to form a pressure balance, and the float 200 will be sucked to the top (i.e., the liquid outlet 102), and the sensor 300 will only have a single sensing signal of the float 200; the sensor 300 transmits the two sensing signals to the controller, and jumps to step S403;

[0078] S400: the controller determines the injection state based on the number of sensing signals obtained;

[0079] S401: After the liquid injection pump performs a single liquid injection action, the controller receives two sensing signals from the sensor sensing the float during the single liquid injection process, and determines that it is a second liquid injection state, indicating that the liquid injection amount during the single liquid injection process is sufficient;

[0080] S402: After the liquid injection pump performs a single liquid injection action, the controller receives the sensing signal of the float ball sensed by the sensor more than twice during the single liquid injection process, and determines that it is the third liquid injection state, indicating that there are bubbles in the fluid during the single liquid injection process, and the liquid injection amount is insufficient, that is, insufficient liquid injection;

[0081] S403: After the liquid injection pump performs a single liquid injection action, the controller receives a sensing signal from the sensor to the float during the single liquid injection process, and determines it as the first liquid injection state, indicating that the single liquid injection process is empty injection and leakage.

[0082] Through the above method, it is possible to determine whether a single group of lithium batteries has leaked or underfilled liquid, and the judgment effect is accurate;

[0083] The display program can be set on the controller. When leakage or insufficient injection occurs, the corresponding reminder interface will be entered or a corresponding reminder mark will be displayed. Of course, the controller can also be set with light, sound and other warning methods to remind the user which specific group of lithium batteries has leakage or insufficient injection, thereby improving the factory qualification rate of lithium batteries.

[0084] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leakage and insufficient injection detection device, characterized in that: include: The main body (100) is provided with a liquid inlet (101) and a liquid outlet (102), and a fluid channel (103) is provided between the liquid inlet (101) and the liquid outlet (102); a float (200) is provided in the fluid channel (103), and the float (200) can reciprocate in the fluid channel (103); and a sensor (300) is provided at the connecting end of the main body (100) corresponding to the fluid channel (103) and the liquid inlet (101).

2. A leakage and insufficient injection detection device according to claim 1, characterized in that: The fluid channel (103) is arranged in a straight line, and the liquid inlet (101) and the liquid outlet (102) are distributed on the same straight line; the float (200) can move to the liquid inlet (101) end and can move to the liquid outlet (102) end.

3. The device for detecting leakage or insufficient injection of liquid according to claim 1, characterized in that: The sensor (300) is a photoelectric sensor or a pressure sensor.

4. A leakage and insufficient injection detection device according to claim 3, characterized in that: The sensor (300) is a pressure sensor, which is installed in the fluid channel (103) at one end of the liquid inlet (101).

5. The device for detecting leakage or insufficient injection of liquid according to claim 3, characterized in that: The sensor (300) is a photoelectric sensor; the fluid channel (103) is arranged in a hollow tube body, and the hollow tube body is transparent; the photoelectric sensor is arranged outside the hollow tube body and corresponds to the end of the fluid channel (103) connected to the liquid inlet (101).

6. A leakage and insufficient injection detection device according to any one of claims 1 to 5, characterized in that: The liquid inlet (101) is connected to the liquid outlet of the liquid injection pump; and the liquid outlet (102) is connected to the liquid injection needle nozzle.

7. A method for detecting leaked or insufficient injection, characterized in that: Here’s how: During the process of the injection pump delivering the fluid to the injection needle nozzle, the fluid flows through the leakage and insufficient injection detection device; The float in the leakage and underfill detection device moves in the fluid channel based on the flow of the fluid; The sensor senses the sensing signal of the float during a single injection process; The controller determines the injection status based on the sensing signal.

8. The method for detecting leakage or insufficient injection of liquid according to claim 7, characterized in that: The sensor senses the sensing signal of the float during a single liquid injection process: the sensor has a detection range, and the presence of the float sensed by the sensor within the detection range is a primary sensing signal; the float enters the detection range for the Nth time after leaving the detection range, which is the Nth sensing signal; each time the sensor senses the float, the sensing signal is transmitted to the controller and recorded.

9. The method for detecting leakage or insufficient injection of liquid according to claim 7 or 8, characterized in that: The controller determines the injection state based on the number of sensing signals obtained.

10. The method for detecting leakage or insufficient injection of liquid according to claim 9, characterized in that: The controller determines the liquid injection state based on the number of sensing signals obtained, and the liquid injection state includes: a first liquid injection state, a second liquid injection state and a third liquid injection state; wherein: The sensor senses only one sensing signal from the float during a single injection process and determines it as the first injection state; The sensor senses two sensing signals from the float during a single injection process and determines it as the second injection state; If the sensor senses the float signal more than twice during a single injection process, it is judged as the third injection state.

11. The method for detecting leakage or insufficient injection of liquid according to claim 10, characterized in that: The first injection state indicates that the injection is empty during a single injection process; The second injection state indicates that the injection amount is sufficient during a single injection process; The third injection state indicates that bubbles exist in the fluid during a single injection process and the injection amount is insufficient.

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