Metal shell battery independent pressurization formation device and pressure formation method

Abstract

The invention belongs to the technical field of battery formation, and particularly relates to a metal shell battery independent pressurizing formation device and a pressurizing formation method, the metal shell battery independent pressurizing formation device comprises a formation body, a pressurizing module and a battery positioning clamp; a formation space and a plurality of pressurizing modules are arranged in the formation body. The pressurizing module comprises a mounting plate, a movable pressing plate, a fixed pressing plate, a driving mechanism, a pressure sensing assembly and a power connection assembly; the mounting plate is provided with a driving mechanism, the driving mechanism is provided with a driving part extending from one side of the mounting plate, the movable pressing plate is arranged on one side of the driving part, and the fixed clamping plate and the movable clamping plate are oppositely arranged and form a battery clamping position; the pressure sensing assembly is arranged on one side of the fixed clamping plate or the movable clamping plate and used for sensing pressure applied to the battery by the driving mechanism; the power connection assembly is arranged on one side of the battery clamping position, the power connection assembly is connected with the moving mechanism, and the moving mechanism drives the power connection assembly to move towards the inner side of the battery clamping position to be electrically connected with the battery; and the battery positioning clamp is used for keeping the battery in the battery clamping position.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery formation, and particularly relates to an independent pressurization formation device for a metal shell battery. Background Art

[0002] A battery cell refers to a product that can activate active substances through charging after discharging and can be used continuously. Battery cells are widely used in electrical equipment, such as mobile phones, laptop computers, power tools, vehicles, etc. In the development of battery technology, how to ensure the safety of battery cells is one of the research directions in battery technology.

[0003] In order to overcome the above technical defects, the published literature of a Chinese patent application with publication number CN119133731A discloses a battery cell, a metal shell, and an electrical equipment. The battery cell includes a shell assembly and an electrode core. The shell assembly includes a metal shell and a cover body. The metal shell includes a bottom plate and a side plate. The bottom plate and the side plate enclose an electrode core accommodation cavity with an opening. The side plate includes a flanging structure. The flanging structure includes more than two flanges. The more than two flanges are connected in sequence. A buffer space is formed between any two adjacent flanges. One flange adjacent to the cover body is connected to the cover body. The cover body closes the electrode core accommodation cavity. The electrode core is disposed in the electrode core accommodation cavity. When the battery cell is subjected to an impact force such that the electrode core moves relative to the shell assembly, when the electrode core impacts the metal shell, the area of the flanging structure on the side plate that is subjected to the impact force can first be stressed and expand outwardly deformed, so that the flanging structure unfolds. During the unfolding process of the flanging structure, the impact force of the electrode core can be effectively absorbed, thereby effectively reducing the impact force that needs to be borne by the connection area between the metal shell and the cover body. Therefore, the battery cell can effectively absorb the impact energy of the electrode core through the flanging structure, reduce the load borne by the connection area between the metal shell and the cover body, thereby reducing the possibility of separation of the connection area between the metal shell and the cover body, and reducing the possibility of electrolyte leakage of the battery cell.

[0004] In addition, the method of using a welding process between the metal shell and the cover body can make the connection between the metal shell and the cover body easier, facilitating the connection operation between the metal shell and the cover body, and effectively ensuring the sealing between the metal shell and the cover body. Taking the metal shell as a steel shell as an example for illustration. A stainless steel blank is stamped using a punching device and a stamping die to obtain a stainless steel shell. The stainless steel shell includes a bottom plate and a side plate. The side plate has one flange. Then, through a bending device and a bending die, the number of flanges is increased on the basis of the stainless steel shell and the metal shell is formed by processing. The flanging angle and the structure of the flanges are controlled by the bending die. The electrode core is placed in the electrode core accommodation cavity of the metal shell, and then the metal shell and the cover body are welded. After passing through processes such as vacuum drying, electrolyte injection, standing, and formation, the battery cell is formed.

[0005] The production process of the single battery disclosed in the above patent literature generally includes the first half of the battery production process and the second half of the formation and grading process. The processes in the first half can be divided into positive paste spreading, negative paste spreading, positive electrode sheet, negative electrode sheet, steel shell assembly, liquid injection, detection, packaging, etc. In the second half of the production process, the formation and grading of the battery are crucial for meeting the requirements of indicators such as the consistency and yield of the battery cells, and are an important part of the activation detection of the battery cells. After the production of the single battery cells is completed, due to the constraints of the battery production process, the parameter consistency in terms of capacity, voltage, current, internal resistance, etc. is not high. Therefore, it is necessary to perform formation and grading on the battery to maintain the consistency of the lithium battery cells.

[0006] For example, the Chinese invention patent application document with the publication number CN119627273A discloses a high-temperature and high-pressure formation device for lithium batteries in a laboratory, which can be used for the formation of metal shell batteries. The formation device includes a frame assembly, a pressure fixture assembly, a counterweight module assembly, an electrical component, a cylinder assembly, and a control panel assembly. A first partition board is provided in the middle inside the frame assembly, and the pressure fixture assembly is provided on the first partition board. A counterweight module assembly is provided on one side of the pressure fixture assembly. A second partition board is provided in the lower part inside the frame assembly, and the electrical component is provided on the second partition board. A cylinder assembly is provided on one side of the electrical component. The cylinder of the cylinder assembly is connected to the pressure fixture assembly. A control panel assembly is provided on the top of the frame assembly. The electrical component is electrically connected to the pressure fixture assembly, the counterweight module assembly, and the cylinder assembly respectively. The control panel assembly is electrically connected to the pressure fixture assembly, the counterweight module assembly, the electrical component, and the cylinder assembly respectively. The pressure fixture assembly includes a pressure bottom plate, a gravity block bottom plate, gravity blocks, a pressure test fixture, a pressure linear bearing, a pressure guide plate, a pressure guide rod, a lithium battery mounting plate, and a pressure sensor component. A round hole is provided in the middle of the pressure bottom plate. The gravity block bottom plate is provided on the pressure bottom plate. The gravity blocks are provided on the gravity block bottom plate. One end of the pressure guide rod is connected to the four corners of the pressure bottom plate, and the other end of the pressure guide rod passes through the pressure guide plate and is connected to the pressure sensor component, and is fixed on the gravity block bottom plate through the pressure linear bearing. Several lithium battery mounting plates are provided above the gravity blocks. Lithium batteries are provided on the lithium battery mounting plates. Several pressure test fixtures are provided on one side of the lithium battery mounting plates. The pressure test fixtures are aligned with the lithium batteries on the lithium battery mounting plates for testing. The pressure sensor component applies pressure to the lithium batteries on the lithium battery mounting plates through an external drive motor.

[0007] Taking the metal shell battery disclosed in the publication number CN119133731A as an example, the shell is formed by stamping. Due to the influence of the metal shell structure and tensile stress, the rigidity strength at the four corner positions is large. And due to the influence of the metal material, stamping environment, and stamping die, there will be differences in the rigidity strength of each metal shell. Taking the technical solution disclosed in the publication number CN119627273A as another example, when forming the metal shell battery, the metal shell battery needs to be placed on the battery mounting plate. The pressure test fixture aligns with the lithium battery on the lithium battery mounting plate for testing, and the pressure sensor component applies pressure to the lithium battery on the lithium battery mounting plate through an external drive motor. However, since there are certain differences in the strength of the metal shells of each battery, when the pressure received by the metal shells is the same, the pressure received by the battery cells inside the battery shells will also be different. Therefore, during the process of battery pressure formation, adjustments cannot be made based on the parameter values feedback by the battery.

[0008] It can be seen from this that the existing metal shell battery formation fixture cannot meet the formation of the current new type of metal shell battery. Therefore, there is an urgent need for a formation fixture that can adjust the battery formation pressure in a timely manner according to the battery parameters during the formation process of the new type of metal shell battery. Summary of the Invention

[0009] The purpose of the present invention is to provide an independent pressurization formation device for metal shell batteries, which can apply pressure to the metal shell batteries separately and can adjust the formation pressure of the batteries according to the parameters of battery formation.

[0010] To achieve the above purpose, an independent pressurization formation device for metal shell batteries provided by an embodiment of the present invention includes a formation body, a pressurization module, and a battery positioning fixture; a formation space is provided inside the formation body, and multiple groups of the pressurization modules are provided inside the formation space;

[0011] The pressurization module includes a mounting plate, a movable pressing plate, a fixed pressing plate, a driving mechanism, a pressure sensing component, and a power connection component; the driving mechanism is provided on the mounting plate, and the driving mechanism has a driving part extending from one side of the mounting plate. The movable pressing plate is arranged on one side of the driving part. The fixed clamping plate is arranged opposite to the movable clamping plate and forms a battery clamping position; the pressure sensing component is arranged on one side of the fixed clamping plate or the movable clamping plate for sensing the pressure applied to the battery by the driving mechanism; the power connection component is arranged on one side of the battery clamping position, and the power connection component is connected to a moving mechanism, and the moving mechanism drives the power connection component to move inward to the battery clamping position to be electrically connected to the battery; the battery positioning fixture is used to hold the battery inside the battery clamping position.

[0012] Further, the driving mechanism includes a pneumatic structure disposed between the mounting plate and the movable pressing plate, and the pneumatic structure includes an airbag or a cylinder; an air intake port is provided on the mounting plate, and the air intake port is in communication with the interior of the airbag.

[0013] Further, guide posts are inserted through both sides of the movable pressing plate, and compression springs are sleeved on the guide posts. The compression springs are used to push the movable pressing plate to reset towards the side of the installation.

[0014] Further, the mounting plate is fixedly installed in the formation space. The mounting plate includes a first side and a second side. The driving part extends out of the first side, and the fixed pressing plates of adjacent pressing modules are installed on the second side.

[0015] Further, a plurality of laminates are arranged in the formation space, and installation positions are formed between two adjacent laminates. The pressing module is detachably installed in the installation position.

[0016] Further, the pressure sensing component includes a pressure sensor disposed on one side of the fixed clamping plate.

[0017] Further, the battery positioning fixture can be removably placed in the battery clamping position. At least two support rods extending to the bottom side of the battery clamping position are provided at the bottom end of the pressing module. The support rods are used to support the battery positioning fixture placed in the battery clamping position; a positioning groove cooperating with at least one of the support rods is further provided on the bottom side of the battery positioning fixture.

[0018] Further, the battery positioning fixture includes a positioning frame body, a lower pressing plate, a lower pressing driving member, a power connection probe, and a rotary contact head; the positioning frame body is provided with a positioning cavity penetrating through the front and back for positioning the battery; guiding and limiting structures are arranged on both sides of the upper end of the positioning cavity, and both ends of the lower pressing plate are slidably connected to the corresponding guiding and limiting structures. The power connection probe is arranged in the lower pressing plate, and the lower end of the power connection probe extends out of the bottom end of the lower pressing plate; the lower pressing driving member is connected to the lower pressing plate and is used to hold the lower pressing plate to connect the power connection probe with the battery in the positioning cavity; the rotary contact head is arranged on one side of the positioning frame body, and the rotary contact head has a contact surface extending out of the positioning frame body, and the contact surface is used to contact the power connection component; the rotary contact head is electrically connected to the power connection probe.

[0019] Further, the battery positioning fixture further includes a backing plate, and connecting rods extend from both sides of the upper end of the backing plate; a support groove is provided at the upper end of one side of the positioning frame body for supporting and limiting the connecting rods, so that the backing plate can swing and cover one side of the positioning cavity.

[0020] Furthermore, a rubber pad is also provided inside the backing plate, and the support groove includes a translation section where the connecting rod can translate.

[0021] Furthermore, the width of the positioning cavity is greater than the width of the battery. Limiting protrusions extending inward are provided at the lower ends of both sides of the positioning cavity. A limiting ejector rod is also provided at the bottom end of the lower pressing plate, and the limiting ejector rod is used to hold the battery within the positioning cavity.

[0022] Furthermore, elastic holding members extending inward are provided on both sides of the positioning cavity.

[0023] One or more of the above technical solutions in the metal shell battery independent pressurized forming device provided by the embodiments of the present invention at least have the following technical effects:

[0024] 1. The monomer battery to be formed can be positioned in the battery positioning fixture, and the battery positioning fixture is positioned in the battery clamping position. During the battery forming process, the driving mechanism pushes the movable pressing plate to press the battery against the fixed pressing plate and applies pressure to the battery. Then, the moving mechanism drives the power connection component to move inward to the inner side of the battery clamping position to be electrically connected to the battery, enabling the battery to be connected to the forming system of the forming device and enabling the battery to complete pressure forming. During the forming process, the pressure received by the battery can be detected through the pressure sensing component, and the pressure of the battery can be adjusted according to the parameters during the battery forming process to meet the requirements of the battery forming parameters. Therefore, while the metal shell battery independent pressurized forming device can meet the simultaneous forming requirements of multiple batteries, it can also achieve independent pressurized forming of each monomer battery, with no interference during the forming process. Therefore, the forming pressure of the battery can be adjusted in real time according to the dynamic conditions of the parameters during the battery forming process.

[0025] 2. Since each pressurization module of the metal shell battery independent pressurized forming device is independent of each other, different batteries can also be placed in each pressurization module to achieve the forming of batteries of different sizes and models. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the metal shell battery independent pressurized forming device provided by the embodiments of the present invention.

[0028] Figure 2Disconnected view of the top view of the pressurization module of the metal shell battery independent pressurization formation device provided by the embodiment of the present invention, fixedly installed inside the fixture body.

[0029] Figure 3 Disconnected view of the top view of the pressurization module of the metal shell battery independent pressurization formation device provided by the embodiment of the present invention, detachably installed inside the fixture body one by one.

[0030] Figure 4 Structural diagram of a single pressurization module of the metal shell battery independent pressurization formation device provided by the embodiment of the present invention.

[0031] Figure 5 Structural diagram of the pressurization modules of the metal shell battery independent pressurization formation device provided by the embodiment of the present invention, connected as a whole.

[0032] Figure 6 Structural diagram of the battery positioning fixture of the metal shell battery independent pressurization formation device provided by the embodiment of the present invention.

[0033] Figure 7 Structural diagram of the other side of the battery fixture of the metal shell battery independent pressurization formation device provided by the embodiment of the present invention. Detailed implementation manners

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of 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 thus should not be construed as limiting the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0037] In the embodiments of the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0038] In an embodiment of the independent pressure formation device for metal shell batteries of the present invention, please refer to Figure 1 , the independent pressure formation device for metal shell batteries in this embodiment is to achieve the pressure formation of a single metal shell battery and independently control the pressure of the battery during the formation process. Specifically: The independent pressure formation device for metal shell batteries in this embodiment includes a formation body 100, a pressure module 200, and a battery positioning fixture 300.

[0039] Among them, referring to Figure 1 , the formation body 100 is a frame structure, which can be a frame structure formed by two end side plates and two side plates on both sides, or a frame structure formed by connecting the two end side plates through a connecting plate or a connecting column. Therefore, a formation space 101 can be formed in the formation body 100, and multiple groups of pressure modules 200 are arranged in the formation space 101, and the pressure modules 200 can independently apply pressure for the formation of single cells.

[0040] Furthermore, referring to Figures 2 to 5 , in an embodiment where the pressure module 200 realizes the independent pressure formation of the battery, it includes a mounting plate 210, a movable pressure plate 220, a fixed pressure plate 230, a driving mechanism 240, a pressure sensing component 250, and a power connection component 260. Among them, the mounting plate 210 is provided with a driving mechanism 240, and the driving mechanism 240 has a driving part 211 extending from one side of the mounting plate 210, and the movable pressure plate 220 is arranged on one side of the driving part 211. In this embodiment, the driving mechanism 240 can be an airbag arranged between the mounting plate 210 and the movable pressure plate 220, and air holes 211 for ventilating the airbag are arranged on the mounting plate 210. Therefore, by inputting pressurized air into the airbag, the leather bag is affected by the pressurized air, pushing the movable pressure plate 220, and the pressure of the movable pressure plate 220 can be adjusted by adjusting the pressure of the pressurized air. In addition, the driving mechanism 240 can also be a cylinder, a hydraulic cylinder, etc. The driving mechanism 240 can also be an electric cam mechanism, and the movable pressure plate 220 is pressed by the high and low surfaces (cam surfaces) of the cam to apply pressure to the battery.

[0041] The fixed clamping plate 230 is arranged opposite to the movable clamping plate 220 and forms a battery clamping position 201, and the battery clamping position 201 is for clamping the battery to be formed.

[0042] The pressure sensing component 250 is disposed on one side of the fixed clamping plate 230 or the movable clamping plate 220 for sensing the pressure applied by the driving mechanism 240 to the battery. For the convenience of the pressure sensing component 250 to be powered on, etc., it is preferably to set the pressure sensing component 250 on the fixed clamping plate 230. For details, please refer to Figures 2 to 5 . And setting the pressure sensing component 250 on the fixed clamping plate 230 can more accurately detect the pressure received by the battery.

[0043] Refer to Figure 1 and Figure 2 , the power connection component 260 is disposed on one side of the battery clamping position 201. The power connection component 260 is connected to the moving mechanism 270, so that the moving mechanism 270 can drive the power connection component 260 to move inward to the battery clamping position 201 to supply power to the battery. In this embodiment, the moving mechanism 270 can be a cylinder or an electric linear module, but is not limited to a cylinder and an electric linear module. Preferably, the power connection components 260 of each pressurizing module 200 can be arranged on the same moving mechanism 270, so that the moving mechanism 270 can drive each power connection component 260 to supply power to the corresponding battery.

[0044] Refer to Figure 4 , the battery positioning fixture 300 is used to hold the battery in the battery clamping position 201. Specifically, the battery positioning fixture 300 can be fixed in the battery clamping position 201 or can be removably placed in the battery clamping position 201.

[0045] In the technical solution of the above embodiment, the monomer battery to be formed can be positioned in the battery positioning fixture 300, and the battery positioning fixture 300 is positioned in the battery clamping position 201. During the battery formation process, the driving mechanism 240 pushes the movable pressing plate 220 to press the battery against the fixed pressing plate 230 and applies pressure to the battery. Then, the moving mechanism 270 drives the power connection component 260 to move inward to the battery clamping position to be electrically connected to the battery, so as to realize that the battery can be connected to the formation system of the formation equipment, and realize the pressure formation of the battery. During the formation process, the pressure received by the battery can be detected by the pressure sensing component 250, and the pressure of the corresponding battery can be dynamically adjusted individually according to the parameters during the battery formation process to meet the battery formation parameter requirements. Therefore, the metal shell battery independent pressurization formation device in this embodiment can meet the requirements of simultaneous formation of multiple batteries, and at the same time realize independent pressurization formation of each monomer battery, and there is no interference during the formation process. Therefore, the formation pressure of the battery can be adjusted in real time according to the dynamic situation of the parameters during the battery formation process. In addition, since each pressurizing module 200 is independent of each other, different batteries can also be placed in each pressurizing module 200 to realize the formation of batteries of different sizes and models.

[0046] Further, installFigures 2 to 5 , to provide guidance and support for the movable platen 220, guide posts 280 are inserted through both sides of the movable platen 220 in this embodiment, so that the movable platen 220 slides along the guide posts 280. Specifically, the guide posts 280 can be installed between the mounting plate 210 and the fixed platen 230. And to facilitate the reset of the movable platen 220, a compression spring 290 is sleeved on the guide posts 280, and the compression spring 290 pushes the movable platen 220 to reset towards the side of the mounting 210. Specifically, when the driving mechanism 240 removes the pressure on the movable platen 220, the movable platen 220 can be pushed to reset by the compression spring 240. Therefore, the driving mechanism 240 does not need to provide a reverse acting force to the movable platen 220, which not only makes the structure simpler, but also plays a certain protective role for the driving mechanism 240 (such as an airbag, an electric cam mechanism), and can extend its service life.

[0047] Further, an embodiment in which the press-forming module 200 is arranged in the forming space 101; specifically, refer to Figure 2 and Figure 5 . The mounting plate 210 is fixedly installed in the forming space 101. The mounting plate 210 includes a first side and a second side 212, and the driving part 241 extends out of the first side 211. More specifically, the driving mechanism 240 is directly arranged on the first side 211. And the fixed platen 230 of the adjacent pressing module 200 is installed on the second side 212. Therefore, the two adjacent pressing modules 200 are connected to each other to form an integral structure, making the pressing modules 200 arranged closely in the forming space 101 and saving space. In addition, for the convenience of installing the guide posts 280, the guide posts 280 are arranged between two adjacent mounting plates 210.

[0048] Further, another embodiment in which the press-forming module 200 is arranged in the forming space 101; specifically, refer to Figure 3 and Figure 4 . A plurality of laminates 102 are arranged in the forming space 101, and an installation position is formed between two adjacent laminates 102, and the pressing module 200 is detachably installed in the installation position. Because the press-forming module 200 can be replaced or repaired separately, the overall forming device will not be affected. More specifically, the mounting plate 210 and the fixed platen 230 in the press-forming module 200 are respectively detachably installed on the corresponding laminates 102. In this embodiment, the guide posts 280 can be directly arranged between the mounting plate 210 and the fixed platen 230.

[0049] Further, the pressure sensing component 250 includes a pressure sensor provided on one side of the fixed clamping plate 230. The pressure sensor senses the battery pressure and feeds it back to the control system of the forming equipment.

[0050] Furthermore, an electric heating component (not shown in the drawings) may be provided inside the fixed clamping plate 230. Therefore, the battery is heated during the formation process to achieve hot pressing formation of the battery. Heating during the battery formation process is a conventional technique in the art and will not be elaborated in this embodiment. However, in this embodiment, to avoid heat loss, a heat insulation pad 251 is provided between the fixed clamping plate 230 and the second side 212 of the mounting plate 210 to avoid heat conduction. For details, please refer to Figures 2 to 5 The pressure sensor is disposed between the heat insulation pad 251 and the fixed clamping plate 230.

[0051] Furthermore, in the embodiment where the battery positioning fixture 300 is removably placed in the battery clamping position 201, refer to Figures 5 to 7 At least two support rods 202 extending to the bottom side of the battery clamping position 201 are provided at the bottom end of the pressing module 200. Further, the support rods 202 are mounted on the bottom side of the mounting plate 210; a positioning groove 301 cooperating with at least one support rod 202 is further provided on the bottom side of the battery positioning fixture 300. In this embodiment, the battery to be formed is positioned in the battery positioning fixture 300, and then the whole is placed into the battery clamping position 201 and supported on the support rods 202, while the positioning groove 301 is positioned on one of the support rods 202. More preferably, the number of the support rods 202 is three and they are arranged in sequence. The battery positioning fixture 300 is supported by the support rods 202 on both sides, and the middle support rod 202 is positioned in the positioning groove 301 but does not support the battery positioning fixture 300, so as to avoid the interference problem of the support rods 202 on the support of the battery positioning fixture 300.

[0052] Furthermore, refer to Figure 6 and Figure 7, the battery positioning fixture 300 includes a positioning frame 310, a lower pressing plate 320, a lower pressing driving member 330, a power connection probe 340, and a rotating contact head 350. Specifically, the positioning frame 310 is provided with a positioning cavity 311 that penetrates through the front and rear. The positioning cavity 311 is used to position the battery, and the edge of the metal shell of the battery extending outward is limited at the edge position formed at the mouth of the positioning cavity 311. Among them, the size of the positioning cavity 311 can be set according to the size of the battery to ensure that the centers of the batteries positioned in the positioning cavity 311 are the same. In addition, the thickness of the positioning frame 310 can also be set according to the thickness of the battery. Specifically, clearance steps can be provided on the front and rear sides of the positioning frame 310, so that the thickness of the part of the positioning frame 310 holding the battery is less than the thickness of the battery. Guide and limit structures 370 are provided on both sides at the upper end of the positioning cavity 311, and both ends of the lower pressing plate 320 are slidably connected to the corresponding guide and limit structures 370. The guide and limit structure 370 can be a structure such as a guide rail in this embodiment. Preferably, the guide and limit mechanism 370 is a guide groove provided on both sides of the positioning frame 310. The guide groove has a bottom. Both ends of the lower pressing plate 320 extend into the guide groove, and the bottom of the guide groove can limit and support the lower pressing plate 320. The power connection probe 340 is provided in the lower pressing plate 320, and the lower end of the power connection probe 340 extends out of the bottom end of the lower pressing plate 320. The lower pressing driving member 330 is connected to the lower pressing plate 320 and is used to hold the lower pressing plate 320 and connect the power connection probe 340 to the battery in the positioning cavity 311. Specifically, when the battery is loaded into the positioning cavity 311, the driving force of the lower pressing driving member 330 can be overcome first to make the lower pressing plate 320 away from the positioning cavity 311, so that the battery can be smoothly loaded into the positioning cavity 311, and then the lower pressing driving member 330 drives the lower pressing plate 320 to press down, so that the power connection probe 340 can detect the pole column of the battery. In this embodiment, the lower pressing driving member 330 can be a compression spring, a solenoid, etc. installed in the guide groove. Further, in order to automatically load the battery into the positioning cavity 311, a plugging position is provided on the lower pressing plate 320, and the opening mechanism on the automated production line can be inserted into the plugging position and overcome the driving force of the lower pressing driving member 330 to move the lower pressing plate 320, so as to avoid the power connection probe 340 interfering with the loaded battery. Therefore, the battery can be grabbed and loaded into the positioning cavity 311 by the manipulator on the automation. The rotating contact head 350 is provided on one side of the positioning frame 310. The rotating contact head 350 has a contact surface extending out of the positioning frame 310, and the contact surface is used to contact the power connection component 260; the rotating contact head 350 is electrically connected to the power connection probe 340.

[0053] Specifically, in this embodiment, when the battery is formed, the battery is first loaded into the positioning cavity 311, and under the action of the downward driving member 330, the battery is kept in the positioning cavity 311, and the power probe 340 is abutted against the pole. The battery positioning fixture 300 is loaded into the battery clamping position 201. The driving mechanism 240 drives the movable pressing plate 220 to position the battery positioning fixture 300 and the battery on the side of the fixed pressing plate 230, so that the fixed pressing plate 230 positions the positioning frame 310, and then the moving mechanism 270 pushes the power connection component 260 to contact and conduct with the rotating contact 350, thereby realizing the electrical connection between the battery and the formation control system, and energizing the battery for formation.

[0054] Further, refer to Figure 6 and Figure 7 The transfer contact 350 can be installed at the upper end of the positioning frame 310. When the transfer contact 350 is installed in the battery clamping position 201, the position of the transfer contact 350 is higher than the battery clamping position 201. Therefore, the moving mechanism 270 can be set on the top side of the body 100, which is convenient for the installation and connection of the power connection component 260. The power connection component 260 and the transfer contact 350 are a conventional electrical switching structure in the art and will not be described in detail in this embodiment.

[0055] Further, refer to Figure 6 The battery positioning fixture 300 also includes a pad 360, and connecting rods 361 extend from both sides of the upper end of the pad 360. A support groove 312 is provided on the upper end of one side of the positioning frame 310, and the support groove 312 is used to support and limit the connecting rod 361, and when the connecting rod 361 is placed in the support groove 312, the pad can swing and cover one side of the positioning cavity 311. Specifically, in this embodiment, after the battery is loaded into the positioning cavity 311, the connecting rod 361 of the pad 360 is loaded into the support groove 312, so that the pad 360 can cover the side of the battery with the limiting edge. When the battery positioning fixture 300 is loaded into the battery clamping position 201, the pressure applied by the movable pressure plate 220 directly acts on the pad 360, and then the pad 360 applies pressure to the battery, so that the battery can be subjected to balanced pressure. Furthermore, a positioning piece can be provided in the support groove 312 to position the connecting rod 361, specifically to limit the axial direction of the connecting rod 361, so as to maintain the width position of the pad 360, thereby ensuring that when the pad 360 is pressed on the battery cover, it can avoid the side plate of the battery metal shell, which is more conducive to the deformation of the battery cover, thereby achieving the effect of applying pressure to the battery cells in the battery shell without being affected by the side plate of the metal shell.

[0056] Further, refer to Figure 7, a rubber pad 362 is also provided on the inner side of the pad 360, the support groove 312 includes a translation section 313, and the connecting rod 361 can translate in the translation section 313. Specifically, in this embodiment, when the movable pressure plate 220 moves to press the battery, the rubber pad 362 can make the force on the battery more uniform and balanced, and the rubber pad 362 can protect the battery. And because the rubber pad 362 can be deformed, the pad 360 will continue to move, and under the action of the translation section 313, the pad 360 is compressed and translated, avoiding the problem of uneven force on the battery caused by the pad 360 swinging around the connecting rod 361 due to pressure.

[0057] Further, refer to Figure 7 The width of the positioning cavity 311 is greater than the width of the battery. The lower ends of both sides of the positioning cavity 311 are provided with inwardly extending limiting protrusions 314. The bottom end of the lower pressing plate 320 is also provided with a limiting top rod 322, which is used to keep the battery in the positioning cavity 311. Specifically, in this embodiment, when the battery is positioned in the positioning cavity 311, the side wall of the battery is limited by the limiting protrusion 314, and the position above the limiting protrusion 314 can avoid the side wall of the battery. Therefore, when the battery is loaded into the positioning cavity 311, it can be loaded from the part above the limiting protrusion 314, and under the action of the gravity of the battery, it is introduced into the space formed by the two limiting protrusions 314, which makes it easy to load the battery into the positioning cavity 311. In addition, after the battery is loaded into the positioning cavity 311, the top plate of the battery is limited by the limiting top rod 322 of the lower pressing plate 320.

[0058] Further, refer to Figure 7 , elastic retainers 315 extending inward are also provided on both sides of the positioning cavity 311. The elastic retainers 315 can further retain the battery in the positioning cavity 311, thereby preventing the battery from falling out of the positioning cavity 311 during the transportation of the battery positioning fixture 300. Furthermore, the elastic retainer 315 may include a compression spring and a limit block, and the compression spring squeezes the limit block into the positioning cavity 311. A jack is also provided on the limit block, so that the limit block can be easily moved to release the battery.

[0059] Furthermore, the front side and the back side of the battery positioning fixture 300 are symmetrically structured, and the left and right sides are also symmetrically structured, and both sides are provided with electrical contacts 350. Therefore, the battery positioning fixture 300 can be used in reverse.

[0060] A metal shell battery formation method comprises the following steps:

[0061] Step 1: Position the battery into the positioning cavity 311 of the positioning frame 310. The lifting rod of the lifting mechanism can be inserted into the insertion position from the back side of the positioning frame 310 and lift the lower pressing plate 320 upward, or directly lift the lower pressing plate 320 by connecting the power unit through the downward pressing driving member 330. Then, the elastic holding member 315 is opened by the clamping opening mechanism, and the manipulator picks up the battery and loads it into the positioning cavity 311. Under the action of its own gravity, the battery slides downward between the two limiting protrusions 314. Then, the downward pressing driving member 330 pushes the lower pressing plate 320 to descend, so that the power connection probe 340 supports on the pole column of the battery and connects the pole column, the limiting ejector rod 322 presses tightly on the top side of the battery, and the elastic holding member 315 holds the side wall of the battery again.

[0062] Step 2: Install the cushion plate 360. The connecting rod 361 at the upper end of the cushion plate 360 is installed into the support groove 312, and the cushion plate 360 covers one side of the battery.

[0063] Step 3: Pressurize and form the battery. The battery positioning fixture 300 with the battery installed is loaded into the battery clamping position 201. The driving mechanism 240 pushes the movable pressing plate 220 to press the battery tightly against the fixed pressing plate 230 and applies pressure to the battery. Then, the moving mechanism 270 drives the power connection assembly 260 to move inward to the battery clamping position to be electrically connected to the battery, and the battery is connected to the forming system of the forming equipment. During the forming process, the pressure received by the battery can be detected through the pressure sensing assembly 250, and the pressure of the corresponding battery can be dynamically adjusted individually according to the parameters during the battery forming process.

[0064] Furthermore, the clamping opening mechanism and the lifting mechanism belong to conventional technologies in the field of automation equipment and will not be elaborated in this embodiment.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An independent pressure forming device for a metal shell battery, characterized in that: It includes a formation body, a pressurizing module, and a battery positioning fixture; a formation space is provided inside the formation body, and multiple groups of the pressurizing modules are provided inside the formation space; The pressurizing module includes a mounting plate, a movable pressing plate, a fixed pressing plate, a driving mechanism, a pressure sensing component, and a power connection component; the driving mechanism is provided on the mounting plate, and the driving mechanism has a driving part extending from one side of the mounting plate. The movable pressing plate is arranged on one side of the driving part. The fixed clamping plate is arranged opposite to the movable clamping plate and forms a battery clamping position; the pressure sensing component is arranged on one side of the fixed clamping plate or the movable clamping plate for sensing the pressure applied to the battery by the driving mechanism; the power connection component is arranged on one side of the battery clamping position, and the power connection component is connected to a moving mechanism, and the moving mechanism drives the power connection component to move inward to the battery clamping position to be electrically connected to the battery; the battery positioning fixture is used to hold the battery in the battery clamping position.

2. The independent pressure formation device for metal shell batteries according to claim 1, wherein: The driving mechanism includes a pneumatic structure arranged between the mounting plate and the movable pressing plate. The pneumatic structure includes an airbag or a cylinder; an air intake port is provided on the mounting plate, and the air intake port is communicated with the inside of the airbag.

3. The independent pressure formation device for metal shell batteries according to claim 2, characterized in that: Guide posts are penetrated through both sides of the movable pressing plate, and compression springs are sleeved on the guide posts. The compression springs are used to push the movable pressing plate to reset to the side of the mounting.

4. The independent pressure formation device for metal shell batteries according to claim 1, characterized in that: The mounting plate is fixedly installed inside the formation space. The mounting plate includes a first side and a second side. The driving part extends out of the first side, and the fixed pressing plates of adjacent pressurizing modules are installed on the second side.

5. The independent pressure forming device for metal shell batteries according to claim 1, characterized in that: Multiple layers of plates are provided inside the formation space, and an installation position is formed between two adjacent layers of plates. The pressurizing module is detachably installed in the installation position.

6. The independent pressure formation device for the metal shell battery according to any one of claims 1 to 5, characterized in that: The pressure sensing component includes a pressure sensor arranged on one side of the fixed clamping plate.

7. The independent pressure formation device for the metal shell battery according to any one of claims 1 to 5, characterized in that: The battery positioning fixture can be taken and placed in the battery clamping position. At least two support rods extending to the bottom side of the battery clamping position are provided at the bottom end of the pressurizing module. The support rods are used to support the battery positioning fixture placed in the battery clamping position; a positioning groove cooperating with at least one of the support rods is further provided on the bottom side of the battery positioning fixture.

8. The independent pressure formation device for metal shell batteries according to claim 7, wherein: The battery positioning fixture includes a positioning frame body, a lower pressing plate, a lower pressing driving part, a power connection probe, and a rotary contact head; the positioning frame body is provided with a positioning cavity penetrating through the front and back for positioning the battery; guiding and limiting structures are provided on both sides of the upper end of the positioning cavity, and both ends of the lower pressing plate are slidably connected to the corresponding guiding and limiting structures. The power connection probe is arranged inside the lower pressing plate, and the lower end of the power connection probe extends out of the bottom end of the lower pressing plate; the lower pressing driving part is connected to the lower pressing plate for holding the lower pressing plate to connect the power connection probe to the battery inside the positioning cavity; the rotary contact head is arranged on one side of the positioning frame body. The rotary contact head has a contact surface extending out of the positioning frame body, and the contact surface is used to contact the power connection component; the rotary contact head is electrically connected to the power connection probe.

9. The independent pressure formation device for metal shell batteries according to claim 8, characterized in that: The battery positioning fixture further includes a backing plate, and connecting rods extend from both sides of the upper end of the backing plate; a support groove is provided at the upper end of one side of the positioning frame body, and the support groove is used for supporting and limiting the connecting rods, so that the backing plate can swing and cover one side of the positioning cavity.

10. The independent pressure formation device for metal shell batteries according to claim 9, characterized in that: A rubber pad is further provided on the inner side of the backing plate, the support groove includes a translation section, and the connecting rod can translate in the translation section.

11. The independent pressure-forming and formation device for the metal shell battery according to claim 7, characterized in that: The width of the positioning cavity is greater than the width of the battery, limiting protrusions extending inward are provided at the lower ends of both sides of the positioning cavity, and a limiting ejector rod is further provided at the bottom end of the lower pressing plate, and the limiting ejector rod is used for holding the battery in the positioning cavity.

12. The independent pressure formation device for metal shell batteries according to claim 7, wherein: Elastic holding members extending inward are further provided on both sides of the positioning cavity.

13. A pressure formation method for a metal shell battery, characterized in that, It includes the metal shell battery independent pressure forming device according to any one of claims 1 to 12; the pressure forming method includes positioning the monomer battery to be formed into the battery positioning fixture, positioning the battery positioning fixture into the battery clamping position, the driving mechanism pushing the movable pressing plate to press the battery against the fixed pressing plate, applying pressure to the battery, the moving mechanism driving the power connection assembly to move inward to the inner side of the battery clamping position to be electrically connected to the battery, so that the battery is connected to the forming system of the forming equipment and the battery is energized for forming; during the process of the battery being energized for forming, the pressure sensing assembly detects the pressure received by the battery, and the forming system dynamically adjusts the pressure corresponding to the battery according to the parameter changes during the battery forming process and the pressure received by the battery.

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