Unpacking tool and single battery

Abstract

The utility model discloses an unpacking tool and a single battery. The unpacking tool comprises a fixed seat and N rotary hole cutting assemblies, n > = 2; the N rotary hole cutting assemblies are installed on the fixing base side by side and rotate at the same time to cut all the single batteries, and then through holes are formed in all the single batteries. According to the unpacking tool, the through hole is directly formed in the single battery in a cutting mode, unpacking of the single battery can be achieved only through one-time unpacking process, operation is easy, the unpacking success rate is high, and the problem that a battery shell deforms is solved due to the fact that the through hole is formed in the cutting mode.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a package opening tool and a single battery. 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 areas of each single cell so that each single cell is exposed to a unified shared electrolyte, which reduces the differences between the single cells to a certain extent and improves the cycle life of the large-capacity battery.

[0005] During the manufacturing process of the above large-capacity batteries, a primary opening is first made on the shell of each finished single cell, and then a sealing mechanism is installed on the primary opening. The main function of the sealing mechanism is to seal the single cell and protect the electrolyte in the single cell from contact with the air. When the single cells are assembled to form a large-capacity battery, the sealing mechanism is detached from the single cell, and a secondary opening is formed on the shell of the single cell. Finally, the inner cavity of each single cell is connected through the secondary opening.

[0006] For example, a Chinese patent, publication number CN117477117A, discloses an opening tool. When the opening tool is used to open a single battery, a pull rod pulls a pull rope, and the pull rope links an opening rod. The opening rod provides a traction force perpendicular to the opening direction to detach the sealing mechanism from the single battery.

[0007] However, in actual operation, the above unpacking method has the following problems:

[0008] 1. The production process of large-capacity batteries is complicated and the assembly efficiency is low.

[0009] 2. When using an opening tool to open a single battery, excessive traction may cause the battery shell to deform. Utility Model Content

[0010] In order to solve the problem that in the existing large-capacity battery assembly process, single cells need to be unpacked twice, resulting in low assembly efficiency and low yield of large-capacity batteries and possible deformation of the battery shell, the utility model provides an unpacking tool.

[0011] To solve the above problems, the technical solution of the utility model is:

[0012] The first aspect of the utility model provides a package opening tool, which is used to form through holes on the outer shells of each single battery in a large-capacity battery; the package opening tool includes a fixed base and N rotating hole cutting components; N≥2; the N rotating hole cutting components are installed side by side on the fixed base, and the N rotating hole cutting components rotate simultaneously to cut each single battery, thereby forming a through hole on each single battery.

[0013] The packing opening tool of the utility model directly forms a through hole on the single battery by cutting, and the packing of the single battery can be opened by only one packing process, the operation is simple, and the success rate of packing opening is high. Moreover, the hole is opened by cutting, which avoids the problem of deformation of the battery shell.

[0014] Furthermore, the above-mentioned rotating hole cutting assembly includes a motor, a rotating bearing and a hole cutting knife; the motor is fixed on a fixed seat, and the output end of the motor is connected to the hole cutting knife; the blade of the hole cutting knife is installed on the fixed seat through a bearing, and the blade of the hole cutting knife is used to cut the single cell battery shell to form a through hole.

[0015] Furthermore, the above-mentioned hole cutting knife includes a connecting shaft and a knife barrel; one end of the connecting shaft is connected to the output end of the motor through a fixing screw, and the other end of the connecting shaft is connected to the outer surface of the closed end of the knife barrel, and the open end of the knife barrel is a blade.

[0016] Furthermore, a magnet is fixedly provided on the inner surface of the closed end of the knife barrel, an iron block is provided on the single battery, and the portion cut by the hole cutting assembly is recovered into the knife barrel by magnetic attraction, and then the portion cut after opening the package can be smoothly taken out.

[0017] Furthermore, in order to prevent the blade of the opening tool from causing damage to the inside of the single battery after the opening tool forms a through hole on the single battery shell, the above-mentioned fixed seat is provided with two limiting ribs on the large surface close to the blade, the knife barrel is located in the area between the two limiting ribs, the blade of the knife barrel protrudes from the area, and the height difference between the blade and the end face of the single battery close to the limiting rib is equal to the thickness of the single battery shell.

[0018] Furthermore, in order to arrange the cables driving the motor reasonably, a cable slot is provided on the large surface of the fixing seat away from the blade.

[0019] Furthermore, in order to facilitate the operator to open the package, a hand-held portion is provided at one end of the fixing seat.

[0020] Another aspect of the utility model provides a single cell battery, wherein an iron block is fixedly arranged on a shell of the single cell battery.

[0021] Compared with the prior art, the beneficial effects of the technical solution of the utility model are as follows:

[0022] The utility model adopts a hole cutting assembly to unpack the single cells in the large-capacity battery, and only needs to unpack the single cells once. Compared with the existing method that requires two unpackings when the single cells form a large-capacity battery, the reduction in the number of unpackings improves the production efficiency of the large-capacity battery, and also avoids the probability of unpacking misoperation as much as possible, thereby improving the yield rate of the large-capacity battery.

[0023] Moreover, compared with the existing tools that use traction to open the package, the use of cutting to open the hole avoids the problem of deformation of the battery casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the opening tool acting on a large-capacity battery;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the package opening tool;

[0026] Figure 3 is a cross-sectional view of a package opening tool;

[0027] Figure 4 for Figure 1 A cross-sectional view of

[0028] Figure 5 This is the appearance diagram of a single battery.

[0029] The accompanying drawings are marked as follows:

[0030] 1-box, 2-single battery, 3-electrolyte sharing channel, 100-unpacking tool, 4-fixed seat, 5-rotating hole cutting assembly, 6-motor, 7-rotating bearing, 8-hole cutting knife, 9-fixing sleeve, 10-connecting shaft, 11-knife cylinder, 12-fastening screw, 13-limiting rib, 14-cable slot, 15-handheld part, 16-magnet, 17-iron block. DETAILED DESCRIPTION

[0031] 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.

[0032] The phrase "in other embodiments" that appears in different places in this specification does not refer to the same embodiment, nor is it 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 specification can be understood according to specific circumstances.

[0033] 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 or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] The basic principle of the utility model is to extend the unpacking tool into the box of the large-capacity battery, directly open a hole on the outer shell of the single battery in the box by cutting, and then complete the unpacking of the single battery.

[0035] The structure of a large-capacity battery is as follows:

[0036] like Figure 1 and Figure 2 As shown, the large-capacity battery includes a box body 1 and a plurality of single cells 2; the plurality of single cells 2 are arranged in the box body 1 along the same direction;

[0037] The box body 1 is provided with an electrolyte sharing channel 3, which is connected to the inner cavity of all single cells 2. Through the electrolyte sharing channel 3, each single cell 2 can be placed in a unified electrolyte environment, ensuring the uniformity of the electrolyte in each single cell 2; improving the performance and charge and discharge cycle life of large-capacity batteries.

[0038] The electrolyte sharing channel 3 is a groove integrally formed at the bottom of the box and extending along the arrangement direction of the single cells, or two convex ribs extending along the arrangement direction of the single cells are arranged at the bottom of the box, and the area between the two convex ribs is the electrolyte sharing channel.

[0039] The single cell adopts a commercially available aluminum square lithium-ion battery, including an upper cover, a lower cover, a cylinder and a battery cell assembly; the battery cell assembly described here can also be called an electrode assembly, which is arranged in sequence by a positive electrode, a separator, and a negative electrode, and is assembled by a lamination or winding process. In some cases, the lower cover and the cylinder can also be formed as one piece.

[0040] The opening tool 100 provided in this embodiment includes a through hole formed on the outer shell of each single cell in the large-capacity battery, through which the inner cavity of the single cell and the electrolyte sharing channel on the box body can be connected; Figure 1 and Figure 2 As shown, the package opening tool includes a fixing base 4 and N rotary hole cutting assemblies 5; N≥2; the large-capacity battery in this embodiment has 13 single cells, so in this embodiment, there are 13 rotary hole cutting assemblies 5, and the 13 rotary hole cutting assemblies 5 are installed side by side on the fixing base 4, and the 13 rotary hole cutting assemblies 5 are driven to rotate simultaneously to cut each single cell 2, and then a through hole is formed on each single cell 2.

[0041] Specifically, the fixing seat 4 of the present embodiment is a long and thin plate, and 13 mounting holes for mounting the rotary hole cutting assembly 5 are formed on the long and thin plate.

[0042] Specifically, the rotary hole cutting assembly 5 of this embodiment includes a motor 6, a rotary bearing 7 and a hole cutting knife 8; the motor 6 is fixed to the fixing seat 4 through a fixing sleeve 9; and a rotary bearing 7 is installed in each mounting hole of the fixing seat 4;

[0043] The hole cutting knife 8 includes a connecting shaft 10 and a knife barrel 11; the connecting shaft 10 cooperates with the rotating bearing 7 in the fixed seat 4, one end of the connecting shaft 10 is connected to the output end of the motor 6 through a set screw 12, and the other end of the connecting shaft 10 is connected to the outer surface of the closed end of the knife barrel 11, and the open end of the knife barrel 11 is a blade.

[0044] During operation, the motor starts to rotate, and the knife barrel 11 starts to rotate driven by the connecting shaft 10 , thereby cutting a through hole on the outer shell of the single battery 2 .

[0045] Preferably, the large surface of the fixing seat 4 in this embodiment is provided with two limiting ribs 13 near the blade, the knife barrel 11 is located in the area between the two limiting ribs 13, the blade of the knife barrel 11 protrudes from the area, and the height difference between the blade and the end surface of the limiting rib 13 near the single cell is slightly greater than or equal to the thickness of the single cell shell. After the knife barrel 11 cuts the single cell shell, the unpacking tool moves toward the single cell as a whole, and the two limiting ribs contact the shell of each single cell, preventing the blade from damaging the inside of the single cell after the unpacking tool continues to move downward.

[0046] Preferably, since each rotary hole cutting assembly 5 utilizes the rotation of the motor 6, a power source is required to drive the motor 6 of each rotary hole cutting assembly 5 to work when the package opening tool is used. Therefore, a cable is required to connect the motor and the external power supply. In order to reasonably arrange the cables, a cable slot 14 is provided on the large surface of the fixing seat 4 away from the blade in this embodiment.

[0047] Preferably, a hand-held portion 15 is provided at one end of the fixing seat 4. The hand-held portion 15 facilitates the operator to perform the unpacking operation.

[0048] Preferably, in this embodiment, an iron block 17 is fixed to the position on the shell of the single battery 2 that needs to be unpacked by bonding, welding, etc., and the outer diameter of the iron block 17 is smaller than the inner diameter of the knife cylinder 11; a magnet 16 is fixedly provided on the inner surface of the closed end of the knife cylinder 11, and the part cut by the rotating hole cutting assembly 5 is recovered into the knife cylinder by magnetic attraction, and then the part cut after unpacking can be smoothly taken out.

[0049] Based on the above description of the unpacking tool structure, the process of using the unpacking tool to manufacture large-capacity batteries is now introduced:

[0050] 1. Place each single battery into the box. Make sure that one port of the box is not equipped with an end plate.

[0051] 2. Turn the large-capacity battery upside down with the bottom of the box facing upward, and then insert the opening tool into the electrolyte sharing channel from the unsealed port of the box, ensuring that the blades of the 13 rotating hole cutting components are in contact with the corresponding single battery shells;

[0052] 3. Connect the package opening tool to the external power supply, start the power supply, and the motors of each rotating hole cutting component start to rotate;

[0053] 4. The unpacking tool is driven to move slowly toward the single battery, and the hole cutters of each rotating hole cutting assembly cut the shell of the single battery. At the same time, the cut parts of each single battery are recovered into the knife barrel through magnetic attraction;

[0054] 5. Turn off the power and take out the unpacking tool;

[0055] 6. Use an end cover to weld and install on the open end of the box to complete the sealing of the box;

[0056] 7. Rotate the large-capacity battery 180 degrees and place it upright, then inject electrolyte into the box, so that each single battery is in a unified electrolyte system.

Claims

1. A packing opening tool for forming through holes on the outer shells of individual cells in a large-capacity battery; characterized in that: The package opening tool comprises a fixing seat and N rotating hole cutting components; N≥2; N rotating hole cutting assemblies are installed side by side on the fixing seat, and the N rotating hole cutting assemblies rotate simultaneously to cut each single battery, thereby forming a through hole on each single battery.

2. The package opening tool according to claim 1, characterized in that: The rotary hole cutting assembly includes a motor, a rotary bearing and a hole cutting knife; the motor is fixed on a fixed seat, and the output end of the motor is connected to the hole cutting knife; the blade of the hole cutting knife is installed on the fixed seat through a bearing, and the blade of the hole cutting knife is used to cut the single battery shell to form a through hole.

3. The package opening tool according to claim 2, characterized in that: The hole cutting knife comprises a connecting shaft and a knife cylinder; One end of the connecting shaft is connected to the output end of the motor through a set screw, and the other end of the connecting shaft is connected to the outer surface of the closed end of the knife cylinder, and the open end of the knife cylinder is a knife blade.

4. The package opening tool according to claim 3, characterized in that: A magnet is fixedly arranged on the inner surface of the closed end of the knife cylinder.

5. The package opening tool according to claim 4, characterized in that: The large surface of the fixing seat close to the blade is provided with two limiting ribs, the knife barrel is located in the area between the two limiting ribs, the blade of the knife barrel protrudes from the area, and the height difference between the blade and the end surface of the limiting rib close to the single cell is equal to the thickness of the single cell shell.

6. The package opening tool according to any one of claims 1 to 5, characterized in that: The large surface of the fixing seat away from the blade is provided with a cable slot.

7. The package opening tool according to claim 6, characterized in that: A hand-held portion is arranged at one end of the fixing seat.

8. A single cell battery, characterized in that: Using the package opening tool according to any one of claims 1 to 7, an iron block is fixedly provided on the single battery casing.

Images