CN220510154U - Battery box, battery and power consumption device - Google Patents

Abstract

The application provides a battery box, a battery and an electric device. The battery box includes body and paster structure, the body includes first bottom plate, first curb plate and first turn-ups, first bottom plate and first curb plate enclose into the first accommodation space that can be used for holding battery module, first turn-ups are connected in the first curb plate back of the body and are kept away from first accommodation space extension from the one end of first bottom plate, the both ends interval setting of first curb plate is enclosed into the notch, the paster structure includes second curb plate and second turn-ups, the second curb plate is located the notch and is connected in first bottom plate and first curb plate, the second turn-ups is connected in the first curb plate back of the body and is kept away from the one end of first bottom plate, and extend towards first accommodation space, second turn-ups and first turn-ups cooperate in order to keep the sealing performance of battery box, and second curb plate and second turn-ups enclose into second accommodation space, second accommodation space and first accommodation space intercommunication, in order to improve the inner space of battery box, improve the practicality of battery box.

Description

Battery box, battery and power consumption device

Technical Field

The application relates to the technical field of batteries, in particular to a battery box, a battery and an electric device.

Background

The lithium ion power battery has the performances of high working voltage, large specific energy, small volume, light weight, long cycle life, low self discharge rate, no memory effect, no pollution and the like, and is used by a plurality of power equipment manufacturers.

Currently, battery modules are required to be placed in a battery box, and as the battery capacity and the battery integration level are improved, the internal space of the battery box is more and more tense, which results in that the internal space of the battery box still needs to be improved.

Disclosure of Invention

In view of the above, the present application provides a battery box, a battery, and an electric device, which can improve the internal space of the battery box and the practicability of the battery box.

In a first aspect, the present application provides a battery box comprising: the body comprises a first bottom plate, a first side plate and a first flanging, wherein the first side plate is connected with the first bottom plate and surrounds a first accommodating space with one end open in a first direction; the patch structure comprises a second side plate and a second flanging, wherein the second side plate is positioned at the notch and connected with the first bottom plate and the first side plate, the second flanging is connected with one end of the first side plate, which is away from the first bottom plate, and extends towards the first accommodating space, the second side plate and the second flanging are enclosed to form a second accommodating space, and the second accommodating space is communicated with the first accommodating space.

In the technical scheme of this application embodiment, the battery box includes body and paster structure, the body includes first bottom plate, first curb plate and first turn-ups, first bottom plate and first curb plate enclose into the first accommodation space that can be used for holding battery module, first turn-ups are connected in the first curb plate back of the body and deviate from first accommodation space and extend, the both ends interval of first curb plate sets up and enclose into the notch, the paster structure includes second curb plate and second turn-ups, the second curb plate is located the notch and is connected in first bottom plate and first curb plate, the second turn-ups is connected in the first curb plate back of the body and is separated from the one end of first bottom plate, and extend towards first accommodation space, second turn-ups and first turn-ups cooperate in order to keep the sealing performance of battery box, and second curb plate and second turn-ups enclose into second accommodation space, second accommodation space and first accommodation space intercommunication, in order to improve the inner space of battery box, improve the practicality of battery box.

In some embodiments, the patch structure further includes a second bottom plate disposed on a side of the second side plate facing away from the second flange in the first direction, the second bottom plate being connected between the first bottom plate and the second side plate such that the second side plate is connected to the first bottom plate through the second bottom plate.

In the technical scheme of this application embodiment, the paster structure still includes the second bottom plate, and the second bottom plate is connected between first bottom plate and second curb plate to make the second curb plate pass through the second bottom plate and connect in first bottom plate, with the volume that improves second accommodation space, improve the inner space of battery box, improve the practicality of battery box.

In some embodiments, the second bottom plate includes an extension section and a connection section arranged in a thickness direction of the second side plate, the extension section is disposed between the connection section and the second side plate, and the connection section is stacked on one side of the first bottom plate in the first direction and connected to the first bottom plate.

In the technical scheme of this application embodiment, the second bottom plate includes extension section and linkage segment, and the linkage segment superposes in one side of first bottom plate in the first direction to connect in first bottom plate, in order to improve the connection reliability of paster structure and body.

In some embodiments, the dimension L1 of the connecting section is 5mm or more in the thickness direction of the second side plate.

In the technical scheme of this application embodiment, the size of linkage segment is greater than or equal to 5mm to improve because the linkage segment size is undersized, lead to paster structure and body connection reliability not enough's problem.

In some embodiments, the second side plate includes a panel and side plates, the two side plates are disposed on two sides of the panel and connected to the first side plate, and the dimension of the side plate is the same as the dimension of the first flange along the thickness direction of the panel.

In the technical scheme of this application embodiment, the second curb plate includes panel and sideboard, and the size of sideboard and first turn-ups is the same, under the circumstances that does not increase the maximum size of battery box, improves the size of second accommodation space to improve the space utilization of battery box.

In some embodiments, the second flange has the same dimension as the first flange in the thickness direction of the panel.

In the technical scheme of this application embodiment, along the thickness direction of panel, the size of second turn-ups is the same with the size of first turn-ups to improve the problem that leads to battery box sealing performance to descend owing to set up the paster structure.

In some embodiments, the dimension L2 of the second flange along the thickness direction of the panel is 20 mm.ltoreq.L2.ltoreq.40 mm.

In the technical scheme of this application embodiment, along the thickness direction of panel, the size L2 of second turn-ups satisfies, and 20mm is less than or equal to L2 is less than or equal to 40mm to improve because second turn-ups size is too big, lead to the too big problem of battery box size, and improved because the second turn-ups size is too little, lead to the problem that battery box sealing performance is not enough.

In some embodiments, the first side panel includes two end panels disposed opposite each other along a second direction, and the patch structure is disposed on at least one of the end panels, the first direction and the second direction intersecting.

In the technical scheme of this application embodiment, first side board includes two end plates that set up relatively along the second direction, and the paster structure sets up in at least one end plate to make second accommodation space can be used for holding the functional module of battery, in order to alleviate because the space needs of battery module are preferentially satisfied in the battery box, lead to the problem that each functional module space is nervous, in order to improve the practicality of battery box.

In a second aspect, embodiments of the present application provide a battery, including the battery case of the embodiment of the first aspect.

In a third aspect, an embodiment of the present application provides an electrical device, including a battery according to the embodiment of the second aspect.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic view of a vehicle according to an embodiment of the present application;

fig. 2 is a schematic structural view of a battery module according to an embodiment of the present application;

fig. 3 is a schematic view of a battery module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a battery case according to an embodiment of the present disclosure;

FIG. 5 is an enlarged schematic view of the structure of FIG. 4A;

fig. 6 is a schematic structural diagram of a patch structure of a battery case according to an embodiment of the present disclosure.

Reference numerals in the specific embodiments are as follows:

1. a vehicle; 2. a battery; 101. a motor; 102. a controller; 2021. a first box portion; 2022. a second box portion; 3. a battery cell; 4. a battery module;

5. a battery case;

51. a body; 511. a first base plate; 512. a first side plate; 513. a first flanging; 5121. an end plate;

52. a patch structure; 521. a second side plate; 522. a second flanging; 523. a second base plate; 5231. an extension section; 5232. a connection section; 5211. a panel; 5212. and a side plate.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present application should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or be integrated; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of embodiments of the present application, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the present application, the battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells, or magnesium ion battery cells, and the embodiment of the present application is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separator. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive current collector comprises a positive current collecting part and a positive lug connected to the positive current collecting part, wherein the positive current collecting part is coated with a positive active material layer, and the positive lug is not coated with the positive active material layer. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector comprises a negative electrode current collecting part and a negative electrode tab connected to the negative electrode current collecting part, wherein the negative electrode current collecting part is coated with a negative electrode active material layer, and the negative electrode tab is not coated with the negative electrode active material layer. The material of the anode current collector may be copper, the anode active material layer includes an anode active material, and the anode active material may be carbon or silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene), etc.

The inventors of the present application noted that part of the internal space of the battery case was strained.

The inventor disassembles the battery, and analyzes and researches the structure and the service environment of the battery. The inventors found that with the increase in battery capacity and battery integration, the internal space of the battery case is increasingly strained, which results in the internal space of the battery case still needing to be increased.

Based on the above-mentioned problem found by the inventor, the inventor has improved battery box, the battery box includes the body and paster structure, the body includes first bottom plate, first curb plate and first turn-ups, first bottom plate and first curb plate enclose into the first accommodation space that can be used for holding battery module, first turn-ups are connected in the first curb plate back of the body and are kept away from first accommodation space and extend, the both ends interval setting of first curb plate and enclose into the notch, the paster structure includes second curb plate and second turn-ups, the second curb plate is located the notch and is connected in first bottom plate and first curb plate, the second turn-ups are connected in the first curb plate back of the body and are kept away from the one end of first bottom plate to towards first accommodation space extension, second turn-ups and first turn-ups cooperate in order to keep battery box's sealing performance, and second curb plate and second turn-ups enclose into second accommodation space, second accommodation space and first accommodation space intercommunication, in order to improve battery box's inner space, improve battery box's practicality.

The technical scheme described in the embodiment of the application is applicable to batteries and power utilization devices using the batteries.

The electric device may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, or the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the application does not limit the electric device in particular.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described batteries and electric devices, but may be applied to all batteries including a case and electric devices using the batteries, but for simplicity of description, the following embodiments are described by taking an electric vehicle as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1 according to some embodiments of the present application. The vehicle 1 can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extending vehicle. The interior of the vehicle 1 is provided with a battery 2, which may be provided at the bottom or at the head or at the tail of the vehicle 1. The battery 2 may be used for power supply of the vehicle 1, for example, the battery 2 may serve as an operating power source of the vehicle 1. The vehicle 1 may also include a controller 102 and a motor 101, the controller 102 being configured to control a battery to power the motor 101, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1.

In some embodiments of the present application, the battery may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, providing driving power for the vehicle 1 instead of or in part instead of fuel oil or natural gas.

To meet different demands for power use, the battery 2 may include a plurality of battery cells, which means the smallest units constituting a battery module or a battery pack. Multiple cells may be connected in series and/or parallel via electrode terminals for use in various applications. The battery 2 mentioned in the present application includes a battery module or a battery pack. The battery cells can be connected in series or parallel or in series-parallel connection, and the series-parallel connection refers to the mixture of series connection and parallel connection. In the embodiment of the application, a plurality of battery monomers can directly form a battery pack, or can form a battery module first, and the battery module forms the battery pack again.

Fig. 2 shows a schematic structural diagram of a battery 2 according to an embodiment of the present application.

As shown in fig. 2, the battery includes a battery case 5 and a battery cell (not shown) housed in the battery case 5.

The battery case 5 may have a simple three-dimensional structure such as a rectangular parallelepiped, a cylinder, or a sphere, or may have a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped, a cylinder, or a sphere. The battery case 5 may be made of an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

The battery case 5 is used for accommodating the battery cells, and the battery case 5 may have various structures. In some embodiments, the battery case 5 may include a first case portion 2021 and a second case portion 2022, where the first case portion 2021 and the second case portion 2022 are mutually covered, and the first case portion 2021 and the second case portion 2022 together define an accommodating space for accommodating the battery cell 3. The second case portion 2022 may be a hollow structure having one end opened, the first case portion 2021 is a plate-like structure, and the first case portion 2021 is covered on the opening side of the second case portion 2022 to form a battery case 5 having an accommodation space; the first case portion 2021 and the second case portion 2022 may each be a hollow structure having one side open, and the open side of the first case portion 2021 is closed to the open side of the second case portion 2022 to form the battery case 5 having an accommodation space. Of course, the first housing portion 2021 and the second housing portion 2022 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In order to improve the sealing property after the first housing portion 2021 and the second housing portion 2022 are connected, a sealing member, such as a sealant, a seal ring, or the like, may be provided between the first housing portion 2021 and the second housing portion 2022.

Assuming that the first housing portion 2021 is covered on top of the second housing portion 2022, the first housing portion 2021 may also be referred to as an upper cover, and the second housing portion 2022 may also be referred to as a lower cover.

In the battery 2, the number of battery cells may be one or more. If the number of the battery cells is multiple, the multiple battery cells can be connected in series or in parallel or in series-parallel connection, and the series-parallel connection means that the multiple battery cells are connected in series or in parallel. The plurality of battery monomers can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery monomers is accommodated in the battery box 5; of course, a plurality of battery units may be connected in series or parallel or in series to form the battery module 4, and then the plurality of battery modules 4 may be connected in series or parallel or in series to form a whole and be accommodated in the battery case 5.

Fig. 3 shows a schematic structural view of the battery module 4 according to an embodiment of the present application.

In some embodiments, as shown in fig. 2 and 3, the battery cells 3 are plural, and the plural battery cells 3 are first connected in series or parallel or in series-parallel to form the battery module 4. The plurality of battery modules 4 are connected in series, in parallel or in series-parallel to form a whole, and are accommodated in the battery case 5.

The plurality of battery cells 3 in the battery module 4 may be electrically connected through a bus bar member to realize parallel connection or series-parallel connection of the plurality of battery cells 3 in the battery module 4.

In the present application, the battery cell 3 may include a lithium ion battery cell 3, a sodium ion battery cell 3, a magnesium ion battery cell 3, or the like, which is not limited in the embodiment of the present application. The battery cell 3 may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc., which is not limited in the embodiment of the present application. The battery cells 3 are generally divided into three types in a package manner: the cylindrical battery cell 3, the prismatic battery cell 3, and the pouch battery cell 3 are not limited thereto in this embodiment. However, for simplicity of description, the following embodiments will take the square battery cell 3 as an example.

Referring to fig. 4 and 5, fig. 4 is a schematic structural diagram of a battery case according to an embodiment of the present disclosure; fig. 5 is an enlarged schematic view of the structure at a in fig. 4.

In a first aspect, as shown in fig. 4 and 5, the present application provides a battery case 5, where the battery case 5 includes a body 51 and a patch structure 52, the body 51 includes a first bottom plate 511, a first side plate 512 and a first flange 513, the first side plate 512 is connected to the first bottom plate 511 and encloses a first accommodating space (not shown) with an opening at one end in a first direction X, the first flange 513 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends facing away from the first accommodating space, and the first side plate 512 is provided with enclosed notches (not shown) around two ends of the first accommodating space at intervals; the patch structure 52 includes a second side plate 521 and a second flange 522, where the second side plate 521 is located at the notch and connected to the first bottom plate 511 and the first side plate 512, and the second flange 522 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends toward the first accommodating space, and the second side plate 521 and the second flange 522 enclose a second accommodating space, where the second accommodating space is communicated with the first accommodating space.

The body 51 of the battery case 5 may refer to at least one of an upper case or a lower case, and for convenience of description, the body 51 is described below as an example in the embodiment of the present application.

The first side plate 512 extends around the accommodating space, or the first side plate 512 extends around the edge of the first bottom plate 511, the head end and the tail end of the first side plate 512 are arranged at intervals, and the notch is formed by encircling the head end and the tail end of the first side plate 512.

The first flange 513 is integrally connected to the first side plate 512 and extends away from the accommodating space, the first flange 513 is a sealing flange for improving the sealing performance of the battery box 5, and the first flange 513 and the first side plate 512 are integrally arranged for improving the sealing reliability of the first flange 513 and the first side plate 512.

Alternatively, the first side plate 512 includes side beams oppositely disposed in the width direction of the bottom plate, and end plates 5121 oppositely disposed in the length direction of the bottom plate, and the notch may be disposed at any one of the side beams or the end plates 5121.

Alternatively, the patch structure 52 is hermetically connected to the body 51, and illustratively, the second side plate 521 of the patch structure 52 is welded to both the first side plate 512 and the first bottom plate 511.

The body 51 is formed by stamping, and a stamping fillet and/or a drawing angle exists between the first bottom plate 511 and the first side plate 512, so that the available space inside the battery box 5 is smaller than the envelope size of the battery box 5, the patch structure 52 and the body 51 are arranged in a split manner, the second side plate 521 of the patch structure 52 is welded with the first bottom plate 511, and the stamping fillet and/or the drawing angle does not need to be arranged between the second side plate 521 and the first bottom plate 511, so that the utilization rate of the space inside the battery box 5 is improved.

Optionally, the first flange 513 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends away from the first accommodating space, the second flange 522 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends toward the first accommodating space, and the first flange 513 and the second flange 522 are staggered in the extending direction of the first flange 513, so as to solve the problem that the sealing performance of the battery box 5 is reduced due to a gap between the first flange 513 and the second flange 522.

Alternatively, the slot shape matches the shape of the patch structure 52, and the slot is illustratively rectangular.

In the technical scheme of this application embodiment, battery box 5 includes body 51 and paster structure 52, body 51 includes first bottom plate 511, first curb plate 512 and first turn-ups 513, first bottom plate 511 and first curb plate 512 enclose into the first accommodation space that can be used for holding battery module (not shown) in the drawings, first turn-ups 513 connect in the one end that first curb plate 512 deviates from first bottom plate 511 and deviate from first accommodation space and extend, the both ends interval of first curb plate 512 sets up and encloses into the notch, paster structure 52 includes second curb plate 521 and second turn-ups 522, second curb plate 521 is located the notch and connects in first bottom plate 511 and first curb plate 512, second turn-ups 522 are connected in the one end that first curb plate 512 deviates from first bottom plate 511 to extend towards first accommodation space, second turn-ups 522 and first turn-ups 513 cooperate in order to keep battery box 5's sealing performance, and second curb plate 521 and second turn-ups 522 enclose into second accommodation space, second accommodation space and first accommodation space intercommunication, in order to improve battery box 5's inner space, improve battery box 5's practicality.

In some embodiments, as shown in fig. 4 and 5, the patch structure 52 further includes a second bottom plate 523, the second bottom plate 523 is disposed on a side of the second side plate 521 facing away from the second flange 522 in the first direction X, and the second bottom plate 523 is connected between the first bottom plate 511 and the second side plate 521, so that the second side plate 521 is connected to the first bottom plate 511 through the second bottom plate 523.

Optionally, the extension dimension of the second bottom plate 523 in the thickness direction of the second side plate 521 is equal to or greater than the extension dimension of the second flange 522.

Optionally, the second bottom plate 523 and the second side plate 521 are integrally manufactured, and the patch structure 52 is manufactured in a stamping and forming manner, so as to improve the overall sealability of the patch structure 52.

In these embodiments, the patch structure 52 further includes a second bottom plate 523, and the second bottom plate 523 is connected between the first bottom plate 511 and the second side plate 521, so that the second side plate 521 is connected to the first bottom plate 511 through the second bottom plate 523, so as to increase the volume of the second accommodating space, increase the internal space of the battery case 5, and increase the practicality of the battery case 5.

In some embodiments, as shown in fig. 4 and 5, the second bottom plate 523 includes an extension section 5231 and a connection section 5232 arranged in a thickness direction of the second side plate 521, the extension section 5231 is disposed between the connection section 5232 and the second side plate 521, and the connection section 5232 is stacked on one side of the first bottom plate 511 in the first direction X and connected to the first bottom plate 511.

The dashed lines between the extension 5231 and the attachment 5232 in fig. 5 are merely for convenience in distinguishing the extension 5231 from the attachment 5232, to enhance the readability of the drawing, and do not represent an actual product configuration.

Optionally, the extension 5231 is welded to one side of the first bottom plate 511 in the first direction X to improve sealing reliability of the first bottom plate 511 and the extension 5231.

Alternatively, the extension 5231 includes two sub-extensions spaced apart along the first direction X, which are respectively connected to both sides of the first base plate 511 in the thickness direction thereof to improve connection reliability of the first base plate 511 and the second base plate 523.

Optionally, the extension 5231 is connected to a side of the first bottom plate 511 away from the first accommodating space, so as to improve the problem that the extension 5231 occupies the first accommodating space, and improve the utilization rate of the internal space of the battery box 5.

In these embodiments, the second chassis 523 includes the extension section 5231 and the connection section 5232, and the connection section 5232 is stacked on one side of the first chassis 511 in the first direction X and connected to the first chassis 511 to improve connection reliability of the patch structure 52 and the body 51.

In some embodiments, as shown in fig. 4 and 5, the dimension L1 of the connecting section 5232 is 5mm or more in the thickness direction of the second side plate 521.

In these embodiments, the dimension L1 of the connection section 5232 is 5mm or more to improve the problem of insufficient connection reliability of the patch structure 52 and the body 51 due to undersize of the connection section 5232.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a patch structure of a battery case according to an embodiment of the present disclosure.

In some embodiments, as shown in fig. 4 to 6, the second side plate 521 includes a panel 5211 and side plates 5212, and the two side plates 5212 are respectively disposed at two sides of the panel 5211 and connected to the first side plate 512, and the size of the side plate 5212 is the same as the size of the first flange 513 in the thickness direction of the panel 5211.

The maximum dimension of the battery case 5 is the maximum dimension of the battery case 5 in the length, width and height directions thereof, and when the side plate 5212 is the same size as the first flange 513, the volume of the second receiving space can be increased without increasing the maximum dimension of the battery case 5.

Optionally, the face plate 5211 and the side plate 5212 are integrally formed to improve the sealing performance of the second side plate 521.

Alternatively, two side plates 5212 are provided on both sides of the panel 5211, the side plates 5212 are connected between the first side plate 512 and the panel 5211, and the two side plates 5212 are identical in structure and size.

In these embodiments, the second side plate 521 includes a panel 5211 and a side plate 5212, and the side plate 5212 has the same size as the first flange 513, and increases the size of the second receiving space to increase the space utilization of the battery case 5 without increasing the maximum size of the battery case 5.

In some embodiments, as shown in fig. 4 and 6, the second flange 522 is the same size as the first flange 513 in the thickness direction of the panel 5211.

Optionally, the first flange 513 is in sealing connection with the second flange 522, and illustratively, the first flange 513 is welded with the second flange 522, or a sealing ring is disposed between the first flange 513 and the second flange 522, so as to improve the sealing performance of the battery case 5.

In these embodiments, the dimensions of the second flange 522 and the dimensions of the first flange 513 are the same in the thickness direction of the panel 5211 to improve the problem of the reduced sealing performance of the battery case 5 due to the provision of the patch structure 52.

In some embodiments, as shown in FIGS. 4 and 6, the dimension L2 of the second flange 522 is 20mm L2 40mm along the thickness of the panel 5211.

In these embodiments, the dimension L2 of the second flange 522 is satisfied, 20 mm+.l2+.40mm, in the thickness direction of the panel 5211 to improve the problem of oversized battery case 5 due to oversized second flange 522 and to improve the problem of insufficient sealing performance of the battery case 5 due to undersized second flange 522.

In some embodiments, as shown in fig. 4, the first side plate 512 includes two end plates 5121 disposed opposite to each other along the second direction Y, and the patch structure 52 is disposed on at least one of the end plates 5121, and the first direction X and the second direction Y intersect.

The inner space of the battery case 5 should be preferentially satisfied with the installation space of the battery module, which often requires sacrificing the installation space of the functional module, resulting in shortage of the functional module space. The functional module may be a battery management system module or a high voltage module, for example.

Optionally, patch structures 52 are provided on both end plates 5121 of the battery case 5.

In these embodiments, the first side plate 512 includes two end plates 5121 disposed opposite to each other along the second direction Y, and the patch structure 52 is disposed on at least one of the end plates 5121, so that the second accommodating space can be used to accommodate the functional modules of the battery, so as to alleviate the problem of space shortage of each functional module due to preferential satisfaction of the space requirement of the battery module in the battery case 5, so as to improve the practicality of the battery case 5.

In a second aspect, embodiments of the present application provide a battery, including the battery case of the embodiment of the first aspect.

In a third aspect, an embodiment of the present application provides an electrical device, including a battery according to the embodiment of the second aspect.

In some embodiments, as shown in fig. 1 to 6, the battery case 5 includes a body 51 and a patch structure 52, the body 51 includes a first bottom plate 511, a first side plate 512 and a first flange 513, the first side plate 512 is connected to the first bottom plate 511 and encloses a first accommodating space with one end open in a first direction X, the first flange 513 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends away from the first accommodating space, the first side plate 512 surrounds two ends of the first accommodating space at intervals to form a notch, the first side plate 512 includes two end plates 5121 disposed opposite to each other along a second direction Y, and the notch is disposed on at least one end plate 5121;

the patch structure 52 includes a second side plate 521, a second bottom plate 523 and a second flange 522, the second side plate 521 is located at the notch and connected to the first side plate 512, the second bottom plate 523 is disposed at a side of the second side plate 521 facing away from the second flange 522 in the first direction X, the second bottom plate 523 is connected between the first bottom plate 511 and the second side plate 521, the second bottom plate 523 includes an extension section 5231 and a connection section 5232 arranged along a thickness direction of the second side plate 521, the extension section 5231 is disposed between the connection section 5232 and the second side plate 521, the connection section 5232 is stacked at a side of the first bottom plate 511 in the first direction X and connected to the first bottom plate 511, a dimension of the connection section 5232 is 5mm or more along the thickness direction of the second side plate 521,

the second side plate 521 includes a panel 5211 and side plates 5212, the two side plates 5212 are separately disposed on two sides of the panel 5211 and connected to the first side plate 512, the side plates 5212 and the first flange 513 have the same size along the thickness direction of the panel 5211, the second flange 522 and the first flange 513 have the same size, the second flange 522 has a size L2 of 20mm less than or equal to L2 less than or equal to 40mm along the thickness direction of the panel 5211, the second flange 522 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends toward the first accommodating space, the second side plate 521 and the second flange 522 enclose a second accommodating space, and the second accommodating space is communicated with the first accommodating space.

In these embodiments, the battery case 5 includes the body 51 and the patch structure 52, the body 51 includes the first bottom plate 511, the first side plate 512 and the first flange 513, the first bottom plate 511 and the first side plate 512 enclose into a first accommodating space that can be used for accommodating the battery module, the first flange 513 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends away from the first accommodating space, two ends of the first side plate 512 are spaced apart and enclose into a notch, the patch structure 52 includes the second side plate 521 and the second flange 522, the second side plate 521 is located in the notch and connected to the first bottom plate 511 and the first side plate 512, the second flange 522 is connected to one end of the first side plate 512 facing away from the first bottom plate 511 and extends towards the first accommodating space, the second flange 522 and the first flange 513 cooperate to maintain the sealing performance of the battery case 5, and the second side plate 521 and the second flange 522 enclose into a second accommodating space, which is communicated with the first accommodating space to improve the internal space of the battery case 5 and the practicality of the battery case 5.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A battery box, comprising:

the body comprises a first bottom plate, a first side plate and a first flanging, wherein the first side plate is connected with the first bottom plate and surrounds a first accommodating space with one end open in a first direction, the first flanging is connected with one end of the first side plate, which is away from the first bottom plate, and extends away from the first accommodating space, and the first side plate surrounds two ends of the first accommodating space at intervals and surrounds a notch;

the patch structure comprises a second side plate and a second flanging, wherein the second side plate is positioned at the notch and connected with the first bottom plate and the first side plate, the second flanging is connected with the first side plate at one end deviating from the first bottom plate and facing the first accommodating space, the second side plate and the second flanging are enclosed into a second accommodating space, and the second accommodating space is communicated with the first accommodating space.

2. The battery box of claim 1, wherein the patch structure further comprises a second bottom plate disposed on a side of the second side plate facing away from the second flange in the first direction, the second bottom plate being connected between the first bottom plate and the second side plate such that the second side plate is connected to the first bottom plate through the second bottom plate.

3. The battery case according to claim 2, wherein the second bottom plate includes an extension section and a connection section arranged in a thickness direction of the second side plate, the extension section being disposed between the connection section and the second side plate, the connection section being stacked on one side of the first bottom plate in the first direction and connected to the first bottom plate.

4. A battery box according to claim 3, wherein the dimension L1 of the connecting section is 5mm or more in the thickness direction of the second side plate.

5. The battery box according to claim 2, wherein the second side plate includes a panel and side plates, the two side plates are disposed on both sides of the panel and connected to the first side plate, and the dimension of the side plate is the same as the dimension of the first flange along the thickness direction of the panel.

6. The battery case according to claim 5, wherein the second flange has the same size as the first flange in the thickness direction of the panel.

7. The battery case according to claim 5, wherein a dimension L2 of the second flange in a thickness direction of the panel satisfies 20mm ∈l2 ∈40mm.

8. The battery compartment of claim 1, wherein the first side panel includes two end panels disposed opposite each other in a second direction, the patch structure being disposed on at least one of the end panels, the first direction intersecting the second direction.

9. A battery comprising a battery compartment according to any one of claims 1-8.

10. An electrical device comprising a battery as claimed in claim 9.