CN215266572U - Connection structure, battery package and energy storage equipment - Google Patents

Abstract

The application discloses a connecting structure, a battery pack and energy storage equipment, wherein the connecting structure comprises a first connecting sheet, a second connecting sheet, a first substrate and a conducting sheet, and one end of the first connecting sheet is connected with the positive pole or the negative pole of a first battery module; one end of the second connecting sheet is connected with the positive electrode or the negative electrode of the second battery module; the first substrate is provided with a first connecting hole and a second connecting hole; the conducting plate is arranged on the first substrate; the other end of the first connecting sheet penetrates through the first connecting hole and is electrically connected with the conducting strip, and the other end of the second connecting sheet penetrates through the second connecting hole and is electrically connected with the conducting strip. The utility model discloses a connection structure establishes ties through first base plate through setting up first battery module and second battery module, and connection reliability is high, and the conducting strip overflows evenly moreover, can avoid appearing the overheated problem of current transmission point too concentrated lead to the battery module.

Description

Connection structure, battery package and energy storage equipment

Technical Field

The application relates to the technical field of energy storage equipment, in particular to a connection structure, a battery pack and energy storage equipment.

Background

The battery pack in the energy storage device generally adopts a mode of connecting a plurality of battery modules in series and parallel to obtain larger capacity and output current. In current energy storage equipment battery package, the mode that the series-parallel connection between a plurality of battery modules adopted the insulated wire to connect is realized, need complicated insulated wire welding link, there is the not firm condition of welding in the insulated wire welding on the one hand, make the insulated wire drop easily, the reliability is low, on the other hand adopts wire welded mode, the transmission point of electric current is too concentrated, the temperature of tie point is difficult to control, there is the overheated risk of battery module, and the nickel piece or the direct welding operation of copper sheet of different battery modules are inconvenient, the risk that the welding slag dropped into in the battery module probably appears, there is the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

In view of this, this application has proposed connection structure, battery package and energy storage equipment.

The connection structure that this application first aspect provided for connect first battery module and second battery module, connection structure includes: one end of the first connecting sheet is connected with the positive electrode or the negative electrode of the first battery module; one end of the second connecting sheet is connected with the positive electrode or the negative electrode of the second battery module; the circuit board comprises a first substrate, a second substrate and a third substrate, wherein the first substrate is provided with a first connecting hole and a second connecting hole; the conducting plate is arranged on the first substrate; the other end of the first connecting sheet penetrates through the first connecting hole and is electrically connected with the conducting strip, and the other end of the second connecting sheet penetrates through the second connecting hole and is electrically connected with the conducting strip.

A battery pack according to a second aspect of the present application includes: a first battery module; a second battery module; the above-described connecting structure; the connecting structure is respectively connected with the first battery module and the second battery module so as to electrically connect the first battery module and the second battery module.

The energy storage device provided by the third aspect of the present application includes: a housing having a receiving cavity; a battery pack according to any one of the above; the battery pack is arranged in the accommodating cavity and is fixedly connected with the shell.

According to the technical scheme, the connection structure provided by the application is characterized in that the first battery module and the second battery module are electrically connected through the first base plate, the first base plate can be welded at a high temperature or mechanically connected at a high strength, the operation is convenient, the connection reliability of the first battery module and the second battery module is improved, the conducting strip is uniform in overcurrent, and the problem that the battery modules are overheated due to too concentrated current transmission points can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a connection structure and a battery pack according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a connection structure and a battery pack according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of the second battery module shown in fig. 2;

FIG. 4 is a schematic structural view of the first substrate shown in FIG. 2;

FIG. 5 is an enlarged partial schematic view at A in FIG. 3;

FIG. 6 is an enlarged partial schematic view at B in FIG. 3;

fig. 7 is a schematic diagram of connection between a first conductive member and a first connection pad or between a second conductive member and a second connection pad according to an embodiment of the present application;

FIG. 8 is a schematic structural view of the voltage acquisition board and the control circuit board shown in FIG. 2;

fig. 9 is another exploded view of a battery pack according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an energy storage device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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 application.

It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As shown in fig. 1 to 4, the embodiment of the present application proposes a connection structure 30 for connecting a first battery module 10 and a second battery module 20. The connection structure 30 includes a first connection pad 31, a second connection pad 32, a conductive pad (not shown), and a first substrate 33. The conductive sheet is disposed on the first substrate 33, and the first substrate 33 is provided with a first connection hole 331 and a second connection hole 332. One end of the first connection tab 31 is connected to the positive electrode or the negative electrode of the first battery module 10, and the other end of the first connection tab 31 is inserted into the first connection hole 331 and electrically connected to the conductive tab. One end of the second connecting piece 32 is connected to the positive electrode or the negative electrode of the second battery module 20, and the other end of the second connecting piece 32 is inserted into the second connecting hole 332 and electrically connected to the conductive piece, so that the first battery module 10 and the second battery module 20 are connected in series or in parallel.

For example, when the first connecting piece 31 is connected to the negative electrode of the first battery module 10 and the second connecting piece 32 is connected to the positive electrode of the second battery module 20, the first battery module 10 and the second battery module 20 are connected in series; when the first connecting piece 31 is connected to the negative electrode of the first battery module 10 and the second connecting piece 32 is connected to the negative electrode of the second battery module 20, the first battery module 10 and the second battery module 20 are connected in parallel.

After adopting foretell scheme, establish ties through first base plate 33 through setting up first battery module 10 and second battery module 20, high temperature resistant welding or high strength mechanical connection can be realized to first base plate 33, have improved the reliability that first battery module 10 and second battery module 20 establish ties, and moreover, the conducting strip overflows evenly, can avoid appearing the overheated problem of battery module that current transmission point too concentrates on leading to.

In some embodiments, the first connecting piece 31 includes a plurality of first sub-connecting portions 311 arranged side by side at intervals, the number of the first connecting holes 331 is plural, for example, the first connecting holes 3311 can be divided into a plurality of first sub-connecting holes 3311 arranged side by side at intervals, and the plurality of first sub-connecting portions 311 are correspondingly inserted into the plurality of first connecting holes 3311. In this design, the connection strength between the first connection piece 31 and the first substrate 33 can also be increased while the mechanical properties of the first substrate 33 are retained. Of course, the first connection plate 31 and the first connection hole 331 are not limited to the above arrangement, for example, in some other embodiments, the first connection plate 31 is configured as a complete plate, the first connection hole 331 is configured as an elongated through hole, and the first connection plate 31 is integrally disposed in the through hole.

In some embodiments, the second connecting piece 32 includes a plurality of second sub-connecting portions 321 arranged side by side at intervals, the number of the second connecting holes 332 is multiple, for example, the second connecting holes 332 can be divided into a plurality of second connecting holes 3321 arranged side by side at intervals, and the plurality of second sub-connecting portions 321 are arranged through the plurality of second connecting holes 3321 in a one-to-one correspondence. Similarly, the connection mode can also increase the connection strength between the second connecting sheet 32 and the first substrate 33 under the condition of keeping the mechanical performance of the first substrate 33. Of course, the second connecting plate 32 and the second connecting hole 332 are not limited to the above arrangement, for example, in other embodiments, the second connecting plate 32 is configured as a complete plate, the second connecting hole 332 is configured as an elongated through hole, and the second connecting plate 32 is integrally disposed in the through hole.

In some embodiments, the first sub-connection portion 311 is fixed to the first substrate 33 by soldering. This design can improve the reliability of the connection between the first sub-connection portion 311 and the first substrate 33. Of course, the first sub-connection portion 311 and the first substrate 33 are not limited to be fixed by welding, for example, in some other embodiments, the first sub-connection portion 311 and the first sub-connection hole 3311 may be connected by interference fit.

In some embodiments, the second sub-connection portion 321 is fixed to the first substrate 33 by welding. Similarly, soldering can improve the reliability of the connection of the second sub-connection portion 321 and the first substrate 33. Of course, the second sub-connecting portion 321 and the first substrate 33 are not limited to be fixed by welding, for example, in some other embodiments, the second sub-connecting portion 321 and the second connecting hole 3321 may also be connected by interference fit.

In some embodiments, the first substrate 33 may include two stacked substrates, the conductive sheet may be a copper foil, and the conductive sheet is sandwiched between the two substrates, one end of the conductive sheet extends into the first connection hole 331 or around the first connection hole 331, and the other end extends into the second connection hole 332 or around the second connection hole 332, so that the first connection sheet 31 and the second connection sheet 32 are electrically connected to the conductive sheet more easily. In other embodiments, the conductive sheet may be a copper foil coated or adhered on the first substrate 33, and the first connecting sheet 31 and the second connecting sheet 32 are connected to the conductive sheet by soldering.

The embodiment of the present application further provides a battery pack 100, which includes a first battery module 10, a second battery module 20, and a connection structure 30, wherein the first battery module 10 and the second battery module 20 are electrically connected through the connection structure 30.

In some embodiments, the first battery module 10 includes a first frame 11, a plurality of first electric core groups 12 and a plurality of first electric conductive members 13, the plurality of first electric core groups 12 are installed in the first frame 11, and the plurality of first electric core groups 12 are connected in series by the plurality of first electric conductive members 13. For example, the first battery module 10 includes a first frame 11, seven first electric core groups 12 and a plurality of first conductive members 13, the seven first electric core groups 12 are arranged inside the first frame 11 according to positive and negative polarities, the plurality of first conductive members 13 connect the seven first electric core groups 12 in series according to a manner that positive poles are connected with negative poles, and after the seven first electric core groups 12 are connected in series, a positive pole interface and a negative pole interface, namely, the positive pole and the negative pole of the first battery module 10, are reserved in the first electric core group and the last electric core group in the seven first electric core groups 12.

The second battery module 20 includes a second frame 21, a plurality of second electric core groups 22 and a plurality of second conductive members 23, the plurality of second electric core groups 22 are installed in the second frame 21, and the plurality of second electric core groups 22 are connected in series through the plurality of second conductive members 23. For example, the second battery module 20 includes a second frame 21, seven second electric core groups 22 and a plurality of second conductive members 23, the seven second electric core groups 22 are arranged in the second frame 21 according to positive and negative polarities, the plurality of second conductive members 23 connect the seven second electric core groups 22 in series in a manner that the positive electrode is connected with the negative electrode, and after the connection in series, a positive electrode interface and a negative electrode interface, i.e. the positive electrode and the negative electrode of the second battery module 20, are reserved in the first electric core group and the last electric core group in the seven second electric core groups 22.

The connection structure 30 connects the first battery module 10 and the second battery module 20 in series to form the battery pack 100 by connecting the positive electrode of the first battery module 10 and the negative electrode of the second battery module 20, or by connecting the negative electrode of the first battery module 10 and the positive electrode of the second battery module 20.

In other embodiments, the connection structure 30 may also simultaneously connect the positive electrodes or the negative electrodes of the first battery module 10 and the second battery module 20, so that the first battery module 10 and the second battery module 20 are connected in parallel to form the battery pack 100.

Alternatively, the first substrate 33 is mounted to the outer sidewall of the first frame 11 and the outer sidewall of the second frame 21. Illustratively, the first and second battery modules 10 and 20 are stacked, and the first substrate 33 is partially mounted on an outer sidewall of the first frame 11 and partially mounted on an outer sidewall of the second frame 21. This design may allow the battery pack 100 to be compact and small in size.

As shown in fig. 3 to 5, in some embodiments, the outer side wall of the first frame 11 and the outer side wall of the second frame 21 are provided with a first fastening member 111, the first substrate 33 is provided with a first fastening hole 333, and the first fastening member 111 is inserted into the first fastening hole 333, so that the first substrate 33 is fastened to the outer side wall of the first frame 11 and the outer side wall of the second frame 21. With this design, through setting up first base plate 33 and first buckle spare joint, the dismouting of first base plate 33 of being convenient for.

Optionally, the first fastener 111 includes two elastic arms 1111 disposed at an interval, and one side of each of the two elastic arms 1111, which is far away from one end of the first frame 11 or the second frame 21 and is opposite to the other end, is provided with a protrusion 1112. When the first substrate 33 is mounted, the two protrusions 1112 are inserted through the first locking hole 333 from one side of the first substrate 33 and locked to the other side of the first substrate 33, and when the first substrate 33 is dismounted, the two protrusions 1112 are pressed toward each other and withdrawn from the first locking hole 333 to dismount the first substrate 33. The first latch 111 of this design is very convenient for the first substrate 33 to be detached.

As shown in fig. 3, 4 and 6, in some embodiments, the positioning pillars 112 are disposed on the outer sidewalls of the first frame 11 and the second frame 21, the first substrate 33 is disposed with positioning holes 334, and the positioning pillars 112 are disposed through the positioning holes 334. The positioning posts 112 are used for positioning the first substrate 33, so that the first substrate 33 can be better fixed on the outer side wall of the first frame 11 and the outer side wall of the second frame 21.

Optionally, the first substrate 33 is substantially rectangular, the number of the first fastening holes 333 is two, the number of the first fastening members 111 is the same as the number of the first fastening holes 333, the number of the positioning holes 334 is two, the number of the positioning pillars 112 is the same as the number of the positioning holes 334, the two first fastening holes 333 are respectively located at two corners of one diagonal of the first substrate 33, and the two positioning holes 334 are respectively located at two corners of the other diagonal of the first substrate 33.

Of course, the number of the first hooking holes 333 is not limited to two, and may be three, four or more, and correspondingly, the number of the first hooking portions matches the number of the first hooking holes 333. In some embodiments, the positioning holes 334 may not be disposed on the first substrate 33.

As shown in fig. 2, in some embodiments, the handles 113 are disposed on two opposite sides of the first frame 11 and the second frame 21, and the first substrate 33 is disposed between the handles 113 on the same side of the first frame 11 and the second frame 21, so that the first substrate 33 can be conveniently carried and protected by the handles 113, and the problem of loose connection of the first substrate 33 due to external force is avoided.

As shown in fig. 7, in some embodiments, the positive electrode or the negative electrode of the first battery module 10 is provided with a first conductive member 13, and the first connecting piece 31 is pressed against the first conductive member 13, optionally, the first conductive member 13 is a nickel sheet, and the first connecting piece 31 is a copper sheet, and by pressing the copper sheet against the nickel sheet, the overcurrent capacity can be increased, and the safety performance of the battery pack 100 can be improved.

In some embodiments, the positive electrode or the negative electrode of the second battery module 20 is provided with a second conductive member 23, and the second connecting piece 32 is pressed on the second conductive member 23.

As shown in fig. 1, 2, 8 and 9, in some embodiments, the battery pack 100 further includes a voltage acquisition board 40 and a control circuit board 50, and the control circuit board 50 may be a BMS (battery management system) board. The voltage collecting plate 40 includes a second substrate 46, a first connection terminal 43, and a wire (not shown). The conductive lines may be copper-mode conductive lines disposed on the second substrate 46 for carrying current signals to effect physical connection of the circuit. The first conductive member 23 includes a voltage collecting terminal 131 protruding outward of the first frame 11. The second substrate 46 is fixed on the outer side wall of the first frame 11 and the outer side wall of the second frame 21, the second substrate 46 is provided with a collecting hole matched with the voltage collecting end 131, and the welding points are arranged on the second substrate 46 around the collecting hole, so that the voltage collecting end 131 can be directly welded and connected with the welding points around the collecting hole. The collecting hole may be a through slot 41 or a through hole 42. In other embodiments, the positions and the number of the collecting holes can be matched with the voltage collecting terminals 131 on the second conductive member 23. Be equipped with the joining region that is used for installing binding post on the second base plate 46, on the second base plate 46 was located to the wire, wire one end was connected with the welding point electricity, and the other end extends to in the joining region for second base plate 46 and wire can replace traditional insulated wire welding mode to carry out battery voltage and gather, and the installation effectiveness is higher, and connection reliability is higher.

The first connection terminal 43 is fixed in a connection region of the second substrate 46, and one end of a wire is electrically connected to the pad and the other end is electrically connected to the first connection terminal 43. In some embodiments, the first and second conductive members 13 and 23 include voltage collecting terminals 131, the voltage collecting terminals 131 are inserted into the through slots 41 or the through holes 42 and electrically connected to the voltage collecting plate 40, and the voltage collecting plate 40 is used for collecting the voltage of the electric core pack 12. The control circuit board 50 is stacked with the voltage collecting board 40 and electrically connected to the voltage collecting board 40. Further, the control circuit board 50 is provided with a second connection terminal 51, and the first connection terminal 43 and the second connection terminal 51 are connected directly or through a flat cable. For example, the first connection terminal 43 and the second connection terminal 51 may be pin connectors that are matched with each other, and the first connection terminal 43 and the second connection terminal 51 are respectively provided at sides of the control circuit board 50 and the voltage collecting board 40 that are opposite to each other, so that the first connection terminal 43 and the second connection terminal 51 can be directly connected by plugging.

In other embodiments, the first connection terminal 43 may be a first flat cable connector 43, the second connection terminal 51 may be a second flat cable connector 51, and the second flat cable connector 51 is connected to the first flat cable connector 43 by a flat cable. That is, the first bus bar connector 43 is disposed on one side of the voltage collecting board 40 close to the control circuit board 50, the second connecting terminal 51 is disposed on one side of the control circuit board 50 far away from the voltage collecting board 40, the voltage collecting board 40 and the control circuit board 50 are connected through the first bus bar connector 43, the second bus bar connector 51 and the bus bar which can be bent, the control circuit board 50 can be closer to the voltage collecting board 40, and the whole structure of the battery pack 100 is more compact. Meanwhile, compared with the existing mode of wire connection, in the embodiment, the voltage acquisition is carried out by connecting the voltage acquisition board 40 and the voltage acquisition end 131, so that a complex wire welding ring is avoided, the connection difficulty is reduced, the production efficiency is improved, and the connection reliability is improved.

In some embodiments, the outer side wall of the first frame 11 and the outer side wall of the second frame 21 are provided with second fasteners 114, the voltage collecting plate 40 is provided with second fastening holes 44, and the second fasteners 114 are inserted into the second fastening holes 44, so that the voltage collecting plate 40 is fastened to the outer side wall of the first frame 11 and the outer side wall of the second frame 21. Through setting up voltage acquisition board 40 and pass through the lateral wall of second buckle 114 joint in the lateral wall of first frame 11 and second frame 21, the dismouting of the voltage acquisition board 40 of being convenient for, voltage acquisition board 40 can also play the effect of connecting first battery module 10 and second battery module 20. The structure of the second locking element 114 can refer to the first locking element 111, which is not described herein.

In some embodiments, the voltage collecting plate 40 is provided with an avoiding hole 45, and the avoiding hole 45 is used for avoiding a protruding portion of the outer side wall of the first frame 11 and/or the outer side wall of the second frame 21. Through setting up and dodging the bulge that hole 45 dodged the lateral wall of first frame 11 and/or the lateral wall of second frame 21 for voltage acquisition board 40 can paste the lateral wall of first frame 11 and the lateral wall of second frame 21, and battery package 100 overall structure is more compact.

In some embodiments, the battery pack 100 further includes a fastener (not shown), the outer side wall of the first frame 11 and the outer side wall of the second frame 21 are convexly provided with a connection post 115 and a support post 116, the control circuit board 50 is provided with a mounting hole 52, the connection post 115 passes through the voltage collecting plate 40 and is opposite to the mounting hole 52, the fastener is connected to the connection post 115 to fasten the control circuit board 50 to the connection post 115, and the support post 116 passes through the voltage collecting plate 40 and abuts against the control circuit board 50. The cooperation of the fastening member and the connection post 115 allows the control circuit board 50 to be firmly connected to the outer side wall of the first frame 11 and the outer side wall of the second frame 21, and the support post 116 can support the control circuit board 50, increasing the stability of the control circuit board 50.

In some embodiments, the control circuit board 50 is provided with a welding region 53, and the positive electrodes or the negative electrodes of the first battery module 10 and the second battery module 20 are welded and fixed to the welding region 53.

As shown in fig. 10, an embodiment of the present application further provides an energy storage device 1000, which includes a housing 102 having a receiving cavity (not shown), and the battery pack 100 described above, wherein the battery pack 100 is disposed in the receiving cavity and is fixedly connected to the housing 102.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A connection structure for connecting a first battery module and a second battery module, the connection structure comprising:

one end of the first connecting sheet is connected with the positive electrode or the negative electrode of the first battery module;

one end of the second connecting sheet is connected with the positive electrode or the negative electrode of the second battery module;

the circuit board comprises a first substrate, a second substrate and a third substrate, wherein the first substrate is provided with a first connecting hole and a second connecting hole;

the conducting plate is arranged on the first substrate;

the other end of the first connecting sheet penetrates through the first connecting hole and is electrically connected with the conducting strip, and the other end of the second connecting sheet penetrates through the second connecting hole and is electrically connected with the conducting strip.

2. The connecting structure according to claim 1, wherein the first connecting piece includes a plurality of first sub-connecting portions arranged side by side at intervals, the number of the first connecting holes is plural, the plurality of first connecting holes are arranged side by side at intervals, and the plurality of first sub-connecting portions are arranged through the plurality of first connecting holes in a one-to-one correspondence; and/or the first and/or second light-emitting diodes are arranged in the light-emitting diode,

the second connecting piece comprises a plurality of second sub-connecting portions arranged side by side at intervals, the number of the second connecting holes is multiple, the second connecting holes are arranged side by side at intervals, and the second sub-connecting portions are arranged in the second connecting holes in a penetrating mode in a one-to-one correspondence mode.

3. The connection structure according to claim 1, wherein the first substrate includes two base materials arranged in a stacked manner, and the conductive sheet is sandwiched between the two base materials; or the like, or, alternatively,

the conductive sheet is a copper foil coated or adhered on the first substrate.

4. The connection structure of claim 1, wherein one end of the conductive sheet extends into or around the first connection hole and the other end extends into or around the second connection hole.

5. The connection structure according to claim 1, wherein the first connection piece is solder-connected to the conductive sheet; and/or the first and/or second light-emitting diodes are arranged in the light-emitting diode,

the second connecting sheet is connected with the conducting sheet in a welding mode.

6. A battery pack, comprising:

a first battery module;

a second battery module;

the connecting structure of any one of claims 1 to 5;

the connecting structure is respectively connected with the first battery module and the second battery module so as to electrically connect the first battery module and the second battery module.

7. The battery pack according to claim 6, wherein a first fastening member is disposed on an outer side wall of the first battery module, a first fastening hole is disposed on the first base plate, and the first fastening member is inserted into the first fastening hole, so that the first base plate is fixed to the first battery module.

8. The battery pack of claim 6, wherein the battery pack comprises a voltage acquisition board; the first battery module comprises a first frame, a first electric core group arranged in the first frame and a first conductive piece electrically connected with the first electric core group, and the first conductive piece comprises a voltage acquisition end extending out of the first frame;

the voltage acquisition board includes:

the second substrate is fixed on the first frame and is provided with a connecting area for mounting a wiring terminal; the second substrate is also provided with a collecting hole matched with the voltage collecting end, and welding points are arranged on the second substrate around the collecting hole;

and the wire is arranged on the second substrate, one end of the wire is electrically connected with the welding point, and the other end of the wire extends into the connecting area.

9. The battery pack according to claim 8, wherein the voltage collecting plate includes a first connection terminal fixed in the connection region, and the other end of the wire is electrically connected to the first connection terminal;

the battery pack further comprises a control circuit board, wherein a second connecting terminal is arranged on the control circuit board, and the first connecting terminal is directly connected with the second connecting terminal or is connected with the second connecting terminal through a flat cable.

10. An energy storage device, comprising:

a housing having a receiving cavity;

the battery pack according to any one of claims 6 to 9;

the battery pack is arranged in the accommodating cavity and is fixedly connected with the shell.

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