Energy storage device and energy storage battery pack

Abstract

The utility model provides an energy storage device which comprises at least one fixing frame and a battery pack, the fixing frame comprises a first supporting piece, a first positioning piece, a second supporting piece, a second positioning piece and a pair of connecting pieces, the pair of connecting pieces are arranged oppositely at intervals, the first supporting piece is detachably connected to the bottom of the first side of the pair of connecting pieces, and the second supporting piece is detachably connected to the bottom of the second side of the pair of connecting pieces. The second supporting piece is detachably connected to the bottoms of the second sides of the pair of connecting pieces, the first sides directly face the second sides, the first positioning piece is detachably connected to the tops of the first sides of the pair of connecting pieces, and the second positioning piece is detachably connected to the tops of the second sides of the pair of connecting pieces. A containing space is defined by the pair of connecting pieces, the first supporting piece, the first positioning piece, the second supporting piece and the second positioning piece. The battery pack is accommodated in the accommodating space. The utility model further provides an energy storage battery pack.

Description

Technical Field

[0001] The utility model relates to the field of energy storage batteries, in particular to an energy storage device and an energy storage battery pack provided with the energy storage device. Background Art

[0002] Some battery packs in the prior art generally include a battery cell group and a fixing frame surrounding the battery cell group. The fixing frame includes a pair of opposite side plates and a pair of opposite end plates. The pair of end plates are respectively fixedly connected to opposite ends of the pair of side plates. The pair of side plates and the pair of end plates enclose a receiving space for accommodating the battery cell group. However, the existing fixing frame cannot be modularized and has a relatively high manufacturing cost. Summary of the Utility Model

[0003] The present application provides an energy storage device and an energy storage battery pack provided with the energy storage device.

[0004] An energy storage device provided by the present application includes at least one fixing frame and a battery group. The fixing frame includes a first support member, a first positioning member, a second support member, a second positioning member, and a pair of connecting members. The pair of connecting members are spaced apart from each other and are disposed opposite to each other. The first support member is detachably connected to the bottom of the first side of the pair of connecting members. The second support member is detachably connected to the bottom of the second side of the pair of connecting members. The first side faces the second side. The first positioning member is detachably connected to the top of the first side of the pair of connecting members. The second positioning member is detachably connected to the top of the second side of the pair of connecting members. The pair of connecting members, the first support member, the first positioning member, the second support member, and the second positioning member enclose a receiving space; the battery group is accommodated in the receiving space.

[0005] The present application further provides an energy storage battery pack, which includes a housing, a battery management system, and an energy storage device. The energy storage device includes at least one fixing frame and a battery group. The fixing frame includes a first support member, a first positioning member, a second support member, a second positioning member, and a pair of connecting members. The pair of connecting members are spaced apart from each other and are disposed opposite to each other. The first support member is detachably connected to the bottom of the first side of the pair of connecting members. The second support member is detachably connected to the bottom of the second side of the pair of connecting members. The first side faces the second side. The first positioning member is detachably connected to the top of the first side of the pair of connecting members. The second positioning member is detachably connected to the top of the second side of the pair of connecting members. The pair of connecting members, the first support member, the first positioning member, the second support member, and the second positioning member enclose a receiving space; the battery group is accommodated in the receiving space; the battery management system and the energy storage device are accommodated in the inner cavity of the housing, and the battery management system is electrically connected to the battery group of the energy storage device.

[0006] In the present utility model, the energy storage device can be provided with at least one fixed frame as required, and the accommodation space of at least one fixed frame accommodates the battery pack. Therefore, the energy storage device of the present utility model can be provided with two or more fixed frames as required to realize the modularization of the fixed frame of the energy storage device, which can not only be applicable to different models of energy storage battery packs, but also has lower manufacturing costs and installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the implementation will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0008] Figure 1 is a three-dimensional structural schematic diagram of an energy storage battery pack in one embodiment of the present application;

[0009] Figure 2 is Figure 1 a three-dimensional structural schematic diagram of the energy storage battery pack in another perspective;

[0010] Figure 3 is Figure 1 a three-dimensional structural exploded view of the energy storage battery pack in;

[0011] Figure 4 is Figure 2 a three-dimensional structural exploded view of the energy storage battery pack in;

[0012] Figure 5 is Figure 3 a three-dimensional structural exploded view of the energy storage device and the battery management system in;

[0013] Figure 6 is Figure 4 a three-dimensional structural exploded view of the energy storage device and the battery management system in;

[0014] Figure 7 is Figure 5 a three-dimensional structural exploded view of the energy storage device in;

[0015] Figure 8 is Figure 6 a three-dimensional structural exploded view of the energy storage device in;

[0016] Figure 9 is Figure 7 a further three-dimensional structural exploded view of the energy storage device in;

[0017] Figure 10 is Figure 8Schematic diagram of further three-dimensional structural decomposition of the energy storage device in

[0018] Figure 11 is Figure 9 Schematic diagram of three-dimensional structural decomposition of the fixing frame in

[0019] Figure 12 is Figure 10 Schematic diagram of three-dimensional structural decomposition of the fixing frame in

[0020] Figure 13 is Figure 11 Enlarged three-dimensional structure diagram of one of the first support members and the first positioning member in

[0021] Figure 14 is Figure 12 Enlarged three-dimensional structure diagram of one of the first support members and the first positioning member in

[0022] Figure 15 is Figure 11 Enlarged three-dimensional structure diagram of one of the second support members and the second positioning member in

[0023] Figure 16 is Figure 12 Enlarged three-dimensional structure diagram of one of the second support members and the second positioning member in

[0024] Figure 17 is Figure 11 Enlarged three-dimensional structure diagram of one of the connecting members in

[0025] Figure 18 is Figure 17 Schematic diagram of three-dimensional structure of another view of the connecting member in

[0026] Main label description:

[0027] 100, energy storage battery pack; 20, housing; 22, box body; 220, accommodating space; 221, bottom plate; 223, side plate; 225, end plate; 226, positioning strip; 227, clamping hole; 24, sealing cover; 242, cover plate; 244, sealing edge; 245, clamping block; 246, conductive through hole; 40, energy storage device; 41, fixing frame; 42, first support member; 421, first support strip; 423, first connecting strip; 424, first weight reduction notch; 426, first weight reduction groove; 427, first adjustment hole; 428, first connecting hole; 43, first positioning member; 432, first positioning strip; 434, third connecting strip; 435, third adjustment hole; 436, third weight reduction groove; 437, third connecting hole; 44, second support member; 441, second support strip; 443, second connecting strip; 444, second weight reduction notch; 446, second weight reduction groove; 447, second adjustment hole; 448, second connecting hole; 45, second positioning member; 452, second positioning strip; 455, fourth adjustment hole; 457, fourth connecting hole; 46, connecting member; 462, connecting plate; 464, first connecting tab; 4642, first positioning hole; 466, second connecting tab; 4662, second positioning hole; 467, connecting rib; 4672, third positioning hole; 469, second separator; 47, welding connecting piece; 472, rib; 474, nickel sheet; 48, battery pack; 482, battery cell; 485, first separator; 486, positive electrode tab; 487, negative electrode tab; 50, separator; 52, first buffer member; 521, first middle buffer strip; 523, second middle buffer strip; 54, second buffer member; 542, side buffer strip; 544, first end buffer block; 546, second end buffer block; 56, third buffer member; 562, first top buffer block; 564, second top buffer block; 60, battery management system; 62, circuit main board; 64, radiator; 66, conducting wire; 662, conducting cylinder. Detailed implementation manners

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In addition, the descriptions of the following embodiments refer to the attached drawings to illustrate specific embodiments in which the present application can be implemented. The directional terms mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0030] In the description of the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to", and "disposed on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] Please refer to Figures 1 to 6 , in one embodiment of the present utility model, the energy storage battery pack 100 includes a housing 20, an energy storage device 40, and a battery management system 60. The energy storage device 40 and the battery management system 60 are accommodated in the inner cavity of the housing 20. The housing 20 includes a box body 22 and a sealing cover 24. The box body 22 is provided with an accommodation space 220. The energy storage device 40 and the battery management system 60 are accommodated in the accommodation space 220. The sealing cover 24 covers the accommodation space 220 and is hermetically connected to the top of the box body 22. The energy storage device 40 includes at least one fixing frame 41 and a battery pack 48. The fixing frame 41 includes a first support member 42, a first positioning member 43, a second support member 44, a second positioning member 45, and a pair of connecting members 46. The pair of connecting members 46 are spaced apart from each other and are disposed opposite to each other. The first support member 42 is detachably connected to the bottom of the first side of the pair of connecting members 46. The second support member 44 is detachably connected to the bottom of the second side of the pair of connecting members 46. The first side and the second side are respectively located on opposite sides of the fixing frame 41. The pair of connecting members 46 are respectively located at opposite ends of the fixing frame 41. The first positioning member 43 is detachably connected to the top of the first side of the pair of connecting members 46. The second positioning member 45 is detachably connected to the top of the second side of the pair of connecting members 46. The pair of connecting members 46, the first support member 42, the first positioning member 43, the second support member 44, and the second positioning member 45 enclose an accommodation space, and the battery pack 48 is accommodated in the accommodation space of the fixing frame 41. The battery management system 60 is electrically connected to the battery pack of the energy storage device 40. The battery management system 60 is used to monitor the state of the battery pack 48 and control the charging and discharging process of the battery pack 48 to ensure the use safety and performance of the battery pack 48.

[0032] In this embodiment, the energy storage device 40 includes two fixed frames 41 and two battery packs 48. One side of one fixed frame 41 is detachably connected to one side of the other fixed frame 41, and the two battery packs 48 are respectively accommodated in the accommodation spaces of the two fixed frames 41. The fixed frame 41 is modularly designed, and the energy storage device 40 can be provided with one or a plurality of connected fixed frames 41 according to actual needs. A battery pack 48 is installed in the accommodation space of each fixed frame 41; that is, in other embodiments, the energy storage device 40 may include more than two fixed frames 41 and more than two battery packs 48. The more than two fixed frames 41 are arranged in the first direction, and every two adjacent fixed frames 41 are detachably connected. The more than two battery packs 48 are respectively accommodated in the accommodation spaces of the more than two fixed frames 41, and the first direction is the width direction of the fixed frame 41.

[0033] It can be understood that the "top" refers to the end of the energy storage battery pack 100 that is away from the support surface when the energy storage battery pack 100 is placed on the support surface during normal use, and the "bottom" refers to the end of the energy storage battery pack 100 that is close to the support surface when the energy storage battery pack 100 is placed on the support surface during normal use. A heat dissipation system, an electrical system, etc. are also provided in the housing 20 of the energy storage battery pack 100. The "connection" in the description of the embodiments of the present invention includes two cases of direct connection and indirect connection. For example, the connection between A and B includes the direct connection between A and B or the connection through a third element C or more other elements. The connection also includes two cases of integral connection and non-integral connection. The integral connection means that A and B are integrally formed and connected, and the non-integral connection means that A and B are non-integrally formed and connected.

[0034] The energy storage device 40 in the present invention can be provided with at least one fixed frame 41 according to needs, and the accommodation space of the at least one fixed frame 41 accommodates the battery pack 48. Therefore, the energy storage device 40 of the present invention can be provided with two or more fixed frames 41 according to needs to realize the modularization of the fixed frames 41 of the energy storage device 40, which can not only be applicable to different models of energy storage battery packs, but also has lower manufacturing costs and installation costs.

[0035] Such as Figures 1 - 4As shown, the box body 22 includes a rectangular bottom plate 221, a pair of side plates 223 and a pair of end plates 225. The pair of side plates 223 are respectively connected to the opposite two side edges of the bottom plate 221, and the pair of end plates 225 are respectively connected to the opposite two end edges of the bottom plate 221. The opposite two ends of one side plate 223 are respectively connected to the pair of end plates 225, and the opposite two ends of the other side plate 223 are respectively connected to the pair of end plates 225. The bottom plate 221, the pair of side plates 223 and the pair of end plates 225 enclose an accommodation space 220. A circle of stop strips 226 is provided on one side of the outer peripheral wall of the box body 22 away from the bottom plate 221. A plurality of clamping holes 227 are provided on the outer surface of the side plate 223 at the top of the stop strip 226, and a plurality of clamping holes 227 are provided on the outer surface of the end plate 225 at the top of the stop strip 226. The sealing cover 24 includes a rectangular cover plate 242 and a sealing edge 244 provided on a circle at the edge of the cover plate 242. A plurality of clamping blocks 245 are provided on the inner peripheral surface of the sealing edge 244; when the sealing cover 24 covers the box body 22, the cover plate 242 covers the accommodation space 220, and the sealing edge 244 is hermetically sleeved on one side of the pair of side plates 223 and the pair of end plates 225 away from the bottom plate 221, and the plurality of clamping blocks 245 are respectively clamped in the plurality of clamping holes 227. One end of the cover plate 242 is provided with two electrically conductive mounting holes 246 spaced apart from each other. One of the electrically conductive mounting holes 246 is used for mounting a positive conductive end, and the other electrically conductive mounting hole 246 is used for mounting a negative conductive end.

[0036] Please refer to Figures 7 - 12, every two adjacent fixing frames 41 are connected to each other along their width directions, and this first direction is parallel to the width direction of the fixing frame 41; specifically, the two second support members 44 of every two adjacent fixing frames 41 face each other and are detachably connected to two pairs of connecting members 46, and the two second positioning members 45 of every two adjacent fixing frames 41 face each other and are detachably connected to two pairs of connecting members 46. The first support member 42 includes a first support strip 421 and a first connecting strip 423 connected to one side of the first support strip 421. The second support member 44 includes a second support strip 441 and a second connecting strip 443 connected to one side of the second support strip 441. The first support strip 421 and the second support strip 441 respectively support the bottom surface of the battery pack 48, and the first connecting strip 423 and the second connecting strip 443 are respectively detachably connected to a pair of connecting members 46. In this embodiment, both the first support strip 421 and the second support strip 441 are rectangular support sheets, and the two support sheets support opposite sides of the bottom surface of the battery pack 48; both the first connecting strip 423 and the second connecting strip 443 are rectangular connecting sheets, and opposite ends of each connecting sheet are respectively connected to a pair of connecting members 46; preferably, the first support strip 421 of the first support member 42 is perpendicular to the first connecting strip 423, and the second support strip 441 of the second support member 44 is perpendicular to the second connecting strip 443. The battery pack 48 includes a plurality of battery cells 482 and a first separator 485 disposed between every two adjacent battery cells 482. The first separator 485 can isolate two adjacent battery cells 482 from each other; each battery cell 482 has a positive electrode tab 486 and a negative electrode tab 487. A second separator 469 is provided on the side of the connecting member 46 facing the battery pack 48, and the second separator 469 is used to isolate the connecting member 46 from the battery cell 482.

[0037] Optionally, the energy storage device 40 further includes a plurality of welding connection sheets 47. The plurality of welding connection sheets 47 are respectively welded to the positive electrode tabs 486 and the negative electrode tabs 487 of the battery pack 48. A rib 472 is provided on the side of the welding connection sheet 47 facing the battery pack 48, and the rib 472 is positioned in the gap between two adjacent battery cells 482; a nickel sheet 474 is provided on the welding connection sheet 47, and the nickel sheet 474 is used for welding the sampling wire harness for collecting the battery cell voltage.

[0038] Such as Figures 13 - 16As shown, a plurality of first weight-reducing notches 424 are formed in the first support bar 421. The plurality of first weight-reducing notches 424 are arranged at intervals in a second direction parallel to the length direction of the first support bar 421, and a first direction is perpendicular to the second direction. A plurality of second weight-reducing notches 444 are provided on the second support bar 441. The plurality of second weight-reducing notches 444 are arranged at intervals along the length direction of the second support bar 441. In this embodiment, a row of first weight-reducing notches 424 is located on the side of the first support bar 421 away from the first connecting bar 423, and a row of second weight-reducing notches 444 is located on the side of the second support bar 441 away from the second connecting bar 443. In other embodiments, a row of first weight-reducing notches 424 is provided on the side of the first support bar 421 close to the first connecting bar 423, and a row of second weight-reducing notches 444 is provided on the side of the second support bar 441 close to the second connecting bar 443. In other embodiments, a row of first weight-reducing notches 424 is provided in the middle of the first support bar 421, and a row of second weight-reducing notches 444 is provided in the middle of the second support bar 441. A first weight-reducing groove 426 is provided on the side of the first connecting bar 423 away from the first support bar 421. The first weight-reducing groove 426 extends along the length direction of the first connecting bar 423. A second weight-reducing groove 446 is provided on the side of the second connecting bar 443 away from the second support bar 441. The second weight-reducing groove 446 extends along the length direction of the second connecting bar 443. In other embodiments, the first weight-reducing groove 426 is provided on the side of the first connecting bar 423 close to the first support bar 421, and the second weight-reducing groove 446 is provided on the side of the second connecting bar 443 close to the second support bar 441. Forming the first weight-reducing notches 424 and the first weight-reducing groove 426 in the first support member 42 can not only reduce the weight of the first support member 42, but also save the material for manufacturing the first support member 42. Forming the second weight-reducing notches 444 and the second weight-reducing groove 446 in the second support member 44 can not only reduce the weight of the second support member 44, but also save the manufacturing material for manufacturing the second support member 44.

[0039] Optionally, at least one end of the opposite ends of the first connecting bar 423 is provided with a first adjustment hole 427. The length direction of the first adjustment hole 427 is parallel to the length direction of the first connecting bar 423. In this embodiment, one end of the first connecting bar 423 is provided with a first adjustment hole 427, and the opposite end of the first connecting bar 423 is provided with a first connection hole 428. At least one end of the opposite ends of the second connecting bar 443 is provided with a second adjustment hole 447. The length direction of the second adjustment hole 447 is parallel to the length direction of the second connecting bar 443. In this embodiment, one end of the second connecting bar 443 is provided with a second adjustment hole 447, and the opposite end of the second connecting bar 443 is provided with a second connection hole 448.

[0040] Optionally, the first positioning member 43 includes a first positioning strip 432 and a third connecting strip 434 connected to one side of the first positioning strip 432. The first positioning strip 432 is positioned on the top surface of the battery pack 48, and the opposite ends of the third connecting strip 434 are respectively detachably connected to a pair of connecting members 46. In this embodiment, the first positioning strip 432 is a rectangular positioning piece, and the third connecting strip 434 is a rectangular connecting piece. The first positioning strip 432 is perpendicular to the third connecting strip 434. The second positioning member 45 includes a second positioning strip 452, and the opposite ends of the second positioning strip 452 are respectively detachably connected to a pair of connecting members 46. In this embodiment, the second positioning strip 452 is a rectangular positioning piece. A third weight-reducing groove 436 is provided on the side of the third connecting strip 434 away from the first positioning strip 432, and the third weight-reducing groove 436 extends along the length direction of the third connecting strip 434. In other embodiments, the third weight-reducing groove 436 is provided on the side of the third connecting strip 434 close to the first positioning strip 432. Providing the third weight-reducing groove 436 on the first positioning member 43 can not only reduce the weight of the first positioning member 43, but also save the material for manufacturing the first positioning member 43. At least one end of the opposite ends of the third connecting strip 434 is provided with a third adjustment hole 435, and the length direction of the third adjustment hole 435 is parallel to the length direction of the third connecting strip 434. Specifically, a third adjustment hole 435 is provided at one end of the third connecting strip 434, and a third connecting hole 437 is provided at the opposite end of the third connecting strip 434. At least one end of the opposite ends of the second positioning strip 452 is provided with a fourth adjustment hole 455, and the length direction of the fourth adjustment hole 455 is parallel to the length direction of the second positioning strip 452. In this embodiment, a fourth adjustment hole 455 is provided at one end of the second positioning strip 452, and a fourth connecting hole 457 is provided at the opposite end of the second positioning strip 452.

[0041] In other embodiments, the opposite ends of the first connecting strip 423 are respectively provided with first adjustment holes 427, the opposite ends of the third connecting strip 434 are respectively provided with second adjustment holes 447, the opposite ends of the third connecting strip 434 are respectively provided with third adjustment holes 435, and the opposite ends of the second positioning strip 452 are respectively provided with fourth adjustment holes 455.

[0042] Such as Figures 11 - 12 and Figures 17 - 18As shown, the connecting member 46 includes a rectangular connecting plate 462, first connecting tabs 464 provided on opposite sides of the bottom of the connecting plate 462, second connecting tabs 466 provided on opposite sides of the top of the connecting plate 462, and a connecting rib 467 provided on the top of the connecting plate 462; the first connecting tabs 464, the second connecting tabs 466 and the connecting rib 467 are located on the same side of the connecting plate 462. Preferably, the first connecting tabs 464, the second connecting tabs 466 and the connecting rib 467 are all perpendicular to the connecting plate 462. The first connecting tab 464 is provided with a first positioning hole 4642, the second connecting tab 466 is provided with a second positioning hole 4662, and the connecting rib 467 is provided with a third positioning hole 4672.

[0043] In this embodiment, the first support member 42, the first positioning member 43, the second support member 44, the second positioning member 45 and the connecting member 46 are all made of metal materials. In other embodiments, the first support member 42, the first positioning member 43, the second support member 44, the second positioning member 45 and the connecting member 46 may also be made of hard plastic materials.

[0044] As Figures 7 - 12As shown, when assembling a fixed frame 41 and a battery pack 48, a pair of connecting members 46 are placed opposite to each other at intervals, with the first connecting tabs 464 of the pair of connecting members 46 facing away from each other; the first support member 42 is placed at the bottom of one side of the pair of connecting members 46, such that the first connecting hole 428 and the first adjusting hole 427 of the first support member 42 respectively face two first positioning holes 4642 on the same side, and the first support bar 421 is located between the two connecting plates 462. One locking member (such as a screw) is passed through the first connecting hole 428 and the corresponding first positioning hole 4642 and locked to a nut, and the other locking member (such as a screw) is passed through the first adjusting hole 427 and the corresponding first positioning hole 4642 and pre-locked to the nut. The second support member 44 is placed at the bottom of the opposite side of the pair of connecting members 46, such that the second connecting hole 448 and the second adjusting hole 447 of the second support member 44 respectively face the other two first positioning holes 4642, and the second support bar 441 is located between the two connecting plates 462. One locking member (such as a screw) is passed through the second connecting hole 448 and the corresponding first positioning hole 4642 and locked to the nut, and the other locking member (such as a screw) is passed through the fourth adjusting hole 455 and the corresponding first positioning hole 4642 and pre-locked to the nut. The second positioning member 45 is placed at the top of the other side of the pair of connecting members 46, such that the fourth adjusting hole 455 and the fourth connecting hole 457 of the second positioning member 45 respectively face two second positioning holes 4662; one locking member (such as a screw) is passed through the fourth connecting hole 457 and the corresponding second positioning hole 4662 and locked to the nut, and the other locking member (such as a screw) is passed through the fourth adjusting hole 455 and the corresponding second positioning hole 4662 and locked to the nut; a plurality of battery cells 482 of the battery pack 48 are respectively inserted between the pair of connecting members 46, with the bottom surface of each battery cell 482 placed at opposite ends on the first support bar 421 and the second support bar 441, and a first separator 485 is clamped between every two adjacent battery cells 482. The plurality of battery cells 482 are arranged along the length direction of the first support bar 421, and a second separator 469 is clamped between each connecting member 46 and the corresponding battery cell 482. The first positioning member 43 is placed on the side of the pair of connecting members 46 away from the second positioning member 45, such that the third connecting hole 437 faces the second positioning hole 4662 of one of the connecting members 46, and the third adjusting hole 435 faces the second positioning hole 4662 of the other connecting member 46. One locking member (such as a screw) is passed through the third connecting hole 437 and the second positioning hole 4662 and then locked to the nut, and the other locking member (such as a screw) is passed through the third adjusting hole 435 and the second positioning hole 4662 and then locked to the nut. The first positioning bar 432 of the first positioning member 43 abuts against the top surface of the battery pack 48. The battery pack 48 restricts the battery cells 482 in three dimensions through the fixed frame 41, preventing the movement of the battery cells 482.

[0045] Since the first support member 42, the second support member 44 and the second positioning member 45 of the fixing frame 41 are first installed on one of the connecting members 46, and then the battery pack 48 is pre-installed into the space surrounded by the first support member 42, the second support member 44 and the second positioning member 45, the first support bar 421 and the second support bar 441 respectively support opposite ends of the bottom of the battery pack 48, and then the other connecting member 46 is assembled to one end of the first support member 42, the second support member 44 and the second positioning member 45 away from the above-mentioned one connecting member 46, and the first positioning member 43 is fixed to a pair of connecting members 46, so that the first positioning bar 432 abuts against the top of the battery pack 48; therefore, the battery cells 482 can be installed into the fixing frame 41 one by one and then fixed, without pre-fixing; the fixing frame 41 can take into account the convenience of assembly, and can also play a role in restraining the battery cells 482, and at the same time can also play the role of a jig for assembling the battery cells 482. Since the first support member 42 is provided with a strip-shaped first adjustment hole 427, the second support member 44 is provided with a strip-shaped second adjustment hole 447, the first positioning member 43 is provided with a strip-shaped third adjustment hole 435, and the second positioning member 45 is provided with a strip-shaped fourth adjustment hole 455, the fixing frame 41 can take into account the tolerance problem of the battery cells 482 and avoid situations such as a small design tolerance of the fixing frame 41. Since the fixing frame 41 is made of a metal structure, the fixing frame 41 restrains the expansion direction of the battery pack 48, thereby increasing the service life of the battery pack 48 in cycles.

[0046] Optionally, an insulating spacer is provided between the first support member 42 and the battery pack 48, an insulating spacer is provided between the second support member 44 and the battery pack 48, an insulating spacer is provided between the first positioning member 43 and the battery pack 48, an insulating spacer is provided between the second positioning member 45 and the battery pack 48, and an insulating spacer is provided between the connecting member 46 and the battery pack 48. Optionally, the side surface of the first support member 42 facing the battery pack 48 is provided with an insulating layer, the side surface of the second support member 44 facing the battery pack 48 is provided with an insulating layer, the side surface of the first positioning member 43 facing the battery pack 48 is provided with an insulating layer, the side surface of the second positioning member 45 facing the battery pack 48 is provided with an insulating layer, and the side surface of the connecting member 46 facing the battery pack 48 is provided with an insulating layer.

[0047] When assembling the two fixing frames 41 and the two battery packs 48, place one pair of connecting pieces 46 facing each other at intervals, with the first connecting tabs 464 of this one pair of connecting pieces 46 facing away from each other. Place the other pair of connecting pieces 46 facing each other at intervals on one side of this one pair of connecting pieces 46, with the first connecting tabs 464 of the other pair of connecting pieces 46 facing away from each other. Place one of the first support members 42 at the bottom on one side of one pair of connecting pieces 46, such that the first support bar 421 of this one first support member 42 is located between the two connecting plates 462. Pass one locking member (such as a screw) through the first connection hole 428 and the corresponding first positioning hole 4642 and lock it to the nut. Pass the other locking member (such as a screw) through the first adjustment hole 427 and the corresponding first positioning hole 4642 and pre-lock it to the nut. Place the two second support members 44 at the bottom between the two pairs of connecting pieces 46, such that the second support bar 441 of one of the second support members 44 is located between the connecting plates 462 of one pair of connecting pieces 46, and the second support bar 441 of the other second support member 44 is located between the connecting plates 462 of the other pair of connecting pieces 46. The second connecting bars 443 of the two second support members 44 are in contact with each other. Pass one locking member (such as a screw) through the first positioning hole 4642 of one of the connecting pieces 46, the two second connection holes 448, and the first positioning hole 4642 of the other connecting piece 46 and then lock it to the nut. Pass the other locking member (such as a screw) through the first positioning hole 4642 of one of the connecting pieces 46, the two second adjustment holes 447, and the first positioning hole 4642 of the other connecting piece 46 and then lock it to the nut. Place the two second positioning members 45 at the top between the two pairs of connecting pieces 46, such that the fourth connection holes 457 of the two second positioning members 45 are aligned with the second positioning holes 4662 of the two connecting pieces 46, and the fourth adjustment holes 455 of the two second positioning members 45 are aligned with the second positioning holes 4662 of the other two connecting pieces 46. Pass one locking member (such as a screw) through the second positioning hole 4662 of one of the connecting pieces 46, the two fourth connection holes 457, and the second positioning hole 4662 of the other connecting piece 46 and then lock it to the nut. Pass the other locking member (such as a screw) through the second positioning hole 4662 of one of the connecting pieces 46, the two fourth adjustment holes 455, and the second positioning hole 4662 of the other connecting piece 46 and then lock it to the nut.Insert the multiple battery cells 482 of one of the battery packs 48 respectively between one pair of connecting members 46. The opposite ends of the bottom surface of each battery cell 482 are respectively placed on the first support bar 421 and the second support bar 441. A first separator 485 is clamped between every two adjacent battery cells 482. The multiple battery cells 482 are arranged along the length direction of the first support bar 421, and a second separator 469 is clamped between each connecting member 46 and the corresponding battery cell 482. Insert the multiple battery cells 482 of the other battery pack 48 respectively between the other pair of connecting members 46. The opposite ends of the bottom surface of each battery cell 482 are respectively placed on the first support bar 421 and the second support bar 441. A first separator 485 is clamped between every two adjacent battery cells 482. The multiple battery cells 482 are arranged along the length direction of the first support bar 421. Place one of the first positioning members 43 on one side of one pair of connecting members 46 facing away from the other pair of connecting members 46, such that the third connection hole 437 is aligned with the second positioning hole 4662 of one of the connecting members 46, and the third adjustment hole 435 is aligned with the second positioning hole 4662 of the other connecting member 46. Pass one locking member (such as a screw) through the third connection hole 437 and the second positioning hole 4662 and then lock it to the nut. Pass the other locking member (such as a screw) through the third adjustment hole 435 and the second positioning hole 4662 and then lock it to the nut. The first positioning bar 432 of the first positioning member 43 abuts against the top surface of one of the battery packs 48. Place the other first positioning member 43 on one side of the other pair of connecting members 46 facing away from one pair of connecting members 46, such that the third connection hole 437 is aligned with the second positioning hole 4662 of one of the connecting members 46, and the third adjustment hole 435 is aligned with the second positioning hole 4662 of the other connecting member 46. Pass one locking member (such as a screw) through the third connection hole 437 and the second positioning hole 4662 and then lock it to the nut. Pass the other locking member (such as a screw) through the third adjustment hole 435 and the second positioning hole 4662 and then lock it to the nut. The first positioning bar 432 of the first positioning member 43 abuts against the top surface of one of the battery packs 48.

[0048] According to actual requirements, more than two fixing frames 41 and more than two battery packs 48 can be assembled. The assembly method is the same as the above-mentioned assembly method and will not be elaborated here. Therefore, the fixing frames 41 and the battery packs 48 of the energy storage device 40 can be modularized, enabling multiple fixing frames 41 to be combined into one body, or being assembled, disassembled individually, which is convenient for manufacturing and assembly and saves costs.

[0049] Please refer to Figures 3 - 6, an isolator 50 is provided between the battery management system 60 and the energy storage device 40. The isolator 50 is connected to a pair of connecting members 46 of the energy storage device 40, and the battery management system 60 is connected to the side of the isolator 50 facing away from the connecting members 46. Specifically, the isolator 50 is a rectangular isolation sheet, which is placed on the connecting rib 467 of the connecting member 46, and a plurality of locking members respectively pass through the isolator 50 and are locked in the corresponding third positioning holes 4672. The battery management system 60 includes a circuit main board 62, a radiator 64 and a conductive wire 66. The circuit main board 62 is arranged on the side of the isolator 50 facing away from the energy storage device 40. Various electronic devices are provided on the circuit main board 62, and the circuit main board 62 is electrically connected to the battery pack 48; one end of the conductive wire 66 is electrically connected to the circuit main board 62, and the opposite end of the conductive wire 66 is provided with a conductive cylinder 662, and the conductive cylinder 662 is used for inserting into the conductive through hole 246. The battery management system 60 and the energy storage device 40 are isolated by the isolator 50, which reduces the influence of the heat generated by the power devices of the battery management system 60 on the battery cells 482 during the charging and discharging processes of the energy storage device 40.

[0050] Optionally, a first buffer member 52 is clamped between the isolator 50 and the energy storage device 40, and a second buffer member 54 is provided between the periphery of the energy storage device 40 and the housing 20. Specifically, the first buffer member 52 includes a pair of first middle buffer strips 521 and a second middle buffer strip 523 located between the pair of first middle buffer strips 521. The pair of first middle buffer strips 521 are located between the opposite sides of the isolator 50 and the welding connection piece 47, and the second middle buffer strip 523 is located between the middle of the isolator 50 and the welding connection piece 47. The second buffer member 54 includes two side buffer strips 542, a first end buffer block 544 and a second end buffer block 546. The two side buffer strips 542 are respectively arranged on the opposite sides of the energy storage device 40, and the side buffer strips 542 are clamped by the energy storage device 40 and the box body 22; three first end buffer blocks 544 are arranged at one end of the energy storage device 40, so that the three first end buffer blocks 544 are clamped by the energy storage device 40 and the box body 22, and the second end buffer block 546 is arranged at the opposite end of the energy storage device 40, so that the second end buffer block 546 is clamped by the energy storage device 40 and the box body 22. Further, a third buffer member 56 is provided between the isolator 50 and the sealing cover 24. Specifically, the third buffer member 56 includes a first top buffer block 562 and two second top buffer blocks 564. The first top buffer block 562 is located at one end of the top surface of the isolator 50, and the two second top buffer blocks 564 are located at the opposite ends of the top surface of the isolator 50. The circuit main board 62 and the radiator 64 are located between the first top buffer block 562 and the second top buffer blocks 564.

[0051] Such as Figures 1 - 6As shown, when assembling the energy storage battery pack 100, the first buffer member 52 is disposed on the top of the energy storage device 40, such that a pair of first middle buffer strips 521 are respectively located on opposite sides of the top, and the second middle buffer strip 523 is located between the pair of first middle buffer strips 521; the separator 50 and the battery management system 60 are disposed on the top of the energy storage device 40, such that the separator 50 is fixedly connected to the connecting rib 467 of the connecting member 46, and the first buffer member 52 is clamped between the separator 50 and the energy storage device 40, and the circuit main board 62 is electrically connected to the battery pack 48; two side buffer strips 542 are disposed on opposite sides of the energy storage device 40, and the first end buffer block 544 and the second end buffer block 546 are respectively disposed at opposite ends of the energy storage device 40; the energy storage device 40 and the battery management system 60 are placed together in the accommodating space 220 of the box body 22, such that the second buffer member 54 is clamped between the box body 22 and the energy storage device 40; the first top buffer block 562 is disposed at one end of the top surface of the separator 50 facing away from the energy storage device 40, and two second top buffer blocks 564 are spaced apart from each other and placed at opposite ends of the top surface of the separator 50 facing away from the energy storage device 40; the sealing cover 24 is covered on the third buffer member 56, such that the sealing edge 244 is sleeved on the side plate 223 and the end plate 225, each clamping block 245 is clamped in the corresponding clamping hole 227, and the sealing edge 244 abuts against the stop strip 226, and the first top buffer block 562 and the second top buffer blocks 564 are clamped between the cover plate 242 and the separator 50, and two conductive cylinders 662 are respectively inserted into two conductive through holes 246. Since buffer members are provided between the energy storage device 40 and the outer shell 20, these buffer members have buffering and shock-absorbing effects on the energy storage device 40, reduce the vibration of the energy storage device 40, can better protect the battery cell 482, protect the battery cell 482 from being damaged, and improve the safety and reliability of the energy storage battery pack 100.

[0052] The above is the implementation manner of the embodiment of the present utility model. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the principle of the embodiment of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. An energy storage device, characterized in that, The energy storage device includes: At least one fixed frame, the fixed frame includes a first support member, a first positioning member, a second support member, a second positioning member, and a pair of connecting members. The pair of connecting members are spaced apart from each other and disposed opposite to each other. The first support member is detachably connected to the bottom of the first side of the pair of connecting members. The second support member is detachably connected to the bottom of the second side of the pair of connecting members. The first side faces the second side. The first positioning member is detachably connected to the top of the first side of the pair of connecting members. The second positioning member is detachably connected to the top of the second side of the pair of connecting members. The pair of connecting members, the first support member, the first positioning member, the second support member, and the second positioning member enclose a receiving space; and A battery pack, the battery pack is accommodated in the receiving space.

2. The energy storage device according to claim 1, characterized in that, The energy storage device includes more than two of the fixed frames. The more than two fixed frames are arranged along a first direction. The second support members of every two adjacent fixed frames face each other and are detachably connected to two pairs of the connecting members. The second positioning members of every two adjacent fixed frames face each other and are detachably connected to two pairs of the connecting members.

3. The energy storage device according to claim 2, characterized in that, The first support member includes a first support bar and a first connecting bar connected to one side of the first support bar. The second support member includes a second support bar and a second connecting bar connected to one side of the second support bar. The first support bar and the second support bar respectively support the bottom surface of the battery pack. The first connecting bar and the second connecting bar are respectively detachably connected to the pair of connecting members.

4. The energy storage device according to claim 3, characterized in that, A plurality of first weight reduction notches are formed in the first support bar. The plurality of first weight reduction notches are arranged at intervals in a second direction. A plurality of second weight reduction notches are formed in the second support bar. The plurality of second weight reduction notches are arranged at intervals in the second direction. The second direction is parallel to the length direction of the first support bar. The first direction is perpendicular to the second direction.

5. The energy storage device according to claim 3, wherein At least one end of the opposite ends of the first connecting bar is provided with a first adjustment hole. The length direction of the first adjustment hole is parallel to the length direction of the first connecting bar. At least one end of the opposite ends of the second connecting bar is provided with a second adjustment hole. The length direction of the second adjustment hole is parallel to the length direction of the second connecting bar.

6. The energy storage device according to claim 1 or 2, characterized in that, The first positioning member includes a first positioning bar and a third connecting bar connected to one side of the first positioning member. The first positioning bar is positioned on the top surface of the battery pack. The opposite ends of the third connecting bar are respectively detachably connected to the pair of connecting members. The second positioning member includes a second positioning bar. The opposite ends of the second positioning bar are respectively detachably connected to the pair of connecting members.

7. The energy storage device according to claim 6, characterized in that At least one end of the opposite ends of the third connecting bar is provided with a third adjustment hole. The length direction of the third adjustment hole is parallel to the length direction of the third connecting bar. At least one end of the opposite ends of the second positioning bar is provided with a fourth adjustment hole. The length direction of the fourth adjustment hole is parallel to the length direction of the second positioning bar.

8. A energy storage battery pack, characterized in that, The energy storage battery pack includes a shell, a battery management system and the energy storage device according to any one of claims 1 to 7, the battery management system and the energy storage device are accommodated in the inner cavity of the shell, and the battery management system is electrically connected to the battery pack of the energy storage device.

9. The energy storage battery pack according to claim 8, wherein, An isolating member is provided between the battery management system and the energy storage device, the isolating member is connected to a pair of connecting members of the energy storage device, and the battery management system is connected to a side of the isolating member away from the connecting members.

10. The energy storage battery pack according to claim 9, wherein A first buffer is sandwiched between the isolating member and the energy storage device, and a second buffer is arranged between the periphery of the energy storage device and the housing.

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