CN214099754U

CN214099754U - Battery module and battery PACK

Info

Publication number: CN214099754U
Application number: CN202120140300.5U
Authority: CN
Inventors: 殷铁映; 贺毅; 王�义; 陈育伟; 胡松涛
Original assignee: Henan Liwei New Energy Technology Co ltd
Current assignee: Henan Liwei New Energy Technology Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-08-31
Anticipated expiration: 2031-01-19

Abstract

The utility model provides a battery module and battery PACK, battery module includes: the shell is provided with peripheral side walls and a bottom wall; the battery cores are arranged in the shell; the heating film is arranged in the shell, is in contact with the battery cell and is used for heating the battery cell, and is provided with a connecting end for connecting a heating wire; the heating wire is connected with the connecting end; wherein, the bottom of casing is equipped with the perforation that supplies the link or supply the heating wire to pass, is equipped with the trough that is used for arranging the heating wire on the bottom surface of casing. The utility model discloses a battery module when the assembly, directly with electric core place in the casing can, need not to use other crowded tight frock and plastic equipment, not only made things convenient for the assembly, improved assembly efficiency, reduced equipment cost moreover. Meanwhile, the bottom wiring of the heating wire is realized, so that the disorder of the wire harness at the top of the battery core can be avoided, the appearance is attractive, and the layout design and the fixation of other wire harnesses at the top of the battery core are facilitated.

Description

Battery module and battery PACK

Technical Field

The utility model relates to a battery technology field, concretely relates to battery module and battery PACK.

Background

Battery PACK usually includes the box and installs a plurality of battery modules in the box, for example, the chinese utility model patent that the publication number is CN211957847U discloses a battery module is with heating membrane, battery module, group battery and device, wherein the group battery (be battery PACK) includes the battery box of compriseing upper cover and lower cover and sets up a plurality of battery modules (be battery module) in the battery box, the battery module includes a plurality of electric cores and sets up the end plate at electric core both ends, the end plate is with electric core centre gripping back, realize fixedly through the ribbon. In addition, the battery module still includes the laminating and is being connected at the outside heating film of electricity core, and the heating film needs to be connected with Battery Management System (BMS) through heating wire usually to realize the ohmic heating of heating film and the collection of information in the heating process.

The heating wire of present heating film all adopts the top to walk the line, also the heating wire arranges the top at electric core promptly, and still can set up the collection line that is used for gathering information such as electric core terminal voltage, temperature, charge-discharge current in the battery module usually, and the collection line switches on with positive negative post, also is located the top of electric core, and the top of electric core will be covered with the pencil like this, and the pencil is more mixed and disorderly, not only influences pleasing to the eye, has also proposed higher requirement to the overall arrangement design and the fixed of pencil moreover. In addition, the current form that sets up of electric core needs to utilize the end plate at both ends to compress tightly and fixed through the ribbon, and assembly operation is more troublesome, and is inefficient, needs dedicated crowded tight frock and plastic equipment moreover, and equipment cost is great.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery module which is convenient to assemble and can avoid messy wiring harnesses at the top of an electric core; an object of the utility model is also to provide a battery module conveniently assembles, and can avoid electric core top pencil mixed and disorderly battery PACK.

In order to achieve the above object, the utility model provides a battery module adopts following technical scheme:

a battery module, comprising:

the shell is provided with peripheral side walls and a bottom wall;

the battery cores are arranged in the shell;

the heating film is arranged in the shell, is in contact with the battery cell and is used for heating the battery cell, and is provided with a connecting end for connecting a heating wire;

the heating wire is connected with the connecting end;

wherein, the bottom of casing is provided with the perforation that supplies the link or supply the heating wire to pass, is provided with the trough that is used for arranging the heating wire on the bottom surface of casing.

The beneficial effects of the above technical scheme are that: at first, the casing of battery module has lateral wall and diapire all around, during the assembly battery module, directly with electric core place in the casing can, need not to use other crowded tight frock and plastic equipment, not only made things convenient for the assembly, improved assembly efficiency, reduced equipment cost moreover. Secondly, the bottom of casing is provided with the perforation that supplies the link or supply the heating wire to pass to be provided with the trough that is used for arranging the heating wire on the bottom surface of casing, just so realized the bottom of heating wire and walked the line, consequently can avoid electric core top pencil in a jumble, not only more pleasing to the eye, made things convenient for the overall arrangement design and the fixed of other pencil in electric core top in addition.

Further, in order to simplify the structure setting on the basis of satisfying the heating demand, make the overall arrangement more reasonable, the casing is the rectangle casing, electric core is equipped with two, is first electric core and the second of being listed as electric core respectively, and two electric cores are arranged side by side in the casing along the length direction of casing, and each is listed as all including at least two electric cores of arranging along the width direction of casing, the heating film is including first heating film and the second heating film that is located casing length direction both ends, and first heating film contacts with each side of first electric core of being listed as, and each side contact of second heating film and second of being listed as electric core.

Further, in order to guarantee insulating properties, make things convenient for the arrangement of heating film simultaneously, the battery module still includes the lateral part insulation board that sets up the lateral wall inboard all around of casing and sets up the bottom insulation board on the diapire, and first heating film and second heating film are pasted respectively and are fixed on two lateral part insulation boards of relative arrangement.

Further, in order to guarantee the insulating property, the battery module further comprises a side insulating plate arranged on the inner side of the peripheral side wall of the shell and a bottom insulating plate arranged on the bottom wall.

Furthermore, in order to ensure that the heating wire is firm and reliable, a ribbon used for fixing the heating wire is arranged in the wiring groove.

Furthermore, in order to facilitate the formation of the wiring groove, two parallel protrusions are fixed on the bottom surface of the shell, and the wiring groove is defined by the two protrusions and the bottom surface of the shell.

Furthermore, in order to facilitate the processing and manufacturing of the protrusion and the connection of the protrusion and the shell, the protrusion is formed by a U-shaped plate, the opening of the U-shaped plate is fixed towards the bottom surface of the shell, and a connection flange which is turned outwards and is used for being fixedly connected with the bottom surface of the shell is arranged on the U-shaped plate.

Furthermore, in order to reduce weight, two side walls which are oppositely arranged in the peripheral side walls of the shell are provided with weight reducing holes.

Further, in order to realize that electric core fixes in the casing in, simplify the structure of battery module, the top of casing is uncovered to make the open setting in top of electric core, the lateral wall top of casing is provided with the connection limit of outside extension, the battery module still include with connect limit fixed connection in order to compress tightly the layering of fixing in the casing with electric core.

In order to achieve the above object, the utility model provides a battery PACK adopts following technical scheme:

battery PACK, including battery box and a plurality of battery module of setting in battery box, battery module includes:

the shell is provided with peripheral side walls and a bottom wall;

the battery cores are arranged in the shell;

the heating wire is connected with the connecting end;

Drawings

FIG. 1 is an overall outline view of a battery PACK of the present invention;

FIG. 2 is a top view of the battery PACK of the present invention with the cover removed;

FIG. 3 is an exploded view of the battery PACK of the present invention after the cover of the battery case is removed;

fig. 4 is a perspective view of a viewing angle of a battery box of the battery PACK of the present invention;

fig. 5 is a perspective view of another view angle of the battery case of the battery PACK of the present invention;

fig. 6 is a top view of a battery box of the battery PACK of the present invention;

fig. 7 is a perspective view of a viewing angle of a battery module of the battery PACK of the present invention;

fig. 8 is a perspective view of another view angle of the battery module of the battery PACK according to the present invention;

fig. 9 is an exploded view of a battery module of the battery PACK of the present invention;

fig. 10 is a structural diagram of a battery control system of the middle battery PACK of the present invention.

In the figure: 1-battery box cover; 2-a battery case; 201-a first side wall; 202-a second sidewall; 203-a third side wall; 204-a fourth sidewall; 205-bottom wall of the box; 206-a first side beam; 207-a second side beam; 208-side stringers; 209-middle stringer; 210-a first support column; 211-a second support column; 212-intermediate support beam; 213-two side support beams; 214-positive terminal box; 215-negative terminal box; 216 — a communication interface; 217-a pressure relief valve; 3-sealing strips; 4-a battery module; 41-a housing; 411-short sidewalls; 412-long side walls; 413-housing bottom wall; 414-U-shaped plate; 415-a wiring trough; 416-a connecting edge; 417-perforation; 418-lightening holes; 42-electric core; 43-pressing strips; 44-a first heating film; 441-a first connection end; 442-a first heating wire; 45-a second heating film; 451-a second connection end; 452-a second heating wire; 46-side insulation plates; 47-four parallel conductive strips; 48-four parallel and four serial conductive strips; 49-a binding tape; 5-a battery control system; 51-a mounting plate; 511-fixing the folded edge; 52-BMS; 53-insulating columns; 54-a fuse; 55-charge and discharge relay; 56-latching relay; 57-heating relay; 58-hall sensor; 6-collecting line; 71-positive copper bar; 72-negative copper bar; 73-connecting copper bars.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses an embodiment of well battery PACK is shown in fig. 1, including battery box 2 and with battery box 2 fixed connection's battery case lid 1, as shown in fig. 3, for guaranteeing the leakproofness, press from both sides between battery box 2 and battery case lid 1 and establish and be fixed with sealing strip 3. As shown in fig. 2 and 3, the battery PACK further includes two battery modules 4 mounted in the battery case 2, and a battery control system 5 disposed in the battery case 2 and connected to the battery modules 4.

The structure of the battery module is as shown in fig. 7, 8 and 9, and includes a casing 41 and a plurality of battery cells 42 disposed in the casing 41, where the casing 41 is a rectangular casing having a peripheral side wall and a casing bottom wall 413, the peripheral side wall includes two oppositely disposed long side walls 412 and two oppositely disposed short side walls 411, the two short side walls 411 are respectively provided with lightening holes 418, and the lightening holes 418 are rectangular holes.

As shown in fig. 8 and 9, the battery cells 42 are provided with two columns, namely a first column and a second column, which are arranged side by side in the length direction of the casing 41 in the casing 41, and each column includes four battery cells 42 arranged in the width direction of the casing 41. The battery module further comprises two four parallel bus bars 47 and four parallel and four serial bus bars 48, wherein the four parallel bus bars 47 realize parallel connection of one row of four battery cells, the four parallel and four serial bus bars 48 simultaneously realize parallel connection of one row of four battery cells and serial connection of another row of four battery cells, namely, the first row of battery cells and the second row of battery cells are respectively connected in series and then connected in parallel.

Because the top of casing 41 is uncovered for the open setting in top of electric core 42, the lateral wall top all around of casing 41 is provided with outside extension's connection limit 416 respectively, and the battery module still includes and is connected limit 416 fixed connection in order to compress tightly the layering 43 of fixing in casing 41 with electric core 42, and layering 43 is for adopting the plastic-impregnated layering that soaks of plastic-process shaping, and insulating properties and elasticity are all relatively good. The number of the pressing strips 43 in one battery module is two, and the two pressing strips are respectively pressed on two rows of battery cores.

As shown in fig. 9, a heating film in contact with the battery cell 42 is disposed in the casing 41, and the heating film is used for heating the battery cell 42, specifically, the heating film includes a first heating film 44 and a second heating film 45 located at two ends of the casing 41 in the length direction, the first heating film 44 is in contact with each side of the first row of battery cells, and the second heating film 45 is in contact with each side of the second row of battery cells. Referring to fig. 7 to 9, the first heating film 44 has a first connection end 441 connected to the first heating wire 442, the second heating film 45 has a second connection end 451 connected to the second heating wire 452, the first connection end 441 and the second connection end 451 are both disposed downward, the bottom of the housing 41 is provided with a through hole 417 through which the first connection end 441 and the second connection end 451 respectively pass, and the through hole 417 is disposed at a junction of the short sidewall 411 and the housing bottom wall 413.

As shown in fig. 7, two parallel protrusions are fixed on the bottom surface of the housing 41, the protrusions are formed by U-shaped plates 414, the openings of the U-shaped plates 414 are fixed toward the bottom surface of the housing 41, and the U-shaped plates 414 are provided with connecting flanges (not labeled in the figure) which are turned outwards and are used for being fixedly connected with the bottom surface of the housing 41. The two U-shaped plates 414 and the bottom surface of the housing 41 together define a wiring slot 415, the wiring slot 415 is used for arranging a second heating wire 452, and in order to ensure that the heating wires are firm and reliable, a binding tape 49 for fixing the second heating wire 452 is arranged in the wiring slot 415.

In addition, in order to ensure the insulation performance, as shown in fig. 9, the battery module further includes side insulation plates 46 disposed inside the peripheral side walls of the case 41 and bottom insulation plates (not shown) disposed on the bottom wall 413 of the case, that is, four side insulation plates 46 and one bottom insulation plate may be made of a resin plate. In order to facilitate the arrangement of the heating films, the first heating film 44 and the second heating film 45 are respectively adhesively fixed to two side insulating plates 46 which are arranged to face each other.

Above be the structure of battery module, during the assembly battery module, directly place electric core 42 in casing 41 can, need not to use other crowded tight frock and plastic equipment, not only made things convenient for the assembly, improved assembly efficiency, reduced equipment cost moreover. In addition, the connecting ends of the two heating films are arranged downwards, the bottom of the shell is provided with a through hole, and the bottom surface of the shell is provided with a wiring groove, so that wiring at the bottom of the heating wire is realized, wiring harnesses at the top of the battery cell are prevented from being disordered, the appearance is attractive, and the layout design and the fixation of other wiring harnesses at the top of the battery cell are facilitated.

The battery case 2 has a structure as shown in fig. 4, 5 and 6, and the battery case 2 has a peripheral side wall and a case bottom wall 205, and the peripheral side wall includes a first side wall 201 and a second side wall 202 which are parallel to each other, and a third side wall 203 and a fourth side wall 204 which are parallel to each other. A fixed frame is arranged in the battery box body 2 and comprises two parallel side cross beams and two parallel side longitudinal beams 208, and the side cross beams and the side longitudinal beams 208 are connected end to end. Two side longitudinal beams 208 are respectively fixed on the third side wall 203 and the fourth side wall 204 of the battery box, and one of the two side cross beams is fixed on the first side wall 201 of the battery box to form a first side cross beam 206. Another side cross beam is close to the second side wall 202 of the battery box body, and is a second side cross beam 207, a set space is provided between the vertical surface where the side cross beam is located and the second side wall 202 of the battery box body, and the battery control system 5 is arranged in the space.

The fixed frame also comprises a middle longitudinal beam 209 fixed between the two side cross beams, so that the whole fixed frame is in a shape like a Chinese character 'ri', two frame openings are formed, each frame opening is respectively used for the battery module 4 to pass through and put into the battery box body 2 from top to bottom, after the battery module 4 is put into, the fixed frame can limit the movement of the battery module 4 all around, and the connecting edge 416 of the battery module 4 is positioned above the fixed frame and fixedly connected with the fixed frame, thereby realizing the fixation of the battery module 4 and ensuring the firm installation of the battery module 4.

Specifically, as shown in fig. 7 to 9 and fig. 4 to 6, two connecting edges in the length direction of the battery module 4 are respectively and fixedly connected to the first side cross beam 206 and the second side cross beam 207, two connecting edges in the width direction of the battery module 4 are respectively and fixedly connected to the side longitudinal beam 208 and the middle longitudinal beam 209, and the adjacent connecting edges of the two battery modules 4 are fixed to the middle longitudinal beam 209.

Nuts are fixed on each beam of the fixing frame, and the connecting edge of the battery module 4 and the first side beam 206 are directly fixed by bolts, so that the casing 41 and the battery box 2 are fixed. After the two connecting edges in the width direction of the battery module 4 are lapped on the side longitudinal beam 208 and the middle longitudinal beam 209, the connecting edges and the pressing strip 43 are simultaneously and fixedly connected, namely, one connecting edge in the width direction, one end of the pressing strip 43 and the side longitudinal beam 208 are simultaneously and fixedly connected through the bolt, and the other connecting edge in the width direction, the other end of the pressing strip 43 and the middle longitudinal beam 209 are also simultaneously and fixedly connected through the bolt, so that the bolt mounting holes which vertically correspond to each other are respectively arranged on the connecting edges and the middle longitudinal beam. Therefore, the arrangement of holes can be reduced, the structure is simplified, the processing is convenient, the connection operation is simplified, and the fixing of the shell 41 and the fixing of the battery cell 42 are realized.

As shown in fig. 10, the battery control system 5 includes the mounting plate 51, the top of the mounting plate 51 has a fixed folding edge 511, the fixed folding edge 511 is fixedly connected with the second side beam 207, specifically, after the connection edge of the battery module 4 is lapped on the second side beam 207, the fixed folding edge 511 of the mounting plate 51 is lapped on the connection edge of the battery module 4, and the three are simultaneously connected by bolts, so that the connection edges of the second side beam 207, the fixed folding edge 511 and the housing 41 are provided with bolt mounting holes corresponding to each other up and down, and the effect is as described above.

Since the fixing frame bears the weight of two battery modules, in order to ensure the fixing frame to be stably supported, as shown in fig. 4 and 5, a first support upright 210 is fixed between the first side cross beam 206 and the bottom wall 205 of the battery box, and a second support upright 211 is fixed between the second side cross beam 207 and the bottom wall 205 of the battery box, since the second side cross beam 207 is also fixed with the mounting plate 51 of the battery control system, the number of the second support upright 211 is greater than that of the first support upright 210. Specifically, there are two first support columns 210 and four second support columns 211.

In addition, since the bottom of the battery module 4 is provided with a protrusion, in order to support the battery module 4, three support beams for supporting the bottom surface of the housing 41 in contact are fixed on the bottom wall 205 of the battery case, as shown in fig. 4 and 5, the support beams are arranged in parallel and extend in the longitudinal direction, and include a middle support beam 212 and two side support beams 213, the width of the middle support beam 212 is greater than the width of the two side support beams 213, and the middle support beam 212 supports two battery modules 4 at the same time. As shown in connection with fig. 7, the two U-shaped plates 414 at the bottom of the housing 41 are spaced from the bottom ends of the long side walls 412 by a distance that is just sufficient for the housing 41 to rest on the middle support beam 212 and the two side support beams 213.

As shown in fig. 10, the battery control system 5 further includes a BMS52 fixed to the mounting plate 51, two insulating posts 53 between which the fuse 54 is mounted, a charge and discharge relay 55, a latching relay 56, a heating relay 57, and a hall sensor 58. As shown in fig. 1, the second side wall 202 of the battery case 2 is provided with a positive terminal box 214, a negative terminal box 215, a communication interface 216, and a relief valve 217. As shown in fig. 2, one of the two battery modules 4 is connected with a positive copper bar 71, the fuse 54, the charge and discharge relay 55 and the positive terminal box 214 are sequentially connected, wherein the charge and discharge relay 55 is a charge and discharge integrated relay for controlling the charge and discharge of the battery module, and the charge and discharge relay 55 is additionally connected with the BMS52 through a collection line. Be connected with negative pole copper bar 72 on the other battery module of two battery modules 4, negative pole copper bar 72 passes behind hall sensor 58 and is connected with negative pole terminal box 215, and wherein hall sensor 58 is used for gathering and overflows, and hall sensor 58 is connected with BMS52 through gathering the line in addition.

As shown in fig. 2, two battery modules 4 are connected in series through the connecting copper bar 73, and the connecting copper bar 73 is bridged between four conductive bars 47 of the two battery modules 4, so as to be integrated into one battery module: four electric cores are parallelly connected, establish ties with four electric cores that connect in parallel in addition again, constitute a battery module, establish ties again between two battery modules, realize low-voltage, high power, heavy current output.

In addition, the heating lead wire arranged in the battery module consists of two wires, namely a positive wire and a negative wire, the positive wire is connected with the heating relay 57 and used for controlling the on-off of heating, and the heating relay 57 is connected with the BMS through an acquisition wire; the negative line passes through the hall sensor 58 for collecting overcurrent, and the hall sensor 58 is additionally connected to the BMS through a collecting line. The latching relay 56 is connected to an external control switch through a communication interface 216 for controlling the temporary sleep of the BMS. In addition, as shown in fig. 2, each of the four parallel conductive strips 47 and the four parallel and four serial conductive strips 48 is connected to a collection line 6, and the collection line 6 is connected to the BMS and used for collecting information such as terminal voltage of the battery cell.

In other embodiments of the battery PACK, the battery module may not be provided with a pressing bar, but an upper cover is fixedly connected to the housing, so as to fix the battery cell.

In other embodiments of the battery PACK, the lightening holes on the housing of the battery module may be provided on both long side walls, or the housing may not be provided with lightening holes.

In other embodiments of the battery PACK, the protrusions on the bottom of the housing of the battery module may also be rectangular tubes or solid steel materials, and are fixed on the bottom surface of the housing by welding.

In other embodiments of the battery PACK, the protrusion may not be fixed on the bottom surface of the housing, and a wiring groove may be directly formed on the bottom surface of the housing under the condition that the wall thickness of the bottom wall of the housing is sufficient.

In other embodiments of the battery PACK, no tie may be disposed in the cabling channel.

In other embodiments of battery PACK, the battery module may not include a side insulating plate and a bottom insulating plate, and the heating film may be directly adhered to the inner wall of the case or the side wall of the battery cell.

In other embodiments of the battery PACK, heating films may be disposed around the battery cells, or between two battery cells.

In other embodiments of the battery PACK, the housing may also be a square housing, i.e. the length of the peripheral side walls of the housing is equal compared to the above embodiments.

In other embodiments of the battery PACK, the through-hole provided in the bottom of the case may also be through which the heating wire passes without the connection end of the heating film passing through.

The embodiment of the middle battery module of the utility model is that: the specific structure of the battery module is the same as that of the battery module in the battery PACK embodiment, and will not be repeated here.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. Battery module, its characterized in that includes:

the shell is provided with peripheral side walls and a bottom wall;

the battery cores are arranged in the shell;

the heating wire is connected with the connecting end;

2. The battery module of claim 1, wherein the housing is a rectangular housing, the cells are provided in two rows, each row includes a first row of cells and a second row of cells, the two rows of cells are arranged side by side in the housing along a length direction of the housing, each row includes at least two cells arranged along a width direction of the housing, the heating films include a first heating film and a second heating film at two ends of the housing along the length direction, the first heating film contacts with each side of the first row of cells, and the second heating film contacts with each side of the second row of cells.

3. The battery module according to claim 2, wherein the battery module further comprises side insulating plates disposed inside the peripheral side walls of the case and a bottom insulating plate disposed on the bottom wall, and the first heating film and the second heating film are respectively adhesively fixed to the two side insulating plates disposed opposite to each other.

4. The battery module according to claim 1, wherein the battery module further comprises side insulating plates disposed inside the peripheral side walls of the case and a bottom insulating plate disposed on the bottom wall.

5. The battery module according to any one of claims 1 to 4, wherein a binding tape for fixing the heating wire is arranged in the wiring groove.

6. The battery module according to any one of claims 1 to 4, wherein two parallel protrusions are fixed on the bottom surface of the housing, and the wiring groove is defined by the two protrusions and the bottom surface of the housing.

7. The battery module according to claim 6, wherein the protrusion is formed of a U-shaped plate, an opening of the U-shaped plate is fixed toward the bottom surface of the housing, and the U-shaped plate is provided with a connection flange which is turned outward and is fixedly connected with the bottom surface of the housing.

8. The battery module according to any one of claims 1 to 4, wherein lightening holes are provided on two of the peripheral side walls of the case that are disposed opposite to each other.

9. The battery module according to any one of claims 1 to 4, wherein the top of the casing is open, so that the top of the battery cell is open, the top of the sidewall of the casing is provided with a connecting edge extending outwards, and the battery module further comprises a pressing strip fixedly connected with the connecting edge for pressing and fixing the battery cell in the casing.

10. Battery PACK, including battery box and set up a plurality of battery module in battery box, its characterized in that, battery module is the same with any one in claim 1~9 battery module.