CN220569843U - Battery box and energy storage device - Google Patents

Abstract

The present application relates to the field of batteries, and in particular, to a battery case and an energy storage device. The battery box body is used for placing the battery module and comprises a box main body and a frame, wherein the box main body is made of insulating materials, the inner side of the bottom surface of the box main body is protruded to form a protruded structure, and an accommodating groove is formed in the outer side of the bottom surface of the box main body corresponding to the protruded structure; the frame is detachably connected to the protruding structure and located in the accommodating groove, and the frame is used for being fixedly connected with the battery module. The case main part of battery box adopts insulating material, can improve the electric insulation of case main part, thereby the inboard protruding structure of bottom surface of case main part can support the battery module on the one hand and restrict the removal of battery module, on the other hand can enclose the frame of its bottom, keeps apart frame and external object in order to form the electric potential isolation, improves the insulativity of frame, can improve the holistic electric insulation of battery box from this.

Description

Battery box and energy storage device

Technical Field

The present disclosure relates to battery technology, and particularly to a battery case and an energy storage device.

Background

A battery monomer is arranged in the box body of the energy storage device, and in order to prevent the battery monomer from moving in the box body, a limiting piece is usually arranged on the bottom plate of the box body to limit the movement of the battery monomer. At present, the insulation of the battery box body and the limiting piece is poor, and the overall electrical safety of the energy storage device is low.

Disclosure of Invention

Accordingly, it is necessary to provide a battery case and an energy storage device, which solve the problems of poor insulation between the battery case and a stopper and low overall electrical safety of the energy storage device.

In a first aspect, the present application provides a battery box for place battery module, the battery box includes:

the box body is made of insulating materials, the inner side of the bottom surface of the box body is protruded to form a protruded structure, and the outer side of the bottom surface of the box body is provided with a containing groove corresponding to the protruded structure; and

and the frame is detachably connected with the protruding structure and positioned in the accommodating groove, and is used for being fixedly connected with the battery module.

In one embodiment, the battery box further comprises a first fastener and a second fastener, the first fastener is arranged on the bottom surface of the frame, the protruding structure is provided with a first mounting hole, and the first mounting hole is connected with the first fastener through the second fastener.

In one embodiment, a depth of the projection structure in a height direction of the box main body is greater than or equal to a sum of a thickness of the frame and a thickness of the first fastener.

In one embodiment, the box body is a square body, the bottom surface of the box body comprises a broadside and a long side which are adjacently connected, the battery modules are sequentially arranged in the box body along the broadside, the protruding structure comprises a lateral structure and a vertical structure which are connected, the lateral structure is close to the broadside, the vertical structure is parallel to the long side, a separation space formed by the lateral structure and the vertical structure is used for placing the battery modules, and the outline size of the separation space is larger than or equal to that of the battery modules.

In one embodiment, the broadsides are two opposite sides, the number of the transverse structures is two, the number of the vertical structures is one, the two transverse structures are respectively close to the two broadsides and are oppositely arranged, and the vertical structures are arranged between the two transverse structures.

In one embodiment, the frame comprises connected cross beams and vertical beams, wherein the cross beams are detachably connected to the transverse structure and are positioned in the accommodating grooves of the transverse structure, and the vertical beams are positioned in the accommodating grooves of the vertical structure.

In one embodiment, the insulating material is a plastic or phase change material and/or the frame is a sheet metal frame.

In a second aspect, an embodiment of the present application provides an energy storage device, where the energy storage device includes a battery box and a battery module according to the first aspect, and the battery module is disposed in the battery box.

In one embodiment, the battery module comprises end plates arranged at intervals along the length direction of the battery module and a plurality of battery cells arranged between the end plates, and the end plates are arranged on the protruding structures;

the battery box body further comprises a first fastening piece and a second fastening piece, the first fastening piece is arranged on the bottom surface of the frame, the protruding structure is provided with a first mounting hole, and the first mounting hole is connected with the first fastening piece through the second fastening piece.

In one embodiment, the end plate is provided with a second mounting hole penetrating in the height direction of the end plate, and the second fastener sequentially penetrates through the second mounting hole and the first mounting hole to be connected with the first fastener.

The box main part of battery box adopts insulating material, can improve the electric insulation of box main part, thereby the protruding structure of the bottom surface inboard of box main part can support the battery monomer on the one hand and restrict the battery monomer and remove, on the other hand can be as the safety cover can enclose the frame of its bottom to form the electric potential isolation between messenger's frame and the surrounding object, improve the insulativity of frame, thereby can improve the holistic electric insulation of battery box.

Drawings

Fig. 1 is a schematic diagram of a household energy storage system according to an embodiment of the present application.

Fig. 2 is a schematic perspective view of a battery case according to an embodiment of the present application.

Fig. 3 is a schematic perspective view of a box body according to an embodiment of the present application.

Fig. 4 is a schematic perspective view of a frame according to an embodiment of the present application.

Fig. 5 is an assembly schematic view of a battery module and a frame in an embodiment of the present application.

Fig. 6 is a schematic view of an assembly of an end plate and a second fastener in an embodiment of the present application.

Reference numerals illustrate:

100. an energy storage device;

200. an electric energy conversion device;

300. user load;

10. a battery case; 20. a battery module; 201. a battery cell;

1. a box main body; 11. a bump structure; 111. a first mounting hole; 112. a transverse structure; 113. a vertical structure; 114. a partition space; 12. a receiving groove; 13. a broadside; 14. a long side;

2. a frame; 21. a cross beam; 22. a vertical beam;

3. a first fastener;

4. a second fastener;

5. an end plate; 51. a second mounting hole;

6. an electrode terminal;

7. a power battery management system;

8. a fan;

9. hollow structure.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting itself.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; 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 terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through 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.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Because of the strong timeliness and space properties of energy sources required by people, in order to reasonably utilize the energy sources and improve the utilization rate of the energy, one energy form needs to be stored by one medium or equipment and then is converted into another energy form, and then is released in a specific energy form based on future application requirements. As is well known, to achieve the great goal of carbon neutralization, green energy is currently mainly used to replace fossil energy so as to achieve the purpose of generating green electric energy.

The existing green energy mainly comprises light energy, wind energy, water potential and the like, and the problems of strong intermittence and large fluctuation of the light energy, the wind energy and the like generally exist, so that the voltage of a green power grid is unstable (insufficient electricity is used in a peak and too much electricity is used in a valley), and the unstable voltage can cause damage to the electric power, so that the problem of 'wind abandoning and light abandoning' is possibly caused by insufficient electricity demand or insufficient power grid receiving capability.

To solve the problem of insufficient power demand or insufficient power grid acceptance, an energy storage device must be relied on. The energy storage device converts the electric energy into other forms of energy through physical or chemical means to store the energy, the energy stored by the energy storage device is converted into the electric energy to be released when needed, in short, the energy storage device is similar to a large-scale 'charge pal', when the light energy and the wind energy are sufficient, the electric energy is stored, and the stored electric energy is released when needed.

The existing energy storage (i.e. energy storage) application scene is wider, including aspects such as power generation side energy storage, electric network side energy storage, renewable energy grid-connected energy storage, user side energy storage and the like, the types of corresponding energy storage devices include:

(1) The large energy storage container applied to the energy storage scene at the power grid side can be used as a high-quality active and reactive power regulation power supply in the power grid, so that the load matching of electric energy in time and space is realized, the renewable energy consumption capability is enhanced, and the large energy storage container has great significance in the aspects of standby of a power grid system, relieving peak load power supply pressure and peak regulation and frequency modulation;

(2) The main operation modes of the small and medium-sized energy storage electric cabinet applied to the industrial and commercial energy storage scenes (banks, shops and the like) at the user side and the household small-sized energy storage box applied to the household energy storage scene at the user side are peak clipping and valley filling. Because of the large price difference of the electricity charge at the peak-valley position according to the electricity consumption requirement, after the energy storage equipment is arranged by a user, in order to reduce the cost, the energy storage cabinet/box is charged usually in the electricity price valley period; and in the peak period of electricity price, the electricity in the energy storage equipment is released for use, so that the purpose of saving electricity charge is achieved. In addition, in remote areas and areas with high occurrence of natural disasters such as earthquake, hurricane and the like, the household energy storage device is equivalent to the fact that a user provides a standby power supply for the user and the power grid, and inconvenience caused by frequent power failure due to disasters or other reasons is avoided.

Taking a household energy storage scenario in a user side energy storage as an example, fig. 1 shows a household energy storage system, where the household energy storage system includes an energy storage device 100 and an electric energy conversion device 200 (such as a photovoltaic panel), and a user load 300 (such as a street lamp, a household appliance, etc.), and the energy storage device 100 is a small energy storage box, and may be installed on an outdoor wall by a wall hanging manner. Specifically, the power conversion device 200 may convert solar energy into electric energy during the low electricity price period, and store the electric energy by the energy storage device 100, and then supply the electric energy to the consumer load 300 for use during the peak electricity price period, or supply the electric energy to the consumer load 300 for use during the power outage/power failure period of the power grid.

In combination with the above-mentioned case of performing energy storage by physical or electrochemical means, taking electrochemical energy storage as an example, the energy storage device 100 includes at least one group of chemical batteries, and chemical elements in the chemical batteries are used as an energy storage medium, so as to implement a charging and discharging process through chemical reaction or change of the energy storage medium. In short, the electric energy generated by light energy and wind energy is stored in at least one group of chemical batteries through chemical reaction or change of the energy storage medium, and when the use of external electric energy reaches a peak, the electric quantity stored in at least one group of chemical batteries is released for use through the chemical reaction or change of the energy storage medium, or is transferred to a place where the electric quantity is short for use.

The present embodiments provide an energy storage device 100, and the energy storage device 100 may be, but is not limited to, a single battery, a battery module, a battery pack, a battery system, and the like. The unit cell may be a lithium ion secondary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, and the unit cell may be a cylinder, a flat body, a rectangular parallelepiped, or the like, which is not limited in the embodiment of the present application.

Next, the energy storage device 100 is explained in detail using the energy storage device 100 as a battery pack as an example. The battery pack comprises a battery box body 10 and a battery module 20, wherein the battery module 20 comprises a plurality of battery cells 201, and the battery module 20 is arranged in the box body 1.

Referring to fig. 2 and 3, in a first aspect, the present application provides a battery case 10 for setting a battery module 20, the battery case 10 includes a case body 1 and a frame 2, the material of the case body 1 is an insulating material, the inner side of the bottom surface of the case body 1 is protruded to form a protruded structure 11, the outer side of the bottom surface of the case body 1 is provided with a containing groove 12 corresponding to the protruded structure 11, the frame 2 is detachably connected to the protruded structure 11 and located in the containing groove 12, and the frame 2 is fixedly connected with the battery module 20. The insulating material can improve the electrical insulation of case main part 1, and protruding structure 11 can support battery module 20, restricts battery module 20's removal, and insulating protruding structure 11 can enclose its frame 2 of bottom and keep apart frame 2 to realize the insulation of frame 2, can improve battery case 10's whole electrical security from this.

Referring to fig. 5 and 6, at present, the bottom of the battery case 10 is fixed with screws or bolts, the bolts limit the movement of the battery module, and after the screws and bolts are locked for several times, the screws are easily damaged, so that the battery case is scrapped. According to the embodiment of the application, the frame 2 is arranged, so that the screw can be continuously used as a locking structure to be locked with the screw after the screw is damaged. In some embodiments, the battery case 10 further includes a first fastener 3 and a second fastener 4. Referring to fig. 3 and 6, the first fastening member 3 is disposed on the bottom surface of the frame 2, and the protruding structures 11 are spaced apart by first mounting holes 111, and the first mounting holes 111 are connected to the first fastening member 3 through the second fastening member 4. Referring to fig. 3 and 5, when the screw of the case body 1 is damaged, the screw is replaced, the frame 2 is mounted on the bottom surface of the case body 1, the battery module 20 is put in the area defined by the protrusion structure 11 of the case body 1, the second fastening member 4 is inserted into the first mounting hole 111 of the protrusion structure 11 from the top of the case body 1 and is butted with the first fastening member 3 on the frame 2, and the second fastening member 4 and the first fastening member 3 are electrically batch-locked to achieve mounting connection.

Illustratively, the first fastener 3 may be a nut, such as a clinch nut, a blind rivet nut, a tension rivet nut, or the like, or the second fastener 4 may be a screw or bolt with which the nut can be mated, using a bolt, for ease of disassembly and maintenance.

In some embodiments, the depth of the projection structure 11 in the height direction of the box main body 1 is greater than or equal to the sum of the thickness of the frame 2 and the thickness of the first fastener 3. When the depth of the projection structure 11 is equal to the sum of the thickness of the frame 2 and the thickness of the first fastener 3, the end surface of the first fastener 3 facing the ground is aligned with the bottom surface of the tank main body 1. When the depth of the projection structure 11 is greater than the sum of the thickness of the frame 2 and the thickness of the first fastener 3, the end surface of the first fastener 3 facing the ground is spaced from the ground. Thereby, the first fastening member 3 and the frame 2 can be hidden by the projection structure 11, and when the battery case 10 is placed on the ground, the abrasion of the frame 2 and the first fastening member 3 can be reduced.

Referring to fig. 3 and 6, in some embodiments, the battery module 20 includes end plates 5 disposed at intervals along the length thereof and a plurality of battery cells 201 disposed between the end plates 5, and the end plates 5 are disposed on the protrusion structures 11. The protruding structure 11 of end plate 5 and its bottom can play the restriction to battery cell 201 simultaneously, prevents that battery cell 201 from reciprocating, and protruding structure 11 can reduce the setting length of end plate 5.

Referring to fig. 5 and 6, in some embodiments, the end plate 5 is provided with a second mounting hole 51 penetrating therethrough along its height direction, and the second fastener 4 sequentially penetrates through the second mounting hole 51 and the first mounting hole 111 on the protrusion 11 to connect with the first fastener 3 on the bottom surface of the frame 2. The second fastening member 4 can interact with the end plate 5, the end plate 5 can increase the contact area between the second fastening member 4 and the battery module 20, the second fastening member 4 can increase the structural strength of the end plate 5, and meanwhile, the structural stability of the second fastening member 4 and the end plate 5 and the limiting and restraining effects on the battery cells 201 are improved.

In some embodiments, the number of the second fasteners 4 is plural, and the corresponding second mounting holes 51 may be formed in the end plate 5, the first mounting holes 111 may be formed in the protruding structure 11, and the first fasteners 3 may be disposed on the bottom surface of the frame 2. The first mounting holes 111 and the second mounting holes 51 may have different hole pitches according to the size of the battery module 20, and the first fasteners 3 on the corresponding frame 2 may also have different hole pitches, so as to be able to adapt to battery cells 201 and end plates 5 of different sizes.

Referring to fig. 2 and 3, in some embodiments, the case body 1 is a square body, the bottom surface of the case body 1 includes a wide side 13 and a long side 14 that are adjacently connected, the battery modules 20 are sequentially arranged in the case body 1 along the wide side 13, the protruding structure 11 includes a lateral structure 112 and a vertical structure 113 that are connected, the lateral structure 112 is disposed near the wide side 13, the vertical structure 113 is disposed parallel to the long side 14, a separation space 114 formed by the lateral structure 112 and the vertical structure 113 is used for setting the battery modules 20, and the outline dimension of the separation space 114 corresponds to the outline dimension of the battery modules 20. Thus, the lateral structure 112 and the vertical structure 113 can abut against two adjacent sides of the battery module 20, and can limit the movement of the battery module 20 from different directions of front, rear, left and right.

The battery case 10 has two opposite wide sides 13 and two opposite long sides 14. The lateral structure 112 may be one or more and the vertical structure 113 may be one or more. For example, when the number of the lateral structures 112 is two and the number of the vertical structures 113 is one, the two lateral structures 112 may be disposed adjacent to the two wide sides 13, respectively, and the vertical structures 113 are disposed between the two lateral structures 112, so that two separation spaces 114 are formed at both left and right sides of the vertical structures 113, and the two battery modules 20 may be placed in the two separation spaces 114. As yet another example, two lateral structures 112 and two vertical structures 113 are provided, the two vertical structures 113 being opposite and respectively parallel to the two long sides 14, the two vertical structures 113 being simultaneously provided between the opposite two lateral structures 112, so that the interior of the case body 1 is partitioned into three partitioned spaces 114, and three battery modules 20 may be placed in the three partitioned spaces 114. Still another example, two vertical structures 113 and one lateral structure 112 are provided, the two vertical structures 113 are disposed opposite to each other, the lateral structure 112 is disposed between the two vertical structures 113, so that two separation spaces 114 are formed at both front and rear sides of the lateral structure 112, and two battery modules 20 may be placed in the two separation spaces 114. The embodiment is not limited to the specific arrangement of the lateral structure 112 and the vertical structure 113, and may be adjusted according to the size and shape of the battery module 20.

Optionally, the first mounting hole 111 may be provided on the lateral structure 112 and/or on the vertical structure 113. The cross-sectional shapes of the lateral structure 112 and the vertical structure 113 in the height direction thereof may be arch-shaped, square-shaped, trapezoid-shaped, or the like, which is not particularly limited in this embodiment.

In some embodiments, corresponding to the transverse structure 112 and the vertical structure 113, the frame 2 comprises a cross beam 21 and a vertical beam 22 connected, the cross beam 21 being removably connected to the transverse structure 112 and being located in the receiving slot 12 of the transverse structure 112, the vertical beam 22 being located in the receiving slot 12 of the vertical structure 113. The frame 2 can be easily installed, and the connection strength of the frame 2 can be improved.

Alternatively, the first fastener 3 may be provided on the bottom surface of the cross beam 21 and/or the bottom surface of the vertical beam 22. The cross-sectional shapes of the cross members 21 and the vertical members 22 in the height direction thereof may be arched, square, trapezoid, or the like, which is not particularly limited in this embodiment.

Referring to fig. 3 and 4, in some embodiments, the number of the transverse structures 112 is two, the number of the vertical structures 113 is one, the two transverse structures 112 are respectively adjacent to the two broadsides 13 and are oppositely arranged, the vertical structures 113 are arranged between the two transverse structures 112, and the vertical structures 113 divide the transverse structures 112 into two separation spaces 114 for arranging the two battery modules 20. Referring to fig. 6, as described above, the end plate 5 is disposed at the wide edge 13 of the box body 1, and the transverse structure 112 is also disposed near the wide edge 13 of the box body 1, and the two positions are corresponding, so that the end plate 5 can be directly disposed on the transverse structure 112.

Referring to fig. 3, the scheme of the embodiment of the present application is illustrated by taking the first fastener 3 as a clinch nut and the second fastener 4 as a screw as an example: the vertical structure 113 divides each of the lateral structures 112 into a first portion and a second portion, between which one battery module 20 is disposed, and between which another battery module 20 is disposed. Taking the first part of the transverse structure 112 as an example, one of the first parts is provided with two first mounting holes 111 according to the width of the battery module 20, two second mounting holes 51 are correspondingly arranged on the end plate 5 above the first part, two press riveting nuts are correspondingly arranged on the cross beam 21 below the first part, and therefore the first part can be penetrated by two screws which respectively penetrate through two second through holes on the end plate 5, and the two first mounting holes 111 on the first part are locked with the two press riveting nuts on the cross beam 21. The other first portion opposite to the first portion is also provided in the same manner so that one battery module 20 is defined by four screws, further improving the limit function.

At present, the main body 1 of the battery box is mainly made of steel or aluminum, the weight is heavy, the battery box is greatly influenced by external temperature, when the temperature difference of the external environment is greatly changed, moisture in air is accumulated on the main body 1 to form condensed water, the condensed water is easy to cause the occurrence of insulation failure and other conditions, the internal temperature of the battery box is difficult to manage and regulate, the processing procedure is complex, the cost is high, the manufacturing precision is poor, and the thermal deformation control is difficult.

In some embodiments, the insulating material used for the case body 1 may be a plastic material or PCM material (Phase Change Material ), which is a conventional insulating material in the art, and can improve electrical insulation of the battery case. PCM materials refer to substances that change state of a substance and can provide latent heat without changing temperature. The case body 1 made of PCM material can absorb heat at a higher ambient temperature and release heat at a lower ambient temperature, and has a good heat dissipation effect, so that the internal environment of the case body 1 can be improved, and phenomena such as insulation failure caused by moisture condensation can be reduced. The plastic material and the PCM material have light weight and are easy to process, the weight of the battery case 10 can be reduced, and the processing cost can be remarkably reduced.

In some embodiments, the frame 2 may be a sheet metal frame 2, for example, a steel frame 2 or an aluminum frame 2, which is easy to be punched to provide the first fastener 3, etc.

Referring to fig. 2, in some embodiments, the battery case 10 further includes a cover plate and a front plate and a rear plate disposed opposite to each other, and the case body 1 includes a bottom plate and a side plate connected to each other, and the side plate is connected to the front plate and the rear plate. The cover plate, the front plate, the rear plate and the side plates are all made of insulating materials, the inner side of the bottom surface of the bottom plate is protruded to form a protruded structure 11, and the outer side of the bottom surface of the bottom plate is provided with a containing groove 12 corresponding to the protruded structure 11. Wherein, be equipped with hollow out construction 9 on back plate and the curb plate, hollow out construction 9 is used for ventilation. Be equipped with electrode terminal 6 on the front bezel, electrode terminal 6 is connected with battery module 20 electricity, has still offered the air intake on the front bezel, and the air supply cooling of inside battery monomer 201 is carried out to assembly fan 8 in the position that corresponds the air intake, realizes case main part 1 inside circulation cooling heat dissipation and outside aeration cooling, still is equipped with BMS (Battery Management System, power battery management system) 7 of being connected with battery module 20 electricity on the front bezel for detect and the analysis battery state, carry out energy control management and battery safety protection and battery information management.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A battery box for place battery module, its characterized in that, battery box includes:

the box body is made of insulating materials, the inner side of the bottom surface of the box body is protruded to form a protruded structure, and the outer side of the bottom surface of the box body is provided with a containing groove corresponding to the protruded structure; and

and the frame is detachably connected with the protruding structure and positioned in the accommodating groove, and is used for being fixedly connected with the battery module.

2. The battery box of claim 1, further comprising a first fastener and a second fastener, the first fastener disposed on the bottom surface of the frame, the raised structure having a first mounting hole, the first mounting hole being connected to the first fastener by the second fastener.

3. The battery case according to claim 2, wherein a depth of the protruding structure in a height direction of the case main body is greater than or equal to a sum of a thickness of the frame and a thickness of the first fastener.

4. The battery box according to claim 1, wherein the box body is a square body, the bottom surface of the box body comprises a wide side and a long side which are adjacently connected, the protruding structure comprises a transverse structure and a vertical structure which are connected, the transverse structure is arranged close to the wide side, the vertical structure is parallel to the long side, a separation space formed by the transverse structure and the vertical structure is used for placing the battery module, and the outline size of the separation space is larger than or equal to that of the battery module.

5. The battery box of claim 4, wherein the broadsides are opposite sides, the number of the transverse structures is two, the number of the vertical structures is one, the two transverse structures are respectively adjacent to the two broadsides and are opposite, and the vertical structures are arranged between the two transverse structures.

6. The battery box of claim 4, wherein the frame comprises connected cross beams and vertical beams, the cross beams being removably connected to the transverse structure and positioned in the receiving slots of the transverse structure, the vertical beams being positioned in the receiving slots of the vertical structure.

7. The battery box of any of claims 1 to 6, wherein the insulating material is a plastic or phase change material and/or the frame is a sheet metal frame.

8. An energy storage device, characterized in that the energy storage device comprises a battery box body and a battery module according to any one of claims 1 to 7, wherein the battery module is arranged in the battery box body.

9. The energy storage device of claim 8, wherein the battery module comprises end plates arranged at intervals along the length direction of the battery module and a plurality of battery cells arranged between the end plates, wherein the end plates are arranged on the protruding structures;

the battery box body further comprises a first fastening piece and a second fastening piece, the first fastening piece is arranged on the bottom surface of the frame, the protruding structure is provided with a first mounting hole, and the first mounting hole is connected with the first fastening piece through the second fastening piece.

10. The energy storage device of claim 9, wherein the end plate is provided with a second mounting hole therethrough along a height direction thereof, and the second fastener sequentially penetrates the second mounting hole and the first mounting hole to be connected with the first fastener.