CN115411441A

CN115411441A - Battery module

Info

Publication number: CN115411441A
Application number: CN202211353279.2A
Authority: CN
Inventors: 舒云; 张鹏; 杨秋立; 杨慧勇
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2022-11-29
Anticipated expiration: 2042-11-01
Also published as: CN115411441B

Abstract

The invention discloses a battery module, and relates to the technical field of batteries; the battery module comprises an electric core assembly and a shell, wherein the shell is wrapped outside the electric core assembly and comprises two end plates respectively positioned at two ends of the electric core assembly and two side plates respectively positioned at two sides of the electric core assembly; two ends of each side plate are respectively bent to form a wrapping limiting part, the four wrapping limiting parts of the two side plates are arranged in a pairwise opposite mode, and the two opposite wrapping limiting parts form a wrapping limiting cavity together; two end plates are respectively accommodated in the two wrapping limiting cavities, and each wrapping limiting cavity limits the position of the corresponding end plate opposite side plate from at least two directions which are arranged at an included angle. The structure of this battery module accessible curb plate realizes the fixed of end plate, compares in the welding cooperation, and spacing cooperation mode more can improve the detachability of shell to realize maintenance, change and the dismantlement to electric core through the dismouting shell easily when arbitrary electric core damages, can reduce manufacturing and manufacturing cost effectively.

Description

Battery module

Technical Field

The invention relates to the technical field of batteries, in particular to a battery module.

Background

The current battery module generally includes shell and electric core subassembly, and the shell includes two end plates that are located electric core subassembly both ends respectively and two curb plates that are located electric core subassembly both sides respectively, and end plate and curb plate welding form square casing to the holding electric core subassembly. The detachability of the shell of the battery module that sets up like this is low, scraps whole battery module easily when arbitrary electric core damages, has the higher problem of cost.

Disclosure of Invention

The invention aims to provide a battery module with high detachability, which is easy to maintain, replace and disassemble when any battery core is damaged, and can effectively reduce the manufacturing and production cost.

Embodiments of the invention may be implemented as follows:

in a first aspect, the present invention provides a battery module including:

an electrical core assembly;

the shell is wrapped outside the electric core assembly and comprises two end plates respectively positioned at two ends of the electric core assembly and two side plates respectively positioned at two sides of the electric core assembly; two ends of each side plate are respectively bent to form a wrapping limiting part, the four wrapping limiting parts of the two side plates are arranged in a pairwise opposite mode, and the two opposite wrapping limiting parts form a wrapping limiting cavity together; two end plates are respectively accommodated in the two wrapping limiting cavities, and each wrapping limiting cavity limits the position of the corresponding end plate opposite side plate from at least two directions which are arranged at an included angle.

In an alternative embodiment, each package limiting cavity limits the position of the end plate relative to the side plate from at least two of the length direction, the height direction and the width direction of the corresponding end plate.

In an alternative embodiment, each wrapping limiting cavity limits the position of the end plate relative to the side plate from the length direction and the height direction of the corresponding end plate together.

In an optional embodiment, the wrapping limiting part comprises two first plate bodies arranged in parallel and a second plate body vertically connected between the two first plate bodies;

two liang of a set of four first plate bodys of the spacing portion of two parcels in every parcel limit chamber respectively with the ascending both ends butt in the direction of height of end plate to from the position of the relative curb plate of direction of height restriction end plate of end plate, two second plate bodys of the spacing portion of two parcels in every parcel limit chamber respectively with the ascending both ends butt in end plate length direction, with the position of the relative curb plate of the length direction from the end plate.

In an optional embodiment, the wrapping limiting part further comprises a third plate body vertically connected between the two first plate bodies, and the second plate body is vertically connected with the third plate body;

two third plate bodies of two spacing portions of parcel in every parcel spacing chamber and the one side butt of the end plate width direction that corresponds, the electricity core subassembly with the adjacent tip of the end plate that corresponds and the opposite side butt of the width direction of the end plate that corresponds to from the position of the relative curb plate of width direction restriction end plate jointly of end plate.

In an optional embodiment, the battery module further comprises base plates at two ends of the electric core assembly, and the base plates are arranged between the end plates and the electric core assembly and abut against the other side of the corresponding end plates in the width direction.

In an optional embodiment, the electric core assembly includes a plurality of electric cores stacked, a stacking direction of the plurality of electric cores is a width direction of the end plate, a length direction of the electric cores is a length direction of the end plate, and a height direction of the electric cores is a height direction of the end plate.

In an alternative embodiment, the battery module further comprises two locking mechanisms, and the two locking mechanisms are respectively used for locking the positions of the two end plates relative to the side plates.

In an optional embodiment, the end plate is provided with a mounting cavity in a penetrating manner; the part of the wrapping limiting cavity, which wraps the outer side of the end plate, is oppositely provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are positioned at two ends of the mounting cavity and are communicated with the mounting cavity;

locking mechanism includes locking bolt and compresses tightly the piece, locking bolt's head butt sets up the one side that the wall body of first mounting hole deviates from the second mounting hole in the spacing chamber of parcel, first mounting hole is run through in locking bolt's pole portion, second mounting hole and mounting chamber setting, and stretch out from the one side that the second mounting hole deviates from first mounting hole, it is connected with the pole portion that stretches out from the second mounting hole to compress tightly the piece, and the butt sets up the one side that the wall body of second mounting hole deviates from first mounting hole in the spacing chamber of parcel, with the curb plate that compresses tightly end plate and correspond jointly with the head.

In an optional implementation mode, the pressing piece comprises a pressing portion and a locking rod, the pressing portion is pivoted with the rod portion extending out of the second mounting hole through a pivoting shaft, the pressing portion abuts against one side, away from the first mounting hole, of the wall body, provided with the second mounting hole, of the limiting cavity of the wrapping body, one end of the locking rod is connected with the pressing portion, and the other end of the locking rod is buckled on the end plate.

In an optional embodiment, each of the wrapping limiting parts is provided with a first mounting hole and a second mounting hole which are opposite and arranged at an interval, two ends of the end plate are respectively provided with a mounting cavity in a penetrating manner, and the two mounting cavities are respectively communicated with the first mounting hole and the second mounting hole of each of the wrapping limiting parts;

every locking mechanism all includes two locking bolts and two and compresses tightly the piece, and every locking bolt all locks corresponding end plate and curb plate through corresponding first mounting hole, second mounting hole and installation cavity with compressing tightly the piece.

In an optional embodiment, the battery module further includes a harness isolation plate and a bus bar, the harness isolation plate is supported at one end of the arrangement pole of the electric core assembly, and the bus bar is mounted on the harness isolation plate and used for electrically connecting the poles of the plurality of electric cores in the electric core assembly;

the battery module further comprises a pressing rod, the two ends of the pressing rod are detachably matched with the two locking mechanisms respectively, the bus bar is pressed on the wiring harness isolation plate by the pressing rod, and the bus bar is abutted to the pole at the corresponding position.

In an alternative embodiment, the two ends of the pressure lever are provided with buckling parts, and the buckling parts at the two ends are respectively buckled and matched with the two locking mechanisms.

In an optional embodiment, the bus bar comprises two rows of connecting bars, and two sides of each row of connecting bars sink to form a limiting groove; the battery module comprises four pressing rods, the four pressing rods are respectively spliced with four limiting grooves formed by two rows of connecting rows in a one-to-one correspondence mode, and two ends of each pressing rod are fastened with the two locking mechanisms.

In an optional embodiment, the battery module further includes a positive output seat and a negative output seat, the positive output seat and the negative output seat are respectively supported by the two end plates and detachably engaged with the two locking mechanisms, and the positive output seat and the negative output seat are respectively used for supporting the positive output end and the negative output end of the busbar.

In an alternative embodiment, the positive output seat and the negative output seat are provided with buckling grooves, and the buckling grooves of the positive output seat and the negative output seat are respectively in buckling fit with the two locking mechanisms.

In an optional embodiment, the battery module further comprises an FPC member, two ends of the FPC member are detachably engaged with the two locking mechanisms, respectively, and when the FPC member is engaged with the locking mechanisms, the FPC member is electrically engaged with the bus bar.

In an alternative embodiment, two ends of the FPC member are respectively bent to form a fitting portion, the fitting portion has a fitting groove, and the two fitting grooves are respectively in snap fit with the two locking mechanisms.

The embodiment of the invention has at least the following advantages or beneficial effects:

the battery module provided by the embodiment of the invention comprises an electric core assembly and a shell, wherein the shell is wrapped outside the electric core assembly and comprises two end plates respectively positioned at two ends of the electric core assembly and two side plates respectively positioned at two sides of the electric core assembly; two ends of each side plate are respectively bent to form a wrapping limiting part, the four wrapping limiting parts of the two side plates are arranged in a pairwise opposite mode, and the two opposite wrapping limiting parts form a wrapping limiting cavity together; two end plates are respectively accommodated in the two wrapping limiting cavities, and each wrapping limiting cavity limits the position of the corresponding end plate opposite side plate from at least two directions which are arranged at an included angle.

This battery module is through the setting in the spacing chamber of parcel, can follow the position of two at least orientation restriction end plate relative curb plates, also the structure of accessible curb plate realizes the fixed to the end plate, compares in the welding cooperation, and spacing cooperation mode more can improve the detachability of shell to realize the maintenance to electric core, change and the dismantlement through the dismouting shell easily when arbitrary electric core damages, can reduce manufacturing and manufacturing cost effectively.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 3 is a schematic partial structural diagram of a battery module according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial structure of a battery module according to an embodiment of the invention;

fig. 5 is a schematic view of a partial structure of a battery module according to an embodiment of the invention;

fig. 6 is a schematic view illustrating a partial structure of a battery module according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a side plate of a battery module according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating a partial structure of a battery module according to an embodiment of the present invention;

fig. 9 is a schematic partial structural diagram six of a battery module according to an embodiment of the present invention;

fig. 10 is a schematic partial structural diagram seven of a battery module according to an embodiment of the present invention.

Icon: 01-a battery module; 10-a housing; 101-side plate; 1011-a wrapping limit part; 10111-a first plate body; 10112-a second plate; 10113-a third plate; 1012-wrapping a limit cavity; 1014-a first mounting hole; 1015-second mounting hole; 102-an end plate; 1021-a mounting cavity; 1022-a snap-fit hole; 103-a top plate; 20-an electrical core assembly; 201-electric core; 30-a backing plate; 40-a locking mechanism; 401-a locking bolt; 4011-a stem portion; 4012-head; 402-a pressing piece; 4021-a pressing part; 4022-a locking lever; 40222-a fastener; 40221-long rod; 50-a harness isolation plate; 60-a busbar; 601-connecting rows; 602-a limiting groove; 70-FPC part; 701-a mating portion; 7011-mating grooves; 80-a pressure bar; 801-a shaft body; 802-snap-fit; 803-a connecting rod; 91-positive output base; 92-a negative output base; 93-snap groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention 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, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 invention.

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 invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. 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 invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

The current battery module generally includes shell and electric core subassembly, and the shell includes two end plates that are located electric core subassembly both ends respectively and two curb plates that are located electric core subassembly both sides respectively, and end plate and curb plate 101 welding form square casing to the holding electric core subassembly. The shell 10 of the battery module that sets up like this is removable low, discards whole battery module easily when arbitrary electric core damages, has the higher problem of cost.

In view of this, the present embodiment provides a battery module with high detachability, which is easy to maintain, replace and disassemble when any one of the battery cells is damaged, and can effectively reduce the manufacturing and production costs. The structure of the battery module will be described in detail below.

Fig. 1 is a schematic structural diagram of a battery module 01 according to an embodiment of the present invention, fig. 2 is an exploded schematic structural diagram of the battery module 01 according to the embodiment of the present invention, fig. 3 is a schematic partial structural diagram of the battery module 01 according to the embodiment of the present invention, fig. 4 is a schematic partial structural diagram of the battery module 01 according to the embodiment of the present invention, fig. 5 is a schematic partial structural diagram of the battery module 01 according to the embodiment of the present invention, and fig. 6 is a schematic partial structural diagram of the battery module 01 according to the embodiment of the present invention. Referring to fig. 1 to 6, in the present embodiment, a battery module 01 includes a battery cell assembly 20 and an outer case 10. The electric core assembly 20 is stacked in the housing 10, and the housing 10 wraps the outside of the electric core assembly 20.

In detail, the battery cell assembly 20 includes a plurality of battery cells 201 stacked in a thickness direction of the battery cells 201, where the thickness direction is an ab direction in fig. 2, a length direction of the battery cells 201 is a cd direction in fig. 2, and a height direction of the battery cells 201 is an ef direction in fig. 2. The housing 10 includes two end plates 102 respectively located at both ends of the cell assembly 20 in the thickness direction of each cell 201, and two side plates 101 respectively located at both sides of the cell assembly 20 in the length direction of the cell 201. Meanwhile, two ends of each side plate 101 are respectively bent to form a wrapping limiting part 1011, the four wrapping limiting parts 1011 of the two side plates 101 are arranged oppositely, the two opposing wrapping limiting parts 1011 form a wrapping limiting cavity 1012 together (as shown by a dotted line in fig. 6, a simulation line is needed, and the simulation line does not exist actually), and the two wrapping limiting cavities 1012 are arranged at intervals in the thickness direction of the battery cell 201. The two end plates 102 are respectively accommodated in the two wrapping limiting cavities 1012, and each wrapping limiting cavity 1012 limits the position of the corresponding end plate 102 relative to the side plate 101 from at least two directions arranged at an included angle.

Through setting up like this for two end plates 102 can hold respectively in two spacing chambeies 1012 of parcel, thereby make two curb plates 101 and two end plates 102 can enclose into square ring structure jointly, with the security that can protect electric core subassembly 20 circumference. Simultaneously, through the setting of the spacing chamber 1012 of parcel, can follow the position of two at least direction restriction end plate 102 relative curb plate 101, also can realize the fixed to end plate 102 through the structure of curb plate 101, compare in the welding cooperation, spacing cooperation mode more can improve the detachability of shell 10 to realize the maintenance to electric core 201, change and dismantlement through dismouting shell 10 easily when arbitrary electric core 201 damages, can reduce manufacturing and manufacturing cost effectively.

It should be noted that, in this embodiment, the housing 10 is further provided with a top plate 103 as required, and the top plate 103 is disposed on the top of the square ring structure enclosed by the end plate 102 and the side plate 101, so as to protect the circumferential direction of the core assembly 20 together with the side plate 101 and the end plate 102, so as to sufficiently improve the safety of the battery cell 201.

It should be further noted that, in this embodiment, the positive electrode post and the negative electrode post of each battery cell 201 in the battery cell assembly 20 are both disposed toward the top and located on the same side of the battery cell 201, so that the CCS assembly is disposed conveniently, and the CCS assembly is disposed at one end of the battery cell assembly 20. Specifically, the CCS assembly includes a wire harness isolation plate 50, a bus bar 60 and an FPC assembly 70, wherein the wire harness isolation plate 50 is supported at an end of the electric core 201, the top plate 103 is in insertion fit with the wire harness isolation plate 50 for disassembly, the bus bar 60 is supported on the wire harness isolation plate 50 for electrically connecting each electric core 201, and the FPC assembly 70 is electrically connected with the bus bar 60 for detecting and outputting parameter information of the electric core 201. Of course, in other embodiments, the positive electrode post and the negative electrode post of the battery cell 201 may also be disposed on different two surfaces; meanwhile, a high-temperature insulating film may be further disposed on a side of the bus bar 60 away from the harness isolation plate 50 to prevent the connection bars 601 in the bus bar 60 from being connected together to cause an end when the electrolyte in the battery cell 201 is sprayed out, which is not limited in this embodiment.

As an alternative, referring to fig. 1 to 6 again, in the present embodiment, each of the wrapping limiting cavities 1012 limits the position of the end plate 102 relative to the side plate 101 from at least two of the length direction, the height direction and the width direction of the corresponding end plate 102. The length direction of the end plate 102 and the length direction of the battery cell 201 are the same direction, which is also the cd direction in fig. 2, the height direction of the end plate 102 and the height direction of the battery cell 201 are the same direction, which is also the ef direction in fig. 2, and the width direction of the end plate 102 and the thickness direction of the battery cell 201 and the stacking direction of the battery cell 201 are the same direction, which is also the ab direction in fig. 2.

Illustratively, in the present embodiment, each of the wrapping limit cavities 1012 collectively limits the position of the end plate 102 with respect to the side plate 101 from the length direction and the height direction of the corresponding end plate 102. Fig. 7 is a schematic structural diagram of a side plate 101 of a battery module 01 according to an embodiment of the present invention. Referring to fig. 1 to 7, in order to achieve the common limitation of the end plate 102 in the length direction and the height direction, in the present embodiment, the package limiting portion 1011 includes two first plate bodies 10111 arranged in parallel and a second plate body 10112 vertically connected between the two first plate bodies 10111. The first plate body 10111 is the flat-plate-shaped or square flat-plate-shaped of circular arc, and two first plate bodies 10111 are parallel and the interval sets up on the direction of height, and the second plate body 10112 is connected perpendicularly between two first plate bodies 10111, and two second plate bodies 10112 of two relative parcel spacing portions 1011 are parallel and the interval sets up on length direction. Two pairs of four first plate bodies 10111 of the two spacing portions 1011 of parcel of each parcel spacing chamber 1012 are in butt joint with the both ends on the direction of height of end plate 102 respectively to from the position of the relative curb plate 101 of direction of height restriction end plate 102 of end plate 102, two second plate bodies 10112 of the two spacing portions 1011 of parcel of each parcel spacing chamber 1012 are in butt joint with the both ends on the length direction of end plate 102 respectively, in order to follow the position of the relative curb plate 101 of the spacing end plate 102 of length direction of end plate 102.

Through the setting of two first plate bodies 10111 and a second plate body 10112 of the spacing portion 1011 of parcel for a spacing chamber 1012 of parcel includes four first plate bodies 10111 and two second plate bodies 10112, and two liang of same dull and stereotyped faces that are located of four first plate bodies 10111, and two upper end butts with end plate 102, two lower extreme butts with end plate 102, in order to follow the position of the relative curb plate 101 of upper and lower direction restriction end plate 102. Two second plate members 10112 abut against the left end of end plate 102 and the right end of end plate 102, respectively, to regulate the position of end plate 102 relative to side plate 101 in the left-right direction. Through setting up like this for the fixed position of the relative curb plate 101 of end plate 102, and stability is higher, therefore can guarantee the security and the stability of electric core 201 in the battery module 01. Simultaneously, when dismantling the operation, only need with end plate 102 with wrap up spacing chamber 1012 separate can, convenient and fast compares in the welding, detachability is stronger to do benefit to the maintenance and the change of electric core 201.

As an alternative, referring to fig. 6 and 7 again, in the present embodiment, the package limiting portion 1011 further includes a third plate 10113 vertically connected between the two first plates 10111, and the second plate 10112 is vertically connected to the third plate 10113. The third plate 10113, the second plate 10112 and the two first plates 10111 together form a "C" -shaped wrapping limiting portion 1011, which can wrap the end of the end plate 102 in an angle wrapping manner. Two third plates 10113 of the same wrapping limiting cavity 1012 are positioned on the same flat surface. And two third plate bodies 10113 of the two wrapping limiting parts 1011 of each wrapping limiting cavity 1012 are abutted against one side of the width direction of the corresponding end plate 102, and the end part of the electric core assembly 20 adjacent to the corresponding end plate 102 is abutted against the other side of the width direction of the corresponding end plate 102, so as to limit the position of the end plate 102 relative to the side plate 101 from the width direction of the end plate 102.

That is, through the setting of third plate body 10113, can restrict the relative curb plate 101 of end plate 102 position on the width direction with electric core subassembly 20 jointly to make the relative curb plate 101 of end plate 102 position can obtain spacingly in three two liang mutually perpendicular's direction, thereby can fully improve the stability of curb plate 101, more do benefit to the security and the stability of guaranteeing electric core 201. Simultaneously, when dismantling the operation, also only need with end plate 102 with wrap up spacing chamber 1012 separate can, need not to carry out unnecessary operation, therefore also improve the detachability of shell 10 to improve battery module 01's detachability, guarantee the convenience and the reliability of the maintenance of electric core 201 and change operation.

Further optionally, the battery module 01 further includes backing plates 30 at two ends of the core assembly 20, and the backing plates 30 are disposed between the end plates 102 and the core assembly 20 and abut against the other side of the corresponding end plate 102 in the width direction. The backing plate 30 may be a metal plate, a plastic plate, or a plate structure having a cushioning property. The setting through backing plate 30 can reduce the influence and the damage to electric core 201 in installation and the dismantlement process, can protect the security of electric core 201 structure.

Fig. 8 is a schematic partial structural diagram of a battery module 01 according to an embodiment of the present invention; fig. 9 is a schematic partial structural diagram six of the battery module 01 according to the embodiment of the present invention. Referring to fig. 1 to 4, and fig. 8 and 9, in the present embodiment, the battery module 01 further includes two locking mechanisms 40, and the two locking mechanisms 40 are respectively disposed at two ends of the electric core assembly 20 and are used for locking positions of two end plates 102 relative to the side plates 101. Through the setting of locking mechanism 40, can further improve the stability and the reliability of shell 10, simultaneously, through the setting of locking mechanism 40, when dismantling, only need relieve locking mechanism 40 the locking state can, also can guarantee the detachability of battery module 01 to can improve the maintenance and the change efficiency of electric core 201.

In detail, referring to fig. 6 to 8 again, the end plate 102 is provided with a mounting cavity 1021 along the height direction thereof, and the mounting cavity 1021 is a long through-hole cavity. The part of the wrapping limiting cavity 1012 outside the end plate 102 is relatively provided with a first mounting hole 1014 and a second mounting hole 1015, and the first mounting hole 1014 and the second mounting hole 1015 are located at two ends of the mounting cavity 1021 and are communicated with the mounting cavity 1021. Meanwhile, the locking mechanism 40 comprises a locking bolt 401 and a pressing piece 402, a head portion 4012 of the locking bolt 401 abuts against one side, facing away from the second mounting hole 1015, of a wall body, provided with the first mounting hole 1014, of the wrapping limiting cavity 1012, a rod portion 4011 of the locking bolt 401 penetrates through the first mounting hole 1014, the second mounting hole 1015 and the mounting cavity 1021, extends out of one side, facing away from the first mounting hole 1014, of the second mounting hole 1015, the pressing piece 402 is connected with the rod portion 4011 extending out of the second mounting hole 1015, and abuts against one side, facing away from the first mounting hole 1014, of the wall body, provided with the second mounting hole 1015, of the wrapping limiting cavity 1012, so that the end plate 102 and the corresponding side plate 101 are pressed together with the head portion 4012.

Through the setting of locking bolt 401 and compressing tightly piece 402, can lock end plate 102 and curb plate 101 jointly to do benefit to the stability that improves end plate 102 and curb plate 101, with the stability and the security that can improve electric core 201. Simultaneously, when carrying out the dismouting operation, only need pull down locking bolt 401 and compress tightly piece 402, then shift out the terminal plate 102 the spacing chamber 1012 of parcel can, can guarantee dismouting efficiency, do benefit to the change of electric core 201 and the going on of maintenance operation.

In more detail, each wrapping limiting part 1011 is provided with a first mounting hole 1014 and a second mounting hole 1015 which are opposite and arranged at intervals, the first mounting hole 1014 and the second mounting hole 1015 are respectively arranged on the two first plate bodies 10111, and the two mounting holes are opposite. Two ends of the end plate 102 along the length direction are respectively provided with a mounting cavity 1021 extending along the height direction in a penetrating manner, and the two mounting cavities 1021 are respectively communicated with a first mounting hole 1014 and a second mounting hole 1015 of each wrapped limiting part 1011. Correspondingly, each locking mechanism 40 comprises two locking bolts 401 and two pressing pieces 402, and each locking bolt 401 and each pressing piece 402 lock the corresponding end plate 102 and the corresponding side plate 101 through the corresponding first mounting hole 1014, the corresponding second mounting hole 1015 and the corresponding mounting cavity 1021. As shown in fig. 8, the number of the locking bolts 401 is four, the number of the pressing members 402 is also four, the locking bolts 401 respectively pass through a first mounting hole 1014, a mounting cavity 1021 and a second mounting hole 1015, the head portion 4012 of the locking bolt 401 abuts against the outer side of the first plate body 10111 below, the rod portion 4011 of the locking bolt 401 extends out from the first plate body 10111 above, and the pressing members 402 are connected with the extending rod portion 4011 and abut against the first plate body 10111 above, so as to achieve complete locking of the end plate 102 and the side plate 101 in the up-down direction.

Of course, in other embodiments, the first mounting hole 1014 and the second mounting hole 1015 may also be respectively opened on two second boards 10112 wrapping the position-limiting portion 1011. At this time, the mounting cavity 1021 in the end plate 102 is opened through along the length direction thereof. Meanwhile, the head 4012 of the locking bolt 401 and the pressing member 402 abut against the two second plate 10112, which is not further described herein.

Optionally, in this embodiment, the pressing member 402 is substantially "7" shaped, and includes a pressing portion 4021 and a locking rod 4022, the pressing portion 4021 is substantially cylindrical, and is pivotally connected to the rod portion 4011 extending from the second mounting hole 1015 through a pivot shaft, and abuts against a side of the wall body of the wrapping limiting cavity 1012, which faces away from the first mounting hole 1014, and the wall body of the wrapping limiting cavity 1015 opens the second mounting hole 1015. Locking lever 4022 includes stock 40221 and fastener 40222, compresses tightly piece 402 and is that rectangular shaft-like one end is connected with compressing tightly portion 4021, and the other end extends to the direction of keeping away from compressing tightly portion 4021, and fastener 40222 is hook-shaped structure, sets up in the other end that compresses tightly piece 402, and is used for the lock joint in end plate 102, and it has seted up lock joint hole 1022 to open to run through along the thickness direction on end plate 102, and the hook-shaped structure of fastener 40222 of being convenient for stretches into and carries out the lock joint cooperation. Through the arrangement, the locking mechanism 40 can lock the end plate 102 and the side plate 101 more stably, and the bolt is not easy to disengage from the hole, so that the safety and reliability of the battery cell 201 can be improved. Meanwhile, when the disassembly operation is performed, only the fastening piece 40222 is required to be separated from the fastening hole 1022, then the pivot shaft is taken out, and then the locking bolt 401 is taken out.

Referring to fig. 2, fig. 3, fig. 4, fig. 8 and fig. 9 again, in the prior art, the CCS assembly is disposed at an end of the core assembly 20, and the bus bar 60 of the CCS assembly and the terminal of the cell 201 are also laser welded together. The battery module 01 that sets up like this is removable low, need take off whole CCS assembly when arbitrary electric core 201 damages to other electric cores 201 of easy damage, with make whole battery module 01 scrap easily, there is the higher problem of cost. Therefore, in the present embodiment, the battery module 01 further includes a pressing rod 80, two ends of the pressing rod 80 are detachably engaged with the two locking mechanisms 40, respectively, and the pressing rod 80 presses the bus bar 60 onto the wire harness isolation plate 50, so that the bus bar 60 abuts against the corresponding position of the pole.

On one hand, through the arrangement of the pressure lever 80, the bus bar 60 can be compressed, so that the bus bar 60 can be stably matched with the pole of the battery cell 201, thereby avoiding the adoption of a welding mode for electric connection, and when any battery cell 201 is damaged, the battery cell 201 can be taken out without influencing the use of other battery cells 201; on the other hand, depression bar 80 is through dismantling the cooperation with locking mechanism 40 for depression bar 80 detachability improves, when dismantling, only need with depression bar 80 and locking mechanism 40 separation can, also utilize original locking mechanism 40 can realize the quick detach of depression bar 80, can guarantee the detachability of whole battery module 01, with the change and the maintenance efficiency that improve electric core 201.

In detail, fig. 10 is a schematic partial structural diagram seven of the battery module 01 according to the embodiment of the present invention. Referring to fig. 8 to 10 again, in the present embodiment, the pressing rod 80 includes a rod body 801 and fastening portions 802 located at two ends of the rod body 801, the rod body 801 is long and is disposed across the battery cell assembly 20 along the stacking direction of the battery cells 201, and the fastening portions 802 are substantially in a 7-shaped hook structure and are bent and disposed at the end of the rod body 801. The buckling parts 802 at the two ends of the rod body 801 are respectively buckled and matched with the two long rods 40221 of the two locking mechanisms 40. Because the long rod 40221 can be buckled with the end plate 102, the position of the bus bar 60 is fixed relative to the end plate 102 after the buckling part 802 is buckled with the long rod 40221, so that the whole CCS assembly structure is more stable and reliable, and the reliability and stability of the charging and discharging operation of the battery module 01 can be improved. Meanwhile, the original locking mechanism 40 is utilized to lock the pressure lever 80, redundant structures are not wasted, the cost can be saved, the disassembly and assembly are convenient, the replacement and maintenance of the battery cell 201 are convenient, and the cost can be further reduced.

In more detail, in the present embodiment, the bus bar 60 includes two rows of connecting bars 601, each row of connecting bars 601 includes a plurality of connecting bars 601, and the plurality of connecting bars 601 can implement series connection or parallel connection of a plurality of battery cells 201. Meanwhile, both sides of each row of connecting rows 601 along the length direction of the battery cell 201 sink to form a limiting groove 602, that is, both ends of each connecting row 601 in the length direction sink, and the sinking parts of the connecting rows 601 in the same row form a long limiting groove 602. Meanwhile, the battery module 01 includes four pressing rods 80, the four pressing rods 80 are respectively inserted into the four limiting grooves 602 formed by the two rows of connecting rows 601 in a one-to-one correspondence manner, and two ends of each pressing rod 80 are fastened with the long rods 40221 of the two locking mechanisms 40. Through setting up like this for the both sides homoenergetic of every connecting bar 601 obtain a depression bar 80 fixed, make connecting bar 601 stability higher, thereby make whole busbar 60 stability higher, and then make the stability of whole CCS assembly higher, can further improve the stability and the reliability of battery module 01 charge-discharge operation.

In the present embodiment, two pressure levers 80 facing the same bus bar 60 can be connected by a connecting rod 803, and the number of the connecting rods 803 may be one or two, and exemplarily, as shown in fig. 10, the number of the connecting rods 803 is one, and the connecting rods are connected and disposed between the buckling parts 802 of the two pressure levers 80. The connecting rod 803 can improve the stability of the pressure lever 80 and can improve the strength of the pressure lever 80. Of course, in other embodiments, the position and the number of the connecting rods 803 may be adjusted according to the requirement, and this embodiment is not limited.

Alternatively, in the present embodiment, both ends of the FPC member 70 are detachably fitted with the long bars 40221 of the two locking mechanisms 40, respectively, and the FPC member 70 is electrically coupled with the bus bar 60 when the FPC member 70 is fitted with the long bars 40221 of the locking mechanisms 40. Through dismantling the cooperation with FPC spare 70 and stock 40221, the dismouting of FPC spare 70 in the aspect of the ability, and can realize FPC spare 70 and busbar 60's electricity and be connected, need not to weld FPC spare 70 and busbar 60 to not fragile FPC spare 70 when dismantling, can reduce electric core 201 and dismantle the influence to other electric core 201 when maintaining, reduce scrapping of electric core 201, in order to practice thrift manufacturing and manufacturing cost.

In this embodiment, the two ends of the FPC 70 are respectively bent to form a matching portion 701, the matching portion 701 is substantially square, the matching portion 701 has a matching groove 7011, the matching groove 7011 is a rectangular long groove, and the two matching grooves 7011 are respectively snap-fitted with the long rods 40221 of the two locking mechanisms 40. Through the lock joint cooperation, can improve and dismantle efficiency and quality, can guarantee the stability and the reliability of FPC spare 70 again simultaneously. Simultaneously, through setting up like this for the cooperation of the shell 10 of whole battery module 01, CCS subassembly and electric core 201 all do not have the welding cooperation, thereby can alleviate and improve the problem of dismantling other electric cores 201 or the part of damage that bring when the welding cooperation, and then can further reduce manufacturing and manufacturing cost.

It should be further noted that, in other embodiments, the position of the FPC piece 70 detachably engaged with the locking mechanism 40 and the detachable engagement manner may also be adjusted according to requirements, for example, the detachable engagement manner may be selected as an insertion manner, a clamping manner, and the like, and the embodiment is not limited.

Referring to fig. 2, fig. 3, fig. 4, fig. 8, fig. 9 and fig. 10 again, in the present embodiment, after the plurality of connecting bars 601 are electrically connected to each of the battery cells 201, one positive post and one negative post remain, and the remaining one positive post and one negative post are respectively connected to one connecting bar 601 to be used as two output ends of the bus bar 60. The battery module 01 further includes a positive output seat 91 and a negative output seat 92, and the positive output seat 91 and the negative output seat 92 are respectively supported on the two end plates 102 and detachably engaged with the long rods 40221 of the two locking mechanisms 40. The connection row 601 serving as the negative output end is supported by the positive output seat 91, and the connection row 601 serving as the negative output end is supported by the negative output seat 92, so as to be externally connected with other battery modules 01 or externally connected with electric equipment. Can dismantle the cooperation through exporting seat 91 with anodal output seat 92 and negative pole output seat 92 with locking mechanism 40, can not only realize anodal output seat 91 and negative pole output seat 92's firm, can also be convenient for anodal output seat 91 and negative pole output seat 92's dismantlement to can further improve battery module 01's detachability, with the change and the maintenance efficiency that improve electric core 201, with practice thrift manufacturing and manufacturing cost.

In detail, in this embodiment, the lower ends of the positive output base 91 and the negative output base 92 are abutted against the end plate 102, and the positions of the positive output base 91 and the negative output base 92 near the middle part are both provided with a buckling groove 93, and the buckling grooves 93 of the positive output base 91 and the negative output base 92 are respectively buckled and matched with the long rods 40221 of the two locking mechanisms 40. The positions of the long rods 40221 matched with the positive output seat 91 and the negative output seat 92 are not fixed, the positions of the positive output seat 91 and the negative output seat 92 can be correspondingly adjusted along with the change of the serial connection and parallel connection modes of the battery cell 201, and at the moment, the positive output seat 91 and the negative output seat 92 are respectively buckled with the adjacent long rods 40221. For example, referring to fig. 8, in this embodiment, the positive output socket 91 and the negative output socket 92 are respectively buckled and matched with two long rods 40221 spaced in the stacking direction of the battery cell 201. Certainly, in other embodiments, the matching position of the positive output seat 91 and the negative output with the locking mechanism 40 can be adjusted according to requirements, and is not limited to be fastened to the long rod 40221, and is not described herein again.

In order to further improve the stability of the entire battery module 01, in this embodiment, a connecting rod 803 is connected between two pressing rods 80 adjacent to the positive output base 91 and the negative output base 92, and the connecting rod 803 is also in snap-fit engagement with the corresponding snap-fit groove 93 of the positive output base 91 or the negative output base 92. Through setting up like this for whole battery module 01's structure is compacter and reliable, more can improve battery module 01 charge-discharge operation's stability and reliability.

It should be noted that, in the present embodiment, the fastening structure is implemented by fastening the hook-shaped structure and the rod-shaped structure, whether the FPC 70 is detachably fitted to the locking mechanism 40, the compression bar 80 is detachably fitted to the locking mechanism 40, or the positive output socket 91 and the negative output socket 92 are detachably fitted to the locking mechanism 40. However, in other embodiments, the detachable matching mode can also be selected as plugging or clamping, the matching mode of the plugging column and the plugging groove is adopted during plugging, the matching mode of the clamping piece and the clamping groove is adopted during clamping, and the embodiment is not limited.

The following describes in detail the mounting and dismounting process, the working principle and the beneficial effects of the battery module 01 according to the embodiment of the present invention:

when the battery module 01 is installed, the two side plates 101 are oppositely and alternately arranged to form two wrapping limiting cavities 1012, and then the two side plates 101 are respectively accommodated in the two wrapping limiting cavities 1012, so that the position of the end plate 102 relative to the side plates 101 can be limited in the length direction and the height direction by each wrapping limiting cavity 1012; then, the end plate 102 and the side plate 101 are locked by the locking mechanism 40, and are placed into the battery cell 201, and the position of the end plate 102 relative to the side plate 101 is limited in the width direction by the battery cell 201 and the wrapping limit cavity 1012; then, the wire harness isolation plate 50 is supported at the end of the electric core 201, the bus bar 60 is supported at the wire harness isolation plate 50, the pressing plate is pressed tightly, the pressing plate is fastened with the locking mechanism 40, the FPC 70 is also fastened with the locking mechanism 40, the bus bar 60 is electrically connected, the positive output seat 91 and the negative output seat 92 are respectively supported on the two end plates 102 and are respectively fastened with the two locking mechanisms, and finally the top plate 103 is matched with the wire harness isolation plate 50 in an inserting mode.

When any electric core 201 is damaged, the locking mechanism 40 can be unlocked, the pressure lever 80 is separated from the locking mechanism 40 in sequence, the FPC part 70 is separated from the locking mechanism 40, the positive output seat 91 and the negative output seat 92 are separated from the locking mechanism 40, the end plate 102 is taken out from the corresponding wrapping limiting cavity 1012, and finally, the damaged electric core 201 is taken out.

In above-mentioned in-process, on the one hand, through the setting of the spacing chamber 1012 of parcel, can follow the position of the relative curb plate 101 of length direction and direction of height restriction end plate 102, can also restrict the position of the relative curb plate 101 of end plate 102 from the width direction with electric core subassembly 20 cooperation, also in this battery module 01, the structure of accessible curb plate 101 realizes the fixed to end plate 102, compare in welded fit, spacing cooperation mode can more improve the detachability of shell 10, thereby realize the maintenance to electric core 201 through dismouting shell 10 when arbitrary electric core 201 damages easily, change and dismantlement, can reduce manufacturing and manufacturing cost effectively. On the other hand, no matter be the dismouting of shell 10 or the dismouting of CCS assembly is can dismantle the cooperation mode, no welding cooperation to can further improve battery module 01's detachability, when making arbitrary electric core 201 damage, be difficult for influencing other electric core 201, thereby do benefit to the maintenance that improves electric core 201, change and dismantle efficiency and quality, can further reduce manufacturing and manufacturing cost.

In summary, the embodiment of the present invention provides a battery module 01 with high detachability, which is easy to maintain, replace and disassemble when any one of the battery cells 201 is damaged, and can effectively reduce the manufacturing and production costs.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A battery module, comprising:

a battery cell assembly;

the shell is wrapped outside the electric core assembly and comprises two end plates respectively positioned at two ends of the electric core assembly and two side plates respectively positioned at two sides of the electric core assembly; two ends of each side plate are respectively bent to form a wrapping limiting part, the four wrapping limiting parts of the two side plates are arranged oppositely in pairs, and the two opposite wrapping limiting parts jointly form a wrapping limiting cavity; the two end plates are respectively accommodated in the two wrapping limiting cavities, and each wrapping limiting cavity limits the position of the corresponding end plate relative to the side plate from at least two directions which are arranged at an included angle.

2. The battery module according to claim 1, wherein:

and each wrapping limiting cavity limits the position of the end plate relative to the side plate from at least two of the length direction, the height direction and the width direction of the corresponding end plate.

3. The battery module according to claim 2, wherein:

and each wrapping limiting cavity limits the position of the end plate relative to the side plate from the length direction and the height direction of the corresponding end plate together.

4. The battery module according to claim 3, wherein:

the package limiting part comprises two first plate bodies arranged in parallel and a second plate body vertically connected between the two first plate bodies;

every two of parcel spacing chamber four of parcel spacing portion two liang of first plate body a set of respectively with the ascending both ends butt of direction of height of end plate, in order to follow the direction of height restriction of end plate the end plate is relative the position of curb plate, every two of parcel spacing chamber two of parcel spacing portion the second plate body respectively with the ascending both ends butt of end plate length direction, in order to follow the length direction of end plate is spacing the end plate is relative the position of curb plate.

5. The battery module according to claim 4, wherein:

the wrapping limiting part also comprises a third plate body vertically connected between the two first plate bodies, and the second plate body is vertically connected with the third plate body;

every two of the spacing chamber of parcel two of the spacing portion of parcel the third plate body with correspond one side butt of end plate width direction, electricity core subassembly with correspond the adjacent tip of end plate and corresponding the opposite side butt of the width direction of end plate, in order to follow the width direction of end plate restricts jointly the end plate is relative the position of curb plate.

6. The battery module according to claim 5, wherein:

the battery module is still including being located the backing plate at electricity core subassembly both ends, the backing plate set up in the end plate with between the electricity core subassembly, and with correspond the opposite side butt of the width direction of end plate.

7. The battery module according to claim 2, wherein:

the electric core assembly comprises a plurality of electric cores which are stacked, the stacking direction of the electric cores is the width direction of the end plate, the length direction of the electric cores is the length direction of the end plate, and the height direction of the electric cores is the height direction of the end plate.

8. The battery module according to any one of claims 1 to 7, wherein:

the battery module further comprises two locking mechanisms, and the two locking mechanisms are respectively used for locking the positions of the two end plates relative to the side plates.

9. The battery module according to claim 8, wherein:

the end plate is provided with a mounting cavity in a penetrating way; the part of the wrapping limiting cavity, which wraps the outer side of the end plate, is oppositely provided with a first mounting hole and a second mounting hole, and the first mounting hole and the second mounting hole are positioned at two ends of the mounting cavity and are communicated with the mounting cavity;

locking mechanism includes locking bolt and compresses tightly the piece, locking bolt's head butt in the spacing chamber of parcel is seted up the wall body of first mounting hole deviates from one side of second mounting hole, locking bolt's pole portion runs through first mounting hole the second mounting hole with the mounting cavity sets up, and follow the second mounting hole deviates from one side of first mounting hole stretches out, compress tightly the piece with follow the second mounting hole stretches out the pole portion is connected, and the butt in the spacing chamber of parcel is seted up the wall body of second mounting hole deviates from one side of first mounting hole, with the head compresses tightly jointly the end plate with correspond the curb plate.

10. The battery module according to claim 9, wherein:

the pressing part comprises a pressing part and a locking rod, the pressing part is pivoted with the rod part extending out of the second mounting hole through a pivoting shaft, the pressing part is abutted against one side of the first mounting hole, the wall body of the second mounting hole is formed in the wrapping limiting cavity, one end of the locking rod is connected with the pressing part, and the other end of the locking rod is buckled on the end plate.

11. The battery module according to claim 9, wherein:

each wrapping limiting part is provided with a first mounting hole and a second mounting hole which are opposite and arranged at intervals, two ends of each end plate are respectively provided with a mounting cavity in a penetrating mode, and the two mounting cavities are respectively communicated with the first mounting hole and the second mounting hole of each wrapping limiting part;

every locking mechanism all includes two locking bolts and two and compresses tightly the piece, every locking bolt with it all through corresponding to compress tightly the piece the first mounting hole, the second mounting hole and the installation cavity locking is corresponding the end plate with the curb plate.

12. The battery module according to claim 8, wherein:

the battery module further comprises a wiring harness isolation plate and a bus bar, wherein the wiring harness isolation plate is supported at one end of the arranged pole of the electric core assembly and exposes the poles of the plurality of electric cores of the electric core assembly, and the bus bar is mounted on the wiring harness isolation plate and used for electrically connecting the poles of the plurality of electric cores in the electric core assembly;

the battery module still includes the depression bar, the both ends of depression bar respectively with two locking mechanism can dismantle the cooperation, the depression bar will the busbar is pressed and is located the pencil division board, and makes the busbar with correspond the position utmost point post butt.

13. The battery module according to claim 12, wherein:

the two ends of the pressure lever are provided with buckling parts, and the buckling parts at the two ends are respectively buckled and matched with the two locking mechanisms.

14. The battery module according to claim 13, wherein:

the bus bar comprises two rows of connecting bars, and two sides of each row of connecting bars sink to form limiting grooves; the battery module comprises four pressure bars, the four pressure bars are respectively spliced with four limiting grooves formed by the two rows of connecting rows in a one-to-one correspondence mode, and two ends of each pressure bar are buckled with the two locking mechanisms.

15. The battery module according to claim 12, wherein:

the battery module still includes anodal output seat and negative pole output seat, anodal output seat with negative pole output seat supports respectively in two the end plate, and with two locking mechanism can dismantle the cooperation, just anodal output seat and negative pole output seat are used for supporting respectively the positive negative pole output of busbar.

16. The battery module according to claim 15, wherein:

the positive output seat and the negative output seat are provided with buckling grooves, and the buckling grooves of the positive output seat and the negative output seat are respectively matched with the two locking mechanisms in a buckling manner.

17. The battery module according to claim 12, wherein:

the battery module further comprises an FPC (flexible printed circuit) part, wherein the two ends of the FPC part are detachably matched with the two locking mechanisms respectively, and when the FPC part is matched with the locking mechanisms, the FPC part is electrically connected with the bus bar in a matched mode.

18. The battery module according to claim 17, wherein:

the two ends of the FPC part are respectively bent to form matching parts, the matching parts are provided with matching grooves, and the two matching grooves are respectively matched with the two locking mechanisms in a fastening mode.