CN215816478U - Electric connection structure - Google Patents

Abstract

The utility model provides an electric connection structure, which is used for connecting a battery module and a control circuit board, wherein the battery module is placed in a battery pack, a gap is formed between the battery module and the surface of the control circuit board, the electric connection structure is positioned in the gap, the first end of the electric connection structure is electrically connected with the battery module, and the second end of the electric connection structure is electrically connected with the control circuit board. The utility model improves the space utilization rate and the safety and reliability.

Description

Electric connection structure

Technical Field

The utility model relates to the technical field of electric connection, in particular to an electric connection structure.

Background

With the rapid development of social economy, the lithium battery pack is increasingly widely applied in various fields, and is particularly gradually popularized in the fields of new energy, electric automobiles, electric energy storage and the like. The battery pack is generally formed by connecting a plurality of battery modules in series or in parallel to form a battery module and installing the battery module in a box, each battery module is formed by connecting a plurality of single batteries in series or in parallel, and the larger the capacity of the battery pack is, the more battery modules and single batteries are assembled. In particular, the connection of each BATTERY module within the BATTERY pack to a BATTERY management system (BATTERY MANAGEMENT SYSTEM, BMS) becomes important.

At present, there are generally two connection methods for connecting the existing battery module and the battery management system BMS. The first connection mode is as follows: one wire is led out from the positive pole of each battery module in the battery pack and is connected with the BMS board; the second connection mode is as follows: be equipped with curved type guide plate on the current conducting plate in the battery package outside, the breach on the BMS board is passed to the guide plate, and is higher than the BMS board, utilizes the difference in height between BMS board and the curved type guide plate, is connected the guide plate with the BMS board is electric.

However, in the connection method of the battery module and the battery management system BMS in the prior art, according to the first connection method, in the battery pack, a plurality of scattered wire harnesses are required to be in the battery pack, and each wire is required to be manually welded, and each wire is wound outside the battery pack according to the position of a connection point; according to the second connection mode, a bent guide plate is required to be arranged on the current-conducting plate, and a notch matched with the bent guide plate is specially formed in the BMS plate. The two modes not only influence the arrangement attractiveness of the internal layout of the box body, but also increase a large amount of workload.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an electric connection structure, which improves the space utilization rate and the safety and reliability.

The utility model provides an electric connection structure, which is used for connecting a battery module and a control circuit board, wherein the battery module is placed in a battery pack, a gap is formed between the battery module and the surface of the control circuit board, the electric connection structure is positioned in the gap, the first end of the electric connection structure is electrically connected with the battery module, and the second end of the electric connection structure is electrically connected with the control circuit board. Specifically, a gap is formed between the plate surfaces of the battery module and the control circuit board, the gap is perpendicular to the control circuit board, the battery pack comprises an upper box cover and a lower box body, the upper box cover and the lower box body jointly enclose a containing cavity capable of containing the battery module, namely, the gap is formed between the plate surfaces of the battery pack and the control circuit board. The electric connection structure is positioned in the gap, and the battery module in the battery pack is connected with the control circuit board by utilizing the gap between the battery module and the board surface of the control circuit board, so that the current of the battery module is led out, the space occupation ratio is reduced, and the space utilization rate and the safety and reliability are improved.

According to the above electrical connection structure, optionally, the battery pack is provided with a conductive plate, and a first end of the conductive plate is electrically connected with the battery pack; the second end of the conductive plate faces the control circuit board and forms a gap with the control circuit board. Specifically, the first end of current conducting plate is connected with battery package electricity, is equipped with a plurality of supports on the battery package, carries out the electricity between the first end of current conducting plate and a plurality of supports and is connected, guarantees that battery module's electric current passes through a plurality of supports drainage to the current conducting plate in the battery package. The second end of the conductive plate faces the plate surface of the control circuit board and forms a gap with the plate surface of the control circuit board, and the electric connection structure is located in the gap.

As in the above-mentioned electrical connection structure, optionally, the electrical connection structure includes a first connection member and a second connection member, the first connection member is disposed on the control circuit board, the second connection member is disposed on the conductive plate, and the first connection member and the second connection member are electrically connected. Specifically, the first end of the first connecting piece is detachably or fixedly connected to the control circuit board, and the second end of the first connecting piece faces the current conducting plate; the first end of the second connecting piece is detachably or fixedly connected to the conducting plate, and the second end of the second connecting piece faces the control circuit board. The connection mode between the second end of the first connection piece and the second end of the second connection piece is not limited too much, and for example, the structures of the second end of the first connection piece and the second end of the second connection piece are correspondingly processed, so that the second end of the first connection piece and the second end of the second connection piece are connected in a clamping manner; or the second end of the first connecting piece extends into the second end space of the second connecting piece and is buckled at the second end of the second connecting piece, so long as the electric connection between the first connecting piece and the second connecting piece can be ensured.

According to the above electrical connection structure, optionally, the first connecting member includes a first base, two opposite sides of the first base are connected with a plurality of supporting portions, and ends of the supporting portions, which are away from the first base, are in contact conduction with the control circuit board. Specifically, the relative both sides of first base are connected with a plurality of supporting parts, and perhaps the relative both sides of first base extend respectively towards control circuit board's face and form a plurality of supporting parts, and a plurality of supporting parts are connected with control circuit board and are switched on.

As in the above-mentioned electrical connection structure, optionally, the second connecting member includes a second base, and two opposite sides of the second base have a plurality of connecting portions, and the plurality of connecting portions have connecting surfaces that are in contact with the conductive plate. Specifically, the relative both sides of second base are connected with a plurality of connecting portion, and perhaps the relative both sides of second base extend respectively towards the face of current conducting plate and form a plurality of connecting portion, and the connection face and the current conducting plate contact of a plurality of connecting portion switch on.

In the above electrical connection structure, optionally, gaps are provided between the first base and the control circuit board, and between the second base and the conductive plate in the vertical direction. Specifically, a gap is formed between the first base and the control circuit board, so that the weight of the first connecting piece can be reduced while the current conduction between the first base and the control circuit board is ensured; in a similar way, a gap is also formed between the second base and the conducting plate vertically, so that the weight of the second connecting piece can be reduced while the current conduction between the second base and the conducting plate is ensured. Meanwhile, gaps between the first base and the control circuit board and gaps between the second base and the conducting plate in the vertical direction can effectively reduce heat accumulation caused by current conduction, and the heat dissipation function is improved.

As in the above-mentioned electrical connection structure, optionally, the electrical connection structure further includes a third connecting member, and the first connecting member, the third connecting member and the second connecting member are sequentially connected between the control circuit board and the conductive plate. Specifically, in order to improve the stability of connection between the first connecting piece and the second connecting piece, a third connecting piece is added, and the first connecting piece and the second connecting piece are connected between the control circuit board and the current-conducting plate through the third connecting piece.

According to the above electrical connection structure, optionally, a first connection hole is formed in the first base, a second connection hole matched with the first connection hole is formed in the second base, and the third connection member connects the first connection member and the second connection member together through the first connection hole and the second connection hole. Specifically, the first connecting hole corresponds to the second connecting hole in position, and the third connecting member can pass through the first connecting hole and the second connecting hole to connect the first connecting member and the second connecting member together.

As in the above-mentioned electrical connection structure, optionally, the third connecting member includes a screw, and a thread matching with the screw is provided in the second connecting hole. Specifically, in order to save cost, the third connecting member is a bolt, wherein a screw of the third connecting member can pass through the second connecting hole and is matched with a thread in the second connecting hole, so that the screw is connected to the second base.

As for the above electrical connection structure, optionally, the third connecting member further includes a nut, the nut is connected to the screw, the first base has a protrusion, the protrusion faces the second base, the first connecting hole passes through the protrusion, the screw passes through the first connecting hole and is screwed into the second connecting hole, and the nut abuts against an edge of the protrusion. Specifically, the nut and the screw rod integrated into one piece of third connecting piece, and the cross section of nut is greater than the cross section of screw rod, and when the screw rod passed first connecting hole screw in second connecting hole, the nut butt was at the edge of lug, and then guaranteed to be connected between first connecting piece and the second connecting piece.

The utility model provides an electric connection structure, which is used for connecting a battery module and a control circuit board, wherein the battery module is placed in a battery pack, a gap is formed between the battery module and the surface of the control circuit board, the electric connection structure is positioned in the gap, the first end of the electric connection structure is electrically connected with the battery module, and the second end of the electric connection structure is electrically connected with the control circuit board. Specifically, the electric connection structure is positioned in the gap, and the battery module and the control circuit board in the battery pack are connected by utilizing the gap between the battery module and the board surface of the control circuit board, so that the current of the battery module is led out, the space occupation ratio is reduced, and the space utilization rate and the safety and reliability are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view illustrating a first view angle of a battery module connected to a control circuit board according to the prior art;

FIG. 2 is a schematic diagram of a second view angle of the connection between a battery module and a control circuit board in the prior art;

fig. 3 is a schematic structural diagram of an electrical connection structure provided in an embodiment of the present application;

fig. 4 is a cross-sectional view of an electrical connection structure provided in an embodiment of the present application;

fig. 5 is an exploded view of an electrical connection structure provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first connecting element in an electrical connection structure provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a second connection element in an electrical connection structure provided in an embodiment of the present application.

Description of reference numerals:

1-a first connector;

10-an electrical connection structure;

11-a first base;

111-a support;

112-a first connection hole;

113-a bump;

2-a second connector;

21-a second base;

211-a connecting portion;

212-second connection hole;

3-a third connector;

31-a screw;

32-screw cap;

20-a battery pack;

30-a conductive plate;

40-a control circuit board;

41-mounting hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are partial embodiments of the present invention, not full embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. All other embodiments obtained are within the scope of protection of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other in the inner cavities or the interaction relationship of the two components. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be noted that, in the description of the present invention, the terms "first", "second" and "third" are used merely for convenience in describing different cavity elements, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.

Fig. 1 is a first perspective view illustrating a connection between a battery module and a control circuit board in the related art, and fig. 2 is a second perspective view illustrating a connection between a battery module and a control circuit board in the related art, and generally there are two connection methods as shown in fig. 1 and 2. The first connection mode is as follows: one wire is led out from the positive pole of each battery module in the battery pack and is connected with the BMS board; the second connection mode is as follows: be equipped with curved type guide plate on the current conducting plate in the battery package outside, the breach on the BMS board is passed to the guide plate, and is higher than the BMS board, utilizes the difference in height between BMS board and the curved type guide plate, is connected the guide plate with the BMS board is electric. However, in the connection method of the battery module and the battery management system BMS in the prior art, according to the first connection method, in the battery pack, a plurality of scattered wire harnesses are required to be in the battery pack, and each wire is required to be manually welded, and each wire is wound outside the battery pack according to the position of a connection point; according to the second connection mode, a bent guide plate is required to be arranged on the current-conducting plate, and a notch matched with the bent guide plate is specially formed in the BMS plate. The two modes not only influence the arrangement attractiveness of the internal layout of the box body, but also increase a large amount of workload.

In order to overcome the defects in the prior art, the utility model provides the electric connection structure, which utilizes the gap between the battery module and the panel of the control circuit board, the electric connection structure is positioned in the gap, and the battery module in the battery pack is connected with the control circuit board, so that the current of the battery module is led out, the space occupation ratio is reduced, and the space utilization rate and the safety and reliability are improved.

The present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art can more clearly understand the contents of the present invention in detail.

Fig. 3 is a schematic structural diagram of an electrical connection structure provided in an embodiment of the present application, fig. 4 is a cross-sectional view of the electrical connection structure provided in the embodiment of the present application, and fig. 5 is an exploded view of the electrical connection structure provided in the embodiment of the present application, as shown in fig. 3 to fig. 5, an electrical connection structure 10 is provided in an embodiment of the present application, and is used for connecting a battery module and a control circuit board 40, the battery module is placed in a battery pack 20, a gap is formed between the battery module and a board surface of the control circuit board 40, the electrical connection structure 10 is located in the gap, a first end of the electrical connection structure 10 is electrically connected to the battery module, and a second end of the electrical connection structure 10 is electrically connected to the control circuit board 40. Specifically, a gap is formed between the battery module and the surface of the control circuit board 40, the gap is perpendicular to the control circuit board 40, the battery pack 20 includes an upper case cover and a lower case body, the upper case cover and the lower case body jointly enclose a containing cavity which can be used for containing the battery module, that is, a gap is also formed between the surfaces of the battery pack 20 and the control circuit board 40. The electrical connection structure 10 is located in the gap, and the battery module in the battery pack 20 is connected to the control circuit board 40 by using the gap between the battery module and the board surface of the control circuit board 40, so that the current of the battery module is led out, the space occupation ratio is reduced, and the space utilization rate and the safety and reliability are improved.

Alternatively, the electrical connection between the first end of the electrical connection structure 10 and the battery module and between the second end of the electrical connection structure 10 and the control circuit board 40 may be performed by general welding, laser welding, ultrasonic welding, resistance welding, gas flame welding, arc welding, electron beam welding, friction welding, or the like. The laser welding utilizes laser pulse to melt a workpiece, so that the molten metal is integrated to complete welding, the welding is stable and does not influence other structures, and the specific connection mode can be determined according to actual conditions.

In an alternative embodiment, the battery pack 20 is provided with a conductive plate 30, and a first end of the conductive plate 30 is electrically connected to the battery pack 20; the second end of the conductive plate 30 faces the control circuit board 40 and forms a gap with the control circuit board 40. Specifically, the first end of current-conducting plate 30 is connected with battery package 20 electricity, is equipped with a plurality of supports on the battery package 20, and the electricity is connected between the first end of current-conducting plate 30 and a plurality of supports, guarantees that battery module's electric current passes through a plurality of supports drainage to current-conducting plate 30 in the battery package 20. The second end of the conductive plate 30 faces the board surface of the control circuit board 40, and a gap is formed between the second end and the board surface of the control circuit board 40, and the electrical connection structure 10 is located in the gap.

In an alternative embodiment, the electrical connection structure 10 includes a first connector 1 and a second connector 2, the first connector 1 is disposed on the control circuit board 40, the second connector 2 is disposed on the conductive plate 30, and the first connector 1 and the second connector 2 are electrically connected. Specifically, as shown in fig. 3, 4 and 5, a first end of the first connecting member 1 is detachably or fixedly connected to the control circuit board 40, and a second end of the first connecting member 1 faces the conductive plate 30; a first end of the second connector 2 is detachably or fixedly coupled to the conductive plate 30, and a second end of the second connector 2 faces the control circuit board 40. The connection mode between the second end of the first connection member 1 and the second end of the second connection member 2 is not limited too much, and for example, the structures of the second end of the first connection member 1 and the second end of the second connection member 2 are correspondingly processed, so that the second end of the first connection member 1 and the second end of the second connection member 2 are connected in a clamping manner; or the second end of the first connecting piece 1 extends into the second end space of the second connecting piece 2 and is buckled at the second end of the second connecting piece 2, so long as the electrical connection between the first connecting piece 1 and the second connecting piece 2 can be ensured.

Optionally, the first connecting member 1 and the second connecting member 2 are made of a metal with high electrical conductivity, such as copper, gold, silver, aluminum, tin, zinc, and the like, and the specific requirement is determined according to actual needs.

In an alternative embodiment, the first connector 1 includes a first base 11, a plurality of supporting portions 111 are connected to two opposite sides of the first base 11, and ends of the plurality of supporting portions 111 facing away from the first base 11 are in contact conduction with the control circuit board 40. Specifically, fig. 6 is a schematic structural diagram of a first connecting element in an electrical connection structure provided in the embodiment of the present application, as shown in fig. 5 and 6, two opposite sides of the first base 11 are connected with a plurality of supporting portions 111, or two opposite sides of the first base 11 respectively extend toward a board surface of the control circuit board 40 to form a plurality of supporting portions 111, and the plurality of supporting portions 111 are connected and conducted with the control circuit board 40.

Optionally, the structural performance requirements of each part in the first connecting member 1 are different, the materials of each part may be different, and the specific material is determined according to the actual production needs.

Optionally, the first base 11 is sheet-shaped, the plurality of supporting portions 111 on two sides are bent toward the control circuit board 40 along the horizontal direction of the first base 11, and specifically, two supporting portions 111 are respectively disposed on two opposite sides of the first base 11.

In an alternative embodiment, the second connector 2 includes a second base 21, and the second base 21 has a plurality of connection portions 211 at opposite sides thereof, and the plurality of connection portions 211 have connection surfaces in contact with the conductive plates 30. Specifically, fig. 7 is a schematic structural diagram of a second connection member in the electrical connection structure provided in the embodiment of the present application, as shown in fig. 5 and 7, two opposite sides of the second base 21 are connected with a plurality of connection portions 211, or two opposite sides of the second base 21 extend toward the plate surface of the conductive plate 30 to form a plurality of connection portions 211, and the connection surfaces of the plurality of connection portions 211 are in contact with the conductive plate 30.

Optionally, the first base 11 and the second base 21 are in contact connection with each other, so that the current of the battery module in the battery pack 20 is drained to the conductive plate 30 through the plurality of brackets, and the current on the conductive plate 30 is ensured to be conducted to the first base 11 of the first connecting member 1 through the second base 21 of the second connecting member 2 and then to the control circuit board 40, so that the current of the battery module is led out.

Optionally, the first base 11 and the second base 21 may be further conducted by welding, wherein the thicknesses of the first base 11 and the second base 21 are both 0.8-4.0mm, the first base 11 and the second base 21 within the thickness numerical range are stable and are not easy to fall off, and the overcurrent capability of the first base meets the conductive requirement of the battery module. The first base 11 and the second base 21 which are too thick increase the difficulty of welding, and the first base 11 and the second base 21 which are too thin are easy to be blown due to overheating in the conducting process.

In an alternative embodiment, there are gaps between the first base 11 and the control circuit board 40, and between the second base 21 and the conductive plate 30 vertically. Specifically, a gap is formed between the first base 11 and the control circuit board 40, so that the weight of the first connecting piece 1 can be reduced while current conduction between the first base 11 and the control circuit board 40 is ensured; similarly, a gap is formed between the second base 21 and the conductive plate 30 in the vertical direction, so that the weight of the second connecting piece 2 can be reduced while current conduction between the second base 21 and the conductive plate 30 is ensured. Meanwhile, gaps between the first base 11 and the control circuit board 40 and gaps between the second base 21 and the conductive plate 30 in the vertical direction can effectively reduce heat accumulation caused by current conduction, and the heat dissipation function is increased.

In an alternative embodiment, the electrical connection structure 10 further includes a third connector 3, and the first connector 1, the third connector 3 and the second connector 2 are sequentially connected between the control circuit board 40 and the conductive plate 30. Specifically, as shown in fig. 3, 4 and 5, in order to improve the stability of the connection between the first connector 1 and the second connector 2, a third connector 3 is added, and the first connector 1 and the second connector 2 are connected between the control circuit board 40 and the conductive plate 30 through the third connector 3.

Optionally, the third connecting member 3 is located between the first connecting member 1 and the second connecting member 2, a first end of the third connecting member 3 is connected to the first base 11, and a second end of the third connecting member 3 is connected to the second base 21.

In an alternative embodiment, the first base 11 is provided with a first connection hole 112, the second base 21 is provided with a second connection hole 212 matching with the first connection hole 112, and the third connecting member 3 connects the first connecting member 1 and the second connecting member 2 together through the first connection hole 112 and the second connection hole 212. Specifically, as shown in fig. 6 and 7, the first connection hole 112 and the second connection hole 212 are positioned correspondingly, and the third connection member 3 can pass through the first connection hole 112 and the second connection hole 212 to connect the first connection member 1 and the second connection member 2 together.

Optionally, the third connecting member 3 is designed to have a shape matching the first connecting hole 112 and the second connecting hole 212 while the third connecting member 3 is prevented from shaking in the first connecting hole 112 or in the second connecting hole 212 while passing through the first connecting hole 112 and the second connecting hole 212.

In an alternative embodiment, the third connecting member 3 comprises a screw 31, and the second connecting hole 212 is provided with a thread matching with the screw 31. Specifically, as shown in fig. 5, 6 and 7, in order to save cost, the third connecting member 3 is a bolt, and the control circuit board 40 is provided with a mounting hole 41, wherein the screw 31 of the third connecting member 3 sequentially passes through the mounting hole 41, the first connecting hole 112 and the second connecting hole 212 and is matched with the thread in the second connecting hole 212, so that the screw 31 is connected to the second base 21.

In an alternative embodiment, the third connecting member 3 further includes a nut 32, the nut 32 is connected to the screw 31, the first base 11 has a protrusion 113 thereon, the protrusion 113 faces the second base 21, the first connecting hole 112 passes through the protrusion 113, the screw 31 passes through the first connecting hole 112 and is screwed into the second connecting hole 212, and the nut 32 abuts on an edge of the protrusion 113. Specifically, the nut 32 of the third connecting member 3 is integrally formed with the screw 31, and the cross section of the nut 32 is larger than that of the screw 31, so that when the screw 31 passes through the first connecting hole 112 and is screwed into the second connecting hole 212, the nut 32 abuts against the edge of the projection 113, thereby ensuring the connection between the first connecting member 1 and the second connecting member 2.

Optionally, the protrusion 113 extends outwards around the periphery of the first connection hole 112 and is integrally formed with the first base 11, and the area of the protrusion 113 is smaller than the area of the first base 11 and larger than the area of the second connection hole 212, that is, the protrusion 113 is located between the first base 11 and the second base 21, so as to increase the stability of the connection between the first connection member 1 and the second connection member 2 and prevent the first connection member 1 and the second connection member 2 from sliding together.

The electric connection structure that this application embodiment provided for be connected between battery module and the control circuit board, battery module places in the battery package, has the clearance between battery module and the control circuit board's face, and electric connection structure is located the clearance, and electric connection structure's first end is connected with the battery module electricity, and electric connection structure's second end is connected with the control circuit board electricity. Specifically, the electric connection structure is positioned in the gap, and the battery module and the control circuit board in the battery pack are connected by utilizing the gap between the battery module and the board surface of the control circuit board, so that the current of the battery module is led out, the space occupation ratio is reduced, and the space utilization rate and the safety and reliability are improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can still be modified, or the technical features of the partial or full cavities therein can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides an electric connection structure for be connected between battery module and the control circuit board, battery module places in the battery package, its characterized in that, battery module with the clearance has between the face of control circuit board, electric connection structure is located in the clearance, electric connection structure's first end with battery module electricity is connected, electric connection structure's second end with the control circuit board electricity is connected.

2. The electrical connection structure according to claim 1, wherein the battery pack is provided with a conductive plate, and a first end of the conductive plate is electrically connected to the battery pack; the second end of the conductive plate faces the control circuit board and forms the gap with the control circuit board.

3. The electrical connection structure according to claim 2, wherein the electrical connection structure includes a first connector provided on the control circuit board and a second connector provided on the conductive plate, the first connector and the second connector being electrically connected to each other.

4. The electrical connection structure as claimed in claim 3, wherein the first connector comprises a first base, a plurality of supporting portions are connected to two opposite sides of the first base, and ends of the supporting portions, which are away from the first base, are in contact conduction with the control circuit board.

5. The electrical connection structure as claimed in claim 4, wherein the second connecting member includes a second base having a plurality of connecting portions on opposite sides thereof, the plurality of connecting portions having connecting surfaces in contact with the conductive plates.

6. The electrical connection structure according to claim 5, wherein a gap is provided between the first base and the control circuit board and between the second base and the conductive plate in a vertical direction.

7. The electrical connection structure according to claim 5 or 6, further comprising a third connecting member, the first connecting member, the third connecting member and the second connecting member being connected in sequence between the control circuit board and the conductive plate.

8. The electrical connection structure as claimed in claim 7, wherein the first base is provided with a first connection hole, the second base is provided with a second connection hole matching the first connection hole, and the third connecting member connects the first connecting member and the second connecting member together through the first connection hole and the second connection hole.

9. The electrical connection structure as claimed in claim 8, wherein the third connecting member includes a screw, and a thread matching the screw is provided in the second connecting hole.

10. The electrical connection structure as claimed in claim 9, wherein the third connector further comprises a nut, the nut is connected to the screw, the first base has a protrusion thereon, the protrusion faces the second base, the first connection hole passes through the protrusion, the screw passes through the first connection hole and is screwed into the second connection hole, and the nut abuts against an edge of the protrusion.

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