Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and a power utilization device. According to the embodiment of the invention, the insulating parts cover the second areas on the two sides of the first area where the pressure relief mechanism is located, and the insulating parts cover at least part of the confluence parts located in the second areas, so that when the battery monomers are in a thermal runaway state, the second areas are blocked by the insulating parts; therefore, the risk of electrical conduction of the two battery units caused by accumulation of emissions at the pressure relief mechanism in the second area can be reduced. Furthermore, due to the fact that the stress releasing structure is defined on the target insulating part, when the target insulating part is subjected to the acting force of the emissions, the acting force acting on the target insulating part can be reduced through the stress releasing structure, and therefore the target insulating part can stop the emissions more reliably. Therefore, according to the insulating part provided by the embodiment of the invention, the risk of insulation failure of the two adjacent battery monomers can be reduced, and the use reliability of the battery device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and a power utilization device. BACKGROUND

[0002] With the development of battery technology, the requirements for battery endurance and the like are also increasingly high. A battery device usually includes multiple battery monomers to meet the requirements of large power and long endurance. In the case of thermal runaway of the battery monomers, the emissions sprayed by the battery monomers are easy to cause sparking and explosion, and the thermal runaway can spread among the battery monomers, which exists a safety hazard and affects the use reliability of the battery device. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a battery device and a power utilization device to improve the use reliability of the battery device.

[0004] In a first aspect, the present application provides a battery device, including: multiple battery monomers, the battery monomers having a first surface and a pressure relief mechanism, the first surface including a first area and second areas located on both sides of the first area, the pressure relief mechanism being arranged in the first area; a current collecting component, the multiple battery monomers being electrically connected through the current collecting component, the part of the current collecting component connected with the battery monomers being located in the second area of the battery monomers; and multiple insulation members, covers being arranged in the second areas and covering at least part of the current collecting component located in the second areas; there being at least a target insulation member arranged in the second areas of two adjacent battery monomers among the multiple insulation members, a stress release structure being defined on the target insulation member.

[0005] In the technical scheme of the present application, the insulation members are arranged in the second areas on both sides of the first area where the pressure relief mechanism is located, and at least part of the current collecting component located in the second areas is covered by the insulation members. In the case of thermal runaway of the battery monomers, the risk of the emissions at the pressure relief mechanism gathering in the second areas to cause electrical conduction between two battery monomers can be reduced due to the blocking of the second areas by the insulation members. Further, the stress release structure is defined on the target insulation member, and the force acting on the target insulation member can be reduced through the stress release structure when the target insulation member is acted on by the emissions, so that the target insulation member can more reliably block the emissions. Therefore, the insulation members provided in the present application can reduce the risk of insulation failure of two adjacent battery monomers and improve the use reliability of the battery device.

[0006] In some embodiments, the target insulation member includes multiple insulation portions; at least part of the side of at least two adjacent insulation portions adjacent to each other is not connected, and the stress release structure is defined.

[0007] The stress release structure is defined by at least two adjacent insulation portions, when one of the insulation portions is subjected to the force of the discharge of the pressure relief mechanism, at least part of the force can be released through the stress release structure, so as to reduce the force acting on the other insulation portion, and further reduce the risk of insulation failure of the two adjacent battery cells.

[0008] In some embodiments, the unconnected portions of the at least two adjacent insulation portions adjacent to each other define a gap, and the gap constitutes the stress release structure.

[0009] The stress release structure constituted by the gap provides a space for stress release, so as to reduce the constraint on the connection of the two insulation portions. Meanwhile, the size of the gap can be more flexibly set according to the use requirement, so as to release the force acting on the corresponding insulation portion.

[0010] In some embodiments, the unconnected portions of the at least two adjacent insulation portions adjacent to each other define a slit, and the slit constitutes the stress release structure.

[0011] When one of the insulation portions is subjected to the force of the discharge of the pressure relief mechanism, the structure continuity of the insulation member is changed due to the presence of the slit, so that at least part of the stress can be released at the slit, so as to reduce the force acting on the other insulation portion.

[0012] In some embodiments, the two adjacent second regions are adjacent to each other at one side and define an abutment region; the stress release structure is arranged corresponding to the abutment region.

[0013] Since the abutment region is located at the abutment of the two adjacent battery cells, the two adjacent insulation portions substantially correspond to the second regions of the two battery cells respectively, so as to further reduce the risk of insulation failure of the two adjacent battery cells.

[0014] In some embodiments, the stress release structure has a starting end and a terminal end; at least one of the starting end and the terminal end is arranged through the edge of the target insulation member in the direction of the target insulation member along the first surface.

[0015] In the case that one of the starting end and the terminal end of the stress release structure is arranged through the edge of the target insulation member, the part of the target insulation member can be separated, so as to further reduce the transmission of the force between the parts of the target insulation member. In the case that both the starting end and the terminal end of the stress release structure are arranged through the edge of the target insulation member, the target insulation member has at least two separable parts, so that when one of the parts is subjected to the force, the one part will not further transmit the force to the other part, so as to further improve the protection capability of the target insulation member.

[0016] In some embodiments, the plurality of battery cells are arranged in columns along a first direction and in rows along a second direction; the first direction and the second direction intersect with each other; the two second regions of the first surface are located on two sides of the first region along the first direction; wherein there is at least a target insulation member covering the two second regions adjacent along the first direction among the plurality of insulation members; and / or, there is at least a target insulation member covering the two second regions adjacent along the second direction among the plurality of insulation members.

[0017] By arranging the target insulation member on the two second regions adjacent along the first direction and / or the second direction, the force in the corresponding direction can be released.

[0018] In some embodiments, in each column of battery cells, the second regions adjacent along the second direction in sequence constitute a sub-target region; in two adjacent columns of battery cells, the two sub-target regions adjacent constitute a target region; and the target insulation member is covered on the target region.

[0019] By arranging the target insulation member on the target region constituted by the sub-target regions of the two adjacent columns of battery cells, the risk of insulation failure of the two adjacent columns of battery cells can be reduced.

[0020] In some embodiments, the target insulation member comprises two insulation parts independently and spaced apart from each other; in the same target region, the two insulation parts of the target insulation member are covered on the two sub-target regions one by one; and in the same target insulation member, the space between the two insulation parts constitutes at least part of a stress release structure.

[0021] By configuring the two insulation parts covered on the two sub-target regions as being independently and spaced apart from each other, when the discharge acts on the corresponding insulation part of one of the battery cells in the case of thermal runaway of the one of the battery cells, the force borne by the insulation part will not be transmitted to the other insulation part, thereby further reducing the risk of insulation failure of the two adjacent columns of battery cells.

[0022] In some embodiments, there is a first target region among all the target regions, and one target insulation member is covered on the first target region; and / or, there is a second target region among all the target regions, and a plurality of target insulation members are covered on the second target region, and all the target insulation members on the same second target region are arranged along the second direction.

[0023] By covering one target insulation member on the first target region, the protection capability can be improved while facilitating the manufacturing. By covering a plurality of target insulation members on the second target region, the transmission of force between the target insulation members can be further reduced, thereby further improving the protection capability of the target insulation member.

[0024] In some embodiments, two battery cells adjacent along the second direction are electrically connected by a busbar component.

[0025] In this way, in the case that the target area is covered by the target insulation part, even if one of the sub-target areas in the target area is lifted by the force of the emission, due to the small change in the electric potential between the two battery monomers adjacent in the second direction, the speed and the possibility of the thermal runaway spreading from one battery monomer to another battery monomer are reduced.

[0026] In some embodiments, the battery device further comprises at least one limiting part corresponding to the at least one insulation part; the limiting part has a limiting portion, and the limiting portion is located on the side of the corresponding insulation part away from the first surface.

[0027] By arranging the limiting part corresponding to the insulation part, when the insulation part is subjected to a force, the insulation part can be limited by the limiting part, thereby reducing the risk of the insulation part being lifted on the second area and improving the protection capability of the insulation part.

[0028] In some embodiments, the insulation part corresponding to the limiting part includes the target insulation part, and the target insulation part is provided with a mounting gap; the limiting part has a mounting portion connected to the limiting portion; the second area and the busbar component covered by the target insulation part define a mounting groove in communication with the mounting gap, and the mounting portion is fixed in the mounting groove through the mounting gap.

[0029] By arranging the limiting part corresponding to the target insulation part, not only the protection capability of the target insulation part can be further improved, but also the installation of the limiting part is facilitated.

[0030] In some embodiments, the target insulation part includes a plurality of insulation portions independent of each other, and at least two adjacent insulation portions define the mounting gap.

[0031] Since the plurality of insulation portions are independent of each other, the structure defined by the plurality of insulation portions is at least part of the stress release structure, and the transmission of the force between the insulation portions can be improved. Since the mounting gap is defined by at least two adjacent insulation portions independent of each other, not only the limiting part can be installed, but also the distance between the at least two adjacent insulation portions can be further increased, and the stress release effect can be further improved.

[0032] In some embodiments, the arrangement direction of the two insulation portions defining the mounting gap is a target direction; the limiting portion corresponding to the target insulation part has a first size along the target direction; the first size is greater than or equal to 3 mm; and / or the limiting part corresponding to the target insulation part has a plurality of limiting portions; for the two insulation portions defining the mounting gap, at least one limiting portion is arranged on the side of each of the two insulation portions away from the first surface.

[0033] By controlling the first size, the limiting effect of the limiting portion can be further improved. By configuring the limiting member to have multiple limiting portions, two insulation portions can be limited by one limiting member, and the structure is simpler and easier to install.

[0034] In some embodiments, one limiting member is arranged at the installation interval; or, multiple limiting members are arranged at the installation interval.

[0035] In the case of one limiting member, the structure is simpler and easier to install. In the case of multiple limiting members, the limiting can be performed in different positions and directions, and the limiting reliability can be improved.

[0036] In some embodiments, at least part of the stress release structure is formed by the installation interval.

[0037] In this way, the installation interval can be used to install the limiting member, and the installation interval can also be used to release stress.

[0038] In some embodiments, the limiting portion abuts against the target insulation member; or, a preset interval is arranged between the limiting portion and the target insulation member, and the preset interval d satisfies: d≤10mm.

[0039] By abutting the limiting portion against the target insulation, the target insulation member can be limited by the abutting force provided by the limiting portion. By arranging a preset interval between the limiting portion and the target insulation, the target insulation member can be prevented from moving away from the first surface, and the limiting member can be easily installed.

[0040] In some embodiments, at least one of the battery monomers and the busbar component is bonded to the insulation member.

[0041] In this way, the fixation of the insulation member can be achieved by bonding.

[0042] In some embodiments, the multiple battery monomers are arranged in columns along a first direction and arranged in rows along a second direction; the first direction and the second direction intersect each other; the battery device further comprises a spacer, and the spacer is arranged between adjacent two rows and / or two columns of battery monomers; wherein the spacer is configured as a heat insulation member; or, the spacer is configured as a thermal management component.

[0043] In the case of the spacer being configured as a heat insulation member, the heat generated by the battery monomer that has thermal runaway can be inhibited from spreading to the adjacent battery monomers by the heat insulation effect of the heat insulation member. In the case of the spacer being configured as a thermal management component, the adjacent battery monomers can be thermally managed by the thermal management effect of the thermal management component.

[0044] In a second aspect, the application provides a power consumption device comprising the battery device in any of the above embodiments.

[0045] The use device also has the advantages of the battery device in any of the above embodiments, and thus will not be described here.

[0046] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0047] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The accompanying drawings are included to provide a description of the embodiments and are not meant to limit the present application. Moreover, in the attached drawings, the same reference numerals are used to denote the same components throughout the several views. In the drawings:

[0048] Figure 1 Structure diagram of a vehicle in some embodiments of the present application;

[0049] Figure 2 Exploded structure diagram of a battery device in some embodiments of the present application;

[0050] Figure 3 Perspective structure diagram of a battery module in some embodiments of the present application;

[0051] Figure 4 Exploded structure diagram of a battery cell in some embodiments of the present application;

[0052] Figure 5 Perspective structure diagram of a battery device in some embodiments of the present application;

[0053] Figure 6 Structure diagram of a target insulating member in some embodiments of the present application; Figure 5 Partially exploded structure diagram of a battery device;

[0054] Figure 7 Structure diagram of a target insulating member in some embodiments of the present application; Figure 5 Top view structure diagram of a battery device;

[0055] Figure 8 Perspective structure diagram of a comparative battery device in a comparative example of the present application;

[0056] Figure 9 Structure diagram of a target insulating member in some embodiments of the present application;

[0057] Figure 10 Structure diagram of a target insulating member in some embodiments of the present application;

[0058] Figure 11Structure diagram of the target insulation piece in some embodiments of the present application;

[0059] Figure 12 Structure diagram of the target insulation piece in some embodiments of the present application;

[0060] Figure 13 Structure diagram of the target insulation piece in some embodiments of the present application;

[0061] Figure 14 Structure diagram of the battery device in some embodiments of the present application;

[0062] Figure 15 Structure diagram of the battery device in some embodiments of the present application;

[0063] Figure 16 Structure diagram of the battery device in some embodiments of the present application; Figure 5 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0064] Structure diagram of the battery device in some embodiments of the present application; Figure 17 Structure diagram of the battery device in some embodiments of the present application; Figure 16 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0065] Structure diagram of the battery device in some embodiments of the present application; Figure 18 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0066] Structure diagram of the battery device in some embodiments of the present application; Figure 19 Structure diagram of the battery device in some embodiments of the present application; Figure 18 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0067] Structure diagram of the battery device in some embodiments of the present application; Figure 20 Structure diagram of the battery device in some embodiments of the present application; Figure 18 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0068] Structure diagram of the battery device in some embodiments of the present application; Figure 21 Structure diagram of the battery device in some embodiments of the present application; Figure 18 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0069] Structure diagram of the battery device in some embodiments of the present application; Figure 22 Structure diagram of the battery device in some embodiments of the present application; Figure 21 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0070] Structure diagram of the battery device in some embodiments of the present application; Figure 23 Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0071] Structure diagram of the battery device in some embodiments of the present application; Structure diagram of the battery device in some embodiments of the present application;

[0072] Vehicle 1; Battery device 10, controller 20, motor 30;

[0073] Battery device 10, controller 20, motor 30; Battery device 10, controller 20, motor 30;

[0074] Battery device 10, controller 20, motor 30; Battery device 10, controller 20, motor 30;

[0075] Battery cell 200, end cover 210, electrode terminal 211, first surface b1, first region z1, second region z2, abutment region w, target region T, first target region T1, second target region T2, shell 220, electrode assembly 230, pressure relief mechanism 240;

[0076] Converging component 300;

[0077] Insulating piece 400, target insulating piece M, insulating portion M1, gap g, slit q, stress release structure Y, starting end e1, ending end e2, mounting interval X;

[0078] Limiting piece 500, limiting portion 510, mounting portion 520;

[0079] Spacer 600;

[0080] Comparative battery device 10', comparative target insulating piece M';

[0081] First size h, preset interval d;

[0082] First direction F1, second direction F2, third direction F3. DETAILED DESCRIPTION

[0083] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0084] 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 this 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.

[0085] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0086] 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 referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments in accordance with the application.

[0087] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects have an“or” relationship.

[0088] In the description of the embodiments of the application, the term“a plurality of” means two or more (including two), and similarly, “a plurality of groups” means two or more groups (including two groups), and “a plurality of pieces” means two or more pieces (including two pieces).

[0089] In the description of the embodiments of the 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 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 a limitation on the embodiments of the application.

[0090] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood broadly, 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 medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0091] At present, from the development of market situation, the application of power battery is more and more extensive. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing. With the development of battery technology, more and more electric equipment uses battery device as power supply. The requirements for battery device, such as endurance, are also getting higher and higher. The battery device usually includes multiple battery monomers to meet the demand of large power and long endurance.

[0092] After the battery device is used for a period of time, aging is inevitable, or the temperature of the battery device continues to rise during use, or the battery device is affected by the mutation of the use environment (such as overcharge, overdischarge, extrusion, collision and other abnormal use environments) during use. The above factors may cause the battery monomer of the battery device to easily occur thermal runaway. The battery monomer has a pressure relief mechanism. When the internal pressure of a single battery monomer in the battery device is too large, the battery monomer quickly heats up, and the pressure relief mechanism can discharge pressure to release the internal pressure of the battery monomer, reducing the probability of dangerous accidents such as explosion of the battery monomer caused by too fast pressurization of the battery monomer.

[0093] In the case of thermal runaway of the battery monomer, the battery monomer quickly heats up, and a large amount of heat and a mixture of solid, liquid and gas phases are generated inside the battery monomer. The mixture includes but is not limited to electrolyte, positive and negative electrode sheets dissolved or split, fragments of isolation film, high-temperature and high-pressure gas generated by reaction, etc. When the pressure relief mechanism is actuated, the mixture generated inside the battery monomer is discharged as a discharge from the part of the pressure relief mechanism actuated, thereby easily causing sparking, explosion in the circuit, causing thermal runaway to spread among the battery monomers, and there is a security risk, affecting the use reliability of the battery device.

[0094] Therefore, in order to improve the use reliability of the battery device, the battery device provided by the embodiments of the present application improves the protection capability of the busbar component connected to the battery monomer to improve the use reliability of the battery device. Specifically, by arranging an insulating piece covering at least the busbar component, and cooperating with the arrangement of the insulating piece and the structure of the insulating piece, the protection capability of the insulating piece is improved, thereby improving the use reliability of the battery device.

[0095] The battery device disclosed in the embodiments of the present application can be used in electric devices such as vehicles, ships or aircraft, etc. The power supply system of the electric device can be composed of the battery device disclosed in the present application and other components. In this way, it is beneficial to improve the problem of affecting the use reliability of the battery device due to the spread of thermal runaway of the battery monomer.

[0096] The embodiments of the present application provide a power consumption device using a battery device as a power supply. The power consumption device is a device that uses electric energy as energy and realizes corresponding functions by consuming electric energy. For example, the power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0097] The power consumption device of the embodiments of the present application can include a device main body and a power supply device. The power supply device is used to supply power to the device main body, and can include a battery monomer or a battery pack. The device main body refers to the main structure that consumes electric energy to realize corresponding functions. For example, the power consumption device can be a mobile phone, and the device main body is a part that can realize communication functions, etc. The part that can realize communication functions, etc. is supplied with power by the battery monomer or the battery pack. For example, the power consumption device can be a car, and the device main body is a part that can provide a seat for a person and can run on the road. The part that can provide a seat for a person and can run on the road is supplied with power by the battery monomer or the battery pack. The power supply device refers to a device that can output electric energy. For example, the battery pack composed of the battery monomer can output electric energy.

[0098] The following embodiments take a power consumption device as a vehicle in some embodiments of the present application as an example for illustration.

[0099] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a vehicle 1 in some embodiments of the present application. The vehicle 1 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or a range extended car, etc. The vehicle 1 is internally provided with a battery device 10, which can be arranged at the bottom, the head or the tail of the vehicle 1. The battery device 10 can be used for power supply of the vehicle 1, for example, the battery device 10 can be used as an operating power supply of the vehicle 1. The vehicle 1 can further include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to supply power to the motor 30, for example, to meet the power demand of the vehicle 1 during starting, navigation and driving.

[0100] In some embodiments of the present application, the battery device 10 can not only be used as an operating power supply of the vehicle 1, but also be used as a driving power supply of the vehicle 1, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1.

[0101] In order to meet different power consumption requirements, please refer to Figure 2 , Figure 2For the exploded view of the battery device 10 in some embodiments of the present application, the battery device 10 can include a plurality of battery cells 200, which refers to the smallest unit constituting a battery module or a battery pack. The plurality of battery cells 200 can be connected in series and / or in parallel via electrode terminals 211 to be applied to various application scenarios. The battery mentioned in the present application includes a battery module or a battery pack. Among them, the plurality of battery cells 200 can be connected in series or in parallel or in a mixed connection, which refers to a mixture of series and parallel connections. The battery device 10 can also be referred to as a battery pack. In the embodiments of the present application, the plurality of battery cells 200 can directly constitute a battery pack, or first constitute a battery module, and then the battery module constitutes a battery pack.

[0102] The battery device 10 can include a box 100 or not include the box 100. For reference Figure 2 , the battery device 10 can include the box 100 and a plurality of battery modules, and the plurality of battery modules are accommodated inside the box 100. The box 100 is used to accommodate the battery cells 200 to avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cells 200. The box 100 can be a simple solid structure such as a cuboid or a cylinder or a sphere, or a complex solid structure composed of a cuboid or a cylinder or a sphere, which is not limited in the embodiments of the present application. The material of the box 100 can be an alloy material such as aluminum alloy or iron alloy, or a high polymer material such as polycarbonate or polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiments of the present application.

[0103] In some embodiments, the box 100 can include a first part 110 and a second part 120, the first part 110 and the second part 120 are mutually covered, and the first part 110 and the second part 120 jointly define a space for accommodating the battery cells 200. The second part 120 can be a hollow structure with one end open, and the first part 110 can be a plate-shaped structure, the first part 110 covers the open side of the second part 120 to make the first part 110 and the second part 120 jointly define the space for accommodating the battery cells 200. The first part 110 and the second part 120 can also be hollow structures with one side open, and the open side of the first part 110 covers the open side of the second part 120.

[0104] For reference Figure 3 , Figure 3 For the perspective view of the battery module in some embodiments of the present application. Figure 3In some embodiments, the battery module can include a plurality of battery cells 200, which can be connected in series, in parallel, or in a mixed manner to form a battery module, and a plurality of battery modules can be connected in series, in parallel, or in a mixed manner to form the battery device 10. In some embodiments, the battery cell 200 can include a lithium ion battery, a sodium ion battery, or a magnesium ion battery, and the like. In some embodiments, the battery cell 200 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes, and the like.

[0105] As another embodiment of the battery device 10, the battery device 10 can not include the box 100, but the plurality of battery cells 200 can be electrically connected and assembled into a vehicle, or the plurality of battery cells 200 can be assembled into a vehicle as a whole through some fixing structure.

[0106] Please refer to Figure 4 , Figure 4 The exploded view of the battery cell 200 is provided for some embodiments of the present application. The battery cell 200 refers to the smallest unit of the battery device 10. As shown in Figure 4 , the battery cell 200 includes a housing, an electrode assembly 230, and other functional components. The housing includes an end cap 210 and a case 220.

[0107] The end cap 210 refers to a component that can be covered on the opening of the case 220 to isolate the internal environment of the battery cell 200 from the external environment. Without limitation, the shape of the end cap 210 can be adapted to the shape of the case 220 to fit the case 220. Optionally, the end cap 210 can be made of a material with certain hardness and strength, so that the end cap 210 is not easy to deform when subjected to extrusion and collision, so that the battery cell 200 can have higher structural strength, and the safety performance can also be improved. The material of the end cap 210 can be copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like, and the present application is not specially limited. In some embodiments, the end cap 210 can also be provided with a liquid injection hole for injecting electrolyte into the interior of the battery cell 200. Of course, the liquid injection hole can be selected to be provided on the end cap 210 or the case 220 according to the specific use.

[0108] The shell 220 is a component for cooperating with the end cover 210 to form an internal environment of the battery cell 200, wherein the formed internal environment can be used to accommodate the electrode assembly 230, electrolyte (not shown in the figure) and other components. The shell 220 and the end cover 210 can be independent components, and an opening can be provided on the shell 220, and the end cover 210 is made to cover the opening to form the internal environment of the battery cell 200. Without limitation, the end cover 210 and the shell 220 can also be integrated, specifically, the end cover 210 and the shell 220 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 220, the end cover 210 is made to cover the shell 220. The shell 220 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 220 can be determined according to the specific shape and size of the electrode assembly 230. The material of the shell 220 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not have special limitations. Figure 4 For example, the shell 220 can include a bottom wall and a side wall surrounding the periphery of the bottom wall, and the bottom wall is a component opposite to the opening of the shell 220. It can be understood that the bottom wall is relative to the shell 220, and the bottom wall does not necessarily locate at the bottom of the shell 220, for example, the bottom wall can also locate at the side of the shell 220, and correspondingly, the opening of the shell 220 also locates at the side of the shell 220, and the embodiments of the present application do not have limitations.

[0109] The electrode assembly 230 is a component in which electrochemical reactions occur in the battery cell 200. One or more electrode assemblies 230 can be contained in the shell 220. The electrode assembly 230 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and an insulating member is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting a main body of the electrode assembly 230, and a portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab. The positive tab and the negative tab can be located at one end of the main body or at two ends of the main body respectively, and can be located at the top of the main body or at the side wall of the main body, which is not specifically limited. In the charging and discharging process of the battery device 10, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminal 211 to form a current loop. The insulating member is used to isolate the positive electrode sheet and the negative electrode sheet, and the electrons in the battery cell 200 cannot freely pass through, and the ions in the electrolyte can freely flow between the positive electrode sheet and the negative electrode sheet. The insulating member can be a thin film member made of PE (polyethylene), PP (polypropylene) and the like. The present application does not have special limitations on the type of insulating film, and any known porous structure insulating film with good chemical stability and mechanical stability can be selected.

[0110] In some embodiments, in combination with Figure 3 and Figure 4 As shown in FIG. 2A and FIG. 2B, the battery cell 200 further comprises an electrode terminal 211, which can be disposed on the end cover 210 or on the shell 220. The electrode terminal 211 can be electrically connected to the tab of the electrode assembly 230 for outputting or inputting the electric energy of the battery cell 200. The electrode terminal 211 is made of an electrically conductive material to realize the input and output of electric energy. The material of the electrode terminal 211 can be, but is not limited to, copper, aluminum, etc. The shape of the electrode terminal 211 can be, but is not limited to, a cylinder, a prism, etc. During the charging and discharging process of the battery cell 200, the positive active material and the negative active material react with the electrolyte, and the tab connects the electrode terminal 211 to form a current loop.

[0111] In some embodiments, in combination with Figure 3 and Figure 4 As shown in FIG. 2A and FIG. 2B, the battery cell 200 further comprises a pressure relief mechanism 240 for pressure relief, which can be disposed on the end cover 210 or on the shell 220. The pressure relief mechanism 240 is used to release the internal pressure when the internal pressure or temperature of the battery cell 200 reaches a threshold value, so as to improve the safety performance of the battery cell 200. The threshold value is different according to different design requirements. The threshold value can depend on the material of one or more of the positive plate, the negative plate, the electrolyte and the separator in the battery cell 200. The pressure relief mechanism 240 can take the form of a pressure relief valve, a gas valve, a pressure relief valve or a safety valve, and can specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, i.e., when the internal pressure or temperature of the battery cell 200 reaches the threshold value, the pressure relief mechanism 240 performs an action or the weak structure provided in the pressure relief mechanism 240 is damaged, thereby forming an opening or passage for the internal pressure or temperature to be released.

[0112] In some embodiments, the inner side of the end cover 210 can further be provided with an insulating component, which can be used to isolate the electrically connected components in the shell 220 from the end cover 210 to reduce the risk of short circuit. For example, the insulating component can be plastic, rubber, etc.

[0113] In some embodiments, in combination with Figure 3 and Figure 4As shown, the battery monomer 200 further comprises a busbar component 300, which can be used to electrically connect the electrode terminals 211 of two adjacent battery monomers 200, so as to connect the plurality of battery monomers 200 in series, in parallel or in a mixed manner. The busbar component 300 can also electrically connect the electrode terminals 211 of the battery monomer 200 and the components of the external electrical device, so as to electrically connect the external electrical device and the battery device 10. The busbar component 300 is made of a conductive material, which can be but is not limited to copper or aluminum. The material of the busbar component 300 and the electrode terminals 211 can be the same or different. The busbar component 300 can be but is not limited to a busbar or a wire. The connection between the busbar component 300 and the electrode terminals 211 can be but is not limited to bolt connection, bonding, clamping, riveting, sleeving, welding or one-piece forming. The one-piece forming refers to forming by using one-piece processes such as extrusion, injection molding or die casting.

[0114] According to some embodiments of the present application, please refer to Figures 5 to 7 , Figure 5 for a perspective structural schematic diagram of the battery device 10 in some embodiments of the present application, Figure 6 for Figure 5 a partially exploded structural schematic diagram of the battery device 10 shown, Figure 7 for Figure 5 a top view structural schematic diagram of the battery device 10 shown, the battery device 10 provided by the embodiments of the present application comprises a plurality of battery monomers 200, a busbar component 300 and a plurality of insulating members 400.

[0115] The battery monomer 200 has a first surface b1 and a pressure relief mechanism 240, the first surface b1 comprises a first region z1 and a second region z2 located on both sides of the first region z1, and the pressure relief mechanism 240 is arranged in the first region z1. Please refer to Figure 3 and Figure 7 for the first region z1 and the second region z2 shown in dashed lines in Figure 3 and Figure 7 . The first surface b1 can be a side surface of the end cover 210 facing away from the inside of the battery monomer 200, or a side surface of the shell 220 facing away from the inside of the battery monomer 200. In the embodiments of the present application, the first surface b1 is a side surface of the end cover 210 facing away from the inside of the battery monomer 200, and the electrode terminals 211 and the pressure relief mechanism 240 are arranged on the end cover 210; wherein the pressure relief mechanism 240 is arranged in the first region z1, and one electrode terminal 211 is arranged on each of the two second regions z2. The size of the first region z1 and the second region z2 can be determined according to the specific structure, which is not limited here.

[0116] The plurality of battery cells 200 are electrically connected by the busbar components 300, and the parts of the busbar components 300 connected to the battery cells 200 are located in the second regions z2 of the battery cells 200. Specifically, the busbar components 300 are connected to the electrode terminals 211 on the second regions z2. The number and arrangement of the busbar components 300 can be set according to the required electrical connection mode of the plurality of battery cells 200, and are not specifically limited herein.

[0117] The insulating members 400 are components with certain insulation properties. The insulating members 400 can be provided in a sheet shape. The plurality of insulating members 400 are arranged on the second regions z2 and cover at least part of the busbar components 300 located in the second regions z2. It can be understood that, by arranging the insulating members 400 on the second regions z2, the insulating members 400 can shield the covered regions, thereby preventing the discharge of the pressure relief mechanism 240 from contacting the covered regions and preventing the discharge from contacting the covered busbar components 300.

[0118] Among the plurality of insulating members 400, there are at least target insulating members M arranged on two adjacent second regions z2, and the target insulating members M define stress release structures Y. The stress release structures Y can effectively release (e.g., disperse, transfer, or eliminate) the forces acting on the target insulating members M due to various reasons (e.g., external forces, temperature changes, material shrinkage, etc.), so as to improve the situation that the target insulating members M are damaged or fail due to the forces. Exemplarily, the stress release structures Y can be holes, grooves, or other structures.

[0119] Since the pressure relief mechanism 240 is arranged on the first regions z1, when the battery cells 200 are in thermal runaway, the discharge of the pressure relief mechanism 240 will spray smoke and hot gas, and the second regions z2 adjacent to the first regions z1 will be affected by the discharge. By arranging the insulating members 400 on the second regions z2 on both sides of the first regions z1 where the pressure relief mechanism 240 is located, the insulating members 400 cover at least part of the busbar components 300 located in the second regions z2. Since the second regions z2 are blocked by the insulating members 400, the risk of the discharge of the pressure relief mechanism 240 accumulating in the second regions z2 to cause electrical conduction between two battery cells 200 can be reduced.

[0120] In combination with reference to Figure 8 , Figure 8As shown in the schematic view of the three-dimensional structure of the comparative battery device 10' in the examples of the present application, when the comparative target insulation member M' is subjected to the force of the discharge, there is a risk that the comparative target insulation member M' is lifted, thereby causing the protection of the target insulation member M' to fail. Therefore, in the examples of the present application, since the stress release structure Y is defined on the target insulation member M, when the target insulation member M is subjected to the force of the discharge, the force acting on the target insulation member M can be reduced through the stress release structure Y, so that the target insulation member M can more reliably block the discharge. Therefore, the insulation member 400 provided in the examples of the present application can reduce the risk of insulation failure of the two adjacent battery monomers 200, thereby improving the use reliability of the battery device 10.

[0121] According to some examples of the present application, please refer to Figure 9 , Figure 9 As shown in the schematic view of the structure of the target insulation member M in some examples of the present application, the target insulation member M includes a plurality of insulation portions M1. At least part of the side adjacent to each other of at least two adjacent insulation portions M1 is not connected, and defines a stress release structure Y. The part of the side adjacent to each other of the two adjacent insulation portions M1 which is not connected can define a cut q or a gap g.

[0122] For example, Figure 9 As shown in the schematic view of the structure of the target insulation member M, the target insulation member M includes two insulation portions M1, and part of the side adjacent to each other of the two insulation portions M1 is connected, and part of the side adjacent to each other of the two insulation portions M1 is not connected. Of course, as shown in Figure 10 , Figure 10 As shown in the schematic view of the structure of the target insulation member M in some examples of the present application, the side adjacent to each other of the two insulation portions M1 is not connected. The connection mode of the side adjacent to each other of the two adjacent insulation portions M1, the number of insulation portions M1, and the number of stress release structures Y can be set according to specific use, which is not specifically limited herein.

[0123] In this way, by defining the stress release structure Y through the at least two adjacent insulation portions M1, when one of the insulation portions M1 is subjected to the force of the discharge of the pressure relief mechanism 240, at least part of the force can be released through the stress release structure Y, thereby reducing the force acting on the other insulation portion M1, and further reducing the risk of insulation failure of the two adjacent battery monomers 200. In addition, by providing a plurality of insulation portions M1, the insulation portion M1 can be protected according to the use, so that the protection form is more flexible.

[0124] According to some examples of the present application, please continue to refer to Figure 9 and Figure 10 The part of the side adjacent to each other of the at least two adjacent insulation portions M1 which is not connected defines a gap g, and the gap g constitutes the stress release structure Y.

[0125] The gap g can be located in one of the second regions z2, in the other of the second regions z2, or at the joint of the two second regions z2, and can be set according to specific use, which is not specifically limited herein. In the embodiments of the present application, the gap g is located at the joint of the two second regions z2, as shown in Figure 5 and Figure 7 . The size of the gap g can also be determined according to the required protection capability and the degree of stress release, which is not specifically limited herein.

[0126] In this way, the stress release structure Y formed by the gap g provides a space for stress release, thereby reducing the constraint on the connection of the two insulation parts M1. At the same time, the size of the gap g can be more flexibly set according to the use requirement, thereby releasing the force acting on the corresponding insulation part M1.

[0127] According to some embodiments of the present application, please refer to Figure 11 , Figure 11 is a structural schematic view of the target insulation piece M in yet some embodiments of the present application, and the unconnected part of at least two adjacent insulation parts M1 adjacent to each other defines a slit q, and the slit q forms a stress release structure Y.

[0128] The “slit q” refers to a structure formed by the sides of two adjacent insulation parts M1 adjacent to each other abutting against each other, or a structure formed by the sides of two adjacent insulation parts M1 adjacent to each other forming a slit. At the slit q, the two insulation parts M1 can be separated from each other. Compared with the gap g shown in some of the foregoing embodiments, the slit q can be regarded as a more narrow structure.

[0129] Exemplarily, Figure 11 is shown to illustrate that the target insulation piece M includes three insulation parts M1, and two slits q are formed. Please refer to Figure 12 , Figure 12 is a structural schematic view of the target insulation piece M in further embodiments of the present application, Figure 12 is shown to illustrate that the target insulation piece M includes four insulation parts M1, and three slits q are formed. Please refer to Figure 13 , Figure 13 is a structural schematic view of the target insulation piece M in still some embodiments of the present application, Figure 13 is shown to illustrate that the target insulation piece M includes two insulation parts M1, and one slit q is formed. Among them, Figure 11 the part of the two adjacent insulation parts M1 adjacent to each other is not connected, Figure 12 and Figure 13The side of each of the two adjacent insulation portions M1 adjacent to each other is not connected. The number and arrangement of the slits q can be set according to specific use, and are not specifically limited herein.

[0130] In this way, when one of the insulation portions M1 is subjected to the force of the discharge of the pressure relief mechanism 240, the continuity of the structure of the insulation member 400 is changed due to the presence of the slit q, so that at least part of the stress can be released at the slit q, thereby reducing the force acting on the other of the insulation portions M1.

[0131] According to some embodiments of the present application, please continue to refer to Figure 7 The side of each of the two adjacent insulation portions M1 adjacent to each other is not connected. The number and arrangement of the slits q can be set according to specific use, and are not specifically limited herein. Figure 7 In this way, when one of the insulation portions M1 is subjected to the force of the discharge of the pressure relief mechanism 240, the continuity of the structure of the insulation member 400 is changed due to the presence of the slit q, so that at least part of the stress can be released at the slit q, thereby reducing the force acting on the other of the insulation portions M1.

[0132] The abutment region w refers to a region near the adjacent position of the two adjacent second regions z2. The abutment region w can be a region defined at the adjacent position of the two adjacent second regions z2, or can be a region including the adjacent position of the two adjacent second regions z2, a region near the adjacent position of one of the second regions z2, and a region near the adjacent position of the other of the second regions z2. That is, the stress release structure Y can correspond to a region near the adjacent position of one or the other of the second regions z2, or can correspond to the adjacent position of the two second regions z2, as long as it corresponds to the abutment region w, and is not specifically limited herein.

[0133] For example, as shown in FIG. 6, the stress release structure Y can correspond to the abutment region w, and the stress release structure Y can be a gap g. Figure 7 For example, as shown in FIG. 6, the stress release structure Y can correspond to the abutment region w, and the stress release structure Y can be a gap g.

[0134] Since the abutment region w is located substantially at the abutment of the two adjacent battery monomers 200, the two adjacent insulation portions M1 substantially correspond to the second regions z2 of the two adjacent battery monomers 200, respectively, and the two adjacent second regions z2 can be protected by different insulation portions M1, respectively. In this way, even if the insulation portion M1 on one of the second regions z2 is subjected to the force of the discharge, the force transmitted from the insulation portion M1 on one of the second regions z2 to the insulation portion M1 on the other of the second regions z2 can be released due to the stress release structure Y corresponding to the abutment region w, thereby improving the protection reliability of the insulation portion M1 on the other of the second regions z2, and further reducing the risk of insulation failure of the two adjacent battery monomers 200.

[0135] According to some embodiments of the present application, please continue to refer to Figures 9 to 13The stress release structure Y has a starting end e1 and a terminal end e2. At least one of the starting end e1 and the terminal end e2 is arranged through an edge of the target insulation M in a direction in which the first surface b1 points to the target insulation M.

[0136] For example, the direction in which the first surface b1 points to the target insulation M can be regarded as a thickness direction of the target insulation M. As shown in Figures 9 to 13 Figure 9 and Figure 11 , the starting end e1 or the terminal end e2 of the stress release structure Y is arranged through an edge of the target insulation M in the thickness direction of the target insulation M. In this way, a structure in which a side portion of two adjacent insulation portions M1 in the target insulation M is not connected to each other is formed. As shown in Figure 10 , Figure 12 and Figure 13 , the starting end e1 and the terminal end e2 of the stress release structure Y are respectively arranged through edges of the target insulation M in the thickness direction of the target insulation M. In this way, a structure in which a side of two adjacent insulation portions M1 in the target insulation M is not connected to each other is formed. In the case where the target insulation M includes two insulation portions M1, two structures that are independent and separable from each other are formed.

[0137] In the case where the starting end e1 and the terminal end e2 of the stress release structure Y are respectively arranged through edges of the target insulation M in the thickness direction of the target insulation M, the starting end e1 and the terminal end e2 of the same stress release structure Y can be arranged through the same edge or different edges of the target insulation M. In the embodiments of the present application, the case where the starting end e1 and the terminal end e2 of the same stress release structure Y are arranged through different edges of the target insulation M is shown in combination with reference to Figure 10 , Figure 12 and Figure 13 . The structure form and the number of the stress release structure Y can be arranged according to specific use requirements, which are not specifically limited herein. It can be understood that the more the stress release structures Y, the more beneficial it is to release stress. The fewer the stress release structures Y, the more beneficial it is to arrange the target insulation M.

[0138] In this way, in the case where one of the starting end e1 and the terminal end e2 of the stress release structure Y is arranged through an edge of the target insulation M, the part of the target insulation M is separable, which can further reduce the transmission of the force between the parts of the target insulation M. In the case where both the starting end e1 and the terminal end e2 of the stress release structure Y are arranged through edges of the target insulation M, the target insulation M has at least two separable parts, so that when one of the parts is subjected to the force, the one part will not further transmit the force to the other part, thereby further improving the protection capability of the target insulation M. ​

[0139] According to some embodiments of the present application, please continue to refer to Figures 5 to 7 , the plurality of battery monomers 200 are arranged into columns along the first direction F1 and arranged into rows along the second direction F2. The first direction F1 and the second direction F2 intersect with each other. The two second regions z2 of the first surface b1 are located on both sides of the first region z1 along the first direction F1. Among them, there are at least target insulation pieces M in the plurality of insulation pieces 400, which are arranged on the two second regions z2 adjacent along the first direction F1; and / or, there are at least target insulation pieces M in the plurality of insulation pieces 400, which are arranged on the two second regions z2 adjacent along the second direction F2.

[0140] In the embodiments of the present application, in combination with reference to Figure 4 , the first direction F1 is the length direction of the battery monomer 200, the second direction F2 is the width direction of the battery monomer 200, and the third direction F3 is the height direction of the battery monomer 200. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. It can be understood that the first direction F1, the second direction F2 and the third direction F3 are only exemplary and other embodiments can also be used, which are not specifically limited here.

[0141] For example, in combination with reference to Figure 7 , the case where the target insulation piece M is arranged on the two second regions z2 adjacent along the first direction F1 is illustrated. In combination with reference to Figure 14 , Figure 14 is a structural schematic diagram of the battery device 10 in some embodiments of the present application, illustrating the case where the first target insulation piece M and the second target insulation piece M along the first direction F1 are arranged on the second regions z2 adjacent along the second direction F2, and the rest of the target insulation pieces M are arranged on the second regions z2 adjacent along the first direction F1. It can be understood that when the stress release structure Y is configured as a gap g or a slit q, and the stress release structure Y is used for the abutment area w, as in the target insulation piece M in Figure 7 and the third to sixth target insulation pieces M arranged along the first direction F1 in Figure 14 , the insulation part M1 of these target insulation pieces M can be regarded as being arranged on the second regions z2 adjacent along the second direction F2.

[0142] In this way, by arranging the target insulation piece M on the two second regions z2 adjacent along the first direction F1 and / or the second direction F2, the stress in the corresponding direction can be released. It can be understood that when the second region z2 of the first surface b1 is located on both sides of the first region z1 along the first direction F1, it is not only more conducive to reducing the risk of insulation failure of the two adjacent columns of battery monomers 200, but also facilitates the arrangement of the target insulation piece M.

[0143] According to some embodiments of the present application, please continue to refer toFigure 7 and Figure 14 In each column of battery monomers 200, the second regions z2 adjacent in the second direction F2 constitute a sub-target region. In two adjacent columns of battery monomers 200, the two adjacent sub-target regions constitute a target region T. The target region T is covered by a target insulation member M.

[0144] The target insulation member M covering the target region T can be one or multiple. For example, Figure 7 The case where one target insulation member M covers the target region T is illustrated in FIG. 8. For another example, Figure 14 The case where some target regions T are covered by two target insulation members M and some target regions T are covered by one target insulation member M is illustrated in FIG. 9. The arrangement can be set according to specific use cases, and is not specifically limited here.

[0145] In this way, since the target region T is constituted by the sub-target regions of the two adjacent columns of battery monomers 200, the target insulation member M is arranged for the target region T, which can reduce the risk of insulation failure of the two adjacent columns of battery monomers 200.

[0146] According to some embodiments of the present application, please continue to refer to Figure 7 and Figure 14 In the first and last columns of battery monomers 200, one insulation member 400 is arranged on the sub-target region on the outer side. The insulation member 400 can or can not be a target insulation member M. For example, Figure 7 and Figure 14 The case where the insulation member 400 arranged on the sub-target region on the outer side is not a target insulation member M is illustrated in FIG. 10.

[0147] In this way, insulation protection can be performed while facilitating the installation of the insulation member 400.

[0148] According to some embodiments of the present application, please continue to refer to Figures 5 to 7 The target insulation member M includes two insulation portions M1 arranged independently and spaced apart from each other. In the same target region T, the two insulation portions M1 of the target insulation member M are correspondingly arranged on the two sub-target regions. In the same target insulation member M, the space between the two insulation portions M1 constitutes at least part of a stress release structure Y.

[0149] The stress release structure Y on the target insulation member M includes the part constituted by the space between the two insulation portions M1, and can also include a structure formed on the insulation portion M1 that can be used to release stress. For example, Figures 5 to 7 The case where the stress release structure Y is constituted by the space between the two insulation portions M1 is illustrated in FIG. 11. At this time, the space can also be regarded as the gap g illustrated in some embodiments described above.

[0150] By configuring the two insulation parts M1 capped on the two sub-target areas to be independent and spaced from each other, in the case that one of the battery monomers 200 is in thermal runaway, when the exhaust acts on the insulation part M1 corresponding to the one of the battery monomers 200, the force borne by the insulation part M1 will not be transmitted to the other insulation part M1, thereby further reducing the risk of insulation failure of the two adjacent rows of battery monomers 200. It can be understood that, since the two insulation parts M1 are configured to be independent and spaced from each other, it is also convenient to manufacture and install the insulation part M1.

[0151] According to some embodiments of the present application, please continue to refer to Figure 7 and Figure 14 , and refer to Figure 15 , Figure 15 is a perspective view of the battery device 10 in some embodiments of the present application, among all the target areas T, there is a first target area T1, and a target insulation part M is capped on the first target area T1; and / or, among all the target areas T, there is a second target area T2, and a plurality of target insulation parts M are capped on the second target area T2, and all the target insulation parts M on the same second target area T2 are arranged along the second direction F2.

[0152] Exemplarily, Figure 7 and Figure 14 schematically show the case that a target insulation part M is capped on the first target area T1. It can be understood that, in Figure 14 schematically shows the case of the first target insulation part M and the second target insulation part M arranged along the first direction F1, since the first target insulation part M and the second target insulation part M each include three independent insulation parts M1, thus, the six insulation parts M1 can be regarded as arranged in rows and columns along the first direction F1 and the second direction F2, and thus, the target area T corresponding to the first target insulation part M and the second target insulation part M (i.e., the first target area T1) can also be regarded as the second target area T2. For ease of understanding, in Figure 14 , the second target area T2 is marked. For example, Figure 15 schematically shows the case that all the target areas T are the second target area T2 (not marked), at this time, all the target insulation parts M on the same second target area T2 are arranged along the second direction F2. In Figure 15 , three target insulation parts M are provided on the same second target area T2. It can be understood that different insulation protection structures can be formed by target insulation parts M with different stress release structures Y, which are not specifically limited here.

[0153] By covering the first target area T1 with a single target insulating element M, the protective capability is improved while also facilitating manufacturing. By covering the second target area T2 with multiple target insulating elements M, the transmission of force between the target insulating elements M can be further reduced, thereby further improving the protective capability of the target insulating elements M.

[0154] According to some embodiments of this application, please refer to Figure 16 and Figure 17 , Figure 16 for Figure 5 The diagram shows a three-dimensional structure of the battery device 10 with the insulating sheet removed. Figure 17 for Figure 16 A partially enlarged structural diagram at point B shows that two adjacent battery cells 200 along the second direction F2 are electrically connected through a busbar component 300.

[0155] For example, with Figure 16 and Figure 17 For example, the multiple battery cells 200 can be electrically connected in series.

[0156] Thus, when the target area T is covered with the target insulation element M, even if one of the sub-target areas in the target area T is lifted by the force of the emission, the potential change between two adjacent battery cells 200 along the second direction F2 is small, which helps to reduce the speed and possibility of thermal runaway propagating from one battery cell 200 to another battery cell 200.

[0157] According to some embodiments of this application, please refer to Figures 18 to 20 , Figure 18 This application also provides a perspective view of the battery device 10 in some embodiments. Figure 19 for Figure 18 The diagram shows a partial exploded view of the battery device 10. Figure 20 for Figure 18 The schematic diagram of the top view of the battery device 10 shown shows that the battery device 10 also includes at least one limiting member 500 corresponding to at least one insulating member 400. The limiting member 500 has a limiting portion 510, which is located on the side of the corresponding insulating member 400 opposite to the first surface b1.

[0158] The limiting member 500 is a component used to limit the movement of the corresponding insulating member 400. Figure 18 and Figure 20 For example, this illustration shows the scenario where each target insulating element M is limited by a limiting element 500. Of course, each insulating element 400 could also be limited by a limiting element 500. The specific configuration can be adjusted according to the application; no particular restrictions are imposed here.

[0159] By arranging the limiting member 500 corresponding to the insulation member 400, when the insulation member 400 is subjected to a force, the insulation member 400 can be limited by the limiting member 500, thereby reducing the risk of the insulation member 400 being lifted in the second region z2, improving the occurrence of the sparking phenomenon, and improving the protection capability of the insulation member 400.

[0160] According to some embodiments of the present application, please continue to refer to Figures 18 to 20 The insulation member 400 corresponding to the limiting member 500 includes a target insulation member M, and the target insulation member M is provided with a mounting gap X. The limiting member 500 has a mounting portion 520 connected with a limiting portion 510. The second region z2 covered by the target insulation member M and the busbar component 300 define a mounting groove in communication with the mounting gap X, and the mounting portion 520 is fixed in the mounting groove through the mounting gap X.

[0161] Specifically, the limiting portion 510 and the mounting portion 520 can constitute a bending structure, so that the mounting portion 520 can extend into the mounting groove, and the limiting portion 510 is outside the mounting groove, and the limiting portion 510 can limit the target insulation member M. Exemplarily, the bending angle formed by the limiting portion 510 and the mounting portion 520 can be a right angle, an acute angle or an obtuse angle. In the case that the bending angle formed by the limiting portion 510 and the mounting portion 520 is a right angle, not only the mounting space can be more effectively utilized, but also the limiting portion 510 can limit the target insulation member M more easily.

[0162] By arranging the limiting member 500 corresponding to the target insulation member M, not only the protection capability of the target insulation member M can be further improved, but also the limiting member 500 can be installed more easily. In addition, since the mounting gap X is arranged by using the target insulation member M, the space utilization can also be improved.

[0163] According to some embodiments of the present application, please continue to refer to Figures 18 to 20 The target insulation member M includes a plurality of insulation portions M1 independent from each other, and at least two adjacent insulation portions M1 define the mounting gap X.

[0164] It can be understood that, in combination with the content shown in some of the foregoing embodiments, the spacing between the two adjacent insulation portions M1 can be regarded as constituting a stress release structure Y, that is, the mounting gap X can be regarded as constituting at least part of the stress release structure Y.

[0165] Since the plurality of insulation portions M1 are independent from each other, the structure defined by the plurality of insulation portions M1 is at least part of the stress release structure Y, and the transmission of the force between the insulation portions M1 can be improved. Since the mounting gap X is defined by at least two adjacent insulation portions M1 independent from each other, not only the limiting member 500 can be installed, but also the spacing between the at least two adjacent insulation portions M1 can be further increased, and the stress release effect can be further improved.

[0166] According to some embodiments of the present application, please refer to Figure 21 and Figure 22 , Figure 21 for Figure 18 the front structural schematic diagram of the battery device 10, Figure 22 for Figure 21 the local enlarged structural schematic diagram at I in FIG. 1, the arrangement direction of the two insulation parts M1 defining the mounting interval X is defined as the target direction. Along the target direction, the limiting part 510 corresponding to the target insulation part M has a first size h. The first size h is greater than or equal to 3 mm; and / or the limiting part 500 corresponding to the target insulation part M has a plurality of limiting parts 510; for the two insulation parts M1 defining the mounting interval X, at least one limiting part 510 is arranged on the side away from the first surface b1.

[0167] For example, in the embodiments of the present application, the target direction can be regarded as the first direction F1. The first size h can be 3 mm, 4 mm, 8 mm or 10 mm. The upper limit of the first size h can be set according to the corresponding space size and use requirements, which is not limited here. For example, Figure 19 , Figure 20 and Figure 22 for example, the limiting part 500 has two limiting parts 510. Of course, the limiting part 500 can also have other numbers of limiting parts 510, which are not limited here.

[0168] In this way, by controlling the first size h, the limiting effect of the limiting part 510 can be further improved; by configuring the limiting part 500 to have a plurality of limiting parts 510, two insulation parts M1 can be limited by one limiting part 500, and at the same time, the structure is more simple and convenient to install.

[0169] It should be noted that in combination with Figure 16 and Figure 17 , in the arrangement mode of the busbar component 300 shown in Figure 16 and Figure 17 , by configuring the target insulation part M as two insulation parts M1 independently and spaced apart from each other, and arranging the limiting part 500 between the two insulation parts M1 independently and spaced apart from each other, the limiting part 500 can realize the mutual separation between the adjacent busbar components 300 on the adjacent two rows of battery monomers 200, as shown in Figure 20 , by using Figure 16 and Figure 17In the arrangement of the busbar assembly 300 as shown in the schematic view, the plurality of limit members 500 are arranged to be staggered along the first direction F1, thereby improving the reliability of the busbar assembly 300. Of course, in some other embodiments, along the second direction F2, the size of the limit member 500 can be substantially the same as the size of the interval formed between two mutually independent and spaced insulating portions M1. The position and size of the limit member 500 can be set according to the specific use, which is not specifically limited herein.

[0170] According to some embodiments of the present application, please continue to refer to Figure 18 and Figure 20 , one limit member 500 is arranged at the mounting interval X; or, a plurality of limit members 500 are arranged at the mounting interval X.

[0171] For example, as shown in Figure 20 and Figure 20 , one limit member 500 is arranged at the mounting interval X.

[0172] In this way, in the case of arranging one limit member 500, not only the structure is simpler, but also the installation is facilitated. In the case of arranging a plurality of limit members 500, not only the limit can be performed for different positions and different directions, but also the limit reliability can be improved.

[0173] According to some embodiments of the present application, please continue to refer to Figure 23 , at least part of the stress release structure Y is formed by the mounting interval X. That is, the mounting interval X can form part or all of the stress release structure Y. In the case of the mounting interval X forming part of the stress release structure Y, there can also be a stress release structure Y that does not form the mounting interval X. For example, the stress release structure Y can also include the aforementioned cut seam q, and can also include a gap g without arranging the limit member 500.

[0174] In this way, not only the limit member 500 can be installed by using the mounting interval X, but also the stress release can be achieved by using the mounting interval X. In this way, the overall structure is simpler.

[0175] According to some embodiments of the present application, please refer to Figure 23 , Figure 22 is a schematic view of the structure of the limit member 500 cooperating with the insulating portion M1 in some other embodiments of the present application, and the limit portion 510 abuts against the target insulating member M.

[0176] In this way, by abutting the limit portion 510 against the target insulating member M, the limit portion 510 can provide an abutting force to limit the target insulating member M. In addition, the space utilization can also be improved.

[0177] According to some embodiments of the present application, please continue to refer toFigure 22 The limiting part 510 and the target insulation part M have a preset interval d therebetween, and the preset interval d is less than or equal to 10 mm.

[0178] For example, the preset interval d can be 1 mm, 2 mm, 4 mm, 6 mm, 8 mm or 10 mm. The preset interval d can be set according to specific use cases, and is not specifically limited herein.

[0179] By setting the preset interval d between the limiting part 510 and the target insulation part M, the target insulation part M can be prevented from moving away from the first surface b1, and the limiting part 500 can be easily installed. It can be understood that by controlling the size of the preset interval d, the target insulation part M can be limited to different degrees, and a certain deformable space can be provided for the target insulation part M, so that the overall structure is more flexible.

[0180] According to some embodiments of the present application, please continue to refer to Figure 5 and 23 At least one of the battery monomer 200 and the busbar component 300 is bonded with the insulation part 400. For example, the insulation part 400 can be bonded with the first surface b1 of the battery monomer 200. For another example, the insulation part 400 can be bonded with the first surface b1 and the busbar component 300.

[0181] In this way, the fixation of the insulation part 400 can be achieved by bonding.

[0182] Of course, in some other embodiments, the insulation part 400 can also be connected with the battery monomer 200 and / or the busbar component 300 by other ways such as welding, and is not specifically limited herein.

[0183] According to some embodiments of the present application, please continue to refer to Figures 15 to 21 , Figure 5 , Figures 15 to 21 The plurality of battery monomers 200 are arranged into columns along a first direction F1 and arranged into rows along a second direction F2. The first direction F1 and the second direction F2 intersect with each other. The battery device 10 further comprises a spacing part 600, and the spacing part 600 is arranged between adjacent two rows and / or two columns of battery monomers 200. The spacing part 600 is configured as a heat insulation part, or the spacing part 600 is configured as a thermal management component.

[0184] The thermal management component can be a liquid cooling plate, or a heat pipe or the like. The thermal management component can perform thermal management (such as heat dissipation or heat preservation, etc.) on the battery monomer 200.

[0185] For example, Figures 5 to 7 , Figures 16 to 22 , Figures 5 to 7For example, the two adjacent rows of battery cells 200 are provided with spacers 600, so that all the spacers 600 are arranged in the second direction F2. Of course, the two adjacent columns of battery cells 200 can also be provided with spacers 600, so that all the spacers 600 are arranged in the first direction F1. Alternatively, every two adjacent battery cells 200 can be provided with spacers 600, so that the spacers 600 can form a grid-like structure. The arrangement can be determined according to the specific use, and is not specifically limited herein.

[0186] In the case where the spacers 600 are configured as thermal insulation members, the heat generated by the battery cell 200 that has occurred thermal runaway is inhibited from spreading to the adjacent battery cell 200 by the thermal insulation effect of the thermal insulation members. In the case where the spacers 600 are configured as thermal management members, the adjacent battery cells 200 can be subjected to thermal management by the thermal management effect of the thermal management members.

[0187] According to some embodiments of the present application, please refer to ​ The battery includes a plurality of battery cells 200, a plurality of busbar members 300, a plurality of insulating members 400, and a plurality of spacers 600. All the battery cells 200 are arranged in columns along the first direction F1 and arranged in rows along the second direction F2, and the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other. The battery cell 200 has a first surface b1, a pressure relief mechanism 240, and an electrode terminal 211. The first surface b1 includes a first region z1 and a second region z2 located on both sides of the first region z1 along the first direction F1. The pressure relief mechanism 240 is arranged in the first region z1. Two electrode terminals 211 are arranged in two second regions z2, respectively. All the battery cells 200 are connected in series, and two adjacent battery cells 200 along the second direction F2 are electrically connected by one busbar member 300. All the insulating members 400 are arranged in the first direction F1, and adjacent second regions z2 in two adjacent columns of battery cells 200 form target regions T. One insulating member 400 is arranged on each target region T, and one insulating member 400 is arranged on the second region z2 located at the edge of the first column of battery cells 200 along the first direction F1. One insulating member 400 is arranged on the second region z2 located at the edge of the last column of battery cells along the first direction F1. The insulating member 400 on the target region T is a target insulating member M. The target insulating member M includes two insulating portions M1 arranged in the first direction F1, the two insulating portions M1 are independent of each other, and the opposite sides of the two insulating portions M1 define a stress release structure Y. The two adjacent rows of battery cells 200 are provided with spacers 600, and the spacers 600 are thermal insulation members or thermal management members.

[0188] According to some embodiments of the present application, please refer to ​ , and ​Different from the foregoing, the battery device 10 further comprises a plurality of limiting members 500, each of which comprises a mounting portion 520 and a limiting portion 510 arranged at two ends of the mounting portion 520 along the first direction F1, and a bending structure is formed between the two limiting portions 510 and the mounting portion 520. In the same target insulating member M, the interval between the two insulating portions M1 constitutes a mounting interval X, and the mounting portion 520 extends into the mounting groove through the mounting interval X and is fixedly connected with the battery monomer 200 and / or the busbar member 300. The two limiting portions 510 correspond to the two insulating portions M1 one by one, and the limiting portion 510 is located on the side of the corresponding insulating portion M1 away from the first surface b1. The preset interval d between the limiting portion 510 and the corresponding insulating portion M1 in the third direction F3 is not more than 10 mm.

[0189] Based on the same inventive concept, the application provides a power consumption device comprising the battery device 10 in any of the foregoing embodiments. The battery device 10 is used to supply power to the power consumption device. The power consumption device can be any of the devices or systems mentioned above to which the battery device 10 is applied. The power consumption device also has the advantages of the battery device 10 in any of the foregoing embodiments, which will not be repeated here.

[0190] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing 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 application, and they should all be covered in the scope of the claims and the specification of the application. In particular, each technical feature mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device (10) characterized by, The application relates to a battery pack comprising: a plurality of battery cells (200) having a first surface (b1) comprising a first region (z1) and a second region (z2) located on both sides of the first region (z1), and a pressure relief mechanism (240) provided in the first region (z1); a busbar component (300) electrically connecting the plurality of battery cells (200), a portion of the busbar component (300) connected to the battery cell (200) being located in the second region (z2) of the battery cell (200); and a plurality of insulating members (400) covering at least part of the busbar component (300) in the second region (z2), at least one target insulating member (M) covering two adjacent second regions (z2) being present in the plurality of insulating members (400), and a stress release structure (Y) being defined on the target insulating member (M).

2. The battery device (10) according to claim 1, characterized in that The target insulating member (M) comprises a plurality of insulating portions (M1), and at least part of a side of at least two adjacent insulating portions (M1) is not connected and defines the stress release structure (Y).

3. The battery device (10) according to claim 2, characterized in that The unconnected part of the side of the at least two adjacent insulating portions (M1) defines a gap (g), and the gap (g) constitutes the stress release structure (Y).

4. The battery device (10) according to claim 2, characterized in that The unconnected part of the side of the at least two adjacent insulating portions (M1) defines a slit (q), and the slit (q) constitutes the stress release structure (Y).

5. The battery device (10) according to any one of claims 1-4, characterized in that, Two adjacent second regions (z2) define an abutment region (w) on a side adjacent to each other. The stress release structure (Y) is arranged corresponding to the abutment region (w).

6. The battery device (10) according to any one of claims 1-4, characterized in that The stress release structure (Y) has a starting end (e1) and an ending end (e2). At least one of the starting end (e1) and the ending end (e2) is arranged through an edge of the target insulating member (M) in a direction of the target insulating member (M) along the first surface (b1).

7. The battery device (10) according to any one of claims 1 to 4, characterized in that The plurality of battery cells (200) are arranged in a column along a first direction (F1) and arranged in a row along a second direction (F2), and the first direction (F1) and the second direction (F2) intersect with each other. Two second regions (z2) of the first surface (b1) are located on both sides of the first region (z1) along the first direction (F1). At least one target insulating member (M) covering two adjacent second regions (z2) along the first direction (F1) is present in the plurality of insulating members (400); and / or At least one target insulating member (M) covering two adjacent second regions (z2) along the second direction (F2) is present in the plurality of insulating members (400).

8. The battery device (10) according to claim 7, characterized in that Each column of the battery monomers (200) is sequentially adjacent to the second area (z2) along the second direction (F2), and the second area (z2) constitutes a sub-target area; two adjacent columns of the battery monomers (200) are adjacent to two sub-target areas, and the two sub-target areas constitute a target area (T); The target area (T) is provided with the target insulation piece (M) on the cover.

9. The battery device (10) according to claim 8, characterized in that The target insulation piece (M) includes two insulation parts (M1) which are independent and spaced apart from each other; In the same target area (T), the two insulation parts (M1) of the target insulation piece (M) are correspondingly provided on the two sub-target areas; in the same target insulation piece (M), the spacing between the two insulation parts (M1) constitutes at least part of the stress release structure (Y).

10. The battery device (10) according to claim 8, characterized in that All the target areas (T) include a first target area (T1), and the first target area (T1) is provided with a target insulation piece (M) on the cover; and / or All the target areas (T) include a second target area (T2), and the second target area (T2) is provided with a plurality of target insulation pieces (M) on the cover, and all the target insulation pieces (M) on the same second target area (T2) are arranged along the second direction (F2).

11. The battery device (10) according to claim 8, characterized in that Two adjacent battery monomers (200) along the second direction (F2) are electrically connected by a busbar component (300).

12. The battery device (10) according to any one of claims 1-4, characterized in that The battery device (10) further comprises at least one limiting piece (500) corresponding to at least one insulation piece (400); The limiting piece (500) has a limiting part (510), and the limiting part (510) is located on the side of the corresponding insulation piece (400) away from the first surface (b1).

13. The battery device (10) according to claim 12, characterized in that The insulation piece (400) corresponding to the limiting piece (500) includes a target insulation piece (M), and the target insulation piece (M) is provided with a mounting interval (X); the limiting piece (500) has a mounting part (520) connected to the limiting part (510); The second area (z2) covered by the target insulation piece (M) and the busbar component (300) define a mounting groove in communication with the mounting interval (X), and the mounting part (520) is fixed in the mounting groove through the mounting interval (X).

14. The battery device (10) according to claim 13, characterized in that The target insulation piece (M) includes a plurality of independent insulation parts (M1), and at least two adjacent insulation parts (M1) define the mounting interval (X).

15. The battery device (10) according to claim 14, characterized in that The arrangement direction of the two insulation parts (M1) defining the mounting interval (X) is a target direction; along the target direction, the limiting part (510) corresponding to the target insulation piece (M) has a first size (h); the first size (h) is greater than or equal to 3mm; and / or The limiting piece (500) corresponding to the target insulation piece (M) has a plurality of limiting parts (510); for the two insulation parts (M1) defining the mounting interval (X), at least one limiting part (510) is arranged on the side of each of the two insulation parts (M1) away from the first surface (b1).

16. The battery device (10) according to claim 13, characterized in that The mounting interval (X) is provided with one limiting piece (500); or The mounting interval (X) is provided with a plurality of limiting pieces (500).

17. The battery device (10) according to claim 13, characterized in that At least part of the stress release structure (Y) is composed of the mounting interval (X).

18. The battery device (10) according to claim 12, characterized in that The limiting part (510) abuts against the target insulation piece (M); or The limiting part (510) and the target insulation piece (M) have a preset interval (d), and the preset interval (d) satisfies less than or equal to 10 mm.

19. The battery device (10) according to any one of claims 1-4, characterized by At least one of the battery monomer (200) and the busbar component (300) is bonded with the insulation piece (400).

20. The battery (10) according to any one of claims 1-4, characterized in that, The plurality of battery monomers (200) are arranged into columns along a first direction (F1) and arranged into rows along a second direction (F2); the first direction (F1) and the second direction (F2) intersect with each other; The battery (10) further comprises a spacer (600), and the spacer (600) is arranged between two adjacent rows and / or two adjacent columns of the battery monomers (200). The spacer (600) is configured as a heat insulation piece; or the spacer (600) is configured as a thermal management component.

21. An electrical device, comprising: The battery device (10) according to any one of claims 1-20.

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