Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer group and a glue blocking structure, the box body comprises a bottom wall, the battery monomer group is arranged in the box body, the bottom wall bears the battery monomer group, and the battery monomer group comprises a plurality of stacked battery monomers; the glue blocking structure comprises a first glue blocking piece, and the first glue blocking piece is arranged between the battery monomer group and the bottom wall; the first glue blocking piece comprises a plurality of first glue blocking strips which are transversely distributed at intervals and a plurality of second glue blocking strips which are longitudinally distributed at intervals, and the plurality of first glue blocking strips and the plurality of second glue blocking strips are mutually connected to form a plurality of hollow areas; on the same projection plane perpendicular to the thickness direction of the bottom wall, the orthographic projection of the battery monomer falls on the orthographic projection of the first blocking adhesive tape and the orthographic projection of the second blocking adhesive tape, the orthographic projection of each battery monomer covers one hollow area, and the battery monomer is bonded with the first blocking adhesive tape and the second blocking adhesive tape. According to the technical scheme provided by the invention, the reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] In battery technology, an insulation pad is usually arranged between the large surfaces of two adjacent battery cells in a CTP module. The insulation pad bonds the two adjacent battery cells into a group to prevent the structural adhesive at the bottom of the box from overflowing to the large surfaces of the battery cells. However, the large number of insulation pads results in problems of complex structure and high cost of the battery cell group. After the insulation pads are removed from the battery cell group, the structure of the battery cell group is simplified. However, due to the gap between the large surfaces of two adjacent battery cells, the structural adhesive easily overflows into the gap between the battery cells, affecting the reliability of the battery device. Summary of the Utility Model

[0004] The present application provides a battery device and an electrical device, which can improve the reliability of the battery device.

[0005] The present application is implemented by the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery device. The battery device includes a box body, a battery cell group, and a glue-blocking structure. The box body includes a bottom wall and two first side walls oppositely arranged in a first direction. The battery cell group is arranged in the box body, and the bottom wall bears the battery cell group. The battery cell group includes a plurality of battery cells distributed in a stacked manner. The glue-blocking structure includes a first glue-blocking member and a second glue-blocking member. The first glue-blocking member is arranged between the battery cell group and the bottom wall. The second glue-blocking member is arranged on opposite sides of the first glue-blocking member in the first direction and is connected to the first glue-blocking member. The second glue-blocking member is located between the battery cell group and the first side wall. The first direction is perpendicular to the thickness direction of the first glue-blocking member. Among them, the first glue-blocking member includes a plurality of first glue-blocking strips spaced transversely and a plurality of second glue-blocking strips spaced longitudinally. The plurality of first glue-blocking strips and the plurality of second glue-blocking strips are connected to each other to form a plurality of hollow areas. On the same projection plane perpendicular to the thickness direction of the bottom wall, the orthographic projection of the battery cell falls on the orthographic projections of the first glue-blocking strip and the second glue-blocking strip. The orthographic projection of each battery cell covers a hollow area, and an adhesive layer is arranged in the hollow area. The battery cell is bonded to the bottom wall through the adhesive layer. The battery cell is bonded to the first glue-blocking strip and the second glue-blocking strip. One side of two adjacent battery cells facing each other is arranged on the same first glue-blocking strip or second glue-blocking strip.

[0007] In the technical solution of the embodiment of the present application, the first glue-blocking member is composed of a plurality of first glue-blocking strips spaced horizontally and a plurality of second glue-blocking strips spaced vertically to form a grid structure. The orthographic projections of the respective battery cells in the battery cell group fall on the corresponding first glue-blocking strips and second glue-blocking strips. The orthographic projection of each battery cell covers a hollow area. The opposite sides of two adjacent battery cells are both arranged on the same first glue-blocking strip or second glue-blocking strip. Each battery cell is spaced apart on the first glue-blocking member to close each hollow area on the first glue-blocking member. On the one hand, the battery cell is adhesively fixed to the first glue-blocking strip and the second glue-blocking strip. The first glue-blocking member can carry and position the battery cell, enabling the battery cell to be stably adhesively fixed to the first glue-blocking member, realizing the gap grouping of multiple battery cells in the battery cell group, which is beneficial to the transportation of the battery cell group and the stability of the battery cell group during transportation. On the other hand, the corresponding part of the battery cell and the hollow area can be adhesively bonded to the glue layer on the bottom wall of the box body. Since the first glue-blocking strip and the second glue-blocking strip are hermetically adhesively bonded to the bottom periphery of the battery cell, the first glue-blocking strip and the second glue-blocking strip seal the circumference of the battery cell, which can not only prevent the series connection of the condensed water on the bottom surfaces of two adjacent battery cells, reducing the risk of the condensed water gathering at the bottom of the battery cell, but also block the glue layer on the bottom wall of the box body, so that the glue on the bottom wall (such as structural glue) cannot overflow from the gap between the battery cell and the first glue-blocking strip and the second glue-blocking strip to the large surface area of the battery cell, thereby reducing the risk of local lithium plating and voltage drop caused by the glue on the bottom wall overflowing from the gap between the battery cell and the first glue-blocking member to the large surface area of the battery cell and then hardening to squeeze the battery cell, improving the reliability of the battery device. By providing second glue-blocking members on both sides of the first glue-blocking member in the first direction, the second glue-blocking members are located between the battery cell group and the first side wall. Even if some of the structural glue on the bottom wall overflows to both sides of the battery cell group in the first direction, the second glue-blocking members are provided on both sides of the battery cell group in the first direction. The second glue-blocking members can block the structural glue overflowing from the bottom wall, reducing the risk of the structural glue overflowing from the side of the battery cell group to the large surface of the battery cell, and having a better blocking effect on the structural glue.

[0008] According to some embodiments of the present application, the battery cell has a first surface facing the first glue-blocking member. The first surface includes a first area and a second area. Along the thickness direction of the bottom wall, the first area overlaps with the hollow area, and the second area does not overlap with the hollow area. The second area is located on the periphery of the first area. The battery cell is adhesively bonded to the glue layer through the first area, and the battery cell is adhesively bonded to the first glue-blocking strip and the second glue-blocking strip through the second area.

[0009] In the above solution, the first region of the battery cell can be bonded to the adhesive layer on the bottom wall of the box body through the hollowed-out region, completing the bonding and fixing of each battery cell in the battery cell group to the bottom wall of the box body. The second region is located on the periphery of the first region. The battery cell contacts the first glue strip and the second glue strip through the second region, and is bonded and fixed to the first glue strip and the second glue strip, completing the bonding and fixing of each battery cell in the battery cell group to the first glue strip, and realizing the gap grouping of multiple battery cells in the battery cell group on the first glue member.

[0010] According to some embodiments of the present application, the first glue member includes a first base layer and a first adhesive paper. The first base layer is bonded to the adhesive layer of the bottom wall, and the first adhesive paper is disposed on the side of the first base layer facing the battery cell. The first glue member is bonded to each battery cell through the first adhesive paper.

[0011] In the above solution, by providing the first adhesive paper on the first base layer, the area where the battery cell contacts the first glue strip and the second glue strip can be bonded and fixed to the first glue member through the first adhesive paper, completing the bonding and positioning of multiple battery cells, and realizing the gap grouping of multiple battery cells in the battery cell group.

[0012] According to some embodiments of the present application, the battery cell group includes a plurality of first battery cells located at both ends in the first direction. The second glue member is used for bonding to the side surface corresponding to the first battery cell, and the first direction is perpendicular to the stacking direction of the battery cells.

[0013] In the above solution, by bonding the second glue member to the side surface of the first battery cell in the battery cell group, the second glue member has better adhesion to the side surface of the battery cell group in the first direction. There is less likely to be a gap between the second glue member and the first battery cell, and the sealing performance is better. Further, it plays a role in blocking the structural glue on the bottom wall, reducing the risk of the structural glue overflowing from the gap between the second glue member and the first battery cell to the large surface of the battery cell.

[0014] According to some embodiments of the present application, along the first direction, the second glue member includes a second base layer and a second adhesive paper. The second adhesive paper is disposed on the side of the second base layer facing the first battery cell. The second glue member is bonded to a plurality of first battery cells through the second adhesive paper.

[0015] In the above solution, by providing the second adhesive paper on the second base layer, the second adhesive paper can realize the bonding and fixing of the second glue member to the corresponding first battery cell, realizing the bonding and fixing of the second glue member to the battery cell group. The second glue member can play a role in blocking the structural glue overflowing from both sides of the bottom wall in the first direction.

[0016] According to some embodiments of the present application, a plurality of battery cells are arranged in a matrix in a first direction and a second direction. A plurality of first battery cells located at the same end in the first direction are spaced apart in the second direction. Along the second direction, there is a first gap between two adjacent first battery cells, and the second adhesive tape covers at least the first gap. The second direction is perpendicular to the first direction and perpendicular to the surface of the battery cell with the largest area.

[0017] In the above solution, by covering the second adhesive tape in the area corresponding to the first gap between two adjacent battery cells on the second base layer, even if the structural adhesive on the bottom wall overflows to the side of the second glue-blocking member facing the battery cell group, the second adhesive tape can seal and bond the first gap area between the two first battery cells and the second glue-blocking member, blocking the gap area between two adjacent first battery cells and the second glue-blocking member, and preventing the structural adhesive from overflowing from the first gap between two adjacent battery cells into the large surface area of the battery cell. On the premise of reducing the risk of the structural adhesive overflowing to the large surface of the battery cell, the amount of adhesive used for the second adhesive tape on the second glue-blocking member can be reduced, saving costs.

[0018] According to some embodiments of the present application, the second glue-blocking member and the first glue-blocking member are integrally formed.

[0019] In the above solution, the first glue-blocking member and the second glue-blocking member are integrally formed, and the second glue-blocking member and the second glue-blocking member do not require secondary assembly. The structure is simple, and the structural stability of the glue-blocking structure is higher.

[0020] According to some embodiments of the present application, a first connection crease is provided between the second glue-blocking member and the first glue-blocking member, and the first connection crease is used to enable the second glue-blocking member to flip relative to the first glue-blocking member.

[0021] In the above solution, the first glue-blocking member and the second glue-blocking member are connected by the first connection crease. After the battery cell group is bonded to the first glue-blocking member, during the process of the battery cell group being put into the box, when the second glue-blocking member contacts the first side wall of the box, the first side wall plays a certain blocking role on the second glue-blocking member, guiding the second glue-blocking member to fold upward along the first connection crease, so that the second glue-blocking member is pasted on the side of the battery cell group to complete the assembly, and there is no need to manually bond and fix the second glue-blocking member to the battery cell group, and the assembly is simpler.

[0022] According to some embodiments of the present application, the box body further includes second side walls oppositely arranged along the second direction; the glue blocking structure further includes a first insulating member, the first insulating member is arranged on opposite sides of the first glue blocking member in the second direction, and is located between the battery cell group and the second side wall; the battery cell group includes a plurality of second battery cells located at both ends in the second direction, the first insulating member is bonded to the second battery cells, and the first insulating member and the second glue blocking member are arranged around the outer periphery of the first glue blocking member; the second direction is perpendicular to the first direction, and the second direction is perpendicular to the surface of the battery cell with the largest area.

[0023] In the above solution, through the arrangement of the first insulating member, the first insulating member can play an insulating role between the large surface of the battery cell and the second side wall of the box body. At the same time, the first insulating member and the second glue blocking member are arranged around the outer peripheral side of the first glue blocking member, and the two cooperate to jointly block the structural adhesive overflowing from the peripheral side of the battery cell group, reducing the risk of the structural adhesive overflowing onto the large surface of the battery cell.

[0024] According to some embodiments of the present application, the first insulating member includes a first insulating layer and a third adhesive tape, the third adhesive tape is arranged on the side of the first insulating layer facing the second battery cell, and the first insulating member is bonded to the second battery cell through the third adhesive tape.

[0025] In the above solution, the first insulating layer can play an insulating role between the large surface of the battery cell and the second side wall of the box body. A third adhesive tape is arranged on the side of the first insulating layer facing the battery cell group, and the third adhesive tape can realize the bonding and fixing of the first insulating member and the corresponding second battery cell, thereby blocking the structural adhesive overflowing from the outside of the battery cell group.

[0026] According to some embodiments of the present application, a second connecting crease is provided between the first insulating member and the first glue blocking member, and the second connecting crease is used to enable the first insulating member to flip relative to the first glue blocking member.

[0027] In the above solution, the first insulating member and the first glue blocking member are connected by a second connecting crease. After the battery cell group is bonded to the first glue blocking member, during the process of the battery cell group being put into the box, under the blocking action of the second side wall of the box body, the first insulating member is guided to turn up relative to the first glue blocking member along the second connecting crease. After the first insulating member abuts against the side surface of the second battery cell and is pasted on the side surface of the second battery cell in the battery cell group, the assembly of the battery cell group into the box is completed, and it is not necessary to manually bond and fix the first insulating member and the battery cell group, and the assembly is simpler.

[0028] In a second aspect, an electrical device provided by an embodiment of the present application includes the battery device of any one of the foregoing embodiments, and the electrical device is used to provide electrical energy.

[0029] The power consumption device provided by the embodiment of the present application has the same technical effects because it adopts the battery device provided by any of the above embodiments, and will not be elaborated herein.

[0030] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0032] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0033] Figure 2 Structural schematic diagram of a battery cell group in a battery device provided for some embodiments of the present application being grouped with a gap on a glue-blocking structure;

[0034] Figure 3 For Figure 2 top view;

[0035] Figure 4 Top view of the glue-blocking structure in the battery device provided for some embodiments of the present application;

[0036] Figure 5 Cross-sectional view of a battery cell group in a battery device provided for some embodiments of the present application being arranged in a box body;

[0037] Figure 6 Axonometric view of the glue-blocking structure in the battery device provided for some embodiments of the present application;

[0038] Figure 7 Structural schematic diagram of the second glue-blocking member and the first insulating member in the glue-blocking structure of the battery device provided for some embodiments of the present application being turned up;

[0039] Figure 8 Front view of a battery cell group in a battery device provided for some embodiments of the present application being grouped with a gap on a glue-blocking structure.

[0040] Icons: 1000 - Vehicle; 100 - Battery device; 200 - Controller; 300 - Motor; 10 - Box; 13 - Bottom wall; 14 - Second side wall; 20 - Battery cell group; 21 - Battery cell; 211 - First battery cell; 212 - Second battery cell; 30 - Rubber protection structure; 31 - First rubber protection part; 311 - First rubber strip; 312 - Second rubber strip; 313 - Hollow area; 32 - Second rubber protection part; 321 - Second adhesive tape; 322 - Second base layer; 33 - First insulating part; 331 - Third adhesive tape; 332 - First insulating layer; 34 - First connection crease; 35 - Second connection crease; X - First direction; Y - Second direction. Detailed implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0043] Referring to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0044] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. 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.

[0045] In the present application, the term "and / or" is merely a correlative relationship describing related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "or" relationship between the related objects before and after.

[0046] In the present application, "a plurality of" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple sheets" means two or more sheets (including two sheets).

[0047] The battery device (BatteryApparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (BatteryCellAssembly) may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0048] In some embodiments, the battery cell assembly (BatteryCellAssembly) is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module (BatteryModule), and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with cable ties.

[0049] In some embodiments, the battery device can be a battery pack (batteryPack), and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0050] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0051] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0052] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, part of the box body can form at least part of the floor of the vehicle, or part of the box body can form at least part of the cross beams and longitudinal beams of the vehicle.

[0053] In some embodiments, the battery device can be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0054] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to be used.

[0055] The battery cell can be, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium-metal battery, a sodium-metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0056] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0057] In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0058] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0059] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material substrate layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0060] As an example, the positive electrode active material can include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery cell can also be used.

[0061] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0062] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrodes, carbon, nickel, or titanium, etc. may be used.

[0063] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0064] As an example, the negative electrode active material may be a negative electrode active material for battery cells known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. The silicon-based materials may be selected from at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based materials may be selected from at least one of elemental tin, tin oxides, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0065] In some embodiments, the separator is an insulating film. The present application has no particular limitation on the type of the insulating film, and any well-known porous insulating film with good chemical stability and mechanical stability may be selected.

[0066] As an example, the main material of the insulating film may be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The insulating film may be a single-layer film or a multi-layer composite film, without particular limitation. When the insulating film is a multi-layer composite film, the materials of each layer may be the same or different, without particular limitation. The separator may be a separate component located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes.

[0067] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0068] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0069] In some embodiments, the electrode assembly is a laminated structure.

[0070] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as an electrode assembly and an electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite housing), or an aluminum-plastic film, etc.

[0071] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating substances such as an electrode assembly and an electrolyte. The housing body can be provided with one or more openings. One or more end caps can also be provided.

[0072] In some embodiments, at least one electrode terminal is provided on the housing. The electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing body.

[0073] In some embodiments, a burst valve is provided on the housing. The burst valve is used to release the internal pressure of the battery cell.

[0074] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal-prismatic battery, etc. There is no particular limitation in the embodiments of the present application.

[0075] In battery technology, when a CTP module is put into a box, a heat insulation pad is usually provided between the large faces of two adjacent battery cells. The heat insulation pad bonds and groups the large faces and side faces of the battery cells to prevent the structural adhesive from overflowing to the large faces of the battery cells. However, the large number of heat insulation pads results in a problem of complex structure and high cost of the battery cell group. In order to meet the current market requirement for low-cost battery packs and optimize the structure of the battery cell group, the heat insulation pad between two adjacent battery cells is cancelled. However, due to the gap between the large faces of two adjacent battery cells, the structural adhesive on the bottom wall of the box is likely to overflow into the gap between the battery cells, resulting in a risk that the hardened overflowed adhesive on the large face of the battery cell extrudes the battery cell, causing local lithium plating and voltage drop, and affecting the reliability of the battery device.

[0076] In view of this, to solve the problem of poor reliability of the battery device, some embodiments of the present application provide a battery device, which includes a box body, a battery cell group, and a glue-blocking structure. The box body includes a bottom wall and two first side walls oppositely arranged in a first direction. The battery cell group is arranged in the box body, and the bottom wall bears the battery cell group. The battery cell group includes a plurality of battery cells distributed in a stacked manner. The glue-blocking structure includes a first glue-blocking member and a second glue-blocking member. The first glue-blocking member is arranged between the battery cell group and the bottom wall. The second glue-blocking member is arranged on opposite sides of the first glue-blocking member in the first direction and is connected to the first glue-blocking member. The second glue-blocking member is located between the battery cell group and the first side wall. The first direction is perpendicular to the thickness direction of the first glue-blocking member. Among them, the first glue-blocking member includes a plurality of first glue-blocking strips spaced transversely and a plurality of second glue-blocking strips spaced longitudinally. The plurality of first glue-blocking strips and the plurality of second glue-blocking strips are connected to each other to form a plurality of hollow areas. On the same projection plane perpendicular to the thickness direction of the bottom wall, the orthographic projection of the battery cell falls on the orthographic projections of the first glue-blocking strips and the second glue-blocking strips. The orthographic projection of each battery cell covers a hollow area, and an adhesive layer is arranged in the hollow area. The battery cell is bonded to the bottom wall through the adhesive layer. The battery cell is bonded to the first glue-blocking strips and the second glue-blocking strips. The opposite sides of two adjacent battery cells are both arranged on the same first glue-blocking strip or the second glue-blocking strip.

[0077] In the battery device provided by the embodiments of the present application, the battery cell is bonded and fixed to the first glue-blocking strips and the second glue-blocking strips. The first glue-blocking member can bear and limit the battery cell, enabling the battery cell to be stably bonded and fixed to the first glue-blocking member, realizing the gap grouping of multiple battery cells in the battery cell group, which is beneficial to the transportation of the battery cell group and the stability of the battery cell group during transportation. On the other hand, the corresponding part of the battery cell and the hollow area can be bonded to the adhesive layer on the bottom wall of the box body. Since the first glue-blocking strips and the second glue-blocking strips are hermetically bonded to the bottom periphery of the battery cell, the first glue-blocking strips and the second glue-blocking strips enclose the circumference of the battery cell, which can not only prevent the series connection of the condensed water on the bottom surfaces of two adjacent battery cells, reduce the risk of the condensed water gathering at the bottom of the battery cell, but also play a role in blocking the adhesive layer on the bottom wall of the box body, so that the structural adhesive cannot overflow from the gap between the battery cell and the first glue-blocking strips and the second glue-blocking strips to the large surface area of the battery cell, thereby reducing the risk of local lithium plating and voltage drop caused by the structural adhesive on the bottom wall overflowing from the gap between the battery cell and the first glue-blocking member to the large surface area of the battery cell, and improving the reliability of the battery device.

[0078] The battery device disclosed in the embodiments of the present application can be but is not limited to being used in power-consuming devices such as vehicles, ships, or aircraft. The power system of the power-consuming device can be composed of the battery device disclosed in the present application.

[0079] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, battery cars, electric toys, power tools, vehicles, ships, and spacecrafts, etc. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0080] For the convenience of description in the following embodiments, a vehicle, which is an electrical device in an embodiment of this application, is taken as an example for illustration.

[0081] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be disposed at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000 and be used for the circuit system of the vehicle 1000, such as for the working power requirements during the start, navigation, and operation of the vehicle 1000.

[0082] The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0083] In some embodiments of this application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0084] The battery device 100 includes a box body and battery cells. The battery cells are accommodated in the box body. Among them, the box body is used to provide an accommodation space for the battery cells, and the box body can adopt various structures.

[0085] In the battery device 100, there can be multiple battery cells. The multiple battery cells can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells. The multiple battery cells can be directly connected in series, in parallel, or in a series-parallel combination together, and then the whole formed by the multiple battery cells is accommodated in the box body. Of course, the battery device 100 can also be in the form that multiple battery cells are first connected in series, in parallel, or in a series-parallel combination to form battery modules, and then the multiple battery modules are connected in series, in parallel, or in a series-parallel combination to form a whole and are accommodated in the box body.

[0086] The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar for realizing electrical connection between multiple battery cells.

[0087] An embodiment of the present application provides a battery device. Please refer to Figures 2 to 5 , the battery device 100 includes a box body 10, a battery cell group 20, and a glue blocking structure 30. The box body 10 includes a bottom wall 13 and two first side walls oppositely arranged along a first direction X. The battery cell group 20 is arranged in the box body 10, and the bottom wall 13 bears the battery cell group 20. The battery cell group 20 includes a plurality of battery cells 21 stacked and distributed; the glue blocking structure 30 includes a first glue blocking member 31 and a second glue blocking member 32. The first glue blocking member 31 is arranged between the battery cell group 20 and the bottom wall 13. The second glue blocking member 32 is arranged on opposite sides of the first glue blocking member 31 in the first direction X and is connected to the first glue blocking member 31. The second glue blocking member 32 is located between the battery cell group 20 and the first side wall. The first direction X is perpendicular to the thickness direction of the first glue blocking member 31; wherein, the first glue blocking member 31 includes a plurality of first glue blocking strips 311 spaced transversely and a plurality of second glue blocking strips 312 spaced longitudinally. The plurality of first glue blocking strips 311 and the plurality of second glue blocking strips 312 are connected to each other to form a plurality of hollow areas 313; on the same projection plane perpendicular to the thickness direction of the bottom wall 13, the orthographic projection of the battery cell 21 falls on the orthographic projections of the first glue blocking strips 311 and the second glue blocking strips 312. The orthographic projection of each battery cell 21 covers a hollow area 313. A glue layer is arranged in the hollow area 313, and the battery cell 21 is bonded to the bottom wall 13 through the glue layer; the battery cell 21 is bonded to the first glue blocking strips 311 and the second glue blocking strips 312, and on the opposite sides of two adjacent battery cells 21 facing each other, they are both arranged on the same first glue blocking strip 311 or second glue blocking strip 312.

[0088] The first glue blocking member 31 is a grid structure. The plurality of first glue blocking strips 311 and the plurality of second glue blocking strips 312 in the first glue blocking member 31 may be integrally formed, and the areas where the first glue blocking strips 311 and the second glue blocking strips 312 intersect form a plurality of hollow areas 313.

[0089] The material of the first glue blocking member may be polyacrylate foam. The hardness Shore A of the first glue blocking member may be 30-50, and the Ra value of the roughness of the first glue blocking member is 0.5-2.0 μm.

[0090] A plurality of battery cells 21 are stacked and distributed on the first rubber-blocking member 31, and the stacking direction of the plurality of battery cells 21 is parallel to the length direction of the first rubber-blocking strip 311 or the second rubber-blocking strip 312. Each battery cell 21 corresponds to a hollowed-out area 313 on the first rubber-blocking member 31, that is, each battery cell 21 covers a hollowed-out area 313, and the orthographic projection of the periphery of the battery cell 21 falls on the first rubber-blocking strip 311 and the second rubber-blocking strip 312 on the periphery of the corresponding hollowed-out area 313, and the periphery of the battery cell 21 closes the hollowed-out area 313. The number and position of the hollowed-out areas 313 correspond one-to-one to the number and position of the battery cells 21.

[0091] An adhesive layer is provided on the bottom wall 13, and the adhesive layer is used for bonding and fixing with the battery cell 21, so that the battery cell 21 is fixedly bonded to the bottom wall 13 of the box body 10. The hollowed-out area 313 on the first rubber-blocking member 31 can expose a partial area of the bottom surface of the corresponding battery cell 21, and the exposed area of the bottom surface of the battery cell 21 can be adhesively fixed to the adhesive layer on the bottom wall 13 of the box body 10 through the hollowed-out area 313. The adhesive layer on the bottom wall 13 can be pre-coated on the bottom wall 13 of the box body 10. After the battery cell group 20 is put into the box, the area of the battery cell 21 corresponding to the hollowed-out area 313 is adhesively fixed to the adhesive layer on the bottom wall 13 of the box body 10, and the bonding and fixing of the battery cell group 20 and the bottom wall 13 is completed. The periphery of the battery cell 21 is bonded to the first rubber-blocking strip 311 and the second rubber-blocking strip 312 to close the hollowed-out area 313, and prevent the adhesive (such as structural adhesive) on the bottom wall 13 from overflowing from the gap between the battery cell 21 and the first rubber-blocking strip 311 or the second rubber-blocking strip 312 to the large surface area of the battery cell 21.

[0092] The adhesive layer on the bottom wall 13 can be a structural adhesive. A structural adhesive refers to an adhesive with high strength (compressive strength > 65 MPa, steel-steel positive tensile bonding strength > 30 MPa, shear strength > 18 MPa), which can bear large loads, and is resistant to aging, fatigue and corrosion, and has stable performance within the expected service life, and is suitable for bonding structural parts that bear strong forces.

[0093] The thickness of the first rubber-blocking strip 311 and the second rubber-blocking strip 312 can be 0.6 mm - 0.9 mm. Optionally, the thickness of the first rubber-blocking strip 311 and the second rubber-blocking strip 312 is 0.8 mm.

[0094] It should be noted that the gap between the large faces of two adjacent battery cells 21 does not always exist. As the number of charge and discharge cycles of the battery cell 21 increases, the large face of the battery cell 21 will show a slight swelling phenomenon. Therefore, the aforementioned stacking interval of the battery cells 21 is set on the first rubber stop member 31, and it can be defined that when the number of charge and discharge cycles of the battery cell 21 is within 10 times, there will be a gap between two adjacent battery cells 21 on the first rubber stop member 31. When the number of charge and discharge cycles of the battery cell group 20 exceeds a certain number, due to the swelling deformation of the large face of the battery cell 21, there may be a phenomenon that the large faces of two adjacent battery cells 21 are close to or even in contact with each other. The large face of the battery cell 21 is also the surface with the largest area of the battery cell 21.

[0095] The first side wall refers to the side wall structure provided on both sides of the first direction X of the bottom wall 13. One end of the first side wall is connected to the bottom wall 13, and the other end of the first side wall extends in a direction away from the bottom wall 13.

[0096] The number of the second rubber stop members 32 can be two, and the second rubber stop members 32 are arranged between each first side wall and the battery cell group 20. The second rubber stop member 32 is a plate-like structure, and the second rubber stop member 32 can cover the two side faces of the battery cell group 20 in the first direction X.

[0097] In the technical solution of the embodiment of the present application, a first glue-blocking member 31 is provided between the bottom wall 13 of the box body 10 and the battery cell group 20. The first glue-blocking member 31 is composed of a plurality of first glue-blocking strips 311 spaced transversely and a plurality of second glue-blocking strips 312 spaced longitudinally to form a grid structure. The orthographic projections of the respective battery cells 21 in the battery cell group 20 fall on the corresponding first glue-blocking strips 311 and second glue-blocking strips 312, and the orthographic projection of each battery cell 21 covers a hollow area 313. The opposite sides of two adjacent battery cells 21 are both arranged on the same first glue-blocking strip 311 or second glue-blocking strip 312, and the respective battery cells 21 are spaced apart and arranged on the first glue-blocking member 31 to close the respective hollow areas 313 on the first glue-blocking member 31. On the one hand, the battery cells 21 are adhesively fixed to the first glue-blocking strips 311 and the second glue-blocking strips 312. The first glue-blocking member 31 can function to carry and position the battery cells 21, enabling the battery cells 21 to be stably adhesively fixed to the first glue-blocking member 31, realizing the gap grouping of the multiple battery cells 21 in the battery cell group 20, which is beneficial to the transportation of the battery cell group 20 and the stability of the battery cell group 20 during transportation. On the other hand, the corresponding parts of the battery cells 21 and the hollow areas 313 can be adhesively bonded to the glue layer on the bottom wall 13 of the box body 10. Since the first glue-blocking strips 311 and the second glue-blocking strips 312 are hermetically adhesively bonded to the bottom periphery of the battery cells 21, the first glue-blocking strips 311 and the second glue-blocking strips 312 seal the circumference of the battery cells 21. This can not only prevent the series connection of the condensed water on the bottom surfaces of two adjacent battery cells 21 and reduce the risk of the condensed water gathering at the bottom of the battery cells 21, but also play a role in blocking the glue layer on the bottom wall 13 of the box body 10, preventing the glue (such as structural glue) on the bottom wall 13 from overflowing from the gap between the battery cells 21 and the first glue-blocking strips 311 and the second glue-blocking strips 312 to the large surface area of the battery cells 21. Thus, it reduces the risk of local lithium deposition and voltage drop of the battery cells 21 caused by the glue on the bottom wall 13 overflowing from the gap between the battery cells 21 and the first glue-blocking member 31 to the large surface area of the battery cells 21 and then the cured overflowed glue on the large surface of the battery cells 21 forming a hard object to squeeze the battery cells 21, improving the reliability of the battery device 100. By providing second glue-blocking members 32 on both sides of the first glue-blocking member 31 in the first direction X, and the second glue-blocking members 32 are located between the battery cell group 20 and the first side wall. Even if a part of the structural glue on the bottom wall 13 overflows to both sides of the battery cell group 20 in the first direction X, the second glue-blocking members 32 are provided on both sides of the battery cell group 20 in the first direction X. The second glue-blocking members 32 can function to block the structural glue overflowing from the bottom wall 13, reducing the risk of the structural glue overflowing from the side of the battery cell group 20 to the large surface of the battery cells 21.

[0098] According to some embodiments of the present application, the battery cell 21 has a first surface facing the first glue blocking member 31. The first surface includes a first region and a second region. Along the thickness direction of the bottom wall 13, the first region overlaps with the hollowed-out region 313, and the second region does not overlap with the hollowed-out region 313. The second region is located on the periphery of the first region; the battery cell 21 is bonded to the glue layer through the first region, and the battery cell 21 is bonded to the first glue blocking strip 311 and the second glue blocking strip 312 through the second region.

[0099] The first surface refers to the surface of the battery cell 21 facing the first glue blocking member 31 or the bottom wall 13. The first region refers to the central region of the first surface of the battery cell 21, that is, the region where the battery cell 21 overlaps with the hollowed-out region 313. The second region refers to the outer peripheral region of the first region of the first surface of the battery cell 21, that is, the region where the first surface of the battery cell 21 overlaps with the first glue blocking strip 311 and the second glue blocking strip 312.

[0100] The first region of the first surface of the battery cell 21 can be bonded and fixed to the glue layer of the bottom wall 13 through the hollowed-out region 313, so as to realize the bonding and fixing of the battery cell 21 to the bottom wall 13 of the box body 10. The second region on the first surface of the battery cell 21 is bonded and fixed to the first glue blocking strip 311 and the second glue blocking strip 312, so as to realize the gap grouping of the battery cell group 20 on the first glue blocking member 31 before the battery cell group 20 is put into the box.

[0101] The first region of the battery cell 21 can be bonded to the glue layer on the bottom wall 13 of the box body 10 through the hollowed-out region 313, so as to complete the bonding and fixing of each battery cell 21 in the battery cell group 20 to the bottom wall 13 of the box body 10. The second region is located on the periphery of the first region. The battery cell 21 contacts the first glue blocking strip 311 and the second glue blocking strip 312 through the second region, and is bonded and fixed to the first glue blocking strip 311 and the second glue blocking strip 312, so as to complete the bonding and fixing of each battery cell 21 in the battery cell group 20 to the first glue blocking strip 311, and realize the gap grouping of multiple battery cells 21 in the battery cell group 20 on the first glue blocking member 31.

[0102] According to some embodiments of the present application, the first glue blocking member 31 includes a first base layer and a first glue paper. The first base layer is bonded to the glue layer of the bottom wall 13, and the first glue paper is arranged on the side of the first base layer facing the battery cell 21. The first glue blocking member 31 is bonded to each battery cell 21 through the first glue paper.

[0103] The first glue paper can be a double-sided glue paper. The side of the double-sided glue paper facing the first base layer is bonded to the first base layer after tearing off the release paper. After tearing off the release paper on the side of the double-sided glue away from the first base layer, the glue layer is exposed, and then the bonding with the battery cell 21 can be realized.

[0104] By providing a first adhesive tape on the first base layer, the areas where the battery cell 21 contacts the first glue-blocking strip 311 and the second glue-blocking strip 312 can be adhesively fixed to the first glue-blocking member 31 through the first adhesive tape, completing the adhesive positioning of multiple battery cells 21 and achieving the grouped arrangement of multiple battery cells 21 in the battery cell group 20 with gaps therebetween.

[0105] According to some embodiments of the present application, please refer to Figure 6 , Figure 7 and Figure 8 , the battery cell group 20 includes multiple first battery cells 211 located at both ends in the first direction X. The second glue-blocking member 32 is used for adhesively bonding to the corresponding side surfaces of the first battery cells 211, and the first direction X is perpendicular to the stacking direction of the battery cells 21.

[0106] The multiple battery cells 21 of the battery cell group 20 are distributed in a matrix along the first direction X and the second direction Y. The first battery cells 211 refer to the battery cells 21 located at both ends in the first direction X in the battery cell group 20. The second glue-blocking member 32 is adhesively fixed to the side surfaces of the multiple first battery cells 211, and the second glue-blocking member 32 can cover both ends of the battery cell group 20 in the first direction X.

[0107] By adhesively bonding the second glue-blocking member 32 to the side surfaces of the first battery cells 211 in the battery cell group 20, the second glue-blocking member 32 has better conformity with the side surfaces of the battery cell group 20 in the first direction X. There is less likely to be a gap between the second glue-blocking member 32 and the first battery cells 211, and the sealing performance is better. Further, it plays a role in blocking the structural adhesive on the bottom wall 13, reducing the risk of the structural adhesive overflowing from the gap between the second glue-blocking member 32 and the first battery cells 211 to the large surfaces of the battery cells 21.

[0108] According to some embodiments of the present application, please refer to Figure 2 and Figure 3 , along the first direction X, the second glue-blocking member 32 includes a second base layer 322 and a second adhesive tape 321. The second adhesive tape 321 is provided on the side of the second base layer 322 facing the first battery cells 211. The second glue-blocking member 32 is adhesively bonded to the multiple first battery cells 211 through the second adhesive tape 321.

[0109] The second adhesive tape 321 can be a double-sided adhesive tape. After tearing off the release paper on the side of the double-sided adhesive tape facing the second base layer 322, the double-sided adhesive tape is adhesively bonded to the second base layer 322 to achieve the adhesive fixation of the double-sided adhesive tape to the second glue-blocking member 32. After tearing off the release paper on the side of the double-sided adhesive tape away from the second base layer 322, the adhesive fixation of the second glue-blocking member 32 to the side surfaces of the first battery cells 211 can be achieved.

[0110] Of course, the second adhesive tape 321 can be fully laid on the second base layer 322, that is, the second adhesive tape 321 covers the entire surface of the second base layer 322 facing the battery cell group 20. Of course, the second adhesive tape 321 can also be partially laid on the second base layer 322, and the laying position of the second adhesive tape 321 can be determined according to the actual situation.

[0111] By providing the second adhesive tape 321 on the second base layer 322, the second adhesive tape 321 can achieve the bonding and fixing of the second glue-blocking member 32 to the corresponding first battery cell 211, and realize the bonding and fixing of the second glue-blocking member 32 to the battery cell group 20. The second glue-blocking member 32 can block the structural adhesive overflowing from both sides of the bottom wall 13 in the first direction X.

[0112] According to some embodiments of the present application, please refer to Figure 3 , a plurality of battery cells 21 are arranged in a matrix in the first direction X and the second direction Y. A plurality of first battery cells 211 located at the same end in the first direction X are spaced apart along the second direction Y; along the second direction Y, there is a first gap between two adjacent first battery cells 211. The second adhesive tape 321 covers at least the first gap. The second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the surface of the battery cell 21 with the largest area.

[0113] The second adhesive tape 321 covering at least the first gap means that the second adhesive tape 321 is at least provided in the first gap area between adjacent first battery cells 211. The second adhesive tape 321 can bond and fix the adjacent two first battery cells 211 to the second glue-blocking member 32, thereby sealing the gap area between the adjacent two first battery cells 211 and the second glue-blocking member 32. Even if the structural adhesive on the bottom wall 13 overflows to the side of the second glue-blocking member 32 facing the battery cell group 20, due to the sealing bonding of the area where the first gap between the adjacent two first battery cells 211 is located to the second glue-blocking member 32, the structural adhesive cannot enter the large surface area between the adjacent two battery cells 21.

[0114] By covering the second adhesive tape 321 in the area corresponding to the first gap between two adjacent battery cells 21 on the second base layer 322, even if the structural adhesive on the bottom wall 13 overflows to the side of the second glue-blocking member 32 facing the battery cell group 20, the second adhesive tape 321 can seal and bond the first gap area of the two first battery cells 211 to the second glue-blocking member 32, block the gap area between the adjacent two first battery cells 211 and the second glue-blocking member 32, and prevent the structural adhesive from overflowing from the first gap between the adjacent two battery cells 21 into the large surface area of the battery cell 21. On the premise of reducing the risk of the structural adhesive on the bottom wall overflowing to the large surface of the battery cell 21, the amount of glue used for the second adhesive tape 321 on the second glue-blocking member 32 can be reduced, saving costs.

[0115] According to some embodiments of the present application, the second rubber stopper 32 and the first rubber stopper 31 are integrally formed.

[0116] The first rubber stopper 31 and the second rubber stopper 32 are integrally formed, and the second rubber stopper 32 does not need to be assembled again, so the structure is simple and the structural stability of the rubber stopper structure 30 is higher.

[0117] According to some embodiments of this application, please refer to Figure 4 A first connecting fold 34 is provided between the second rubber blocking member 32 and the first rubber blocking member 31 , and the first connecting fold 34 is used to enable the second rubber blocking member 32 to flip relative to the first rubber blocking member 31 .

[0118] The first connection crease 34 refers to the bending and shaping process of the intersection of the second rubber stopper 32 and the first rubber stopper 31 , so that the second rubber stopper 32 and the first rubber stopper 31 can realize relative folding movement through the first connection crease 34 .

[0119] The first rubber stopper 31 is connected to the second rubber stopper 32 via the first connecting fold 34. After the battery cell group 20 is bonded to the first rubber stopper 31, when the battery cell group 20 is put into the box, after the second rubber stopper 32 contacts the first side wall of the box body 10, the first side wall has a certain blocking effect on the second rubber stopper 32, guiding the second rubber stopper 32 to fold upward along the first connecting fold 34, so that the second rubber stopper 32 is attached to the side of the battery cell group 20 to complete the assembly. There is no need to manually bond and fix the second rubber stopper 32 to the battery cell group 20, and the assembly is simpler.

[0120] According to some embodiments of this application, please combine Figures 2 to 5 The box body 10 also includes a second side wall 14 arranged oppositely along the second direction Y; the rubber blocking structure 30 also includes a first insulating member 33, the first insulating member 33 is arranged on the opposite sides of the first rubber blocking member 31 in the second direction Y, and is located between the battery cell group 20 and the second side wall 14; the battery cell group 20 includes a plurality of second battery cells 212 located at both ends of the second direction Y, the first insulating member 33 is bonded to the second battery cells 212, and the first insulating member 33 and the second rubber blocking member 32 are arranged around the outer periphery of the first rubber blocking member 31; the second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the surface of the battery cell 21 with the largest area.

[0121] The second side wall 14 refers to a side wall structure disposed on both sides of the bottom wall 13 in the second direction Y. The second side wall 14 and the first side wall are disposed together around the circumference of the bottom wall 13 to form the side wall of the box body 10 .

[0122] The second direction Y is perpendicular to the surface of the battery cell 21 with the largest area, that is, the second direction Y is parallel to the stacking direction of the plurality of battery cells 21 .

[0123] The first insulating member 33 is disposed between the battery cell group 20 and the second side wall 14 . The first insulating member 33 can insulate the battery cell group 20 from the second side wall 14 .

[0124] Through the arrangement of the first insulating member 33, the first insulating member 33 can insulate the large surface of the battery cell 21 from the second side wall 14 of the box body 10. At the same time, the first insulating member 33 and the second adhesive stopper 32 are arranged around the outer periphery of the first adhesive stopper 31. The first insulating member 33 and the second adhesive stopper 32 cooperate to block the overflow of the structural adhesive from the peripheral side of the battery cell group 20, thereby reducing the risk of the structural adhesive overflowing to the large surface of the battery cell 21.

[0125] According to some embodiments of the present application, the first insulating member 33 includes a first insulating layer 332 and a third adhesive tape 331 . The third adhesive tape 331 is disposed on a side of the first insulating layer facing the second battery cell 212 . The first insulating member 33 is bonded to the second battery cell 212 via the third adhesive tape 331 .

[0126] The third adhesive tape 331 may be a double-sided adhesive tape. After the release paper on the side of the double-sided adhesive tape facing the first insulating layer 332 is torn off, the double-sided adhesive tape is bonded to the first insulating layer 332. After the release paper on the side of the double-sided adhesive tape facing away from the first insulating layer 332 is torn off, the adhesive layer is exposed, and bonding with the side of the second battery cell 212 can be achieved. Of course, the third adhesive tape 331 may cover the first insulating layer 332, or may be partially attached to the first insulating layer 332. The attachment position of the third adhesive tape 331 depends on the actual situation.

[0127] The first insulating layer 332 can insulate the large surface of the battery cell 21 from the second side wall 14 of the box body 10. A third adhesive tape 331 is provided on the first insulating layer 332 on the side facing the battery cell group 20. The third adhesive tape 331 can achieve the bonding and fixation of the first insulating member 33 and the corresponding second battery cell 212, thereby blocking the structural adhesive overflowing from the outside of the battery cell group 20.

[0128] According to some embodiments of the present application, a second connection fold 35 is provided between the first insulating member 33 and the first rubber stop member 31 , and the second connection fold 35 is used to enable the first insulating member 33 to flip relative to the first rubber stop member 31 .

[0129] The second connection fold 35 refers to the bending and shaping process of the intersection of the first insulating member 33 and the first rubber stopper 31 , so that the first insulating member 33 and the first rubber stopper 31 can realize relative folding movement through the second connection fold 35 .

[0130] The first insulating member 33 is connected to the first rubber blocking member 31 through a second connecting crease 35. After the battery cell group 20 is bonded to the first rubber blocking member 31, during the process of the battery cell group 20 being put into the box, under the blocking action of the second side wall 14 of the box body 10, the first insulating member 33 is guided to turn upward relative to the first rubber blocking member 31 along the second connecting crease 35. After the first insulating member 33 abuts against the side surface of the second battery cell 212 and is pasted on the side surface of the second battery cell 212 in the battery cell group 20, the assembly of the battery cell group 20 into the box is completed. There is no need to manually bond and fix the first insulating member 33 and the battery cell group 20, and the assembly is simpler.

[0131] The following describes the assembly steps of the battery device 100. Place the rubber blocking structure 30 on the tooling, use the limiting mechanism to position the rubber blocking structure 30, and then tear off the release papers of the corresponding adhesive tapes on the first rubber blocking member 31, the second rubber blocking member 32, and the first insulating member 33; stack multiple battery cells 21 into a group on the first rubber blocking member 31, each battery cell 21 covering a hollow area 313, and the bottoms of the respective battery cells 21 are adhesively pasted to the first rubber blocking strips 311 and the second rubber blocking strips 312 at the corresponding positions on the first rubber blocking member 31. After all the battery cells 21 of a set of Pack are assembled with the rubber blocking structure 30 into a Block. Detect the gaps between the battery cells 21 in the battery cell group 20. After meeting the design requirements, use a suction cup to suck the top of the Block, and then use the box loading device to grab the Block and load it into the box body 10; during the box loading process, it is necessary to ensure the relative positions of the second rubber blocking member 32 and the first insulating member 33 in the rubber blocking structure 30 to ensure the effective action of the corresponding connecting creases. The second rubber blocking member 32 and the first insulating member 33 turn upward and are adhesively fixed to the corresponding parts of the battery cell group 20 to complete the box loading.

[0132] The embodiment of the present application further provides an electrical device, which includes the battery device 100 of any one of the foregoing embodiments, and the electrical device is used to provide electrical energy.

[0133] In some embodiments, please refer to Figures 2 to 8, the battery device includes a box body 10, a battery cell group 20 and a glue-blocking structure 30. The box body 10 includes a bottom wall 13. The battery cell group 20 is arranged inside the box body 10, and the bottom wall 13 bears the battery cell group 20. The battery cell group 20 includes a plurality of battery cells 21 distributed in a stacked manner; the glue-blocking structure 30 includes a first glue-blocking member 31, and the first glue-blocking member 31 is arranged between the battery cell group 20 and the bottom wall 13; wherein, the first glue-blocking member 31 includes a plurality of first glue-blocking strips 311 spaced transversely and a plurality of second glue-blocking strips 312 spaced longitudinally, and the plurality of first glue-blocking strips 311 and the plurality of second glue-blocking strips 312 are connected to each other to form a plurality of hollow areas 313; on the same projection plane perpendicular to the thickness direction of the bottom wall 13, the orthographic projection of the battery cell 21 falls on the orthographic projections of the first glue-blocking strips 311 and the second glue-blocking strips 312, and the orthographic projection of each battery cell 21 covers a hollow area 313. A glue layer is arranged in the hollow area 313, and the battery cell 21 is bonded to the bottom wall 13 through the glue layer; the battery cell 21 is bonded to the first glue-blocking strips 311 and the second glue-blocking strips 312, and one side of two adjacent battery cells 21 facing each other is arranged on the same first glue-blocking strip 311 or the second glue-blocking strip 312. The battery cell 21 has a first surface facing the first glue-blocking member 31. The first surface includes a first area and a second area. Along the thickness direction of the bottom wall 13, the first area overlaps with the hollow area 313, and the second area does not overlap with the hollow area 313. The second area is located on the periphery of the first area; the battery cell 21 is bonded to the glue layer through the first area, and the battery cell 21 is bonded to the first glue-blocking strips 311 and the second glue-blocking strips 312 through the second area.

[0134] The battery cell 21 is adhesively fixed to the first rubber strip 311 and the second rubber strip 312. The first rubber strip 31 can function to support and position the battery cell 21, enabling the battery cell 21 to be stably adhesively fixed to the first rubber strip 31, achieving the grouped arrangement of multiple battery cells 21 in the battery cell group 20 with gaps therebetween, which is beneficial to the transportation of the battery cell group 20 and the stability of the battery cell group 20 during transportation. On the other hand, the corresponding part of the battery cell 21 and the hollow area 313 can be adhesively bonded to the adhesive layer on the bottom wall 13 of the box body 10. Since the first rubber strip 311 and the second rubber strip 312 are hermetically adhesively bonded to the bottom periphery of the battery cell 21, the first rubber strip 311 and the second rubber strip 312 circumferentially enclose the battery cell 21, which can not only prevent the series connection of the condensed water on the bottom surfaces of two adjacent battery cells 21, reducing the risk of the accumulation of the condensed water at the bottom of the battery cell 21, but also play a blocking role for the adhesive layer on the bottom wall 13 of the box body 10, so that the structural adhesive cannot overflow from the gap between the battery cell 21 and the first rubber strip 311 and the second rubber strip 312 to the large surface area of the battery cell 21, thereby reducing the risk of local lithium deposition and voltage drop caused by the overflow of the structural adhesive on the bottom wall 13 from the gap between the battery cell 21 and the first rubber strip 31 to the large surface area of the battery cell 21 and curing to form a hard object to squeeze the battery cell 21, improving the reliability of the battery device. The first area of the battery cell 21 can be adhesively bonded to the adhesive layer on the bottom wall 13 of the box body 10 through the hollow area 313, completing the adhesive fixation of each battery cell 21 in the battery cell group 20 to the bottom wall 13 of the box body 10. The second area is located on the circumferential side of the first area. The battery cell 21 contacts the first rubber strip 311 and the second rubber strip 312 through the second area and is adhesively fixed to the first rubber strip 311 and the second rubber strip 312, completing the adhesive fixation of each battery cell 21 in the battery cell group 20 to the first rubber strip 311, and achieving the grouped arrangement of multiple battery cells 21 in the battery cell group 20 with gaps on the first rubber strip 31.

[0135] In some embodiments, the first glue-blocking member 31 includes a first base layer and a first adhesive tape. The first base layer is bonded to the glue layer of the bottom wall 13, and the first adhesive tape is disposed on the side of the first base layer facing the battery cell 21. The first glue-blocking member 31 is bonded to each battery cell 21 through the first adhesive tape. The box body 10 further includes first side walls oppositely disposed along the first direction X; the glue-blocking structure 30 further includes a second glue-blocking member 32, which is disposed on opposite sides of the first glue-blocking member 31 in the first direction X and is located between the battery cell group 20 and the first side wall; the battery cell group 20 includes a plurality of first battery cells 211 at both ends in the first direction X, and the second glue-blocking member 32 is used for bonding to the side surfaces corresponding to the first battery cells 211. The first direction X is perpendicular to the thickness direction of the first glue-blocking member 31, and the first direction X is perpendicular to the stacking direction of the battery cells 21. Along the first direction X, the second glue-blocking member 32 includes a second base layer 322 and a second adhesive tape 321. The second adhesive tape 321 is disposed on the side of the second base layer 322 facing the first battery cell 211. The second glue-blocking member 32 is bonded to the plurality of first battery cells 211 through the second adhesive tape 321. The second glue-blocking member 32 and the first glue-blocking member 31 are integrally formed, and a first connecting crease 34 is provided between the second glue-blocking member 32 and the first glue-blocking member 31. The first connecting crease 34 is used to enable the second glue-blocking member 32 to flip relative to the first glue-blocking member 31.

[0136] The areas where the battery cells 21 are in contact with the first glue-blocking strip 311 and the second glue-blocking strip 312 can be adhesively fixed to the first glue-blocking member 31 through the first adhesive tape, completing the adhesive positioning of the plurality of battery cells 21 and realizing the gap grouping of the plurality of battery cells 21 in the battery cell group 20. The second glue-blocking member 32 is located between the battery cell group 20 and the first side wall and is bonded to the side surfaces of the first battery cells 211 in the battery cell group 20. Even if some of the structural glue on the bottom wall 13 overflows to both sides of the battery cell group 20 in the first direction X, the second glue-blocking member 32 is disposed on both sides of the battery cell group 20 in the first direction X. The second glue-blocking member 32 can block the structural glue overflowing from the bottom wall 13, reducing the risk of the structural glue overflowing from the side of the battery cell group 20 to the large surface of the battery cell 21, and having a better blocking effect on the structural glue. Integrally forming the first glue-blocking member 31 and the second glue-blocking member 32 does not require secondary assembly of the second glue-blocking member 32 and the second glue-blocking member 32, the structure is simple, and the structural stability of the glue-blocking structure 30 is higher.

[0137] In some embodiments, the box body 10 further includes second side walls 14 oppositely arranged along the second direction Y; the glue blocking structure 30 further includes a first insulating member 33, and the first insulating member 33 is arranged on opposite sides of the first glue blocking member 31 along the second direction Y and is located between the battery cell group 20 and the second side wall 14; the battery cell group 20 includes a plurality of second battery cells 212 at both ends in the second direction Y, the first insulating member 33 is bonded to the second battery cells 212, and the first insulating member 33 and the second glue blocking member 32 are arranged around the outer periphery of the first glue blocking member 31; the second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the surface of the battery cell 21 with the largest area. The first insulating member 33 includes a first insulating layer 332 and a third adhesive tape 331, the third adhesive tape 331 is arranged on the side of the first insulating layer facing the second battery cell 212, and the first insulating member 33 is bonded to the second battery cell 212 through the third adhesive tape 331. A second connection crease 35 is provided between the first insulating member 33 and the first glue blocking member 31, and the second connection crease 35 is used to enable the first insulating member 33 to flip relative to the first glue blocking member 31.

[0138] The first insulating member 33 can insulate between the large surface of the battery cell 21 and the second side wall 14 of the box body 10. At the same time, the first insulating member 33 and the second glue blocking member 32 are arranged around the outer peripheral side of the first glue blocking member 31, and the first insulating member 33 and the second glue blocking member 32 cooperate to jointly block the structural adhesive overflowing from the peripheral side of the battery cell group 20, reducing the risk of the structural adhesive overflowing onto the large surface of the battery cell 21. The first insulating layer 332 can insulate between the large surface of the battery cell 21 and the second side wall 14 of the box body 10. A third adhesive tape 331 is arranged on the side of the first insulating layer 332 facing the battery cell group 20, and the third adhesive tape 331 can realize the bonding and fixing of the first insulating member 33 and the corresponding second battery cell 212, thereby blocking the structural adhesive overflowing from the outside of the battery cell group 20. The first insulating member 33 and the first glue blocking member 31 are connected through the second connection crease 35. After the battery cell group 20 is bonded to the first glue blocking member 31, during the process of the battery cell group 20 being put into the box, under the blocking action of the second side wall 14 of the box body 10, the first insulating member 33 is guided to turn up relative to the first glue blocking member 31 along the second connection crease 35. After the first insulating member 33 abuts against the side surface of the second battery cell 212 and is pasted on the side surface of the second battery cell 212 in the battery cell group 20, the assembly of the battery cell group 20 into the box is completed, and there is no need to manually bond and fix the first insulating member 33 and the battery cell group 20, and the assembly is simpler.

[0139] Although the present application has been described with reference to the preferred embodiments, various modifications can be made thereto and components thereof can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, Comprising: A box body, including a bottom wall and two first side walls oppositely arranged in a first direction; A battery cell group, arranged inside the box body, the bottom wall bearing the battery cell group, and the battery cell group including a plurality of battery cells distributed in a stacked manner; A glue-blocking structure, including a first glue-blocking member and a second glue-blocking member, the first glue-blocking member being arranged between the battery cell group and the bottom wall, the second glue-blocking member being arranged on opposite sides of the first glue-blocking member in the first direction and connected to the first glue-blocking member, the second glue-blocking member being located between the battery cell group and the first side wall, and the first direction being perpendicular to the thickness direction of the first glue-blocking member; Wherein, the first glue-blocking member includes a plurality of first glue-blocking strips spaced transversely and a plurality of second glue-blocking strips spaced longitudinally, and the plurality of first glue-blocking strips and the plurality of second glue-blocking strips are connected to each other to form a plurality of hollow areas; On the same projection plane perpendicular to the thickness direction of the bottom wall, the orthographic projection of the battery cell falls on the orthographic projections of the first glue-blocking strip and the second glue-blocking strip, the orthographic projection of each battery cell covers one of the hollow areas, a glue layer is arranged in the hollow area, and the battery cell is bonded to the bottom wall through the glue layer; the battery cell is bonded to the first glue-blocking strip and the second glue-blocking strip, and on the opposite sides of two adjacent battery cells facing each other, both are arranged on the same first glue-blocking strip or the second glue-blocking strip.

2. The battery device according to claim 1, characterized in that The battery cell has a first surface facing the first glue-blocking member, the first surface including a first area and a second area, along the thickness direction of the bottom wall, the first area overlaps with the hollow area, the second area does not overlap with the hollow area, and the second area is located on the periphery of the first area; The battery cell is bonded to the glue layer through the first area, and the battery cell is bonded to the first glue-blocking strip and the second glue-blocking strip through the second area.

3. The battery device according to claim 1, characterized in that, The first glue-blocking member includes a first base layer and a first adhesive paper, the first base layer is bonded to the glue layer of the bottom wall, the first adhesive paper is arranged on the side of the first base layer facing the battery cell, and the first glue-blocking member is bonded to each battery cell through the first adhesive paper.

4. The battery device according to claim 1, characterized in that, The battery cell group includes a plurality of first battery cells at both ends in the first direction, and the second glue-blocking member is used for bonding to the side surfaces corresponding to the first battery cells, and the first direction is perpendicular to the stacking direction of the battery cells.

5. The battery device according to claim 4, characterized in that, Along the first direction, the second glue-blocking member includes a second base layer and a second adhesive paper, the second adhesive paper is arranged on the side of the second base layer facing the first battery cell, and the second glue-blocking member is bonded to the plurality of first battery cells through the second adhesive paper.

6. The battery device according to claim 5, characterized in that, The plurality of battery cells are arranged in a matrix in the first direction and a second direction, and the plurality of first battery cells at the same end in the first direction are spaced apart along the second direction; Along the second direction, there is a first gap between two adjacent first battery cells, and the second adhesive tape covers at least the first gap. The second direction is perpendicular to the first direction and perpendicular to the surface of the battery cell with the largest area.

7. The battery device according to claim 4, characterized in that The second glue-blocking member and the first glue-blocking member are integrally formed.

8. The battery device according to claim 7, characterized in that, A first connecting crease is provided between the second glue-blocking member and the first glue-blocking member, and the first connecting crease is used to enable the second glue-blocking member to flip relative to the first glue-blocking member.

9. The battery device according to claim 1, wherein, The box body further includes second side walls arranged opposite to each other along the second direction; The glue-blocking structure further includes a first insulating member, which is arranged on opposite sides of the first glue-blocking member in the second direction and is located between the battery cell group and the second side wall; The battery cell group includes a plurality of second battery cells located at both ends in the second direction. The first insulating member is bonded to the second battery cell, and the first insulating member and the second glue-blocking member are arranged around the outer periphery of the first glue-blocking member; The second direction is perpendicular to the first direction and perpendicular to the surface of the battery cell with the largest area.

10. The battery device according to claim 9, characterized in that, The first insulating member includes a first insulating layer and a third adhesive tape. The third adhesive tape is arranged on the side of the first insulating layer facing the second battery cell, and the first insulating member is bonded to the second battery cell through the third adhesive tape.

11. The battery device according to claim 10, wherein A second connecting crease is provided between the first insulating member and the first glue-blocking member, and the second connecting crease is used to enable the first insulating member to flip relative to the first glue-blocking member.

12. An electrical device, characterized in that, Including the battery device according to any one of claims 1-11.

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