CN217426936U

CN217426936U - Fixed subassembly and energy storage equipment

Info

Publication number: CN217426936U
Application number: CN202221249674.1U
Authority: CN
Inventors: 裴义林; 徐同
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-09-13
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a fixing component and energy storage equipment, wherein the fixing component comprises a first mounting plate, a second mounting plate and a first connecting piece; the first mounting plate is used for being mounted on the cabinet body; the second mounting plate is rotatably connected to the first mounting plate, the second mounting plate is provided with a first elongated hole, and the first elongated hole extends along a direction parallel to the rotating direction of the second mounting plate; the first connecting piece is movably arranged in the first long hole in a penetrating mode and used for being connected with the fuse wire. The utility model discloses technical scheme controls when realizing the fuse installation adjustable and direction of rotation is adjustable to guaranteed that the fuse can not receive other deviation factors to influence the installation problem when the installation, avoided the problem that the fuse installation is not last.

Description

Fixed subassembly and energy storage equipment

Technical Field

The utility model relates to an energy storage equipment technical field, in particular to fixed subassembly and energy storage equipment.

Background

With the development of the energy storage industry, lithium batteries gradually become mainstream products of energy storage due to the advantages of high energy ratio, long service life, light weight, environmental protection, no water consumption in production and the like. Meanwhile, the requirement on the safety of lithium batteries for energy storage is higher and higher, and many customers require that a fuse wire is added in the middle of each cluster for safety protection.

The inter-cluster fuse wire is in the energy storage system, needs to be fixed in the cabinet body stand column through the fixing assembly, and then connects the lithium battery cluster, because the current fuse wire is installed in the unadjustable state behind the fixing assembly, and the fuse wire self uses the cable diameter thick difficult buckling, can not carry out the surplus and adjust, when there are phenomenons such as stand processing deviation, battery package installation deviation, leads to appearing the fuse wire and installs not go up the problem. If the cable used by the fuse is lengthened and can be bent to be aligned and mounted, problems such as cable waste and poor appearance after mounting occur.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective provides a fixed subassembly, aims at improving the convenience and the reliability of fuse installation.

In order to achieve the above object, the utility model provides a fixed subassembly, fixed subassembly includes:

the first mounting plate is used for being mounted on the cabinet body;

the second mounting plate is rotatably connected to the first mounting plate, a first elongated hole is formed in the second mounting plate, and the first elongated hole extends in a direction parallel to the rotating direction of the second mounting plate; and

the first connecting piece can movably penetrate through the first long hole and is used for being connected with the fuse wire.

Optionally, the first elongated hole and the first connecting piece are a plurality of in quantity, and are a plurality of first elongated hole interval set up in the second mounting panel, one first connecting piece is corresponding to wear to locate one first elongated hole.

Optionally, the fixing assembly further includes a third mounting plate, the first connecting member is disposed through the first elongated hole and connected to the third mounting plate, and the fuse is mounted on the third mounting plate.

Optionally, the third mounting panel is including the main part board that is connected and locating the fixed plate of the relative both sides of main part board, the main part board with the fixed plate encloses the mounting groove that closes and form the installation fuse, the main part board orientation one side of second mounting panel is equipped with the installation turn-ups, first connecting piece connect in the installation turn-ups.

Optionally, the main body plate is provided with heat dissipation holes, and the heat dissipation holes extend in the vertical direction.

Optionally, the fixing assembly further includes a second connecting member, and the second connecting member penetrates through the main body plate and the fuse to fix the fuse.

Optionally, the second connector is a blind rivet nut.

Optionally, the fixed component further comprises a hinge, one side of the hinge is connected with the first mounting plate, the other side of the hinge is connected with the second mounting plate, and the second mounting plate drives the hinge to rotate relative to the first mounting plate.

Optionally, a second elongated hole is formed in the first mounting plate, and the second elongated hole and the second mounting plate extend in a direction parallel to the rotation direction.

The utility model also provides an energy storage equipment, include as above fixed subassembly, the cabinet body, battery cluster and fuse, the battery cluster is located the cabinet is internal, first mounting panel install in the cabinet body, the second mounting panel with first mounting panel rotates to be connected, first connecting piece is worn to locate first elongated hole is connected the fuse, the fuse electricity is connected the battery cluster.

The utility model discloses technical scheme rotates through first mounting panel and second mounting panel to be connected, is provided with first elongated hole along the direction parallel rather than the direction of rotation on the second mounting panel, but through first connecting piece mobile wear to locate first elongated hole and connect in the fuse for the fuse can follow the direction horizontal migration that first elongated hole is parallel at second mounting panel direction of rotation. Therefore, the left and right adjustability and the rotation direction adjustability during fuse installation are achieved, the installation problem of the fuse cannot be influenced by other deviation factors during installation is guaranteed, and the problem that the fuse cannot be installed is solved.

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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of a fixing assembly of the present invention;

FIG. 2 is an exploded view of the securing assembly shown in FIG. 1;

FIG. 3 is a schematic view of the fixing assembly shown in FIG. 1 from another perspective;

FIG. 4 is a schematic structural view of the fixing assembly and the fuse according to the present invention after being installed;

FIG. 5 is an exploded view of the fixing assembly and fuse shown in FIG. 4;

fig. 6 is a schematic structural diagram of an embodiment of the energy storage device of the present invention;

fig. 7 is a schematic structural diagram of the energy storage device shown in fig. 6 with the fuse plug pulled out.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Fixing assembly	10	First mounting plate
11	Second elongated hole	20	Second mounting plate
				21	First elongated hole	30	First connecting piece
40	Third mounting plate	41	Main board
				411	Heat dissipation hole	413	Mounting flange
43	Fixing plate	45	Mounting groove
				50	Second connecting piece	60	Hinge assembly
2	Cabinet body	3	Battery cluster
				4	Fuse wire

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a fixed subassembly 1.

In the embodiment of the present invention, as shown in fig. 1 to 5, the fixing assembly 1 includes a first mounting plate 10, a second mounting plate 20, and a first connecting member 30; the first mounting plate 10 is used for being mounted on the cabinet body 2; the second mounting plate 20 is rotatably connected to the first mounting plate 10, the second mounting plate 20 is provided with a first elongated hole 21, and the first elongated hole 21 extends in a direction parallel to the rotating direction of the second mounting plate 20; the first connecting member 30 is movably disposed through the first elongated hole 21 and is used for connecting the fuse 4.

The first mounting plate 10 is used for being installed on the cabinet 2, that is, the first mounting plate 10 can be fixed on the cabinet 2, and when the fuse 4 is installed on the fixing assembly 1, the first mounting plate 10 can fix the fuse 4 to the corresponding position of the cabinet 2, and fix the installation height and the installation position of the fuse 4. The connected mode of first mounting panel 10 and the cabinet body 2 can be threaded connection, bonding, welding etc., and the connected mode of first mounting panel 10 and the cabinet body 2 can be fixed connection or swing joint, fixed connection's mode is first mounting panel 10 and installs back to the cabinet body 2 on, the two is the state that can not relative movement, swing joint's mode is first mounting panel 10 and cabinet body 2 installation back, can remove the relative position of first mounting panel 10 and the cabinet body 2, and then change the holistic relative position of fixed subassembly 1 and the cabinet body 2, and then fuse 4 can adjust according to the removal of fixed subassembly 1 after installing in the cabinet body 2.

The second mounting plate 20 is rotatably connected with the first mounting plate 10, the rotational connection mode can be a rotating shaft connection, a hinge 60 connection and the like, the first mounting plate 10 is mounted on the cabinet body 2, one side of the second mounting plate 20 is connected with one side of the first mounting plate 10, the second mounting plate 20 rotates along one side of the first mounting plate 10, and the fuse 4 is connected with the second mounting plate 20, so that the fuse 4 rotates, and the direction of the fuse 4 can be changed; the fuse 4 can be inserted into or separated from the battery cluster 3 through rotation, so that the fuse 4 and the fixing component 1 can be conveniently installed, and the installation efficiency is improved; when the fuse wire 4 is far away from the battery cluster 3 through rotation, the front maintenance can be carried out on the fuse wire 4, and the maintenance convenience and efficiency of the fuse wire 4 are improved.

The second mounting plate 20 is provided with a first elongated hole 21, the first elongated hole 21 extends in a direction parallel to the rotation direction of the second mounting plate 20, and the first connecting member 30 is movably disposed through the first elongated hole 21, so that the first connecting member 30 can reciprocate in the first elongated hole 21 in the horizontal direction, and since one end of the first connecting member 30 is connected to the fuse 4, the fuse 4 can reciprocate in the first elongated hole 21 in the horizontal direction along with the first connecting member 30, and synchronously move along with the second mounting plate 20. When the first mounting plate 10 is mounted on the side of the cabinet body 2, the second mounting plate 20 rotates away from the first mounting plate 10 and the fuse 4 is close to the battery cluster 3, the extending direction of the second mounting plate 20 is parallel to the mounting surface of the battery cluster 3, so that the extending direction of the first elongated hole 21 is parallel to the mounting surface of the battery cluster 3, and when the first connecting member 30 and the fuse 4 are located in the first elongated hole 21, the fuse 4 moves along the mounting surface of the battery cluster 3 in parallel, so that the plug of the fuse 4 also moves along the mounting surface of the battery cluster 3, and therefore, the horizontal position of the fuse 4 can be independently adjusted under the condition that the first mounting plate 10 and the second mounting plate 20 are fixed, the plug can be connected with the socket of the battery cluster 3, and the problem that the fuse 4 cannot be mounted is avoided. Moreover, the operation of lengthening and producing the cables of the fuses 4 is not needed, so that the lengths of the cables of the fuses 4 are kept consistent, the installation in place is ensured, and the attractiveness and the working efficiency are improved.

The arrangement of the first elongated hole 21 limits the moving tracks of the first connecting piece 30 and the fuse 4 on the one hand, and ensures the moving direction of the fuse 4, and limits the moving distance of the fuse 4 and the first connecting piece 30 on the other hand, so as to avoid the moving distance from being too long or too short, and change the moving distance of the fuse 4 according to the extension length of the first elongated hole 21, further change the moving range of the fuse 4, and ensure the connection effect of the fuse 4 and the battery cluster 3.

The utility model discloses technical scheme rotates through first mounting panel 10 and second mounting panel 20 and connects, is provided with first elongated hole 21 along the direction parallel rather than the direction of rotation on the second mounting panel 20, but movably wears to locate first elongated hole 21 and connects in fuse 4 through first connecting piece 30 for fuse 4 can follow first elongated hole 21 and rotate the parallel direction horizontal migration of direction at second mounting panel 20. And then realize that about adjustable and direction of rotation are adjustable when fuse 4 installs to guaranteed that fuse 4 can not receive other deviation factors to influence the installation problem when the installation, avoided the problem that fuse 4 can not install.

In an embodiment of the present invention, as shown in fig. 1 to fig. 5, the number of the first elongated holes 21 and the number of the first connecting members 30 are plural, the plural first elongated holes 21 are disposed at the second mounting plate 20 at intervals, and a first connecting member 30 correspondingly penetrates through a first elongated hole 21.

The second mounting plate 20 is provided with a plurality of first elongated holes 21, a plurality of first elongated holes 21 are arranged at intervals, and a plurality of first connecting members 30 are also arranged, one first connecting member 30 correspondingly penetrates through one first elongated hole 21 and is connected to different positions of the fuse 4. When the first elongated holes 21 are arranged at intervals, the first elongated holes extend in the direction parallel to the rotating direction of the second mounting plate 20, the horizontal positions of the fuses 4 can be moved at different heights, because the number of the plug connectors of the fuses 4 can be a plurality of plug connectors arranged at intervals, and the heights of the plug connectors are different, therefore, the first elongated holes 21 can be arranged, the plug connectors at different heights can be moved, the effect that each plug connector and each socket are aligned to be plugged is achieved, the position of one first connecting piece 30 in each first elongated hole 21 can be independently adjusted, the horizontal positions of the fuses 4 at different heights can be independently adjusted, and the effect of accurately adjusting the positions of the fuses 4 is achieved.

In an embodiment of the present invention, as shown in fig. 1 to 5, the fixing assembly 1 further includes a third mounting plate 40, the first connecting member 30 is disposed through the first elongated hole 21 and connected to the third mounting plate 40, and the fuse 4 is mounted on the third mounting plate 40.

The third mounting plate 40 is connected to the first connector 30, the fuse 4 is mounted on the third mounting plate 40, and the fuse 4 and the third mounting plate 40 can be connected by a screw connection, a rivet connection, a snap connection, etc. It can be understood that the third mounting plate 40 is used for supporting and protecting the fuse 4, and the first connecting element 30 is inserted into the first elongated hole 21 and connected to the third mounting plate 40, so that the position of the fuse 4 can be changed by moving the first connecting element 30 to the position of the first elongated hole 21 and then changing the positions of the third mounting plate 40 and the fuse 4.

Further, the third mounting plate 40 can be connected with a plurality of first connecting pieces 30, and because a plurality of first connecting pieces 30 are located at different heights, and then can move at different heights and then the position of the horizontal direction, and then adjust the horizontal positions of the third mounting plate 40 at different heights independently, realize adjusting the horizontal positions of the fuse 4 at different heights independently.

In an embodiment of the present invention, as shown in fig. 1 to 5, the third mounting plate 40 includes a main body plate 41 and a fixing plate 43 disposed on two opposite sides of the main body plate 41, the main body plate 41 and the fixing plate 43 enclose a mounting groove 45 for mounting the fuse 4, the main body plate 41 is provided with a mounting flange 413 facing one side of the second mounting plate 20, and the first connecting member 30 is connected to the mounting flange 413.

The fixing plate 43 and the main body plate 41 are enclosed to form a mounting groove 45, the fuse 4 is mounted in the mounting groove 45, the mounting groove 45 has a function of accommodating the fuse 4, the main body plate 41 is arranged along the vertical direction, and the main body plate 41 is used for connecting the mounting flange 413 and the fixing plate 43 and has the effects of main body support and connection; the mounting flange 413 is arranged on one side of the main body plate 41 facing the second mounting plate 20 and is used for connecting the third mounting plate 40 with the first connecting piece 30, namely the second mounting plate 20; the fixing plate 43 is disposed along the horizontal direction, connected to the edge of the main body plate 41, and disposed at an angle with the main body plate 41 and enclosing to form a mounting groove 45, and the fixing plate 43 has fixing and supporting functions for the fuse 4. The main body plate 41 and the mounting flange 413 change the position of the entire third mounting portion in accordance with the position of the first link 30, thereby achieving the effect of changing the position of the fuse 4.

In an embodiment of the present invention, as shown in fig. 1 to fig. 5, the main body plate 41 has heat dissipation holes 411, and the heat dissipation holes 411 extend along the vertical direction.

The main body plate 41 is provided with heat dissipation holes 411, and in the present embodiment, the heat dissipation holes 411 extend in a vertical direction. It can be understood that, when the number of the heat dissipation holes 411 is one, most of the area of the main body plate 41 is covered by the heat dissipation holes 411, so that the heat generated by the fuse 4 is conducted to the external environment through the heat dissipation holes 411, the blocking area of the fuse 4 by the third mounting plate 40 is reduced, and the heat dissipation effect is improved; when the number of the heat dissipation holes 411 is multiple, the heat dissipation holes 411 are uniformly arranged at intervals, so that the blocking area of the third mounting plate 40 for the fuse 4 can be reduced, and the heat dissipation effect is improved.

In an embodiment of the present invention, as shown in fig. 1 to 5, the fixing assembly 1 further includes a second connecting member 50 (not shown), and the second connecting member 50 is disposed through the main body plate 41 and the fuse 4 for fixing the fuse 4.

The second connecting member 50 penetrates through the main body plate 41 and the fuse 4, through holes are formed in the main body plate 41 and the fuse 4, the fixing plate 43 and the fuse 4 are connected through the second connecting member 50, connection tightness of the fuse 4 and the third mounting plate 40 is guaranteed, the fuse 4 and the third mounting plate 40 move synchronously, and the fuse 4 is supported and protected.

In an embodiment of the present invention, the second connecting member 50 is a rivet nut.

The rivet nut has the advantages of obvious advantages, firm riveting, high efficiency and convenient use. The welding nut is developed for overcoming the defects that a welding nut of a metal sheet and a thin pipe is easy to melt, an internal thread is easy to slip, and the like, and does not need to tap the internal thread or weld the nut. In the embodiment, the rivet nut is used for connecting the fuse 4 and the third mounting plate 40, so that the connecting effect of the fuse 4 and the third mounting plate 40 is improved, and the connecting tightness of the fuse 4 and the third mounting plate 40 is ensured.

In an embodiment of the present invention, as shown in fig. 1 to 5, the fixing assembly 1 further includes a hinge 60, one side of the hinge 60 is connected to the first mounting plate 10, the other side is connected to the second mounting plate 20, and the second mounting plate 20 drives the hinge 60 to rotate relative to the first mounting plate 10.

One side of the hinge 60 is connected to the first mounting plate 10, and the other side is connected to the second mounting plate 20, so that the first mounting plate 10 and the second mounting plate 20 can be opened and closed in a rotating manner, and the second mounting plate 20 drives the hinge 60 to rotate relative to the first mounting plate 10. The hinge 60 can ensure the butt joint position of the first mounting plate 10 and the second mounting plate 20 on the one hand, and ensure the accurate butt joint of the first mounting plate 10 and the second mounting plate 20 on the other hand, and the rotating position of the first mounting plate 10 and the second mounting plate 20 is fixed on the other hand, so that the second mounting plate 20 can be rotated to be close to or far away from the first mounting plate 10 quickly, the fuse 4 can be rotated conveniently, and the maintenance of the fuse 4 is further facilitated.

Further, the hinge 60 can be made of stainless steel, and the hinge 60 is made of stainless steel and has the characteristics of rust resistance, wear resistance and convenience in disassembly. And the hinge 60 has the advantages of strong adaptability, strong durability and high convenience, and the service life of the hinge 60 is prolonged.

In an embodiment of the present invention, as shown in fig. 1 to fig. 5, the first mounting plate 10 is provided with a second elongated hole 11, and the second elongated hole 11 is disposed to extend in a direction parallel to a rotation direction of the second mounting plate 20.

The first mounting plate 10 is provided with a second elongated hole 11, the second elongated hole 11 extends in the direction parallel to the rotation direction of the second mounting plate 20, the fixing assembly 1 further comprises a third connecting piece, and the third connecting piece can movably penetrate through the second elongated hole 11 and is in threaded connection with the cabinet body 2. And then the third connecting piece and the cabinet body 2 are in a fixed connection state, the first mounting plate 10 can move relative to the third connecting piece through the second elongated hole 11, and then the positions of the first mounting plate 10 and the cabinet body 2 are changed. Because of first mounting panel 10 installation to the side of the cabinet body 2 again for when first mounting panel 10 removed, fixed subassembly 1 is whole to stretch into or stretch out along the cabinet body 2 opening, and then makes fuse 4 be close to or keep away from battery cluster 3, makes its bayonet joint can connect the socket of battery cluster 3, has avoided the problem that fuse 4 can not install.

The utility model discloses still provide an energy storage equipment, as shown in fig. 6, fig. 7, this energy storage equipment includes the cabinet body 2, electromagnetism cluster, fuse 4 and fixed subassembly 1, and in the cabinet body 2 was located to battery cluster 3, first mounting panel 10 was installed in the cabinet body 2, and second mounting panel 20 rotated with first mounting panel 10 and is connected, and first connecting piece 30 wears to locate first elongated hole 21 and connects fuse 4, and battery cluster 3 is connected to 4 electricity connections of fuse. The specific structure of the fixing assembly 1 refers to the above embodiments, and since the energy storage device adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A securing assembly for securing a fuse, the securing assembly comprising:

the first mounting plate (10), the first mounting plate (10) is used for being mounted on the cabinet body (2);

the second mounting plate (20), the second mounting plate (20) is rotatably connected to the first mounting plate (10), the second mounting plate (20) is provided with a first elongated hole (21), and the first elongated hole (21) extends in a direction parallel to the rotating direction of the second mounting plate; and

the first connecting piece (30) is movably arranged through the first long hole (21) and used for connecting the fuse wire (4).

2. The fixing assembly according to claim 1, wherein the number of the first elongated holes (21) and the first connecting members (30) is plural, a plurality of the first elongated holes (21) are arranged at intervals on the second mounting plate (20), and one of the first connecting members (30) is correspondingly arranged through one of the first elongated holes (21).

3. A fixing assembly according to claim 2, characterized in that it further comprises a third mounting plate (40), said first connector (30) being arranged through said first elongated hole (21) and being connected to said third mounting plate (40), said fuse (4) being mounted to said third mounting plate (40).

4. A fixing assembly according to claim 3, wherein the third mounting plate (40) comprises a main body plate (41) and a fixing plate (43) arranged at two opposite sides of the main body plate, the main body plate (41) and the fixing plate (43) enclose a mounting groove (45) for mounting the fuse, a mounting flange (413) is arranged at one side of the main body plate facing the second mounting plate, and the first connecting member (30) is connected to the mounting flange (413).

5. The fixing assembly according to claim 4, wherein the main body plate (41) is provided with a heat dissipating hole (411), and the heat dissipating hole (411) extends in a vertical direction.

6. The fixing assembly according to claim 4, characterized in that it further comprises a second connecting member (50), said second connecting member (50) being arranged through said body plate (41) and said fuse (4) for fixing said fuse (4).

7. A securing arrangement according to claim 6, characterised in that the second connecting member (50) is a blind rivet nut.

8. A securing assembly according to any of claims 1 to 7, characterised in that the securing assembly further comprises a hinge (60), the hinge (60) being connected on one side to the first mounting plate (10) and on the other side to the second mounting plate (20), the second mounting plate (20) causing the hinge (60) to rotate relative to the first mounting plate (10).

9. A securing arrangement according to any one of claims 1 to 7, characterised in that the first mounting plate (10) is provided with a second elongate aperture (11), the second elongate aperture (11) extending in a direction parallel to the direction of rotation of the second mounting plate.

10. An energy storage device, comprising the fixing assembly, the cabinet body (2), the battery cluster (3) and the fuse (4) according to any one of claims 1 to 9, wherein the battery cluster (3) is disposed in the cabinet body (2), the first mounting plate (10) is mounted on the cabinet body (2), the second mounting plate (20) is rotatably connected with the first mounting plate (10), the first connecting member (30) is disposed through the first elongated hole (21) and connected with the fuse (4), and the fuse (4) is electrically connected with the battery cluster (3).