CN218101493U - Battery pack and electric vehicle comprising same - Google Patents

Abstract

The utility model relates to a battery technology field specifically provides a battery package and contain electric motor car of this battery package, aims at solving in the current battery package with the help of the fixed electric core of support piece and leads to the not high problem of battery package space utilization. Mesh for this reason, the utility model discloses a battery pack includes box, lid and a plurality of electric core, and the box has the cavity, and the lid is installed on the box, and a plurality of electric cores are located the cavity, and wherein, can set up location structure on the interior diapire of box, perhaps, can set up location structure on the lid, and perhaps again, all can set up location structure on the interior diapire of box and the lid. Through such setting, at least one end is direct and location structure looks adaptation in the self structure at electric core both ends, can make two arbitrary adjacent electric cores closely arrange, and the battery package relies on self structure to fix a position, has left out supporting component, has increased the volume of electric core in the battery package and has accounted for the ratio, has promoted the energy density of battery package.

Description

Battery pack and electric vehicle comprising same

Technical Field

The utility model relates to a battery technology field specifically provides a battery package and contain electric motor car of this battery package.

Background

The new energy automobile takes the battery pack as a power source, wherein under the condition that the energy density of a single battery cell is constant, the number of the battery cells in the unit volume of the battery pack is one of main factors for determining the energy density of the battery pack.

At present, current power battery package comprises a plurality of cylinder electricity cores, and when electric core location was installed in the battery package, often fixed the support component in order to realize the firm support to electric core in the clearance between a plurality of electric cores, the support component not only occupied the partial space of battery package and lead to electric core location compact inadequately, and battery package electricity core accounts for than for a short time, has reduced the energy density of battery package, and user experience is not good.

Accordingly, there is a need in the art for a new battery pack and an electric vehicle including the same to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The battery pack aims to solve or alleviate the problems in the prior art, namely the problem that the energy density of the battery pack is not high due to the fact that the battery core of the existing battery pack is not compact in positioning and installation is solved.

In a first aspect, the present invention provides a battery pack, the battery pack comprising: a case having a chamber; a cover mounted on the case; and a cell located within the chamber; the battery cell structure comprises a box body, a cover body and a plurality of battery cells, wherein the box body is provided with an inner bottom wall and/or the cover body, the box body is provided with a plurality of positioning structures and the battery cells, and the bottom ends of the battery cells and/or the top ends of the battery cells are matched with the positioning structures, so that any two adjacent battery cells are tightly arranged.

In a preferred technical solution of the above battery pack, the battery cell is cylindrical.

In the above preferred technical solution of the battery pack, the positioning structure includes a first positioning structure, the bottom end of the electric core includes a first groove, the first positioning structure is a first boss formed on the inner bottom wall of the case, and the first groove and the first boss are matched with each other.

In a preferred technical solution of the foregoing battery pack, the positioning structure includes a first positioning structure, the bottom end of the electric core includes a second boss, the first positioning structure is a second groove formed on the inner bottom wall of the case, and the second boss and the second groove are matched with each other.

In the above preferred technical solution of the battery pack, the positioning structure includes a second positioning structure, the top end of the battery core includes a positive pole, the second positioning structure is a through hole formed on the cover body, and the positive pole and the through hole are matched with each other.

In the above preferred technical solution of the battery pack, the positioning structures are positioning pillars, the positioning pillars are located around the bottom end structure of the electric core and/or around the top end structure of the electric core, and an included angle between any two adjacent positioning pillars and a line connecting axes of the electric core surrounded by the positioning pillars is 60 degrees or 90 degrees.

In the above preferred embodiment of the battery pack, the cross section of the positioning post is circular.

In the above preferred embodiment of the battery pack, the cross section of the positioning column is polygonal.

In the above preferred technical solution of the battery pack, a side surface of the positioning column has an arc concave surface, and the arc concave surface is matched with an outer side wall of the electric core.

In a second aspect, the present invention provides an electric vehicle, which comprises the above battery pack.

As can be understood by those skilled in the art, the battery pack of the present invention includes a box body, a cover body and a plurality of cells, the box body has a cavity, the cover body is installed on the box body, and the cells are located in the cavity, wherein a positioning structure can be disposed on the inner bottom wall of the box body, or a positioning structure can be disposed on the cover body, or a positioning structure can be disposed on both the inner bottom wall of the box body and the cover body. Through such setting, at least one end is direct and location structure looks adaptation in the self structure at electric core both ends, can make two arbitrary adjacent electric cores closely arrange, and the battery package relies on self structure to fix a position, has left out supporting component, has increased the volume of electric core in the battery package and has accounted for the ratio, has promoted the energy density of battery package.

In the preferred technical scheme of the battery pack, the positioning structures are positioning columns, the positioning columns enclose and block around the bottom end structure of the battery cell and/or around the top end structure of the battery cell, and the included angle between any two adjacent positioning columns and the axis connecting line surrounding the same battery cell is 60 degrees or 90 degrees. Through such setting, a plurality of reference columns evenly distributed centers on and does not influence the inseparable degree of arranging between the adjacent electric core in electric core tip week to increase the steadiness of electric core location, the assembly is simple, and is with low costs.

In the above-mentioned preferred technical scheme of battery package, the side of reference column has the circular arc concave surface, and the circular arc concave surface is mutually supporting with the outside wall of electricity core. Through such setting, when a plurality of reference columns center on fixed electric core, the reference column with the help of the circular arc concave surface increased with the contact surface of electric core lateral wall, further improved the steadiness of electric core location.

Furthermore, the utility model discloses the electric motor car that further provides on above-mentioned technical scheme's basis owing to adopted foretell battery package, therefore possesses the technological effect that above-mentioned battery package possessed, compares in current electric motor car, the utility model discloses an electric core is arranged closely in the battery package of electric motor car, and battery package energy density is high, and user experience is better.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

fig. 1 is a first assembly diagram of a first embodiment of the present invention;

fig. 2 is a second assembly diagram of the first embodiment of the present invention;

fig. 3 is a schematic structural diagram of the battery cell of the present invention;

fig. 4 is a schematic view of a first positional relationship between the battery cell and the positioning column according to a second embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a positional relationship between the battery cell and the positioning column according to a second embodiment of the present invention;

fig. 6 is a schematic cross-sectional structure view of a positioning column according to a second embodiment of the present invention.

List of reference numbers:

1. a box body; 11. a first boss; 12. a second groove; 2. a cover body; 21. a through hole; 3. an electric core; 31. a first groove; 32. a second boss; 33. a positive post; 4. a positioning column; 41. a circular arc concave surface.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. Although the description has been described with reference to cylindrical cells, it is obvious that the invention can be applied to cells of various shapes, for example, square cylindrical cells or rectangular cylindrical cells, etc.

It should be noted that in the description of the present invention, the terms "upper", "top", "bottom", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that a device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The problem that the energy density of a battery pack is not high due to the fact that the battery cell of an existing battery pack is not compact in positioning and installation is pointed out based on the background technology. The utility model provides a battery pack aims at closely arranging through the direct location structure cooperation with battery pack of electric core self structure, promotes battery pack's energy density.

Example one

Specifically, as shown in fig. 1 to fig. 3, the battery pack of the present invention includes a case 1, a cover 2 and a plurality of cells 3, the cover 2 is provided with a plurality of through holes 21 at regular intervals, and the positive post 33 on the top of each cell 3 is inserted into the through hole 21, so as to position the top of each cell 3 on the cover 2.

With reference to fig. 1 and fig. 3, in a preferred case, when the bottom end of the battery cell 3 has a positioning structure of the first groove 31, a plurality of first bosses 11 are uniformly arranged on the inner bottom wall of the case 1 at intervals, and positions of the plurality of first bosses 11 correspond to positions of the plurality of through holes 21 on the cover 2 one by one. In the assembled state, the first groove 31 at the bottom end of the battery cell 3 and the first boss 11 of the case 1 are matched with each other to position the bottom end of the battery cell 3 on the case 1.

With continued reference to fig. 2 and fig. 3, in another preferred case, when the bottom end of the battery cell 3 has a positioning structure of the second boss 32, a plurality of second grooves 12 are uniformly provided at intervals on the inner bottom wall of the box body 1, and the positions of the plurality of second grooves 12 correspond to the positions of the plurality of through holes 21 on the cover body 2 one by one. In an assembled state, the second boss 32 at the bottom end of the battery cell 3 and the second groove 12 of the case 1 cooperate with each other to position the bottom end of the battery cell 3 on the case 1.

It should be noted that, gaps between a plurality of adjacent electric cores 3 may be adjusted according to actual needs, and when the center distances of the two adjacent first grooves 31, the two second bosses 32, and the two through holes 21 are all set to be the same as the diameters of the electric cores 3, the plurality of electric cores 3 may be tightly arranged in the battery pack in a tangent state, so that the volume ratio of the electric cores 3 in the battery pack is greatly increased.

Example two

Specifically, as shown in fig. 4 to fig. 6, the battery pack of the present invention includes a case 1, a cover 2 and a plurality of battery cells 3, and a plurality of cylindrical positioning pillars 4 are disposed on the inner top wall of the cover 2 and the inner bottom wall of the case 1.

With reference to fig. 4, in a preferred case, when the positioning pillars 4 are arranged in a hexagonal matrix, every six positioning pillars 4 on the cover 2 form a group around the top end of the same electrical core 3, and every six positioning pillars 4 on the box 1 form a group around the bottom end of the same electrical core 3. The included angle between any two adjacent positioning columns 4 on the cover body 2 and the box body 1 and the axis connecting line of the same surrounding battery cell 3 is 60 degrees. After the plurality of battery cells 3 are closely and tangentially positioned and arranged according to the arrangement mode of the positioning columns 4, each positioning column 4 is closely surrounded and abutted by three battery cells 3. On the other hand, every three mutually adjacent battery cells 3 surround a gap space forming a triangle, and the positioning columns 4 are located in the gap space and tightly abut against the three surrounding battery cells 3.

With reference to fig. 5, in another preferred case, when the positioning pillars 4 are arranged in a square matrix, every four positioning pillars 4 on the cover 2 form a group and surround the top end of the same electrical core 3, and every four positioning pillars 4 on the box 1 form a group and surround the bottom end of the same electrical core 3. The included angle between any two adjacent positioning columns 4 on the cover body 2 and the box body 1 and the axis connecting line of the same electric core 3 around the positioning columns is 90 degrees. After the plurality of battery cells 3 are closely and tangentially positioned and arranged according to the arrangement mode of the positioning columns 4, each positioning column 4 is closely surrounded and abutted by four battery cells 3. On the other hand, every four mutually adjacent battery cells 3 surround a gap space forming a parallelogram, and the positioning columns 4 are located in the gap space and tightly abut against the four surrounding battery cells 3.

With reference to fig. 6, when the positioning pillars 4 are arranged in a square matrix, the side surfaces of the positioning pillars 4 have four arc concave surfaces 41, and the four arc concave surfaces 41 can be adapted to the outer side walls of the four surrounding battery cells 3. Reference column 4 has increased the contact surface with electric core 3 lateral wall with the help of circular arc concave surface 41, avoids electric core 3 slippage from between reference column 4, has further improved the steadiness of electric core 3 location.

It should be noted that, can set up the bump in the circular arc concave 41 of reference column 4, the skid resistant course is in order to increase the frictional force between reference column 4 and the electric core 3 surface, and this kind is not skew to adjustment and the change of the surface fit mode between reference column 4 and the electric core 3 the utility model discloses a principle, consequently all will fall into within the protection scope of the utility model.

In addition, the end portions of the positioning columns 4 are provided with chamfers (not shown in the figure), the end portions of the battery cells can be conveniently and smoothly inserted into a group of positioning structures formed by surrounding every four or six positioning columns 4 along the chamfers of the positioning columns 4, and therefore the convenience of installing the battery cells 3 between the positioning columns 4 is improved, and further the installation efficiency of the battery cells in the battery pack is improved.

It should be noted that, although the above-described guiding structure of the positioning column 4 is introduced in a chamfering manner, the protection scope of the present invention is not limited to the above-described situation, according to the practical application, the guiding structure of the end portion of the positioning column 4 can be set to be a conical structure, or the guiding structure of the end portion of the positioning column 4 can also be set to be a hemispherical structure, or the guiding structure of the end portion of the positioning column 4 can also be set to be a polygonal conical structure composed of a plurality of inclined planes, and the like, and the adjustment and change of the guiding structure of the end portion of the positioning column 4 do not deviate from the principle of the present invention, and therefore all fall into the protection scope of the present invention.

It should be noted that, although the above-mentioned plurality of battery cells 3 are described as being arranged in a tangential manner, the scope of the present invention is not limited to the above-mentioned case, and the size of the gap between the plurality of battery cells 3 can be adjusted by the diameter of the positioning column 4 according to the practical application.

Furthermore, although the positioning structure of the box 1 and the cover 2 is described as the circular positioning column 4, this is not restrictive, and those skilled in the art may use other shapes of positioning column 4 to position the electric core 3 without departing from the principles of the present invention. For example, according to the gap space structure between the arrangement structures of the battery cells 3, the positioning columns 4 can adopt triangular positioning columns 4, or can also adopt square or regular octagonal positioning columns 4, and the like, so that the structural strength of the positioning columns 4 is improved by increasing the volume of the positioning columns 4 in the gap space.

Although the cover 2 and the box 1 described in the second embodiment are both in the case of positioning and matching the electric core 3 with the positioning column 4, the protection scope of the present invention is not limited to the above case, and those skilled in the art can also make adjustments to the specific forms of the positioning structures of the cover 2 and the box 1 and the matching manner therebetween without departing from the principles of the present invention. For example, set up a plurality of reference columns 4 on lid 2, set up a plurality of first bosss 11 on the diapire in the box 1, every four reference columns 4 on the lid 2 are a set of and box 1 on a first boss 11 set up relatively, under the state of assembling, every four reference columns 4 center on same electric core 3 around to the top cooperation location of electric core 3, first boss 11 on the box 1 and the first recess 31 of the bottom of this electric core 3 cooperate the location each other, or, set up a plurality of reference columns 4 on the diapire in the box 1, be equipped with a plurality of through-holes 21 on the lid 2, every six reference columns 4 on the diapire in the box 1 set up for a set of and lid 2 on a through-hole 21 relatively, under the state of assembling, every six reference columns 4 center on same electric core 3 around to the bottom cooperation location of electric core 3, this kind of positive post 33 on 3 tops cooperates the location with a through-hole 21 on the lid 2, this kind of adjustment and change to the concrete form of the location structure of lid 2 and the cooperation mode of box 1 do not deviate from the utility model, consequently, all will fall into the protection scope of the utility model.

In addition, it should be further noted that, regarding the description of the positioning structure, although the positioning structures are simultaneously arranged on the box body and the cover body to position and arrange the battery cells in the above embodiment, as in the first embodiment, the two ends of the battery cells are simultaneously positioned and arranged with the first positioning structure (the first boss 11 or the second groove 12) and the second positioning structure (the through hole 21), the protection scope of the present invention is not limited to the above situation, and according to practical applications, the positioning structures can also be only arranged on the box body or the cover body, and only one end of the battery cells need to be closely arranged according to the positioning structures.

Finally, the utility model also provides an electric motor car, this electric motor car includes foretell battery package.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions can be made on the related technical features by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions will fall into the protection scope of the invention.

Claims (10)

1. A battery pack, comprising:

a case having a chamber;

a cover mounted on the case; and

a cell located within the chamber;

the battery cell box comprises a box body, a cover body and a battery cell, wherein a positioning structure is arranged on the inner bottom wall of the box body and/or the cover body, the number of the positioning structures and the number of the battery cells are multiple, and the bottom end of the battery cell and/or the top end of the battery cell are matched with the positioning structures, so that any two adjacent battery cells are tightly arranged.

2. The battery pack of claim 1, wherein the cells are cylindrical.

3. The battery pack of claim 2, wherein the positioning structure comprises a first positioning structure, the bottom end of the battery cell comprises a first groove, the first positioning structure is a first boss formed on the inner bottom wall of the box body, and the first groove and the first boss are matched with each other.

4. The battery pack of claim 2, wherein the positioning structure comprises a first positioning structure, the bottom end of the battery cell comprises a second boss, the first positioning structure is a second groove formed on the inner bottom wall of the box body, and the second boss and the second groove are matched with each other.

5. The battery pack of claim 2, wherein the positioning structure comprises a second positioning structure, the top end of the battery cell comprises a positive post, the second positioning structure is a through hole formed on the cover body, and the positive post and the through hole are matched with each other.

6. The battery pack according to claim 2, wherein the positioning structures are positioning posts, a plurality of the positioning posts are enclosed around the bottom end structure of the electric core and/or around the top end structure of the electric core, and an included angle between a connecting line of the axis of any two adjacent positioning posts and the electric core surrounded by the positioning posts is 60 degrees or 90 degrees.

7. The battery pack of claim 6, wherein the positioning posts are circular in cross-section.

8. The battery pack of claim 6, wherein the positioning posts are polygonal in cross-section.

9. The battery pack according to claim 6, wherein the side of the positioning post has a concave arc surface, and the concave arc surface is matched with the outer side wall of the battery cell.

10. An electric vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.

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