WO2023142271A1

WO2023142271A1 - Battery box, battery, and electrical device

Info

Publication number: WO2023142271A1
Application number: PCT/CN2022/086598
Authority: WO
Inventors: 林志全; 贾俊; 林志强
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-01-30
Filing date: 2022-04-13
Publication date: 2023-08-03
Also published as: CN216213898U

Abstract

The present application discloses a battery box, a battery, and an electrical device. The battery box comprises: a first beam and a second beam arranged opposite to each other in a first direction, a mounting hole penetrating through one of the two beams in a second direction intersecting the first direction; a mounting rod penetrating through the mounting hole in the second direction; and a fixing strap surrounding the mounting rod in the first direction, the fixing strap, the first beam, and the second beam coming together to form a fixing space, and the fixing space being used for accommodating a battery module. The battery comprises the battery module and the battery box, the battery module being fixed in the battery box. The electrical device comprises an electricity consumption main body and the battery.

Description

A battery box, battery and electrical device

technical field

The present application relates to the technical field of battery preparation, and more specifically, to a battery box, a battery and an electrical device.

Background technique

With the development of new energy technology, power batteries have become an important direction for the development of new energy. For power batteries, the battery module is one of the important components. Therefore, increasing the energy density of the battery module can help improve the overall space utilization of the power battery.

In the prior art, cable ties are usually used to bind and stabilize the battery module to increase the energy density of the battery module. However, the current fixing method of cable ties will lead to uneven force on the power battery, which will affect the structural stability of the power battery, and is not conducive to improving the performance of the power battery.

Contents of the invention

In view of this, the present application discloses a battery case, a battery and an electrical device.

A battery case, comprising:

The first beam body and the second beam body arranged opposite to each other along the first direction, at least one of them is provided with a mounting hole along a second direction intersecting with the first direction;

The mounting rod is inserted in the mounting hole along the second direction;

a fixing belt, wound around the mounting rod along the first direction, the fixing belt surrounds the first beam body and the second beam body to form a fixed space, and the fixed space is used for accommodating battery module.

In one of the embodiments, the first beam body or the second beam body is provided with the installation hole along the second direction, and the first beam body or the second beam body is opened with its own The installation notch connected to the installation hole, the fixing belt is wound around the exposed mounting rod through the installation notch of the first beam body or the installation notch of the second beam body.

In one embodiment, there are at least two installation notches of the first beam body or at least two installation notches of the second beam body, and each of the installation notches is arranged at intervals along the second direction.

In one of the embodiments, both the first beam body and the second beam body are provided with the installation holes along the second direction, and the first beam body and the second beam body are both provided with their own described mounting holes. The installation notches communicated with the installation holes, and the fixing straps are wound around the exposed mounting rods through each of the installation notches.

In one of the embodiments, the number of the mounting rods is two, and the two mounting rods respectively pass through the mounting hole of the first beam body and the mounting hole of the second beam body. In the hole; each of the fixing straps is wound around the two mounting rods along the first direction, and the two ends are kept fixed to each other.

In one of the embodiments, there are at least two installation notches of the first beam body, and the installation notches of the first beam body are arranged at intervals along the second direction; the second beam body There are at least two installation notches, and the installation notches on the second beam body are arranged at intervals along the second direction.

In one of the embodiments, the installation notches on the first beam body and the second beam body are paired along the first direction, and there are at least two fixing straps, and each fixing strap passes through A set of paired mounting notches are arranged around the exposed mounting rods, and surround the first beam body and the second beam body to form the fixing bracket arranged along the second direction. space.

In one of the embodiments, the battery case further includes fixing pieces for fixing the first and last ends of the fixing belt.

In one of the embodiments, the first beam or the second beam penetrates through the installation hole along the second direction, each of the fixing parts penetrates through a fixing channel along the first direction, and the fixing The belt is wound around the mounting rod of the first beam body or the mounting rod of the second beam body along the first direction, and its head and tail ends pass through the The fixing channels of the fixing parts are fixed to each other.

In one of the embodiments, the first beam body and the second beam body are provided with the mounting holes along the second direction, and each of the fixing parts is provided with a fixing channel along the first direction. The fixing belt is wound around the first beam body and the second beam body behind the hanging rods along the first direction, and the first and last ends of the fixing belt pass through the fixing parts in the direction away from each other. Fix the channels and fix each other.

In one of the embodiments, the battery box further includes a frame body, and the two ends of the first beam body and the second beam body along the second direction are limited in the frame body.

A battery includes a battery module and the above-mentioned battery box, the battery module is fixed in the battery box.

An electrical device, comprising an electrical main body and the above-mentioned battery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present application, and those of ordinary skill in the art can also obtain other drawings according to the disclosed drawings on the premise of not paying creative efforts.

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

Fig. 2 is an exploded view of the battery case shown in Fig. 1;

Fig. 3 is a structural schematic diagram of a first beam body and a second beam body in the battery box shown in Fig. 1;

Fig. 4 is a top view of the battery case shown in Fig. 1;

Fig. 5 is the sectional view of A-A place among Fig. 4;

Fig. 6 is a partial enlarged view of place B in Fig. 5;

Fig. 7 is a partial enlarged view of place C in Fig. 5;

Fig. 8 is a schematic structural view of the fixing member in the battery case shown in Fig. 1;

FIG. 9 is a schematic structural diagram of a battery box in an embodiment of the present application.

Explanation of reference numbers:

100. Battery box; 201. Battery module; 10. First beam body; 20. Second beam body; 30. Mounting rod; 40. Fixing belt; 50. Mounting hole; 60. Fixing space; 70. Installation gap ; 80, fixing piece; 90, frame main body; 51, the first mounting hole; 52, the second mounting hole; 31, the first mounting rod; 32, the second mounting rod; 71, the first mounting gap; 72, The second installation gap; 81, the fixed channel; 91, the frame beam; 92, the rectangular accommodation space; a, the first direction; b, the second direction.

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When 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. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

At present, judging from the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields . With the continuous expansion of power battery application fields, its market demand is also constantly expanding.

As the market demand for power batteries continues to increase, people require power batteries to have higher energy density and smaller volume for daily use. Therefore, in the prior art, cable ties are usually used to bind and fix the battery modules in the power battery. Thus, not only can the arrangement of the battery module in the power battery be made more compact, but also the problem of deformation of the battery module during use can be solved.

It should be noted that the battery module mentioned above may be a battery module composed of battery cells, and in this case the battery module may include end plates and side plates. In addition, the battery module can also be a collection of multiple battery cells without end plates and side plates.

Based on the above-mentioned prior art, the applicant noticed that the current cable tie structure used to stabilize the battery module only focuses on the fixing of the battery module, that is, only independently improves and designs the cable tie structure, which is not related to the overall structure of the power battery. Structures don't have much binding. For example, two cable tie sections are respectively fixed to the end plates on both sides of the battery module by bolts, and then the battery module between the end plates is fixed by connecting the two cable tie sections. Although this method can achieve the stability of the battery module, when the battery module is fixed, the local position of the fixing bolt on the end plate is subject to a large expansion force, which makes the force on the end plate uneven, which easily leads to failure of the end plate The situation will affect the structural stability of the battery module.

Based on the above considerations, in order to solve the problem of fixing the battery module and improve the structural stability of the battery module, the applicant has designed a battery box after in-depth research. When fixing the battery module, the force on the overall structure is more uniform. , can not only improve the stability of the overall structure, but also realize the stability of more battery modules at the same time, and improve the performance of the power battery.

Referring to Fig. 1, Fig. 2 and Fig. 3, an embodiment of the present application provides a battery box 100, including a first beam body 10 and a second beam body 20 arranged opposite to each other along a first direction a, a mounting rod 30 and Fixing strap 40. Wherein, at least one of the first beam body 10 and the second beam body 20 defines an installation hole 50 along a second direction b intersecting the first direction a. The mounting rod 30 is passed through the installation hole 50 along the second direction b, and the fixing belt 40 is wound around the mounting rod 30 along the first direction a, and is surrounded by the first beam body 10 and the second beam body 20 to form At least one fixing space 60 is used for accommodating the battery module 201 .

Specifically in this embodiment, the first beam body 10 and the second beam body 20 are arranged parallel to each other, the first direction a is the width direction of the first beam body 10 and the second beam body 20, and the second direction b is the width direction of the first beam body 20. The longitudinal direction of the body 10 and the second beam body 20 , and the second direction b and the first direction a are perpendicular to each other.

The first beam body 10 and the second beam body 20 are arranged parallel to and spaced apart from each other, and the battery module 201 can be accommodated between the first beam body 10 and the second beam body 20 . At least one of the first beam body 10 and the second beam body 20 defines a mounting hole 50 along its longitudinal direction for the mounting rod 30 to pass through, and the fixing belt 40 is wound around the mounting rod 30 along the first direction a, Thus, the fixing belt 40 together with the first beam body 10 and the second beam body 20 forms a fixing space 60 , and fixes the battery module 201 in the fixing space 60 .

It should be noted that, in some specific embodiments, an installation hole 50 can be opened on one of the first beam body 10 and the second beam body 20 , and the mounting rod 30 can pass through the installation hole 50 . Thus, one end of the fixing belt 40 can be wound around the mounting rod 30 of one of the first beam body 10 and the second beam body 20 along the first direction a, and the other end can be connected to the first beam body by other fixing methods. 10 is fixedly connected with the other of the second beam body 20 . For example, the other end of the fixing belt 40 can be fixed to the other of the first beam body 10 and the second beam body 20 through bolt connection or buckle connection. In this way, the fixing band 40 and the first beam body 10 and the second beam body 20 can enclose together to form a fixing space 60 and fix the battery module 201 therein.

In addition, in another embodiment, installation holes 50 may also be provided on both the first beam body 10 and the second beam body 20 , and the mounting rods 30 are penetrated in both installation holes 50 . Thus, the first and last ends of the fixing belt 40 are respectively wound on the mounting rods 30 of the first beam body 10 and the second beam body 20, and the first and last ends of the fixing belt 40 are fixed to realize the connection between the fixing belt 40 and the first beam body 20. The first beam body 10 and the second beam body 20 together form a fixing space 60 and fix the battery module 201 therein.

It can be understood that the above two implementations can be selected according to the specific structure of the battery module 201 , so that the fixing space 60 can be adapted to the specific structure of the battery module 201 , so as to better fix the battery module 201 .

In addition, one or more fixing straps 40 may be provided, and the specific number may be determined according to the number of battery modules 201 to be fixed. Specifically, a plurality of battery cells are arranged between the first beam body 10 and the second beam body 20 along the first direction a, thereby forming a group of battery modules 201 . Each fixing strap 40 is used to fix a group of battery modules 201 , therefore, the number of fixing straps 40 corresponds to the number of groups of battery modules 201 .

When a group of battery modules 201 is arranged between the first beam body 10 and the second beam body 20 , one fixing strap 40 is provided. The fixing belt 40 and the first beam body 10 and the second beam body 20 together form a fixing space 60 , and the fixing belt 40 fixes the battery pack module 201 in the fixing space 60 along the first direction a. When multiple sets of battery modules 201 are arranged between the first beam body 10 and the second beam body 20 , the multiple sets of battery modules 201 are arranged between the first beam body 10 and the second beam body 20 along the second direction b. At this time, the number of fixing straps 40 is set to be the same as that of the battery modules 201 , and is also arranged in a one-to-one correspondence with multiple sets of battery modules 201 along the second direction b. Thus, the plurality of fixing straps 40 and the first beam body 10 and the second beam body 20 together form a plurality of fixing spaces 60 , and a plurality of sets of battery modules 201 are fixed in each fixing space 60 in a one-to-one correspondence. Inside.

Through the above structure, when the fixing belt 40 is tightened to fix the battery module 201, the tension of the fixing belt 40 is applied to a local position of the mounting rod 30, and the mounting rod 30 can transmit the local pulling force to the entire rod body, Further, the tension is transmitted to the first beam body 10 and the second beam body 20 . Thus, the force on the battery case 100 can be more uniform, and the structural stability of the battery case 100 can be improved. In addition, since the mounting rod 30 can transmit the local tension to the first beam body 10 and the second beam body 20, the force bearing capacity of the first beam body 10 and the second beam body 20 is higher, thereby More groups of battery modules 201 can be fixed at the same time, which improves the energy density of the battery case 100 .

In some embodiments, only the installation hole 50 is opened on the first beam body 10 along the second direction b, and the installation gap 70 communicating with the installation hole 50 is opened on the first beam body 10, and the fixing belt 40 passes through it. The mounting notch 70 of the connected first beam body 10 is wound around the exposed mounting rod 30 .

In some other embodiments, the installation hole 50 is only opened on the second beam body 20 along the second direction b, and the installation notch 70 communicating with the installation hole 50 is opened on the second beam body 20, and the fixing belt 40 is connected with The mounting gap 70 of the connected second beam body 20 is wound around the exposed mounting rod 30 .

In some other embodiments, the first beam body 10 and the second beam body 20 are provided with installation holes 50 along the second direction b, and the first beam body 10 and the second beam body 20 are provided with their own installation holes 50 There are connected installation notches 70 , and each fixing strap 40 is wound around the exposed mounting rod 30 through each installation notch 70 .

In order to better connect the fixing belt 40 to the mounting bar 30 , each beam body is provided with a mounting notch 70 , and the mounting notch 70 communicates with the mounting hole 50 . When the mounting rod 30 is passed through the mounting hole 50 , the mounting rod 30 can be exposed through the mounting notch 70 , so that the fixing belt 40 can be wound around the exposed mounting rod 30 .

It should be noted that when the battery module 201 is arranged between the first beam body 10 and the second beam body 20, in order to protect the battery module 201, the height of the first beam body 10 and the second beam body 20 is usually higher than that of the battery module. 201 height. Therefore, an installation gap 70 is provided on at least one of the first beam body 10 and the second beam body 20, and the fixing strap 40 is wound around the mounting rod 30 from the installation gap 70, so that the installation height of the fixing strap 40 can be reduced. , make the height of the fixing band 40 match the height of the battery module 201, so that the fixing band 40 can limit the position of the battery module 201 along the height direction, avoid a gap between the fixing band 40 and the battery module 201, and improve the battery module 201 stability.

Further, there are at least two installation notches 70, and each installation notch 70 is arranged at intervals along the second direction b. Understandably, since the installation notches 70 are used to wrap the fixing strap 40 around the exposed mounting rod 30 , the number of the installation notches 70 needs to match the number of the fixing straps 40 . When multiple fixing belts 40 are provided, multiple installation notches 70 are provided and arranged at intervals along the second direction b to correspond to the fixing belts 40 one by one.

That is to say, in some embodiments in which the installation hole 50 is opened only on the first beam body 10 along the second direction b, at least two installation notches 70 communicating with the installation hole 50 are provided on the first beam body 10 , and Each installation notch 70 is arranged at intervals along the second direction b.

In some other embodiments where the installation hole 50 is opened only on the second beam body 20 along the second direction b, at least two installation notches 70 communicating with the installation hole 50 of the second beam body 20 are provided on the second beam body 20 , and each installation The notches 70 are arranged at intervals along the second direction b.

In still other embodiments in which the first beam body 10 and the second beam body 20 are provided with installation holes 50 along the second direction b, the first beam body 10 and the second beam body 20 are both provided with their own installation holes 50 There are at least two installation notches 70 in communication, and each installation notch 70 is arranged at intervals along the second direction b.

In some other embodiments in which the first beam body 10 and the second beam body 20 are provided with installation holes 50 along the second direction b, the number of mounting rods 30 is two, and the two mounting rods 30 are respectively installed on the Inside the mounting holes 50 of the first beam body 10 and the second beam body 20 . Wherein, each fixing strap 40 is wound around the two mounting rods 30 along the first direction a, and keeps both ends of the mounting rods 30 fixed to each other.

Specifically, a first installation hole 51 is opened through the first beam body 10 along the second direction b, and a second installation hole 52 is opened through the second beam body 20 along the second direction b. The first mounting rod 31 passes through the first mounting hole 51 , and the second mounting rod 32 passes through the second mounting hole 52 . Each of the fixing straps 40 is respectively wound on the first mounting rod 31 and the second mounting rod 32 along the first direction a, and the two ends of the fixing straps 40 are fixed to each other.

Thus, the first hanging rod 31 can disperse the stress on the first beam body 10 , and the second hanging rod 32 can disperse the stress on the second beam body 20 . The force on the first beam body 10 and the second beam body 20 is more uniform, so that the capacity of the battery box 100 to accommodate the battery module can be increased, and the energy density of the battery module 201 can be improved.

Further, in the embodiment where the first beam body 10 and the second beam body 20 are provided with at least two installation notches 70 communicating with their own installation holes 50 and arranged at intervals along the second direction b, the first beam body 10 It is paired with each installation notch 70 on the second beam body 20 along the first direction a, and a group of installation notches 70 paired with each fixing belt 40 is arranged on the exposed mounting rod 30, and is connected with the first beam body 10 and the second beam body 20 enclose and form a fixed space 60 arranged along the second direction b.

A first installation notch 71 is defined on the first beam body 10 , and the first installation notch 71 communicates with the first installation hole 51 to expose the first mounting rod 31 . A second mounting notch 72 is defined on the second beam body 20 , and the second mounting notch 72 communicates with the second mounting hole 52 to expose the second mounting rod 32 . In addition, the first installation notches 71 and the second installation notches 72 are provided in one-to-one correspondence along the first direction a, and each first installation notch 71 and each second installation notch 72 corresponding to each other form a group, and each group of the first installation notch 72 forms a group. One installation notch 71 and the second installation notch 72 correspond to one fixing belt 40 .

In addition, the widths of the first installation notch 71 and the second installation notch 72 are slightly larger than the width of the fixing belt 40, thus, when the two ends of the fixing belt 40 are respectively set in the first installation notch 71 and the second installation notch 72 and wrap around When installed on the first mounting rod 31 and the second mounting rod 32, the first installation notch 71 and the second installation notch 72 can limit the fixing belt 40 located therein along the second direction b, ensuring that the fixing belt 40 Stability on the first mounting rod 31 and the second mounting rod 32 .

Referring to FIGS. 4-7 , in some embodiments, the battery case 100 further includes fixing pieces 80 for fixing both ends of the fixing belt 40 . The head and tail ends of the fixing band 40 are respectively wound around the first mounting rod 31 and the second mounting rod 32, and are connected to each other after bypassing the first mounting rod 31 and the second mounting rod 32 respectively, and then fixed The first and last ends of the fixing belt 40 are fixed by the member 80 . Thus, the fixing belt 40 forms a closed loop between the first mounting rod 31 and the second mounting rod 32, and by adjusting the length of the closed loop of the fixing belt 40, the tightness of the fixing belt 40 can be adjusted, thereby fixing the battery module 201 on the Between the first beam body 10 and the second beam body 20 .

It should be noted that, since the fixing piece 80 is used to fix the first and last ends of the fixing belt 40, the fixing piece 80 and the fixing belt 40 should be provided in a one-to-one correspondence, that is, each fixing belt 40 needs to be provided with a corresponding fixing piece. 80 for fixing it.

As shown in FIG. 8 , in some embodiments, only the installation hole 50 is provided on the first beam body 10 along the second direction b, each fixing member 80 is provided with a fixing channel 81 along the first direction a, and each fixing belt 40 After the mounting rod 30 wound around the first beam body 10 along the first direction a, the head and tail ends pass through the fixing channel 81 of the fixing member 80 in directions away from each other and are fixed to each other.

As shown in Figure 8, in some other embodiments, only the second beam body 20 is provided with the mounting hole 50 along the second direction b, and each fixing member 80 is provided with a fixing channel 81 along the first direction a, and each fixing belt 40 is wound around the rear of the mounting rod 30 of the second beam body 20 along the first direction a, and its front and rear ends pass through the fixing channel 81 of the fixing member 80 in a direction away from each other and are fixed to each other.

As shown in FIG. 8 , in some other embodiments, the first beam body 10 and the second beam body 20 are provided with mounting holes 50 along the second direction b, and each fixing member 80 is provided through and fixed along the first direction a. Channel 81 , each fixing belt 40 is wound around the first beam body 10 and behind the mounting rod 30 of the second beam body 20 along the first direction a, and its first and last ends pass through the fixing channel of the fixing member 80 in directions away from each other 81 and fixed to each other.

Specifically in this embodiment, each fixing member 80 defines a fixing channel 81 along the first direction a. When the fixing belt 40 is wound around the first mounting rod 31 and the second mounting rod 32 along the first direction a, the head and tail ends of the fixing belt 40 are wound around the first mounting rod 31 and the second mounting rod 32 , and pass through the fixing channels 81 of the corresponding fixing parts 80 in directions away from each other. Thus, the first and last ends of the fixing belt 40 can be fixed by the fixing member 80 .

In addition, since both ends of the fixing belt 40 pass through the fixing channel 81 for fixing, the height of the fixing channel 81 only needs to be slightly greater than twice the thickness of the fixing belt 40 . Thus, the height of the fixing member 80 can be controlled within a small range. When the fixing member 80 is disposed on the fixing belt 40 , it occupies less space in the height direction, so that the space utilization rate of the battery box 100 in the height direction can be further improved.

Please refer to FIG. 9 , in some embodiments, the battery box 100 further includes a frame body 90 , and the two ends of the first beam body 10 and the second beam body 20 along the second direction b are limited in the frame body 90 .

Specifically in this embodiment, the frame body 90 includes four frame beams 91 connected end to end, and the four frame beams 91 enclose each other to form a rectangular accommodation space 92 . Both ends of the first beam body 10 and the second beam body 20 abut against a set of frame beams 91 opposite to each other, and both the first beam body 10 and the second beam body 20 are accommodated in the rectangular accommodation space 92 . Thus, the two ends of the first mounting rod 31 in the first mounting hole 51 can respectively abut against a group of frame beams 91 oppositely arranged. Similarly, the second mounting rod 32 in the second mounting hole 52 The two ends of each can respectively abut on a set of frame beams 91 which are arranged oppositely. The set of frame beams 91 arranged opposite to each other can limit the first mounting rod 31 and the second mounting rod 32 along the second direction b, so as to prevent the first mounting rod 31 and the second mounting rod 32 from extending out of the first mounting rod 31 and the second mounting rod 32. A beam body 10 and a second beam body 20 can ensure the stability of the first mounting rod 31 and the second mounting rod 32 in the first beam body 10 and the second beam body 20 .

Based on the same concept as the above-mentioned battery case 100 , the present application provides a battery, including a battery module 201 and the above-mentioned battery case 100 , wherein the battery module 201 is fixed in the battery case 100 .

Based on the same idea as the above-mentioned battery, the present application provides an electrical device, including an electrical main body and the above-mentioned battery.

When this application is specifically used, the two ends of the first beam body 10 and the second beam body 20 are respectively abutted against a group of frame beams 91 oppositely arranged, so that the first mounting rod 31 and the second mounting rod 32 are limited. Located in the first beam body 10 and the second beam body 20 . Multiple sets of battery modules 201 are accommodated between the first beam body 10 and the second beam body 20, and each set of battery modules 201 is correspondingly provided with a fixing belt 40, and the first and last ends of the fixing belt 40 are respectively wound around the On the first mounting rod 31 and the second mounting rod 32, and bypass the first mounting rod 31 and the second mounting rod 32 and pass through the fixing channel 81 of the fixing member 80 in a direction away from each other, through the fixing The first and last ends of the fixing belt 40 are fixed by the piece 80 . Thus, each set of battery modules 201 can be fixed in the corresponding fixing space 60 .

The battery case 100, the battery and the electrical device in the above embodiments have at least the following advantages:

1) The first mounting rod 31 and the second mounting rod 32 can distribute the tension of the fixing belt 40 to the entire first beam body 10 and the second beam body 20, so that the force on the battery box 100 is more uniform, Improve the structural stability of the battery box 100 to ensure the stable installation of the battery module 201 inside the battery box 100;

2) The setting of the first installation notch 71 and the second installation notch 72 not only facilitates the winding of the fixing belt 40 on the first mounting rod 31 and the second mounting rod 32, but also enables the fixing belt 40 to be aligned along the second direction b. Positioning is performed to prevent the fixing belt 40 from shifting along the second direction b;

3) The fixing member 80 can reduce the occupied space in the height direction and improve the space utilization rate of the battery box 100 in the height direction while fixing the first and last ends of the fixing belt 40 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims

A battery case, characterized in that it comprises:

The first beam body and the second beam body arranged opposite to each other along the first direction, at least one of them is provided with a mounting hole along a second direction intersecting with the first direction;

The mounting rod is inserted in the mounting hole along the second direction;

a fixing belt, wound around the mounting rod along the first direction, the fixing belt surrounds the first beam body and the second beam body to form a fixed space, and the fixed space is used for accommodating battery module.
The battery box according to claim 1, wherein the first beam body or the second beam body penetrates through the installation hole along the second direction, and the first beam body or the second beam body The beam body is provided with an installation notch communicating with the installation hole of itself, and the fixing belt is wound around the exposed on the mounting bar.
The battery box according to claim 2, wherein there are at least two installation notches of the first beam or the installation notches of the second beam, and each of the installation notches is along the The second direction is arranged at intervals.
The battery box according to claim 1, wherein the first beam body and the second beam body both penetrate through the installation hole along the second direction, and the first beam body and the second beam body The two beams are provided with installation gaps communicating with the installation holes of themselves, and the fixing belts are wound around the exposed mounting rods through the installation gaps.
The battery box according to claim 4, wherein the number of the mounting rods is two, and the two mounting rods respectively pass through the mounting hole of the first beam body, the In the installation hole of the second beam body; each of the fixing straps is wound around the two hanging rods along the first direction, and keeps both ends of the head and tail fixed to each other.
The battery box according to claim 4, wherein there are at least two installation notches of the first beam body, and the installation notches of the first beam body are spaced apart along the second direction Arrangement: there are at least two installation notches on the second beam body, and the installation notches on the second beam body are arranged at intervals along the second direction.
The battery box according to claim 6, wherein the mounting notches on the first beam body and the second beam body are paired along the first direction, and the fixing belt is at least 2. A set of mounting notches paired with each of the fixing straps is set around the exposed mounting rod, and is surrounded by the first beam body and the second beam body to form a The fixed space is arranged in the second direction.
The battery case according to claim 1, characterized in that the battery case further comprises fixing pieces for fixing the first and last ends of the fixing belt.
The battery box according to claim 8, wherein the first beam or the second beam penetrates through the installation hole along the second direction, and each of the fixing pieces runs along the first direction. A fixed channel is opened through, and the fixed belt is wound around the mounting rod of the first beam body or the mounting rod of the second beam body along the first direction, and its head and tail ends are along the The directions diverging from each other pass through the fixing channel of the fixing member and are fixed to each other.
The battery box according to claim 8, wherein the first beam body and the second beam body are both provided with the installation holes along the second direction, and each of the fixing pieces is Direction runs through to set up a fixed passage, the fixed belt is arranged around the first beam body and the second beam body behind the mounting rods along the first direction, and the two ends of the first and last beams pass through in directions away from each other. passing through the fixing channel of the fixing member and fixing each other.
The battery box according to claim 1, wherein the battery box further comprises a frame body, and the two ends of the first beam and the second beam along the second direction are limited to the frame within the subject.
A battery, characterized by comprising a battery module and the battery case according to any one of claims 1-11, the battery module being fixed in the battery case.
An electrical device, characterized by comprising an electrical main body and the battery according to claim 12.