CN115882143A - Battery box, battery package and consumer - Google Patents

Abstract

The application provides a battery box, battery package and consumer relates to casing technical field. The battery box includes: a housing frame having a first accommodating chamber and a second accommodating chamber, the first accommodating chamber being configured to be spaced apart from the second accommodating chamber; the bottom plate assembly is arranged at the lower end of the shell frame and comprises a first bottom plate structure and a second bottom plate structure, the first bottom plate structure is located at a first accommodating cavity to form a first space for accommodating an electric device in a surrounding mode with the shell frame, the second bottom plate structure is located at a second accommodating cavity to form a second space for accommodating a battery monomer in a surrounding mode with the shell frame, and the lower end of the first bottom plate structure is flush with the lower end of the second bottom plate structure. Can make first bottom plate structure and second bottom plate structure parallel and level, can guarantee that it forms the battery package and when assembling in the automobile body, no minimum has reduced the thickness of whole package, has improved the utilization ratio of whole package volume.

Description

Battery box, battery package and consumer

Technical Field

The application relates to the technical field of shells, particularly, relate to a battery box, battery package and consumer.

Background

The electromotion is one of the main trends of automobile development in China, and the market share of new energy automobiles mainly comprising lithium batteries is gradually increased. The power battery pack is used as an important bearing part of the new energy automobile, plays an important role in power supply stability and safety protection of the battery cell module, and needs to meet the bearing performance requirements of different working conditions such as extrusion and torsion. Meanwhile, in order to further reduce the quality of the whole vehicle, the quality of the battery case frame also needs to meet the requirement of light weight.

In the related art, when electrical devices such as a BDU and a BMS are disposed in a battery frame, the electrical devices may have a need for replacement and maintenance, and therefore, a window design is made corresponding to the electrical devices, and when the electrical devices need to be maintained, a cover plate at the window position can be opened for maintenance; however, the cover plate is designed to be locked by bolts, so the cover plate generally protrudes out of the whole battery pack, which causes uneven height of the whole battery pack, increased thickness of the whole battery pack and reduced volume utilization rate of the whole battery pack.

Disclosure of Invention

An object of this application is to provide a battery box, battery package and consumer, can make the bottom surface parallel and level of battery box, no minimum has reduced the thickness of whole package, has improved the utilization ratio of whole package volume.

In order to achieve the purpose, the following technical scheme is adopted in the application:

in a first aspect, the present application provides a battery case comprising: a housing frame having a first accommodating chamber and a second accommodating chamber, the first accommodating chamber being configured to be disposed apart from the second accommodating chamber; a bottom plate assembly disposed at the lower end of the housing frame, the bottom plate assembly including a first bottom plate structure and a second bottom plate structure, the first bottom plate structure being located at the first accommodating cavity to form a first space for accommodating the electric device with the housing frame, the second bottom plate structure being located at the second accommodating cavity to form a second space for accommodating the battery cell with the housing frame, and the lower end of the first bottom plate structure being flush with the lower end of the second bottom plate structure.

In the process of above-mentioned realization, the casing frame is provided with first chamber and the second chamber that holds, the first bottom plate structure of bottom plate subassembly is connected in first chamber department that holds, in order to enclose with the casing frame and close the first space that forms and be used for holding the electrical part, its second bottom plate structure is connected in second chamber department that holds, in order to enclose with the casing frame and close the second space that forms and be used for holding the battery monomer, and when bottom plate subassembly and casing frame are connected, can make first bottom plate structure and second bottom plate structure parallel and level, can guarantee that it forms the battery package and assemble when the automobile body, no minimum, the thickness of whole package has been reduced, the utilization ratio of whole package volume has been improved.

In some embodiments, the housing frame includes a first frame body having the first accommodation cavity and a second frame body having the second accommodation cavity, the first frame body is connected with the second frame body, and a lower end surface height of the first frame body is not lower than a surface height of at least a partial structure of a lower end of the second frame body.

In the process of the realization, the first frame body is connected with the second frame body, and the lower end height of the first frame body is not lower than that of the second frame body, so that the lower end of the first frame body is connected with the first bottom plate structure, when the lower end of the second frame body is connected with the second bottom plate structure, the lower end of the first bottom plate structure and the lower end of the second bottom plate structure are parallel and level, the air tightness can be ensured, no lowest point is realized, the thickness of the whole package is reduced, and the utilization rate of the volume of the whole package is improved.

In some embodiments, a plurality of extending portions are disposed at intervals at the lower end of the first frame body, the extending portions are protruded along the vertical direction, and the first bottom plate structure is connected to the extending portions.

At the in-process of above-mentioned realization, the lower extreme of first frame main part sets up the extension, and first bottom plate structure can be connected with this extension, realizes the sealed of electrical part, when needs maintain the electrical part, only need with first bottom plate structure from the extension pull down can, improved the maintenance efficiency to the electrical part.

In some embodiments, a height of a lower end surface of the extension is not higher than a height of a lower end surface of the second frame body. The lower end of the extension part is not higher than the lower end of the second frame main body in height, so that the lower end of the extension part and the lower end of the second frame main body can form a ladder shape, when the first bottom plate structure is connected with the extension part, and the second bottom plate structure is connected with the second frame main body, the lower end of the first bottom plate structure and the lower end of the second bottom plate structure can be kept parallel and level, and the battery pack is guaranteed to be highly flat.

In some embodiments, the first frame body includes a first edge beam structure having a connection port facing the second frame body and a first inner beam structure connected at the connection port, and the first floor structure is connected with the first edge beam structure and the first inner beam structure, respectively.

At the in-process of above-mentioned realization, first inner beam structure is located the junction department of first edge beam structure orientation second frame main part for the casing frame forms first chamber and the second of holding and holds the chamber, makes things convenient for the free installation of electrical part and battery, is favorable to the management and control to the battery package, also can improve the security performance of product simultaneously.

In some embodiments, the second frame body includes a second edge beam structure and a second inner beam structure, the second edge beam structure is connected to the first edge beam structure, the second inner beam structure is connected to the inner cavity of the second edge beam structure, and the second bottom plate structure is connected to the first inner beam structure, the second inner beam structure, and the second edge beam structure, respectively.

In the process of the realization, the second boundary beam structure is connected with the first boundary beam structure, and the second inner beam structure is connected with the inner cavity of the second boundary beam structure, so that a first accommodating cavity and a second accommodating cavity can be formed, and when the first frame body and the second frame body form a whole, due to the arrangement of the second inner beam structure, the arrangement of a user for convenience for the battery monomer is facilitated, and the management and control of the battery pack are facilitated.

In some embodiments, the second side beam structure includes two first side beam members and two second side beam members, the two first side beam members are spaced apart from each other in the front-rear direction, and the second side beam member is connected to a side of the first side beam member away from the first side beam structure.

In some embodiments, the first side beam member is provided with a recessed surface, the recessed surface is positioned on a side of the first side beam member away from the second side beam member, the recessed surface has a lower end height level with a lower end surface height of the first side beam structure, and the recessed surface is connected with the first side beam structure.

In the process of the realization, the first side beam piece is arranged on the concave surface, the lower end height of the concave surface is parallel and level with the lower end surface height of the first side beam structure, the concave surface and the first side beam structure can be connected by a user conveniently, the height difference is avoided, and the air tightness risk can not exist after the concave surface is connected with the first side beam structure.

In some embodiments, a lower end surface of the second frame body is provided with a support portion extending in an up-down direction for support of the case frame. The support part is arranged at the lower end of the second frame body, the shell frame can be supported, and when the shell frame is assembled and placed on the ground, the bottom plate assembly of the battery pack can be prevented by contacting the ground through the support part.

In a second aspect, the present application also provides a battery pack including the battery case as described in any one of the above.

Because the battery pack provided in the embodiment of the second aspect of the present application includes the battery case described in the technical solution of the first aspect, all technical effects of the above embodiments are achieved, and are not described herein again.

In a third aspect, the present application further provides an electric device, including the battery pack as described above.

Because the electric device provided in the third aspect of the present application includes the battery pack in the technical solution of the second aspect, all technical effects of the above embodiments are achieved, and are not described herein again.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for a user of ordinary skill in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a battery case disclosed in an embodiment of the present application.

Fig. 2 is a schematic view of a back side of a battery case disclosed in an embodiment of the present application.

Fig. 3 is a side view of a battery case disclosed in an embodiment of the present application.

Fig. 4 is a schematic view of a partial structure of a battery box disclosed in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a first side beam member of a battery box disclosed in an embodiment of the present application.

Reference numerals

100. A battery case; 101. a housing frame; 1011. a first frame body; 10111. a first side beam structure; 10112. a first inner beam structure; 1012. a second frame body; 10121. a first side beam member; 10122. a second side rail member; 10123. an inner stringer; 10124. an inner cross beam; 10125. a recessed surface; 1013. an extension portion; 1014. a support portion; 102. a base plate assembly; 1021. a first backplane structure; 1022. a first lower base plate; 1023. a second lower base plate.

Detailed Description

In order to make the objects, 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 and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a user of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present invention is conventionally placed in use, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, detachable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case to a user of ordinary skill in the art.

Examples

With the development of the CTP technology (battery technology without module), structural adhesives and heat-conducting structural adhesives are increasingly applied to power battery packs, and an extreme integration mode is to bond a battery cell or a module with a liquid cooling plate and a cover plate of a shell through adhesion; however, since the electrical devices, such as the BDU (Battery energy Distribution Unit) and the BMS (Battery Management System), may have a need for replacement and maintenance, a windowing design is made at a corresponding position, and when the electrical devices need to be maintained, the cover plate at the windowing position can be opened for maintenance; however, the cover plate is designed to be locked by bolts, so that the cover plate generally protrudes out of the whole battery pack, the height of the whole battery pack is uneven, the thickness of the whole battery pack is increased, and the volume utilization rate of the whole battery pack is reduced.

In view of this, as shown in fig. 1 to 3, in a first aspect, the present application provides a battery case 100, including: the battery case comprises a case frame 101 and a bottom plate assembly 102, wherein the case frame 101 can be used for accommodating an electric device (such as a BDU, a BMS, and the like) and a battery cell, the bottom plate assembly 102 is connected to the lower end of the case frame 101 to form a cover for the electric device and the battery cell, and when the bottom plate assembly 102 is connected to the case frame 101, one side of the bottom plate assembly 102 away from the case frame 101 is flat, so that the battery case 100 can be kept highly flush when being assembled.

Specifically, the housing frame 101 has a first accommodating chamber and a second accommodating chamber, and the first accommodating chamber is arranged to be spaced from the second accommodating chamber; a bottom plate assembly 102 disposed at a lower end of the housing frame 101, wherein the bottom plate assembly 102 includes a first bottom plate structure 1021 and a second bottom plate structure, the first bottom plate structure 1021 is located at the first accommodating cavity to form a first space for accommodating an electric device with the housing frame 101, the second bottom plate structure is located at the second accommodating cavity to form a second space for accommodating a battery cell with the housing frame 101, and a lower end of the first bottom plate structure 1021 is flush with a lower end of the second bottom plate structure.

For example, the distribution form of the second accommodating cavities may be set according to practical application, for example, the second accommodating cavities may be composed of two square sub-accommodating cavities, or four square sub-accommodating cavities, and the second space formed by connecting the second bottom plate structure and the housing frame 101 may be used for assembling the battery cells, or may be used for assembling a battery module formed by the battery cells.

It should be noted that, when the second space has at least two subspaces, the second bottom plate structure includes a first bottom plate 1022 and a second bottom plate 1023, the first bottom plate 1022 corresponds to one of the subspaces, the second bottom plate 1023 corresponds to the other one of the subspaces, and the first bottom plate 1022 and the second bottom plate 1023 may be configured to be the same or different, and of course, in order to save cost and installation process, the first bottom plate 1022 and the second bottom plate 1023 may be configured to be a common member, that is, the first bottom plate 1022 and the second bottom plate 1023 have the same structure.

In the present application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, a magnesium ion battery cell, or the like, which is not limited in the embodiments of the present application.

The battery cell includes an electrode assembly and an electrolyte, the electrode assembly including a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece comprises a positive current collector and a positive active substance layer, and the positive active substance layer is coated on the surface of the positive current collector; the positive current collector comprises a positive current collecting part and a positive electrode lug protruding out of the positive current collecting part, the positive current collecting part is coated with a positive active substance layer, and at least part of the positive electrode lug is not coated with the positive active substance 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 pole piece comprises a negative pole current collector and a negative pole active substance layer, and the negative pole active substance layer is coated on the surface of the negative pole current collector; the negative current collector comprises a negative current collecting part and a negative electrode lug protruding out of the negative current collecting part, the negative current collecting part is coated with a negative electrode active substance layer, and at least part of the negative electrode lug is not coated with the negative electrode active substance layer. The material of the negative electrode current collector may be copper, the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material may be carbon, silicon, or the like. The material of the spacer may be PP (polypropylene) or PE (polyethylene).

In the process of realizing the above, the shell frame 101 is provided with a first accommodating cavity and a second accommodating cavity, the first bottom plate structure 1021 of the bottom plate assembly 102 is connected to the first accommodating cavity, so as to form a first space for accommodating electric devices by enclosing with the shell frame 101, the second bottom plate structure is connected to the second accommodating cavity, so as to form a second space for accommodating battery cells by enclosing with the shell frame 101, and when the bottom plate assembly 102 is connected with the shell frame 101, the first bottom plate structure 1021 and the second bottom plate structure are parallel and level, so that no lowest point exists when the battery pack is formed and assembled on a vehicle body, the thickness of the whole pack is reduced, and the utilization rate of the volume of the whole pack is improved.

Referring to fig. 1 again, the housing frame 101 includes a first frame body 1011 and a second frame body 1012, the first frame body 1011 has the first receiving cavity, the second frame body 1012 has the second receiving cavity, the first frame body 1011 is connected to the second frame body 1012, and the height of the lower end surface of the first frame body 1011 is not lower than the height of the surface of at least a part of the lower end of the second frame body 1012; that is, the first frame body 1011 and the second frame body 1012 may be fixed by welding (for example, friction stir welding) or the like, the height of the lower end surface of the first frame body 1011 may be higher than the height of the surface of a part of the structure of the lower end of the second frame body 1012, or may be equal to the height of the surface of the lower end of the second frame body 1012 that is not used, for example, the height of the second frame body 1012 is kept consistent with the height of the first frame body 1011 at the connecting position of the second frame body 1012 and the first frame body 1011, or the like, and other cases are not excluded as long as it is satisfied that the lower end surfaces of the first bottom plate structure 1021 and the second bottom plate structure are flush when both are mounted on the housing frame 101, and no particular limitation is made herein.

In the implementation process, the first frame body 1011 is connected with the second frame body 1012, and the height of the lower end of the first frame body 1011 is not lower than that of the lower end of the second frame body 1012, so that the lower end of the first frame body 1011 is connected with the first bottom plate structure 1021, and when the lower end of the second frame body 1012 is connected with the second bottom plate structure, the lower end of the first bottom plate structure 1021 and the lower end of the second bottom plate structure are flush, air tightness can be ensured, no lowest point exists, the thickness of the whole package is reduced, and the utilization rate of the volume of the whole package is improved.

As shown in fig. 2-3, a plurality of extension parts 1013 are disposed at intervals at the lower end of the first frame body 1011, the extension parts 1013 are protruded in the vertical direction, and the first bottom plate structure 1021 is connected to the extension parts 1013. For example, a rivet nut is disposed at a lower end of the first frame body 1011, the rivet nut extends in a direction away from the first frame body 1011 (i.e., in the up-down direction), the first bottom plate 1021 is adapted to the rivet nut by a fixing member such as a bolt, so as to be fixed to the first frame body 1011, and after the first frame body 1011 and the second frame body 1012 are connected, lower ends of the first bottom plate and the second bottom plate can form a step shape, so that when the rivet nut is disposed on the first frame body 1011, a lower end surface of the rivet nut is flush with a lower end surface of the second frame body 1012, for example, a lower end surface of the first frame body 1011 is 2mm higher than a lower end surface of the second frame body 1012, and a height of the rivet nut is 2mm, so as to ensure that the lower end surface of the housing frame 101 is flush when the rivet nut is connected to the first frame body 1011.

In the process of the above implementation, the extension part 1013 is arranged at the lower end of the first frame body 1011, the first bottom plate structure 1021 can be connected with the extension part 1013, sealing of the electric device is achieved, when the electric device needs to be maintained, only the first bottom plate structure 1021 needs to be detached from the extension part 1013, and maintenance efficiency of the electric device is improved.

In some embodiments, the height of the lower end surface of the extension part 1013 is not higher than the height of the lower end surface of the second frame main body 1012, that is, the height of the connection position of the second frame main body 1012 and the first frame main body 1011 is higher than the height of the extension part 1013, and the rest height of the second frame main body 1012 is equal to the height of the lower end of the extension part 1013. By setting the height of the lower end of the extension part 1013 to be not higher than the height of the lower end of the second frame body 1012, the lower end of the extension part 1013 and the lower end of the second frame body 1012 can be formed in a stepped shape, and when the first bottom plate structure 1021 and the extension part 1013 are connected and the second bottom plate structure and the second frame body 1012 are connected, the lower end of the first bottom plate structure 1021 and the lower end of the second bottom plate structure can be maintained in a flush state, thereby ensuring the height of the battery pack to be flat.

Referring to fig. 1 again, the first frame body 1011 includes a first side beam structure 10111 and a first inner beam structure 10112, the first side beam structure 10111 has a connection port facing the second frame body 1012, the first inner beam structure 10112 is connected to the connection port, and the first bottom plate structure 1021 is connected to the first side beam structure 10111 and the first inner beam structure 10112, specifically, the extension parts 1013 are disposed on the periphery of the lower end of the first side beam structure 10111 and the lower end of the first inner beam structure 10112.

In the process of above-mentioned realization, first inner beam structure 10112 is located first limit beam structure 10111 towards the connector department of second frame main part 1012 for casing frame 101 forms first chamber and the second chamber that holds, makes things convenient for the free installation of electrical part and battery, is favorable to the management and control to the battery package, also can improve the security performance of product simultaneously.

In some embodiments, the second frame main body 1012 includes a second boundary beam structure and a second inner beam structure, the second boundary beam structure is connected to the first boundary beam structure 10111, the second inner beam structure is connected to the inner cavity of the second boundary beam structure, and the second bottom plate structure is respectively connected to the first inner beam structure 10112, the second inner beam structure, and the second boundary beam structure, wherein the second inner beam structure includes an inner longitudinal beam 10123 and an inner cross beam 10124, the inner longitudinal beam 10123 is disposed between the first inner beam structure 10112 and the inner cross beam 10124, the inner cross beam 10124 is located at a second boundary beam member 10122 of the second boundary beam structure, which is connected to the first boundary beam structure 10111 through the second boundary beam structure, and the second inner beam structure is connected to the inner cavity of the second boundary beam structure, and a first receiving cavity and a second receiving cavity can be formed, so that the first frame main body 1011 and the second frame main body 1012 form an integral structure, and the second inner beam structure is convenient for the battery pack, thereby facilitating the battery pack management and control.

In some embodiments, the second side beam structure includes two first side beam members 10121 and two second side beam members 10122, the two first side beam members 10121 are spaced apart from each other along a front-rear direction, the second side beam member 10122 is connected to a side of the first side beam member 10121 away from the first side beam structure 10111, that is, the lengths of the first side beam members 10121 are configured to be distributed along a left-right direction, and the lengths of the second side beam members 10122 are configured to be distributed along the front-rear direction and are respectively connected to the two first side beam members 10121.

As shown in fig. 4 to 5, the first side beam member 10121 is provided with a recessed surface 10125, the recessed surface 10125 is located on a side of the first side beam member 10121 away from the second side beam member 10122, a lower end height of the recessed surface 10125 is flush with a lower end surface height of the first side beam structure 10111, and the recessed surface 10125 is connected to the first side beam structure 10111.

In the process of the above implementation, the first side beam member 10121 is disposed on the recessed surface 10125, and the lower end height of the recessed surface 10125 is flush with the lower end surface height of the first side beam structure 10111, so that a user can conveniently connect the recessed surface 10125 with the first side beam structure 10111, and the height difference is avoided, so that the air tightness risk cannot exist after the recessed surface 10125 is connected with the first side beam structure 10111.

Referring to fig. 4 or 5, the lower end surface of the first side beam 10121 of the second frame body 1012 is provided with a support part 1014, the support part 1014 includes, but is not limited to, a support strip, the length of the support part 1014 is configured to be distributed in the left-right direction, and the support part 1014 extends in the up-down direction for supporting the housing frame 101. The support 1014 is provided at the lower end of the second frame body 1012 to support the case frame 101, and when the case frame 101 is assembled and placed on the ground, the support 1014 contacts the ground to prevent the bottom plate assembly 102 of the battery pack.

In a second aspect, the present application also provides a battery pack including the battery case 100 as described in any one of the above. The battery box 100 may be used to accommodate a plurality of battery cells, or a plurality of battery modules formed by assembling a plurality of battery cells.

Because the battery pack provided in the second aspect of the present application includes the battery case 100 described in the technical solution of the first aspect, all technical effects of the above embodiments are achieved, and are not described herein again.

In a third aspect, the present application further provides an electric device, which includes the battery pack as described above. The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool and the like. The vehicle can be a fuel oil vehicle, a 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 and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above power utilization device. Taking the vehicle as an example, the vehicle may further include a controller and a motor, the controller being configured to control the power battery to supply power to the motor, for example, for use in starting, navigating, and operating power requirements of the vehicle during driving.

Because the electric device provided in the third aspect of the present application includes the battery pack in the technical solution of the second aspect, all technical effects of the above embodiments are achieved, and are not described herein again.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (11)

1. A battery case, comprising:

a housing frame having a first accommodating chamber and a second accommodating chamber, the first accommodating chamber being configured to be disposed apart from the second accommodating chamber;

a bottom plate assembly disposed at the lower end of the housing frame, the bottom plate assembly including a first bottom plate structure and a second bottom plate structure, the first bottom plate structure being located at the first accommodating cavity to form a first space for accommodating the electric device with the housing frame, the second bottom plate structure being located at the second accommodating cavity to form a second space for accommodating the battery cell with the housing frame, and the lower end of the first bottom plate structure being flush with the lower end of the second bottom plate structure.

2. The battery box according to claim 1, wherein the case frame includes a first frame body having the first receiving chamber and a second frame body having the second receiving chamber, the first frame body is connected to the second frame body, and a lower end surface height of the first frame body is not lower than a surface height of at least a partial structure of a lower end of the second frame body.

3. The battery box body as claimed in claim 2, wherein a plurality of extension parts are provided at intervals at the lower end of the first frame main body, the extension parts are protruded in the vertical direction, and the first bottom plate structure is connected with the extension parts.

4. The battery case according to claim 3, wherein a height of a lower end surface of the extension portion is not higher than a height of a lower end surface of the second frame body.

5. The battery box of claim 2, wherein the first frame body comprises a first side beam structure and a first inner beam structure, the first side beam structure has a connection port facing the second frame body, the first inner beam structure is connected to the connection port, and the first bottom plate structure is connected to the first side beam structure and the first inner beam structure, respectively.

6. The battery box body of claim 5, wherein the second frame body comprises a second edge beam structure and a second inner beam structure, the second edge beam structure is connected with the first edge beam structure, the second inner beam structure is connected with an inner cavity of the second edge beam structure, and the second bottom plate structure is respectively connected with the first inner beam structure, the second inner beam structure and the second edge beam structure.

7. The battery box body as claimed in claim 6, wherein the second side beam structure includes two first side beam members and two second side beam members, the two first side beam members are spaced apart from each other in the front-rear direction, and the second side beam member is connected to the first side beam member on a side away from the first side beam structure.

8. The battery box body as claimed in claim 7, wherein the first side beam member is provided with a recessed surface on a side of the first side beam member away from the second side beam member, a lower end height of the recessed surface is flush with a lower end surface height of the first side beam structure, and the recessed surface is connected with the first side beam structure.

9. The battery case according to claim 2, wherein a lower end surface of the second frame body is provided with a support portion extending in an up-down direction for support of the case frame.

10. A battery pack comprising the battery case according to any one of claims 1 to 9.

11. An electric device comprising the battery pack according to claim 10.

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