CN218919171U - Battery module and battery device - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a battery module and a battery device; the battery module comprises a battery pack and a separation plate; the battery pack comprises a plurality of single batteries, the length of the battery pack in a first direction is larger than the width of the battery pack in a second direction, and the first direction is intersected with the second direction; the division board is located one side of group battery, the division board is greater than in the length of first direction the division board is in the width of second direction, and the division board includes two at least sub-division boards, and two at least sub-division boards are arranged along first direction and are connected, and are provided with mosaic structure between two adjacent sub-division boards, in the second direction, mosaic structure extends to opposite other end from the one end of division board. The battery module is longer in length, lower in preparation cost and easy to prepare.

Description

Battery module and battery device

Technical Field

The disclosure relates to the technical field of batteries, in particular to a battery module and a battery device comprising the battery module.

Background

With the rapid development of modern industry, the problems of environmental pollution, energy shortage, resource exhaustion and the like brought along with the rapid development of the modern industry are more and more prominent. In order to maintain economic sustainable development and protect the environment and energy supply for human living, zero emission of battery devices is the first choice as a new energy source.

However, the current long battery modules are costly and difficult to manufacture.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcoming the drawbacks of the related art, such as high cost and difficulty in manufacturing, and providing a battery module with low cost and easy manufacturing, and a battery device including the battery module.

According to an aspect of the present disclosure, there is provided a battery module including:

the battery pack comprises a plurality of single batteries, wherein the length of the battery pack in a first direction is larger than the width of the battery pack in a second direction, and the first direction is intersected with the second direction;

the division board is located one side of group battery, the division board is in the length of first direction is greater than the division board is in the width of second direction, the division board includes two at least child division boards, two at least child division boards are followed first direction is arranged and is connected, and adjacent two be provided with mosaic structure between the child division board in the second direction on, mosaic structure follows the one end of division board extends to relative other end.

According to the battery module, on one hand, the isolation plate is of a structure that at least two sub-isolation plates with shorter lengths are connected with each other, the sub-isolation plates with shorter lengths can be realized very well through an injection molding process or a mechanical processing process, and the cost is low and the quality can be ensured; on the other hand, a splicing structure is arranged between two adjacent sub-isolation plates, the surfaces of the isolation plates formed by connecting the splicing structures are smooth, a smooth supporting surface can be provided for the busbar assembly, the possibility that the busbar assembly is broken after frequent vibration in the use process can be reduced, and the reliability of the battery module is improved; in still another aspect, the splicing structure extends from one end of the isolation plate to the opposite end in the second direction, so that the reliability of connection between two adjacent sub-isolation plates is ensured, and the reliability of the battery module is increased.

According to another aspect of the present disclosure, there is provided a battery device including:

a battery box;

the battery module is the battery module and is arranged in the battery box.

According to the battery device, on one hand, the isolating plate is of a structure that at least two sub-isolating plates with shorter lengths are connected with each other, the sub-isolating plates with shorter lengths can be realized very well through an injection molding process or a mechanical processing process, and the cost is low and the quality can be ensured; on the other hand, a splicing structure is arranged between two adjacent sub-isolation plates, the surfaces of the isolation plates formed by connecting the splicing structures are flat, a flat supporting surface can be provided for the busbar assembly, the possibility that the busbar assembly is broken after frequent vibration in the use process can be reduced, and the reliability of the battery module and the battery device is improved; in still another aspect, the splice structure extends from one end of the separator to the opposite end in the second direction, ensuring the reliability of connection between the adjacent two sub-separators, and increasing the reliability of the battery module and the battery device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic perspective view of an exemplary embodiment of a battery device of the present disclosure.

Fig. 2 is a schematic perspective view of an exemplary embodiment of the spacer in fig. 1.

Fig. 3 is a schematic perspective view of an exemplary embodiment of the first sub-dividing plate in fig. 2.

Fig. 4 is a schematic perspective view of an exemplary embodiment of the second sub-dividing plate in fig. 2.

Fig. 5 is a partial perspective view of the separator in fig. 2, as seen from the battery pack side.

Fig. 6 is a partial perspective view of the spacer mounting busbar assembly of fig. 2.

Reference numerals illustrate:

1. a battery pack; 11. a single battery;

2. a partition plate; 2a, a sub-isolation plate; 21. a first sub-partition plate; 211. a first separator body portion; 212. a limit column; 213. a first flanging; 2131. protruding the buckle; 214. a first reinforcing rib; 215. a first fold-over overlap;

22. a second sub-partition plate; 221. a second separator body portion; 222. a lap joint; 223. a limiting hole; 224. a second flanging; 225. a second fold-over overlap; 2251. a through hole; 226. a second reinforcing rib;

23. a splice structure; 231. a first protrusion; 232. a first concave portion; 233. a second concave portion; 234. a second protruding portion;

3. a busbar assembly; 31. a busbar; 311. an extension; 32. a signal acquisition terminal;

4. a battery box; 41. a side frame;

x, a first direction; y, second direction; z, third direction.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.

In the present application, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly, and for example, "coupled" may be either fixedly coupled, detachably coupled, or integrally formed; can be directly connected or indirectly connected through an intermediate medium. "and/or" is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The exemplary embodiments of the present disclosure provide a battery module, which may include a battery pack 1 and a separator 2, as shown with reference to fig. 1 to 6; the battery pack 1 may include a plurality of unit cells 11, the length of the battery pack 1 in the first direction X being greater than the width of the battery pack 1 in the second direction Y, the first direction X intersecting the second direction Y; the separator 2 is arranged at one side of the battery pack 1, the length of the separator 2 in the first direction X is greater than the width of the separator 2 in the second direction Y, the separator 2 comprises at least two sub-separators 2a, the at least two sub-separators 2a are connected in an arrayed manner along the first direction X, a splicing structure 23 is arranged between the two adjacent sub-separators 2a, and in the second direction Y, the splicing structure 23 extends from one end of the separator 2 to the opposite end.

Based on the same inventive concept, the exemplary embodiments of the present disclosure provide a battery device, which may include a battery case 4 and a battery module, as shown with reference to fig. 1; the battery module is any one of the following, and is provided in the battery case 4.

According to the battery module and the battery device, on one hand, the isolation plate 2 is of a structure that at least two sub-isolation plates 2a with shorter lengths are connected with each other, the sub-isolation plates 2a with shorter lengths can be realized very well through an injection molding process or a mechanical processing process, and the cost is low and the quality can be ensured; on the other hand, the splicing structure 23 is arranged between two adjacent sub-isolating plates 2a, the surface of the isolating plate 2 formed by connecting the splicing structures 23 is flat, a flat supporting surface can be provided for the busbar assembly 3, the possibility that the busbar assembly 3 is broken after frequent vibration in the use process can be reduced, and the reliability of the battery module and the battery device is improved; on the other hand, the splice structure 23 extends from one end to the opposite end of the separator 2 in the second direction Y, ensuring the reliability of connection between the adjacent two sub-separators 2a, and increasing the reliability of the battery module and the battery device.

The battery module and the battery device are exemplified below.

It should be noted that, the first direction X and the second direction Y are parallel to the bottom plate, and the first direction X intersects with the second direction Y, for example, the first direction X is perpendicular to the second direction Y; the third direction Z is perpendicular to the bottom plate.

In the present exemplary embodiment, referring to fig. 1, since the unit cells 11 are shielded by the partition plate 2, the battery device may include a battery case 4, the battery case 4 may include a bottom plate (not shown), a protective cover (not shown), and a side frame 41, the bottom plate and the protective cover may be rectangular, the side frame 41 is disposed around the bottom plate, the side frame 41 is connected end to form a rectangular frame, the protective cover is disposed at the other side of the side frame 41, and the protective cover is disposed opposite to the bottom plate. The bottom plate, the protective cover and the side frames 41 surround to form an accommodation space.

Of course, in other example embodiments of the present disclosure, the bottom plate and the protective cover may be provided in a circular shape, an oval shape, a trapezoid shape, etc., and the side frames 41 may be formed around the circular shape, the oval shape, the trapezoid shape, etc., such that the battery case 4 is formed in a cylindrical shape, an oval cylindrical shape, a prismatic shape, etc. The battery case 4 may have other shapes, and will not be described in detail herein.

In the present exemplary embodiment, referring to fig. 1, a battery module is provided in a battery case 4, and the battery module may include two battery packs 1, and the battery packs 1 may include a plurality of unit cells 11, and the unit cells 11 may be cylindrical. The unit cell 11 may include a battery case and an electric core. The battery housing may be provided in a cylindrical shape, i.e., the battery housing may include a first face and a second face which are disposed opposite to each other, the first face and the second face are both provided in a circular shape, a third face is connected between the first face and the second face, and the third face is provided in a cylindrical surface. A through hole is provided in the first face.

In this exemplary embodiment, an electrical cell is provided in the receptacle of the battery housing, the electrical cell being provided as a cylinder adapted to the battery housing. The battery cell may include a plurality of positive electrode sheets and a plurality of negative electrode sheets.

A battery pole is arranged on one side of the battery core, which is close to the first surface, and a plurality of positive plates are connected to the battery pole; the battery post protrudes from the battery case through the through hole on the first face to form a first electrode of the unit battery 11, which may be a positive electrode. And a plurality of negative electrode sheets are all connected to the first face, and the first face and the entire battery case form a second electrode of the unit battery 11, which may be a negative electrode. The positive electrode and the negative electrode of the unit cell 11 thus disposed are drawn from the same side. Of course, the battery post may be the negative electrode of the unit battery 11, and the first face and the entire battery case may be the positive electrode of the unit battery 11.

The second surfaces of the plurality of unit cells 11 may be adhered to the bottom plate of the battery case 4 by an adhesive, thereby fixing the plurality of unit cells 11 in the battery case 4. The fixing method is simple and convenient, and the fixing is firm.

The plurality of unit cells 11 are arranged along the first direction X to form a row of cell rows, the plurality of cell rows are sequentially arranged along the second direction Y to form a battery pack 1, and the number of unit cells 11 in a row of the first direction X is greater than the number of unit cells 11 in a row of the second direction Y, so that the length of the battery pack 1 in the first direction X is greater than the width of the battery pack 1 in the second direction Y.

In the case where the battery packs 1 are provided in at least two, and at least two battery packs 1 are arranged in the first direction X, the length of the battery module in the first direction X is made much greater than the width of the battery module in the second direction Y.

In addition, a first gap is provided between two adjacent cell rows, and a second gap is provided between two adjacent single cells 11 in the same cell row. Since the unit cells 11 are cylindrical, a receiving space resembling a triangle is formed between two adjacent unit cells 11; the adjacent two battery columns can be arranged in a staggered manner, namely, the single batteries 11 in one battery column are oppositely arranged with the second gaps in the other battery column; the arrangement is such that the unit cells 11 in the adjacent cell rows occupy a part of the accommodation space, and the occupancy rate of the space in the battery box 4 is increased, thereby increasing the energy density of the battery device.

Of course, in other example embodiments of the present disclosure, adjacent two columns of battery columns may not be arranged offset; that is, the unit cells 11 in one row are arranged to face the unit cells 11 in the other row, and the second gaps in the one row are arranged to face the second gaps in the other row.

In the present exemplary embodiment, the separator 2 is provided on one side of the battery pack 1, specifically, the separator 2 is provided on the side of the battery pack 1 on which the battery post is provided. The bus bar assembly 3 is arranged on one side, away from the battery pack 1, of the isolation plate 2, the isolation plate 2 is used for supporting the bus bar assembly 3 and isolating the bus bar assembly 3 from the battery pack 1, and the short circuit caused by the connection of the bus bar assembly 3 and the battery pack 1 at a position where connection is not needed is avoided, so that safety accidents are caused.

Therefore, the separator 2 needs to cover the battery pack 1, that is, the orthographic projection of the battery pack 1 on the first reference plane is located in the edge line of the orthographic projection of the separator 2 on the first reference plane, which is parallel to the plane formed by the first direction X and the second direction Y, that is, the orthographic projection of the battery pack 1 on the bottom plate is located in the edge line of the orthographic projection of the separator 2 on the bottom plate. Therefore, the length of the separator 2 in the first direction X is greater than the width of the separator 2 in the second direction Y. The length of the isolation board 2 is longer and is more than 1.8 meters; it is difficult to realize both injection molding and machining processes, and even if it is barely processable, the machining cost is extremely high and the quality is difficult to ensure. Of course, in other example embodiments of the present disclosure, the separator 2 may be slightly smaller such that the edge portion of the battery pack 1 protrudes from the separator 2.

In the present exemplary embodiment, the separator 2 may include at least two sub-separators 2a, at least two sub-separators 2a being connected in an aligned manner along the first direction X, that is, the separator 2 is configured in a structure in which at least two sub-separators 2a having a shorter length are connected to each other, the sub-separators 2a having a shorter length can be realized by an injection molding process or a machining process, and the cost is low and the quality can be ensured. Be provided with mosaic structure 23 between two adjacent sub-division boards 2a, the surface of division board 2 that forms through mosaic structure 23 connection is comparatively level and smooth, can provide comparatively level holding surface for busbar subassembly 3, if the plane that supports busbar subassembly 3 is uneven, in the use, receives frequent vibration back, busbar subassembly 3 break easily, consequently, can avoid busbar subassembly 3 rupture, increases battery device's reliability. The splice structure 23 extends from one end of the separator 2 to the opposite end in the second direction Y, ensuring the reliability of connection between the adjacent two sub-separators 2a, and increasing the reliability of the battery device.

Referring to fig. 2 to 6, the following description will be given by taking an example in which the partition plate 2 includes two sub-partition plates 2a, and the adjacent two sub-partition plates 2a are a first sub-partition plate 21 and a second sub-partition plate 22.

The first sub-partition plate 21 may include a first partition plate body portion 211, and the second sub-partition plate 22 may include a second partition plate body portion 221.

The splicing structure 23 may include two first protruding portions 231 and two second recessed portions 233, and referring to fig. 3, the first protruding portions 231 are disposed at an end portion of the first sub-partition plate 21 near the second sub-partition plate 22, specifically, the first protruding portions 231 are disposed at an end portion of the first partition plate body portion 211 near the second sub-partition plate 22; the first protruding portion 231 protrudes in the first direction X, that is, the first protruding portion 231 protrudes outside the first separator body portion 211 in the first direction X.

Referring to fig. 4, the second recess 233 is provided at an end of the second sub-partition plate 22 adjacent to the first sub-partition plate 21, specifically, at an end of the second partition plate body 221 adjacent to the first sub-partition plate 21; the second recess 233 is recessed in the first direction X, i.e., the second recess 233 is recessed in the second separator 2 body in the first direction X.

The first protruding portion 231 is fitted into the second recessed portion 233.

The splicing structure 23 may further include two first concave portions 232 and two second protruding portions 234, as shown in fig. 3, the first concave portions 232 are disposed at an end portion of the first sub-isolation board 21 near the second sub-isolation board 22, specifically, the first concave portions 232 are disposed at an end portion of the first isolation board body portion 211 near the second sub-isolation board 22; the first recess 232 is recessed along the first direction X, that is, the first protrusion 231 is recessed within the first separator body 211 along the first direction X.

Referring to fig. 4, the second protruding portion 234 is provided at an end portion of the second sub-partition plate 22 close to the first sub-partition plate 21, specifically, the second protruding portion 234 is provided at an end portion of the second partition plate body portion 221 close to the first sub-partition plate 21; the second protruding portion 234 protrudes in the first direction X, that is, the second protruding portion 234 protrudes in the first direction X out of the second separator 2 body.

The second protruding portion 234 is fitted into the first recessed portion 232.

Referring to fig. 5, after the first separator body portion 211 and the second separator body portion 221 are joined, the end surface of the second separator body portion 221 adjacent to the first separator body portion 211 abuts against the end surface of the first separator body portion 211.

Also, the two first protruding portions 231 and the two first recessed portions 232 on the first sub-dividing plate 21 are alternately arranged, that is, one first recessed portion 232 is provided between two adjacent first protruding portions 231, and one first protruding portion 231 is provided between two adjacent first recessed portions 232.

The two second protruding portions 234 and the two second recessed portions 233 on the second sub-partition plate 22 are alternately arranged, that is, one second recessed portion 233 is arranged between two adjacent second protruding portions 234, and one second protruding portion 234 is arranged between two adjacent second recessed portions 233.

Of course, in other example embodiments of the present disclosure, only the first protrusion 231 or the first recess 232 may be provided on the first sub-partition plate 21; correspondingly, only the second recess 233 or the second protrusion 234 may be provided at the second sub-partition 22.

Further, the thickness of the first protruding portion 231 in the third direction Z is equal to the depth of the second recessed portion 233 in the third direction Z, and the thickness of the second protruding portion 234 in the third direction Z is equal to the depth of the first recessed portion 232 in the third direction Z; so that the spacer plate 2 forms a planar plate shape at the position of the splicing structure 23, which provides a smoother supporting surface for the busbar assembly 3, and reduces the possibility of breakage of the busbar assembly 3 after frequent vibration during use. In addition, the thickness of the first protruding portion 231 in the third direction Z may be greater than or less than the depth of the second recessed portion 233 in the third direction Z, and the thickness of the second protruding portion 234 in the third direction Z may be greater than or less than the depth of the first recessed portion 232 in the third direction Z.

The first recess 232 and the second recess 233 are both provided as trapezoidal grooves, and the width of the opening is smaller than the width of the bottom, and the first protrusion 231 and the second protrusion 234 are provided as trapezoidal protrusions, respectively. So arranged, the first sub-barrier 21 and the second sub-barrier 22 can be limited in connection in both the first direction X and the second direction Y. Of course, the specific structures of the first concave portion 232, the second concave portion 233, the first protruding portion 231 and the second protruding portion 234 are not limited to the above description, and for example, may be configured as a rectangular structure with a smaller opening, taking the first protruding portion 231 and the first concave portion 232 as an example, the first protruding portion 231 is configured as a rectangular plate, and a connection portion is connected with the first sub-partition 21, the width of the first protruding portion 231 is larger than the width of the connection portion, and the first concave portion 232 is configured as a notch with a smaller opening than the bottom portion; or a multi-semicircular structure is used as an example for describing the first protruding part 231 and the first recessed part 232, the first protruding part 231 is a multi-semicircular plate, a connecting part is connected between the first protruding part 231 and the first sub-isolation plate 21, the diameter of the first protruding part 231 is larger than the width of the connecting part, the first recessed part 232 is provided with an opening part smaller than a notch at the bottom, and the notch is provided with a multi-semicircular shape; of course, other shapes are also possible and are not described in detail herein.

The first recess 232 may be provided as a through groove penetrating the first sub-partition plate 21, i.e., the depth of the first recess 232 is equal to the thickness of the first sub-partition plate 21; the second concave portion 233 is disposed as a through groove penetrating the second sub-partition plate 22, i.e., the depth of the second concave portion 233 is equal to the thickness of the second sub-partition plate 22; the first protruding portion 231 is also provided throughout the first sub-partition plate 21, i.e., the thickness of the first protruding portion 231 is equal to the thickness of the first sub-partition plate 21; the second protrusion 234 is also provided throughout the second sub-partition 22, i.e., the thickness of the second protrusion 234 is equal to the thickness of the second sub-partition 22. Of course, in other exemplary embodiments, the first recess 232 may not penetrate the first sub-partition 21 and may be provided only at one side of the first sub-partition 21; the second recess 233 may not penetrate the second sub-partition plate 22 and may be provided only on one side of the second sub-partition plate 22; the thickness of the first protrusion 231 may be smaller than that of the first sub-partition plate 21; the thickness of the second protrusion 234 may be smaller than that of the second sub-partition plate 22.

In the present exemplary embodiment, referring to fig. 2 to 4, the second sub-partition plate 22 may further include a lap portion 222, the lap portion 222 being connected to an end surface of the second partition plate body portion 221 near the first sub-partition plate 21; and the overlap portion 222 protrudes from the second separator body portion 221, so that the overlap portion 222 may overlap one side of the first separator body portion 211 facing away from the battery pack 1, i.e., the overlap portion 222 overlaps over the first separator body portion 211. The strength of the connection between the first sub-dividing plate 21 and the second sub-dividing plate 22 can be further increased by the overlap 222.

The number of the overlapping parts 222 may be five, and the overlapping parts 222 are provided at both ends of the splice structure 23 in the second direction Y; the overlap portion 222 is also provided on both sides of the second recess 233 in the second direction Y. Of course, the specific location and number of tabs 222 may be provided as desired.

The thickness of the overlap portion 222 is smaller than that of the second separator body 221, and since the overlap portion 222 protrudes from the second separator body 221, the thickness of the overlap portion 222 is set thinner, so that the increased thickness of the separator 2 can be reduced, and the occupation of the space in the battery case 4 can be reduced. Of course, the thickness of the portion where the first separator body portion 211 and the overlap portion 222 are mated may be set thinner, so that the overall thickness of the overlap portion 222 and the first separator body portion 211 will not increase after overlapping.

In addition, a concave portion may be provided on a side of the second sub-partition plate 22 close to the battery pack 1, that is, the second sub-partition plate 22 is thinned from a side close to the battery pack 1; so that the first sub-separator 21 may be interposed between the second sub-separator 22 and the battery pack 1, i.e., the first sub-separator 21 overlaps the second sub-separator 22.

Meanwhile, a concave portion may be also provided on a side of the first sub-partition plate 21 facing away from the battery pack 1, i.e., the first sub-partition plate 21 may be thinned from a side facing away from the battery pack 1; so that the first sub-separator 21 can be inserted between the second sub-separator 22 and the battery pack 1, i.e., the first sub-separator 21 overlaps the second sub-separator 22, it is possible to make both sides of the separator 2, which are close to and away from the battery pack 1, planar.

Further, a limiting post 212 is provided at an end of the first separator body portion 211 near the second sub-separator 22, and the limiting post 212 extends in the third direction Z. The lap joint 222 is provided with a limiting hole 223, and the limiting hole 223 penetrates the lap joint 222 in the third direction Z. The limiting post 212 is fitted in the limiting hole 223, the limiting post 212 may be provided as a cylinder, and correspondingly, the limiting hole 223 is provided as a circular hole. Due to space constraints, a limiting aperture 223 is provided in one of the tabs 222. The shape, number and position of the limiting posts 212 and the shape, number and position of the limiting holes 223 can be set as required.

Referring to fig. 3, the first sub-partition 21 may further include a first flap 213, the first flap 213 being connected to the first partition body 211 to extend at least one side edge in the first direction X, i.e., the first flap 213 being connected to at least one first edge of the first partition body 211, the first edge extending in the first direction X; so that the first flap 213 extends in the first direction X, the length of the first flap 213 being the same as the length of the first sub-dividing plate 21. The first flanging 213 is bent along the third direction Z, that is, a first set included angle is provided between the first flanging 213 and the first separator body 211, the first set included angle is greater than or equal to 85 ° and less than or equal to 95 °, and the first flanging 213 extends to the side close to the battery pack 1; that is, the first folded edge 213 is formed by extending and bending down the first sub-dividing plate 21. The strength of the first sub-spacer 21 can be increased by the first flanging 213, and the battery pack 1 and the bus bar assembly 3 located at both sides of the first flanging 213 can be insulated and isolated, thereby preventing a short circuit from being generated between the battery pack 1 and the bus bar assembly 3.

Referring to fig. 4, the second sub-partition 22 may further include a second flap 224, the second flap 224 being connected to the second partition body 221 to extend at least one side edge in the first direction X, i.e., the second flap 224 being connected to at least one second edge of the second partition body 221, the second edge extending in the first direction X; such that the second flap edge 224 extends in the first direction X, the length of the second flap edge 224 is the same as the length of the second sub-dividing plate 22. The second flanging 224 is bent along the third direction Z, that is, a second set included angle is arranged between the second flanging 224 and the second separator body 221, the second set included angle is greater than or equal to 85 ° and less than or equal to 95 °, and the second flanging 224 extends to the side close to the battery pack 1; that is, the second flap 224 is formed by extending and bending down the second sub-dividing plate 22. The strength of the second sub-spacer 22 can be increased by the second turnup edge 224, and the battery pack 1 and the busbar assembly 3 positioned at both sides of the second turnup edge 224 can be insulated and isolated, so that the short circuit between the battery pack 1 and the busbar assembly 3 is avoided.

The second flanging 224 is disposed opposite to the first flanging 213, i.e. the second flanging 224 is located on the same side of the separator 2 as the first flanging 213.

Further, referring to fig. 4, the second sub-separator 22 may further include a second folding overlap 225, the second folding overlap 225 is connected to an end surface of the second folding edge 224 adjacent to the first folding edge 213, and a thickness of the second folding overlap 225 is smaller than that of the second folding edge 224, so that a side surface of the second folding overlap 225 adjacent to the battery pack 1 is recessed with respect to a side surface of the second folding edge 224 adjacent to the battery pack 1.

The second folding overlap portion 225 overlaps a side of the first folding edge 213, specifically, the second folding overlap portion 225 overlaps a side of the first folding overlap portion 215 facing away from the battery pack 1. In order to ensure that one side surface of the first turnover edge 213 and the second turnover edge 224, which faces away from the battery pack 1, is formed into a plane, as shown in fig. 3, a concave part is formed at the end part of the first turnover edge 213, which is close to the second turnover edge 224, and the concave part forms a first turnover overlap part 215, that is, the first turnover overlap part 215 is connected to the end surface of the first turnover edge 213, which is close to the second turnover edge 224; to mate with the second fold-over tab 225. That is, the first folding edge 213 is thinned to form a part of the first folding overlap portion 215 from the outer side, and the second folding edge 225 is thinned to form a part of the second folding overlap portion 225 from the inner side, so that the second folding overlap portion 225 is matched with the first folding overlap portion 215 at the end of the first folding edge 213, and the sum of the thickness of the first folding overlap portion 215 and the thickness of the second folding overlap portion 225 is equal to the thickness of the first folding edge 213 and also equal to the thickness of the second folding edge 224, so that the side of the first folding edge 213 facing away from the battery pack 1 is coplanar with the side of the second folding edge 224 facing away from the battery pack 1, and the side of the first folding edge 213 facing close to the battery pack 1 is also coplanar with the side of the second folding edge 224 facing towards the battery pack 1, so that the overall thickness of the folding edge is not increased. Of course, the side of the second fold-over tab 225 facing away from the battery pack 1 may be slightly recessed relative to the side of the first fold-over tab 213 facing away from the battery pack 1.

In addition, the second folding and overlapping portion 225 may overlap one side of the first folding and overlapping portion 215 near the battery pack 1, in which case, a side of the first folding and overlapping portion 215 facing away from the battery pack 1 may not protrude from a side of the second folding and overlapping portion 224 facing away from the battery pack 1.

The second folding lap portion 225 is fastened and fixed with the first folding lap portion 215, for example, two protruding buckles 2131 may be disposed on the first folding lap portion 215, two through holes 2251 are disposed on the second folding lap portion 225, and the protruding buckles 2131 are matched in the through holes 2251 to fasten and fix the second folding lap portion 225 with the first folding lap portion 215. The second folding overlap portion 225 is clamped and fixed with the first folding overlap portion 215, so that the fixing firmness between the first sub-isolation board 21 and the second sub-isolation board 22 can be further increased.

In some example embodiments of the present disclosure, referring to fig. 5, the first sub-separator 21 may further include a first reinforcing rib 214, the first reinforcing rib 214 being provided at the first flanging 213, specifically, the first reinforcing rib 214 being provided at a side of the first flanging 213 near the battery pack 1, and the first reinforcing rib 214 extending in the third direction Z. The second sub-separator 22 further includes a second reinforcing rib 226, the second reinforcing rib 226 is disposed on the second turnup edge 224, specifically, the second reinforcing rib 226 is disposed on a side of the second turnup edge 224 close to the battery pack 1, and the second reinforcing rib 226 extends along the third direction Z. Because the bus bar assembly 3 needs to be arranged on one side of the first flanging edge 213, which is away from the battery pack 1, and one side of the second flanging edge 224, which is away from the battery pack 1, the bus bar assembly 3 can be provided with a relatively flat plane by such arrangement, and the bus bar assembly 3 is prevented from being broken due to frequent vibration in the use process.

The strength of the first turned-over edge 213 can be increased by the first reinforcing rib 214, thereby increasing the strength of the first sub-dividing plate 21; the strength of the second turnup edge 224 may be increased by the second reinforcing rib 226, thereby increasing the strength of the second sub-dividing plate 22; thereby increasing the strength of the entire separator 2.

Further, the distance between two adjacent first reinforcing ribs 214 increases with the distance from the splice structure 23, that is, the density of the first reinforcing ribs 214 increases as the first reinforcing ribs 214 are closer to the splice structure 23, and the strength of the first sub-insulation board 21 increases as the first reinforcing ribs 214 are higher; similarly, the distance between two adjacent second reinforcing ribs 226 increases with the distance from the splice structure 23, that is, the density of the second reinforcing ribs 226 increases as the second reinforcing ribs 226 approach the splice structure 23, and the strength of the second sub-insulation board 22 increases as the second reinforcing ribs 226 increase. Since the two ends of the isolation plate 2 are supported by the battery box 4 body and the like and the middle part is easy to deform, the strength of the middle part of the isolation plate 2 can be increased, and the deformation of the middle part of the isolation plate 2 is avoided.

More first reinforcing ribs 214 and more second reinforcing ribs 226 may be disposed at positions opposite to the splice structure 23, so that a distance between two adjacent first reinforcing ribs 214 disposed opposite to the splice structure 23 is smaller than a distance between two adjacent first reinforcing ribs 214 at the rest positions.

Referring to fig. 6, the bus bar assembly 3 may include a plurality of bus bars 31, one bus bar 31 connecting two rows of unit cells 11 arranged in the second direction Y, the plurality of unit cells 11 in one row being connected in parallel with each other, and the two rows of cell rows being connected in series with each other. The bus bar 31 includes an extension portion 311, the extension portion 311 extending to an end of the partition plate 2 provided with the turnup edges (the first turnup edge 213 and the second turnup edge 224); that is, the end portion of the bus bar 31 provided with the turning edges (the first turning edge 213 and the second turning edge 224) in the second direction Y extends to form the extension 311. The signal collecting terminal 32 is connected to the extension portion 311, and the signal collecting terminal 32 may be a nickel plate, and the electrical signal on the bus bar 31 may be collected through the signal collecting terminal 32.

The references to "parallel", "perpendicular" in this application are not entirely parallel, perpendicular, but rather are to some degree of error; for example, the included angle between the two is greater than or equal to 0 ° and less than or equal to 5 °, i.e. the two are considered to be parallel to each other; the included angle between the two is more than or equal to 85 degrees and less than or equal to 95 degrees, namely the two are considered to be mutually perpendicular.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (14)

1. A battery module, comprising:

the battery pack comprises a plurality of single batteries, wherein the length of the battery pack in a first direction is larger than the width of the battery pack in a second direction, and the first direction is intersected with the second direction;

the division board is located one side of group battery, the division board is in the length of first direction is greater than the division board is in the width of second direction, the division board includes two at least child division boards, two at least child division boards are followed first direction is arranged and is connected, and adjacent two be provided with mosaic structure between the child division board in the second direction on, mosaic structure follows the one end of division board extends to relative other end.

2. The battery module according to claim 1, wherein adjacent two of the sub-separators include a first sub-separator and a second sub-separator, and the splice structure includes:

the first protruding part and/or the first concave part are arranged at the end part of the first sub-isolation plate, which is close to the second sub-isolation plate, and protrude or are concave along the first direction;

the second concave part and/or the second protruding part are arranged at the end part of the second sub-isolation plate, which is close to the first sub-isolation plate, and are concave or protruding along the first direction, the first protruding part is matched in the second concave part, and the second protruding part is matched in the first concave part.

3. The battery module of claim 2, wherein a thickness of the first protrusion in a third direction is equal to a depth of the second recess in the third direction, wherein a thickness of the second protrusion in the third direction is equal to a depth of the first recess in the third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the second direction.

4. The battery module according to claim 2, wherein a thickness of the first protrusion in a third direction is equal to a thickness of the first sub-separator in the third direction, and a depth of the first recess in the third direction is equal to the thickness of the first sub-separator in the third direction; the thickness of the second protruding portion in the third direction is equal to the thickness of the second sub-isolation plate in the third direction, and the depth of the second recessed portion in the third direction is equal to the thickness of the second sub-isolation plate in the third direction.

5. The battery module of claim 3, wherein the first sub-separator includes a first separator body portion; the second sub-dividing plate includes:

a second separator body portion, the end face of which near the first separator body portion is in contact with the end face of the first separator body portion;

and the lap joint part is connected with the end face, close to the first sub-isolation plate, of the second isolation plate body part and is lap-jointed with one side of the first isolation plate body part, and the thickness of the lap joint part is smaller than that of the second isolation plate body part.

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

the first sub-dividing plate further includes:

the limiting column is arranged at the end part of the first isolation plate body part, which is close to the second sub isolation plate;

the second sub-dividing plate further includes:

the limiting hole is arranged on the lap joint part; the limit post is matched in the limit hole.

7. The battery module according to claim 5, wherein,

the first sub-dividing plate further includes:

the first turnover edge is connected with at least one first edge of the first isolation plate body part and is bent along a third direction, and the first edge extends along the first direction;

the second sub-dividing plate further includes:

the second turnover edge is connected to at least one second edge of the second isolation plate body part and is bent along the third direction, the second edge extends along the first direction, the second turnover edge is opposite to the first turnover edge, and the third direction is perpendicular to the first direction and is perpendicular to the second direction.

8. The battery module according to claim 7, wherein the battery module,

the first sub-dividing plate further includes:

the first turnover overlap joint part is connected with the end face of the first turnover edge, which is close to the second turnover edge;

the second sub-dividing plate further includes:

the second folding lap joint part is connected to the end face, close to the first folding edge, of the second folding edge, and the second folding lap joint part is fixedly clamped with the first folding lap joint part; the second folding lap joint part is lapped on one side, close to the battery pack, of the first folding lap joint part, and one surface, away from the battery pack, of the first folding lap joint part does not protrude from one surface, away from the battery pack, of the second folding lap joint part; or, the second folding overlap joint portion overlap joint in one side that the first folding overlap joint portion deviates from the group battery, and the second folding overlap joint portion deviate from the one side that the group battery does not protrude in the first folding edge deviates from the group battery.

9. The battery module according to claim 7, wherein the battery module,

the first sub-dividing plate further includes:

the first reinforcing rib is arranged on the first turnover edge and extends along a third direction;

the second sub-dividing plate further includes:

and the second reinforcing rib is arranged on the second turnover edge and extends along the third direction.

10. The battery module according to claim 9, wherein a distance between two adjacent first reinforcing ribs disposed opposite to the splice structure is smaller than a distance between two adjacent first reinforcing ribs at the remaining positions.

11. The battery module according to claim 7, further comprising:

the busbar subassembly is located the division board deviates from one side of group battery, the busbar subassembly includes a plurality of busbar and a plurality of signal acquisition terminal, the busbar includes extension, the extension extends to the division board be equipped with the tip of turning over the hem, signal acquisition terminal connect in the extension.

12. The battery module according to claim 1, wherein the battery packs are provided in at least two, at least two of the battery packs being arranged in the first direction.

13. The battery module according to claim 1, wherein the unit cells are cylindrical cells.

14. A battery device, characterized by comprising:

a battery box;

a battery module according to any one of claims 1 to 13, provided in the battery case.

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