CN116581455A

CN116581455A - Battery box, assembly and car

Info

Publication number: CN116581455A
Application number: CN202310461098.XA
Authority: CN
Inventors: 李新平; 李淑齐
Original assignee: IAT Automobile Technology Co Ltd
Current assignee: IAT Automobile Technology Co Ltd
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2023-08-11

Abstract

The application relates to the field of automobile manufacturing, in particular to a battery box body, an assembly and an automobile; the battery box includes: the outer wall of the outer shell is fixedly connected with the vehicle body, at least one end of the outer shell is provided with an opening, and a cavity for bearing a battery is formed in the outer shell; the opening is provided with a semi-closed or fully-closed box door, the box door is connected with a movable structure, and the movable structure enables the box door to be connected with the outer shell in a rotating mode or in a detachable mode. The battery box body can complete battery replacement in a short time, is convenient and quick, and is favorable for rapidly advancing a battery pack quick-change technology so as to adapt to diversified quick-change battery types; the quick-change battery of different types can be flexibly adapted to batteries of different sizes, and the quick-change battery can be elastically matched according to the power consumption requirement of the passenger car, so that the modularized design of the battery can be realized, the battery can be shared among various vehicle types, and the cost of the battery can be greatly reduced.

Description

Battery box, assembly and car

Technical Field

The application relates to the field of automobile manufacturing, in particular to a battery box body, an assembly and an automobile.

Background

The most traditional battery pack adopts the traditional CMTP technology, and the integration of battery core, module, battery pack and vehicle body is required to be completed in sequence. The whole vehicle needs to load electric quantity as much as possible in a limited chassis space, so that the volume utilization rate is improved, and the standardized feasibility of each integration step needs to be considered. Along with the continuous increase of the volume of single battery module, the appearance of battery package integration technology has been driven.

The battery pack box body is directly fixedly mounted with a vehicle body, and is one of the more common battery fixing schemes of the electric vehicle at present. In short, the battery pack case is to place the battery chip in a sealed metal container and seal the battery chip to prevent battery short-circuiting and safety accidents. In the fixing scheme, the battery pack box body is directly used as a structural strength component part of the whole battery system, is arranged at fixed point positions such as the lower part or the rear part of the vehicle body, and is directly fixed with the vehicle body.

The main advantages of this solution are space utilization and structural stability. The battery chip can be effectively protected from external impact, and the structural strength and stability of the battery system can be improved to the greatest extent because the battery chip is directly connected with the vehicle body.

However, this solution also has some drawbacks: for example, the power battery pack of the new energy automobile is directly fixedly connected with the automobile body, so that the disassembly and the assembly are very difficult, namely the frequent battery quick-change technology cannot be supported.

Disclosure of Invention

The application provides a battery box, an assembly and an automobile, and aims to solve the problem that a frequent battery quick-change technology cannot be supported in a scheme that a battery pack box is directly fixedly mounted with an automobile body in the prior art; through intensive research by the inventor of the present application, the general inventive concept provides a battery pack case having high versatility.

In order to support the above general inventive concept, a first aspect of the present application provides a battery case, characterized in that the battery case includes: the outer wall of the outer shell is fixedly connected with the vehicle body, at least one end of the outer shell is provided with an opening, and a cavity for bearing a battery is formed in the outer shell; the opening is provided with a semi-closed or fully-closed box door, the box door is connected with a movable structure, and the movable structure enables the box door to be connected with the outer shell in a rotating mode or in a detachable mode.

In an alternative aspect of the present application, the movable structure includes: one end of the hinge structure is connected with the box door, and the other end of the hinge structure is connected with the outer shell body and is used for providing the rotation freedom degree of the box door; the locking structure is characterized in that one end of the locking structure is connected with the box door, and the other end of the locking structure is connected with the outer shell and is used for providing locking force of the box door; wherein the hinge structure is disposed on the opposite or side of the latch structure.

In a further aspect of the present application, the latch structure includes: one end of the first base is fixedly connected to the outer surface of the box door, and the other end of the first base is rotatably connected with the connecting arm; the connecting arm is provided with an elastomer which is used for providing the first base with elastic force for driving the box door to be closed; and one end of the second base is connected with the connecting arm, and the other end of the second base is fixedly connected to the outer wall of the outer shell.

In a further scheme of the application, one end of the outer shell is an opening, and comprises a box upper plate, a box lower plate, a side plate and a box rear plate, wherein the box upper plate and the box lower plate are provided with bulges or grooves, so that a gap area is reserved between a battery and the box upper plate as well as between the battery and the box lower plate, and the shape of the box door corresponds to that of the opening; the hinge structure is arranged at the edge of the bulge or the groove, and the locking structure is arranged on the side plate of the outer shell.

In a further scheme of the application, the box door comprises a window, and a battery limiting block is arranged on the inner wall of the box door and extrudes the battery to limit the free space of the battery.

In a further scheme of the application, two sides of the lower plate of the box body, which are opposite to the bulges or the grooves, are provided with guiding and limiting slide rails, and the guiding and limiting slide rails are mutually matched with the bottoms of the batteries.

In a further aspect of the present application, the guiding and limiting slide rail extends to the outside of the housing, and a portion of the guiding and limiting slide rail exposed out of the housing is disposed obliquely downward with respect to the housing.

In a further aspect of the application, the outer housing is integrally formed.

In a further aspect of the application, a socket connector is disposed on the battery rear panel, the socket connector is used for electrically connecting with the vehicle body and communicating with a network, and the socket connector and a corresponding end of the battery form a plug-in fit.

In a further scheme of the application, the upper plate and the lower plate of the box body are provided with fixing structures which are embedded on the bulges or the grooves and are used for fixedly connecting with the car body.

In a second aspect of the present application, there is provided a battery assembly comprising a plurality of the above battery cases, the battery cases being arranged in sequence; the battery is arranged in the battery box body;

finally, the application also provides an automobile, which comprises the battery assembly.

The application provides a battery box body capable of quickly replacing batteries based on the battery and vehicle body integration technology, which can realize the following effects by turning and opening or detachable connection through the rotation connection of a box door:

1. the battery box body can complete battery replacement in a short time, is convenient and quick, and is favorable for rapidly pushing a battery pack quick-change technology to adapt to diversified quick-change battery types.

2. The quick-change battery of different types can be flexibly adapted to batteries of different sizes, and the quick-change battery can be elastically matched according to the power consumption requirement of the passenger car, so that the modularized design of the battery can be realized, the battery can be shared among various vehicle types, and the cost of the battery can be greatly reduced.

Other advantages and features of the present application are further described in the detailed description that follows.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery case according to an embodiment of the present application;

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

fig. 3 is a schematic structural view of an outer case in a battery case according to an embodiment of the present application;

fig. 4 is a schematic structural view of an outer case of the battery case according to the embodiment of the present application when a battery is loaded;

fig. 5 is a schematic structural diagram of a door in a battery box according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a hinge structure in a battery case according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a latch structure in a battery case according to an embodiment of the present application.

In the above figures, the list of components represented by the various numbers is as follows:

100. a battery case;

11. an outer housing;

111. a box upper plate; 112. A lower plate of the box body;

113. a side plate; 114. A rear cover of the case;

115. guiding and limiting sliding rail;

12. a fixed structure;

13. a door;

131. a battery limiting block; 132. a window;

14. a movable structure;

141. a hinge structure; 142. A latch structure;

1421. a first base; 1422. A second base;

1423. a connecting arm; 1424. An elastomer;

15. a receptacle connector;

16. and a buffer structure.

Detailed Description

In the description of the present application, it should be understood that, if there are descriptions of terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientation or positional relationship, it should be understood that the orientation or positional relationship shown based on the drawings is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application.

Furthermore, the presence of features defining "first" and "second" for descriptive purposes only, should not be interpreted as indicating or implying a relative importance or implicitly indicating the number of features indicated. Features defining "first", "second" may include at least one such defined feature, either explicitly or implicitly. If a description of "a plurality" is present, the generic meaning includes at least two, e.g., two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; the connection may be mechanical connection, electrical connection, direct connection, indirect connection through an intermediate medium, communication between two elements or interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., as used herein, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The application will be described in detail below with reference to the drawings in connection with exemplary embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery case according to an embodiment of the present application; i.e., to take over the aforementioned general inventive concept.

The battery box 100 includes an outer case 11, a fixed structure 12, a box door 13, and a movable structure 14;

the outer wall of the outer shell 11 is fixedly connected with the vehicle body, and the shape of the outer shell is selected in an adapting way according to the shape of the battery inside, and the outer shell is a rectangular body in the application.

The position of the vehicle body can be a vehicle body cross beam or a battery cover, and the vehicle body can be integrated according to the required design.

Further, an opening (a surface exposed with reference to fig. 1) is provided at least one end of the outer case 11 in the opposite longitudinal direction, and the inside of the outer case 11 includes a cavity for carrying a battery.

The outer shell 11 can be made of aluminum alloy, magnesium alloy, carbon fiber and the like by adopting injection molding, die casting, extrusion molding and other processes, so that the weight of the whole vehicle can be reduced, and the energy efficiency and the driving mileage can be improved.

Further, the outer casing 11 is provided with a semi-closed or fully-closed door 13 at the opening, the door and the outer casing 11 form a matching relationship through a movable structure 14, and the movable structure 14 enables the door 13 and the outer casing 11 to be connected in a rotating or detachable manner.

It can be understood that the battery placed in the inner cavity of the outer casing 11 can be taken out from the opening independently when the door 13 is opened or detached, so that the battery replacement can be completed in a short time, and the convenience and the rapidness are realized. Compared with the prior art, the battery maintenance can be completed only by a long time, and the economy and the efficiency of maintenance are improved. The battery box body 100 can be further in modular design through quick-change, and the battery formed by the battery box body 100 can be shared among various vehicle types, so that the cost of the battery is reduced. On the basis of the above battery case 100, the feasibility and reliability of the electric vehicle can be improved. The electric automobile adopting the battery box body can be greatly convenient for users to use, and the reliability of the electric automobile is improved, so that the electric automobile is more suitable for daily use.

The movable structure 14 for connecting the box door 13 and the outer shell 11 can be detachably connected or rotatably connected;

when the movable structure 14 adopts a detachable structure, some alternatives are provided below:

1. the movable structure 14 can be a threaded connection structure, the box door 13 is tightly connected with the outer shell 11 through threads, and the disassembly is realized through screwing the threads;

2. the latch type connection structure is characterized in that one or more groups of latches are arranged on the end part of the outer shell 11, and holes or grooves are formed in different positions of the box door 13 to receive the latches. The bolt can be spring type or lock catch type, so that the firmness of the connection between the outer shell 11 and the box door 13 can be ensured;

3. the hook type connecting structure is characterized in that one or more hook type structures are arranged at two ends of the box door 13 and the outer shell 11, so that two parts can be mutually locked, and connection and disassembly are completed;

4. the snap-in connection is achieved by designing a protruding projection (snap-in) in one of the doors 13 and a corresponding recess in the outer housing 11, which is aligned and pushed in.

Further, when the movable structure 14 adopts a rotating structure, some alternatives are provided below:

1. the hinge structure realizes the rotation of the box door 13 through the hinge connection of the box door 13 and the outer shell 11;

2. the clasp or hook structure connects the door 13 and the outer housing 11 directly via a contact surface, for example, bolts to connect the door 13 and the outer wall of the outer housing 11. Unlike the hinge structure, it is also possible to achieve frequent disassembly of the door 13.

The following is a description of specific embodiments with respect to the above general inventive concept:

[ EXAMPLES ]

With continued reference to fig. 1 to 4, fig. 2 is a back view of a schematic structural diagram of a battery case provided in an embodiment of the present application, fig. 3 is a schematic structural diagram of an outer casing 11 in the battery case provided in an embodiment of the present application, and fig. 4 is a schematic structural diagram of the outer casing 11 in the battery case provided in an embodiment of the present application when a battery is loaded;

in a preferred embodiment of the present application, the outer housing 11 is a rectangular housing, and the outer housing 11 is provided with an opening at one end and a cavity for carrying a battery at the other end as shown in fig. 2. Specifically, the outer case 11 includes an upper case plate 111, a lower case plate 112, side plates 113, and a rear case plate 114 to enclose a single-ended open-ended shape.

Wherein, shell 11 adopts integrated into one piece, improves production efficiency and ensures shell 11's structural strength simultaneously.

The upper case plate 111 and the lower case plate 112 are shaped like a Chinese character 'ji', and are provided with protrusions or grooves thereon so that a part of clearance areas are left between the battery and the upper case plate 111 and between the battery and the lower case plate 112; the clearance area can serve as a heat dissipation channel of the battery, so that the safety, service life and performance of the battery inside the battery are effectively improved.

The further fixing structure 12 adopts a fixing bolt which penetrates through the upper case plate 111 and the lower case plate 112 and is embedded on the protrusion or the groove for fixedly connecting the battery case 100 and the vehicle body; the space can be greatly saved, and the space utilization rate is improved.

When the upper case plate 111 and the lower case plate 112 are in a figure, the door 13 corresponds to the opening in shape, i.e., like a cross.

A socket connector 15 is provided on the battery rear plate 114 for electrical connection with the vehicle body and network communication; meanwhile, the socket connector 15 penetrates into the cavity of the outer shell 11, and can be in plug-in fit with one end corresponding to the battery, so that the positive and negative foolproof effects of the battery can be achieved.

It will be appreciated that the receptacle connector 15 may vary accordingly as the model of the battery varies.

Furthermore, the outer housing 11 is provided with guiding and limiting sliding rails 115 on two sides of the lower plate 113 of the housing, which are opposite to the protrusions or grooves, the guiding and limiting sliding rails 115 are mutually matched with the bottom of the battery, so as to limit the movement direction of the battery, thereby avoiding the battery from shifting during insertion and keeping the accuracy and stability of battery installation.

The guiding and limiting sliding rail 115 is designed to extend to the outside of the outer casing 11, and the part of the outer casing 11 exposed is inclined downwards relatively, so that excessive buffering can be formed when the battery is taken out, and the outer casing 11 is not required to be provided with a guide rail, so that space and cost are saved.

Meanwhile, the guiding limit sliding rail 115 can reduce friction force, friction applied to the battery during insertion can be reduced, abrasion of the battery during quick replacement is reduced, and service life of the battery is prolonged.

Those skilled in the art will appreciate that the guide and limit rail 115 may be disposed on the upper panel 111 or the side panel 113 of the case, and such modifications are within the equivalent scope of the embodiments of the present application.

With continued reference to fig. 4 and 5, fig. 5 is a schematic structural view of the door 13 in the battery case 100 according to the embodiment of the present application;

the inner wall of the chamber door 13 is provided with a battery stopper 131, and the battery stopper 131 presses the battery in the chamber to limit the free space of the battery in the length direction.

Further, the surface of the battery stopper 131 has adhesion, which further improves the stability of the battery in the cavity.

Further, a buffer structure 16, such as a rubber gasket, foam, etc., may be provided on the contact surface of the battery and the case upper plate 111, the case lower plate 112 to limit the free space of the battery in the height direction, so as to reduce the impact of the battery when it is subjected to vibration. The stability and vibration resistance of the battery are improved.

Further, a window 132 is provided in the middle area of the door 13, which is used for heat dissipation from the battery, and for connecting terminals and the outside for power or sensing information transmission.

Please continue to refer to fig. 1, 6 and 7; fig. 6 is a schematic structural diagram of a hinge structure 141 in a battery case 100 according to an embodiment of the present application, and fig. 7 is a schematic structural diagram of a latch structure 142 in the battery case 100 according to an embodiment of the present application.

Corresponding to the outer housing 11 provided in this embodiment, the movable structure 14 is configured as a rotatable structure capable of automatically opening and closing, and includes a hinge structure 141 and a latch structure 142.

A hinge structure 141 having one end connected to the door 13 and the other end connected to the outer case 11 for providing a degree of freedom of rotation of the door 13;

one end of the locking structure 142 is connected with the box door 13, and the other end is connected with the outer wall of the outer shell 11, and is used for providing locking force of the box door 13;

specifically, the hinge structure 141 is disposed on the opposite or side of the latch structure 142;

as shown in fig. 1, the hinge structure 141 is provided at the raised edge of the upper case plate 113, and the latch structure 142 is provided on the side plate 113 of the outer case 13. Namely, the box door 13 takes the edge of the protruding part of the upper plate 113 of the box body as a rotating shaft to realize the opening, closing and folding of 0-350 degrees. The latch structure 142 locks the door 13 from the side to secure the battery inside the cavity.

In an alternative embodiment of the present application, the latch structure 142 includes a first base 1421, a second base 1422, and a connecting arm 1423, where one end of the first base 1421 is fixedly connected to the outer surface of the door 13, and the other end is rotatably connected to the connecting arm 1423; the connecting arm 1423 is provided with an elastic body 1424, and the elastic body 1424 is used for providing elastic force for the first base 1421 to drive the door 13 to automatically close; one end of the second base 1422 is connected with the connecting arm 1423, and the other end is fixedly connected to the outer wall of the outer shell 11;

it will be appreciated that by the cooperative operation of the components of the latch mechanism 142, the door 13 is automatically closed by the energy of the compressed elastic body 1424, and the convenience and safety of battery replacement are increased without requiring a complicated disassembly. Meanwhile, safety accidents caused by negligence in battery replacement can be avoided.

[ Battery Assembly ]

The embodiment of the application also provides a battery assembly (not shown), which comprises a plurality of battery boxes 100 and batteries, wherein the battery boxes 100 are sequentially arranged and combined, and the batteries are arranged in the battery boxes 100.

It can be appreciated that the number and the shape of the battery case 100 can be flexibly set and matched according to the specification and the size of the battery, and can be adapted to various quick-change batteries. The combination mode among the batteries can be freely selected, and can be series connection, parallel connection, series-parallel connection, reverse parallel connection and the like. The battery assembly using the battery case 100 has high versatility.

[ Battery Assembly mounting method and Battery quick Change method ]

The embodiment of the application also provides the battery assembly, a battery mounting method and a battery quick-change method, wherein the battery assembly mounting method comprises the following steps:

s11, transferring the outer shell to a preset station and fixing;

s12, processing fixed structures of an upper box plate and a lower box plate;

s13, processing a socket connector on a rear plate of the box body;

s14, installing a battery limiting block on the inner wall of the box door;

s15, installing a lock catch structure on a box door;

s16, installing a hinge structure between the box door and the upper plate of the box body;

s17, opening the lock catch structure and the box door, and installing the quick-change battery;

and S18, closing the lock catch structure to finish the installation process.

Further, the quick-change method of the battery comprises the following steps:

s21, controlling the end effector to open the locking structure, opening the box door and taking out the battery;

step S22, automatically placing a new battery into the cavity, and detecting whether the new battery is installed in place;

and S23, closing the lock catch structure to finish replacement after receiving feedback information of the in-place installation.

It should be understood by those skilled in the art that if the battery box 100 provided in the embodiment of the present application is assembled and replaced by fusing, simply changing, mutually changing, etc., all or part of the sub-modules involved in the battery box, such as placing and moving the components; or the products formed by the two are integrally arranged; or a removable design; it is within the scope of the present application to replace the corresponding components of the present application with devices/apparatuses/systems that may be combined to form a device/apparatus/system having a specific function.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. 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.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. A battery box, characterized in that the battery box comprises:

the outer wall of the outer shell is fixedly connected with the vehicle body, at least one end of the outer shell is provided with an opening, and a cavity for bearing a battery is formed in the outer shell;

the opening is provided with a semi-closed or fully-closed box door, the box door is connected with a movable structure, and the movable structure enables the box door to be connected with the outer shell in a rotating mode or in a detachable mode.

2. The battery box of claim 1, wherein the movable structure comprises:

one end of the hinge structure is connected with the box door, and the other end of the hinge structure is connected with the outer shell and is used for providing the rotation freedom degree of the box door;

the locking structure is characterized by comprising a locking structure, wherein one end of the locking structure is connected with the box door, and the other end of the locking structure is connected with the outer shell and is used for providing locking force for the box door;

wherein the hinge structure is arranged at the opposite side or the side of the locking structure.

3. The battery compartment of claim 2, wherein the latch structure comprises:

one end of the first base is fixedly connected to the outer surface of the box door, and the other end of the first base is rotatably connected with the connecting arm;

the connecting arm is provided with an elastic body which is used for providing elastic force for the first base to drive the box door to be closed;

and one end of the second base is connected with the connecting arm, and the other end of the second base is fixedly connected to the outer wall of the outer shell.

4. The battery box body according to claim 2, wherein one end of the outer shell body is an opening, the outer shell body comprises an upper box body plate, a lower box body plate, side plates and a rear box body plate, the upper box body plate and the lower box body plate are provided with protrusions or grooves, so that a clearance area is reserved between the battery and the upper box body plate and between the battery and the lower box body plate, and the shape of the box door corresponds to that of the opening;

the hinge structure is arranged at the edge of the protrusion or the groove, and the locking structure is arranged on the side plate of the outer shell.

5. The battery box of claim 2, wherein the box door includes a window, and a battery stopper is provided on an inner wall of the box door, and presses the battery to limit a free space of the battery.

6. The battery box according to claim 4, wherein two sides of the lower box plate, which are opposite to the protrusions or grooves, are provided with guiding and limiting sliding rails, and the guiding and limiting sliding rails are mutually matched with the bottoms of the batteries.

7. The battery box of claim 6, wherein the guide limit rail extends to the outside of the housing, and a portion of the guide limit rail exposing the housing is disposed obliquely downward with respect to the housing.

8. The battery case according to claim 4, wherein the outer case is integrally formed.

9. The battery box of claim 4, wherein the battery back plate is provided with a socket connector, the socket connector is used for electrically connecting with the vehicle body and communicating with a network, and meanwhile, the socket connector and one corresponding end of the battery form a plug-in fit.

10. The battery box according to claim 4, wherein the upper and lower box plates are provided with fixing structures embedded in the protrusions or grooves for fixedly connecting with the vehicle body.

11. A battery assembly, the battery assembly comprising:

a plurality of battery cases according to any one of claims 1 to 10, the battery cases being arranged in sequence;

and the battery is arranged in the battery box body.

12. An automobile comprising the battery assembly of claim 11.