Energy storage battery pack and electric device

Abstract

The utility model relates to the technical field of energy storage batteries, in particular to an energy storage battery pack and an electric device. The energy storage battery pack comprises a box body shell and a battery module arranged in the box body shell, the battery module comprises a plurality of battery cells, the plurality of battery cells are sequentially arranged in a first direction in a manner that large surfaces are opposite, the box body shell comprises a first side plate and a second side plate which are oppositely arranged in the first direction, and the battery module is clamped by the first side plate and the second side plate; pre-tightening force in the first direction is provided for the battery module; therefore, the first side plate and the second side plate are used for replacing the traditional structure of a steel belt and an end plate, so that the battery module can be stably and enduringly extruded along the first direction, the expansion of the battery core is inhibited, and the cycle life of the battery core is prolonged; meanwhile, due to the fact that a steel belt and an end plate are omitted, the number of parts and assembling procedures are reduced, the energy storage battery pack is more convenient to assemble and lower in cost, the weight of the energy storage battery pack is reduced, and the energy density is improved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage batteries, and more particularly to an energy storage battery pack and an electrical device. Background Art

[0002] With the continuous development of society, energy storage battery packs are increasingly widely used in fields such as communication base station energy storage, industrial and commercial energy storage, and household energy storage. Traditional energy storage battery packs usually use the form of steel belts + end plates to fix battery modules, but this fixing method is not only inconvenient to install, but also occupies a large space and a large weight in the battery pack, and the cost is also high. Summary of the Utility Model

[0003] The purpose of the present utility model is to provide an energy storage battery pack and an electrical device, so as to simplify the installation method of battery modules to a certain extent, improve production efficiency, and reduce costs.

[0004] The present utility model provides an energy storage battery pack, including a box body shell and a battery module;

[0005] The battery module is placed inside the box body shell, and the battery module includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence along a first direction;

[0006] The box body shell includes a first side plate and a second side plate, the first side plate and the second side plate are located on opposite sides of the box body shell in the first direction, and the first side plate and the second side plate clamp the battery module.

[0007] Further, the box body shell further includes a back plate, the back plate is located on one side of the box body in a second direction, and the second direction is perpendicular to the first direction;

[0008] A fixing plate is provided inside the box body shell, the fixing plate is disposed opposite to the back plate in the second direction, and the fixing plate and the back plate clamp the battery module.

[0009] Further, the energy storage battery pack further includes an elastic pad;

[0010] The elastic pad is provided on one side of each of the first side plate and the second side plate facing the battery module;

[0011] And / or, the elastic pad is provided on one side of each of the back plate and the fixing plate facing the battery module.

[0012] Further, the box body shell further includes a panel, the panel and the back plate are located on opposite sides of the box body shell in the second direction;

[0013] The panel is spaced apart from the fixing plate by a predetermined distance along the second direction, and a power switch, a positive output port, a negative output port, a signal communication interface, a ventilation valve and a handle are installed on the panel.

[0014] Further, the box body shell further includes a bottom plate and a top plate, the bottom plate and the top plate are located on opposite sides of the box body shell in the third direction, and the third direction is perpendicular to the first direction and the second direction;

[0015] Any two adjacent ones of the first side plate, the second side plate, the panel, the back plate, the bottom plate and the bottom plate are firmly connected, one end of the fixing plate is firmly connected to the first side plate, and the other end of the fixing plate is firmly connected to the second side plate.

[0016] Further, the energy storage battery pack further includes a battery cell support, and an aluminum busbar, an NTC acquisition module and a voltage acquisition module are arranged on the battery cell support;

[0017] The battery cell support is arranged inside the box body shell, and the battery cell support is located on the side of the battery module facing the top plate;

[0018] First convex portions are arranged on one side of the battery cell support in the first direction and one side in the second direction, so as to be in limiting contact with the side edges of the battery module through the first convex portions.

[0019] Further, first insulating sheets are arranged on the sides of the first side plate, the second side plate, the back plate, the fixing plate and the bottom plate facing the battery module.

[0020] Further, a second insulating sheet is arranged on the side of the battery cell support facing the top plate;

[0021] Second convex portions are arranged on the battery cell support, and positioning holes are arranged on the second insulating sheet for the second convex portions to pass through.

[0022] Further, the thickness of the elastic pad is h, and 1 mm ≤ h ≤ 5 mm.

[0023] Further, the distance between the panel and the fixing plate is d, and 50 mm ≤ d ≤ 100 mm.

[0024] Further, the number of the battery modules is multiple, and the multiple battery modules are arranged in sequence along the second direction.

[0025] The present utility model further provides an electrical device, including the energy storage battery pack according to any one of the above.

[0026] Compared with the prior art, the beneficial effects of the present utility model are:

[0027] The energy storage battery pack provided by the present utility model includes a box body housing and a battery module. The battery module is disposed inside the box body housing. The box body housing includes a first side plate and a second side plate, and the first side plate and the second side plate are located on opposite sides of the box body housing in a first direction. The battery module includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence along the first direction, and the large surfaces of two adjacent battery cells face each other. For the battery module installed inside the box body housing, the battery module is located between the first side plate and the second side plate, and the first side plate and the second side plate respectively press against the battery module with a predetermined pressure to clamp the battery module and provide a pre-tightening force for the battery module along the first direction. Therefore, the first side plate and the second side plate not only serve as a part of the box body housing, but also replace the traditional structure of a steel belt and an end plate to pre-press the battery module, so that the battery module can be stably and continuously extruded along the first direction to inhibit the expansion of the battery cells during cyclic charge and discharge and increase the cycle life of the battery cells. At the same time, since the steel belt and the end plate are omitted, the number of parts and the assembly process are reduced, making the assembly of the energy storage battery pack more convenient and the cost lower. At the same time, the weight of the energy storage battery pack is also reduced to a certain extent, and the energy density of the energy storage battery pack is improved.

[0028] The present utility model also provides an electrical device including the above-mentioned energy storage battery pack, so the electrical device also has the beneficial effects of the energy storage battery pack. Description of the Drawings

[0029] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings 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.

[0030] Figure 1 It is a split schematic diagram of the energy storage battery pack provided by the embodiment of the present utility model;

[0031] Figure 2 It is an overall assembly schematic diagram of the energy storage battery pack provided by the embodiment of the present utility model;

[0032] Figure 3 It is a schematic diagram of the battery module being clamped and fixed around.

[0033] Reference Numerals:

[0034] 1 - First side plate, 2 - Second side plate, 3 - Back plate, 4 - Fixed plate, 5 - Panel, 6 - Bottom plate, 7 - Top plate, 8 - First insulating sheet, 9 - Elastic pad, 10 - Battery module, 11 - Battery cell bracket, 12 - Second insulating sheet;

[0035] a - The first direction, b - The second direction, c - The third direction. Detailed implementation mode

[0036] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments.

[0037] The components of the embodiments of the present utility model usually described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0038] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0039] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" 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 or an electrical 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 utility model can be understood according to specific situations.

[0041] Next, refer to Figures 1 to 3 Describe the energy storage battery pack and the electrical device according to some embodiments of the present application.

[0042] The present application provides an energy storage battery pack, as Figures 1 to 3 shown, the energy storage battery pack includes a box body shell and a battery module 10, and the battery module 10 is arranged inside the box body shell.

[0043] The box housing is square, having a first direction a, a second direction b, and a third direction c that are perpendicular to each other. The box housing includes a first side plate 1, a second side plate 2, a front panel 5, a back panel 3, a bottom plate 6, and a top plate 7. The first side plate 1 and the second side plate 2 are located on opposite sides of the box housing in the first direction a. The front panel 5 and the back panel 3 are located on opposite sides of the box housing in the second direction b. The bottom plate 6 and the back panel 3 are located on opposite sides of the box housing in the third direction c. Any two adjacent ones of the first side plate 1, the second side plate 2, the front panel 5, the back panel 3, the bottom plate 6, and the top plate 7 are fastened together by fasteners to assemble a box housing with a stable structure for encapsulating the battery module 10, protecting the battery module 10, and enabling the protection level to reach IP20.

[0044] In this embodiment, the battery module 10 includes a plurality of battery cells. The battery cells are cuboid-shaped, and the two surfaces with the largest area of the battery cells are the large surfaces of the battery cells. The plurality of battery cells are arranged in sequence along the first direction a, and the large surfaces of two adjacent battery cells are arranged facing each other. For the battery module 10 installed in the box housing, the battery module 10 is located between the first side plate 1 and the second side plate 2, and the first side plate 1 and the second side plate 2 are respectively pressed against the battery module 10 with a predetermined pressure to clamp the battery module 10 and provide a pre-tightening force along the first direction a to the battery module 10. Therefore, the first side plate 1 and the second side plate 2 not only serve as part of the box housing but also replace the traditional structure of steel belts and end plates to pre-press the battery module 10, enabling the battery module 10 to be stably and continuously extruded along the first direction a to inhibit the expansion of the battery cells during cyclic charge and discharge and increase the cycle life of the battery cells. At the same time, since the steel belts and end plates are omitted, the number of parts and the assembly process are reduced, making the assembly of the energy storage battery pack more convenient and the cost lower. At the same time, the weight of the energy storage battery pack is also reduced to a certain extent, and the energy density of the energy storage battery pack is increased.

[0045] In this embodiment, preferably, under the action of the first side plate 1 and the second side plate 2, the extrusion force along the first direction a received by the battery module 10 is 200 kgf to 600 kgf.

[0046] In an embodiment of the present application, preferably, as Figure 1 and Figure 3 shown, a fixing plate 4 is further provided in the box housing. The fixing plate 4 is arranged facing the back panel 3 in the second direction b and is spaced between the front panel 5 and the back panel 3. One side of the fixing plate 4 in the first direction a is fastened to the first side plate 1, and the other side of the fixing plate 4 in the first direction a is fastened adjacent to the second side plate 2, thereby forming an accommodation space between the fixing plate 4, the back panel 3, the first side plate 1, and the second side plate 2.

[0047] The battery module 10 is assembled within the accommodation space. While the battery module 10 is clamped by the first side plate 1 and the second side plate 2, it is also clamped by the fixing plate 4 and the back plate 3, so that the battery module 10 is also subjected to a pre-tightening force along the second direction b, that is, all around the battery module 10 is stressed, to stably install the battery module 10 within the box housing, prevent the battery module 10 from falling due to incorrect user operations, and at the same time enable the energy storage battery pack to meet the UN38.3 vibration test.

[0048] In this embodiment, preferably, as Figure 1 shown, for the four side plates that clamp the battery module 10, namely the first side plate 1, the second side plate 2, the back plate 3 and the fixing plate 4, elastic pads 9 are provided on the sides of the four side plates facing the battery module 10, such as silicone pads; so that the four side plates respectively press against the battery module 10 through their respective elastic pads 9; preferably, the thickness of the elastic pad is h, and 1 mm ≤ h ≤ 5 mm. Thus, through the elastic pads 9, a buffering effect is achieved, avoiding hard contact between these four side plates and the battery module 10 and damaging the battery cells; at the same time, it can also absorb the machining dimensional tolerances and assembly dimensional tolerances of the battery module 10 and the box housing.

[0049] Preferably, the elastic pads 9 on the first side plate 1 and the second side plate 2 are respectively multiple and arranged at intervals along the second direction b, and the elastic pads 9 on the back plate 3 and the fixing plate 4 are respectively multiple and arranged at intervals along the first direction a.

[0050] In this embodiment, as described below, first insulating sheets 8 are provided on the sides of these four side plates facing the battery module 10, and the elastic pads 9 are specifically installed on, for example, adhered to the first insulating sheets 8 of the corresponding side plates.

[0051] In this embodiment, preferably, as Figure 1 and Figure 3 shown, the energy storage battery pack further includes a battery cell support 11. Aluminum bars for realizing series or parallel connection of battery cells are provided on the battery cell support 11, and at the same time, an NTC acquisition module and a voltage acquisition module are also provided. First protrusions are provided on one side of the battery cell support 11 in the first direction a and one side in the second direction b. When the battery cell support 11 is placed on the battery module 10, the battery cell support 11 can be in limit abutment with the side of the battery module 10 through the two first protrusions, so as to limit the installation position of the battery cell support 11 on the battery module 10.

[0052] In this embodiment, preferably, a second insulating sheet 12 is provided on the side of the battery cell support 11 facing the top plate 7 to insulate the aluminum bars on the battery cell support 11.

[0053] Preferably, the second insulating sheet 12 is mounted on the battery cell bracket 11 by bonding. At the same time, the battery cell bracket 11 is provided with second protruding portions, and the second insulating sheet 12 is provided with positioning holes. The second protruding portions can pass through the positioning holes, so that the installation position of the second insulating sheet 12 on the battery cell bracket 11 is limited by the cooperation of the second protruding portions and the positioning holes. Further, a plurality of the second protruding portions are arranged at intervals, and a plurality of the positioning holes are also arranged at intervals, and the plurality of second protruding portions pass through the plurality of positioning holes in a one-to-one correspondence.

[0054] In this embodiment, preferably, a first insulating sheet 8 is provided on one side of the first side plate 1, the second side plate 2, the back plate 3, the fixing plate 4, and the bottom plate 6 facing the battery module 10, for example, by bonding. Thus, insulation between the battery module 10 and the box body shell is achieved under the action of the second insulating sheet 12 and the plurality of first insulating sheets 8.

[0055] In this embodiment, preferably, the number of the battery modules 10 is plural, and the plural battery modules 10 are arranged in sequence along the second direction b. The plural battery modules 10 can be pre-pressed by the first side plate 1 and the second side plate 2 at the same time. Compared with the fixing method in which each battery module 10 needs to be separately configured with a steel belt and an end plate, the assembly convenience of the energy storage battery pack can be effectively improved, the production efficiency can be increased, and the product cost can be reduced.

[0056] In an embodiment of the present application, preferably, as Figure 1 and Figure 2 shown, the power switch, the positive output port, the negative output port, the signal communication interface, and the ventilation of the energy storage battery pack are all arranged on the panel 5 of the box body shell.

[0057] At the same time, a handle is further arranged on the panel 5 to facilitate carrying by holding the handle, or using the handle as a lifting lug for hoisting.

[0058] In this embodiment, preferably, the distance between the panel 5 and the fixing plate 4 is d, and 50 mm ≤ d ≤ 100 mm, so that the distance between the panel 5 and the fixing plate 4 can meet the installation of the components on the panel 5, and at the same time, the size of the box body shell in the second direction b can be effectively controlled.

[0059] The present application further provides an electrical device including the energy storage battery pack of any one of the above embodiments.

[0060] In this embodiment, the electrical device includes the energy storage battery pack, so the electrical device has all the beneficial effects of the energy storage battery pack, which will not be elaborated herein one by one.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A energy storage battery pack, characterized in that, It includes a box housing and a battery module; The battery module is placed inside the box housing, and the battery module includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence along a first direction; The box housing includes a first side plate and a second side plate, the first side plate and the second side plate are located on opposite sides of the box housing in the first direction, and the first side plate and the second side plate clamp the battery module.

2. The energy storage battery pack according to claim 1, wherein, The box housing further includes a back plate, the back plate is located on one side of the box in a second direction, and the second direction is perpendicular to the first direction; A fixing plate is provided inside the box housing, the fixing plate is disposed opposite to the back plate in the second direction, and the fixing plate and the back plate clamp the battery module.

3. The energy storage battery pack according to claim 2, wherein It further includes an elastic pad; The elastic pad is provided on one side of each of the first side plate and the second side plate facing the battery module; And / or, the elastic pad is provided on one side of each of the back plate and the fixing plate facing the battery module.

4. The energy storage battery pack according to claim 2, wherein, The box housing further includes a panel, the panel and the back plate are located on opposite sides of the box housing in the second direction, and the fixing plate is disposed at intervals between the panel and the back plate; A power switch, a positive output port, a negative output port, a signal communication interface, a breather valve and a handle are installed on the panel.

5. The energy storage battery pack according to claim 4, wherein, The box housing further includes a bottom plate and a top plate, the bottom plate and the top plate are located on opposite sides of the box housing in a third direction, and the third direction is perpendicular to the first direction and the second direction; Any two adjacent ones of the first side plate, the second side plate, the panel, the back plate, the bottom plate and the bottom plate are firmly connected, one end of the fixing plate is firmly connected to the first side plate, and the other end of the fixing plate is firmly connected to the second side plate; And / or, the energy storage battery pack further includes a battery cell bracket, and an aluminum busbar, an NTC acquisition module and a voltage acquisition module are provided on the battery cell bracket; The battery cell bracket is disposed inside the box housing, and the battery cell bracket is located on one side of the battery module facing the top plate; First protrusions are provided on one side of the battery cell bracket in the first direction and one side in the second direction, so as to be in limiting contact with the side of the battery module through the first protrusions.

6. The energy storage battery pack according to claim 5, characterized in that, First insulating sheets are provided on one side of each of the first side plate, the second side plate, the back plate, the fixing plate and the bottom plate facing the battery module; And / or, a second insulating sheet is provided on one side of the battery cell bracket facing the top plate; Second protrusions are provided on the battery cell bracket, and positioning holes are provided on the second insulating sheet for the second protrusions to pass through.

7. The energy storage battery pack according to claim 3, wherein, The thickness of the elastic pad is h, and 1mm ≤ h ≤ 5mm.

8. The energy storage battery pack according to claim 4, wherein The distance between the panel and the fixing plate is d, and 50mm ≤ d ≤ 100mm.

9. The energy storage battery pack according to claim 2, wherein The number of the battery modules is multiple, and the multiple battery modules are arranged in sequence along the second direction.

10. An electrical device, characterized in that, It includes the energy storage battery pack according to any one of claims 1 to 9.

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