Battery back-end production equipment and production process

Abstract

The present invention provides a battery back-end production equipment and production process, which relate to the field of battery technology. The battery back-end production equipment includes a battery cell integration device, and also includes at least one of a baking device, a primary liquid injection device, a negative pressure formation device, and a capacity separation device; the battery cell integration device includes a shell and at least one separator, the separator is located in the shell, and separates the inner cavity of the shell to form at least two accommodating chambers, and the accommodating chambers are used to accommodate battery cells. During use, at least two battery cells are respectively accommodated in corresponding accommodating chambers to form a battery module assembly, and then the battery module assembly is baked, once injected, negative pressure formed, and capacity separated. During this process, the battery module assembly containing at least two battery cells is placed in and out as a whole. Compared with constantly placing and removing individual battery cells, the operation is simpler and the production efficiency is higher. At the same time, there is no need to equip turnover boxes, which solves the problems of high cost of turnover boxes and large storage space occupation.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery back-end production device and production process. Background Art

[0002] The overall production process of lithium-ion batteries can be divided into three stages: the front-end process, the middle-end process, and the back-end process. The back-end process mainly includes cell baking, primary liquid injection, static standing, negative pressure formation, secondary liquid injection, static standing, capacity separation, self-discharge screening, grouping, and coating. The traditional way for cells to flow between processes is to place the batteries in dedicated turnover boxes and transport them to the process location. They are then removed by a robot and placed in the fixture of the corresponding process equipment for operation. After the process is completed, the batteries are removed by a robot and placed in a turnover box for transportation to the next process.

[0003] Throughout the entire back-end production process, individual battery cells need to be constantly placed in and removed, resulting in low production efficiency. Furthermore, the battery cells require a large number of specialized turnover boxes (suitable for specific battery sizes). If the battery size changes significantly, the dedicated turnover boxes need to be replaced, which is not only costly but also takes up a lot of storage space. Summary of the Invention

[0004] In order to solve the problems in the prior art of low production efficiency of the back-end process of lithium-ion batteries, high cost of equipping turnover boxes, and large storage space occupation, one of the purposes of the present invention is to provide a battery back-end production equipment.

[0005] The present invention provides the following technical solutions:

[0006] A battery back-end production equipment, comprising:

[0007] A battery cell integrated device, comprising a housing and at least one separator, wherein the separator is located within the housing and separates an inner cavity of the housing to form at least two accommodating cavities for accommodating battery cells; and

[0008] At least one of a baking device, a primary liquid injection device, a negative pressure formation device and a volume separation device.

[0009] As a further optional solution for the battery back-end production equipment, the shell includes two first plates and two second plates, wherein one of the second plates is detachably connected to one end of the two first plates, and the other second plate is detachably connected to the other end of the two first plates, and the first plate and the second plate together form the inner cavity.

[0010] As a further optional solution to the battery back-end production equipment, a fixing pin is provided on a side of the second plate facing the first plate, the fixing pin being perpendicular to the first plate, and a clamping portion is provided on an end of the fixing pin away from the second plate, the clamping portion being perpendicular to the second plate;

[0011] The first plate is provided with a pin hole for allowing the fixing pin to pass through;

[0012] The battery cell integration device further includes a first elastic member that can be elastically deformed in a direction parallel to the clamping portion, and the first elastic member is located in the housing.

[0013] As a further optional solution for the battery back-end production equipment, a hole wall of the pin hole at one end away from the second plate body is provided with a groove for the clamping portion to be clamped into.

[0014] As a further optional solution for the battery back-end production equipment, the housing has a first direction, and the accommodating cavities are arranged along the first direction;

[0015] The first plate is parallel to the first direction. A through hole corresponding to the accommodating cavity is provided on the first plate. The through hole is connected to the corresponding accommodating cavity so that the pole of the battery cell is exposed in the through hole.

[0016] As a further optional solution to the battery back-end production equipment, the number of the separators is at least two, and the separators include a first separator plate, a support plate, and a second elastic member that can be elastically deformed along the thickness direction of the first separator plate, and the separators are arranged along the thickness direction of the first separator plate;

[0017] The support plate is arranged along the thickness direction of the first partition plate, one end of the support plate is connected to the first partition plate, and the other end of the support plate is abutted against the first partition plate of the adjacent partition member;

[0018] The first partition plate, the support plate, and the first partition plates of the adjacent partitions together form the accommodating cavity, and the second elastic member is located in the accommodating cavity.

[0019] As a further optional solution for the battery back-end production equipment, the separator includes a second separator plate, and the number of the second separator plates is multiple. The second separator plates are arranged along their own thickness direction, and the accommodating cavity is formed between two adjacent second separator plates.

[0020] As a further optional solution to the battery back-end production equipment, the battery back-end production equipment at least includes the baking device, the baking device includes a box and at least one oven platform arranged in the box, the oven platform includes a support portion, a heating component and a heat conductive layer;

[0021] The support portion is arranged on the bottom surface of the inner wall of the box body, the heating component is embedded in the top surface of the support portion, and the heat conductive layer is laid on the top surface of the support portion and the top surface of the heating component.

[0022] As a further optional solution for the battery back-end production equipment, the width of the support portion is smaller than the width of the battery cell integration device.

[0023] As a further optional solution to the battery back-end production equipment, the battery back-end production equipment at least includes the primary liquid injection device, and the primary liquid injection device includes:

[0024] A base plate having a placement area for placing the battery cell integrated device;

[0025] A plurality of support rods, the support rods being arranged on the bottom plate around the placement area;

[0026] a top plate slidably disposed on the support rod; and

[0027] At least two liquid injection cups are provided on the top plate, and each liquid injection cup has a liquid injection nozzle penetrating the top plate.

[0028] As a further optional solution for the battery back-end production equipment, the liquid filling cup includes a liquid storage portion and a transition portion;

[0029] The transition portion is arranged in a bucket shape and has a large end connected to the liquid storage portion and a small end connected to the liquid injection nozzle.

[0030] As a further optional solution for the battery back-end production equipment, a sealing ring is provided on the liquid injection nozzle, and the sealing ring is used to abut the outer periphery of the liquid injection hole of the battery cell.

[0031] As a further optional solution for the battery back-end production equipment, a limiting member is provided on the side of the top plate facing the bottom plate, and the limiting member abuts against the battery cell integration device during a single injection.

[0032] As a further optional solution to the battery back-end production equipment, two positioning members are provided on a side of the bottom plate facing the top plate, each positioning member having a first positioning surface, a second positioning surface, and a guide surface. The first positioning surface and the second positioning surface are respectively flush with two adjacent boundaries of the placement area, and the guide surface is connected to a side of the second positioning surface away from the first positioning surface.

[0033] The first positioning surfaces of the two positioning members are flush with each other, and the second positioning surfaces of the two positioning members are arranged opposite to each other.

[0034] As a further optional solution for the battery back-end production equipment, the support rod is provided with a slot and a third elastic member, and the third elastic member elastically abuts against a side of the top plate facing the bottom plate;

[0035] A clamping piece is movably connected to the top plate, and the clamping piece is engaged with the clamping slot during one injection.

[0036] As a further optional solution to the battery back-end production equipment, the battery back-end production equipment at least includes the negative pressure formation device, and the negative pressure formation device includes a formation rack, a first temperature control component and at least one first probe component;

[0037] The first temperature control assembly includes a first temperature control driving member and a first heat exchange plate, the first temperature control driving member is disposed on the formation rack, and a driving end of the first temperature control driving member is connected to the first heat exchange plate to drive the first heat exchange plate to contact the battery cell;

[0038] The first probe assembly includes a first probe driver, a first probe seat, and at least two first probes disposed on the first probe seat. The first probe driver is disposed on the formation rack. A driving end of the first probe driver is connected to the first probe seat to drive the first probe to contact the electrode of the battery cell.

[0039] Wherein, at least two negative pressure cups are provided on the first probe seat of one of the first probe assemblies, and the negative pressure cups have suction nozzles.

[0040] As a further optional solution for the battery back-end production equipment, the negative pressure formation device further includes a transmission component, and the transmission component includes a driving roller, a limiting roller and a positioning sensor;

[0041] The active roller is rotatably arranged on the forming frame and supports the battery cell integrated device during negative pressure forming;

[0042] The limiting rollers are rotatably arranged on the forming frame and are distributed in pairs on both sides of the battery cell integrated device during negative pressure forming;

[0043] The positioning sensing component is used to sense the position of the battery cell integrated device.

[0044] As a further optional solution to the battery back-end production equipment, the battery back-end production equipment at least includes the capacity division device, which includes a capacity division rack, a support, a second temperature control component and at least one second probe component;

[0045] The support is provided on the capacity division rack, and the support carries the battery cell integration device during capacity division;

[0046] The second temperature control assembly includes a second temperature control driving member and a second heat exchange plate, the second temperature control driving member is disposed on the sub-capacity rack, and a driving end of the second temperature control driving member is connected to the second heat exchange plate to drive the second heat exchange plate to contact the battery cell;

[0047] The second probe assembly includes a second probe driver, a second probe seat, and at least two second probes arranged on the second probe seat. The second probe driver is arranged on the capacity division rack. The driving end of the second probe driver is connected to the second probe seat to drive the second probe to contact the pole of the battery cell.

[0048] As a further optional solution for the battery back-end production equipment, the support has a positioning portion, which abuts against the side surface of the battery cell integration device during capacity division.

[0049] Another object of the present invention is to provide a production process.

[0050] The present invention provides the following technical solutions:

[0051] A production process, applied to the above-mentioned battery back-end production equipment, the production process comprising:

[0052] Placing the battery cell in the accommodating cavity of the battery cell integration device to form a battery module assembly;

[0053] The battery module assembly is subjected to at least one operation of baking, primary liquid injection, negative pressure formation and capacity separation.

[0054] Another object of the present invention is to provide a production process.

[0055] The present invention provides the following technical solutions:

[0056] A production process, applied to the above-mentioned battery back-end production equipment, the production process comprising:

[0057] Placing the battery cell in the accommodating cavity of the battery cell integration device to form a battery module assembly;

[0058] performing a baking operation on the battery module assembly;

[0059] Performing a liquid injection operation on the battery module assembly;

[0060] performing a negative pressure forming operation on the battery module assembly;

[0061] Disassembling the battery module assembly, weighing and re-injecting liquid into each battery cell;

[0062] The battery cell is again placed in the accommodating cavity of the battery cell integration device to form the battery module assembly;

[0063] Performing capacity division on the battery module assembly;

[0064] Disassembling the battery module assembly and screening qualified battery cells;

[0065] Wherein, when performing a liquid injection operation and a negative pressure formation operation on the battery module assembly, the battery module assembly is turned over so that the liquid injection hole of the battery cell faces upward.

[0066] The embodiments of the present invention have the following beneficial effects:

[0067] In the above-mentioned battery back-end production equipment, the inner cavity of the shell of the battery cell integration device is divided by at least one partition to form at least two accommodating cavities for accommodating battery cells. During use, at least two battery cells are respectively accommodated in the corresponding accommodating cavities to form a battery module assembly, and then the battery module assembly is baked by a baking device, and / or the battery module assembly is injected once by a single injection device, and / or the battery module assembly is negatively pressured by a negative pressure formation device, and / or the battery module assembly is subjected to a capacity separation operation by a capacity separation device. In this process, the battery module assembly containing at least two battery cells is put in and out as a whole. Compared with constantly putting in and out individual battery cells, the operation is simpler and the production efficiency is higher. At the same time, there is no need to equip turnover boxes, which solves the problem of high cost of turnover boxes and large storage space occupation.

[0068] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0070] Figure 1 A schematic structural diagram of a battery cell is shown;

[0071] Figure 2 A schematic structural diagram of a cell integration device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0072] Figure 3 shows a schematic structural diagram of a battery module assembly;

[0073] Figure 4 A schematic structural diagram of a housing in a battery back-end production device provided by an embodiment of the present invention is shown;

[0074] Figure 5 Shown Figure 4 A in the middle is an enlarged schematic diagram;

[0075] Figure 6 A schematic structural diagram of a separator in a battery back-end production device provided by an embodiment of the present invention is shown;

[0076] Figure 7 A schematic structural diagram of a separator in a battery back-end production device according to another embodiment of the present invention is shown;

[0077] Figure 8 A schematic structural diagram of a baking device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0078] Figure 9 A schematic structural diagram of an oven platform in a battery back-end production device provided by an embodiment of the present invention is shown;

[0079] Figure 10 A schematic structural diagram of a primary liquid injection device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0080] Figure 11 A schematic diagram showing the assembly relationship between a primary liquid injection device and a battery cell integration device in a battery back-end production device provided by an embodiment of the present invention;

[0081] Figure 12 A schematic structural diagram of a liquid filling cup in a battery back-end production device provided by an embodiment of the present invention is shown;

[0082] Figure 13 A schematic structural diagram of a bottom plate in a battery back-end production device provided by an embodiment of the present invention is shown;

[0083] Figure 14 A schematic diagram showing the connection relationship between the support rod and the top plate in a battery back-end production device provided by an embodiment of the present invention is shown;

[0084] Figure 15 A front view of a primary liquid injection device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0085] Figure 16 A schematic structural diagram of a negative pressure formation device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0086] Figure 17 A schematic diagram showing the assembly relationship between a negative pressure formation device and a cell integration device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0087] Figure 18 A schematic structural diagram of a capacity separation device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0088] Figure 19 A schematic diagram showing the assembly relationship between a capacity separation device and a cell integration device in a battery back-end production device provided by an embodiment of the present invention is shown;

[0089] Figure 20 A schematic diagram showing the steps of a production process provided by an embodiment of the present invention is shown;

[0090] Figure 21 A schematic diagram of the steps of a production process provided by another embodiment of the present invention is shown.

[0091] Description of main component symbols:

[0092] 10-battery cell; 11-electrode column; 12-liquid injection hole; 20-battery module assembly;

[0093] 100 - battery cell integrated device; 110 - housing; 111 - first plate; 111a - pin hole; 111b - groove; 111c - through hole; 111d - display hole; 112 - second plate; 112a - hanging hole; 113 - fixing pin; 113a - holding portion; 120 - separator; 121 - first separator; 122 - support plate; 123 - second elastic member; 124 - second separator; 130 - accommodating cavity; 140 - first elastic member;

[0094] 200 - baking device; 210 - box; 220 - oven platform; 221 - support part; 222 - heating component; 223 - heat conducting layer;

[0095] 300 - primary liquid injection device; 310 - bottom plate; 311 - placement area; 312 - positioning member; 312a - first positioning surface; 312b - second positioning surface; 312c - guide surface; 320 - support rod; 321 - slot; 322 - third elastic member; 330 - top plate; 331 - liquid injection cup fixing seat; 332 - connecting member; 333 - limiting member; 340 - liquid injection cup; 341 - liquid injection nozzle; 342 - liquid storage portion; 343 - transition portion; 344 - sealing ring;

[0096] 400 - negative pressure formation device; 410 - formation rack; 411 - base; 420 - first temperature control assembly; 421 - first temperature control driver; 422 - first heat exchange plate; 423 - first mounting base; 424 - first guide column; 430 - first probe assembly; 431 - first probe driver; 432 - first probe base; 433 - first probe; 434 - negative pressure cup; 434a - nozzle; 435 - second mounting base; 440 - transmission assembly; 441 - driving roller; 442 - limiting roller; 443 - positioning sensor;

[0097] 500-capacity division device; 510-capacity division rack; 520-support; 521-positioning part; 530-second temperature control component; 531-second temperature control drive; 532-second heat exchange plate; 533-third mounting seat; 534-second guide column; 540-second probe assembly; 541-second probe drive; 542-second probe seat; 543-second probe; 544-fourth mounting seat. DETAILED DESCRIPTION

[0098] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0099] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0100] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0101] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0102] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0103] Lithium-ion batteries can be categorized by form and packaging into cylindrical, prismatic, and pouch cells. In the prior art, most prismatic batteries have their terminals located on the same side of the cover. As battery capacity continues to increase, some prismatic batteries are beginning to adopt a structure with terminals located at both ends, facilitating innovative integration with existing packaging methods.

[0104] The overall production process of lithium-ion batteries can be divided into three stages, namely the front-end process (electrode sheet manufacturing), the middle-end process (stacking and assembly), and the back-end process. Among them, the back-end process mainly includes battery cell baking, primary liquid injection, static, negative pressure formation, secondary liquid injection, static, capacity separation, self-discharge screening, grouping, and coating. The traditional way for batteries to flow between processes is to place the battery in a dedicated turnover box and transport it to the process location. The battery is then taken out by a robot and placed in the fixture in the corresponding process equipment for operation. After the process is completed, the battery is taken out by a robot and placed in a turnover box for transportation to the next process.

[0105] Throughout the entire back-end production process, individual cells need to be constantly placed in and out, resulting in low production efficiency and a high risk of improper placement of cells, leading to poor lithium-ion battery performance or compromising test accuracy. Furthermore, for large-capacity cells with terminals at both ends, the back-end production process requires constant flipping of individual cells, a complex process that also reduces production efficiency.

[0106] Furthermore, battery cells require a large number of specialized turnover boxes (suitable for batteries of specific specifications and sizes). If the battery specifications and sizes change significantly, the dedicated turnover boxes need to be replaced, which is not only costly but also takes up a lot of storage space.

[0107] Example

[0108] This embodiment provides a battery back-end production equipment, which is suitable for the back-end process of lithium-ion batteries, especially the back-end process of square batteries.

[0109] See also Figure 1 Taking a prismatic battery as an example, its cell 10 is a rectangular parallelepiped, and is provided with a terminal 11, a liquid injection port 12, and a QR code. The terminal 11 can be provided at one end of the cell 10 along its length, or it can be provided in pairs at both ends of the cell 10 along its length. The liquid injection port 12 and the QR code are provided at one end of the cell 10 along its length.

[0110] Please also refer to Figures 2 to 19 The above-mentioned battery back-end production equipment includes a battery cell integration device 100, and also includes at least one of a baking device 200, a primary liquid injection device 300, a negative pressure formation device 400 and a capacity separation device 500.

[0111] The battery cell integrated device 100 includes a housing 110 and at least one separator 120 . The separator 120 is located inside the housing 110 and divides the inner cavity of the housing 110 into at least two accommodating cavities 130 for accommodating the battery cells 10 .

[0112] When using the above-mentioned battery back-end production equipment, at least two battery cells 10 are respectively placed in corresponding accommodating cavities 130 to form a battery module assembly 20, and then the battery module assembly 20 is baked by the baking device 200, and / or the battery module assembly 20 is injected once by the primary injection device 300, and / or the battery module assembly 20 is negatively pressurized by the negative pressure formation device 400, and / or the battery module assembly 20 is divided into different capacities by the capacity division device 500.

[0113] During this process, the battery module assembly 20, containing at least two battery cells 10, is inserted and removed as a whole. Compared to the constant insertion and removal of individual battery cells 10, the use of the aforementioned battery back-end production equipment simplifies operation and improves production efficiency. Furthermore, the need for turnover boxes is eliminated, solving the problems of high costs and the large amount of storage space occupied by turnover boxes.

[0114] Please also refer to Figure 2 、 Figure 3 and Figure 4 In some embodiments, the housing 110 is composed of two first plates 111 and two second plates 112. One of the second plates 112 is detachably connected to one end of each of the two first plates 111, and the other second plates 112 are detachably connected to the other end of each of the two first plates 111. The two first plates 111 and the two second plates 112 together form an inner cavity.

[0115] When in use, the battery cells 10 and the separators 120 can be stacked first, and then the first plate 111 and the second plate 112 can be assembled. Conversely, after the first plate 111 and the second plate 112 are disassembled, the battery cells 10 can be taken out quickly and easily.

[0116] Please combine Figure 5 Specifically, the second plate 112 is located between the two first plates 111, and a fixing pin 113 is provided on the side of the second plate 112 facing the first plate 111. The fixing pin 113 is perpendicular to the first plate 111, and a retaining portion 113a is provided on the end of the fixing pin 113 away from the second plate 112. The retaining portion 113a is perpendicular to the second plate 112.

[0117] Correspondingly, a pin hole 111 a is provided on the first plate 111 for allowing the fixing pin 113 to pass through.

[0118] In addition, the battery cell integrated device 100 further includes a first elastic member 140 that can be elastically deformed in a direction parallel to the holding portion 113 a . The first elastic member 140 is located inside the housing 110 .

[0119] During assembly, the two second plates 112 are first brought together in a direction parallel to the retaining portion 113a until the fixing pin 113 is aligned with the pin hole 111a. During this process, the first elastic member 140 is squeezed and deformed. Subsequently, the two first plates 111 are brought together in a direction parallel to the fixing pin 113, so that the fixing pin 113 and the retaining portion 113a thereon are inserted into the pin hole 111a until the first plate 111 and the second plate 112 abut against each other. Finally, the two second plates 112 are released. Under the elastic force of the first elastic member 140, the two second plates 112 move away from each other, driving the retaining portion 113a on the fixing pin 113 to move, causing the retaining portion 113a to be misaligned with the pin hole 111a and pressing against the first plate 111 from the outside inward, thereby securing the first and second plates 111, 112 to each other, thereby achieving a detachable connection.

[0120] During disassembly, the two second plates 112 are brought closer together until the fixing pin 113 and the retaining portion 113 a on the fixing pin 113 are aligned with the pin hole 111 a again, and the first plate 111 and the second plate 112 can be separated.

[0121] Optionally, the first elastic member 140 is a compressible foam plate. In addition, a cam-shaped nail cap is provided at one end of the fixing pin 113 away from the second plate body 112, and the cam side of the nail cap protrudes in a direction perpendicular to the second plate body 112, thereby forming a clamping portion 113a.

[0122] It can be understood that the compressible amount of the compressible foam sheet is not less than twice the length of the holding portion 113a.

[0123] Furthermore, a groove 111 b into which the clamping portion 113 a can be clamped is provided on a hole wall at one end of the pin hole 111 a away from the second plate body 112 .

[0124] When the fixing pin 113 and the retaining portion 113a on the fixing pin 113 are inserted into the pin hole 111a until the first plate 111 and the second plate 112 abut against each other, the end of the fixing pin 113 away from the second plate 112 is aligned with the groove 111b. After the two second plates 112 are loosened, the retaining portion 113a is offset from the pin hole 111a and snaps into the groove 111b, thereby pressing against the first plate 111 from the outside inward. After assembly is complete, the fixing pin 113 and the retaining portion 113a on the fixing pin 113 will not protrude from the side of the first plate 111 facing away from the second plate 112, keeping the outer surface of the entire housing 110 flat and easy to clamp, transfer, and place.

[0125] In this embodiment, the housing 110 has a first direction, which is indicated by the X direction in the figure. The accommodating cavities 130 are arranged along the first direction, and the battery cells 10, the separators 120 and the first elastic members 140 are stacked along the first direction.

[0126] The first direction may be a thickness direction of the battery cell 10 or a width direction of the battery cell 10 .

[0127] Furthermore, the first plate 111 is parallel to the first direction and located at both ends of the battery cell 10 along its length, while the second plate 112 is perpendicular to the first direction. The first plate 111 is provided with a through hole 111c corresponding to the accommodating cavity 130. The through hole 111c is slightly larger than the terminal 11 of the battery cell 10. Furthermore, the through hole 111c communicates with the corresponding accommodating cavity 130, so that the terminal 11 of the battery cell 10 is exposed through the through hole 111c.

[0128] During negative pressure formation and capacity separation of the battery cells 10, the probe contacts and conducts with the poles 11 exposed in the through-holes 111c. At this point, the first plate 111 cooperates with the second plate 112 to secure the battery cells 10 and protect the ends of the battery cells 10 from contamination along their length.

[0129] Similarly, a display hole 111d corresponding to the accommodating cavity 130 is further provided on the first plate 111. The display hole 111d is connected to the corresponding accommodating cavity 130 so that the two-dimensional code of the battery cell 10 is displayed on the display hole 111d.

[0130] Furthermore, the thickness of the first plate 111 is not less than the height of the pole 11 protruding from the surface of the battery cell 10, preventing the pole 11 from passing through the through hole 111c, so that the outer surface of the entire shell 110 remains flat, which is convenient for clamping, transferring and placing.

[0131] Furthermore, a certain distance is left between the side of the first plate 111 close to the liquid injection hole 12 and the side of the battery cell 10 , so as to facilitate a liquid injection operation on the battery cell 10 .

[0132] Furthermore, a rectangular hoisting hole 112 a is provided at the geometric center of the large surface of the second plate 112 . The hoisting hole 112 a is used to cooperate with a mechanical gripper to rotate and transport the assembled battery module assembly 20 .

[0133] In other embodiments of the present application, the second plate 112 may be parallel to the first direction, and the first plate 111 may be perpendicular to the first direction. In this case, the battery cells 10 and the separators 120 are still stacked along the first direction.

[0134] In other embodiments, the shell 110 may also be an integrally formed semi-enclosed outer frame with at least one side open to accommodate the battery cell 10 and the separator 120 , and the pole 11 of the battery cell 10 is directly exposed on the open side of the shell 110 .

[0135] See also Figure 6In some embodiments, there are at least two separators 120. The separator 120 includes a first separator plate 121, a support plate 122, and a second elastic member 123 that can be elastically deformed along the thickness direction of the first separator plate 121. The separators 120 are arranged along the thickness direction of the first separator plate 121, and the thickness direction of the first separator plate 121 is parallel to the first direction.

[0136] Accordingly, the support plate 122 is disposed along the thickness direction of the first partition plate 121 . One end of the support plate 122 is connected to the first partition plate 121 , and the other end of the support plate 122 abuts against the first partition plate 121 of the adjacent partition 120 .

[0137] The first partition plate 121 , the support plate 122 and the first partition plate 121 of the adjacent partition member 120 together form an accommodating cavity 130 , and the second elastic member 123 is located in the accommodating cavity 130 .

[0138] At this time, the number of separators 120 , the number of accommodating cavities 130 , and the number of battery cells 10 that can be integrated into the battery cell integration device 100 are equal, and the separators 120 , the accommodating cavities 130 , and the battery cells 10 correspond one to one.

[0139] During assembly, the battery cells 10 are first placed into the corresponding accommodating cavities 130 and the second elastic members 123 are squeezed until the end of the battery cell 10 away from the first partition plate 121 is flush with the end of the support plate 122 away from the first partition plate 121. The separators 120 are then stacked along the thickness of the first partition plate 121, and the first and second plates 111, 112 are assembled.

[0140] Optionally, the second elastic member 123 is a layered compressible foam, and its shape is the same as that of the first partition plate 121 .

[0141] Exemplarily, the first direction is the thickness direction of the battery cell 10. It is understood that the length of the support plate 122 along the first direction is greater than the thickness of the battery cell 10, and less than the sum of the thickness of the battery cell 10 and the thickness of the second elastic member 123. Furthermore, the compressibility of the second elastic member 123 is not less than the difference between the length of the support plate 122 along the first direction and the thickness of the battery cell 10.

[0142] With the above design, the spacing between the battery cells 10 is determined by the separator 120, and the thickness tolerance of the battery cell 10 is controlled by the compression amount of the second elastic member 123, thereby eliminating the error caused by the thickness tolerance of the battery cell 10 and improving the accuracy of the spacing between the battery cells 10, which is conducive to precise control of the position of the pole 11 and the injection hole 12.

[0143] In addition, for cells 10 of different sizes and thicknesses, separators 120 of different sizes can be provided and replaced as needed. Compared with replacing turnover boxes, replacing separators 120 is less expensive and spare separators 120 take up less storage space.

[0144] See also Figure 7 In other embodiments, the separator 120 includes a second separator 124. There are multiple second separators 124, each arranged along its own thickness direction, with the thickness direction of each second separator 124 parallel to the first direction. In this case, a receiving cavity 130 is formed between any two adjacent second separators 124, and the number of second separators 124 is one more than the number of battery cells 10.

[0145] During assembly, the second plate 112, the second partition plate 124, the battery cell 10, the second partition plate 124, the battery cell 10, ..., the second partition plate 124, the first elastic member 140 and the second plate 112 are stacked in sequence, and then pressure is applied to the two second plates 112 before installing the first plate 111.

[0146] Similarly, the thickness of the second separator 124 is determined by the thickness of the battery cell 10 to ensure that the distance between battery cells 10 of different capacities remains consistent after assembly. When the specifications and dimensions of the battery cell 10 change, the thickness of the second separator 124 can be adjusted, which can save costs and replacement time.

[0147] Please also refer to Figure 8 and Figure 9 In some embodiments, the battery back-end production equipment includes at least a baking device 200 .

[0148] Specifically, the baking device 200 includes a box body 210 and at least one oven platform 220 disposed in the box body 210 . The oven platform 220 is composed of a support portion 221 , a heating component 222 and a heat-conducting layer 223 .

[0149] The support portion 221 is disposed on the bottom surface of the inner wall of the housing 210. The heating assembly 222 is embedded in the top surface of the support portion 221, and the top surface of the heating assembly 222 is flush with the top surface of the support portion 221. The heat conductive layer 223 is laid on the top surface of the support portion 221 and the top surface of the heating assembly 222.

[0150] When in use, the battery module assembly 20 is transferred into the box 210 and placed on the heat-conducting layer 223. The heat generated by the heating component 222 is transferred to the battery module assembly 20 through the heat-conducting layer 223 for baking.

[0151] Optionally, the box body 210 is a vacuum oven, and the heat conductive layer 223 uses an elastic heat conductive pad.

[0152] In this embodiment, there are four oven platforms 220 in the box body 210 , which can bake four battery module assemblies 20 at the same time.

[0153] Furthermore, the width of the support portion 221 is smaller than the width of the battery cell integrated device 100 .

[0154] When the battery module assembly 20 is placed on the heat conductive layer 223 , both sides of the battery cell integrated device 100 overhang out of the support portion 221 , so that a forklift can pick up the battery module assembly 20 .

[0155] It can be understood that the distance between two adjacent steel forks of the forklift is greater than the width of the support portion 221, and the height of the support portion 221 is greater than the thickness of the steel fork, ensuring that the steel fork of the forklift can be smoothly withdrawn.

[0156] Please also refer to Figure 10 and Figure 11 In some embodiments, the battery back-end production equipment includes at least one liquid injection device 300 , which includes a bottom plate 310 , a support rod 320 , a top plate 330 and a liquid injection cup 340 .

[0157] The bottom plate 310 is arranged horizontally, and the upper surface of the bottom plate 310 has a placement area 311 for placing the battery cell integrated device 100 .

[0158] The support rods 320 are vertically arranged and are in a plurality. The plurality of support rods 320 are arranged on the bottom plate 310 around the placement area 311 , and the bottom ends of the support rods 320 are fixedly connected to the bottom plate 310 .

[0159] The top plate 330 is parallel to the bottom plate 310 and is located above the bottom plate 310 . The top plate 330 is slidably disposed on the top of the support rod 320 .

[0160] At least two liquid filling cups 340 are provided, which are the same in number as the number of battery cells 10 and correspond one to one. Each liquid filling cup 340 is provided on the top plate 330 and has a liquid filling nozzle 341 penetrating the top plate 330 .

[0161] When in use, first lift the top plate 330 upwards, then place the battery cell integrated device 100 in the placement area 311, and then move the top plate 330 downward until the injection nozzle 341 of the injection cup 340 is docked with the injection hole 12 of the corresponding battery cell 10, and then the battery cell 10 can be injected once.

[0162] Specifically, a liquid filling cup fixing seat 331 is provided on the upper surface of the top plate 330 , and each liquid filling cup 340 is fixed on the liquid filling cup fixing seat 331 .

[0163] See also Figure 12Specifically, the liquid injection cup 340 includes a liquid storage portion 342 and a transition portion 343 .

[0164] The liquid storage portion 342 is located at the upper portion of the liquid injection cup 340 , and its cross section is a rounded rectangular shape.

[0165] The transition portion 343 is located at the lower section of the liquid injection cup 340 . The transition portion 343 is arranged in a bucket shape. The transition portion 343 has a large end connected to the liquid storage portion 342 and a small end connected to the liquid injection nozzle 341 .

[0166] In addition, the transition portion 343 is connected to one side of the bottom end of the liquid storage portion 342 , and the other side of the bottom end of the liquid storage portion 342 is tilted, which is beneficial for the electrolyte in the liquid filling cup 340 to be injected into the battery cell 10 .

[0167] Furthermore, a sealing ring 344 is provided on the liquid injection nozzle 341, and the sealing ring 344 can be made of rubber.

[0168] During the first injection, the sealing ring 344 abuts against the outer periphery of the injection hole 12 of the battery cell 10 to prevent the electrolyte from leaking therefrom.

[0169] See also Figure 13 Furthermore, two positioning members 312 are provided on one side of the bottom plate 310 facing the top plate 330 for positioning the battery cell integrated device 100 .

[0170] Each of the two positioning members 312 has a first positioning surface 312a, a second positioning surface 312b and a guide surface 312c. The first positioning surface 312a and the second positioning surface 312b are respectively flush with two adjacent boundaries of the placement area 311, and the guide surface 312c is connected to the side of the second positioning surface 312b away from the first positioning surface 312a.

[0171] In addition, the first positioning surfaces 312 a of the two positioning members 312 are flush with each other, and the second positioning surfaces 312 b of the two positioning members 312 are arranged opposite to each other.

[0172] During use, the battery cell assembly 100 is placed between the two positioning members 312 in a direction parallel to the second positioning surface 312b until the battery cell assembly 100 abuts the first positioning surface 312a, completing the positioning of the battery cell assembly 100 and preventing lithium battery failure caused by improper placement of the battery cells 10. During this process, the guide surface 312c can guide the battery cell assembly 100 into position smoothly.

[0173] See also Figure 14 Furthermore, a slot 321 is provided on the support rod 320 , and a third elastic member 322 is provided. The third elastic member 322 elastically abuts against a side of the top plate 330 facing the bottom plate 310 .

[0174] During use, the third elastic member 322 can push the top plate 330 upwards, eliminating the need for an operator to manually lift the top plate 330 .

[0175] At the same time, a clamping member 332 is movably connected to the top plate 330 , and the clamping member 332 is engaged with the clamping slot 321 during a first injection.

[0176] During use, the operator overcomes the elastic force of the third elastic member 322 to move the top plate 330 downward until the liquid injection nozzle 341 of the liquid injection cup 340 is docked with the liquid injection hole 12 of the corresponding battery cell 10, and then moves the clamping member 332 to make the clamping member 332 snap into the slot 321, so that the top plate 330 can be fixed for a liquid injection operation.

[0177] Optionally, an annular protrusion is provided on the support rod 320. The third elastic member 322 is a spring, which is sleeved on the support rod 320, with the bottom end of the spring abutting against the protrusion and the top end of the spring abutting against the lower surface of the top plate 330.

[0178] Optionally, the clamping member 332 is rotatably arranged on the upper surface of the top plate 330 via a pin. The operator rotates the clamping member 332 around the pin to engage the clamping member 332 into the clamping slot 321 or disengage the clamping member 332 from the clamping slot 321 .

[0179] See also Figure 15 Furthermore, a limiting member 333 is provided on one side of the top plate 330 facing the bottom plate 310 , and the limiting member 333 supports the battery cell integrated device 100 during a liquid injection.

[0180] When the operator overcomes the elastic force of the third elastic member 322 and moves the top plate 330 downward, the limit member 333 moves downward accordingly until the limit member 333 abuts the battery cell integrated device 100. At this time, the top plate 330 cannot move further downward, preventing the liquid injection nozzle 341 from over-pressing the battery cell 10.

[0181] Please also refer to Figure 16 and Figure 17 In some embodiments, the battery back-end production equipment includes at least a negative pressure formation device 400 , and the negative pressure formation device 400 includes a formation rack 410 , a first temperature control component 420 and at least one first probe component 430 .

[0182] The formation rack 410 is provided with a base 411 for directly or indirectly supporting the battery cell integrated device 100. The first temperature control assembly 420 and the first probe assembly 430 are both provided on the formation rack 410 to perform negative pressure formation on the battery cells 10 accommodated in the battery cell integrated device 100.

[0183] The first temperature control components 420 are arranged in pairs and include a first temperature control driver 421 and a first heat exchange plate 422. The first temperature control driver 421 is arranged on the formation rack 410, and the driving end of the first temperature control driver 421 is connected to the first heat exchange plate 422 to drive the first heat exchange plate 422 to contact the battery cell 10.

[0184] The first probe assembly 430 includes a first probe driver 431, a first probe holder 432, and at least two first probes 433 disposed on the first probe holder 432. The first probe driver 431 is disposed on the formation rack 410, and a driving end of the first probe driver 431 is connected to the first probe holder 432 to drive the first probes 433 to contact the electrode 11 of the battery cell 10.

[0185] At least two negative pressure cups 434 are provided on the first probe seat 432 of a first probe assembly 430 , and the negative pressure cup 434 has a suction nozzle 434 a .

[0186] When in use, the first temperature control drive component 421 drives the first heat exchange plate 422 to move toward the battery cell integration device 100. The first heat exchange plates 422 of the two first temperature control components 420 clamp the battery cell integration device 100 from both sides and contact the battery cells 10 accommodated in the battery cell integration device 100 to heat or cool the battery cells 10, ensuring the stability of the temperature of the battery cells 10 during the negative pressure formation process.

[0187] At the same time, the first probe driver 431 drives the first probe holder 432 toward the battery cell assembly 100, causing the first probe 433 mounted on the first probe holder 432 to move accordingly until it contacts and establishes contact with the terminal 11 of the battery cell 10. Furthermore, the suction nozzle 434a of the negative pressure cup 434 docks with the liquid injection hole 12 of the battery cell 10, enabling the negative pressure forming operation.

[0188] Optionally, the first temperature control driving member 421 is a cylinder. The first temperature control assembly 420 further includes a first mounting seat 423 , which is fixedly mounted on the formation rack 410 , and the first temperature control driving member 421 is fixedly mounted on the first mounting seat 423 .

[0189] In addition, four first guide posts 424 are provided on the side of the first heat exchange plate 422 facing away from the battery cell integration device 100. The first guide posts 424 are perpendicular to the first heat exchange plate 422 and slide through the first mounting base 423. When the first temperature control driver 421 drives the first heat exchange plate 422 to move, the first guide posts 424 guide the first heat exchange plate 422, ensuring smooth movement.

[0190] Optionally, the first probe driving member 431 is a cylinder, and the first probe driving members 431 are arranged in pairs, and the first probe base 432 is synchronously driven by the two first probe driving members 431. The first probe assembly 430 also includes a second mounting base 435, which is fixedly disposed on the formation frame 410, and the first probe driving member 431 is fixedly disposed on the second mounting base 435.

[0191] In this embodiment, the battery cell 10 is provided with a terminal post 11 at both ends along its length, and the end of the battery cell 10 provided with the liquid injection port 12 faces upward. Accordingly, two first probe assemblies 430 are provided. One probe assembly is located above the battery cell assembly 100 and is provided with a negative pressure cup 434, while the other probe assembly is located below the battery cell assembly 100.

[0192] Furthermore, the negative pressure formation device 400 further includes a transmission assembly 440, and the transmission assembly 440 includes a driving roller 441, a limiting roller 442, and a positioning sensor 443. A plurality of driving rollers 441 and limiting rollers 442 are provided and arranged in a horizontal direction.

[0193] The rotation axis of the active roller 441 is horizontal. The active roller 441 is rotatably disposed on the side of the base 411 and supports the battery cell integrated device 100 when negative pressure is generated.

[0194] The rotation axis of the limiting roller 442 is vertical. The limiting rollers 442 are rotatably disposed on the upper surface of the base 411 and are distributed in pairs on both sides of the battery cell integrated device 100 when negative pressure is generated.

[0195] The positioning sensing element 443 is used to sense the position of the battery cell integrated device 100 .

[0196] During use, the battery cell integrated device 100 is placed on the active roller 441. The active roller 441 is driven by the motor and the sprocket chain assembly (not shown in the figure) to rotate, and the battery cell integrated device 100 is transported forward in the horizontal direction until the battery cell integrated device 100 collides with the positioning sensor 443. The positioning sensor 443 sends an electrical signal to the motor, the motor stops running, and the battery cell integrated device 100 is transported to its place, avoiding lithium battery defects caused by the battery cell 10 not being placed in place. During transportation, the limiting roller 442 limits the battery cell integrated device 100 to prevent the battery cell integrated device 100 from shifting.

[0197] Please also refer to Figure 18 and Figure 19 In some embodiments, the battery back-end production equipment includes at least a capacity division device 500 , and the capacity division device 500 is composed of a capacity division rack 510 , a support 520 , a second temperature control component 530 and at least one second probe component 540 .

[0198] The support 520, the second temperature control assembly 530, and the second probe assembly 540 are all disposed on the capacity division rack 510. The support 520 supports the cell integration device 100 during capacity division, and the second temperature control assembly 530 and the second probe assembly 540 perform capacity division operations on the cell 10 accommodated in the cell integration device 100.

[0199] The second temperature control assembly 530 is provided in pairs and includes a second temperature control driver 531 and a second heat exchange plate 532. The second temperature control driver 531 is provided in the sub-capacity rack 510, and the driving end of the second temperature control driver 531 is connected to the second heat exchange plate 532 to drive the second heat exchange plate 532 into contact with the battery cell 10.

[0200] The second probe assembly 540 includes a second probe driver 541, a second probe base 542, and at least two second probes 543 disposed on the second probe base 542. The second probe driver 541 is disposed on the sub-capacity frame 510, and a driving end of the second probe driver 541 is connected to the second probe base 542 to drive the second probes 543 to contact the poles 11 of the battery cells 10.

[0201] When in use, the second temperature control drive 531 drives the second heat exchange plate 532 to move toward the battery cell integration device 100. The second heat exchange plates 532 of the two second temperature control components 530 clamp the battery cell integration device 100 from both sides and contact the battery cells 10 accommodated in the battery cell integration device 100 to heat or cool the battery cells 10, ensuring the temperature stability of the battery cells 10 during the capacity distribution process.

[0202] At the same time, the second probe driver 541 drives the second probe holder 542 to move toward the battery cell integrated device 100 , and the second probe 543 disposed on the second probe holder 542 moves accordingly until it contacts and conducts with the electrode 11 of the battery cell 10 .

[0203] Optionally, the second temperature control driving member 531 is a cylinder. The second temperature control assembly 530 further includes a third mounting base 533 , which is fixedly mounted on the capacity-dividing rack 510 , and the second temperature control driving member 531 is fixedly mounted on the third mounting base 533 .

[0204] In addition, four second guide posts 534 are provided on the side of the second heat exchange plate 532 facing away from the battery cell integration device 100. These second guide posts 534 are perpendicular to the second heat exchange plate 532 and are slidably disposed on the sub-capacity rack 510. When the second temperature-controlled drive 531 moves the second heat exchange plate 532, the second guide posts 534 guide the second heat exchange plate 532, ensuring smooth movement.

[0205] Optionally, the second probe driving member 541 is a cylinder, and the second probe driving members 541 are arranged in pairs, and the second probe base 542 is synchronously driven by the two second probe driving members 541. The second probe assembly 540 also includes a fourth mounting base 544, which is fixedly disposed on the formation frame 410, and the second probe driving member 541 is fixedly disposed on the second mounting base 435.

[0206] In this embodiment, the battery cell 10 is provided with poles 11 at both ends along the length direction, and the length direction of the battery cell 10 is parallel to the horizontal direction. Accordingly, two second probe assemblies 540 are provided, and the two second probe assemblies 540 are located on both sides of the battery cell integrated device 100 along the horizontal direction.

[0207] Furthermore, the support 520 has a positioning portion 521 , and the positioning portion 521 abuts against the side surface of the battery cell integrated device 100 during capacity division.

[0208] During use, the battery cell integrated device 100 is sent into the support 520 by the lifting device, and the battery cell integrated device 100 is abutted against the positioning portion 521 to achieve positioning, thereby preventing the battery cell 10 from being placed incorrectly and affecting the test accuracy.

[0209] In summary, the aforementioned battery back-end production equipment utilizes a cell integration device 100 to house multiple cells 10, sequentially performing baking, primary liquid injection, negative pressure formation, and capacity separation on these cells 10. Multiple cells 10 are rotated between various process steps in the form of a battery module assembly 20. Compared to the constant insertion, removal, and rotation of individual cells 10, this simplifies operation and improves production efficiency. Furthermore, the need for turnover boxes is eliminated, addressing the high cost and space requirements of these boxes.

[0210] This embodiment also provides a production process, which is applied to the above-mentioned battery back-end production equipment.

[0211] See also Figure 20 In some embodiments, the production process comprises the following steps:

[0212] S01 , placing the battery cell 10 in the receiving cavity 130 of the battery cell integration device 100 to form a battery module assembly 20 .

[0213] S02, performing at least one of baking, primary liquid injection, negative pressure formation, and volume separation on the battery module assembly 20.

[0214] See also Figure 21 In some other embodiments, the production process includes the following steps:

[0215] S1, scan the QR code and weigh the assembled battery cells after they have passed the helium inspection.

[0216] S2 , placing the battery cell 10 in the receiving cavity 130 of the battery cell integration device 100 to form a battery module assembly 20 .

[0217] Specifically, taking the second partition plate 124 as an example, the second plate body 112, the second partition plate 124, the battery cell 10, the second partition plate 124, the battery cell 10,..., the second partition plate 124, the first elastic member 140 and the second plate body 112 are stacked in sequence on the assembly table, and then pressure is applied to the two second plate bodies 112, and then the first plate body 111 is installed to form a battery module assembly 20.

[0218] S3, baking the battery module assembly 20.

[0219] Specifically, a forklift is used to transport the assembled battery module assembly 20 to the oven platform 220 in the box 210 for vacuum baking.

[0220] S4, performing a liquid injection operation on the battery module assembly 20.

[0221] Specifically, the baked battery module assembly 20 is flipped 90° so that the end of the battery cell 10 provided with the injection hole 12 faces upward, and then a mechanical gripper is used to deliver the battery module assembly 20 into the primary injection device 300. The top plate 330 of the primary injection device 300 is pressed down, and the clamping member 332 is rotated to engage with the card slot 321, limiting the upward movement of the top plate 330, while making the sealing ring 344 on the injection nozzle 341 in close contact with the injection hole 12. The electrolyte designed for a single injection is injected into the injection cup 340, and the primary injection device 300 containing the battery module assembly 20 is sent into the isobaric bell jar together, and vacuuming, pressure relief, standing, pressurization, vacuuming, etc. are carried out for several cycles until the electrolyte in the injection cup 340 is completely injected into the battery cell 10, completing the primary injection.

[0222] After the injection is completed, the top plate 330 is pressed down and the clamping member 332 is unscrewed, and then the top plate 330 is released, and the top plate 330 is bounced up by the third elastic member 322. The battery module assembly 20 is removed, the injection hole 12 is sealed with a sealing plug, and then the battery module assembly 20 is turned over.

[0223] S5, allowing the battery module assembly 20 to stand at high temperature.

[0224] Specifically, the battery module assembly 20 is sent to a high-temperature oven or a high-temperature shelf for high-temperature standing.

[0225] S6 , performing negative pressure forming operation on the battery module assembly 20 .

[0226] Specifically, the battery module assembly 20 is flipped 90° again so that the end of the battery cell 10 provided with the injection hole 12 faces upward. Remove the sealing plug and send the battery module assembly 20 into the negative pressure formation device 400. When the battery module assembly 20 hits the positioning sensor 443, the first temperature control drive 421 starts to work, driving the first heat exchange plate 422 to clamp the battery module assembly 20 in the horizontal direction. The first heat exchange plate 422 heats or cools the battery module assembly 20 to ensure that the temperature of the negative pressure formation process is constant. The first probe drive 431 works, driving the first probe seat 432 to move in the vertical direction, so that the first probe 433 contacts the pole 11, and at the same time presses the suction nozzle 434a with the injection hole 12, starting the formation system to start formation. After the formation is completed, let it stand to disengage the first heat exchange plate 422, the first probe 433 and the suction nozzle 434a, take out the battery module assembly 20, then insert the sealing plug into the injection hole 12, and turn the battery module assembly 20 back.

[0227] S7, allowing the battery module assembly 20 to stand at high temperature.

[0228] S8, disassembling the battery module assembly 20, weighing and re-injecting liquid into the individual battery cells 10.

[0229] After the battery cell 10 is weighed and found to be qualified, the sealing plug is inserted into the liquid injection hole 12 of the battery cell 10 .

[0230] S9, weld the sealing pins and perform helium inspection.

[0231] S10 , the battery cell 10 is again accommodated in the accommodation cavity 130 of the battery cell integration device 100 to form a battery module assembly 20 .

[0232] S11 , performing capacity division operation on the battery module assembly 20 .

[0233] Specifically, the assembled battery module assembly 20 is transported into the capacity separation device 500 using a forklift. The second temperature control driver 531 is activated, causing the second heat exchange plate 532 to clamp the battery module assembly 20, thereby maintaining a constant temperature of the battery module assembly 20. The second probe driver 541 is activated, causing the second probe 543 to contact the terminal 11, thereby activating the capacity separation system and starting capacity separation.

[0234] S12 , disassembling the battery module assembly 20 and screening qualified battery cells 10 .

[0235] Specifically, after the capacity separation is completed, static testing and screening are carried out, the battery module assembly 20 is disassembled, and the qualified battery cells 10 are wrapped with blue film.

[0236] S13, the qualified battery cells 10 are put into storage.

[0237] Specifically, the two ends of the finally qualified battery cells 10 are added with end plates and steel strips to form a battery module, which is then stored in a warehouse.

[0238] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0239] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0240] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that variations and modifications are possible without departing from the scope of the present invention, and such variations and modifications are fully within the scope of protection of the present invention.

Claims

1. A battery back-end production equipment, characterized in that: include: A battery cell integrated device, comprising a housing and at least one separator, wherein the separator is located within the housing and separates an inner cavity of the housing to form at least two accommodating cavities for accommodating battery cells; and At least one of a baking device, a primary liquid injection device, a negative pressure formation device, and a volume separation device; The battery cell integration device forms a battery module assembly by accommodating the battery cells, the baking device is used to bake the battery module assembly, the primary liquid injection device is used to perform a primary liquid injection operation on the battery module assembly, the negative pressure formation device is used to perform a negative pressure formation operation on the battery module assembly, and the capacity division device is used to perform a capacity division operation on the battery module assembly; The housing includes two first plates and two second plates, wherein one of the second plates is detachably connected to one end of the two first plates, and the other second plates are detachably connected to the other end of the two first plates, and the first plates and the second plates together form the inner cavity; The housing has a first direction, and the accommodating cavities are arranged along the first direction; The first plate is parallel to the first direction, and a through hole corresponding to the accommodating cavity is provided on the first plate, and the through hole is connected to the corresponding accommodating cavity so that the pole of the battery cell is exposed through the through hole; The thickness of the first plate is not less than the height of the pole protruding from the surface of the battery cell; A fixing pin is provided on a side of the second plate body facing the first plate body, the fixing pin is perpendicular to the first plate body, and a clamping portion is provided on an end of the fixing pin away from the second plate body, the clamping portion is perpendicular to the second plate body; The first plate is provided with a pin hole for allowing the fixing pin to pass through; The battery cell integrated device further includes a first elastic member that can be elastically deformed in a direction parallel to the clamping portion, and the first elastic member is located in the housing; There are at least two separators, each of which includes a first separator plate, a support plate, and a second elastic member that can be elastically deformed along the thickness direction of the first separator plate. The separators are arranged along the thickness direction of the first separator plate. The support plate is arranged along the thickness direction of the first partition plate, one end of the support plate is connected to the first partition plate, and the other end of the support plate is abutted against the first partition plate of the adjacent partition member; The first partition plate, the support plate, and the first partition plates of the adjacent partitions together form the accommodating cavity, and the second elastic member is located in the accommodating cavity.

2. The battery back-end production equipment according to claim 1, characterized in that: A hole wall of the pin hole at one end away from the second plate body is provided with a groove for the clamping portion to be clamped into.

3. The battery back-end production equipment according to claim 1, characterized in that: The battery back-end production equipment at least includes the baking device, which includes a box and at least one oven platform arranged in the box, and the oven platform includes a support portion, a heating component and a heat-conducting layer; The support portion is arranged on the bottom surface of the inner wall of the box body, the heating component is embedded in the top surface of the support portion, and the heat conductive layer is laid on the top surface of the support portion and the top surface of the heating component.

4. The battery back-end production equipment according to claim 3, characterized in that: The width of the support portion is smaller than the width of the battery cell integrated device.

5. The battery back-end production equipment according to claim 1, characterized in that: The battery back-end production equipment includes at least the primary liquid injection device, which includes: A base plate having a placement area for placing the battery cell integrated device; A plurality of support rods, the support rods being arranged on the bottom plate around the placement area; a top plate slidably disposed on the support rod; and At least two liquid injection cups are provided on the top plate, and each liquid injection cup has a liquid injection nozzle penetrating the top plate.

6. The battery back-end production equipment according to claim 5, characterized in that: The liquid injection cup includes a liquid storage portion and a transition portion; The transition portion is arranged in a bucket shape and has a large end connected to the liquid storage portion and a small end connected to the liquid injection nozzle.

7. The battery back-end production equipment according to claim 5, characterized in that: A sealing ring is sleeved on the liquid injection nozzle, and the sealing ring is used to abut against the outer periphery of the liquid injection hole of the battery core.

8. The battery back-end production equipment according to claim 5, characterized in that: A limiting member is provided on one side of the top plate facing the bottom plate, and the limiting member abuts against the battery cell integrated device during a first injection.

9. The battery back-end production equipment according to claim 5, characterized in that: Two positioning members are provided on a side of the bottom plate facing the top plate, the positioning members having a first positioning surface, a second positioning surface, and a guide surface, the first positioning surface and the second positioning surface are respectively flush with two adjacent boundaries of the placement area, and the guide surface is connected to a side of the second positioning surface away from the first positioning surface; The first positioning surfaces of the two positioning members are flush with each other, and the second positioning surfaces of the two positioning members are arranged opposite to each other.

10. The battery back-end production equipment according to claim 5, characterized in that: The support rod is provided with a card slot and a third elastic member, and the third elastic member is elastically supported on a side of the top plate facing the bottom plate; A clamping piece is movably connected to the top plate, and the clamping piece is engaged with the clamping slot during one injection.

11. The battery back-end production equipment according to claim 1, characterized in that: The battery back-end production equipment at least includes the negative pressure formation device, which includes a formation rack, a first temperature control component and at least one first probe component; The first temperature control assembly includes a first temperature control driving member and a first heat exchange plate, the first temperature control driving member is disposed on the formation rack, and a driving end of the first temperature control driving member is connected to the first heat exchange plate to drive the first heat exchange plate to contact the battery cell; The first probe assembly includes a first probe driver, a first probe seat, and at least two first probes disposed on the first probe seat. The first probe driver is disposed on the formation rack. A driving end of the first probe driver is connected to the first probe seat to drive the first probe to contact the electrode of the battery cell. Wherein, at least two negative pressure cups are provided on the first probe seat of one of the first probe assemblies, and the negative pressure cups have suction nozzles.

12. The battery back-end production equipment according to claim 11, characterized in that: The negative pressure forming device further includes a transmission component, which includes a driving roller, a limiting roller and a positioning sensor; The active roller is rotatably arranged on the forming frame and supports the battery cell integrated device during negative pressure forming; The limiting rollers are rotatably arranged on the forming frame and are distributed in pairs on both sides of the battery cell integrated device during negative pressure forming; The positioning sensing component is used to sense the position of the battery cell integrated device.

13. The battery back-end production equipment according to claim 1, characterized in that: The battery back-end production equipment at least includes the capacity division device, which includes a capacity division rack, a support, a second temperature control component and at least one second probe component; The support is provided on the capacity division rack, and the support carries the battery cell integration device during capacity division; The second temperature control assembly includes a second temperature control driving member and a second heat exchange plate, the second temperature control driving member is disposed on the sub-capacity rack, and a driving end of the second temperature control driving member is connected to the second heat exchange plate to drive the second heat exchange plate to contact the battery cell; The second probe assembly includes a second probe driver, a second probe seat, and at least two second probes arranged on the second probe seat. The second probe driver is arranged on the capacity division rack. The driving end of the second probe driver is connected to the second probe seat to drive the second probe to contact the pole of the battery cell.

14. The battery back-end production equipment according to claim 13, characterized in that: The support has a positioning portion, and the positioning portion abuts against the side surface of the battery cell integrated device during capacity division.

15. A production process, characterized in that: The battery back-end production equipment applied to any one of claims 1 to 14, wherein the production process comprises: Placing the battery cell in the accommodating cavity of the battery cell integration device to form a battery module assembly; The battery module assembly is subjected to at least one operation of baking, primary liquid injection, negative pressure formation and capacity separation.

16. A production process, characterized in that: The battery back-end production equipment applied to any one of claims 1 to 14, wherein the production process comprises: Placing the battery cell in the accommodating cavity of the battery cell integration device to form a battery module assembly; performing a baking operation on the battery module assembly; Performing a liquid injection operation on the battery module assembly; performing a negative pressure forming operation on the battery module assembly; Disassembling the battery module assembly, weighing and re-injecting liquid into each battery cell; The battery cell is again placed in the accommodating cavity of the battery cell integration device to form the battery module assembly; Performing capacity separation on the battery module assembly; Disassembling the battery module assembly and screening qualified battery cells; Wherein, when performing a liquid injection operation and a negative pressure formation operation on the battery module assembly, the battery module assembly is turned over so that the liquid injection hole of the battery cell faces upward.

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