Prefabricated battery, battery array, battery pack, and method for manufacturing the same

Abstract

To provide a prefabricated battery which does not need to be welded with a busbar any more, and with which the manufacturing process of the electric connection and the structural connection between the single batteries in the row or the group is simplified and the stability of the structural connection part and the electric connection part is improved, a battery row, a battery pack and a preparation method thereof.SOLUTION: A prefabricated battery comprises a single cylindrical battery, a circumferential fixing part 200 and a conducting strip 300, the circumferential fixing part is made of a sheet-shaped material, and at least part of the circumferential fixing part is arranged around a shell 130 on the side surface of the single cylindrical battery. The conducting strip comprises a connecting section and an extending section, and the connecting section is clamped between the circumferential fixing part and the side shell. At least a partial area of one side of the connecting section is fixedly connected to the inner side surface of the circumferential fixing part, and the other side of the connecting section is fixedly and electrically connected with the side shell through a conductive adhesive. The extension section extends in a direction far away from the circumferential fixing part, and / or extends in a bending manner, and the extension section is used for connecting to the other prefabricated batteries.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to the field of new energy power batteries, and particularly to prefabricated batteries, battery strings, battery packs and their manufacturing methods.

Background Art

[0002] The shell of a cylindrical single battery is one of the battery's polarity posts. When applied as a pack, in order to surround the shell post and usually: 1. A busbar that can be electrically connected is required to overlap the main current path between batteries; 2. Electrical isolation is required between adjacent shells in the series connection circuit of the batteries; 3. It is necessary to electrically connect the monitoring conductor to overlap the electrical connection path between the battery and the external monitoring circuit; 4. The battery shells stacked up and down form an oval cylinder, and it is necessary to structurally connect between the upper and lower shells; 5. The single battery is connected to an external structure, and under a vibrating state, in order to improve the stability of the electrical connection point, it is necessary to block the conduction of external stress to the electrical connection point.

[0003] In the prior art, usually, a metal welding technique (electrical connection + structural connection) by high-temperature welding is adopted to realize a busbar with the same material and the same thickness, and to realize the electrical connection between the monitoring conductive strip and the shell. Under the current conditions of the supply chain of thin nickel shells, with the increase in the diameter (capacity) of the single battery, it becomes difficult to select a thicker busbar or a thinner and lighter monitoring conductive strip. In the existing cold pressure welding adhesive electrical connection technology, since the peel resistance of the adhesive is relatively weak, when a large peeling force is applied to the electrical connection point under a vibrating state, it clearly affects the stability of the electrical connection point.

Summary of the Invention

Means for Solving the Problems

[0004] The present invention discloses a prefabricated battery, a battery string, a battery pack and their manufacturing methods for solving a series of problems existing in the prior art. In the first aspect, this application provides a prefabricated battery, said prefabricated battery, A cylindrical single cell having a shell post including a side shell and a bottom shell, and an upper post, A circumferential fixing portion made of a flake material, at least a portion of which is provided around the side shell of a cylindrical single cell,

[0005] The present invention includes at least one conductive strip comprising a connecting portion and an extending portion, wherein the connecting portion is interposed between a circumferential fixing portion and a side shell, at least a portion of one side of the connecting portion is fixedly connected to the inner surface of the circumferential fixing portion, the other side of the connecting portion is fixedly connected to the side shell with a conductive adhesive and electrically connected, and the extending portion extends away from the circumferential fixing portion and / or extends by bending, and is used to connect to the upper post or shell post of another prefabricated battery.

[0006] In a second aspect, the present application provides a battery array in which several prefabricated batteries as described above are arranged in a row. The top post of the leading prefabricated battery is the external top post of the battery row, and the side shell, bottom shell, or conductive strip of the last prefabricated battery is the external shell post of the battery row. Except for the last prefabricated battery, the extended portion of the conductive strip of each prefabricated battery is sequentially attached to the upper post of the adjacent prefabricated battery and electrically connected, forming a series battery array.

[0007] A preferred technical solution further provides another battery array, wherein the multiple prefabricated batteries described above are arranged in a row in the same direction, The extended portion of the conductive strip of each prefabricated battery is bonded to the side shell of an adjacent prefabricated battery and electrically connected, or the extended portion of each prefabricated battery is bonded to the extended portion of an adjacent prefabricated battery and electrically connected, forming a battery row in which shell posts are connected in parallel.

[0008] A preferred technical solution is to further provide a series of battery arrays in which multiple prefabricated batteries as described above are arranged vertically along the axial direction, The present invention includes the fact that an extension of at least one prefabricated battery is bonded to and electrically connected to the upper post or side shell or side shell of a longitudinally adjacent prefabricated battery.

[0009] A preferred technical solution further provides another series of battery arrays in which a plurality of the above-described prefabricated batteries are arranged longitudinally along the axial direction of the cylindrical central extension line, The extended portion of the upper prefabricated battery extends downward to the bottom shell and is bent inward, and is bonded to the upper post of the lower prefabricated battery which is adjacent to it in the vertical direction and electrically connected, thereby forming an upper-lower series connection, or the extended portion of the lower prefabricated battery extends upward to the lower part of the side shell of the upper prefabricated battery which is adjacent to it in the vertical direction and is fixed to the side shell by a circumferential fixing portion at the bottom and electrically connected, thereby forming an upper-lower shell post parallel connection.

[0010] In a third aspect, this application relates to a plurality of prefabricated batteries as described above, arranged in an array, Alternatively, the present invention provides a battery pack including a battery array as described in any one of the above-mentioned items.

[0011] In the fourth aspect, this application is, The steps include providing at least one circumferential fixing portion, The steps include: fixing and connecting at least a portion of one side of the connection portion of the conductive strip to the inner surface of the circumferential fixing portion; The process involves providing a cylindrical single cell and fitting the circumferential fixing portion into the side shell of the cylindrical single cell, The present invention further provides a method for manufacturing a prefabricated battery as described above, which includes the step of fixing the other side of the connection part to the side shell with a conductive adhesive and connecting it electrically.

[0012] As a preferred technical solution, this application provides: The steps include arranging multiple prefabricated batteries as described above in a row in the same direction, and arranging multiple or multiple prefabricated batteries as described above in a vertical direction along the axial direction, The steps include: electrically connecting the extended portion of a prefabricated battery to the side shell and / or upper post and / or bottom shell of an adjacent prefabricated battery in the lateral or axial direction, and electrically connecting the prefabricated batteries in series and / or in parallel within the battery row; The present invention further provides a method for manufacturing a battery array, which includes the step of structurally connecting multiple prefabricated batteries.

[0013] As a preferred technical solution, this application provides: The steps include arranging multiple prefabricated batteries as described above in a single-layer or multi-layer array,

[0014] The steps include: attaching the extended portion of a prefabricated battery to the side shell and / or upper post and / or bottom shell of an adjacent prefabricated battery in the lateral or axial direction and electrically connecting them; and electrically connecting the prefabricated batteries within the battery pack in series and / or in parallel. The present invention further provides a method for manufacturing a battery pack, which includes the step of structurally connecting multiple prefabricated batteries. Compared to conventional technologies, the technical solutions used in the present invention can achieve the following beneficial effects.

[0015] This application primarily provides a prefabricated battery. The prefabricated battery consists of a cylindrical cell, a circumferential fixing part, and a conductive strip. The cylindrical cell can be selected from cylindrical cells, cylindrical prismatic cells, or polygonal prism cells, etc. The circumferential fixing part can be adapted according to the specific shape differences of the cell. Multiple conductive strips may be provided and simultaneously electrically connected to the shell post or upper post of the cylindrical cell. The conductive strip can extend outward via the circumferential fixing part and is used to connect the upper post or shell post of other prefabricated batteries. The prefabricated batteries can be directly electrically connected to each other via the conductive strip, and can form a series-connected / parallel-connected battery array or battery pack.

[0016] On the first side, the installation of circumferential fixing parts and conductive strips eliminates the need to weld busbars for electrical connections between adjacent cells within a row or pack. This simplifies the manufacturing process for electrical and structural connections between cells within a row or pack, improving production capacity and yield.

[0017] In the second aspect, the busbar is eliminated, and the circumferential fixing part and conductive strip are connected to the single cell with structural adhesive and conductive adhesive. As a result, the structure of the electrical connection point is changed from peel resistance to shear resistance, and the stability of the structural and electrical connection points can still be guaranteed even when the battery pack is in a vibrating state.

[0018] On the third side, the installation of circumferential fixing parts enables electrical isolation between adjacent cells within a row / pack, eliminating the need for additional electrical isolation members. This allows for direct insulation between adjacent cells, reducing the weight of the battery pack and simplifying the battery pack structure.

[0019] On the fourth side, by increasing the number, position, or bending direction of the conductive strips, various forms such as series connection, parallel connection, lateral electrical connection, and vertical electrical connection between single cells can be realized. Therefore, it is satisfied that the single cells are stacked in a single layer or multiple layers to form a pack.

[0020] On the fifth side, since the monitoring wire can be directly electrically connected to the prehub battery, an electrical connection between the single cell and the external monitoring circuit can be realized, eliminating the need to add other structures again.

Brief Description of the Drawings

[0022] To further clarify the object, technical solution, and advantages of the present invention, specific embodiments of the present invention and corresponding drawings are described below in a clear and complete manner. In the description of the present invention, unless otherwise specified, the term "or" is generally used to include "and / or".

[0023] In describing the present invention, unless otherwise explicitly defined and limited, the terms “attach,” “connect,” and “join” should be understood broadly. For example, they may be fixedly connected, detachably connected, integrally connected, directly connected, indirectly connected via an intermediate medium, or the internals of two elements may be connected. Those skilled in the art will understand the specific meaning of these terms in the present invention depending on the specific situation. Furthermore, in the description of this application, terms such as “first,” “second,” etc., are merely used to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0024] Naturally, the embodiments described are only a part of, not all, embodiments of the present invention. All other embodiments that a person skilled in the art could obtain without creative effort based on the embodiments of the present invention are all within the scope of the protection of the present invention.

[0025] Example 1 Referring to Figures 1-12, this embodiment provides a prefabricated battery comprising a cylindrical cell 100, a circumferential fixing portion 200, and a conductive strip 300. The circumferential fixing portion 200 can, on the one hand, achieve a stable structural connection between the conductive strip 300 and the cylindrical cell 100, and on the other hand, achieve electrical isolation between adjacent cylindrical cell 100s. Electrical and structural connections can be simultaneously achieved between adjacent prefabricated batteries via the conductive strip 300.

[0026] In one preferred embodiment, the cylindrical cell 100 can be selected from a cylindrical cell, a cylindrical rectangular cell (e.g., a rectangular cell), a polygonal prism cell (e.g., a hexagonal prism cell, e.g., Figure 6), etc. Preferably, as the cylindrical cell, a cylindrical cell having a neck 150 can be selected, although a cylindrical cell without a neck 150 may also be used. The cylindrical cell can be optionally selected from 18650 batteries, 21700 batteries, 46800 batteries, etc., but is not limited to these.

[0027] In a preferred embodiment, the cylindrical single cell 100 has a shell post and an upper post 120, the shell post is provided on the side shell 130 and the bottom shell 140, and the upper post 120 is provided in the center of the top cover 110. Those skilled in the art should understand that the upper post 120 and the shell post are two posts of the cylindrical single cell 100, respectively. There are some differences in the shape and structure of cylindrical single cells 100 of different model numbers, so they will not be listed individually in this embodiment.

[0028] Preferably, the circumferential fixing portion 200 is manufactured from a piece of material, has an inner surface that is curved to at least partially conform to the outer contour of the side shell 130, and is provided surrounded at least a portion by the side shell 130 of the cylindrical cell 100.

[0029] In one preferred embodiment, the circumferential fixing portion 200 can be arranged as a closed annular sleeve, as shown in Figure 1, and at least a portion of it is adhered to the side shell 130 of the cylindrical cell 100 with structural adhesive. In another preferred embodiment, the circumferential fixing portion 200 can also be arranged as an unclosed C-shaped sleeve, as shown in Figures 4 and 5, and more preferably, when the circumferential fixing portion 200 is arranged as a C-shaped sleeve, in order to ensure a tight connection with the cylindrical cell 100, in this case the unfolded length of the circumferential fixing portion 200 is greater than half the circumference of the side shell 130, i.e., the arc of the circumferential fixing portion 200 is at least greater than π and the arc length is greater than or equal to half the circumference of the side shell 130.

[0030] In one preferred embodiment, the circumferential fixing portion 200 is made of a transparent insulating sheet and is attached to the side shell 130 of the cylindrical cell 100 with a UV structural adhesive. After the circumferential fixing portion 200 is attached to the side shell 130 with the UV structural adhesive, the two can be tightly bonded by direct UV curing.

[0031] In another preferred embodiment, the circumferential fixing portion 200 is made of a conductive material and is attached to the side shell 130 of the cylindrical cell 100 with a quick-drying polyurea or anaerobic adhesive. If the circumferential fixing portion 200 is arranged to be a conductor, additional insulating structures, such as insulating sheets or insulating blocks, must be installed between the circumferential fixing portions 200 of adjacent prefabricated cells to achieve insulation between adjacent cylindrical cells 100.

[0032] Whether the circumferential fixing portion 200 is a conductor or an insulator, a stable connection between it and the side shell 130 is achieved with a structural adhesive, and the shear strength of the structural adhesive is significantly superior to its peel resistance. Four-point spot welding is a commonly used electrical connection method for high-temperature welding in battery packs of current automotive grades, and the shear strength provided by the large bonding area can be equal to or greater than the shear strength provided by four-point spot welding, but the peel resistance provided by the large bonding area is clearly weaker than the shear strength provided by four-point spot welding.

[0033] Furthermore, even if the circumferential fixing portion 200 is thin (0.1-0.3 mm) and made of a flexible material (PVC), its hardness and strength are significantly enhanced once the structural adhesive solidifies on its inner surface, making it an ideal structural member.

[0034] In a preferred embodiment, to accommodate cylindrical single cells 100 with diameter tolerances and to form a radial contact force on the conductive strip 300, the circumferential fixing portion 200 has a certain degree of elasticity before the structural adhesive hardens, allowing it to be taut and attached to the side shell 130, which helps reduce the contact resistance of the pressure-contacted electrical connector. Once the structural adhesive hardens, the circumferential fixing portion 200 hardens together with the structural adhesive, significantly reducing its elasticity and making it less prone to loosening due to radial tension.

[0035] In one preferred embodiment, the cylindrical single cell 100 has a neck 150, in which case the circumferential fixing portion 200 can be located in the upper region of the neck 150 of the side shell 130, as shown in Figures 7 and 8, or in the lower region of the neck 150, as shown in Figure 9, or the circumferential fixing portion 200 can be provided in both the upper and lower regions of the neck 150, as shown in Figure 10, or it can completely cover the neck 150, the upper region of the neck 150, and the lower region of the neck 150. Preferably, the circumferential fixing portion 200 can be located simultaneously in the bottom region of the side shell 130, or simply in the bottom region only.

[0036] In another preferred embodiment, the cylindrical cell 100 is a cell without a neck 150, in which case the circumferential fixing portion 200 can be located in the upper and / or lower region of the side shell 130.

[0037] Whether the cylindrical single cell 100 has a neck 150 or not, if the circumferential fixing portion 200 is provided in the upper region of the side shell 130, it is preferable that its upper surface be higher than the upper surface of the battery top cover 110 and be bent inward in the circumferential direction in order to achieve insulation from the battery top cover 110.

[0038] Whether the cylindrical single cell 100 has a neck 150 or not, the circumferential fixing portion 200 may be provided in multiple quantities, and these are defined as the first circumferential fixing portion 200, the second circumferential fixing portion 200, the third circumferential fixing portion 200, and so on.

[0039] The cylindrical single cell 100 may have a neck 150 or it may not have a neck 150. Therefore, the dimensions and thickness of the circumferential fixing part 200 can be adjusted according to the actual shape and dimensions of the cylindrical single cell 100, and specific data can be freely specified and will not be listed here one by one.

[0040] In a preferred embodiment, at least one conductive strip 300 is provided between the circumferential fixing portion 200 and the side shell 130, and the conductive strip 300 includes a connecting portion 301 and an extending portion 302. The connecting portion 301 is interposed between the circumferential fixing portion 200 and the side shell 130, and at least a portion of one side of the connecting portion 301 is fixedly connected to the inner surface of the circumferential fixing portion 200, while the other side of the connecting portion 301 is fixedly connected to the side shell 130 with a conductive adhesive and is electrically connected. As shown in Figures 2 and 3, the extending portion 302 extends away from the circumferential fixing portion 200 and / or extends by bending, and is used to connect to the upper post 120 or shell post of another prefabricated battery.

[0041] In a preferred embodiment, the extended portion 302 of the conductive strip 300 is bent outward at the position of the circumferential fixing portion 200 and is used to connect to the upper post 120 of another laterally adjacent prefabricated battery.

[0042] In another preferred embodiment, the extended portion 302 of the conductive strip 300 is bent outward at the position of the circumferential fixing portion 200 and is used for electrical connection to an external circuit.

[0043] Preferably, the conductive strip 300 and the circumferential fixing portion 200 are tightly connected with a structural adhesive, and an electrical connection is made between the conductive strip 300 and the side shell 130 with a conductive adhesive. Due to the significant circumferential fixing effect of the circumferential fixing portion 200 after curing, both the radial peel resistance and longitudinal shear strength between the circumferential fixing portion 200 and the side shell 130 are significantly strengthened. The frictional force between the circumferential fixing portion 200 and the side shell 130, the adhesive force of the structural adhesive, and the adhesive force of the conductive adhesive work together to create a stable tripartite structure in the conductive strip 300, the circumferential fixing portion 200, and the cylindrical cell 100, greatly improving the reliability of the electrical connection points.

[0044] In one preferred embodiment, in order to increase the contact area between the conductive strip 300 and the side shell 130 and improve the stability of the electrical connection point, the inner surface of the connection portion 301 of the conductive strip 300 that contacts the side shell 130, and / or the inner surface of the connected circumferential fixing portion 200, have a curved surface that conforms to the side shell 130.

[0045] In one preferred embodiment, the presence of a conductive strip 300 causes the circumferential fixing portion 200 in this area to protrude outward. Since such a protruding structure affects stability during the process of the batteries being arranged in rows or packs, two circumferential fixing portions 200 can be provided to make the structure of adjacent cylindrical single cells 100 in the battery row or battery pack more compact and stable. For example, one of the circumferential fixing portions 200 is provided at the top of the battery, and a conductive strip 300 is further provided within the circumferential fixing portion 200 provided at the top of the battery, and another circumferential fixing portion is provided at the bottom of the battery, and the circumferential fixing portion 200 provided at the bottom of the battery does not have a conductive strip 300. As shown in Figure 11, a protrusion 210 is further provided in the lower circumferential fixing portion 200 at a position corresponding to the upper conductive strip 300, and the thickness of the protrusion 210 is the same as the thickness of the conductive strip 300 of the upper circumferential fixing portion 200 that protrudes outward, and the protrusion 210 is used to contact the side shell 130 or circumferential fixing portion 200 of another prefabricated battery and to realize a stable structural connection between adjacent batteries.

[0046] In a preferred embodiment, when a neck 150 is provided on the cylindrical cell 100, the extended portion 302 of the conductive strip 300 is further provided with at least one wrinkled region, the wrinkled region having a lower elastic modulus than other regions of the extended portion 302. Preferably, the wrinkled region includes a projection 303. As shown in Figure 7-10, since the elastic modulus of the wrinkled region is small and its shape is easily altered, at least a portion of the projection 303 can be inserted into a groove in the neck 150 of the cell to increase the contact area with the side shell 130 and improve the stability of the electrical and structural connections.

[0047] Preferably, as shown in Figure 8, a circumferential fixing portion 200 may be additionally fitted outside the projection 303, which is used on the one hand to further fix the projection 303 and on the other hand to insulate it from the outside and prevent short circuits.

[0048] Example 2 Referring to Figures 12-13, this embodiment provides a prefabricated battery comprising a cylindrical single cell 100, at least one circumferential fixing portion 200, and at least one conductive strip 300, and the features relating to the cylindrical single cell 100 and circumferential fixing portion 200 already included in Embodiment 1 are naturally inherited in this embodiment.

[0049] In some preferred embodiments, the circumferential fixing portion 200 is located at the bottom of the side shell 130, and the extended portion 302 of the conductive strip 300 extends inward at the position of the bottom shell 140 to enable series electrical connection between adjacent batteries, and is used to connect to the upper post 120 of another prefabricated battery stacked axially.

[0050] Preferably, after the conductive strip 300 is bent inward at the position of the bottom shell 140, it is still electrically connected with conductive adhesive at the position where it is in direct contact with the bottom shell 140, but an insulating member 400 is provided at other positions on the bottom shell 140, see Figure 12 (the insulating member 400 is not shown in the figure for reasons of thickness), thereby ensuring that the conductive strip 300 is electrically connected only to the upper post 120 of the lower battery and is isolated from other positions, thereby ensuring the stability of the series connection.

[0051] Preferably, after the conductive strip 300 is bent inward at the position of the bottom shell 140, the upper post 120 of the lower battery is provided with an insulating member 400 except for the electrical connection point, and preferably the insulating member 400 covers the top cover 110 of the lower battery, as shown in Figure 13, ensuring that the conductive strip 300 is electrically connected only to the upper post 120 of the lower battery while being insulated from other positions, and ensuring the stability of the series connection, the dimensions of the insulating member 400 are larger than the dimensions of the top cover 110.

[0052] In another preferred embodiment, to achieve parallel electrical connection between adjacent batteries, the extension 302 of the conductive strip 300 extends upward at the position of the upper post 120 and is used to connect to the side shell 130 of another prefabricated battery located above and stacked axially.

[0053] Preferably, the lower battery is provided with a circumferential fixing portion 200 at least on the upper part of its side shell 130, and the upper battery is provided with a circumferential fixing portion 200 at least below its side shell 130.

[0054] In this embodiment, adjacent batteries located vertically can be electrically connected by at least one conductive strip 300. Preferably, the conductive strip 300 has insulating members 400 or structural adhesives at locations other than the electrical connection points, thereby avoiding electrical connection between the conductive strip 300 and the upper post 120 of the lower battery.

[0055] Example 3 Referring to Figure 14, this embodiment provides a prefabricated battery comprising a cylindrical single cell 100, at least one circumferential fixing portion 200, and at least one conductive strip 300, and the features relating to the cylindrical single cell 100 and circumferential fixing portion 200 already included in Embodiment 1 are naturally inherited in this embodiment.

[0056] Preferably, the prefabricated battery includes a first conductive strip 310 and a second conductive strip 320, wherein at least a portion of one side of the connection portion 301 of the first conductive strip 310 is fixedly connected to a first position on the inner surface of the circumferential fixing portion 200, and at least a portion of one side of the connection portion 301 of the second conductive strip 320 is fixedly connected to a second position on the inner surface of the circumferential fixing portion 200 that is different from the first position.

[0057] In one preferred embodiment, the extended portion 302 of the first conductive strip 310 extends along the side shell 130 to the upper post 120, or extends in the direction of the bottom shell 140.

[0058] In another preferred embodiment, the extension 302 of the first conductive strip 310 is bent at the upper post 120 and extends away from the cylindrical single cell 100, and is used to connect the upper posts 120 of adjacent prefabricated cells.

[0059] Preferably, as shown in Figure 14, the extended portion 302 of the first conductive strip 310 is bent outward and extended, used to connect to the upper post 120 of another laterally adjacent prefabricated battery, and the extended portion 302 of the second conductive strip 320 is folded in half at the edge of the circumferential fixing portion 200 and provided on the outer surface of the circumferential fixing portion 200. In this case, since the first conductive strip 310 is connected to the upper post 120 and shell post of two adjacent prefabricated batteries, a series electrical connection between adjacent prefabricated batteries can be achieved. The second conductive strip 320 can achieve a parallel electrical connection between adjacent prefabricated batteries or an electrical connection with an external monitoring circuit.

[0060] Preferably, the extended portion 302 of the first conductive strip 310 is bent outward and extended, and is used to connect to the upper post 120 of another laterally adjacent prefabricated battery, and the extended portion 302 of the second conductive strip 320 is bent outward and extended at the edge of the circumferential fixing portion 200. In this case, either the first conductive strip 310 or the second conductive strip 320 can realize a series electrical connection between adjacent prefabricated batteries, and the other conductive strip 300 can realize an electrical connection with an external monitoring circuit.

[0061] Example 4 Referring to Figure 15, this embodiment provides a prefabricated battery comprising a cylindrical single cell 100, at least one circumferential fixing portion 200, and at least one conductive strip 300, and the features relating to the cylindrical single cell 100 and circumferential fixing portion 200 already included in Embodiment 1 are naturally inherited in this embodiment. In one preferred embodiment, the prefabricated battery includes a first conductive strip 310, a second conductive strip 320, and a third conductive strip 330.

[0062] Preferably, at least a portion of one side of the connection portion 301 of the first conductive strip 310 is fixed and connected to a first position on the inner surface of the circumferential fixing portion 200, and the extended portion 302 of the first conductive strip 310 is bent in a direction and extends away from the cylindrical single cell 100, and is used to connect the upper posts 120 of adjacent prefabricated batteries. In this case, the first conductive strip 310 can realize a series electrical connection between adjacent prefabricated batteries.

[0063] Preferably, at least a portion of one side of the connection portion 301 of the second conductive strip 320 is fixedly connected to a second position on the inner surface of the circumferential fixing portion 200 that is different from the first position, and at least a portion of one side of the connection portion 301 of the third conductive strip 330 is fixedly connected to a third position on the inner surface of the circumferential fixing portion 200 that is different from the first and second positions.

[0064] Preferably, the extended portion 302 of the second conductive strip 320 is folded in half at the edge of the circumferential fixing portion 200 and is provided on the outer surface of the circumferential fixing portion 200, and is used to electrically connect to the side shell 130 of the prefabricated battery or a parallel electrical connection member adjacent to the second position.

[0065] Preferably, the extended portion 302 of the third conductive strip 330 is bent at the edge of the circumferential fixing portion 200 in a direction away from the cylindrical single cell 100 and is used to electrically connect to an access point of an external circuit adjacent to the third position, or the extended portion 302 of the third conductive strip 330 is folded in half at the edge of the circumferential fixing portion 200 and is provided on the outer surface of the circumferential fixing portion 200 and is used to electrically connect to the side shell 130 or parallel electrical connection member of a prefabricated cell adjacent to the third position.

[0066] Example 5 Referring to Figure 16, this embodiment provides a battery array comprising several electrically connected prefabricated batteries, and features relating to prefabricated batteries already included in any one of the embodiments of Examples 1-4 above are naturally inherited in this embodiment.

[0067] In a preferred embodiment, a plurality of prefabricated batteries are arranged in rows in the same direction horizontally, and in each prefabricated battery, the extended portion 302 of at least one conductive strip 300 is folded in half at the edge of the circumferential fixing portion 200 and is provided on the outer surface of the circumferential fixing portion 200. The extended portion 302 of the conductive strip 300 of each prefabricated battery is bonded to the side shell 130 of an adjacent prefabricated battery and electrically connected, or the extended portion 302 of each prefabricated battery is bonded to the extended portion 302 of an adjacent prefabricated battery and electrically connected, forming a battery row in which shell posts are connected in parallel. Preferably, in the above-mentioned parallel-connected battery array, the electrical connection points are structurally conductively connected using a conductive adhesive.

[0068] In one preferred embodiment, the conductive strip 300 may be arranged in a curved shape that conforms to the outer surface of the circumferential fixing portion 200. As a result, even though the conductive strips 300 of the two connected prefabricated batteries are electrically connected with a conductive adhesive, gaps may still exist at other locations. By using a structural adhesive to connect the gaps and create an insulating structure, structural stability at the electrical connection points can be improved, while short circuits between the batteries due to electrical connections between the conductive strip 300 and other locations other than the electrical connection points can be prevented.

[0069] Preferably, the conductive strip 300 is further provided with a bent section 304, which is located in the middle of the conductive strip 300 between two adjacent batteries and is bent downward. The bent section 304 can provide some cushioning when the battery row vibrates and can ensure the stability of the electrical connection.

[0070] Example 6 Referring to Figure 17, this embodiment provides a battery array comprising several electrically connected prefabricated batteries, and features relating to the prefabricated batteries already included in any one of the embodiments of Examples 1-4 above are naturally inherited in this embodiment.

[0071] In a preferred embodiment, the multiple prefabricated batteries are arranged in a row in the same direction horizontally, and in the prefabricated batteries, the extended portion 302 of at least one conductive strip 300 is bent outward and extends away from the cylindrical single cell 100. Preferably, the upper post 120 of the leading prefabricated battery is the outer upper post 120 of the battery row, and the side shell 130 or bottom shell 140 or conductive strip 300 of the last prefabricated battery is the outer shell post of the battery row.

[0072] Except for the last prefabricated battery, the extended portion 302 of the conductive strip 300 of each prefabricated battery is sequentially attached to the upper post 120 of the adjacent prefabricated battery and electrically connected, forming a series battery array. Preferably, in the series-connected battery array described above, a structural conductive connection is made at the electrical connection points using a conductive adhesive.

[0073] Example 7 Referring to Figure 12, this embodiment provides a longitudinal battery array comprising several electrically connected prefabricated batteries, and features relating to the prefabricated batteries already included in any one of the above embodiments 1-4 are naturally inherited in this embodiment.

[0074] Preferably, the multiple prefabricated batteries are arranged vertically along the axial direction, and the extended portion 302 of the conductive strip 300 of at least one prefabricated battery is bonded to and electrically connected to the upper post 120 of a vertically adjacent prefabricated battery.

[0075] In a preferred embodiment, a plurality of prefabricated batteries are arranged in rows in the same direction vertically. In the prefabricated batteries, the extended portion 302 of at least one conductive strip 300 is bent outward and extends away from the cylindrical single cell 100. A series electrical connection is established between vertically adjacent prefabricated batteries in the vertical battery row via the bent conductive strip 300.

[0076] Preferably, the upper prefabricated battery is electrically connected to the upper post 120 of the lower prefabricated battery through its folded conductive strip 300 and conductive adhesive. Insulated connections are achieved using insulating material 400 or structural adhesive at points other than the electrical connection points.

[0077] Example 8 Referring to Figure 18, this embodiment provides a longitudinal battery array including several electrically connected prefabricated batteries, and features relating to the prefabricated batteries already included in any one of the above embodiments 1-4 are naturally inherited in this embodiment.

[0078] Preferably, the multiple prefabricated batteries are arranged vertically along the axial direction, and the extended portion 302 of the conductive strip 300 of at least one prefabricated battery is bonded to and electrically connected to the side shell 130 of a vertically adjacent prefabricated battery.

[0079] In a preferred embodiment, a plurality of prefabricated batteries are arranged in a row in the same direction vertically. In each prefabricated battery, an extension 302 of at least one conductive strip 300 extends upward. Parallel electrical connections between shell posts in the row are achieved between vertically adjacent prefabricated batteries via the conductive strip 300.

[0080] Preferably, the same conductive strip 300 enables parallel electrical connection between two longitudinally adjacent prefabricated batteries, and the conductive strip 300 enables a stable structural connection between two upper and lower prefabricated batteries through two circumferential fixing portions 200.

[0081] Preferably, the lower prefabricated battery is electrically connected to the shell post of the upper prefabricated battery by its conductive strip 300 and conductive adhesive, and insulating connections are achieved using insulating material 400 or structural adhesive at points other than the electrical connection points.

[0082] Example 9 Referring to Figure 19, this embodiment provides a battery pack comprising several prefabricated batteries arranged in an array, or multiple battery rows, and features relating to prefabricated batteries already included in any one of the embodiments 1-4 above, or features relating to battery rows already included in any one of the embodiments 5-8 above, are naturally inherited in this embodiment.

[0083] In one preferred embodiment, the battery pack is obtained by electrically connecting several prefabricated batteries arranged in a horizontal array in series and parallel, and in another preferred embodiment, the battery pack is obtained by electrically connecting several rows of batteries arranged horizontally in series or parallel.

[0084] In one preferred embodiment, the battery pack is obtained by electrically connecting several prefabricated batteries arranged in the longitudinal direction in series and / or parallel, and in another preferred embodiment, the battery pack is obtained by electrically connecting several longitudinal battery rows arranged in the longitudinal direction in series or parallel.

[0085] Preferably, if the battery pack is obtained by electrically connecting multiple prefabricated batteries in the longitudinal direction, long fasteners are further provided between adjacent prefabricated batteries to ensure the stability of the battery pack, and the long fasteners are fixed and connected to the side shells 130 and / or circumferential fixing portions 200 of at least two layers of prefabricated batteries.

[0086] Example 10 Referring to Figures 20-21, this embodiment provides a battery pack including several prefabricated batteries arranged in an array, or multiple battery rows, and features relating to prefabricated batteries already included in any one of the embodiments 1-4 above, or features relating to battery rows already included in any one of the embodiments 5-8 above, are naturally inherited in this embodiment.

[0087] In one preferred embodiment, an electrical isolation section 500 is provided in the gap between the circumferential fixing sections 200 of adjacent prefabricated batteries connected in series, or in the gap between the side shells 130 of adjacent prefabricated batteries. The electrical isolation section 500 is provided corresponding to the gap or through a plurality of gaps. The electrical isolation section 500 includes a vertically provided insulating sheet.

[0088] Preferably, the insulating sheet is provided so as to penetrate multiple gaps and has a common confluence passage interposed inside. The common confluence passage includes extended portions of multiple second conductive strips 320 corresponding to each one-sided side shell 130 extending from the insulating sheet, and the connecting portions corresponding to the extended portions are provided interposed within the circumferential fixing portion 200. For specifics regarding the common confluence passage, see Japanese Patent 202210321110.2.

[0089] Preferably, a structural adhesive is provided in the gap between the circumferential fixing portions 200 of adjacent prefabricated batteries, or in the gap between the side shells 130 of adjacent prefabricated batteries, or between the circumferential fixing portions 200 and / or side shells 130 of adjacent prefabricated batteries and the isolation portion.

[0090] In one preferred embodiment, a horizontal fixing portion 600 is provided in the upper shell and gap of an adjacent prefabricated battery, and / or in the bottom shell 140 and gap of an adjacent prefabricated battery, and / or in the groove of the neck 150 of an adjacent prefabricated battery. Preferably, the horizontal fixing portion 600 is also manufactured using insulating material and is structurally connected to the electrical isolation portion 500 in an insulated manner. In one preferred embodiment, a fastening material is further provided on the outer circumference of the battery pack.

[0091] Example 11 This embodiment provides a method for manufacturing a prefabricated battery, and any features relating to a prefabricated battery already included in any one of the above embodiments 1-4 are naturally inherited in this embodiment. In one preferred embodiment, the manufacturing method is: Step S110 provides at least one circumferential fixing portion 200, Step S120 involves fixing and connecting at least a portion of one side of the connection portion 301 of the conductive strip 300 to the inner surface of the circumferential fixing portion 200, A cylindrical single cell 100 is provided, and a step S130 is performed to fit the circumferential fixing part 200 into the side shell 130 of the cylindrical single cell 100, The process includes step S140, which involves fixing the other side of the connection portion 301 to the side shell 130 with a conductive adhesive and simultaneously connecting them electrically.

[0092] Preferably, the circumferential fixing portion 200 is manufactured from a transparent material, and the circumferential fixing portion 200 and the side shell 130 of the cylindrical cell 100, and the circumferential fixing portion 200 and the conductive strip 300 are connected with UV structural adhesive. That is, the UV structural adhesive between the circumferential fixing portion 200 and the conductive strip 300 is cured with ultraviolet light, and then the cylindrical cell 100 and both, after being fixed and connected, are cured with ultraviolet light.

[0093] Example 12 This embodiment provides a method for manufacturing a battery array, and any features relating to a prefabricated battery already included in any one of the above embodiments 1-4, or any features relating to a battery array already included in any one of the above embodiments 5-8, are naturally inherited in this embodiment. In one preferred embodiment, the manufacturing method is: Step S210 involves arranging multiple prefabricated batteries in a row in the same direction, or arranging multiple prefabricated batteries vertically along the axial direction,

[0094] Step S220 involves electrically connecting the extended portion 302 of a prefabricated battery to the side shell 130 and / or upper post 120 and / or bottom shell 140 of an adjacent prefabricated battery in the lateral or axial direction, thereby electrically connecting the prefabricated batteries in the battery row in series and / or in parallel. The method includes step S230, which involves structurally connecting a plurality of the aforementioned prefabricated batteries.

[0095] Preferably, electrical connections are made at electrical connection points within the battery array using a conductive adhesive, and the conductive strip 300 is insulated from other parts of the cylindrical cell 100 by an insulating structural adhesive or insulating member 400, except at the electrical connection points.

[0096] Example 13 This embodiment provides a method for manufacturing a battery pack, and features relating to a prefabricated battery already included in any one of Examples 1-4, or features relating to a battery array already included in any one of Examples 5-8, or features relating to a battery pack already included in Example 9 or 10 are naturally inherited in this embodiment. In one preferred embodiment, the manufacturing method is: Step S310 involves arranging multiple prefabricated batteries in a single-layer or multi-layer array,

[0097] Step S320 involves electrically connecting the extended portion 302 of a prefabricated battery to the side shell 130 and / or upper post 120 and / or bottom shell 140 of an adjacent prefabricated battery in the lateral or axial direction, thereby electrically connecting the prefabricated batteries within the battery pack in series and / or in parallel. The process includes step S330, which involves structurally connecting multiple prefabricated batteries.

[0098] Preferably, electrical connections are made at electrical connection points within the battery pack using a conductive adhesive, and the conductive strip 300 is insulated from other parts of the cylindrical cell 100 by an insulating structural adhesive or insulating member 400, except for the electrical connection points.

[0099] Although embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely schematic and not intended to limit the invention. There are many possible forms that can be made by those skilled in the art without departing from the spirit and scope protected by the claims of the present invention, all of which fall within the protection of the present invention. [Explanation of symbols]

[0100] Cylindrical single cell 100, top cover 110, upper post 120, side shell 130, bottom shell 140, neck 150; circumferential fixing part 200, protrusion 210; conductive strip 300, first conductive strip 310, second conductive strip 320, third conductive strip 330, connecting part 301, extended part 302, projection 303, bent section 304; insulating member 400; electrically isolated part 500, horizontal fixing part 600

Claims

1. A cylindrical single cell having a shell post including a side shell and a bottom shell, and an upper post, Manufactured from a flake material, at least one circumferential fixing portion is provided around the side shell of the cylindrical single cell, At least one conductive strip comprising a connecting portion and an extending portion, wherein the connecting portion is provided interposed between the circumferential fixing portion and the side shell, at least a portion of one side of the connecting portion is fixedly connected to the inner surface of the circumferential fixing portion, the other side of the connecting portion is fixedly connected to the side shell with a conductive adhesive and electrically connected, and the extending portion extends in a direction away from the circumferential fixing portion and / or extends by bending, and is used for connection to the upper post or shell post of another prefabricated battery, including, A prefabricated battery characterized by the following features.

2. The extended portion of the conductive strip is bent inward at the position of the bottom shell and is used to connect to the upper post of another prefabricated battery stacked in the axial direction. Alternatively, the extended portion of the conductive strip extends upward at the position of the upper post and is used to connect to the side shell of another prefabricated battery located above it in an axially stacked manner. Alternatively, the extended portion of the conductive strip is bent outward at the position of the circumferential fixing portion and is used to connect the upper posts of other prefabricated batteries stacked laterally. Alternatively, the extended portion of the conductive strip is bent outward at the position of the circumferential fixing portion and is used for electrical connection to an external circuit. The prefabricated battery according to feature 1.

3. The at least one circumferential fixing portion includes a first circumferential fixing portion, the at least one conductive strip includes a first conductive strip and a second conductive strip, at least a portion of one side of the connection portion of the first conductive strip is fixedly connected to a first position on the inner surface of the first circumferential fixing portion, and at least a portion of one side of the connection portion of the second conductive strip is fixedly connected to a second position on the inner surface of the first circumferential fixing portion that is different from the first position. The prefabricated battery according to feature 1.

4. The extended portion of the first conductive strip extends along the side shell toward the upper post or bottom shell. The prefabricated battery according to feature 3.

5. The extended portion of the first conductive strip is bent at the position of the upper post and extends away from the cylindrical single cell, and is used to connect to the upper post of an adjacent prefabricated cell. The prefabricated battery according to feature 3.

6. The extended portion of the first conductive strip extends inward at the position of the bottom shell and is used to connect to the upper post of another lower prefabricated battery stacked axially, and the extended portion of the second conductive strip is folded in half at the edge of the first circumferential fixing portion and is provided on the outer surface of the first circumferential fixing portion. The prefabricated battery according to feature 3.

7. The extended portion of the first conductive strip extends outward, folded in half, and is used to connect to the upper post of another prefabricated battery stacked laterally, and the extended portion of the second conductive strip extends outward, folded in half, at the edge of the first circumferential fixing portion. The prefabricated battery according to feature 3.

8. The at least one circumferential fixing portion includes a first circumferential fixing portion, and the conductive strip includes a first conductive strip, a second conductive strip, and a third conductive strip. At least a portion of one side of the connection portion of the first conductive strip is fixedly connected to a first position on the inner surface of the first circumferential fixing portion, and the extended portion of the first conductive strip is bent at the position of the upper post and extends away from the cylindrical cell, and is used to connect to the upper post of an adjacent prefabricated cell. At least a portion of one side of the connection portion of the second conductive strip is fixedly connected to a second position different from the first position on the inner surface of the first circumferential fixing portion, and at least a portion of one side of the connection portion of the third conductive strip is fixedly connected to a third position different from the first and second positions on the inner surface of the first circumferential fixing portion, and the extended portion of the second conductive strip is folded in half at the edge of the first circumferential fixing portion and provided on the outer surface of the first circumferential fixing portion, and is used to electrically connect to the side shell or parallel electrical connection member of the prefabricated battery adjacent to the second position. The extended portion of the third conductive strip is bent at the edge of the first circumferential fixing portion in a direction away from the cylindrical single cell and is used to electrically connect to an access point of an external circuit adjacent to the third position, or the extended portion of the third conductive strip is folded in half at the edge of the first circumferential fixing portion and is provided on the outer surface of the first circumferential fixing portion and is used to electrically connect to the side shell or parallel electrical connection member of a prefabricated battery adjacent to the third position. The prefabricated battery according to feature 1.

9. The extended portion further includes at least one folded section. The prefabricated battery according to feature 1.

10. The extended portion has a wrinkled region, and the elastic modulus of the wrinkled region is lower than that of other regions of the extended portion. The prefabricated battery according to feature 1.

11. The wrinkled region includes a projection, at least a portion of which is inserted into a groove in the neck of the cylindrical single cell. The prefabricated battery according to feature 10.

12. The circumferential fixing portion is a closed-loop annular sleeve or an open-loop C-shaped sleeve. The unfolded length of the circumferential fixing portion is greater than half the circumference of the side shell. A prefabricated battery according to any one of claims 1 to 10.

13. The at least one circumferential fixing portion further includes a second circumferential fixing portion. A prefabricated battery according to any one of claims 1 to 10.

14. A structural adhesive is provided in at least a portion of the area between the circumferential fixing portion and the side shell. A prefabricated battery according to any one of claims 1 to 9.

15. The circumferential fixing portion is provided in the upper and / or lower neck region of the cylindrical single cell, and / or covers the upper region of the side shell including the neck. A prefabricated battery according to any one of claims 1 to 10.

16. The outer surface of the circumferential fixing portion has at least one protrusion for contacting the side shell or circumferential fixing portion of another prefabricated battery, The circumferential fixing portion is an insulating sheet or a conductive strip, and the structural adhesive is a fast-drying polyurea or anaerobic adhesive. Or, The circumferential fixing portion is a transparent insulating sheet, and the structural adhesive is a UV adhesive, a quick-drying polyurea, or an anaerobic adhesive. The prefabricated battery according to feature 14.

17. The cylindrical single cell is either a cylindrical single cell or a polygonal prism-shaped single cell. A prefabricated battery according to any one of claims 1 to 10.

18. The inner surface of the circumferential fixing portion that contacts the side shell has a curved surface that conforms to the side shell, and / or the inner surface of the connecting portion that contacts the side shell and / or the inner surface of the connected circumferential fixing portion has a curved surface that conforms to the side shell. A prefabricated battery according to any one of claims 1 to 10.

19. A battery array, Multiple prefabricated batteries according to claim 1 are arranged in a row, The upper post of the leading prefabricated battery is the outer upper post of the battery row, and the side shell or bottom shell or conductive strip of the last prefabricated battery is the outer shell post of the battery row. Except for the last prefabricated battery, the extended portion of the conductive strip of each prefabricated battery is sequentially attached to the upper post of the adjacent prefabricated battery and electrically connected, thereby forming a series battery array. A battery array characterized by the following:

20. Multiple prefabricated batteries according to claim 1 are arranged in rows in the same direction, The extended portion of the conductive strip of each prefabricated battery is bonded to the side shell of an adjacent prefabricated battery and electrically connected, or the extended portion of each prefabricated battery is bonded to the extended portion of an adjacent prefabricated battery and electrically connected, forming a battery array in which shell posts are connected in parallel. A battery array characterized by the following:

21. The plurality of prefabricated batteries described in claim 1 are arranged vertically along the axial direction, The extension of at least one of the prefabricated batteries is electrically connected to the upper post or side shell or side shell of a longitudinally adjacent prefabricated battery, A series of batteries arranged in a vertical configuration, characterized by the above.

22. Multiple prefabricated batteries according to claim 1 are arranged in the longitudinal direction along the axial direction of the cylindrical central extension line, The extended portion of the upper prefabricated battery extends downward to the bottom shell and is bent inward, and is bonded to and electrically connected to the upper post of the lower prefabricated battery that is vertically adjacent, forming an upper-lower series connection, or the extended portion of the lower prefabricated battery extends upward to the lower part of the side shell of the upper prefabricated battery that is vertically adjacent, and is fixed and connected to the side shell by a circumferential fixing portion at the lower part, and is electrically connected, forming a parallel connection of upper and lower shell posts, A series of batteries arranged in a vertical configuration, characterized by the above.

23. A plurality of prefabricated batteries according to claim 1 arranged in an array, Or, including a battery array according to one of the claims 19 or 20, A battery pack characterized by the following features.

24. Includes a plurality of cascaded battery rows according to claim 21 or 22 arranged in an array, A battery pack characterized by the following features.

25. The present invention further includes at least one long fastening member provided between the prefabricated batteries, the long fastening member being fixed and connected to at least two layers of the side shells and / or the circumferential fixing portion of the prefabricated batteries. The battery pack according to feature 24.

26. An electrical isolation portion is provided in the gap between the circumferential fixing portions of adjacent prefabricated batteries connected in series, or in the gap between the side shells of adjacent prefabricated batteries, wherein the electrical isolation portion is provided corresponding to the gap, or is provided to penetrate a plurality of the gaps. The aforementioned electrical isolation section includes an insulating sheet. The battery pack according to feature 24.

27. The insulating sheet is provided so as to penetrate the plurality of gaps and has a common confluence passage interposed inside it, the common confluence passage includes the extended portions of a plurality of second conductive strips corresponding to one side shell extending from the insulating sheet, and the connecting portions corresponding to the extended portions are provided interposed within the circumferential fixing portion. The battery pack according to feature 26.

28. In the gap between the circumferential fixing portions of adjacent prefabricated batteries, or in the gap between the side shells of adjacent prefabricated batteries, or between the circumferential fixing portions and / or the side shells of adjacent prefabricated batteries and the electrical isolation portion, a structural adhesive is provided. The battery pack according to feature 26.

29. In the upper shell and gap of an adjacent prefabricated battery, and / or in the lower shell and gap of an adjacent prefabricated battery, and / or in the groove of the neck of an adjacent prefabricated battery, a horizontal fixing portion is provided. The battery pack according to feature 24.

30. The battery pack further includes fastening material provided on its outer circumference. The battery pack according to feature 24.

31. A method for manufacturing a prefabricated battery according to any one of claims 1 to 10, The aforementioned manufacturing method is The steps include providing at least one circumferential fixing portion, The steps include: fixing and connecting at least a portion of one side of the connection portion of the conductive strip to the inner surface of the circumferential fixing portion; The steps include providing a cylindrical single cell and fitting the circumferential fixing portion into the side shell of the cylindrical single cell, The step includes fixing the other side of the connection portion to the side shell with a conductive adhesive and connecting it electrically, A method for manufacturing a prefabricated battery, characterized by the following features.

32. A method for manufacturing a battery train, The steps of arranging the prefabricated batteries according to any one of the multiple claims 1 to 10 in a row in the same direction, or arranging the prefabricated batteries according to any one of the multiple claims 1 to 10 in a vertical direction along the axial direction, The steps include: attaching the extended portion of the prefabricated battery to the side shell and / or upper post and / or bottom shell of an adjacent prefabricated battery in the lateral or axial direction and electrically connecting them, electrically connecting the prefabricated batteries in series and / or in parallel within the battery row; The step of structurally connecting a plurality of the aforementioned prefabricated batteries, A method for manufacturing a battery train, characterized by the following:

33. A method for manufacturing a battery pack, The steps of arranging the prefabricated batteries according to any one of the multiple claims 1-10 in a single-layer or multi-layer array, The steps include: attaching the extended portion of the prefabricated battery to the side shell and / or upper post and / or bottom shell of an adjacent prefabricated battery in the lateral or axial direction and electrically connecting them, electrically connecting the prefabricated batteries within the battery pack in series and / or in parallel; The steps include structurally connecting a plurality of the aforementioned prefabricated batteries, A method for manufacturing a battery pack characterized by the following:

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