Battery PACK connection system

Abstract

The utility model provides a battery PACK connecting system which comprises a box body, a main connector and an auxiliary connector. A battery main body is arranged in the box body, the box body is provided with a first side wall and a second side wall which are oppositely arranged, a first mounting hole is formed in the first side wall, and a second mounting hole is formed in the second side wall; the main connector comprises a male-end connector mounted in the first mounting hole, a female-end connector mounted in the second mounting hole and a cable for connecting the male-end connector and the female-end connector, and one of the male-end connector and the female-end connector is connected with the battery main body; the auxiliary connectors are electrically connected with the corresponding male end connectors or female end connectors; wherein the plurality of box bodies are arranged, and two adjacent box bodies are mutually stacked and are electrically connected with the corresponding female end connectors on the adjacent box bodies through the male end connectors, so that the battery cluster is formed. Compared with the prior art, the battery PACK connecting system disclosed by the utility model can realize quick connection and quick disassembly between the box bodies, is convenient to store and replace, and also can keep the appearances of a plurality of box bodies clean and tidy at the same time.

Description

Technical Field

[0001] The utility model relates to a battery PACK connection system, belonging to the technical field of connection devices. Background Art

[0002] A battery pack refers to the packaging, encapsulation, or assembly of multiple batteries. In the market, batteries are typically stored in boxes. Stacking multiple boxes increases the number of batteries and allows for series or parallel connection to meet different power source requirements. However, the complex assembly and installation structure of battery packs makes connecting and removing boxes time-consuming and labor-intensive, and also hinders storage and replacement.

[0003] In view of this, it is indeed necessary to improve the existing battery PACK connection system to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a battery PACK connection system to achieve quick connection and quick disassembly between boxes.

[0005] To achieve the above objectives, the present invention provides a battery pack connection system, comprising:

[0006] A box body, in which a battery body is arranged, the box body having a first side wall and a second side wall arranged opposite to each other, the first side wall having a first mounting hole, and the second side wall having a second mounting hole;

[0007] a main connector, comprising a male connector mounted in the first mounting hole, a female connector mounted in the second mounting hole, and a cable connecting the male connector and the female connector, one of the male connector and the female connector being connected to the battery body; and

[0008] an auxiliary connector, electrically connected to the corresponding male connector or the female connector;

[0009] There are multiple boxes, and two adjacent boxes are stacked on each other and electrically connected to corresponding female connectors on adjacent boxes through the male connector to form a battery cluster.

[0010] As a further improvement of the present invention, the first mounting hole and the second mounting hole are coaxially arranged, the second side wall is the bottom wall of the box, and the female connector is arranged at the bottom of the box.

[0011] As a further improvement of the present invention, at least one portion of the male connector and the female connector is exposed from the corresponding mounting hole, and one of the female connector and the male connector can be floatingly connected to the box.

[0012] As a further improvement of the present invention, the male connector portion is exposed outside the first mounting hole, and the female connector portion is exposed outside the second mounting hole.

[0013] As a further improvement of the present invention, the cross-sectional area of ​​the first mounting hole is smaller than the cross-sectional area of ​​the second mounting hole, and the main connector as a whole enters the box from the second mounting hole until the male connector part passes through the first mounting hole and abuts against the inner wall of the box, and the female connector part passes through the second mounting hole and abuts against the outer wall of the box.

[0014] As a further improvement of the present invention, the female connector and the box body are floatably connected, and the female connector includes an elastic member, which is supported on the outer wall surface of the box body.

[0015] As a further improvement of the present invention, the auxiliary connector includes a wired female connector electrically connected to the male connector at the top of the battery cluster to perform power connection and signal connection.

[0016] As a further improvement of the present invention, the auxiliary connector further includes a wired male connector electrically connected to the female connector at the bottom end of the battery cluster, and the wired male connector is used to connect to another battery cluster.

[0017] As a further improvement of the present invention, the auxiliary connector also includes a series connector electrically connected to the female connector at the bottom end of the battery cluster, and the series connector is used to connect multiple battery bodies in the battery cluster in series. A circuit board is provided in the series connector, and a terminal resistor is provided on the circuit board.

[0018] As a further improvement of the present invention, the auxiliary connector also includes a parallel connector electrically connected to the female connector at the bottom end of the battery cluster, and the parallel connector is used to connect multiple battery bodies in the battery cluster in parallel. A circuit board is provided in the parallel connector, and a terminal resistor is provided on the circuit board.

[0019] The beneficial effects of the present invention are as follows: the battery PACK connection system of the present invention is achieved by installing the male connector of the main connector in the first mounting hole on the first side wall of the box, installing the female connector in the second mounting hole on the second side wall of the box, and connecting one of the male connector and the female connector to the battery body in the box, while connecting the male connector and the female connector through a cable. Thus, when there are multiple boxes, two adjacent boxes can be stacked on each other and electrically connected to the corresponding female connectors on the adjacent boxes through the male connector to form a battery cluster. Compared with the existing technology, the battery PACK connection system of the present invention can achieve quick connection and quick disassembly between boxes, which is not only convenient for storage and replacement, but also keeps the appearance of multiple boxes neat. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery PACK connection system of the present utility model.

[0021] Figure 2 yes Figure 1 Exploded diagram.

[0022] Figure 3 yes Figure 2 Assembly drawing of the middle box and main connector.

[0023] Figure 4 yes Figure 3 sectional view.

[0024] Figure 5 yes Figure 3 Schematic diagram of the three-dimensional structure of the middle box.

[0025] Figure 6 yes Figure 3 Schematic diagram of the three-dimensional structure of the middle box from another angle.

[0026] Figure 7 yes Figure 3 Schematic diagram of the three-dimensional structure of the main connector.

[0027] Figure 8 yes Figure 7 Schematic diagram of the three-dimensional structure of the middle male end connector.

[0028] Figure 9 yes Figure 7 Schematic diagram of the three-dimensional structure of the middle female connector.

[0029] Figure 10 yes Figure 7 Schematic diagram of the three-dimensional structure of the middle female connector from another angle.

[0030] Figure 11 yes Figure 9 Exploded diagram.

[0031] Figure 12 yes Figure 2 Schematic diagram of the three-dimensional structure of the wired female connector.

[0032] Figure 13 yes Figure 2 Schematic diagram of the three-dimensional structure of the wired male connector.

[0033] Figure 14 yes Figure 13 Exploded diagram.

[0034] Figure 15 yes Figure 14 Assembly drawing of the middle docking part and the grounding structure.

[0035] Figure 16 yes Figure 14 Assembly drawing of the pins, ground structure and housing.

[0036] Figure 17 yes Figure 14 Schematic diagram of the three-dimensional structure of the embedded nut.

[0037] Figure 18 yes Figure 2 Schematic diagram of the three-dimensional structure of the series connector.

[0038] Figure 19 yes Figure 2 Schematic diagram of the three-dimensional structure of the parallel connector.

[0039] Figure 20 yes Figure 18 and Figure 19 Schematic diagram of the three-dimensional structure of the circuit board.

[0040] Figure 21 FIG. 1 is a schematic diagram of the three-dimensional structure of a series connector in another embodiment.

[0041] Figure 22 FIG. 4 is a schematic diagram of the three-dimensional structure of a parallel connector in another embodiment. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] See also Figure 1-Figure 2As shown, the present invention discloses a battery pack connection system 100, comprising a housing 1, a main connector 2 mounted on the housing 1, and an auxiliary connector 3 electrically connected to the main connector 2. Multiple housings 1 are provided, and adjacent housings 1 are stacked and connected via the main connector 2. The present battery pack connection system 100 enables quick connection and removal between housings 1, facilitating storage and replacement.

[0044] Combine Figure 3-Figure 11 As shown, in this embodiment, the box body 1 is rectangular and hollow. Of course, in other optional embodiments, the box body 1 can also be cylindrical, etc., which is not limited to this.

[0045] A battery body (not shown) is provided inside the box body 1, and the positive and negative poles of the battery body are connected to the main connector 2 through electrode cables 7. Preferably, the box body 1 has a first side wall 11 and a second side wall 12 that are arranged opposite to each other, and a first mounting hole 111 is provided on the first side wall 11, and a second mounting hole 121 is provided on the second side wall 12, and the first mounting hole 111 and the second mounting hole 121 are coaxially arranged. The second side wall 12 is the bottom wall of the box body 1, and the second side wall 12 is recessed toward the inside of the box body 1 as a whole, so that the box body 1 forms a frame 13 on the outside of the second side wall 12, and the frame 13 and the second side wall 12 enclose a receiving space 130. When two adjacent boxes 1 are stacked on each other, the frame 13 of the box body 1 located above is supported on the first side wall 11 of the box body 1 located below.

[0046] The main connector 2 includes a male connector 21 mounted in the first mounting hole 111, a female connector 22 mounted in the second mounting hole 121, and a cable 23 connecting the male connector 21 and the female connector 22. One of the male connector 21 and the female connector 22 is connected to the battery body. Preferably, the female connector 22 is located at the bottom of the box 1. When two adjacent boxes 1 are stacked, the male connector 21 is electrically connected to the corresponding female connector 22 on the adjacent box 1, forming a battery cluster.

[0047] At least one of the male connector 21 and the female connector 22 is partially exposed in the corresponding mounting hole, and one of the female connector 22 and the male connector 21 is capable of floating connection with the housing 1. In other words, the first embodiment comprises: the male connector 21 is partially exposed in the first mounting hole 111, and the female connector 22 is accommodated in the second mounting hole 121 and the housing 1; the second embodiment comprises: the male connector 21 is accommodated in the first mounting hole 111 and the housing 1, and the female connector 22 is partially exposed in the second mounting hole 121; and the third embodiment comprises: the male connector 21 is partially exposed in the first mounting hole 111, and the female connector 22 is also partially exposed in the second mounting hole 121.

[0048] In this embodiment, the male connector 21 is partially exposed from the first mounting hole 111, while the female connector 22 is partially exposed from the second mounting hole 121 and is located within the receiving space 130. The female connector 22 is in a floating connection with the housing 1, while the male connector 21 is fixedly connected to the housing 1. Of course, in other optional embodiments, the male connector 21 can also be in a floating connection with the housing 1, while the female connector 22 is fixedly connected to the housing 1, and this is not limited to this.

[0049] By arranging the female connector 22 or the male connector 21 to be floatingly connected to the box 1, the male connector 21 can be electrically connected to the corresponding female connector 22 on the adjacent box 1 while allowing position deviation, making the plugging of the male connector 21 and the corresponding female connector 22 simpler and more convenient.

[0050] Specifically, the cross-sectional area of ​​the first mounting hole 111 is smaller than the cross-sectional area of ​​the second mounting hole 121, so that when the main connector 2 is installed, the main connector 2 can enter the housing 1 from the second mounting hole 121 as a whole, until the male connector 21 partially passes through the first mounting hole 111 and abuts against the inner wall of the housing 1, and the female connector 22 partially passes through the second mounting hole 121 and abuts against the outer wall of the housing 1. Preferably, the outer periphery of the male connector 21 is provided with a protruding first mounting portion 211, which abuts against the inner wall of the housing 1; the outer periphery of the female connector 22 is provided with a protruding second mounting portion 221, which is located on the outer side of the housing 1 and abuts against the outer wall of the housing 1; both the first mounting portion 211 and the second mounting portion 221 can allow fasteners 8 to pass through to install the male connector 21 and the female connector 22 on the housing 1.

[0051] like Figures 9-11 As shown, in this embodiment, the female connector 22 is floatably connected to the box body 1, and the female connector 22 includes an elastic member, which is held against the outer wall of the box body 1. Specifically, the elastic member includes a first elastic member 222 and a second elastic member 223, and the first elastic member 222 and the second elastic member 223 are both assembled between the second mounting portion 221 and the box body 1. The second mounting portion 221 is spaced apart from the box body 1, and the first elastic member 222 is annularly arranged, and one side of the first elastic member 222 is clamped and fixed to the second mounting portion 221, and the other side is tightly attached to the outer wall of the box body 1. In this embodiment, the first elastic member 222 is preferably a rubber sealing ring with a deformation space, so that the rubber sealing ring can not only make the female connector 22 float relative to the box body 1, but also play a role in sealing and waterproofing.

[0052] The second elastic member 223 is preferably a spring. The second mounting portion 221 is provided with a first limiting hole 2211 for the fastener 8 to pass through. The second sidewall 12 of the housing 1 is correspondingly provided with a second limiting hole 122 for the fastener 8 to pass through. The second elastic member 223 is located between the first limiting hole 2211 and the second limiting hole 122. The second elastic member 223 is at least partially received within the first limiting hole 2211 and abuts against the second mounting portion 221, facilitating the fastener 8 to centrally and quickly pass through the first limiting hole 2211 and the second limiting hole 122. The fastener 8 fits into the second limiting hole 122, allowing it to be secured to the housing 1.

[0053] Preferably, the inner diameter of the first limiting hole 2211 is larger than the inner diameter of the second limiting hole 122 , so that the female connector 22 can float along the first limiting hole 2211 .

[0054] In summary, the female connector 22 can float relative to the fastener and the box body 1 under the elastic action of the first elastic member 222 and the second elastic member 223, so as to facilitate plugging with the corresponding male connector 21.

[0055] Combine Figure 8As shown, in this embodiment, the male connector 21 is equipped with multiple pins 212 and a circuit board 4 arranged parallel to and spaced apart from the pins 212. The circuit board 4 has multiple gold fingers 41 arranged in a straight line on opposite sides. The female connector 22 is equipped with multiple first slots 224 for inserting the pins 212 and second slots 225 for inserting the circuit board 4. The second slots 225 are equipped with multiple terminals (unnumbered) that contact the gold fingers 41. In this embodiment, the multiple pins 212 include two electrode pins 2121 and a ground pin 2122 located between the two electrode pins 2121. The multiple pins 212 are each electrically connected to one end of a cable 23, the other end of which is connected to the first slot 224. When two adjacent boxes 1 are stacked, the multiple pins 212 of the male connector 21 and the circuit board 4 are inserted into the corresponding first slots 224 and second slots 225 of the female connector 22 on the adjacent box 1, establishing a power and communication connection between the battery bodies in the two adjacent boxes 1. The circuit board 4 has stable contact and high degree of freedom, and can realize signal integration on the circuit board 4 and stable transmission.

[0056] like Figure 12 As shown, the auxiliary connector 3 is electrically connected to the corresponding male connector 21 or the female connector 22. The auxiliary connector 3 includes a wired female connector 31 that is electrically connected to the male connector 21 at the top of the battery cluster to connect power and signals. The wired female connector 31 has a similar structure to the female connector 22, and is provided with a plurality of first slots 224 for inserting the pins 212 and a second slot 225 for inserting the circuit board 4. The second slot 225 is provided with a plurality of terminals that contact the gold fingers 41. The wired female connector 31 can connect the battery cluster to the inverter to connect power and signals between the battery cluster and the inverter.

[0057] like Figure 13-17 As shown, the auxiliary connector 3 also includes a wired male connector 32 electrically connected to the female connector 22 at the bottom end of the battery cluster. The wired male connector 32 has a similar structure to the male connector 21, and is provided with a plurality of pins 212 and a circuit board 4 arranged parallel to and spaced apart from the plurality of pins 212. The plurality of pins 212 include two electrode pins 2121 and a grounding pin 2122 located between the two electrode pins 2121. The opposite sides of the circuit board 4 are provided with a plurality of gold fingers 41 arranged in a straight line. The wired male connector 32 is used to connect to another battery cluster to connect multiple battery clusters. Optionally, the wired male connector 32 can realize the series or parallel connection of multiple battery bodies in two adjacent battery clusters. The specific setting can be made according to actual needs and is not described in detail here.

[0058] The wired male connector 32 is also provided with a grounding structure 9. Specifically, the wired male connector 32 includes a docking portion 321 and a shell 322 assembled at one end of the docking portion 321. The docking portion 321 is provided with a protruding connecting portion 323, and the connecting portion 323 is assembled and matched with the shell 322. The connecting portion 323 is provided with a first fixing hole 3231, and the shell 322 is provided with a second fixing hole 3221 aligned with the first fixing hole 3231. The wired male connector 32 also includes an embedded nut 324 embedded in the first fixing hole 3231 and the second fixing hole 3221, and a grounding screw 325 threadedly engaged with the embedded nut 324. The grounding structure 9 is assembled on the docking portion 321, and the docking portion 321 is provided with a channel 3211 for the grounding structure 9 to pass through and to accommodate the grounding structure 9. The grounding structure 9 includes a conductive sheet 91. One end of the conductive sheet 91 is electrically connected to the grounding pin 2122, and the other end passes through the channel 3211 and is electrically connected to the embedded nut 324. The grounding pin 2122 is also connected to a ground wire, thereby grounding the grounding structure 9. Of course, in other optional embodiments, the grounding pin 2122 and the embedded nut 324 can also be electrically connected using other conductive components such as a conductive wire, and this is not limited to this.

[0059] Preferably, the outer circumference of the insert nut 324 is provided with protruding teeth 3241 along its central axis. Two protruding teeth 3241 are provided and spaced apart from each other to respectively retain the ends of the insert nut 324 within the first fixing hole 3231 and the second fixing hole 3221. The outer circumference of the insert nut 324 is also provided with a groove 3242 arranged along its circumference. The groove 3242 is located between the two protruding teeth 3241 and is received within the second fixing hole 3221. This further stabilizes the connection between the housing 322 and the connecting portion 323. Furthermore, the connection of the conductive sheet 91 to the groove 3242 also further stabilizes the grounding connection.

[0060] In this embodiment, the housing 1 is preferably mounted on a base. When the wired male connector 32 is electrically connected to the female connector 22 at the bottom of the battery cluster, the wired male connector 32 is mounted on the base. The grounding screw 325 passes through the base and screws into the insert nut 324, thereby simultaneously securing the wired male connector 32 and achieving grounding. In other words, the end user does not need to perform a separate grounding operation; they can simply tighten the grounding screw 325 to complete the grounding operation, which is more convenient and quick.

[0061] like Figures 18-20As shown, the auxiliary connector 3 also includes a series connector 33 electrically connected to the female connector 22 at the bottom of the battery cluster. The series connector 33 is used to connect multiple battery bodies within the battery cluster in series. Specifically, in the series state, the positive and negative poles of the battery bodies are electrically connected to the male connector 21 or the female connector 22, respectively, so that the positive pole of the battery body is connected to the negative pole of the battery body in the adjacent box 1, and the negative pole of the battery body is connected to the positive pole of the battery body in the adjacent box 1. The series connector 33 is equipped with a U-shaped pin 331, which connects the positive and negative poles of the battery body at the bottom of the battery cluster, thereby achieving series connection of multiple battery bodies.

[0062] The auxiliary connector 3 also includes a parallel connector 34 electrically connected to the female connector 22 at the bottom end of the battery cluster. The parallel connector 34 is used to connect multiple battery bodies in the battery cluster in parallel. Specifically, in the parallel state, the positive and negative poles of the battery body are electrically connected to the male connector 21 or the female connector 22, respectively, so that the positive pole of the battery body is connected to the positive pole of the battery body in the adjacent box 1, and the negative pole of the battery body is connected to the negative pole of the battery body in the adjacent box 1, that is, multiple battery bodies are connected in parallel. At this time, the parallel connector 34 not only ensures that the multiple battery bodies are connected in parallel with each other, but also acts as a waterproof cover and an insulating protective cover.

[0063] It can be seen that the battery body is connected to the male connector 21 or the female connector 22 via the electrode cable 7. When one end of the electrode cable 7 is fixedly connected to the male connector 21 or the female connector 22, the positive and negative connections of the electrode cable 7 and the battery body can be interchanged to satisfy the conversion between the series state and the parallel state of multiple battery bodies. In other words, when it is necessary to switch the connection state between multiple battery bodies, it is only necessary to change the positive and negative connection relationship between the battery body and the male connector 21 or the female connector 22 in the box 1, without changing the connection relationship between the multiple boxes 1.

[0064] Both the series connector 33 and the parallel connector 34 are equipped with a circuit board 4. Multiple gold fingers 41 are arranged in a straight line on opposite sides of the circuit board 4. These fingers are inserted into the second slots 225 of the corresponding female connector 22 to contact the terminals and establish a communication connection. In this embodiment, the series connector 33 and the parallel connector 34 are also equipped with a terminal resistor 5, which is located on the circuit board 4. The terminal resistor 5 serves to suppress interference when the series connector 33 or the parallel connector 34 is electrically connected to the female connector 22 at the bottom end of the battery cluster.

[0065] Optionally, when the multiple battery bodies in the battery cluster are in a parallel state, the circuit board 4 in the parallel connector 34 can also play the role of high-voltage interlocking, that is, the battery PACK connection system 100 can only operate normally and be powered on when the parallel connector 34 is electrically connected to the female connector 22 at the bottom of the battery cluster. In other words, the end user can make the following settings according to actual conditions: when the multiple battery bodies in the battery cluster are in a parallel state, the parallel connector 34 must be plugged into the female connector 22 at the bottom of the battery cluster to confirm that the female connector 22 is in a protected state before the battery PACK connection system 100 can operate normally. In this way, it can be ensured that the battery PACK connection system 100 can achieve a waterproof effect in any usage scenario, avoid the danger of the female connector 22 being directly exposed, and enhance the safety of use.

[0066] like Figure 21 and Figure 22 As shown, in another embodiment, the series connector 33' and the parallel connector 34' may also be provided with the grounding structure 9. At this time, the series connector 33' is provided with two electrode pins 2121 and a grounding pin 2122 located between the two electrode pins 2121, and the two electrode pins 2121 are electrically connected. Removing the two electrode pins 2121 in the series connector 33' forms the parallel connector 34' which is only provided with the grounding pin 2122. The specific structure of the grounding structure 9 in the series connector 33' and the parallel connector 34' and the connection method between the embedded nut 324 and the grounding screw 325 can adopt the design of the wired male connector 32, which will not be elaborated here.

[0067] like Figure 1 As shown, in one embodiment, the battery PACK connection system 100 further includes a base 6, on which the box 1 is mounted, and the base 6 is mounted on a support surface (not shown), that is, the base 6 separates the box 1 from the support surface, which can be a ground plane. In this case, the outer periphery of the series connector 33 and the parallel connector 34 can also be provided with a protruding third mounting portion 332, so that when the box 1 is supported on the base 6, the series connector 33 and the parallel connector 34 are locked to the base 6 through the third mounting portion 332 to achieve a reliable connection.

[0068] In another embodiment, the housing 1 is directly mounted on a supporting surface, and one side of each of the serial connector 33 and the parallel connector 34 is provided with a protruding third mounting portion 341. The corresponding female connector 22 is provided with a mating portion 227 that mates with the third mounting portion 341, thereby allowing the serial connector 33 or the parallel connector 34 to be securely connected to the female connector 22. The mating portion 227 is preferably located on the side of the second mounting portion 221 facing away from the housing 1.

[0069] In this embodiment, the wired female connector 31, the wired male connector 32, the serial connector 33, and the parallel connector 34 can be used in combination according to actual needs, or can be used separately, without limitation.

[0070] In summary, the battery PACK connection system 100 of the present invention is achieved by installing the male connector 21 of the main connector 2 in the first mounting hole 111 on the first side wall 11 of the box 1, installing the female connector 22 in the second mounting hole 121 on the second side wall 12 of the box 1, and connecting one of the male connector 21 and the female connector 22 to the battery body in the box 1. At the same time, the male connector 21 and the female connector 22 are connected by a cable. Therefore, when there are multiple boxes 1, two adjacent boxes 1 can be stacked on each other and electrically connected to the corresponding female connector 22 on the adjacent box 1 through the male connector 21 to form a battery cluster. Compared with the prior art, the battery PACK connection system 100 of the present invention can achieve quick connection and quick disassembly between boxes 1, which is not only convenient for storage and replacement, but also keeps the appearance of multiple boxes 1 neat.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A battery pack connection system, characterized in that: include: A box body, in which a battery body is arranged, the box body having a first side wall and a second side wall arranged opposite to each other, the first side wall having a first mounting hole, and the second side wall having a second mounting hole; a main connector, comprising a male connector mounted in the first mounting hole, a female connector mounted in the second mounting hole, and a cable connecting the male connector and the female connector, one of the male connector and the female connector being connected to the battery body; and an auxiliary connector, electrically connected to the corresponding male connector or the female connector; There are multiple boxes, and two adjacent boxes are stacked on each other and electrically connected to corresponding female connectors on adjacent boxes through the male connector to form a battery cluster.

2. The battery pack connection system according to claim 1, characterized in that: The first mounting hole and the second mounting hole are coaxially arranged, the second side wall is the bottom wall of the box, and the female connector is arranged at the bottom of the box.

3. The battery pack connection system according to claim 1, wherein: At least one portion of the male connector and the female connector is exposed from the corresponding mounting hole, and one of the female connector and the male connector is floatably connected to the box.

4. The battery pack connection system according to claim 3, characterized in that: The male connector portion is exposed at the first mounting hole, and the female connector portion is exposed at the second mounting hole.

5. The battery pack connection system according to claim 4, characterized in that: The cross-sectional area of ​​the first mounting hole is smaller than the cross-sectional area of ​​the second mounting hole, and the main connector as a whole enters the box from the second mounting hole until the male connector portion passes through the first mounting hole and abuts against the inner wall of the box, and the female connector portion passes through the second mounting hole and abuts against the outer wall of the box.

6. The battery pack connection system according to claim 5, characterized in that: The female connector is connected to the box body in a floating manner. The female connector includes an elastic member, and the elastic member is pressed against the outer wall surface of the box body.

7. The battery pack connection system according to claim 1, characterized in that: The auxiliary connector includes a wired female connector electrically connected to the male connector at the top of the battery cluster for power connection and signal connection.

8. The battery pack connection system according to claim 7, characterized in that: The auxiliary connector further includes a wired male connector electrically connected to the female connector at the bottom end of the battery cluster, and the wired male connector is used to connect to another battery cluster.

9. The battery pack connection system according to claim 7, characterized in that: The auxiliary connector also includes a series connector electrically connected to the female connector at the bottom end of the battery cluster. The series connector is used to connect multiple battery bodies in the battery cluster in series. A circuit board is provided in the series connector, and a terminal resistor is provided on the circuit board.

10. The battery pack connection system according to claim 7, wherein: The auxiliary connector also includes a parallel connector electrically connected to the female connector at the bottom end of the battery cluster. The parallel connector is used to connect multiple battery bodies in the battery cluster in parallel. A circuit board is provided in the parallel connector, and a terminal resistor is provided on the circuit board.

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