Battery wire binding device and method

Abstract

The present invention discloses a battery wire binding device, wherein a horizontal rotating device drives a battery pack to rotate horizontally; a lifting assembly of a lifting device drives a positioning block with a hole to rise or fall; an installation mechanism of a constant force wire-paying device is used to install the wire drum wheels A, B, and C, and the wire binding is connected to the battery pack through wheels A, B, C, D, and the positioning block with a hole; wheel C rotates around a certain point on the constant force wire-paying device under tension, and wheel D is fixed to a conveyor frame, with an angle ∠BCD being a constant value; a brake assembly is used to release the brake on the wire drum when the tension generated by the horizontal rotation of the battery pack is greater than or equal to a predetermined value. The present invention also discloses a battery wire binding method, wherein the horizontal rotating device rotates horizontally while the positioning block with a hole in the lifting device rises or falls at a constant rate, thereby achieving winding of the wire binding on the battery pack. The present invention is conducive to improving wire binding efficiency and wire binding quality, and is particularly suitable for wire binding of high-expansion battery packs.

Description

Technical Field

[0001] The present invention relates to a battery module wire binding device and method, in particular to a high-expansion lithium battery module wire binding device and method, belonging to the technical field of wire binding equipment. Background Art

[0002] With the gradual maturity of metal lithium secondary battery technology and silicon-carbon lithium-ion batteries, especially metal lithium secondary batteries, which can also achieve charge and discharge within a certain period, and the specific energy can be as high as 530Wh / kg or higher, it has great application value in the field of high specific energy. However, the thickness of metal lithium secondary batteries needs to be squeezed and constrained, otherwise the negative electrode active material will lose its activity in large quantities and become dead lithium, which will not be able to participate in charge and discharge, and thus cause rapid capacity decay. In order to improve the specific energy of the battery module, it is necessary to adopt a wire binding structure to reduce the weight of the battery module and provide a high-strength clamping force. However, the quality of the wire binding directly affects the quality of the battery module binding. If the wire binding force is not set uniformly, it is easy to produce an avalanche effect where one wire breaks and all others break. At the same time, manual wire binding is extremely inefficient, so there is an urgent need for a battery pack wire binding device to achieve wire binding of high-expansion battery packs and ensure that the wire binding efficiency and wire binding quality meet the requirements.

[0003] Existing wire-binding devices typically use a hooking method to bind cylindrical objects. However, the present invention binds long, rectangular objects, requiring greater tension for both binding and untying. During the binding process, existing wire-binding devices can easily cause the wire to become untied due to friction, or the hook and the wire-passing area to be cut by the wire for extended periods, causing accelerated wear. This results in a high failure rate and makes the device unsuitable for binding long battery packs, failing to meet the requirements for high binding efficiency and quality. Summary of the Invention

[0004] The present invention aims to overcome the aforementioned drawbacks by providing a battery wire-binding device and method. This device addresses the technical problem of uneven binding force in existing wire-binding devices, which can easily cause wire breakage, and further addresses the problem of accelerated wear in existing wire-binding devices. This invention improves wire-binding efficiency and quality, and is particularly suitable for wire-binding high-expansion battery packs.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A battery pack wire binding device, comprising a horizontal rotating device, a lifting device, a constant force wire-paying device, a conveying frame, a wire drum and a wheel set;

[0007] The horizontal rotation device drives the battery pack to be tied to rotate horizontally;

[0008] The lifting device includes a lifting assembly and a positioning block with a hole. The lifting assembly is used to drive the positioning block with a hole to rise or fall;

[0009] The wheel set includes wheel A, wheel B, wheel C and wheel D;

[0010] The constant force pay-off device includes a mounting mechanism and a brake assembly; the mounting mechanism is used to mount the bobbin A, B, and C wheels. One end of the binding wire is wound around the bobbin, and the other end passes through the A, B, C, and D wheels and the positioning block with holes in sequence to connect to the battery pack.

[0011] The C wheel rotates around a certain point on the constant-force pay-off device under the tension generated by the horizontal rotation of the battery pack. The D wheel is fixed on the conveyor frame, which is located between the constant-force pay-off device and the lifting device. The angle ∠BCD formed by the binding wire passing through the B, C and D wheels is a constant value.

[0012] The brake assembly is used to brake the wire drum when the pulling force generated by the horizontal rotation of the battery pack is less than a predetermined value, and to release the brake on the wire drum when the pulling force generated by the horizontal rotation of the battery pack is greater than or equal to the predetermined value.

[0013] Furthermore, the mounting mechanism of the constant force pay-off device includes a second mounting frame, a bobbin mounting shaft, a first balance bar, and a second balance bar;

[0014] The second mounting bracket is used for mounting the bobbin mounting shaft, the first balance pole and the second balance pole from bottom to top;

[0015] The spool mounting shaft is connected to the second mounting frame and can rotate relative to it. The spool mounting shaft is used to support the spool, and there is no relative rotation between the spool mounting shaft and the supported spool; the first balance bar is installed on the second mounting frame, the A wheel and the B wheel are fixedly installed on the first balance bar, and the C wheel is fixedly installed on the second balance bar. Under the tension generated by the horizontal rotation of the battery pack, the second balance bar drives the C wheel to rotate around a certain point on the second mounting frame.

[0016] Furthermore, the brake assembly of the constant force pay-off device includes a brake shaft, a brake band, a brake transmission rod, an eccentric wheel and a tension regulator;

[0017] The eccentric wheel is mounted on the second mounting frame via a rotating shaft. One end of the second balancing pole is fixedly connected to the eccentric wheel, and the other end is mounted with a C wheel. The tension generated by the horizontal rotation of the battery pack drives the C wheel and the eccentric wheel to rotate around the rotating shaft. The rotation of the eccentric wheel presses down or releases the first end of the first balancing pole.

[0018] The first balancing arm is connected to the upper end of the transmission rod, the tension adjuster, the A wheel and the B wheel in sequence from the first end to the second end; the first balancing arm is rotatably connected to the second mounting frame through a balancing shaft at a position between the upper end of the transmission rod and the tension adjuster, and the tension adjuster applies a downward tension to the first balancing arm; the lower end of the transmission rod is connected to one end of the brake belt, and the other end of the brake belt is fixed; the brake shaft is coaxial with the spool and rotates synchronously with the spool, the brake belt is U-shaped, and the brake shaft is located between the two ends of the brake belt; when the downward pressure of the eccentric wheel on the first end of the first balancing arm overcomes the tension of the tension adjuster, the first end of the first balancing arm drives one end of the brake belt to move downward through the transmission rod, and the brake belt is separated from the brake shaft to release the brake. When the downward pressure of the eccentric wheel on the first end of the first balancing arm cannot overcome the tension of the tension adjuster, the tension of the tension adjuster causes the first end of the first balancing arm to lift up, and the transmission rod drives one end of the brake belt to lift up, and the brake belt is pressed against the brake shaft to achieve braking.

[0019] Furthermore, the lifting device also includes a horizontal rotating platform, a wire feeding cantilever and a horizontal rotating bearing;

[0020] The positioning block with holes is installed above the horizontal rotating table through the wire feeding cantilever, and is installed on the lifting assembly below the horizontal rotating table through the horizontal rotating bearing. The lifting assembly is used to drive the horizontal rotating table and the positioning block with holes to rise or fall. The positioning block with holes is passively rotated under the tension generated by the horizontal rotation of the battery pack through the horizontal rotating table, so that the axial direction of the wire hole of the positioning block with holes changes in real time with the binding wire position.

[0021] Furthermore, the wheel set further includes an E wheel, which is fixedly mounted on the rotation center of the horizontal rotating platform;

[0022] One end of the binding wire is wound around the wire drum, and the other end is connected to the product to be bound by passing through the A wheel, B wheel, C wheel, D wheel, E wheel and the positioning block with holes in sequence;

[0023] The direction of the wire binding between the E wheel and the positioning block with holes coincides with the axis of the wire hole of the positioning block with holes.

[0024] Furthermore, the lifting assembly in the lifting device includes a slide base, a first mounting frame, a slide, and a motor;

[0025] The first mounting frame fixes the slide base and the motor;

[0026] The motor drives the slide to move up and down along the slide base;

[0027] The lower side of the horizontal rotating platform is connected with the sliding platform through a horizontal rotating bearing.

[0028] Furthermore, the horizontal rotating device includes a device body, a rotating disk and a clamp;

[0029] The equipment body is placed on a workbench and is equipped with a driving mechanism for driving the rotating disk to rotate horizontally;

[0030] The rotating disk is installed above the device body, and the clamp is used to fix the battery pack on the rotating disk.

[0031] Furthermore, the pulling force generated by the horizontal rotation of the battery pack is 10N to 100N.

[0032] Furthermore, the material of the positioning block with holes is polytetrafluoroethylene.

[0033] A battery pack wire binding method, implemented using the above-mentioned battery pack wire binding device, comprises:

[0034] The horizontal rotating device drives the battery pack to be tied to rotate horizontally. The tension generated by the horizontal rotation of the battery pack passes through the hole positioning block and the D wheel, C wheel, B wheel and A wheel in sequence to reach the wire drum;

[0035] When the pulling force generated by the horizontal rotation of the battery pack is less than a predetermined value, the brake assembly in the constant force pay-off device brakes the wire drum;

[0036] When the tension generated by the horizontal rotation of the battery pack is greater than or equal to a predetermined value, the brake assembly in the constant force pay-off device releases the brake on the wire drum, and the wire drum passively pays off the wire;

[0037] While the horizontal rotating device rotates horizontally, the positioning block with holes in the lifting device rises or falls at a constant rate to achieve the winding of the binding wire on the battery pack.

[0038] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0039] (1) The present invention creatively proposes a battery pack wire binding device, which realizes passive constant force wire release through the design of the wheel group and the cooperation of the horizontal rotating equipment and the lifting equipment, effectively improving the wire binding quality, and avoiding the avalanche effect of one wire breaking due to uneven tension during the battery pack expansion process, thereby maximizing the reliability of the wire-binding battery pack and improving the problem of low efficiency of existing manual battery pack wire binding.

[0040] (2) The present invention cooperates with the pulley by designing a brake assembly to adaptively brake or release the brake according to the tension of the binding wire, thereby further improving the stability of the binding wire tension;

[0041] (3) The present invention utilizes the passive rotation of the positioning block with holes and the position coordination between the pulley and the positioning block with holes to solve the problem that the existing wire binding machine is prone to damage to the binding wire under the action of strong pulling force, and can also completely avoid the problem of wear of the binding wire on structural parts such as the wire hole;

[0042] (4) The present invention is applicable to battery packs of various shapes and can effectively solve the problem of uneven tension of special-shaped binding wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic structural diagram of a battery wire binding device according to the present invention;

[0044] Figure 2 It is a structural schematic diagram of the horizontal rotating device of the present invention;

[0045] Figure 3 It is a structural schematic diagram of the lifting equipment of the present invention;

[0046] Figure 4 This is a structural diagram of the constant force pay-off equipment of the present invention;

[0047] In the figure, 1-horizontal rotating device, 2-lifting device, 3-constant force pay-off device, 4-transmission frame, 5-bobbin, 6-battery pack; 101-device body, 102-rotating disk, 103-clamp; 201-slide base, 202-first mounting frame, 203-slide, 204-motor, 205-horizontal rotating bearing, 206-horizontal rotating table, 207-wire feeding cantilever, 208-positioning block with hole, 209-E wheel; 301-second mounting frame, 302-brake shaft, 303-brake belt, 304-bobbin mounting shaft, 305-brake transmission rod, 306-first balance bar, 307-balance shaft, 308-brake transmission rod end, 309-A wheel, 310-B wheel, 311-eccentric wheel, 312-second balance bar, 313-C wheel, 314-tension regulator, 401-D wheel. DETAILED DESCRIPTION

[0048] The following detailed description of the present invention will make the features and advantages of the present invention more clear and explicit.

[0049] The word "exemplary" is used exclusively herein to mean "serving as an example, example, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0050] The high expansion type (10% to 40% expansion rate) battery pack adopts the method of wire binding, which can reduce the weight of the battery pack to the greatest extent and is one of the best ways to lightweight design. In particular, the metal lithium secondary battery, whose specific energy is as high as 530Wh / kg, adopts the wire binding design to significantly reduce the weight of the battery pack, providing a better way to achieve high specific energy of the battery. However, the quality of the binding wire directly affects the quality of the binding wire of the battery module. If the binding force is not set uniformly, it is easy to produce an avalanche effect where if one wire breaks, all wires will break. At the same time, in order to improve production efficiency, the present invention designs a high expansion battery pack binding device, including a reasonable combination of horizontal rotation equipment, lifting equipment, constant force wire-releasing equipment and conveying rack, which is used to realize the binding of high expansion battery packs and ensure that the binding efficiency and binding quality meet the requirements.

[0051] Specifically, a battery pack wire binding device includes a horizontal rotation device 1, a lifting device 2, a constant force wire-paying device 3, a conveying frame 4, a wire drum 5 and a wheel group.

[0052] Optionally, the battery pack 6 is a long lithium-ion battery pack.

[0053] Optionally, the wheel set includes wheel A 309 , wheel B 310 , wheel C 313 and wheel D 401 , and optionally, also includes wheel E 209 .

[0054] Optionally, the battery pack 6 to be tied is fixed by a clamp on the rotating disk of the horizontal rotating device 1. The rotating disk of the horizontal rotating device 1 rotates, and the lifting device 2 rises or falls at a constant rate, and the binding wire is regularly wound around the battery pack 6.

[0055] Optionally, the rotating platform at the upper end of the lifting device 2 can rotate freely, and the center pulley (E wheel 209) - the wire hole alignment structure provided thereon can passively follow the changes in the binding wire position and change in real time, thereby realizing real-time passive rotation to align the wire outlet position of the battery pack 6 to avoid wear of the binding wire.

[0056] Optionally, the constant force pay-off device 3 is installed with a wire drum 5, and the binding wire of the wire drum 5 is connected to the battery pack 6 in sequence through the A wheel 309, the B wheel 310, the C wheel 313, the D wheel 401, the E wheel 209 and the wire hole; the A wheel 309 and the B wheel 310 are micro-wheels, which realize the change of position; the C wheel 313 is a swing wheel, which realizes the change of position and the sensing of tension at the same time. The D wheel 401 and the B wheel 310 form a stable ∠BCD, and the resultant force of the D wheel 401 and the B wheel 310 on the C wheel 313 can be kept constant. If there is no D wheel 401, when the E wheel 209 rises or falls, ∠BCD is not a constant value, the tension is uncertain, and the uniformity of the binding wire tension cannot be achieved.

[0057] During the rotation of the battery pack 6, the binding wire is pulled, and the constant force pay-out device 3 passively pays out the wire. When the pulling force does not meet the requirement, the wire drum 5 is in a braking state. When the pulling force meets the requirement, the C wheel 313 moves to the right, and the constant force pay-out device 3 automatically detects the displacement of the C wheel 313 or occurs linkage, and adjusts the braking force so that the wire drum 5 passively and continuously pays out the wire under constant tension. The binding wire release tension is preferably adjustable between 10N and 100N.

[0058] Optionally, the horizontal rotating device 1 includes a device body 101, a rotating disk 102, and a clamp 103. The rotating disk 102 can rotate horizontally relative to the device body 101. The clamp 103 is used to connect the battery pack 6 to the rotating disk 102. The battery pack 6 rotates with the rotating disk 102. The horizontal rotating device 1 provides the power for the binding wire tension.

[0059] Optionally, the lifting device 2 includes a slide base 201, a first mounting frame 202, a slide 203, a motor 204, a horizontal rotation bearing 205, a horizontal rotation platform 206, a wire feed arm 207, and a positioning block with a hole 208. The slide base 201 is fixed to the mounting frame 202, and the slide 203 is driven by the motor 204 to move up and down relative to the slide base 201. The slide 203 is connected to the horizontal rotation platform 206 via the horizontal rotation bearing 205, and the horizontal rotation platform 206 is connected to the positioning block with a hole 208 via the wire feed arm 207. The perforated positioning block 208 is away from the rotation center position, and the E wheel 209 is fixed at the rotation center position or near the center position above the horizontal rotating platform 206. Through this relative position setting, the rotation and alignment of the rotating platform can be achieved by constructing the minimum tension. The straight line formed by the binding wire connected to the perforated positioning block 208 through the E wheel 209 coincides with the hole axis of the perforated positioning block, which can achieve only minimal friction between the binding wire and the wire hole. The hole material of the perforated positioning block is a material with good lubrication performance, preferably polytetrafluoroethylene, to prevent scratching of the binding wire. The present invention uses the technology of aligning the center pulley with the cantilever wire hole to effectively solve the problems of irregular battery shape, wear of the binding wire, and easy wear of the wire-passing structure in the binding process of the long battery module, while improving production efficiency.

[0060] Optionally, the constant-force pay-off device 3 includes a first mounting frame 301, a brake shaft 302, a brake band 303, a spool mounting shaft 304, a brake transmission rod 305, a first balance bar 306, an eccentric wheel 311, a second balance bar 312, and a tension regulator 314. Wheels A 309 and B 310 are mounted on the first balance bar 306, while wheel C 313 is mounted on the second balance bar 312. The spool 5 is mounted on the spool mounting shaft 304. The mounting shaft 304 and the brake shaft 302 are fixedly connected concentrically. The contact between the brake shaft 302 and the brake band 303 generates braking friction. The tension regulator 314 and the brake transmission rod 305 are located at both ends of the balance shaft 307 on the first balance bar 306. When the C wheel 313 is pulled, the second balance bar 312 rotates, and the eccentric wheel 311 squeezes the brake transmission rod end 308 at one end of the first balance bar 306. The brake transmission rod end 308 moves downward, and the brake shaft 302 and brake band 303 begin to separate, creating a constant-force payout effect. When the tension on the C wheel 313 is too low, the tension adjuster 314 raises the brake transmission rod end 308, bringing the brake shaft 302 and brake band 303 into close contact and achieving full braking.

[0061] The following combination Figures 1 to 4 The present invention will be described in detail.

[0062] like Figure 1 As shown, a battery pack wire binding device comprises a horizontal rotating device 1, a lifting device 2, a constant force wire-paying device 3, a conveying frame 4, a wire drum 5, and a wheel assembly. The battery pack 6 to be wired is fixed to the rotating disk of the horizontal rotating device 1 by a clamp, and the constant force wire-paying device 3 is installed with the wire drum 5. The wire of the wire drum is connected to the battery pack 6 in sequence through the A wheel 309, the B wheel 310, the C wheel 313, the D wheel 401, the E wheel 209, and the wire holes. The rotating disk of the horizontal rotating device 1 rotates, and the lifting device 2 rises or falls at a constant rate at the same time, and the binding wire is regularly wound around the battery pack 6. A structure in which a central pulley and a positioning block with holes 208 are aligned with the wire holes is set on the rotating platform at the upper end of the lifting device 2, and the wire outlet position of the battery pack 6 is passively rotated in real time. The battery pack 6 is a long lithium-ion battery pack. During the rotation of the battery pack 6, the binding wire is pulled, and the constant force pay-out device 3 passively pays out the wire. When the pulling force does not meet the requirement, the binding drum 5 is in a braking state. When the pulling force meets the requirement, the C wheel 313 moves to the right, and the constant force pay-out device 3 automatically detects the displacement of the C wheel 313 or occurs linkage, adjusts the braking force, and makes the wire drum 5 passively and continuously pay out the wire under constant tension. The binding wire release tension is preferably adjustable between 10N and 100N.

[0063] like Figure 2The horizontal rotating device 1 is shown, comprising a device body 101, a rotating disk 102 and a clamp 103. The rotating disk 102 can rotate horizontally relative to the device body 101, and the clamp 103 is used to connect the battery pack 6 to the rotating disk 102. The battery pack 6 rotates as the rotating disk 102 rotates.

[0064] like Figure 3 The lifting device 2 is shown, which includes a slide base 201, a first mounting frame 202, a slide 203, a motor 204, a horizontal rotating bearing 205, a horizontal rotating platform 206, a wire feed cantilever 207, and a hole-carrying positioning block 208. The slide base 201 is fixed to the mounting frame 202, and the slide 203 can move up and down relative to the slide base 201 under the drive of the motor 204. The slide 203 is connected to the horizontal rotating platform 206 via the horizontal rotating bearing 205 above, and the horizontal rotating platform 206 is connected to the hole-carrying positioning block 208 via the wire feed cantilever 207. The hole-carrying positioning block 208 is away from the rotation center position. The E wheel 209 is fixed at the rotation center position or near the center position above the horizontal rotating platform 206. The straight line formed by the binding wire connecting the E wheel 209 to the hole-carrying positioning block 208 coincides with the axis of the hole of the hole-carrying positioning block. The hole of the hole-carrying positioning block is made of a material with good lubricity, preferably polytetrafluoroethylene.

[0065] like Figure 4 The constant-force pay-off device 3 is shown, comprising a second mounting frame 301, a brake shaft 302, a brake band 303, a spool mounting shaft 304, a brake transmission rod 305, a first balance bar 306, an eccentric wheel 311, a second balance bar 312, and a tension adjuster 314. Wheels A 309 and B 310 are mounted on the first balance bar 306, while wheel C 313 is mounted on the second balance bar 312. The spool 5 is mounted on the spool mounting shaft 304 and connected to the brake shaft 302. The contact between the brake shaft 302 and the brake band 303 generates braking friction. The tension adjuster 314 and the brake transmission rod 305 are located at both ends of the first balance bar 306 and the balance shaft 307. When the C wheel 313 is pulled, the second balance bar 312 rotates, and the eccentric wheel 311 squeezes the brake transmission rod end 308 of the first balance bar 306, causing the brake transmission rod end 308 to move downward. The brake shaft 302 and the brake band 303 begin to separate, creating a constant-force payout effect. If the tension on the C wheel 313 is too low, the tension adjuster 314 raises the brake transmission rod end 308, bringing the brake shaft 302 and the brake band 303 into close contact and achieving full braking.

[0066] The present invention has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present invention. Those skilled in the art will appreciate that various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present invention without departing from the spirit and scope of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be determined by the appended claims.

[0067] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A battery pack wire binding device, characterized in that: It comprises a horizontal rotating device (1), a lifting device (2), a constant force pay-off device (3), a conveying frame (4), a wire drum (5) and a wheel set; The horizontal rotation device (1) drives the battery pack (6) to be tied to rotate horizontally; The lifting device (2) comprises a lifting assembly and a positioning block with a hole (208), wherein the lifting assembly is used to drive the positioning block with a hole (208) to rise or fall; The wheel set includes wheel A (309), wheel B (310), wheel C (313) and wheel D (401); The constant force pay-off device (3) comprises a mounting mechanism and a brake assembly; the mounting mechanism is used to mount a wire drum (5), an A wheel (309), a B wheel (310) and a C wheel (313); one end of the binding wire is wound around the wire drum (5), and the other end is sequentially connected to a battery pack (6) through the A wheel (309), the B wheel (310), the C wheel (313), the D wheel (401) and a positioning block with a hole (208); The C wheel (313) rotates around a certain point on the constant force pay-off device (3) under the tension generated by the horizontal rotation of the battery pack (6); the D wheel (401) is fixed on the conveying frame (4); the conveying frame (4) is located between the constant force pay-off device (3) and the lifting device (2); and the angle ∠BCD formed by the binding wire through the B wheel (310), the C wheel (313) and the D wheel (401) is a constant value; The brake assembly is used to brake the bobbin (5) when the pulling force generated by the horizontal rotation of the battery pack (6) is less than a predetermined value, and to release the brake on the bobbin (5) when the pulling force generated by the horizontal rotation of the battery pack (6) is greater than or equal to the predetermined value.

2. A battery pack wire binding device according to claim 1, characterized in that: The mounting mechanism of the constant force pay-off device (3) comprises a second mounting frame (301), a bobbin mounting shaft (304), a first balancing rod (306) and a second balancing rod (312); The second mounting frame (301) is used to mount the bobbin mounting shaft (304), the first balancing pole (306) and the second balancing pole (312) from bottom to top; The bobbin mounting shaft (304) is connected to the second mounting frame (301) and can rotate relative to it. The bobbin mounting shaft (304) is used to support the bobbin (5). No relative rotation occurs between the bobbin mounting shaft (304) and the supported bobbin (5). The first balancing bar (306) is mounted on the second mounting frame (301). The A wheel (309) and the B wheel (310) are fixedly mounted on the first balancing bar (306). The C wheel (313) is fixedly mounted on the second balancing bar (312). Under the tension generated by the horizontal rotation of the battery pack (6), the second balancing bar (312) drives the C wheel (313) to rotate around a certain point on the second mounting frame (301).

3. A battery pack wire binding device according to claim 2, characterized in that: The brake assembly of the constant force pay-off device (3) comprises a brake shaft (302), a brake belt (303), a brake transmission rod (305), an eccentric wheel (311) and a tension regulator (314); The eccentric wheel (311) is mounted on the second mounting frame (301) via a rotating shaft. One end of the second balancing rod (312) is fixedly connected to the eccentric wheel (311), and the other end is mounted with a C wheel (313). The pulling force generated by the horizontal rotation of the battery pack (6) drives the C wheel (313) and the eccentric wheel (311) to rotate around the rotating shaft. The rotation of the eccentric wheel (311) achieves downward pressure or relaxation on the first end of the first balancing rod (306). The first balancing rod (306) is connected to the upper end of the transmission rod (305), the tension regulator (314), the A wheel (309) and the B wheel (310) in sequence from the first end to the second end; the first balancing rod (306) is rotatably connected to the second mounting frame (301) through the balancing shaft (307) at a position between the upper end of the transmission rod (305) and the tension regulator (314), and the tension regulator (314) applies a downward tension to the first balancing rod (306); the lower end of the transmission rod (305) is connected to one end of the brake belt (303), and the other end of the brake belt (303) is fixed; the brake shaft (302) is coaxial with the bobbin (5) and rotates synchronously with the bobbin (5), the brake belt (303) is U-shaped, and the brake shaft (302) Located between the two ends of the brake band (303); when the downward pressure of the eccentric wheel (311) on the first end of the first balance bar (306) overcomes the tension of the tension regulator (314), the first end of the first balance bar (306) drives one end of the brake band (303) to move downward through the transmission rod (305), and the brake band (303) is separated from the brake shaft (302) to release the brake; when the downward pressure of the eccentric wheel (311) on the first end of the first balance bar (306) cannot overcome the tension of the tension regulator (314), the tension of the tension regulator (314) causes the first end of the first balance bar (306) to lift up, and the transmission rod (305) drives one end of the brake band (303) to lift up, and the brake band (303) is tightly attached to the brake shaft (302) to achieve braking.

4. The battery pack wire binding device according to claim 1, characterized in that: The lifting device (2) further comprises a horizontal rotating platform (206), a wire feeding cantilever (207) and a horizontal rotating bearing (205); The hole-carrying positioning block (208) is installed above the horizontal rotating platform (206) through the wire feeding cantilever (207), and the bottom of the horizontal rotating platform (206) is installed on the lifting assembly through the horizontal rotating bearing (205). The lifting assembly is used to drive the horizontal rotating platform (206) and the hole-carrying positioning block (208) to rise or fall. The hole-carrying positioning block (208) is passively rotated by the horizontal rotating platform (206) under the tension generated by the horizontal rotation of the battery pack (6), so that the axis direction of the wire hole of the hole-carrying positioning block (208) changes in real time with the position of the binding wire.

5. A battery pack wire binding device according to claim 4, characterized in that: The wheel set further includes an E wheel (209), which is fixedly mounted on the rotation center of the horizontal rotating platform (206); One end of the binding wire is wound around the wire drum (5), and the other end is connected to the product to be bound by passing through the A wheel (309), the B wheel (310), the C wheel (313), the D wheel (401), the E wheel (209) and the positioning block with holes (208) in sequence; The direction of the wire binding between the E wheel (209) and the positioning block with holes (208) coincides with the axis of the wire hole of the positioning block with holes (208).

6. The battery pack wire binding device according to claim 4, characterized in that: The lifting assembly in the lifting device (2) includes a slide base (201), a first mounting frame (202), a slide (203) and a motor (204); The first mounting frame (202) is used to fix the slide base (201) and the motor (204); The motor (204) drives the slide (203) to move up and down along the slide base (201); The lower portion of the horizontal rotating platform (206) is connected to the sliding platform (203) via a horizontal rotating bearing (205).

7. The battery pack wire binding device according to claim 1, characterized in that: The horizontal rotating device (1) comprises a device body (101), a rotating disk (102) and a clamp (103); The device body (101) is placed on a workbench and is provided with a driving mechanism for driving the rotating disk (102) to rotate horizontally; The rotating disk (102) is installed above the device body (101), and the clamp (103) is used to fix the battery pack (6) on the rotating disk (102).

8. The battery pack wire binding device according to claim 1, characterized in that: The pulling force generated by the horizontal rotation of the battery pack (6) is 10N to 100N.

9. The battery pack wire binding device according to claim 1, characterized in that: The material of the positioning block with hole (208) is polytetrafluoroethylene.

10. A battery pack wire binding method, characterized in that: The battery pack wire binding device according to any one of claims 1 to 9 is implemented, comprising: The horizontal rotation device (1) drives the battery pack (6) to be tied to rotate horizontally, and the tension generated by the horizontal rotation of the battery pack (6) reaches the wire drum (5) through the hole positioning block (208) and the D wheel (401), the C wheel (313), the B wheel (310) and the A wheel (309) in sequence; When the pulling force generated by the horizontal rotation of the battery pack (6) is less than a predetermined value, the brake assembly in the constant force pay-off device (3) brakes the wire drum (5); When the pulling force generated by the horizontal rotation of the battery pack (6) is greater than or equal to a predetermined value, the brake assembly in the constant force wire-releasing device (3) releases the brake on the wire drum (5), and the wire drum (5) passively releases the wire; While the horizontal rotating device (1) rotates horizontally, the positioning block (208) with holes in the lifting device (2) rises or falls at a constant rate, thereby achieving the winding of the binding wire on the battery pack (6).

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