Electrolyte injection device, battery production line, and electrolyte injection method

Abstract

An electrolyte injection device, a battery (100) production line, and an electrolyte injection method, relating to the technical field of battery (100) manufacturing. The electrolyte injection device comprises an electrolyte injection apparatus (1). The electrolyte injection apparatus (1) comprises: a battery fixture (11), at least one battery (100) accommodating slot being formed in the battery fixture (11), and a set position being present inside the battery (100) accommodating slot; a position adjustment mechanism (12), the position adjustment mechanism (12) being configured to adjust a battery (100) which has been placed in the battery (100) accommodating slot but not in the set position to the set position; and an electrolyte injection mechanism (13), the electrolyte injection mechanism (13) being configured to be connected to an electrolyte injection port of the battery (100) located at the set position and to perform an electrolyte injection operation of injecting an electrolyte into the battery (100). The position adjustment mechanism (12) is used to adjust the position of the battery (100) not located at the set position, so that the battery (100) moves to the set position; and since the position of the battery (100) is corrected, the electrolyte injection mechanism (13) can be accurately connected to the electrolyte injection port of the battery (100). Therefore, the electrolyte injection device, the battery (100) production line, and the electrolyte injection method improve the accuracy of the connection between the electrolyte injection mechanism (13) and the electrolyte injection port of the battery (100).

Description

Liquid injection device, battery production line and liquid injection method

[0001] Cross-reference to related disclosures

[0002] The present disclosure is based on the Chinese patent publication No. 202410449989.8, filed on April 15, 2024, entitled "Liquid injection device, battery production line and liquid injection method", and claims priority to the Chinese patent application, the entire contents of which are hereby incorporated by reference into the present disclosure. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of battery manufacturing, in particular to a liquid injection device, a battery production line and a liquid injection method. BACKGROUND

[0004] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used, and batteries are also increasingly used in the energy storage field and the like. In new energy vehicles equipped with batteries, the batteries can be used to provide all or part of the power. In the energy storage field, the batteries can be installed in energy storage boxes or directly installed at the user side.

[0005] In the production process of the battery, after the bare battery cell is put into the shell, there is a battery liquid injection process. First, the liquid outlet nozzle of the liquid injection device is connected to the liquid injection port of the battery, and then the electrolyte is injected into the battery through the liquid outlet nozzle. The accuracy of the connection between the liquid outlet nozzle and the liquid injection port of the battery relates to the success rate of the battery liquid injection. Therefore, how to improve the accuracy of the connection between the liquid outlet nozzle of the liquid injection device and the liquid injection port of the battery is one of the topics that the industry needs to study.

[0006] SUMMARY

[0007] To solve the above technical problems, the present disclosure provides a liquid injection device, a battery production line and a liquid injection method capable of improving the accuracy of the connection with the liquid injection port of the battery.

[0008] The present disclosure is achieved by the following technical solutions.

[0009] The first aspect of the present disclosure provides a liquid injection device, comprising a liquid injection device, the liquid injection device comprising: a battery clamp provided with at least one battery accommodating groove, the battery accommodating groove having a set position; a position adjusting mechanism configured to adjust a battery that has been placed in the battery accommodating groove and is not located at the set position to the set position; a liquid injection mechanism configured to connect to a liquid injection port of the battery located at the set position and perform a liquid injection operation of injecting electrolyte into the battery; and an upper portion of the battery accommodating groove is provided with an access slot, and the position adjusting mechanism is configured to press the battery from top to bottom so that the battery moves to the set position in the battery accommodating groove.

[0010] When the liquid injection device provided by the present disclosure is used to inject liquid into a battery, the battery is first placed in the battery accommodating groove of the battery clamp, and the position adjusting mechanism is used to adjust the position of the battery that is not located at the set position, so that the battery moves to the set position. Since the position of the battery is corrected, the liquid injection mechanism can accurately connect to the liquid injection port of the battery, thereby improving the accuracy of the connection between the liquid injection mechanism and the liquid injection port of the battery.

[0011] The access slot is provided at the upper portion of the battery accommodating groove, so that the direction of placing the battery is from top to bottom, that is, the battery needs to be loaded into the battery accommodating groove from top to bottom. In this case, after the battery is inserted into the access slot from top to bottom, the battery can be released, and the battery will automatically move downward and continue to enter the battery accommodating groove under the action of gravity. The pushing action of continuing to push the battery into the battery accommodating groove can be omitted, which is beneficial to improve the efficiency of the operation. In the case that the battery is stuck and cannot continue to move downward, resulting in the battery being unable to move to the set position, the position adjusting mechanism can press the battery from top to bottom to push the battery to the set position, thereby adjusting the position of the battery. This adjustment method is simple in action and high in adjustment efficiency.

[0012] In some embodiments, the liquid injection device further comprises a detection device configured to detect whether the batteries placed in each of the battery accommodating grooves are located at each of the set positions. In the case that at least one battery is not located at the set position, the position adjusting mechanism is used to adjust the battery that is not located at the set position to the set position.

[0013] Through the detection of the detection device, it can be judged whether the battery placed in the battery clamp needs to be adjusted in position. When needed, the position adjusting mechanism is used, and when not needed, the position adjusting mechanism is not used. In this way, automatic detection is realized, the accuracy and efficiency of detection are improved, and the useless operation of the position adjusting mechanism is reduced, thereby improving the operation efficiency of the battery liquid injection.

[0014] In some embodiments, the battery is in the set position when the battery is entirely accommodated in the battery accommodating groove, and the detection device is arranged outside the access slot and triggered when part of the battery extends out of the battery accommodating groove from the access slot.

[0015] When the battery is in the set position, the battery is entirely accommodated in the battery accommodating groove, which can improve the limiting effect of the battery accommodating groove on the battery and the position stability of the battery, thus improving the docking accuracy of the liquid injection mechanism and the battery. Moreover, the detection device detects whether the battery extends out of the access slot to determine whether the battery is in the set position, achieving automatic detection and improving the detection accuracy and efficiency.

[0016] In some embodiments, the liquid injection device further comprises a moving mechanism, the battery clamp is arranged on the moving mechanism and can move between the detection position, the adjustment position and the liquid injection position under the action of the moving mechanism, the detection device detects the battery in the battery clamp in the detection position, the moving mechanism moves the battery clamp to the adjustment position when at least one battery is not in the set position, so that the position adjustment mechanism adjusts the battery, and the moving mechanism moves the battery clamp to the liquid injection position when each battery is in the set position, so that the liquid injection mechanism injects electrolyte into the battery.

[0017] The moving mechanism is used to transfer the battery between the detection position, the adjustment position and the liquid injection position, so as to promote the subsequent position adjustment or liquid injection, and make the liquid injection operation proceed smoothly.

[0018] In some embodiments, the liquid injection device further comprises a liquid injection base, and at least part of the position adjustment mechanism and at least part of the liquid injection mechanism are arranged on opposite sides of the liquid injection base.

[0019] The position adjustment mechanism and the liquid injection mechanism are connected to the liquid injection base, which is conducive to compact structure. Moreover, at least part of the position adjustment mechanism and at least part of the liquid injection mechanism are connected to opposite sides of the liquid injection base, so that the opposite sides of the liquid injection base bear the weight, which is conducive to improving the stability of the liquid injection base.

[0020] In some embodiments, the position adjustment mechanism comprises a pressing base frame mounted on one side of the liquid injection base, and a pressing structure arranged on the pressing base frame and capable of ascending or descending relative to the pressing base frame, the pressing structure being capable of pressing the battery from top to bottom during descending.

[0021] Thus, the function of pressing the battery by the pressing structure is realized, so that the position of the battery can be adjusted, and the accuracy of the connection between the liquid injection mechanism and the battery is improved.

[0022] In some embodiments, the liquid injection mechanism comprises a liquid injection mounting base installed on the other side of the liquid injection base opposite to the pressing base and capable of rising or falling relative to the liquid injection base; and a liquid injection unit installed on the liquid injection mounting base, the liquid injection unit being configured to inject electrolyte into the battery connected thereto; wherein the liquid injection unit is capable of being connected to the battery at the set position during the falling of the liquid injection mounting base.

[0023] Thus, the function of connecting the liquid injection mechanism and the battery and injecting electrolyte into the battery is realized. Since the position adjustment mechanism is provided, each battery is located at a set position, so that the accuracy of the connection between the liquid injection unit and the battery is improved.

[0024] In some embodiments, the pressing base has an installation space, and the liquid injection mechanism further comprises a residual liquid receiving driving member installed in the installation space of the pressing base; and a residual liquid receiving box connected to the output end of the residual liquid receiving driving member, the residual liquid receiving box being capable of moving between a residual liquid receiving position and a retracted position under the driving of the residual liquid receiving driving member, the residual liquid receiving box at the residual liquid receiving position being located below and capable of being connected to the liquid outlet nozzle of the liquid injection unit to receive residual liquid flowing out of the liquid injection unit, and the residual liquid receiving box at the retracted position being misaligned with the liquid outlet nozzle of the liquid injection unit in the vertical direction.

[0025] Thus, the collection of residual liquid after the liquid injection operation is realized, and the influence on the surrounding environment is reduced. Moreover, the residual liquid receiving driving member is installed in the installation space of the pressing base, so that the residual liquid receiving driving member and the pressing structure are jointly installed in the pressing base, which is beneficial to the compactness of the structure, and the installation space of the pressing base accommodates the residual liquid receiving driving member, which reduces the occupation of space and makes the structure more compact.

[0026] In some embodiments, the battery clamp comprises an outer box and at least one partition plate arranged in the outer box, the partition plate separating the space in the outer box into at least two battery accommodating grooves.

[0027] Thus, the structure of the battery clamp is simple, and the cost is low.

[0028] In some embodiments, the liquid injection device further comprises a nail delivery mechanism configured to deliver the battery after the liquid injection operation is completed and to sequentially deliver the battery to the pre-nail station and the full-nail station; a pre-nail mechanism configured to pre-press the sealing nail into the liquid injection port of the battery at the pre-nail station; and a full-nail mechanism configured to press the sealing nail of the battery at the full-nail station so that the sealing nail is installed in place.

[0029] Thus, the sealing of the liquid injection port of the battery is achieved, and the probability of battery liquid leakage is reduced.

[0030] In some embodiments, the nail delivery mechanism comprises a delivery belt configured to drive in the delivery direction; at least two fixed blocks sequentially arranged along the delivery direction and connected to the delivery belt, adjacent fixed blocks being used to limit the opposite sides of the battery, and the spacing between adjacent fixed blocks being adjustable.

[0031] Thus, the function of the nail delivery mechanism to deliver the battery to the pre-nail station or the full-nail station is achieved, and by changing the spacing between adjacent fixed blocks, different sizes of batteries can be limited, thereby improving compatibility.

[0032] In some embodiments, the delivery belt comprises a first delivery belt and a second delivery belt arranged side by side along a direction perpendicular to the delivery direction, adjacent two fixed blocks being connected to the first delivery belt and the second delivery belt respectively, the first delivery belt and the second delivery belt being configured to be synchronously driven in the delivery direction to deliver the battery, and the first delivery belt and the second delivery belt being further configured to be relatively moved in the delivery direction to adjust the spacing between adjacent two fixed blocks.

[0033] Thus, the function of adjusting the spacing between adjacent fixed blocks is achieved, thereby being suitable for delivering batteries of different sizes and improving compatibility.

[0034] In some embodiments, the delivery belt further comprises a third delivery belt arranged on the side of the second delivery belt away from the first delivery belt, the fixed block connected to the first delivery belt being connected to the third delivery belt, and the first delivery belt and the third delivery belt being synchronously driven.

[0035] Thus, the first delivery belt, the second delivery belt and the third delivery belt are sequentially arranged, the second delivery belt being located at the middle position of the entire delivery belt, connecting the middle part of the battery, and the first delivery belt and the third delivery belt connecting the two edge parts of the battery respectively, thereby improving the stability of the fixed block connection and the reliability of the battery limiting.

[0036] In some embodiments, the nail driving and conveying mechanism further comprises a first positioning assembly and a second positioning assembly, which are arranged on opposite sides of the conveying belt, and are configured to respectively push the battery from both sides in a direction perpendicular to the conveying direction to limit the position of the battery.

[0037] In this way, the battery is pushed by the first and second positioning assemblies from both sides in a direction perpendicular to the conveying direction, so that the position of the battery in four directions is limited, and the battery can be accurately positioned at the pre-nail driving station and the full-nail driving station, thereby improving the success rate of the liquid injection port sealing.

[0038] In some embodiments, the first positioning assembly comprises a first pushing member provided with a limiting groove, the limiting groove comprises a first pushing surface facing the second positioning assembly and two limiting surfaces opposite to each other along the conveying direction, and the first pushing member is configured to move towards the second positioning assembly so that the limiting groove is engaged with the battery.

[0039] In this way, during the movement of the first pushing member towards the second positioning assembly, the first pushing member gradually approaches the battery until the limiting groove of the first pushing member is engaged with the battery, so that the first pushing surface of the limiting groove abuts against the surface of the battery, and the two limiting surfaces limit the opposite sides of the battery along the conveying direction, thereby more reliably limiting the position of the battery.

[0040] In some embodiments, the second positioning assembly comprises a clamping structure comprising a first clamping head and a second clamping head, each of the first and second clamping heads is provided with a clamping surface and a second pushing surface, the clamping surfaces of the first and second clamping heads are opposite to each other along the conveying direction, and the second pushing surfaces face the first pushing member, the first and second clamping heads are configured to move towards or away from the first pushing member, and to move towards or away from each other along the conveying direction.

[0041] During the movement of the first and second clamping heads towards the first pushing member, the first and second clamping heads gradually approach the battery until the second pushing surfaces of the first and second clamping heads abut against the battery, and then the first and second clamping heads move towards each other until the clamping surfaces of the first and second clamping heads clamp the opposite surfaces of the battery, respectively, in this way, the battery is clamped by the clamping structure, further improving the reliability of the battery positioning.

[0042] In some embodiments, the nail driving and conveying mechanism is further capable of conveying the battery to a detection station located downstream of the full-nail driving station, and the liquid injection device further comprises a sealing nail detection device configured to detect whether the sealing nail of the battery located at the detection station is installed in place.

[0043] The sealing nail detection device is arranged to detect whether the installation of the sealing nail is qualified, so as to select the unqualified battery for sealing.

[0044] In some embodiments, the nailing conveying mechanism is further capable of conveying the battery to a cleaning station located downstream of the detection station, and the liquid injection device further comprises a cleaning mechanism configured to clean the liquid injection port of the battery at the cleaning station.

[0045] The cleaning mechanism is arranged to clean the liquid injection port, thereby improving the cleanliness of the battery.

[0046] In some embodiments, the liquid injection device further comprises: a code scanning device arranged to scan the code of the battery; a front weighing device located downstream of the code scanning device and upstream of the liquid injection device, the front weighing device being arranged to weigh the battery; and a rear weighing device located downstream of the liquid injection device and upstream of the nailing conveying mechanism, the rear weighing device being arranged to weigh the battery after the liquid injection operation.

[0047] By measuring the weight of the battery before and after the liquid injection, it can be determined whether the weight of the battery before the liquid injection is qualified and whether the weight of the battery after the liquid injection is qualified, so as to select the unqualified battery.

[0048] In some embodiments, the liquid injection device further comprises a defective incoming belt, the defective incoming belt being arranged to receive and convey the battery with unqualified code and unqualified weight.

[0049] The defective incoming belt is used to output the unqualified battery.

[0050] In some embodiments, the liquid injection device further comprises: a liquid injection loading and unloading robot located downstream of the front weighing device, the liquid injection loading and unloading robot being arranged to transfer the battery with qualified code and qualified weight into the battery clamp of the liquid injection device and to remove the battery after the liquid injection operation; a first transfer device located downstream of the liquid injection device and upstream of the rear weighing device, the first transfer device being arranged to receive the battery transferred by the liquid injection loading and unloading robot and to convey the battery to the rear weighing device; a second transfer device located downstream of the rear weighing device and upstream of the nailing conveying mechanism, the second transfer device being arranged to receive and convey the battery from the rear weighing device; and a nailing transfer robot located downstream of the second transfer device and upstream of the nailing conveying mechanism, the nailing transfer robot being arranged to transfer the battery on the second transfer device to the nailing conveying mechanism.

[0051] In this way, the battery can be transferred between adjacent devices.

[0052] The second aspect of the present disclosure provides a battery production line, comprising: a battery casing device configured to load a bare battery cell into a casing to form a battery; and the liquid injection device described above, which is arranged downstream of the battery casing device.

[0053] Since the battery production line comprises the liquid injection device, the battery production line has all the beneficial effects of the liquid injection device, and thus the battery production line can improve the accuracy of the butt joint when the battery is injected with liquid, thereby improving the yield of the battery.

[0054] The third aspect of the present disclosure provides a liquid injection method using a liquid injection device, wherein the liquid injection device comprises a liquid injection device, the liquid injection device comprising a battery clamp, a position adjusting mechanism, and a liquid injection mechanism, the battery clamp being provided with at least one battery accommodating groove, the battery accommodating groove having a set position therein; the upper part of the battery accommodating groove is provided with an inlet and outlet slot, the position adjusting mechanism is configured to press the battery from top to bottom so that the battery moves to the set position in the battery accommodating groove.

[0055] The liquid injection method comprises:

[0056] A feeding step of feeding a battery into the battery accommodating groove of the battery clamp;

[0057] A position adjusting step of adjusting the battery that has been fed into the battery accommodating groove and is not located at the set position to the set position by the position adjusting mechanism;

[0058] A liquid injection step of butt joining the liquid injection port of the battery located at the set position by the liquid injection mechanism and injecting electrolyte into the battery.

[0059] When the battery is injected with liquid by using the liquid injection method provided by the embodiments of the present disclosure, the battery is first fed into the battery accommodating groove of the battery clamp, and the position adjusting mechanism is used to adjust the position of the battery that is not located at the set position, so that the battery moves to the set position. Since the position of the battery is corrected, the liquid injection mechanism can accurately butt join the liquid injection port of the battery, thereby improving the accuracy of the butt joint of the liquid injection mechanism and the liquid injection port of the battery.

[0060] The access slot is arranged at the upper part of the battery accommodating groove, so that the insertion direction of the battery is from top to bottom, that is, the battery needs to be inserted into the battery accommodating groove from top to bottom. In this case, after the battery is inserted into the access slot from top to bottom, the battery can be released, and the battery will automatically move downward under the action of gravity to continue to enter the battery accommodating groove, so that the pushing action of continuing to push the battery into the battery accommodating groove can be omitted, which is beneficial to improve the efficiency of the operation. In the case that the battery is stuck and cannot continue to move downward, resulting in the battery being unable to move to the set position, the battery can be pushed to the set position by pressing the battery from top to bottom through the position adjusting mechanism, so as to realize the adjustment of the position of the battery. The adjustment method is simple in action and high in adjustment efficiency.

[0061] In some embodiments, the liquid injection device further comprises a detection device;

[0062] The liquid injection method further comprises, after the feeding step:

[0063] A detection step, the detection device detects whether the battery placed in each of the battery accommodating grooves is located at each of the set positions,

[0064] In the case that at least one battery is not located at the set position, the position adjustment step is performed, and in the case that each battery is located at each of the set positions, the liquid injection step is performed.

[0065] Through the detection of the detection device, it can be judged whether the battery placed in the battery clamp needs to be adjusted in position, and the position adjusting mechanism is used when needed, and the position adjusting mechanism is not used when not needed. In this way, automatic detection is realized, the accuracy and efficiency of detection are improved, and some useless operations of the position adjusting mechanism can be omitted, thereby improving the operation efficiency of the battery liquid injection.

[0066] In some embodiments, the upper part of the battery accommodating groove is provided with an access slot;

[0067] In the position adjustment step, the position adjusting mechanism presses the battery from top to bottom, so that the battery not located at the set position moves to the set position.

[0068] The access slot is arranged at the upper part of the battery accommodating groove, so that the insertion direction of the battery is from top to bottom, that is, the battery needs to be inserted into the battery accommodating groove from top to bottom. In this case, after the battery is inserted into the access slot from top to bottom, the battery can be released, and the battery will automatically move downward under the action of gravity to continue to enter the battery accommodating groove, so that the pushing action of continuing to push the battery into the battery accommodating groove can be omitted, which is beneficial to improve the efficiency of the operation.

[0069] In some embodiments, the liquid injection device further comprises a moving mechanism, and the battery clamp is arranged on the moving mechanism and is capable of moving between the detection position, the adjustment position and the liquid injection position under the action of the moving mechanism.

[0070] The position adjustment step comprises:

[0071] The adjustment to position step is that the moving mechanism moves the battery clamp from the detection position to the adjustment position.

[0072] The adjustment execution step is that the position adjustment mechanism adjusts the battery not located at the set position to the set position.

[0073] The liquid injection step comprises:

[0074] The liquid injection to position step is that the moving mechanism moves the battery clamp to the liquid injection position.

[0075] The liquid injection execution step is that the liquid injection mechanism connects with the liquid injection port of the battery and injects the electrolyte into the battery.

[0076] The moving mechanism is used to transfer the battery between the detection position, the adjustment position and the liquid injection position, so as to promote the subsequent adjustment execution step or liquid injection execution step, and make the liquid injection operation proceed smoothly.

[0077] In some embodiments, the liquid injection device further comprises a nail driving conveying mechanism, a pre-pressing nail mechanism and a full-pressing nail mechanism.

[0078] The liquid injection method further comprises, after the liquid injection step:

[0079] The pre-pressing to position step is that the nail driving conveying mechanism conveys the battery which has completed the liquid injection step to a pre-pressing nail station.

[0080] The pre-pressing nail step is that the pre-pressing nail mechanism presses the sealing nail into the liquid injection port of the battery located at the pre-pressing nail station.

[0081] The full-pressing to position step is that the nail driving conveying mechanism conveys the battery which has completed the pre-pressing nail step to a full-pressing nail station.

[0082] The full-pressing nail step is that the full-pressing nail mechanism presses the sealing nail of the battery located at the full-pressing nail station, so that the sealing nail is installed in place.

[0083] The nailing conveying mechanism conveys the battery after the liquid injection step to the pre-nailing station, the pre-nailing mechanism presses the sealing nail into the liquid injection port of the battery conveyed to the pre-nailing station, then the nailing conveying mechanism conveys the battery with the sealing nail to the full-nailing station, the full-nailing mechanism presses the sealing nail of the battery conveyed to the full-nailing station, so that the sealing nail is installed in place, thereby completing the sealing of the liquid injection port. In this way, the sealing of the liquid injection port of the battery is realized, and the probability of battery liquid leakage is reduced.

[0084] In some embodiments, the liquid injection device further comprises a sealing nail detection device and a cleaning mechanism;

[0085] The liquid injection method further comprises, after the full-nailing step:

[0086] A sealing detection step, the nailing conveying mechanism conveys the battery after the full-nailing step to the sealing detection station;

[0087] A sealing nail detection step, the sealing nail detection device detects whether the sealing nail of the battery in the sealing detection station is installed in place;

[0088] A cleaning step, the nailing conveying mechanism conveys the battery after the sealing nail detection step to the cleaning station;

[0089] A cleaning step, the cleaning mechanism cleans the liquid injection port of the battery in the cleaning station.

[0090] In this way, by detecting whether the installation of the sealing nail is qualified, it is convenient to select unqualified products subsequently. By cleaning the liquid injection port, the cleanliness of the battery is improved.

[0091] In some embodiments, the liquid injection device further comprises a incoming material scanning device, a front weighing device and a rear weighing device;

[0092] The liquid injection method further comprises, before the discharging step:

[0093] An incoming material scanning step, the incoming material scanning device receives the battery and scans the battery;

[0094] A front weighing step, the front weighing device receives the battery after the incoming material scanning step and weighs the battery;

[0095] The liquid injection method further comprises, between the liquid injection step and the pre-nailing step:

[0096] A rear weighing step, the rear weighing device receives the battery after the liquid injection step and weighs the battery.

[0097] By measuring the weight of the battery before liquid injection and the weight after liquid injection, it can be inferred whether the weight of the battery before liquid injection is qualified and whether the weight of the battery after liquid injection is qualified, so as to screen out unqualified batteries.

[0098] Inventive Effects

[0099] Through the present disclosure, a liquid injection device capable of improving the accuracy of the liquid injection port of the battery, a battery production line and a liquid injection method are provided. BRIEF DESCRIPTION OF DRAWINGS

[0100] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are merely illustrative and are not considered to be limiting in any way. Rather, the drawings are provided to facilitate ease of understanding of the preferred embodiments. Like reference numerals refer to identical parts throughout the drawings. In the drawings:

[0101] FIG. 1 is a top view of a liquid injection device according to some embodiments of the present disclosure;

[0102] FIG. 2 is a perspective view of a plurality of liquid injection devices according to some embodiments of the present disclosure;

[0103] FIG. 3 is a perspective view of a plurality of liquid injection devices according to some embodiments of the present disclosure;

[0104] FIG. 4 is a perspective view of a liquid injection device according to some embodiments of the present disclosure;

[0105] FIG. 5 is a perspective view of a liquid injection device according to some embodiments of the present disclosure;

[0106] FIG. 6 is a perspective view of a liquid injection device according to some embodiments of the present disclosure;

[0107] FIG. 7 is a perspective view of a liquid injection device according to some embodiments of the present disclosure;

[0108] FIG. 8 is a perspective view of a liquid injection cup according to some embodiments of the present disclosure;

[0109] FIG. 9 is a perspective view of a battery clamp according to some embodiments of the present disclosure;

[0110] FIG. 10 is a perspective view of a battery clamp according to some embodiments of the present disclosure;

[0111] FIG. 11 is a perspective view of a pre-pressing nail mechanism, a full-pressing nail mechanism, a sealing nail detection device, a cleaning mechanism, and a nail driving and conveying mechanism according to some embodiments of the present disclosure;

[0112] FIG. 12 is a perspective structural schematic view of a nailing conveying mechanism according to some embodiments of the present disclosure;

[0113] FIG. 13 is an enlarged view of A in FIG. 12;

[0114] FIG. 14 is a perspective structural schematic view of a cleaning mechanism and part of a nailing conveying mechanism according to some embodiments of the present disclosure;

[0115] FIG. 15 is a perspective structural schematic view of a code scanning device according to some embodiments of the present disclosure;

[0116] FIG. 16 is a perspective structural schematic view of a front weighing device according to some embodiments of the present disclosure;

[0117] FIG. 17 is a perspective structural schematic view of a rear weighing device according to some embodiments of the present disclosure;

[0118] FIG. 18 is a perspective structural schematic view of a defective incoming pull tab according to some embodiments of the present disclosure;

[0119] FIG. 19 is a perspective structural schematic view of a liquid injection in-out mechanical arm according to some embodiments of the present disclosure;

[0120] FIG. 20 is a perspective structural schematic view of a first transfer device according to some embodiments of the present disclosure;

[0121] FIG. 21 is a perspective structural schematic view of a second transfer device according to some embodiments of the present disclosure;

[0122] FIG. 22 is a perspective structural schematic view of a nailing transfer mechanical arm according to some embodiments of the present disclosure;

[0123] FIG. 23 is a perspective structural schematic view of an in-out buffer matching pull tab according to some embodiments of the present disclosure;

[0124] FIG. 24 is a perspective structural schematic view of an in-out pull tab according to some embodiments of the present disclosure;

[0125] FIG. 25 is a perspective structural schematic view of a defective in-out pull tab according to some embodiments of the present disclosure;

[0126] FIG. 26 is a perspective structural schematic view of a variable pitch incoming pull tab according to some embodiments of the present disclosure;

[0127] FIG. 27 is a top view of a battery production line according to some embodiments of the present disclosure;

[0128] FIG. 28 is a first flowchart of a liquid injection method according to some embodiments of the present disclosure;

[0129] FIG. 29 is a second flow chart of a liquid injection method according to some embodiments of the present disclosure;

[0130] FIG. 30 is a third flow chart of a liquid injection method according to some embodiments of the present disclosure;

[0131] FIG. 31 is a fourth flow chart of a liquid injection method according to some embodiments of the present disclosure;

[0132] FIG. 32 is a fifth flow chart of a liquid injection method according to some embodiments of the present disclosure;

[0133] FIG. 33 is a sixth flow chart of a liquid injection method according to some embodiments of the present disclosure.

[0134] BRIEF DESCRIPTION OF DRAWINGS

[0135] 100 battery; 1000 battery casing device; 1 liquid injection device; 11 battery clamp; 111 inlet and outlet slot; 112 outer box; 113 partition plate; 114 jacking opening; 12 position adjustment mechanism; 121 down pressure base frame; 122 down pressure structure; 1221 pressure head mounting piece; 1222 pressure head; 123 down pressure driving piece; 13 liquid injection mechanism; 131 liquid injection mounting seat; 132 liquid injection unit; 1321 liquid inlet main pipe; 1322 liquid inlet pipe; 1323 negative pressure air pipe; 1324 liquid injection cup; 13241 cup body; 13242 first end cover; 13243 second end cover; 1325 liquid outlet nozzle; 1326 vacuum extraction valve; 1327 liquid inlet valve; 1328 liquid injection valve; 133 butt joint driving piece; 134 residual liquid receiving box; 135 air outlet pipe; 136 liquid outlet pipe; 137 residual liquid receiving driving piece; 14 detection device; 15 moving mechanism; 151 moving carrier; 152 sliding guide rail; 153 sliding carrier plate; 16 liquid injection base; 17 jacking mechanism; 171 jacking rod; 172 jacking rod mounting frame; 173 jacking driving piece; 21 nailing conveying mechanism; 211 conveying belt; 2111 first conveying belt; 2112 second conveying belt; 2113 third conveying belt; 212 first positioning assembly; 2121 first pushing piece; 2122 limiting groove; 2123 first abutting surface; 2124 limiting surface; 2125 first pushing driving piece; 213 second positioning assembly; 2131 clamping structure; 2132 first chuck; 2133 second chuck; 2134 clamping surface; 2135 second abutting surface; 2136 clamping seat; 2137 second pushing driving piece; 214 fixing block; 22 pre-pressing nail mechanism; 23 full-pressing nail mechanism; 24 sealing nail detection device; 241 CCD visual detection device; 25 cleaning mechanism; 251 drop cleaning liquid mechanism; 252 cleaning cloth cutting mechanism; 253 wiping mechanism; 2531 rotary driving piece; 2532 wiping head; 2533 wiping mounting frame; 254 lifting driving mechanism; 3 incoming material code scanning device; 31 code scanning conveying mechanism; 32 code scanning stop mechanism; 321 stop mounting frame; 322 stop driving piece; 323 stop piece; 33 first code scanning gun; 4 front weighing device; 41 front conveying mechanism; 411 conveying roller; 412 roller mounting frame; 413 roller lifting driving piece; 42 front stop mechanism; 43 front weighing mechanism; 431 weighing sensor; 5 rear weighing device; 51 rear conveying mechanism; 52 rear stop mechanism; 53 rear weighing mechanism; 54 second code scanning gun; 6 liquid injection loading and unloading manipulator; 61 loading and unloading mounting frame; 62 loading horizontal movement driving module; 63 loading lifting driving module; 64 loading clamping jaw; 65 unloading horizontal movement driving module; 66 unloading lifting driving module; 67 unloading clamping jaw; 7 first transfer device; 8 second transfer device; 9 nailing transfer manipulator; 91 transfer mounting frame; 92 transfer horizontal movement driving module; 93 transfer lifting driving module; 94 transfer clamping jaw; 10 incoming material defective pull belt; 20 unloading buffer matched pull belt; 30 unloading pull belt; 40 unloading defective pull belt; 50 incoming material variable pitch pull belt;60 blanking robot. DETAILED DESCRIPTION

[0136] The embodiments of the technical solutions of the present disclosure will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present disclosure, and therefore only serve as examples, and cannot limit the protection scope of the present disclosure.

[0137] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms "include" and "have" and any variations thereof used in the specification and the above drawings description are intended to cover the case where one or more features, functions, procedures, operations, components, and / or elements are included.

[0138] In the description of the embodiments of the present disclosure, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0139] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0140] In the description of the embodiments of the present disclosure, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are "or" relationship.

[0141] In the description of the embodiments of the present disclosure, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed in a particular orientation, be operated or used, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.

[0142] In the description of the embodiments of the present disclosure, unless explicitly defined and limited otherwise, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0143] In the description of the embodiments of the present disclosure, unless explicitly defined and limited otherwise, the technical term "contacting" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0144] In the following, the present disclosure will be described in detail.

[0145] At present, new energy batteries are more and more widely used in life and industry. New energy batteries are not only used in energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0146] In the embodiments of the present disclosure, the battery can be a battery monomer.

[0147] The battery monomer can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging.

[0148] The battery monomer can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present disclosure are not limited thereto.

[0149] The battery monomer includes a bare cell (also known as an electrode assembly). The bare cell includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charging and discharging process of the battery monomer, active ions (such as lithium ions) are inserted and extracted between the positive electrode sheet and the negative electrode sheet. The separator is arranged between the positive electrode sheet and the negative electrode sheet, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0150] In some embodiments, the battery cell can include a shell. The shell is used to encapsulate the bare battery cell and components such as electrolyte. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0151] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shapes of battery cells, the prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, such as a hexagonal prismatic battery cell, etc., and the present disclosure is not particularly limited.

[0152] In some embodiments, the bare battery cell is a jelly-roll structure. The positive electrode tab, the negative electrode tab, and the separator are wound into a jelly-roll structure.

[0153] In some embodiments, the bare battery cell is a stacked structure.

[0154] In the production process of the battery cell (hereinafter referred to as the battery), after the bare battery cell is placed in the shell, there is a liquid injection process. First, the liquid outlet nozzle of the liquid injection equipment is connected to the liquid injection port of the battery, and then the electrolyte is injected into the battery through the liquid outlet nozzle. The present inventors have found that, generally, the battery is placed in the battery clamp, the liquid outlet nozzle and the liquid injection port of the battery in the battery clamp are connected by moving the battery clamp to a predetermined position, and then the liquid injection is realized by the close connection of the liquid outlet nozzle and the liquid injection port of the battery. However, when the battery is not accurately placed in the battery clamp, it is easy to affect the accuracy of the connection of the liquid outlet nozzle and the liquid injection port of the battery. Inaccurate connection will affect the smooth progress of the subsequent liquid injection operation, and will also cause damage to the liquid outlet nozzle or the shell of the battery. Therefore, how to improve the accuracy of the connection of the liquid outlet nozzle of the liquid injection equipment and the liquid injection port of the battery is one of the topics that the industry needs to study.

[0155] The present inventors have found that, by adding a position adjusting mechanism for adjusting the position of the battery in the battery clamp in the liquid injection equipment, the battery that is not located at the set position can be adjusted to the set position, thereby improving the accuracy of the connection of the liquid outlet nozzle and the liquid injection port, and further ensuring the smooth progress of the subsequent liquid injection operation and reducing the probability of damage to the liquid outlet nozzle or the shell of the battery.

[0156] Based on such design concept, the present inventors have designed a liquid injection equipment, which includes a battery clamp, a position adjusting mechanism, and a liquid injection mechanism. The battery clamp is provided with at least one battery accommodating groove, and the battery accommodating groove has a set position. The position adjusting mechanism is configured to adjust the battery that has been placed in the battery accommodating groove and is not located at the set position to the set position. The liquid injection mechanism is configured to connect to the liquid injection port of the battery located at the set position and perform the liquid injection operation of injecting electrolyte into the battery.

[0157] When the battery is injected by the injection equipment provided by the present disclosure, the battery is placed into the battery accommodating groove of the battery clamp, and the position adjustment mechanism is used to adjust the position of the battery which is not located at the set position, so that the battery moves to the set position. Since the position of the battery is corrected, the injection mechanism can be accurately docked to the injection port of the battery, so that the accuracy of the docking of the liquid outlet nozzle and the injection port can be improved.

[0158] The injection equipment of the embodiments of the present disclosure can be used in the injection process of the battery, including but not limited to the first injection after the bare battery cell is put into the shell and the second injection after the formation.

[0159] In the following, some embodiments of the present disclosure are described in detail with reference to FIGS. 1 to 33.

[0160] FIG. 1 is a top view of a liquid injection apparatus according to some embodiments of the present disclosure; FIG. 2 is a perspective view of a plurality of liquid injection devices according to some embodiments of the present disclosure; FIG. 3 is a perspective view of the plurality of liquid injection devices according to some embodiments of the present disclosure; FIG. 4 is a perspective view of a liquid injection device according to some embodiments of the present disclosure; FIG. 5 is a perspective view of the liquid injection device according to some embodiments of the present disclosure; FIG. 6 is a perspective view of the liquid injection device according to some embodiments of the present disclosure; FIG. 7 is a perspective view of the liquid injection device according to some embodiments of the present disclosure; FIG. 8 is a perspective view of a liquid injection cup according to some embodiments of the present disclosure; FIG. 9 is a perspective view of a battery clamp according to some embodiments of the present disclosure; FIG. 10 is a perspective view of the battery clamp according to some embodiments of the present disclosure; FIG. 11 is a perspective view of a pre-pressing nail mechanism, a full-pressing nail mechanism, a sealing nail detection device, a cleaning mechanism, and a nail delivery mechanism according to some embodiments of the present disclosure; FIG. 12 is a perspective view of the nail delivery mechanism according to some embodiments of the present disclosure; FIG. 13 is a magnified view of A in FIG. 12; FIG. 14 is a perspective view of the cleaning mechanism and part of the nail delivery mechanism according to some embodiments of the present disclosure; FIG. 15 is a perspective view of a code scanning device according to some embodiments of the present disclosure; FIG. 16 is a perspective view of a front weighing device according to some embodiments of the present disclosure; FIG. 17 is a perspective view of a rear weighing device according to some embodiments of the present disclosure; FIG. 18 is a perspective view of a defective incoming pull tab according to some embodiments of the present disclosure; FIG. 19 is a perspective view of a liquid injection loading and unloading robot according to some embodiments of the present disclosure; FIG. 20 is a perspective view of a first transfer device according to some embodiments of the present disclosure; FIG. 21 is a perspective view of a second transfer device according to some embodiments of the present disclosure; FIG. 22 is a perspective view of a nail delivery transfer robot according to some embodiments of the present disclosure; FIG. 23 is a perspective view of a discharge buffer and matching pull tab according to some embodiments of the present disclosure; FIG. 24 is a perspective view of a discharge pull tab according to some embodiments of the present disclosure; FIG. 25 is a perspective view of a defective discharge pull tab according to some embodiments of the present disclosure; and FIG. 26 is a perspective view of a variable pitch incoming pull tab according to some embodiments of the present disclosure.

[0161] In some embodiments of the present disclosure, a first direction and a second direction are set for the purpose of illustration, the first direction, the second direction and a vertical direction are directions intersecting with each other, and here, intersecting with each other includes perpendicularly intersecting with each other. For the purpose of understanding the embodiments of the present disclosure, in the embodiments shown in FIGS. 1 to 27, the first direction, the second direction and the vertical direction are directions perpendicularly intersecting with each other are taken as examples for illustration, but those skilled in the art should understand that the embodiments of the present disclosure are not limited to the case where the three directions perpendicularly intersect with each other. For the purpose of illustration, as shown by the arrows in FIGS. 1 to 7, 11 and 12, the direction in which the arrow X is located is taken as the first direction, the direction in which the arrow Y is located is taken as the second direction, and the direction in which the arrow Z is located is taken as the vertical direction. Sometimes, the direction in which the arrow Z points along a third direction is also referred to as "up", and the opposite direction is referred to as "down".

[0162] The first aspect of the present disclosure provides a liquid injection device, as shown in FIGS. 1 to 7, comprising a liquid injection device 1, the liquid injection device 1 comprising a battery clamp 11, a position adjustment mechanism 12 and a liquid injection mechanism 13, the battery clamp 11 being provided with at least one battery accommodating groove, the battery accommodating groove having a set position; the position adjustment mechanism 12 being configured to adjust the battery 100 that has been placed into the battery accommodating groove and is not located at the set position to the set position; and the liquid injection mechanism 13 being configured to connect to the liquid injection port of the battery 100 located at the set position and perform the liquid injection operation of injecting electrolyte into the battery 100.

[0163] The "battery 100 that has been placed into the battery accommodating groove and is not located at the set position" means that after the action of placing the battery 100 into the battery accommodating groove is completed, the battery 100 is not located at the set position in the battery accommodating groove. After the action of placing the battery 100 into the battery accommodating groove is completed and the battery 100 is not located at the set position, at least part of the battery 100 is located in the battery accommodating groove, which can be that part of the battery 100 is in the battery accommodating groove and the remaining part is outside the battery accommodating groove, or can be that the entire battery 100 is in the battery accommodating groove. When the battery 100 is located at the set position, the battery 100 can be that the entire battery 100 is in the battery accommodating groove, or can be that part of the battery 100 is in the battery accommodating groove and the remaining part is outside the battery accommodating groove.

[0164] The position adjustment mechanism 12 can move the battery 100 by pushing, can move the battery 100 by pressing down, can move the battery 100 by jacking up, of course, can move the battery 100 by clamping and moving, and the like, all of which can cause the battery 100 to be displaced so as to be moved to the set position.

[0165] The battery accommodating groove of the battery clamp 11 can be variable in size or fixed in size. The size of the battery accommodating groove of the battery clamp 11 can be adapted to the size of the battery 100, so that when the battery 100 is put into place through the access slot 111 of the battery accommodating groove, the position of the battery 100 in each direction is limited by the battery clamp 11, that is, the surfaces of the battery 100 other than the surface facing the access slot are in contact with the inner wall of the battery accommodating groove or have a spacing within a set range. In this case, when the battery 100 is put into place in the battery accommodating groove, that is, when the end surface of the end of the battery 100 extending into the battery accommodating groove is in contact with the groove bottom surface opposite the access slot of the battery accommodating groove, the battery 100 is in a set position, and when the battery 100 is not put into place, that is, when the end surface of the end of the battery 100 extending into the battery accommodating groove has a spacing from the groove bottom surface of the battery accommodating groove, the battery 100 is not in the set position. At this time, the position adjustment mechanism 12 is needed to move the battery 100 towards the groove bottom surface until the battery 100 is in contact with the groove bottom surface, so that the battery 100 is moved to the set position. The size of the battery accommodating groove of the battery clamp 11 can also be significantly larger than the size of the battery 100, and the battery 100 can move in a direction perpendicular to the direction of insertion of the battery 100 when the battery 100 is accommodated in the battery accommodating groove. In this case, the position adjustment mechanism 12 moves the battery 100 to the set position in the battery accommodating groove by moving the battery 100 along the direction of insertion of the battery 100 or a direction perpendicular to the direction of insertion of the battery 100 or other directions.

[0166] When the battery 100 is injected by the injection device provided by the present disclosure, the battery 100 is first put into the battery accommodating groove of the battery clamp 11, and the position adjustment mechanism 12 is used to adjust the position of the battery 100 that is not in the set position, so that the battery 100 is moved to the set position. Since the position of the battery 100 is corrected, the injection mechanism 13 can accurately dock with the injection port of the battery 100, thereby improving the accuracy of the docking of the injection mechanism 13 and the injection port of the battery 100.

[0167] In some embodiments of the present disclosure, as shown in FIGS. 5 and 7, the injection device 1 further comprises a detection device 14 configured to detect whether the battery 100 put into each battery accommodating groove is in the set position. In the case where at least one battery 100 is not in the set position, the position adjustment mechanism 12 is used to adjust the battery 100 that is not in the set position to the set position.

[0168] "whether the batteries 100 placed in the battery accommodating grooves are all located at the set positions" means whether the batteries 100 placed in the battery accommodating grooves of the same battery clamp 11 are all located at the set positions in the battery accommodating grooves. When at least one of the batteries 100 placed in the same battery clamp 11 is not located at the set position, the position adjustment mechanism 12 needs to be used for adjustment, and when all the batteries 100 are located at the set positions in the corresponding battery accommodating grooves, the position adjustment mechanism 12 does not need to be used.

[0169] Through the detection of the detection device 14, it can be determined whether the batteries 100 placed in the battery clamp 11 need to be adjusted in position, and the position adjustment mechanism 12 is used when needed, and is not used when not needed, so that automatic detection is realized, the accuracy and efficiency of detection are improved, and useless work of the position adjustment mechanism 12 is reduced, and the work efficiency of battery liquid injection is improved.

[0170] In some embodiments of the present disclosure, the upper part of the battery accommodating groove is provided with an access slot 111, and the position adjustment mechanism 12 is configured to press the battery 100 from top to bottom, so that the battery 100 moves to the set position in the battery accommodating groove.

[0171] The access slot 111 is arranged at the upper part of the battery accommodating groove, so that the placing direction of the battery 100 is from top to bottom, that is, the battery 100 needs to be loaded into the battery accommodating groove from top to bottom. In this case, after the battery 100 is inserted into the access slot 111 from top to bottom, the battery 100 can be released, and the battery 100 will automatically move downward under the action of gravity and continue to enter the battery accommodating groove, so that the pushing action of continuing to push the battery 100 into the battery accommodating groove can be omitted, which is beneficial to improve the work efficiency.

[0172] However, after the battery 100 is inserted into the access slot 111, in the case that the upper part of the battery 100 is slightly tilted or the size of the access slot 111 has an error, the battery 100 will be stuck and cannot continue to move downward, resulting in the case that it cannot move to the set position. Therefore, the battery 100 is pushed to the set position by the position adjustment mechanism 12 pressing the battery 100 from top to bottom, so that the adjustment of the position of the battery 100 is realized, and the adjustment method is simple in action and high in adjustment efficiency.

[0173] In some embodiments of the present disclosure, the battery 100 is located at the set position when the battery 100 is completely accommodated in the battery accommodating groove, and the detection device 14 is arranged outside the access slot 111, and the detection device 14 is triggered when part of the battery 100 protrudes out of the battery accommodating groove from the access slot 111.

[0174] When all of the battery 100 is in the battery accommodating groove, the battery 100 is in the set position. It can be understood that, after the action of placing the battery 100 into the battery accommodating groove is completed, if all of the battery 100 is accommodated in the battery accommodating groove, that is, there is no part of the battery 100 extending out of the access slot 111, at this time, the battery 100 is in the set position; if there is still part of the battery 100 extending out of the access slot 111, it indicates that the battery 100 is not in the set position, therefore, when the detection device 14 is triggered, it can be detected that part of the battery 100 extends out of the battery accommodating groove, so as to determine that the battery 100 is not in the set position, and when the detection device 14 is not triggered, it is determined that the battery 100 is in the set position.

[0175] For example, the detection device 14 includes a reflection sensor, and the reflection area of the reflection sensor is located outside and close to the access slot 111. When part of the battery 100 extends out of the access slot 111 and enters the reflection area of the reflection sensor, the reflection sensor is triggered. The reflection sensor can be an infrared reflection sensor, a laser reflection sensor or an ultrasonic reflection sensor, etc.

[0176] When the battery 100 is in the set position, all of the battery 100 is accommodated in the battery accommodating groove, which can improve the limiting effect of the battery accommodating groove on the battery 100, and can improve the position stability of the battery 100, so as to be beneficial to improve the docking accuracy of the liquid injection mechanism 13 and the battery 100. Moreover, the detection device 14 judges whether the battery 100 is in the set position by detecting whether the battery 100 extends out of the access slot 111, realizes the automatic detection function, and improves the detection accuracy and efficiency.

[0177] In some embodiments of the present disclosure, as shown in FIGS. 4-7, the liquid injection device 1 further comprises a moving mechanism 15, the battery clamp 11 is arranged on the moving mechanism 15 and can move between the detection position, the adjustment position and the liquid injection position under the action of the moving mechanism 15. The detection device 14 detects the battery 100 in the battery clamp 11 at the detection position. In the case that at least one battery 100 is not in the set position, the moving mechanism 15 moves the battery clamp 11 to the adjustment position, so that the position adjustment mechanism 12 adjusts the battery 100. In the case that each battery 100 is in the set position, the moving mechanism 15 moves the battery clamp 11 to the liquid injection position, so that the liquid injection mechanism 13 injects electrolyte into the battery 100.

[0178] The moving mechanism 15 can be any mechanism capable of moving the position of the battery clamp 11. It can be a sliding module that drives the battery clamp 11 to change position by sliding along a fixed path, or a mechanical hand that moves the position by grabbing, of course, it can also be other mechanisms capable of moving the battery clamp 11, which will not be described here.

[0179] The moving mechanism 15 is used to transfer the battery 100 between the detection position, the adjustment position and the liquid injection position, so as to promote the subsequent position adjustment action or liquid injection action, and make the liquid injection operation proceed smoothly.

[0180] In some embodiments of the present disclosure, as shown in FIG. 4, the moving mechanism 15 comprises a moving carrier 151, a sliding guide rail 152, a sliding carrier plate 153 and a sliding driving mechanism. The sliding guide rail 152 is installed on the moving carrier 151, the sliding carrier plate 153 is slidingly connected to the sliding guide rail 152 along a first direction X intersecting the vertical direction Z, the sliding carrier plate 153 is used to carry the battery clamp 11, and the sliding driving mechanism is installed on the moving carrier 151 and is configured to drive the sliding carrier plate 153 to reciprocate in the first direction X, so as to drive the battery clamp 11 carried on the moving carrier 151 to move between the detection position, the adjustment position and the liquid injection position.

[0181] The sliding driving mechanism comprises but is not limited to a screw nut transmission mechanism, a ball screw mechanism, a linear cylinder or a linear motor, etc., as long as it is a mechanism capable of linearly driving the sliding carrier plate 153.

[0182] In some embodiments of the present disclosure, as shown in FIGS. 5 and 6, the liquid injection device 1 further comprises a liquid injection base 16, and at least part of the position adjustment mechanism 12 and at least part of the liquid injection mechanism 13 are respectively connected to opposite sides of the liquid injection base 16.

[0183] The liquid injection base 16 is a mounting base for mounting the position adjustment mechanism 12 and the liquid injection mechanism 13. The liquid injection base 16 can be any structure suitable for mounting the position adjustment mechanism 12 and the liquid injection mechanism 13, and can be but is not limited to a plate-shaped structure.

[0184] For example, at least part of the position adjustment mechanism 12 and at least part of the liquid injection mechanism 13 are respectively connected to opposite sides of the liquid injection base 16 along the first direction X.

[0185] The position adjustment mechanism 12 and the liquid injection mechanism 13 are both connected to the liquid injection base 16, which is conducive to compact structure. Moreover, at least part of the position adjustment mechanism 12 and at least part of the liquid injection mechanism 13 are respectively connected to opposite sides of the liquid injection base 16, so that the opposite sides of the liquid injection base 16 bear the weight, which is conducive to improving the stability of the liquid injection base 16.

[0186] In some embodiments of the present disclosure, as shown in FIG. 5, the position adjustment mechanism 12 comprises a pressing base 121 and a pressing structure 122. The pressing base 121 is installed on one side of the liquid injection base 16. The pressing structure 122 is arranged on the pressing base 121 and can be raised or lowered relative to the pressing base 121. The pressing structure 122 can press the battery 100 from top to bottom in the process of descending.

[0187] In this way, the function of the pressing structure 122 pressing the battery 100 is realized, so that the position of the battery 100 can be adjusted, and the docking accuracy of the liquid injection port of the battery 100 and the liquid injection mechanism 13 is improved.

[0188] In some embodiments of the present disclosure, the position adjusting mechanism 12 further comprises a pressing driving member 123, which is installed on the pressing base 121, and the output end of the pressing driving member 123 is connected to the pressing structure 122, and the pressing driving member 123 can drive the pressing structure 122 to rise or fall.

[0189] The pressing driving member 123 can be, but is not limited to, a linear cylinder or a linear motor, etc.

[0190] In some embodiments of the present disclosure, the pressing structure 122 comprises a pressing head mounting member 1221 and at least one pressing head 1222 connected to the pressing head mounting member 1221, the number of the pressing heads 1222 is the same as the number of the battery accommodating grooves of the battery clamp 11, the pressing head mounting member 1221 is connected to the output end of the pressing driving member 123, and when the pressing driving member 123 drives the pressing head mounting member 1221 to fall, the pressing head mounting member 1221 drives the pressing heads 1222 to fall, so that each of the pressing heads 1222 corresponds to each of the batteries 100 in the battery clamp 11.

[0191] The pressing head 1222 is made of an elastic material including but not limited to rubber, so that the pressing head 1222 elastically contacts the top cover of the battery 100, and the probability of damaging the battery 100 during the pressing process is reduced.

[0192] In some embodiments of the present disclosure, the liquid injection mechanism 13 comprises a liquid injection mounting seat 131 and a liquid injection unit 132, the liquid injection mounting seat 131 is installed on the other side of the liquid injection base 16 opposite to the pressing base 121, and the liquid injection mounting seat 131 can rise or fall relative to the liquid injection base 16; the liquid injection unit 132 is installed on the liquid injection mounting seat 131, the liquid injection unit 132 is configured to inject electrolyte into the battery 100 which is docked with the liquid injection unit 132; and the liquid injection unit 132 can be docked with the battery 100 located at a set position during the falling of the liquid injection mounting seat 131.

[0193] When each of the batteries 100 in the battery clamp 11 is located at a set position, the liquid injection mounting seat 131 drives the liquid injection unit 132 to fall until the liquid injection unit 132 is docked with the battery 100 located at a set position, and then the liquid injection unit 132 injects electrolyte into the battery 100 which is docked with the liquid injection unit 132.

[0194] In this way, the liquid injection mechanism 13 and the battery 100 are docked and electrolyte is injected into the battery 100. The position adjustment mechanism 12 is arranged so that each battery 100 is located at a set position, thereby improving the accuracy of the docking of the liquid injection unit 132 and the battery 100.

[0195] In some embodiments of the present disclosure, as shown in FIG. 6, the liquid injection mechanism 13 further comprises a docking driving member 133, which is mounted on the liquid injection base 16. The output end of the docking driving member 133 is connected to the liquid injection mounting base 131, and the docking driving member 133 can drive the liquid injection mounting base 131 to ascend or descend relative to the liquid injection base 16.

[0196] The docking driving member 133 can be, but is not limited to, a linear cylinder or a linear motor, etc.

[0197] In some embodiments of the present disclosure, among the liquid injection mounting base 131 and the liquid injection base 16, one is provided with a first sliding rail, and the other is provided with a first sliding block. The first sliding rail extends along the vertical direction Z, and the first sliding block is slidingly connected to the first sliding rail.

[0198] In this way, the stability of the ascending and descending of the liquid injection mounting base 131 is improved.

[0199] In some embodiments of the present disclosure, as shown in FIG. 4 and FIG. 6, the liquid injection unit 132 comprises a liquid inlet main pipe 1321, a liquid inlet pipe 1322, a negative pressure air pipe 1323, a liquid injection cup 1324, and a liquid outlet nozzle 1325. The inlet end of the liquid inlet pipe 1322 is connected to an electrolyte introduction pipe, and the outlet end is connected to the liquid inlet main pipe 1321. The inlet end of the negative pressure air pipe 1323 is connected to a vacuum pump, and the outlet end is connected to the liquid inlet main pipe 1321. The liquid inlet main pipe 1321 is connected to the inlet of the liquid injection cup 1324. The outlet of the liquid injection cup 1324 is connected to the liquid outlet nozzle 1325, which is used to dock the liquid injection port of the battery 100.

[0200] After the liquid outlet nozzle 1325 docks the liquid injection port of the battery 100, the vacuum pump is started to vacuum the inner cavity of the battery 100. After the vacuuming is completed, electrolyte is injected into the liquid injection cup 1324, and the electrolyte is injected into the battery 100 through the liquid outlet nozzle 1325, thereby completing the liquid injection.

[0201] For example, the negative pressure air pipe 1323 is provided with a vacuum valve 1326, the liquid inlet pipe 1322 is provided with a liquid inlet valve 1327, and the liquid outlet nozzle 1325 and the liquid injection cup 1324 are connected by a liquid injection valve 1328. The vacuum valve 1326, the liquid inlet valve 1327, and the liquid injection valve 1328 respectively control the conduction or non-conduction of the respective pipelines.

[0202] In some embodiments of the present disclosure, as shown in FIG. 7, the pressing base 121 has a mounting space therein, the liquid injection mechanism 13 further comprises a residual liquid receiving driving member 137 and a residual liquid receiving box 134, the residual liquid receiving driving member 137 is mounted in the mounting space of the pressing base 121, the residual liquid receiving box 134 is connected to the output end of the residual liquid receiving driving member 137, and the residual liquid receiving box 134 is capable of moving between a residual liquid receiving position and a stowed position under the driving of the residual liquid receiving driving member 137, the residual liquid receiving box 134 at the residual liquid receiving position is located below the liquid outlet nozzle 1325 of the liquid injection unit 132 and is capable of being docked with the liquid outlet nozzle 1325 of the liquid injection unit 132 to receive the residual liquid flowing out of the liquid injection unit 132, and the residual liquid receiving box 134 at the stowed position is misaligned with the liquid outlet nozzle in the vertical direction Z.

[0203] For example, the residual liquid receiving position and the stowed position are spaced apart from each other in the first direction X, and the residual liquid receiving driving member 137 is configured to drive the residual liquid receiving box 134 to reciprocate along the first direction X intersecting the vertical direction Z.

[0204] After the liquid injection unit 132 finishes injecting the liquid into the battery 100, the liquid injection unit 132 is raised, the residual liquid receiving driving member 137 drives the residual liquid receiving box 134 to move to the residual liquid receiving position, so that the residual liquid inlet of the residual liquid receiving box 134 is directly opposite the liquid outlet nozzle 1325 of the liquid injection unit 132 in the vertical direction Z, and the residual liquid receiving box 134 is located below the liquid outlet nozzle of the liquid injection unit 132, then the liquid injection unit 132 is lowered until the liquid outlet nozzle of the liquid injection unit 132 is docked with the residual liquid inlet of the residual liquid receiving box 134, at this time, the residual liquid flowing out of the liquid outlet nozzle of the liquid injection unit 132 can enter the residual liquid receiving box 134. After the residual liquid flows out, the liquid injection unit 132 is raised, and the residual liquid receiving driving member 137 drives the residual liquid receiving box 134 to move to the stowed position to leave space for the liquid injection unit 132 to rise and fall, so as to facilitate the docking of the liquid injection unit 132 and the battery 100 in the next time.

[0205] In this way, the collection of residual liquid after the liquid injection operation is realized, and the influence on the surrounding environment is reduced. Moreover, the residual liquid receiving driving member 137 is mounted in the mounting space of the pressing base 121, so that the residual liquid receiving driving member 137 and the pressing structure 122 are jointly mounted on the pressing base 121, and the mounting space of the pressing base 121 accommodates the residual liquid receiving driving member 137, thereby reducing the space occupation and making the structure compact.

[0206] In some embodiments of the present disclosure, the liquid injection unit 132 further comprises a positive pressure air pipe, one end of the positive pressure air pipe is connected to the liquid injection cup 1324, and the other end of the positive pressure air pipe is connected to the air pump.

[0207] After the liquid outlet of the liquid injection unit 132 is connected with the liquid inlet of the residual liquid receiving box 134, the air pump is started, and air is blown into the liquid injection cup 1324 through the positive pressure air pipe, and the air enters the residual liquid receiving box 134 through the liquid outlet 1325, and under the blowing of the air, the residual liquid on the wall of the liquid injection cup 1324 is blown into the residual liquid receiving box 134, thereby improving the completeness of the residual liquid discharge.

[0208] As shown in FIG. 7, the residual liquid receiving box 134 is connected with an air outlet pipe 135 and a liquid outlet pipe 136, the other end of the air outlet pipe 135 away from the residual liquid receiving box 134 is connected with an air extractor, the air extractor extracts the air flow in the residual liquid receiving box 134, so that the air flow is discharged through the air outlet pipe 135, and the residual liquid is discharged through the liquid outlet pipe 136.

[0209] As shown in FIG. 8, in some embodiments of the present disclosure, the liquid injection cup 1324 of the liquid injection unit 132 includes a cup body 13241, a first end cover 13242 and a second end cover 13243, the cup body 13241 is provided with a containing cavity and two openings, the two openings are respectively arranged at opposite ends of the cup body 13241, the first end cover 13242 and the second end cover 13243 are connected to the cup body 13241 by fasteners such as bolts and respectively cover the two openings, and a sealing ring is clamped between the first end cover 13242 and the end face of one end of the cup body 13241 and between the second end cover 13243 and the end face of the other end of the cup body 13241.

[0210] In this way, the sealing performance of the liquid injection cup 1324 can be improved, and the assembly operation of the liquid injection cup 1324 is simple, reliable and has low assembly requirements.

[0211] In some embodiments of the present disclosure, the liquid injection device 1 is provided with at least two liquid injection devices 1, the at least two liquid injection devices 1 are arranged in sequence along a second direction Y intersecting the first direction X, and each liquid injection device 1 operates independently of each other. In this way, the efficiency of injecting liquid into the battery 100 can be improved.

[0212] As shown in FIGS. 1 to 3, the liquid injection device 1 is provided with five liquid injection devices 1, and the five liquid injection devices 1 are arranged in sequence along the second direction Y.

[0213] As shown in FIGS. 9 and 10, in some embodiments of the present disclosure, the battery clamp 11 includes an outer box 112 and at least one partition plate 113 arranged in the outer box 112, and the partition plate 113 divides the space in the outer box 112 into at least two battery containing grooves.

[0214] In this way, the structure of the battery clamp 11 is simple and the cost is low.

[0215] In some embodiments of the present disclosure, as shown in FIGS. 5-7 and 10, the bottom wall of the battery clamp 11 opposite to the access slot 111 is provided with a jacking opening 114, and the liquid injection device 1 further comprises a jacking mechanism 17, which comprises a jacking rod 171 configured to reciprocate along the vertical direction Z relative to the battery clamp 11, and the jacking rod 171 can extend into the battery accommodating groove through the jacking opening 114 during the lifting of the jacking rod 171, so as to lift the battery 100 in the battery accommodating groove, and at least part of the battery 100 extends out of the access slot 111.

[0216] In this way, after the battery 100 completes the liquid injection operation, at least part of the battery 100 extends out of the access slot 111, which facilitates the transfer of the battery 100 to the next device.

[0217] In some embodiments of the present disclosure, as shown in FIG. 7, the jacking mechanism 17 further comprises a jacking rod mounting frame 172 and a jacking drive 173, the jacking rod mounting frame 172 is slidingly connected to the moving carrier 151 along the vertical direction Z, the jacking drive 173 is installed on the moving carrier 151, the jacking rod 171 is connected to the jacking rod mounting frame 172 and extends along the vertical direction Z, the jacking rod mounting frame 172 is connected to the output end of the jacking drive 173 and can reciprocate along the vertical direction Z under the driving of the jacking drive 173, thereby driving the jacking rod 171 to reciprocate along the vertical direction Z. During the lifting of the jacking rod 171, the jacking rod 171 can extend into the battery accommodating groove through the jacking opening 114, so as to lift the battery 100 in the battery accommodating groove, and at least part of the battery 100 extends out of the access slot 111.

[0218] For example, the jacking drive 173 includes but is not limited to a linear cylinder or a linear motor.

[0219] In some embodiments of the present disclosure, as shown in FIG. 11, the liquid injection device further comprises a nail driving and conveying mechanism 21, a pre-pressing nail mechanism 22, and a full-pressing nail mechanism 23. The nail driving and conveying mechanism 21 is configured to convey the battery 100 after the completion of the liquid injection operation, and can convey the battery 100 to the pre-pressing nail station and the full-pressing nail station in sequence. The pre-pressing nail mechanism 22 is configured to pre-press a sealing nail into the liquid injection port of the battery 100 located at the pre-pressing nail station. The full-pressing nail mechanism 23 is configured to press the sealing nail of the battery 100 located at the full-pressing nail station, so that the sealing nail is installed in place.

[0220] The nail driving and conveying mechanism 21 can be any conveying mechanism suitable for conveying the battery 100, and can be but is not limited to a belt conveyor, a roller conveyor, or a chain conveyor, etc.

[0221] The pre-nailing mechanism 22 is a mechanism for pre-nailing the sealing nail into the liquid injection port of the battery 100. The pre-nailing mechanism 22 can adopt any mechanism capable of pre-nailing the sealing nail in the prior art, and the specific structure and working principle can refer to the prior art, which will not be described here.

[0222] The full-nailing mechanism 23 is a mechanism for pressing the sealing nail of the battery and installing the sealing nail in place. The full-nailing mechanism 23 can adopt any mechanism capable of full-nailing the sealing nail in the prior art, and the specific structure and working principle can refer to the prior art, which will not be described here.

[0223] The nailing conveying mechanism 21 conveys the battery 100 after completing the liquid injection operation to the pre-nailing station, the pre-nailing mechanism 22 pre-nails the sealing nail into the liquid injection port of the battery 100 conveyed to the pre-nailing station, then the nailing conveying mechanism 21 conveys the battery 100 with the pre-nailing sealing nail to the full-nailing station, and the full-nailing mechanism 23 presses the sealing nail of the battery 100 conveyed to the full-nailing station to install the sealing nail in place, thereby completing the sealing of the liquid injection port.

[0224] In this way, the sealing of the liquid injection port of the battery 100 is realized, and the probability of battery 100 liquid leakage is reduced.

[0225] In some embodiments of the present disclosure, as shown in FIGS. 12 and 13, the nailing conveying mechanism 21 includes a conveying belt 211 configured to drive along a conveying direction, and at least two fixed blocks 214 arranged in sequence along the conveying direction and connected to the conveying belt 211. Adjacent fixed blocks 214 are used to limit the opposite sides of the battery 100, and the spacing between adjacent fixed blocks 214 can be adjusted.

[0226] The adjacent fixed blocks 214 limit the opposite sides of the battery 100, and drive the battery 100 to move when the conveying belt 211 drives. When the battery 100 needs to be pre-nailed or full-nailed, the conveying belt 211 stops driving. Since the adjacent fixed blocks 214 limit the opposite sides of the battery 100, the battery 100 can be positioned at the pre-nailing station or the full-nailing station, thereby enabling the pre-nailing mechanism 22 or the full-nailing mechanism 23 to pre-nail or full-nail the battery 100.

[0227] In this way, the nailing conveying mechanism 21 can convey the battery 100 to the pre-nailing station or the full-nailing station, and by changing the spacing between adjacent fixed blocks 214, different sizes of batteries 100 can be limited, thereby improving compatibility.

[0228] In some embodiments of the present disclosure, the conveying belt 211 comprises a first conveying belt 2111 and a second conveying belt 2112 arranged side by side along a direction perpendicular to the conveying direction, and two adjacent fixed blocks 214 are connected to the first conveying belt 2111 and the second conveying belt 2112 respectively, the first conveying belt 2111 and the second conveying belt 2112 are configured to be synchronously driven along the conveying direction to convey the battery, and the first conveying belt 2111 and the second conveying belt 2112 are configured to be relatively moved along the conveying direction to adjust the interval between the two adjacent fixed blocks 214.

[0229] The first conveying belt 2111 and the second conveying belt 2112 are synchronously driven to convey the battery 100, and when it is necessary to adjust the interval between the two adjacent fixed blocks 214, the first conveying belt 2111 and the second conveying belt 2112 are relatively moved to drive the two adjacent fixed blocks 214 to relatively move along the conveying direction, so as to change the interval between the two fixed blocks 214.

[0230] In this way, the function of adjusting the interval between the two adjacent fixed blocks 214 is realized, so as to be applicable to conveying batteries 100 of different sizes and improve the compatibility.

[0231] For example, the nailing conveying mechanism 21 further comprises a first conveying drive assembly and a second conveying drive assembly for driving the first conveying belt 2111 and the second conveying belt 2112 respectively, the first conveying drive assembly and the second conveying drive assembly are independently driven, and the first conveying drive assembly and the second conveying drive assembly drive the first conveying belt 2111 and the second conveying belt 2112 to be synchronously driven to convey the battery 100, and when the first conveying drive assembly and the second conveying drive assembly drive the first conveying belt 2111 and the second conveying belt 2112 to be driven at different speeds, the two adjacent fixed blocks 214 can be relatively moved to change the interval, and when the interval reaches a predetermined interval, the driving is stopped or changed to synchronous driving to keep the interval between the two adjacent fixed blocks 214, so as to limit the battery 100. The first conveying drive assembly and the second conveying drive assembly are structures capable of driving the conveying belt to be driven, and the specific structure can refer to the prior art, which will not be described here.

[0232] In some embodiments of the present disclosure, the conveying belt 211 further comprises a third conveying belt 2113 arranged on the side of the second conveying belt 2112 away from the first conveying belt 2111, the fixed block 214 connected to the first conveying belt 2111 is connected to the third conveying belt 2113, and the first conveying belt 2111 and the third conveying belt 2113 are synchronously driven.

[0233] In this way, the first conveying belt 2111, the second conveying belt 2112 and the third conveying belt 2113 are arranged in sequence, the second conveying belt 2112 is located at the middle position of the entire conveying belt 211, and connects the middle part of the battery 100, and the first conveying belt 2111 and the third conveying belt 2113 respectively connect the two edge parts of the battery 100, so that the stability of the connection of the fixing block 214 can be improved, and the reliability of the limiting of the battery 100 can be improved.

[0234] In some embodiments of the present disclosure, in a direction perpendicular to the conveying direction, the size of the second conveying belt 2112 is greater than the size of the first conveying belt 2111 and greater than the size of the third conveying belt 2113.

[0235] In this way, the stability of the connection of the second conveying belt 2112 and the fixing block 214 can be improved, and the reliability of the limiting of the battery 100 can be further improved.

[0236] In some embodiments of the present disclosure, as shown in FIGS. 12 and 13, the nailing conveying mechanism 21 further comprises a first positioning assembly 212 and a second positioning assembly 213, the first positioning assembly 212 and the second positioning assembly 213 are arranged on opposite sides of the conveying belt 211, and the first positioning assembly 212 and the second positioning assembly 213 are configured to respectively push the battery 100 from both sides in a direction perpendicular to the conveying direction of the battery 100, so as to limit the position of the battery 100.

[0237] In this way, by pushing the battery 100 from both sides in a direction perpendicular to the conveying direction through the first positioning assembly 212 and the second positioning assembly 213, the four directions of the battery 100 can be limited, and the battery 100 can be accurately positioned at the pre-nailing station and the full-nailing station, so that the smoothness of the liquid injection port sealing can be improved.

[0238] In some embodiments of the present disclosure, the first positioning assembly 212 comprises a first pushing member 2121, the first pushing member 2121 is provided with a limiting groove 2122, the limiting groove 2122 comprises a first pushing surface 2123 facing the second positioning assembly 213 and two limiting surfaces 2124 opposite along the conveying direction, and the first pushing member 2121 is configured to be movable towards the second positioning assembly 213, so that the limiting groove 2122 is clamped on the battery 100.

[0239] For example, the first positioning assembly 212 further comprises a first pushing driving member 2125, the first pushing driving member 2125 is installed on one side of the conveying belt 211, the output end of the first pushing driving member 2125 is connected to the first pushing member 2121, and the first pushing driving member 2125 can drive the first pushing member 2121 to move close to or away from the second positioning assembly 213. The first pushing driving member 2125 can be, but is not limited to, a linear air cylinder or a linear motor.

[0240] In this way, during the movement of the first pushing member 2121 towards the second positioning assembly 213, the first pushing member 2121 gradually approaches the battery 100 until the limiting groove 2122 of the first pushing member 2121 is engaged with the battery 100, so that the first abutting surface 2123 of the limiting groove 2122 abuts against the surface of the battery 100, and the two limiting surfaces 2124 are limited on the opposite sides of the battery 100 along the conveying direction, thereby more reliably limiting the position of the battery 100.

[0241] In some embodiments of the present disclosure, the second positioning assembly 213 comprises a clamping structure 2131, the clamping structure 2131 comprises a first chuck 2132 and a second chuck 2133, the first chuck 2132 and the second chuck 2133 are each provided with a clamping surface 2134 and a second abutting surface 2135, the clamping surfaces 2134 of the first chuck 2132 and the second chuck 2133 are opposite to each other along the conveying direction, and the second abutting surfaces 2135 are both towards the first pushing member 2121, the first chuck 2132 and the second chuck 2133 are configured to be capable of approaching or moving away from the first pushing member 2121, and capable of approaching or moving away from each other along the conveying direction.

[0242] For example, the clamping structure 2131 further comprises a clamping seat 2136, and the first chuck 2132 and the second chuck 2133 are respectively movably connected to the clamping seat 2136 along the conveying direction. In this way, by adjusting the positions of the first chuck 2132 and / or the second chuck 2133 along the conveying direction, the distance between the clamping surfaces 2134 of the first chuck 2132 and the second chuck 2133 can be changed, thereby realizing the clamping of the battery 100. For example, the first chuck 2132 and the second chuck 2133 are each provided with a strip-shaped hole with the length direction along the conveying direction, and the first chuck 2132 and the second chuck 2133 are respectively connected to the clamping seat 2136 through fasteners such as bolts.

[0243] For example, the second positioning assembly 213 further comprises a second pushing driving member 2137, the second pushing driving member 2137 is installed on the other side of the conveying belt 211, the output end of the second pushing driving member 2137 is connected to the clamping seat 2136, and the clamping seat 2136 is capable of approaching or moving away from the first pushing member 2121 under the action of the second pushing driving member 2137, thereby driving the first chuck 2132 and the second chuck 2133 to be capable of approaching or moving away from the first pushing member 2121, and the second pushing driving member 2137 can be but is not limited to a linear air cylinder or a linear motor.

[0244] During the process of the first clamp 2132 and the second clamp 2133 approaching the first pushing member 2121, the first clamp 2132 and the second clamp 2133 gradually approach the battery 100 until the second pushing surface 2135 of the first clamp 2132 and the second clamp 2133 abuts against the battery 100, and then the first clamp 2132 and the second clamp 2133 approach each other until the clamping surfaces 2134 of the first clamp 2132 and the second clamp 2133 clamp the opposite two surfaces of the battery 100 respectively, so that the battery 100 is clamped by the clamping structure 2131, further improving the firmness of the positioning of the battery 100.

[0245] It can be understood that the two sides of the pre-staking station along the direction perpendicular to the conveying direction are respectively provided with the first positioning assembly 212 and the second positioning assembly 213, so that the battery 100 can be positioned at the pre-staking station; the two sides of the full-staking station along the direction perpendicular to the conveying direction are respectively provided with the first positioning assembly 212 and the second positioning assembly 213, so that the battery 100 can be positioned at the full-staking station.

[0246] In some embodiments of the present disclosure, as shown in FIG. 11, the battery 100 can be conveyed to a detection station located downstream of the full-staking station by the nailing conveying mechanism 21, and the liquid injection equipment further comprises a sealing nail detection device 24, which is configured to detect whether the sealing nail of the battery located at the detection station is installed in place.

[0247] For example, the two sides of the detection station along the direction perpendicular to the conveying direction are respectively provided with the first positioning assembly 212 and the second positioning assembly 213, so that the battery 100 can be positioned at the detection station.

[0248] The sealing nail detection device 24 is configured to detect whether the installation of the sealing nail is qualified, so as to select the unqualified battery 100 in the subsequent process.

[0249] For example, the sealing nail detection device 24 comprises a CCD visual detection device 241, which photographs the battery 100, and compares the photographed image with the pre-stored image to obtain whether the photographed image is qualified, so as to select the unqualified product in the subsequent process.

[0250] In some embodiments of the present disclosure, the battery 100 can be conveyed to a cleaning station located downstream of the detection station by the nailing conveying mechanism 21, and the liquid injection equipment further comprises a cleaning mechanism 25, which is configured to clean the liquid injection port of the battery located at the cleaning station.

[0251] For example, the two sides of the cleaning station along the direction perpendicular to the conveying direction are respectively provided with the first positioning assembly 212 and the second positioning assembly 213, so that the battery 100 can be positioned at the cleaning station.

[0252] The cleaning mechanism 25 is arranged to clean the liquid injection port, thereby improving the cleanliness of the battery 100.

[0253] In some embodiments of the present disclosure, as shown in FIG. 14, the cleaning mechanism 25 comprises a cleaning liquid dripping mechanism 251, a cleaning cloth cutting mechanism 252, a wiping mechanism 253, and a lifting driving mechanism 254. The cleaning liquid dripping mechanism 251 is configured to drip cleaning liquid to the battery 100. The cleaning cloth cutting mechanism 252 is configured to cut a cleaning cloth piece from a cleaning cloth roll. The wiping mechanism 253 is configured to grab the cleaning cloth piece. The lifting driving mechanism 254 drives the wiping mechanism 253 to approach the battery 100, so that the cleaning cloth piece grabbed by the wiping mechanism 253 contacts the liquid injection port of the battery 100. The wiping mechanism 253 drives the cleaning cloth to rotate, thereby wiping the liquid injection port.

[0254] In some embodiments of the present disclosure, the wiping mechanism 253 comprises a wiping mounting frame 2533, a rotating driving member 2531, and a wiping head 2532. The wiping mounting frame 2533 is connected to the output end of the lifting driving mechanism 254. The rotating driving member 2531 is installed on the wiping mounting frame 2533. The wiping head 2532 is connected to the output end of the rotating driving member 2531 and can rotate under the driving of the rotating driving member 2531.

[0255] The wiping head 2532 contacts the battery 100 under the action of the lifting driving mechanism 254, and then rotates under the action of the rotating driving member 2531, thereby achieving wiping and cleaning of the battery 100. The lifting driving mechanism 254 includes but is not limited to a linear motor or a linear cylinder. The rotating driving member 2531 includes but is not limited to a rotating cylinder or a rotating motor.

[0256] In some embodiments of the present disclosure, as shown in FIGS. 1, 15-17, the liquid injection device further comprises a code scanning device 3, a front weighing device 4, and a rear weighing device 5. The code scanning device 3 is configured to receive the battery 100 and scan the code of the battery 100. The front weighing device 4 is located downstream of the code scanning device 3 and upstream of the liquid injection device 1. The front weighing device 4 is configured to weigh the battery 100. The rear weighing device 5 is located downstream of the liquid injection device 1 and upstream of the nail punching and conveying mechanism 21. The rear weighing device 5 is configured to weigh the battery 100 after the liquid injection operation is completed.

[0257] By measuring the weight of the battery 100 before and after the liquid injection, it can be inferred whether the weight of the battery 100 before the liquid injection is qualified and whether the weight of the battery 100 after the liquid injection is qualified, so as to screen out unqualified batteries 100.

[0258] In some embodiments of the present disclosure, as shown in FIG. 15, the incoming battery scanning device 3 comprises a scanning conveying mechanism 31, a scanning stop mechanism 32 and a first scanning gun 33, the scanning stop mechanism 32 and the first scanning gun 33 are arranged above the scanning conveying mechanism 31, the scanning conveying mechanism 31 is used for conveying the battery 100, and the scanning stop mechanism 32 is configured to stop the battery 100 directly below the first scanning gun 33.

[0259] During the conveying of the battery 100 by the scanning conveying mechanism 31, the battery 100 is stopped by the scanning stop mechanism 32, at this time, the battery 100 is directly below the first scanning gun 33, and the first scanning gun 33 scans the battery 100.

[0260] The scanning stop mechanism 32 comprises a stop mounting frame 321, a stop driving member 322 and a stop member 323, the stop mounting frame 321 is mounted on the scanning conveying mechanism 31, the stop driving member 322 is mounted on the stop mounting frame 321, the stop member 323 is connected to the output end of the stop driving member 322 and can reciprocate along the vertical direction Z under the driving of the stop driving member 322, so as to move between the stop position blocking the battery 100 and the avoiding position avoiding the battery 100. The stop driving member 322 can be, but is not limited to, a linear cylinder or a linear motor.

[0261] In some embodiments of the present disclosure, as shown in FIG. 16, the front weighing device 4 comprises a front conveying mechanism 41, a front stop mechanism 42 and a front weighing mechanism 43, the front stop mechanism 42 and the front weighing mechanism 43 are arranged on the front conveying mechanism 41, the front conveying mechanism 41 is used for conveying the battery 100, the front stop mechanism 42 is configured to stop the battery 100 so that the battery 100 is above the front weighing mechanism 43, and the carrying surface of the front conveying mechanism 41 carrying the battery 100 can be lowered relative to the front weighing mechanism 43, so that the battery 100 is lowered relative to the front weighing mechanism 43, so that the battery 100 is lowered to be carried on the front weighing mechanism 43, and then the front weighing mechanism 43 weighs the battery 100.

[0262] The specific structure of the front stop mechanism 42 is similar to that of the scanning stop mechanism 32, and the specific structure of the front stop mechanism 42 will not be repeated.

[0263] In some embodiments of the present disclosure, the front conveying mechanism 41 comprises a plurality of conveying rollers 411 arranged in sequence along the conveying direction, each of the plurality of conveying rollers 411 rotates in the same direction, so that the battery 100 placed on the plurality of conveying rollers 411 is conveyed along the conveying direction, and the plurality of conveying rollers 411 are configured to be lowered simultaneously. The front weighing mechanism 43 comprises a plurality of weighing sensors 431, when the battery 100 is conveyed by the front conveying mechanism 41, the weighing sensors 431 are located below the conveying rollers 411, the battery 100 is carried on the conveying rollers 411 and moves under the action of the conveying rollers 411, after the battery 100 is stopped by the front stopping mechanism 42, the plurality of conveying rollers 411 are lowered simultaneously, so that the plurality of weighing sensors 431 extend upward through the space between the conveying rollers 411, thereby contacting and carrying the battery 100, at this time, the weight of the battery 100 can be detected by the weighing sensors 431.

[0264] The plurality of conveying rollers 411 are connected to the roller lifting driving member 413 through the roller mounting frame 412, and reciprocate in the vertical direction Z under the driving of the roller lifting driving member 413, thereby realizing the relative movement with the weighing sensors 431 in the vertical direction Z.

[0265] In some embodiments of the present disclosure, as shown in FIG. 17, the rear weighing device 5 comprises a rear conveying mechanism 51, a rear stopping mechanism 52 and a rear weighing mechanism 53, the rear stopping mechanism 52 and the rear weighing mechanism 53 are both arranged on the rear conveying mechanism 51, the rear conveying mechanism 51 is used to convey the battery 100, the rear stopping mechanism 52 is configured to stop the battery 100 so that the battery 100 is above the rear weighing mechanism 53, the carrying surface of the rear conveying mechanism 51 that carries the battery 100 can be lowered relative to the rear weighing mechanism 53, so that the battery 100 is lowered relative to the rear weighing mechanism 53, thereby the battery 100 is lowered to be carried on the rear weighing mechanism 53, and then the rear weighing mechanism 53 weighs the battery 100.

[0266] The specific structure of the rear stopping mechanism 52 is similar to that of the code scanning stopping mechanism 32, and the specific structure of the rear stopping mechanism 52 is not described again. The specific structure of the rear weighing mechanism 53 is similar to that of the front weighing mechanism 43 of the front weighing device 4, and the specific structure of the rear weighing mechanism 53 is not described again.

[0267] In some embodiments of the present disclosure, the rear weighing device 5 further comprises a second code scanning gun 54, the second code scanning gun 54 is arranged on the rear conveying mechanism 51, and the second code scanning gun 54 is used to scan the code of the battery 100 stopped on the rear conveying mechanism 51. In this way, the rear weighing device 5 has the functions of weighing and code scanning.

[0268] In some embodiments of the present disclosure, as shown in FIGS. 1 and 19, the liquid injection device further comprises an incoming defective pull belt 10 configured to receive and transport the battery 100 that fails to pass the code scanning and the battery 100 that fails to pass the weighing.

[0269] The incoming defective pull belt 10 is used to output the battery 100 that fails to pass the test.

[0270] In some embodiments of the present disclosure, the incoming defective pull belt 10 is provided with a plurality of indicator lights of different colors to indicate the type of failure, for example, by using red light, green light and yellow light to indicate the battery 100 that fails to pass the weighing, the battery 100 that fails to pass the weighing and the battery 100 that fails to pass the code scanning, respectively, so as to facilitate the classification and recycling of the battery 100 that fails to pass the test, thereby facilitating the subsequent repair and reuse.

[0271] In some embodiments of the present disclosure, as shown in FIGS. 19 to 22, the liquid injection device further comprises a liquid injection loading and unloading manipulator 6, a first transfer device 7, a second transfer device 8 and a nailing transfer manipulator 9. The liquid injection loading and unloading manipulator 6 is located downstream of the front weighing device 4 and is configured to transfer the battery 100 that passes the code scanning and the weighing to the battery clamp 11 of the liquid injection device 1 and to remove the battery 100 after the liquid injection operation. The first transfer device 7 is located downstream of the liquid injection device 1 and upstream of the rear weighing device 5 and is configured to receive the battery 100 transferred by the liquid injection loading and unloading manipulator 6 and to transport the battery 100 to the rear weighing device 5. The second transfer device 8 is located downstream of the rear weighing device 5 and upstream of the nailing transport mechanism 21 and is configured to receive and transport the battery 100 from the rear weighing device 5. The nailing transfer manipulator 9 is located downstream of the second transfer device 8 and upstream of the nailing transport mechanism 21 and is configured to transfer the battery 100 on the second transfer device 8 to the nailing transport mechanism 21.

[0272] In this way, the battery 100 is transferred or transferred between adjacent devices.

[0273] In some embodiments of the present disclosure, as shown in FIG. 19, the liquid injection feeding and discharging manipulator 6 includes a feeding and discharging mounting frame 61, a feeding horizontal movement driving module 62, a feeding lifting driving module 63, a feeding gripper 64, a discharging horizontal movement driving module 65, a discharging lifting driving module 66, and a discharging gripper 67. The feeding horizontal movement driving module 62 and the discharging horizontal movement driving module 65 are both mounted on the feeding and discharging mounting frame 61. The feeding lifting driving module 63 is connected to the output end of the feeding horizontal movement driving module 62 and can reciprocate along a second direction Y intersecting both the first direction X and the vertical direction Z under the driving of the feeding horizontal movement driving module 62. The feeding gripper 64 is connected to the output end of the feeding lifting driving module 63 and can reciprocate along the vertical direction Z under the driving of the feeding lifting driving module 63. The feeding gripper 64 is used to grab the battery 100. The discharging lifting driving module 66 is connected to the output end of the discharging horizontal movement driving module 65 and can reciprocate along the second direction Y intersecting both the first direction X and the vertical direction Z under the driving of the discharging horizontal movement driving module 65. The discharging gripper 67 is connected to the output end of the discharging lifting driving module 66 and can reciprocate along the vertical direction Z under the driving of the discharging lifting driving module 66. The discharging gripper 67 is used to grab the battery 100.

[0274] For example, the feeding gripper 64 and the discharging gripper 67 can be, but are not limited to, gripper cylinders.

[0275] In this way, the feeding gripper 64 can grab the battery 100 output by the front weighing device 4 and put the battery passing the code scanning and weighing into the battery containing groove through the inlet and outlet slots 111 of the battery clamp 11 located at the detection position. The discharging gripper 67 can take out the battery 100 completing the liquid injection operation from the battery clamp 11 located at the detection position and transfer it to the first transfer device 7, realizing the feeding and discharging of the liquid injection device 1.

[0276] For example, the first transfer device 7 includes a conveying mechanism, which can receive the transferred battery 100 and convey the battery 100 to the rear weighing device 5.

[0277] For example, the second transfer device 8 includes a conveying mechanism and a stopping mechanism, which can receive the transferred battery 100 and convey the battery 100, and can also fix the position of the battery 100 by blocking to facilitate the transfer of the battery 100 by the nailing transfer manipulator 9.

[0278] As shown in FIG. 22, the nail feeding transfer manipulator 9 includes a transfer mounting frame 91, a transfer horizontal movement driving module 92, a transfer vertical movement driving module 93, and a transfer gripper 94. The transfer horizontal movement driving module 92 is mounted on the transfer mounting frame 91. The transfer vertical movement driving module 93 is connected to the output end of the transfer horizontal movement driving module 92 and can reciprocate along the second direction Y under the driving of the transfer horizontal movement driving module 92. The transfer gripper 94 is connected to the output end of the transfer vertical movement driving module 93 and can reciprocate along the vertical direction Z under the driving of the transfer vertical movement driving module 93. The transfer gripper 94 can grasp the battery 100. As an example, the transfer gripper 94 can be a gripper cylinder, but is not limited thereto.

[0279] As shown in FIGS. 1, 23-25, a downstream of the nail feeding conveying mechanism 21 is provided with a feeding manipulator 60. The feeding manipulator 60 is provided with a feeding buffer matching pull belt 20, a feeding pull belt 30, and a feeding defective pull belt 40 on the side of the feeding manipulator 60. The feeding manipulator 60 can grasp the battery 100 from the feeding grasping position of the nail feeding conveying mechanism 21 and transfer the battery 100 to the feeding buffer matching pull belt 20, the feeding pull belt 30, or the feeding defective pull belt 40 according to the detection structure described above.

[0280] The specific structure of the feeding manipulator 60 is similar to that of the nail feeding transfer manipulator 9, and will not be described here again. The specific structure of the feeding buffer matching pull belt 20, the feeding pull belt 30, and the feeding defective pull belt 40 can refer to the prior art, and will not be described here again.

[0281] As shown in FIGS. 1, 15, and 26, an upstream of the incoming battery code scanning device 3 is provided with an incoming battery variable-distance pull belt 50. The incoming battery variable-distance pull belt 50 can adjust the position of the battery 100 along the direction perpendicular to the conveying direction of the incoming battery variable-distance pull belt 50, so that the battery 100 can be adjusted to be aligned with each conveying channel in the incoming battery code scanning device 3, thereby enabling the battery 100 to be conveyed into the conveying channel aligned therewith.

[0282] As shown in FIGS. 15 and 26, the incoming battery variable-distance pull belt 50 has two incoming battery stations, and the incoming battery code scanning device 3 has four conveying channels. The incoming battery variable-distance pull belt 50 can input the battery 100 into each of the four conveying channels by adjusting the positions of the two incoming battery stations.

[0283] The specific structure of the incoming battery variable-distance pull belt 50 can refer to the prior art, and will not be described here again.

[0284] In some embodiments of the present disclosure, as shown in FIG. 1, the incoming variable-length pull belt 50 conveys the battery 100 along the first direction X to the incoming code scanning device 3, the incoming code scanning device 3 conveys the battery 100 along the first direction X to the front weighing device 4, the incoming defective pull belt 10 is located at one side of the front weighing device 4 along the second direction Y, the liquid injection device 1 is located at one side of the incoming defective pull belt 10 along the second direction Y and away from the front weighing device 4, the liquid injection up-and-down transfer robot 6 transfers the unqualified battery 100 from the output end of the front weighing device 4 to the incoming defective pull belt 10, the liquid injection up-and-down transfer robot 6 transfers the qualified battery 100 from the output end of the front weighing device 4 to the battery clamp 11 of the liquid injection device 1, the battery 100 after being injected with electrolyte by the liquid injection device 1 is transferred from the battery clamp 11 to the first transfer device 7 by the liquid injection up-and-down transfer robot 6, the first transfer device 7 conveys the battery 100 along the first direction X to the rear weighing device 5, the rear weighing device 5 conveys the battery 100 along the first direction X to the second transfer device 8, the nail-punching transfer robot 9 transfers the battery 100 from the second transfer device 8 to the upper end of the nail-punching conveying mechanism 21 along the second direction Y, the nail-punching conveying mechanism 21 conveys the battery 100 along the second direction Y, and the lower transfer robot 60 transfers the battery 100 from the lower end of the nail-punching conveying mechanism 21 to the lower storage matching pull belt 20, the lower pull belt 30 or the lower defective pull belt 40.

[0285] In this way, the layout of each mechanism of the entire liquid injection equipment is reasonable and the occupied space is small by limiting the conveying direction of each device.

[0286] FIG. 27 is a top view of a battery production line according to some embodiments of the present disclosure.

[0287] The second aspect of the present disclosure provides a battery production line, as shown in FIG. 27, which comprises a battery casing device 1000 and the liquid injection equipment according to the first aspect, the battery casing device 1000 is configured to put the bare battery core into the shell to form the battery 100, and the liquid injection equipment is arranged downstream of the battery casing device 1000.

[0288] Since the battery production line comprises the liquid injection equipment, the battery production line has all the beneficial effects of the liquid injection equipment, and thus the battery production line can improve the accuracy of the butt joint when the battery is injected with electrolyte, thereby improving the yield of the battery.

[0289] FIG. 28 is a first flowchart of the liquid injection method according to some embodiments of the present disclosure; FIG. 29 is a second flowchart of the liquid injection method according to some embodiments of the present disclosure; FIG. 30 is a third flowchart of the liquid injection method according to some embodiments of the present disclosure; FIG. 31 is a fourth flowchart of the liquid injection method according to some embodiments of the present disclosure; FIG. 32 is a fifth flowchart of the liquid injection method according to some embodiments of the present disclosure; and FIG. 33 is a sixth flowchart of the liquid injection method according to some embodiments of the present disclosure.

[0290] The third aspect of the present disclosure provides a liquid injection method using a liquid injection device, the liquid injection device comprising a liquid injection apparatus 1, the liquid injection apparatus 1 comprising a battery clamp 11, a position adjustment mechanism 12 and a liquid injection mechanism 13, the battery clamp 11 being provided with at least one battery accommodating groove, the battery accommodating groove having a set position therein;

[0291] As shown in FIG. 28, the liquid injection method comprises:

[0292] S100, a discharging step of discharging a battery into the battery accommodating groove of the battery clamp;

[0293] S300, a position adjustment step of adjusting the battery that has been discharged into the battery accommodating groove and is not located at the set position to the set position by the position adjustment mechanism;

[0294] S400, a liquid injection step of abutting the liquid injection port of the battery located at the set position by the liquid injection mechanism and injecting electrolyte into the battery.

[0295] When the liquid injection method according to the embodiments of the present disclosure is used to inject electrolyte into the battery, the battery 100 is first discharged into the battery accommodating groove of the battery clamp 11, and the position adjustment mechanism 12 is used to adjust the position of the battery 100 that is not located at the set position, so that the battery 100 is moved to the set position. Since the position of the battery 100 is corrected, the liquid injection mechanism 13 can be accurately abutted to the liquid injection port of the battery 100, thereby improving the accuracy of the abutment between the liquid injection mechanism 13 and the liquid injection port of the battery 100.

[0296] In some embodiments of the present disclosure, the liquid injection apparatus 1 further comprises a detection apparatus 14. As shown in FIG. 29, the liquid injection method further comprises, after the discharging step S100:

[0297] S200, a detection step of detecting whether the batteries that have been discharged into the battery accommodating grooves are all located at the set positions by the detection apparatus.

[0298] In the case where at least one battery is not located at the set position, the position adjustment step S300 is performed, and in the case where all the batteries are located at the set positions, the liquid injection step S400 is performed.

[0299] By detecting by the detecting device 14, it can be determined whether the battery 100 placed in the battery clamp 11 needs to be adjusted in position, and the position adjustment mechanism 12 is used when needed, and is not used when not needed, so that automatic detection is realized, the accuracy and efficiency of detection are improved, and some useless work of the position adjustment mechanism 12 can be saved, and the work efficiency of battery liquid injection is improved.

[0300] In some embodiments of the present disclosure, the upper part of the battery accommodating groove is provided with an access slot 111. In the position adjustment step S300, the position adjustment mechanism 12 presses the battery 100 from top to bottom, so that the battery 100 not located at the set position is moved to the set position.

[0301] The access slot 111 is arranged at the upper part of the battery accommodating groove, so that the insertion direction of the battery 100 is from top to bottom, that is, the battery 100 needs to be inserted into the battery accommodating groove from top to bottom. In this case, after the battery 100 is inserted into the access slot 111 from top to bottom, the battery 100 can be released, and the battery 100 will automatically move downward under the action of gravity and continue to enter the battery accommodating groove, so that the pushing action of continuing to push the battery 100 into the battery accommodating groove can be saved, which is beneficial to improve the work efficiency.

[0302] In some embodiments of the present disclosure, the liquid injection device 1 further comprises a moving mechanism 15, and the battery clamp 11 is arranged on the moving mechanism 15 and can move between the detection position, the adjustment position and the liquid injection position under the action of the moving mechanism 15.

[0303] As shown in FIG. 30, the position adjustment step S300 comprises:

[0304] S301, adjustment to position step: the moving mechanism moves the battery clamp from the detection position to the adjustment position;

[0305] S302, adjustment execution step: the position adjustment mechanism adjusts the battery not located at the set position to the set position;

[0306] The liquid injection step S400 comprises:

[0307] S401, liquid injection to position step: the moving mechanism moves the battery clamp to the liquid injection position;

[0308] S402, liquid injection execution step: the liquid injection mechanism connects the liquid injection port of the battery, and injects electrolyte into the battery.

[0309] The moving mechanism 15 is used to transfer the battery 100 between the detection position, the adjustment position and the liquid injection position, so as to promote the subsequent adjustment execution step or liquid injection execution step, so that the liquid injection work can be carried out smoothly.

[0310] In some embodiments of the present disclosure, the liquid injection device further comprises a nail delivery mechanism 21, a pre-pressing nail mechanism 22, and a full-pressing nail mechanism 23. As shown in FIG. 31, the liquid injection method further comprises, after the liquid injection step S400:

[0311] S501, a pre-pressing nail position step, the nail delivery mechanism delivers the battery that has completed the liquid injection step to a pre-pressing nail position;

[0312] S502, a pre-pressing nail step, the pre-pressing nail mechanism presses a sealing nail into the liquid injection port of the battery located at the pre-pressing nail position;

[0313] S503, a full-pressing nail position step, the nail delivery mechanism delivers the battery that has completed the pre-pressing nail step to a full-pressing nail position;

[0314] S504, a full-pressing nail step, the full-pressing nail mechanism presses the sealing nail of the battery located at the full-pressing nail position, so that the sealing nail is installed in place.

[0315] The nail delivery mechanism 21 delivers the battery 100 that has completed the liquid injection step S400 to the pre-pressing nail position first, the pre-pressing nail mechanism 22 presses a sealing nail into the liquid injection port of the battery 100 that has been delivered to the pre-pressing nail position, then the nail delivery mechanism 21 delivers the battery 100 with the sealing nail pressed into the full-pressing nail position, and the full-pressing nail mechanism 23 presses the sealing nail of the battery 100 that has been delivered to the full-pressing nail position, so that the sealing nail is installed in place, thereby completing the sealing of the liquid injection port. In this way, the sealing of the liquid injection port of the battery 100 is achieved, and the probability of liquid leakage of the battery 100 is reduced.

[0316] In some embodiments of the present disclosure, the liquid injection device further comprises a sealing nail detection device 24 and a cleaning mechanism 25. As shown in FIG. 32, the liquid injection method further comprises, after the full-pressing nail step S504:

[0317] S601, a sealing detection position step, the nail delivery mechanism delivers the battery that has completed the full-pressing nail step to a sealing detection position;

[0318] S602, a sealing nail detection step, the sealing nail detection device detects whether the sealing nail of the battery located at the sealing detection position is installed in place;

[0319] S603, a cleaning position step, the nail delivery mechanism delivers the battery that has completed the sealing nail detection step to a cleaning position;

[0320] S604, a cleaning step, the cleaning mechanism cleans the liquid injection port of the battery located at the cleaning position.

[0321] In this way, by detecting whether the installation of the sealing nail is qualified, it is convenient to select unqualified products subsequently. By cleaning the liquid injection port, the cleanliness of the battery 100 is improved.

[0322] In some embodiments of the present disclosure, the liquid injection device further comprises a raw material scanning device 3, a front weighing device 4, and a rear weighing device 5. As shown in FIG. 33, the liquid injection method further comprises the following steps before the raw material feeding step S100:

[0323] S001, raw material scanning step: the raw material scanning device receives the battery and scans the battery;

[0324] S002, front weighing step: the front weighing device receives the battery that has completed the raw material scanning step and weighs the battery;

[0325] The liquid injection method further comprises the following steps between the liquid injection step S400 and the pre-pressing step S501:

[0326] S500, rear weighing step: the rear weighing device receives the battery that has completed the liquid injection step and weighs the battery.

[0327] By measuring the weight of the battery 100 before and after liquid injection, it can be inferred whether the weight of the battery 100 before liquid injection is qualified and whether the weight of the battery 100 after liquid injection is qualified, so as to screen out unqualified batteries 100.

[0328] Next, specific examples of some embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0329] As a specific example, the liquid injection device adopts a linear layout, including a feeding butt joint pull belt (raw material variable pitch pull belt 50), a front scanning device (raw material scanning device 3), a front weighing device (front weighing device 4), an upper and lower material mechanical hand (liquid injection upper and lower material mechanical hand 6), a liquid injection module (liquid injection device 1), a defective pull belt (raw material defective pull belt 10), a rear scanning and weighing device (rear weighing device 5), a transfer mechanical hand (first transfer device 7), a nail pulling belt (nail pulling conveying mechanism 21), a glue pressing nail device (pre-pressing nail mechanism 22 and full-pressing nail mechanism 23), and a wiping device (cleaning mechanism 25).

[0330] When using the liquid injection setting liquid, the battery is pulled into the liquid injection equipment by the upper material butt joint, and sequentially passes through the front code scanning device to scan the code, and the front weighing device bears the weight to reach the upper material station; the upper material manipulator (upper material clamp jaw 64) grabs the battery, when there is a defective product, the defective battery is put into the defective pull belt, and under normal circumstances, the battery is put into the liquid injection clamp (battery clamp 11); after the liquid injection clamp loads the battery, it is moved into the liquid injection station (liquid injection unit 132) below by the transfer module (moving mechanism 15); the liquid injection station is lowered to vacuumize the battery, and then the liquid injection pump is ready to liquid into the cup body (liquid injection cup 1324) of the liquid injection station, after the liquid preparation is completed, the liquid injection valve (liquid injection valve 1328) is opened, the electrolyte flows into the battery for liquid injection; after the liquid injection is completed (the electrolyte completely enters the inside of the battery), the liquid injection clamp is moved out, and the lower material manipulator (lower material clamp jaw 67) starts to discharge; the battery after discharging passes through the rear code scanning and weighing device to scan the code and weigh, and then the transfer manipulator puts the battery into the nail punching pull belt, and the pre-pressing nail mechanism 22 and the full-pressing nail mechanism 23 press the glue nail to seal the liquid injection hole (liquid injection port); then the battery flows out after being wiped by the wiping device.

[0331] The upper and lower material manipulators adopt linear motor double-acting material loading and unloading, realize high-beat battery liquid injection, and the liquid injection equipment is fully automatic, has comprehensive functions, does not need manual intervention, reduces labor input, realizes 16 products per minute of single machine, and has high cost efficiency.

[0332] The above embodiments are only used to illustrate the technical solutions of the present disclosure, but not limit the same; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure, and they should be covered in the scope of the specification of the present disclosure. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. Industrial applicability

[0333] The present disclosure provides a liquid injection device capable of improving the accuracy of the liquid injection port of the battery, a battery production line and a liquid injection method. The position adjustment mechanism of the liquid injection device can adjust the position of the battery that is not located at the set position, so that the battery moves to the set position. Since the position of the battery is corrected, the liquid injection mechanism can be accurately docked to the liquid injection port of the battery, thereby improving the accuracy of the liquid injection mechanism and the liquid injection port of the battery. Moreover, the inlet and outlet slot is arranged at the upper part of the battery containing slot, so that the insertion direction of the battery is from top to bottom, that is, the battery needs to be loaded into the battery containing slot from top to bottom. In this case, after the battery is inserted into the inlet and outlet slot from top to bottom, the battery can be released, and the battery will automatically move downward under the action of gravity and continue to enter the battery containing slot. The pushing action of continuing to push the battery into the battery containing slot can be omitted, which is beneficial to improve the efficiency of the operation. In the case that the battery is stuck and cannot continue to move downward, resulting in the battery cannot be moved to the set position, the position adjustment mechanism can press the battery from top to bottom to push the battery to the set position, thereby realizing the adjustment of the position of the battery. This adjustment method is simple in action and high in adjustment efficiency.

Claims

1. A liquid injection apparatus, comprising a liquid injection device, the liquid injection device comprising: a battery holder provided with at least one battery accommodating slot, the battery accommodating slot having a set position therein; a position adjusting mechanism configured to adjust a battery that has been put into the battery accommodating slot and is not located at the set position to the set position; a liquid injection mechanism configured to connect to a liquid injection port of a battery located at the set position and perform a liquid injection operation of injecting electrolyte into the battery; an upper portion of the battery accommodating slot is provided with an access slot, and the position adjusting mechanism is configured to press the battery from top to bottom so that the battery moves to the set position in the battery accommodating slot.

2. The liquid infusing device of claim 1, wherein, The liquid injection device further comprises a detection device configured to detect whether the batteries that have been put into each of the battery accommodating slots are all located at the set positions, and in the case that at least one battery is not located at the set position, the position adjusting mechanism adjusts the battery not located at the set position to the set position.

3. The liquid infusing device of claim 2, wherein, In the case that all the batteries are accommodated in the battery accommodating slots, the batteries are located at the set positions, The detection device is arranged outside the access slot, and in the case that part of the battery extends out of the battery accommodating slot from the access slot, the detection device is triggered.

4. The liquid infusing device of claim 2 or 3, wherein, The liquid injection device further comprises a moving mechanism, the battery holder is arranged on the moving mechanism and can move between a detection position, an adjusting position and a liquid injection position under the action of the moving mechanism, The detection device detects the batteries in the battery holder located at the detection position, in the case that at least one battery is not located at the set position, the moving mechanism moves the battery holder to the adjusting position so that the position adjusting mechanism adjusts the battery, and in the case that all the batteries are located at the set positions, the moving mechanism moves the battery holder to the liquid injection position so that the liquid injection mechanism injects electrolyte into the battery.

5. The liquid infusing device of any one of claims 1 to 4, wherein, The liquid injection device further comprises a liquid injection base, at least part of the position adjusting mechanism and at least part of the liquid injection mechanism are arranged on opposite sides of the liquid injection base, respectively.

6. The liquid infusing device of claim 5, wherein, The position adjusting mechanism comprises: a pressing base frame mounted on one side of the liquid injection base; a pressing structure arranged on the pressing base frame and capable of rising or falling relative to the pressing base frame, the pressing structure being capable of pressing the battery from top to bottom during falling.

7. The liquid infusing device of claim 6, wherein, The liquid injection mechanism comprises: a liquid injection mounting seat mounted on the other side of the liquid injection base opposite to the pressing base frame and capable of rising or falling relative to the liquid injection base; a liquid injection unit mounted on the liquid injection mounting seat, the liquid injection unit being configured to inject electrolyte into the battery connected thereto; wherein the liquid injection mounting seat drives the liquid injection unit to connect to the battery located at the set position during falling.

8. The liquid infusing device of claim 7, wherein, The pressing base frame has a mounting space therein, The liquid injection mechanism further comprises: A residual liquid receiving drive is installed in the mounting space of the lower pressing base; A residual liquid receiving box is connected to the output end of the residual liquid receiving drive, and is capable of moving between a residual liquid receiving position and a stowed position under the drive of the residual liquid receiving drive. When in the residual liquid receiving position, the residual liquid receiving box is located below the liquid outlet nozzle of the liquid injection unit and is capable of being docked with the liquid outlet nozzle of the liquid injection unit to receive the residual liquid flowing out of the liquid injection unit. When in the stowed position, the residual liquid receiving box is misaligned with the liquid outlet nozzle of the liquid injection unit in the vertical direction.

9. The liquid infusing device of any one of claims 1 to 8, wherein, The battery clamp comprises an outer box and at least one partition plate arranged in the outer box, and the partition plate divides the space in the outer box into at least two battery accommodating slots.

10. The liquid infusing device of any one of claims 1 to 9, wherein, The liquid injection device further comprises: A nail driving and conveying mechanism is configured to convey the battery after the completion of the liquid injection operation, and is capable of conveying the battery to the pre-nail pressing station and the full-nail pressing station in sequence; A pre-nail pressing mechanism is configured to press the sealing nail into the liquid injection port of the battery located at the pre-nail pressing station; A full-nail pressing mechanism is configured to press the sealing nail of the battery located at the full-nail pressing station, so that the sealing nail is installed in place.

11. The liquid injection apparatus according to claim 10, wherein The nail driving and conveying mechanism comprises: A conveying belt is configured to drive in the conveying direction; At least two fixing blocks are arranged in sequence along the conveying direction and are connected to the conveying belt, and adjacent fixing blocks are used to limit the opposite sides of the battery, and the distance between adjacent fixing blocks is adjustable.

12. The liquid injection apparatus according to claim 11, wherein The conveying belt comprises a first conveying belt and a second conveying belt arranged side by side along a direction perpendicular to the conveying direction, and adjacent two fixing blocks are connected to the first conveying belt and the second conveying belt, respectively. The first conveying belt and the second conveying belt are configured to be synchronously driven in the conveying direction to convey the battery, The first conveying belt and the second conveying belt are also configured to be relatively movable in the conveying direction to adjust the distance between adjacent two fixing blocks.

13. The liquid infusing device of claim 12, wherein, The conveying belt further comprises a third conveying belt arranged on the side of the second conveying belt away from the first conveying belt, and the fixing block connected to the first conveying belt is connected to the third conveying belt. The first conveying belt and the third conveying belt are synchronously driven.

14. The liquid infusing device of any one of claims 11 to 13, wherein, The nail driving and conveying mechanism further comprises a first positioning assembly and a second positioning assembly arranged on opposite sides of the conveying belt, The first positioning assembly and the second positioning assembly are configured to respectively push the battery from both sides in a direction perpendicular to the conveying direction to define the position of the battery.

15. The liquid injection apparatus according to claim 14, wherein The first positioning assembly comprises a first pushing member provided with a limiting groove, and the limiting groove comprises a first pushing surface facing the second positioning assembly and two limiting surfaces opposite in the conveying direction. The first pushing member is configured to be movable towards the second positioning assembly so that the limiting groove is engaged with the battery.

16. The liquid infusing device of claim 15, wherein, The second positioning assembly comprises a clamping structure, the clamping structure comprises a first clamp head and a second clamp head, the first clamp head and the second clamp head are each provided with a clamping surface and a second pushing surface, the clamping surfaces of the first clamp head and the second clamp head are opposite to each other in the conveying direction, the second pushing surfaces are each directed towards the first pushing member, and the first clamp head and the second clamp head are configured to be capable of approaching or moving away from the first pushing member and approaching or moving away from each other in the conveying direction.

17. The liquid infusing device of any one of claims 10 to 15, wherein, The nailing conveying mechanism is also capable of conveying the battery to a detection station located downstream of the full-nailing station, The liquid injection device further comprises a sealing nail detection device configured to detect whether the sealing nail of the battery located at the detection station is installed in place.

18. The liquid infusing device of claim 17, wherein, The nailing conveying mechanism is also capable of conveying the battery to a cleaning station located downstream of the detection station, The liquid injection device further comprises a cleaning mechanism configured to clean the liquid injection port of the battery located at the cleaning station.

19. The liquid infusing device of any one of claims 10 to 18, wherein, The liquid injection device further comprises: a code scanning device configured to be capable of scanning the code of the battery; a front weighing device located downstream of the code scanning device and upstream of the liquid injection device, the front weighing device being configured to be capable of weighing the battery; a rear weighing device located downstream of the liquid injection device and upstream of the nailing conveying mechanism, the rear weighing device being configured to weigh the battery after the liquid injection operation is completed.

20. The liquid injection apparatus according to claim 19, wherein The liquid injection device further comprises a defective incoming belt, the defective incoming belt being configured to receive and convey the battery that fails to pass the code scanning and the battery that fails to pass the weighing.

21. The liquid injection apparatus according to claim 19 or 20, wherein The liquid injection device further comprises: a liquid injection loading and unloading manipulator located downstream of the front weighing device, the liquid injection loading and unloading manipulator being configured to transfer the battery that passes the code scanning and the weighing to the battery clamp of the liquid injection device and to move the battery after the liquid injection operation is completed out of the liquid injection device; a first transfer device located downstream of the liquid injection device and upstream of the rear weighing device, the first transfer device being configured to receive the battery transferred by the liquid injection loading and unloading manipulator and to convey the battery to the rear weighing device; a second transfer device located downstream of the rear weighing device and upstream of the nailing conveying mechanism, the second transfer device being configured to receive and convey the battery from the rear weighing device; a nailing transfer manipulator located downstream of the second transfer device and upstream of the nailing conveying mechanism, the nailing transfer manipulator being configured to transfer the battery on the second transfer device to the nailing conveying mechanism.

22. A battery production line, the battery production line comprising: a battery casing device configured to put a bare cell into a casing to form a battery; the liquid injection device according to any one of claims 1 to 21, the liquid injection device being located downstream of the battery casing device.

23. A liquid injection method using a liquid injection apparatus, the liquid injection apparatus comprising a liquid injection device, the liquid injection device comprising a battery holder, a position adjustment mechanism, and a liquid injection mechanism, the battery holder being provided with at least one battery accommodating slot, the battery accommodating slot having a set position therein, an upper portion of the battery accommodating slot being provided with an access slot, the position adjustment mechanism being configured to press a battery from top to bottom so that the battery is moved to the set position in the battery accommodating slot; the liquid injection method comprising: a battery feeding step of feeding a battery to the battery accommodating slot of the battery holder; a position adjustment step of adjusting a battery that has been fed to the battery accommodating slot and is not positioned at the set position to the set position by the position adjustment mechanism; a liquid injection step of abutting a liquid injection port of the battery positioned at the set position by the liquid injection mechanism and injecting an electrolyte into the battery.

24. The liquid casting method according to claim 23, wherein the liquid injection device further comprising a detection device; the liquid injection method further comprising, after the battery feeding step: a detection step of detecting whether the battery fed to each of the battery accommodating slots is positioned at each of the set positions by the detection device, in a case where it is detected that at least one battery is not positioned at the set position, proceeding to the position adjustment step, and in a case where it is detected that each battery is positioned at each of the set positions, proceeding to the liquid injection step.

25. The liquid casting method according to claim 24, wherein an upper portion of the battery accommodating slot is provided with an access slot; in the position adjustment step, the position adjustment mechanism presses the battery from top to bottom so that the battery not positioned at the set position is moved to the set position.

26. The liquid infusing method of claim 24 or 25, wherein, the liquid injection device further comprising a moving mechanism, the battery holder being provided in the moving mechanism and being movable between a detection position, an adjustment position, and a liquid injection position by the moving mechanism; the position adjustment step comprising: a position adjustment to position step of moving the battery holder from the detection position to the adjustment position by the moving mechanism; an adjustment execution step of adjusting the battery not positioned at the set position to the set position by the position adjustment mechanism; the liquid injection step comprising: a liquid injection to position step of moving the battery holder to the liquid injection position by the moving mechanism; a liquid injection execution step of abutting the liquid injection port of the battery by the liquid injection mechanism and injecting the electrolyte into the battery.

27. The liquid casting method according to any one of claims 23 to 26, wherein, the liquid injection apparatus further comprising a nail feeding mechanism, a pre-pressing nail mechanism, and a full-pressing nail mechanism; the liquid injection method further comprising, after the liquid injection step: a pre-pressing to position step of feeding the battery on which the liquid injection step has been completed to a pre-pressing nail station by the nail feeding mechanism; a pre-pressing nail step of pressing a sealing nail into the liquid injection port of the battery positioned at the pre-pressing nail station by the pre-pressing nail mechanism; a full-pressing to position step of feeding the battery on which the pre-pressing nail step has been completed to a full-pressing nail station by the nail feeding mechanism; a full-pressing nail step of pressing the sealing nail of the battery positioned at the full-pressing nail station by the full-pressing nail mechanism so that the sealing nail is installed in position.

28. The liquid casting method according to claim 27, wherein the liquid injection apparatus further comprising a sealing nail detection device and a cleaning mechanism; the liquid injection method further comprising, after the full-pressing nail step: a sealing detection to position step of feeding the battery on which the full-pressing nail step has been completed to a sealing detection station by the nail feeding mechanism; a sealing nail detection step, the sealing nail detection device detecting whether the sealing nail of the battery located in the sealing detection station is installed in place; a cleaning in place step, the nailing conveying mechanism conveying the battery that has completed the sealing nail detection step to a cleaning station; a cleaning step, the cleaning mechanism cleaning the liquid injection port of the battery located in the cleaning station.

29. The liquid casting method according to claim 28, wherein The liquid injection device further comprises an incoming material code scanning device, a front weighing device, and a rear weighing device. The liquid injection method further comprises, before the discharging step: an incoming material code scanning step, the incoming material code scanning device receiving the battery and scanning the code of the battery; a front weighing step, the front weighing device receiving the battery that has completed the incoming material code scanning step and weighing the battery; The liquid injection method further comprises, between the liquid injection step and the pre-pressing in place step: a rear weighing step, the rear weighing device receiving the battery that has completed the liquid injection step and weighing the battery.

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