Battery liquid injection device

Abstract

The utility model discloses a battery liquid injection device, which relates to the technical field of battery liquid injection and comprises a liquid injection container, a liquid injection cavity, a liquid injection pipe and a liquid injection pipe, the fixed seat is arranged in the liquid injection cavity, and the fixed seat is provided with a plurality of mounting positions for bearing battery cells; the liquid injection assembly is used for injecting liquid into the battery cell placed at the mounting position; and the multiple ultrasonic wave generation modules are arranged in the liquid injection cavity, and each ultrasonic wave generation module corresponds to at least one installation position. Therefore, the plurality of ultrasonic generation modules are arranged, and each ultrasonic generation module is arranged corresponding to at least one mounting position, so that ultrasonic waves can be generated to the battery cell through the ultrasonic generation modules, the generated ultrasonic waves can quickly decompose bubbles adhered to the pole piece, and the electrolyte infiltration efficiency is improved; and the emitted ultrasonic waves can enable the electrolyte and the pole piece to resonate, so that the electrolyte infiltration efficiency is further improved, the electrolyte injection efficiency can be improved, and the production efficiency of the battery can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery liquid injection technical field especially is related to a battery liquid injection device. BACKGROUND

[0002] In the battery production process, electrolyte needs to be injected into the battery cell, however, in the related technology, the electrolyte infiltration efficiency is slow, which leads to poor liquid injection efficiency and seriously affects the production efficiency of the battery. SUMMARY

[0003] The utility model discloses at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery liquid injection device, which can improve the electrolyte infiltration efficiency and thus improve the liquid injection efficiency and the production efficiency of the battery.

[0004] The battery liquid injection device according to the utility model comprises: a liquid injection container defining a liquid injection cavity; a fixing seat provided in the liquid injection cavity, the fixing seat having a plurality of mounting positions for carrying battery cells; a liquid injection assembly for injecting liquid into the battery cells placed in the mounting positions; and a plurality of ultrasonic wave generating modules provided in the liquid injection cavity, each of the ultrasonic wave generating modules being arranged corresponding to at least one of the mounting positions.

[0005] The battery liquid injection device according to the utility model can generate ultrasonic waves to the battery cells through the ultrasonic wave generating modules, the emitted ultrasonic waves can quickly decompose the bubbles adhered to the pole pieces, improve the electrolyte infiltration efficiency, and the emitted ultrasonic waves can make the electrolyte and the pole pieces resonate, further improve the electrolyte infiltration efficiency, thus improve the liquid injection efficiency and the production efficiency of the battery.

[0006] In some examples of the utility model, the fixing seat divides the liquid injection cavity into a first sub-cavity and a second sub-cavity, the mounting positions are configured as mounting grooves and open towards the first sub-cavity, and the plurality of ultrasonic wave generating modules are provided in the second sub-cavity.

[0007] In some examples of the utility model, the ultrasonic wave generating modules have output ends, and the output ends of the plurality of ultrasonic wave generating modules are attached to one end of the fixing seat towards the second sub-cavity.

[0008] In some examples of the utility model, the number of the ultrasonic wave generating modules is the same as and one-to-one corresponding to the number of the mounting positions.

[0009] In some examples of the utility model, the liquid injection assembly comprises: a first liquid storage container, a pump and a plurality of liquid injection branches, the pump is connected with the first liquid storage container and the plurality of liquid injection branches, and the pump is used to deliver liquid in the first liquid storage container to the plurality of liquid injection branches; the liquid injection branch comprises: a second liquid storage container, a first control valve and a liquid injection element connected in sequence, the liquid injection element is located downstream of the first control valve, and the plurality of liquid injection elements correspond to the plurality of mounting positions one by one to inject liquid into the battery cell.

[0010] In some examples of the utility model, the liquid injection branch further comprises: a third liquid storage container, which is connected between the first control valve and the liquid injection element.

[0011] In some examples of the utility model, the liquid injection assembly further comprises: a defoaming container, a first liquid inlet pipe, a first vacuum pipe, a first normal-pressure pipe, a second liquid inlet pipe, the first liquid inlet pipe, the first vacuum pipe and the first normal-pressure pipe are connected with the defoaming container, the second liquid inlet pipe is connected between the defoaming container and the first liquid storage container, a plurality of second control valves are arranged on the first liquid inlet pipe, the first vacuum pipe, the first normal-pressure pipe and the second liquid inlet pipe.

[0012] In some examples of the utility model, the liquid injection assembly further comprises: a second normal-pressure pipe and an inert gas communication pipe, the second normal-pressure pipe and the inert gas communication pipe are connected with the first liquid storage container, and the first liquid storage container is arranged at a height lower than the defoaming container; a plurality of third control valves are arranged on the inert gas communication pipe and the second normal-pressure pipe.

[0013] In some examples of the utility model, the liquid injection assembly further comprises: a second vacuum pipe and a third control valve, the second vacuum pipe is connected with the first liquid storage container, and the third control valve is arranged on the second vacuum pipe.

[0014] In some examples of the utility model, the battery liquid injection device further comprises: a collecting container, a first liquid outlet pipe and a second liquid outlet pipe, the first liquid outlet pipe is connected between the defoaming container and the collecting container, the second liquid outlet pipe is connected between the first liquid storage container and the collecting container, and a plurality of fourth control valves are arranged on the first liquid outlet pipe and the second liquid outlet pipe.

[0015] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings, of which:

[0017] Figure 1 is a schematic view of the liquid injection container according to an embodiment of the present utility model;

[0018] Figure 2 is a partial flow path schematic view of the liquid injection assembly according to an embodiment of the present utility model;

[0019] Figure 3 is a schematic view of the liquid injection branch according to an embodiment of the present utility model.

[0020] Reference signs:

[0021] Battery cell 99;

[0022] Liquid injection container 10; upper shell 11; lower shell 12; first sub-cavity 13; second sub-cavity 14; liquid injection cavity 15;

[0023] Fixing seat 20; mounting position 21;

[0024] Ultrasonic wave generating module 30;

[0025] Liquid injection assembly 40; first liquid storage container 41; pump 42;

[0026] Liquid injection branch 43; second liquid storage container 431; liquid injection piece 432; defoaming container 433; first liquid inlet pipe 434; first vacuum pipe 435; first normal pressure pipe 436; second liquid inlet pipe 437; second normal pressure pipe 438; inert gas communication pipe 439; second vacuum pipe 440; collection container 441; first liquid outlet pipe 442; second liquid outlet pipe 443; third liquid storage container 444;

[0027] First control valve 51; second control valve 52; third control valve 53; fourth control valve 54; manual liquid discharge valve 55; fifth control valve 56; wire 57. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as limiting the present utility model.

[0029] The battery liquid injection device according to the embodiments of the present utility model will be described below with reference to Figures 1-3

[0030] As Figures 1-3 ​As shown, the battery liquid injection device according to the embodiment of the utility model includes: a liquid injection container 10, a fixing seat 20, a liquid injection assembly 40 and an ultrasonic wave generating module 30.

[0031] The liquid injection container 10 defines a liquid injection cavity 15; the fixing seat 20 is arranged in the liquid injection cavity 15, and the fixing seat 20 has a plurality of mounting positions 21 for bearing the battery core 99; the liquid injection assembly 40 is used for injecting liquid into the battery core 99 placed in the mounting position 21; and the ultrasonic wave generating module 30 is a plurality of modules and is arranged in the liquid injection cavity 15, and each ultrasonic wave generating module 30 is arranged in correspondence with at least one mounting position 21.

[0032] As some embodiments of the present application, the liquid injection container 10 can include an upper shell 11 and a lower shell 12, and the upper shell 11 and the lower shell 12 are detachably connected; as some embodiments of the present application, the battery liquid injection device further includes a sealing member, and the sealing member can be sealed between the upper shell 11 and the lower shell 12; as some embodiments of the present application, the lower shell 12 has a groove, and the sealing member is partially arranged in the groove, so as to reduce the probability of movement of the sealing member and improve the sealing performance of the sealing member. It should be noted that the liquid injection cavity 15 needs to be subjected to vacuumizing work before liquid injection, and the vacuum negative pressure thereof can reach-95KPA; by making the battery liquid injection device further include a sealing member, the sealing performance of the liquid injection container 10 can be improved, and the use reliability of the battery liquid injection device can be improved.

[0033] The fixing seat 20 has the mounting position 21, and the mounting position 21 can bear the battery core 99, that is, the battery core 99 can be placed in the mounting position 21; the number of the mounting position 21 can be a plurality, and the number of the mounting position 21 can be, but is not limited to, four, six, eight and the like; and each mounting position 21 can be used for bearing the battery core 99. As some embodiments of the present application, the battery liquid injection device further includes a clamping plate and an air cylinder, and the clamping plate and the air cylinder are arranged in the mounting position 21 (each mounting position 21 corresponds to the clamping plate and the air cylinder); the clamping plate can be driven by the air cylinder to clamp the battery core 99, so as to fix the battery core 99; as some embodiments of the present application, the battery liquid injection device further includes a limiting spring and a clamping plate, and the limiting spring and the clamping plate are arranged in the mounting position 21 (each mounting position 21 corresponds to the clamping plate and the limiting spring); the clamping plate can be driven by the limiting spring to clamp the battery core 99.

[0034] The liquid injection assembly 40 is used for injecting liquid into the battery core 99 placed in the mounting position 21; as some embodiments of the present application, the liquid injection container 10 and the liquid injection assembly 40 are in communication through a pipeline, so that the electrolyte in the liquid injection assembly 40 flows into the liquid injection container 10, and the battery core 99 is injected with liquid.

[0035] The ultrasonic wave generating modules 30 are arranged in the liquid injection cavity 15, the number of the ultrasonic wave generating modules 30 can be, but is not limited to, four, six, eight, etc. Each of the ultrasonic wave generating modules 30 is arranged in correspondence with at least one mounting position 21.

[0036] As some embodiments of the present application, the working frequency of the ultrasonic wave generating module 30 is set to 80KHz-100KHz, and the working time is a preset time, for example, but not limited to, 5min.

[0037] As some embodiments of the present application, one ultrasonic wave generating module 30 can be arranged in correspondence with one or more mounting positions 21, or a plurality of ultrasonic wave generating modules 30 can be arranged in correspondence with one mounting position 21, for example, one ultrasonic wave generating module 30 can be arranged in correspondence with one mounting position 21, or one ultrasonic wave generating module 30 can be arranged in correspondence with two mounting positions 21, or two ultrasonic wave generating modules 30 can be arranged in correspondence with one mounting position 21.

[0038] As some embodiments of the present application, the battery liquid injection device further comprises a controller, the plurality of ultrasonic wave generating modules 30 are electrically connected through wires 57, and the plurality of ultrasonic wave generating modules 30 are connected with the controller through the wires 57, and the plurality of ultrasonic wave generating modules 30 are connected with the power supply through the wires 57, so as to facilitate synchronous control of the plurality of ultrasonic wave generating modules 30.

[0039] It should be noted that the ultrasonic wave generating module 30 can emit ultrasonic waves towards the corresponding mounting position 21, and the bubbles adhered to the pole piece of the battery cell 99 can be quickly decomposed by the ultrasonic waves, thereby improving the electrolyte infiltration efficiency, and the electrolyte and the pole piece can resonate by the ultrasonic waves, which is beneficial to further improve the electrolyte infiltration efficiency.

[0040] Therefore, by arranging a plurality of ultrasonic wave generating modules 30 and arranging each of the ultrasonic wave generating modules 30 in correspondence with at least one mounting position 21, ultrasonic waves can be generated to the battery cell 99 by the ultrasonic wave generating modules 30, the emitted ultrasonic waves can quickly decompose the bubbles adhered to the pole piece, thereby improving the electrolyte infiltration efficiency, and the emitted ultrasonic waves can make the electrolyte and the pole piece resonate, thereby further improving the electrolyte infiltration efficiency, so as to improve the liquid injection efficiency and improve the production efficiency of the battery.

[0041] In some embodiments of the present application, as shown in Figure 1 The mounting position 21 is configured as a mounting groove and opens towards the first sub-cavity 13, and the plurality of ultrasonic wave generating modules 30 are arranged in the second sub-cavity 14.

[0042] The liquid injection cavity 15 can include a first sub-cavity 13 and a second sub-cavity 14. Figure 1 The fixing seat 20 is arranged in the liquid injection cavity 15, and the fixing seat 20 can divide the liquid injection cavity 15 into the first sub-cavity 13 and the second sub-cavity 14 along the height direction of the battery liquid injection device (i.e.

[0043] The mounting position 21 is configured as a mounting groove, so that the battery cell 99 is stably arranged in the mounting groove. Figure 1 The mounting groove is open to the first sub-cavity 13 along the height direction of the battery liquid injection device (i.e.

[0044] As some embodiments of the present application, the bottom of the mounting groove is configured as a gel structure, which can reduce the impact force between the battery cell 99 and the fixing seat 20, and is beneficial to reduce the risk of damage to the battery cell 99.

[0045] By dividing the liquid injection cavity 15 into the first sub-cavity 13 and the second sub-cavity 14 by the fixing seat 20, the liquid injection cavity 15 can be divided into two separate spaces.

[0046] In some embodiments of the present application, as shown in Figure 1 The ultrasonic wave generating module 30 has an output end, and the output ends of the plurality of ultrasonic wave generating modules 30 are attached to one end of the fixing seat 20 facing the second sub-cavity 14.

[0047] The fixing seat 20 has two opposite ends, one end faces the first sub-cavity 13, and the other end faces the second sub-cavity 14.

[0048] By attaching the output ends of the plurality of ultrasonic wave generating modules 30 to one end of the fixing seat 20 facing the second sub-cavity 14, the direction of the ultrasonic waves emitted by the ultrasonic wave generating module 30 can be accurate, so that the bubbles adhered to the pole piece can be quickly decomposed, the electrolyte infiltration efficiency can be improved, and the path between the output end of the ultrasonic wave generating module 30 and the battery cell 99 can be shortened, the ultrasonic wave loss can be reduced, and the electrolyte infiltration efficiency can be further improved, which is beneficial to improve the production efficiency of the battery.

[0049] In some embodiments of the utility model, as shown in Figure 1 The number of ultrasonic wave generating modules 30 is the same as and one-to-one corresponds to the number of mounting positions 21.

[0050] The number of mounting positions 21 can be multiple, and the number of mounting positions 21 can be, but is not limited to, four, six, eight, etc. The number of ultrasonic wave generating modules 30 is the same as and one-to-one corresponds to the number of mounting positions 21. In some embodiments of the application, one battery cell 99 is arranged at each mounting position 21, so that the number of ultrasonic wave generating modules 30 is the same as and one-to-one corresponds to the number of battery cells 99, that is, each ultrasonic wave generating module 30 corresponds to one battery cell 99.

[0051] By making the number of ultrasonic wave generating modules 30 the same as and one-to-one corresponding to the number of mounting positions 21, each ultrasonic wave generating module 30 can generate ultrasonic waves towards the corresponding battery cell 99, so that as many ultrasonic waves as possible can be directed towards the battery cell 99, reducing the invalid area, thereby further improving the electrolyte infiltration efficiency.

[0052] In some embodiments of the utility model, as shown in Figure 2 And Figure 3 As shown in the drawings, the liquid injection assembly 40 comprises a first liquid storage container 41, a pump 42, and a plurality of liquid injection branches 43. The pump 42 is connected to the first liquid storage container 41 and the plurality of liquid injection branches 43. The pump 42 is used to deliver the liquid in the first liquid storage container 41 to the plurality of liquid injection branches 43. The liquid injection branch 43 comprises a second liquid storage container 431, a first control valve 51, and a liquid injection member 432 connected in sequence. The liquid injection member 432 is located downstream of the first control valve 51. The plurality of liquid injection members 432 correspond one-to-one to the plurality of mounting positions 21 to inject liquid into the battery cell 99.

[0053] The pump 42 is connected to the first liquid storage container 41 through a pipeline. The pump 42 is connected to the liquid injection branch 43 through a pipeline. In some embodiments of the application, a fifth control valve 56 is arranged between the pump 42 and the first liquid storage container 41. By controlling the opening and closing of the fifth control valve 56, the connection between the first liquid storage container 41 and the pump 42 can be controlled.

[0054] The pump 42 is arranged downstream of the first liquid storage container 41. The pump 42 can deliver the liquid in the first liquid storage container 41 to the liquid injection branch 43. The number of liquid injection branches 43 can be multiple, and the number of liquid injection branches 43 can be, but is not limited to, four, six, eight, etc. In some embodiments of the application, the number of liquid injection branches 43 is twelve. It should be noted that part of the liquid injection branch 43 can extend into the liquid injection cavity 15. This arrangement can improve the accuracy of liquid injection.

[0055] The second liquid storage container 431, the first control valve 51 and the liquid injection member 432 are sequentially connected, that is, electrolyte can sequentially flow through the second liquid storage container 431, the first control valve 51 and the liquid injection member 432. The first control valve 51 is arranged downstream of the second liquid storage container 431, and the liquid injection member 432 is located downstream of the first control valve 51. The number of the liquid injection branch 43 is multiple, so the number of the liquid injection member 432 is multiple. The number of the liquid injection member 432 is the same as the number of the mounting position 21 and one-to-one correspondence. As some embodiments of the present application, twelve liquid injection members 432 are arranged one-to-one with twelve mounting positions 21 to simultaneously inject electrolyte into the twelve mounting positions 21 through the twelve liquid injection members 432.

[0056] It can be understood that, since the second liquid storage container 431, the first control valve 51 and the liquid injection member 432 are sequentially connected and the liquid injection member 432 is located downstream of the first control valve 51, when the first control valve 51 is closed, the electrolyte in the second liquid storage container 431 cannot flow into the liquid injection member 432.

[0057] As some embodiments of the present application, the liquid injection assembly 40 further comprises a conversion cup connected between the pump member 42 and the liquid injection branch 43. The pump member 42 can pump electrolyte in the first liquid storage container 41 into the conversion cup to uniformly deliver the electrolyte to the plurality of liquid injection branches 43 through the conversion cup. Such arrangement can make the flow rate and flow of electrolyte in the plurality of liquid injection branches 43 uniform, thereby making the injection amount of the plurality of liquid injection members 432 to the plurality of battery cells 99 uniform and consistent, which is beneficial to improve the use reliability of the battery liquid injection device.

[0058] By connecting the pump member 42 with the first liquid storage container 41 and the plurality of liquid injection branches 43, the electrolyte in the first liquid storage container 41 can be simultaneously delivered to the plurality of liquid injection branches 43 through the pump member 42, which is beneficial to simplify the battery liquid injection device and make the flow rate of electrolyte in the liquid injection branch 43 uniform. Moreover, by arranging the liquid injection branch 43 to sequentially include the second liquid storage container 431, the first control valve 51 and the liquid injection member 432, when performing the battery liquid injection work, the first control valve 51 can be closed, and then the alignment of the battery cell 99 and the liquid injection member 432 and the injection of electrolyte into the plurality of second liquid storage containers 431 of the plurality of liquid injection branches 43 can be simultaneously performed. After the battery cell 99 and the liquid injection member 432 are aligned, the first control valve 51 is opened, and the electrolyte in the second liquid storage container 431 can be quickly injected into the battery cell 99 through the liquid injection member 432, thereby greatly improving the injection efficiency. In addition, storing electrolyte in the second liquid storage container 431 can reduce the bubbles in the electrolyte, which is beneficial to improve the infiltration efficiency.

[0059] As some embodiments of the present application, the liquid injection member 432 can be configured as a liquid injection nozzle.

[0060] In some embodiments of the utility model, as shown in Figure 3 As shown in the figure, the liquid injection branch 43 further comprises a third liquid storage container 444, the third liquid storage container 444 is connected between the first control valve 51 and the liquid injection part 432, that is, the first control valve 51 is arranged upstream of the third liquid storage container 444, and the liquid injection part 432 is arranged downstream of the third liquid storage container 444. By connecting the third liquid storage container 444 between the first control valve 51 and the liquid injection part 432, when the first control valve 51 is opened, the electrolyte in the second liquid storage container 431 can flow into the third liquid storage container 444, and then flow out from the third liquid storage container 444 through the liquid injection part 432. Such an arrangement can further reduce the gas bubbles in the electrolyte, and make the electrolyte flow out from the third liquid storage container 444 through the liquid injection part 432, which can make the flow rates of the electrolyte flowing out from the plurality of liquid injection branches 43 consistent, thereby improving the liquid injection effect of the battery liquid injection device.

[0061] In some embodiments of the utility model, as shown in Figure 2 As shown in the figure, the liquid injection assembly 40 further comprises a defoaming container 433, a first liquid inlet pipe 434, a first vacuum pipe 435, a first normal-pressure pipe 436, and a second liquid inlet pipe 437. The first liquid inlet pipe 434, the first vacuum pipe 435, and the first normal-pressure pipe 436 are all connected with the defoaming container 433, and the second liquid inlet pipe 437 is connected between the defoaming container 433 and the first liquid storage container 41. A plurality of second control valves 52 are arranged on the first liquid inlet pipe 434, the first vacuum pipe 435, the first normal-pressure pipe 436, and the second liquid inlet pipe 437.

[0062] As some embodiments of the present application, the battery liquid injection device further comprises a medium source, and the first liquid inlet pipe 434 is connected between the medium source and the defoaming container 433, so that the electrolyte of the medium source enters the defoaming container 433 through the first liquid inlet pipe 434. As some embodiments of the present application, the battery liquid injection device further comprises a first vacuum pump, and the first vacuum pipe 435 is connected between the first vacuum pump and the defoaming container 433. The defoaming container 433 is vacuumized by the first vacuum pump, and then the medium source is communicated with the defoaming container 433. The electrolyte of the medium source can flow into the defoaming container 433 by the action of air pressure, and the electrolyte in the defoaming container 433 can be defoamed by the first vacuum pump, so as to reduce the amount of gas bubbles in the electrolyte and improve the liquid injection precision.

[0063] As some embodiments of the present application, the battery electrolyte injection device further comprises a first normal pressure container, and the first normal pressure pipe 436 is connected between the first normal pressure container and the defoaming container 433. It can be understood that, after the defoaming container 433 is subjected to the vacuum defoaming treatment, the pressure in the defoaming container 433 is negative pressure, and the electrolyte cannot flow into the first liquid storage container 41 through the second liquid inlet pipe 437. By connecting the first normal pressure pipe 436 between the first normal pressure container and the defoaming container 433, the pressure in the defoaming container 433 can be changed from negative pressure to normal pressure, so that the electrolyte can flow into the first liquid storage container 41 through the second liquid inlet pipe 437.

[0064] The second control valve 52 is arranged on the first liquid inlet pipe 434, the first vacuum pipe 435, the first normal pressure pipe 436 and the second liquid inlet pipe 437. As some embodiments of the present application, the second control valve 52 is configured as an electromagnetic valve. By controlling the opening and closing of the second control valve 52 on the first liquid inlet pipe 434, the first vacuum pipe 435, the first normal pressure pipe 436 and the second liquid inlet pipe 437 respectively, the first liquid inlet pipe 434, the first vacuum pipe 435, the first normal pressure pipe 436 and the second liquid inlet pipe 437 can be controlled to be connected or disconnected respectively.

[0065] In this way, the battery electrolyte injection device can be reasonable, the content of bubbles in the electrolyte can be reduced, and the injection precision can be improved.

[0066] In some embodiments of the present application, as shown in Figure 2 The injection assembly 40 further comprises a second normal pressure pipe 438 and an inert gas communication pipe 439. The second normal pressure pipe 438 and the inert gas communication pipe 439 are connected with the first liquid storage container 41. The setting height of the first liquid storage container 41 is lower than that of the defoaming container 433. A plurality of third control valves 53 are arranged on the inert gas communication pipe 439 and the second normal pressure pipe 438.

[0067] As some embodiments of the present application, the battery electrolyte injection device further comprises a second normal pressure container, and the second normal pressure pipe 438 is connected between the second normal pressure container and the first liquid storage container 41. It can be understood that, by setting the pressure in the first liquid storage container 41 to be normal pressure and setting the setting height of the first liquid storage container 41 to be lower than that of the defoaming container 433, the electrolyte can flow into the first liquid storage container 41 through the second liquid inlet pipe 437.

[0068] As some embodiments of the present application, the gas in the first normal pressure container and the second normal pressure container can be inert gas. Compared with air, the gas in the first normal pressure container and the second normal pressure container, this setting can reduce the probability of reaction of the electrolyte with some components, and can improve the use reliability of the battery electrolyte injection device.

[0069] As some embodiments of the present application, the battery liquid injection device further comprises an inert gas container, an inert gas communication pipe 439 is connected between the inert gas container and the first liquid storage container 41, so as to introduce inert gas into the inert gas container, and the inert gas can be but not limited to helium, nitrogen and the like, as some embodiments of the present application, the inert gas is nitrogen, and it can be understood that the inert gas does not react with the electrolyte, and the inert gas can be introduced into the first liquid storage container 41 before the electrolyte enters the first liquid storage container 41, so as to discharge the air in the first liquid storage container 41, and avoid the reaction between the air in the first liquid storage container 41 and the electrolyte, and it should be noted that the pressure of the inert gas introduced into the first liquid storage container 41 cannot be too high, so that the electrolyte cannot flow into the first liquid storage container 41 due to the large pressure in the first liquid storage container 41.

[0070] The number of the third control valves 53 is multiple, as some embodiments of the present application, the inert gas communication pipe 439 and the second normal pressure pipe 438 are each provided with a third control valve 53, and the opening and closing of the third control valve 53 can be controlled to control the on-off of the inert gas communication pipe 439 and the second normal pressure pipe 438.

[0071] By connecting the second normal pressure pipe 438 and the inert gas communication pipe 439 with the first liquid storage container 41, the air pressure in the first liquid storage container 41 can be maintained at a normal pressure state, so that the electrolyte can flow into the first liquid storage container 41 through the second liquid inlet pipe 437, and the gas in the first liquid storage container 41 can be inert gas, so as to reduce the probability of reaction between the electrolyte in the first liquid storage container 41 and some substances, and by providing the third control valve 53 on the inert gas communication pipe 439 and the second normal pressure pipe 438, the on-off of the inert gas communication pipe 439 and the second normal pressure pipe 438 can be controlled through the third control valve 53, so as to improve the operability of the battery liquid injection device, and such arrangement can make the design of the battery liquid injection device reasonable, and be beneficial to improving the use reliability of the battery liquid injection device.

[0072] In some embodiments of the present application, as shown in Figure 2As shown in the figure, the liquid injection assembly 40 further comprises a second vacuum pipe 440 connected with the first liquid storage container 41, and a third control valve 53 arranged on the second vacuum pipe 440; as some embodiments of the present application, the battery liquid injection device further comprises a second vacuum pump, and the second vacuum pipe 440 is connected between the second vacuum pump and the first liquid storage container 41; before the electrolyte enters the first liquid storage container 41, the first liquid storage container 41 can be vacuumized by the second vacuum pump, so that the first liquid storage container 41 maintains negative pressure, and the electrolyte can flow from the second liquid storage container 431 to the first liquid storage container 41 under the action of pressure.

[0073] In this way, the electrolyte in the second liquid storage container 431 can quickly flow into the first liquid storage container 41, which is beneficial to improve the liquid injection efficiency.

[0074] As some embodiments of the present application, the height of the defoaming container 433 is higher than the height of the first liquid storage container 41, and in this way, the electrolyte can flow to the first liquid storage container 41 naturally.

[0075] As some embodiments of the present application, the height of the defoaming container 433 and the height of the first liquid storage container 41 can be set arbitrarily, and by vacuumizing the first liquid storage container 41, the electrolyte can flow from the defoaming container 433 to the first liquid storage container 41 under the action of pressure.

[0076] As some embodiments of the present application, the height of the defoaming container 433 is higher than the height of the first liquid storage container 41, and by vacuumizing the first liquid storage container 41, the electrolyte can flow from the defoaming container 433 to the first liquid storage container 41 under the action of pressure, and in this way, the rate of the electrolyte flowing to the first liquid storage container 41 can be further improved, which is beneficial to improve the production efficiency of the battery.

[0077] In some embodiments of the present application, as shown in the figure, Figure 2 As shown in the figure, the battery liquid injection device further comprises a collection container 441, a first liquid discharge pipe 442 and a second liquid discharge pipe 443, the first liquid discharge pipe 442 is connected between the defoaming container 433 and the collection container 441, and the second liquid discharge pipe 443 is connected between the first liquid storage container 41 and the collection container 441; a plurality of fourth control valves 54 are arranged on the first liquid discharge pipe 442 and the second liquid discharge pipe 443.

[0078] The defoaming container 433 is connected with the collecting container 441 through the first liquid discharge pipe 442, the first liquid storage container 41 is connected with the collecting container 441 through the second liquid discharge pipe 443, and the fourth control valve 54 is arranged on the first liquid discharge pipe 442 and the second liquid discharge pipe 443, so that the opening and closing of the first liquid discharge pipe 442 can be controlled by controlling the fourth control valve 54 arranged on the first liquid discharge pipe 442, the electrolyte in the defoaming container 433 can be discharged, and the opening and closing of the second liquid discharge pipe 443 can be controlled by controlling the fourth control valve 54 arranged on the second liquid discharge pipe 443, the electrolyte in the first liquid storage container 41 can be discharged.

[0079] By connecting the first liquid discharge pipe 442 between the defoaming container 433 and the collecting container 441 and connecting the second liquid discharge pipe 443 between the first liquid storage container 41 and the collecting container 441, and arranging the fourth control valve 54 on the first liquid discharge pipe 442 and the second liquid discharge pipe 443, the electrolyte in the defoaming container 433 and the first liquid storage container 41 can be recycled.

[0080] As some embodiments of the present application, after the liquid injection is completed, the inert gas can be introduced into the liquid injection assembly 40 through the inert gas communication pipe 439, and under the action of gas pressure, the residual electrolyte in the liquid injection assembly 40 can be discharged, which is beneficial to the cleaning of the pipeline in the liquid injection assembly 40.

[0081] As some embodiments of the present application, the battery liquid injection device further comprises a controller, the first control valve 51, the second control valve 52, the third control valve 53 and the fourth control valve 54 can be configured as electromagnetic valves (such as diaphragm electromagnetic valves), and the controller is electrically connected with the first control valve 51, the second control valve 52, the third control valve 53 and the fourth control valve 54 respectively to control the opening and closing of the first control valve 51, the second control valve 52, the third control valve 53 and the fourth control valve 54.

[0082] As some embodiments of the present application, the battery liquid injection device further comprises a manual liquid discharge valve 55, and the defoaming container 433, the liquid storage container 41 and the collecting container 441 are all provided with the manual liquid discharge valve 55, so that the valve can be manually opened to discharge the electrolyte in the defoaming container 433, the liquid storage container 41 and the collecting container 441, which is beneficial to improving the use reliability of the battery liquid injection device.

[0083] As some embodiments of the present application, the battery liquid injection device further comprises a liquid level sensor connected with the controller, and the liquid level sensor can be, but is not limited to, a glass liquid level sensor, a pressure liquid level sensor, a float liquid level sensor, a capacitive liquid level sensor, a resistance liquid level sensor, etc.

[0084] As some embodiments of the present application, the defoaming container 433, the liquid storage container 41 and the collection container 441 are each provided with a liquid level sensor capable of detecting and displaying the liquid level information in the defoaming container 433, the liquid storage container 41 and the collection container 441.

[0085] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0086] In the description of the present application, "a first feature" and "a second feature" can include one or more features.

[0087] In the description of the present application, "a plurality of" means two or more.

[0088] In the description of the present application, "above" or "below" of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0089] In the description of the present application, "above", "over" and "on" of a first feature to a second feature include that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature.

[0090] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery liquid injection device, characterized by comprising: The application relates to a battery liquid injection device. The battery liquid injection device comprises: a liquid injection container (10) defining a liquid injection cavity (15); a fixing seat (20) arranged in the liquid injection cavity (15), the fixing seat (20) having a plurality of mounting positions (21) for carrying battery cells (99); a liquid injection assembly (40) for injecting liquid into the battery cells (99) placed in the mounting positions (21); 2. The battery liquid injecting apparatus according to claim 1, wherein a plurality of ultrasonic wave generating modules (30) arranged in the liquid injection cavity (15), each of the ultrasonic wave generating modules (30) being arranged in correspondence with at least one of the mounting positions (21).

3. The battery liquid injecting apparatus according to claim 2, wherein The fixing seat (20) divides the liquid injection cavity (15) into a first sub-cavity (13) and a second sub-cavity (14), the mounting positions (21) are configured as mounting grooves and open towards the first sub-cavity (13), and the plurality of ultrasonic wave generating modules (30) are arranged in the second sub-cavity (14).

4. The battery liquid injecting apparatus according to claim 1, wherein The ultrasonic wave generating modules (30) have output ends, and the output ends of the plurality of ultrasonic wave generating modules (30) are attached to one end of the fixing seat (20) facing the second sub-cavity (14).

5. The battery liquid injecting apparatus according to claim 1, wherein The number of the ultrasonic wave generating modules (30) is the same as and corresponds to the number of the mounting positions (21). The liquid injection assembly (40) comprises a first liquid storage container (41), a pump (42) and a plurality of liquid injection branches (43), the pump (42) being connected with the first liquid storage container (41) and the plurality of liquid injection branches (43), and the pump (42) being used for conveying liquid in the first liquid storage container (41) to the plurality of liquid injection branches (43).

6. The battery liquid injecting apparatus according to claim 5, wherein The liquid injection branch (43) comprises a second liquid storage container (431), a first control valve (51) and a liquid injection member (432) connected in sequence, the liquid injection member (432) being located downstream of the first control valve (51), and the plurality of liquid injection members (432) corresponding to the plurality of mounting positions (21) to inject liquid into the battery cells (99).

7. The battery liquid injecting apparatus according to claim 5, wherein The liquid injection branch (43) further comprises a third liquid storage container (444) connected between the first control valve (51) and the liquid injection member (432). The liquid injection assembly (40) further comprises a defoaming container (433), a first liquid inlet pipe (434), a first vacuum pipe (435), a first normal-pressure pipe (436) and a second liquid inlet pipe (437), the first liquid inlet pipe (434), the first vacuum pipe (435) and the first normal-pressure pipe (436) being connected with the defoaming container (433), and the second liquid inlet pipe (437) being connected between the defoaming container (433) and the first liquid storage container (41). A plurality of second control valves (52) are arranged on the first liquid inlet pipe (434), the first vacuum pipe (435), the first normal-pressure pipe (436) and the second liquid inlet pipe (437).

8. The battery liquid injecting apparatus according to claim 7, wherein The liquid injection assembly (40) further comprises a second normal pressure pipe (438) and an inert gas communication pipe (439), both of which are connected with the first liquid storage container (41), and the first liquid storage container (41) is arranged at a height lower than the defoaming container (433). A plurality of third control valves (53) are arranged on the inert gas communication pipe (439) and the second normal pressure pipe (438).

9. The battery liquid injecting apparatus according to claim 7 or 8, wherein The liquid injection assembly (40) further comprises a second vacuum pipe (440) and a third control valve (53), the second vacuum pipe (440) is connected with the first liquid storage container (41), and the third control valve (53) is arranged on the second vacuum pipe (440).

10. The battery liquid injecting apparatus according to claim 7 or 8, wherein Further comprising: A collection container (441), a first liquid discharge pipe (442) and a second liquid discharge pipe (443), the first liquid discharge pipe (442) is connected between the defoaming container (433) and the collection container (441), and the second liquid discharge pipe (443) is connected between the first liquid storage container (41) and the collection container (441); A plurality of fourth control valves (54) are arranged on the first liquid discharge pipe (442) and the second liquid discharge pipe (443).

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