Connecting device, battery end connecting device, electric vehicle and battery pack assembly

Abstract

The invention provides a connecting device, a battery end connecting device, an electric vehicle and a battery pack assembly. The connecting device comprises a second connector, a moving mechanism and a driving mechanism, and the second connector is used for being connected with a first connector; the moving mechanism is fixed to the second connector and provided with a locking structure, and the locking structure is used for being matched with the lock connecting part. The locking structure has an initial position and a locking position; the driving mechanism can drive the second connector and the moving mechanism to move so that the lock connecting part can move to the locking position from the initial position of the locking structure. The driving mechanism can drive the second connector and the moving mechanism to move, so that the second connector gradually moves towards the first connector, and the locking structure and the lock connecting part play a role in guiding and aligning the first connector; after the first connector and the second connector are completely connected, the locking structure and the lock connecting part also have the function of mutually locking the first connector and the second connector.

Description

[0001] This application is a divisional of a Chinese invention patent with an application date of April 2, 2020, application number 202010255188.X, and name “Connection device, battery terminal connection device, electric vehicle and battery pack assembly”. Technical Field

[0002] The invention relates to a connecting device and an electric vehicle comprising the connecting device.

[0003] The present invention also relates to a battery terminal connecting device and a battery pack assembly comprising the battery terminal connecting device. Background Art

[0004] When the battery pack is installed on an electric vehicle or other device, the electrical connector of the battery pack needs to be connected to the electrical connector of the electric vehicle or other device. In the existing battery pack design, when the electrical connector of the battery pack is connected to other electrical connectors, the connection can only be ensured by the locking force of the battery pack itself, and the relative position of the electrical connector of the battery pack when connected to other electrical connectors is also affected by the tolerance of the battery pack itself. How to ensure the stability of the electrical connector of the battery pack when connected to other electrical connectors is a problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect of insufficient stability of the electrical connector of the battery pack and other connectors in the prior art, and to provide a connecting device, a battery terminal connecting device, an electric vehicle and a battery pack assembly.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention provides a connection device for cooperating with a lock connection part, wherein the lock connection part is fixedly connected to a battery pack, wherein the battery pack has a first connector, and the connection device comprises:

[0008] a second connector, the second connector being used to connect with the first connector;

[0009] A moving mechanism, the moving mechanism is fixed on the second connector, the moving mechanism is provided with a locking structure, the locking structure is used to cooperate with the lock connection part; the locking structure has a starting position and a locking position;

[0010] A driving mechanism, wherein the driving mechanism can drive the second connector and the moving mechanism to move, so that the lock connection portion moves from the starting position of the locking structure to the locking position.

[0011] In this technical solution, the driving mechanism can drive the second connector and the moving mechanism to move, so that the second connector gradually moves toward the first connector, and the lock connection part gradually moves to the locking position of the locking structure; when the lock connection part reaches the locking position, the first connector and the second connector are completely aligned to achieve a good connection. In this process, the locking structure and the lock connection part play a role in guiding and aligning the second connector; after the first connector and the second connector are fully connected, the locking structure and the lock connection part play a role in locking the first connector and the second connector to each other.

[0012] Preferably, the locking structure is a slide groove, the lock connection portion is a lock pin, and the lock pin can slide in the slide groove along the extension direction of the slide groove.

[0013] In the present technical solution, by sliding the locking pin in the sliding groove, when the locking pin reaches the locking position, the second connector reaches a position for alignment and connection with the first connector.

[0014] Preferably, an end of the slide slot closer to the first connector is a starting position, and an end of the slide slot farther from the first connector is a locking position.

[0015] In the technical solution, by setting the above-mentioned sliding groove, when the locking pin moves from the starting position of the sliding groove to the locking position, the second connector gradually approaches the first connector.

[0016] Preferably, the locking position of the slide slot is provided with a limiting area protruding toward the first connector, and the locking pin can fall into the limiting area.

[0017] In the present technical solution, when the locking pin falls into the limiting area, the locking pin is confined within the limiting area, that is, confined to the locking position of the slide slot, thereby achieving the effect of locking the position of the second connector.

[0018] Preferably, the moving mechanism is provided with a guide groove, and the guide groove extends from the surface of the moving mechanism to the starting position of the slide groove, and the locking pin can move along the guide groove to the starting position of the slide groove.

[0019] In the present technical solution, the guide groove plays a guiding role, so that the locking pin can smoothly move to the starting position of the slide groove.

[0020] Preferably, the locking pin includes a pin column and a pin flange protruding outward along the circumference of the pin column; the inner circumferential surface of the slide groove forms a first inner circumferential surface extending along the circumferential direction and a second inner circumferential surface extending along the circumferential direction, the first inner circumferential surface cooperates with the outer circumferential surface of the pin column, and the second inner circumferential surface cooperates with the outer circumferential surface of the pin flange; when the locking pin slides in the slide groove, the pin column moves in the groove formed by the first inner circumferential surface, and the pin flange moves in the groove formed by the second inner circumferential surface.

[0021] In the present technical solution, a step surface is formed between the first inner circumferential surface and the second inner circumferential surface; when the locking pin slides in the slide groove, the pin flange is restricted by the step surface so that the pin flange can only move in the groove formed in the second inner circumferential surface, thereby preventing the locking pin from disengaging from the slide groove during sliding.

[0022] Preferably, the connecting device further comprises a guide rail, the second connector is mounted on the guide rail, and the driving mechanism drives the second connector to move on the guide rail.

[0023] In the present technical solution, the setting of the guide rail ensures the moving path of the moving mechanism, and the guide rail cooperates with the driving mechanism to enable the second connector and the moving mechanism to move along a preset direction.

[0024] Preferably, there are multiple moving mechanisms, and the multiple moving mechanisms are arranged around the second connector.

[0025] In this technical solution, the moving mechanism arranged around the second connector can balance the force on the first connector and ensure the stability of the movement of the second connector.

[0026] Preferably, there are multiple locking structures, and the multiple locking structures are arranged around the second connector.

[0027] In the technical solution, the locking structure arranged around the second connector can balance the force on the first connector and ensure the stability of the movement of the second connector.

[0028] Preferably, the number of the moving mechanisms is an even number, and the even number of the moving mechanisms are symmetrically arranged on both sides of the second connector.

[0029] In the technical solution, the symmetrically arranged moving mechanisms can balance the forces on the first connector and ensure the stability of the movement of the second connector.

[0030] The present invention also provides an electric vehicle, which includes the connecting device described in the above technical solution.

[0031] In the present technical solution, the above-mentioned connection device is applied to an electric vehicle, which can ensure the stability and reliability of the connection between the battery pack installed in the electric vehicle and the battery pack fixing seat.

[0032] The present invention also provides a battery terminal connection device, comprising:

[0033] A first connector, the first connector being used to connect to the second connector of the connecting device described in the above technical solution;

[0034] A lock connection portion, wherein the lock connection portion is fixed on the first connector and is used to cooperate with the locking structure of the connection device described in the above technical solution; when the first connector is connected to the second connector, the lock connection portion is located in the locking position of the locking structure.

[0035] In the present technical solution, the locking structure and the lock connection part play the role of guiding and aligning the second connector; after the first connector and the second connector are fully connected, the locking structure and the lock connection part play the function of locking the first connector and the second connector to each other.

[0036] Preferably, there are a plurality of lock connection parts, and the plurality of lock connection parts are arranged around the first connector.

[0037] In the technical solution, by means of the lock connection portion arranged around the first connector, the force on the first connector is balanced, thereby ensuring the stability of the movement of the second connector.

[0038] The present invention also provides a battery pack assembly, which includes the battery terminal connecting device described in the above technical solution.

[0039] In the present technical solution, when the above-mentioned battery terminal connection device is applied to a battery pack assembly, the stability and reliability of the battery pack assembly when connected to other connectors can be ensured.

[0040] Preferably, the battery pack assembly includes a battery pack, and the battery terminal connection device is located on a side of the battery pack.

[0041] In the present technical solution, the position of the battery terminal connection device can be set according to the position of the connection device in the battery holder of the electric vehicle or the battery compartment of the battery swap station, without being affected by the installation path of the battery pack assembly.

[0042] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0043] The positive and progressive effects of the present invention are:

[0044] In the above-mentioned connection device, battery terminal connection device, electric vehicle and battery pack assembly, the driving mechanism can drive the second connector and the moving mechanism to move, so that the second connector gradually moves toward the first connector, and the lock connection part gradually moves to the locking position of the locking structure; when the lock connection part reaches the locking position, the first connector and the second connector are completely aligned to achieve a good connection. In this process, the locking structure and the lock connection part play a role in guiding and aligning the second connector; after the first connector and the second connector are fully connected, the locking structure and the lock connection part play a role in locking the first connector and the second connector to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic structural diagram of the connecting device of the present invention.

[0046] Figure 2 For Figure 1 A schematic structural diagram of a battery terminal connecting device that cooperates with the connecting device shown.

[0047] Figure 3 for Figure 1 The connection device shown is Figure 2 The combined schematic diagram of the battery terminal connection device shown.

[0048] Figure 4 for Figure 1 A partial schematic diagram of the moving mechanism of the connecting device shown.

[0049] Figure 5 for Figure 2 A schematic structural diagram of the lock connection portion of the battery terminal connection device is shown.

[0050] Figure 6 This is a schematic diagram of the installation of a battery pack assembly in which the battery terminal connection device of the present invention is located on the side.

[0051] Figure 7 This is a schematic diagram of the installation of a battery pack assembly in which the battery terminal connection device of the present invention is located on the end surface.

[0052] Description of Reference Numerals

[0053] Connecting device 100, second connector 1, moving mechanism 2, locking structure 21, slide groove 211, first inner circumferential surface 212, second inner circumferential surface 213, step surface 214, starting position 22, locking position 23, limiting area 24, guide groove 25, guide rail 3;

[0054] Battery terminal connection device 200, lock connection portion 201, first connector 202, lock pin 203, pin column 204, pin flange 205;

[0055] Battery Pack 300. DETAILED DESCRIPTION

[0056] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0057] like Figure 1 As shown, the present invention provides a connection device 100, which is used for Figure 2The lock connection part 201 of the battery terminal connection device 200 shown in the figure cooperates, and the lock connection part 201 is fixedly connected to the first connector 202 installed on the battery pack. The connection device 100 includes a second connector 1, a moving mechanism 2 and a driving mechanism. The second connector 1 is used to connect with the first connector 202; the moving mechanism 2 is fixed on the second connector 1, and the moving mechanism 2 is provided with a locking structure 21, and the locking structure 21 is used to cooperate with the lock connection part 201; the locking structure 21 has a starting position 22 and a locking position 23; the driving mechanism (not shown in the figure) can drive the second connector 1 and the moving mechanism 2 to move, so that the lock connection part 201 moves from the starting position 22 of the locking structure 21 to the locking position 23, or moves the lock connection part 201 from the locking position 23 of the locking structure 21 to the starting position 22. Specifically, when the first connector 202 and the second connector 1 need to be locked, the driving mechanism moves the lock connection part 201 from the starting position 22 of the locking structure 21 to the locking position 23, so that the lock connection part 201 is locked in the locking position 23, achieving the locking function; when the first connector 202 and the second connector 1 need to be unlocked, the driving mechanism moves the lock connection part 201 out of the locking position 23 of the locking structure 21, so that the lock connection part 201 can be separated from the moving mechanism 2, achieving the unlocking function. The driving mechanism can be a push rod, a push rod, etc., and one end of the push rod or the push rod contacts the second connector 1 or the moving mechanism 2 to drive the second connector 1 or the moving mechanism 2 to move.

[0058] Figure 2 Shown with Figure 1 The battery terminal connection device 200 that cooperates with the connection device 100 shown in the figure includes a first connector 202 and a lock connection part 201. The first connector 202 is used to connect with the second connector 1; the lock connection part 201 is fixed on the first connector 202, and the lock connection part 201 is used to cooperate with the locking structure 21; when the first connector 202 is connected with the second connector 1, the lock connection part 201 is located at the locking position 23 of the locking structure 21.

[0059] Figure 3 It is a schematic diagram of the combination of the connecting device 100 and the battery terminal connecting device 200. Figure 3The relative position of the first connector 202 and the second connector 1 shown is the position when they just come into contact. At this time, the lock connection part 201 is located at the starting position 22 of the locking structure 21. The driving mechanism can drive the second connector 1 and the moving mechanism 2 to move, so that the second connector 1 gradually moves toward the first connector 202, and the lock connection part 201 gradually moves to the locking position 23 of the locking structure 21; when the lock connection part 201 reaches the locking position 23, the first connector 202 and the second connector 1 are completely aligned to achieve a good connection. In this process, the locking structure 21 and the lock connection part 201 play a role in guiding and aligning the second connector 1; after the first connector 202 and the second connector 1 are fully connected, the locking structure 21 and the lock connection part 201 play the function of locking the first connector 202 and the second connector 1 to each other.

[0060] like Figures 1 to 5 As shown, the locking structure 21 is a slide groove 211, and the lock connection part 201 is a lock pin 203, and the lock pin 203 can slide in the slide groove 211 along the extension direction of the slide groove 211. Through the sliding of the lock pin 203 in the slide groove 211, when the lock pin 203 reaches the locking position 23, the second connector 1 reaches a position of being aligned and connected with the first connector 202.

[0061] The end of the slide slot 211 closer to the first connector 202 is the starting position 22, and the end of the slide slot 211 farther from the first connector 202 is the locking position 23. Through the arrangement of the slide slot 211, the second connector 1 gradually approaches the first connector 202 during the process of the locking pin 203 moving from the starting position 22 of the slide slot 211 to the locking position 23.

[0062] The locking position 23 of the slide groove 211 is provided with a limiting area 24 protruding in the direction of the first connector 202, and the locking pin 203 can fall into the limiting area 24. When the locking pin 203 falls into the limiting area 24, the locking pin 203 is restricted in the limiting area 24, that is, restricted in the locking position 23 of the slide groove 211, thereby achieving the effect of locking the position of the second connector 1. The limiting area 24 can be formed by bending the end of the slide groove 211 away from the battery pack. Specifically, the groove edges on both sides of the slide groove 211 form a tip at the bend, and the tip protrudes in the direction away from the battery pack, so that after the locking pin 203 falls into the limiting area 24, the tip forms a resistance to the locking pin 203, and the locking pin 203 is restricted in the limiting area 24.

[0063] like Figure 4As shown, the moving mechanism 2 is provided with a guide groove 25, which extends from the surface of the moving mechanism 2 to the starting position 22 of the slide groove 211, and the lock pin 203 can move along the guide groove 25 to the starting position 22 of the slide groove 211. When the lock pin 203 approaches the moving mechanism 2, it first enters the guide groove 25, and then moves along the guide groove 25 to the starting position 22 of the slide groove 211. The guide groove 25 plays a guiding role, so that the lock pin 203 can smoothly move to the starting position 22 of the slide groove 211.

[0064] like Figure 5 As shown, the locking pin 203 includes a pin column 204 and a pin flange 205 protruding outwardly along the circumference of the pin column 204; Figure 4 As shown, the inner circumference of the slide groove 211 forms a first inner circumference 212 extending in the circumferential direction and a second inner circumference 213 extending in the circumferential direction. The first inner circumference 212 matches the outer circumference of the pin 204, and the second inner circumference 213 matches the outer circumference of the pin flange 205. When the lock pin 203 slides in the slide groove 211, the pin 204 moves in the groove formed by the first inner circumference 212, and the pin flange 205 moves in the groove formed by the second inner circumference 213. A step surface 214 is formed between the first inner circumference 212 and the second inner circumference 213. When the lock pin 203 slides in the slide groove 211, the pin flange 205 is restricted by the step surface 214, so that the pin flange 205 can only move in the groove formed by the second inner circumference 213, thereby preventing the lock pin 203 from escaping from the slide groove 211 during the sliding process.

[0065] Figure 5 The pin flange 205 of the lock pin 203 shown in the figure is arranged at the end of the pin column 204. In addition to being arranged at the end of the pin column 204, the pin flange 205 can also be arranged at the middle position of the pin column 204. The position of the second inner circumferential surface 213 of the slide groove 211 corresponds to the position of the pin flange 205 on the pin column 204, and is not limited to the position of the second inner circumferential surface 213 of the slide groove 211. Figure 4 Position shown.

[0066] Figure 5 The pin flange 205 shown is in the shape of an annular disk, and one end face of the pin flange 205 contacts the step surface 214 between the first inner circumferential surface 212 and the second inner circumferential surface 213, so that the pin flange 205 can slide on the step surface 214. In addition to the disk-shaped pin flange 205, pin flanges 205 of other shapes (such as pointed or rod-shaped) can achieve the effect of enabling the pin flange 205 to slide on the step surface 214 as long as they have a limiting surface in contact with the step surface 214, thereby preventing the lock pin 203 from falling off the slide groove 211 during the sliding process.

[0067] In this embodiment, the locking structure 21 is a slide groove 211, and the lock connection part 201 is a lock pin 203. The locking structure 21 and the lock connection part 201 can be other combined structures, such as a guide rail slider structure, a connecting rod structure, etc. As long as the combined structure can realize the function of the lock connection part 201 moving between the starting position 22 and the locking position 23 of the locking structure 21, it can be applied to the above-mentioned connection device 100.

[0068] like Figure 1 , Figure 3 As shown, the connection device 100 also includes a guide rail 3, the second connector 1 is mounted on the guide rail 3, and the driving mechanism drives the second connector 1 to move on the guide rail 3. The setting of the guide rail 3 ensures the moving path of the moving mechanism 2, and the guide rail 3 cooperates with the driving mechanism to make the second connector 1 and the moving mechanism 2 move along a preset direction.

[0069] like Figures 1 to 3 As shown, in order to make the second connector 1 move relatively smoothly, there are two moving mechanisms 2 matched with the lock connection part 201, and the two moving mechanisms 2 are respectively located above and below the second connector 1, and each moving mechanism 2 also has two locking structures 21, which are respectively located at the two ends of the moving mechanism 2. Correspondingly, there are four lock connection parts 201, and the multiple lock connection parts 201 are arranged around the first connector 202.

[0070] Through the above arrangement, the lock connection part 201 is dispersed at the four corners of the first connector 202, so that when the first connector 202 moves toward the second connector 1, the force on the first connector 202 is balanced, and the second connector 1 can move smoothly, thereby ensuring the connection stability when the first connector 202 is connected to the second connector 1.

[0071] The number of the moving mechanisms 2 may be greater than two, and a plurality of moving mechanisms 2 may be arranged around the second connector 1; the number of the locking structures 21 may be other numbers, and a plurality of locking structures 21 may be arranged around the second connector 1. By means of the moving mechanisms 2 and / or locking structures 21 arranged around the second connector 1, the forces on the first connector 202 are balanced, and the stability of the movement of the second connector 1 can be ensured. Correspondingly, the number of the locking connection parts 201 is multiple, and a plurality of locking connection parts 201 are arranged around the first connector 202.

[0072] The number of the moving mechanisms 2 may also be an even number, and the even number of moving mechanisms 2 are symmetrically arranged on both sides of the second connector 1. The locking structures 21 on the symmetrically arranged moving mechanisms 2 may also be symmetrically arranged. By symmetrically arranged moving mechanisms 2 and / or locking structures 21, the forces on the first connector 202 are balanced, and the stability of the movement of the second connector 1 can be ensured.

[0073] The above-mentioned connection device 100 can be installed in the battery holder in the electric vehicle, or in the battery compartment of the battery swap station. The first connector 202 can be an electrical connector, and the second connector 1 is also an electrical connector; when the lock connection part 201 moves to the locking position 23, the first connector 202 and the second connector 1 are electrically connected. Among them, the driving mechanism can be a device outside the battery holder of the electric vehicle or outside the battery compartment, such as a battery swapping device, a battery transport device, etc., or it can be a connecting rod, a lead screw, a motor and other equipment installed in the battery holder or the battery compartment of the electric vehicle.

[0074] The battery terminal connection device 200 is mounted on the battery pack 300 to form a battery pack assembly, such as Figure 6 and Figure 7 shown. Figure 6 The battery terminal connection device 200 of the battery pack assembly shown is installed on the side of the battery pack 300, and Figure 7 The battery terminal connection device 200 of the battery pack assembly shown is installed on the end surface of the battery pack 300. The above-mentioned battery terminal connection device 200 can be installed on any surface of the battery pack 300; the installation position of the battery terminal connection device 200 is set according to the position of the connection device 100 in the battery holder of the electric vehicle or the battery compartment of the battery swap station. In particular, when the battery terminal connection device 200 needs to be installed on the side of the battery pack 300, since the movement direction of the battery pack 300 is inconsistent with the connection and locking direction of the connection device 100 and the battery terminal connection device 200, the movement of the battery pack 300 cannot form a compression force on the connection between the connection device 100 and the battery terminal connection device 200. However, through the structural design of the above-mentioned connection device 100 and the battery terminal connection device 200, the connection and locking between the connection device 100 and the battery terminal connection device 200 can be easily realized, which solves the design problem of the battery terminal connection device 200 installed on the side of the battery pack 300.

[0075] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A connection device, used to cooperate with a lock connection part, the lock connection part is fixedly connected to a battery pack, the battery pack has a first connector, characterized in that: The connecting device comprises: a second connector, the second connector being used to connect with the first connector; A moving mechanism, the moving mechanism is fixed on the second connector, the moving mechanism is provided with a locking structure, the locking structure is used to cooperate with the lock connection part; the locking structure has a starting position and a locking position; The locking structure is a slide groove, the lock connection part is a lock pin, and the lock pin can slide in the slide groove along the extension direction of the slide groove; The locking pin includes a pin column and a pin flange protruding outward along the circumference of the pin column; the inner circumferential surface of the slide groove forms a first inner circumferential surface extending along the circumferential direction and a second inner circumferential surface extending along the circumferential direction, the first inner circumferential surface cooperates with the outer circumferential surface of the pin column, and the second inner circumferential surface cooperates with the outer circumferential surface of the pin flange; when the locking pin slides in the slide groove, the pin column moves in the groove formed by the first inner circumferential surface, and the pin flange moves in the groove formed by the second inner circumferential surface.

2. The connection device according to claim 1, characterized in that The end of the slide slot closer to the first connector is a starting position, and the end of the slide slot farther from the first connector is a locking position.

3. The connection device according to claim 1 or 2, characterized in that: The locking position of the slide slot is provided with a limiting area protruding toward the first connector, and the locking pin can fall into the limiting area.

4. The connection device according to claim 1, characterized in that: The moving mechanism is provided with a guide groove, and the guide groove extends from the surface of the moving mechanism to the starting position of the slide groove, and the locking pin can move along the guide groove to the starting position of the slide groove.

5. The connection device according to claim 1, characterized in that: The connecting device further comprises a driving mechanism, which can drive the second connector and the moving mechanism to move, so that the lock connecting part moves from the starting position of the locking structure to the locking position. The connecting device further comprises a guide rail, the second connector is mounted on the guide rail, and the driving mechanism drives the second connector to move on the guide rail; And / or, there are multiple moving mechanisms, and the multiple moving mechanisms are arranged around the second connector; And / or, there are multiple locking structures, and the multiple locking structures are arranged around the second connector; And / or, the number of the moving mechanisms is an even number, and the even number of the moving mechanisms are symmetrically arranged on both sides of the second connector.

6. An electric vehicle, characterized in that: The electric vehicle comprises the connecting device according to any one of claims 1 to 5.

7. A battery terminal connection device, characterized in that: include: A first connector, the first connector being used to connect to the second connector of the connecting device according to any one of claims 1 to 5; A locking connection portion, wherein the locking connection portion is fixed on the first connector, and the locking connection portion is used to cooperate with the locking structure of the connection device described in any one of claims 1 to 5; when the first connector is connected to the second connector, the locking connection portion is located in the locking position of the locking structure.

8. The battery terminal connection device according to claim 7, characterized in that: There are multiple lock connection parts, and the multiple lock connection parts are arranged around the first connector.

9. A battery pack assembly, characterized in that: The battery pack assembly includes the battery terminal connection device as described in claim 7 or 8.

10. The battery pack assembly according to claim 9, characterized in that: The battery pack assembly includes a battery pack, and the battery terminal connection device is located on a side of the battery pack.

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