Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment. The battery includes a case, at least one battery cell group, and a partition member. The box body comprises a bottom wall; the battery monomer group is accommodated in the box body and comprises a plurality of battery monomers; the partition component is accommodated in the box body and is used for bearing a battery monomer group, a first pressure relief mechanism is arranged at one end, close to the partition component, of each battery monomer, a collection cavity is formed between the partition component and the bottom wall, and the collection cavity is used for collecting emissions of the battery monomers when the first pressure relief mechanism is actuated; wherein the bottom wall is provided with reinforcing ribs, and the reinforcing ribs are used for supporting the separating parts. The reinforcing ribs can improve the structural strength of the battery and improve the reliability of the battery.

Description

Technical Field

[0001] This application relates to the field of batteries, and more particularly, to a battery and an electrical device using the same. Background Art

[0002] With the development of new energy technologies, batteries have been increasingly widely used. Batteries with high energy density, high reliability, long service life, and environmental friendliness have been widely applied in passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, battery swapping stations, engineering manufacturing, intelligent devices, etc. At the same time, they have also promoted the technological development and research in the fields of communication terminals, medical devices, energy development, etc.

[0003] In the process of battery production, how to improve battery reliability is a technical problem that needs to be solved urgently. Summary of the Utility Model

[0004] An embodiment of this application provides a battery and an electrical device using the same, which can effectively improve the structural strength of the battery and enhance battery reliability.

[0005] In a first aspect, an embodiment of this application provides a battery, which includes a box body, at least one battery cell group, and a partition member; the box body includes a bottom wall; the battery cell group is accommodated in the box body, and the battery cell group includes a plurality of battery cells; the partition member is accommodated in the box body, and the partition member is used to carry the battery cell group. A first pressure relief mechanism is provided at one end of the battery cell close to the partition member. A collection cavity is formed between the partition member and the bottom wall, and the collection cavity is used to collect the emissions of the battery cell when the first pressure relief mechanism is actuated; wherein, the bottom wall is provided with reinforcing ribs, and the reinforcing ribs are used to support the partition member.

[0006] In the above technical solution, a collection cavity is formed between the partition member and the bottom wall to collect the emissions of the battery cell, so as to achieve electrical separation and improve battery reliability. Further, the bottom wall is provided with reinforcing ribs. Compared with a thin wall, the reinforcing ribs can improve the local stiffness and strength of the bottom wall, thereby enhancing the supporting strength of the bottom wall for the partition member and the load-bearing capacity of the partition member for the battery cell group. In other words, part of the gravity of the battery cell group is dispersed to the reinforcing ribs, so that the partition member is not easily deformed, and thus the structural strength of the battery can be improved and battery reliability can be enhanced.

[0007] In some embodiments, the plurality of battery cells in the battery cell group are arranged along a first direction, and the reinforcing ribs extend along the first direction.

[0008] In the above technical solution, the extending direction of the reinforcing rib is the same as the arranging direction of the plurality of battery cells, so that the reinforcing rib can bear the gravity of multiple or all of the battery cells in the same battery cell group, and improve the bearing effect of the partition member on a single battery cell group.

[0009] In some embodiments, a plurality of the reinforcing ribs are provided, and the plurality of reinforcing ribs are arranged at intervals along a second direction, and the second direction intersects with the first direction.

[0010] In the above technical solution, the plurality of reinforcing ribs arranged at intervals along the second direction can provide relatively uniform support for the partition member.

[0011] In some embodiments, the battery further includes a second pressure relief mechanism, and the second pressure relief mechanism is arranged on the bottom wall, and the second pressure relief mechanism is used for discharging the emissions in the collection chamber.

[0012] In the above technical solution, the second pressure relief mechanism enables the emissions in the collection chamber to be discharged outside the box body, and can reduce the risk of the box body cracking or the battery exploding caused by excessive emissions in the collection chamber.

[0013] In some embodiments, each of the reinforcing ribs is provided with a first communication portion, and the first communication portion penetrates through the reinforcing rib along the second direction to communicate the two sides of the reinforcing rib.

[0014] In the above technical solution, while the reinforcing rib plays a supporting role, it does not affect the discharge of the emissions. Specifically, by making the first communication portion penetrate through the reinforcing rib along the second direction, the two sides of the reinforcing rib are communicated, so that the emissions of the battery cells farther from the second pressure relief mechanism can flow through the first communication portion of one or more reinforcing ribs in the direction of the second pressure relief mechanism, and thus be discharged outside the box body.

[0015] In some embodiments, each of the reinforcing ribs is provided with a plurality of first communication portions, and the plurality of first communication portions are arranged at intervals along the first direction.

[0016] In the above technical solution, the plurality of first communication portions can reduce the degree of blocking of the emissions and improve the discharge efficiency of the emissions.

[0017] In some embodiments, the first communication portion includes a first groove, and the first groove is arranged on the side of the reinforcing rib close to the partition member.

[0018] In the above technical solution, the first groove is arranged on the side of the reinforcing rib close to the partition member, so that the gaseous emissions can easily pass through the first groove, while the solid emissions are not easy to pass through, thereby reducing the influence of the solid emissions on other battery cells in the discharge path or alleviating the blockage of the first communication portion by the solid emissions.

[0019] In some embodiments, the plurality of reinforcing ribs are divided into multiple groups, and a plurality of battery cell groups are provided. Each group of reinforcing ribs corresponds to one battery cell group, and in the thickness direction of the bottom wall, the projection of each group of reinforcing ribs falls within the projection of the corresponding battery cell group.

[0020] In the above technical solution, each group of reinforcing ribs corresponds to one battery cell group, which can improve the bearing stability of the partition member for the battery cell group.

[0021] In some embodiments, each group of reinforcing ribs includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib and the second reinforcing rib are arranged at intervals in the second direction, and a first diversion channel is formed between the first reinforcing rib and the second reinforcing rib. The projection of the first pressure relief mechanism on the bottom wall is located between the first reinforcing rib and the second reinforcing rib.

[0022] In the above technical solution, the projection of the first pressure relief mechanism on the bottom wall is located between the first reinforcing rib and the second reinforcing rib, which can reduce the shielding of the first pressure relief mechanism by the reinforcing ribs, enabling the emissions of the battery cell to enter the first diversion channel. At the same time, the distance between the first reinforcing rib and the second reinforcing rib is small, which can increase the flow rate of the emissions in the first heat conduction channel and accelerate the discharge of the emissions from the collection chamber or from the box body.

[0023] In some embodiments, each group of reinforcing ribs further includes a third reinforcing rib and a fourth reinforcing rib. The third reinforcing rib and the fourth reinforcing rib are arranged at intervals in the second direction, and the first reinforcing rib and the second reinforcing rib are located between the third reinforcing rib and the fourth reinforcing rib.

[0024] In the above technical solution, the third reinforcing rib and the fourth reinforcing rib can further improve the support strength of the partition member.

[0025] In some embodiments, the battery further includes a support member disposed between the bottom wall and the partition member. The support member is used to support the partition member, and the support member is located between two adjacent groups of reinforcing ribs.

[0026] In the above technical solution, in addition to the reinforcing ribs supporting the partition member, the partition member is also supported by the support member, thereby improving the structural stability of the battery.

[0027] In some embodiments, in the thickness direction of the bottom wall, the projection of the support member overlaps with the projections of two adjacent battery cell groups.

[0028] In the above technical solution, by enabling a single support member to bear the gravity of two adjacent battery modules, the number of support members is simplified, which is beneficial to improving the energy density of the battery.

[0029] In some embodiments, the support member is provided with a second communication portion that penetrates the support member along the second direction to communicate both sides of the support member.

[0030] In the above technical solution, while the support member plays a supporting role, it does not affect the emission of emissions. Specifically, by making the second communication portion penetrate the support member along the second direction, both sides of the support member are communicated, so that the emissions of the battery cells farther from the second pressure relief mechanism can flow through the second communication portions of one or more support members in the direction of the second pressure relief mechanism, and thus are discharged out of the box.

[0031] In some embodiments, the support member extends along the first direction, and the support member is provided with a plurality of second communication portions, and the plurality of second communication portions are arranged at intervals along the first direction.

[0032] In the above technical solution, the plurality of second communication portions can reduce the degree of blocking of the emissions and improve the emission efficiency of the emissions.

[0033] In some embodiments, the second communication portion includes a second groove, and the second groove is provided on a side of the support member close to the partition member.

[0034] In the above technical solution, the second groove is provided on a side of the support member close to the partition member, so that the gas emissions are easy to pass through, while the solid emissions are not easy to pass through, thereby reducing the influence of the solid emissions on other battery cells on the emission path or alleviating the blockage of the emission path caused by the solid emissions.

[0035] In some embodiments, the reinforcing rib is welded to the partition member.

[0036] In the above technical solution, the reinforcing rib and the partition member can improve the connection strength between the reinforcing rib and the partition member and improve the structural stability of the battery.

[0037] In some embodiments, the reinforcing rib is integrally formed with the bottom wall.

[0038] In the above technical solution, the reinforcing rib is integrally formed with the bottom wall, which reduces the preparation difficulty of the bottom wall, and at the same time the bottom wall has higher structural strength.

[0039] In some embodiments, the partition member is provided with a first through hole corresponding to the first pressure relief mechanism, and the first through hole communicates with the collection chamber.

[0040] In the above technical solution, the first through hole communicates with the collection chamber, so that the emissions of the battery cells can conveniently enter the collection chamber.

[0041] In some embodiments, a flow channel for accommodating a heat exchange medium is formed inside the partition member.

[0042] In the above technical solution, in addition to bearing the battery cell group, the partition member can also adjust the temperature of the battery cell group, thereby improving battery reliability.

[0043] In some embodiments, the box body includes a first sub-box body and a second sub-box body. The first sub-box body includes the bottom wall. The second sub-box body is connected to the first sub-box body, and a sealing portion is formed between the second sub-box body and the first sub-box body. The partition member is connected to the first sub-box body to form a first connection portion, and the first connection portion is located inside the sealing portion.

[0044] In the above technical solution, if the first connection portion is located outside the sealing portion, external foreign objects are likely to enter the box through the gap between the partition member and the box body, which requires a high sealing requirement for the first connection portion. In this embodiment, by making the first connection portion located inside the sealing portion, the sealing requirement for the first connection portion is reduced.

[0045] In a second aspect, an embodiment of the present application provides an electrical device, which includes the above battery, and the battery is used to supply power to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0047] Figure 1 It is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0048] Figure 2 It is an exploded schematic diagram of a battery according to some embodiments of the present application;

[0049] Figure 3 It is a schematic structural diagram of a battery according to some embodiments of the present application;

[0050] Figure 4 For Figure 3 an enlarged view of part A in

[0051] Figure 5 It is a schematic structural diagram of a battery cell group, a partition member and a first sub-box body according to an embodiment of the present application;

[0052] Figure 6Schematic diagram of the bottom wall provided with reinforcing ribs in some embodiments of the present application;

[0053] Figure 7 Assembly schematic diagram of the partition member and the first sub - box in some embodiments of the present application;

[0054] Figure 8 Schematic diagram of the battery in some other embodiments of the present application;

[0055] Figure 9 Schematic diagram of the structure of the first sub - box and the support member in some other embodiments of the present application.

[0056] Icons: 100 - battery; 10 - battery cell group; 11 - battery cell; 111 - first pressure relief mechanism; 112 - electrode terminal; 20 - box body; 21 - first sub - box; 211 - bottom wall; 22 - second sub - box; 23 - accommodation space; 23a - collection chamber; 24 - sealing part; 25 - first connection part; 40 - partition member; 41 - first through - hole; 50 - second pressure relief mechanism; 30 - reinforcing rib; 30a - first reinforcing rib; 30b - second reinforcing rib; 30c - third reinforcing rib; 30d - fourth reinforcing rib; 311 - first groove; E - first diversion channel; F - second diversion channel; 60 - support member; 611 - second groove; Y - first direction; X - second direction; Z - thickness direction of the bottom wall; 1000 - vehicle; 200 - motor; 300 - controller.

[0057] The drawings are not drawn to actual scale. Detailed implementation manners

[0058] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of the present application are intended to cover non - exclusive inclusion. The terms "first", "second", etc. in the specification, claims or drawings of the present application are used to distinguish different objects, rather than to describe a specific order or primary - secondary relationship.

[0060] Reference to "embodiment" in this application means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0061] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "attached" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] In the description of this application, it should be noted that unless otherwise stated, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0063] The term "or" in this application is merely a description of the association relationship of associated objects, indicating that there can be two relationships. For example, A or B can mean: the two situations of existing A alone and existing B alone.

[0064] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of simplicity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components in the embodiments of this application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to this application.

[0065] The "a plurality of" that appears in this application refers to two or more (including two).

[0066] In this application, battery cells may include, but are not limited to, lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries. Battery cells include, but are not limited to, cylindrical, flat, rectangular, or other shapes. Battery cells are generally packaged in cylindrical or prismatic shapes.

[0067] A battery cell consists of an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrodes. Metal ions (such as lithium ions) are inserted and removed from the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0068] The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab.

[0069] Taking lithium-ion batteries as an example, the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0070] The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as the negative electrode tab.

[0071] The negative electrode current collector can be a metal foil or a composite current collector. For example, the metal foil can be silver-plated aluminum, silver-plated stainless steel, stainless steel, copper, aluminum, carbon, carbon, nickel, or titanium. The negative electrode active material can be carbon or silicon, for example.

[0072] To ensure, to a certain extent, that a large current can pass through without fusing, the number of positive electrode tabs is multiple and they are stacked together, and the number of negative electrode tabs is multiple and they are stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be of a wound structure or a laminated structure.

[0073] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. A battery generally includes a box body for encapsulating one or more battery cells. The box body can reduce the influence of liquid or other foreign matters on the charging or discharging of the battery cells.

[0074] In some embodiments, the battery can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0075] In some embodiments, the battery can be a battery pack. The battery pack includes a box body and battery cells, and the battery cells or battery modules are accommodated in the box body.

[0076] In some embodiments, multiple battery cells can first be integrated into at least one battery module, and then the battery module is installed in the box body to form the shape of a battery pack. In this implementation manner, auxiliary structural members such as cross beams can be provided between the battery modules to improve the installation stability of the battery modules in the box body.

[0077] In some embodiments, the box body can be a part of the chassis structure of a vehicle. For example, a part of the box body can become at least a part of the floor of the vehicle, or a part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0078] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0079] The development of battery technology needs to consider various design factors simultaneously. For example, performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate, etc. In addition, the reliability of the battery also needs to be considered.

[0080] For a battery cell, the main safety hazards come from the charging and discharging processes, and there is also a suitable environmental temperature design. To effectively avoid unnecessary losses, there are generally at least three protection measures for the battery cell. Specifically, the protection measures at least include a switching element, selecting an appropriate separator material, and a pressure relief mechanism. The switching element refers to an element that can stop the charging or discharging of the battery when the temperature or resistance inside the battery cell reaches a certain threshold. The separator is used to isolate the positive electrode plate and the negative electrode plate, and can automatically dissolve the micron-scale (even nanoscale) micropores attached to it when the temperature rises to a certain value, so that metal ions cannot pass through the separator, terminating the internal reaction of the battery cell.

[0081] The pressure relief mechanism on the battery cell refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell reaches a predetermined threshold. This threshold design varies according to different design requirements. The threshold may depend on one or several of the materials of the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell. The pressure relief mechanism can take forms such as an explosion-proof valve, explosion-proof sheet, gas valve, pressure relief valve, or safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0082] The "actuation" mentioned in this application means that the pressure relief mechanism on the battery cell generates an action or is activated to a certain state, so that the internal pressure and temperature of the battery cell can be released. The actions generated by the pressure relief mechanism can include but are not limited to: at least a part of the pressure relief mechanism breaks, shatters, is torn, or opens, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell will be discharged outward from the actuated part as emissions. In this way, the battery cell can be depressurized and cooled under controlled pressure or temperature, thereby avoiding potential more serious accidents.

[0083] The emissions from the battery cell mentioned in this application include but are not limited to: electrolyte, dissolved or fragmented positive and negative electrode plates, fragments of the separator, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0084] The pressure relief mechanism on the battery cell has an important impact on the reliability of the battery. For example, when short circuits, overcharging, etc. occur, it may cause thermal runaway inside the battery cell, resulting in a sudden increase in pressure or temperature. In this case, the internal pressure and temperature can be released outward through the actuation of the pressure relief mechanism to prevent the battery cell from exploding or catching fire.

[0085] In the current design solution of the pressure relief mechanism, the main focus is on releasing the high pressure and high heat inside the battery cell, that is, discharging the emissions to the outside of the battery cell. However, in order to ensure the output voltage or current of the battery, multiple battery cells are often required and the multiple battery cells are electrically connected through a busbar component. The emissions discharged from inside the battery cell may cause a short circuit in the remaining battery cells. For example, when the discharged metal chips electrically connect two busbar components, it will cause a short circuit in the battery, thus there is a safety hazard. Moreover, the high-temperature and high-pressure emissions are discharged in the direction where the pressure relief mechanism of the battery cell is provided, and more specifically, they can be discharged in the direction towards the area where the pressure relief mechanism is actuated. The power and destructive force of such emissions may be very large, and may even be sufficient to break through one or more structures in this direction, causing secondary hazards.

[0086] In view of this, in order to solve the problem of low battery reliability, an embodiment of the present application provides a technical solution. In this technical solution, the battery includes a box body, at least one battery cell group and a partition member. The battery cell group and the partition member are both accommodated in the box body. The partition member bears the battery cell group, and a collection cavity is formed between the partition member and the bottom wall of the box body. The collection cavity is used to collect all or most of the emissions of the battery cell when the pressure relief mechanism of the battery cell is actuated, which is beneficial to achieve electrical separation, thereby improving the battery reliability.

[0087] Since the collection cavity is a cavity structure, the partition member is prone to deformation, and the battery structure has low strength, resulting in low battery reliability.

[0088] In view of this, on the basis of the above embodiment, reinforcing ribs are further provided on the bottom wall. The reinforcing ribs can improve the local stiffness and strength of the bottom wall, thereby improving the support strength of the bottom wall for the partition member and enhancing the bearing capacity of the partition member for the battery cell group. In other words, part of the gravity of the battery cell group is dispersed on the reinforcing ribs, so that the partition member is not easily deformed, and thus the structural strength of the battery can be improved and the battery reliability can be enhanced.

[0089] The technical solution disclosed in the embodiment of the present application is applicable to but not limited to batteries and electrical equipment using batteries.

[0090] The electrical equipment can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or an extended-range electric vehicle, etc.; The spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, etc.; The electric toy includes a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric airplane toy, etc.; The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinding wheel, an electric wrench, an electric screwdriver, a hammer drill, an impact electric drill, a concrete vibrator and a planer, etc.

[0091] For the convenience of description, the following embodiments will take the electrical equipment as the vehicle 1000 as an example for description.

[0092] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the vehicle 1000 according to some embodiments of the present application. A battery 100 is arranged inside the vehicle 1000, and the battery 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000.

[0093] The vehicle 1000 may further include a controller 300 and a motor 200. The controller 300 is used to control the battery 100 to supply power to the motor 200. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0094] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0095] In some embodiments, please refer to Figure 2 , Figure 2 , which is an exploded schematic diagram of the battery 100 according to some embodiments of the present application. The battery 100 includes a plurality of battery cells 11. The plurality of battery cells 11 can be connected in series, in parallel or in a combination of series and parallel. Among them, a combination of series and parallel means that there are both series and parallel connections among the plurality of battery cells 11.

[0096] In some embodiments, the battery 100 may further include a busbar component (not shown in the figure). The plurality of battery cells 11 can be electrically connected through the busbar component to achieve series, parallel or combined series and parallel connections of the plurality of battery cells 11.

[0097] The busbar component can be a metal conductor, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0098] In some embodiments, the battery 100 may further include a box body 20 for accommodating the battery cells 11. The box body 20 may include a first sub-box body 21 and a second sub-box body 22, and the first sub-box body 21 and the second sub-box body 22 are covered with each other to define an accommodation space 23 for accommodating the battery cells 11. Of course, the connection between the first sub-box body 21 and the second sub-box body 22 can be sealed by a sealing element (not shown in the figure), and the sealing element can be a sealing ring, sealant, etc.

[0099] Among them, the first sub-box body 21 and the second sub-box body 22 can be in various shapes, such as a cuboid, a cylinder, etc. The first sub-box body 21 can be a hollow structure with one side open, and the second sub-box body 22 can also be a hollow structure with one side open. The open side of the second sub-box body 22 is covered on the open side of the first sub-box body 21, then the box body 20 with the accommodation space 23 is formed. Of course, it can also be that the first sub-box body 21 is a hollow structure with one side open, the second sub-box body 22 is a plate-like structure, and the second sub-box body 22 is covered on the open side of the first sub-box body 21, then the box body 20 with the accommodation space 23 is formed.

[0100] Figure 3 Schematic diagram of the structure of the battery 100 according to some embodiments of the present application; Figure 4 is Figure 3 an enlarged view of part A in; Figure 5 Schematic diagram of the structure of the battery cell group 10, the partition member 40 and the first sub-box body 21 according to an embodiment of the present application; Figure 6 Schematic diagram of the structure of the bottom wall 211 provided with the reinforcing rib 30 according to some embodiments of the present application.

[0101] Referring to Figures 3 to 6 , an embodiment of the present application provides a battery 100, which includes a box body 20, at least one battery cell group 10 and a partition member 40. The box body 20 includes a bottom wall 211. The battery cell group 10 is accommodated in the box body 20, and the battery cell group 10 includes a plurality of battery cells 11. The partition member 40 is accommodated in the box body 20, and the partition member 40 is used to carry the battery cell group 10. A first pressure relief mechanism 111 is provided at one end of the battery cell 11 close to the partition member 40. A collection cavity 23a is formed between the partition member 40 and the bottom wall 211, and the collection cavity 23a is used to collect the emissions of the battery cell 11 when the first pressure relief mechanism 111 is actuated; wherein, the bottom wall 211 is provided with a reinforcing rib 30, and the reinforcing rib 30 is used to support the partition member 40.

[0102] The bottom wall 211 can be the wall of the first sub-box body 21 or the wall of the second sub-box body 22. Exemplarily, the first sub-box body 21 is disposed below the second sub-box body 22, and the bottom wall 211 is the wall of the first sub-box body 21.

[0103] One or more battery cell groups 10 can be provided. Exemplarily, as Figure 5 shown, four battery cell groups 10 are provided. Each battery cell group 10 includes a plurality of battery cells 11, and the plurality of battery cells 11 can be arranged along the first direction Y. Each battery cell group 10 may further include a pair of end plates (not shown in the figure) and a pair of side plates (not shown in the figure). The pair of end plates are spaced apart along the first direction Y, and the plurality of battery cells 11 are located between the pair of end plates. The pair of side plates are spaced apart along the second direction X, and the plurality of battery cells 11 are located between the pair of side plates. In other words, the pair of end plates and the pair of side plates fix the plurality of battery cells 11 around the plurality of battery cells 11 to form a battery cell group 10.

[0104] The battery cell 11 includes a first pressure relief mechanism 111, and the first pressure relief mechanism 111 can be a part of the housing of the battery cell 11 or a split structure with the housing of the battery cell 11.

[0105] The partition member 40 is an isolation member in the box body 20. The partition member 40 can physically divide the accommodation space 23 in the box body 20. At the same time, the partition member 40 also serves to carry the battery cell group 10, that is, the partition member 40 bears the gravity of the battery cell group 10. The dividing member can divide the interior of the box body 20 into multiple spaces. For example, the partition member 40 divides the accommodation space 23 into a collection chamber 23a and an electrical chamber. The battery cell group 10 is accommodated in the electrical chamber. The collection chamber 23a and the electrical chamber are located on both sides of the dividing member. The collection chamber 23a is used to collect the emissions of the battery cells 11, which is beneficial to electrical separation.

[0106] The partition member 40 can be determined according to the shape of the box body 20. For example, the box body 20 is approximately a cuboid, and the partition member 40 is also approximately rectangular. Of course, in other embodiments, the partition member 40 can also be set to be circular or irregular, etc.

[0107] The partition member 40 can be connected to the box body 20 by means of bonding, welding, screwing, etc.

[0108] The bottom wall 211 is provided with a reinforcing rib 30. The reinforcing rib 30 is a component that improves the local structural strength of the bottom wall 211 and also supports the partition member 40. The reinforcing rib 30 is located on the side of the bottom wall 211 facing the partition member 40, and the reinforcing rib 30 can be accommodated in the collection chamber 23a.

[0109] The reinforcing rib 30 can extend in a straight line, and the reinforcing rib 30 can also extend in a curve.

[0110] The reinforcing rib 30 and the bottom wall 211 can be made of the same material. The shape of the reinforcing rib 30 can be various.

[0111] The reinforcing rib 30 is used to support the partition member 40, which means that the reinforcing rib 30 bears the gravity of the partition member 40. The reinforcing rib 30 can be in direct contact with the partition member 40, or the reinforcing rib 30 can be connected to the partition member 40 by means such as bonding and welding.

[0112] The number of the reinforcing ribs 30 can be one or more. Exemplarily, as Figure 6 shown, a plurality of reinforcing ribs 30 are provided. The plurality of reinforcing ribs 30 can be arranged at equal intervals or at unequal intervals. The reinforcing rib 30 can be arranged at the corner of the bottom wall 211, or the reinforcing rib 30 can be arranged in the middle of the bottom wall 211.

[0113] In this embodiment, the partition member 40 and the bottom wall 211 form a collection cavity 23a to collect the emissions of the battery cells 11, so as to achieve electrical separation and improve the reliability of the battery 100.

[0114] Furthermore, the bottom wall 211 is provided with the reinforcing rib 30. Compared with the thin wall, the reinforcing rib 30 can improve the local stiffness and strength of the bottom wall 211, thereby improving the supporting strength of the bottom wall 211 for the partition member 40 and improving the bearing capacity of the partition member 40 for the battery cell group 10. In other words, a part of the gravity of the battery cell group 10 is dispersed on the reinforcing rib 30, so that the partition member 40 is not easily deformed, and thus the structural strength of the battery 100 can be improved and the reliability of the battery 100 can be improved.

[0115] In some embodiments, the battery cell 11 further includes an electrode terminal 112, and the electrode terminal 112 is arranged on a side of the battery cell 11 away from the partition member 40.

[0116] Referring to Figure 6 , in some embodiments, the plurality of battery cells 11 in the battery cell group 10 are arranged along the first direction Y, and the reinforcing rib 30 also extends along the first direction Y.

[0117] Understandably, the extending direction of the reinforcing rib 30 is the same as the arranging direction of the plurality of battery cells 11 in the battery cell group 10.

[0118] Both ends of the reinforcing rib 30 along the first direction Y can be connected to the wall portion of the box body 20, or can be arranged with a gap from the wall portion of the box body 20.

[0119] The extending direction of the reinforcing rib 30 is the same as the arranging direction of the plurality of battery cells 11, so that the reinforcing rib 30 can bear the gravity of multiple or all of the battery cells 11 in the same battery cell group 10, and improve the bearing effect of the partition member 40 on a single battery cell group 10.

[0120] Referring to Figure 6, in some embodiments, a plurality of reinforcing ribs 30 are provided, and the plurality of reinforcing ribs 30 are arranged at intervals along the second direction X, and the second direction X intersects the first direction Y.

[0121] The corresponding relationship between the reinforcing ribs 30 and the battery module group 10 can be set as required. The plurality of battery module groups 10 can correspond to the plurality of reinforcing ribs 30 one by one, that is, one battery module group 10 corresponds to one reinforcing rib 30. Of course, one battery module group 10 can also correspond to a plurality of reinforcing ribs 30.

[0122] The plurality of reinforcing ribs 30 are arranged at intervals along the second direction X, and can be arranged at equal intervals or at unequal intervals.

[0123] In some embodiments, the second direction X can be perpendicular to the first direction Y. At this time, the arrangement direction of the plurality of reinforcing ribs 30 is perpendicular to the arrangement direction of the plurality of battery cells 11 in a single battery module group 10. Of course, in other embodiments, the second direction X can also form an angle with the first direction Y.

[0124] The plurality of reinforcing ribs 30 arranged at intervals along the second direction X can provide relatively uniform support for the partition member 40.

[0125] Referring to Figure 6 , in some embodiments, the battery 100 further includes a second pressure relief mechanism 50, and the second pressure relief mechanism 50 is arranged on the bottom wall 211, and the second pressure relief mechanism 50 is used to discharge the emissions in the collection chamber 23a.

[0126] The second pressure relief mechanism 50 is a component used to discharge the emissions in the collection chamber 23a to improve the reliability of the battery 100. Different from the first pressure relief mechanism 111, the first pressure relief mechanism 111 is applied at the battery cell 11 level, and the first pressure relief mechanism 111 provides overpressure protection for the battery cell 11, while the second pressure relief mechanism 50 is applied at the battery 100 level, and the second pressure relief mechanism 50 provides overpressure protection for the battery 100. The structures of the first pressure relief mechanism 111 and the second pressure relief mechanism 50 can be the same or different.

[0127] The space of the collection chamber 23a is limited. The second pressure relief mechanism 50 enables the emissions in the collection chamber 23a to be discharged outside the box body 20, and can reduce the risk of the box body 20 cracking or the battery 100 exploding caused by excessive emissions in the collection chamber 23a.

[0128] In some embodiments, each reinforcing rib 30 is provided with a first communication portion, and the first communication portion penetrates the reinforcing rib 30 along the second direction X to enable the two sides of the reinforcing rib 30 to communicate.

[0129] The first communication part can be a hole, a notch, etc. formed in the reinforcing rib 30, or both a hole and a notch exist, as long as the two sides of the reinforcing rib 30 can be communicated. One or more first communication parts can be provided.

[0130] In this embodiment, while the reinforcing rib 30 plays a supporting role, it does not affect the discharge of emissions. Specifically, by making the first communication part penetrate the reinforcing rib 30 along the second direction X, the two sides of the reinforcing rib 30 are communicated, so that the emissions of the battery cell 11 farther from the second pressure relief mechanism 50 can flow through one or more first communication parts of the reinforcing rib 30 in the direction of the second pressure relief mechanism 50, and then be discharged outside the box body 20.

[0131] The position of the first communication part presets a path for the discharge of emissions, which is conducive to the directional discharge of emissions. Compared with the bottom wall 211 without the reinforcing rib 30, the bottom wall 211 is provided with the reinforcing rib 30 and the reinforcing rib 30 has the first communication part. The emissions of the battery cell 11 in the adjacent battery cell group 10 passed by on the discharge path of the battery cell 11 in thermal runaway are less, and the influence on the battery cell group 10 adjacent to the battery cell 11 in thermal runaway is smaller, which is conducive to improving the reliability of the battery 100.

[0132] Specifically, in the case of not setting the reinforcing rib 30, the straight-line distance from the battery cell 11 in thermal runaway to the second pressure relief mechanism 50 is the shortest, and the emissions are discharged along this straight-line path. The number of battery cells 11 in the adjacent battery cell group 10 that have not experienced thermal runaway passed by the emissions is relatively large. And the bottom wall 211 is provided with the reinforcing rib 30 and the reinforcing rib 30 has the first communication part, so that the emissions flow through the first communication part at a specific position to the second pressure relief mechanism 50 for discharge. Therefore, the number of battery cells 11 in the adjacent battery cell group 10 that have not experienced thermal runaway passed by the emissions is relatively small.

[0133] In some embodiments, each reinforcing rib 30 is provided with a plurality of first communication parts, and the plurality of first communication parts are arranged at intervals along the first direction Y.

[0134] The first communication parts of the plurality of reinforcing ribs 30 can correspond to each other, or the first communication parts of the plurality of reinforcing ribs 30 can not correspond to each other. It should be understood that as long as the first communication part is provided, it facilitates the discharge of emissions, and whether the first communication parts of the plurality of reinforcing ribs 30 correspond to each other changes the specific discharge path.

[0135] Exemplarily, as Figure 6 shown, each reinforcing rib 30 is provided with four first communication parts.

[0136] The plurality of first communication parts can reduce the degree of shielding of the emissions and improve the discharge efficiency of the emissions.

[0137] In some embodiments, the first connecting portion includes a first groove 311, and the first groove 311 is disposed on a side of the reinforcing rib 30 close to the separating member 40.

[0138] The first groove 311 can be understood as a notch formed by the reinforcing rib 30. One or more first grooves 311 can be provided. The first groove 311 can be configured as an arc, V-shaped, U-shaped, W-shaped or irregular, etc. Exemplarily, as Figure 6 shown, the first groove 311 is configured as U-shaped.

[0139] In this embodiment, the first groove 311 is disposed on a side of the reinforcing rib 30 close to the separating member 40, so that gaseous emissions can easily pass through the first groove 311, while solid emissions are not easily passed through, thereby reducing the impact of solid emissions on other battery cells 11 in the emission path or alleviating the blockage of the first connecting portion by solid emissions.

[0140] Referring to Figure 3 and Figure 5 , in some embodiments, the plurality of reinforcing ribs 30 are divided into multiple groups, there are multiple battery cell groups 10, each group of reinforcing ribs 30 corresponds to one battery cell group 10, and along the thickness direction Z of the bottom wall, the projection of each group of reinforcing ribs 30 falls within the projection of the corresponding battery cell group 10.

[0141] Understandably, one battery cell group 10 corresponds to one group of reinforcing ribs 30. The number of reinforcing ribs 30 in one group of reinforcing ribs 30 includes but is not limited to two, three, four, five, etc. Exemplarily, as Figure 3 and Figure 5 shown, there are four battery cell groups 10, the plurality of reinforcing ribs 30 are divided into four groups, and four reinforcing ribs 30 form a group.

[0142] Each group of reinforcing ribs 30 corresponds to one battery cell group 10, which can improve the load-bearing stability of the separating member 40 on the battery cell group 10.

[0143] Referring to Figure 4 , Figure 4 shows the corresponding relationship between a group of reinforcing ribs 30 and one battery cell group 10. In some embodiments, each group of reinforcing ribs 30 includes a first reinforcing rib 30a and a second reinforcing rib 30b, the first reinforcing rib 30a and the second reinforcing rib 30b are arranged at intervals along the second direction X, a first flow guiding channel E is formed between the first reinforcing rib 30a and the second reinforcing rib 3Ob, and the projection of the first pressure relief mechanism 111 on the bottom wall 211 is located between the first reinforcing rib 30a and the second reinforcing rib 30b.

[0144] Understandably, along the second direction X, the size of the first diversion channel E is greater than or equal to the size of the first pressure relief mechanism 111. In other words, the projection of the first pressure relief mechanism 111 on the bottom wall 211 does not extend beyond the first diversion channel E.

[0145] In this embodiment, the projection of the first pressure relief mechanism 111 on the bottom wall 211 is located between the first reinforcing rib 30a and the second reinforcing rib 30b, which can reduce the shielding of the first pressure relief mechanism 111 by the reinforcing rib 30, enabling the emissions of the battery cell 11 to enter the first diversion channel E. At the same time, the distance between the first reinforcing rib 30a and the second reinforcing rib 30b is small, that is, the width of the first diversion channel E is small, which can increase the flow rate of the emissions in the first heat conduction channel and accelerate the discharge of the emissions from the collection chamber 23a or from the box body 20.

[0146] The small distance between the first reinforcing rib 30a and the second reinforcing rib 30b means that along the second direction X, the distance between the first reinforcing rib 30a and the second reinforcing rib 30b is less than the size of the battery cell group 10.

[0147] In some embodiments, along the second direction X, the width of the first diversion channel E does not exceed 1 / 2 of the size of the battery cell group 10.

[0148] In some embodiments, each group of reinforcing ribs 30 further includes a third reinforcing rib 30c and a fourth reinforcing rib 30d. The third reinforcing rib 30c and the fourth reinforcing rib 30d are arranged at intervals along the second direction X, and the first reinforcing rib 30a and the second reinforcing rib 30b are located between the third reinforcing rib 30c and the fourth reinforcing rib 30d.

[0149] The first reinforcing rib 30a and the third reinforcing rib 30c can be located on the same side of the first diversion channel E. Correspondingly, the second reinforcing rib 30b and the fourth reinforcing rib 30d are located on the other side of the first diversion channel E. A second diversion channel F can be formed between the first reinforcing rib 30a and the third reinforcing rib 30c, and another second diversion channel F can be formed between the second reinforcing rib 30b and the fourth reinforcing rib 30d. Along the second direction X, the first diversion channel E is located between the two second diversion channels F. In some embodiments, the second diversion channel F and the first diversion channel E can be interconnected. At this time, the third diversion rib and the fourth diversion member can further improve the interception degree of the solid emissions and reduce the possibility of the solid emissions passing through.

[0150] In this embodiment, the third reinforcing rib 30c and the fourth reinforcing rib 30d can further improve the support strength of the partition member 40.

[0151] Figure 8 It is a schematic structural diagram of the battery 100 according to other embodiments of the present application.

[0152] Refer toFigure 8 , in some embodiments, the battery 100 further includes a support member 60 disposed between the bottom wall 211 and the partition member 40. The support member 60 is used to support the partition member 40, and the support member 60 is located between two adjacent sets of reinforcing ribs 30.

[0153] Understandably, two adjacent sets of reinforcing ribs 30 are separated by the support member 60. Along the second direction X, the two sets of reinforcing ribs 30 are respectively located on both sides of the support member 60.

[0154] The support member 60 can correspond to the battery cell groups 10 one by one, and one support member 60 can also correspond to two battery cell groups 10.

[0155] The support member 60 can be connected to the partition member 40 and the bottom wall 211 respectively by means of bonding, welding, screwing, etc. The support member 60 can be a hollow or solid beam.

[0156] In addition to the reinforcing ribs 30 supporting the partition member 40, the partition member 40 is also supported by the support member 60, thereby improving the structural stability of the battery 100.

[0157] Refer to Figure 8 , in some embodiments, along the thickness direction Z of the bottom wall, the projection of the support member 60 overlaps with the projections of two adjacent battery cell groups 10.

[0158] The support member 60 can be located on the center line of two adjacent battery cell groups 10 to evenly bear the gravity of the two battery cell groups 10.

[0159] In this embodiment, by making a single support member 60 bear the gravity of two adjacent battery 100 modules, the number of support members 60 is simplified, which is beneficial to improving the energy density of the battery 100.

[0160] Figure 9 FIG. is a schematic structural diagram of the first sub-box 21 and the support member 60 in some other embodiments of the present application.

[0161] Refer to Figure 9 , in some embodiments, the support member 60 is provided with a second communication portion that penetrates the support member 60 along the second direction X to communicate the two sides of the support member 60.

[0162] The second communication portion can be a hole, a notch, etc. formed in the support member 60, or both a hole and a notch exist, as long as the two sides of the support member 60 can be communicated. The second communication portion can be provided with one or more.

[0163] In this embodiment, while the support member 60 plays a supporting role, it does not affect the emission of emissions. Specifically, by allowing the second communication portion to penetrate the support member 60 in the second direction X, the two sides of the support member 60 are communicated, so that the emissions of the battery cell 11 farther from the second pressure relief mechanism 50 can flow through the second communication portion of one or more support members 60 in the direction of the second pressure relief mechanism 50, and thus be discharged outside the box body 20.

[0164] In some embodiments, the support member 60 extends in the first direction Y, and the support member 60 is provided with a plurality of second communication portions, and the plurality of second communication portions are arranged at intervals in the first direction Y.

[0165] The number of the second communication portions provided includes, but is not limited to, two, three, four, five, etc.

[0166] In this embodiment, the plurality of second communication portions can reduce the degree of shielding of the emissions and improve the emission efficiency of the emissions.

[0167] In some embodiments, the second communication portion includes a second groove 611, and the second groove 611 is provided on a side of the support member 60 close to the partition member 40.

[0168] The second groove 611 can be understood as a notch formed by the support member 60. One or more second grooves 611 can be provided. The second groove 611 can be configured as an arc, a V shape, a U shape, a W shape, or a special shape, etc. Exemplarily, as Figure 9 shown, the second groove 611 is configured as a U shape.

[0169] In this embodiment, the second groove 611 is provided on a side of the support member 60 close to the partition member 40, so that the gas emissions can easily pass through, while the solid emissions are not easy to pass through, thereby reducing the influence of the solid emissions on other battery cells 11 on the emission path or alleviating the blockage of the emission path caused by the solid emissions.

[0170] In some embodiments, the reinforcing rib 30 is welded to the partition member 40.

[0171] The reinforcing rib 30 and the partition member 40 are welded to form a first welding portion. The first welding portion can extend in the first direction Y, or the first welding portion can also be arranged at intervals in the first direction Y.

[0172] Welding the reinforcing rib 30 to the partition member 40 can improve the connection strength between the reinforcing rib 30 and the partition member 40 and improve the structural stability of the battery 100.

[0173] In some embodiments, the reinforcing rib 30 is integrally formed with the bottom wall 211.

[0174] The reinforcing rib 30 is integrally formed with the bottom wall 211, which reduces the preparation difficulty of the bottom wall 211 and at the same time the structural strength of the bottom wall 211 is higher.

[0175] Referring to Figure 5 , in some embodiments, the partition member 40 is provided with a first through hole 41 corresponding to the first pressure relief mechanism 111, and the first through hole 41 communicates with the collection chamber 23a.

[0176] The first through hole 41 communicates with the collection chamber 23a, so as to facilitate the emissions of the battery cell 11 to enter the collection chamber 23a.

[0177] In other embodiments, the first through hole 41 may not be provided. For example, a weak portion (not shown in the figure) corresponding to the first pressure relief is provided on the partition member 40, and the weak portion is configured to be broken through by the emissions when the first pressure relief mechanism 111 is actuated. A notch may be provided on the surface of the partition member 40 to form the weak portion, or the thickness of the partition member 40 may be partially thinned to form the weak portion, or a recess may be provided on the surface of the partition member 40, and the bottom of the recess is the weak portion.

[0178] In some embodiments, a flow channel for accommodating a heat exchange medium is formed inside the partition member 40. At this time, the partition member 40 can be understood as a thermal management member. The partition member 40 not only carries the battery cell group 10 but also regulates the temperature of the battery cell group 10.

[0179] The heat exchange medium is a fluid, and the fluid here can be a liquid or a gas. Adjusting the temperature means heating or cooling the multiple battery cell groups 10. In the case of cooling or lowering the temperature of the battery cell group 10, the partition member 40 is used to accommodate a cooling fluid to lower the temperature of the multiple battery cell groups 10. At this time, the partition member 40 can also be called a cooling member, a cooling system or a cooling plate, etc., and the fluid it accommodates can also be called a cooling medium or a cooling fluid, and more specifically, it can be called a coolant or a cooling gas. In addition, the partition member 40 can also be used for heating to raise the temperature of the multiple battery cells 11. Optionally, the fluid can be circulated to achieve a better temperature adjustment effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol or air, etc.

[0180] In addition to the function of carrying the battery cell group 10, the partition member 40 can also regulate the temperature of the battery cell group 10, thus improving the reliability of the battery 100.

[0181] Referring to Figure 4, in some embodiments, the box body 20 includes a first sub-box body 21 and a second sub-box body 22. The first sub-box body 21 includes a bottom wall 211. The second sub-box body 22 is connected to the first sub-box body 21, and a sealing portion 24 is formed between the second sub-box body 22 and the first sub-box body 21. The partitioning member 40 is connected to the first sub-box body 21 to form a first connection portion 25, and the first connection portion 25 is located inside the sealing portion 24.

[0182] The sealing portion 24 is a sealing material or component that seals the gap between the first sub-box body 21 and the second sub-box body 22. The sealing portion 24 includes, but is not limited to, a gasket, sealant, etc.

[0183] The partitioning member 40 and the first sub-box body 21 can be connected by bonding, welding, etc. Optionally, the partitioning member 40 and the first sub-box body 21 are welded to form a first welding portion, and the first welding portion is the first connection portion 25.

[0184] If the first connection portion 25 is located outside the sealing portion 24, external foreign objects are likely to enter the box through the gap between the partitioning member 40 and the box body 20, which requires a higher sealing requirement for the first connection portion 25. In this embodiment, by making the first connection portion 25 located inside the sealing portion 24, the sealing requirement for the first connection portion 25 is reduced.

[0185] The embodiment of the present application also provides an electrical device, and the electrical device includes the above-mentioned battery 100, and the battery 100 is used to supply power to the electrical device.

[0186] Referring to Figure 3 、 Figure 4 、 Figure 7 、 Figure 8 and Figure 9 , the embodiment of the present application also provides a battery 100, and the battery 100 includes a box body 20, a partitioning member 40, a second pressure relief mechanism 50, a plurality of battery cell groups 10, and a support member 60.

[0187] The housing 20 includes a first sub-housing 21 with a single-side opening and a second sub-housing 22 with a single-side opening. The first sub-housing 21 and the second sub-housing 22 cover each other to form a storage space 23. Multiple battery cell groups 10 are housed within the housing 20, along with a partition member 40 for supporting the multiple battery cell groups 10. The battery cell groups 10 include multiple battery cells 11 arranged along a first direction Y. A first pressure relief mechanism 111 is provided at one end of the battery cells 11 proximal to the partition member 40. The first sub-housing 21 includes a bottom wall 211, side walls surrounding the bottom wall 211, and a flange located at the end of the side wall facing away from the bottom wall 211. Each battery cell group 10 is connected to the flange via a locking member, and the partition member 40 is connected to the flange via a locking member. The bottom wall 211 is located on the side of the partition member 40 facing away from the battery 100 battery pack 100. A collection chamber 23a is formed between the partition member 40 and the bottom wall 211. The collection chamber 23a is used to collect emissions from the battery cells 11 when the first pressure relief mechanism 111 is activated. The bottom wall 211 is provided with a plurality of reinforcing ribs 30, which are arranged at intervals along the second direction X, which is perpendicular to the first direction Y. Each reinforcing rib 30 extends along the first direction Y. A plurality of first grooves 311 are provided on the side of the reinforcing rib 30 near the partition member 40. The plurality of first grooves 311 are arranged at intervals along the first direction Y. Each first groove 311 extends through the reinforcing rib 30 along the second direction X, thereby connecting the two sides of the reinforcing rib 30. The reinforcing ribs 30 are integrally formed with the bottom wall 211 and welded to the partition member 40. The multiple reinforcing ribs 30 are divided into multiple groups, with each battery cell group 10 corresponding to a group of reinforcing ribs 30. Along the thickness direction Z of the bottom wall, the projection of each group of reinforcing ribs 30 falls within the projection of the corresponding battery cell group 10. Each group of reinforcing ribs 30 includes a first reinforcing rib 30a, a second reinforcing rib 30b, a third reinforcing rib 30c, and a fourth reinforcing rib 30d. The first reinforcing rib 30a and the second reinforcing rib 30b are spaced apart along the second direction X, forming a first flow guide channel E between the first and second reinforcing ribs 30a, 30b. The projection of the first pressure relief mechanism 111 on the bottom wall 211 is located between the first and second reinforcing ribs 30a, 30b. The third and fourth reinforcing ribs 30c, 30d are spaced apart along the second direction X, with the first and second reinforcing ribs 30a, 30b located between the third and fourth reinforcing ribs 30c, 30d. The first reinforcing rib 30a and the third reinforcing rib 30c are located on the same side of the first guide channel E, and the second reinforcing rib 30b and the fourth reinforcing rib 30d are located on the other side of the first guide channel E. A second guide channel F is formed between the first reinforcing rib 30a and the third reinforcing rib 30c, and another second guide channel F is formed between the second reinforcing rib 30b and the fourth reinforcing rib 30d. Along the second direction X, the first guide channel E is located between the two second guide channels F, and the second guide channel F is connected to the first guide channel E.A support member 60 is provided between two adjacent groups of reinforcing ribs 30. The support member 60 is disposed between the bottom wall 211 and the partitioning member 40. The support member 60 is used to support the partitioning member 40. Along the thickness direction Z of the bottom wall, the projection of the support member 60 overlaps with the projections of two adjacent battery cell groups 10. Each support member 60 extends along the first direction Y. A plurality of second grooves 611 are provided on the side of the reinforcing rib 30 close to the partitioning member 40. The plurality of second grooves 611 are arranged at intervals along the first direction Y. Each second groove 611 penetrates through the support member 60 along the second direction X, so that both sides of the support member 60 communicate with each other. A sealing portion 24 is formed between the first sub-box body 21 and the second sub-box body 22. The partitioning member 40 is welded to the first sub-box body 21 to form a first welding portion. The first welding portion is disposed around the partitioning member 40. The first welding portion is located on the side of the sealing portion 24 close to the accommodation space 23.

[0188] It should be noted that, without conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0189] The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that, Comprising: A box body, including a bottom wall; At least one battery cell group, accommodated in the box body, the battery cell group including a plurality of battery cells; A partition member, accommodated in the box body, the partition member being used to carry the battery cell group, a first pressure relief mechanism being provided at one end of the battery cell close to the partition member, a collection cavity being formed between the partition member and the bottom wall, the collection cavity being used to collect the emissions of the battery cell when the first pressure relief mechanism is actuated; Wherein, the bottom wall is provided with reinforcing ribs, and the reinforcing ribs are used to support the partition member.

2. The battery according to claim 1, characterized in that, The plurality of battery cells in the battery cell group are arranged in a first direction, and the reinforcing ribs extend in the first direction.

3. The battery according to claim 2, wherein A plurality of the reinforcing ribs are provided, and the plurality of reinforcing ribs are arranged at intervals in a second direction, the second direction intersecting the first direction.

4. The battery according to claim 3, characterized in that, The battery further includes: A second pressure relief mechanism, provided on the bottom wall, the second pressure relief mechanism being used to release the emissions of the collection cavity.

5. The battery according to claim 4, characterized in that, Each of the reinforcing ribs is provided with a first communication portion, the first communication portion penetrating the reinforcing rib in the second direction to communicate the two sides of the reinforcing rib.

6. The battery according to claim 5, characterized in that, Each of the reinforcing ribs is provided with a plurality of first communication portions, and the plurality of first communication portions are arranged at intervals in the first direction.

7. The battery according to claim 6, characterized in that, The first communication portion includes a first groove, and the first groove is provided on the side of the reinforcing rib close to the partition member.

8. The battery according to claim 3, characterized in that, The plurality of reinforcing ribs are divided into multiple groups, and a plurality of battery cell groups are provided. Each group of reinforcing ribs corresponds to one battery cell group, and in the thickness direction of the bottom wall, the projection of each group of reinforcing ribs falls within the projection of the corresponding battery cell group.

9. The battery according to claim 8, characterized in that, Each group of reinforcing ribs includes a first reinforcing rib and a second reinforcing rib, the first reinforcing rib and the second reinforcing rib being arranged at intervals in the second direction, a first flow guiding channel being formed between the first reinforcing rib and the second reinforcing rib, and the projection of the first pressure relief mechanism on the bottom wall being located between the first reinforcing rib and the second reinforcing rib.

10. The battery according to claim 9, characterized in that, Each group of reinforcing ribs further includes a third reinforcing rib and a fourth reinforcing rib, the third reinforcing rib and the fourth reinforcing rib being arranged at intervals in the second direction, and the first reinforcing rib and the second reinforcing rib being located between the third reinforcing rib and the fourth reinforcing rib.

11. The battery according to claim 8, wherein The battery further includes: A support member, provided between the bottom wall and the partition member, the support member being used to support the partition member, the support member being located between adjacent two groups of reinforcing ribs.

12. The battery according to claim 11, characterized in that, In the thickness direction of the bottom wall, the projection of the support member overlaps with the projections of two adjacent battery cell groups.

13. The battery according to claim 12, characterized in that, The support member is provided with a second communication portion, the second communication portion penetrating the support member in the second direction to communicate the two sides of the support member.

14. The battery according to claim 13, wherein The support member extends in the first direction, and the support member is provided with a plurality of second communication portions, and the plurality of second communication portions are arranged at intervals in the first direction.

15. The battery according to claim 13, characterized in that, The second communication portion includes a second groove, and the second groove is provided on the side of the support member close to the partition member.

16. The battery according to any one of claims 1-15, characterized in that, The reinforcing rib is welded to the partition member.

17. The battery according to any one of claims 1-15, characterized in that, The reinforcing rib is integrally formed with the bottom wall.

18. The battery according to any one of claims 1-15, characterized in that, The separating component is provided with a first through hole corresponding to the first pressure relief mechanism, and the first through hole communicates with the collection chamber.

19. The battery according to claim 18, wherein A flow channel for accommodating a heat exchange medium is formed inside the separating component.

20. The battery according to any one of claims 1-15, characterized in that, The box body includes a first sub-box body and a second sub-box body. The first sub-box body includes the bottom wall. The second sub-box body is connected to the first sub-box body, and a sealing portion is formed between the second sub-box body and the first sub-box body. The separating component is connected to the first sub-box body to form a first connection portion, and the first connection portion is located inside the sealing portion.

21. An electrical device, characterized in that, It includes the battery according to any one of claims 1-19, and the battery is used to supply power to the electrical equipment.

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