CN214957164U

CN214957164U - Bottom plate structure, battery case and battery module

Info

Publication number: CN214957164U
Application number: CN202120462605.8U
Authority: CN
Inventors: 夏稳; 彭升政
Original assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Current assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-11-30
Anticipated expiration: 2031-03-03

Abstract

The utility model discloses a bottom plate structure, battery case and battery module. The utility model discloses a floor structure is used for forming the shell of battery module, and it includes the bottom plate, and the bottom plate is used for supporting electric core, is equipped with a plurality of sunken holes on the bottom plate, and the opening direction in sunken hole sets up towards the direction of electric core, and the sunk hole includes long section and circular arc section, and long section is rectangular sunken setting, and the circular arc section is the setting of partly hollow globular sunken, and the both ends of long section respectively are connected with the circular arc end. Be provided with a plurality of sunk hole on the bottom plate in this scheme, compare in the bottom plate of general plane, increased bottom plate structure's bulk strength. The utility model also discloses a battery case, including the bottom plate structure. The utility model also discloses a battery module, including battery case.

Description

Bottom plate structure, battery case and battery module

Technical Field

The utility model relates to a battery module technical field especially relates to a bottom plate structure, battery case and battery module.

Background

In the battery module, in order to maintain the volumetric energy density of the battery module, in the related art, a manufacturer may make the bottom plate thinner, but the thinner bottom plate has a problem of weak strength, thereby causing inconvenience to a user.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a floor structure, battery case and battery module can increase floor structure's bulk strength.

The utility model also provides a bottom plate structure for form the shell of battery module, comprising a base plate, the bottom plate is used for supporting electric core, is equipped with a plurality of sunken holes on the bottom plate, the opening direction in sunken hole sets up towards the direction of electric core, the depressed hole includes long section and circular arc section, long section is rectangular sunken setting, the circular arc section is the setting of partly hollow globular sunken, the both ends of long section respectively are connected with the circular arc end.

According to the utility model discloses bottom plate structure has following beneficial effect at least: be provided with a plurality of sunk hole on the bottom plate in this scheme, compare in general planar bottom plate, increased bottom plate structure's bulk strength, and because the effect of the transition of the length of long section and circular arc section, further guaranteed bottom plate structure's stability.

According to some embodiments of the invention, the recessed holes are arranged in rows, and the recessed holes are arranged in different rows in a staggered manner.

According to some embodiments of the utility model, still be equipped with the locating hole on the bottom plate, the locating hole along the long limit setting of bottom plate, just the locating hole with the staggered arrangement of depressed hole.

According to some embodiments of the utility model, the floor structure still includes first connecting plate and takes the board, on the bottom plate, respectively be connected with along the both ends of the direction that electric core piled up first connecting plate, first connecting plate extends to the direction of electric core height, take the board connect in first connecting plate for the opposite side of bottom plate, take the board with first connecting plate becomes to predetermine the angle and connects, it is used for the overlap joint on external equipment to take the board.

According to some embodiments of the utility model, take the board with the connecting plate is 90 degrees settings.

According to some embodiments of the invention, the first connecting plate and the connecting position of the landing plate are provided in a row with a recess.

According to some embodiments of the utility model, the bottom plate along the ascending both ends of the direction of electricity core length respectively are connected with one and support and hold the board, support hold the board with connect through the second connecting plate between the bottom plate, the second connecting plate is kept away from a lateral direction of bottom plate the bottom plate is used for supporting the planar opposite side slope setting of electricity core, and with support and hold the board and connect.

According to some embodiments of the invention, the bottom plate is a sheet-like arrangement.

The utility model also provides a battery case for hold electric core, still include lateral wall, top cap and floor structure, the floor structure with the top cap passes through the lateral wall is connected.

The utility model also provides a battery module, including electric core and battery case, electric core is located among the battery case.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic perspective view of a bottom plate structure in an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an enlarged view taken at A in FIG. 1;

FIG. 5 is an enlarged view at B in FIG. 2;

FIG. 6 is an enlarged view at C of FIG. 3;

FIG. 7 is a schematic view of another angle of FIG. 1;

fig. 8 is an enlarged view at C in fig. 7.

Reference numerals: the base plate structure 100, the base plate 101, the recessed hole 102, the long side 103, the fastening hole 104, the abutting plate 105, the carrying plate 106, the positioning hole 201, the ventilation hole 202, the first connecting plate 301, the recess 401, the long section 501, the circular arc section 502 and the second connecting plate 601.

Detailed Description

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.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The utility model provides a bottom plate structure 100, as shown in fig. 1 to 5, bottom plate structure 100 is used for bearing electric core including bottom plate 101, bottom plate 101 to give electric core holding power. The bottom plate 101 is provided with a plurality of recessed holes 102, and openings of the recessed holes 102 are arranged toward a direction (above as shown in fig. 1) in which the battery cells are located. Compared with a bottom plate structure with a planar structure, the recessed holes 102 on the bottom plate 101 in the present embodiment can increase the strength of the bottom plate 101, thereby enhancing the strength of the entire bottom plate structure 100.

Specifically, as shown in fig. 5, the recessed hole 102 includes a long section 501 and an arc section 502, the long section 501 is disposed along the stacking direction of the battery cells, and two ends of the long section 501 along the stacking direction of the battery cells are respectively connected with one arc section 502, so as to form the whole recessed hole 102. The long section 501 is a strip-shaped recess, and the circular arc section 502 is a partial structure of a hollow spherical recess, for example, the circular arc section 502 is a quarter of a hollow spherical recess, so as to ensure the connection between the long section 501 and the circular arc section 502. The long section 501 on the recessed hole 102 is longer, which not only can enhance the strength of the base plate by 100, but also can facilitate the processing of the recessed hole 102 and save the time of a processor compared with a structure in which a plurality of short and small recesses are arranged on the base plate. Because the arc section 502 can be smoothly spliced with the long section 501, the structure avoids the internal stress of the recess hole 102 as much as possible, and the service life of the bottom plate structure 100 is ensured.

Specifically, as shown in fig. 1 to 5, all the recessed holes 102 are arranged in multiple rows, and the recessed holes 102 in each row are arranged in parallel and staggered, so that the strength of the bottom plate 101 can be enhanced, and the bottom plate is not easily deformed when carrying the battery cells.

Specifically, as shown in fig. 1 to 5, the bottom plate 101 is further provided with a positioning hole 201, the positioning hole 201 can be matched with the side wall, so as to assemble and form a partial structure of the battery casing, when the side wall needs to be installed on the long side 103 of the bottom plate 101 (the upper and lower sides shown in fig. 2), the partial structure of the side wall can be inserted into the positioning hole 201, so as to ensure accurate positioning of the side wall and the bottom plate 101. It can be understood that, for convenience, the two side walls are respectively installed on different long sides 103 of the bottom plate 101, so the positioning holes 201 are symmetrically arranged on the two long sides 103.

Specifically, as shown in fig. 1 to 5, the positioning holes 201 and the recessed holes 102 are staggered, so as to further ensure the strength of the base plate 101.

As shown in fig. 1 to 6, the base structure 100 further includes a first connecting plate 301 and a mounting plate 106, and the mounting plate 106 is connected to the base 101 through the first connecting plate 301. A first connection plate 301 is connected to each of two ends of the base plate 101 along the cell stacking direction (the left-right direction shown in fig. 3), the first connection plate 301 extends in the cell height direction (above the cell height direction shown in fig. 3), and the mounting plate 106 is connected to the first connection plate 301 at a predetermined angle, when the base plate structure 100 is connected to an external device, one side of the first connection plate 301 facing outward (located on the left side of the first connection plate 301 in fig. 3, and the other side is located on the right side of the first connection plate 301, which is not shown) can be abutted against the external device, and the mounting plate 106 can be mounted on the external device, so that the external device is located in the space formed by the first connection plate 301 and the mounting plate 106, the base plate 101 increases the contact area with the external device through the first connection plate 301 and the mounting plate 106, and the base plate structure 100 can be positioned with the external device in the up-down direction and the left-right direction shown in fig. 1, thereby alleviating the positioning problem between the backplane structure 100 and external devices.

As shown in fig. 3 and 6, the first connection plate 301 and the mounting plate 106 are disposed at an angle of about 90 degrees therebetween, which makes it possible to more adapt to the shape of an external device when the floor structure 100 is connected to the external device.

It is understood that when the external device has other specific shapes, other connection angles between the first connection plate 301 and the mounting plate 106 may be provided to adapt the installation of the bottom plate structure 100 and the external device.

Specifically, each of the load plates 106 is further provided with a fastening hole 104, and a fastening member may be coupled to an external device through the fastening hole 104, so as to ensure the coupling stability of the floor structure 100 to the external device.

Specifically, as shown in fig. 1 to 6, a plurality of vent holes 202 are formed in the bottom plate 101 along the long side 103 (the sides on the upper side and the lower side as shown in fig. 2) of the bottom plate 101, and the vent holes 202 penetrate through the bottom plate 101, so that when a battery cell is located on the bottom plate 101, the ventilation performance of the battery cell is enhanced, the occurrence of thermal runaway is prevented, and the service life of the battery cell is prolonged.

Specifically, as shown in fig. 1 to 6, the positioning holes 201 and the ventilation holes 202 are arranged in a staggered manner, that is, the positioning holes 201 are located between the two ventilation holes 202, so that on the basis of ensuring the functions of the positioning holes 201 and the ventilation holes 202, the strength of the bottom plate 101 is further ensured, and the strength and the stability of the bottom plate structure 100 are ensured.

Specifically, as shown in fig. 1 to 6, the connection positions between the first connection plate 301 and the load plate 106 are provided with the recesses 401 in a row, so that the strength of the connection positions between the first connection plate 301 and the load plate 106 is enhanced, thereby ensuring the overall strength of the floor structure 100.

Specifically, as shown in fig. 7 and 8, two long sides 103 (length direction of the battery cell) of the bottom plate 101 are connected to one abutting plate 105, the abutting plate 105 is connected to the bottom plate 101 through a second connecting plate 601, and along a direction away from the bottom plate 101, the second connecting plate 601 is gradually inclined downward as shown in fig. 8, so that the abutting plate 105 is located below the bottom plate 101. Therefore, when the bottom plate structure 100 is connected with an external device, a little gap is formed between the bottom plate 101 and the external device, and the problem that the contact between the bottom plate structure 100 and the external device is not stable due to insufficient surface precision of the external device connected with the bottom plate 101 is solved.

Specifically, as shown in fig. 1 to 8, the base plate 101 is disposed in a sheet shape, and the sheet structure of the base plate 101 can reduce the volume and weight of the entire base plate structure 100, so that the battery module formed by the same can have a high volumetric energy density.

The utility model also provides a battery case, battery case include floor structure 100, lateral wall and top cap, and the top cap passes through the lateral wall to be connected with floor structure 100 to battery case for holding electric core has been formed. Since the bottom plate structure 100 can be more accurately positioned with the external device, the housing structure formed by the bottom plate structure can be more easily positioned with the external device.

The utility model also provides a battery module, battery module include electric core and battery case, and electric core is located battery case's inside, because bottom plate 101 knot can be comparatively accurate with the external equipment location, so the battery module by its formation also can be comparatively easy with the outside establish do not fix a position.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A bottom plate structure for forming a housing of a battery module, comprising:

the bottom plate, the bottom plate is used for supporting electric core, is equipped with a plurality of sunken holes on the bottom plate, the opening direction in sunken hole sets up towards the direction of electric core, the sunken hole includes long section and circular arc section, long section is rectangular sunken setting, the circular arc section is the globular sunken setting of part hollow, the both ends of long section respectively are connected with the circular arc section.

2. The bottom plate structure of claim 1, wherein some of the recessed holes on the bottom plate are arranged in rows, and the recessed holes in different rows are staggered.

3. The bottom plate structure of claim 1, wherein the bottom plate further comprises positioning holes, the positioning holes are arranged along the long side of the bottom plate, and the positioning holes and the recessed holes are staggered.

4. The floor structure according to claim 1, further comprising a first connecting plate and a landing plate, wherein the first connecting plate is connected to the floor at each of two ends along the direction in which the cells are arranged, the first connecting plate extends in the direction of the height of the cells, the landing plate is connected to the other side of the first connecting plate opposite to the floor, the landing plate is connected to the first connecting plate at a predetermined angle, and the landing plate is used for landing on an external device.

5. The floor structure of claim 4, wherein said landing plate and said connecting plate are disposed at 90 degrees.

6. The floor structure according to claim 4, wherein the connection positions of said first connection plate and said landing plate are provided in a row with recesses.

7. The bottom plate structure of claim 1, wherein two ends of the bottom plate in the direction along the length of the battery cell are respectively connected with a supporting plate, the supporting plates are connected with the bottom plate through second connecting plates, and one side of the second connecting plates, which is far away from the bottom plate, is inclined towards the opposite side of the plane of the bottom plate for supporting the battery cell and is connected with the supporting plates.

8. The floor structure of claim 1, wherein said floor is sheet-like in configuration.

9. A battery casing for housing a cell, further comprising a side wall, a top cover and the floor structure of any of claims 1 to 8, the floor structure and the top cover being connected by the side wall.

10. A battery module comprising a cell and the battery housing of claim 9, the cell being located in the battery housing.