CN217823038U - Battery module and electronic device - Google Patents

Abstract

The utility model relates to a battery technology field especially relates to a battery module and electron device. The battery module comprises a frame, battery cells, a limiting part and a tab connecting piece, wherein the battery cells are stacked in the frame in parallel; the plurality of limiting parts are arranged in the frame, so that the plurality of battery cells are divided into a plurality of battery cell sets; the corresponding position of locating part is equipped with utmost point ear connecting piece, but utmost point ear connecting piece elastic rotation locates on the frame, and the front end of the utmost point ear of a plurality of electricity core is around on utmost point ear connecting piece to can be along with utmost point ear connecting piece's rotation automatic adjustment utmost point ear around the length on utmost point ear connecting piece, with the inflation of adaptation electricity core, can avoid dragging the damage utmost point ear, can avoid utmost point ear and frame electricity to be connected again, improve battery module's stability. The electronic device enables the battery module to be more stable by applying the battery module, and the safety of the electronic device is improved.

Description

Battery module and electronic device

Technical Field

The utility model relates to a battery technology field especially relates to a battery module and electron device.

Background

As the core of three key technologies of new energy automobiles, power batteries are receiving more and more attention. The expansion of the module cell is one of the problems to be solved. The battery core expansion can be generated when the battery is out of control due to heat or is aged, the battery core can expand even in the normal charging and discharging process, and the expansion of the battery core can cause other structures inside the power battery to deform.

As one of the solutions to the safety problem, the proposal of the all-solid-state battery greatly reduces the risk of thermal runaway and the like of the liquid-containing cell. But the electricity core of all solid-state battery module still can produce the inflation in electrochemical reaction process, and because the volume increase that the electricity core inflation produced and the extrusion force that the inflation electricity core caused to around all can't be neglected, and deformation displacement and the thrust that inside all electricity core inflation produced all will transmit and accumulate to the electricity core department in the outside, can exert very big thrust to the module curb plate from this electricity core in the outside finally. In order to reduce the thrust of electric core inflation to the module curb plate, set up the rigidity locating part usually between electric core to avoid electric core expansive force whole stacks to the module curb plate on.

However, the thickness of the limiting part is large, and the battery cells on the two sides of the limiting part are easily pulled at the connection position of the tabs of the battery cells due to expansion of the battery cells; in addition, because locating part and the expanded reason of electricity core, the length of electric core utmost point ear is longer and be difficult to accurate control, if the length of electric core utmost point ear is shorter than required connection length, then cause utmost point ear junction to drag the power too big easily, and if the length of electric core utmost point ear is far more than required connection length, then utmost point ear easily with the frame contact of battery module, influence electric core stability.

Therefore, a battery module is required to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module can solve the great time of electric core interval, the problem that electric core utmost point ear junction exists.

Another object of the present invention is to provide an electronic device, which comprises a battery module, a battery cover, and a battery cover.

In order to realize the purpose, the following technical scheme is provided:

in a first aspect, a battery module is provided, including:

a frame;

a plurality of cells stacked in parallel within the frame;

the limiting parts are arranged in the frame, so that the battery cells are divided into a plurality of battery cell sets;

utmost point ear connecting piece, the corresponding position of locating part is equipped with utmost point ear connecting piece, but utmost point ear connecting piece elastic rotation is located on the frame, a plurality the front end of the utmost point ear of electricity core centers on the utmost point ear connecting piece, and can along with utmost point ear connecting piece's rotation automatic adjustment utmost point ear centers on length on the utmost point ear connecting piece.

As an alternative of the battery module, the frame comprises a bottom plate and an upper cover, the bottom plate and the upper cover are both provided with a rotating groove, and two ends of the tab connecting piece are respectively in elastic rotation fit with the rotating groove on the bottom plate and the rotating groove on the upper cover.

As an alternative scheme of the battery module, the tab connection piece comprises a winding portion and a rotating portion, the winding portion is used for winding and fixing tabs of the battery cell, an elastic piece extending along the circumferential direction of the rotating portion is arranged in the rotating groove, two ends of the rotating portion are in running fit with the groove wall of the rotating groove, the side wall of the rotating portion is abutted to the elastic piece, and the elastic piece is in a compression state all the time.

As an alternative of the battery module, an arc-shaped receiving groove is formed in the rotary groove, a first end of the elastic member is disposed in the arc-shaped receiving groove, and a second end of the elastic member abuts against the rotary portion.

As an alternative of the battery module, the rotating portion includes a shaft portion and a rotating abutting portion, the two rotating abutting portions are connected to two sides of the shaft portion, end portions of the two rotating abutting portions are matched with a groove wall of the rotary groove, and a second end of the elastic member abuts against a side wall of the rotating abutting portion.

As an alternative to the battery module, the winding part may have a prismatic or cylindrical shape.

As an alternative of the battery module, a copper sheet is arranged on the winding part and is used for being connected with a pole lug of the battery core.

As an alternative of the battery module, at least one of the bottom plate and the upper cover is provided with a positioning groove for at least a part of the limiting member to be embedded and positioned.

As an alternative of the battery module, the battery module further comprises an energy absorbing member, and the energy absorbing member is arranged at a position adjacent to the limiting member; the energy absorbing member is provided with energy absorbing parts, and the energy absorbing parts are arranged on the energy absorbing member at intervals in the same shape.

In a second aspect, an electronic device is provided, which includes the battery module as described above.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a battery module, which comprises a frame, a plurality of battery cores, a limiting part and a tab connecting piece, wherein the plurality of battery cores are stacked in the frame in parallel; the plurality of limiting parts are arranged in the frame, so that the plurality of battery cells are divided into a plurality of battery cell sets; the corresponding position of locating part is equipped with utmost point ear connecting piece, but utmost point ear connecting piece elastic rotation locates on the frame, and the front end of the utmost point ear of a plurality of electricity core is around on utmost point ear connecting piece to can be along with utmost point ear connecting piece's rotation automatic adjustment utmost point ear around the length on utmost point ear connecting piece, with the inflation of adaptation electricity core, can avoid dragging the damage utmost point ear, can avoid utmost point ear and frame electricity to be connected again, improve battery module's stability.

The utility model provides an electronic device through using above-mentioned battery module, makes battery modulability more stable, and electronic device's security obtains improving.

Drawings

Fig. 1 is an exploded view of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a tab connector according to an embodiment of the present invention;

fig. 3 is a schematic structural view illustrating the cooperation between the rotary groove and the elastic member according to the embodiment of the present invention;

fig. 4 is a schematic top view of a battery cell stacking structure inside a battery module according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a buffer member according to an embodiment of the present invention;

fig. 6 is an exemplary installation diagram of a limiting member and an energy absorbing member according to an embodiment of the present invention;

fig. 7 is a schematic view illustrating an installation of another example of the limiting member and the energy absorbing member according to an embodiment of the present invention.

Reference numerals:

1. a frame; 11. a base plate; 111. positioning a groove; 12. an upper cover; 13. a side plate; 14. an end plate;

2. an electric core;

3. a stopper;

4. a buffer member; 41. an outer frame portion; 42. a buffer section;

5. an energy absorbing member; 51. an energy absorbing portion;

6. a positioning member;

7. a tab connector; 71. a winding section; 72. a rotating part; 721. a shaft portion; 722. a rotating abutment;

8. a rotating tank; 81. an arc-shaped accommodating groove;

9. an elastic member.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of the 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 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to 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 "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific 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. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Fig. 1 shows a basic structure of a battery module according to an embodiment of the present invention. As shown in fig. 1, the battery module includes a frame 1, a battery cell 2, and a stopper 3. The frame 1 includes a bottom plate 11, an upper cover 12, side plates 13, and end plates 14, and the bottom plate 11, the cover plate 12, the two side plates 13, and the two end plates 14 are cooperatively configured into a rectangular box shape. The lateral surface of the lateral plate 13 deviating from the electric core 2 is also provided with a hoisting rib protruding outwards for hoisting the whole battery module. The battery cells 2 are substantially rectangular packages, and a plurality of battery cells 2 are stacked in parallel in the frame 1. A plurality of locating parts 3 are arranged in the frame 1, so that the plurality of battery cells 2 are divided into a plurality of battery cell sets. When the electric core 2 expands, the expansion force and the expansion displacement generated by the electric core 2 are isolated in the independent space where the electric core set is located by the limiting part 3, and the fixedly arranged limiting part 3 bears the expansion force generated by the electric core set in the separated space, so that the expansion force and the expansion displacement are prevented from being transmitted to other electric core sets. Even take place expanded electric core 2 just to be located curb plate 13 and spacing part 3 divided space, because the quantity of electric core 2 in a separate space has obtained the restriction, its produced bulging force and inflation position can not accumulate to the size that curb plate 13 intensity is difficult to bear yet, thereby can avoid the utmost point ear welding part of electric core 2 in the outside to be because of too big inflation displacement fracture inefficacy, the bulging force that the curb plate 13 received on electric core 2 inflation direction has effectively been reduced simultaneously, the security that has showing and has improved battery module.

In fig. 1, a bottom plate 11 and an upper cover 12 are disposed opposite to each other, a positioning groove 111 is disposed on at least one of the bottom plate 11 and the upper cover 12, and the limiting member 3 is embedded into the positioning groove 111 for positioning, so as to facilitate positioning and assembling of the limiting member 3. Illustratively, the limiting member 3 is fixedly connected with the bottom plate 11 and the upper cover 12 through bolts, but in other embodiments, the limiting member 3 may also be fixedly connected with the bottom plate 11 and the upper cover 12 through welding or riveting. In the embodiment shown in fig. 1, two parallel limiting members 3 and two positioning slots 111 correspondingly disposed on the bottom plate 11 are disposed in the frame 1, and by fixing the limiting members 3 on the positioning slots 111, the frame 1 is divided into 3 independent spaces. It should be understood that the number of the limiting members 3 and the positioning grooves 111 is only an example. As described above, a person skilled in the art can reasonably select the number of the positioning grooves 111 and the limiting members 3 according to the number of the battery cells 2 arranged in the battery module to be used.

Considering the stress intensity limit of the side plate 13 and the limiting member 3, the number of the limiting members 3 may be 2-5, and the number of the battery cells 2 in each space partitioned by the limiting member 3 is 3-9, and preferably 4-8. Such a configuration can ensure that the maximum expansion force actually received by the side plates 13 does not exceed the strength limit thereof, and at the same time, the number of the limiting members 3 is reduced to ensure the utilization rate of the internal space of the battery module and light weight as much as possible. The locating part 3 can be made of a material with high strength and light weight, and the light weight of the whole battery module is realized on the premise that the cell set expansive force formed by the plurality of cells 2 is sufficiently borne.

Because the setting of locating part 3 for the distance of the 3 both sides of locating part electric core 2 is far away, if the length of the utmost point ear of electric core 2 is short in required connection length, then cause the utmost point ear junction to drag the power too big easily, and if the length of the utmost point ear of electric core 2 is far more than required connection length, then the utmost point ear easily with the frame 1 contact of battery module, influence electric core 2 stability.

In order to solve the problem, in fig. 1, the battery module still includes utmost point ear connection piece 7, the corresponding position department of locating part 3 is equipped with utmost point ear connection piece 7, but utmost point ear connection piece 7 elasticity is rotationally located on frame 1, the front end of the utmost point ear of a plurality of electricity core 2 centers on utmost point ear connection piece 7, and can center on the length on utmost point ear connection piece 7 along with utmost point ear connection piece 7's rotation automatic adjustment utmost point ear, in order to adapt to the inflation of electricity core 2, both can avoid dragging the damage utmost point ear, can avoid utmost point ear and frame 1 electricity to be connected again, improve the stability of battery module. The two ends of the tab connecting piece 7 are respectively connected with the bottom plate 11 and the upper cover 12 in an elastic rotation manner. All be equipped with the swivelling chute 8 on bottom plate 11 and the upper cover 12, in the swivelling chute 8 was rotationally located to utmost point ear connecting piece 7, and be equipped with elastic component 9 between utmost point ear connecting piece 7 and the swivelling chute 8, elastic component 9 makes utmost point ear connecting piece 7 can the elasticity rotate.

Fig. 2 shows a schematic view of the structure of the tab connection 7. Fig. 3 shows a schematic structural view of the rotation groove cooperating with the elastic member. As shown in fig. 2-3, the tab connection member 7 includes a winding portion 71 and a rotating portion 72, the winding portion 71 is used for winding a tab of the fixed electrical core 2, an arc-shaped accommodation groove 81 is provided in the rotating groove 8, a first end of the elastic member 9 is disposed in the arc-shaped accommodation groove 81, and a second end of the elastic member abuts against a side wall of the rotating portion 72. Specifically, the both ends of rotation portion 72 and the cell wall normal running fit of swivelling chute 8, the lateral wall and the elastic component 9 butt of rotation portion 72, elastic component 9 are in compression state all the time to for rotation portion 72 provides anticlockwise pivoted power, guarantee that the utmost point ear of the electric core 2 of locating part 3 both sides is in taut state, avoid utmost point ear and frame 1 electrical contact.

In fig. 2, the rotating portion 72 includes a shaft portion 721 and two rotating abutting portions 722, the two rotating abutting portions 722 are connected to two sides of the shaft portion 721, ends of the two rotating abutting portions 722 are engaged with groove walls of the rotating groove 8, and a second end of the elastic member 9 is abutted against side walls of the rotating abutting portions 722. Of course, in another example, the rotating portion 72 may have a rectangular structure with both ends of the arc shape, the arc shape of both ends of the rotating portion 72 is rotationally engaged with the arc inner wall of the rotating groove 8, and the elastic piece 9 abuts against the side wall of the rotating portion 72. In fig. 2, the winding portion 71 is prism-shaped, and a copper sheet is provided on the winding portion 71 for connecting with a tab of the battery cell 2. In other examples, the winding portion 71 may also be cylindrical, as long as it can facilitate fixing of the copper sheet and connection of the tabs of the battery cell 2, which is not limited herein.

Fig. 4 shows a top view of the battery module internal cell stacking structure provided by the present invention. As shown in fig. 4, the tabs of the plurality of battery cells 2 located on the left side of the limiting member 3 are fixed on the right side of the tab connecting member 7, and the tabs of the plurality of battery cells 2 located on the right side of the limiting member 3 are fixed on the left side of the tab connecting member 7, so that the battery cells 2 on the two sides of the limiting member 3 are wound on the tab connecting member 7 in opposite directions. When the battery cells 2 on the two sides of the limiting part 3 expand towards the direction departing from the limiting part 3, the lugs on the two sides of the limiting part 3 pull the lug connection 7 to rotate clockwise, and the lugs of the battery cells 2 on the two sides of the limiting part 3 can increase along with the rotation length of the lug connection part 7; when the battery cells 2 on the two sides of the limiting part 3 all expand towards the direction of the limiting part 3, the tab connecting piece 7 rotates anticlockwise, and the tabs of the battery cells 2 on the two sides of the limiting part 3 can be reduced along with the rotation length of the tab connecting piece 7. Therefore, the length of the electrode lug of the battery cell 2 can be automatically adjusted according to the expansion of the battery cell 2 by arranging the electrode lug connecting piece 7 so as to adapt to the expansion of the battery cell 2.

In fig. 4, the battery module further includes a buffer member 4, the buffer member 4 is disposed between two adjacent battery cells 2, and the plurality of buffer members 4 are respectively inserted between the adjacent battery cells 2 and between the battery cell 2 on the outermost side and the adjacent side plate 13. The buffer member 4 interposed between the electric cores 2 may also be only interposed between two electric cores 2 connected in series, and the electric cores 2 connected in parallel are adhered by a double-sided adhesive tape or a spray adhesive. Of course, in other embodiments, the buffer member 4 may be disposed only between adjacent battery cells 2, and the buffer member 4 may be used to absorb the expansion amount of the battery cells 2. One or more buffering parts 4 can be arranged between every two adjacent electric cores 2, the arrangement positions and the number of the buffering parts 4 can be designed according to actual needs, and when the electric cores 2 are ensured to expand, the expansion amount can be absorbed by the buffering parts 4 as far as possible to reduce the displacement amount transferred to other electric cores 2, which is not illustrated one by one.

Fig. 5 shows the structure of the buffer member 4, and as shown in fig. 5, the present invention provides a novel buffer member 4, which comprises an outer frame portion 41 and a buffer portion 42, wherein the outer frame portion 41 has a hardness greater than that of the buffer portion 42. Preferably, the outer frame 41 is made of a metal material having a certain hardness, and the buffer 42 is made of a soft polyester-based elastic material. Because electric core 2 is when taking place the inflation, the inflation volume of central point position obviously is greater than inflation volume all around, through setting up like this have certain rigidity all around and the higher bolster 4 of central part shock-absorbing capacity, can utilize buffer 42 fully to absorb the bulging force of electric core 2 central area, outer frame portion 41 still keeps the original form of bolster 4, make it hardly take place deformation or displacement, thereby effectively reduced the displacement transmission of inflation electric core 2, the stability and the reliability of whole battery module have been improved.

In fig. 4, the battery module further includes an energy absorbing member 5, and the energy absorbing member 5 is disposed at a position adjacent to the limiting member 3, and is configured to absorb the expansion force of the battery cells 2 on two sides of the limiting member 3. The energy absorber 5 is long and has a length substantially equal to that of the stopper 3. The energy absorbing member 5 is disposed at a position adjacent to the limiting member 3, and may be located at a position adjacent to any one side or two sides of the limiting member 3, so as to absorb the expansion force of the battery cell 2. Fig. 4 shows an arrangement in which energy absorbing members 5 are provided on both the left and right sides of the limiting member 3.

Fig. 6 shows a schematic structural diagram of an example of the limiting member 3 and the energy absorbing member 5 provided by the present invention. As shown in fig. 6, the energy absorbing member 5 includes energy absorbing portions 51, a plurality of the energy absorbing portions 51 are arranged at intervals on the energy absorbing member 5 in the same shape, and the energy absorbing portions 51 are in contact with the surface of the battery cell 2. In fig. 6, the energy absorbing member 5 and the restraining member 3 are only disposed adjacent to each other, and no restraining connection is used between them.

Fig. 7 shows a schematic structural diagram of another example of the limiting member 3 and the energy absorbing member 5 provided by the present invention. As shown in fig. 7, the energy absorbing member 5 includes energy absorbing portions 51, a plurality of the energy absorbing portions 51 are arranged at intervals on the energy absorbing member 5 in the same shape, and the energy absorbing portions 51 are in contact with the surface of the battery cell 2. In fig. 7, the energy absorbing member 5 and the restraining member 3 are connected by a positioning member 6. Specifically, the energy absorbing member 5 is fixed to the stopper 3 by a plurality of positioning members 6. The positioning members 6 are arranged in a row along the length direction of the limiting member 3, and the energy absorbing member 5 is fixedly assembled to the limiting member 3. Exemplarily, the energy absorbing part 5 can be assembled to the limiting part 3 through two rows of positioning parts 6, and the two rows of positioning parts 6 are arranged in parallel along the width direction of the limiting part 3, so that the energy absorbing part 5 can be stably assembled, and the energy absorbing effect is prevented from being influenced by movement and dislocation in the frame 1 when the energy absorbing part 5 is extruded. The spacer 6 is a bolt, and the energy absorbing member 5 is screwed to the stopper 3 by the spacer 6. Compared with the technical scheme without bolt connection, the transverse displacement of the energy absorbing piece 5 relative to the limiting piece 3 can be eliminated, and the reliability and the stability of the module structure are further improved.

In the example of the energy absorbing member 5 of fig. 6 and 7, the energy absorbing member 5 is entirely made of a material having a certain rigidity, and a plurality of convex energy absorbing portions 51 are formed on the surface thereof. The energy absorbing portion 51 of the energy absorbing member 5 is a raised rectangular shape, and a plurality of rectangular raised energy absorbing portions 51 are arranged at intervals along the length direction of the energy absorbing member 5. Due to the structure, when the adjacent battery cells 2 expand and generate extrusion displacement towards the adjacent battery cells, the energy absorbing parts 51 protruding from the surfaces of the energy absorbing pieces 5 are firstly subjected to the thrust generated by the displacement, and are locally deformed or locally sunken, so that the original thickness of the protruding structures is flattened to a certain degree, and a part of the thrust generated by expansion is absorbed, and the influence caused by the expansion force can be reduced or even eliminated. Meanwhile, the main body of the energy absorbing part 5 is made of rigid materials, so that the local stress deformation of the energy absorbing part 51 is difficult to influence the setting form of the main body, the reinforcing effect is exerted on the limiting part 3 to a certain extent, and the stability of the inside of the whole battery module is further improved.

Furthermore, the plurality of energy absorbing parts 51 arranged on the energy absorbing member 5 are arranged on the energy absorbing member 5 at intervals in the same shape, so that all the energy absorbing parts 51 are flush with the contact surface of the battery cell 2, and the energy absorbing parts 51 are ensured to be uniformly contacted with the battery cell 2. In the embodiment of the present invention, the protruding directions of the energy absorbing portions 51 adjacently disposed are opposite, that is, the protruding directions are alternately disposed. This design makes energy-absorbing piece 5 all protruding be equipped with energy-absorbing portion 51 in both sides orientation, can guarantee that the atress of this part is even and stable in structure, improves the energy-absorbing effect of energy-absorbing piece 5. The two energy absorbing pieces 5 on the left side and the right side of the limiting piece 3 are symmetrically arranged, so that the protruding direction of the energy absorbing part 51 of the energy absorbing piece 5 is axisymmetric relative to the limiting piece 3, and the stress uniformity and the structural stability are further improved by the symmetrical structure.

The shape of the energy absorbing portion 51 is not particularly limited, and it is preferable that the energy absorbing portions are arranged at regular intervals in the same shape (in this case, the same size and shape, and the same shape can be completely overlapped). Although energy absorbing portion 51 is shown as being formed as a raised rectangular package, one skilled in the art can provide any shape as desired.

For example, the energy absorbing member 5 may be a metal plate formed integrally, and the energy absorbing portion 51 is formed on the metal plate by punching. In other embodiments, the energy absorbing member 5 may also be a rubber plate with certain plasticity, the energy absorbing portion 51 may be formed by injection molding, and the energy absorbing portion 51 absorbs the expansion force of the battery cell 2 through elastic deformation. In addition, energy-absorbing piece 5 also can adopt structure and material the same with bolster 4 for absorb the bulging force of electric core 2.

The embodiment also provides an electronic device (not shown in the figure), which comprises the battery module. The electronic device has the advantages that by applying the battery module, the thermal expansion amount of the battery module is small, the performance of the battery module is stable, and the safety of the electronic device is improved.

Alternatively, the electronic device may be an electric vehicle.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A battery module, comprising:

a frame;

a plurality of cells stacked in parallel within the frame;

the limiting parts are arranged in the frame, so that the battery cells are divided into a plurality of battery cell sets;

the utmost point ear connecting piece, the corresponding position of locating part is equipped with utmost point ear connecting piece, utmost point ear connecting piece can locate with elastic rotation on the frame, a plurality of the front end of the utmost point ear of electric core centers on the utmost point ear connecting piece, and can be along with utmost point ear connecting piece's rotation automatic adjustment utmost point ear centers on length on the utmost point ear connecting piece.

2. The battery module according to claim 1, wherein the frame comprises a bottom plate and an upper cover, the bottom plate and the upper cover are provided with rotating grooves, and two ends of the tab connecting member are elastically and rotatably engaged with the rotating grooves on the bottom plate and the rotating grooves on the upper cover, respectively.

3. The battery module according to claim 2, wherein the tab connection member includes a winding portion and a rotation portion, the winding portion is used for winding and fixing a tab of the electric core, an elastic member extending along a circumferential direction of the rotation portion is disposed in the rotation groove, two ends of the rotation portion are in running fit with a groove wall of the rotation groove, a side wall of the rotation portion abuts against the elastic member, and the elastic member is always in a compressed state.

4. The battery module according to claim 3, wherein an arc-shaped receiving groove is formed in the rotation groove, a first end of the elastic member is disposed in the arc-shaped receiving groove, and a second end of the elastic member abuts against the rotation portion.

5. The battery module according to claim 4, wherein the rotating part comprises a shaft part and two rotating abutting parts, the two rotating abutting parts are connected to two sides of the shaft part, the end parts of the two rotating abutting parts are matched with the groove wall of the rotating groove, and the second end of the elastic member abuts against the side wall of the rotating abutting part.

6. The battery module according to claim 4, wherein the winding part has a prismatic or cylindrical shape.

7. The battery module according to any one of claims 3 to 6, wherein the winding part is provided with a copper sheet, and the copper sheet is used for being connected with a lug of the battery core.

8. The battery module according to any one of claims 2 to 6, wherein at least one of the base plate and the upper cover is provided with a positioning groove for positioning at least a portion of the retaining member.

9. The battery module according to any one of claims 1 to 6, further comprising an energy absorbing member disposed adjacent to the stopper member; the energy absorbing member includes energy absorbing portions, and the plurality of energy absorbing portions are arranged on the energy absorbing member at intervals in the same shape.

10. An electronic device, characterized by comprising the battery module according to any one of claims 1 to 9.

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