A connection structure of large-capacity single batteries in series

Abstract

The application belongs to the technical field of batteries, and particularly relates to a connection structure of large-capacity single batteries in series, that is, a positive current collecting column and a negative current collecting column are arranged on two sides of a single battery, and the positive current collecting column of one single battery is connected in series with the negative current collecting column of an adjacent single battery through a connecting assembly. The clamps are fastened through two corresponding grooves on adjacent batteries, so that a plurality of large-capacity batteries are connected in series through a plurality of clamps and grooves. In this series connection mode, on one hand, the connection between large-capacity single batteries through wires is omitted, and materials are saved; on the other hand, the positive and negative current collecting columns between two batteries are directly connected, the contact area is large, and the heating of the connecting wires between the batteries is reduced.

Description

Technical Field

[0001] This invention relates to the field of batteries, and more particularly to a connection method for a high-capacity lithium-ion single cell battery. Background Technology

[0002] High-capacity lithium batteries represent one of the future directions of lithium battery development, with applications in energy storage and power batteries. Because high-capacity individual cells have lower voltages but higher currents, multiple cells are typically connected in series in practical applications. Current series connection methods usually involve connecting the positive and negative terminals of individual cells with wires and securing them together with connectors to prevent instability caused by cell movement. However, this often results in larger connector cross-sectional areas, consuming more space and increasing costs, thus reducing widespread adoption.

[0003] Currently, patent CN 111341985 A discloses a battery system that connects multiple batteries in series via a battery cover. The battery cover includes a negative terminal lead, an end plate, and a positive terminal lead, which are electrically connected in sequence. The negative and positive terminals can be connected to the end plate by welding, riveting, or direct connection using injection-molded parts. However, once connected as a single unit by welding, riveting, or injection molding, it cannot be easily disassembled, resulting in poor flexibility and limited use.

[0004] CN209729981U discloses a fast series-connected lithium battery pack, which mainly consists of pads that are movably inserted between the lithium batteries. A first screw is inserted into the right end of the pad via a bearing. The first screw is threaded through and inserted into the right side wall of the device housing. A cover plate is connected to the upper left side of the device housing via a shaft. Threaded insertion holes are opened on both the front and rear sides of the cover plate's inner cavity. Second screws are threaded into the interior of each threaded insertion hole. Rotary bearings are equidistantly sleeved on each of the second screws, and a connecting rod is fixedly connected to the lower end of each rotary bearing. The series connection of the batteries is achieved through the cooperation of the first and second screws and the contact rod. However, this method suffers from installation difficulties, particularly regarding the alignment of the contact rods, which affects installation efficiency.

[0005] Therefore, there is an urgent need for a connection method that can quickly and efficiently complete the series installation of battery packs, thereby achieving safe and stable series connection of large-capacity batteries. Summary of the Invention

[0006] To address the connection issue when using large-capacity single-cell batteries in a group, this application discloses a series connection structure for large-capacity single-cell batteries. The technical solution adopted in this application is as follows:

[0007] A high-capacity single-cell battery series connection structure is provided, in which a positive current collector and a negative current collector are provided on both sides of the single-cell battery, and the positive current collector of one single-cell battery is connected in series with the negative current collector of the adjacent single-cell battery through a connecting component to realize a high-capacity combination of single-cell batteries.

[0008] Further specified, the positive current collector and the negative current collector are provided with grooves and / or through holes, one end of the connecting component extends into the groove and / or through hole of a single cell, and the other end extends into the groove and / or through hole of an adjacent single cell, and the series connection is completed by using simple connecting structures such as grooves or through holes.

[0009] Further specifying, the connecting component includes a clamping fixture, which is a U-shaped structure. The ends of the two arms of the clamping fixture extend into the positive current collector and negative current collector corresponding to two adjacent single cells, respectively, to clamp the two adjacent single cells.

[0010] Further specifying, the clamping fixture is a strip-shaped U-shaped fixture, and the positive and negative current collectors of the single cell are provided with strip-shaped grooves that match the clamping fixture. The two arms of the clamping fixture extend into the strip-shaped grooves of the positive and negative current collectors corresponding to two adjacent single cells. The two single cells are connected in series using a simple U-shaped structure, which is convenient for operation.

[0011] Furthermore, the clamping fixture also includes a first L-shaped arm, a second L-shaped arm, a fixing pin, and fastening bolts. The fixing pin is located at the bend of the second L-shaped arm, and the first L-shaped arm and the second L-shaped arm are hinged together by the fixing pin. The short arms of the first L-shaped arm and the short arms of the second L-shaped arm are stacked and connected by fastening bolts. The entire clamping fixture can be tightened by tightening the fastening bolts. The operation is simple and the clamping effect is good.

[0012] Furthermore, the connecting assembly also includes a connecting screw and a connecting nut. One end of the connecting screw is located in the groove on the positive current collector of the single cell, and the other end of the connecting screw extends to the groove corresponding to the negative current collector of the adjacent single cell. Both ends of the connecting screw are fastened by nuts located in the grooves of the single cells. The series connection of the batteries can be completed using simple standard connectors.

[0013] Further specifying, the connecting assembly includes a locking screw, a locking nut, and a connecting clamp. The two ends of the connecting clamp extend into the positive current collector and negative current collector corresponding to two adjacent single cells, respectively. The locking screw extends from one end of the connecting clamp to the other end, and the locking nut is located at both ends of the locking screw and outside the connecting clamp. The two single cells are combined by the connecting clamp and further reinforced by the locking screw and locking nut to ensure the clamping effect of the connecting clamp.

[0014] Further specified, the connecting clamp has a U-shaped structure, with the ends of the two arms of the connecting clamp extending into the positive and negative current collectors corresponding to the two adjacent single cells, respectively; screw holes are correspondingly opened on the two arms of the connecting clamp near the bottom of the U-shape, and the two ends of the locking screw extend through the screw holes on both sides to the outside of the connecting clamp, thereby connecting and combining the two single cells in series using a clamping principle similar to tweezers, which is convenient to operate and has good stability after clamping.

[0015] Furthermore, the positive and negative current collectors of the two adjacent single cells are connected and attached to each other with an embedded groove. A heat pipe or heat sink is embedded in the embedded groove, which connects the current collector and the heat transfer component, saving installation space and greatly improving heat transfer efficiency.

[0016] Further specified, one end of the heat pipe or heat exchanger is bent into an L-shape, and the end bent to the horizontal portion is connected to the semiconductor cooling chip.

[0017] Furthermore, the positive and negative current collectors have rectangular cross-sections, and one end of each current collector is bent.

[0018] Furthermore, the bent ends of the positive current collector and the negative current collector are connected to the semiconductor cooling chip.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. Connecting components are used to connect two adjacent individual cells in series to meet practical usage requirements. At the same time, connecting two adjacent individual cells in series ensures the stability of the structure of multiple individual cells in series without shaking, thus ensuring the stability and safety of the individual cell series connection. It also eliminates the need for wires to connect large-capacity individual cells, saving materials. Directly connecting the positive and negative current collectors between two cells results in a larger contact area and reduces the heat generated by the connection between cells.

[0021] 2. The positive and negative current collectors are used to make contact connections between the positive and negative electrodes of individual batteries, which improves the stability of series connection between individual batteries. Then, the adjacent positive and negative current collectors are fastened together by clamping fixtures alone or in combination with screws, nuts or connecting fixtures, thereby firmly connecting two adjacent individual batteries. The connection is convenient, the structure is stable and occupies little space.

[0022] 3. This application adopts a connection method of nut and screw, which is simple in structure, low in cost, reduces the cost of use, and can ensure that the connection between adjacent single cells is stable and reliable.

[0023] 4. The connection component of this application adopts a U-shaped clamping fixture to realize the connection between adjacent single cells, which improves the ease of connection between single cells, improves the efficiency of single cell disassembly, assembly and maintenance, saves time, and makes no-damage contact with the outer surface of the battery current collector column, without affecting the function of the current collector column itself. The operation is simple and convenient, and improves work efficiency.

[0024] 5. This application can also use the cooperation between the connecting clamp and the snap-fit ​​hole to ensure the stable connection of multiple individual batteries. At the same time, in order to avoid the loosening of the connecting clamp and the unstable connection of individual batteries, the opening distance of the connecting clamp adjustment end is adjusted by adjusting the clamp adjustment component to adjust the stability of the connection of the connecting clamp snap-fit ​​end to the adjacent individual batteries. The adjustment method is simple and quick, the operation is easy, saves disassembly and assembly time, improves work efficiency, and has a simple structure and low cost.

[0025] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the series connection of a large-capacity single cell in Example 1;

[0028] Figure 2 This is a schematic diagram of the connection components in Example 1;

[0029] Figure 3 This is a top view of the series connection of a large-capacity single cell in Example 1;

[0030] Figure 4 This is a schematic diagram of the thermal control structure in Example 2;

[0031] Figure 5 This is a schematic diagram of the series connection of a large-capacity single cell in Example 3;

[0032] Figure 6 This is a schematic diagram of a large-capacity single-cell battery in Example 3;

[0033] Figure 7 This is a schematic diagram of the series connection of a large-capacity single cell in Example 4;

[0034] Figure 8 This is a schematic diagram of the connection components in Example 4;

[0035] Figure 9 This is a schematic diagram of the series connection of a large-capacity single cell in Example 5;

[0036] Figure 10 This is a schematic diagram of the connection components in Example 5.

[0037] In the diagram: 1-Single cell, 11-Positive current collector, 12-Negative current collector, 13-Groove, 14-Through hole, 15-Embedding slot, 2-Connecting assembly, 21-First L-shaped arm, 22-Second L-shaped arm, 23-Fixing pin, 24-Fasting bolt, 25-Connecting screw, 26-Connecting nut, 27-Connecting clamp, 3-Heat radiator, 4-Semiconductor cooler. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0039] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not imply the presence or addition of one or more other elements or combinations thereof.

[0040] It should be understood that directional terms such as "upper" and "lower" used herein are used in accordance with the accompanying drawings to facilitate a better understanding of the technical solution of the present invention.

[0041] This application mainly addresses the series connection of large-capacity batteries, providing a new series connection method that changes the existing complex operation, difficult fastening, and instability issues. It provides a novel series connection structure that ensures the connection stability and safety of individual battery cells 1 while being low-cost and easy to operate.

[0042] This series connection structure for a large-capacity single battery cell 1 mainly involves setting a positive current collector 11 and a negative current collector 12 on both sides of the single battery cell 1. The positive current collector 11 and the negative current collector 12 are distributed on both sides. The positive current collector 11 of one single battery cell 1 is connected in series with the negative current collector 12 of the adjacent single battery cell 1 through a connecting component 2. The connection of the single battery cell 1 is completed by utilizing the space between the positive current collector 11 and the negative current collector 12, eliminating the need for wire connections between large-capacity single batteries and saving materials. In order to save installation space, grooves 13 and / or through holes 14 are provided on the positive current collector 11 and the negative current collector 12. One end of the connecting component 2 extends into the groove 13 and / or through hole 14 of one single battery cell 1, and the other end extends into the corresponding groove 13 and / or through hole 14 of the adjacent single battery cell 1. The series connection is completed using simple connection structures such as grooves 13 or through holes 14.

[0043] The structure of the connecting component 2 in this application can take the following forms:

[0044] The first type of connecting component 2 has the following structure: a strip-shaped U-shaped clamp. The positive current collector 11 and negative current collector 12 of the single cell 1 are provided with strip-shaped grooves 13 that match the clamping clamp. The two arms of the strip-shaped U-shaped clamp extend into the strip-shaped grooves 13 of the positive current collector 11 and negative current collector 12 of the two adjacent single cells 1. The two single cells 1 are connected in series using a simple U-shaped structure, which is convenient for operation.

[0045] The structure of the second type of connecting component 2 is as follows: the clamping fixture includes a first L-shaped arm 21, a second L-shaped arm 22, a fixing pin 23, and a fastening bolt 24. The fixing pin 23 is located at the turning point of the second L-shaped arm 22. The first L-shaped arm 21 and the second L-shaped arm 22 are hinged together by the fixing pin 23. The short arms of the first L-shaped arm 21 and the short arms of the second L-shaped arm 22 are stacked and connected by the fastening bolt 24. The entire clamping fixture can be tightened by tightening the fastening bolt 24. The operation is simple and the clamping effect is good.

[0046] The third type of connecting component 2 has the following structure: a connecting screw 25 and a connecting nut 26. One end of the connecting screw 25 is located in the groove 13 on the positive current collector post 11 of the single cell 1, and the other end of the connecting screw 25 extends to the groove 13 corresponding to the negative current collector post 12 of the adjacent single cell 1. Both ends of the connecting screw 25 are fastened by the connecting nut 26 located in the groove 13 of the single cell 1. The series connection of the batteries can be completed using simple standard connectors.

[0047] The fourth type of connecting component 2 has the following structure: it includes a locking screw, a locking nut, and a connecting clamp 27. The connecting clamp 27 has a U-shaped structure. The ends of the two arms of the connecting clamp 27 extend into the positive current collector 11 and negative current collector 12 corresponding to the two adjacent single cells 1, respectively. Screw holes are opened on the two arms of the connecting clamp 27 near the bottom of the U-shape. The two ends of the locking screw extend through the two screw holes to the outside of the connecting clamp 27. The two single cells 1 are connected in series and combined by a clamping principle similar to tweezers, which is convenient to operate and has good stability after clamping.

[0048] The structures of the four connection components 2 mentioned above can also be used in combination to enhance the fastening effect and improve stability. For example, the first type can be used in combination with the second and third connection structures.

[0049] In addition, in order to save installation space and improve heat transfer efficiency, this application provides an embedding groove 15 on the connecting surface of the positive current collector 11 and negative current collector 12 of two adjacent single cells 1. A heat pipe or heat exchanger 3 is embedded in the embedding groove 15, and the current collector is connected and integrated with the heat transfer component. One end of the heat pipe or heat exchanger 3 is bent into an L-shape, and the end bent to the horizontal part is connected to the semiconductor cooling chip.

[0050] Alternatively, the positive current collector 11 and the negative current collector 12 can have rectangular cross-sections, with one end of each being bent. The bent end of the positive current collector 11 and the negative current collector 12 is then connected to the semiconductor cooling chip.

[0051] To further illustrate the technical solution of this application, it will be described below in conjunction with the accompanying drawings and embodiments.

[0052] Example 1

[0053] like Figure 1 , Figure 2 , Figure 3 As shown, the large-capacity single-cell battery 1 connected in series in this embodiment is composed of 3 sets of large-capacity single-cell batteries 1 connected in series. The positive current collector 11 and negative current collector 12 of the 3 sets of single-cell batteries 1 are located on two opposite sides of the casing of the large-capacity battery. The cross-section of the current collector is rectangular, and part of the current collector protrudes from the casing and is insulated and sealed with the casing.

[0054] Further explanation: Grooves 13 are machined on the front and rear panels of the positive current collector 11 and negative current collector 12 of each individual battery 1. These grooves 13 are arranged along the length of the positive and negative current collectors 11 and 12, extending from the bottom to the top, forming a straight-through strip groove 13. When the first battery is connected in series with the second battery, the side of the negative current collector 12 of the first battery is in close contact with the side of the positive current collector 11 of the second battery. After this contact, the protrusions of the two corresponding straight-through grooves 13 on the adjacent negative current collector 12 and positive current collector 11 can be inserted into clamping fixtures (such as...). Figure 2As shown, the clamping fixture has a U-shaped structure, which matches the through groove 13 of the connected negative current collector 12 and positive current collector 11. The two arms extend into the strip groove 13 of the positive current collector 11 and negative current collector 12 corresponding to two adjacent single cells 1. Since the strip clamping fixture is tightly fitted with the protrusion of the adjacent through groove 13 on the connected positive current collector 11 and negative current collector 12, the two adjacent single cells 1 are clamped and connected. Similarly, two adjacent high-capacity batteries need two strip clamping fixtures to apply clamping force at the same time. In this way, the two sets of high-capacity batteries can be connected in series by the strip clamping fixture. The third and fourth single cells 1 are clamped in the same way. The positive and negative current collectors between the two single cells are directly connected, and the contact area is large, which effectively reduces the heat generation of the connection between the batteries. To make the adjacent positive and negative current collectors 12 fit more tightly, flexible conductive adhesive or conductive film can be placed between the contact surfaces of the adjacent positive and negative current collectors 12.

[0055] Example 2

[0056] The specific implementation of this embodiment is based on Embodiment 1, but differs from Embodiment 1 in that, as shown in Figure 4, this embodiment involves a series connection structure of a large-capacity single battery 1. The large-capacity single battery 1 is composed of three sets of large-capacity single batteries 1 connected in series. The positive and negative current collectors 12 of the three sets of single batteries 1 are located on opposite sides of the casing of the large-capacity battery. The current collectors have a rectangular cross-section, with a portion protruding from the casing and insulated from it. U-shaped insert grooves 15 are respectively formed on the connecting surfaces of the positive current collector 11 and negative current collector 12 of two adjacent single batteries 1. These U-shaped insert grooves 15 of the positive and negative current collectors 12 of two adjacent single batteries 1 are joined to form a rectangular through groove. A heat exchanger 3 is inserted into this rectangular through groove to simultaneously dissipate heat from the two adjacent single batteries 1.

[0057] To further explain, the heat exchanger 3 in this embodiment is a commercially available heat exchanger 3, which mainly serves the functions of heat transfer and heat dissipation. The upper end of the heat exchanger 3 is bent into an L-shape, and the bent portion extends to the top of the single cell 1, connecting with the semiconductor cooling chip installed above the single cell 1. That is, the semiconductor cooling chip cools the single cell 1 through the heat exchanger 3, and fully utilizes the heat transfer and heat equalization characteristics of the heat exchanger 3, as well as its large conduction area and high heat transfer efficiency, greatly improving the heat transfer efficiency.

[0058] Example 3

[0059] The specific implementation of this embodiment is based on Embodiment 1, and the difference from Embodiment 1 is as follows: Figure 5 , Figure 6As shown, in this embodiment, each single cell 1 has 5 pairs of rectangular grooves 13 arranged on the front and rear panels of the positive current collector 11 and negative current collector 12. The horizontal distance between the grooves 13 and the contact surfaces of the current collectors of the two single cells 1 is about 15cm. Through holes 14 are opened on the inner wall of the grooves 13 and on the corresponding contact surfaces of the current collectors of the two single cells 1. When the negative current collector 12 of the first cell and the positive current collector 11 of the second cell are connected in series, the 5 pairs of grooves 13 on the front panel of the two current collectors and the 5 pairs of grooves 13 on the rear panel are clamped and connected by the connecting component 2.

[0060] Further explanation: The connecting component 2 in this embodiment includes a connecting screw 25 and a connecting nut 26. One end of the connecting screw 25 is inserted into the through hole 14 in the groove 13 of the positive current collector 11 of the first single cell 1. The other end of the connecting screw 25 passes through the through hole 14 of the negative current collector 12 of the first single cell 1 and the through hole 14 of the positive current collector 11 of the second single cell 1, and extends into the groove 13 of the positive current collector 11 of the second single cell 1. The two ends of the connecting screw 25 are fastened by nuts located in the grooves 13 of the first single cell 1 and the second single cell 1, respectively. By tightening the nuts, the first single cell 1 and the second single cell 1 are clamped and connected in series.

[0061] By analogy, multiple individual cells 1 can be connected in series to form a large-capacity battery. The series connection of large-capacity batteries can be completed using simple standard connectors.

[0062] Example 4

[0063] The specific implementation of this embodiment is a variation based on Embodiment 1, and the difference from Embodiment 1 is as follows: Figure 7 , Figure 8 As shown, this embodiment relates to a series connection structure of a large-capacity single battery cell 1, in which the large-capacity single battery cell 1 is composed of 3 sets of large-capacity single battery cells 1 connected in series. The positive electrode current collector and negative electrode current collector column 12 of the 3 sets of single battery cells 1 are located on two opposite sides of the casing of the large-capacity battery. The cross-section of the current collector column is rectangular, and part of the current collector column protrudes from the casing and is insulated and sealed with the casing.

[0064] In this embodiment, five pairs of grooves 13 are provided on the positive current collector column 11, and five pairs of grooves 13 are provided at corresponding positions on the negative current collector column 12. The grooves 13 on the positive current collector column 11 and the grooves 13 on the negative current collector column 12 correspond one-to-one and are at the same height for easy alignment. The grooves 13 are rectangular. When the negative current collector column 12 of the first single cell 1 is connected in series with the positive current collector column 11 of the second single cell 1, U-shaped connecting clamps 27 are inserted into the five pairs of grooves 13 on the front panel and the five pairs of grooves 13 on the rear panel of the positive and negative current collector columns of the two single cells 1, respectively. The ends of the two arms of the connecting clamp 27 extend into the grooves 13 on the front and rear panels of the positive and negative current collector columns 11 and 12 corresponding to the two single cells 1, respectively. It should be further noted that the bottom of the U-shaped groove of the connecting clamp 27 can also be processed into a V-shaped groove, which deforms during clamping to ensure better clamping force of the two arms. In addition, two screw holes are correspondingly opened on the two arms of the U-shaped groove near the bottom of the U-shape. The two ends of the locking screw extend through the screw holes to the outside of the connecting clamp 27. The two single cells 1 are connected in series and combined by a clamping principle similar to tweezers, which is convenient to operate and has good stability after clamping. After inserting the locking screw, the clamping force is applied by the locking nuts on both sides. When the 10 sets of connecting clamps 27 on the adjacent current collector columns apply the clamping force together, the two sets of high-capacity batteries can be connected in series. The third battery is clamped in the same way. Flexible conductive adhesive or conductive film can also be placed between the close contact surfaces of adjacent positive and negative current collector columns 12 to make the fit tighter.

[0065] Example 5

[0066] The specific implementation of this embodiment is a variation based on embodiment 4, and the difference from embodiment 4 is as follows: Figure 9 , 10 As shown, in this embodiment, five pairs of grooves 13 are provided on the positive current collector 11, and five pairs of grooves 13 are provided at corresponding positions on the negative current collector 12. The grooves 13 on the positive current collector 11 correspond one-to-one with the grooves 13 on the negative current collector 12, and are at the same height for easy alignment. The grooves 13 are rectangular. When the negative current collector 12 of the first single cell 1 is connected in series with the positive current collector 11 of the second single cell 1, clamping fixtures are inserted into the five pairs of grooves 13 on the front plate and the five pairs of grooves 13 on the rear plate of the positive and negative current collectors of the two single cells 1.

[0067] See Figure 10The clamping fixture includes a first L-shaped arm 21, a second L-shaped arm 22, a fixing pin 23, and a fastening bolt 24. The fixing pin 23 is located at the turning point of the second L-shaped arm 22. The first L-shaped arm 21 and the second L-shaped arm 22 are hinged together by the fixing pin 23. The short arms of the first L-shaped arm 21 and the short arms of the second L-shaped arm 22 are stacked and connected by the fastening bolt 24. By tightening the fastening bolt 24, the gap between the short arms of the first L-shaped arm 21 and the second L-shaped arm 22 can be compressed to form a tension clamp, and the gap between the long arms of the first L-shaped arm 21 and the second L-shaped arm 22 can be gradually reduced, so that the entire clamping fixture can be tightened. The operation is simple and the clamping effect is good.

[0068] Example 6

[0069] The specific implementation of this embodiment is a variation based on embodiment 2. The difference from embodiment 2 is that: in this embodiment, the positive current collector 11 and negative current collector 12 corresponding to two adjacent single cells 1 are respectively provided with embedding grooves 15, so that the embedding grooves 15 of the positive and negative current collectors 12 of the two adjacent single cells 1 are spliced ​​together to form a circular through groove, and multiple heat pipes are embedded in the through groove to dissipate heat and transfer heat to the two adjacent single cells 1 at the same time.

[0070] To further explain, the heat pipe in this embodiment is a commercially available heat pipe, which mainly serves the functions of heat transfer and heat dissipation. The upper end of the heat pipe is bent into an L-shape, and the bent portion extends to the top of the single cell 1, connecting with the semiconductor cooling chip installed above the single cell 1. That is, the semiconductor cooling chip cools the single cell 1 through the heat exchanger 3.

[0071] It should be further explained that the number of heat pipes in this embodiment can be set individually or in parallel, depending on the location and size of the mounting slot 15. However, it is best to ensure that the heat pipe wall is tightly fitted to the inner wall of the positive and negative collector columns to ensure good heat transfer effect.

[0072] The number, groove shape, and arrangement position of the grooves 13 or through holes 14 on the positive and negative current collectors involved in embodiments 1 to 6 above can be adaptively adjusted according to the configuration of the positive and negative current collectors of the single cell 1. The above are only preferred placement positions and are not limited to the above implementation scenarios. In addition, the material of the current collectors and the material, size, and quantity of the connecting components 2 involved in the above embodiments can be adjusted according to the actual situation. Taking the fastening effect, cost, and performance stability as design premises, existing materials, specifications, and processing conditions can be optimally selected while ensuring the effect and performance. This part regarding material selection, quantity setting, etc., is not a unique design feature of this application.

[0073] This application mainly utilizes connecting components 2 with different configuration transformations to connect two adjacent single cells 1 in series, thereby meeting practical usage requirements. At the same time, by connecting two adjacent single cells 1 in series with connecting components 2, the structure of multiple single cells 1 connected in series is stable and will not shake, thereby ensuring the stability and safety of the single cells 1 connected in series. It also ensures convenient connection, structural stability, and small space occupation.

[0074] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A series connection structure for high-capacity single-cell batteries, characterized in that, The positive current collector post (11) and the negative current collector post (12) are arranged at two opposite sides of the shell of the single battery (1); the cross section of the positive current collector post and the negative current collector post is rectangular, and the positive current collector post and the negative current collector post partially protrude out of the shell and are insulated and sealed with the shell; The positive current collector post (11) of one single battery is tightly attached to the side of the negative current collector post (12) of an adjacent single battery; Grooves are respectively machined on the front panel and the back panel of the positive current collector post and the negative current collector post of each single battery, and the grooves are arranged along the length direction of the positive current collector post and the negative current collector post, i.e. from the bottom to the top of the positive current collector post and the negative current collector post, forming a straight-through strip-shaped groove; The positive current collector post (11) of one single battery is connected in series with the negative current collector post (12) of an adjacent single battery through a connecting assembly (2); The connecting assembly (2) comprises a clamping clamp, which is a strip-shaped U-shaped clamp, and the two arms of the clamping clamp extend into the straight-through strip-shaped groove of the positive current collector post and the negative current collector post corresponding to the adjacent two single batteries.

2. The connection structure of a large capacity single battery in series as recited in claim 1, wherein The clamping clamp further comprises a first L-shaped arm (21), a second L-shaped arm (22), a fixing pin shaft (23) and a fastening bolt (24), the fixing pin shaft (23) is arranged at the turning position of the second L-shaped arm (22), and the first L-shaped arm (21) is hinged with the second L-shaped arm (22) through the fixing pin shaft (23); the short arm of the first L-shaped arm (21) and the short arm of the second L-shaped arm (22) are arranged in a stack and connected through the fastening bolt.

3. The connection structure of a large capacity single battery in series as recited in claim 1, wherein The connecting assembly further comprises a connecting screw (25) and a connecting nut (26), one end of the connecting screw (25) is located in the groove (13) on the positive current collector post (11) of the single battery, the other end of the connecting screw (25) extends into the groove (13) corresponding to the negative current collector post (12) of the adjacent single battery, and the two ends of the connecting screw (25) are respectively fastened through the connecting nuts (26) located in the grooves (13) of the single batteries.

4. The connection structure of a large capacity single battery in series according to claim 1, wherein The connecting assembly comprises a locking screw, a locking nut and a connecting clamp (27), the two ends of the connecting clamp (27) respectively extend into the positive current collector post (11) and the negative current collector post (12) corresponding to the adjacent two single batteries; the locking screw extends from one side end of the connecting clamp (27) to the other side end, and the locking nut is arranged at the two ends of the locking screw and located outside the connecting clamp (27).

5. The connection structure of a large capacity single battery in series as recited in claim 4, wherein The connecting clamp (27) is in a U-shaped structure, the two side arms of the connecting clamp (27) respectively extend into the positive current collector post (11) and the negative current collector post (12) corresponding to the adjacent two single batteries; screw holes are respectively formed on the two side arms of the connecting clamp (27) close to the bottom of the U-shaped structure, and the two ends of the locking screw respectively pass through the two side screw holes and extend to the outside of the connecting clamp (27).

6. The connection structure of a large capacity single battery in series as recited in claim 1, wherein The positive current collector post (11) and the negative current collector post (12) of the adjacent two single batteries are connected and tightly attached to the embedding groove (15) formed on the connecting and tightly attached surface, and a heat pipe or a heat sink (3) is embedded in the embedding groove (15).

7. The connection structure of a large capacity single battery in series according to claim 6, wherein One end of the heat pipe or heat pipe (3) is bent into L type, and the end of the horizontal part is connected with the semiconductor refrigeration sheet.

8. The connection structure of a large capacity single battery in series according to claim 1, wherein The cross section of the positive electrode current collector post (11) and the negative electrode current collector post (12) is rectangular structure, and one end of the positive electrode current collector post (11) and the negative electrode current collector post (12) is bent.

9. The connection structure of a large capacity single battery in series according to claim 8, wherein The bent end of the positive electrode current collector post (11) and the negative electrode current collector post (12) is connected with the semiconductor refrigeration sheet.

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