CN221009037U - Battery pack and unmanned aerial vehicle - Google Patents

Abstract

The application discloses a battery pack and an unmanned aerial vehicle; the battery pack includes: the battery cell module comprises a plurality of battery cell units which are arranged in parallel; the battery cell unit comprises a battery cell monomer and a battery cell bracket for supporting the battery cell monomer; the surrounding wall of the battery cell bracket comprises a first heat conduction part; the lower shell is used for accommodating the battery cell module; the surrounding wall of the lower shell comprises a second heat conduction part; the first heat conduction part is in fit contact with the second heat conduction part. According to the battery, the battery core bracket and the lower shell form a heat dissipation structure of the battery core module, so that the problem that the battery bag is occupied by an additional heat dissipation structural member is solved; the contact area between the battery cell bracket and the battery cell monomer is large, so that the heat dissipation area of the battery cell module is effectively ensured; the first heat conduction part and the second heat conduction part are closely attached and contacted, and heat generated by the battery cell module is directly dissipated to the outside through the first heat conduction part and the second heat conduction part, so that a heat dissipation path is shortened, and a heat dissipation effect is effectively ensured.

Description

Battery pack and unmanned aerial vehicle

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack; and also relates to an unmanned aerial vehicle comprising the battery pack.

Background

The heat generated by the battery core module needs to be dissipated to the outside of the shell of the battery pack in the working process of the battery pack so as to ensure the service performance of the battery pack. In the prior art, a heat-radiating cover plate is arranged above the battery cell module, and heat is radiated through a heat transfer path formed by the electrode lugs, the bus bars, the heat-conducting gel and the heat-radiating cover plate; the size of the battery pack is increased due to the heat-conducting gel and the heat-radiating cover plate, and the formed heat-radiating path is longer, so that the quick heat radiation of the battery cell module is not facilitated.

Disclosure of utility model

In view of the above, the present application provides a battery pack, and also provides an unmanned aerial vehicle including the battery pack; the heat dissipation structure solves the problems that the heat dissipation structure increases the size of the battery pack and the heat dissipation path is longer.

In order to achieve the above purpose, the present application provides the following technical solutions:

a battery pack, comprising:

The battery cell module comprises a plurality of battery cell units which are arranged in parallel; the battery cell unit comprises a battery cell monomer and a battery cell bracket for supporting the battery cell monomer; the surrounding wall of the battery cell bracket comprises a first heat conduction part;

The lower shell is used for accommodating the battery cell module; the surrounding wall of the lower shell comprises a second heat conduction part;

the first heat conduction part is in fit contact with the second heat conduction part.

Optionally, in the above battery pack, the peripheral wall of the lower case includes a bottom wall connected in a split manner and a plurality of side walls sequentially disposed at edges of the bottom wall;

wherein the bottom wall and/or at least one of the side walls forms the second heat conducting portion.

Optionally, in the above battery pack, the side wall includes a first side wall and a second side wall that are adjacent to each other;

A side part of the first side wall adjacent to the second side wall forms a first connecting part; a first mounting hole is formed in the first connecting part;

A second connecting part is formed on the side part of the second side wall adjacent to the first side wall; the second connecting part is parallel to the first connecting part, and a second mounting hole is formed in the second connecting part;

The first fastener sequentially passes through the second mounting hole and the first mounting hole so as to fixedly connect the second side wall with the first side wall.

Alternatively, in the above-described battery pack,

The first connecting part is a column structure formed on the side part of the first side wall; a third mounting hole is formed in the bottom of the upright post structure;

a fourth mounting hole is formed in the corner position of the bottom wall;

The second fastening piece sequentially passes through the fourth mounting hole and the third mounting hole so as to fixedly connect the bottom wall with the first side wall.

Alternatively, in the above-described battery pack,

The corners of the lower surface of the bottom wall are provided with supporting feet;

and/or the number of the groups of groups,

A first guard plate extending upwards is formed at the corner of the upper surface of the bottom wall; the first guard board encloses the edges and corners of the bottoms of the joints of the two adjacent side walls.

Optionally, in the above battery pack, the battery pack includes an upper cover and a battery cell bracket;

a fifth mounting hole is formed in the corner position of the upper cover;

A sixth mounting hole is formed in the corner of the battery cell bracket;

a seventh mounting hole is formed in the corner position of the top of the lower shell;

And the third fastening piece sequentially passes through the fifth mounting hole, the sixth mounting hole and the seventh mounting hole so as to fixedly connect the upper cover, the battery cell bracket and the lower shell.

Optionally, in the above battery pack, a second guard plate extending downward is formed at a corner of the upper cover or the battery cell bracket; the second guard plate encloses the edges and corners at the top of the lower housing.

Optionally, in the above battery pack, a plurality of sealing strips arranged in parallel are formed on the periphery of the battery cell bracket;

the battery cell support is located in the upper cover and is in sealing abutting connection with the upper cover through the sealing strips.

Optionally, in the above battery pack, the battery cell support and the plurality of sealing strips are of an injection molding integrated structure.

A drone comprising a battery pack as described above.

In the battery pack and the unmanned aerial vehicle provided by the application, the surrounding wall of the battery cell bracket comprises a first heat conduction part, and the surrounding wall of the lower shell comprises a second heat conduction part, namely the battery cell bracket and the lower shell are made of materials capable of conducting heat; as above, the battery cell bracket and the lower shell form a heat dissipation structure of the battery cell module, so that the problem that the energy density of the battery pack is influenced due to the fact that the battery pack is occupied by additionally arranging a heat dissipation structural member is avoided; the contact area between the battery cell bracket and the battery cell monomer is large, so that the heat dissipation area of the battery cell module is effectively ensured; the first heat conduction part and the second heat conduction part are closely attached and contacted, and heat generated by the battery cell module is directly dissipated to the outside through the first heat conduction part and the second heat conduction part, so that a heat dissipation path is shortened, and a heat dissipation effect is effectively ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a battery pack according to the present application;

Fig. 2 is an exploded view of the battery pack of the present application;

fig. 3 is another exploded view of the battery pack of the present application;

fig. 4 is a schematic structural diagram of a cell unit according to the present application;

FIG. 5 is a top view of the lower housing of the present application;

fig. 6 is a schematic structural diagram of the cell holder and the upper case of the present application;

fig. 7 is a schematic structural view of a cell holder according to the present application;

FIG. 8 is a cross-sectional view A-A of FIG. 7;

FIG. 9 is an enlarged partial view of region C of FIG. 8;

fig. 10 is an assembly view of the cell holder and the upper case of the present application;

fig. 11 is a B-B cross-sectional view of fig. 10.

In fig. 1-11:

1. A battery cell module; 2. a lower housing; 3. a first fastener; 4. a second fastener; 5. an upper cover; 6. a cell holder; 7. a third fastener; 8. a sealing strip;

11. a cell unit; 12. a cell holder;

51. A second guard plate;

21. a bottom wall; 22. a first sidewall; 23. a second sidewall; 24. a second heat conduction part;

121. A first heat conduction part;

211. Supporting feet; 212. a first guard plate;

221. A first connection portion;

231. and a second connecting part.

Detailed Description

The application provides a battery pack and an unmanned aerial vehicle comprising the battery pack.

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 11, a battery pack includes a battery cell module 1 and a lower case 2. The cell module comprises a plurality of cell units which are arranged in parallel; the cell unit comprises a cell unit 11 and a cell bracket 12. The cell bracket 12 accommodates the cell unit 11 and supports and fixes the cell unit 11. The surrounding wall of the cell carrier 12 includes a first thermally conductive portion 121. The lower shell 2 is used for accommodating the cell module 1; the surrounding wall of the lower housing 2 includes a second heat conducting portion 24. The first heat conduction part 121 and the second heat conduction part 24 are in no gap, so that the first heat conduction part 121 and the second heat conduction part 24 are in close contact.

It should be noted that, the first heat conducting portion 121 and a component wall in the surrounding wall of the battery cell bracket 12 may be an integral component, that is, the component wall of the battery cell bracket 12 integrally forms the first heat conducting portion 121; or at least a partial region of the constituent walls of the cell carrier 12 forms the first heat conduction portion 121. The first heat conducting part 121 and the component wall in the surrounding wall of the battery cell bracket 12 may also be a split type component, that is, the first heat conducting part 121 is embedded in the component wall of the battery cell bracket 12.

The second heat conduction portion 24 may be an integral member with a constituent wall in the surrounding wall of the lower case 2, that is, the constituent wall of the lower case 2 integrally forms the second heat conduction portion 24; or at least a partial region of the constituent wall of the lower case 2 forms the second heat conduction portion 24. The second heat conducting portion 24 and the constituent wall in the surrounding wall of the lower case 2 may also be a separate member, i.e., the second heat conducting portion 24 is embedded in the constituent wall of the lower case 2.

Preferably, the cell carrier 12 is of U-shaped configuration; the U-shaped structure is provided with a bottom surface and two side surfaces with opposite positions; the bottom surface of the battery cell bracket 12 is formed with a first heat conduction part 121; the first heat conduction part 121 is formed at both side surfaces of the cell holder 12. The component wall of the lower housing 2 opposite to the bottom surface of the cell bracket 12 is formed with a second heat conduction portion 24; the side surfaces of the parallel arranged cell holders 12 form a joint surface, and the component wall of the lower case 2 opposite to the joint surface is also formed with a second heat conduction portion 24.

Further, the first heat conducting part 121 and the second heat conducting part 24 are made of materials capable of conducting heat; preferably, a metal material is selected.

Furthermore, the whole battery cell bracket 12 and the whole lower shell 2 are made of materials capable of conducting heat; preferably, a metal material is selected.

The battery cell bracket 12 comprises a plurality of first heat conducting parts 121, and the lower shell 2 comprises a plurality of second heat conducting parts 24; as described above, the battery cell bracket 12 and the lower housing 2 form a heat dissipation structure of the battery cell module 1, which avoids the problem that the energy density of the battery pack is affected due to the fact that the battery pack is occupied by the additional heat dissipation structural member. The contact area between the battery cell bracket 12 and the battery cell monomer 11 is large, so that the heat dissipation area of the battery cell module 1 is effectively ensured. There is no gap between the first heat conduction part 121 and the second heat conduction part 24, and the first heat conduction part 121 and the second heat conduction part 24 are in fit contact, so that heat generated by the cell module 1 is directly dissipated to the outside through the first heat conduction part 121 and the second heat conduction part 24, a heat dissipation path is shortened, and a heat dissipation effect is effectively ensured.

In some embodiments, the sides of the cell carrier 12 have a length dimension along the thickness of the cell 11; the ratio of the length dimension of the side of the cell carrier 12 to the thickness dimension of the cell 11 is 0.9-1.1. Preferably, when the battery cell 11 is placed in the battery cell holder 12, the battery cell 11 does not protrude beyond the side surface of the battery cell holder 12 and is flush with the side surface of the battery cell holder 12, i.e., the ratio of the length dimension of the side surface of the battery cell holder 12 to the thickness dimension of the battery cell 11 is 1.

Referring to fig. 3, in some embodiments of the present application, the surrounding wall of the lower housing 2 includes a bottom wall 21 connected in a split manner and a plurality of side walls disposed in sequence at the edges of the bottom wall 21. Wherein the bottom wall 21 and/or at least one of the side walls forms a second heat conducting portion 24.

The split connection means that before the lower case 2 is not assembled, the bottom wall 21 and each side wall in the surrounding wall of the lower case 2 are of independent plate-like structure; when assembly is required, the bottom wall 21 and the plurality of side walls are spliced together again to form a wall to form the unitary structure of the lower housing 2.

The cell modules 1 are assembled and placed on the bottom wall 21, and then each side wall is assembled in turn. As above, the assembly gap between the battery cell bracket 12 and the side wall of the lower shell 2 can be accurately controlled, so that no gap distance exists between the battery cell bracket 12 and the lower shell 2, the close fitting contact effect of the first heat conduction part 121 and the second heat conduction part 24 is effectively ensured, and the heat dissipation effect of the battery cell module 1 is ensured.

The side wall is provided with a reinforcing rib to strengthen the strength of the battery pack.

In some embodiments of the application, the sidewalls include first 22 and second 23 sidewalls that are positioned adjacent. The side of the first sidewall 22 adjacent to the second sidewall 23 forms a first connection portion 221; the first connection portion 221 is provided with a first mounting hole. The side of the second sidewall 23 adjacent to the first sidewall 22 forms a second connection portion 231; the second connection portion 231 is parallel to the first connection portion 221, and a second mounting hole is formed in the second connection portion 231. The first fastener 3 sequentially passes through the second mounting hole and the first mounting hole to fixedly connect the second side wall 23 with the first side wall 22.

It should be noted that, the lower housing 2 has a rectangular parallelepiped structure with an opening at the top; the lower housing 2 includes two first side walls 22 located opposite each other and two second side walls 23 located opposite each other. Two first connection portions 221 are formed at both sides of the first sidewall 22, respectively; two second connection portions 231 are respectively formed at both sides of the second sidewall 23.

It should be further noted that the first side wall 22 is formed with a second heat conducting portion 24; the second side wall 23 is also formed with a second heat conduction portion 24. Further, the first side wall 22 integrally forms a second heat conducting portion 24; the second side wall 23 integrally forms a second heat conduction portion 24.

A plurality of first mounting holes are provided on the first connection part 221 at intervals in the height direction; the second connection portion 231 is provided with a plurality of second mounting holes spaced apart in the height direction.

When the lower housing 2 is assembled, two opposite first side walls 22 are fixed on the bottom wall 21, and then the second side walls 23 are assembled on two sides of the two first side walls 22. The first connecting part 221 of the assembled first side wall 22 and the second connecting part 231 of the second side wall 23 are parallel and aligned and attached together, and the first mounting hole and the second mounting hole are opposite; at this time, the connection fixation of the first side wall 22 and the second side wall 23 can be achieved by the first fastener 3 alone.

As above, the first side wall 22 and the second side wall 23 are conveniently, quickly and detachably installed and fixed, the assembly time is shortened, and the working efficiency is improved.

Referring to fig. 3, in some embodiments of the present application, the first connection portion 221 is a pillar structure formed on a side portion of the first sidewall 22; and a third mounting hole is formed in the bottom of the upright post structure. A fourth mounting hole is formed in a corner of the bottom wall 21. The second fastener 4 sequentially passes through the fourth mounting hole and the third mounting hole to fixedly connect the bottom wall 21 with the first side wall 22.

It should be noted that, a mounting hole is formed on a side surface parallel to the second connection portion 231 in the upright post structure. The first connection portion 221 of the upright structure provides enough installation space for connecting the second connection portion 231 and fixing on the bottom wall 21, and has a simple structure, is convenient for production and processing, and is more convenient and rapid to assemble and assemble.

Referring to fig. 1 and 5, in some embodiments of the present application, support feet 211 are formed at corners of the lower surface of the bottom wall 21.

Wherein, the bottom wall 21 is a rectangular plate structure; four corner positions of the bottom wall 21 are provided with supporting feet 211.

It should be further noted that the fourth mounting hole is formed in the support foot 211.

By providing the support feet 211, not only is the support strength improved, but also the mounting and fixing of the battery pack are facilitated, and the abrasion consumption of the bottom wall 21 is avoided.

Referring to fig. 1, further, a first guard 212 extending upward is formed at a corner of the upper surface of the bottom wall 21; the first guard 212 encloses the corners of the bottom where the first sidewall 22 and the second sidewall 23 are joined.

It should be noted that the first guard plate 212 has an arc-shaped structure. As above, the risk of puncturing and scratching the human body caused by sharp points of the edges formed by the battery pack is effectively reduced, and a good protection effect is achieved.

Referring to fig. 2, 6-8 and 10-11, in some embodiments of the application, the battery pack includes an upper cover 5 and a cell holder 6. The four corners of the upper cover 5 are provided with fifth mounting holes. And the four corners of the battery cell bracket 6 are provided with sixth mounting holes. A seventh mounting hole is formed at the top of the first connection part 221 of the pillar structure to form four seventh mounting holes at four corners of the top of the lower case 2. The third fastening piece 7 sequentially passes through the fifth mounting hole, the sixth mounting hole and the seventh mounting hole so as to fixedly connect the upper cover 5, the battery cell bracket 6 and the lower shell 2.

The upper cover 5, the battery cell bracket 6 and the lower shell 2 are provided with mounting holes at opposite positions respectively, and the three are conveniently, rapidly and detachably mounted and fixed through fasteners, so that the battery pack is convenient to assemble and fix, and replacement and maintenance are realized.

Referring to fig. 1, in some embodiments of the present application, a second guard plate 51 extending downward is formed at a corner of the upper cover 5 or the cell holder 6; the second guard 51 encloses the corners of the top of the lower housing 2.

It should be noted that the second guard plate 51 has an arc-shaped structure. As above, the risk of puncturing and scratching the human body caused by sharp points of the edges formed by the battery pack is effectively reduced, and a good protection effect is achieved.

Referring to fig. 7-11, in some embodiments of the present application, a plurality of sealing strips 8 are formed on the outer periphery of the cell holder 6 in a side-by-side arrangement. The battery cell bracket 6 is positioned in the upper cover 5 and is in sealing abutting joint with the upper cover 5 through a plurality of sealing strips 8.

It should be noted that the sealing strip 8 has a ring-shaped structure.

The sealing strips form a plurality of sealing protection lines between the battery cell bracket 6 and the upper cover 5, so that the sealing connection of the battery cell bracket 6 and the upper cover is more reliable.

Preferably, two sealing strips 8 are arranged at intervals up and down.

In some embodiments of the present application, the cell support 6 and the plurality of sealing strips 8 are of an injection molded integral structure.

It should be noted that the injection molding integrated structure refers to that the cell support 6 is obtained by injection molding, and then the cell support 6 is placed in an injection molding mold of the sealing strip 8, so that the injection molding integrated structure of the sealing strip 8 and the cell support 6 is finally formed.

As above, the accurate positioning of the sealing strip 8 on the cell support 6 is realized, and the sealing strip 8 cannot be separated from the cell support 6, so that the assembly sealing effect of the battery pack is ensured.

In summary, the application also provides an unmanned aerial vehicle; the drone includes a battery pack as described above.

Because the unmanned aerial vehicle of the application comprises the battery pack, the beneficial effects brought by the battery pack by the unmanned aerial vehicle are referred to above, and are not repeated here.

The components, arrangements, etc. referred to in this disclosure are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the drawings. These components, devices, may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It should also be noted that in the device of the present application, the components may be disassembled and/or reassembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is to be construed as including any modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (10)

1. A battery pack, comprising:

The cell module (1) comprises a plurality of cell units which are arranged in parallel; the battery cell unit comprises a battery cell monomer (11) and a battery cell bracket (12) for supporting the battery cell monomer (11); the surrounding wall of the battery cell bracket (12) comprises a first heat conduction part (121);

A lower housing (2) for accommodating the cell module (1); the surrounding wall of the lower shell (2) comprises a second heat conducting part (24);

Wherein the first heat conduction part (121) is in contact with the second heat conduction part (24).

2. The battery pack according to claim 1, wherein the surrounding wall of the lower case (2) includes a bottom wall (21) connected separately and a plurality of side walls provided in sequence at the edges of the bottom wall (21);

Wherein the bottom wall (21) and/or at least one of the side walls forms the second heat conducting part (24).

3. The battery pack according to claim 2, wherein the side walls comprise a first side wall (22) and a second side wall (23) positioned adjacent to each other;

A first connecting part (221) is formed on the side part of the first side wall (22) adjacent to the second side wall (23); a first mounting hole is formed in the first connecting part (221);

A second connecting part (231) is formed on the side part of the second side wall (23) adjacent to the first side wall (22); the second connecting part (231) is parallel to the first connecting part (221), and a second mounting hole is formed in the second connecting part (231);

the first fastener (3) sequentially passes through the second mounting hole and the first mounting hole so as to fixedly connect the second side wall (23) with the first side wall (22).

4. The battery pack of claim 3, wherein the battery pack comprises a plurality of battery cells,

The first connecting part (221) is a column structure formed on the side part of the first side wall (22); a third mounting hole is formed in the bottom of the upright post structure;

a fourth mounting hole is formed in the corner position of the bottom wall (21);

The second fastening piece (4) sequentially passes through the fourth mounting hole and the third mounting hole so as to fixedly connect the bottom wall (21) with the first side wall (22).

5. The battery pack of claim 2, wherein the battery pack comprises a plurality of battery cells,

A supporting foot (211) is formed at the corner of the lower surface of the bottom wall (21);

and/or the number of the groups of groups,

A first guard plate (212) extending upwards is formed at the corner of the upper surface of the bottom wall (21); the first guard plate (212) encloses the corner angle of the bottom of the junction of two adjacent side walls.

6. The battery pack according to claim 1, wherein the battery pack comprises an upper cover (5) and a cell holder (6);

A fifth mounting hole is formed in the corner of the upper cover (5);

A sixth mounting hole is formed in the corner of the battery cell bracket (6);

A seventh mounting hole is formed in the corner position of the top of the lower shell (2);

The third fastening piece (7) sequentially penetrates through the fifth mounting hole, the sixth mounting hole and the seventh mounting hole, so that the upper cover (5), the battery cell support (6) and the lower shell (2) are fixedly connected.

7. The battery pack according to claim 6, wherein the upper cover (5) or the cell holder (6) is formed at a corner thereof with a second guard plate (51) extending downward; the second guard plate (51) encloses the corner angle at the top of the lower shell (2).

8. The battery pack according to claim 6, wherein a plurality of sealing strips (8) arranged in parallel are formed on the periphery of the cell holder (6);

The battery cell support (6) is located in the upper cover (5) and is in sealing abutting connection with the upper cover (5) through the sealing strips (8).

9. The battery pack according to claim 8, wherein the cell holder (6) and the plurality of sealing strips (8) are of an injection-molded integral structure.

10. A drone comprising a battery pack according to any one of claims 1 to 9.