Parallel battery liquid injection equipment

Abstract

The utility model relates to the technical field of battery liquid injection, in particular to parallel battery liquid injection equipment, which comprises a battery conveying mechanism, a middle variable pitch mechanism, a jig mechanism, a jig carrying mechanism and a liquid injection cavity mechanism, a plurality of liquid injection modules which are arranged in parallel are arranged on the linear cross beam in the length direction, the jig carrying mechanism comprises a supporting tray used for mounting a battery jig, and the first carrying manipulator can move in the length direction of the linear cross beam to transfer a battery of the middle variable-pitch mechanism to the supporting tray; the supporting tray moves to the position below the liquid injection cavity mechanism on the right side, and the liquid injection cavity mechanism descends to be connected with the supporting tray in a sealed mode and is matched with the battery jig on the supporting tray to conduct liquid injection operation; by integrating various technological processes and adjusting procedures, the machine is compact in structure, the production time is effectively saved, and the productivity is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery liquid injection, in particular to a parallel - type battery liquid injection device. Background Technique

[0002] A lithium - ion battery is a secondary battery (rechargeable battery). It mainly works by the movement of lithium ions between the positive electrode and the negative electrode. Lithium - ion batteries have the characteristics of large energy density, high average output voltage, small self - discharge, excellent cycle performance, fast charge - discharge, high output power, and long service life.

[0003] In the production process of lithium - ion batteries, liquid injection is a crucial process. The quality of liquid injection directly affects the yield of the batteries. To maximize the battery performance, secondary liquid injection is currently mostly used, that is: first, perform a primary liquid injection into the formed lithium - battery shell, and then age the battery after the primary liquid injection, so that the electrolyte infiltrates into the electrode sheets and participates in chemical reactions to achieve the conversion between chemical energy and electrical energy; after the conversion is completed, perform a secondary liquid injection on the battery. The secondary liquid injection is a process of electrolyte supplementation, and the sealing also needs to be considered during the secondary liquid injection.

[0004] Among them, the utility model with the application number CN202322483931.9 discloses a battery liquid injection device, which includes a turntable, a rotary driving member, a carrier mechanism, a liquid injection mechanism, and a liquid adding mechanism; the output end of the rotary driving member is connected to the turntable; the carrier mechanism is installed on the turntable, and the carrier mechanism is used to place the battery; the liquid injection mechanism is connected to the carrier mechanism, and the liquid injection mechanism includes a liquid injection nozzle. There is a liquid injection port on the battery. When the battery is placed on the carrier mechanism, the liquid injection nozzle is docked with the liquid injection port; the liquid adding mechanism is arranged above the liquid injection mechanism, and the liquid adding mechanism is used to add electrolyte to the liquid injection mechanism. The rotary driving member drives the turntable to rotate. When the liquid injection mechanism rotates at a high speed, under the action of centrifugal force, the electrolyte in the liquid injection mechanism is injected into the battery. The battery liquid injection speed is fast, which greatly improves the liquid injection speed of the battery, improves production capacity, and saves costs.

[0005] During the process of cell liquid injection, keeping the cell in a set positioning state and performing stable movement is a key step to ensure the accurate and rapid completion of the liquid injection process. However, the existing cell positioning and moving devices have the following problems: poor compatibility. Since the size of the cell positioning groove is fixed, it can only position cells of the same model and the same specification, and cannot position cells of other specifications. Content of the Utility Model

[0006] The purpose of the utility model is to provide a parallel - type battery liquid injection device aiming at the deficiencies of the existing technology.

[0007] To achieve the above - mentioned purpose, the technical solution of the utility model is as follows:

[0008] A parallel battery liquid injection device includes a battery conveying mechanism for advancing the conveyance of batteries, and also includes a liquid injection fixture and a conversion pitch-changing mechanism for transferring the batteries from the conveying mechanism to the liquid injection fixture; the conversion pitch-changing mechanism includes a plurality of transfer fixtures arranged at intervals, and also includes a pitch-changing drive mechanism for driving two adjacent transfer fixtures to move away from or close to each other; the liquid injection fixture includes a first clamping seat and a second clamping seat, the second clamping seat can elastically approach the first clamping seat, the first clamping seat is provided with a movable member, when the movable member moves towards one side of the first clamping seat, the second clamping seat can move away from the first clamping seat, and when the movable member moves towards the other side of the first clamping seat, the second clamping seat can elastically approach the first clamping seat.

[0009] Further: The pitch-changing drive mechanism includes a moving seat connected to the outermost transfer fixture, the moving seat can move along the moving direction of the transfer fixture, a connecting member is arranged between two adjacent transfer fixtures, and one or more of the transfer fixtures are installed with sliding members that can move along the length direction of the connecting member, and the connecting member is provided with a limiting structure for limiting the movement of the sliding members.

[0010] Further: The conversion pitch-changing mechanism also includes a guiding support member for guiding the movement of a plurality of transfer fixtures, the guiding support member includes a pitch-changing support plate, the pitch-changing support plate is provided with pitch-changing guide rails along the length direction, and the transfer fixture is installed with a pitch-changing sliding seat that is slidably matched with the pitch-changing guide rails.

[0011] Further: The connecting member includes a first connecting strip, an intermediate connecting strip and a second connecting strip; the intermediate connecting strip is located between the first connecting strip and the second connecting strip, and the length of the intermediate connecting strip is greater than the lengths of the first connecting strip and the second connecting strip; when two adjacent transfer fixtures approach each other, the first connecting strip and the second connecting strip approach each other, and the intermediate connecting strip can be respectively inserted into the first connecting strip and the second connecting strip.

[0012] Further: The transfer fixtures are divided into a first transfer fixture, a second transfer fixture, a third transfer fixture, a fourth transfer fixture, a fifth transfer fixture and a sixth transfer fixture arranged in sequence; the first connecting strip is installed between the first transfer fixture and the second transfer fixture; the second connecting strip is installed between the fifth transfer fixture and the sixth transfer fixture, the intermediate connecting strip is installed on the fourth transfer fixture, one end of the intermediate connecting strip is connected to the third transfer fixture, and the other end is connected to the fifth transfer fixture.

[0013] Further: The first connecting strip is formed with a first sliding groove along the length direction, the sliding member includes a first sliding block installed on the second transfer fixture and a second sliding block installed on the sixth transfer fixture, and the first sliding block is slidably matched with the first sliding groove; the second connecting strip is formed with a second sliding groove along the length direction, and the second sliding block is slidably matched with the second sliding groove.

[0014] Further: An elastic connecting member that contacts the movable member is provided between the first clamping seat and the second clamping seat. The elastic connecting member is elastically connected to the second clamping seat and always remains in contact with the movable member. When the movable member moves along the length direction of the first clamping seat, the elastic connecting member will approach or move away from the first clamping seat to drive the second clamping seat to move synchronously.

[0015] Further: The movable member includes a first wedge block that moves along the length direction of the first clamping seat. The elastic connecting member includes a driving plate disposed outside the first clamping seat. The driving plate will approach the first clamping seat under elastic action. The elastic connecting member further includes a rolling member installed on the driving plate and in rolling cooperation with the first wedge block. When the first wedge block moves along the length direction of the first clamping seat, the rolling member will approach or move away from the first clamping seat.

[0016] Further: A first movable rod is installed between the driving plate and the second clamping seat. A first movable hole for the first movable rod to move through is formed in the first clamping seat along its width direction. A first compression spring nested on the first movable rod is provided in the first movable hole. The first compression spring elastically drives the driving plate to approach the first clamping seat.

[0017] Further: The movable member includes a second movable hole opened along the length direction of the first clamping seat. A second movable rod is installed in the movable hole. The first wedge block is installed on the second movable rod. A second compression spring nested on the second movable rod is further provided in the second movable hole. The second compression spring can drive one end of the second movable rod to elastically move outward; The first clamping seat is movably provided with a first clamping block, and the second clamping seat is movably provided with a second clamping block. Guide rail structures are respectively arranged on the first clamping seat and the second clamping seat longitudinally. The first clamping block and the second clamping block can move longitudinally along the guide rail structure, and the first clamping block and the second clamping block can be elastically jacked up along the guide rail structure respectively.

[0018] Advantages of the present utility model: When clamping the battery, under the action of an external force, the movable member can be made to move along the length direction of the first clamping seat, so that the second clamping seat can approach or move away from the first clamping seat, thereby changing the distance between the first clamping seat and the second clamping seat, facilitating adaptive clamping of batteries with different thicknesses, preventing the battery from falling off the fixture, and the clamped battery has better stability during liquid injection. Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of a parallel - type battery liquid injection device.

[0020] Figure 2 It is a structural schematic diagram of a battery conveying mechanism.

[0021] Figure 3 It is a structural schematic diagram of an intermediate conversion pitch mechanism, that is, the state diagram when multiple intermediate fixtures are spaced apart.

[0022] Figure 4 It is a state diagram when multiple transfer jigs approach each other.

[0023] Figure 5 It is a state diagram when multiple transfer jigs approach each other.

[0024] Figure 6 It is a schematic structural diagram of a guiding and supporting member.

[0025] Figure 7 It is a schematic structural diagram of a jig mechanism.

[0026] Figure 8 It is a schematic structural diagram of the clamping state of a battery jig.

[0027] Figure 9 It is a schematic structural diagram of the open state of a battery jig.

[0028] Figure 10 It is a schematic explosion structure diagram of a battery jig.

[0029] Figure 11 It is an explosion schematic diagram of a first clamp seat and an elastic connecting member.

[0030] Figure 12 It is a schematic diagram of multiple liquid injection modules installed in parallel.

[0031] Reference numerals include:

[0032] 10 - Battery conveying mechanism,

[0033] 101 - Forward conveyor belt, 102 - Preliminary jig, 103 - Weighing platform, 104 - Loading manipulator,

[0034] 1 - Intermediate pitch-changing mechanism,

[0035] 10 - Pitch-changing drive mechanism, 11 - Linear module, 12 - Moving seat, 13 - Guiding and supporting member,

[0036] 14 - Pitch-changing support plate, 15 - Pitch-changing guide rail, 16 - Pitch-changing sliding seat,

[0037] 2 - Connecting member,

[0038] 21 - First connecting bar, 22 - Intermediate connecting bar, 23 - Second connecting bar, 24 - Sliding member,

[0039] 25 - First sliding block, 26 - Intermediate sliding block, 27 - Second sliding block,

[0040] 3 - Limiting structure,

[0041] 31 - First sliding groove, 32 - Intermediate sliding groove, 33 - Second sliding groove, 34 - First transfer fixture, 35 - Second transfer fixture, 36 - Third transfer fixture, 37 - Fourth transfer fixture,

[0042] 38 - Fifth transfer fixture, 39 - Sixth transfer fixture,

[0043] 399 - Clamping station,

[0044] 4 - Fixture mechanism,

[0045] 40 - Battery fixture, 41 - First clamping seat, 42 - Second clamping seat, 43 - First clamping block,

[0046] 44 - Second clamping block, 45 - Guide rail structure, 46 - Activity slot, 47 - Longitudinal guide rail,

[0047] 48 - Jacking compression spring,

[0048] 5 - Elastic connecting piece,

[0049] 51 - First movable rod, 52 - Driving plate, 53 - First movable hole, 54 - First compression spring,

[0050] 55 - Rolling groove, 56 - Rolling element, 57 - Poking seat, 58 - Second wedge block, 59 - Limiting groove,

[0051] 6 - Movable part,

[0052] 61 - Second movable rod, 62 - Second movable hole, 63 - Second compression spring, 64 - First wedge block,

[0053] 65 - Support tray,

[0054] 7 - Fixture handling mechanism

[0055] 71 - Linear crossbeam, 72 - Liquid injection module, 73 - Liquid injection cavity mechanism, 74 - First handling robot,

[0056] 75 - Second handling robot, 76 - Unloading position. Detailed implementation mode

[0057] The present utility model will be described in detail below with reference to the accompanying drawings.

[0058] As Figures 1-12 shown, a parallel - type battery liquid injection device includes a battery conveying mechanism 100, an intermediate variable - pitch mechanism 1, a fixture mechanism 4, a fixture handling mechanism 7, and a liquid injection cavity mechanism.

[0059] The battery conveying mechanism 100 includes a forward conveyor belt 101 arranged horizontally. A plurality of preliminary jigs 102 for installing batteries are arranged along the length direction of the forward conveyor belt 101. The batteries to be loaded are placed into the preliminary jigs 102. After the preliminary jigs 102 move forward to the end, a loading manipulator 104 is arranged at the end. The loading manipulator 104 puts the batteries in the preliminary jigs 102 onto the weighing platform 103 for weighing. Some defective products beyond the range can be excluded through the weighing platform 103.

[0060] The qualified products after weighing are put into the intermediate pitch-changing mechanism 1 by the transfer manipulator.

[0061] The intermediate pitch-changing mechanism 1 includes a plurality of transfer jigs arranged at intervals, and also includes a pitch-changing drive mechanism 10 for driving two adjacent transfer jigs to move away from or close to each other; the pitch-changing drive mechanism 10 includes a moving seat 12 connected to the outermost transfer jig. The moving seat 12 can move along the moving direction of the transfer jig. A connecting member 2 is arranged between two adjacent transfer jigs. One or more of the transfer jigs are installed with sliding members 24 that can move along the length direction of the connecting member 2.

[0062] When the moving seat 12 moves towards the innermost transfer jig, it will drive two adjacent transfer jigs to move closer to each other, so that the distance between two adjacent transfer jigs is shortened. When the battery enters the transfer position, the movement of the manipulator needs to be reduced, and the transfer efficiency of the intermediate transfer is increased; when the moving seat 12 moves away from the innermost transfer jig, two adjacent transfer jigs move away from each other, and some sliding members 24 installed on the transfer jigs will move along the length direction of the connecting member 2. The limit structure 3 can prevent the sliding member 24 from moving beyond the stroke; the subsequent manipulator can synchronously clamp and transfer multiple batteries to the liquid injection station at the same time; further improving the transfer efficiency of the intermediate transfer.

[0063] Specifically, the intermediate pitch-changing mechanism 1 further includes a guiding support member 13 for guiding the movement of a plurality of transfer jigs. The guiding support member 13 includes a pitch-changing support plate 14. The pitch-changing support plate 14 is provided with pitch-changing guide rails 15 along the length direction. The transfer jig is installed with a pitch-changing sliding seat 16 that is slidably matched with the pitch-changing guide rails 15. When two adjacent transfer jigs move, the movement stability can be improved.

[0064] Preferably, the number of the pitch-changing guide rails 15 is two, and they are respectively located on both sides of the pitch-changing support plate 14. One transfer jig is supported by two pitch-changing sliding seats 16, which can further improve the movement stability.

[0065] Furthermore, the pitch-changing drive mechanism 10 further includes a linear module 11. The driving end of the linear module 11 is connected to the moving seat 12. When the linear module 11 works, it can drive the driving seat to move along the length direction of the linear module 11, driving the distance between two adjacent transfer jigs to shorten or increase.

[0066] Preferably, the linear module 11 can also be replaced by a telescopic cylinder. The moving stroke of the telescopic end of the telescopic cylinder is the same as the length of the variable pitch guide rail 15, so that two adjacent transfer jigs can be arranged at equal intervals.

[0067] Preferably, the connecting member 2 includes a first connecting strip 21, an intermediate connecting strip 22 and a second connecting strip 23; the intermediate connecting strip 22 is located between the first connecting strip 21 and the second connecting strip 23, and the length of the intermediate connecting strip 22 is greater than that of the first connecting strip 21 and the second connecting strip 23. The two adjacent transfer jigs are movably connected through the connecting strips; when two adjacent transfer jigs approach each other, the first connecting strip 21 and the second connecting strip 23 approach each other, and the intermediate connecting strip 22 can be inserted into the first connecting strip 21 and the second connecting strip 23 respectively; when two adjacent transfer jigs approach each other, the first connecting strip 21, the intermediate connecting strip 22 and the second connecting strip 23 will not collide with each other.

[0068] In one embodiment, the transfer jigs are divided into a first transfer jig 34, a second transfer jig 35, a third transfer jig 36, a fourth transfer jig 37, a fifth transfer jig 38 and a sixth transfer jig 39 arranged in sequence. The first connecting strip 21 is installed between the first transfer jig 34 and the second transfer jig 35; the second connecting strip 23 is installed between the fifth transfer jig 38 and the sixth transfer jig 39, and the intermediate connecting strip 22 is installed on the fourth transfer jig 37. One end of the intermediate connecting strip 22 is connected to the third transfer jig 36, and the other end is connected to the fifth transfer jig 38. The six transfer jigs are movably connected through three connecting strips and the sliding member 24. Driven by the variable pitch driving mechanism 10, two adjacent transfer jigs move away from or close to each other.

[0069] Further, the limiting structure 3 includes a first sliding groove 31 formed along the length direction of the first connecting strip 21. The sliding member 24 includes a first sliding block 25 installed on the second transfer jig 35 and a second sliding block 27 installed on the sixth transfer jig 39. The second connecting strip 23 is formed with a second sliding groove 33 along the length direction. When the pitch is changed, the first sliding block 25 is slidably matched with the first sliding groove 31, and the second sliding block 27 is slidably matched with the second sliding groove 33, which can prevent the first sliding block 25 and the second sliding block 27 from exceeding the stroke when sliding.

[0070] Further, intermediate sliding grooves 32 are respectively formed along the length direction on both sides in the middle of the intermediate connecting strip 22; the sliding member 24 further includes intermediate sliding blocks 26 respectively installed on the third transfer jig 36 and the fifth transfer jig 38, and the intermediate sliding blocks 26 are slidably matched with the intermediate sliding grooves 32.

[0071] In this embodiment, when the moving seat 12 moves towards the first transfer fixture 34 at the innermost end, the sixth transfer fixture 39 moves close to the fifth transfer fixture 38 along the second sliding groove 33 of the second connecting bar 23 through the second sliding block 27; when the sixth transfer fixture 39 abuts against the fifth transfer fixture 38, the fifth transfer fixture 38 moves close to the fourth transfer fixture 37 along the intermediate sliding groove 32 through the intermediate sliding block 26; when the fifth transfer fixture 38 abuts against the fourth transfer fixture 37, the fourth transfer fixture 37 moves close to the third transfer fixture 36, and at the same time, the intermediate sliding block 26 of the third transfer fixture 36 slides in cooperation with the intermediate sliding groove 32 on the other side of the intermediate connecting bar 22; when the fourth transfer fixture 37 abuts against the third transfer fixture 36, the third transfer fixture 36 moves close to the second transfer fixture 35, and when the third transfer fixture 36 abuts against the second transfer fixture 35, the second transfer fixture 35 moves close to the first transfer fixture 34 along the first sliding groove 31 through the first sliding block 25 until the second transfer fixture 35 abuts against the first transfer fixture 34, realizing the fitting of the six transfer fixtures.

[0072] At this time, the first sliding block 25 installed on the second transfer fixture 35 abuts against the inner end of the first sliding groove 31, the intermediate sliding block 26 installed on the third transfer fixture 36 abuts against the outer end of the inner intermediate sliding groove 32, the intermediate sliding block 26 installed on the fifth transfer fixture 38 abuts against the inner end of the outer intermediate sliding groove 32, and the second sliding groove 33 installed on the sixth transfer fixture 39 abuts against the inner end of the second sliding groove 33. Thus, the six transfer fixtures are fitted to each other.

[0073] Conversely, when the moving seat 12 moves towards the sixth transfer fixture 39, the adjacent two transfer fixtures will move in the opposite direction to that described above, causing the adjacent two transfer fixtures to separate from each other, realizing the effect of variable distance.

[0074] Furthermore, the lengths of the first sliding groove 31, the second sliding groove 33, and the intermediate sliding groove 32 are the same; the lengths of the first connecting bar 21 and the second connecting bar 23 are the same; when the moving seat 12 moves towards the sixth transfer fixture 39 to the maximum stroke, the distance between the fifth transfer fixture 38 and the sixth transfer fixture 39 is equal to the distance between the first transfer fixture 34 and the second transfer fixture 35; the distance between the third transfer fixture 36 and the fourth transfer fixture 37 is equal to the distance between the fourth transfer fixture 37 and the fifth transfer fixture 38.

[0075] Furthermore, the first connecting strip 21, the middle connecting strip 22, and the second connecting strip 23 are arranged offset in the moving direction of the transfer jig; the number of both the first connecting strip 21 and the second connecting strip 23 is two. A first guiding channel for inserting a part of the middle connecting strip 22 is formed between the two first connecting strips 21, and a second guiding channel for inserting the other part of the middle connecting strip 22 is formed between the two second connecting strips 23; when six transfer jigs are fitted together, a part of the middle connecting strip 22 is inserted into the first guiding channel, the other part of the middle connecting strip 22 is inserted into the second guiding channel, and at the same time, the first connecting strip 21 and the second connecting strip 23 are fitted together.

[0076] The distance between the second transfer jig 35 and the third transfer jig 36 is equal to the distance between the third transfer jig 36 and the fourth transfer jig 37, so that the distances between adjacent two transfer jigs are kept consistent; subsequent manipulators can synchronously clamp and transfer multiple batteries to the liquid injection station at the same time; further improving the transfer efficiency during transfer.

[0077] When the moving seat 12 moves to the maximum stroke towards the sixth transfer jig 39, the first sliding block 25 installed on the second transfer jig 35 abuts against the outer end of the first sliding groove 31, the middle sliding block 26 installed on the third transfer jig 36 abuts against the inner end of the middle sliding groove 32 on the inner side, the middle sliding block 26 installed on the fifth transfer jig 38 abuts against the outer end of the middle sliding groove 32 on the outer side, and the second sliding block 33 installed on the sixth transfer jig 39 abuts against the inner end of the second sliding groove 33. Thus, the six transfer jigs are arranged at equal intervals.

[0078] Furthermore, each transfer jig is provided with two clamping stations 399 for positioning the battery. The six transfer jigs can transfer and position 12 batteries.

[0079] It should be noted that different numbers of transfer jigs can be set according to the cooperation between the connecting member 2 and the sliding member 24, so that different numbers of batteries can be transferred during transfer, further improving the practicability; the variable-distance structure enables the loading manipulator to complete the handling of the battery cells with a smaller stroke, reducing the handling time sequence of the battery cells.

[0080] The six transfer jigs are provided with twelve clamping stations 399. After the transfer jigs are evenly unfolded through the cooperation between the connecting member 2 and the sliding member 24, they are used for feeding into the jig mechanism 4.

[0081] The fixture mechanism 4 is arranged beside the intermediate turning and spacing mechanism 1. A first handling manipulator 74 is arranged between the intermediate turning and spacing mechanism 1 and the fixture mechanism 4. A handling plate is installed at the driving end of the first handling manipulator 74, and a plurality of handling clamps capable of opening and closing are installed on the handling plate. The fixture mechanism 4 includes a support tray 65 and a plurality of battery fixtures 40 installed on the support tray. When the handling clamps are vertically coaxially aligned with the support tray 65, the handling clamps are coaxially aligned with the battery fixtures 40, and six batteries of the intermediate turning and spacing mechanism 1 can be transferred to the fixture mechanism 4 at one time.

[0082] Specifically, the weighed batteries are sequentially placed into twelve clamping stations 399 by the intermediate transfer manipulator. After the stacking is completed, the intermediate transfer clamps are evenly expanded to the maximum stroke through the cooperation of the connecting member 2 and the sliding member 24. At this time, the six handling clamps of the intermediate transfer manipulator are exactly coaxially aligned with six of the clamping stations 399, and six batteries of the intermediate turning and spacing mechanism 1 can be clamped at the same time and then transferred to the six battery fixtures 40 of the fixture mechanism 4. After two consecutive transfers, the twelve battery fixtures 40 of the fixture mechanism 4 are full; the two adjacent intermediate transfer clamps are retracted to the minimum stroke through the cooperation of the connecting member 2 and the sliding member 24, and the feeding continues.

[0083] The battery fixture 40 includes a first clamping seat 41 and a second clamping seat 42. The second clamping seat 42 can elastically approach the first clamping seat 41. The first clamping seat 41 is provided with a movable member 6. When the movable member 6 moves toward one side of the first clamping seat 41, the second clamping seat 42 can move away from the first clamping seat 41. When the movable member 6 moves toward the other side of the first clamping seat 41, the second clamping seat 42 can elastically approach the first clamping seat 41.

[0084] Under the action of an external force, the movable member 6 can be made to move along the length direction of the first clamping seat 41, so that the second clamping seat 42 can approach or move away from the first clamping seat 41, thereby changing the distance between the first clamping seat 41 and the second clamping seat 42, facilitating the adaptive clamping of batteries with different thicknesses, preventing the batteries from falling out of the fixture, and the stability of the clamped batteries is better during liquid injection.

[0085] Specifically, the first clamping seat 41 is movably provided with a first clamping block 43, and the second clamping seat 42 is movably provided with a second clamping block 44. The first clamping seat 41 and the second clamping seat 42 are respectively provided with a guide rail structure 45 in the longitudinal direction. The first clamping block 43 and the second clamping block 44 can move longitudinally along the guide rail structure 45, and the first clamping block 43 and the second clamping block 44 can be elastically jacked up along the guide rail structure 45 respectively. The first clamping block 43 is movably installed on the first clamping seat 41, and the second clamping block 44 is movably installed on the second clamping seat 42. After the second clamping seat 42 approaches the first clamping seat 41, the battery is clamped and contacted by the first clamping block 43 and the second clamping block 44. After clamping, during liquid injection, in order to maintain the sealing effect between the liquid injection needle and the battery liquid injection port, the first clamping block 43 and the second clamping block 44 are initially elastically jacked up. Under the pressing of the liquid injection needle, the first clamping block 43 and the second clamping block 44 will adaptively descend to maintain the sealing effect between the liquid injection needle and the battery liquid injection port, and the quality during liquid injection is better.

[0086] Preferably, the guide rail structure 45 includes movable grooves 46 respectively formed on the first clamping seat 41 and the second clamping seat 42. The movable grooves 46 are provided with longitudinal guide rails 46, and the movable grooves 46 are provided with jacking compression springs 48 for elastically jacking up the first clamping block 43 and the second clamping block 44, so that the first clamping block 43 and the second clamping block 44 can elastically contact the liquid injection needle.

[0087] Specifically, an elastic connecting piece 5 in contact with the movable piece 6 is arranged between the first clamping seat 41 and the second clamping seat 42. The elastic connecting piece 5 is elastically connected to the second clamping seat 42 and always keeps in contact with the movable piece 6. When the movable piece 6 moves along the length direction of the first clamping seat 41, the elastic connecting piece 5 will approach or move away from the first clamping seat 41 to drive the second clamping seat 42 to move synchronously. Since the elastic connecting piece 5 is elastically connected to the second clamping seat 42, initially, the second clamping seat 42 is always elastically close to the first clamping seat 41 and is in a closed state. When the movable piece 6 moves along the length direction of the first clamping seat 41, the movable piece 6 will cooperate with the elastic connecting piece 5. The movable piece 6 gives way to a space for a part of the elastic connecting piece 5 to approach the first clamping seat 41. Under the elastic action, the elastic connecting piece 5 moves towards the first clamping seat 41, so that the second clamping seat 42 moves away from the first clamping seat 41, forming an open fixture posture.

[0088] Specifically, the movable member 6 includes a first wedge block 64 that moves along the length direction of the first clamping seat 41. The elastic connecting member 5 includes a driving plate 52 disposed outside the first clamping seat 41. The driving plate 52 will approach the first clamping seat 41 under the elastic action. The elastic connecting member 5 further includes a rolling member 56 mounted on the driving plate 52 and in rolling cooperation with the first wedge block 64. When the first wedge block 64 moves along the length direction of the first clamping seat 41, the rolling member 56 will approach or move away from the first clamping seat 41. When an external force acts on the first movable member 6 and the first wedge block 64 moves forward, the inclined surface of the first wedge block 64 is in rolling cooperation with the rolling member 56. The rolling member 56 will approach the first clamping seat 41 under the action of the inclined surface of the first wedge block 64. At the same time, the driving plate 52 for mounting the rolling member 56 will approach the first clamping seat 41. Under the elastic action, the elastic connecting member 5 moves in the direction of the first clamping seat 41, causing the second clamping seat 42 to move away from the first clamping seat 41, forming an open posture of the jig.

[0089] In one embodiment, a first movable rod 51 is installed between the driving plate 52 and the second clamping seat 42. The first clamping seat 41 is formed with a first movable hole 53 for the first movable rod 51 to pass through along its width direction. The first movable hole 53 is provided with a first compression spring 54 nested on the first movable rod 51. The first compression spring 54 elastically drives the driving plate 52 to approach the first clamping seat 41. When the first wedge block 64 moves forward under the action of an external force, the inclined surface of the first wedge block 64 is in rolling cooperation with the rolling member 56. The driving plate 52 connected to the first movable rod 51 moves along the first movable hole 53 of the first clamping seat 41 in the direction of the second clamping seat 42 under the elastic action of the first compression spring 54, causing the second clamping seat 42 connected to one end of the first movable rod 51 to move away from the first clamping seat 41, realizing the opening.

[0090] In one embodiment, the movable member 6 includes a second movable hole 62 formed along the length direction of the first clamping seat 41. A second movable rod 61 is installed in the movable hole. A first wedge block 64 is installed on the second movable rod 61. A second compression spring 63 nested on the second movable rod 61 is further provided in the second movable hole 62. The second compression spring 63 can drive one end of the movable rod to elastically move outward. When an external force acts on the second movable rod 61, the second movable rod 61 moves along the second movable hole 62 of the first clamping seat 41, and the first wedge block 64 installed on the second movable rod 61 moves synchronously. At this time, it will rollingly cooperate with the rolling member 56. The inclined surface formed by the first wedge block 64 allows the rolling member 56 to continuously approach the first clamping seat 41, realizing the open posture of the jig. When the external force is cancelled and does not act on the second movable rod 61, the second movable rod 61 will move backward along the second movable hole 62 under the elastic action of the second compression spring 63. At this time, the inclined surface formed by the first wedge block 64 rollingly cooperates with the rolling member 56, and the rolling member 56 moves away from the first clamping seat 41 conversely. At the same time, the first movable rod 51 moves along the first movable hole 53 of the first clamping seat 41 in a direction away from the second clamping seat 42, so that the second clamping seat 42 connected to one end of the first movable rod 51 approaches the first clamping seat 41, realizing the closing and clamping of the jig.

[0091] Preferably, the elastic force of the second compression spring 63 is greater than that of the first compression spring 54, so as to ensure that when the second movable rod 61 moves backward, the driving plate 52 equipped with the rolling member 56 can be driven away from the first clamping seat 41 through the first wedge block 64.

[0092] Preferably, the first clamping seat 41 is formed with a limiting groove 59 for guiding and limiting the movement of the first wedge block 64. The limiting groove 59 can prevent the first wedge block 64 from moving beyond the stroke, so that the first wedge block 64 remains in contact with the rolling member 56, preventing the first wedge block 64 from being unable to rebound.

[0093] Preferably, the rolling member 56 is a rolling bearing movably installed on the driving plate 52.

[0094] In one embodiment, the driving plate 52 is formed with a rolling groove 55 for installing a rolling member 56, and the rolling groove 55 is installed with a fixed shaft. The rolling member 56 can be rotatably installed in the rolling groove 55 through the fixed shaft. When the first wedge block 64 moves, the fixed member can roll around the rolling groove 55 and cooperate with the inclined surface of the first wedge block 64; the driving plate 52 is also provided with an anti-stuck device, which includes a toggle seat 57 that can move along the length direction of the driving plate 52, the toggle seat 57 is formed with an active cavity for the limited movement of the rolling member 56, and the toggle seat 57 is formed with a second wedge block 58 that rolls with the rolling member 56. When the clamp is opened, the rolling member 56 is at the bottom of the inclined surface of the first wedge block 64. When the first wedge block 64 retreats and needs to close the fixture, there is a chance that it will get stuck, causing the fixture to be stuck in the open state and cannot be restored; at this time, the movable toggle seat 57 changes its position, driving the rolling member 56 to contact the inclined surface of the first wedge block 64, and at this time, the rolling member 56 can be prevented from getting stuck.

[0095] The fixture transport mechanism 7 includes a linear beam 71 arranged along the length direction, and a plurality of liquid injection modules 72 are arranged on the linear beam 71 along the length direction.

[0096] Preferably, the number of the injection modules 72 is three.

[0097] The injection module 72 includes the injection chamber mechanisms 73 respectively installed on the left and right sides of the linear beam 71 along the length direction. The injection chamber mechanisms 73 can move in the vertical direction under the drive of the lifting mechanism. A jig transport mechanism 7 is arranged between the left and right injection chamber mechanisms 73. The jig transport mechanism 7 includes the support tray 65 for installing the battery jig 40. The first transport robot 74 can move along the length direction of the linear beam 71 to transfer the battery of the intermediate shift mechanism 1 to the support tray 65. When the injection chamber mechanism 73 on the left is working, the support tray 65 moves to the bottom of the injection chamber mechanism 73 on the right. The injection chamber mechanism 73 descends and is sealed and connected with the support tray 65 to cooperate with the battery jig 40 on the support tray 65 to perform the injection operation.

[0098] The straight beam 71 is also slidably mounted with a second handling robot 75. When the battery filling of the battery fixture 40 supporting the tray 65 is completed, it is moved horizontally to be aligned with the straight beam 71, and the second handling robot 75 approaches the supporting tray 65. The structure of the second handling robot 75 is similar to that of the first handling robot 74, and both can clamp multiple batteries at the same time. The batteries that have completed filling are clamped and transferred to the unloading position 76 by the second handling robot 75.

[0099] Compared with existing equipment, this equipment can perform liquid injection production on batteries with different specifications, and has strong versatility, strong integration, simple model change, and low cost. Due to layout and mechanism limitations, other traditional liquid injection equipment can only produce one or two similar batteries, with complex model change, high cost, and low production efficiency. By integrating various process flows and adjusting processes, this equipment has a compact machine structure, effectively saving production time and greatly improving production capacity.

[0100] In summary, it can be seen that the present utility model has the above-mentioned excellent characteristics, enabling it to enhance the efficiency never achieved in the prior art during use, and thus having practicality, becoming a product with extremely high practical value.

[0101] The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A parallel battery liquid injection device, including a battery conveying mechanism for advancing the conveyance of batteries, characterized in that: It further includes a liquid injection fixture and a transfer pitch-changing mechanism for transferring the battery from the conveying mechanism to the liquid injection fixture; The transfer pitch-changing mechanism includes a plurality of transfer fixtures arranged at intervals, and also includes a pitch-changing driving mechanism for driving two adjacent transfer fixtures to move away from or close to each other; The liquid injection fixture includes a first clamping seat and a second clamping seat. The second clamping seat can elastically approach the first clamping seat. The first clamping seat is provided with a movable member. When the movable member moves towards one side of the first clamping seat, the second clamping seat can move away from the first clamping seat. When the movable member moves towards the other side of the first clamping seat, the second clamping seat can elastically approach the first clamping seat.

2. The parallel battery liquid injection device according to claim 1, characterized in that: The pitch-changing driving mechanism includes a moving seat connected to the outermost transfer fixture. The moving seat can move along the moving direction of the transfer fixture. A connecting member is arranged between two adjacent transfer fixtures. One or more of the transfer fixtures are installed with sliding members that can move along the length direction of the connecting member. The connecting member is provided with a limiting structure for limiting the movement of the sliding member.

3. The parallel battery liquid injection device according to claim 2, characterized in that: The transfer pitch-changing mechanism further includes a guiding support member for guiding the movement of a plurality of transfer fixtures. The guiding support member includes a pitch-changing support plate. The pitch-changing support plate is provided with pitch-changing guide rails arranged along the length direction. The transfer fixture is installed with a pitch-changing sliding seat that is slidably matched with the pitch-changing guide rail.

4. The parallel battery liquid injection device according to claim 3, characterized in that: The connecting member includes a first connecting strip, an intermediate connecting strip and a second connecting strip; the intermediate connecting strip is located between the first connecting strip and the second connecting strip, and the length of the intermediate connecting strip is greater than the lengths of the first connecting strip and the second connecting strip; when two adjacent transfer fixtures approach each other, the first connecting strip and the second connecting strip approach each other, and the intermediate connecting strip can be inserted into the first connecting strip and the second connecting strip respectively.

5. The parallel battery liquid injection device according to claim 4, characterized in that: The transfer fixtures are divided into a first transfer fixture, a second transfer fixture, a third transfer fixture, a fourth transfer fixture, a fifth transfer fixture and a sixth transfer fixture arranged in sequence; the first connecting strip is installed between the first transfer fixture and the second transfer fixture; the second connecting strip is installed between the fifth transfer fixture and the sixth transfer fixture, and the intermediate connecting strip is installed on the fourth transfer fixture. One end of the intermediate connecting strip is connected to the third transfer fixture, and the other end is connected to the fifth transfer fixture.

6. The parallel battery liquid injection device according to claim 5, characterized in that: The first connecting strip is formed with a first sliding groove along the length direction. The sliding member includes a first sliding block installed on the second transfer fixture and a second sliding block installed on the sixth transfer fixture. The first sliding block is slidably matched with the first sliding groove; the second connecting strip is formed with a second sliding groove along the length direction. The second sliding block is slidably matched with the second sliding groove.

7. The parallel battery liquid injection device according to claim 1, characterized in that: An elastic connecting member in contact with the movable member is arranged between the first clamping seat and the second clamping seat. The elastic connecting member is elastically connected to the second clamping seat and is always in contact with the movable member. When the movable member moves along the length direction of the first clamping seat, the elastic connecting member will approach or move away from the first clamping seat to drive the second clamping seat to move synchronously.

8. The parallel battery liquid injection device according to claim 7, characterized in that: The movable member includes a first wedge block that moves along the length direction of the first clamping seat. The elastic connecting member includes a driving plate disposed outside the first clamping seat. The driving plate will approach the first clamping seat under elastic action. The elastic connecting member further includes a rolling member mounted on the driving plate and in rolling cooperation with the first wedge block. When the first wedge block moves along the length direction of the first clamping seat, the rolling member will approach or move away from the first clamping seat.

9. The parallel battery liquid injection device according to claim 8, characterized in that: A first movable rod is installed between the driving plate and the second clamping seat. The first clamping seat is formed with a first movable hole for the first movable rod to pass through along its width direction. The first movable hole is provided with a first compression spring nested on the first movable rod, and the first compression spring elastically drives the driving plate to approach the first clamping seat.

10. A parallel battery liquid injection device according to claim 9, characterized in that: The movable member includes a second movable hole opened along the length direction of the first clamping seat. A second movable rod is installed in the movable hole, and the first wedge block is mounted on the second movable rod. The second movable hole is further provided with a second compression spring nested on the second movable rod, and the second compression spring can drive one end of the second movable rod to elastically move outward; the first clamping seat is movably provided with a first clamping block, and the second clamping seat is movably provided with a second clamping block. The first clamping seat and the second clamping seat are respectively provided with guide rail structures along the longitudinal direction. The first clamping block and the second clamping block can move longitudinally along the guide rail structures, and the first clamping block and the second clamping block can respectively be elastically lifted along the guide rail structures.

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