Assembling method of high-energy density laminated battery

Abstract

The invention discloses an assembling method of a high-energy-density laminated battery. The assembling method comprises the following steps: S1, assembling a laminated core group; s2, a first support and a second support are arranged on the left side and the right side of the lamination core set respectively; s3, arranging a positive electrode assembly in the first bracket and electrically connecting the positive electrode assembly with a positive plate of the laminated core group in a contact manner, and arranging a negative electrode assembly in the second bracket and electrically connecting the negative electrode assembly with a negative plate of the laminated core group in a contact manner; s4, wrapping the exposed side surface of the laminated core group by using an insulating tape, and forming a primary packaging module with the laminated core group; and S5, placing the primary packaging module into a shell. The positive electrode assembly and the negative electrode assembly are located on the two opposite sides of the battery respectively, the stacking direction of the pole pieces in the laminated core set is avoided, the arrangement number of the pole pieces can be increased, the laminated core set can be put into the shell, the overall structure is compact, the gap between the battery cell and the shell is reduced, the battery cell rate is increased, and the energy density is improved.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a method for assembling a high-energy-density stacked battery. Background Technology

[0002] In existing batteries, most have the positive and negative electrodes located at the top and bottom ends. For stacked batteries, the placement of the positive and negative electrodes at the top and bottom ends is also in the stacking direction of the cells. Inside the battery casing, the positive and negative electrodes occupy a certain amount of space, which is not conducive to higher-density stacking, improving the cell rate, and is also inconvenient during installation. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an assembly method for high-energy-density stacked batteries that is easy to assemble, has a compact structure, and improves the cell rate.

[0004] The technical solution adopted by this invention to solve its technical problem is: to provide a method for assembling a high-energy-density stacked battery, comprising the following steps: S1. Assemble a stacked core assembly, the stacked core assembly including positive and negative electrode sheets alternately stacked in the vertical direction, and a separator sheet stacked between the positive and negative electrode sheets; S2. The first bracket and the second bracket are respectively disposed on opposite sides of the stacked core assembly; S3. The positive electrode assembly is placed in the first support and electrically connected to the positive electrode sheet of the stacked core assembly; the negative electrode assembly is placed in the second support and electrically connected to the negative electrode sheet of the stacked core assembly. S4. Use insulating tape to cover the exposed sides of the laminated core assembly to form a preliminary encapsulation module with the laminated core assembly; S5. Place the preliminary packaging module into the housing and expose the positive electrode component in the corresponding through hole on the side of the housing.

[0005] Preferably, in the stacked core assembly, each of the positive electrode sheets has a protruding first extension on one side, and the first extensions of all the positive electrode sheets are on the same side; each of the negative electrode sheets has a protruding second extension on one side, and the second extensions of all the negative electrode sheets are on the same side. In step S2, the first extension of all the positive electrode sheets is located within the first support, and the second extension of all the negative electrode sheets is located within the second support.

[0006] Preferably, in step S3, the positive electrode assembly includes a positive electrode tab, a positive electrode post, and a positive electrode rubber ring; the setting step of the positive electrode assembly includes: attaching the positive electrode tab to the side of the first extension, abutting the positive electrode post against the positive electrode tab, and fitting the positive electrode rubber ring onto the outer periphery of the positive electrode post; In step S5, the positive electrode post and the positive electrode rubber ring protrude from the through hole.

[0007] Preferably, in step S1, all the first extensions are divided into several first connection groups, each first connection group has multiple first extensions, and all the first extensions in the first connection group are arranged vertically and parallel to each other at the end away from the positive electrode to form a first conductive part. In step S3, the positive electrode assembly includes a positive electrode tab, the positive electrode tab includes a positive electrode bending piece and a positive electrode connecting piece connected to the positive electrode bending piece, the positive electrode bending piece has multiple bending grooves arranged vertically; the setting step of the positive electrode assembly includes: placing the positive electrode bending piece with the bending grooves facing the stacked core group and placing it on one side of the stacked core group, so that the first conductive part is embedded in the corresponding bending groove and fixed in the bending groove by riveting; the positive electrode connecting piece is located on the side of the positive electrode bending piece facing away from the stacked core group; In step S5, the positive electrode connector exposes the through hole.

[0008] Preferably, in step S3, the negative electrode assembly includes a negative electrode tab and a negative electrode contact; the setting step of the negative electrode assembly includes: attaching the negative electrode tab to the side of the second extension portion, and abutting the negative electrode contact against the negative electrode tab; wherein, the negative electrode tab also extends and bends along the stacking direction of the stacked core assembly, and is located above one end of the stacked core assembly.

[0009] Preferably, in step S1, all the second extensions are divided into several second connection groups, each second connection group has multiple second extensions, and all the second extensions in the second connection group are arranged vertically and parallel to each other at the end away from the negative electrode to form a second conductive part. In step S3, the negative electrode assembly includes a negative electrode tab; the negative electrode tab includes a negative electrode bending piece and a negative electrode connecting piece connected to the negative electrode bending piece, the negative electrode bending piece having multiple bending grooves arranged vertically; the setting step of the negative electrode assembly includes: placing the negative electrode bending piece with the bending grooves facing the stacked core assembly and placing it on one side of the stacked core assembly, so that the second conductive part is embedded in the corresponding bending groove and fixed in the bending groove by riveting; the negative electrode connecting piece is located above one end of the stacked core assembly.

[0010] Preferably, in step S5, the negative electrode assembly is electrically connected to the housing; and / or, the negative electrode assembly is exposed in a corresponding through hole on the side of the housing.

[0011] Preferably, in step S5, before placing the preliminary packaging module into the housing, an insulating sheet is placed at at least one end of the preliminary packaging module.

[0012] Preferably, the laminated core assembly has two opposing long sides and two opposing short sides; in step S2, the first support and the second support are respectively disposed on the two short sides of the laminated core assembly.

[0013] Preferably, the assembly method of the high-energy-density stacked battery further includes the following steps: S6. Electrolyte is injected into the housing through the injection hole on the housing.

[0014] The beneficial effects of this invention are: by placing the positive and negative electrode components on opposite sides of the battery, the stacking direction of the electrode sheets in the stacked core assembly is avoided, which is conducive to increasing the number of electrode sheets and placing the stacked core assembly into the housing. The overall structure is compact, the gap between the cell and the housing is reduced, the cell rate is increased, and the energy density is increased.

[0015] The assembly method of the present invention is conducive to automated production and mass production. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a high-energy-density stacked battery according to an embodiment of the present invention; Figure 2 yes Figure 1 A bottom view of the high-energy-density stacked battery shown; Figure 3 yes Figure 1 The exploded view of the high-energy-density stacked battery shown. Figure 4 This is a schematic diagram of the structure of the stacked core assembly covered with insulating tape in a high-energy-density stacked battery according to another embodiment of the present invention; Figure 5 yes Figure 4 The diagram shows the structure of the stacked core assembly. Figure 6 yes Figure 4 The exploded view of the stacked core assembly shown. Detailed Implementation

[0017] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0018] refer to Figures 1-3 As shown, an embodiment of the present invention provides a method for assembling a high-energy-density stacked battery, comprising the following steps: S1, Assemble the stacked core assembly 20.

[0019] The laminated core assembly 20 includes several positive electrode plates 21, several negative electrode plates 22, and several separator plates 23. During assembly, the positive electrode plates 21 and negative electrode plates 22 are alternately stacked vertically, and the separator plates 23 are stacked between the positive electrode plates 21 and negative electrode plates 22. The positive electrode plates 21 and negative electrode plates 22 have the same shape and dimensions, and their shapes also determine the shape of the laminated core assembly 20. The separator plates 23 act as insulation between the positive electrode plates 21 and negative electrode plates 22, and their outer circumferential dimensions are equal to or smaller than the outer circumferential dimensions of the positive electrode plate 21 / negative electrode plate 22.

[0020] The stacking direction of the positive electrode 21 and the negative electrode 22 corresponds to the height direction of the stacked core assembly 20. In one embodiment, at opposite ends of the stacked core assembly 20 in the height direction, one end has a positive electrode 21 and the other end has a negative electrode 22.

[0021] Each positive electrode 21 has a protruding first extension 211 on one side, and the first extensions 211 of all positive electrode 21s are on the same side. Each negative electrode 22 has a protruding second extension 221 on one side, and the second extensions 221 of all negative electrode 22s are on the same side. Therefore, the first extension 211 is on one side of the stacked core assembly 20 (as on the left), and the second extension 221 is on the opposite side of the stacked core assembly 20 (as on the right).

[0022] S2. The first support 31 and the second support 32 are respectively set on opposite sides of the stacked core group 20.

[0023] The first support 31 is disposed on one side of the laminated core assembly 20, surrounding the outer periphery of the first extension 211, and limiting the first extensions 211 of all positive electrode plates 21 within it. The second support 32 is disposed on the opposite side of the laminated core assembly 20, surrounding the outer periphery of the second extension 221, and limiting the second extensions 221 of all negative electrode plates 22 within it.

[0024] In one embodiment, the first support 31 may include two support walls, which are disposed opposite to each other on one side of the laminated core assembly 20, and the first extension 211 is located between the two support walls. Alternatively, the first support 31 includes a frame portion and two support walls connected to opposite sides of the frame portion. The first support 31 is fitted to one side of the laminated core assembly 20 through the frame portion, and the first extension 211 passes through the frame portion and is located between the two support walls.

[0025] The structure of the second support 32 can be set with reference to the first support 31, such as including two support walls, or including a frame and two support walls, which will not be elaborated here.

[0026] exist Figures 1-3In the embodiment shown, the laminated core assembly 20 is generally flat and cylindrical, with two opposite long sides and two opposite short sides. The first support 31 and the second support 32 are respectively disposed on the two short sides of the laminated core assembly 20.

[0027] Furthermore, the stacked core assembly 20 has two opposing arc surfaces and two opposing straight surfaces, with the two straight surfaces connected between the two arc surfaces; the two arc surfaces correspond to the long side, and the straight surfaces correspond to the short side. The arrangement of the two straight surfaces is more conducive to the stable placement of the first support 31 and the second support 32 on them, and also facilitates the cooperation of the positive electrode assembly 40 and the negative electrode assembly 50 on the straight surfaces and their conductive connection with the corresponding electrode sheets.

[0028] The first bracket 31 and the second bracket 32 ​​are made of insulating materials such as plastic.

[0029] S3. The positive electrode assembly 40 is placed in the first bracket 31 and electrically connected to the positive electrode plate 21 of the laminated core assembly 20. The negative electrode assembly 50 is placed in the second bracket 32 ​​and electrically connected to the negative electrode plate 22 of the laminated core assembly 20.

[0030] exist Figure 3 In the illustrated embodiment, the positive electrode assembly 40 includes a positive electrode tab 41, a positive electrode post 42, and a positive electrode rubber ring 43. The steps for setting up the positive electrode assembly 40 include: attaching the positive electrode tab 41 to the side of the first extension 211 away from the positive electrode plate 21 and electrically connecting it to the first extension 211; abutting the positive electrode post 42 against the side of the positive electrode tab 41 facing away from the positive electrode plate 21 and making contact with the positive electrode tab 41 for electrical connection; and fitting the positive electrode rubber ring 43 onto the outer periphery of the positive electrode post 42. The positive electrode rubber ring 43 is an insulating component.

[0031] In order to improve the contact stability between the positive electrode tab 41 and the positive electrode post 42, the positive electrode tab 41 is bent to form a spring-loaded structure, which always has a tendency to return to the positive electrode post 42, so that it maintains contact and connection with the positive electrode post 42.

[0032] exist Figure 3 In the illustrated embodiment, the negative electrode assembly 50 includes a negative electrode tab 51 and a negative electrode contact 52. The steps for setting the negative electrode assembly 50 include: the negative electrode tab 51 abutting against the side of the second extension 221 away from the negative electrode sheet 22 and making contact with the second extension 221; the negative electrode contact 52 abutting against the side of the negative electrode tab 51 facing away from the negative electrode sheet 22 and making contact with the negative electrode tab 51. The negative electrode tab 51 also extends and bends along the stacking direction of the laminated core assembly 20, and is positioned above one end of the laminated core assembly 20.

[0033] The positive electrode tab 41 and the negative electrode tab 51 can be made of pure nickel. The positive electrode post 42 is made of aluminum alloy.

[0034] S4. Use insulating tape 12 to cover the exposed sides of the laminated core assembly 20 to form a preliminary encapsulation module with the laminated core assembly 20.

[0035] With the first support 31 and the second support 32 positioned on opposite sides of the laminated core assembly 20, the insulating tape 12 primarily covers the exposed sides of the laminated core assembly 20 (the sides other than where the first support 31 and the second support 32 are located). The insulating tape 12 may further consist of two separate strips, each covering a different side of the laminated core assembly 20.

[0036] In an embodiment where the laminated core assembly 20 has a long side and a short side, the insulating tape 12 is wrapped around the long side and can be bent and attached to the portion of the short side not covered by the first support 31 and the second support 32.

[0037] S5. Place the preliminary encapsulation module into the housing 11 and expose the positive electrode component 40 in the corresponding through hole 110 on the side of the housing 11.

[0038] Combination Figure 3 The positive electrode assembly 40 is shown to have a positive electrode post 42 and a positive electrode rubber ring 53 protruding from the through hole 110. The negative electrode assembly 50 may be enclosed in the housing 11 and electrically connected to the housing 11; and / or, the negative electrode assembly 50 may be exposed in a corresponding through hole on the side of the housing 11.

[0039] Optionally, the through hole 110 on the housing 11 can be configured to correspond to the inner ring shape of the first bracket 31. After the positive electrode assembly 40 is assembled, a cover 113 is used to seal the through hole 110. The cover 113 has a hole 114 to expose the positive electrode post 42 and the positive electrode rubber ring 43. The positive electrode rubber ring 43 is positioned around the positive electrode post 42 to isolate the positive electrode post 42 from the cover plate 111, preventing contact electrical connection.

[0040] To facilitate the placement of the preliminary packaging module into the housing 11, the housing 11 may further include a bottom shell 111 with an open top and a top cover 112 that fits the top of the bottom shell 111. The preliminary packaging module is placed into the bottom shell 111 through its open top, and the top cover 112 is connected to the top of the bottom shell 111 by means of interference fit, snap-fit, or other methods, thereby closing the open top of the bottom shell 111 and enclosing the preliminary packaging module inside the housing 11.

[0041] Preferably, the housing 11 is made of aluminum alloy.

[0042] Furthermore, before placing the preliminary encapsulation module into the housing 11, an insulating sheet 13 is placed at at least one end of the preliminary encapsulation module. When the insulating sheet 13 is provided on one end of the stacked core assembly 20 where the negative electrode tab 51 is located, the insulating sheet 13 has a relief groove 130 corresponding to the position of the negative electrode tab 51, so that the negative electrode tab 51 can make contact and electrical connection with the housing 11 through the relief groove 130.

[0043] The housing 11, along with insulating tape 12, insulating sheet 13, etc., can constitute the outer shell 10 of the battery. The stacked core assembly 20 is encapsulated inside the outer shell 10, and the positive electrode assembly 40 is exposed through the through hole 110.

[0044] To ensure safety, an explosion-proof valve 14 is provided on the outer casing 10. The explosion-proof valve 14 can be installed on the top cover 112.

[0045] S6. Electrolyte is injected into the housing 11 through the injection hole 15 on the housing 11, so that the stacked core assembly 20 is immersed in the electrolyte.

[0046] When injecting electrolyte, the injection hole 15 is opened, and the electrolyte is filled into the housing 11 through the injection hole 15; after the injection is completed, the injection hole 15 is sealed with a plug or the like. The injection hole 15 can be provided on the bottom shell 111, specifically on the bottom plate of the bottom shell 111.

[0047] In summary, the assembly of the high-energy-density stacked battery is completed. The positive electrode assembly 40 and the negative electrode assembly 50 are positioned on opposite sides of the stacked core assembly 20, so that both ends of the stacked core assembly 20 can be as close as possible to or fit against the outer casing in the stacking direction (height direction), reducing gaps, making the structure compact, and facilitating an increase in the number of stacked electrodes and improving the cell rate.

[0048] like Figures 4-6 As shown, another embodiment of the present invention describes a method for assembling a high-energy-density stacked battery, comprising the following steps: S1, Assemble the stacked core assembly 20.

[0049] The laminated core assembly 20 includes several positive electrode plates 21, several negative electrode plates 22, and several separator plates 23. During assembly, the positive electrode plates 21 and negative electrode plates 22 are alternately stacked vertically, and the separator plates 23 are stacked between the positive electrode plates 21 and negative electrode plates 22. The positive electrode plates 21 and negative electrode plates 22 have the same shape and dimensions, and their shapes also determine the shape of the laminated core assembly 20. The separator plates 23 act as insulation between the positive electrode plates 21 and negative electrode plates 22, and their outer circumferential dimensions are equal to or smaller than the outer circumferential dimensions of the positive electrode plate 21 / negative electrode plate 22.

[0050] The stacking direction of the positive electrode 21 and the negative electrode 22 corresponds to the height direction of the stacked core assembly 20. In one embodiment, at opposite ends of the stacked core assembly 20 in the height direction, one end has a positive electrode 21 and the other end has a negative electrode 22.

[0051] Each positive electrode 21 has a protruding first extension 211 on one side, and the first extensions 211 of all positive electrode 21s are on the same side. Each negative electrode 22 has a protruding second extension 221 on one side, and the second extensions 221 of all negative electrode 22s are on the same side. Therefore, the first extension 211 is located on one side of the stacked core group 20 (as shown on the left side), and the second extension 221 is located on the opposite side of the stacked core group 20 (as shown on the right side). In step S1, all the first extensions are divided into several first connection groups, and each first connection group has multiple first extensions. The ends of all the first extensions in the first connection group that are away from the positive electrode are arranged vertically and parallel to each other to form a first conductive part. exist Figure 6 In the illustrated embodiment, all positive electrode plates 21 are divided into multiple groups arranged vertically, and all corresponding first extensions 211 are divided into several first connection groups 210. Each first connection group 210 has multiple first extensions 211. The ends of all first extensions 211 in the first connection group 210 that are away from the positive electrode plate 21 are arranged vertically and parallel to each other to form a first conductive part 212.

[0052] Since the positive electrode plates 21 and their first extensions 211 are positioned at different heights, in order to make the ends of all the first extensions 211 in the first connection group 210 that are away from the positive electrode plates 21 parallel, the end of the first extension 211 in the middle that is away from the positive electrode plate 21 is horizontally positioned, while the ends of the first extensions 211 on both sides that are away from the positive electrode plates 21 are bent towards the middle, and the bending angle of the ends of the first extensions 211 on both sides gradually increases from the middle to both sides. That is, the farther the first extensions 211 on both sides are from the first extension 211 in the middle, the larger their bending angle.

[0053] exist Figure 6 In the illustrated embodiment, all negative electrode plates 22 are divided into multiple groups arranged vertically, and all corresponding second extensions 221 are divided into several second connection groups 220. Each second connection group 220 has multiple second extensions 221. The ends of all second extensions 221 in the second connection group 220 that are away from the negative electrode plate 22 are arranged vertically and parallel to each other to form a second conductive portion 222.

[0054] Since the negative electrode plates 22 and their second extensions 221 are positioned at different heights, in order to make the ends of all the second extensions 221 in the second connection group 220 that are away from the negative electrode plates 22 parallel, the end of the second extension 221 in the middle that is away from the negative electrode plate 22 is horizontally arranged, and the ends of the second extensions 221 on both sides that are away from the negative electrode plates 22 are bent towards the middle, and the bending angle of the ends of the second extensions 221 on both sides gradually increases from the middle to both sides. That is, the farther the second extensions 221 on both sides are from the second extension 221 in the middle, the larger their bending angle.

[0055] S2. The first support 31 and the second support 32 are respectively set on opposite sides of the stacked core group 20.

[0056] The first support 31 is disposed on one side of the laminated core assembly 20, surrounding the outer periphery of the first extension 211, and limiting the first extensions 211 of all positive electrode plates 21 within it. The second support 32 is disposed on the opposite side of the laminated core assembly 20, surrounding the outer periphery of the second extension 221, and limiting the second extensions 221 of all negative electrode plates 22 within it.

[0057] In one embodiment, the first support 31 may include two support walls, which are disposed opposite to each other on one side of the laminated core assembly 20, and the first extension 211 is located between the two support walls. Alternatively, the first support 31 includes a frame portion and two support walls connected to opposite sides of the frame portion. The first support 31 is fitted to one side of the laminated core assembly 20 through the frame portion, and the first extension 211 passes through the frame portion and is located between the two support walls.

[0058] The structure of the second support 32 can be set with reference to the first support 31, such as including two support walls, or including a frame and two support walls, which will not be elaborated here.

[0059] exist Figures 4-6 In the embodiment shown, the laminated core assembly 20 is generally flat and cylindrical, with two opposite long sides and two opposite short sides. The first support 31 and the second support 32 are respectively disposed on the two short sides of the laminated core assembly 20.

[0060] Furthermore, the stacked core assembly 20 has two opposing arc surfaces and two opposing straight surfaces, with the two straight surfaces connected between the two arc surfaces; the two arc surfaces correspond to the long side, and the straight surfaces correspond to the short side. The arrangement of the two straight surfaces is more conducive to the stable placement of the first support 31 and the second support 32 on them, and also facilitates the cooperation of the positive electrode assembly 40 and the negative electrode assembly 50 on the straight surfaces and their conductive connection with the corresponding electrode sheets.

[0061] The first bracket 31 and the second bracket 32 ​​are made of insulating materials such as plastic.

[0062] S3. The positive electrode assembly 40 is placed in the first bracket 31 and electrically connected to the positive electrode plate 21 of the laminated core assembly 20. The negative electrode assembly 50 is placed in the second bracket 32 ​​and electrically connected to the negative electrode plate 22 of the laminated core assembly 20.

[0063] exist Figures 4-6In the illustrated embodiment, the positive electrode assembly 40 includes a positive electrode tab 41. The positive electrode tab 41 further includes a positive electrode bending piece 411 and a positive electrode connecting piece 412 connected to the positive electrode bending piece 411. The positive electrode bending piece 411 has a plurality of vertically arranged bending grooves 410. The setting steps of the positive electrode assembly 40 include: placing the positive electrode bending piece 411 with the bending grooves 410 facing the stacked core assembly 20 and on one side of the stacked core assembly 20, so that the first conductive part 212 is embedded in the corresponding bending groove 410 and fixed in the bending groove 410 by riveting, so that the first conductive part 212 is fixedly connected to the positive electrode bending piece 411 and electrically connected; the positive electrode connecting piece 412 is located on the side of the positive electrode bending piece 411 facing away from the stacked core assembly 20. The number and position of the bending grooves 410 correspond to the number and position of the first guide parts 212, and the first guide part 212 of each first connection group 210 is accommodated in the corresponding bending groove 410.

[0064] exist Figures 4-6 In the illustrated embodiment, the negative electrode assembly 50 includes a negative electrode tab 51. The negative electrode tab 51 may further include a negative electrode bending piece 511 and a negative electrode connecting piece 512 connected to the negative electrode bending piece 511. The negative electrode bending piece 511 has a plurality of vertically arranged bending grooves 510. The setting steps of the negative electrode assembly 50 include: placing the negative electrode bending piece 511 with the bending grooves 510 facing the stacked core assembly 20 and on one side of the stacked core assembly 20, so that the second conductive part 222 is embedded in the corresponding bending groove 510 and fixed in the bending groove 510 by riveting, so that the second conductive part 222 is fixedly connected to the negative electrode bending piece 511 and electrically connected; the negative electrode connecting piece 512 is located above one end of the stacked core assembly 20. The number and position of the bending grooves 510 correspond to the number and position of the second conductive parts 222, and the second conductive part 222 of each second connecting group 220 is accommodated in the corresponding bending groove 510.

[0065] The positive electrode tab 41 and the negative electrode tab 51 can be made of pure nickel.

[0066] S4. Use insulating tape 12 to cover the exposed sides of the laminated core assembly 20 to form a preliminary encapsulation module with the laminated core assembly 20.

[0067] With the first support 31 and the second support 32 positioned on opposite sides of the laminated core assembly 20, the insulating tape 12 primarily covers the exposed sides of the laminated core assembly 20 (the sides other than where the first support 31 and the second support 32 are located). The insulating tape 12 may further consist of two separate strips, each covering a different side of the laminated core assembly 20.

[0068] In an embodiment where the laminated core assembly 20 has a long side and a short side, the insulating tape 12 is wrapped around the long side and can be bent and attached to the portion of the short side not covered by the first support 31 and the second support 32.

[0069] S5. Place the preliminary encapsulation module into the housing 11, and expose the positive electrode component 40 in the corresponding through hole 110 on the side of the housing 11 (refer to the housing 11 and through hole 110, etc.). Figures 1-3 (As shown).

[0070] Combination Figure 6 The positive electrode assembly 40 shown is composed of a positive electrode connector 412 exposed through a corresponding through hole 110, which serves as the positive terminal of the battery.

[0071] The negative electrode connector 512 of the negative electrode assembly 50 serves as the negative terminal of the battery. It can be exposed or enclosed in the housing 11 through the corresponding through hole and is electrically connected to the housing 11.

[0072] To facilitate the placement of the preliminary packaging module into the housing 11, the housing 11 may further include a bottom shell 111 with an open top and a top cover 112 that fits the top of the bottom shell 111. The preliminary packaging module is placed into the bottom shell 111 through its open top, and the top cover 112 is connected to the top of the bottom shell 111 by means of interference fit, snap-fit, or other methods, thereby closing the open top of the bottom shell 111 and enclosing the preliminary packaging module inside the housing 11.

[0073] Furthermore, before placing the preliminary encapsulation module into the housing 11, an insulating sheet 13 is placed at at least one end of the preliminary encapsulation module. When the insulating sheet 13 is provided on one end of the stacked core assembly 20 where the negative electrode tab 51 is located, the insulating sheet 13 has a relief groove 130 corresponding to the position of the negative electrode tab 51, so that the negative electrode tab 51 can make contact and electrical connection with the housing 11 through the relief groove 130.

[0074] The housing 11, along with insulating tape 12, insulating sheet 13, etc., can constitute the battery casing 10 (see casing 10 and insulating sheet 13, etc.). Figures 1-3 As shown, the stacked core assembly 20 is encapsulated within the housing 10, and the positive electrode assembly 40 is exposed through the through hole 110 within the housing 10.

[0075] To ensure safety, an explosion-proof valve 14 is provided on the outer casing 10. The explosion-proof valve 14 can be installed on the top cover 112.

[0076] S6. Electrolyte is injected into the housing 11 through the injection hole 15 on the housing 11, so that the stacked core assembly 20 is immersed in the electrolyte (injection hole 15 reference). Figure 2 (As shown).

[0077] When injecting electrolyte, the injection hole 15 is opened, and the electrolyte is filled into the housing 11 through the injection hole 15; after the injection is completed, the injection hole 15 is sealed with a plug or the like. The injection hole 15 can be provided on the bottom shell 111, specifically on the bottom plate of the bottom shell 111.

[0078] In summary, the assembly of the high-energy-density stacked battery is completed. The positive electrode assembly 40 and the negative electrode assembly 50 are positioned on opposite sides of the stacked core assembly 20, so that both ends of the stacked core assembly 20 can be as close as possible to or fit against the outer casing in the stacking direction (height direction), reducing gaps, making the structure compact, and facilitating an increase in the number of stacked electrodes and improving the cell rate.

[0079] In the assembly method of a high-energy-density stacked battery in other embodiments of the present invention, the positive electrode component 40 is... Figure 3 The structure of the positive electrode component 40 in the illustrated embodiment is shown, and the negative electrode component 50 is... Figure 6 The structure of the negative electrode component 50 in the illustrated embodiment. Alternatively, the positive electrode component 40 is... Figure 6 The structure of the positive electrode component 40 in the illustrated embodiment is shown, and the negative electrode component 50 is... Figure 3 The structure of the negative electrode component 50 in the illustrated embodiment.

[0080] In the assembly method of high energy density stacked cells in other embodiments of the present invention, steps S3, S4 and S5 may be partially interchanged.

[0081] Specifically, in step S3, insulating tape 12 is used to cover the exposed sides of the laminated core assembly 20 to form a preliminary encapsulation module with the laminated core assembly 20.

[0082] In step S4, the preliminary packaging module is placed into the housing 11, and the first bracket 31 is exposed in the corresponding through hole 110 on the side of the housing 11.

[0083] In step S5, the positive electrode assembly 40 is placed inside the first support 31 and electrically connected to the positive electrode plate 21 of the laminated core assembly 20.

[0084] In step S3, the negative electrode assembly 50 can be disposed within the second bracket 32 ​​and electrically connected to the negative electrode sheet 22 of the laminated core assembly 20. Alternatively, in step S4, the second bracket 32 ​​is exposed in the corresponding through hole on the side of the housing 11, and in step S5, the negative electrode assembly 50 is disposed within the second bracket 32 ​​and electrically connected to the negative electrode sheet 22 of the laminated core assembly 20.

[0085] The assembly method of the present invention is conducive to automated production and mass production.

[0086] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for assembling a high-energy-density stacked battery, characterized in that, Includes the following steps: S1. Assemble a stacked core assembly, the stacked core assembly including positive and negative electrode sheets alternately stacked in the vertical direction, and a separator sheet stacked between the positive and negative electrode sheets; S2. The first bracket and the second bracket are respectively disposed on opposite sides of the stacked core assembly; S3. The positive electrode assembly is placed in the first support and electrically connected to the positive electrode sheet of the stacked core assembly; the negative electrode assembly is placed in the second support and electrically connected to the negative electrode sheet of the stacked core assembly. S4. Use insulating tape to cover the exposed sides of the laminated core assembly to form a preliminary encapsulation module with the laminated core assembly; S5. Place the preliminary packaging module into the housing and expose the positive electrode component in the corresponding through hole on the side of the housing.

2. The assembly method of the high energy density stacked battery according to claim 1, characterized in that, In the stacked core assembly, each of the positive electrode sheets has a protruding first extension on one side, and the first extensions of all the positive electrode sheets are on the same side; each of the negative electrode sheets has a protruding second extension on one side, and the second extensions of all the negative electrode sheets are on the same side. In step S2, the first extension of all the positive electrode sheets is located within the first support, and the second extension of all the negative electrode sheets is located within the second support.

3. The assembly method of the high energy density stacked battery according to claim 2, characterized in that, In step S3, the positive electrode assembly includes a positive electrode tab, a positive electrode post, and a positive electrode rubber ring; the steps for setting the positive electrode assembly include: attaching the positive electrode tab to the side of the first extension, abutting the positive electrode post against the positive electrode tab, and fitting the positive electrode rubber ring onto the outer periphery of the positive electrode post; In step S5, the positive electrode post and the positive electrode rubber ring protrude from the through hole.

4. The assembly method of the high energy density stacked battery according to claim 2, characterized in that, In step S1, all the first extensions are divided into several first connection groups, each first connection group has multiple first extensions, and all the first extensions in the first connection group are arranged vertically and parallel to each other at the end away from the positive electrode to form a first conductive part. In step S3, the positive electrode assembly includes a positive electrode tab, the positive electrode tab includes a positive electrode bending piece and a positive electrode connecting piece connected to the positive electrode bending piece, the positive electrode bending piece has multiple bending grooves arranged vertically; the setting step of the positive electrode assembly includes: placing the positive electrode bending piece with the bending grooves facing the stacked core group and placing it on one side of the stacked core group, so that the first conductive part is embedded in the corresponding bending groove and fixed in the bending groove by riveting; the positive electrode connecting piece is located on the side of the positive electrode bending piece facing away from the stacked core group; In step S5, the positive electrode connector exposes the through hole.

5. The assembly method of the high energy density stacked battery according to claim 2, characterized in that, In step S3, the negative electrode assembly includes a negative electrode tab and a negative electrode contact; the setting step of the negative electrode assembly includes: attaching the negative electrode tab to the side of the second extension portion, and abutting the negative electrode contact against the negative electrode tab; wherein, the negative electrode tab also extends and bends along the stacking direction of the stacked core assembly, and is located above one end of the stacked core assembly.

6. The assembly method of the high energy density stacked battery according to claim 2, characterized in that, In step S1, all the second extensions are divided into several second connection groups, each second connection group has multiple second extensions, and all the second extensions in the second connection group are arranged vertically and parallel to each other at the end away from the negative electrode to form a second conductive part. In step S3, the negative electrode assembly includes a negative electrode tab; the negative electrode tab includes a negative electrode bending piece and a negative electrode connecting piece connected to the negative electrode bending piece, the negative electrode bending piece having multiple bending grooves arranged vertically; the setting step of the negative electrode assembly includes: placing the negative electrode bending piece with the bending grooves facing the stacked core assembly and placing it on one side of the stacked core assembly, so that the second conductive part is embedded in the corresponding bending groove and fixed in the bending groove by riveting; the negative electrode connecting piece is located above one end of the stacked core assembly.

7. The method for assembling a high-energy-density stacked battery according to any one of claims 1-6, characterized in that, In step S5, the negative electrode assembly is electrically connected to the housing; and / or, the negative electrode assembly is exposed in a corresponding through hole on the side of the housing.

8. The method for assembling a high-energy-density stacked battery according to any one of claims 1-6, characterized in that, In step S5, before placing the preliminary packaging module into the housing, an insulating sheet is placed at at least one end of the preliminary packaging module.

9. The method for assembling a high-energy-density stacked battery according to any one of claims 1-6, characterized in that, The laminated core assembly has two opposite long sides and two opposite short sides; in step S2, the first bracket and the second bracket are respectively disposed on the two short sides of the laminated core assembly.

10. The method for assembling a high-energy-density stacked battery according to any one of claims 1-6, characterized in that, The assembly method of the high-energy-density stacked battery also includes the following steps: S6. Electrolyte is injected into the housing through the injection hole on the housing.

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