Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises at least one battery monomer group, an end plate assembly and a fixing band, the battery monomer group comprises a plurality of battery monomers which are sequentially arranged along a first direction, in the same battery monomer group, a first partition plate is arranged between two adjacent battery monomers, and the first partition plate is provided with a first air duct; the end plate assembly and the battery monomer groups are arranged along a first direction, and are arranged at the end part of at least one battery monomer group; and the fixing belt is hooped on the side part of at least one battery monomer group and one side of the end plate assembly back to the battery monomer group. The first partition plate provided with the first air duct is arranged between the two adjacent battery monomers, and the fixing belt is hooped on the side part of at least one battery monomer group and one side, back to the battery monomer group, of the end plate assembly, so that the air inlet area of the first air duct and the contact area between the battery monomers and fluid can be increased; therefore, the heat dissipation effect of the battery device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and particularly relates to a battery device and an electric equipment. BACKGROUND

[0002] With the development of battery technology, battery devices are applied to more and more fields, and gradually replace traditional petrochemical energy in the field of automobile power and the like. In the working process of the battery device, the battery monomer generates heat. If the heat generated by the battery monomer cannot be dissipated in time, the temperature of the battery monomer will rise, and in severe cases, thermal runaway may be caused.

[0003] In the related art, a heat dissipation structure such as a heat dissipation fin or heat conductive glue is usually arranged between the bottom plate of the battery device and the battery monomer to improve the heat dissipation efficiency of the battery monomer. However, the heat dissipation area of the heat dissipation plate, heat conductive glue and the like is reduced, which leads to poor heat dissipation effect of the battery device. Therefore, how to improve the heat dissipation effect of the battery device is a technical problem to be solved in the field at present. UTILITY MODEL CONTENT

[0004] In view of the above problems, the present application provides a battery device and an electric equipment to improve the heat dissipation effect of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising: at least one battery monomer group, the battery monomer group comprising a plurality of battery monomers arranged in a first direction; a first partition plate arranged between two adjacent battery monomers in the same battery monomer group, the first partition plate being provided with a first air duct; an end plate assembly arranged along the first direction with the battery monomer group and arranged at an end of the at least one battery monomer group; and a fixing belt wrapped around a side of the at least one battery monomer group and a side of the end plate assembly away from the battery monomer group. By arranging the first partition plate provided with the first air duct between the two adjacent battery monomers in the same battery monomer group, arranging the end plate assembly at the end of the at least one battery monomer group, and wrapping the fixing belt around the side of the at least one battery monomer group and the side of the end plate assembly away from the battery monomer group, on the one hand, the first air duct can be used for fluid circulation and guiding the fluid to flow between the adjacent battery monomers, which can increase the contact area between the battery monomers and the fluid, expand the heat dissipation area of the battery monomers, and thus improve the heat dissipation efficiency and effect of the battery monomers, and further improve the heat dissipation efficiency and effect of the battery device. On the other hand, the at least one battery monomer group, the end plate assembly, and the first partition plate are bundled into one whole by the fixing belt, which can not only enhance the structural stability and mechanical strength of the battery device, reduce the risk of inclination, shaking, or interference of the battery monomers, the end plate assembly, and the first partition plate, but also reduce the area of the side of the battery monomer group and the first air duct blocked by the fixing belt, thereby increasing the air inlet area of the first air duct and the contact area between the side of the battery monomer group and the fluid, and further improving the heat dissipation efficiency and effect of the battery monomers.

[0006] In some embodiments, the at least one battery monomer group comprises a plurality of battery monomer groups arranged in a second direction, each first partition plate being arranged between two adjacent battery monomers in the at least two battery monomer groups, and the second direction being perpendicular to the first direction. By arranging each first partition plate between the two adjacent battery monomers in the at least two battery monomer groups, the first partition plate can correspond to the battery monomers of the at least two battery monomer groups in the second direction, on the one hand, which can reduce the number of first partition plates, not only reducing the assembly difficulty of the battery device, saving the assembly time of the battery device, and improving the assembly efficiency of the battery device, but also reducing the material cost of the first partition plates, thereby reducing the production cost of the battery device. At the same time, due to the reduction in the number of first partition plates, the probability of failure of the first partition plates can be reduced, thereby reducing the maintenance cost caused by the failure of the first partition plates. On the other hand, the first partition plate can better fix the battery monomers, which helps to enhance the stability and anti-seismic performance of the whole battery device.

[0007] In some embodiments, the at least one battery cell group comprises a plurality of battery cell groups arranged in sequence along a second direction, wherein the second direction is perpendicular to the first direction; and the battery device comprises a plurality of first partitions arranged in sequence along the second direction, and each of the plurality of first partitions is arranged between two adjacent battery cells of different battery cell groups. By arranging the plurality of first partitions arranged in sequence along the second direction between the two adjacent battery cells of different battery cell groups, the two adjacent battery cells can correspond to a single first partition, so that the battery cells can be cooled more fully, which can not only reduce the risk of overheating of the battery cells in the local area of the battery device due to the accumulation of heat in the local area, but also improve the overall cooling effect of the battery device, and the battery cells can be cooled by the corresponding first partition, which can reduce the time length of heat transfer, thereby improving the overall cooling efficiency of the battery device.

[0008] In some embodiments, the first air duct penetrates from the first end face of the first partition to the second end face of the first partition, and the first end face and the second end face are oppositely arranged in the second direction. By making the first air duct penetrate from the first end face of the first partition to the second end face of the first partition, the external fluid can flow into the first air duct from both the first end face and the second end face, which can effectively increase the air inlet area and the air inlet amount, thereby improving the cooling efficiency of the battery cells.

[0009] In some embodiments, the first partition is provided with a ventilation groove and a support part on both sides oppositely arranged along the first direction, the support part abuts against the side of the battery cell facing the first partition, and the ventilation groove penetrates from the first end face to the second end face to form the first air duct. By making the support part abut against the side of the battery cell facing the first partition, and the ventilation groove penetrates from the first end face to the second end face to form the first air duct, on the one hand, the support part abuts against the side of the battery cell facing the first partition, which can not only improve the fixing effect of the first partition on the battery cell, but also reduce the risk of reducing the space of the ventilation groove due to the occupation of the space of the first air duct by the battery cell when it expands, so that the fluid flow area of the ventilation groove will not be affected by the expansion of the battery cell; on the other hand, the ventilation groove penetrates from the first end face to the second end face to form the first air duct, so that the external fluid can flow into the first air duct from both the first end face and the second end face, which can effectively increase the air inlet area and the air inlet amount, thereby improving the cooling efficiency of the battery cells.

[0010] In some embodiments, the ventilation groove comprises a straight groove extending along the second direction. By setting the ventilation groove as a straight groove, the flow resistance of the fluid can be reduced, and the risk of vortex and turbulence of the fluid during the flow in the first air duct can be reduced, thereby improving the flow speed of the fluid, and further improving the cooling efficiency of the battery cells.

[0011] In some embodiments, at least one reinforcing rib is arranged on the bottom wall of the ventilation groove and extends in the second direction, and the reinforcing rib abuts against the side of the battery cell facing the first partition plate. By arranging the reinforcing rib on the bottom wall of the ventilation groove and extending in the second direction, and abutting against the side of the battery cell facing the first partition plate, the reinforcing rib not only does not damage the fluid flow path of the ventilation groove, but also enhances the structural strength of the first partition plate.

[0012] In some embodiments, the battery device further comprises a bottom plate for supporting at least one battery cell group, and a first connecting member arranged between the at least one battery cell group and the bottom plate. By arranging the first connecting member between the battery cell group and the bottom plate, the connection strength between the battery cell group and the bottom plate can be enhanced, the risk of loosening of the bottom plate can be reduced, the reliability of the battery device can be effectively improved, and the anti-vibration and anti-impact capabilities of the bottom plate can be improved, further improving the reliability of the battery device.

[0013] In some embodiments, the first connecting member comprises a double-sided adhesive connecting member, a heat-conducting adhesive connecting member, or a structural adhesive connecting member. The double-sided adhesive connecting member, the heat-conducting adhesive connecting member, and the structural adhesive connecting member all have excellent adhesive properties and aging resistance, so that the first connecting member can maintain adhesion for a long time, which can improve the connection strength and durability between the battery cell group and the bottom plate, and improve the anti-vibration and anti-impact capabilities of the bottom plate. In addition, the heat-conducting adhesive has excellent heat conduction properties, which can quickly conduct the heat of the battery cell group to the bottom plate, effectively improving the heat dissipation efficiency of the battery cell group.

[0014] In some embodiments, the side of the first connecting member facing the battery cell is provided with a second air duct. By arranging the second air duct on the side of the first connecting member facing the battery cell, the heat dissipation effect of the bottom of the battery cell group can be improved, the risk of heat accumulation at the bottom of the battery cell group can be reduced, and the reliability of the battery device can be improved.

[0015] In some embodiments, the battery device further comprises a second connecting member for connecting adjacent two battery cells of two adjacent battery cell groups. By connecting the adjacent two battery cells of the two adjacent battery cell groups through the second connecting member, the connection strength between the adjacent two battery cells of the two adjacent battery cell groups can be improved, and the risk of tilting, shaking, or interference of the battery device due to disconnection between the adjacent two battery cells of the two adjacent battery cell groups during use or movement can be reduced, thereby improving the stability of the battery device.

[0016] In some embodiments, the second connecting member comprises a double-sided adhesive connecting member or a structural adhesive connecting member. Both the double-sided adhesive connecting member and the structural adhesive connecting member have excellent adhesive properties and aging resistance, so that the second connecting member can maintain adhesion for a long time, the connection strength and durability between the two adjacent battery cells of the two adjacent battery cell groups can be improved, the risk of tilting, shaking or interference of the battery device due to disconnection between the two adjacent battery cells of the two adjacent battery cell groups during use or movement can be reduced, and the stability of the battery device can be improved.

[0017] In some embodiments, the battery device further comprises a second partition plate arranged between the two adjacent battery cell groups to form a third air duct between the two adjacent battery cell groups. By arranging the second partition plate between the two adjacent battery cell groups to form the third air duct between the two adjacent battery cell groups, the heat generated by the battery cells can be dissipated between the two adjacent battery cell groups, and the heat dissipation efficiency and effect of the battery device can be further improved.

[0018] In some embodiments, the battery device further comprises a collection assembly arranged on the top of the at least one battery cell group, the collection assembly being electrically connected to the battery cells, and a cover plate arranged on the side of the collection assembly away from the battery cells. By arranging the cover plate on the side of the collection assembly away from the battery cells, the probability of impurities such as dust and liquid contacting the collection assembly and the top of the battery cell group can be reduced, the risk of failure of the collection assembly and the battery cell group can be reduced, and the reliability of the battery device can be improved.

[0019] In a second aspect, the present application provides a power consumption device comprising the above battery device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals in all the drawings represent the same or similar elements. In the drawings:

[0021] Figure 1 is a structural schematic diagram of an embodiment of the power consumption device provided by the present application;

[0022] Figure 2 is a structural schematic diagram of an embodiment of the battery device provided by the present application;

[0023] Figure 3 is a side view of an embodiment of the battery device provided by the present application;

[0024] Figure 4is a cross-sectional structure schematic diagram of an embodiment of the battery device provided in the present application;

[0025] Figure 5 is an exploded structure schematic diagram of an embodiment of the battery device provided in the present application;

[0026] Figure 6 is an exploded structure schematic diagram of another embodiment of the battery device provided in the present application;

[0027] Figure 7 is Figure 6 is an enlarged view of A part in

[0028] Figure 8 is a structure schematic diagram of the first separator of the battery device provided in the present application;

[0029] Figure 9 is an exploded structure schematic diagram of a third embodiment of the battery device provided in the present application.

[0030] The reference signs in the detailed description are as follows:

[0031] Vehicle 1000a, battery device 100a, controller 200a, motor 300a, battery cell group 10, battery cell 11, side 121, end 122, bottom 123, top 124, first separator 20, first air duct 21, air inlet 21a, first end surface 221, second end surface 222, ventilation groove 23, sub-groove 23a, support part 24, reinforcing rib 25, first side 20a, second side 20b, end plate assembly 30, fixing belt 40, first sub-fixing belt 41, second sub-fixing belt 42, bottom plate 50, first connecting piece 60, second connecting piece 70, second separator 80, first edge 81, second edge 82, collection assembly 91, cover plate 92. Detailed description

[0032] The embodiments of the technical solutions of the present application will be described in detail below in combination with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0034] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common set of embodiments, of the application, differing embodiments can be described.

[0035] In the description of the embodiments of the present application, the term“a plurality of” refers to two or more (including two), and similarly,“a plurality of groups” refers to two or more groups (including two groups), and“a plurality of pieces” refers to two or more pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential”, and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0037] In the description of the embodiments of the present application, the term“and / or” is merely a description of the association relationship of the associated objects, and can represent the existence of three relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character“ / ” herein generally represents an“or” relationship between the associated objects before and after it.

[0038] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing”, and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate heat medium; can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0039] With the development of battery technology, battery devices are applied to more and more fields and gradually replace traditional petrochemical energy in fields such as automobile power. The battery device can store chemical energy and controllably convert the chemical energy into electrical energy. In a recyclable battery device, after discharging, the active material can be activated by charging to continue to be used. During the working process of the battery device, the battery monomer generates heat. If the heat generated by the battery monomer cannot be dissipated in time, the temperature of the battery monomer will rise, and in severe cases, it may cause thermal runaway.

[0040] In the related art, a heat dissipation structure such as a heat dissipation fin, a heat conductive glue, etc. is usually arranged between the bottom plate of the battery device and the battery monomer to improve the heat dissipation efficiency of the battery monomer. However, the heat dissipation area of the heat dissipation plate, the heat conductive glue, etc. is reduced, which leads to poor heat dissipation effect of the battery device and affects the reliability of the battery device.

[0041] Based on the above considerations, the present application provides a battery device and an electric equipment. The battery device comprises at least one battery monomer group, an end plate assembly and a fixing belt. The battery monomer group comprises a plurality of battery monomers arranged in sequence along a first direction. In the same battery monomer group, a first partition plate is arranged between two adjacent battery monomers. The first partition plate is provided with a first air duct. The end plate assembly is arranged along the first direction and is arranged at the end of the at least one battery monomer group. The fixing belt is wrapped around the side of the at least one battery monomer group and the side of the end plate assembly away from the battery monomer group. In this embodiment, the first partition plate provided with the first air duct is arranged between the two adjacent battery monomers in the same battery monomer group, the end plate assembly is arranged at the end of the at least one battery monomer group, and the fixing belt is wrapped around the side of the at least one battery monomer group and the side of the end plate assembly away from the battery monomer group. On the one hand, the arrangement of the first air duct can provide fluid circulation and guide the fluid to flow between the adjacent battery monomers, increase the contact area between the battery monomers and the fluid, expand the heat dissipation area of the battery monomers, and thus improve the heat dissipation efficiency and effect of the battery monomers, and further improve the heat dissipation efficiency and effect of the battery device. On the other hand, the at least one battery monomer group, the end plate assembly and the first partition plate are bundled into one whole body by the fixing belt, which not only can enhance the structural stability and mechanical strength of the battery device, reduce the risk of inclination, shaking or interference of the battery monomer, the end plate assembly and the first partition plate, but also can reduce the area of the side of the battery monomer group and the first air duct blocked by the fixing belt, thereby increasing the air inlet area of the first air duct and the contact area between the side of the battery monomer group and the fluid, and further improving the heat dissipation efficiency and effect of the battery monomer.

[0042] The battery device and the electric equipment disclosed by the embodiments of the present application can be used in various energy storage systems using the battery device as a power source or using the battery device as an energy storage element. The electric equipment can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric aircraft toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0043] The following embodiments are described by taking a vehicle 1000a as an example for convenience of description.

[0044] Please refer to Figure 1 The vehicle 1000a can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle. The vehicle 1000a is internally provided with a battery device 100a, which can be arranged on the chassis of the vehicle 1000a. The battery device 100a can be used for power supply of the vehicle 1000a, for example, the battery device 100a can be used as an operating power source of the vehicle 1000a. The vehicle 1000a can further include a controller 200a and a motor 300a, and the controller 200a is used to control the battery device 100a to supply power to the motor 300a, for example, to meet the power demand of the vehicle 1000a during starting, navigation, and driving.

[0045] In some embodiments of the present application, the battery device 100a can not only be used as an operating power source of the vehicle 1000a, but also be used as a driving power source of the vehicle 1000a, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000a.

[0046] In some embodiments, the battery device 100a can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0047] Please refer to Figure 2 The battery device 100a mentioned in the embodiments of the present application can include one or more battery cell groups 10 for providing voltage and capacity. The battery cell group 10 can include a plurality of battery cells 11 connected in series, in parallel, or in a mixed connection mode through a busbar component.

[0048] In the embodiments of the present application, the battery cell 11 can be a secondary battery, which refers to a battery cell 11 that can be activated by charging after discharging.

[0049] The battery cell 11 can be 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-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0050] In some embodiments, referring to Figures 2 to 4 , the battery device 100a includes at least one battery cell group 10, an end plate assembly 30, and a fixing belt 40. The battery cell group 10 includes a plurality of battery cells 11 arranged in sequence along a first direction X-X. In the same battery cell group 10, a first partition plate 20 is arranged between two adjacent battery cells 11, and the first partition plate 20 is provided with a first air duct 21. The end plate assembly 30 is arranged along the first direction X-X with the battery cell group 10, and is arranged at the end 122 of the at least one battery cell group 10. The fixing belt 40 is wrapped around the side 121 of the at least one battery cell group 10 and the side of the end plate assembly 30 away from the battery cell group 10.

[0051] Among them, the battery cell group 10 includes a plurality of battery cells 11, and the plurality of battery cells 11 are arranged in sequence along the first direction X-X. The plurality of battery cells 11 can be connected in series, parallel or mixed connection through the current collection component. The at least one battery cell group 10 can also be connected in series, parallel or mixed connection through the current collection component.

[0052] In some embodiments, a gap is formed between two adjacent battery cells 11 along the first direction X-X, and the first partition plate 20 is arranged in the gap. One side of the two opposite sides of the first partition plate 20 at least partially abuts against one of the two adjacent battery cells 11, and the other side at least partially abuts against the other of the two adjacent battery cells 11. The first partition plate 20 is provided with a first air duct 21 on both opposite sides along the first direction X-X, and the area corresponding to the first air duct 21 on the side of the battery cell 11 facing the first partition plate 20 can be used as the side wall of the first air duct 21.

[0053] The at least one battery cell group 10 has two side portions 121 and two end portions 122. The side portion 121 is the side portion of the at least one battery cell group 10 as a whole, and the end portion 122 is the end portion of the at least one battery cell group 10 as a whole. When the at least one battery cell group 10 includes one battery cell group 10, the two side portions 121 are located at the two ends of the battery cell group 10 along the second direction Y-Y, and the two end portions 122 are located at the two ends of the battery cell group 10 along the first direction X-X. When the at least one battery cell group 10 includes a plurality of battery cell groups 10, the two side portions 121 are located at the two ends of the plurality of battery cell groups 10 along the second direction Y-Y, and the two end portions 122 are located at the two ends of the plurality of battery cell groups 10 along the first direction X-X. The second direction Y-Y is perpendicular to the first direction X-X.

[0054] The battery device 100a includes two end plate assemblies 30, one of which is arranged at one end 122 of the at least one battery monomer group 10, and the other of which is arranged at the other end 122 of the at least one battery monomer group 10. The end plate assembly 30 can play a role in supporting and protecting the battery monomer 11, and by arranging the end plate assembly 30 at the end 122 of the battery monomer group 10, the structural stability and mechanical strength of the battery device 100a can be enhanced.

[0055] When the fixing band 40 is buckled at the side 121 of the at least one battery monomer group 10 and the side of the end plate assembly 30 facing away from the battery monomer group 10, the at least one battery monomer group 10, the end plate assembly 30, and the first partition plate 20, etc. can be bundled into one whole. The fixing band 40 has a smaller size along the third direction Z-Z, so that the area of the fixing band 40 shielding the side 121 of the battery monomer group 10 and the area of the first air duct 21 are reduced, and the heat dissipation efficiency and effect of the battery monomer 11 can be improved. Wherein, the third direction Z-Z is perpendicular to the first direction X-X and the second direction Y-Y, and parallel to the arrangement direction of the top 124 and the bottom 123 of the battery monomer group 10.

[0056] In some embodiments, the fixing band 40 includes a first sub-fixing band 41 and a second sub-fixing band 42, the first sub-fixing band 41 is buckled at one end of the at least one battery monomer group 10 and the end plate assembly 30 along the third direction Z-Z, and the second sub-fixing band 42 is buckled at the other end of the at least one battery monomer group 10 and the end plate assembly 30 along the third direction Z-Z. By buckling the first sub-fixing band 41 and the second sub-fixing band 42 at the two ends of the at least one battery monomer group 10 and the end plate assembly 30 along the third direction Z-Z, respectively, not only can the fixing strength and fixing effect of the fixing band 40 on the at least one battery monomer group 10, the end plate assembly 30, and the first partition plate 20, etc. be improved, thereby improving the structural stability and mechanical strength of the battery device 100a, but also the area of the fixing band 40 shielding the side 121 of the battery monomer group 10 and the area of the first air duct 21 can be reduced, thereby improving the heat dissipation efficiency and effect of the battery monomer 11.

[0057] The fixing band 40 includes a steel band. The steel band is a narrow strip-shaped packaging material with high tensile strength and certain elongation. By bundling the at least one battery monomer group 10 and the end plate assembly 30 into one whole through the steel band, the structural stability and mechanical strength of the battery device 100a can be further enhanced.

[0058] The first air duct 21 of the first partition plate 20 can be provided for external fluid to pass through to cool the battery monomer 11 through the fluid, wherein the fluid can be cold air or water, and the following embodiments are described taking the fluid as cold air as an example.

[0059] By arranging the first partition 20 provided with the first air duct 21 between two adjacent battery monomers 11 in the same battery monomer group 10, arranging the end plate assembly 30 at the end 122 of at least one battery monomer group 10, and arranging the fixing band 40 around the side 121 of at least one battery monomer group 10 and the side of the end plate assembly 30 away from the battery monomer group 10, on the one hand, the arrangement of the first air duct 21 can provide fluid circulation and guide the fluid to flow between adjacent battery monomer groups 10, increase the contact area between the battery monomer 11 and the fluid, expand the heat dissipation area of the battery monomer 11, thereby improving the heat dissipation efficiency and effect of the battery monomer 11, and further improving the heat dissipation efficiency and effect of the battery device 100a; on the other hand, by fixing the at least one battery monomer group 10, the end plate assembly 30 and the first partition 20 as a whole through the fixing band 40, not only can the structural stability and mechanical strength of the battery device 100a be enhanced, and the risk of inclination, shaking or interference of the battery monomer 11, the end plate assembly 30 and the first partition 20 and the like be reduced, but also the area of the side 121 of the battery monomer group 10 and the first air duct 21 blocked by the fixing band 40 can be reduced, thereby increasing the air inlet area of the first air duct 21 and the contact area between the side 121 of the battery monomer group 10 and the fluid, and further improving the heat dissipation efficiency and effect of the battery monomer 11.

[0060] In some embodiments, referring to Figure 5 , the at least one battery monomer group 10 includes a plurality of battery monomer groups 10, and the plurality of battery monomer groups 10 are arranged in sequence along a second direction Y-Y, and each first partition 20 is located between adjacent two battery monomers 11 in the at least two battery monomer groups 10, wherein the second direction Y-Y is perpendicular to the first direction X-X.

[0061] The plurality of battery monomer groups 10 have two sides 121, and the second direction Y-Y is parallel to the arrangement direction of the two sides 121. The first partition 20 is arranged in extension along the second direction Y-Y. The number of battery monomer groups 10 can be 2, 3, 5, 6, 7, 8, 10, etc., but is not limited thereto. In the plurality of battery monomer groups 10, the number of battery monomers 11 in each battery monomer group 10 can be the same, and the number of battery monomers 11 in the battery monomer group 10 can be 2, 3, 5, 6, 7, 8, 10, 11, 12, etc., but is not limited thereto.

[0062] The battery monomers 11 of the plurality of battery monomer groups 10 correspond to each other in the second direction Y-Y, so that the plurality of battery monomer groups 10 form a plurality of battery monomer columns arranged in the first direction X-X. Each battery monomer column includes a plurality of battery monomers 11 arranged in the second direction Y-Y, and the battery monomers 11 in each battery monomer column are battery monomers 11 in different battery monomer groups 10. The first partition plate 20 is located between two adjacent battery monomer columns, that is, each first partition plate 20 is located between two adjacent battery monomers 11 in at least two battery monomer groups 10.

[0063] In some embodiments, the size of the first partition plate 20 in the second direction Y-Y can be equal to the sum of the sizes of the plurality of battery monomer groups 10 in the second direction Y-Y, the first partition plate 20 is located between two adjacent battery monomers 11 in the plurality of battery monomer groups 10, and the first partition plate 20 extends from one side 121 of the plurality of battery monomer groups 10 to the other side 121 of the plurality of battery monomer groups 10 in the second direction Y-Y.

[0064] In some embodiments, the size of the first partition plate 20 in the second direction Y-Y can also be less than the sum of the sizes of the plurality of battery monomer groups 10 in the second direction Y-Y, the first partition plate 20 is located between two adjacent battery monomers 11 in at least two battery monomer groups 10, and the opposite sides of the first partition plate 20 in the first direction X-X correspond to at least two battery monomers 11 in the second direction Y-Y.

[0065] By arranging each first partition plate 20 between two adjacent battery monomers 11 in at least two battery monomer groups 10, the first partition plate 20 can correspond to the battery monomers 11 of the at least two battery monomer groups 10 in the second direction Y-Y. On the one hand, the number of first partition plates 20 can be reduced, which not only reduces the assembly difficulty of the battery device 100a, saves the assembly time of the battery device 100a, and improves the assembly efficiency of the battery device 100a, but also reduces the material cost of the first partition plate 20, thereby reducing the production cost of the battery device 100a. At the same time, due to the reduction in the number of first partition plates 20, the probability of failure of the first partition plate 20 can be reduced, thereby reducing the maintenance cost caused by the failure of the first partition plate 20. On the other hand, the first partition plate 20 can better fix the battery monomers 11, which helps to enhance the stability and anti-shock performance of the battery device 100a as a whole.

[0066] In some embodiments, please refer to Figures 6 to 7In some embodiments, the battery device 100a includes at least one battery cell group 10, and the battery cell group 10 includes a plurality of battery cell groups 10 arranged in sequence along a second direction Y-Y, wherein the second direction Y-Y is perpendicular to the first direction X-X; and the battery device 100a includes a plurality of first partitions 20 arranged in sequence along the second direction Y-Y, and the plurality of first partitions 20 are respectively arranged between adjacent two battery cells 11 of different battery cell groups 10.

[0067] In some embodiments, each first partition 20 is arranged between adjacent two battery cells 11 of the same battery cell group 10. The number of the plurality of first partitions 20 arranged in sequence along the second direction Y-Y is the same as the number of the battery cell groups 10. For example, when the battery device 100a includes three battery cell groups 10, the number of the first partitions 20 arranged in sequence along the second direction Y-Y is also three, and the three first partitions 20 arranged in sequence along the second direction Y-Y are respectively arranged between adjacent two battery cells 11 of three different battery cell groups 10.

[0068] In some embodiments, the size of the first partition 20 along the second direction Y-Y can be equal to the size of the battery cell 11 along the second direction Y-Y. The first partition 20 extends from one end of the battery cell 11 to the other end of the battery cell 11 along the second direction Y-Y.

[0069] In some embodiments, the size of the first partition 20 along the second direction Y-Y can be smaller than the size of the battery cell 11 along the second direction Y-Y, the first partition 20 can be arranged centrally between adjacent two battery cells 11 of the same battery cell group 10, or the first partition 20 extends from one end of the battery cell 11 towards the other end of the battery cell 11 along the second direction Y-Y.

[0070] By arranging the plurality of first partitions 20 arranged in sequence along the second direction Y-Y between adjacent two battery cells 11 of different battery cell groups 10 respectively, the adjacent two battery cells 11 can correspond to a single first partition 20, so that the battery cell 11 can be cooled more fully, which can not only reduce the risk of overheating of the battery cell 11 in the local area of the battery device 100a due to the accumulation of heat in the local area, but also improve the overall cooling effect of the battery device 100a, and the battery cell 11 can be cooled by the corresponding first partition 20, which can reduce the time length of heat transfer, thereby improving the overall cooling efficiency of the battery device 100a.

[0071] In some embodiments, please refer to Figure 8 The first air duct 21 penetrates from the first end face 221 of the first partition 20 to the second end face 222 of the first partition 20, and the first end face 221 and the second end face 222 are oppositely arranged in the second direction Y-Y.

[0072] The first end surface 221 is a surface of the first partition plate 20 close to one side portion 121 of the plurality of battery cell groups 10, and the second end surface 222 is a surface of the first partition plate 20 close to the other side portion 121 of the plurality of battery cell groups 10.

[0073] In an embodiment, the first end surface 221 and the second end surface 222 are each formed with an air inlet 21a communicating with the first air duct 21, so as to realize that the first air duct 21 penetrates from the first end surface 221 of the first partition plate 20 to the second end surface 222 of the first partition plate 20. External fluid can flow into the first air duct 21 through the air inlet 21a to exchange heat with the battery cell 11.

[0074] By making the first air duct 21 penetrate from the first end surface 221 of the first partition plate 20 to the second end surface 222 of the first partition plate 20, external fluid can flow into the first air duct 21 from both the first end surface 221 and the second end surface 222, which can effectively increase the air inlet area and the air inlet amount, thereby improving the heat dissipation efficiency of the battery cell 11.

[0075] In some embodiments, referring to Figure 8 , the first partition plate 20 is provided with a ventilation groove 23 and a support portion 24 on each of the two sides arranged opposite in the first direction X-X, the support portion 24 abuts against the side of the battery cell 11 facing the first partition plate 20, and the ventilation groove 23 penetrates from the first end surface 221 to the second end surface 222 to form the first air duct 21.

[0076] In some embodiments, the first partition plate 20 includes a first side 20a and a second side 20b arranged opposite in the first direction X-X. One of the first side 20a and the second side 20b protrudes in the direction of the other of the first side 20a and the second side 20b, so as to form the ventilation groove 23 on one of the first side 20a and the second side 20b, and form the support portion 24 on the other of the first side 20a and the second side 20b. When the first side 20a protrudes in the direction of the second side 20b, the ventilation groove 23 is formed on the first side 20a and the support portion 24 is formed on the second side 20b; when the second side 20b protrudes in the direction of the first side 20a, the ventilation groove 23 is formed on the second side 20b and the support portion 24 is formed on the first side 20a.

[0077] In some embodiments, the first side 20a of the first partition plate 20 is formed with one ventilation groove 23 and two support portions 24, the ventilation groove 23 is located between the two support portions 24; the second side 20b of the first partition plate 20 is formed with one support portion 24 and two ventilation grooves 23, the support portion 24 is located between the two ventilation grooves 23. When the first partition plate 20 is arranged between the battery monomers 11 arranged adjacent to each other along the first direction X-X, the arrangement directions of the plurality of first partition plates 20 are the same, in the two first partition plates 20 arranged adjacent to each other along the first direction X-X, the first side 20a of one first partition plate 20 is close to the second side 20b of the other first partition plate 20, so that the ventilation grooves 23 can be uniformly distributed, which is beneficial to uniformly cool the battery monomers 11, can reduce the risk that the local area of the battery device 100a is overheated due to the accumulation of heat in the local area, and can improve the overall heat dissipation effect of the battery device 100a.

[0078] In some embodiments, the first side 20a of the first partition plate 20 is formed with one ventilation groove 23 and two support portions 24, the ventilation groove 23 is located between the two support portions 24; the second side 20b of the first partition plate 20 is formed with one ventilation groove 23 and two support portions 24, the ventilation groove 23 is located between the two support portions 24.

[0079] In some embodiments, the battery device 100a further comprises a heat-conducting member (not shown in the figure), two heat-conducting members are arranged between the side of the support portion 24 facing the battery monomer 11 and the battery monomer 11. The two sides of the heat-conducting member along the first direction X-X respectively abut against the battery monomer 11 and the support portion 24, which can conduct the heat of the battery monomer 11 to the support portion 24, thereby further improving the heat dissipation efficiency of the battery monomer 11.

[0080] By making the support portion 24 abut against the side of the battery monomer 11 facing the first partition plate 20, and the ventilation groove 23 penetrates from the first end face 221 to the second end face 222 to form the first air duct 21, on the one hand, the abutment of the support portion 24 and the side of the battery monomer 11 facing the first partition plate 20 not only can improve the fixing effect of the first partition plate 20 on the battery monomer 11, but also can reduce the risk that the space of the ventilation groove 23 is reduced due to the occupation of the space of the first air duct 21 by the expansion of the battery monomer 11, so that the fluid flow area of the ventilation groove 23 will not be affected by the expansion of the battery monomer 11; on the other hand, the ventilation groove 23 penetrates from the first end face 221 to the second end face 222 to form the first air duct 21, so that the external fluid can flow into the first air duct 21 from the two directions of the first end face 221 and the second end face 222, which can effectively increase the air inlet area and the air inlet amount, thereby improving the heat dissipation efficiency of the battery monomer 11.

[0081] In some embodiments, the ventilation groove 23 comprises a straight groove extending along the second direction Y-Y.

[0082] By setting the ventilation groove 23 as a straight groove, the flow resistance of the fluid can be reduced, the risk of vortex, turbulence and the like of the fluid in the process of flowing in the first air duct 21 is reduced, so as to improve the flow speed of the fluid, and further improve the heat dissipation efficiency of the battery monomer 11.

[0083] In some embodiments, the ventilation groove 23 comprises a curved groove arranged to be curved along the second direction Y-Y, and the inner wall at the corner of the curved groove is smoothly arranged. On the one hand, by setting the ventilation groove 23 as a curved groove, the flow area of the ventilation groove 23 can be increased, the contact area of the battery monomer 11 and the fluid is increased, so as to improve the heat dissipation efficiency and effect of the battery monomer 11; on the other hand, by making the inner wall at the corner of the curved groove smooth, the flow resistance of the fluid can be reduced, so that the fluid can flow smoothly in the first air duct 21, thereby improving the heat dissipation efficiency of the battery monomer 11.

[0084] In some embodiments, at least one reinforcing rib 25 extending along the second direction Y-Y is arranged on the bottom wall of the ventilation groove 23, and the reinforcing rib 25 abuts against the side of the battery monomer 11 facing the first partition plate 20.

[0085] The reinforcing rib 25 divides the ventilation groove 23 into a plurality of sub-grooves 23a, and the plurality of sub-grooves 23a can distribute the airflow flowing into the first air duct 21, so that the first air duct 21 forms a plurality of heat exchange paths, which helps to reduce the local overheating of the battery monomer 11 and improve the heat dissipation effect of the battery monomer 11.

[0086] By making the reinforcing rib 25 arranged on the bottom wall of the ventilation groove 23 extend along the second direction Y-Y and abut against the side of the battery monomer 11 facing the first partition plate 20, the reinforcing rib 25 not only does not damage the flow path of the fluid in the ventilation groove 23, but also enhances the structural strength of the first partition plate 20.

[0087] In some embodiments, please continue to refer to Figures 2 to 6 The battery device 100a further comprises a bottom plate 50 and a first connecting piece 60, the bottom plate 50 is used at least for supporting at least one battery monomer group 10, and the first connecting piece 60 is arranged between the at least one battery monomer group 10 and the bottom plate 50.

[0088] The bottom plate 50 is arranged at the bottom 123 of the battery monomer group 10, and the bottom plate 50 can not only be used for supporting the battery monomer group 10, but also can protect the battery monomer group 10 and reduce the risk of damage to the battery monomer group 10 when the battery device 100a is impacted by the outside. The first connecting piece 60 is used for connecting the battery monomer group 10 and the bottom plate 50.

[0089] By arranging the first connecting member 60 between the battery monomer group 10 and the bottom plate 50, not only the connection strength between the battery monomer group 10 and the bottom plate 50 can be enhanced, the risk of the bottom plate 50 loosening can be reduced, the reliability of the battery device 100a can be effectively improved, but also the vibration resistance and impact resistance of the bottom plate 50 can be improved, and the reliability of the battery device 100a can be further improved.

[0090] In some embodiments, the first connecting member 60 includes a double-sided adhesive connecting member, a heat-conducting adhesive connecting member, or a structural adhesive connecting member.

[0091] The material of the double-sided adhesive connecting member can be epoxy resin, polyimide resin, bismaleimide resin, or phenolic resin, but is not limited thereto. The material of the heat-conducting adhesive connecting member can be epoxy resin, polyimide resin, bismaleimide resin, or phenolic resin, but is not limited thereto. The material of the structural adhesive connecting member can be epoxy resin, polyimide resin, bismaleimide resin, or phenolic resin, but is not limited thereto.

[0092] The double-sided adhesive connecting member, the heat-conducting adhesive connecting member, and the structural adhesive connecting member all have excellent adhesion and aging resistance, so that the first connecting member 60 can maintain adhesion for a long time. Not only the connection strength and durability between the battery monomer group 10 and the bottom plate 50 can be improved, but also the vibration resistance and impact resistance of the bottom plate 50 can be improved. In addition, the heat-conducting adhesive has excellent heat conduction performance, can quickly conduct the heat of the battery monomer group 10 to the bottom plate 50, and can effectively improve the heat dissipation efficiency of the battery monomer group 10.

[0093] In some embodiments, the first connecting member 60 is provided with a second air duct (not shown) on the side facing the battery monomer 11.

[0094] The second air duct can be arranged extending along the second direction Y-Y, or the second air duct can be arranged extending along the first direction X-X, or the second air duct can be arranged extending along the first direction X-X and the second direction Y-Y. When the second air duct is arranged extending along the second direction Y-Y, the second air duct can extend from one end of the first connecting member 60 in the second direction Y-Y to the other end of the first connecting member 60 in the second direction Y-Y. When the second air duct is arranged extending along the first direction X-X, the second air duct can extend from one end of the first connecting member 60 in the first direction X-X to the other end of the first connecting member 60 in the first direction X-X. When the second air duct is arranged extending along the first direction X-X and the second direction Y-Y, a part of the second air duct can extend from one end of the first connecting member 60 in the second direction Y-Y to the other end of the first connecting member 60 in the second direction Y-Y, and the other part can extend from one end of the first connecting member 60 in the first direction X-X to the other end of the first connecting member 60 in the first direction X-X.

[0095] By arranging the second air duct on the side of the first connecting piece 60 facing the battery monomer 11, the heat dissipation effect of the bottom 123 of the battery monomer group 10 can be improved, the risk of heat accumulation in the bottom 123 of the battery monomer group 10 can be reduced, and the reliability of the battery device 100a can be improved.

[0096] In some embodiments, please continue to refer to Figures 5 to 6 The battery device 100a further comprises a second connecting piece 70, which is used to connect two adjacent battery monomers 11 of two adjacent battery monomer groups 10.

[0097] Among them, the battery monomers 11 of the plurality of battery monomer groups 10 correspond one by one in the second direction Y-Y, so that the plurality of battery monomer groups 10 form a plurality of battery monomer columns arranged in the first direction X-X in turn, and the second connecting piece 70 is used to connect two adjacent battery monomers 11 of the battery monomer columns.

[0098] By connecting the two adjacent battery monomers 11 of the two adjacent battery monomer groups 10 through the second connecting piece 70, the connection strength between the two adjacent battery monomers 11 of the two adjacent battery monomer groups 10 can be improved, and the risk of tilting, shaking or interference between the two adjacent battery monomers 11 of the two adjacent battery monomer groups 10 during use or movement of the battery device 100a can be reduced, thereby improving the stability of the battery device 100a.

[0099] In some embodiments, the second connecting piece 70 comprises a double-sided adhesive connecting piece or a structural adhesive connecting piece.

[0100] Among them, the material of the double-sided adhesive connecting piece is epoxy resin, polyimide resin, bismaleimide resin or phenolic resin, but is not limited thereto. The material of the structural adhesive connecting piece is epoxy resin, polyimide resin, bismaleimide resin or phenolic resin, but is not limited thereto.

[0101] The double-sided adhesive connecting piece and the structural adhesive connecting piece both have excellent bonding performance and aging resistance, so that the second connecting piece 70 can maintain adhesion for a long time, the connection strength and durability between the two adjacent battery monomers 11 of the two adjacent battery monomer groups 10 can be improved, and the risk of tilting, shaking or interference between the two adjacent battery monomers 11 of the two adjacent battery monomer groups 10 during use or movement of the battery device 100a can be reduced, thereby improving the stability of the battery device 100a.

[0102] In some embodiments, please refer to Figure 9The battery device 100a further comprises a second partition plate 80, which is arranged between two adjacent battery cell groups 10 to form a third air channel (not shown in the figure) between the two adjacent battery cell groups 10.

[0103] When the battery device 100a comprises a plurality of first partition plates 20 arranged in the second direction Y-Y in sequence, and the plurality of first partition plates 20 are arranged between adjacent two battery cells 11 of different battery cell groups 10, there is no first partition plate 20 between the two adjacent battery cell groups 10, and at this time, the second partition plate 80 can be arranged between the two adjacent battery cell groups 10.

[0104] In some embodiments, the second partition plate 80 has a frame structure. The second partition plate 80 comprises two first edges 81 arranged opposite in the first direction X-X and two second edges 82 arranged opposite in the third direction Z-Z. The two first edges 81 are both arranged to extend in the third direction Z-Z, and the two second edges 82 are both arranged to extend in the first direction X-X. The two first edges 81 are both connected between the two second edges 82, and one of the two first edges 81 is connected to one end of the two second edges 82 in the first direction X-X, and the other of the two first edges 81 is connected to the other end of the two second edges 82 in the first direction X-X. A third air channel is formed in the region between the two first edges 81 and the two second edges 82, and the third air channel can be in communication with the first air channel 21 of the first partition plate 20.

[0105] By arranging the second partition plate 80 between the two adjacent battery cell groups 10 to form a third air channel between the two adjacent battery cell groups 10, the heat generated by the battery cells 11 can be dissipated from between the two adjacent battery cell groups 10, and the heat dissipation efficiency and effect of the battery device 100a can be further improved.

[0106] In some embodiments, the battery device 100a further comprises a collection assembly 91 and a cover plate 92. The collection assembly 91 is arranged on the top 124 of at least one battery cell group 10 and is electrically connected to the battery cells 11. The cover plate 92 is arranged on the side of the collection assembly 91 away from the battery cells 11.

[0107] The collection assembly 91 is used to collect voltage, current, temperature and other parameter information of the battery cells 11, so as to monitor the state of the battery cells 11, facilitate the timely discovery of abnormal conditions such as overcharging, overdischarging and overheating, and take measures such as cutting off the charging and discharging circuit, heat dissipation or pressure relief according to the state of the battery cells 11, so as to improve the reliability of the battery device 100a.

[0108] The cover plate 92 is arranged on the top 124 of the battery cell group 10 to protect the battery cells 11, the collection assembly 91 and other components.

[0109] By arranging the cover plate 92 on the side of the collection assembly 91 away from the battery monomer 11, the probability of impurities such as dust and liquid contacting the collection assembly 91 and the top 124 of the battery monomer group 10 can be reduced, the risk of failure of the collection assembly 91 and the battery monomer group 10 can be reduced, and the reliability of the battery device 100a can be improved.

[0110] In some embodiments, as shown in Figures 2 to 5 The battery device 100a includes at least one battery monomer group 10, an end plate assembly 30, a fixing belt 40, a bottom plate 50, a first connecting piece 60, and a second connecting piece 70. The battery monomer group 10 includes a plurality of battery monomers 11 arranged in a first direction X-X. In the same battery monomer group 10, a first partition plate 20 is arranged between two adjacent battery monomers 11, and the first partition plate 20 is provided with a first air duct 21. The end plate assembly 30 is arranged along the first direction X-X with the battery monomer group 10 and is arranged at the end 122 of the at least one battery monomer group 10. The fixing belt 40 is arranged around the side 121 of the at least one battery monomer group 10 and the side of the end plate assembly 30 away from the battery monomer group 10. The bottom plate 50 is used to support at least one battery monomer group 10. The first connecting piece 60 is arranged between the at least one battery monomer group 10 and the bottom plate 50. The second connecting piece 70 is used to connect two adjacent battery monomers 11 of two adjacent battery monomer groups 10.

[0111] The at least one battery monomer group 10 includes a plurality of battery monomer groups 10 arranged in a second direction Y-Y. Each first partition plate 20 is located between two adjacent battery monomers 11 in the at least two battery monomer groups 10. The first air duct 21 penetrates from a first end surface 221 of the first partition plate 20 to a second end surface 222 of the first partition plate 20. The first end surface 221 and the second end surface 222 are oppositely arranged in the second direction Y-Y.

[0112] The first partition plate 20 is provided with a ventilation groove 23 and a support portion 24 on both sides of the first partition plate 20 arranged in the first direction X-X. The support portion 24 abuts against the side of the battery monomer 11 facing the first partition plate 20. The ventilation groove 23 penetrates from the first end surface 221 to the second end surface 222 to form the first air duct 21.

[0113] The application further provides a power consuming device including the battery device 100a of any of the above embodiments. The power consuming device provided by the application adopts all the technical solutions of the above battery device 100a embodiments, and thus has all the technical effects brought by the technical solutions of the above battery device 100a embodiments.

[0114] According to some embodiments of the present application, the battery device 100a described above can be used on an electrical equipment. In this way, by arranging the first partition 20 provided with the first air duct 21 between two adjacent battery monomers 11 in the same battery monomer group 10, arranging the end plate assembly 30 at the end 122 of at least one battery monomer group 10, and arranging the fixing band 40 around the side 121 of at least one battery monomer group 10 and the side of the end plate assembly 30 away from the battery monomer group 10, on the one hand, the arrangement of the first air duct 21 can provide fluid circulation and guide the fluid to flow between the adjacent battery monomers 11, increase the contact area between the battery monomer 11 and the fluid, and expand the heat dissipation area of the battery monomer 11, thereby improving the heat dissipation efficiency and effect of the battery monomer 11, and further improving the heat dissipation efficiency and effect of the battery device 100a; on the other hand, by bundling at least one battery monomer group 10, end plate assembly 30, first partition 20, etc. into a whole through the fixing band 40, not only can the structural stability and mechanical strength of the battery device 100a be enhanced, and the risk of inclination, shaking or interference of the battery monomer 11, end plate assembly 30, first partition 20, etc. be reduced, but also the area of the side 121 of the battery monomer group 10 and the first air duct 21 blocked by the fixing band 40 can be reduced, thereby increasing the air inlet area of the first air duct 21 and the contact area between the side 121 of the battery monomer group 10 and the fluid, and further improving the heat dissipation efficiency and effect of the battery monomer 11.

[0115] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, each technical feature 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 by, The battery device comprises: at least one battery cell group comprising a plurality of battery cells arranged in sequence along a first direction, and a first partition plate arranged between two adjacent battery cells in the same battery cell group; an end plate assembly arranged along the first direction and arranged at an end of the at least one battery cell group; a fixing band arranged at a side of the at least one battery cell group and a side of the end plate assembly away from the battery cell group.

2. The battery device according to claim 1, characterized by The at least one battery cell group comprises a plurality of battery cell groups arranged in sequence along a second direction, and each first partition plate is arranged between two adjacent battery cells in at least two battery cell groups, wherein the second direction is perpendicular to the first direction.

3. The battery device of claim 1, wherein The at least one battery cell group comprises a plurality of battery cell groups arranged in sequence along a second direction, wherein the second direction is perpendicular to the first direction. The battery device comprises a plurality of first partition plates arranged in sequence along the second direction, and each first partition plate is arranged between two adjacent battery cells in different battery cell groups.

4. The battery device according to claim 2 or 3, characterized by The first air channel penetrates from a first end surface of the first partition plate to a second end surface of the first partition plate, and the first end surface and the second end surface are oppositely arranged in the second direction.

5. The battery device of claim 4, wherein, The first partition plate is provided with a ventilation groove and a support portion on both sides oppositely arranged along the first direction, the support portion abuts against a side of the battery cell facing the first partition plate, and the ventilation groove penetrates from the first end surface to the second end surface to form the first air channel.

6. The battery device of claim 5, wherein, The ventilation groove comprises a straight groove arranged along the second direction.

7. The battery device of claim 5, wherein The bottom wall of the ventilation groove is provided with at least one reinforcing rib arranged along the second direction, and the reinforcing rib abuts against the side of the battery cell facing the first partition plate.

8. The battery device of claim 1, wherein The battery device further comprises: a bottom plate for supporting the at least one battery cell group; a first connecting member arranged between the at least one battery cell group and the bottom plate.

9. The battery device of claim 8, wherein, The first connecting member comprises a double-sided adhesive connecting member, a heat-conducting adhesive connecting member or a structural adhesive connecting member.

10. The battery device of claim 8, wherein, A second air channel is arranged on a side of the first connecting member facing the battery cell.

11. The battery device according to claim 2 or 3, characterized by The battery device further comprises a second connecting member for connecting two adjacent battery cells of two adjacent battery cell groups.

12. The battery device of claim 11, wherein, The second connecting member comprises a double-sided adhesive connecting member or a structural adhesive connecting member.

13. The battery device of claim 3, wherein The battery device further comprises a second partition plate arranged between two adjacent battery cell groups to form a third air channel between the two adjacent battery cell groups.

14. The battery device of claim 1, wherein, The battery device further comprises: a collection assembly arranged at a top of the at least one battery cell group, and the collection assembly is electrically connected to the battery cell; a cover plate arranged at a side of the collection assembly away from the battery cell.

15. An electrical device, characterized by The battery device comprises any one of the battery devices according to claims 1 to 14.

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