CN117099242A

CN117099242A - Energy storage system and electric equipment

Info

Publication number: CN117099242A
Application number: CN202180096139.9A
Authority: CN
Inventors: 周锦兵; 薛志翔
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2023-11-21
Also published as: WO2022198609A1

Abstract

An energy storage system includes a plurality of battery cells and a mounting plate. The mounting plate is provided with a guide rail, and the battery unit is detachably arranged on the guide rail along the first direction. The battery unit comprises a shell and a battery cell assembly accommodated in the shell, wherein a first connecting piece and a second connecting piece are respectively arranged on two opposite sides of the shell along a first direction, and the first connecting piece and the second connecting piece are respectively electrically connected with a positive electrode and a negative electrode of the battery cell assembly. The surface of first connecting piece is equipped with first setting element, and the surface of second connecting piece is equipped with the second setting element, along the first direction, between the adjacent battery unit, first setting element is configured to with second setting element mating connection, guarantees the accurate positioning of battery unit when simplifying battery unit's connection structure, and utilizes the guide rail to lead the mounted position of battery unit fast to realize battery unit's quick installation and electric connection. The application further provides electric equipment with the energy storage system.

Description

Energy storage system and electric equipment

Technical Field

The application relates to the field of battery structures, in particular to an energy storage system and electric equipment with the energy storage system.

Background

In large-scale energy storage rack, often constitute by a plurality of battery units, current technical scheme is that single battery unit passes through mechanical bolt location installation, and battery unit's location, mechanical fastening and electrical connection are often more complicated, lead to work efficiency low easily, and be inconvenient for follow-up maintenance work.

Disclosure of Invention

In view of the above, the application provides an energy storage system and electric equipment with the energy storage system, which are characterized in that the installation position of a battery unit is quickly guided by arranging a guide rail, connecting pieces are arranged at two ends of a shell of the battery unit, and corresponding positioning pieces are arranged on the connecting pieces, so that the connection structure of the battery unit is simplified, the accurate positioning of the battery unit is ensured, the quick installation and electric connection of the battery unit are realized, the assembly time is shortened, the working efficiency is effectively improved, and the follow-up maintenance work is also facilitated.

Embodiments of the present application provide an energy storage system including a battery unit and a plurality of mounting plates. The mounting plate is provided with a guide rail, and the battery unit is detachably arranged on the guide rail along a first direction. Each battery unit comprises a shell and a battery cell assembly accommodated in the shell, a first connecting piece and a second connecting piece are respectively arranged on two opposite sides of the shell along the first direction, and the first connecting piece and the second connecting piece are respectively and electrically connected with the positive electrode and the negative electrode of the battery cell assembly. The outer surface of the first connecting piece is provided with a first positioning piece, the outer surface of the second connecting piece is provided with a second positioning piece, and the first positioning piece is configured to be in matched connection with the second positioning piece along the first direction between the adjacent battery units.

In some embodiments, the first positioning member includes a first protruding portion and a first accommodating portion, the second positioning member includes a second protruding portion and a second accommodating portion, along the first direction, between adjacent battery units, the first protruding portion is connected with the second accommodating portion in a matching manner, and the first accommodating portion is connected with the second protruding portion in a matching manner, so that accurate positioning and quick assembly between the battery units are achieved, and installation efficiency is improved.

In some embodiments, the energy storage system further includes a plurality of first rollers and a plurality of second rollers along the first direction, the first rollers and the second rollers are rotatably disposed on the guide rail, a distance between two adjacent first rollers is smaller than a distance between two adjacent second rollers, the plurality of first rollers and the plurality of second rollers are used for guiding the battery unit to the guide rail, and the plurality of second rollers are also used for buffering a moving speed of the battery unit.

In some embodiments, the housing includes a side plate, the guide rail is provided with a guide groove, and the side plate is at least partially disposed in the guide groove and abuts against the first roller or the second roller.

In some embodiments, the guide rail includes a main body portion and a guiding portion, the first roller and the second roller are disposed on the main body portion, the guiding portion includes a first limiting portion and a second limiting portion, the first limiting portion is connected to the main body portion and extends along a second direction, the second limiting portion is disposed opposite to the main body portion, the second direction is perpendicular to the first direction, and the first limiting portion, the second limiting portion and the main body portion form the guiding groove.

In some embodiments, a positioning part is arranged on one side of the side plate, which is away from the battery cell assembly, the positioning part is movably arranged in the guide groove, a through hole is formed in the positioning part along the first direction, the battery unit further comprises a third positioning piece, the third positioning piece and the through hole are oppositely arranged along the first direction, the third positioning piece between the adjacent battery units is arranged in the through hole, the matched position accuracy of the front battery unit and the rear battery unit is improved, and the reliability of mechanical connection and electric connection is facilitated.

In some embodiments, the energy storage system further comprises a connecting rod disposed between adjacent battery cells, the end of the connecting rod being provided with a positioning protrusion.

In some embodiments, one end of the connecting rod is provided with a connecting hole, the opposite end of the connecting rod is provided with a positioning protrusion, and the connecting rod can be of a one-step molding structure.

In some embodiments, the connecting rod is provided with the connecting holes at two opposite ends, and the positioning protrusion is detachably arranged in one of the connecting holes.

In some embodiments, the locating projection includes a first end and a second end, the second end having a diameter less than or equal to the diameter of the through hole in the side plate, facilitating insertion of the second end into the through hole in the side plate during installation.

In some embodiments, the mounting plate is provided with a bump, the bump abuts against one end of the guide rail, the bump is further provided with a hole, and the second end of the positioning piece is accommodated in the hole, so that positioning and mounting of the auxiliary battery unit on the rail are facilitated.

In some embodiments, a plurality of heat dissipation fins are further disposed on a side of the side plate facing away from the battery cell assembly, so as to increase a heat dissipation area of the battery cell.

In some embodiments, the battery cell further includes a first conductive member electrically connecting the cell assembly with the first connector and a second conductive member electrically connecting the cell assembly with the second connector.

In some embodiments, the number of the battery units is two, and the two battery units are sequentially connected along the first direction, wherein the first positioning piece of one battery unit is inserted into the second positioning piece of the other battery unit.

In some embodiments, the energy storage system further comprises a fixing piece, the positioning plate is detachably mounted on the fixing piece and located on the side edge of the guide rail, the battery unit further comprises a connecting piece, the connecting piece is convexly arranged on the outer side of the shell, the connecting piece is detachably connected with the fixing piece, the mounting difficulty of the battery unit is reduced, the safety of the battery unit is improved, and the problem that the battery unit slides or vibrates is reduced.

The embodiment of the application also provides electric equipment, which comprises the energy storage system.

Above-mentioned energy storage system is through setting up the mounted position that the guide rail comes the quick direction battery unit to set up the connecting piece at battery unit's casing both ends, and set up corresponding setting element on the connecting piece, guarantee battery unit's accurate positioning when simplifying battery unit's connection structure, thereby realize battery unit's quick installation and electrical connection, reduce assembly time, effectively improved work efficiency, also be convenient for follow-up maintenance work.

Drawings

Fig. 1 is a schematic perspective view of an energy storage system in an embodiment.

Fig. 2 is a front view of a battery cell and left and right side views of the energy storage system of fig. 1 with portions of the housing side plates removed.

Fig. 3 is a schematic perspective view of a battery unit in the energy storage system shown in fig. 1.

Fig. 4 is a schematic perspective view of the battery cell shown in fig. 3 in another direction.

Fig. 5 is a partial schematic view of the battery unit of fig. 3 with a portion of the case removed.

Fig. 6 is a partial schematic view of the battery unit of fig. 4 with a portion of the case removed.

Fig. 7 is a schematic view of a partial connection structure of the energy storage system shown in fig. 1, with two battery cells removed from a side plate of the housing.

Fig. 8 is a schematic diagram of the energy storage system of fig. 1 with one battery unit removed.

Fig. 9 is a schematic view of the structure of the mounting plate in the unit system shown in fig. 8.

Fig. 10 is an end elevation view of the energy storage system of fig. 8.

Fig. 11 is an enlarged view of a portion of the energy storage system of fig. 10.

Fig. 12 is a side plate of a battery cell in the energy storage system of fig. 8.

Fig. 13 is a partial schematic view of the side plate shown in fig. 12.

Fig. 14 is a partial schematic view of the mounting plate of fig. 9 with the guide rails removed.

Fig. 15 is a schematic view of a partial structure of the battery unit and the guide rail in the energy storage system shown in fig. 8.

Fig. 16 is a schematic diagram illustrating a connection structure of two battery units in the energy storage system shown in fig. 1.

Fig. 17 is a schematic view of the connecting rod in the structure shown in fig. 16.

Fig. 18 is a schematic diagram of an energy storage system in an embodiment.

Fig. 19 is a schematic view of the energy storage system of fig. 18 after a cabinet is installed thereon.

Fig. 20 is a simplified diagram of a powered device in an embodiment.

Description of main reference numerals:

energy storage system 100, 100'

Electric equipment 200

Battery cell 10

Housing 11

Cover plate 111

Side plate 112

Positioning portion 1121

Through hole 1122

Radiating fin 1123

Lightening holes 1124

First end cap 113

Recess 1131

Second end cap 114

Cell assembly 12

First connector 13

First positioning member 131

First projection 1311

First receiving portion 1312

Second connector 14

Second positioning member 141

Second protruding portion 1411

Second receiving portion 1412

First conductive member 15

Second conductive member 16

Third positioning piece 17

First portion 171

Second portion 172

Locating surface 173

Connecting piece 18

Mounting plate 20

Bump 21

Hole 211

Guide rail 30

Body portion 31

Opening 311

Receiving groove 312

Guide portion 32

First limiting portion 321

Second limit part 322

Guide groove 323

Mounting portion 33

First roller 41

Second roller 42

Connecting rod 50

Connection hole 51

Positioning boss 52

First end 521

Second end 522

Fastener 60

Cabinet 70

Cable 101

First direction A

Second direction B

Third direction C

The specific embodiment is as follows:

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

The embodiment of the application provides an energy storage system, which comprises a plurality of battery units and a mounting plate. The mounting plate is provided with a guide rail, and the battery unit is detachably arranged on the guide rail along a first direction. The battery unit comprises a shell and a battery cell assembly accommodated in the shell, a first connecting piece and a second connecting piece are respectively arranged on two opposite sides of the shell along the first direction, and the first connecting piece and the second connecting piece are respectively and electrically connected with the positive electrode and the negative electrode of the battery cell assembly. The outer surface of the first connecting piece is provided with a first positioning piece, the outer surface of the second connecting piece is provided with a second positioning piece, and the first positioning piece is configured to be in matched connection with the second positioning piece along the first direction between the adjacent battery units.

Some embodiments of the application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Referring to fig. 1 and 2, in one embodiment, an energy storage system 100 includes a plurality of battery cells 10 and a mounting plate 20. The battery unit 10 includes a housing 11 and a battery cell assembly 12 accommodated in the housing 11. The battery cell assembly 12 includes a plurality of battery cells stacked and electrically connected in sequence. The mounting plate 20 is provided with a guide rail 30, and the housing 11 of the battery unit 10 is matched with the guide rail 30, so that the battery unit 10 is detachably arranged on the guide rail 30 along the first direction. Preferably, the battery unit 10 is detachably provided to the guide rail 30 in the first direction. In this embodiment, the first direction is the length direction of the battery unit 10, that is, the direction indicated by the arrow a in fig. 1.

Referring to fig. 3 and 4, along the first direction a, a first connecting member 13 and a second connecting member 14 are respectively disposed on opposite sides of the housing 11, the positive electrode and the negative electrode of the battery module 12 are also respectively disposed on opposite ends of the battery unit 10, and the first connecting member 13 and the second connecting member 14 are respectively electrically connected to the positive electrode and the negative electrode of the battery module 12. The outer surface of the first connecting member 13 is provided with a first positioning member 131, the outer surface of the second connecting member 14 is provided with a second positioning member 141, and the first positioning member 131 is configured to be in matching connection with the second positioning member 141 between two adjacent battery units 10 along the first direction a. In an alternative embodiment, the first positioning member 131 is disposed substantially coaxially with the second positioning member 141, i.e., the first positioning member 131 substantially overlaps the second positioning member 141 as viewed in the first direction a.

In the embodiment of the present application, the first positioning member 131 and the second positioning member 141 have electrical conductivity, the number of the battery units 10 is two, and the two battery units 10 are sequentially connected along the first direction a, wherein the first positioning member 131 of one battery unit 10 is inserted into the second positioning member 141 of the other battery unit 10, so as to realize positioning and electrical connection of the two battery units 10. It should be understood that in other embodiments, the number of the battery units 10 may be one or more than two, so long as the actual requirement is satisfied, and the present application is not limited thereto.

The housing 11 includes a cover 111, a side plate 112, a first end cap 113, and a second end cap 114. The first end cover 113 and the second end cover 114 are disposed opposite to each other along the first direction a, the two cover plates 111 are disposed opposite to each other along the second direction, and the two side plates 112 are disposed opposite to each other along the third direction. The second direction is the direction indicated by the arrow B in fig. 3, and the third direction is the direction indicated by the arrow C in fig. 3. The first direction A, the second direction B and the third direction C are perpendicular to each other.

The first end cover 113 and the second end cover 114 are respectively fixed to both ends of the side plate 112. The first connector 13 is secured to the first end cap 113 and the second connector 14 is secured to the second end cap 114. In the present embodiment, the first connector 13 and the second connector 14 are located on the same side of the battery cells 10 to facilitate the insertion and installation of different battery cells 10 into each other.

The first end cover 113 is further provided with a recess 1131, the first connecting member 13 is disposed in the recess 1131, and along the extending direction of the first positioning member 131, the end surface of the first positioning member 131 does not exceed the outer surface of the first connecting member 13. The end surface of the second positioning member 141 protrudes from the outer surface of the second end cap 114 in the first direction a. The first positioning piece 131 and the second positioning piece 141 are respectively in embedded and protruding designs, so that when the adjacent battery units 10 are assembled together, the second positioning piece 141 is in opposite insertion fit with the first positioning piece 131 at the concave portion 1131, the gap between the adjacent battery units 10 in the first direction A is reduced, the overall size minimization of the energy storage system 100 is guaranteed, and meanwhile, the lightweight design of the energy storage system 100 is also facilitated.

Further, when the first connecting member 13, the side plate 112 and the second connecting member 14 are overlapped as viewed along the first direction a, so that when two adjacent battery units 10 are quickly inserted and matched, the stress direction is transferred to the side plate, and the first connecting member 13 and the second connecting member 14 are damaged due to overlarge stress.

The positive electrode and the negative electrode of the battery cell assembly 12 are designed at two ends of the battery cell 10, so that quick plug connection among different battery cells 10 can be realized, meanwhile, the connection internal resistance, the overall dimension and the whole package weight of the single battery cell 10 can be effectively reduced, and the battery cell assembly has good effects of realizing light weight, improving the whole package volume energy density and reducing the cost of an electric connection assembly (such as copper bars and the like).

Referring to fig. 5, 6 and 7, the first positioning member 131 includes a first protrusion 1311 and a first receiving portion 1312, and the second positioning member 141 includes a second protrusion 1411 and a second receiving portion 1412. Along the first direction a, the first protrusion 1311 and the second receiving part 1412 are coaxially disposed, and the first protrusion 1311 is connected with the second receiving part 1412 in a matching manner between adjacent battery cells 10; the first receiving portion 1312 is coaxially disposed with the second protruding portion 1411, and the first receiving portion 1312 is connected with the second protruding portion 1411 in a matching manner between adjacent battery cells 10. When the two battery units 10 are assembled together, as shown in fig. 1, the second protrusion 1411 of one battery unit 10 is inserted into the first receiving portion 1312 of the other battery unit 10, and the second receiving portion 1412 is sleeved on the first protrusion 1311 of the other battery unit 10. The first protrusion 1311, the first receiving part 1312, the second protrusion 1411, and the second receiving part 1412 are engaged with each other, so that the precise positioning and rapid assembly between the battery cells 10 can be achieved, and the installation efficiency can be improved.

The first protruding portions 1311 are located and number of the second receiving portions 1412 in one-to-one correspondence, and the first receiving portions 1312 are located and number of the second protruding portions 1411 in one-to-one correspondence. In the embodiment of the present application, the number of the first protruding portion 1311 and the second receiving portion 1412 is two, and the number of the first receiving portion 1312 and the second protruding portion 1411 is one. The two first protruding portions 1311 are symmetrically disposed on both sides of the first receiving portion 1312, and the two second receiving portions 1412 are symmetrically disposed on both sides of the second protruding portion 1411. In other embodiments, the positions and the number of the first protrusion 1311, the first receiving portion 1312, the second protrusion 1411, and the second receiving portion 1412 may be set according to actual needs, and the present application is not limited thereto. In this embodiment, the first connecting member 13 and the second connecting member 14 are electrically connected to the battery cell through structural design, and meanwhile, the functions of mutual positioning, butting and positioning are also provided, in other embodiments, the first connecting member 13 and the second connecting member 14 may be separately provided, and the connection between the battery units 10 may be achieved through mutually matched butting connectors.

The battery unit 10 further includes a first conductive member 15 and a second conductive member 16, where the first conductive member 15 electrically connects the positive electrode of the battery cell assembly 12 with the first connection member 13, and the second conductive member 16 electrically connects the negative electrode of the battery cell assembly 12 with the second connection member 14.

Referring to fig. 8 and 9, along the first direction a, the energy storage system 100 further includes a plurality of first rollers 41 and a plurality of second rollers 42, and the first rollers 41 and the second rollers 42 are rotatably disposed on the guide rail 30. The first roller 41 and the second roller 42 facilitate moving the battery unit 10 on the guide rail 30, reducing the thrust force applied to the battery unit 10 by the installer at the time of installation. In the first direction a, the distance between two adjacent first rollers 41 is smaller than the distance between two adjacent second rollers 42. The plurality of first rollers 41 and the plurality of second rollers 42 serve to guide the battery cells 10 to the guide rail 30. Further, the plurality of second rollers 42 also serve to buffer the moving speed of the battery unit 10. Specifically, when the battery cell 10 slides in from the front end of the guide rail 30, the relatively dense first rollers 41 can reduce friction between the battery cell 10 and the guide rail 30, allowing the battery cell 10 to smoothly slide into the guide rail 30. As the battery unit 10 enters the rail 30, the relatively sparse second roller 42 reduces the speed of movement of the battery unit 10 on the rail, reducing excessive impact of the battery unit 10 when in place.

With continued reference to fig. 9, 10 and 11, the guide rail 30 includes a main body 31 and a guide 32. The main body 31 has a substantially hollow rectangular parallelepiped structure, and a part of the first roller 41 and a part of the second roller 42 are rotatably disposed in a hollow receiving groove 312 of the main body 31. Along the second direction B, the upper surface of the main body 31 is provided with openings 311 corresponding to the first roller 41 and the second roller 42, and the first roller 41 and the second roller 42 partially protrude from the openings 311 on the surface of the main body 31 to support the battery unit 10. The lower surface of the body 31 is fixedly coupled to the mounting plate 20, thereby fixing the guide rail 30 to the mounting plate 20. The guiding portion 32 is located above the main body portion 31, the guiding portion 32 includes a first limiting portion 321 and a second limiting portion 322, the first limiting portion 321 is connected to the outer side of the main body portion 31 and extends along the second direction B, and the second limiting portion 322 is connected to the first limiting portion 321 and is disposed opposite to the upper surface of the main body portion 31. Preferably, the second limiting portion 322 is vertically connected to the first limiting portion 321. Along the third direction C, the width of the second limiting portion 322 is smaller than the width of the main body portion 31. A guide groove 323 is formed between the first limiting portion 321, the second limiting portion 322 and the upper surface of the main body portion 31. The side plate 112 is at least partially disposed in the guide groove 323 and abuts against the first roller 41 or the second roller 42. In the embodiment of the present application, the main body 31 and the guide 32 are integrally formed. Preferably, the body 31 and the guide 32 are integrally formed by aluminum extrusion, and the present application is not limited thereto.

Referring to fig. 11, 12 and 13, a positioning portion 1121 is disposed on a side of the side plate 112 facing away from the battery module 12, and the positioning portion 1121 is movably disposed in the guiding slot 323. Along the second direction B, the lower surface of the positioning portion 1121 abuts against the first roller 41 and the second roller 42, and a gap is left between the upper surface of the positioning portion 1121 and the second limiting portion 322, so as to reduce the problem of jamming.

Further, a plurality of mounting portions 33 are further provided in the guide rail 30, and the plurality of mounting portions 33 are provided in the receiving groove 312 of the main body 31 and fixedly connected to the main body 31. The plurality of first rollers 41 and the plurality of second rollers 42 are rotatably mounted in turn to the plurality of mounting portions 33. A first roller 41 or a second roller 42 is provided on one of the mounting portions 33. Along the second direction B, the parts of the first roller 41 and the second roller 42 protruding from the main body 31 support against the battery unit 10, and the parts of the first roller 41 and the second roller 42 located in the accommodating groove 312 of the main body 31 are spaced from the bottom plate of the main body 31, so that the force of the battery unit 10 on the guide rail 30 is transferred to the mounting plate 20, the stress of the roller body is reduced, the service life of the roller is prolonged, and the overall safety performance of the energy storage system 100 is improved.

Along the first direction a, a through hole 1122 is formed at an end of the positioning portion 1121 adjacent to the first end cap 113, and the battery unit 10 further includes a third positioning member 17, where the third positioning member 17 is disposed at an end of the positioning portion 1121 adjacent to the second end cap 114. Between adjacent battery units 10, the third positioning member 17 is detachably connected to the through hole 1122, and the third positioning member 17 includes a first portion 171 and a second portion 172, and preferably, the second portion 172 has a diameter smaller than or equal to the diameter of the through hole 1122, which facilitates the insertion of the second portion 172 into the through hole 1122 during the mounting process. Preferably, the diameter of the first portion 171 is greater than the diameter of the through hole 1122, which facilitates an interference fit between the first portion 171 and the positioning portion 1121.

When two adjacent battery units 10 are assembled, the third positioning piece 17 of one battery unit 10 is inserted into the through hole 1122 of the other battery unit 10, so that the matching position accuracy of the front and rear battery units 10 is improved, and the reliability of mechanical connection and electrical connection is facilitated. The third positioning member 17 includes, but is not limited to, a positioning part such as a pin.

The side plate 112 is further provided with a plurality of heat dissipation fins 1123 on a side facing away from the battery cell assembly 12, and the plurality of heat dissipation fins 1123 are used for increasing the heat dissipation area of the battery cell 10, so that the temperature of the battery cell 10 can be effectively reduced. Further, along the first direction a, the side plate 112 is further provided with a plurality of lightening holes 1124 for reducing the weight of the battery unit 10, which is beneficial to the lightweight design of the energy storage system 100.

Referring to fig. 9, 14 and 15, the mounting plate 20 is provided with a bump 21, and the bump 21 abuts against one end of the guide rail 30. The bump 21 is further provided with a hole 211, and the third positioning member 17 is accommodated in the hole 211.

The end surface of the third positioning member 17 exposed from the side plate 112 is a positioning surface 173. When the first battery unit 10 is assembled, the side plate 112 of the battery unit 10 is aligned with the guide groove 323 on the guide rail 30, so that the battery unit 10 can slide into the guide rail 30, when the battery unit 10 slides into one end of the guide rail 30 towards the protruding block 21, the third positioning piece 17 arranged on the side plate 112 is matched with the hole 211 on the protruding block 21, the inserting hole 211 of the third positioning piece 17, and when the positioning surface of the third positioning piece 17 abuts against the bottom surface of the hole 211, the battery unit 10 stops sliding, and the assembly positioning between the first battery unit 10 and the mounting plate 20 is realized.

Referring to fig. 16 and 17, in some embodiments, the energy storage system 100 further includes a connecting rod 50, and the connecting rod 50 is connected between two adjacent battery units 10 to connect the battery units 10. The connecting rod 50 is detachably arranged between two adjacent battery units 10, which is beneficial to maintenance and replacement. In the first direction a, a connecting hole 51 is formed at one end of the connecting rod 50, and the connecting hole 51 is disposed substantially coaxially with the through hole 1122 of the positioning portion 1121 of the side plate 112. The opposite end of the connecting rod 50 is provided with a locating boss 52. Preferably, the connecting rod 50 is a one-shot structure, for example, the connecting rod 50 is integrally formed by injection molding or aluminum extrusion molding. Preferably, the connecting holes 51 are provided at opposite ends of the connecting rod 50, and the positioning protrusion 52 is provided at one of the connecting holes 51. Preferably, the positioning protrusion 52 is detachably disposed in one of the connection holes 51.

The positioning projection 52 includes a first end 521 and a second end 522, the second end 522 having a diameter less than or equal to the diameter of the through-hole 1122 to facilitate insertion of the second end 522 into the through-hole 1122 during installation. Preferably, the diameter of the first end 521 is larger than the diameter of the connecting hole 51, which is advantageous for interference connection between the first end 521 and the positioning portion 1121 of the connecting rod 50.

Preferably, the diameter of the second portion 172 is smaller than or equal to the diameter of the connecting hole 51, which facilitates the insertion of the second portion 172 into the connecting hole 51 during the installation process. Preferably, the diameter of the first portion 171 is greater than the diameter of the connecting hole 51, facilitating an interference connection between the first portion 171 and the connecting rod 50. Further, the cross-sectional shape of the connecting rod 50 is substantially the same as the cross-sectional shape of the positioning portion 1121 of the side plate 112.

In some embodiments, the side plate 112 has a through hole 1122 at an end near the first end cap 113, and the side plate 112 has a through hole 1122 at an end near the second end cap 114. The opposite ends of the connecting rod 50 are provided with positioning protrusions 52, wherein one positioning protrusion 52 is arranged in the through hole 1122 close to the first end cover 113, and the other positioning protrusion 52 is arranged in the through hole 1122 close to the second end cover 114, which is beneficial to further simplifying the structure of the battery cell 10. In some embodiments, when the first battery unit 10 is mounted, the connection hole 51 of the connection rod 50 is first engaged with the third positioning member 17 of the second battery unit 10, that is, the third positioning member 17 is inserted into the connection hole 51 of the connection rod 50, the positioning protrusion 52 of the connection rod 50 is disposed toward the first battery unit 10, then the connection rod 50 slides along the guide rail together with the second battery unit 10, and the positioning protrusion 52 of the connection rod 50 is inserted into the through hole 1122 of the side plate 112 of the first battery unit 10, the second connection member 14 of the second battery unit 10 is engaged with the first connection member 13 of the first battery unit 10, and the two battery units 10 are assembled. The two ends of the connecting rod 50 respectively support against the positioning parts 1121 on the side plates 112 of the two battery units 10, and the side plates 112 are stressed bodies, so that the stress between the first connecting piece 13 and the second connecting piece 14 in the assembly process is reduced. In other embodiments, after the first battery unit 10 is mounted, the positioning protrusion 52 is first engaged with the third positioning member 17 on the first battery unit 10, and then the second battery unit 10 is mounted, and the mounting sequence of the connecting rod 50 can be other ways, not limited thereto.

Referring again to fig. 1, 8 and 9, the energy storage system 100 further includes a fixing member 60, and the fixing member 60 is detachably mounted on the mounting plate 20 and located at a side of the guide rail 30. The battery unit 10 further includes a connecting piece 18, the connecting piece 18 is protruding outside the housing 11, and the connecting piece 18 is detachably connected to the fixing piece 60.

Specifically, the connecting pieces 18 are disposed on opposite sides of the first end cap 113 along the third direction C, and the number of the fixing members 60 corresponds to the number of the connecting pieces 18 one by one. After the battery unit 10 is installed in the guide rail 30 and positioned, the fixing piece 60 is fixedly connected with the mounting plate 20 through fasteners such as bolts, and then the connecting piece 18 and the fixing piece 60 are mechanically locked and fixed through the fasteners such as bolts, so that the battery unit 10 is ensured to be mounted in place, and the operation of manually and repeatedly adjusting the mounting position is reduced. In the embodiment of the present application, the positioning of the battery unit 10 and the mechanical fixing of the battery unit 10 fully consider the ergonomic problem, and have convenient assemblability.

Referring to fig. 18 and 19, in one embodiment, an energy storage system 100' has a plurality of battery cells 10 and a plurality of mounting plates 20. N battery units 10 are installed on each installation plate 20 to form battery modules, N is a natural number, a plurality of modules can be stacked or arranged in parallel, and electric connection can be realized between part of adjacent battery modules by using conductive members such as cables 101. The energy storage system 100' further includes a cabinet 70, and the battery module formed by the battery unit 10 and the mounting plate 20 is disposed in the cabinet 70. In this embodiment, the battery module may realize a combination of a plurality of battery units 10, and the battery module may be combined in a flat-stacked manner and in a vertical manner, so that the battery module has very convenient operability under the condition that the cabinet 70 is deep, and can adapt to any combination of cabinet shapes, thereby realizing the requirement of large electric quantity.

Under the requirement of large electric quantity, after the N battery modules are assembled, the battery modules are connected in series through cables, and the high-voltage cables led out from the total positive and total negative of the battery modules are connected with other parts of the cabinet 70. In a flat cabinet 70 or a vertical cabinet 70, the positioning and mechanical fixing structure of the design of the plurality of battery cells 10 can be realized quickly, thereby facilitating quick installation.

When thermal runaway occurs in one battery cell 10, the battery cells 10 can be effectively separated by the mounting plate 20, and the occurrence of thermal runaway in adjacent battery cells 10 is reduced, thereby improving the overall thermal safety.

Referring to fig. 20, an embodiment of the present application further provides a powered device 200, where the powered device 200 includes the energy storage system 100 described in the foregoing embodiment.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present application.

Claims

An energy storage system, comprising:

a mounting plate;

a plurality of battery cells provided to the mounting plate;

the battery pack is characterized in that a guide rail is arranged on the mounting plate, and the battery unit is detachably arranged on the guide rail along a first direction;

each battery unit comprises a shell and a battery cell assembly accommodated in the shell, wherein a first connecting piece and a second connecting piece are respectively arranged on two opposite sides of the shell along the first direction, and the first connecting piece and the second connecting piece are respectively and electrically connected with the positive electrode and the negative electrode of the battery cell assembly;

the outer surface of the first connecting piece is provided with a first positioning piece, the outer surface of the second connecting piece is provided with a second positioning piece, and the first positioning piece is configured to be in matched connection with the second positioning piece along the first direction between the adjacent battery units.
The energy storage system of claim 1, wherein the first positioning member comprises a first protrusion and a first receptacle, the second positioning member comprises a second protrusion and a second receptacle, the first protrusion is matingly coupled to the second receptacle and the first receptacle is matingly coupled to the second protrusion along the first direction.
The energy storage system of claim 1, further comprising a plurality of first rollers and a plurality of second rollers in said first direction, said first rollers and said second rollers rotatably disposed on said rail, a distance between adjacent two of said first rollers being less than a distance between adjacent two of said second rollers.
The energy storage system of claim 3, wherein the housing includes a side plate, the rail has a guide slot, and the side plate is at least partially disposed in the guide slot and abuts the first roller or the second roller.
The energy storage system of claim 4, wherein the rail comprises a main body portion and a guide portion, the first roller and the second roller are disposed on the main body portion, the guide portion comprises a first limit portion and a second limit portion, the first limit portion is connected to the main body portion and extends along a second direction, the second limit portion is disposed opposite to the main body portion, the second direction is perpendicular to the first direction, and the first limit portion, the second limit portion, and the main body portion form the guide slot.
The energy storage system of claim 4, wherein a positioning portion is disposed on a side of the side plate facing away from the cell assembly, the positioning portion is movably disposed in the guide slot, the positioning portion is provided with a through hole along the first direction, the battery unit further comprises a third positioning member, the third positioning member and the through hole are disposed opposite to each other along the first direction, and the third positioning member between adjacent battery units is disposed in the through hole.
The energy storage system of claim 4, further comprising a connecting rod disposed between adjacent cells, wherein an end of the connecting rod is provided with a locating protrusion.
The energy storage system of claim 6, wherein the mounting plate has a protrusion, the protrusion abuts one end of the rail, the protrusion further has a hole, and the second end of the positioning member is received in the hole.
The energy storage system of claim 1, further comprising a securing member removably mounted to the mounting plate and positioned on a side of the rail, the battery unit further comprising a connecting tab protruding outside of the housing, the connecting tab removably connected to the securing member.
A powered device comprising the energy storage system of any of claims 1-9.