Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, the battery device comprises a battery monomer group, a box body, two side beams, a pressing strip and an electric element, the two opposite ends of the pressing strip along a first direction are respectively connected to the two side beams, at least one side beam comprises a body and a cushion block fixed on the body, and the cushion block is fixed on the body. The surface of one side, facing the pressing strip in the height direction, of the body forms a mounting surface, the cushion block protrudes out of the mounting surface in the height direction, the pressing strip is fixed to the cushion block, and the electrical element is electrically connected with the battery monomer group and arranged on one side, facing the pressing strip in the height direction, of the body. According to the battery device and the electric equipment, at least one side beam is fixedly connected with the pressing strip through the cushion block protruding out of the body, so that the height of the body of the side beam can be reduced while the fixing requirement of the pressing strip is met, the electrical gap and the creepage distance of an electrical element are increased, and the service life of the electrical element is prolonged. Therefore, the energy density is improved and the working requirement of a high-voltage system is met.

Description

Technical Field

[0001] The embodiments of this application relate to the field of battery technology, and more particularly to a battery device and an electrical appliance. Background Technology

[0002] Battery devices can be used to store or provide electrical energy, and they can be used in electrical equipment, such as vehicles. Taking vehicles as an example, in a vehicle equipped with a battery device, the battery device can provide all or part of the power.

[0003] Currently, there are high energy density and fast charging requirements for battery devices. In order to improve energy density, it is necessary to save as much internal space as possible for battery devices. However, the high voltage system required for fast charging places higher demands on electrical clearance and creepage distance. How to improve energy density while taking into account the requirements of electrical clearance and creepage distance has become an urgent problem to be solved in this field. Utility Model Content

[0004] In view of this, the embodiments of this application aim to provide a battery device and electrical equipment that can improve energy density while meeting the requirements of electrical clearance and creepage distance.

[0005] The first aspect of this application provides a battery device, the battery device comprising: a housing having a receiving space; a battery cell group including a plurality of battery cells stacked along a first direction, the battery cell group being housed within the receiving space; two side beams respectively disposed on opposite sides of the battery cell group along the first direction, both side beams abutting against the battery cell group; a pressure strip disposed on one side of the battery cell along the height direction, the pressure strip being connected to the two side beams at opposite ends along the first direction, the first direction intersecting the height direction, wherein at least one side beam includes a body and a pad fixed to the body, the surface of the body facing the pressure strip along the height direction is formed as a mounting surface, the pad protrudes from the mounting surface along the height direction, the pressure strip is fixed to the pad, and an electrical component electrically connected to the battery cell group and disposed on the side of the body facing the pressure strip along the height direction.

[0006] In the battery device of this application embodiment, at least one side beam is fixedly connected to the pressure strip via a pad protruding from the main body. This satisfies the need for fixing the pressure strip while reducing the height of the side beam body, thereby saving internal space in the battery device and increasing energy density. Furthermore, the reduced height of the main body increases the distance along the height direction between the mounting surface of the main body and the terminal end face of the battery cell, improving the electrical clearance and creepage distance between the terminal and / or electrical components connected to the battery cell assembly and the main body, thus meeting the requirements for high-voltage operation.

[0007] In some embodiments, the electrical component includes a high-voltage output component electrically connected to the battery cell pack, the high-voltage output component and the mounting surface being disposed opposite to and spaced apart along the height direction.

[0008] In this embodiment, the high-voltage output component of the battery device is positioned opposite and spaced apart from the mounting surface along the height direction. This improves the electrical clearance and creepage distance between the high-voltage output component and the main body, thereby meeting the requirements of high-voltage operation and enhancing the insulation reliability of the battery device during high-voltage operation.

[0009] In some embodiments, the battery device includes an output electrode base disposed on the mounting surface and distributed along a second direction with the pad, and the high-voltage output component is insulatedly connected to the output electrode base. The first direction intersects the second direction, and both the first direction and the second direction are perpendicular to the height direction of the battery cell.

[0010] In this embodiment, the output electrode base is disposed on the mounting surface of the main body. This helps to fully utilize the space on the side of the main body facing the pressure bar along the height direction, improving structural compactness and thus increasing energy density. On the other hand, it helps to fully utilize the distance between the mounting surface and the terminal end face of the battery cell along the height direction (i.e., the distance between the mounting surface and the high-voltage output component), increasing the creepage distance between the high-voltage output component and the main body, thereby improving the insulation reliability of the battery device during high-voltage operation.

[0011] In some embodiments, the pad has a main body and at least one clearance portion connected to the main body, the main body protruding from the clearance portion, the pressure strip connected to the main body, and the high-pressure output member and the clearance portion being disposed opposite to and spaced apart along the height direction.

[0012] In this embodiment, the pad is configured to include a main body and a clearance part, so as to reduce the possibility of interference between the pad and the high-voltage output component while meeting the fixed strength requirements.

[0013] In some embodiments, the main body portion is provided with a clearance portion on each of its opposite sides along the second direction, and / or the main body portion has at least one first mating structure for connecting with the pressure strip, and the clearance portion has at least one second mating structure for connecting with the body, the first direction intersects the second direction, and both the first direction and the second direction are perpendicular to the height direction of the battery cell.

[0014] In this embodiment, the spacer block is generally formed into a "convex" - shaped structure. The middle convex part along the second direction is the main body part and is connected to the pressing strip, and the two sunken parts on both sides are the avoidance parts and are connected to the main body. This connection method helps to optimize the stress distribution of the spacer block, improve the fixing strength between the spacer block and the pressing strip and the main body, and further improve the anti - deformation ability of the side beam.

[0015] In some embodiments, the battery device includes a low - voltage connector. The low - voltage connector is arranged on the mounting surface and is distributed with the spacer block along the second direction. The first direction intersects with the second direction, and both the first direction and the second direction are perpendicular to the height direction of the battery cell.

[0016] In this embodiment, the low - voltage connector is arranged on the mounting surface of the main body. Thus, it helps to further save space and meet the creepage distance and electrical clearance requirements of the low - voltage system.

[0017] In some embodiments, the battery device includes a plurality of the pressing strips arranged at intervals along the second direction. At least one of the side beams includes a plurality of the spacer blocks arranged at intervals along the second direction on the mounting surface. Each spacer block is connected to one pressing strip. The first direction intersects with the second direction, and both the first direction and the second direction are perpendicular to the height direction.

[0018] In this embodiment, arranging a plurality of pressing strips helps to further improve the anti - deformation ability of the side beam. Further, through the plurality of spacer blocks arranged at intervals, while meeting the working requirements of the plurality of pressing strips, the occupation of space by the spacer blocks can be reduced, enabling more electrical components to be arranged on the mounting surface of the main body, thus helping to improve the energy density.

[0019] In some embodiments, the box body includes a box main body which has an accommodation space. The side beam and the battery cell group are arranged in the accommodation space.

[0020] In this embodiment, the side beam is arranged inside the box main body instead of being formed as the outer wall of the box body. Thus, the influence of the reduction of the height of the side beam main body on the structural strength of the box body can be reduced, and the use reliability of the battery device can be improved.

[0021] In some embodiments, the side beam includes fasteners, and the pressing strip and the spacer block are fixedly connected through the fasteners.

[0022] In this embodiment, this fixing method helps to reduce the influence of the manufacturing tolerances of the main body and the spacer block on the shape of the pressing strip, enables the pressing strip to maintain the desired shape, optimizes the stress distribution of the force - transmission structure formed by the pressing strip and the side beam, and thus further improves the anti - deformation ability.

[0023] In some embodiments, the pad is fixedly connected to the body by the fastener.

[0024] In this embodiment, the pressure strip and the pad block, as well as the pad block and the body, are fixedly connected by fasteners, which helps to further reduce the impact of manufacturing tolerances.

[0025] A second aspect of this application provides an electrical device that includes the battery device described in the first aspect of this application.

[0026] The electrical device of this application embodiment has all the advantages of the battery device described in any of the above embodiments, and will not be repeated here. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the battery device according to an embodiment of this application;

[0029] Figure 3 This is an exploded perspective view of the battery device according to an embodiment of this application;

[0030] Figure 4 This is a schematic diagram of the structure of the box according to an embodiment of this application;

[0031] Figure 5 This is a schematic diagram of the structure of the pressure strip according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the structure of the pad block according to an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures

[0034] 1000, Vehicle; 100, Battery Unit; 10, Battery Cell Pack; 11, Battery Cell; 20, Housing; 21, Side Beam; 211, Body; 211a, Mounting Surface; 211b, Second Mounting Hole; 212, Pad; 2121, Main Body; 2122, Clearance Part; 2123, First Mating Structure; 2124, Second Mating Structure; 213, Fastener; 22, Housing Body; 22a, Accommodation Space; 30, Pressure Strip; 30a, First Mounting Hole; 40, High Voltage Output Component; 50, Output Terminal Base; 60, Low Voltage Connector; 200, Controller; 300, Motor; L1, First Direction; L2, Second Direction; L3, Height Direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0037] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0038] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0039] In the description of this application, the orientation or positional relationship of "first direction", "second direction" and "height direction" are based on the orientation or positional relationship shown in the accompanying drawings. Among them, "first direction" is the direction indicated by arrow L1 in the accompanying drawings, "second direction" is the direction indicated by arrow L2 in the accompanying drawings, and "height direction" is the direction indicated by arrow L3 in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0043] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0044] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0045] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0046] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0047] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0048] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0049] In some implementations, the electrode assembly is a stacked structure.

[0050] For example, multiple positive and negative electrodes can be provided, and multiple positive and multiple negative electrodes can be stacked alternately.

[0051] For example, multiple positive electrode sheets can be provided, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0052] For example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0053] For example, multiple separators may be provided, each disposed between any adjacent positive or negative electrode plates.

[0054] For example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0055] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0056] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0057] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. Exemplarily, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly for encapsulating the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0058] For example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0059] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0060] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0061] Battery devices have high energy density and fast charging requirements. High energy density limits the installation space of electrical modules inside the battery device, while the high voltage system required for fast charging places higher demands on the electrical clearance and creepage distance of the electrical modules. It is difficult to meet both the high energy density and high voltage fast charging requirements in related technologies.

[0062] Specifically, this application proposes that, in related technologies, a pressure strip disposed on the top side of the battery cell is used to connect the two side beams of the battery pack housing to meet the anti-expansion force requirements of the side beams. The pressure strip is generally designed with a nearly flat shape. This characteristic causes the fixed position of the pressure strip to be roughly flush with the shoulder of the battery cell. Therefore, the height of the side beam needs to be similar to the shoulder height of the battery cell.

[0063] The aforementioned height restriction of the side beam compresses the internal space of the battery device, which is not conducive to improving the energy density of the battery device. Furthermore, it makes it impossible to freely adjust the gap between the side beam and components such as the terminal posts and busbars of the battery cells, which may not meet the electrical clearance and creepage distance requirements of high-voltage systems.

[0064] In view of this, a battery device according to an embodiment of this application is proposed. The battery device according to an embodiment of this application includes a housing, a battery cell assembly, two side beams, a pressure strip, and electrical components. The housing forms a receiving space. The battery cell assembly includes a plurality of battery cells stacked along a first direction and is housed within the receiving space. The two side beams are respectively disposed on opposite sides of the battery cell assembly along the first direction, and both side beams abut against the battery cell assembly. The pressure strip is disposed on one side of the battery cell along the height direction, and the opposite ends of the pressure strip along the first direction are respectively connected to the two side beams. The first direction intersects with the height direction. At least one side beam includes a body and a pad fixed to the body. The surface of the body facing the pressure strip along the height direction is formed as a mounting surface. The pad protrudes from the mounting surface along the height direction, and the pressure strip is fixed to the pad. The electrical components are electrically connected to the battery cell assembly and are disposed on the side of the body facing the pressure strip along the height direction.

[0065] In the battery device of this application embodiment, at least one side beam is fixedly connected to the pressure strip via a pad protruding from the main body. This satisfies the need for fixing the pressure strip while reducing the height of the side beam body, thereby saving internal space in the battery device and increasing energy density. Furthermore, the reduced height of the main body increases the distance between the main body and the battery cell's terminals along the height direction, improving the electrical clearance and creepage distance between the terminals and / or electrical components connected to the battery cell assembly and the main body, thus meeting the operating requirements of high-voltage systems.

[0066] The technical solutions described in the embodiments of this application are applicable to electrical devices that use battery devices. The electrical devices include the battery devices of any embodiment of this application, and the battery devices are used to provide electrical energy.

[0067] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0068] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0069] Reference Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0070] Reference Figures 2-6 The battery device 100 of this application embodiment includes a battery cell assembly 10, a housing 20, and a pressure strip 30. The battery cell assembly 10 includes a plurality of battery cells 11 stacked along a first direction. The housing 20 includes two side beams 21 arranged opposite to each other along the first direction. The two side beams 21 are used to constrain the battery cell assembly 10. The pressure strip 30 is disposed on one side of the battery cell 11 along the height direction. The two opposite ends of the pressure strip 30 along the first direction are respectively connected to the two side beams 21. The first direction intersects the height direction. At least one side beam 21 includes a body 211 and a pad 212 fixed to the body 211. The side surface of the body 211 facing the pressure strip 30 along the height direction is formed as a mounting surface 211a. The pad 212 protrudes from the mounting surface 211a along the height direction. The pressure strip 30 is fixed to the pad 212.

[0071] Please refer to Figure 2 The battery device 100 includes a housing 20 and a battery cell pack 10. The housing 20 forms a receiving space, and the battery cell pack 10 is disposed in the receiving space.

[0072] The enclosure 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure 20 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0073] The housing 20 is used to encapsulate the battery cell 11. The housing 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11.

[0074] For example, the box 20 is typically a cuboid structure, with both its length and width directions parallel to the horizontal plane. The length direction of the box 20 is parallel to the longest side of its cuboid structure. The height direction of the box 20 is perpendicular to the ground.

[0075] The battery cell assembly 10 includes a plurality of battery cells 11 stacked along a first direction. Exemplarily, the first direction is perpendicular to the large surface of the battery cell 11, where the large surface specifically refers to the surface with the largest area among all surfaces of the battery cell 11. Taking the housing 20 as a cuboid structure as an example, the first direction can be either the length direction of the housing 20 or the width direction of the housing 20.

[0076] The battery device 100 may include one or more battery cell groups 10. When the battery device 100 includes multiple battery cell groups 10, the multiple battery cell groups 10 are distributed along a second direction to form an array of battery cells 11. Here, the second direction intersects with the first direction, and both the first and second directions are perpendicular to the height direction of the housing 20. For example, the first direction is the length direction of the housing 20, and the second direction is the width direction of the housing 20.

[0077] The battery device 100 also includes two side beams 21, which are respectively disposed on opposite sides of the battery cell assembly 10 along the first direction, and both side beams 21 abut against the battery cell assembly 10. The side beams 21 are used to constrain the battery cell assembly 10 along the first direction and to bear the expansion force from the battery cells 11. In related technologies, these side beams 21 are usually referred to as expansion beams.

[0078] The side beam 21 can directly or indirectly abut against the battery cell 11, without any restriction.

[0079] exist Figures 2-4 In the illustrated embodiment, the housing 20 includes a main body 22 with a receiving space 22a, and side beams 21 and battery cell packs 10 are disposed within the receiving space 22a. However, those skilled in the art will understand that the structure of the housing 20 is not limited to this. For example, in some other embodiments, the housing 20 may include a first housing and a second housing, which enclose the receiving space.

[0080] Reference Figure 2 , Figure 3 and Figure 5 The battery device 100 also includes a pressure strip 30, which is disposed on one side of the battery cell 11 along the height direction, and the two opposite ends of the pressure strip 30 along the first direction are respectively connected to two side beams 21.

[0081] It is understood that the pressure strip 30 can cooperate with the two side beams 21 to form a stable force transmission structure, thereby improving the deformation resistance of the two side beams 21. In addition, the pressure strip 30 can also constrain the battery cell 11 and / or electrical components (such as busbars) connected to the battery cell 11 in the height direction.

[0082] The specific structural form of the pressure strip 30 is not limited; for example, the pressure strip 30 is set as a flat strip structure. The specific material of the pressure strip 30 is not limited, such as metal, plastic or fiber composite material, as long as it can meet the structural strength and insulation requirements.

[0083] For example, the pressure strip 30 is disposed on the electrode post side of the battery cell 11. In the orthographic projection along the height direction, the projection of the pressure strip 30 covers at least a portion of the shoulder area of ​​the battery cell 11, and the projection of the pressure strip 30 is offset from the projection of the electrode post of the battery cell 11.

[0084] Here, the shoulder region of the battery cell 11 specifically refers to the region between the terminal post of the battery cell 11 and the outer edge of the casing of the battery cell 11. For example, the battery cell 11 has two terminals along a second direction, and the two terminals are formed into two shoulder regions along the outer side of the second direction.

[0085] The number of pressure strips 30 can be one or more. In embodiments where the number of pressure strips 30 is multiple, the multiple pressure strips 30 can be spaced apart along the second direction.

[0086] In an embodiment where the battery device 100 includes a plurality of battery cell groups 10 distributed along a second direction, the projection of a pressure strip 30 can simultaneously cover the shoulder regions of battery cells 11 in two adjacent battery cell groups 10 along the second direction. Further, in this embodiment, the shoulder regions of battery cells 11 in each battery cell group 10 can all be covered by the pressure strip 30, or only a portion of the shoulder regions of battery cells 11 in some battery cell groups 10 can be covered by the pressure strip 30. Here, the covering of the shoulder regions of battery cells 11 by the pressure strip 30 can be one shoulder region covered, or both shoulder regions can be covered by the pressure strip 30.

[0087] Reference Figure 2 , Figure 3 and Figure 6 In this embodiment, at least one side beam 21 includes a body 211 and a pad 212 fixed to the body 211.

[0088] Here, the main body 211 is the main structure of the side beam 21. In other words, it is the main structure used to realize the anti-expansion force function of the side beam 21. The specific structural form of the main body 211 is not limited.

[0089] The surface of the body 211 facing the pressure strip 30 along the height direction is formed as a mounting surface 211a. The pad 212 protrudes from the mounting surface 211a along the height direction. The pressure strip 30 is fixed to the pad 212, for example, fixed to the surface of the pad 212 facing away from the body 211 along the height direction.

[0090] Here, mounting surface 211a specifically refers to the surface of the body 211 facing the pressure strip 30 along the height direction, which is not covered by the pad 212. In other words, in the orthographic projection along the height direction, the projection of the pad 212 and the projection of the mounting surface 211a are offset from each other. The mounting surface 211a can be used to install electrical components. Those skilled in the art can install any suitable electrical component on the mounting surface 211a according to actual usage requirements. This embodiment does not impose any restrictions on this.

[0091] The specific structural form of the pad 212 is not limited, as long as it can meet the fixing requirements of the pressure strip 30. As mentioned above, there can be multiple pressure strips 30. In this case, one pad 212 can be fixedly connected to one pressure strip 30, or one pad 212 can be fixedly connected to multiple pressure strips 30. There is no restriction on this.

[0092] The method of fixing the pad 212 to the body 211 is not limited. For example, it can be fixed to the body 211 by welding, fastening structure (such as bolts, screws, etc.), snap-fit, etc. Alternatively, the pad 212 can be integrated with the body 211.

[0093] The fixing method of the pad 212 and the pressure strip 30 is not limited. For example, it can be fixed to the pad 212 by welding, bonding, snap-fitting, fastening structure (such as bolts, screws, etc.).

[0094] The battery device 100 also includes electrical components that are electrically connected to the battery cell pack 10 and are disposed on the side of the body 211 facing the pressure strip 30 along the height direction. Here, the specific type of electrical component is not limited; there may be one or more electrical components. The electrical components may be mounted on the mounting surface 211a, or they may be spaced apart from the mounting surface 211a along the height direction. This application does not impose any restrictions on this.

[0095] It is understandable that if the spacer 212 is not provided, in order to meet the fixing requirements of the pressure strip 30, the side surface of the side beam 21 facing the pressure strip 30 along the height direction needs to be roughly flush with the shoulder area of ​​the battery cell 11. This will result in the space on the side of the side beam 21 facing the pressure strip 30 along the height direction being compressed, which may require increasing the dimensions of the housing 20 along the height direction to meet the installation space requirements of the relevant electrical components, resulting in a decrease in the energy density of the battery device 100. In addition, the fact that the side surface of the side beam 21 facing the pressure strip 30 along the height direction is roughly flush with the shoulder area of ​​the battery cell 11 will compress the distance between the end face of the terminal connected to the battery cell 11 and the side surface of the side beam 21 along the height direction into a smaller range, which may make it difficult to meet the electrical clearance and creepage distance requirements of the electrical components connected to the terminal and / or the electrical components connected to the terminal when operating at high voltage.

[0096] In this embodiment, at least one side beam 21 is fixedly connected to the pressure strip 30 via a pad 212 protruding from the body 211. This satisfies the need for fixing the pressure strip 30 while reducing the height of the body 211 of the side beam 21, thereby saving internal space in the battery device 100 and increasing energy density. Furthermore, the reduced height of the body 211 increases the distance along the height direction between the mounting surface 211a of the body 211 and the terminal end face of the battery cell 11, improving the electrical clearance and creepage distance between the terminal and / or the electrical components connected to the terminal and the body 211, thus meeting the requirements for high-voltage operation.

[0097] It should be noted that in this embodiment, only one of the two side beams 21 may adopt the above-described structural form, or both side beams 21 may adopt the above-described structural form. Those skilled in the art can make reasonable choices based on the layout requirements of the relevant electrical components.

[0098] In some embodiments, refer to Figure 2 and Figure 3 The electrical components include a high-voltage output component 40 that is electrically connected to the battery cell pack 10. The high-voltage output component 40 and the mounting surface 211a are arranged opposite to each other and spaced apart along the height direction.

[0099] Here, the high-voltage output component 40 specifically refers to a structure used to collect and boost the current from each battery cell 11 of the battery device 100 before outputting it externally. Simultaneously, the high-voltage output component 40 also serves as an input function during charging, particularly during high-voltage fast charging. The specific structural form of the high-voltage output component 40 can be found in relevant technologies in the art, and this application does not impose any limitations on it. For example, the high-voltage output component 40 includes a high-voltage switch.

[0100] In this embodiment, the high-voltage output component 40 of the battery device 100 is positioned opposite and spaced apart from the mounting surface 211a along the height direction. This improves the electrical clearance and creepage distance between the high-voltage output component 40 and the body 211, thereby meeting the requirements of high-voltage operation and enhancing the insulation reliability of the battery device 100 during high-voltage operation.

[0101] In some embodiments, refer to Figure 2 The battery device 100 includes an output electrode base 50, which is disposed on the mounting surface 211a and distributed with the pad 212 along the second direction. The high voltage output component 40 is insulatedly connected to the output electrode base 50. The first direction and the second direction intersect, and both the first direction and the second direction are perpendicular to the height direction of the battery cell 11.

[0102] Here, the output pole base 50 specifically refers to the insulating base used to support and fix the high voltage output component 40. The specific structural form of the output pole base 50 is not limited, as long as it can meet the connection requirements of the high voltage output component 40.

[0103] In this embodiment, the output electrode base 50 is disposed on the mounting surface 211a of the main body 211. This helps to fully utilize the space on the side of the main body 211 facing the pressure strip 30 along the height direction, improving structural compactness and thus increasing energy density. On the other hand, it helps to fully utilize the distance between the mounting surface 211a and the terminal end face of the battery cell 11 along the height direction (that is, the distance between the mounting surface 211a and the high-voltage output component 40), increasing the creepage distance between the high-voltage output component 40 and the main body 211, thereby improving the insulation reliability of the battery device 100 during high-voltage operation.

[0104] Of course, in some other embodiments, the high-voltage output component 40 can be connected to the pad 212, that is, the pad 212 is configured as the output electrode base 50 of the high-voltage output component 40. However, it is understood that the pad 212 is fixed to both the side beam 21 and the pressure strip 30, and is part of the force transmission structure, making it relatively susceptible to deformation under expansion forces. In comparison, using an independent output electrode base 50 helps reduce the impact of expansion deformation on the high-voltage output component 40, further improving the reliability of the battery device 100.

[0105] In some embodiments, refer to Figure 2 and 6 The pad 212 has a main body 2121 and at least one clearance portion 2122 connected to the main body 2121. The main body 2121 protrudes from the clearance portion 2122. The pressure strip 30 is connected to the main body 2121. The high-voltage output member 40 is opposite to the clearance portion 2122 in the height direction and is spaced apart.

[0106] Here, the specific structural forms of the main body portion 2121 and the avoidance portion 2122 are not limited, as long as they can meet the connection requirements of the pressure strip 30 and the avoidance requirements of the high-voltage output component 40.

[0107] As mentioned above, the pressure strip 30 usually covers the shoulder area of the battery cell 11, while the high-voltage output component 40 is connected to the pole of the battery cell 11. This makes the distance between the pressure strip 30 and the high-voltage output component 40 along the second direction relatively small. In order to improve the fixing strength, it is necessary for the spacer block 212 to have a large contact area with the pressure strip 30 and the main body 211, which may cause interference between the spacer block 212 and the high-voltage output component 40.

[0108] In this embodiment, the spacer block 212 is provided with a main body portion 2121 and an avoidance portion 2122. In this way, the possibility of interference between the spacer block 212 and the high-voltage output component 40 can be reduced while meeting the fixing strength requirements.

[0109] Of course, in some other embodiments, the possibility of interference between the spacer block 212 and the high-voltage output component 40 can also be reduced by reducing the size of the spacer block 212 along the second direction.

[0110] In some embodiments, referring to Figure 2 and Figure 6 , an avoidance portion 2122 is provided on each of the opposite sides of the main body portion 2121 along the second direction.

[0111] In some embodiments, the main body portion 2121 has at least one first mating structure 2123 for connecting with the pressure strip 30, and each avoidance portion 2122 has at least one second mating structure 2124 for connecting with the main body 211.

[0112] Here, the specific structural forms of the first mating structure 2123 and the second mating structure 2124 are not limited, as long as they can meet the connection requirements. Exemplarily, both the first mating structure 2123 and the second mating structure 2124 are provided as hole structures for the fastening structure to extend into, such as threaded hole structures.

[0113] In this embodiment, the spacer block 212 is generally formed in a "convex" shape structure. The middle convex portion along the second direction is the main body portion 2121 and is connected to the pressure strip 30, and the two sunken portions on both sides are the avoidance portions 2122 and are connected to the main body 211. This connection method helps to optimize the stress distribution of the spacer block 212, improve the fixing strength between the spacer block 212 and the pressure strip 30 and the main body 211, and thus improve the anti-deformation ability of the side beam 21.

[0114] It should be noted that, in this embodiment, although two avoidance parts 2122 are provided, only one of the avoidance parts 2122 may actually perform the avoidance function. In other words, only one of the avoidance parts 2122 may be opposite to the high voltage output component 40 and spaced apart.

[0115] In some embodiments, refer to Figure 2 The battery device 100 includes a low-voltage connector 60, which is disposed on the mounting surface 211a and distributed with the pad 212 along a second direction.

[0116] Here, the low-voltage connector 60 is specifically used to enable the low-voltage control system inside the battery device 100 to exchange signals and power with the external system. The specific structural form of the low-voltage connector 60 can refer to the relevant technology in this field, and is not limited in this application.

[0117] In this embodiment, the low-voltage connector 60 is disposed on the mounting surface 211a of the body 211, which helps to further save space and meet the creepage distance and clearance requirements of the low-voltage system.

[0118] In some embodiments, refer to Figure 2 The battery device 100 includes a plurality of pressure strips 30 spaced apart along a second direction, and at least one side beam 21 includes a plurality of pads 212 spaced apart along a second direction on the mounting surface 211a, each pad 212 being connected to a pressure strip 30.

[0119] In this embodiment, by setting multiple pressure strips 30, the deformation resistance of the side beam 21 can be further improved. Furthermore, by setting multiple spacers 212 at intervals, the space occupied by the spacers 212 can be reduced while meeting the working requirements of the multiple pressure strips 30, so that more electrical components can be set on the mounting surface 211a of the body 211, thereby helping to improve energy density.

[0120] In some embodiments, refer to Figure 3 and Figure 5 The side beam 21 includes fasteners 213, and the pressure strip 30 and the pad block 212 are fixedly connected by fasteners 213.

[0121] For example, the fastener 213 includes, but is not limited to, a screw-in connector. Taking the fastener 213 as a screw-in connector as an example, the pressure strip 30 is provided with a first mounting hole 30a, the pad block 212 is provided with a first mating structure 2123, the first mating structure 2123 is a threaded hole, the fastener 213 passes through the first mounting hole 30a and is screwed into the threaded hole, thereby achieving a fixed connection.

[0122] In this embodiment, this fixing method helps to reduce the impact of the manufacturing tolerances of the body 211 and the pad 212 on the shape of the pressure strip 30, so that the pressure strip 30 can maintain the desired shape, optimize the stress distribution of the force transmission structure formed by the pressure strip 30 and the side beam 21, and thus further improve the deformation resistance.

[0123] In some embodiments, refer to Figure 3 and Figure 4 The pad 212 and the body 211 can also be connected by the fastener 213 mentioned above, which helps to further reduce the impact of manufacturing tolerances.

[0124] Taking the fastener 213 as a screw-in component as an example, the pad 212 is provided with a second mating structure 2124, which is a hole structure. The body 211 has a second mounting hole 211b, which is a threaded hole. The fastener 213 passes through the second mating structure 2124 and is screwed into the second mounting hole 211b.

[0125] The battery device 100 in one or more of the above embodiments will now be described in more detail and with reference to a specific embodiment.

[0126] Reference Figures 2-6 The battery device 100 in this embodiment includes a battery cell pack 10, a housing 20, and a pressure strip 30.

[0127] The battery cell pack 10 includes a plurality of battery cells 11 stacked along a first direction. The housing 20 includes a housing body 22 and two side beams 21 arranged opposite to each other along the first direction. The housing body 22 has a receiving space 22a. The side beams 21 and the battery cell pack 10 are disposed in the receiving space 22a. The side beams 21 are used to constrain the battery cell pack 10.

[0128] The pressure strip 30 is disposed on one side of the battery cell 11 along the height direction and covers at least a portion of the shoulder area of ​​the battery cell 11. The two ends of the pressure strip 30 along the first direction are respectively connected to the two side beams 21.

[0129] The side beam 21 includes a body 211 and a pad 212 fixed to the body 211. The side surface of the body 211 facing the pressure strip 30 along the height direction is formed as a mounting surface 211a, the pad 212 protrudes from the mounting surface 211a along the height direction, and the pressure strip 30 is fixed to the side surface of the pad 212 facing away from the body 211 along the height direction.

[0130] The battery device 100 includes a high-voltage output component 40 and an output electrode base 50 electrically connected to the battery cell 11. The high-voltage output component 40 and the mounting surface 211a are arranged opposite to each other and spaced apart along the height direction. The output electrode base 50 is disposed on the mounting surface 211a and distributed with the pad 212 along the second direction. The high-voltage output component 40 is connected to the output electrode base 50.

[0131] The pad 212 has a main body 2121 and two clearance portions 2122 connected to opposite sides of the main body 2121 along a second direction. The main body 2121 protrudes from the clearance portions 2122. A pressure strip 30 is connected to the main body 2121. A high-voltage output member 40 is positioned opposite and spaced apart from the clearance portions 2122 along the height direction. The main body 2121 has at least one first mating structure 2123 for connecting with the pressure strip 30, and each clearance portion 2122 has at least one second mating structure 2124 for connecting with the body 211.

[0132] Embodiments of this application also provide an electrical device that includes a battery device 100 as described in any of the above embodiments.

[0133] The electrical device of this application embodiment has all the advantages of the battery device 100 described in any of the above embodiments, and will not be repeated here.

[0134] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0135] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, The battery device includes: The box-shaped structure forms a storage space; A battery cell assembly includes a plurality of battery cells stacked along a first direction, the battery cell assembly being housed within the receiving space; Two side beams are respectively disposed on opposite sides of the battery cell pack along the first direction, and both side beams abut against the battery cell pack. A pressure strip is disposed on one side of the battery cell along the height direction. The pressure strip's opposite ends along the first direction are respectively connected to two side beams. The first direction intersects the height direction. At least one side beam includes a body and a pad fixed to the body. The surface of the body facing the pressure strip along the height direction forms a mounting surface. The pad protrudes from the mounting surface along the height direction, and the pressure strip is fixed to the pad. An electrical component, electrically connected to the battery cell pack, is disposed on the side of the body facing the pressure strip along the height direction.

2. The battery device according to claim 1, characterized in that, The electrical component includes a high-voltage output component electrically connected to the battery cell pack, and the high-voltage output component and the mounting surface are arranged opposite to each other and spaced apart along the height direction.

3. The battery device according to claim 2, characterized in that, The battery device includes an output electrode base, which is disposed on the mounting surface and distributed along the second direction with the pad. The high-voltage output component is insulatedly connected to the output electrode base. The first direction intersects the second direction, and both the first direction and the second direction are perpendicular to the height direction of the battery cell.

4. The battery device according to claim 2, characterized in that, The pad has a main body and at least one clearance portion connected to the main body. The main body protrudes from the clearance portion. The pressure strip is connected to the main body. The high-voltage output component is opposite to and spaced apart from the clearance portion along the height direction.

5. The battery device according to claim 4, characterized in that, The main body is provided with a clearance portion on each of its opposite sides along the second direction; and / or The main body has at least one first mating structure for connecting with the pressure strip, and the clearance part has at least one second mating structure for connecting with the main body. The first direction intersects with the second direction, and both the first direction and the second direction are perpendicular to the height direction of the battery cell.

6. The battery device according to any one of claims 1-5, characterized in that, The battery device includes a low-voltage connector disposed on the mounting surface and distributed along a second direction with the pad, the first direction intersecting the second direction, and both the first direction and the second direction being perpendicular to the height direction of the battery cell.

7. The battery device according to any one of claims 1-5, characterized in that, The battery device includes a plurality of pressure strips spaced apart along a second direction, and at least one side beam includes a plurality of pads spaced apart on the mounting surface along the second direction, each pad being connected to a pressure strip, the first direction intersecting the second direction, and both the first direction and the second direction being perpendicular to the height direction.

8. The battery device according to any one of claims 1-5, characterized in that, The side beam includes fasteners, and the pressure strip and the pad are fixedly connected by the fasteners.

9. The battery device according to claim 8, characterized in that, The pad is fixedly connected to the body by the fastener.

10. An electrical appliance, characterized in that, The electrical equipment includes the battery device according to any one of claims 1-9.

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