Unpacking device

Abstract

The utility model provides an unpacking device. The unpacking device mainly solves the problems that unpacking of an existing large-capacity battery is difficult to operate and unreliable. The unpacking device comprises an operation pull rod, a pull rope and a check block. The operating pull rod is a hollow pipe fitting; the stop block is hinged to the end of the operation pull rod and can swing between a first position and a second position. The pull rope is connected with the stop block and used for rotating the stop block from the first position to the second position; when the stop block is at the first position, the operation pull rod penetrates through a pull ring of the single battery sealing mechanism; when the stop block is at the second position, the stop block is matched with the operation pull rod to axially limit a pull ring of the single battery sealing mechanism, and an axial pulling force is applied to the sealing mechanism when the operation pull rod moves, so that the sealing mechanism is separated from each single battery. According to the unpacking device, the sealing mechanism on each single battery can be reliably separated from each single battery, and meanwhile, the requirement on the operating force is relatively low, so that an operator can conveniently unpack.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a package opening device. Background Art

[0002] With the further development of lithium-ion batteries in recent years, the application scenarios of lithium-ion batteries have become more and more extensive, especially some use scenarios that require relatively large battery capacity. For example: automotive power batteries, energy storage batteries that constitute household photovoltaic and energy storage integrated devices, and batteries that constitute energy storage systems for power plants.

[0003] In the above usage scenarios, in order to meet the larger capacity requirements, the existing practice is to connect multiple single cells in series and parallel to form a large-capacity battery. However, due to the differences between the single cells in the above large-capacity battery, the uniformity of the single cells in the large-capacity battery is poor, which directly leads to the limitation of the capacity and cycle life of the large-capacity battery.

[0004] To solve the above problems, existing large-capacity batteries connect the electrolyte area and gas area of ​​each single cell, so that each single cell is in a unified shared electrolyte and gas system, which reduces the differences between each single cell to a certain extent and improves the cycle life of large-capacity batteries.

[0005] When the single cells are assembled to form a large-capacity battery, each single cell needs to be unpacked to form an opening on the single cell, thereby connecting the electrolyte area and the gas area of ​​each single cell.

[0006] In the prior art, a pull rope is generally used to open the single battery. When the pull rope is used to open the package, the pull rope needs to be passed through the pull rings of all the single batteries, and then the sealing mechanisms of all the single batteries are opened at the same time by the pull rope. This opening method requires a certain amount of operating force, is difficult to operate, and is not convenient for on-site operation. At the same time, this opening method is difficult to open all the sealing films at once, and the sealing mechanisms of some single batteries may not be effectively opened or the opening formed by opening is small. Therefore, this opening method also has the problem of unreliable opening. Utility Model Content

[0007] The utility model provides a package opening device, which mainly solves the problems of difficult operation and unreliable package opening of existing large-capacity batteries.

[0008] To solve the above problems, the technical solution of the utility model is:

[0009] A package opening device comprises an operating rod, a pull rope and a block; the operating rod is a hollow tube; the block is hinged at the end of the operating rod and can swing between a first position and a second position, the first position being a position where the block is parallel to the operating rod, and the second position being a position where the block is perpendicular to the operating rod; the pull rope is connected to the block and is used to rotate the block from the first position to the second position; when the block is in the first position, the block and the operating rod pass through a pull ring on a single cell sealing mechanism; when the block is in the second position, the block cooperates with the operating rod to axially limit the pull ring of the single cell sealing mechanism, and applies axial tension to the sealing mechanism when the operating rod moves, so as to separate the sealing mechanism from each single cell.

[0010] Furthermore, a return spring is also included, one end of which is connected to the stopper, and the other end of which is connected to the operating rod, and is used to restore the stopper from the second position to the first position.

[0011] Furthermore, the stopper and the operating rod are both provided with mounting ears, and the two ends of the return spring are respectively connected to the stopper and the operating rod through the mounting ears.

[0012] Furthermore, rope holes are respectively provided on the side walls at both ends of the operating pull rod, and the pull rope is arranged in the inner cavity of the operating pull rod, with its two ends passing through the rope holes respectively, one end is connected to the stopper, and the other end is used to apply force.

[0013] Furthermore, a pin is provided on the stopper, and the pull rope is fixed on the pin.

[0014] Furthermore, it also includes a handle and a grip rod; the handle is fixed to one end of the operating pull rod away from the stopper, the grip rod is hinged on the handle, and the pull rope is connected to the grip rod for pulling the pull rope when the grip rod rotates relative to the handle.

[0015] Furthermore, connecting ears are respectively provided at both ends of the hinged side of the grip rod, and the grip rod is hinged to the handle through the connecting ears. Meanwhile, a fixing rod is provided between the two connecting ears, and the pull rope is connected to the fixing rod.

[0016] Furthermore, the end of the stopper has a wedge-shaped surface, and the wedge-shaped surface protrudes from the end of the operating rod.

[0017] Furthermore, the cross section of the operating rod is circular.

[0018] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0019] 1. When the unpacking device of the utility model unpacks a single battery, when the block is in the first position, it passes through the pull ring on the sealing mechanism of the single battery together with the operating pull rod; when the block rotates to the second position, the block cooperates with the operating pull rod to axially limit the pull ring of the sealing mechanism of each single battery, and when the operating pull rod moves, an axial pulling force is applied to the sealing mechanism to separate the sealing mechanism from each single battery. The unpacking device can reliably separate the sealing mechanism on each single battery from each single battery, and the requirement for operating force is relatively small, which is convenient for the operator to perform the unpacking operation. At the same time, the unpacking device unpacks each single battery in turn, which can ensure that the sealing mechanism of all single batteries can be opened, and the unpacking reliability is good.

[0020] 2. In the unpacking device of the utility model, the return spring can automatically restore the block from the second position to the first position, so as to facilitate the unpacking of the next single battery, thereby improving the unpacking efficiency of the unpacking device. At the same time, the two ends of the return spring are respectively connected to the block and the operating rod through the mounting ears, and the connection is convenient and reliable.

[0021] 3. In the package opening device of the utility model, the drawstring is arranged in the inner cavity of the operating rod, and its two ends pass through the rope threading holes respectively, one end is connected to the stopper, and the other end is used to apply the force. This installation method of the drawstring makes the whole package opening device more beautiful, and at the same time, it is also convenient to store the drawstring.

[0022] 4. In the package opening device of the utility model, a pin is provided on the stopper, and the drawstring is fixed on the pin. This structure facilitates the connection and removal of the drawstring, and the connection of the drawstring is also relatively firm.

[0023] 5. The package opening device of the utility model also includes a handle and a grip rod; a pull rope is connected to the grip rod, and is used to pull the pull rope when the grip rod rotates relative to the handle, so as to quickly and accurately pull the block rod from the first position to the second position, and the operability is good.

[0024] 6. In the unpacking device of the utility model, the end of the block has a wedge-shaped surface, which protrudes from the end of the operating pull rod. The wedge-shaped surface makes the size of the end of the block much smaller than the size of the through hole on the pull ring. The block can accurately and quickly pass through the through hole on the pull ring of the single cell sealing mechanism, further improving the unpacking efficiency.

[0025] 7. In the package opening device of the utility model, the cross section of the operating rod is circular, and the circular operating rod reduces the friction interference between the operating rod and the single battery during the sliding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the package opening device in the embodiment;

[0027] Figure 2 A partial schematic diagram of the package opening device in the embodiment Figure 1;

[0028] Figure 3 A partial schematic diagram of the package opening device in the embodiment Figure 2 ;

[0029] Figure 4 is a schematic diagram of a stopper in the package opening device in the embodiment being located at a first position;

[0030] Figure 5 is a schematic diagram of a stopper in the package opening device in the embodiment being located at the second position;

[0031] Figure 6 A schematic diagram of providing a sealing mechanism for each single cell;

[0032] Figure 7 A schematic diagram of an unpacking device unpacking a single battery in an embodiment;

[0033] Figure 8 This is a schematic diagram of the structure of a first type of large-capacity battery in the embodiment;

[0034] Fig. 9 Schematic diagram of the structure of a second large-capacity battery in the embodiment.

[0035] The accompanying drawings are marked as follows: 1-single battery, 2-sealing mechanism, 3-packing device, 4-hollow component, 5-outer shell, 21-sealing film, 22-pull ring, 31-operating pull rod, 32-pull rope, 33-stopper, 34-reset spring, 35-mounting ear, 36-pin shaft, 37-handle, 38-grip rod, 311-rope threading hole, 331-wedge surface, 381-connecting ear piece, 382-fixing rod, 41-liquid filling port, 42-shared chamber, 51-liquid filling port, 52-shared chamber. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary persons in the field without creative work should fall within the scope of protection of the utility model.

[0037] The phrase "in other embodiments" that appears in different places in this specification does not refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. In this specification, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] At the same time, in the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "top and bottom" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] The existing large-capacity battery includes a plurality of monomer cells arranged in sequence, and the electrolyte area and gas area of ​​each monomer cell are connected through a shared chamber, so that each monomer cell is in a unified shared electrolyte and gas system, which reduces the differences between the monomer cells to a certain extent and improves the cycle life of the large-capacity battery. When the above monomer cells form a large-capacity battery, it is necessary to unpack each monomer cell, that is, to form an opening on each monomer cell so that the inner cavity of each monomer cell is connected to the shared chamber. In order to facilitate the formation of openings on the monomer cells when forming a large-capacity battery, the monomer cells are generally processed as follows in the early stage: a through hole is processed on the monomer cell, and a sealing mechanism is added to the through hole. The sealing mechanism mainly includes a sealing film for sealing the through hole and a pull ring arranged on the sealing film. The specific structure is detailed in patent CN219144319U; in the sealing mechanism, the function of the sealing film is mainly to seal the monomer cell and protect the electrolyte in the monomer cell from contact with the air. The function of the pull ring is to cooperate with the unpacking device to open the sealing film.

[0040] In order to facilitate the unpacking operation of each single cell in a large-capacity battery, this embodiment provides an unpacking device, which detaches the sealing mechanism on each single cell from each single cell to connect each single cell with the shared chamber, thereby achieving mutual communication of electrolyte and gas of each single cell.

[0041] like Figures 1 to 5As shown, the unpacking device 3 provided in this embodiment includes an operating rod 31, a pull rope 32 and a stopper 33; the operating rod 31 is a long hollow tube, and its length is adapted to the length of each single battery 1 after arrangement, and can perform corresponding unpacking operations on all single batteries 1 in a large-capacity battery. Its cross-section is generally circular or square. In this embodiment, the operating rod 31 is a hollow round rod. The structure of the hollow round rod reduces the friction interference between the operating rod 31 and the single battery 1 during the sliding process, and facilitates the operating rod 31 to perform corresponding unpacking operations. The stopper 33 is hinged at the end of the operating rod, and can swing between a first position and a second position, such as Figure 4 and Figure 5 As shown, the first position specifically refers to the position where the block 33 is parallel to the operating rod 31, and the second position specifically refers to the position where the block 33 is perpendicular to the operating rod 31; that is, when the block 33 is in the first position, the center line of the block 33 is parallel to the center line of the operating rod 31, and when it is in the second position, the center line of the block 33 is perpendicular to the operating rod 31. The pull rope 32 is connected to the block 33 and is used to pull the block 33 to rotate the block 33 from the first position to the second position. When the block 33 is in the first position, the block 33 and the operating rod 31 pass through the pull ring 22 of the sealing mechanism 2 of the single battery 1; when the block 33 is in the second position, the block 33 cooperates with the operating rod 31 to axially limit the pull ring 22 of the sealing mechanism 2 of the single battery 1, and applies axial tension to the sealing mechanism 2 when the operating rod moves, so as to separate the sealing mechanism 2 from each single battery 1. The axial direction in this embodiment specifically refers to the direction parallel to the center line of the operating rod.

[0042] It should be noted that the block 33 and the operating rod 31 need to pass through the through hole in the pull ring 22 of the sealing mechanism 2 when opening the package. Therefore, the size of the block 33 and the operating rod 31 must be smaller than the size of the through hole in the pull ring 22. Figure 2 As shown, a wedge-shaped surface 331 can be set at the end of the block 33. The wedge-shaped surface 331 protrudes from the end of the operating rod 31. The wedge-shaped surface 331 makes the end size of the block 33 much smaller than the size of the through hole on the pull ring. The block 33 can accurately and quickly pass through the through hole on the pull ring 22 of the sealing mechanism 2 of the single battery 1, thereby improving the unpacking efficiency.

[0043] The pull rope 32 is generally made of a flexible rope, which mainly provides the force when the stopper 33 rotates from the first position to the second position. The length of the pull rope 32 is generally equivalent to that of the operating rod 31. During installation, one end of the pull rope 32 is connected to the stopper 33, and the other end extends outside the shared chamber. Figure 2 and Figure 3As shown, the side walls at both ends of the operating rod 31 are respectively provided with rope holes 311, and the pull rope 32 is arranged in the inner cavity of the operating rod 31, and its two ends respectively pass through the rope holes 311, one end is connected to the block 33, and the other end is used to apply a force. This installation method of the pull rope 32 makes the entire unpacking device 3 more aesthetically pleasing, and at the same time, it is also convenient to store the pull rope 32. In other embodiments, the pull rope 32 can also be installed externally, that is, the pull rope 32 is installed on the outside of the operating rod 31, but this installation method is less aesthetically pleasing. At the same time, after the pull rope 32 is installed externally, it is easy to come into contact with each single battery 1 when unpacking, and even cause hidden dangers such as friction interference or scratches.

[0044] like Figure 2 As shown, in order to facilitate the above-mentioned pull rope 32 to pass through the rope hole 311 and connect with the stopper 33, a pin 36 can be set on the stopper 33, and the pull rope 32 is fixed on the pin 36. The pin 36 is used to fix the rope hole 311, which not only facilitates the connection and removal of the pull rope 32, but also makes the connection of the pull rope 32 more secure.

[0045] like Figure 3 As shown, in order to facilitate the pull rope 32 to apply force to the stopper 33, one end of the operating rod 31 is provided with a handle 37 and a grip 38; the handle 37 is fixed to the end of the operating rod 31 away from the stopper 33, the grip 38 is hinged on the handle 37, and the pull rope 32 is connected to the hinged end of the grip 38. When the grip 38 rotates relative to the handle 37, the pull rope 32 is pulled, and the pull rope 32 quickly and accurately pulls the stopper 33 from the first position to the second position. When specifically connected, connecting ears 381 are respectively provided at both ends of the hinged side of the grip 38, and the grip 38 is hinged to the handle 37 through the connecting ears 381. At the same time, there is a fixed rod 382 between the two connecting ears 381, and the pull rope 32 is connected to the fixed rod 382.

[0046] After the unpacking device 3 unpacks a single battery 1 in the large-capacity battery, the next unpacking device 3 needs to unpack. At this time, the stopper 33 needs to be restored from the second position to the first position. Specifically, the following method can be used to achieve the above reset:

[0047] First, after the previous single battery 1 is unpacked, the unpacking device is taken out of the shared chamber as a whole, manually reset, and then the unpacking device is extended into the shared chamber to unpack the next single battery. This reset method is relatively cumbersome.

[0048] Second, if Figure 2As shown, a reset spring 34 is added, one end of the reset spring 34 is connected to the block 33, and the other end is connected to the operating pull rod 31. When unpacking, the force on the pull rope 32 needs to be greater than the force of the reset spring 34, and the block 33 is rotated from the first position to the second position to perform the corresponding unpacking operation. After the unpacking is completed, the force on the pull rope 32 disappears. At this time, under the force of the reset spring 34, the block 33 is restored from the second position to the first position; and the unpacking operation of the next single battery 1 is continued.

[0049] In the above two methods, the reset spring 34 is easy to install and can reliably and accurately reset the block 33, which is a recommended reset structure. When the reset spring 34 is specifically connected, the block 33 and the operating rod 31 are both provided with mounting ears 35, and the mounting ears 35 are specifically fixed blocks with mounting holes. At this time, the two ends of the reset spring 34 are respectively connected to the block 33 and the operating rod 31 through the mounting ears 35, and the connection is very convenient and reliable.

[0050] The above-mentioned opening device 3 is mainly used to separate the sealing mechanism on each single battery 1 from the battery shell of the single battery 1 to form an opening on the battery shell of each single battery 1. The sealing film of the existing sealing mechanism is generally made of a circular shape, but the circular sealing film is subjected to a relatively uniform force and is not easy to be pulled open. Figure 6 As shown, the sealing film 21 can be made into an elliptical sealing film. Since the two ends of the elliptical sealing film are subjected to the smallest force, the pull ring 22 can be installed at the end of the elliptical sealing film 21. At this time, it is easier to detach the sealing film 21 from the single battery 1 through the pull ring 22.

[0051] Based on the single cell 1, this embodiment provides the following large-capacity batteries in different structural forms.

[0052] The first type of large capacity battery:

[0053] like Figure 8As shown, the large-capacity battery includes a battery pack body and a hollow component 4. The battery pack body includes a plurality of single cells 1 arranged in sequence. The number of single cells 1 can be adjusted according to the actual capacity requirements, and each single cell 1 is connected in parallel through an electrical connector. The above-mentioned hollow component 4 is a split structure, mainly composed of a hollow box body with an open end and a cover plate for covering the open end; the number of hollow components 4 is set according to demand. When there is only one hollow component 4, the hollow component 4 is fixedly connected to the side wall of the battery pack body. The hollow component 4 realizes the interconnection of the electrolyte area and the gas area of ​​each single cell 1. The specific structure is detailed in Chinese patent CN117477063A. When there are multiple hollow components 4, one of the hollow components 4 is fixedly connected to the upper cover plate of the single battery 1, so that the gas areas between the single batteries 1 are interconnected, and the inner cavity of the hollow component 4 is a gas sharing chamber. Another hollow component 4 is connected to the lower cover plate of the single battery 1, so that the electrolyte areas between the single batteries 1 are interconnected, and the inner cavity of the hollow component 4 is a shared electrolyte chamber. For details of the specific structure, please refer to Chinese patent CN219892382U.

[0054] The hollow member 4 is provided with a liquid injection port 41, through which electrolyte can be injected into the inner cavity of each single battery 1 and the hollow member 4, so as to inject, replenish or replace electrolyte for a large-capacity battery. The liquid injection port 41 can also be used as an operation port to complete the unpacking operation of the single battery 1. It should be noted that when liquid is not injected, the liquid injection port 41 needs to be sealed by a plug or a valve.

[0055] In the process of manufacturing large-capacity batteries, the single cells 1 are connected to the hollow component 4, and then under specific conditions, the sealing mechanism 2 on each single cell 1 is detached from each single cell 1 through the above-mentioned unpacking device 3, and the inner cavity of each single cell 1 is connected to the shared chamber 42, thereby achieving the purpose of the electrolyte inside each single cell 1 being in the same electrolyte system.

[0056] The second type of large capacity battery:

[0057] like Fig. 9 As shown, the large-capacity battery in this embodiment includes an outer shell 5 and a plurality of single cells 1; the number of single cells 1 can be adjusted according to actual capacity requirements, and the plurality of single cells 1 are placed side by side in the outer shell 5, and the top and bottom of the outer shell 5 are respectively provided with shared chambers 52, so that the gas area and the electrolyte area of ​​each single cell 1 can be interconnected. A through hole is opened at the top of the outer shell 5 at the position corresponding to the polarity terminal of each single cell 1; the polarity terminals of each single cell 1 pass through the through hole to realize the parallel connection of each single cell 1.

[0058] The outer shell 5 is provided with a liquid injection port 51, through which electrolyte can be injected into the inner cavity of each single battery 1 and the outer shell 5, so as to inject, replenish or replace electrolyte for a large-capacity battery. The liquid injection port 51 can also be used as an operation port to complete the unpacking operation of the single battery 1. It should be noted that when liquid is not injected, the liquid injection port 51 needs to be sealed by a plug or a valve.

[0059] In the process of manufacturing a large-capacity battery, after the single cell 1 is installed in the large-capacity battery, the sealing mechanism 2 on each single cell 1 is detached from each single cell 1 through the above-mentioned unpacking device 3 under specific conditions, and the inner cavity of each single cell 1 is connected with the shared chamber 52, thereby achieving the purpose of the electrolyte inside each single cell 1 being in the same electrolyte system.

[0060] The unpacking device 3 in this embodiment can unpack the single cells 1 in the large-capacity batteries of different structures. The following describes the unpacking process of the sealing mechanism 2 at the bottom of each single cell 1 for the large-capacity battery of the second structure, which is carried out in a set environment. Under normal circumstances, the set environment is preferably an environment with a dew point standard of -25℃ to -40℃, a temperature of 23℃±2℃, and a cleanliness level of 100,000. The unpacking device 3 detaches the sealing mechanism 2 of each single cell 1 from each single cell 1 in turn, and forms an opening on each single cell 1, such as Figure 7 As shown, the specific process is as follows:

[0061] S1. Turn over the entire large-capacity battery as a whole. At this time, the polarity terminals of each single battery 1 are located at the bottom, and the lower cover of each single battery 1 is located at the top. Then, remove the plugging piece or valve on the liquid injection port 51 of the outer shell 5;

[0062] S2, insert the operating rod 31 from the liquid injection port 51, and slide the operating rod 31 along the arrangement direction of each single battery 1;

[0063] S3, when the operating rod 31 reaches above the first single battery 1, the block 33 is in the first position, and the operating rod 31 is continued to be moved, and the block 33 and the operating rod 31 pass through the through hole of the sealing mechanism 2 of the first single battery 1; then, the handle 37 and the grip 38 are pinched, and the pull rope 32 is pulled, and the pull rope 32 rotates the block 33 from the first position to the second position. When the block 33 is in the second position, it cooperates with the operating rod 31 to axially limit the pull ring 22 of the sealing mechanism 2 of the single battery 1; then, the handle 37 and the grip 38 are operated to pull the operating rod and the pull rope 32 outward as a whole, and an axial tension is applied to the sealing mechanism 2 when the operating rod moves, so as to hook and pull the pull ring 22, so as to separate the sealing mechanism 2 from each single battery 1; finally, the grip 38 is released, and the force on the pull rope 32 disappears. Under the action of the return spring 34, the block 33 returns to the first position from the second position;

[0064] S4, repeat step S3 to unpack the second single battery 1, the third single battery 1, ... the Nth single battery 1;

[0065] S5, after all the single batteries 1 are unpacked, the entire unpacking device 3 is taken out and the liquid injection port 51 is sealed;

[0066] S6. Turn the entire large-capacity battery over as a whole. At this time, the electrolyte chambers of the individual cells 1 are connected to the shared chamber 52 at the bottom of the outer shell 5, so that the electrolytes can flow mutually.

[0067] It can be seen from the above process that the unpacking device 3 in this embodiment can reliably detach the sealing mechanism 2 of each single battery 1 from the single battery 1. At the same time, when the unpacking device 3 is taken out from the shared chamber, the sealing mechanism 2 of each single battery 1 is taken out simultaneously with the unpacking device 3, thereby preventing the sealing mechanism 2 from being retained in the hollow member 4 after each single battery 1 is unpacked and affecting the large-capacity battery. In addition, the above unpacking device 3 has a simple overall structure, fewer parts, a simple manufacturing process, and a low manufacturing cost.

Claims

1. A package opening device, characterized in that: It includes an operating lever, a pull rope and a stopper; The operating pull rod is a hollow tube; The stopper is hinged at the end of the operating rod and can swing between a first position and a second position, the first position being a position where the stopper is parallel to the operating rod, and the second position being a position where the stopper is perpendicular to the operating rod; The pull rope is connected to the stopper and is used to rotate the stopper from the first position to the second position; When the stopper is in the first position, it and the operating rod pass through the pull ring on the sealing mechanism of the single cell; when the stopper is in the second position, it cooperates with the operating rod to axially limit the pull ring of the sealing mechanism of the single cell, and applies axial pulling force to the sealing mechanism when the operating rod moves, so as to separate the sealing mechanism from each single cell.

2. The package opening device according to claim 1, characterized in that: It also includes a return spring, one end of which is connected to the stopper, and the other end of which is connected to the operating pull rod, and is used to restore the stopper from the second position to the first position.

3. The package opening device according to claim 2, characterized in that: The stopper and the operating pull rod are both provided with mounting ears, and the two ends of the return spring are respectively connected to the stopper and the operating pull rod through the mounting ears.

4. The package opening device according to claim 1, characterized in that: The side walls at both ends of the operating pull rod are respectively provided with rope threading holes, the pull rope is arranged in the inner cavity of the operating pull rod, and its two ends respectively pass through the rope threading holes, one end is connected to the stopper, and the other end is used to apply a force.

5. The package opening device according to claim 4, characterized in that: The stopper is provided with a pin shaft, and the pull rope is fixed on the pin shaft.

6. The package opening device according to any one of claims 1 to 5, characterized in that: It also includes a handle and a grip rod; the handle is fixed to one end of the operating pull rod away from the stopper, the grip rod is hinged on the handle, and the pull rope is connected to the grip rod for pulling the pull rope when the grip rod rotates relative to the handle.

7. The package opening device according to claim 6, characterized in that: Connecting lugs are respectively arranged at the two ends of the hinged side of the grip rod, and the grip rod is hinged to the handle through the connecting lugs. Meanwhile, a fixing rod is arranged between the two connecting lugs, and the pull rope is connected to the fixing rod.

8. The package opening device according to claim 6, characterized in that: The end of the stopper has a wedge-shaped surface, and the wedge-shaped surface protrudes from the end of the operating rod.

9. The package opening device according to claim 6, characterized in that: The cross section of the operating rod is circular.

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