Liquid injection system and battery cell production equipment

Abstract

The utility model discloses a liquid injection system and battery cell production equipment. The liquid injection system comprises a liquid injection power unit and a liquid injection control unit, the plurality of distributors are connected with the liquid injection power unit; and the plurality of liquid injectors are connected with the plurality of distributors in a one-to-one correspondence manner. Therefore, according to the liquid injection system, the situation that each liquid injection channel is provided with a liquid injection pump to provide pressure can be avoided, and the situation that the liquid injection amount of each liquid injection channel is completely metered by the liquid injection pump can also be avoided, so that the dependence of each liquid injection channel on the metering function of the liquid injection pump can be reduced, the number of the liquid injection pumps can also be reduced, and the equipment cost can also be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery cell technology, and in particular to a liquid injection system and battery cell production equipment. Background Technology

[0002] In existing technologies, each injection unit in an injection system is equipped with a pressure source, and each channel shares the pressure with it. The distance from the pressure source and the structure and assembly of the pipeline components cannot be guaranteed to be completely consistent, leading to varying actual friction losses in each channel. Furthermore, as the number of channels increases, the associated pipeline components and usage risks also increase, making pipeline control more complex, resulting in decreased injection efficiency and utilization, and also increasing costs.

[0003] Moreover, the metering of the injection volume is entirely the responsibility of the injection pump. Each channel must be metered by the injection pump. The more channels there are, the greater the impact on the metering of a single pump will be, which will increase the number of pumps to meet the metering requirements. Since the cost of a single injection pump is high, increasing the number of pumps will lead to a significant increase in cost. It will also make the pipeline system more complex, which is not conducive to maintenance and will also increase costs. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a liquid injection system that avoids the need to install a liquid injection pump to provide pressure in each liquid injection channel, and also avoids the need for the liquid volume measurement in each liquid injection channel to be entirely determined by the liquid injection pump. This reduces the dependence of each liquid injection channel on the metering function of the liquid injection pump, reduces the number of liquid injection pumps, and also reduces equipment costs.

[0005] This utility model further proposes a battery cell production equipment.

[0006] The liquid injection system according to a first aspect of the present invention includes: a liquid injection power unit; a plurality of distributors, each of which is connected to the liquid injection power unit; and a plurality of injectors, each of which is connected to one of the plurality of distributors in a corresponding manner.

[0007] Therefore, this injection system can avoid setting up an injection pump to provide pressure in each injection channel, and it can also avoid the injection volume of each injection channel being measured entirely by the injection pump. This reduces the dependence of each injection channel on the injection pump's metering function, reduces the number of injection pumps, and also reduces equipment costs.

[0008] According to some embodiments of the present invention, the dispenser has a first liquid level detector, which is used to detect whether the liquid volume in the dispenser has increased to a first preset liquid level; the liquid injection system further includes a controller, which is electrically connected to the first liquid level detector and the liquid injection power unit respectively.

[0009] According to some embodiments of the present invention, the liquid injection system further includes: a liquid storage tank, the outlet of which is connected to the liquid injection power unit; and a pressure relief control valve, which is connected to the return port and the outlet of the liquid injection power unit respectively, and is electrically connected to the controller.

[0010] According to some embodiments of the present invention, the dispenser has a second liquid level detector, which is used to detect whether the liquid level in the dispenser has decreased to a second preset liquid level, wherein the first preset liquid level is higher than the second preset liquid level; the liquid injection system further includes a circulation indicator, which is used for counting the liquid injection, and the circulation indicator is electrically connected to the second liquid level detector and the controller respectively.

[0011] According to some embodiments of the present invention, the injection system further includes a reflux tank, which is connected to the reflux port of the injection power unit and the end of the pressure relief control valve away from the injection power unit.

[0012] According to some embodiments of this utility model, the injection power unit is a hydraulic pump; and / or the pressure relief control valve is a solenoid valve.

[0013] According to some embodiments of this utility model, the dispenser is a quantitative dispenser.

[0014] According to some embodiments of the present invention, the dispenser includes: a housing, in which a dispensing cavity is formed, the dispensing cavity being connected to the corresponding injection power unit and the corresponding injector respectively; and a piston mechanism, which is movably disposed in the dispensing cavity, the piston mechanism including an indicator rod for indicating the status.

[0015] According to some embodiments of the present invention, the injection system further includes: a main pipeline, one end of which is connected to the outlet of the injection power unit; and multiple branch pipelines, one end of which is connected to the other end of the main pipeline, and the other end of which is connected to the multiple distributors one by one.

[0016] According to a second aspect of the present invention, a battery cell production apparatus includes the above-described liquid injection system.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the injection system according to an embodiment of the present invention;

[0020] Figure 2 This is a flowchart illustrating the operation of the liquid injection system according to an embodiment of the present invention.

[0021] Figure label:

[0022] 100. Injection system;

[0023] 10. Fluid injection power unit;

[0024] 20. Dispenser; 30. Injector;

[0025] 40. Liquid storage tank; 50. Pressure relief control valve;

[0026] 60. Circulation indicator; 70. Reflux tank;

[0027] 80. Main pipeline; 90. Branch pipeline. Detailed Implementation

[0028] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0029] The following is for reference. Figure 1 and Figure 2 Description of an injection system 100 according to an embodiment of the present invention.

[0030] Reference Figure 1 As shown, the liquid injection system 100 of the first aspect embodiment of the present invention includes: a liquid injection power unit 10, a plurality of distributors 20 and a plurality of liquid injectors 30, wherein the plurality of distributors 20 are all connected to the liquid injection power unit 10, and the plurality of liquid injectors 30 are connected to the plurality of distributors 20 in a one-to-one correspondence.

[0031] Specifically, the electrolyte injection system 100 mainly consists of an electrolyte injection power unit 10, multiple distributors 20, and multiple injectors 30. Since the multiple distributors 20 are all connected to the electrolyte injection power unit 10, the electrolyte injection power unit 10 can provide power to the electrolyte flowing to the multiple distributors 20. When the electrolyte injection power unit 10 is working, it can increase the pipeline pressure between the electrolyte injection power unit 10 and the multiple distributors 20. The electrolyte injection power unit 10 only needs to provide pressure and does not require its accuracy. That is to say, there is no need to consider the pressure loss of the pipeline flowing to the distributors 20. The pressure loss does not affect the distributors 20 from delivering a certain amount of electrolyte to the battery cell.

[0032] Furthermore, the arrangement of multiple distributors 20 can form multiple injection channels, each of which can quantitatively inject electrolyte into the battery cell through a distributor 20. This allows the injection power unit 10 and the flow distribution module composed of multiple distributors 20 to be set up separately. This avoids the need to set up an injection pump to provide pressure for each injection channel, and also avoids the injection pump being solely responsible for measuring the injection volume of each injection channel.

[0033] Furthermore, since the distributor 20 can quantitatively inject electrolyte into the battery cells, the electrolyte injection power unit 10 only needs to provide pressure. This reduces the reliance on the metering function of the injection pump for each injection channel, reduces the number of injection pumps, and lowers equipment costs. The reduction in the number of injection pumps simplifies the piping design and related components of the electrolyte injection system 100, reduces energy consumption during delivery, and reduces potential points of failure, thereby improving the stability of the electrolyte injection system 100.

[0034] Furthermore, multiple injectors 30 are connected one-to-one with multiple distributors 20. The injectors 30 can accurately deliver the electrolyte from the distributors 20 to the battery cells, thereby improving the efficiency of injecting electrolyte into the battery cells.

[0035] Therefore, the injection system 100 can avoid the need to set up an injection pump to provide pressure in each injection channel, and can also avoid the need for the injection volume of each injection channel to be measured entirely by the injection pump. This can reduce the dependence of each injection channel on the metering function of the injection pump, reduce the number of injection pumps, and reduce equipment costs.

[0036] According to some embodiments of the present invention, the distributor 20 has a first liquid level detector, which is used to detect whether the liquid level in the distributor 20 has increased to a first preset liquid level. The liquid injection system 100 also includes a controller, which is electrically connected to the first liquid level detector and the liquid injection power unit 10 respectively.

[0037] The first liquid level detector can detect whether the electrolyte delivered by the injection power unit 10 to the distributor 20 has reached the first preset liquid level. If the first preset liquid level has not been reached, the distributor 20 remains in the state of storing electrolyte. When the electrolyte delivered by the injection power unit 10 to the distributor 20 reaches the first preset liquid level, the pipeline pressure between the injection power unit 10 and the distributor 20 reaches its maximum value. Furthermore, the controller is electrically connected to both the first liquid level detector and the injection power unit 10. When the first liquid level detector detects that the electrolyte has reached the first preset liquid level, it transmits a signal to the controller, which then controls the injection power unit 10 to stop operating, thereby ensuring that the distributor 20 can store the preset amount of electrolyte.

[0038] According to some embodiments of this utility model, such as Figure 1 As shown, the liquid injection system 100 also includes a liquid storage tank 40 and a pressure relief control valve 50. The outlet of the liquid storage tank 40 is connected to the liquid injection power unit 10, and the pressure relief control valve 50 is connected to the return port and the outlet of the liquid injection power unit 10, respectively. The pressure relief control valve 50 is electrically connected to the controller.

[0039] The outlet of the storage tank 40 is connected to the liquid injection power unit 10, which can deliver the electrolyte from the storage tank 40 to multiple distributors 20.

[0040] Furthermore, the pressure relief control valve 50 is connected to both the return port and the outlet port of the injection power unit 10. When the injection power unit 10 stops working, the electrolyte flowing out of the outlet port of the injection power unit 10 can flow to the pressure relief control valve 50. Further, the electrolyte in the injection power unit 10 can flow to the pressure relief control valve 50 through the return port.

[0041] Furthermore, the pressure relief control valve 50 is electrically connected to the controller. When the first liquid level detector detects that the electrolyte in the distributor 20 has reached the first preset liquid level, the first liquid level detector can transmit a signal to the controller. The controller can control the pressure relief control valve 50 to open, which can reduce the pressure in the pipeline between the injection power unit 10 and the distributor 20. At this time, the compressed spring in the distributor 20 needs to be reset, and the electrolyte in the distributor 20 that has reached the first preset liquid level is pushed out and flows to the battery cell, thereby realizing the quantitative injection of electrolyte into the battery cell.

[0042] According to some embodiments of the present invention, the dispenser 20 has a second liquid level detector, which is used to detect whether the liquid level in the dispenser 20 has decreased to a second preset liquid level. The first preset liquid level is higher than the second preset liquid level. The liquid injection system 100 also includes a circulation indicator 60, which is used for counting the liquid injection. The circulation indicator 60 is electrically connected to the second liquid level detector and the controller respectively.

[0043] The second liquid level detector can detect whether the electrolyte delivered by the distributor 20 to the battery cell has decreased to the second preset liquid level. If the second preset liquid level has not been reached, the distributor 20 will continue to deliver electrolyte to the battery cell. When the electrolyte delivered by the distributor 20 to the battery cell decreases to the second preset liquid level, the pipeline pressure between the liquid injection power unit 10 and the distributor 20 drops to the minimum value.

[0044] Furthermore, the circulation indicator 60 is electrically connected to the second liquid level detector and the controller respectively. When the second liquid level detector detects that the electrolyte level has decreased to the second preset level, the second liquid level detector can transmit a signal to the circulation indicator 60, and the circulation indicator 60 can complete one cycle of liquid injection counting.

[0045] Furthermore, the cycle indicator 60 is electrically connected to the controller. When the cycle indicator 60 completes counting, it can send a signal to the controller to trigger the next operation or a series of predetermined actions. For example, after a batch of battery cells has been injected with electrolyte, the system needs to prepare the next batch of battery cells for electrolyte injection, thereby improving the efficiency of the distributor 20 in delivering electrolyte to the battery cells.

[0046] According to some embodiments of this utility model, such as Figure 1 As shown, the injection system 100 also includes a return tank 70, which is connected to the return port of the injection power unit 10 and the end of the pressure relief control valve 50 away from the injection power unit 10.

[0047] The reflux tank 70 allows the electrolyte flowing back from the injection power unit 10 to the reflux tank 70, and also allows the electrolyte flowing into the pressure relief control valve 50 to the reflux tank 70. In this way, the reflux tank 70 can realize the recovery of electrolyte. Then, the electrolyte in the reflux tank 70 can flow back to the storage tank, which makes it easier to inject electrolyte into the cell next time.

[0048] According to some embodiments of this utility model, the injection power unit 10 is a hydraulic pump, and / or the pressure relief control valve 50 is a solenoid valve.

[0049] The hydraulic pump can regulate the pressure of the delivered electrolyte, thus meeting the needs of multiple injection channels. The solenoid valve can open or close in a very short time, typically with a short response time, enabling rapid opening and closing.

[0050] According to some embodiments of the present invention, the dispenser 20 is a quantitative dispenser.

[0051] The metering dispenser 20 has the advantage of a fixed flow rate, which is not affected by the metering time and has good stability. The metering dispenser 20 can provide high measurement accuracy, ensuring that the amount of electrolyte dispensed each time is accurate. For example, the metering dispenser 20 can be configured as a progressive metering dispenser.

[0052] According to some embodiments of the present invention, the dispenser 20 includes a housing and a piston mechanism. A dispensing cavity is formed inside the housing. The dispensing cavity is connected to a corresponding injection power unit 10 and a corresponding injector 30, respectively. The piston mechanism is movably disposed in the dispensing cavity. The piston mechanism includes an indicator rod for indicating the status.

[0053] The distribution chamber is connected to the corresponding liquid injection power unit 10 and the corresponding liquid injector 30, so that the liquid injection power unit 10 can deliver the electrolyte from the storage tank 40 to the distribution chamber. When the compressed spring returns to its original position, the electrolyte in the distribution chamber can flow to the battery cell under the push of the piston mechanism.

[0054] Furthermore, the piston mechanism includes an indicator rod for indicating the status. For example, the indicator rod can be connected to the piston mechanism and can move with it. When the injection system 100 is pressurized, the electrolyte is pre-stored in the distributor 20. When the injection system 100 is depressurized, due to the spring force, the electrolyte in the distributor 20 is ejected from the injector 30, and the indicator rod moves accordingly, indicating that this process has occurred. In this way, it can be confirmed that the electrolyte has been correctly injected into the cell, which has the advantage of visualization.

[0055] According to some embodiments of this utility model, such as Figure 1 As shown, the injection system 100 also includes a main pipeline 80 and multiple branch pipelines 90. One end of the main pipeline 80 is connected to the outlet of the injection power unit 10, one end of each of the multiple branch pipelines 90 is connected to the other end of the main pipeline 80, and the other end of each of the multiple branch pipelines 90 is connected to a multiple distributor 20 in a corresponding manner.

[0056] One end of the main pipeline 80 is connected to the outlet of the liquid injection power unit 10. In this way, the electrolyte in the storage tank 40 can be delivered to multiple branch pipelines 90 through only one liquid injection power unit 10. Since the other ends of the multiple branch pipelines 90 are connected to multiple distributors 20 one by one, each branch pipeline 90 is equipped with a distributor 20. This allows multiple branch pipelines 90 to inject electrolyte into the battery cell in a quantitative manner, thereby improving the electrolyte injection efficiency of the liquid injection system 100.

[0057] According to a second aspect of the present invention, the battery cell production equipment includes: the liquid injection system 100 described in the above embodiment.

[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A liquid injection system, characterized in that, include: Injection power unit (10); Multiple dispensers (20), each of which is connected to the injection power unit (10); Multiple injectors (30) are connected one-to-one with multiple dispensers (20).

2. The injection system according to claim 1, characterized in that, The dispenser (20) has a first liquid level detector, which is used to detect whether the liquid level in the dispenser (20) has increased to a first preset liquid level; The injection system also includes: The controller is electrically connected to the first liquid level detector and the liquid injection power unit (10).

3. The injection system according to claim 2, characterized in that, Also includes: A liquid storage tank (40) is provided, the outlet of which is connected to the liquid injection power unit (10). The pressure relief control valve (50) is connected to the return port and the outlet port of the injection power unit (10) respectively, and is electrically connected to the controller.

4. The injection system according to claim 3, characterized in that, The dispenser (20) has a second liquid level detector, which is used to detect whether the liquid level in the dispenser (20) has decreased to a second preset liquid level, wherein the first preset liquid level is higher than the second preset liquid level. The injection system also includes: A circulation indicator (60) is used for counting the liquid injection, and the circulation indicator (60) is electrically connected to the second liquid level detector and the controller respectively.

5. The injection system according to claim 3, characterized in that, Also includes: The return tank (70) is connected to the return port of the injection power unit (10) and the end of the pressure relief control valve (50) away from the injection power unit (10).

6. The injection system according to claim 3, characterized in that, The injection power unit (10) is a hydraulic pump; and / or The pressure relief control valve (50) is a solenoid valve.

7. The injection system according to claim 1, characterized in that, The dispenser (20) is a quantitative dispenser.

8. The injection system according to claim 1, characterized in that, The distributor (20) includes: The housing has a distribution cavity formed inside it, and the distribution cavity is connected to the corresponding injection power unit (10) and the corresponding injection device (30) respectively; A piston mechanism movably disposed in the dispensing chamber, the piston mechanism including an indicator rod for indicating a state.

9. The injection system according to claim 1, characterized in that, Also includes: Main pipeline (80), one end of which is connected to the outlet of the liquid injection power unit (10); Multiple branch pipes (90), one end of each of the multiple branch pipes (90) is connected to the other end of the main pipe (80), and the other end of each of the multiple branch pipes (90) is connected to each of the multiple distributors (20) in a corresponding manner.

10. A battery cell manufacturing equipment, characterized in that, include: The injection system according to any one of claims 1-9.

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