Pole pole adapters, high-capacity batteries, and energy storage equipment

Abstract

The system consists of a pole adapter, a high-capacity battery (2, 4), and an energy storage device. The pole adapter is connected to the pole of a single cell (21) and is used to raise or lower the temperature of the pole. The high-capacity battery (2, 4) includes multiple single cells 21, each having a pole adapter. The energy storage device also includes multiple high-capacity batteries (2, 4). The pole adapter can eliminate the problem of thermal runaway that can occur in conventional high-capacity batteries (2, 4) due to excessive heat at the pole of the single cell (21).

Description

Technical Field

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[0001] This application belongs to the field of batteries, and specifically relates to a pole adapter, a large-capacity battery, and an energy storage device.

Background Art

[0002] Currently, all general large-capacity batteries are configured by connecting a plurality of single cells (single cells are generally cylindrical batteries or rectangular batteries) in series, parallel, or a combination of series and parallel.

[0003] Temperature control of large-capacity batteries has always been a hot spot in this field. Conventional large-capacity batteries often perform temperature control on the entire large-capacity battery in the form of air cooling or liquid cooling. However, since the pole of the single cell in the large-capacity battery is the part where heat is most concentrated, if the local heat of the pole is too high, there is a very high possibility of causing thermal runaway of the single cell in the large-capacity battery.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to solve the problem that the heat at the pole of the single cell in the conventional large-capacity battery is too high and may cause thermal runaway, this application provides a pole adapter that is connected to the pole of the single cell and is used to increase or decrease the temperature of the pole.

Means for Solving the Problems

[0005] Based on the above technical concept, this application provides a total of the following six specific solutions. Solution 1: In the first aspect, this solution provides a pole adapter, which includes a single elongated member. The elongated member is used to connect to the positive or negative poles of a plurality of single cells in a large-capacity battery, and a clamp portion for attaching a heat transfer tube is provided along the axial direction of the elongated member.

[0006] The high-capacity battery not only enables electrical connection of each individual cell using the pole adapter, but also, since a heat transfer tube is attached to the pole adapter, the heat concentrated on the pole can be transferred from the pole adapter to the heat transfer tube, and then the heat can be taken out and processed by an external temperature control device. Similarly, if the ambient temperature is too low and there is a possibility that the individual cells may not start up properly, the external temperature control device can also raise the temperature of each individual cell using the heat transfer tube and pole adapter.

[0007] Furthermore, since the pole adapter is a single elongated member, when this elongated member connects to the poles of each cell, the temperature distribution is more uniform when raising or lowering the temperature of each cell's pole, resulting in a better temperature control effect.

[0008] Compared to screw connections or other methods, the elongated member is connected to the positive or negative electrode column of each cell by welding, and the connection by welding is more reliable and provides better heat conduction. To facilitate welding, the elongated member is a rectangular column, and the clamp portion is a through groove opened in the rectangular column, and the dimensions of the through groove are suitable for the heat transfer tube. The heat transfer tube can be installed in the through groove by engagement, and this installation method is not only easy to install, but also, by using the through groove, a reasonable welding thickness can be achieved when laser welding is used between the elongated member and the positive and negative electrodes of the cell. The cross-section of the through groove is C-shaped. The C-shaped through groove has natural tension at the opening, which is advantageous for more tight engagement of the heat transfer tube within the through groove, ensuring better heat conduction between the electrode adapter and the heat transfer tube. To facilitate welding, the elongated member is a rectangular column, and the clamp portion is a first through hole opened in the rectangular column, and the diameter of the first through hole is suitable for the heat transfer tube. The heat transfer tube can be drilled into the first through-hole, and this mounting method can increase the heat exchange area between the heat transfer tube and the elongated member, thereby improving the heat conduction effect. The elongated member has multiple second through-holes that penetrate the first through-hole, and the position of each second through-hole must be such that, when the elongated member is connected to each cell, the positive or negative pole of one cell corresponds below each second through-hole. The opening of these second through-holes can provide a transmission path to the laser spot for laser welding, and the pole adapter can be welded and fixed to the positive or negative pole of each cell.

[0009] In a second embodiment, the present invention provides a high-capacity battery comprising a high-capacity battery body, heat transfer tubes, and pole adapters, wherein the high-capacity battery body comprises a plurality of single cells arranged side by side, there are two pole adapters, one of which is connected to the positive terminal of all single cells to form the positive pole of the high-capacity battery, and the other pole adapter is connected to the negative terminal of all single cells to form the negative pole of the high-capacity battery, and there are two heat transfer tubes, each of which is connected to the clamp portion of the two pole adapters and used to achieve heat exchange with the pole of each single cell.

[0010] In a third embodiment, the present solution provides an energy storage device comprising N or more of the above-mentioned high-capacity batteries and N-1 electrical connectors, where N≧2, and the N high-capacity batteries are arranged side by side, with two adjacent high-capacity batteries connected in series via one electrical connector, with part of the electrical connector connected to a pole adapter which is the positive pole of one high-capacity battery, and the other part of the electrical connector connected to a pole adapter which is the negative pole of the other high-capacity battery. In this solution, the energy storage device is constructed simply by connecting two high-capacity batteries in series via one electrical connector, resulting in a compact structure and easy assembly.

[0011] Furthermore, the electrical connector includes at least one metal aluminum plate, and the metal aluminum plate is connected to the pole adapter by screws. The screw connection method simplifies the assembly process, and the metal aluminum plate serves as the electrical connector. Since the aluminum plate itself has a good amount of flexible deformation, it can provide a buffering protection capability between adjacent high-capacity batteries. In addition, when clamping the heat transfer tubes in the through grooves, the same number of metal aluminum plates as the number of batteries may be used to clamp the heat transfer tubes more tightly within the through grooves. One plate can provide greater overcurrent capacity, and two plates can provide constant pressure on the heat transfer tubes, resulting in a tighter fit between the heat transfer tubes and the through grooves and a better heat conduction effect.

[0012] Furthermore, the electrical connector includes at least one metal aluminum plate, and the metal aluminum plate and the two adjacent pole adapters in two adjacent high-capacity batteries are a single integrated component. This design allows for the fixing of the positive and negative electrodes and pole adapters in each cell within the same high-capacity battery (i.e., parallel connection of each cell within the same high-capacity battery) by a primary welding method, and also allows for series connection of adjacent high-capacity batteries, without requiring any other extra assembly steps, resulting in simpler assembly.

[0013] Plan 2: In a first embodiment, the present invention provides a pole adapter, the pole adapter comprising a single elongated member used to connect to the positive or negative poles of multiple single cells in a high-capacity battery, and the elongated member having a heat exchange passage for transmitting a heat transfer medium.

[0014] In a high-capacity battery, the pole adapter not only enables electrical connection of each individual cell, but also provides a heat exchange passage, allowing heat concentrated on the poles of the individual cells to be transferred from the pole adapter to the heat transfer medium in the heat exchange passage, and then released. By the same logic, if the ambient temperature is too low and there is a possibility that the individual cells may not start up properly, the heat transfer medium and pole adapter can be used to raise the temperature of each individual cell.

[0015] Furthermore, the pole adapter is a single elongated member, and when the poles of each cell are connected to this elongated member, the temperature distribution is more uniform when raising or lowering the temperature of each cell's pole, resulting in a better temperature control effect.

[0016] The axis of the heat exchange passage is parallel to the longitudinal axis of the elongated member and extends along the axial direction of the elongated member. Multiple blind holes are uniformly provided in the elongated member, and the bottom of each blind hole is used to connect to the positive or negative electrode of a single cell, and the blind holes are separated from the heat exchange passage; however, in actual use, it is found that the conductivity of the electrode adapter is poor when blind holes are provided, so this solution improves the conductivity of the part by connecting the electrode adapter to the single cell electrode, fixing the conductive pole inside the blind hole, and making the outer wall of the conductive pole tightly in contact with the inner wall of the blind hole. In order to improve the connection strength between the electrode adapter and the single cell electrode, the bottom of the blind hole is connected to the single cell electrode of the battery by welding; in order to relieve welding stress, a through hole is provided at the bottom of the blind hole that penetrates the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole.

[0017] Furthermore, the pole adapter further includes an electrical connection pole, which is fixed to an area corresponding to a blind hole at the bottom of the pole adapter body; the electrical connection pole is used to contact the positive or negative pole of a single cell; and the blind hole extends to the electrical connection pole. In the manufacturing process of a high-capacity battery, it is not necessary to use support ribs to raise the single cell and cause its poles to protrude from the pole relief holes in the top plate of the cylinder; the electrical connection pole of the pole adapter can be extended into the pole relief holes and connected to each single cell pole inside the cylinder.

[0018] To further improve the heat exchange effect, a clamp portion for attaching a heat transfer tube is provided along the axial direction of the elongated member. The clamp portion is a through groove opened in the elongated member, the dimensions of which are suitable for the heat transfer tube, and the through groove and the heat exchange passage are separated from each other. After the heat transfer tube is fixed in the through groove, it is used in cooperation with the heat exchange passage to exchange heat with the single cell electrode column of a large-capacity battery, resulting in a relatively high heat exchange efficiency.

[0019] Furthermore, the through groove penetrates the blind hole.

[0020] In a second embodiment, the present invention provides a high-capacity battery comprising a plurality of single cells and two pole adapters, wherein the plurality of single cells are arranged sequentially along the same direction, one pole adapter is connected to the positive terminal of all the single cells, and the other pole adapter is connected to the negative terminal of all the single cells.

[0021] Furthermore, the above-mentioned high-capacity battery further includes a case, in which multiple single cells are arranged sequentially within the case in the same direction, with pole relief holes corresponding to each single cell pole provided on the top of the case, and the case area corresponding to the pole relief holes is fixed and sealed to the single cell housing, and the electrical connection poles of the pole adapter extend into the pole relief holes and are electrically connected to each single cell pole.

[0022] Plan 3: In its first embodiment, the present invention provides a pole adapter, the pole adapter comprising a pole adapter body having n first holes, each first hole connected to a single cell pole, where n ≥ 1. By adding pole adapters to the poles of a single cell, the present invention increases the heat dissipation area of ​​the poles. When such single cells are grouped together, the heat concentrated on the poles can be released through the pole adapters, reducing the risk of thermal runaway. Furthermore, when the pole adapter body has multiple first holes, the pole adapter body is a single elongated member, and when this elongated member connects the poles of each single cell, the temperature distribution of each single cell pole is more uniform, resulting in a better heat dissipation effect.

[0023] To improve the conductivity of the pole adapter, the pole adapter further includes n conductive columns, the n conductive columns are fixed in the first holes in a one-to-one correspondence with the n first holes, and the outer walls of the conductive columns are in close contact with the inner walls of the first holes. This improves both conductivity and thermal conductivity of the pole adapter. To improve the reliability of the connection between the pole adapter and the poles, the first holes are blind holes, the bottoms of the blind holes are connected to the single cell poles by welding, and to relieve welding stress, through holes are provided at the bottom of the blind holes, with the diameter of the through holes being smaller than the diameter of the blind holes. Through grooves for attaching heat transfer tubes may be further provided in the pole adapter, and the dimensions of the through grooves are suitable for the heat transfer tubes. By fixing the heat transfer tubes in the through grooves, the heat concentrated on the poles can be transferred from the pole adapter to the heat transfer tubes, and then the heat can be carried out. By the same logic, if the ambient temperature is too low and there is a possibility that the individual cells may not start up properly, an external temperature control device can also raise the temperature of each individual cell using heat transfer tubes.

[0024] Four screw holes are uniformly distributed in the pole adapter body area around the stop hole. When a large-capacity battery is constructed using a pole adapter body with one first hole opened, the first electrical connector and the pole adapter can be connected with screws. Compared with the method where the first electrical connector is directly connected to each single-cell pole, the contact between the first electrical connector and the pole adapter becomes closer by combining the four screw holes and screws.

[0025] When constructing an energy storage device, the second electrical connector and the pole adapter can be connected with screws. Compared with the method where the second electrical connector is directly connected to each single-cell pole, the contact between the second electrical connector and the pole adapter becomes closer by combining the four screw holes and screws.

[0026] In the second aspect, the solution provides a large-capacity battery, which includes m single cells and a first electrical connector. Each single cell includes a positive pole and a negative pole, and the above pole adapter is connected to both the positive pole and the negative pole. By connecting the first electrical connector to the pole adapter of each single cell, series or parallel connection of each single cell is realized.

[0027] In the third aspect, the solution provides a large-capacity battery, which includes m single cells, where m > 1, and further includes two of the above pole adapters. m first holes are opened in the pole adapter body. One of the pole adapters is connected to the positive poles of all single cells, and the other pole adapter is connected to the negative poles of all single cells.

[0028] The above large-capacity battery may further include a heat transfer tube, and the heat transfer tube is installed in a through groove on the pole adapter body. The heat transfer tubes are connected in series to all the pole adapters in a serpentine arrangement.

[0029] In a fourth embodiment, the present invention provides an energy storage device comprising a plurality of high-capacity batteries and a second electrical connector, wherein the plurality of high-capacity batteries are arranged side by side, and two adjacent high-capacity batteries are connected in series via the second electrical connector, with one side of the second electrical connector connected to a pole adapter at the positive pole of each cell of one high-capacity battery, and the other side of the second electrical connector connected to a pole adapter at the negative pole of each cell of the other high-capacity battery.

[0030] Plan 4: In a first embodiment, the present invention provides a pole pole adapter comprising a pole pole adapter body and n electrical connection poles fixed to the pole pole adapter body and protruding from the pole pole adapter body, where n ≥ 1, and a first hole is provided in the pole pole adapter body corresponding one-to-one with the n electrical connection poles, and each electrical connection pole is connected to a single cell pole through each first hole. This solution increases the heat dissipation area of ​​the pole poles by adding pole pole adapters to the pole poles of a single cell, and when grouped based on such single cells, the heat concentrated on the pole poles can be released from the pole pole adapter, reducing the risk of thermal runaway. Furthermore, the pole pole adapter simplifies the manufacturing process of the associated high-capacity battery, eliminating the need to use support ribs to elevate the single cell and cause its pole poles to protrude from the pole pole relief holes in the top plate of the cylindrical body. Instead, the electrical connection poles of the pole pole adapter can be extended into the pole pole relief holes and connected to each single cell pole in the case.

[0031] To improve the conductivity of the electrical connection pole, the pole adapter further includes n conductive poles, the n conductive poles being fixed in the first holes in a one-to-one correspondence with the n first holes, and the outer walls of the conductive poles being in close contact with the inner walls of the first holes. The first holes are blind holes and extend to the electrical connection pole. Based on the fact that the bottom of the blind holes are connected to the poles, this can generally be achieved by using screw connections or welding.

[0032] To improve the connection strength between the pole adapter and the pole, the bottom of the blind hole is connected to the single cell pole by welding. To relieve welding stress, a through hole is provided at the bottom of the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole. To improve the safety performance of such a large-capacity battery, the pole adapter body is a rectangular block, and a clamp portion for attaching a heat transfer tube is provided on the pole adapter body. The clamp portion is a through groove provided in the pole adapter body, and the dimensions of the through groove are suitable for the heat transfer tube. The through groove penetrates the blind hole.

[0033] In a second embodiment, the present invention provides a high-capacity battery comprising a case, m single cells arranged within the case, and 2m pole adapters, where m > 1, with one electrical connection pole fixed to the pole adapter body; the case consists of a cylindrical body and end plates fixed to both ends thereof; pole relief holes corresponding to each single cell pole are provided in the top plate of the cylindrical body, and the case regions corresponding to the pole relief holes are fixed and sealed to the housing of the single cells; the positive and negative poles of each single cell each correspond to one pole adapter, and the electrical connection pole of each pole adapter extends into the pole relief hole and is connected to the corresponding pole of the single cell.

[0034] In a third embodiment, the present invention provides a high-capacity battery comprising a case, m single cells arranged within the case, and two pole adapters, where m > 1, and m electrical connection poles fixed to the pole adapter body; the case consists of a cylindrical body and end plates fixed to both ends thereof; pole relief holes corresponding to each single cell pole are provided in the top plate of the cylindrical body, and the case regions corresponding to the pole relief holes are fixed and sealed to the housing of the single cells; the m electrical connection poles of one pole adapter extend into their respective pole relief holes and are connected to the positive pole pole of each single cell, and the m electrical connection poles of the other pole adapter extend into their respective pole relief holes and are connected to the negative pole pole of each single cell.

[0035] In a fourth embodiment, the present invention provides an energy storage device comprising a plurality of large-capacity batteries and an electrical connector, wherein the plurality of large-capacity batteries are arranged side by side, and two adjacent large-capacity batteries are connected in series via an electrical connector, with one side of the electrical connector connected to a pole adapter at the positive pole of each cell of one large-capacity battery, and the other side of the electrical connector connected to a pole adapter at the negative pole of each cell of the other large-capacity battery.

[0036] Plan 5: The present invention provides a pole adapter, which includes a pole adapter body and an electrical connection member provided on the pole adapter body. The pole adapter body is used to connect to each cell pole, and the pole adapter body is provided with a clamp for attaching a liquid cooling tube. The electrical connection member is used to connect to an external electrical connector and to prevent the insulating sealing adhesive from overflowing from some adhesive injection areas. The present invention provides a clamp for attaching a liquid cooling tube to the pole adapter body, and by fixing the liquid cooling tube to the clamp, the heat concentrated on the pole can be transferred from the pole adapter to the liquid cooling tube and then released. By the same logic, if the ambient temperature is too low and there is a possibility that the cell may not start up properly, the external temperature control device can also raise the temperature of each cell using the liquid cooling tube. Furthermore, by adding electrical connection components to the pole adapter body, a portion of the structure of the electrical connection components can be connected to an external electrical connector, or it can be a direct electrical connector, enabling the series connection of at least two high-capacity batteries; the structure of the other portion of the electrical connection components can be an adhesive fastening structure, preventing the insulating sealing adhesive liquid from overflowing from some adhesive injection areas, and when laying an insulating sealing adhesive layer on the case top plate that is thicker than the pole adapter thickness, the use of some adhesive injection molds can be reduced, simplifying the adhesive injection process.

[0037] The electrical connection member described above is an inverted L-shaped plate. The vertical plate of the inverted L-shaped plate is parallel to the xz plane and is fixed to the top surface of the pole adapter. It is used to prevent the insulating sealing adhesive from overflowing from a portion of the adhesive injection area, which is the top surface of the pole adapter. The horizontal plate of the inverted L-shaped plate is parallel to the xy plane and is used to connect to an external electrical connector or to function as an electrical connector. When an inverted L-shaped plate electrical connection member is used, adhesive can be injected to the top surface of the pole adapter. The vertical plate prevents the insulating sealing adhesive from overflowing from the top surface of the pole adapter. The horizontal plate is connected to an external electrical connector and can also function as a direct electrical connector. The structure is simple, and it can also be integrally molded with the pole adapter.

[0038] Furthermore, the electrical connection member further includes a first bearing plate, which is parallel to the xz plane, fixed to the lateral plate of the inverted L-shaped plate, and extends toward the bottom surface of the pole adapter.

[0039] Furthermore, the electrical connection member is a Z-shaped plate and includes a first electrical connection plate, a second electrical connection plate, and a third connection plate. The first electrical connection plate is parallel to the xy plane and covers and is fixed to the top surface of the pole adapter. The top surface of the first electrical connection plate serves as a partial adhesive injection area. A liquid cooling pipe relief notch is provided on the surface of the first electrical connection plate that engages with the top surface of the pole adapter. The third connection plate is located between the first and second electrical connection plates and is used to prevent insulating sealing adhesive from overflowing from the partial adhesive injection area. The partial adhesive injection area is the top surface of the first electrical connection plate. The second electrical connection plate is parallel to the xy plane and is used for connecting to an external electrical connector.

[0040] By adopting a Z-shaped plate electrical connection member, the first electrical connection plate can be covered and fixed to the top surface of the pole adapter, and adhesive can be injected into the top surface of the first electrical connection plate of the Z-shaped plate, the third connection plate can prevent the insulating sealing adhesive from overflowing from the top surface of the first electrical connection plate, the second electrical connection plate is connected to an external electrical connector, or may be a direct electrical connector, the electrical connection member is provided separately from the pole adapter, and when the electrical connection member is fixed to the pole adapter, it can also play a role in firmly holding the liquid cooling pipe, increasing the contact area between the liquid cooling pipe and the clamp portion of the liquid cooling pipe, and improving the heat exchange efficiency.

[0041] Furthermore, the electrical connection member further includes an L-shaped electrical connection plate, the vertical connection plate of the L-shaped electrical connection plate being connected to a second electrical connection plate, and the horizontal connection plate extending away from the first electrical connection plate, and being connected to or used to form an external electrical connector.

[0042] Furthermore, the pole adapter body is fixed to the pole adapter and includes n electrical connection poles protruding from the pole adapter, where n ≥ 1. The pole adapter has first holes that correspond one-to-one with the n electrical connection poles, and each electrical connection pole is connected to a single cell pole through each of the first holes. The clamp portion is a through groove formed in the pole adapter, and the dimensions of the through groove are suitable for a liquid cooling tube.

[0043] Plan 6: In its first embodiment, the present invention provides a pole adapter in which an insulating layer and an insulating sleeve are simultaneously installed in the through groove or through hole in the conductive column for mounting the heat transfer tube, thereby forming double insulation. With this double insulation, even if one of the insulating layer or insulating sleeve is damaged when the heat transfer tube and the single cell pole adapter perform heat exchange, reliable insulation performance can be maintained between the heat transfer tube and the single cell pole adapter, thereby improving the safety of the single cell during use. In the pole adapter according to this invention, the insulating layer is a hard oxide layer formed after the through groove or through hole in the conductive column is oxidized, and its thickness is 20 μm to 50 μm. An insulating layer with such a structure is less prone to failure and has strong insulating stability.

[0044] In the pole adapter according to this design, the insulating layer is an insulating varnish applied to the through groove or through hole of the conductive column. This type of insulating layer is easy to process on-site, has simple processing steps, and low processing costs. In the pole adapter according to this design, the insulating sleeve is a thermally conductive plastic sleeve or thermally conductive rubber sleeve that has good insulating and thermal conductivity. At the same time, the thickness of the insulating sleeve is 0.1 mm to 0.5 mm, and this thickness ensures that the insulating sleeve has excellent insulating performance and good thermal conductivity. In the pole adapter according to this design, the insulating sleeve is installed in the through groove or through hole of the conductive column having an insulating layer by a thermal shrinkage method. This method results in almost no thermal conduction gap between the insulating sleeve and the through groove or through hole of the conductive column, resulting in better thermal conductivity of the insulating sleeve. In the pole adapter according to this design, the cross-section of the through groove is C-shaped or U-shaped, which allows the heat transfer tube to be securely installed in the through groove.

[0045] In a second embodiment, the present invention provides a high-capacity battery comprising a case, a plurality of single cells, and a pole adapter, wherein the plurality of single cells are arranged side by side within the case, and a shared chamber is provided within the case to enable communication between at least one of the gas region and the electrolyte region of each single cell, pole relief holes are provided at the top of the case corresponding to the single cell poles of each single cell, and the single cell poles of each single cell are connected to a pole adapter via the pole relief holes, the pole adapter being the pole adapter described in any one of the above paragraphs, and heat transfer tubes are provided in through grooves or through holes of the pole adapter of each single cell. [Brief explanation of the drawing]

[0046] [Figure 1] This is a structural diagram of the elongated member corresponding to the case where the clamp portion in Example 1 is in form 2. [Figure 2] This is a structural diagram of a high-capacity battery corresponding to the case where the clamp portion in Example 1 is in form 2. [Figure 3] This is a structural diagram of the elongated member corresponding to the case where the clamp portion in Example 1 is in form 3. [Figure 4] This is a structural diagram of a high-capacity battery corresponding to the case where the clamp portion in Example 1 is in form 3. [Figure 5] This is a schematic diagram of the structure of a large-capacity battery with electrolyte sharing function in Example 2. [Figure 6] This is a schematic diagram of the structure of a large-capacity battery with electrolyte sharing function in Example 2. [Figure 7] This is a schematic diagram of the structure of a large-capacity battery having a gas equilibrium function or an explosion dissipation function in Example 2. [Figure 8] This is a schematic diagram of the structure of a large-capacity battery having a gas equilibrium function or an explosion dissipation function in Example 2. [Figure 9] This is a schematic diagram of the structure of a large-capacity battery that simultaneously has electrolyte sharing and gas equilibrium functions in Example 2. [Figure 10]This is a schematic diagram of the structure of a large-capacity battery in Example 2 that simultaneously has electrolyte sharing and gas equilibrium functions. [Figure 11] This is a schematic diagram of the structure of the integrated electrical connector in Example 3. [Figure 12] This is a schematic diagram of the structure of the energy storage device in Example 3. [Figure 13] This is a schematic diagram of the pole adapter structure of Example 4. [Figure 14] This is a schematic diagram of the pole adapter structure of Example 5. [Figure 15] This is a schematic diagram of the exploded structure of the pole adapter having a conductive column in Example 5. [Figure 16] This is a schematic diagram of the cylindrical structure of a type of high-capacity battery in Example 6. [Figure 17] This is a schematic diagram of the cylindrical structure of another type of high-capacity battery in Example 6. [Figure 18] This is a schematic diagram of the pole adapter structure of Example 6. [Figure 19] This is a schematic diagram of the pole adapter of Example 6 at a different viewing angle. [Figure 20] This is a cross-sectional view of the pole adapter of Embodiment 6. [Figure 21] This is a partial cross-sectional view of the high-capacity battery in Example 6. [Figure 22] This is a schematic diagram of the pole adapter structure of Example 7. [Figure 23] This is a schematic diagram of the structure of a type of high-capacity battery in Example 9. [Figure 24] This is a schematic diagram of the structure of another type of high-capacity battery in Example 9. [Figure 25] This is a schematic diagram of the pole adapter structure of Example 11. [Figure 26] These are schematic diagrams of the single cell structure in Examples 11 and 4. [Figure 27] This is a schematic diagram of the structure of the pole adapter provided with conductive poles in Example 11. [Figure 28] This is a schematic diagram of the exploded structure of the pole adapter provided with conductive poles in Example 11. [Figure 29] This is a schematic diagram of the pole adapter structure of Example 12. [Figure 30] This is a schematic diagram of the structure of a type of pole pole adapter in Example 13. [Figure 31] This is a schematic diagram of the structure of another type of pole pole adapter in Example 13. [Figure 32] This is a schematic diagram of the structure of a type of high-capacity battery in Example 15. [Figure 33] This is a schematic diagram of the structure of another type of high-capacity battery in Example 15. [Figure 34] This is a schematic diagram of the structure of the third type of high-capacity battery in Example 15. [Figure 35] This is a schematic diagram of the structure of a type of high-capacity battery in Example 16. [Figure 36] This is a schematic diagram of the structure of another type of high-capacity battery in Example 16. [Figure 37] This is a schematic diagram of the structure of a type of high-capacity battery in Example 17. [Figure 38] This is a schematic diagram of the structure of another type of high-capacity battery in Example 17. [Figure 39] This is a schematic diagram of the structure of the third type of high-capacity battery in Example 17. [Figure 40] This is a schematic diagram of the structure of a high-capacity battery in related technologies. [Figure 41] This is a schematic diagram of a cylindrical structure, a type of high-capacity battery in related technologies. [Figure 42] This is a schematic diagram of another type of cylindrical structure for a high-capacity battery in related technologies. [Figure 43] This is a schematic diagram of the pole adapter structure of Example 19. [Figure 44] This is a schematic diagram of the pole adapter of Example 19 at a different viewing angle. [Figure 45] This is a partial cross-sectional view of the high-capacity battery in Example 19. [Figure 46] This is a schematic diagram of the structure of the pole pole adapter with a blind hole in Example 19. [Figure 47]This is a schematic diagram of the pole pole adapter with a blind hole from Example 19, viewed from a different angle. [Figure 48] This is a schematic diagram of the exploded structure of the pole adapter provided with conductive poles in Example 19. [Figure 49] This is a cross-sectional view of the pole adapter provided with conductive poles in Example 19. [Figure 50] This is a schematic diagram of the pole adapter structure of Example 20. [Figure 51] This is a schematic diagram of the structure of a type of pole pole adapter in Example 21. [Figure 52] This is a schematic diagram of the structure of a type of pole pole adapter in Example 21 at a different viewing angle. [Figure 53] This is a schematic diagram of the structure of another type of pole pole adapter in Example 21. [Figure 54] This is a schematic diagram of the structure of the third type pole adapter in Example 21. [Figure 55] This is a schematic diagram of the structure of a type of high-capacity battery in Example 22. [Figure 56] This is a schematic diagram of the structure of another type of high-capacity battery in Example 22. [Figure 57] This is a schematic diagram of the structure of a type of high-capacity battery in Example 23. [Figure 58] This is a schematic diagram of the structure of another type of high-capacity battery in Example 23. [Figure 59] This is a schematic diagram of the structure of a high-capacity battery in related technologies. [Figure 60] This is a cross-sectional view of a high-capacity battery in related technology. [Figure 61] This is a schematic diagram of the pole adapter structure of Example 25. [Figure 62] This is a cross-sectional view of the pole adapter in Example 25. [Figure 63] This is a schematic diagram of the structure of the high-capacity battery in Example 26. [Figure 64] This is a schematic diagram of the partially disassembled structure of the high-capacity battery in Example 27. [Figure 65] This is a schematic diagram of the structure of the high-capacity battery in Example 27. [Figure 66] This is a schematic diagram of the insulating frame structure in Example 27. [Figure 67] This is a schematic diagram of the partial structure of the high-capacity battery in Example 27. [Figure 68] This is a cross-sectional view of the high-capacity battery of Example 27. [Figure 69] This is a cross-sectional view of the pole adapter in Example 28. [Figure 70] This is a cross-sectional view of the high-capacity battery in Example 29. [Figure 71] This is a schematic diagram of the structure of the electrical connection member in Example 30. [Figure 72] This is a cross-sectional view of the pole adapter in Example 30. [Figure 73] This is a cross-sectional view of the high-capacity battery of Example 31. [Figure 74] This is a schematic diagram of the insulating frame structure in Example 32. [Figure 75] This is a schematic diagram of the partial structure of the high-capacity battery in Example 32. [Figure 76] This is a cross-sectional view of the high-capacity battery of Example 32. [Figure 77] This is a schematic diagram of the structure of the electrical connection member in Example 33. [Figure 78] This is a cross-sectional view of the high-capacity battery of Example 34. [Figure 79] This is an exploded view of the polarity terminal (the polarity terminal is a single cell electrode adapter) in Embodiment 35 of the present invention. [Figure 80] This is a schematic diagram of the structure of a large-capacity battery in Example 36 of the present invention. [Figure 81] This is a schematic diagram of the structure of a large-capacity battery in Example 36 of the present invention. [Modes for carrying out the invention]

[0047] To make the above-mentioned objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application will be described in detail below in accordance with the drawings of the specification. Clearly, the embodiments described are only a part of the embodiments of this application, not all of them. All other embodiments that a person skilled in the art could obtain without creative effort based on the embodiments of this application should all fall within the scope of protection of this application.

[0048] Many specific details will be provided in the following description in order to fully understand the present application, but the present application may also be implemented in other forms different from those described herein, and those skilled in the art may extend similar applications without contradicting the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0049] Furthermore, in the description of this application, the directions or positional relationships indicated by terms such as "peak" and "base" are directions or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description of this application. They do not indicate or imply that the shown devices or elements necessarily have a specific direction, or that they are configured and operated in a specific direction, and therefore should not be understood as limiting this application. In addition, terms such as "first," "second," "third," and "fourth" are merely for explanatory purposes and should not be understood as indicating or implying relative importance.

[0050] Examples 1 to 3 provide pole pole adapters, and large-capacity batteries and energy storage devices having said pole pole adapters.

[0051] In Examples 1 to 3, a single cell is a commercially available or commercially available prismatic lithium battery, or a roughly prismatic battery constructed by connecting multiple pouch cells in parallel and then placing them in a single prismatic aluminum case. The heat transfer tube may be a water-cooled tube, a copper tube, a copper busbar, or a thermotube. A thermotube is an evaporation-condensation type heat exchanger that achieves heat transfer through a change in the state of the working material inside the tube. When one end of the thermotube receives heat, the working material inside the tube vaporizes, and after vaporization, the steam flows to the other end. When it encounters cold air, it condenses and releases latent heat into the heat dissipation region. The heat of condensation is collected by the effects of capillary force and gravity and recirculates, continuing to receive heat and vaporize. In this way, a large amount of heat is transferred from the heating region to the heat dissipation region through a back-and-forth circulation. Heat transfer is carried out by the phase change process of the working material.

[0052] To solve the problem of excessively high local temperatures at the electrode poles, the inventors attempted to achieve heat exchange by directly creating grooves in each individual electrode pole of a large-capacity battery and attaching heat transfer tubes to them. However, this method has the following problems.

[0053] 1. Directly machining grooves into the electrode columns of a single cell would have a certain impact on the performance of the single cell, and the machining difficulty would be relatively high. Secondly, if a single cell with grooves on the electrode post is customized before assembly, current battery manufacturers will hardly accept any orders. 3. If electrode components with grooves are produced directly in-house before assembling the single cell, the operating investment costs for the battery production line are enormous.

[0054] Based on this, the inventors changed their concept and directly added a pole adapter (i.e., a groove or through hole in the pole adapter) to clamp a heat transfer tube to the pole of the single cell.

[0055] Examples 1 to 3 provide the following design concept. By connecting the positive or negative poles of multiple single cells via a pole adapter, clamping a heat transfer tube to the pole adapter, and further controlling the local temperature of the poles in each single cell, the occurrence of thermal runaway phenomena due to excessively high pole temperatures can be significantly reduced.

[0056] (Example 1) As shown in Figures 1 and 2, the pole adapter according to this embodiment includes a single elongated member 1, which is used to connect to the positive or negative poles of multiple single cells 21 in a large-capacity battery 2, and the elongated member 1 is provided with a clamp portion 11 along the axial direction for attaching a heat transfer tube 3.

[0057] The high-capacity battery not only enables electrical connection of each individual cell using the pole adapter, but also, since a heat transfer tube is attached to the pole adapter, the heat concentrated on the pole can be transferred from the pole adapter to the heat transfer tube, and then the heat can be taken out and processed by an external temperature control device. For the same reason, if the ambient temperature is too low and there is a possibility that the individual cells may not start up properly, the external temperature control device can also raise the temperature of each individual cell using the heat transfer tube and pole adapter.

[0058] Furthermore, since the pole adapter is a single elongated member, when this elongated member connects to the poles of each cell, the temperature distribution is more uniform when raising or lowering the temperature of each cell's pole, resulting in a better temperature control effect.

[0059] The elongated member is made of a metallic material with good electrical and thermal conductivity, such as silver, copper, or aluminum. However, considering cost, thermal conductivity, and electrical conductivity, aluminum is generally chosen as the material for the elongated member.

[0060] The connection method between the elongated member 1 and the single cell 21 may be by screw connection, welding, or crimping. However, in this embodiment, considering the stability of the connection and the effect of heat conduction, it is preferable to fix the two by welding, and in particular, the efficiency of welding can be further improved by using laser welding.

[0061] The elongated member 1 may be a rectangular column, a circular column, or a semicircular column. In this embodiment, it is preferable that the elongated member is a rectangular column, from the viewpoint of material selection for the elongated member itself, ease of processing, ease of welding, and ease of heat transfer tube installation.

[0062] Here, the clamp portion 11 of the elongated member 1 can have several forms as follows. Form 1: The clamp portion 11 consists of multiple clips provided on an elongated member, and the heat transfer tube is fixed to the elongated member by the multiple clips. Embodiment 2: As shown in Figure 1, the clamp portion 11 is a through groove 26 opened in the elongated member 1. The through groove 26 extends along the axial direction of the elongated member 1 and penetrates both ends of the elongated member. The width of the through groove 26 must be such that it tightly clamps the heat transfer tube 3 within it, ensuring mounting stability and guaranteeing the heat transfer effect between the heat transfer tube 3 and the elongated member 1. (In some cases, a welding process hole can be provided in the through groove to further improve the welding effect.) Embodiment 3: As shown in Figures 3 and 4, the clamp portion 11 is a first through-hole 112 opened in the elongated member 1. The first through-hole 112 extends along the axial direction of the elongated member 1 and penetrates both ends of the elongated member 1. The diameter of the first through-hole 112 must be such that it can tightly clamp the heat transfer tube 3 within it, ensuring mounting stability and guaranteeing the heat transfer effect between the heat transfer tube 3 and the elongated member 1.

[0063] In Embodiment 3, when the elongated member 1 is connected to the poles of each cell 21 using laser welding, it is necessary to create a first through-hole 112 and a plurality of second through-holes 113 that penetrate through it in the elongated member 1. When welding, below each second through-hole 113, there is a corresponding positive or negative pole of one cell 21. The creation of these second through-holes 113 provides a transmission path to the laser spot of the laser welding, allowing the pole adapter to be welded and fixed to the positive or negative pole of each cell.

[0064] As can be seen from the above explanation, the structural design of the clamp portion 11 in Forms 2 and 3 is simpler than that of Form 1, does not require extra parts (i.e., the clip in Form 1), and the structure of the clamp portion in Forms 2 and 3 allows for a sufficiently large contact surface between the heat transfer tube 3 and the elongated member 1, resulting in a superior heat conduction effect. For this reason, in most cases, the clamp portions of Forms 2 and 3 are generally adopted.

[0065] Compared to form 3, if the length of the elongated member 1 is longer, the through groove 26 can be processed with greater precision than the first through hole 112. Furthermore, if the heat transfer tube 3 is made of a metal material such as a copper pipe or thermotube, the through groove 26 can more easily ensure that the heat transfer tube 3 and the groove wall of the through groove 26 are in close contact than the first through hole 112 (i.e., the copper pipe or thermotube is deformed by pressing from the opening of the through groove with an external jig). In addition, the through groove 26 itself can provide a laser spot transmission passage for laser welding. When using the first through hole 112, it is necessary to process multiple second through holes 112 as laser spot transmission passages, making the processing process relatively complicated. For these reasons, this embodiment selects form 2 as the clamp part.

[0066] Naturally, since form 3 has a larger heat exchange area than form 2 when using heat transfer tubes of the same diameter 3, in some embodiments, form 3 may be selected and used as the clamp portion in the elongated member.

[0067] The cross-section of the through groove 26 can be designed to be U-shaped or C-shaped. A C-shaped through groove has natural tension at the opening, making it easier to install the heat transfer tubes and is advantageous for more tight engagement of the heat transfer tubes within the through groove, thereby improving the heat conduction effect between the pole adapter and the heat transfer tubes. For this reason, in this embodiment, a C-shape is chosen for the cross-section of the through groove.

[0068] (Example 2) As shown in Figures 2 and 4, this embodiment provides a high-capacity battery, the high-capacity battery 4 includes a high-capacity battery body, a heat transfer tube 3, and a pole adapter as described in Embodiment 1, the high-capacity battery body includes a plurality of single cells 21 arranged side by side, There are two pole adapters; one pole adapter is connected to the positive terminal of all single cells 21 to form the positive pole of the high-capacity battery, and the other pole adapter is connected to the negative terminal of all single cells 21 to form the negative pole of the high-capacity battery. There are two heat transfer tubes 3, and each of the two heat transfer tubes 3 is clamped to the clamp portion 11 of the two pole adapters and used to achieve heat exchange with each cell pole, thereby enabling temperature control for each cell by an external temperature control device.

[0069] As shown in Figure 5, in some embodiments, the high-capacity battery 4 can be equipped with an electrolyte sharing function on top of Embodiment 2, thereby improving the uniformity of each cell by positioning each cell in the same electrolyte system, and further extending the service life of the high-capacity battery.

[0070] The following two types of implementations are generally adopted for the electrolyte sharing function. 1. As shown in Figure 5, each cell 21 is located in a single case 5, and an electrolyte sharing chamber 51 is provided at the bottom of the case 5, and the electrolyte sharing chamber 51 communicates with the electrolyte region in the internal chamber of each cell 21. 2. As shown in Figure 6, there is no case, and the electrolyte region in the internal chamber of each cell 21 is connected via a single elongated first hollow member 6. The first hollow member 6 may be made from a single pipe or may be constructed in a joined form, the joined structure of which is referred to Chinese Patent CN218525645U.

[0071] In some embodiments, the high-capacity battery 4 can be equipped with a gas equilibrium function in addition to that of Embodiment 2. This gas equilibrium function can connect the gas regions of each cell, thereby ensuring that each cell maintains gas equilibrium at all times during use, improving the gas uniformity of each cell, and at the same time, allowing the gas inside each cell to be periodically discharged, thereby avoiding a series of problems that affect the overall performance of the high-capacity battery, such as the swelling of the cell housing due to the inability to discharge gas.

[0072] Generally, two types of methods are employed to achieve gas equilibrium. 1. As shown in Figure 7, each cell 21 is located inside a single case 5, and a gas chamber 52 is provided at the top of the case 5, and the gas chamber 52 communicates with the gas region of the internal chamber of each cell 21. 2. As shown in Figure 8, there is no case, and the gas regions of the internal chambers of each cell 21 are connected via a single elongated second hollow member 7. The second hollow member 7 may be made from a single pipe or may be constructed in a joined form, the joined structure of which is referred to Chinese Patent CN218525645U.

[0073] In some embodiments, the high-capacity battery 4 can be equipped with an explosion dissipation function on top of Embodiment 2, which requires one explosion dissipation member, which covers the explosion dissipation port of each cell (an explosion dissipation membrane is designed over the explosion dissipation port), and if thermal runaway occurs in one cell, the exhaust gas from the thermal runaway is discharged from the explosion dissipation tube after piercing the explosion dissipation membrane, ensuring that the cell that has experienced thermal runaway exhaust gas can be rapidly exploded and dissipated, thus avoiding affecting other cells.

[0074] The following two types of implementations are generally used for explosive dissipation functions. 1. As shown in Figure 7, each cell 21 is located inside a case 5, and a gas chamber 52 is provided at the top of the case, and the gas chamber 52 covers the explosion vent of each cell 21. 2. As shown in Figure 8, there is no case 5, and each cell 21's explosion vent is covered by a single elongated second hollow member 7. The second hollow member 7 may be made from a single pipe or may be constructed in a joined form, the joined structure of which is referred to Chinese Patent CN218525645U.

[0075] In some embodiments, as shown in Figures 9 and 10, the large-capacity battery can be equipped with both an electrolyte sharing function and a gas equilibrium function simultaneously, or with both an electrolyte sharing function and an explosion dissipation function simultaneously, in addition to the battery in Embodiment 2.

[0076] (Example 3) As shown in Figure 12, this embodiment provides an energy storage device, which includes a large-capacity battery 4 and one electrical connector 8 as described in two embodiments 2, and the number of large-capacity batteries and electrical connectors can be selected as needed when actually using the device.

[0077] Two large-capacity batteries 4 are arranged side by side, and the two adjacent large-capacity batteries 4 are connected in series via a single electrical connector 8. Part of the electrical connector 8 is connected to the pole adapter, which is the positive pole of one of the large-capacity batteries, and the other part of the electrical connector 8 is connected to the pole adapter, which is the negative pole of the other large-capacity battery (see Figure 11).

[0078] The actual function of this electrical connector is to connect two high-capacity batteries in series, and therefore it has multiple structural forms.

[0079] 1. The electrical connector 8 may consist of at least one cable, each of which is electrically connected to the pole adapter via a connector terminal. In this configuration, the connection between the connector terminal and the pole adapter is relatively complex. 2. As shown in Figure 11, the electrical connector 8 includes at least one metal aluminum plate 81, and the metal aluminum plate 81 and the two adjacent pole adapters in the two large-capacity batteries 4 are an integral component. As shown in Figure 12, in this configuration, the two heat transfer members and the electrical connector 8 are manufactured as a single unit, resulting in a high degree of structural integration and a reduction in assembly steps. However, the integral component made from the two heat transfer members and the electrical connector is relatively difficult to process. 3. The electrical connector 8 includes at least one metal aluminum plate 81, and the metal aluminum plate 81 is connected to the pole adapter by screws. This form of electrical connector is relatively easy to manufacture, and when assembling, the metal aluminum plate can be fixed to both ends and the middle of the pole adapter by screws.

[0080] To make the bond between the heat transfer tube and the elongated member tighter and to gain an advantage in heat exchange, the dimensions of the metal aluminum plate in the direction of the arrangement of the two large capacity batteries in Embodiment 3 can be increased, and the metal aluminum plate 81 can be made to cover the heat transfer tube 3 provided in the through groove 26, and force can be applied to the heat transfer tube 3 using the downward pressure of the screw connection, making the bond between the heat transfer tube 3 and the elongated member 1 tighter. For this reason, Embodiment 3 is preferred as the structure of the electrical connector in this embodiment.

[0081] Examples 4 to 10 provide pole pole adapters different from those in the above examples, as well as a large-capacity battery and energy storage device having said pole pole adapter, and will be described in detail below with reference to Figures 13 to 24.

[0082] (Example 4) This embodiment is a pole adapter, and its structure, as shown in Figure 13, includes a single elongated member 1 used to connect to the positive or negative poles of multiple individual cells in a large-capacity battery, and the elongated member 1 is provided with a heat exchange passage 32. The heat exchange passage 32 is used to transmit a heat transfer medium. The pole adapter enables electrical connection of each individual cell in a large-capacity battery, and because the pole adapter is provided with a heat exchange passage 32, the heat concentrated on the poles of the individual cells can be transferred from the pole adapter to the heat transfer medium in the heat exchange passage 32, and then the heat can be removed. For the same reason, if the ambient temperature is too low and there is a possibility that the individual cells may not start up properly, the heat transfer medium and pole adapter can be used to raise the temperature of each individual cell.

[0083] Furthermore, the pole adapter is a single elongated member 1, and when the poles of each cell are connected to the elongated member 1, the temperature distribution is more uniform when raising or lowering the temperature of each cell's pole, resulting in a better temperature control effect.

[0084] As is clear from this figure, the heat exchange passage 32 in this embodiment extends along the axial direction of the elongated member 1. In other embodiments, the heat exchange passage 32 may be snake-shaped, S-shaped, or in other curved form, but the difficulty of manufacturing them is relatively greater than in this embodiment.

[0085] The elongated member 1 is made of a metal material with good electrical and thermal conductivity, such as silver, copper, or aluminum. However, considering cost, thermal conductivity, and electrical conductivity, aluminum is generally selected as the material for the elongated member 1. Since the pole adapter is directly connected to the pole of the single cell, an electrically insulating heat transfer medium such as insulating oil or fluorine solution can be used to ensure that the heat transfer medium flowing through the heat exchange passage 32 does not become charged. In this embodiment, fluorine solution is preferred because it has a relatively high thermal conductivity (usually between 0.15 and 0.4 W / (m·K)).

[0086] The connection method between the elongated member 1 and the single cell may be by screw connection (the elongated member 1 is provided with screw holes), welding, or crimping. However, in this embodiment, considering the stability of the connection and the effect of heat conduction, it is preferable to fix the two by welding, and in particular, the efficiency of welding can be further improved by using laser welding.

[0087] (Example 5) This embodiment is a pole adapter, and unlike Embodiment 4, the elongated member 1 has a plurality of uniformly spaced blind holes 24, and the bottom of each blind hole 24 is used to connect to the positive or negative pole of a single cell.

[0088] As shown in Figure 14, in order to facilitate the connection between the pole adapter and the single cell pole 08, this embodiment provides a plurality of uniformly spaced first holes in the elongated member 1. The first holes are blind holes 24, and the connection between the two may be achieved by welding the bottom of the blind holes 24 to the single cell pole 08, or by using a screw connection method. Welding is more reliable than screw connection, and therefore this embodiment chooses welding. To relieve welding stress, a through hole can be provided at the bottom of the blind hole 24 that penetrates through the blind hole 24. This can be understood as the structure of the first holes being stepped holes, where the larger hole is closer to the upper end surface of the elongated member 1, and the smaller hole is closer to the lower end surface of the elongated member 1.

[0089] Note that the blind hole 24 and the heat exchange passage 32 are separated from each other.

[0090] In this embodiment, screw holes can be provided in the pole adapter to facilitate connection with an electrical connector.

[0091] Considering that the conductivity of a hollow conductor is weaker than that of a solid conductor due to differences in the flow guide cross-section, after connecting the pole adapter to the single cell pole, this embodiment can also fix the conductive pole 23 in the first hole, as shown in Figure 15, to improve the conductivity of the pole adapter.

[0092] The first hole may be a circular hole, a square hole, or another irregularly shaped hole, and in this embodiment, a circular hole is preferred in order to conform to the shape of the single cell electrode column. The conductive column 23 is cylindrical in shape to conform to the first hole, and its outer diameter is slightly larger than the diameter of the first hole. It may be connected to the first hole by a restraint fit, and the end face of the conductive column 23 may be chamfered to facilitate fixing it inside the first hole. The height of the conductive column 23 may be the same as the depth of the first hole, or it may be slightly smaller than the depth of the first hole, and this embodiment does not limit the height of the conductive column 23. The material of the conductive column 23 is the same as the material of the elongated member 1.

[0093] (Example 6) Unlike the above embodiments, this embodiment adds an electrical connection pole 25 on top of Embodiment 4 or Embodiment 5 and connects to a single cell electrode pole via the electrical connection pole 25, in order to solve the problem that the assembly process of a large-capacity battery having mainly the following structural form is complex.

[0094] Such a large-capacity battery includes a case and multiple individual cells, the multiple individual cells arranged in parallel within the case, the case consists of a cylindrical body and end plates fixed to both ends of the cylindrical body, the cylindrical body structure can be seen in Figures 16 and 17, and pole column relief holes 04 are provided in the top plate 03 of the cylindrical body corresponding to the pole columns of each individual cell.

[0095] The cylindrical bottom plate 05 has a projection extending away from the top plate, forming a first passage as an electrolyte sharing chamber 51. The electrolyte sharing chamber 51 communicates with the electrolyte region in the internal chamber of each cell, allowing each cell to be placed in a unified electrolyte environment, ensuring uniformity of the electrolyte within each cell, and improving the performance and cycle life of the high-capacity battery.

[0096] The cylindrical top plate 03 may have a projection extending away from the bottom plate to form a second passage, which serves as a gas chamber 52. The gas chamber 52 covers the gas port at the top of each cell in the high-capacity battery. The term "gas port" here has the following two meanings. 1) The gas port is a pole relief hole that is directly opened in the top cover plate of the single cell and penetrates the internal chamber of the single cell. In this configuration, the internal chamber of the gas chamber 52 communicates with the internal chamber gas region of each cell via the gas port, and the gas chamber 52 acts as a gas-sharing chamber for each cell. Based on the gas chamber 52, the gas regions of each cell are connected, gas equilibrium can be achieved, and the sharing of gas among the cells ensures consistency among them, improving the cycle life of the high-capacity battery to some extent. Furthermore, if thermal runaway occurs in any of the cells, the exhaust gas from the internal chamber of that cell enters the gas chamber 52 and is discharged through the gas chamber 52, thereby improving the safety of the high-capacity battery. 2) The gas port is an explosion vent or explosion-proof opening installed on the top cover plate of the single cell, and the explosion vent or explosion-proof opening is provided with an explosion vent membrane.

[0097] In this case, the gas chamber 52 is used as an explosion dissipation passage, and when the explosion dissipation membrane at the gas port of any single cell is breached by the exhaust gas, the exhaust gas from the internal chamber of that single cell is discharged through the gas chamber 52, thereby improving the safety of the high-capacity battery.

[0098] The above-mentioned high-capacity battery can be manufactured by following the procedure below.

[0099] In step 1, the cylindrical body and the end plates at both ends are processed.

[0100] In step 2, capacity grading is performed to select multiple single cells that meet the requirements; a first pole relief hole is made at the bottom of the single cell housing and then sealed using a sealing component (if a gas chamber 52 is provided on the top plate 03 of the cylindrical body and the gas chamber 52 is a gas sharing chamber, it is further necessary to make a fifth pole relief hole at the top of the single cell housing and then seal it using a sealing component); the single cells having multiple sealing components are arranged inside the cylindrical body of step 1; the first pole relief hole having a sealing component corresponds to the electrolyte sharing chamber 51 (if a gas chamber 52 is provided on the top plate 03 of the cylindrical body and the gas chamber 52 is a gas sharing chamber, the sealing component It is further necessary to make the fifth pole relief hole having a sealing component correspond to the gas sharing chamber; if a gas chamber 52 is provided on the top plate 03 of the cylindrical body and the gas chamber 52 is an explosion dissipation passage, it is further necessary to make the explosion dissipation part at the top of each cell correspond to the explosion dissipation passage and ensure that after the explosion dissipation part is pierced by the exhaust gas inside, the explosion dissipation part penetrates the explosion dissipation passage); after opening the sealing component using an external force or the electrolyte itself, it is ensured that the first pole relief hole penetrates the electrolyte sharing chamber 51 (the fifth pole relief hole penetrates the gas sharing chamber); the sealing component may be the sealing component disclosed in Chinese patents CN218525645U and CN218525614U. Each cell pole extends from the corresponding pole relief hole 04 on the top plate 03 of the cylindrical body, and the pole relief hole 04 is welded to the surrounding portion of the cell pole on the cell housing to achieve sealing; in order to ensure that the cell pole 08 of each cell can extend from the pole relief hole 04 at the top of the cylindrical body, it is necessary to add support ribs between the bottom of each cell and the bottom plate 05 of the cylindrical body during the installation process.

[0101] When installing, multiple single cells having sealing components can be arranged inside the cylinder using the following method. 1) A method of selecting and using long, uniformly sized support ribs. Multiple single cells are fixed as a single unit and pushed into the internal chamber of the cylindrical body from one of its open ends. At this time, the bottom of each single cell contacts the bottom plate 05 of the cylindrical body, and the single cell poles of each cell correspond to the corresponding pole relief holes 04, but do not extend from the pole relief holes 04. Subsequently, a lifting jig is used to support the multiple single cells from the bottom, separating the bottom of each single cell from the bottom plate 05 of the cylindrical body, and allowing the single cell poles of each cell to extend from the corresponding pole relief holes 04. After that, a long, uniformly height support rib is inserted along the x-direction, and the lifting jig is removed.

[0102] Furthermore, in the z-direction, the dimensions of the elongated, uniformly height support ribs must satisfy the requirement that, after the support ribs are added between the bottom of each cell and the cylindrical bottom plate 05, the cell poles of each cell extend from the corresponding pole relief holes 04.

[0103] 2) A method of selecting multiple spacer blocks that correspond one-to-one with a single cell to form a support rib. Multiple single cells are sequentially pushed into the internal chamber of the cylindrical body from one of its open ends. After each single cell is pushed to its predetermined position, a spacer block must be inserted between its bottom and the cylindrical bottom plate 05. This ensures that the single cell poles of the cells extend completely out of the corresponding pole relief holes 04. In many cases, in this configuration, the dimensions of the spacer blocks corresponding to each single cell differ in the z-direction.

[0104] In step 3, the end plates are welded to the two opposing open ends of the cylindrical body.

[0105] In step 4, the sealing component is opened using external force or the electrolyte itself, allowing the internal chamber of the electrolyte sharing chamber 51 to penetrate the electrolyte region of the internal chamber of each cell (if a gas chamber 52 is provided on the cylindrical top plate 03, and the gas chamber 52 is a gas sharing chamber, then the internal chamber of the gas sharing chamber penetrates the gas region of the internal chamber of each cell).

[0106] In the above method, the manufacturing process is complicated because support ribs must be added during the mounting process in order to extend the single cell pole of each cell from the corresponding pole relief hole 04.

[0107] In this embodiment, by adding an electrical connection pole 25 to the pole adapter, it is not necessary for the single cell pole to extend from the corresponding pole relief hole 04. Instead, the electrical connection pole 25 of the pole adapter is extended into the pole relief hole 04 and connected to the single cell pole located inside the cylindrical body. Therefore, it is not necessary to add support ribs between the bottom of the single cell and the cylindrical bottom plate 05 during the assembly process, thereby simplifying the manufacturing process of such a large-capacity battery.

[0108] The specific structure of the electrical connection pole 25 is shown in Figures 18 to 20 (using the addition of an electrical connection pole 25 on top of Embodiment 5 as an example). In this embodiment, the electrical connection pole 25 is a cylindrical body fixed to the bottom of the elongated member 1. To facilitate connecting the pole adapter having such an electrical connection pole 25 to the single cell pole 08, the blind hole 24 extends to the electrical connection pole 25. As shown in Figure 21, in this embodiment, in step 2, each single cell is pushed into the cylindrical body, the pole relief hole 04 and the surrounding portion of the single cell pole 08 of the single cell housing are welded together to achieve sealing, and then the electrical connection pole 25 of the pole adapter is extended into the pole relief hole 04 and connected to the single cell pole 08.

[0109] (Example 7) Unlike Examples 4, 5, and 6, this embodiment provides a clamp portion for attaching a heat transfer tube to the pole adapter of the above embodiment.

[0110] As shown in Figure 22, an example is described in which the pole adapter of Embodiment 6 is provided with a clamp for attaching a heat transfer tube.

[0111] After constructing a high-capacity battery using a single cell with such a pole adapter, a heat transfer tube can be attached to the clamp portion of the pole adapter to transfer the heat concentrated on the single cell's pole 08 from the pole adapter to the heat transfer tube, and then the heat can be removed. For the same reason, if the ambient temperature is too low and the single cell may not start up properly, an external temperature control device can also raise the temperature of each single cell using the heat transfer tube.

[0112] The clamp portion may be a through hole or through groove 26 made in the elongated member 1. In either case, the through hole or through groove 26 extends along the x direction, passes through both ends of the elongated member 1, and the dimensions of the through hole or through groove 26 must be such that the heat transfer tube is tightly clamped inside, ensuring mounting stability and ensuring the heat transfer effect between the heat transfer tube and the pole adapter. When there are many grouped single cells, the heat transfer tube is easier to fix in the through groove 26 than in a through hole, and when the heat transfer tube is made of a metal material such as a copper tube or thermotube, the through groove 26 makes it easier to ensure that the heat transfer tube and the groove wall of the through groove 26 are in tight contact (i.e., the copper tube or thermotube is deformed by pressing from the opening of the through groove 26 with an external jig), and the cross-section of the through groove 26 can be designed to be U-shaped or C-shaped.

[0113] When the through groove 26 penetrates the blind hole 24, the conductive column 23 inside the blind hole 24 further improves the heat conduction effect, thereby enabling better heat exchange between the single cell electrode column 08 and the heat transfer tube.

[0114] The through groove 26 and the heat exchange passage 32 are separated from each other.

[0115] (Example 8) This embodiment is a high-capacity battery that includes a plurality of single cells and two pole adapters as described above, the plurality of single cells being arranged side by side, one pole adapter being connected to the positive poles of all the single cells, and the other pole adapter being connected to the negative poles of all the single cells.

[0116] In the case of the pole adapter in Example 7, a heat transfer tube is installed in the through groove 26. By installing the heat transfer tube in the through groove 26, the heat concentrated on the single cell pole 08 can be transferred from the pole adapter to the heat transfer tube, and then the heat can be taken to an external temperature control device for processing. By the same logic, if the ambient temperature is too low and there is a possibility that the single cell may not start up properly, the external temperature control device can also raise the temperature of each single cell using the heat transfer tube and pole adapter. Furthermore, since the pole adapter is a single elongated member 1, when the elongated member 1 connects the single cell pole 08 of each single cell, the temperature distribution is more uniform when raising or lowering the temperature of the single cell pole 08 of each single cell, resulting in a better temperature control effect.

[0117] (Example 9) This embodiment is a high-capacity battery, and its structure is as shown in Figures 23 and 24. Unlike Embodiment 8, it further includes a case, in which multiple single cells are arranged side by side within the case. A pole relief hole 04 corresponding to each single cell pole 08 is provided in the top plate (cylindrical top plate 03) of the case, and the case area corresponding to the pole relief hole 04 is fixed and sealed to the housing of the single cell. Unlike Embodiment 5, this high-capacity battery still includes two pole adapters as in the above embodiment, with one pole adapter connected to the positive pole of all single cells and the other pole adapter connected to the negative pole of all single cells.

[0118] When additional support ribs are provided between the bottom of each cell and the cylindrical bottom plate 05, and each cell pole 08 extends from the corresponding pole relief hole 04 in the case top plate, a pole adapter without an electrical connection pole 25 can be used;

[0119] If there are no support ribs between the bottom of each cell and the cylindrical bottom plate 05, and each cell pole 08 cannot extend from the corresponding pole relief hole 04 in the case top plate, a pole adapter with an electrical connection pole 25 can be used, in which case each electrical connection pole 25 extends into the pole relief hole 04 and connects to the corresponding cell pole 08.

[0120] (Example 10) This embodiment provides an energy storage device, which includes two high-capacity batteries and one electrical connector as described in Embodiment 8 or Embodiment 9, and the number of high-capacity batteries and electrical connectors can be selected as needed when actually using the device.

[0121] Two high-capacity batteries are arranged side by side, and the two adjacent high-capacity batteries are connected in series via an electrical connector. One side of the electrical connector is connected to the pole adapter, which is the positive pole of one of the high-capacity batteries, and the other side of the electrical connector is connected to the pole adapter, which is the negative pole of the other high-capacity battery.

[0122] Examples 11 to 18 provide pole-pole adapters different from those in the above examples, as well as single cells, high-capacity batteries, and energy storage devices having such pole-pole adapters, and will be described in detail below with reference to Figures 25 to 39.

[0123] (Example 11) This embodiment is a pole adapter used to connect to a single cell pole 08 (including a positive pole and a negative pole), and the pole adapter can improve the problem of excessive localized heat in the single cell pole 08.

[0124] The structure of the pole adapter connected to the positive pole or the negative pole is the same, and this embodiment uses a pole adapter connected to the positive pole as an example, and its structure is as shown in Figure 25.

[0125] As can be seen from the figure, the pole adapter body 22 in this embodiment is a single rectangular block, but in some other embodiments, the pole adapter body 22 may be cylindrical. It can be made of a metal material that has good electrical and thermal conductivity, such as silver, copper, or aluminum, but considering the cost and the effects of electrical and thermal conductivity, aluminum is generally selected as the material for the pole adapter body.

[0126] To connect it to the single cell pole 08, this embodiment provides a first hole 42 in the pole adapter body 22. The first hole 42 may be a through hole or a blind hole; if it is a through hole, it may be a threaded through hole, and it can be connected to the single cell pole 08 by screw connection; if it is a blind hole, the bottom of the blind hole and the single cell pole 08 can be welded to achieve connection, and a screw connection method can also be used, but the reliability of the connection by welding is higher than the connection by screw, therefore, in this embodiment, the first hole 42 is preferably a blind hole, and the connection by welding is selected. To relieve welding stress, a through hole can be provided at the bottom of the blind hole that penetrates the blind hole. This can be understood as the structure of the first hole 42 being a stepped hole, where the larger hole of the stepped hole is closer to the upper end surface of the pole adapter body 22, and the smaller hole is closer to the lower end surface of the pole adapter body 22.

[0127] To obtain a better heat dissipation effect, the volume of the pole adapter body 22 can be made as large as possible to increase its heat dissipation area, and as shown in Figure 26, the projection of the pole adapter body 22 on the top cover plate of the single cell 21 in this embodiment completely covers the projection of the corresponding pole on the top cover plate of the single cell 21.

[0128] Furthermore, after grouping, the distance between adjacent individual cells 21 increases, which increases the overall volume of the large-capacity battery. To avoid a decrease in the energy density of energy storage devices constructed with such large-capacity batteries, the volume of the pole adapter body 22 should not be too large.

[0129] Considering that the conductivity of a hollow conductor is weaker than that of a solid conductor due to the difference in the flow guide cross-section, after connecting the pole adapter body 22 to the pole, this embodiment fixes the conductive pole 23 in the first hole 42, as shown in Figures 27 and 28, in order to improve the conductivity of the pole adapter.

[0130] The first hole 42 may be a circular hole, a square hole, or another irregularly shaped hole, and in this embodiment, a circular hole is preferred in order to conform to the shape of the pole post. The conductive pole 23 is cylindrical in shape to conform to the first hole 42, and its outer diameter is slightly larger than the diameter of the first hole 42. It may be connected to the first hole 42 by a interference fit, and the end face of the conductive pole 23 may be chamfered to facilitate fixing it inside the first hole 42. The height of the conductive pole 23 may be the same as the depth of the first hole 42, or it may be slightly smaller than the depth of the first hole 42, and this embodiment does not limit the height of the conductive pole 23. The material of the conductive pole 23 is the same as the material of the pole post adapter body 22.

[0131] In this embodiment, screw holes 46 may be provided in the pole adapter body 22, allowing the electrical connector and pole adapter to be connected by screws when constructing energy storage equipment. To improve the reliability of the connection, four screw holes 46 are uniformly distributed in the area of ​​the pole adapter body 22 around the blind holes.

[0132] (Example 12) As shown in Figure 29, unlike the above embodiment, this embodiment is provided with a clamp portion for attaching the heat transfer tube 3 to the pole adapter body 22 of Embodiment 11. After constructing a high-capacity battery using single cells 21 having such pole adapters, attaching the heat transfer tube 3 to the clamp portion of the pole adapter allows the heat concentrated on the poles to be transferred from the pole adapter to the heat transfer tube 3, and then the heat can be removed. By the same logic, if the ambient temperature is too low and there is a possibility that the single cells 21 may not start up properly, the external temperature control device can also raise the temperature of each single cell 21 using the heat transfer tube 3.

[0133] The clamp portion may be a through hole or through groove 26 provided in the pole adapter body 22. The dimensions of the through hole or through groove 26 must be such that the heat transfer tube 3 is tightly clamped within it, in order to ensure mounting stability and to ensure the heat transfer effect between the heat transfer tube 3 and the pole adapter. When there are many grouped single cells 21, the heat transfer tube 3 is easier to fix in the through groove 26 than in a through hole, and when the heat transfer tube 3 is made of a metal material such as a copper pipe or thermotube, the through groove 26 makes it easier to ensure that the heat transfer tube 3 and the groove wall of the through groove 26 are in tight contact (i.e., the copper pipe or thermotube is deformed by pressing from the opening of the through groove 26 with an external jig), and the cross-section of the through groove 26 can be designed to be U-shaped or C-shaped.

[0134] When the through groove 26 penetrates the first hole 42, the conductive column 23 inside the first hole 42 further improves the heat conduction effect, thereby enabling better heat exchange between the pole column and the heat transfer tube 3.

[0135] (Example 13) As shown in Figures 30 and 31, unlike the above embodiment, the pole adapter in this embodiment is a single elongated rectangular block, and the rectangular block is provided with a plurality of blind holes, the bottom of each blind hole is used to connect to a single cell pole 08. The material of the pole adapter is aluminum, which has relatively good conductivity and thermal conductivity. The connection between the bottom of each blind hole and the single cell pole 08 is achieved by welding, and to relieve welding stress, a through hole can be made at the bottom of the blind hole that penetrates through the blind hole. By the same logic, considering that the conductivity of a hollow conductor is weaker than that of a solid conductor due to the difference in the flow guide cross-section, after connecting the pole adapter body 22 to the pole, one conductive column 23 is provided in each blind hole, and the outer wall of the conductive column 23 is in close contact with the inner wall of the blind hole.

[0136] As shown in Figure 30, this is a schematic diagram of the structure of one type of pole pole adapter in this embodiment, and this elongated pole pole adapter may be understood as a single unit formed by arranging and sequentially connecting multiple pole pole adapters from Embodiment 11 along the same direction.

[0137] As shown in Figure 31, this pole pole adapter has a through groove 26 on top of the structure shown in Figure 30, and this elongated pole pole adapter may be understood as a single unit formed by arranging and sequentially connecting multiple pole pole adapters from Embodiment 12 along the same direction.

[0138] After grouping the individual cells 21, the pole adapters in the high-capacity battery not only allow for heat dissipation but also enable electrical connection between each individual cell 21. Furthermore, when constructing an energy storage device using such high-capacity batteries, both sides of the electrical connector can be connected to the pole adapters on the positive and negative poles of adjacent high-capacity batteries, respectively, thereby enabling a series connection of two high-capacity batteries.

[0139] In Figure 31, the pole adapter is provided with a clamp portion for the heat transfer tube 3. After grouping, the heat transfer tube 3 is attached to the clamp portion of the heat transfer tube 3. This allows the heat concentrated on the poles to be transferred from the pole adapter to the heat transfer tube 3, and then the heat can be taken to an external temperature control device for processing. By the same logic, if the ambient temperature is too low and there is a possibility that the single cell 21 may not start up properly, the external temperature control device can also raise the temperature of each single cell 21 using the heat transfer tube 3 and pole adapter. Furthermore, the pole adapter is a single elongated member, and after connecting each single cell pole 08, the temperature distribution is more uniform when raising or lowering the temperature of each single cell pole 08, resulting in a better temperature control effect.

[0140] (Example 14) This embodiment is a single cell 21, whose structure is shown in Figure 26. Both the positive and negative poles of the single cell 21 are connected to pole adapters as in Embodiment 11 or 12. The specific structure of the pole adapter and the connection configuration between the pole adapter and the poles are described in the above embodiment, and redundant explanations are omitted here.

[0141] (Example 15) This embodiment is a type of high-capacity battery, comprising multiple single cells 21 as in Embodiment 14, and its structure is as shown in Figures 32, 33, and 34.

[0142] In Figure 32, the through grooves 26 of each pole adapter extend along the x-direction, and heat exchange can be achieved by fixing the heat transfer tubes 3 within the through grooves 26 of each pole adapter located on the same side. Furthermore, if the heat transfer tubes are made of metal, parallel connection of each cell can be achieved.

[0143] In Figure 33, the through grooves 26 of each pole adapter extend along the y-direction, and all pole adapters can be connected in series in a meandering arrangement by the heat transfer tubes 3. A portion of the heat transfer tubes 3 connected between the positive and negative poles of the same cell 21 requires insulation, and an insulating joint 481 or insulating tube section can be used for this portion, while the other portion of the heat transfer tubes 3 can be made of aluminum. This improves the heat exchange efficiency and enables the connection of multiple cell 21 in series.

[0144] In Figure 34, unlike the structure in Figure 33, the entire heat transfer tube 3 employs an insulating tube section, preferably an insulating tube section with good heat conduction and conductivity. Compared to Figure 33, this heat transfer tube 3 has better sealing properties.

[0145] (Example 16) This embodiment is a high-capacity battery and, unlike Embodiment 15, further includes a case. The top plate 49 of the case has through holes that allow each cell pole 08 to extend, and multiple cells 21 are arranged side by side inside the case, with the poles extending from the corresponding through holes. The case regions corresponding to the through holes are fixed and sealed to the housings of the cells 21. Its structure is shown in Figures 35 and 36.

[0146] (Example 17) This embodiment is a type of high-capacity battery. Unlike embodiments 15 and 16, each cell pole 08 is connected to a pole adapter as described in embodiment 13. As shown in Figures 37, 38, and 39, it includes two pole adapters, one of which is connected to the positive pole of all cell 21, and the other pole adapter is connected to the negative pole of all cell 21. By installing the heat transfer tube 3 in the through groove 26, the heat concentrated on the poles can be transferred from the pole adapter to the heat transfer tube 3, and then the heat can be taken to an external temperature control device for processing. By the same logic, if the ambient temperature is too low and the cell 21 may not start up properly, the external temperature control device can also raise the temperature of each cell 21 using the heat transfer tube 3 and pole adapter. Furthermore, the pole adapter is a single elongated member, and after connecting each cell pole 08, the temperature distribution is more uniform when raising or lowering the temperature of each cell pole 08, resulting in a better temperature control effect.

[0147] (Example 18) This embodiment provides an energy storage device, which includes two high-capacity batteries and electrical connectors described in Embodiments 15, 16, and 17, and the number of high-capacity batteries and electrical connectors can be selected as needed when actually using the device.

[0148] Two high-capacity batteries are arranged side by side, and the two adjacent high-capacity batteries are connected in series via an electrical connector. One side of the electrical connector is connected to the pole adapter on the positive pole of one of the high-capacity batteries, and the other side of the electrical connector is connected to the pole adapter on the negative pole of the other high-capacity battery.

[0149] Examples 19 to 24 below provide pole adapters, high-capacity batteries, and energy storage devices that differ from the above examples. These will be described in detail below with reference to the drawings.

[0150] The related technology proposes a type of high-capacity battery, as shown in Figure 40, which includes a case and a plurality of individual cells 21. The case consists of a cylindrical body surrounded by two end plates 07. The plurality of individual cells 21 are arranged in parallel inside the cylindrical body. The top plate 03 of the cylindrical body has pole relief holes 04 corresponding to each individual cell pole 08, allowing the individual cell poles 08 to extend from the case. Each individual cell pole 08 extends from the pole relief hole 04, and the case region corresponding to the pole relief hole 04 is fixed and sealed to the housing of the individual cell 21. The cylindrical body can also employ a structure as shown in Figures 41 and 42.

[0151] An electrolyte sharing chamber 51 is provided on the cylindrical bottom plate 05. The electrolyte sharing chamber 51 communicates with the electrolyte region in the internal chamber of each cell 21. The electrolyte sharing chamber 51 allows each cell 21 to be placed in a unified electrolyte environment, ensuring uniformity of the electrolyte within each cell 21 and improving the performance and cycle life of the high-capacity battery.

[0152] A gas chamber 52 may be provided on the top plate 03 of the cylindrical body. The gas chamber 52 can communicate with the gas region of the internal chamber of each cell 21, achieving gas equilibrium in each cell 21 and further improving the performance and cycle life of the high-capacity battery. The gas chamber 52 may also serve as an explosion relief passage. If thermal runaway occurs in any of the cell 21, the exhaust gas from the thermal runaway in the internal chamber of that cell 21 enters the gas chamber 52, breaks through an explosion relief mechanism provided at one end of the gas chamber 52, and is discharged.

[0153] In order to ensure that each cell pole 08 can extend from the pole relief hole 04 of the cylindrical top plate 03, the manufacturing process of such a large-capacity battery is complicated because, during the installation process, after pushing multiple cell poles 21 into the cylindrical body from one of the open ends, it is necessary to add support ribs between the bottom of each cell pole 21 and the cylindrical bottom plate 05.

[0154] Examples 19 to 24 not only solve the problem of excessive localized heat in the poles by optimizing the pole adapter, but also solve the problem of the complexity of the manufacturing process for the associated high-capacity batteries.

[0155] (Example 19) This embodiment is a type of pole adapter used to connect to a single cell pole 08 (including the positive and negative poles). The structure of a pole adapter connected to either the positive or negative pole is the same, and this embodiment uses a pole adapter connected to the positive pole as an example, the structure of which is shown in Figures 43 and 44.

[0156] As can be seen from the figure, the pole adapter of this embodiment includes a pole adapter body 22 and an electrical connection pole 25. The electrical connection pole 25 is a protruding portion that extends from the pole adapter body 22.

[0157] This embodiment proposes the above-mentioned pole adapter, which not only increases the heat dissipation area of ​​the pole and solves the problem of excessive localized heat on the pole, but also solves the problem of the complex manufacturing process of the related high-capacity battery.

[0158] The related high-capacity batteries are generally manufactured using the following procedure.

[0159] In step 1, the cylindrical body and the end plates 07 at both ends are processed.

[0160] In step 2, capacity grading is performed to select multiple single cells 21 that meet the requirements; a third through hole is made in the bottom of the housing of the single cell 21 and then sealed using a sealing component (if a gas chamber 52 is provided in the top plate 03 of the cylindrical body and the gas chamber 52 is a gas sharing chamber, it is further necessary to make a fourth through hole in the top of the housing of the single cell 21 and then seal it using a sealing component); the single cells 21 having multiple sealing components are arranged inside the cylindrical body of step 1, and the third through hole having the sealing component corresponds to the electrolyte sharing chamber 51 (if a gas chamber 52 is provided in the top plate 03 of the cylindrical body and the gas chamber 52 is a gas sharing chamber, It is further necessary to make the fourth through-hole having a sealing component correspond to the gas sharing chamber; if a gas chamber 52 is provided in the cylindrical top plate 03 and the gas chamber 52 is an explosion dissipation passage, it is further necessary to make the explosion dissipation portion at the top of each cell 21 correspond to the explosion dissipation passage, and to ensure that after the explosion dissipation portion is pierced by the internal exhaust gas, the explosion dissipation portion penetrates the explosion dissipation passage), and after opening the sealing component using external force or the electrolyte itself, it is necessary to ensure that the third through-hole penetrates the electrolyte sharing chamber 51 (the fourth through-hole penetrates the gas sharing chamber); the sealing component may be the sealing component disclosed in Chinese patents CN218525645U and CN218525614U. Each cell pole 08 extends from the corresponding pole relief hole 04 on the top plate 03 of the cylindrical body; in order to ensure that the cell pole 08 of each cell can extend from the pole relief hole 04 at the top of the cylindrical body, it is necessary to add support ribs between the bottom of each cell 21 and the bottom plate 05 of the cylindrical body during the installation process; When installing, multiple single cells 21 having sealing components can be arranged inside the cylindrical body in the following manner.

[0161] 1) A method of selecting long, uniformly sized support ribs. Multiple single cells 21 are fixed as a single unit and pushed into the internal chamber of the cylindrical body from one of its open ends. At this time, the bottom of each single cell 21 is in contact with the cylindrical bottom plate 05, and each cell pole 08 corresponds to a corresponding pole relief hole 04, but does not extend from the pole relief hole 04. Subsequently, a lifting jig is used to support the multiple single cells 21 from the bottom, detaching the bottom of each single cell 21 from the cylindrical bottom plate 05, and allowing each cell pole 08 to extend from the corresponding pole relief hole 04. After that, a long, uniformly height support rib is inserted along the x-direction, and the lifting jig is removed.

[0162] Furthermore, in the z-direction, the dimensions of the elongated, uniformly height support ribs must satisfy the requirement that, after the support ribs are added between the bottom of each cell 21 and the cylindrical bottom plate 05, each cell pole 08 extends from the corresponding pole relief hole 04.

[0163] 2) A method of selecting multiple spacer blocks that correspond one-to-one with a single cell 21 to form a support rib. Multiple single cells 21 are sequentially pushed into the cylindrical body from one of its open ends, and after each single cell 21 is pushed to its predetermined position, each spacer block is inserted between its bottom and the cylindrical bottom plate 05, ensuring that the single cell pole 08 fully extends from the corresponding pole relief hole 04. In many cases, in this method, the dimensions of the spacer blocks corresponding to each single cell 21 differ in the z-direction.

[0164] In step 3, the end plate 07 is welded to the two opposing open ends of the cylindrical body, and the pole relief hole 04 is welded to the surrounding area of ​​the pole of the single cell 21 housing to achieve sealing.

[0165] In step 4, the sealing component is opened using external force or the electrolyte itself, allowing the internal chamber of the electrolyte sharing chamber 51 to penetrate the electrolyte region of the internal chamber of each cell 21 (if a gas chamber 52 is provided on the cylindrical top plate 03 and the gas chamber 52 is a gas sharing chamber, the internal chamber of the gas sharing chamber to penetrate the gas region of the internal chamber of each cell 21).

[0166] In the above method, the manufacturing process is complicated because support ribs must be added during the mounting process in order to extend each cell pole 08 from the corresponding pole relief hole 04.

[0167] In this embodiment, by adding an electrical connection pole 25 to the pole adapter body 22, it is not necessary for the single cell pole 08 to extend from the corresponding pole relief hole 04. Instead, the electrical connection pole 25 of the pole adapter is extended into the pole relief hole 04 and connected to the single cell pole 08 located inside the cylindrical body. Therefore, it is not necessary to add support ribs between the bottom of the single cell 21 and the cylindrical bottom plate 05 during the assembly process, thus simplifying the manufacturing process of such a large-capacity battery.

[0168] As shown in Figure 45, in this embodiment, in step 2 above, each single cell 21 is pushed into the cylindrical body, and the electrical connection pole 25 of the pole pole adapter is extended into the pole pole relief hole 04 and connected to the pole pole.

[0169] As can be seen from Figures 43 to 45, the pole adapter body 22 in this embodiment is a single rectangular block, but in some other embodiments, the pole adapter body 22 may be cylindrical. It can be made of a metal material that has good electrical and thermal conductivity, such as silver, copper, or aluminum, but considering the cost and the effects of electrical and thermal conductivity, aluminum is generally selected as the material for the pole adapter.

[0170] In this embodiment, the electrical connection pole 25 is a cylindrical body fixed to the bottom of the pole adapter body 22, and the cross-section of the cylindrical body matches the cross-section of the single cell pole 08, and is connected to the single cell pole 08 via the electrical connection pole 25. In other embodiments, the electrical connection pole 25 can be a column with a cross-sectional area smaller than that of the single cell pole 08, however, the reliability of the connection with the single cell pole 08 is worse than in this embodiment.

[0171] To facilitate the connection between the electrical connection pole 25 and the single cell pole 08, as shown in Figures 45 and 46, this embodiment provides a first hole in the pole adapter body 22. The first hole may be a through hole or a blind hole; if it is a through hole, it may be a threaded through hole, and a screw connection method is used to connect it to the single cell pole 08; if it is a blind hole, the bottom of the blind hole 24 and the single cell pole 08 can be welded to achieve the connection. A screw connection method may be used for connection, but welding is more reliable than screw connection, and therefore, in this embodiment, the first hole is preferably a blind hole, and welding is selected. To relieve welding stress, a through hole can be provided at the bottom of the blind hole 24 that penetrates the blind hole 24. This can be understood as the structure of the first hole being a stepped hole, and as shown in Figure 47, the larger hole of the stepped hole is closer to the upper end surface of the pole adapter body 22, and the smaller hole is closer to the lower end surface of the pole adapter body 22.

[0172] Furthermore, after grouping, the distance between adjacent individual cells 21 increases, which increases the overall volume of the large-capacity battery. To avoid a decrease in the energy density of energy storage devices constructed with such large-capacity batteries, the volume of the pole adapter body 22 should not be too large.

[0173] Considering that the conductivity of a hollow conductor is weaker than that of a solid conductor due to differences in the flow guide cross-section, this embodiment fixes the conductive column 23 in the first hole, as shown in Figures 48 and 49, after connecting the pole column adapter body 22 to the pole column, in order to improve the conductivity of the pole column adapter.

[0174] The first hole may be a circular hole, a square hole, or another irregularly shaped hole, and in this embodiment, a circular hole is preferred in order to conform to the shape of the pole post. The conductive pole 23 is cylindrical in shape to conform to the first hole, and its outer diameter is slightly larger than the diameter of the first hole. It may be connected to the first hole by a interference fit, and the end face of the conductive pole 23 may be chamfered to facilitate fixing it inside the first hole. The height of the conductive pole 23 may be the same as the depth of the first hole, or it may be slightly smaller than the depth of the first hole, and this embodiment does not limit the height of the conductive pole 23. The material of the conductive pole 23 is the same as the material of the pole post adapter body 22.

[0175] (Example 20) As shown in Figure 50, unlike the above embodiment 19, this embodiment is provided with a clamp portion for attaching a heat transfer tube to the pole adapter body 22 of embodiment 19. After constructing a high-capacity battery using a single cell 21 having such a pole adapter, attaching a heat transfer tube to the clamp portion of the pole adapter allows the heat concentrated on the pole to be transferred from the pole adapter to the heat transfer tube, and then the heat can be removed. By the same logic, if the ambient temperature is too low and the single cell 21 may not be able to start up properly, the external temperature control device can also raise the temperature of each single cell 21 using the heat transfer tube.

[0176] The clamp portion may be a through hole or through groove 26 provided in the pole adapter body 22. Both the through hole or through groove 26 extend along the x-direction, pass through both ends of the pole adapter body 22, and the dimensions of the through hole or through groove 26 must ensure that the heat transfer tube is tightly clamped within it, in order to ensure mounting stability and heat transfer effect between the heat transfer tube and the pole adapter. When there are many grouped single cells 21, the heat transfer tube is easier to fix in the through groove 26 than in a through hole, and when the heat transfer tube is made of a metal material such as a copper tube or thermotube, the through groove 26 makes it easier to ensure that the heat transfer tube is in tight contact with the groove wall of the through groove 26 than in a through hole (i.e., the copper tube or thermotube is deformed by pressing from the opening of the through groove 26 with an external jig), and the cross-section of the through groove 26 can be designed to be U-shaped or C-shaped.

[0177] When the through groove 26 penetrates the first hole, the conductive column 23 inside the first hole further improves the heat conduction effect, thereby enabling better heat exchange between the pole column and the heat transfer tube.

[0178] (Example 21) Unlike the above embodiment, the pole adapter in this embodiment is a single elongated rectangular block, and multiple electrical connection poles 25 are provided on this elongated rectangular block, and each electrical connection pole 25 is used to connect to the positive or negative pole of all single cells 21 in a large-capacity battery. The elongated rectangular block may have blind holes 24 that correspond one-to-one with the electrical connection poles 25 and extend to the electrical connection poles 25. One conductive pole 23 is provided in each blind hole 24, and the outer wall of the conductive pole 23 is in close contact with the inner wall of the blind hole 24.

[0179] As shown in Figures 51, 52, and 53, these are schematic diagrams of the structures of the two types of pole pole adapters in this embodiment. The elongated pole pole adapter may be understood as a single integrated component formed by arranging and sequentially connecting multiple pole pole adapters from Embodiment 19 along the same direction.

[0180] As shown in Figure 54, this is another schematic diagram of the pole adapter of this embodiment, and this elongated pole adapter may be understood as a single unit formed by arranging and sequentially connecting multiple pole adapters from Embodiment 20 along the same direction.

[0181] After grouping the individual cells 21, the high-capacity battery can be connected to an electrical connector using the pole adapter, and further, the electrical connection of each individual cell 21 can be achieved. In addition, the pole adapter in Figure 54 is provided with a clamp portion for a heat transfer tube. After grouping, if the heat transfer tube is attached to the clamp portion, the heat concentrated on the pole can be transferred from the pole adapter to the heat transfer tube, and then the heat can be taken to an external temperature control device for processing. By the same logic, if the ambient temperature is too low and the individual cells 21 may not start up properly, the external temperature control device can also raise the temperature of each individual cell 21 using the heat transfer tube and pole adapter. Furthermore, the pole adapter is a single elongated member, and after connecting each individual cell pole 08, the temperature distribution is more uniform when raising or lowering the temperature of each individual cell pole 08, resulting in a better temperature control effect.

[0182] (Example 22) This embodiment is a high-capacity battery, as shown in Figures 55 and 56, comprising a case, 10 single cells 21 arranged inside the case, and 20 pole adapters as in Embodiment 19 or Embodiment 2. In some other embodiments, the number of single cells 21 can be adjusted as needed, and the number of corresponding pole adapters must also be adjusted accordingly, and the positive and negative poles of each single cell 21 must each be connected to one pole adapter.

[0183] Here, the case consists of a cylindrical body and end plates 07 fixed to both ends of it; A pole relief hole 04 corresponding to each cell pole 08 is provided in the cylindrical top plate 03, and the case area corresponding to the pole relief hole 04 is fixed and sealed to the housing of the cell 21. Each cell pole 08 is located inside the cylinder, and each electrical connection pole 25 in the pole adapter extends into the pole relief hole 04 and is connected to the corresponding cell pole 08.

[0184] (Example 23) This embodiment is a type of high-capacity battery, as shown in Figures 57 and 58, comprising a case, 10 single cells 21 arranged inside the case, and pole adapters in two embodiments 21, the number of single cells 21 can be adjusted as needed in several other embodiments.

[0185] Here, the case consists of a cylindrical body and end plates 07 fixed to both ends of it; A pole relief hole 04 corresponding to each cell pole 08 is provided in the cylindrical top plate 03, and the case area corresponding to the pole relief hole 04 is fixed and sealed to the housing of the cell 21; One pole adapter is connected to the positive pole of all the cell 21, and the other pole adapter is connected to the negative pole of all the cell 21. By installing heat transfer tubes in the through grooves 26 of the high-capacity battery shown in Figure 58, the heat concentrated on the poles can be transferred from the pole adapters to the heat transfer tubes, and then the heat can be taken to an external temperature control device for processing. By the same logic, if the ambient temperature is too low and the cell 21 may not be able to start up properly, the external temperature control device can also raise the temperature of each cell 21 using the heat transfer tubes and pole adapters. Furthermore, since the pole adapter is a single elongated member, the temperature distribution is more uniform when raising or lowering the temperature of each cell pole 08 after connecting the elongated member to each cell pole 08, resulting in a better temperature control effect.

[0186] (Example 24) This embodiment provides an energy storage device, which includes a high-capacity battery and electrical connector as described in two embodiments, 22 or 23, and the number of high-capacity batteries and electrical connectors can be selected as needed when actually using the device.

[0187] Two high-capacity batteries are arranged side by side, and the two adjacent high-capacity batteries are connected in series via an electrical connector. One side of the electrical connector is connected to a pole adapter connected to the positive pole of one of the high-capacity batteries, and the other side of the electrical connector is connected to a pole adapter connected to the negative pole of the other high-capacity battery. Screw holes can be provided in the pole adapter body 22 to facilitate connection to the electrical connector.

[0188] Examples 22 to 34 below provide pole pole adapters different from the above examples, solving the problem of excessively high pole pole temperatures in the background art and preventing the insulating sealing adhesive from overflowing from some adhesive injection areas. These will be described in detail below with reference to Figures 59 to 78.

[0189] The related technology proposes a type of high-capacity battery, as shown in Figures 59 and 60, which includes a case 5 and a plurality of single cells 21, the plurality of single cells 21 arranged in parallel within the case 5, pole relief holes 04 provided in the top plate 49 of the case corresponding to each single cell pole 08, each single cell pole 08 connected to a pole adapter body 22 via the pole relief holes 04, and the area of ​​the case 5 corresponding to the pole relief holes 04 is fixed and sealed to the housing of the single cells 21. As shown in Figure 60, sealing can generally be achieved by adding a sealing connector 513 between the pole relief hole 04 and the top cover plate of the cell 21. The sealing connector 513 includes a hollow member, the bottom of which is used to seally connect to a first region of the cell 21, and the top of which is sealed to a second region of the case 5. The first region is the region located around one of the poles on the top cover plate of one of the cell 21, and the second region is the region corresponding to one of the pole relief holes 04 located in the case 5. The region corresponding to the pole relief hole 04 is the peripheral region on the outer surface of the case 5 corresponding to one of the pole relief holes 04, or the region corresponding to the pole relief hole 04 is the hole wall of the pole relief hole 04. Here, the region around the pole is the region around the insulating gasket on the pole. The insulating gasket is a component for insulating the space between the pole and the top cover plate in the cell 21. If the dimensions of each grouped cell 21 in the z direction are relatively consistent, sealing can be achieved by directly welding the area of ​​the case 5 corresponding to the pole relief hole 04 to the upper cover plate area around the cell pole 08.

[0190] A shared electrolyte chamber 51 is provided on the bottom plate of case 5. The shared electrolyte chamber 51 communicates with the electrolyte region inside each cell 21, and the shared electrolyte chamber 51 allows each cell 21 to be placed in a unified electrolyte environment, ensuring uniformity of the electrolyte within each cell 21 and improving the performance and cycle life of the high-capacity battery.

[0191] A gas chamber 9 may be provided on the top panel 49 of the case. The gas chamber 9 can communicate with the gas region of the internal chamber of each cell 21, achieving gas equilibrium in each cell 21 and further improving the performance and cycle life of the high-capacity battery. The gas chamber 9 may also serve as an explosion relief passage. If thermal runaway occurs in any one of the cell 21, the exhaust gas from the thermal runaway in the internal chamber of that cell 21 enters the gas chamber 9, breaks through the explosion relief mechanism provided at one end of the gas chamber 9, and is discharged.

[0192] The above-mentioned high-capacity battery generates heat during use, and if heat dissipation is insufficient, the battery life will be significantly shortened, leading to severe energy loss and increasing security risks such as spontaneous combustion. Therefore, in order to improve the heat dissipation efficiency of the above-mentioned high-capacity battery, a liquid cooling tube can be fixed to the pole adapter body 22, and heat dissipation is achieved by a primary heat exchange method.

[0193] However, during prolonged use, condensation may form on the surface due to the temperature difference between the inside and outside of the liquid cooling tube. When a certain amount of condensation accumulates, it may seep into the gap between the pole adapter body 22 and the case top plate 49. If a sealing connector 513 is provided, it may also seep into the space between the sealing connector 513 and the pole or pole adapter body 22, potentially causing electrical conductivity between the pole adapter body 22 and the case 5, and further potentially causing a short circuit in the same single cell 21.

[0194] To solve the above problem, it is possible to choose to lay an insulating sealing adhesive on the top plate 49 of the case, which is thicker than the pole adapter body 22, and use the insulating sealing adhesive to encase the entire pole adapter body 22, that is, to fill all the gaps between the pole adapter body 22 and the top plate 49 of the case with insulating sealing adhesive, thereby ensuring that condensation does not enter the gap between the pole adapter body 22 and the top plate 49, and thus such a large-capacity battery has higher safety.

[0195] However, after completely encasing the pole adapter body 22 using insulating sealing adhesive, the question of how to achieve electrical connection with external equipment remains a problem to be solved. Furthermore, during the adhesive injection process, the insulating sealing adhesive tends to overflow from the top surface 36 of the pole adapter and flow onto the outer wall of the case 5. While it is natural to use an adhesive injection mold, the mold needs to be demolded after the adhesive is injected, making the process complex. Moreover, the demolding process may damage the structure of the insulating sealing adhesive layer, leading to a decrease in the reliability of the seal.

[0196] Therefore, in order to improve the insulating seal of the top of the high-capacity battery and prevent condensation generated in the liquid cooling tube from entering the inside of the battery and causing a short circuit, Examples 25 to 34 all consider injecting insulating sealing adhesive into the entire pole adapter of the high-capacity battery.

[0197] The following two issues need to be given particular attention. 1. Problems with the electrical connection of the pole adapter. 2. The problem of adhesive overflowing onto the top surface of the pole adapter during the adhesive injection process. Problem 1 can be resolved as follows. The structure of the pole adapter is optimized, and an electrical connection member is added to the pole adapter for connection to an electrical connector, while ensuring that no adhesive is injected into the electrical connection member. Here, the electrical connector is a connection device that realizes the series connection of two large-capacity batteries, and may also be a connection device that connects the large-capacity batteries to an external load.

[0198] Problem 2 can be resolved as follows.

[0199] An adhesive fastening structure may be added to the pole adapter, and this adhesive fastening structure may be part of the electrical connection component.

[0200] Based on the above analysis, Examples 25 to 34 improve upon the pole adapter and will be described in detail below with reference to the drawings and specific embodiments.

[0201] (Example 25) This embodiment is a type of pole adapter, and as shown in Figure 61, its structure includes a pole adapter body 22 and an electrical connection member 34. The pole adapter body 22 is used to connect to each single cell pole 08, the top surface 36 of the pole adapter is a surface for laying insulating sealing adhesive, and the electrical connection member 34 is used to connect to an external electrical connector and to prevent the insulating sealing adhesive from overflowing from the top surface 36 of the pole adapter.

[0202] Here, the structure of the pole adapter is as shown in Figures 61 and 62, and the pole adapter of this embodiment includes a pole adapter body 22 and an electrical connection pole 25 provided on the pole adapter body 22. The pole adapter body is a single rectangular block, although in some other embodiments, the pole adapter body may be cylindrical. It can be made of a metal material with good electrical and thermal conductivity, such as silver, copper, or aluminum. However, considering the cost and the effects of electrical and thermal conductivity, aluminum is generally chosen as the material for the pole adapter body.

[0203] In this embodiment, the electrical connection pole 25 is a cylindrical body fixed to the bottom of the pole adapter body, and the cross-section of the cylindrical body matches the cross-section of the single cell pole 08, and is connected to the single cell pole 08 via the electrical connection pole 25.

[0204] To facilitate the connection between the electrical connection pole 25 and the single cell pole pole 08, this embodiment provides a first hole 42 in the pole pole adapter body. The first hole 42 may be a through hole or a blind hole. If it is a through hole, it may be a stepped through hole. A screw connection method is used to connect it to the single cell pole pole 08; if it is a blind hole, the bottom of the blind hole and the single cell pole pole 08 can be welded to achieve the connection. The reliability of the welded connection is higher than the screw connection method. Therefore, in this embodiment, the first hole 42 is preferably a blind hole, and the welded connection is selected. To relieve welding stress, a through hole 44 can be provided at the bottom of the blind hole, passing through the blind hole. This can be understood as the structure of the first hole 42 being a stepped hole. As shown in Figure 62, the larger hole of the stepped hole is closer to the top surface of the pole pole adapter body, and the smaller hole is closer to the bottom surface of the pole pole adapter body.

[0205] Considering that the conductivity of a hollow conductor is weaker than that of a solid conductor due to differences in the flow guide cross-section, this embodiment allows the conductive pole to be fixed in the first hole 42 after connecting the pole adapter to the single cell pole, thereby improving the conductivity of the pole adapter body 22.

[0206] The first hole 42 may be a circular hole, a square hole, or another irregularly shaped hole, and in this embodiment, a circular hole is preferred in order to conform to the shape of the pole post. The conductive pole is cylindrical in shape to conform to the first hole 42, and its outer diameter is slightly larger than the diameter of the first hole 42. It may be connected to the first hole 42 by a interference fit, and the end face of the conductive pole may be chamfered to facilitate fixing it inside the first hole 42. The height of the conductive pole may be the same as the depth of the first hole 42, or it may be slightly smaller than the depth of the first hole 42, and this embodiment does not limit the height of the conductive pole. The material of the conductive pole is the same as the material of the pole post adapter body.

[0207] In this embodiment, the pole adapter body 22 is provided with a clamp section for attaching a liquid cooling tube 514. After constructing a high-capacity battery using a single cell 21 having such a pole adapter body 22, attaching the liquid cooling tube 514 to the clamp section of the pole adapter body 22 allows the heat concentrated on the pole to be transferred from the pole adapter body 22 to the liquid cooling tube 514, and then the heat can be removed. By the same logic, if the ambient temperature is too low and there is a possibility that the single cell 21 may not start up properly, the external temperature control device can also raise the temperature of each single cell 21 using the liquid cooling tube 514.

[0208] The clamp portion may be a through hole or through groove made in the pole adapter body. In either case, the through hole or through groove extends along the x direction, passes through both ends of the pole adapter body, and the dimensions of the through hole or through groove must be such that the liquid cooling pipe 514 is tightly clamped within it, in order to ensure mounting stability and to ensure the heat transfer effect between the liquid cooling pipe 514 and the pole adapter body 22.

[0209] As can be seen from Figures 61 and 62, in this embodiment, the electrical connection member 34 and the pole adapter body 22 are an integrated structure, and in the x-direction, the dimensions of the electrical connection member 34 and the pole adapter body 22 are equal. The electrical connection member 34 is an inverted L-shaped plate, and the vertical plate 341 of the inverted L-shaped plate is parallel to the xz plane and is fixed to the edge extending along the x-direction of the top surface 36 of the pole adapter, preventing the insulating sealing adhesive from overflowing from the edge extending along the x-direction of the top surface 36 of the pole adapter, and the horizontal plate 342 is parallel to the xy plane and is used to connect to an external electrical connector, and in some cases the horizontal plate 342 may be used as an electrical connector directly.

[0210] (Example 26) This embodiment is a large-capacity battery having a pole adapter in Embodiment 25, and its structure is as shown in Figure 63. The adhesive can be directly injected into the pole adapter body 22, so that the insulating sealing adhesive liquid completely encases the entire pole adapter body 22. That is, an insulating sealing adhesive layer with a thickness greater than the thickness of the pole adapter body 22 (dimension in the z direction) is laid on the case top plate 49, so that the insulating sealing adhesive layer completely covers the pole adapter body 22. In addition, an insulating sealing adhesive layer is provided in the first gap (region a) between the bottom surface 35 of the pole adapter and the case top plate 49, and it may also be understood that insulating sealing adhesive layers are provided on the top surface 36 of the pole adapter and the side surfaces 37 of each pole adapter. Here, the bottom surface 35 of the pole pole adapter is a surface on the pole pole adapter body 22 that is parallel to and close to the case top plate 49, the top surface 36 of the pole pole adapter is a surface on the pole pole adapter body 22 that is parallel to and away from the case top plate 49, and the side surface 37 of the pole pole adapter is a surface on the pole pole adapter body 22 that is perpendicular to both the bottom surface 35 and the top surface 36 of the pole pole adapter.

[0211] Furthermore, during the adhesive injection process, it is necessary to ensure that the lateral plate 342 of the electrical connection member 34 extends beyond the insulating sealing adhesive layer, that is, that there is no insulating sealing adhesive on the lateral plate 342. The lateral plate 342 is used to connect to an external electrical connector, and adjacent high-capacity batteries can be connected in series via the electrical connector. In some cases, adjacent high-capacity batteries can be connected in series by interconnecting the lateral plates 342 of their respective electrical connection members 34, using each lateral plate 342 as an electrical connector.

[0212] If a gas chamber 9 is not provided in the case top plate 49, an opening corresponding to the explosion vent of each cell 21 may be made in the case top plate 49, and the area around the opening will be sealed by the top cover plate of the cell 21. When injecting the adhesive, an adhesive stopper structure can be added above the explosion vent of each cell 21, so that the insulating sealing adhesive liquid covers the explosion vent and prevents a safety accident, and the adhesive stopper structure can be removed after the adhesive injection is complete. Also, if a gas chamber 9 is provided in the case top plate 49, the gas chamber 9 can be an adhesive stopper structure.

[0213] During the adhesive injection process, the insulating sealing adhesive liquid does not overflow from the edges of the pole adapter body 22 parallel to the x-direction due to the shut-off of the vertical plate 341 of the electrical connection member 34 and the gas chamber 9. However, it may overflow from the edges parallel to the y-direction and also from the case top plate 49. Therefore, it is necessary to install an additional adhesive injection mold. This prevents the insulating sealing adhesive from overflowing from the edges parallel to the y-direction and the case top plate 49. After completing the adhesive injection, the adhesive injection mold can be removed.

[0214] (Example 27) Unlike Example 26, this embodiment adds an insulating protective cover 10 to the top of the high-capacity battery, thereby avoiding potential security risks associated with the exposure of the pole adapter body 22 during operation of the high-capacity battery, and also avoiding the problem of foreign objects from the external environment falling onto the pole adapter body 22 and causing a short circuit in the high-capacity battery, thereby improving the safety of the high-capacity battery. Furthermore, by using an adhesive injection mold for part of the structure of the insulating protective cover 10, the adhesive injection process is simplified, eliminating the need for demolding after the adhesive injection is complete, and improving the bonding strength between the insulating protective cover 10 and the top of the high-capacity battery.

[0215] The specific structure is as shown in Figures 64 and 65. The insulating protective cover 10 includes an insulating frame 104 and an insulating cover plate 105 that covers the insulating frame 104. The lower end of the insulating frame 104 is used to attach to the top of the large-capacity battery and is fixed to the top of the large-capacity battery by means of screw connection or adhesive. The insulating cover plate 105 is fitted and attached to the upper end of the insulating frame 104. A notch is provided at the upper end of the side wall (second side wall 101) of the insulating frame 104 parallel to x and z, and this notch combines with the insulating cover plate 105 to form a slit 102. A passage (not shown) for passing a liquid cooling pipe 514 is provided in the side wall (first side wall 103) of the insulating frame 104 parallel to y and z.

[0216] When assembling, first fix the insulating frame 104 to the top of the large-capacity battery, position the lateral plate 342 in the slit 102 (see Figure 65), then connect the electrical connector to the pole adapter body 22 via the slit 102 (if the lateral plate 342 extends from the slit 102, adjacent large-capacity batteries can use the lateral plate 342 of their respective electrical connection members 34 as an electrical connector, and the interconnection of the respective lateral plates 342 enables series connection of two large-capacity batteries), inject adhesive into the pole adapter body 22, and then fix the insulating cover plate 105 to the upper end of the insulating frame 104.

[0217] This embodiment optimizes the structure of the insulating frame 104, which can be used as an insulating protective housing and an adhesive injection mold, and its structure is shown in FIGS. 66, 67 and 68.

[0218] The insulating frame 104 of this embodiment includes an insulating bottom plate 108 fixed to an open end of either the second insulating side frame 107 or the second insulating side frame 107. An electrical connection post relief hole 1081 corresponding to each pole adapter body 22 is formed in the insulating bottom plate 108. The size of the electrical connection post relief hole 1081 should be such that the electrical connection post 25 on the pole adapter body 22 can pass through it, but the pole adapter body portion cannot pass through it.

[0219] Partition plates 1082 are provided around each electrical connection post relief hole 1081 to form each pole adapter accommodation chamber 109. When the insulating frame 104 is fixed to the top of the large-capacity battery, the electrical connection posts 25 of each pole adapter body 22 pass through the electrical connection post relief holes 1081 and the pole relief holes 〇4 in the case top plate 49 and are connected to each single-cell pole 08. There is a fourth gap between the side wall parallel to xz of the pole adapter accommodation chamber 109 and the side surface parallel to xz of the pole adapter body 22, which is the area shown in FIG. 67. The lateral plate 342 of the electrical connection member 34 is located in the notch of the insulating frame 104, and better electrical connection can be realized based on the electrical connector.

[0220] Inject the adhesive into the adhesive injection space through the fourth gap. In this embodiment, an insulating sealing adhesive is injected into both the top surface 36 of the pole column adapter and the pole column adapter housing chamber 109. Blocked by the vertical plate 341 of the electrical connection member 34 and the outermost partition plate 1082 (as can be seen from the figure, the height of the four partition plates 1082 located on the outermost side of the insulating bottom plate 108 is slightly higher than the height of the pole column adapter body 22, and the outermost four partition plates 1082 are respectively defined as the first partition plate 112, the second partition plate 113, the third partition plate 114, and the fourth partition plate 115), the insulating sealing adhesive liquid cannot overflow from the top surface 36 of the pole column adapter. At the same time, taking the horizontal plate 342 as the electrical connection part, in the z direction, since the horizontal plate 342 is higher than the top surface 36 of the pole column adapter, the insulating sealing adhesive liquid cannot appear on the horizontal plate 342 either, without affecting the conductivity of the pole column adapter body 22.

[0221] When the hole diameter of the electrical connection post relief hole 1081 is larger than the outer diameter of the electrical connection post 25 of the pole column adapter body 22, the insulating sealing adhesive liquid enters the region b, that is, the second gap (shown in FIG. 68) from the gap between the two. If there is a false solder connection between the electrical connection post 25 of the pole column adapter body 22 and each single cell pole column 08, when the insulating sealing adhesive enters the region b, it may affect the conductive performance of the pole column adapter body 22 and each single cell pole column 08. To avoid such problems and reduce the amount of adhesive used, an annular adhesive stop ring 110 can be added to the outer edge of the electrical connection post relief hole 1081 to prevent the insulating sealing adhesive liquid from flowing into the region b. Here, the outer edge of the electrical connection post relief hole 1081 may be the hole wall of the electrical connection post relief hole 1081 or the bottom plate region of the adhesive injection space around the electrical connection post relief hole 1081. As can be seen from the figure, the annular adhesive stop ring 110 is perpendicular to the bottom plate of the pole column adapter housing chamber 109 and protrudes in the direction of the insulating cover plate 105. Also, in order to cooperate with the annular adhesive stop ring 110, an annular concave groove 111 is opened on the bottom surface 35 of the pole column adapter, and the annular adhesive stop ring 110 can be directly inserted into the annular concave groove 111.

[0222] (Example 28) Unlike Example 25, this embodiment adds a first bearing plate 541 to the pole adapter body 22, and in the x-direction, the dimensions of the first bearing plate 541 are equal to the dimensions of the pole adapter body 22; The specific structure is shown in Figure 69. In this embodiment, a first bearing plate 541 is provided perpendicular to the side of the lateral plate 342 of the electrical connection member 34 of the pole adapter body 22 of Embodiment 25 that is parallel to the x-direction. The first bearing plate 541 works in cooperation with the insulating frame 104 to improve the structural stability of such a large-capacity battery.

[0223] (Example 29) To accommodate the pole adapter in Example 28, this embodiment improves upon the structure of the insulating frame 104 in Example 27 by adding a second pressure plate 542 that fits the first pressure plate 541 in Example 28, as shown in Figure 70. The second pressure plate 542 is provided flush with the side wall of the second insulating frame 107 parallel to the xz plane, and the second pressure plate 542 can be provided integrally with the second insulating frame 107. Once assembled, the first pressure plate 541 is firmly pressed against the second pressure plate, thereby improving the structural stability of such a large-capacity battery.

[0224] (Example 30) In this embodiment, unlike the above embodiment, the electrical connection member 34 and the pole adapter body 22 are separate components, and in the x-direction, the dimensions of the electrical connection member 34 and the pole adapter body 22 are equal. Its structure is as shown in Figures 71 and 72. The pole adapter body 22 in this embodiment is the same as in the above embodiment, and therefore, redundant explanations will be omitted here.

[0225] The electrical connection member 34 in this embodiment includes a first electrical connection plate 343, a second electrical connection plate 344, and a third connection plate 345. The third connection plate 345 is located between the first electrical connection plate 343 and the second electrical connection plate 344. The first electrical connection plate 343 is covered and fixed to the top surface 36 of the pole adapter. A liquid cooling pipe relief passage 346 is provided on the surface of the first electrical connection plate 343 that connects to the pole adapter body 22. When the two are fixed together, the first electrical connection plate 343 can further firmly hold the liquid cooling pipe 514. The second electrical connection plate 344 is used to connect to an external electrical connector (in some cases, the second electrical connection plate 344 may also serve as a direct electrical connector). The third connection plate 345 is used to prevent the insulating sealing adhesive from overflowing from some adhesive injection areas. In this embodiment, the adhesive injection area refers to the top surface of the first electrical connection plate 343. Since the electrical connection member 34 directly covers the top surface 36 of the pole adapter in this embodiment, it is necessary to lay insulating sealing adhesive on the first electrical connection plate 343 of the electrical connection member 34 when injecting the adhesive. Naturally, when laying insulating sealing adhesive on the first electrical connection plate 343, the insulating sealing adhesive may penetrate the top surface 36 of the pole adapter.

[0226] (Example 31) As shown in Figure 73, this embodiment is a type of high-capacity battery, and the pole adapter of embodiment 30 is provided in this high-capacity battery, and the same electrical connection member 34 is fixed to the pole adapter body 22 located on the same side, and in some other embodiments, one electrical connection member 34 may be fixed to each pole adapter body 22.

[0227] The adhesive can be directly injected into the pole adapter, and the insulating sealing adhesive can completely encase the first electrical connection plate 343 and the pole adapter body 22, that is, an insulating sealing adhesive layer with a thickness greater than the sum of the thicknesses (dimensions in the z direction) of the pole adapter body 22 and the first electrical connection plate 343 can be laid on the case top plate 49.

[0228] Furthermore, during the adhesive injection process, it is necessary to ensure that the second electrical connection plate 344 extends beyond the insulating sealing adhesive layer, that is, that there is no insulating sealing adhesive on the second electrical connection plate 344.

[0229] If a gas chamber 9 is not provided in the case top plate 49, an opening corresponding to the explosion vent of each cell 21 must be made in the case top plate 49, and the area around the opening is sealed by the top cover plate of the cell 21. When injecting the adhesive, an adhesive stopper structure can be added above the explosion vent of each cell 21, so that the insulating sealing adhesive liquid covers the explosion vent and prevents a safety accident, and the adhesive stopper structure can be removed after the adhesive injection is complete. Also, if a gas chamber 9 is provided in the case top plate 49, the gas chamber 9 can be an adhesive stopper structure as shown in Figure 73.

[0230] During the adhesive injection process, the third connection plate 345 of the electrical connection member 34 and the gas chamber 9 are shut off, preventing the insulating sealing adhesive from overflowing from the edge parallel to the x-direction of the first electrical connection plate 343. However, there is a possibility of overflowing from the edge parallel to the y-direction, and also from the case top plate 49. Therefore, it is necessary to install an additional adhesive injection mold to prevent the insulating sealing adhesive from overflowing from the edge parallel to the y-direction and the case top plate 49. After completing the adhesive injection, the adhesive injection mold can be removed.

[0231] (Example 32) Unlike Example 31, this embodiment adds an insulating protective cover 10 to the top of the high-capacity battery on top of Example 31. This avoids potential security risks that may exist when the pole adapter body 22 is exposed during operation of the high-capacity battery, and also avoids the problem of foreign objects from the external environment falling onto the pole adapter body 22 and causing a short circuit in the high-capacity battery, thereby improving the safety of the high-capacity battery. Furthermore, by making part of the structure of the insulating protective cover 10 an adhesive injection mold, the adhesive injection process is simplified, eliminating the need for demolding after the adhesive injection is complete, and at the same time improving the bonding strength between the insulating protective cover 10 and the top of the high-capacity battery.

[0232] The specific structure is as shown in Figures 74, 75, and 76. This embodiment has a different insulating frame 104 than Embodiment 27. The insulating frame 104 of this embodiment includes only the second insulating edge frame 107 (i.e., region f shown in Figure 74 is a perforated region, and once assembly is complete, the pole adapter body 22 and the first electrical connection plate 343 of the electrical connection member 34 are located within this region, as can be seen in Figures 75 and 76). Adhesive fastening plates 1043 are provided on the first surfaces 1042 (surfaces parallel to the xy plane) of the two long edge frames 1041 of the second insulating edge frame 107. The adhesive fastening plates 1043 extend along the x direction and have a third gap (region c shown in Figure 76) between them and the outer surface 533 of the pole adapter in the y direction. To improve the strength of the adhesive fastening plates 1043, reinforcing ribs 1044 can be added to the adhesive fastening plates 1043.

[0233] As shown in Figure 76, in order to connect the electrical connector to the pole adapter body 22, the adhesive fixing plate 1043 should have a slit 102 between it and the insulating cover plate 105. When the pole adapter body 22, to which the electrical connection member 34 is fixed, is fixed to each single cell pole 08, the second electrical connection plate 344 of the electrical connection member 34 is positioned in the slit 102, and electrical connection can be better realized based on the electrical connector.

[0234] If the case top plate 49 does not have a gas chamber 9, an adhesive stopper structure can be added above the explosion vent of each cell 21. This prevents the insulating sealing adhesive from covering the explosion vent and causing a safety accident. After the adhesive injection is complete, the adhesive stopper structure can be removed. If the case top plate 49 does have a gas chamber 9, the gas chamber 9 can be an adhesive stopper structure. Naturally, for structural regularity, as shown in Figure 76, stopper plates 106 parallel to the xz plane may be provided on both sides of the gas chamber 9, with their tips flush with the insulating cover plate 105, or they may be provided integrally with the insulating cover plate 105.

[0235] In this embodiment, insulating sealing adhesive is injected into the first electrical connection plate 343, and the insulating sealing adhesive liquid cannot overflow from the surface of the first electrical connection plate 343 due to the barrier of the third connection plate 345 of the electrical connection member 34 and the side walls of the insulating frame 104 parallel to the yz plane, and the insulating sealing adhesive liquid cannot overflow from the case top plate 49 due to the barrier of the adhesive stopper plate 1043. At the same time, the second electrical connection plate 344 is used as the electrical connection point, and in the z direction, the second electrical connection plate 344 is higher than the top surface 36 of the pole adapter, so the insulating sealing adhesive liquid does not appear on the second electrical connection plate 344 and does not affect the conductive ability of the pole adapter body 22.

[0236] (Example 33) Unlike Example 30, the structure of the electrical connection member 34 in this embodiment is as shown in Figure 77. In the embodiment 30, an L-shaped electrical connection plate 38 is added to the electrical connection member 34, and in the x-direction, the dimensions of the L-shaped electrical connection plate 38 are equal to the dimensions of the pole adapter body 22. The vertical connection plate 39 of the L-shaped electrical connection plate 38 is connected to the second electrical connection plate 344 of the electrical connection member 34, and the horizontal connection plate 40 is used to connect to an electrical connector.

[0237] (Example 34) This embodiment is a type of high-capacity battery, and unlike embodiment 32, this high-capacity battery is provided with the pole adapter described in embodiment 33. As shown in FIGS. 60 and 78, when the pole post adapter body 22 to which the electrical connection member 34 of Example 33 is fixed is fixed to each single cell pole post 08, the lateral connection plate 40 of the electrical connection member 34 is located in the slit 102, and has a larger electrical connection space compared to Example 32, and electrical connection based on the electrical connector can be better realized.

[0238] Examples 35 to 36 provide another kind of pole post adapter and a large-capacity battery having such a pole post adapter.

[0239] During the charge and discharge operation of the battery, the battery itself generates a large amount of heat. If the battery is not cooled in a timely manner, the performance of the battery will deteriorate. Currently, the liquid cooling method is mainly adopted to cool the battery. When cooling the battery by the liquid cooling method, generally a heat transfer tube is adopted to exchange heat with the battery polarity terminal. There is a heat conduction medium in the heat transfer tube. When the heat transfer tube is connected to a temperature control device, the temperature control device processes the heat transmitted from the heat transfer tube. The temperature control device mainly includes a temperature controller and a circulation pump. Among them, the temperature controller is a device having heating and / or cooling functions and is used to raise or lower the temperature of the heat conduction medium in the heat transfer tube. For example, the temperature controller is specifically an air conditioner or a refrigerator with a compressor, etc. The circulation pump is mainly used to circulate the heat conduction medium, and further quickly and effectively process the heat of the single cell to control the temperature of the single cell within an optimal range.

[0240] The above heat transfer tube is provided on the battery polarity terminal (the polarity terminal here can be understood as a single cell pole post or a pole post adapter, and in the following examples, the pole post adapter is mainly taken as an example), and is used to directly exchange heat with the battery polarity terminal. In order to ensure the heat exchange efficiency between the heat transfer tube and the battery polarity terminal, the above heat transfer tube generally adopts a metal tube with excellent heat conduction performance, and the heat conduction medium in the conductive column body is a liquid medium, such as water, ethylene glycol / water, propylene glycol / water, methanol / water, ethanol / water, calcium formate / water, etc.

[0241] When the heat transfer tube comes into contact with the battery polarity terminal, insulation must be installed between the heat transfer tube and the battery polarity terminal. If the insulation performance between the two is relatively low, attaching the heat transfer tube to the single cell polarity terminal will cause a short circuit in the single cell, creating a security risk. Based on this, Examples 35 and 36 provide a polarity terminal which is a conductive column having two layers of insulation, thereby ensuring reliable insulation performance when exchanging heat with the heat transfer tube.

[0242] (Example 35) As shown in Figure 79, this embodiment provides a type of polarity terminal, which is a pole adapter connected to a single cell pole. The polarity terminal includes a conductive pole (pole adapter body 22). The conductive pole includes an electrical connection area and a heat exchange area. The electrical connection area of ​​the conductive pole is used to realize an electrical connection between the polarity terminal and other components. The heat exchange area of ​​the conductive pole is used to realize heat exchange between the polarity terminal and a heat transfer tube. Specifically, the conductive pole is provided with a through groove 26, and the heat exchange area is the groove wall of the through groove 26. The conductive pole is provided with a through groove 26 to facilitate the installation of a heat transfer tube. Alternatively, the conductive pole is provided with a through hole, and the heat exchange area is the hole wall of the through hole. The conductive pole is provided with a through hole to make the area of ​​the heat exchange area relatively large. The through groove 26 or through hole is used to arrange a heat transfer tube, and the heat transfer tube realizes heat exchange with the polarity terminal via the heat exchange area.

[0243] The conductive column described above is specifically a columnar structure, which may be a cylindrical or rectangular column, and the design will be adapted according to the specific structure of the cell when in use. The direction in which the through-hole is opened is perpendicular to the height direction of the cell, and specifically a circular hole, an elliptical hole, etc. can be used. In this embodiment, a circular hole is preferred. The through-groove 26 is specifically provided on the side wall or end face of the conductive column, and the cross-section of the through-groove 26 can be designed to be U-shaped or C-shaped. A C-shaped through-groove 26 has natural tension at the opening, making it easy to install the heat transfer tube, and at the same time, it is advantageous for more tightly engaging and connecting the heat transfer tube within the through-groove 26, thereby improving the heat conduction effect between the polarity terminal and the heat transfer tube.

[0244] The main differences between the polar terminal in this embodiment and a conventional single-cell polar terminal are as follows. In this embodiment, there is an insulating layer 915 on the heat exchange region of the polar terminal, and an insulating sleeve 916 is provided on the heat exchange region having the insulating layer 915, thereby providing double-layer insulation between the polar terminal and the heat transfer tube. With this double-layer insulation, even if one of the insulating layer 915 or the insulating sleeve 916 is damaged when the polar terminal and the heat transfer tube 3 perform heat exchange, reliable insulation performance can be maintained between the heat transfer tube and the single-cell polar terminal, thereby improving safety during single-cell use.

[0245] The insulating layer 915 described above is formed on the groove wall of the through groove 26 of the conductive column or on the hole wall of the through hole, and this can be realized by employing one of the following methods.

[0246] Firstly, a ceramic coating, i.e., a high-temperature electrical insulating coating, is formed on the inner wall surface of the through groove 26 or through hole of the conductive column to form an insulating layer 915. The ceramic coating may specifically be boron nitride, aluminum oxide, or copper fluoride coating. However, insulating layers 915 formed in this manner are prone to falling off and have high processing costs; Secondly, an insulating layer 915 is formed by applying a single layer of insulating material (e.g., insulating varnish) to the inner wall surface of the through groove 26 or through hole of the conductive column, and the insulating layer 915 of this structure is easy to process on-site, the processing steps are simple, and it only requires processing of the heat exchange area, resulting in relatively low processing costs; Thirdly, the inner wall surface of the through groove 26 or through hole of the conductive column is oxidized to form a hard oxide layer, thereby forming an insulating layer 915. The oxidation treatment involves a chemical reaction between the metal surface and oxygen, forming a single oxide film that improves the insulating performance of the metal surface. Examples include electrochemical oxidation methods. The insulating layer 915 formed by such a method is less likely to fall off and has relatively good insulating performance. The thicker the oxide layer formed by the oxidation treatment, the better the insulating performance, but the lower its thermal conductivity. In this embodiment, the thickness of the hard oxide layer is preferably 20 μm to 50 μm. A hard oxide layer of this thickness guarantees insulating performance and provides good thermal conductivity to the heat exchange region of the conductive column.

[0247] In this embodiment, since it is necessary to ensure the conductivity of the conductive column while ensuring the insulation capacity between the conductive column and the heat transfer tube, the oxidation treatment only needs to be performed on the heat exchange region, and the treatment can be carried out as follows. 1) The parts of the conductive column that do not require insulation treatment can be covered, the parts that require insulation treatment can be exposed to the outside, and then the conductive column can be placed in the treatment solution to perform the insulation treatment. 2) The entire conductive column is placed in a processing solution to form an insulating layer 915 on the outer surface of the entire conductive column, and then the insulating layer 915 in the electrical connection area is removed using a cutting process.

[0248] To ensure the reliability of the insulation, an insulating sleeve 916 is further provided in the through groove 26 or through hole of the conductive column having the insulating layer 915, thereby forming double insulation in the heat exchange region of the conductive column. Specifically, the insulating sleeve 916 can be manufactured using an insulating material with good thermal conductivity, and thus has excellent thermal conductivity as well as good insulating performance. In this embodiment, the insulating sleeve 916 is a thermal conductive plastic sleeve or thermal conductive rubber sleeve, such as a thermal conductive silicone rubber sleeve, which has good insulating and thermal conductivity performance. At the same time, the thickness of the insulating sleeve 916 is generally 0.1 mm to 0.5 mm, and an insulating sleeve 916 of this thickness can guarantee excellent insulating performance as well as good thermal conductivity.

[0249] As shown in Figure 79, it is desirable that the cross-sectional shape of the insulating sleeve 916 is similar to the cross-sectional shape of the through groove 26 or through hole so that the insulating sleeve 916 can be tightly fitted into the through groove 26 or through hole of the conductive column and improve the thermal conductivity of the conductive column. Therefore, if it fits into the through groove 26, the insulating sleeve 916 may be a U-shaped sleeve or a C-shaped sleeve, and if it fits into the through hole, the insulating sleeve 916 may be a thin-walled circular sleeve.

[0250] When the insulating sleeve 916 is specifically fitted and attached to the conductive column, it can be installed in the through groove 26 or through hole of the conductive column having an insulating layer 915 by a heat shrinking method. With this method, there is almost no heat transfer gap between the insulating sleeve 916 and the conductive column, and the heat conduction effect of the insulating sleeve 916 is relatively good. Alternatively, the heat transfer efficiency can be improved by applying a heat conductive adhesive to the insulating sleeve 916, then fitting the insulating sleeve 916 into the through groove 26 or through hole of the conductive column, and finally firmly pressing the insulating sleeve 916 to tightly adhere it to the through groove 26 or through hole.

[0251] (Example 36) As shown in Figures 79, 80, and 81, this embodiment provides a type of high-capacity battery, which includes a case 5, a plurality of single cells 21, and a pole adapter, the plurality of single cells 21 arranged side by side in the case 5, a shared chamber is provided in the case 5 to enable communication between at least one of the gas region and electrolyte region of each single cell 21, a pole relief hole 04 is opened at the top of the case 5 corresponding to the single cell pole 08 of each single cell 21, and the single cell pole 08 of each single cell 21 is connected to the pole adapter via the pole relief hole 04 (the pole relief hole serves as a connection passage between the single cell pole and the pole adapter, in one situation the single cell pole extends from the case and is connected to the pole adapter, and in another situation the pole adapter extends into the case and is connected to the single cell pole).

[0252] The specific structure of the high-capacity battery in this embodiment is as follows. 1) Each cell is mounted inside a case, which includes an outer cylinder, an upper sealing cover, and a lower sealing cover. The top and bottom of the outer cylinder are both open. The upper sealing cover is sealed and fixed (welded) to the top of the outer cylinder, and the upper sealing cover has pole relief holes that allow the poles of each cell to extend. The lower sealing cover is sealed and fixed (welded) to the bottom of the outer cylinder, and the lower sealing cover is provided with a shared chamber. 2) As shown in Figures 80 and 81, each cell 21 is mounted inside a case 5, which includes an outer cylinder, a front sealing cover, and a rear sealing cover. Both the front and rear of the outer cylinder are open openings. The front sealing cover is sealed and fixed (welded) to the front of the outer cylinder, and the rear sealing cover is sealed and fixed (welded) to the rear of the outer cylinder. A pole relief hole 04 is provided at the top of the outer cylinder, allowing the poles 142 of each cell 21 to extend. A shared chamber is provided at the bottom of the outer cylinder. 3) Each cell is mounted in a case, which includes a U-shaped housing, a first cover plate, a third cover plate, and a second cover plate, the first and third cover plates each covering two opposing open ends of the U-shaped housing, the second cover plate covering the open end at the top of the U-shaped housing and being sealed to the open end, and the second cover plate has pole relief holes that allow the poles of each cell to extend, and a shared chamber is provided at the bottom of the U-shaped housing.

[0253] In the above-described high-capacity battery, when each cell 21 is attached to the case 5, the cell pole 08 of each cell 21 extends from the pole relief hole 04 and is then connected to a pole adapter, which is a polarity terminal according to Embodiment 35. A first hole 42 is provided in the pole adapter, and the first hole 42 is a blind hole. Specifically, when connecting, the bottom of the blind hole and the cell pole 08 are welded together to achieve the connection between the two. A heat transfer tube 3 is attached to the pole adapter of each cell 21, and the heat transfer tube 3 is provided in the through groove or through hole of each pole adapter. The heat transfer tube 3 is used to transfer the heat generated in each cell 21.

[0254] When the above-mentioned multiple high-capacity batteries constitute an energy storage system, a temperature control system controls the temperature of each high-capacity battery in the entire energy storage system. The energy storage system includes multiple battery packs, each battery pack containing multiple high-capacity batteries connected in series. The temperature control system includes heat transfer tubes 3, a secondary bus duct, a primary bus duct, and a temperature control device. The heat transfer tubes 3 are directly attached to the pole adapters of each cell 21, and the heat transfer tubes 3 contain a heat conduction medium to handle the heat generated in each cell in the high-capacity batteries. The high-capacity batteries in each battery pack are connected in parallel to the secondary bus duct via two quick joints, the secondary bus ducts of multiple battery packs are connected to the primary bus duct so as to be connected in parallel, and the primary bus duct is connected to the temperature control device. [Explanation of Symbols]

[0255] 1. Slender member; 11. Clamp part; 112. First through hole; 113. Second through hole; 2. High-capacity battery; 21. Single cell; 3. Heat transfer tube; 4. High-capacity battery; 5. Case; 51. Electrolyte sharing chamber; 52. Gas chamber; 6. First hollow member; 7. Second hollow member; 8. Electrical connector; 81. Metal aluminum plate; 22. Pole pole adapter body; 42. First hole; 23. Conductive pole; 26. Through groove; 46. Screw hole; 481. Insulating joint; 49. Case top Plate; 03, Top plate of cylinder; 04, Pole column relief hole; 05, Bottom plate of cylinder; 07, End plate; 08, Single cell pole column; 24, Blind hole; 25, Electrical connection column; 32, Heat exchange passage; 49, Top plate of case; 513, Sealing connector; 514, Liquid cooling pipe; 533, Outer surface of pole column adapter; 34, Electrical connection member; 341, Vertical plate; 342, Horizontal plate; 343, First electrical connection plate; 344, Second electrical connection plate; 345, Third connection plate; 346, Liquid cooling pipe relief passage; 35, Pole column adapter Bottom surface of the pole adapter; 36, top surface of the pole adapter; 37, side surface of the pole adapter; 10, insulating protective cover; 101, second side wall; 102, slit; 103, first side wall; 104, insulating frame; 1041, long side frame; 1042, first surface; 1043, adhesive fixing plate; 1044, reinforcing rib; 105, insulating cover plate; 106, baffle plate; 107, second insulating side frame; 108, insulating bottom plate; 1081, electrical connection pole relief hole; 1082, partition plate; 109, pole adapter 110. Enclosure; 111. Annular adhesive-fastening ring; 112. Annular groove; 113. First partition plate; 114. Second partition plate; 115. Fourth partition plate; 38. L-shaped electrical connection plate; 39. Vertical connection plate; 40. Horizontal connection plate; 541. First bearing plate; 542. Second bearing plate; 42. First hole; 44. Through hole; a. First gap; b. Second gap; c. Third gap; d. Fourth gap; f. Perforated area; 915. Insulating layer; 916. Insulating sleeve.

Claims

1. A pole adapter characterized by being connected to the pole of a single cell and used to raise or lower the temperature of the pole.

2. The pole adapter according to claim 1, comprising a single elongated member, the elongated member being used to connect to the positive or negative poles of multiple single cells in a high-capacity battery, and the elongated member having a clamp portion provided along its axial direction for attaching a heat transfer tube.

3. The pole adapter according to claim 2, characterized in that the elongated members are connected to the positive or negative pole posts of each cell by the manner of welding.

4. The pole adapter according to claim 3, characterized in that the elongated member is a rectangular column, the clamp portion is a through groove opened in the rectangular column, and the dimensions of the through groove are suitable for a heat transfer tube.

5. The pole adapter according to claim 4, characterized in that the cross-section of the through groove is C-shaped.

6. The pole adapter according to claim 3, characterized in that the elongated member is a rectangular column, the clamp portion is a first through hole made in the rectangular column, and the diameter of the first through hole is suitable for a heat transfer tube.

7. The pole adapter according to claim 6, characterized in that the elongated member has a first through hole and a plurality of second through holes through it, and the position of each second through hole is such that when the elongated member is connected to each cell, the positive or negative pole of one cell corresponds below each second through hole.

8. The pole adapter according to claim 1, comprising a single elongated member, the elongated member being used to connect to the positive or negative poles of multiple single cells in a high-capacity battery, and the elongated member having a heat exchange passage for transmitting a heat transfer medium.

9. The pole adapter according to claim 8, characterized in that the axis of the heat exchange passage is parallel to the axis in the longitudinal direction of the elongated member and extends along the axial direction of the elongated member.

10. The pole adapter according to claim 9, characterized in that a plurality of blind holes are uniformly provided in the elongated member, the bottom of each blind hole is used to connect to the positive or negative pole of a single cell, and the blind holes and the heat exchange passage are separated from each other.

11. The pole adapter according to claim 10, characterized in that one conductive pole is fixed in each blind hole, and the outer wall of the conductive pole is in close contact with the inner wall of the blind hole.

12. The pole adapter according to claim 11, characterized in that the bottom of the blind hole is connected to the single cell pole by welding, a through hole is provided at the bottom of the blind hole that penetrates the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole.

13. The pole adapter according to claim 11, further comprising an electrical connection pole, the electrical connection pole being fixed to a region corresponding to a blind hole at the bottom of the pole adapter body, the electrical connection pole being used to contact the positive or negative pole of a single cell, and the blind hole extending to the electrical connection pole.

14. The pole adapter according to any one of claims 10 to 13, characterized in that a clamp portion for attaching a heat transfer tube is provided along the axial direction on the elongated member.

15. The pole adapter according to claim 14, characterized in that the clamp portion is a through groove opened in an elongated member, the dimensions of the through groove are suitable for a heat transfer tube, and the through groove and the heat exchange passage are separated from each other.

16. The pole adapter according to claim 15, characterized in that the through groove penetrates the blind hole.

17. The pole adapter according to claim 1, comprising a pole adapter body, wherein the pole adapter body has n first holes, and one single cell pole is connected through each of the first holes, provided that n ≥ 1.

18. The pole adapter according to claim 17, further comprising n conductive pillars, wherein the n conductive pillars are fixed in the first holes in a one-to-one correspondence with the n first holes, and the outer walls of the conductive pillars are in close contact with the inner walls of the first holes.

19. The pole adapter according to claim 18, characterized in that the first hole is a blind hole, the bottom of the blind hole is connected to a single cell pole by welding, a through hole is provided at the bottom of the blind hole that penetrates the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole.

20. The pole adapter according to claim 19, characterized in that the pole adapter body has through grooves for attaching heat transfer tubes, and the dimensions of the through grooves are suitable for heat transfer tubes.

21. The pole adapter according to claim 19, characterized in that four screw holes are uniformly distributed in the pole adapter body area around the blind hole.

22. The pole adapter according to claim 1, comprising a pole adapter body and n electrical connection poles fixed to the pole adapter body and protruding from the pole adapter body, wherein n ≥ 1, and a first hole is provided in the pole adapter body corresponding one-to-one with the n electrical connection poles, and each electrical connection pole is connected to a single cell pole through each first hole.

23. The pole adapter according to claim 22, further comprising n conductive pillars, the n conductive pillars being fixed in the first holes in one-to-one correspondence with the n first holes, and the outer walls of the conductive pillars being in close contact with the inner walls of the first holes.

24. The pole adapter according to claim 23, characterized in that the first hole is a blind hole and the blind hole extends to an electrical connection pole.

25. The pole adapter according to claim 24, characterized in that the bottom of the blind hole is connected to the single cell pole by welding, a through hole is provided at the bottom of the blind hole that penetrates the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole.

26. The pole pole adapter according to any one of claims 23 to 25, characterized in that the pole pole adapter body is a rectangular block and a clamp portion for attaching a heat transfer tube is provided on the pole pole adapter body.

27. The pole adapter according to claim 26, characterized in that the clamp portion is a through groove opened in the pole adapter body, and the dimensions of the through groove are suitable for a heat transfer tube.

28. The pole adapter according to claim 27, characterized in that the through groove penetrates the blind hole.

29. The pole adapter according to claim 1, comprising a pole adapter body and an electrical connection member provided on the pole adapter body, wherein the pole adapter body is used to connect to each single cell pole, the pole adapter body is provided with a clamp portion for attaching a liquid cooling pipe, and the electrical connection member is used to connect to an external electrical connector and to prevent insulating sealing adhesive from overflowing from some adhesive injection areas.

30. The pole adapter according to claim 29, characterized in that the electrical connection member is an inverted L-shaped plate, the vertical plate of the inverted L-shaped plate is parallel to the xz plane and is fixed to the top surface of the pole adapter, and is used to prevent insulating sealing adhesive from overflowing from a part of the adhesive injection area, the part of the adhesive injection area is the top surface of the pole adapter, and the horizontal plate of the inverted L-shaped plate is parallel to the xy plane and is used to connect to an external electrical connector or to be an electrical connector.

31. The pole adapter according to claim 30, wherein the electrical connection member further includes a first bearing plate, the first bearing plate is parallel to the xz plane, fixed to the lateral plate of the inverted L-shaped plate, and extends toward the bottom surface of the pole adapter.

32. The pole adapter according to claim 29, characterized in that the electrical connection member is a Z-shaped plate and includes a first electrical connection plate, a second electrical connection plate and a third connection plate; the first electrical connection plate is parallel to the xy plane and covers and is fixed to the top surface of the pole adapter; the top surface of the first electrical connection plate is a portion of the adhesive injection area; a liquid cooling pipe relief passage is provided on the surface of the first electrical connection plate that is in contact with the top surface of the pole adapter; the third connection plate is located between the first electrical connection plate and the second electrical connection plate and is used to prevent insulating sealing adhesive from overflowing from the portion of the adhesive injection area, the portion of the adhesive injection area being the top surface of the first electrical connection plate; and the second electrical connection plate is parallel to the xy plane and is used for connecting to an external electrical connector.

33. The pole adapter according to claim 32, wherein the electrical connection member further includes an L-shaped electrical connection plate, the vertical connection plate of the L-shaped electrical connection plate is connected to a second electrical connection plate, and the horizontal connection plate extends in a direction away from the first electrical connection plate and is connected to or used to form an external electrical connector.

34. The pole pole adapter according to claim 29, wherein the pole pole adapter body includes n electrical connection poles fixed to the pole pole adapter body and protruding from the pole pole adapter body, n ≥ 1, and the pole pole adapter body has first holes that correspond one-to-one with the n electrical connection poles, and each electrical connection pole is connected to a single cell pole pole through each of the first holes.

35. The pole adapter according to claim 34, characterized in that the clamp portion is a through groove opened in the pole adapter body, and the dimensions of the through groove are suitable for a liquid-cooled pipe.

36. The pole adapter according to claim 1, comprising a conductive column, wherein the conductive column is provided with a through groove or through hole, an insulating layer is provided on the groove wall of the through groove and an insulating sleeve is provided on the insulating layer, or an insulating layer is provided on the hole wall of the through hole and an insulating sleeve is provided on the insulating layer.

37. The pole adapter according to claim 36, characterized in that the insulating layer is a hard oxide layer and has a thickness of 20 μm to 50 μm.

38. The pole adapter according to claim 36, characterized in that the insulating layer is an insulating varnish applied to a through groove or through hole.

39. The pole adapter according to claim 36, characterized in that the insulating sleeve is a thermally conductive plastic sleeve or a thermally conductive rubber sleeve, and its thickness is 0.1 mm to 0.5 mm.

40. The pole adapter according to claim 39, characterized in that the insulating sleeve is provided in a through groove or through hole of a conductive column having an insulating layer by a heat-shrinkable form.

41. The pole adapter according to claim 36, characterized in that the cross-section of the through groove is C-shaped or U-shaped.

42. A large-capacity battery comprising a large-capacity battery body, heat transfer tubes, and a pole adapter according to any one of claims 2 to 7, wherein the large-capacity battery body comprises a plurality of single cells arranged side by side, there are two pole adapters, one of which is connected to the positive terminal of all single cells to form the positive pole of the large-capacity battery, and the other pole adapter is connected to the negative terminal of all single cells to form the negative pole of the large-capacity battery, and there are two heat transfer tubes, each of which is connected to the clamp portion of the two pole adapters and used to achieve heat exchange with the pole of each single cell.

43. An energy storage device comprising N large-capacity batteries according to claim 42 and N-1 electrical connectors, wherein N ≥ 2, the N large-capacity batteries are arranged side by side, two adjacent large-capacity batteries are connected in series via one electrical connector, part of the electrical connector is connected to a pole adapter which is the positive pole of one large-capacity battery, and the other part of the electrical connector is connected to a pole adapter which is the negative pole of the other large-capacity battery.

44. The energy storage device according to claim 43, characterized in that the electrical connector includes at least one metal aluminum plate, and the metal aluminum plate is connected to the pole adapter by screw.

45. The energy storage device according to claim 43, characterized in that the electrical connector includes at least one metal aluminum plate, and the metal aluminum plate and two adjacent pole adapters in two adjacent high-capacity batteries are an integral component.

46. A high-capacity battery comprising a plurality of single cells and a pole adapter according to any one of two claims 8 to 16, wherein the plurality of single cells are arranged sequentially along the same direction, one pole adapter is connected to the positive terminal of all the single cells, and the other pole adapter is connected to the negative terminal of all the single cells.

47. The high-capacity battery according to claim 46, further comprising a case, wherein multiple single cells are arranged sequentially within the case in the same direction, pole relief holes corresponding to each single cell pole are provided in the top plate of the case, case regions corresponding to the pole relief holes are fixed and sealed to the single cell housing, and the electrical connection poles of the pole adapter extend into the pole relief holes and are electrically connected to each single cell pole.

48. A high-capacity battery comprising m single cells and a first electrical connector, each single cell comprising a positive pole and a negative pole, each of which is connected to a pole adapter according to any one of claims 17 to 21, the pole adapter body having a first hole, and the first electrical connector connecting the pole adapters of each single cell to realize series or parallel connection of each single cell.

49. A high-capacity battery comprising m single cells, wherein m > 1, further comprising a pole adapter according to any one of two claims 17 to 21, wherein m first holes are provided in the pole adapter body, one of which pole adapters is connected to the positive poles of all single cells, and the other pole adapter is connected to the negative poles of all single cells.

50. The high-capacity battery according to claim 48 or 49, which may further include heat transfer tubes, the heat transfer tubes being installed in through grooves in the pole adapter body.

51. The high-capacity battery according to claim 50, characterized in that the heat transfer tubes are arranged in a meandering configuration and all pole adapters are connected in series.

52. An energy storage device comprising a large-capacity battery and a second electrical connector as described in any one of the multiple claims 49 to 51, wherein the multiple large-capacity batteries are arranged side by side, two adjacent large-capacity batteries are connected in series via the second electrical connector, one side of the second electrical connector is connected to a pole adapter at the positive pole of each cell of one large-capacity battery, and the other side of the second electrical connector is connected to a pole adapter at the negative pole of each cell of the other large-capacity battery.

53. A high-capacity battery comprising a case, m single cells arranged within the case, and 2m pole adapters according to any one of claims 22 to 28, wherein m > 1, and one electrical connection pole is fixed to the pole adapter body; the case consists of a cylindrical body and end plates fixed to both ends thereof; pole relief holes corresponding to each single cell pole are provided in the top plate of the cylindrical body, and the case regions corresponding to the pole relief holes are fixed and sealed to the housing of the single cells; the positive and negative poles of each single cell each correspond to one pole adapter, and the electrical connection pole of each pole adapter extends into the pole relief hole and is connected to the corresponding pole of the single cell.

54. A high-capacity battery comprising a case, m single cells arranged within the case, and a pole adapter according to any one of two claims 22 to 28, wherein m > 1, and m electrical connection poles are fixed to the pole adapter body; the case consists of a cylindrical body and end plates fixed to both ends thereof; pole relief holes corresponding to each single cell pole are provided in the top plate of the cylindrical body, and the case regions corresponding to the pole relief holes are fixed and sealed to the housing of the single cells; the m electrical connection poles of one pole adapter extend into their respective pole relief holes and are connected to the positive pole pole of each single cell, and the m electrical connection poles of the other pole adapter extend into their respective pole relief holes and are connected to the negative pole pole of each single cell.

55. An energy storage device comprising a large-capacity battery and an electrical connector according to one of the claims 53 or 54, wherein the multiple large-capacity batteries are arranged side by side, two adjacent large-capacity batteries are connected in series via an electrical connector, one side of the electrical connector is connected to a pole adapter at the positive pole of each cell of one large-capacity battery, and the other side of the electrical connector is connected to a pole adapter at the negative pole of each cell of the other large-capacity battery.

56. A high-capacity battery comprising a case, a plurality of single cells, and a pole adapter; the plurality of single cells are arranged side by side within the case, and a shared chamber is provided within the case to enable communication between at least one of the gas region and the electrolyte region of each single cell; pole relief holes are provided at the top of the case corresponding to the single cell poles of each single cell; the single cell poles of each single cell are connected to the pole adapter via the pole relief holes; the pole adapter is a polarity terminal as described in any one of claims 36 to 41, and a heat transfer tube is provided in a through groove or through hole of the pole adapter of each single cell.

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