Battery module and energy storage device

Abstract

The utility model provides a battery module and an energy storage device. The battery module comprises a bracket, a plurality of battery cell units and a busbar, the support comprises two cover plates which are arranged at an interval up and down, a plurality of beam bodies which are separately and detachably connected between the two cover plates, and insulating plates which are separately and detachably connected between the same ends of the two outermost beam bodies, and a mounting cavity is defined by the two adjacent beam bodies, the two cover plates and the insulating plates; each mounting cavity is internally provided with a battery cell unit and an insulating layer arranged along the circumferential direction of the battery cell unit, the insulating plate is provided with a through hole for exposing an explosion-proof valve and a pole in each battery cell unit, and each busbar is respectively connected between the two poles arranged at the same end and is fixedly arranged relative to the battery cell unit through the pole. According to the battery module disclosed by the utility model, the battery module is favorably maintained and replaced, and a busbar bracket can be omitted, so that the production cost of the battery module is favorably reduced, and the assembly efficiency of the battery module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a battery module. At the same time, the utility model also relates to an energy storage device provided with the battery module. Background Art

[0002] With the promotion and application of power batteries, energy storage devices that can be used as backup power sources have also emerged. However, as an important component of energy storage devices, the performance of battery modules directly affects the energy storage devices. Traditionally, the end plates of battery modules in ultra-thin energy storage devices are mostly aluminum extrusions or aluminum die-castings, and the side plates are usually made of aluminum sheets. The end plates and side plates are welded and fixed to form a space for installing battery cells.

[0003] However, this type of battery module structure makes it difficult and costly to repair and replace the battery module, thus limiting the promotion and application of energy storage devices. In addition, the arrangement of the busbar bracket in the traditional battery module not only takes up a lot of space, but also the structural design of the busbar is unreasonable, which can easily block the explosion-proof valve, thus affecting the safety of the battery module. Utility Model Content

[0004] In view of this, the utility model aims to provide a battery module for easy maintenance and replacement.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A battery module, comprising a bracket, a plurality of battery cells and a busbar; the bracket comprises two cover plates arranged at intervals in an upper and lower manner, a plurality of beams respectively spaced and detachably connected between the two cover plates, and an insulating plate respectively detachably connected between the same ends of the two outermost beams, and an installation cavity is formed between the two adjacent beams, the two cover plates and the insulating plate;

[0007] The battery cell unit and the insulating layer arranged along the circumference of the battery cell unit are arranged in each of the installation cavities, and the insulating plate is provided with a through hole for exposing the explosion-proof valve and the pole in each of the battery cell units. Each of the busbars is respectively connected between the two poles arranged at the same end, and is fixed relative to the bracket through the pole.

[0008] Furthermore, the insulating layer includes a lower insulating sheet disposed on one of the cover plates, and an upper insulating sheet buckled on top of the lower insulating sheet, and the battery cell unit is located in a space enclosed between the upper insulating sheet and the lower insulating sheet.

[0009] Furthermore, the battery cell unit includes at least two battery cells stacked together along the thickness direction of the installation cavity, and an elastic body arranged between two adjacent battery cells, and the elastic body is connected to the two battery cells respectively.

[0010] Further, at least one of the cover plates is provided with a plurality of reinforcement protrusions protruding outwardly, and the reinforcement protrusions are arranged orthogonally to the beam body; and / or,

[0011] The insulating plate includes a plurality of insulating sub-plates connected to the beam body.

[0012] Further, at least one of the cover plates is provided with a plurality of first weight-reducing holes; and / or,

[0013] The interior of the beam body is hollow, and a plurality of second weight-reducing holes are arranged on the beam body.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The battery module described in the utility model can be detachably connected between the two cover bodies through the beam body and the insulating plate, which is convenient for maintenance and replacement of the battery module. The bus is fixed relative to the battery cell unit through the pole, so that the bus is directly installed on the battery cell, which can save the bus bracket, thereby improving the assembly efficiency of the battery module and reducing the production cost of the battery module.

[0016] In addition, the cooperation between the upper insulating sheet and the lower insulating sheet is conducive to improving the insulation effect between the battery cell unit and the inner wall of the installation cavity, and is also conducive to the arrangement of the battery cell unit in the installation cavity. An elastomer is arranged between two adjacent battery cells to absorb the expansion of the battery cell, and is also connected to the two battery cells respectively through the elastomer, which is conducive to improving the assembly convenience of the battery cell unit. The structural strength of the cover plate is improved by setting a reinforcing protrusion; the insulating plate includes multiple insulating sub-plates, which is conducive to improving the installation flexibility of the insulating plate. The weight-reducing holes are arranged on the cover plate and the beam body to reduce the weight of the bracket and reduce the production cost of the bracket.

[0017] In addition, another object of the utility model is to provide an energy storage device, comprising an upper shell and a lower shell that are snap-fitted together, wherein a module installation space and an electrical installation space are formed between the upper shell and the lower shell; and the battery module as described above is arranged in the installation space.

[0018] Furthermore, the lower shell is provided with connecting beams orthogonally arranged at the bottom of the plurality of beam bodies, and the bracket is detachably connected to the connecting beams by passing through a plurality of first connecting members of the bracket; and / or,

[0019] The upper shell is detachably connected to the beam body through a second connecting piece passing through the upper shell and the cover plate on the same side.

[0020] Furthermore, the connecting beam is provided with a plurality of protrusions protruding toward the bracket, and the protrusions support the bracket above the connecting beam.

[0021] Furthermore, a hanging plate with hanging holes is provided on the upper shell or the lower shell, and / or,

[0022] The lower shell body is provided with plug-in boxes located on both sides of the electrical installation space, and a cover body used for opening and closing an open side of the plug-in box. A high-voltage socket and a low-voltage socket are provided in the plug-in box.

[0023] Furthermore, a battery management unit and a display light electrically connected to the battery management unit are provided in the electrical installation space, and the battery management unit displays the power level of the battery module through the display light, and an exposure hole is provided on the upper shell or the lower shell for exposing the display light.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] The energy storage device of the utility model is advantageous for the arrangement and installation of battery modules and electrical components and for the maintenance of the energy storage device by forming a module installation space and an electrical installation space.

[0026] In addition, by arranging a connecting beam on the lower shell, the first connecting member is used to connect the lower shell and the bracket together; the second connecting member is used to facilitate the detachable connection of the upper shell and the bracket. The protrusion on the connecting beam is conducive to increasing the distance between the lower shell and the bracket, which can leave space for the expansion of the battery cell and help reduce the impact on the thickness of the product in the later stage of use.

[0027] In addition, by setting up a hanging plate, it is convenient to hang the energy storage device, which is convenient for the layout of the energy storage device; by setting up a plug box on both sides of the battery installation space, it is convenient to arrange the high-voltage socket and the low-voltage socket, and by setting up a cover, it is convenient to improve the overall aesthetics of the plug box. The battery management unit displays the power of the battery module through the display light, which is convenient for the visualization of the power. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic structural diagram of the battery module according to the first embodiment of the utility model at one viewing angle;

[0030] Figure 2This is a schematic structural diagram of the battery module according to the first embodiment of the utility model from another viewing angle;

[0031] Figure 3 This is a partial structural schematic diagram of a battery module according to Embodiment 1 of the present utility model;

[0032] Figure 4 This is a schematic diagram of a portion of the internal structure of the battery module according to the first embodiment of the present utility model;

[0033] Figure 5 This is a schematic structural diagram of the battery cell unit according to the first embodiment of the utility model;

[0034] Figure 6 A top view of the battery module according to the first embodiment of the present utility model;

[0035] Figure 7 for Figure 6 AA direction section view;

[0036] Figure 8 It is a structural schematic diagram of the energy storage device described in the second embodiment of the utility model at one viewing angle;

[0037] Fig. 9 This is a schematic structural diagram of the energy storage device described in Embodiment 2 of the present utility model from another viewing angle;

[0038] Fig.10 It is a partial structural schematic diagram of the energy storage device described in the second embodiment of the utility model;

[0039] Fig.11 This is a schematic structural diagram of the connecting beam and the battery module in a connected state according to the second embodiment of the present utility model;

[0040] Fig.12 This is a schematic diagram of the structure of the lower housing described in Embodiment 2 of the present utility model;

[0041] Fig.13 This is a structural schematic diagram of the plug box described in Embodiment 2 of the present utility model;

[0042] Fig.14 This is a schematic diagram of the structure of the display light according to the second embodiment of the utility model at one viewing angle;

[0043] Fig.15 This is a schematic diagram of the structure of the display light according to the second embodiment of the utility model from another viewing angle.

[0044] Fig.16 This is a schematic structural diagram of the display light and the fixing plate described in the second embodiment of the present utility model.

[0045] Description of reference numerals:

[0046] 1. Lower cover; 2. Upper cover; 3. Beam; 4. Insulation plate; 5. Insulation layer; 6. Cell unit; 7. Lower shell; 8. Upper shell; 9. Light board; 10. Battery management unit;

[0047] 101, first weight-reducing hole; 102, reinforcement protrusion; 103, second bolt; 104, wiring harness fixing hole; 105, lifting hole;

[0048] 201, first bolt;

[0049] 301, second weight reduction hole;

[0050] 401, bus;

[0051] 501, lower insulating sheet; 502, upper insulating sheet;

[0052] 601, battery cell; 6011, elastomer; 6012, pole; 602, explosion-proof valve;

[0053] 701, plug box; 7011, low voltage socket; 7012, high voltage socket; 7013, rubber plug; 702, cover; 703, connecting beam; 7031, bump; 704, screw;

[0054] 801, hanging plate; 802, hanging hole; 803, recessed portion; 804, supporting pad; 805, fourth bolt; 901, light guide plate; 902, connecting protrusion; 903, light strip; 904, fixing plate. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0056] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0058] Embodiment 1

[0059] This embodiment relates to a battery module, which comprises a bracket, a plurality of battery cell units 6 and a busbar 401. The bracket comprises two cover plates arranged at intervals in the upper and lower parts, a plurality of beams 3 respectively spaced and detachably connected between the two cover plates, and an insulating plate 4 respectively detachably connected between the same ends of the two outermost beams 2, and an installation cavity is formed between the two adjacent beams 3, the two cover plates and the insulating plate 4.

[0060] Among them, each installation cavity is provided with a battery cell unit 6 and an insulating layer 5 arranged along the circumference of the battery cell unit 6, and the insulating plate 4 is provided with a through hole for exposing the explosion-proof valve 602 and the pole 6012 in each battery cell unit 6, and each bus 401 is respectively connected between two poles 6012 arranged at the same end, and is fixed relative to the battery cell unit 6 through the pole 6012.

[0061] The battery module of this embodiment is detachably connected between the two cover bodies 702 through the beam body 3 and the insulating plate 4, which is convenient for maintenance and replacement of the battery module. The bus 401 is fixed relative to the battery cell unit 6 through the pole 6012, so that the bus 401 is directly installed on the battery cell 601, and the bus 401 bracket can be omitted, thereby improving the assembly efficiency of the battery module and reducing the production cost of the battery module.

[0062] Based on the above overall introduction, an exemplary structure of the battery module described in this embodiment is as follows: Figures 1 to 3 As shown in . Preferably, the two cover plates have the same structural form, which is conducive to the structural molding of the cover plates and the convenience of installation. Of course, in addition to the rectangular shape shown in the figure, the cover plate can also be square, and the specific specifications can be determined according to the use requirements. For the convenience of the following description, the cover plate arranged on the upper side of the two cover plates is called the upper cover plate 2, and the cover plate arranged on the lower side is called the lower cover plate 1.

[0063] The multiple beams 3 in this embodiment are arranged between the upper cover plate 2 and the lower cover plate 1 at intervals along the length direction of the cover plate, and each beam 3 is extended along the width direction of the cover plate. Two insulating plates 4 are respectively arranged on both sides of the upper cover plate 2 and the lower cover plate 1, and are connected to the ends of each beam 3, which is convenient for the arrangement and installation of the beam 3 and the insulating plates 4. In this way, the installation cavity is rectangular, which is convenient for installing and protecting the battery cell unit 6 composed of blade batteries. Of course, in the specific implementation, the specifications of the installation cavity are consistent with the specifications of the battery cell unit 6, which can ensure that the battery cell unit 6 can be installed in the installation cavity.

[0064] To achieve the connection between the cover plate and the beam body 3, as Figure 6 and Figure 7As shown in , a plurality of first rivet nuts are arranged at intervals along the length direction of each beam body 3 on the inner side of the top and bottom, and each cover plate is screwed together with the first bolts 201 passing through itself and the beam body 3 and the nuts, thereby connecting two cover plates and a plurality of beam bodies 3. Here, the connection method between the beam body 3 and the cover plate is simple and easy to operate, so that the bracket can be easily installed and disassembled.

[0065] As a preferred structural example, the insulating plate 4 includes a plurality of insulating sub-plates connected to the beam body 3, and the plurality of insulating sub-plates are spliced ​​to form a complete insulating plate 4. Figure 5 As shown in , the insulating plate 4 includes three insulating sub-plates, each of which is connected to the beam body 3 spanned by itself, which is conducive to improving the installation firmness of the insulating plate 4, and the provision of multiple insulating sub-plates is also conducive to improving the installation flexibility of the insulating plate 4.

[0066] In this embodiment, second rivet nuts are arranged at intervals along the height direction on the inner sides of both ends of the beam body 3, and the insulating sub-plate is connected to the plurality of beam bodies 3 by screwing the second bolts 103 passing through itself and the ends of the beam body 3 with the corresponding second rivet nuts. Here, the installation method of the insulating plate 4 is simple and easy to operate, which is conducive to further improving the convenience of installation and disassembly of the bracket. Of course, it is also feasible to set the insulating plate 4 as a whole instead of the split solution shown in the figure.

[0067] like Figure 5 As shown in , the battery cell unit 6 in this embodiment includes at least two battery cells 601 stacked together along the thickness direction of the installation cavity, and an elastic body 6011 disposed between two adjacent battery cells 601, and the elastic body 6011 is respectively connected to the two battery cells 601. The elastic body 6011 is disposed between two adjacent battery cells 601, which is conducive to absorbing the expansion of the battery cell 601, and is also respectively connected to the two battery cells 601 through the elastic body 6011, which is conducive to improving the assembly convenience of the battery cell unit 6.

[0068] Among them, poles 6012 are provided at both ends of multiple cells 601 in the same cell unit 6, and explosion-proof valves 602 are provided on multiple cells 601, and the explosion-proof valves 602 on two adjacent cells 601 are staggered and not located at the same end of the cell unit 6. This facilitates the busbar 401 to be connected between the two poles 6012, and the busbar 401 will not interfere with the explosion-proof valve 602, thereby affecting the use effect of each other. The shape and specification of the busbar 401 in this embodiment can be determined according to the layout requirements.

[0069] For example Figures 1 to 3As shown in , the busbar 401 is in the shape of a long strip, connected between two poles 6012 arranged adjacent to each other in the same layer. The busbar 401 may also be in a special shape, and connected between the poles 6012 located at the upper and lower sides of the end. The busbar 401 in this embodiment is directly fixed by the poles 6012, so that the structure of the busbar 401 bracket is omitted.

[0070] As a structural example of the battery cell unit 6, two battery cells 601 stacked up and down are arranged therein, and the elastic body 6011 is preferably foam in the prior art, and the two sides of the elastic body 6011 are respectively bonded and connected to the battery cells 601 on the same side through colloid, which is convenient for arrangement and implementation. In order to improve the performance of the battery cell unit 6, the outer periphery of each battery cell 601 is also wrapped with a blue film.

[0071] In this embodiment, the thickness of the foam should meet the requirement of absorbing the expansion of the battery cell 601. For example, when the foam is a polyurethane buffer foam, the thickness of the foam can be 2.5 mm to 3.5 mm. In specific implementation, the thickness of the foam can be 2.5 mm, 3 mm or 3.5 mm.

[0072] As a preferred embodiment, the insulating layer 5 includes a lower insulating sheet 501 disposed on one cover plate thereof, and an upper insulating sheet 502 buckled on the lower insulating sheet 501, and the battery cell unit 6 is located in a space enclosed between the upper insulating sheet 502 and the lower insulating sheet 501. The cooperation between the upper insulating sheet 502 and the lower insulating sheet 501 is conducive to improving the insulation effect between the battery cell unit 6 and the inner wall of the installation cavity, and is also conducive to the arrangement of the battery cell unit 6 in the installation cavity.

[0073] Specifically, if Figure 4 As shown in , the cross section of the lower insulating sheet 501 is in a "U" shape with the opening facing upward, and the cross section of the upper insulating sheet 502 is in a "I" shape. Among them, the bottom of the lower insulating sheet 501 is adapted to the bottom wall of the installation cavity, and the two sides are adapted to the beam body 3 respectively. After the lower insulating sheet 501 is fixed on the lower cover plate 1, the battery cell unit 6 can be placed in the lower insulating sheet 501, and then the upper insulating sheet 502 is bonded to the top of the battery cell unit 6, and cooperates with the lower insulating sheet 501 to form a complete insulating layer 5.

[0074] In addition, in order to improve the structural strength of the cover plate, multiple reinforcement protrusions 102 are provided on both cover plates, and the reinforcement protrusions 102 are arranged orthogonally to the beam body 3. Figure 1 and Figure 2As shown in , the reinforcing protrusions 102 are arranged in a plurality of intervals along the width direction of the cover plate, and each reinforcing protrusion 102 is extended along the length direction of the cover plate and is located between two rows of first weight-reducing holes 101. By orthogonally arranging the plurality of reinforcing protrusions 102 and the beam body 3, the cooperation between the two can better enhance the strength of the bracket structure, and the structure of the reinforcing protrusion 102 is simple and easy to process and form. Of course, it is also feasible to arrange the reinforcing protrusion 102 on only one of the cover plates.

[0075] To reduce the overall weight of the bracket, Figure 1 and Figure 2 As shown in , the upper cover plate 2 and the lower cover plate 1 are both provided with a plurality of rows of first weight-reducing structures spaced apart along the width direction thereof, and each row of the first weight-reducing structures includes a plurality of first weight-reducing holes 101 spaced apart along the length direction of the cover plate. The interior of the beam body 3 is hollow, and at least two rows of second weight-reducing structures spaced apart along the height direction are provided on the beam body 3, and the second weight-reducing structures include a plurality of second weight-reducing holes 301 spaced apart along the length direction of the beam body 3.

[0076] In this embodiment, the first weight-reducing hole 101 and the second weight-reducing hole 301 can be Figure 1 The oblong hole shape shown in the figure may also be in other structural forms. The coordinated arrangement of the first weight-reducing structure and the second weight-reducing structure here is conducive to reducing the weight of the bracket and is convenient for arrangement and implementation. It should be noted that the scheme of only arranging the weight-reducing structure on one of the cover plates or one of the beam bodies 3 is also feasible.

[0077] Further, to facilitate the arrangement of the wiring harness electrically connected to the battery cell 601, as Figure 1 As shown in , there are harness fixing holes 104 on both sides of each cover plate and on the insulating plate 4, and a harness fixing seat is installed on the harness fixing hole 104. The harness passes through the harness fixing seat, and the harness fixing seat is fixed on the beam body 3 or the upper cover plate 2 through the harness fixing hole 104, so as to improve the neatness of the harness. At the same time, in this embodiment, the arrangement direction of the harness is set on one side of the upper cover plate 2, which is conducive to avoiding the occurrence of fire problems caused by short circuit of the harness when the battery cell 601 is out of control.

[0078] In addition, to facilitate the hoisting of the entire battery module, a plurality of hoisting holes 105 arranged at intervals are provided at one end of the upper cover plate 2. External hoisting equipment can hoist the battery module through the hoisting holes 105 for transfer, thereby facilitating the assembly of the battery module.

[0079] When assembling the battery module in this embodiment, the following steps are performed: first, multiple beams 3 are respectively connected to the lower cover plate 1 by multiple first bolts 201, and the insulating plate 4 is connected to both ends of the beams 3, so as to form the above-mentioned installation cavity.

[0080] Next, two battery cells 601 are pre-stacked and foam is bonded between them. Then, the lower insulating sheet 501 is bonded to the lower cover plate 1, and the stacked battery cell unit 6 is placed in the space defined by the lower insulating sheet 501. Then, the upper insulating sheet 502 is bonded to the top of the battery cell unit 6, the upper cover plate 2 is placed on the upper insulating sheet 502, and the upper cover plate 2 and the plurality of beams 3 are connected together by the second bolts 103, and the assembly of the battery module is completed.

[0081] In addition, the cover plate in this embodiment can be made of hot-dip galvanized steel plate, such as SGCC, which is conducive to further reducing the cost and weight of the cover plate. Of course, during specific implementation, the material of the cover plate can also be determined according to the use requirements.

[0082] The battery module in this embodiment can define a space for installing the battery cell unit 6 by the cooperation of the cover plate, the beam body 3 and the insulating plate 4, which is convenient for processing and forming, and is conducive to reducing production costs. In this battery module, the cooperation of the first bolt 201 and the first rivet nut, and the cooperation of the second bolt 103 and the second rivet nut can facilitate the installation and removal of the bracket, thereby facilitating the maintenance and replacement of the battery cell unit 6, and is conducive to reducing maintenance costs. The busbar 401 is directly installed on the battery cell 601, eliminating the busbar 401 bracket and its installation process, thereby helping to reduce production costs.

[0083] Embodiment 2

[0084] The present embodiment relates to an energy storage device. Generally speaking, the energy storage device includes an upper shell 8 and a lower shell 7 that are snap-fitted together. A module installation space and an electrical installation space are formed between the upper shell 8 and the lower shell 7. The battery module described in the first embodiment is arranged in the installation space.

[0085] The energy storage device of this embodiment facilitates the arrangement and installation of battery modules and electrical components, and facilitates the maintenance of the energy storage device by forming a module installation space and an electrical installation space.

[0086] As an exemplary structure of an energy storage device, Figure 8 and Fig. 9 As shown in the figure, the energy storage device is an ultra-thin energy storage device, which is conducive to reducing the space occupied and facilitating the layout and implementation. The lower shell 7 is in the shape of a box with an opening at the top, and the upper shell 8 is arranged on the top of the lower shell 7 to close the opening. The electrical installation space in this embodiment is located at one end of the entire space, and the module installation space is located in the rest of the entire space.

[0087] Preferably, a hanging plate 801 having a hanging hole 802 is provided on the upper shell 8 or the lower shell 7 in this embodiment, so as to facilitate hanging the energy storage device on an external carrier. Figure 8As shown in , the hanging plate 801 is arranged at one end of the upper shell 8 having the electrical installation space, and has a hanging part extending out of the end of the upper shell 8, and the above-mentioned hanging hole 802 is arranged on the hanging part.

[0088] In order to improve the stability of the energy storage device in the hoisting state, multiple grooves arranged at intervals are provided at both ends of the upper shell 8, and support pads 804 are provided in the grooves, and the upper shell 8 abuts against the surface of the external carrier through the support pads 804. In addition, multiple long holes can be provided on the hanging plate 801 to further reduce the weight of the entire energy storage device, thereby reducing the production cost.

[0089] Furthermore, in this embodiment, the lower shell 7 is provided with connecting beams 703 arranged orthogonally at the bottom of the plurality of beam bodies 3, and is detachably connected to the connecting beams 703 by passing through a plurality of first connecting members. Fig.11 and Fig.12 As shown in , the connecting beam 703 is located in the middle of the lower shell 7 in the width direction, and the middle of the connecting beam 703 is arched upward, so that a space for arranging multiple third rivet nuts is formed on the side of the connecting beam 703 facing the lower shell 7.

[0090] The first connecting member is a third bolt respectively arranged corresponding to each beam body 3. The third bolt passes through the upper cover plate 2, the beam body 3, the lower cover plate 1 and the connecting beam 703 and is screwed together with the third rivet nut, thereby fixing the bracket on the lower shell 7 and facilitating the installation and removal of the bracket on the lower shell 7.

[0091] As a preferred embodiment, Fig.12 As shown in , the connecting beam 703 is provided with a plurality of protrusions 7031 protruding toward the bracket, and the protrusions 7031 support the bracket above the connecting beam 703. The protrusions 7031 on the connecting beam 703 are conducive to increasing the distance between the lower housing 7 and the bracket, which can leave space for the expansion of the battery cell 601 and help reduce the impact on the thickness of the product in the later stage of use. Specifically, the protrusions 7031 are arranged one by one with the third rivet nut, and the protrusions 7031 are annular, so as to facilitate the connection between the third bolt and the third rivet nut on the connecting beam 703.

[0092] In this embodiment, the height of the bump 7031 can be 1 mm to 2 mm, for example, the height of the bump 7031 can be 1 mm, 1.5 mm or 2 mm, etc. When the height of the bump 7031 is 1 mm to 2 mm, it is beneficial to improve the expansion deformation of the battery cell 601 and reduce the impact on the thickness of the product in the later stage.

[0093] In this embodiment, the upper shell 8 is detachably connected to the beam body 3 by a second connecting member passing through the upper shell 8 and the cover plate on the same side. Specifically, the upper shell 8 is screwed to the beam body 3. The second connecting member is a screw 704, which passes through the upper shell 8, the upper cover plate 2 and the fourth rivet nut on the inner side of the beam body 3 and is screwed to each other. Figure 8 In order to ensure the planar effect of the upper shell 8, a plurality of recessed parts 803 recessed inward are provided on the upper shell 8, and the plurality of recessed parts 803 are extended along the length direction of the upper shell 8 and arranged at intervals in the width direction of the upper shell 8. The screws 704 are arranged through the recessed parts 803 and connected to the corresponding beam body 3, so that the heads of the screws 704 are accommodated in the recessed parts 803, thereby ensuring the planar effect of the upper shell 8 when in contact with the external carrier.

[0094] In addition, sealing gaskets are provided around the lower shell 7, and the upper shell 8 is screwed to the lower shell 7 by multiple fourth bolts 805 passing through its own edge, which is beneficial to the connection between the upper shell 8 and the lower shell 7, and makes the upper shell 8 and the lower shell 7 have a better sealing effect when connected.

[0095] like Fig.10 , Fig.12 and Fig.13 As shown in the figure, the lower housing 7 is provided with a plug box 701 located on both sides of the electrical installation space, and a cover 702 for opening and closing the plug box 701 with one side open, and the plug box 701 is provided with a high-voltage socket 7012 and a low-voltage socket 7011. By respectively arranging the plug boxes 701 on both sides of the battery installation space, it is convenient to arrange the high-voltage socket 7012 and the low-voltage socket 7011, and by arranging the cover 702, it is convenient to improve the overall aesthetics of the plug box 701.

[0096] In terms of specific structure, the cover 702 is pivotally arranged on one side of the plug box 701. To improve the effect of the cover in the closed state, a magnetic block is arranged on the other side of the plug box 701 relative to the side of the plug box 701 that is pivotally connected to the cover 702. The cover 702 can be magnetically adsorbed on the magnetic block, thereby ensuring the effect in the closed state and facilitating the opening and closing of the cover 702. To facilitate the wire harnesses respectively connected to the high-voltage socket 7012 and the low-voltage socket 7011 to extend out of the plug box 701, an installation port is arranged at one end of the plug box 701 that is arranged opposite to the bracket, as well as a rubber plug 7013 for sealing the installation port, and a through hole is arranged on the rubber plug 7013 for the corresponding wire harness to pass through, which is conducive to meeting the use requirements of the plug box 701.

[0097] Further, such as Figures 14 to 16As shown in FIG. 1 , a battery management unit 10 and a display light electrically connected to the battery management unit 10 are provided in the electrical installation space. The battery management unit 10 displays the power of the battery module through the display light, and an exposure hole for the display light to be exposed is provided on the lower housing 7. Here, the battery management unit 10 displays the power of the battery module through the display light, which is conducive to the visualization of the power.

[0098] In terms of detailed structure, the main body of the battery management unit 10 is in the shape of a plate, which is electrically connected to the battery module, so that the power information of the battery module can be obtained. The light board 9 of the display light is in the shape of a long strip, and a light guide plate 901 is provided on the light board 9. The light guide plate 901 is provided with a light strip 903 corresponding to the light-emitting body on the light board 9, so that the light-emitting body on the light board 9 can emit light better, and the light board 9 can be connected for protection.

[0099] Among them, a fixing plate 904 is provided on the inner side of the upper shell 8, and a plurality of connecting protrusions 902 are provided on the circumference of the light guide plate 901. The light guide plate 901 is fixed on the fixing plate 904 through the connecting protrusions 902, which facilitates the installation of the light guide plate 901 on the upper shell 8. In addition, in order to improve the connection effect of the light guide plate 901, a plurality of adhesive grooves are provided on the side of the light guide plate 901 facing the light board 9, and the light guide plate 901 is bonded to the light board 9 by adhesive strips filled in the adhesive grooves.

[0100] In this embodiment, the above-mentioned exposure hole corresponding to the light strip 903 is provided on the lower housing 7, and the exposure hole is in the shape of a long strip, and the light strip 903 on the light guide plate 901 is exposed through the exposure hole, thereby displaying the power of the battery module. For example, the power information is represented by the length of the light strip 903. The longer the length of the light strip 903 displayed through the exposure hole, the more power there is, and the shorter the length, the less power there is.

[0101] In this embodiment, in order to meet the IP65 waterproof grade and aesthetics, sealants are used to seal the locations inside the upper shell 8 and the lower shell 7 that are prone to water leakage.

[0102] When assembling the energy storage device in this embodiment, the electrical components are pre-installed in the lower housing 7 (where the wiring harness and copper busbar are temporarily insulated), sealant is applied to the light guide plate 901, and the bottom waterproof breathable valve is tightened. Then the battery module is hoisted into the lower housing 7 using tools, and then the wiring harness is connected; then the waterproof sealing strip is pasted on the lower housing 7, and the housing 8 is covered; finally, the bracket is connected to the upper housing 8 and the lower housing 7 using the third bolt and screw 704, and the upper housing 8 and the lower housing 7 are connected together by the fourth bolt 805.

[0103] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module, characterized in that: It includes a bracket, a plurality of battery cells and a plurality of bus bars; The bracket includes two cover plates spaced apart from each other, a plurality of beams spaced apart and detachably connected between the two cover plates, and an insulating plate detachably connected between the same ends of the two outermost beams, and an installation cavity is formed between the two adjacent beams, the two cover plates and the insulating plate; The battery cell unit and the insulating layer arranged along the circumference of the battery cell unit are arranged in each of the installation cavities, and the insulating plate is provided with a through hole for exposing the explosion-proof valve and the pole in each of the battery cell units. Each of the bus bars is respectively connected between the two poles arranged at the same end, and is fixed relative to the battery cell unit through the pole.

2. The battery module according to claim 1, characterized in that: The insulating layer comprises a lower insulating sheet arranged on one of the cover plates, and an upper insulating sheet buckled on the lower insulating sheet, and the battery cell unit is located in a space enclosed between the upper insulating sheet and the lower insulating sheet.

3. The battery module according to claim 1, characterized in that: The battery cell unit comprises at least two battery cells stacked together along the thickness direction of the installation cavity, and an elastic body arranged between two adjacent battery cells, wherein the elastic body is connected to the two battery cells respectively.

4. The battery module according to claim 1, characterized in that: At least one of the cover plates is provided with a plurality of reinforcement protrusions protruding outwardly, and the reinforcement protrusions are arranged orthogonally to the beam body; and / or, The insulating plate includes a plurality of insulating sub-plates connected to the beam body.

5. The battery module according to any one of claims 1 to 4, characterized in that: At least one of the cover plates is provided with a plurality of first weight-reducing holes; and / or, The interior of the beam body is hollow, and a plurality of second weight-reducing holes are arranged on the beam body.

6. An energy storage device, characterized in that: It comprises an upper shell and a lower shell which are connected by buckling, and a module installation space and an electrical installation space are formed between the upper shell and the lower shell; The battery module according to any one of claims 1 to 5 is arranged in the installation space.

7. The energy storage device according to claim 6, characterized in that: The lower shell is provided with a connecting beam arranged orthogonally to the plurality of beam bodies, and the bracket is detachably connected to the connecting beam by passing through a plurality of first connecting members of the bracket; and / or, The upper shell is detachably connected to the beam body through a second connecting piece passing through the upper shell and the cover plate on the same side.

8. The energy storage device according to claim 7, characterized in that: The connecting beam is provided with a plurality of protruding blocks protruding toward the bracket, and the protruding blocks support the bracket above the connecting beam.

9. The energy storage device according to claim 6, characterized in that: The upper shell or the lower shell is provided with a hanging plate having a hanging hole; and / or, The lower shell body is provided with plug-in boxes located on both sides of the electrical installation space, and a cover body used for opening and closing an open side of the plug-in box. A high-voltage socket and a low-voltage socket are provided in the plug-in box.

10. The energy storage device according to any one of claims 6 to 9, characterized in that: A battery management unit and a display light electrically connected to the battery management unit are provided in the electrical installation space. The battery management unit displays the power level of the battery module through the display light, and an exposure hole for exposing the display light is provided on the upper shell or the lower shell.

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