CN212907944U

CN212907944U - Battery frame and battery module

Info

Publication number: CN212907944U
Application number: CN202021757578.9U
Authority: CN
Inventors: 李德连; 周鹏
Original assignee: Sinoev Hefei Technologies Co Ltd
Current assignee: Sinoev Hefei Technologies Co Ltd
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2021-04-06
Anticipated expiration: 2030-08-20

Abstract

The application provides a battery frame and battery module relates to battery technical field. The battery frame comprises two end plates, two side plates and a plurality of molding keys, wherein the molding keys are of a strip-shaped structure. The two ends of the end plate are respectively provided with a containing groove, and the side plate comprises a side plate main body and extension sections positioned at the two ends of the side plate main body. Each compression key and each extension section are inserted into one containing groove, and the compression keys extrude the extension sections to enable at least one part of the extension sections to be attached to the groove walls of the containing grooves, so that the two end plates and the two side plates are enclosed to form containing spaces for containing batteries. From this, through the cooperation between storage tank, die mould key and the extension section, can realize the fixed of end plate and curb plate, need not to realize the fixed of end plate and curb plate through the laser welding mode, reduce cost to maintainability is high.

Description

Battery frame and battery module

Technical Field

The application relates to the technical field of batteries, in particular to a battery frame and a battery module.

Background

Batteries (e.g., prismatic batteries, pouch batteries, etc.) may themselves bulge due to charge-discharge cycling. In order to limit the self-bulging of the batteries, certain pretightening force and structural strength are usually given to the batteries when the batteries are grouped, so that the grouping consistency and the cycle life of the batteries are improved. The square battery module often includes a metal frame (composed of end plates and side plates), and the connection and fixation of the side plates in the metal frame and the end plates on both sides are usually achieved by laser welding. However, the laser welding method has disadvantages such as high equipment cost.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a battery frame and battery module, it can realize the fixed of end plate and curb plate through the cooperation between storage tank, die mould key and the extension section, need not to realize the fixed of end plate and curb plate through the laser welding mode, reduce cost to because the dismouting can be relapse to end plate and curb plate junction, consequently still have the characteristics that maintainability is high.

The embodiment of the application is realized as follows:

in a first aspect, embodiments of the present invention provide a battery frame, which includes two end plates, two side plates, and a plurality of press keys, wherein the press keys are in a strip structure,

the two ends of the end plate are respectively provided with a containing groove;

the side plate comprises a side plate main body and extension sections positioned at two ends of the side plate main body;

each compression key and one extension section are inserted into one accommodating groove, and the compression keys extrude the extension sections to enable at least one part of the extension sections to be attached to the groove walls of the accommodating grooves, so that the two end plates and the two side plates are enclosed to form accommodating spaces for accommodating batteries.

In an alternative embodiment, the profiling key is in a wedge-shaped structure, the profiling key comprises a guide part and a pressing part,

the sum of the size of the cross section of the guide part and the thickness of the extension section is smaller than the size of the cross section of the accommodating groove, and the size of the cross section of the guide part is larger as the guide part approaches the extrusion part;

the size of the cross section of the pressing part is larger than that of the cross section of the guide part.

In an alternative embodiment, the cross-section of the compression key is oblong.

In an alternative embodiment, the end plate comprises a first side wall facing away from the receiving space;

the first side wall is provided with the accommodating groove, and the length extending direction of the accommodating groove is parallel to the width extending direction of the end plate;

the side plate main body comprises a main body section and two connecting sections, the connecting sections are located at two ends of the main body section, the extending sections are connected with the main body section through the connecting sections, and the extending sections extend towards the direction close to the accommodating space.

In an alternative embodiment, the receiving groove comprises a first groove,

the depth direction of the first groove is parallel to the thickness direction of the end plate, the length extension direction of the first groove is parallel to the width extension direction of the end plate, and the thickness of the first groove corresponds to the thickness of the extension section.

In an alternative embodiment, a second groove is provided on at least one groove sidewall of the first groove,

a second recess is provided for receiving a portion of said compression key, said second recess having a recess sidewall adjacent said recess base of said first recess and said first sidewall surface spaced less than said recess base of said first recess and said first sidewall surface.

In an alternative embodiment, the end plate includes a first side wall, a second side wall and a connecting side wall, the second side wall is located between the first side wall and the accommodating space, and the connecting side wall connects the first side wall and the second side wall;

the accommodating groove is formed in the connecting side wall, and the length extending direction of the accommodating groove is parallel to the width extending direction of the end plate.

In an optional embodiment, the extension section includes a first extension portion and a second extension portion, the first extension portion is connected to the side plate main body via the second extension portion, and an included angle between the first extension portion and the second extension portion is an acute angle, a right angle, or an obtuse angle;

the accommodating groove comprises a first groove, a second groove and a third groove;

the depth direction of the first groove is perpendicular to the thickness direction of the end plate, the length extension direction of the first groove is parallel to the width extension direction of the end plate, and the first groove is used for accommodating the second extension part;

the second groove is arranged on at least one groove side wall of the first groove and used for accommodating part of the press key, and the distance between the groove side wall of the second groove close to the groove bottom of the first groove and the surface of the connecting side wall is smaller than the distance between the groove bottom of the first groove and the surface of the connecting side wall;

the third groove is disposed on one groove sidewall of the first groove, and the third groove is used for accommodating the first extension portion.

In an alternative embodiment, the end plate includes a second side wall adjacent to the receiving space;

the accommodating groove is formed in the second side wall, and the length extending direction of the accommodating groove is parallel to the width extending direction of the end plate.

In a second aspect, an embodiment of the present application provides a battery module, where the battery module includes a plurality of battery cells and the battery frame of any one of the foregoing embodiments, and the plurality of battery cells are disposed in an accommodating space of the battery frame.

The embodiment of the application provides a battery frame and battery module, and this battery frame includes two end plates, two curb plates and a plurality of profiling key. The two ends of the end plate are respectively provided with a containing groove, the two ends of the side plate are respectively provided with an extending section corresponding to the containing groove, and the two extending sections are connected through the main body of the side plate. During assembly, each compression key and one extension section are inserted into one accommodating groove, and the compression keys extrude the extension sections to enable at least one part of the extension sections to be attached to the groove walls of the accommodating grooves, so that the two end plates and the two side plates are enclosed to form accommodating spaces for accommodating batteries. Therefore, welding is not needed, the joints of the end plates and the side plates are formed by adopting filling type key pressing, the connection is reliable, and the consistency is high; compared with the equipment used in laser welding, the equipment used in the scheme has low cost; the connecting part of the end plate and the side plate can be repeatedly disassembled and assembled, and the maintainability is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is a schematic structural diagram of a press key according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram illustrating a screenshot of a molding key provided in an embodiment of the present application;

FIG. 5 is an enlarged view of section II of FIG. 1;

FIG. 6 is a schematic structural diagram of an end plate provided in an embodiment of the present application;

FIG. 7 is an enlarged schematic view of section III of FIG. 6;

FIG. 8 is a schematic diagram illustrating a process of connecting end plates and side plates according to an embodiment of the present disclosure;

FIG. 9 is a schematic view of a profiled key according to an embodiment of the present disclosure before and after insertion;

fig. 10 is a schematic structural view of a receiving groove and an extending section provided in the embodiment of the present application;

fig. 11 is a schematic structural view of another accommodating groove and an extending section provided in the embodiment of the present application;

fig. 12 is a schematic view illustrating an assembly process of a battery module according to an embodiment of the present disclosure.

Icon: 100-a battery frame; 110-an end plate; 111-a first side wall; 112-a second side wall; 113-connecting the sidewalls; 115-a receiving groove; 116-a first groove; 117-second groove; 118-a third groove; 120-side plate; 122-side plate body; 123-connecting segment; 124-a body section; 127-an extension; 128-a first extension; 129-a second extension; 130-a press key; 131-a guide; 132-a press; 210-individual cells; 220-cushion.

Detailed Description

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

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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

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

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

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The side plates and the end plates are generally fixedly connected by laser welding to form a cell frame. However, this approach has the following disadvantages: the cost of laser welding equipment is high; in the later stage, if the single battery cell accommodated in the battery frame is to be replaced, the battery frame needs to be destructively disassembled; the requirement on the precision of the side plates and the end plates is high, deviation control is difficult, and connection consistency is difficult to control.

Based on this, the embodiment of the application provides a battery frame and a battery module, laser welding is not needed, reliable connection is realized at the joint of the end plate and the side plate through filling type key press forming, and the consistency is high; meanwhile, laser welding equipment is not needed, so that the equipment cost is low; and the connecting part of the end plate and the side plate can be repeatedly disassembled and assembled, so that the maintainability is high.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a battery frame 100 according to an embodiment of the present disclosure, and fig. 2 is an enlarged schematic diagram of a portion i in fig. 1. The battery frame 100 includes two end plates 110, two side plates 120, and a plurality of press keys 130. The end plates 110 are each provided at both ends thereof with a receiving groove 115. Each side plate 120 includes a side plate main body 122 and extension sections 127 at both ends of the side plate main body 122. The press key 130 is in a strip structure.

In fixing an end plate 110 and a side plate 120, a press key 130 and an extension 127 are inserted into a receiving groove 115. During the insertion process, the profiling key 130 presses the extension 127, so that at least a portion of the extension 127 is attached to the groove wall of the receiving groove 115 where the extension 127 is located, thereby fixedly connecting the end plate 110 and the side plate 120. By repeating the above processes, the two end plates 110 and the two side plates 120 enclose a receiving space for receiving the cell 210. After the enclosure, the two end plates 110 are disposed opposite to each other, and the two side plates 120 are disposed opposite to each other.

The receiving groove 115 and the profiling key 130 cooperate to form the extending section 127 of the side plate 120 into a specific shape to tightly fill the receiving groove 115. The tight fit of the interference causes a significant static friction between the receiving groove 115, the extending section 127 and the press key 130, so that the end plate 110 and the side plate 120 are effectively connected and provide sufficient connection strength.

The battery frame 100 does not need to be welded by welding equipment, so that the equipment investment cost is low. The battery frame 100 in the present application is a key press connection without any damage to the cross-sectional thickness of the material body, i.e.: the connection strength is the body strength; in the welding mode, the strength of the welding seam determines the maximum expansive force which can be borne by the battery frame, and the welding mode is a connection mode which can damage the body, so that the strength of the side plate body can be weakened to a certain extent, namely the strength of the welding seam is less than the strength of the body; it can be seen that the maximum expansion force that can be borne by the battery frame 100 of the present application is superior to the maximum expansion force of the battery frame formed by welding.

If the individual electric cores 210 in the battery frame 100 need to be replaced, the molding key 130 can be directly pressed out of the accommodating groove 115 by using equipment, and then the individual electric cores are detached, so that replacement can be realized; when the welding method is adopted, if the single battery cell needs to be replaced, parts such as welding seams, end plates, side plates and the like need to be damaged. Therefore, the battery frame 100 of the present application also has features such as maintainability.

Optionally, in this embodiment, there are various key press forming modes, and the specific shapes of the extension section 127 and the receiving groove 115 may be flexibly designed according to actual needs, as long as the detachable connection between the end plate 110 and the side plate 120 can be achieved without welding. The end plate 110 and the side plate 120 may be made of a metal material (e.g., aluminum).

Referring to fig. 3, fig. 3 is a schematic structural diagram of a press key 130 according to an embodiment of the present disclosure. The swage key 130 may have a smooth wedge-shaped configuration. The swage key 130 may be a steel part. The press key 130 may include a guide portion 131 and a pressing portion 132. The guide portion 131 is used for guiding so that the press key 130 is inserted into the receiving groove 115. The pressing portion 132 is used for pressing the extending section 127 when being inserted into the receiving groove 115, so that at least a part of the extending section 127 is attached to the groove wall of the receiving groove 115.

Optionally, the guide portion 131 is in a long strip shape, and a sum of a size of a cross section of the guide portion 131 and a thickness of the extension section 127 is smaller than a size of a cross section of the accommodating groove 115. Thereby, the guide portion 131 is conveniently inserted into the receiving groove 115.

The size of the cross section of the guide portion 131 becomes larger as approaching the pressing portion 132. The pressing portion 132 has a long bar shape, and the size of the cross section of the pressing portion 132 is larger than that of any cross section of the guide portion 131. Therefore, the pressing portion 132 is also inserted into the receiving groove 115 under the action of the guiding portion 131, and further presses the extending section 127, so that the extending section 127 is formed into a specific shape.

Alternatively, the specific shape of the guide portion 131 may be set according to actual requirements. For example, in the form of a guide cone, or in the form of a strip having a guide slope as shown in fig. 3.

Alternatively, in order to prevent the press key 130 from rotating in the accommodating groove 115 under the condition that the end plate 110 is under tension, the cross section of the press key 130 may be oblong as shown in fig. 4. Thereby, the fixed connection of the end plate 110 and the side plate 120 can be ensured.

Alternatively, in this embodiment, the end plate 110 and the side plate 120 may have the following structures. Referring to fig. 1 to 2 and 5 to 6, fig. 5 is an enlarged schematic view of a portion ii in fig. 1, and fig. 6 is a schematic structural view of an end plate 110 according to an embodiment of the present disclosure. The end plate 110 includes a first sidewall 111, a second sidewall 112, and a connecting sidewall 113. The first side wall 111 faces away from the accommodating space, and the second side wall 112 is close to the accommodating space, that is, the second side wall 112 is located between the first side wall 111 and the accommodating space. The connecting sidewall 113 connects the first sidewall 111 and the second sidewall 112.

The receiving groove 115 is disposed on the first side wall 111, and a length extending direction of the receiving groove 115 is parallel to a width extending direction of the end plate 110, that is, the length extending direction of the receiving groove 115 is parallel to the width extending direction of the side plate 120.

The side plate body 122 may include a body section 124 and connecting sections 123 at both ends of the body section 124. The extension section 127 is connected to the main body section 124 via the connecting section 123. The extension 127 extends toward the receiving space.

When the extension segment 127 is inserted into the receiving groove 115, the connecting segment 123 contacts the first sidewall 111, and a portion of the main body segment 124 contacts the connecting sidewall 113. Under the pressing of the press key 130, at least a portion of the extension 127 is attached to the groove wall of the receiving groove 115.

Optionally, referring to fig. 6 and 7, fig. 7 is an enlarged schematic view of a portion iii in fig. 6. As an embodiment, the receiving groove 115 may include a first groove 116. The depth direction of the first groove 116 is parallel to the thickness direction of the end plate 110, that is, the depth direction of the first groove 116 is parallel to the length direction of the side plate 120. The thickness of the first groove 116 corresponds to the thickness of the extension 127 so as to accommodate the extension 127. Wherein, the thickness extending direction of the first groove 116 is perpendicular to the plane of the connecting sidewall 113.

Alternatively, the receiving groove 115 may only include the first groove 116. The first recess 116 may be a rectangular slot. The thickness of the rectangular groove is set according to the press key 130 and the extension section 127, so that the press key 130 and the extension section 127 can be accommodated in the rectangular groove, and the press key 130 and the extension section 127 are both in contact with the groove wall of the rectangular groove, so as to realize the fixed connection of the end plate 110 and the side plate 120.

Optionally, referring to fig. 7 again, the accommodating groove 115 may further include a second groove 117. A second groove 117 is disposed on at least one groove sidewall of the first groove 116. That is, one of the groove sidewalls of the first groove 116 is provided with one second groove 117, or two groove sidewalls of the first groove 116 are respectively provided with one second groove 117. Of the two groove side walls of the second groove 117, the distance between the groove side wall close to the groove bottom of the first groove 116 and the surface of the first side wall 111 is greater than the distance between the other groove side wall (i.e., the groove side wall far from the groove bottom of the first groove 116) and the surface of the first side wall 111, and the distance between the other groove side wall and the surface of the first side wall 111 is not 0; the distance between the groove side wall near the groove bottom of the first groove 116 and the surface of the first side wall 111 is smaller than the distance between the groove bottom of the first groove 116 and the surface of the first side wall 111.

When a second recess 117 is provided, the second recess 117 may be used to receive a portion of the compression key 130. When the press key 130 is inserted, a part of the press key 130 is accommodated in the first groove 116, another part of the press key 130 is accommodated in the second groove 117, and the press key 130 can press the extension 127 to be attached to the groove sidewall of the first groove 116, which is not provided with the second groove 117, so as to fix the end plate 110 and the side plate 120.

When only one second recess is provided, it is also possible that the first recess 116 is adapted to receive the profiling key 130. After the press key 130 is inserted into the first groove 116, the press key 130 presses the extension 127 to be attached to the groove sidewall of the first groove 116 where the second groove 117 is provided and the groove wall (including the groove bottom and the groove sidewall) of the second groove 117.

When two second grooves 117 are respectively disposed on two groove sidewalls of the first groove 116, one of the second grooves 117 is used for accommodating a portion of the press key 130, and the other second groove 117 is used for accommodating a portion of the extension 127. Thus, by providing two second grooves 117, the coupling effect of the end plate 110 and the side plate 120 can be further ensured.

Alternatively, the specific shape of the second groove 117 for receiving a portion of the press key 130 may be set according to the structure of the press key 130. For example, if the cross-section of the press key 130 is oblong, the cross-section of the second groove 117 in fig. 7 away from the connecting sidewall 113 may be semi-oblong, which matches the oblong of the cross-section of the press key 130, such that when a portion of the press key 130 is received in the second groove 117, the surface of the press key 130 may contact the groove wall of the second groove 117.

Referring to fig. 3, 7 to 9, fig. 8 is a schematic view illustrating a connection process between an end plate 110 and a side plate 120 according to an embodiment of the present disclosure, and fig. 9 is a schematic view illustrating a compression key 130 according to an embodiment of the present disclosure before and after insertion. Referring to fig. 3 and 7 to 9, the connection between one end plate 110 and one side plate 120 is illustrated, wherein the accommodating groove 115 includes 1 first groove 116 and two second grooves 117.

When an end plate 110 and a side plate 120 are fixedly connected, the extension 127 of the side plate 120 is inserted into the first groove 116 from top to bottom. Then, the guiding portion 131 of the press key 130 is inserted into one of the second grooves 117, the pressing portion 132 is inserted into the accommodating groove 115 along with the guiding portion 131, and in the process that the pressing portion 132 is inserted into the accommodating groove 115, the pressing portion 132 gradually presses the extending section 127 in the accommodating groove 115 under the pressure, so that at least a part of the extending section 127 is attached to the groove wall of the first groove 116 and the groove wall of the other second groove 117. Thereby, the extension 127 in the receiving groove 115 is formed in a predetermined shape, and the end plate 110 is fixedly connected to the side plate 120.

When disassembly is desired, the swage key 130 can be pressed out of the receiving groove 115 using equipment and then the end plate 110 and the side plate 120 can be separated.

Referring to fig. 1 and 10, fig. 10 is a schematic structural view of a receiving groove 115 and an extending section 127 provided in the present embodiment. As shown in a of fig. 10, the end plate 110 includes a first side wall 111, a second side wall 112, and a connecting side wall 113. The first sidewall 111 faces away from the accommodating space, and the second sidewall is close to the accommodating space 112, that is, the second sidewall is located between the first sidewall 111 and the accommodating space. The connecting sidewall 113 connects the first sidewall 111 and the second sidewall 112. The receiving groove 115 is disposed on the connecting side wall 113, and a length extending direction of the receiving groove 115 is parallel to a width extending direction of the end plate 110, that is, the length extending direction of the receiving groove 115 is parallel to the width extending direction of the side plate 120.

In this embodiment, the receiving groove 115 may include a first groove 116, and a depth direction of the first groove 116 is perpendicular to a thickness direction of the end plate 110, that is, the depth direction of the first groove 116 is perpendicular to a length extending direction of the side plate 120. The thickness of the first groove 116 corresponds to the thickness of the extension 127 so as to accommodate the extension 127.

Alternatively, the receiving groove 115 may only include the first groove 116. For a description of how the end plate 110 is connected to the side plate 120 through the first groove 116, reference may be made to the above detailed description, and further description is omitted here.

Optionally, the receiving groove 115 may further include at least one second groove 117. The second groove 117 is provided on a groove side wall of the first groove 116. One of the second recesses 117 may be used to receive a portion of the compression key 130. Of the two groove side walls of the second groove 117, the distance between the groove side wall close to the groove bottom of the first groove 116 and the surface of the connecting side wall 113 is greater than the distance between the other groove side wall (i.e., the groove side wall far from the groove bottom of the first groove 116) and the surface of the connecting side wall 113, and the distance between the other groove side wall and the surface of the connecting side wall 113 is not 0; the distance between the groove side wall close to the groove bottom of the first groove 116 and the surface of the connecting side wall 113 is smaller than the distance between the groove bottom of the first groove 116 and the surface of the connecting side wall 113.

The end plate 110 and the side plate 120 are fixedly connected by the cooperation of the first groove 116, the second groove 117, the profiling key 130 and the extension 127. For the description of how the end plate 110 is connected to the side plate 120 through the first groove 116 and the at least one second groove 117, reference may be made to the above detailed description, and further description is omitted here.

Optionally, the extension 127 may include a first extension 128 and a second extension 129. The first extension 128 is connected to the side plate main body 122 via the second extension 129. The included angle between the first extension 128 and the second extension 129 can be an acute angle, a right angle or an obtuse angle. The receiving groove 115 may include the first groove 116, the at least one second groove 117, and the third groove 118. The distance between the third groove 118 and the surface of the connecting sidewall 113 is greater than the distance between the second groove 117 and the surface of the connecting sidewall 113. The first recess 116 may be used to receive the second extension 129. The third groove 118 is disposed on one groove sidewall of the first groove 116, and the third groove 118 is used for accommodating the first extension 128.

The third groove 118 is communicated with the first groove 116, and an included angle between the third groove 118 and the first groove 116 is matched with an included angle between the first extending portion 128 and the second extending portion 129. Therefore, as can be seen from fig. 8 a and b, when the extension 127 is inserted into the receiving groove 115, the first extension 128 may be received in the third groove 118, the second extension 129 may be received in the first groove 116 and the second groove 117, and the extension 127 may be pressed by the press-type key 130 to form the shape b shown in fig. 8, so as to achieve the fixed connection between the end plate 110 and the side plate 120.

Referring to fig. 1 and 11, fig. 11 is a schematic structural view of another receiving groove 115 and an extending section 127 provided in the present embodiment. The end plate 110 includes a second sidewall 112 adjacent to the receiving space. The receiving groove 115 may be disposed on the second sidewall 112. The length extending direction of the receiving groove 115 is parallel to the width extending direction of the end plate 110, that is, the length extending direction of the receiving groove 115 is perpendicular to the length extending direction of the side plate 120.

The receiving groove 115 may include a first groove 116 having an L shape or an inverted L shape, and the extending section 127 has a shape corresponding to the first groove 116. The receiving groove 115 may further include a first groove 116 having an L shape or an inverted L shape, and at least one second groove 117, and the second groove 117 is disposed on a groove sidewall of the first groove 116. For a detailed description of how to fix the end plate 110 and the side plate 120 through the first groove 116 or through the first groove 116 and the second groove 117, reference may be made to the description of fig. 1 to 9, which is not repeated herein.

The receiving groove 115 may further include a third groove 118, and the third groove 118 is disposed on a groove sidewall of the first groove 116. The extension 127 may include a first extension 128 and a second extension 129. The first extension 128 is connected to the side plate main body 122 via the second extension 129. The included angle between the first extension 128 and the second extension 129 matches the included angle between the third groove 118 and the first groove 116. Thus, as shown in fig. 11 a and b, when the end plate 110 and the side plate 120 are to be fixed, the first extension 128 is received in the third recess 118, the second extension 129 is received in the first recess 116, and the end plate 110 and the side plate 120 are fixed by pressing the press key 130.

The structure of the receiving groove 115 and the extending section 127 shown in fig. 11 is similar to the structure of the receiving groove 115 and the extending section 127 shown in fig. 9 and 10, and the detailed description may refer to the detailed description of the receiving groove 115 and the extending section 127 shown in fig. 9 and 10, and is not repeated herein.

Referring to fig. 12, fig. 12 is a schematic view illustrating an assembly process of a battery module according to an embodiment of the present disclosure. The battery module may include a plurality of unit cells 210 and the battery frame 100. The plurality of single battery cores are arranged in the accommodating space of the battery frame. In assembly, as shown in a in fig. 12, the end plates 110 and the unit cells 210 may be arranged along the thickness direction of the unit cells 210. Then, as shown in b of fig. 12, the end plates 110 on both sides are pressed by the pressing tools, thereby pressing the dimension of the pre-assembled assembly to the set dimension L. Next, as shown in fig. 12 c, two side plates 120 are attached to both sides of the pre-assembly. Finally, as shown in d of fig. 12, 4 press keys 130 are pressed into the receiving groove 115, so that the two end plates 110 and the two side plates 120 are fixed.

Optionally, the battery module may further include a cushion 220. The cushion pad 220 is disposed between the unit cells 210 and the end plate 110. The buffer pad 220 may be made of an insulating material. In assembly, as shown in a of fig. 12, the cushion pad 220 of the end plate 110 and the unit cells 210 may be sequentially arranged in the thickness direction of the unit cells 210.

To sum up, the embodiment of the present application provides a battery frame and battery module, and this battery frame includes two end plates, two curb plates and a plurality of profiling keys. The two ends of the end plate are respectively provided with a containing groove, the two ends of the side plate are respectively provided with an extending section corresponding to the containing groove, and the two extending sections are connected through the main body of the side plate. During assembly, each compression key and one extension section are inserted into one accommodating groove, and the compression keys extrude the extension sections to enable at least one part of the extension sections to be attached to the groove walls of the accommodating grooves, so that the two end plates and the two side plates are enclosed to form accommodating spaces for accommodating batteries. Therefore, welding is not needed, the joints of the end plates and the side plates are formed by adopting filling type key pressing, the connection is reliable, and the consistency is high; compared with the equipment used in laser welding, the equipment used in the scheme has low cost; the connecting part of the end plate and the side plate can be repeatedly disassembled and assembled, and the maintainability is high.

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

Claims

1. A battery frame is characterized in that the battery frame comprises two end plates, two side plates and a plurality of molding keys, the molding keys are in a strip-shaped structure,

2. The battery frame as claimed in claim 1, wherein the press key has a wedge-shaped structure, the press key includes a guide portion and a pressing portion,

3. The battery frame of claim 1, wherein the press key is oblong in cross-section.

4. The battery frame according to any one of claims 1 to 3,

the end plate comprises a first side wall facing away from the accommodating space;

5. The battery frame of claim 4, wherein the receiving groove comprises a first groove,

6. The battery frame of claim 5, wherein at least one groove sidewall of the first groove is provided with a second groove,

7. The battery frame according to any one of claims 1 to 3,

the end plate comprises a first side wall, a second side wall and a connecting side wall, the second side wall is positioned between the first side wall and the accommodating space, and the connecting side wall is connected with the first side wall and the second side wall;

8. The battery frame of claim 7,

the extension section comprises a first extension part and a second extension part, the first extension part is connected with the side plate main body through the second extension part, and an included angle between the first extension part and the second extension part is an acute angle, a right angle or an obtuse angle;

9. The battery frame according to any one of claims 1 to 3,

the end plate comprises a second side wall close to the accommodating space;

10. A battery module, characterized in that, the battery module includes a plurality of battery cells and the battery frame of any one of claims 1-9, the plurality of battery cells are disposed in the accommodating space of the battery frame.