High-capacity cell battery

Abstract

The invention belongs to the technical field of batteries, and discloses a high-capacity cell battery. The high-capacity cell battery comprises at least one single cell, a voltage regulating circuit board and a conductive connecting bar, wherein the single cell is provided with an electrode terminal; the voltage regulating circuit boards are arranged on one sides of the single battery cells at intervals, and the voltage regulating circuit boards can regulate voltage; and the conductive connecting bar is arranged between each electrode terminal and the voltage regulating circuit board, and the conductive connecting bar is arranged in a sheet shape. According to the high-capacity cell battery disclosed by the invention, the electrode terminals of the single cells are connected with the voltage regulating circuit board through the conductive connecting bars; firstly, compared with a traditional multi-cell battery, the production cost is lower, and the process is simple; secondly, the conductive connecting bar has a larger cross sectional area, so that the current bearing capability of the conductive connecting bar and the battery safety are improved, and the temperature rise of the conductive connecting bar during working is reduced; in addition, the surface area of the conductive connecting bar is larger than that of a wire, so that the heat dissipation performance of the conductive connecting bar is improved, and the reliability and the safety of the high-capacity cell battery are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a large-capacity cell battery. Background Art

[0002] With the continuous development of the new energy market, more and more batteries are widely used in various types of devices. Current batteries mainly include components such as a housing, cells, and a battery manager. Among them, the voltage of a single conventional cell is approximately 3.2V, and the output voltage of the battery is mostly 12V and above. Therefore, multiple cells are provided inside the above-mentioned battery and are electrically connected in a series-first and then-parallel manner to meet the requirements of voltage and capacity.

[0003] In actual production of the above battery with a multi-cell series-parallel design, it is necessary to first perform consistency screening on the voltage, capacity, internal resistance, etc. of the cells, then perform grading and formation, and then perform welding. This not only requires a large amount of labor costs but also requires a large amount of connection materials. In addition, during the operation of the battery, the consistency of multiple cells has a great impact on the various performances of the battery. Therefore, the battery also needs to be provided with a balancing circuit, which further increases the production cost of the multi-cell battery.

[0004] In order to overcome the above defects, some manufacturers have currently carried out research and development on large-capacity cell batteries. A large-capacity cell battery is a battery that includes only one large-capacity single cell, and the output voltage of the battery is increased by matching a boost circuit, so that the large-capacity cell battery can meet many power consumption scenarios.

[0005] However, by boosting the voltage of a single cell from 3.2V to 12V, 24V or above 48V through a boost circuit, a high boost ratio will cause the current carried by the boost circuit to increase exponentially, especially resulting in a large temperature rise of components such as connecting wires and circuit boards. These components bear large current impacts for a long time, which not only affects the energy conversion efficiency of the battery but also seriously affects the reliability and safety of the large-capacity cell battery. Therefore, the practical application and promotion of the large-capacity cell battery are severely restricted. Summary of the Invention

[0006] The purpose of the present invention is to provide a large-capacity cell battery to improve the current situation of large temperature rise of components in the large-capacity cell battery, thereby enhancing the reliability and safety of the large-capacity cell battery.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A large-capacity cell battery, the large-capacity cell battery includes:

[0009] At least one single cell, the single cell having electrode terminals;

[0010] A voltage regulating circuit board, the voltage regulating circuit board is spaced apart from one side of the single battery cell, and the voltage regulating circuit board can increase the input voltage; and

[0011] A conductive connection row is arranged between each of the electrode terminals and the voltage regulating circuit board, and the conductive connection row is arranged in a sheet shape.

[0012] Preferably, the conductive connection bar comprises:

[0013] a tab connection row, one end of which is connected to the electrode terminal and the other end of which extends toward the voltage regulating circuit board; and

[0014] A shunt row is connected between the tab connection row and the voltage regulating circuit board.

[0015] Preferably, at least one first positioning portion is provided on a side of the shunt row close to the voltage regulating circuit board, and the voltage regulating circuit board is provided with a first positioning hole corresponding to each of the first positioning portions, and the first positioning portion is inserted into the first positioning hole.

[0016] Preferably, a heat dissipation slot is provided on a side of the shunt row away from the voltage regulating circuit board, each of the first positioning portions corresponds to one of the heat dissipation slots, and the shape of the heat dissipation slots matches the shape of the corresponding first positioning portion.

[0017] Preferably, the conductive connection bar further comprises:

[0018] A bus, one end of the bus is connected to the pole ear connection row, a plurality of shunt bars are arranged at intervals, one end of all the shunt bars are connected to the bus, and the voltage regulating circuit board is provided with at least one connection end corresponding to each shunt bar, and each shunt bar is connected to the corresponding connection end.

[0019] Preferably, a second positioning portion is provided on a side of the busbar close to the voltage regulating circuit board, and a second positioning hole is provided on the voltage regulating circuit board corresponding to the second positioning portion, and the second positioning portion is inserted into the second positioning hole.

[0020] Preferably, the large-capacity battery cell further comprises:

[0021] The housing is provided with the single battery cell and the voltage regulating circuit board both arranged inside the housing.

[0022] Preferably, the conductive connection row is located on a side of the voltage regulating circuit board close to the single battery cell, and a plurality of charge and discharge switches are provided on a side of the voltage regulating circuit board away from the single battery cell.

[0023] Preferably, the charge and discharge switch is in direct contact with the inner wall of the housing; or,

[0024] a heat dissipation component is provided between the charge and discharge switch and the inner wall of the housing.

[0025] Preferably, an inductor is provided on a side of the voltage regulating circuit board close to the single cell.

[0026] Advantages of the present invention:

[0027] For the large-capacity cell battery of the present invention, the electrode terminals of the single cells and the voltage regulating circuit board are connected by a sheet-shaped conductive connection row; firstly, there is usually only one large-capacity single cell inside the large-capacity cell battery. By using one single cell to replace dozens or even hundreds of small-capacity cells in the traditional multi-cell battery, the connection auxiliary materials and welding processes between the cells are saved compared with the traditional multi-cell battery, and the production cost is greatly reduced; secondly, the conductive connection row has a larger cross-sectional area than the wire. Under the same conductor material, the current is proportional to the cross-sectional area of the conductor. Therefore, the conductive connection row can allow a larger current to pass through, thereby improving the current-carrying capacity of the conductive connection row and reducing the temperature rise when a large current passes through the conductive connection row; in addition, the conductive connection row has a larger surface area than the wire, and the surface of the conductive connection row is exposed, greatly increasing the heat dissipation area of the conductive connection row, directly improving the heat dissipation performance of the conductive connection row, and further improving the current-carrying capacity of the conductive connection row. It not only does not easily conduct heat to the voltage regulating circuit board, but also can assist the voltage regulating circuit board in heat dissipation; finally, the current situation of large temperature rise of the large-capacity cell battery can be improved, thereby improving the reliability and safety of the large-capacity cell battery. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the large-capacity cell battery of the present invention;

[0029] Figure 2 is a schematic structural diagram of the conductive connection row of the present invention;

[0030] Figure 3 is a schematic structural diagram of the voltage regulating circuit board of the present invention;

[0031] Figure 4 is Figure 3 an enlarged view of part A in

[0032] Figure 5 is a cutting schematic diagram of the shunt row of the present invention.

[0033] In the figure:

[0034] 1. Single cell; 11. Electrode terminal; 2. Voltage regulating circuit board; 21. First positioning hole; 22. Second positioning hole; 23. Charge and discharge switch; 24. Inductor; 3. Conductive connection row; 31. Tab connection row; 32. Shunt row; 321. First positioning part; 322. Heat dissipation groove; 33. Bus bar; 331. Second positioning part; 332. Connection part; 3321. Nut post; 4. Housing. Detailed implementation mode

[0035] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0036] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] The following will refer to Figures 1 to 5 to illustrate the high-capacity cell battery provided by the present invention.

[0040] Embodiment 1

[0041] Referring to Figure 1 , the high-capacity cell battery includes a housing 4, a single cell 1, a voltage regulating circuit board 2, and a conductive connection row 3. Among them, the single cell 1, the voltage regulating circuit board 2, and the conductive connection row 3 are all arranged inside the housing 4. The voltage regulating circuit board 2 is arranged at an interval on one side of the single cell 1, and the conductive connection row 3 is connected between the single cell 1 and the voltage regulating circuit board 2.

[0042] Specifically, the housing 4 is arranged in a cuboid shape and has a cavity inside. Exemplarily, in this embodiment, only one single cell 1 is provided. The single cell 1 is also arranged in a cuboid shape. The two electrode terminals 11 (positive electrode terminal and negative electrode terminal) of the single cell 1 are located at the top of itself. The voltage of the single cell 1 is 3.2V and the capacity is 300AH. The capacity of a single single cell 1 can meet the needs of conventional electrical equipment.

[0043] Referring to Figure 2 and Figure 3 , the voltage regulating circuit board 2 is vertically arranged on one side of the single cell 1 and is parallel to one of the inner walls of the housing 4. The voltage regulating circuit board 2 can boost the input voltage and lower the input voltage. In this embodiment, voltage regulation is achieved by mounting a DC-DC power module on the voltage regulating circuit board 2; First, the use of a DC-DC power module can significantly shorten the product development cycle, thus saving development time and improving R & D efficiency; Second, the modular design of the DC-DC power module is easier to troubleshoot and replace, thus improving the overall reliability; In addition, the DC-DC power module has high efficiency and low power consumption; In addition, the DC-DC power module has a wide voltage regulation range and good voltage regulation effect, suitable for various application scenarios. The DC-DC power module can also precisely adjust electrical parameters such as the input and output voltages or currents, and can prevent the conductive connection row 3 from overheating, improving safety. Optionally, in some other embodiments, other boost circuits and buck circuits can also be designed on the voltage regulating circuit board 2. The specific design of the boost circuit and the buck circuit is prior art and will not be elaborated here.

[0044] It should be added that the voltage regulating circuit board 2 in this embodiment can step down and step up. When the single cell 1 discharges externally, it is stepped up through the boost circuit to supply power to a load with a higher voltage; When charging the single cell 1, the power supply is stepped down through the buck circuit to charge the single cell 1 with a lower voltage. Of course, in some other embodiments, only a boost circuit can be designed on the voltage regulating circuit board 2, and the single cell 1 can be charged by other means.

[0045] Further, the conductive connection row 3 is disposed between each electrode terminal 11 and the voltage regulating circuit board 2, that is, there are two conductive connection rows 3 in this embodiment. The monomer cell 1 and the voltage regulating circuit board 2 are electrically connected through the conductive connection row 3, and the output voltage of the monomer cell 1 can be boosted to 12V, 24V, 48V or higher through the voltage regulating circuit board 2 to meet the requirements of electrical appliances with various different working voltages. This embodiment only takes 12V as an example.

[0046] Referring to Figure 2 , each conductive connection row 3 includes an ear connection row 31, a bus bar 33, and a shunt row 32. The ear connection row 31, the bus bar 33, and the shunt row 32 are all arranged in a sheet shape, that is, the combined conductive connection row 3 is also in a sheet structure; in this way, the cross-sectional area of the conductive connection row 3 is increased. When the conductor materials are the same, the current is proportional to the cross-sectional area of the conductor, enabling the conductive connection row 3 to allow a larger current to pass through, improving the current-carrying capacity of the conductive connection row 3, and thus reducing the temperature rise when a large current passes through the conductive connection row 3; secondly, the sheet-shaped conductive connection row 3 has a larger surface area than the wire, and the outer wall of the conductive connection row 3 is exposed, greatly increasing the heat dissipation area of the conductive connection row 3, directly improving the heat dissipation performance of the conductive connection row 3, and further improving the current-carrying capacity of the conductive connection row 3. It not only does not easily conduct heat to the voltage regulating circuit board 2 but also can assist the voltage regulating circuit board 2 in heat dissipation.

[0047] Specifically, the ear connection row 31 is horizontally arranged, one end of the ear connection row 31 is connected to the electrode terminal 11, and the other end extends to the voltage regulating circuit board 2. The bus bar 33 is vertically arranged at the bottom of the other end of the ear connection row 31, the bus bar 33 is perpendicular to the voltage regulating circuit board 2, and the top end of the bus bar 33 is connected to the other end of the ear connection row 31. A plurality of shunt rows 32 are arranged along the length direction of the bus bar 33. In this embodiment, two are taken as an example for one of the conductive connection rows 3, and three are taken as an example for the other conductive connection row 3. The shunt rows 32 are perpendicular to the voltage regulating circuit board 2 and the bus bar 33. One end of all the shunt rows 32 is connected to the bus bar 33, and all the shunt rows 32 are connected to the voltage regulating circuit board 2.

[0048] By arranging a plurality of shunt buses 32 connected in parallel to electrically connect the tab connection bus 31 and the boost circuit of the voltage regulating circuit board 2, the large current is further shunted, thereby improving the current-carrying capacity of the conductive connection bus 3 and increasing the heat dissipation area. Furthermore, the contact area between the conductive connection bus 3 and the voltage regulating circuit board 2 is increased through the bus bar 33 and the plurality of shunt buses 32, improving the heat conduction efficiency between the two. In addition, both the bus bar 33 and the shunt buses 32 are arranged perpendicular to the voltage regulating circuit board 2, enabling both sides of the bus bar 33 and both sides of the shunt buses 32 to have a large heat dissipation space, allowing the bus bar 33 and the shunt buses 32 to dissipate heat sufficiently. It should be added that in this embodiment, the plurality of shunt buses 32 in the two conductive connection buses 3 are arranged alternately.

[0049] Exemplarily, in order to improve the connection stability between the tab connection bus 31 and the bus bar 33, a connection portion 332 is connected to the top end of the bus bar 33. The connection portion 332 is parallel and in contact with the tab connection bus 31. A nut post 3321 is connected to the bottom of the connection portion 332. A screw is passed through the tab connection bus 31, and after passing through the tab connection bus 31, it is threadedly connected to the nut post 3321, making the connection portion 332 and the tab connection bus 31 fit tightly together, thus ensuring the stability of their connection.

[0050] It is worth noting that the connection portion 332 is obtained by bending the top end of the bus bar 33, that is, the connection portion 332 and the bus bar 33 are integrally provided, which not only ensures the connection strength between the connection portion 332 and the bus bar 33, but also ensures the current-carrying capacity at the connection between the connection portion 332 and the bus bar 33. Optionally, in some other embodiments, the tab connection bus 31 and the bus bar 33 can also be directly welded together.

[0051] Furthermore, the voltage regulating circuit board 2 is provided with at least one connection end corresponding to each shunt bus 32, and all the shunt buses 32 are connected to the connection ends. In this embodiment, six connection ends are provided corresponding to each shunt bus 32, thereby performing a shunt design in the voltage regulating circuit board 2, enabling the voltage regulating circuit board 2 to carry a large current.

[0052] Refer to Figure 3 and Figure 5, in order to position the shunt busbar 32, at least one first positioning portion 321 is connected to one side of each shunt busbar 32 close to the voltage regulating circuit board 2. In this embodiment, six are taken as an example. A first positioning hole 21 is formed at the position of the voltage regulating circuit board 2 corresponding to each first positioning portion 321, and the first positioning portion 321 can be inserted into the first positioning hole 21. Thus, through the insertion and cooperation of the first positioning portion 321 and the first positioning hole 21, the shunt busbar 32 is positioned, which not only facilitates the installation of the shunt busbar 32, but also prevents the installed shunt busbar 32 from moving during operation, improving the working stability of the shunt busbar 32. It should be noted that the connection end is arranged at the position of the first positioning portion 321 in this embodiment, and the first positioning portion 321 is electrically connected to the connection end, so that the first positioning portion 321 serves both the positioning and connection functions. Of course, in some other embodiments, the connection end can also be arranged at other positions, and other positions of the shunt busbar 32 are connected to the connection end.

[0053] Furthermore, a heat dissipation groove 322 is formed on the side of the shunt busbar 32 far from the first positioning portion 321. One heat dissipation groove 322 is provided corresponding to each first positioning portion 321, and the shape of the heat dissipation groove 322 is adapted to the shape of the first positioning portion 321 corresponding to the heat dissipation groove 322. It can be understood that in this embodiment, each shunt busbar 32 has six heat dissipation grooves 322, and the six heat dissipation grooves 322 are arranged in one-to-one correspondence with the six first positioning portions 321, and the shapes of the corresponding heat dissipation grooves 322 and first positioning portions 321 are adapted. Any heat dissipation groove 322 and the first positioning portion 321 corresponding to the heat dissipation groove 322 are arranged along the width direction of the shunt busbar 32.

[0054] Through the above settings, not only the heat dissipation area of the shunt busbar 32 is enlarged through the heat dissipation grooves 322; in addition, please refer to Figure 5 , multiple shunt busbars 32 can be obtained by cutting a whole sheet of material. When cutting, the position of the first positioning portion 321 of the previous shunt busbar 32 just forms a heat dissipation groove 322 on the next shunt busbar 32, that is, no waste material is generated between adjacent two shunt busbars 32, reducing the waste of materials during the cutting process and further reducing the production cost.

[0055] Further, a second positioning portion 331 is connected to the side of the bus bar 33 close to the voltage regulating circuit board 2, and a second positioning hole 22 for inserting the second positioning portion 331 is formed at the position corresponding to the second positioning portion 331 on the voltage regulating circuit board 2. In this embodiment, each bus bar 33 is provided with three second positioning portions 331, and each second positioning portion 331 is located close to the shunt bus bar 32. The mutually adjacent first positioning portion 321 and second positioning portion 331 are in contact with each other, thereby further precisely limiting the bus bar 33 and enabling stable conduction between the bus bar 33 and the shunt bus bar 32. It is worth noting that the bus bar 33 in this embodiment is produced by the same process as the shunt bus bar 32, that is, heat dissipation grooves are also provided on the bus bar 33, thereby improving the heat dissipation effect of the bus bar 33 and saving materials.

[0056] In addition, a charge and discharge switch 23 and an inductor 24 are connected to the voltage regulating circuit board 2. The charge and discharge switch 23 is connected to the side of the voltage regulating circuit board 2 facing away from the single cell 1. There are several charge and discharge switches 23, and the charge and discharge switch 23 is in direct contact with the inner wall of the housing 4. The inductor 24 is connected to the side of the voltage regulating circuit board 2 close to the single cell 1. The specific functions of the charge and discharge switch 23 and the inductor 24 in the boost circuit are prior art and will not be elaborated here. In this embodiment, it is worth noting that by arranging the charge and discharge switch 23 and the inductor 24 on both sides of the voltage regulating circuit board 2 respectively in the above-mentioned arrangement manner, firstly, after the charge and discharge switch 23 fits against the inner wall of the housing 4, it can transfer its own heat and the heat of the voltage regulating circuit board 2 to the housing 4 for heat dissipation, thereby improving the heat dissipation effect and ultimately improving the stability of the large-capacity cell battery. Secondly, it can prevent the relatively large inductor 24 from being arranged on the same side as the charge and discharge switch 23, which may hinder the charge and discharge switch 23 from fitting against the inner wall of the housing 4, thus ensuring the heat dissipation performance of the voltage regulating circuit board 2.

[0057] Optionally, in some other embodiments, a heat dissipation member may also be provided between the charge and discharge switch 23 and the inner wall of the housing 4. The heat dissipation member referred to in this embodiment is a component capable of dissipating heat from the charge and discharge switch 23. Therefore, in addition to the conventional components that directly dissipate heat from the charge and discharge switch 23, such as a fan; it also includes components that conduct the heat of the charge and discharge switch 23 to the housing 4, such as a heat conducting sheet or heat conducting glue, etc., which can conduct the heat of the charge and discharge switch 23 to the housing 4.

[0058] Preferably, a set of inductors 24 is provided between each adjacent pair of shunt bus bars 32. In this embodiment, each set of inductors 24 includes only one inductor 24, so that the inductors 24 are evenly distributed to ensure the working effect of the inductors 24.

[0059] Embodiment Two

[0060] The difference between this embodiment and the first embodiment is that in this embodiment, two single cells 1 are provided, and the two single cells 1 are connected in series, so that the two single cells 1 can output a voltage of 6.4V by themselves. After being boosted by the voltage regulating circuit board 2, the output voltage of the large-capacity cell battery can be increased to more than 48V, thereby reducing the boost ratio and improving the working safety of the large-capacity cell battery. Under the condition of ensuring electrical safety, the requirements of high-voltage electrical equipment can be met. Of course, in some other embodiments, three, four or more large-capacity single cells 1 can also be connected in series according to the voltage of the electrical equipment, but generally not more than five, which needs to be evaluated according to the actual situation.

[0061] Embodiment Three

[0062] The difference between this embodiment and the first embodiment is that in this embodiment, two single cells 1 are provided, and the two single cells 1 are connected in parallel, thereby increasing the capacity of the large-capacity cell battery to meet the working scenarios that require the output of large current. Of course, in some other embodiments, three, four or more large-capacity single cells 1 can also be connected in parallel according to the voltage of the electrical equipment, but generally not more than five, which needs to be evaluated according to the actual situation.

[0063] In summary, the present invention focuses on elaborating the innovative technologies involved in realizing a large-capacity cell battery through a single large-capacity single cell 1, and at the same time elaborates the ways of connecting two single cells 1 in series and in parallel, that is, a single large-capacity single cell 1 is equipped under normal conditions, and only in special cases will multiple large-capacity single cells 1 be equipped. Therefore, it is very easy for those of ordinary skill in the art to select the actual number of single cells 1 according to the implementation situation to meet the requirements of different output voltages and capacities. Whether a single single cell 1 or multiple single cells 1 are applied in the large-capacity cell battery belongs to the protection scope of the present invention.

[0064] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A large-capacity battery cell, characterized in that: The large-capacity battery cell comprises: At least one single cell (1), wherein the single cell (1) has an electrode terminal (11); A voltage regulating circuit board (2), the voltage regulating circuit board (2) being arranged at a distance from one side of the single battery cell (1), the voltage regulating circuit board (2) being capable of increasing the input voltage; and A conductive connection row (3), wherein the conductive connection row (3) is arranged between each electrode terminal (11) and the voltage regulating circuit board (2), and the conductive connection row (3) is arranged in a sheet shape.

2. A large-capacity battery cell according to claim 1, characterized in that: The conductive connection bar (3) comprises: a tab connection row (31), one end of which is connected to the electrode terminal (11) and the other end of which extends toward the voltage regulating circuit board (2); and A shunt row (32), the shunt row (32) being connected between the tab connection row (31) and the voltage regulating circuit board (2).

3. A large-capacity battery cell according to claim 2, characterized in that: At least one first positioning portion (321) is provided on a side of the shunt row (32) close to the voltage regulating circuit board (2), and the voltage regulating circuit board (2) is provided with a first positioning hole (21) corresponding to each first positioning portion (321), and the first positioning portion (321) is inserted into the first positioning hole (21).

4. A large-capacity battery cell according to claim 3, characterized in that: A heat dissipation slot (322) is provided on a side of the shunt row (32) away from the voltage regulating circuit board (2), each of the first positioning portions (321) corresponds to one of the heat dissipation slots (322), and the shape of the heat dissipation slot (322) is adapted to the shape of the corresponding first positioning portion (321).

5. A large-capacity battery cell according to claim 2, characterized in that: The conductive connection bar (3) further comprises: A bus bar (33), one end of the bus bar (33) is connected to the tab connection bar (31), a plurality of shunt bars (32) are arranged at intervals, one end of all the shunt bars (32) are connected to the bus bar (33), and the voltage regulating circuit board (2) is provided with at least one connection end corresponding to each shunt bar (32), and each shunt bar (32) is connected to the corresponding connection end.

6. A large-capacity battery cell according to claim 5, characterized in that: A second positioning portion (331) is provided on one side of the busbar (33) close to the voltage regulating circuit board (2), and a second positioning hole (22) is provided on the voltage regulating circuit board (2) corresponding to the second positioning portion (331), and the second positioning portion (331) is inserted into the second positioning hole (22).

7. A large-capacity battery cell according to claim 1, characterized in that: The large-capacity battery cell also includes: A shell (4), wherein the single battery cell (1) and the voltage regulating circuit board (2) are both arranged inside the shell (4).

8. A large-capacity battery cell according to claim 7, characterized in that: The conductive connection row (3) is located on a side of the voltage regulating circuit board (2) close to the single battery cell (1), and a plurality of charge and discharge switches (23) are provided on a side of the voltage regulating circuit board (2) away from the single battery cell (1).

9. A large-capacity battery cell according to claim 8, characterized in that: The charge and discharge switch (23) is in direct contact with the inner wall of the housing (4); or, A heat sink is provided between the charge and discharge switch (23) and the inner wall of the housing (4).

10. A large-capacity battery cell according to claim 9, characterized in that: An inductor (24) is provided on a side of the voltage regulating circuit board (2) close to the single battery cell (1).

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