CN215680865U

CN215680865U - Battery package box, battery package and vehicle

Info

Publication number: CN215680865U
Application number: CN202120759797.9U
Authority: CN
Inventors: 郭军
Original assignee: Beijing CHJ Automotive Information Technology Co Ltd
Current assignee: Beijing CHJ Automotive Information Technology Co Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2022-01-28
Anticipated expiration: 2031-04-14

Abstract

The utility model relates to a battery pack box, a battery pack and a vehicle, wherein the box comprises: the frame assembly is provided with a containing cavity capable of containing the battery core; the protective bottom plate is arranged on one side which is deviated from the bottom of the accommodating cavity; and the fixing structure comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with the frame assembly, and the second connecting piece is matched with the first connecting piece so as to detachably connect the protective bottom plate with the frame assembly. The fixed structure can be set as a fastener connection or clamping structure, the protection bottom plate is fixed on the frame assembly through the fixed structure, the detachable connection of the protection bottom plate and the frame assembly is realized, the protection of the frame assembly is realized through the protection bottom plate, even if a vehicle slightly drags a bottom accident, the protection bottom plate can be directly replaced, the whole box body does not need to be replaced, and the maintenance cost caused by the accident is reduced.

Description

Battery package box, battery package and vehicle

Technical Field

The utility model relates to the technical field of automobile manufacturing, in particular to a battery pack box body, a battery pack and a vehicle.

Background

In the existing design scheme of the battery pack, the lower box body structure is mostly in an integrated mode of a box body frame and a bottom plate, and the process is that an aluminum alloy extruded section is welded into the box body frame in a splicing mode and then welded with the bottom plate into the integrated lower box body. Even if not injuring electric core module at the end of taking place the vehicle slightly, whole battery package just judges the inefficacy this moment, need change the lower box of whole battery package, and all modules need be disassembled in the change process, and is electric, all internals such as BMS waste time and energy again, increase cost of maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a battery pack box body, a battery pack and a vehicle.

According to a specific embodiment of the present invention, in a first aspect, the present invention provides a battery pack case, including: the frame assembly is provided with a containing cavity capable of containing the battery core; the protective bottom plate is arranged on one side which is deviated from the bottom of the accommodating cavity; and the fixing structure comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with the frame assembly, and the second connecting piece is matched with the first connecting piece so as to detachably connect the protective bottom plate with the frame assembly.

Preferably, a plurality of through holes are arranged in the protective bottom plate at intervals, the through holes are arranged in parallel to the plate surface of the protective bottom plate, and a support body for supporting the two plate surfaces of the protective bottom plate which are oppositely arranged is formed between every two adjacent through holes; and/or, the protection bottom plate is a plurality of, every the relative both ends of protection bottom plate set up respectively into concave groove and with concave groove assorted convex body, adjacent between the protection bottom plate through concave groove with the convex body is connected.

Preferably, an adhesive layer is arranged between the concave groove and the convex body, and the adhesive layer is used for connecting and fixing the concave groove and the convex body.

Preferably, the cross section of the convex body is trapezoidal, the longitudinal section of the convex body is rectangular, the lower bottom of the trapezoidal body is connected with the protection bottom plate, and the longitudinal section area of the convex body gradually decreases along the direction from the lower bottom of the trapezoidal body to the upper bottom of the trapezoidal body.

Preferably, the frame assembly comprises a liquid cooling plate and edge beams arranged on the peripheral edge of the liquid cooling plate, and the liquid cooling plate and the edge beams enclose to form the accommodating cavity; the first connecting piece is fixedly connected with the liquid cooling plate.

Preferably, the frame assembly further comprises a sealing member, wherein the sealing member is arranged between the edge beam and the liquid cooling plate, so that the edge beam is in sealing connection with the liquid cooling plate.

Preferably, the battery pack box further comprises a bracket, and the bracket is arranged between the protective bottom plate and the liquid cooling plate, so that a gap is formed between the protective bottom plate and the liquid cooling plate; the support corresponds to the first connecting piece in position, and the second connecting piece penetrates through the support and is fixedly connected with the first connecting piece.

Preferably, the first connecting piece is a rivet nut, and the second connecting piece is a screw; the rivet nut is riveted on the liquid cooling plate and is in sealing connection with the liquid cooling plate, two ends of the support are respectively tightly abutted to the rivet nut and the protective bottom plate, the screw is sunk into the through hole, and the screw is connected with the rivet nut so that the frame assembly and the protective bottom plate are relatively fixed.

Preferably, the frame assembly further comprises a cross beam, the cross beam is arranged in the accommodating cavity, and the cross beam divides the accommodating cavity into a plurality of accommodating spaces; the beam comprises a first plate and a second plate, the first plate and the second plate are arranged at intervals, reinforcing ribs are arranged between the first plate and the second plate, and the first connecting piece is located in a space between the first plate and the second plate.

According to a second aspect of the present invention, there is provided a battery pack, including the battery pack case, the battery pack case having a receiving cavity and a battery core disposed in the receiving cavity.

According to a third aspect of the present invention, there is provided a vehicle including the battery pack.

The technical scheme of the utility model has the following advantages:

1. according to the battery pack box body provided by the utility model, the protective bottom plate is fixed on the frame assembly through the fixing structure, the fixing structure comprises the first connecting piece and the second connecting piece, the first connecting piece is fixedly connected with the frame assembly, and the second connecting piece is matched with the first connecting piece, so that the detachable connection of the protective bottom plate and the frame assembly is realized.

2. According to the battery pack box body, the protective bottom plate is of a hollow structure, so that the protective bottom plate can be designed in a light weight mode, the protective bottom plate is made of glass fibers or carbon fibers, the weight of the battery pack box body can be reduced, the weight reduction and specific energy improvement are realized, and the driving range of a whole vehicle is increased.

3. According to the battery pack box body provided by the utility model, the support is arranged between the protective bottom plate and the frame assembly, and a gap is formed between the protective bottom plate and the frame assembly; when the protective bottom plate is stressed, the buffer can be formed, the impact on the frame assembly is reduced, and the damage to the frame assembly is reduced; the box body is maintained by replacing the protective bottom plate, so that the maintenance cost of the box body is reduced; the rivet nut is riveted on the liquid cooling plate, so that a threaded connection point can be provided when the protective bottom plate is subsequently replaced, the replacement is easy, and the replacement of the protective bottom plate can be quickly realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a battery pack case provided by the present invention;

FIG. 2 is a schematic structural view of a frame assembly;

FIG. 3 is a cross-sectional view A-A shown in FIG. 2;

FIG. 4 is a cross-sectional view B-B shown in FIG. 2;

FIG. 5 is a cross-sectional view C-C shown in FIG. 1;

FIG. 6 is an enlarged view taken at I of FIG. 5;

FIG. 7 is a cross-sectional view taken along line D-D of FIG. 2;

10-a box cover; 11-a frame assembly; 12-a protective base plate; 13-a through hole; 14-a concave groove; 15-convexity; 16-an adhesive layer; 17-liquid cooling plate; 18-edge beam; 19-flow drill screws; 20-a scaffold; 21-a screw; 22-rivet nuts; 23-a cross beam; 231-a first plate; 232-a second plate; 24-a sealant layer; 25-a recess; 26-sealing member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the utility model have been omitted.

According to a specific embodiment of the present invention, in a first aspect, the present invention provides a battery pack case, as shown in fig. 1 to 7, including: a frame assembly 11 having a receiving cavity for receiving a battery cell; a protective bottom plate 12 arranged on the side away from the bottom of the accommodating cavity; and the fixing structure comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with the frame assembly 11, and the second connecting piece is matched with the first connecting piece so as to detachably connect the protective bottom plate 12 with the frame assembly 11. The fixed knot constructs can be established to the fastener and connects or the joint structure, first connecting piece can be fixed in the bottom that holds the chamber of frame assembly 11, be fixed in frame assembly 11 with protection bottom plate 12 through the cooperation of second connecting piece and first connecting piece on, and realize being connected with dismantling of protection bottom plate 12 and frame assembly 11, through the protection of protection bottom plate 12 to frame assembly 11, even the vehicle is because of slightly dragging the end accident, can directly change protection bottom plate 12, and need not to change whole box, thereby reduce the cost of maintenance because of this type of accident.

The battery pack box provided by the embodiment of the utility model further comprises a box cover 10, and the box cover 10 is covered on the frame assembly 11 so as to close the accommodating cavity.

In some embodiments, a plurality of through holes 13 are disposed at intervals in the protection bottom plate 12, the through holes 13 are disposed parallel to the plate surface of the protection bottom plate 12, and a portion between two adjacent through holes 13 forms a support for supporting the two plate surfaces of the protection bottom plate 12 that are disposed opposite to each other. Set up a plurality of through-holes 13 through the interval, protection bottom plate 12 sets up to hollow structure, can make protection bottom plate 12 lightweight design, and protection bottom plate 12's material can be established to fine or carbon fibre, the weight of reducible battery package box to realize subtracting heavy and promote specific energy, increase the continuation of driving mileage of whole car.

In some embodiments, the number of the protection base plates 12 is multiple, two opposite ends of each protection base plate 12 are respectively provided with a concave groove 14 and a convex body 15 matched with the concave groove 14, and adjacent protection base plates 12 are connected with the convex body 15 through the concave grooves 14. The protective bottom plate 12 can be designed as a whole, but for easy pultrusion, the protective bottom plate 12 can be provided in a plurality of numbers, and the plurality of protective bottom plates 12 can be connected into a whole by the matching connection of the concave grooves 14 and the convex bodies 15; when the local deformation occurs and needs to be replaced, only one of the protection bottom plates can be replaced without replacing the whole protection bottom plate 12, and the waste of materials is avoided.

In some embodiments, an adhesive layer 16 is disposed between the concave groove 14 and the convex body 15, and the adhesive layer 16 is used for connecting and fixing the concave groove 14 and the convex body 15. The adhesive layer 16 is formed by coating structural adhesive on the outer surface of the convex body 15 or the concave groove 14, and the connection between the adjacent protective bottom plates 12 can be more stable and reliable through the adhesive layer 16.

In an exemplary embodiment, the cross section of the convex body 15 is trapezoidal, the longitudinal section of the convex body 15 is rectangular, the lower bottom of the trapezoid is connected with the protection bottom plate 12, and the longitudinal section area of the convex body 15 gradually decreases along the direction from the lower bottom of the trapezoid to the upper bottom of the trapezoid. The protective bottom plate can be connected into a whole by a plurality of protective bottom plates 12 in the width direction, the cross section of the convex body 15 is arranged along the width direction of the protective bottom plate 12, as shown in fig. 5, the left and right direction of the figure is the width direction of the protective bottom plate 12, and the cross section of the convex body 15 is the section plane of the protective bottom plate 12 along the width direction of the protective bottom plate 12; as shown in fig. 6, the cross section of the convex body 15 can be trapezoidal, two equal waists of the trapezoid are inclined planes, the bottom of the trapezoid is a long side, the top of the trapezoid is a short side, the convex body 15 can be easily inserted into the concave groove 14 and can be positioned by the guidance of the two inclined planes, so that the connection between the two adjacent protective bottom plates 12 is flat and more attractive; the longitudinal section of the protrusion 15 is arranged along the longitudinal direction of the protection base plate 12, the long side of the protection base plate 12 shown in fig. 1 is the longitudinal direction of the protection base plate 12, the longitudinal section of the protrusion 15 is the cross section of the protection base plate 12 along the longitudinal direction of the protection base plate 12, and the protrusion 15 is inserted into the concave groove 14, so that the protrusion 15 becomes a support body, and the risk of breaking or deforming due to the connection part becoming a weak part is avoided.

In another embodiment, the convex body 15 can be a rectangular parallelepiped, and the concave groove 14 matches with the convex body 15. The other end of the convex body 15 far from the protection bottom plate 12 can be provided with a chamfer so that the convex body 15 can be easily inserted into the concave groove 14, and of course, the shape of the convex body 15 can be in other forms according to actual needs as long as the embedded connection between the convex body 15 and the concave groove 14 can be realized, which is not described herein again. In some embodiments, the frame assembly 11 includes a liquid-cooled plate 17 and an edge beam 18 disposed around the liquid-cooled plate 17, and the liquid-cooled plate 17 and the edge beam 18 enclose the accommodating cavity; the first connecting piece is fixedly connected with the liquid cooling plate 17. The boundary beams 18 are connected through friction stir welding to form a rectangular structure, and the boundary beams 18 are aluminum alloy extruded sections; as shown in fig. 4, the edge beam 18 is fixedly connected with the liquid cooling plate 17 through a flow drill screw 19. Because the connection process of the flow drilling screw 19 has sealing performance, but in order to ensure reliable sealing, sealant can be pre-coated between the edge beam 18 and the liquid cooling plate 17 to form a sealing adhesive layer 24, so that the connection of the flow drilling screw 19 is more reliable and durable.

In order to ensure reliable sealing, as shown in fig. 7, the frame assembly 11 further includes a sealing member 26, specifically, the sealing member may be a sealant layer, or may be a sealing gasket, and the sealing member 26 is disposed between the edge beam 18 and the liquid cooling plate 17, so that the edge beam 18 and the liquid cooling plate 17 are connected in a sealing manner. The boundary beam 18 in the left and right direction of the vehicle is provided with a supporting block extending towards the containing cavity, the supporting block is used for installing a battery module, a rivet nut 22 can be riveted on the supporting block at a position close to the boundary beam 18, an avoiding hole is formed in the liquid cooling plate 17, a concave part 25 can be arranged at the bottom end of the supporting block, a sealing element 26 is arranged in the concave part 25, the height of the sealing element 26 can protrude out of the concave part 25, the liquid cooling plate 17 is fixedly connected with the supporting block through a flow drilling screw 19, so that the liquid cooling plate 17 compresses the sealing element 26, the reliable sealing performance is realized, and the situation that the fluid in the liquid cooling plate 17 permeates into the containing cavity to influence the performance of a battery core in the containing cavity is prevented; therefore, no sealing measure is required between the protection floor 12 and the frame assembly 11, so that the detachability of the protection floor is easily achieved.

In some embodiments, the box further comprises a bracket 20, wherein the bracket 20 is arranged between the protective bottom plate 12 and the liquid cooling plate 17, so that a gap is formed between the protective bottom plate 12 and the liquid cooling plate 17; the position of the bracket 20 corresponds to that of the first connecting piece, and the second connecting piece penetrates through the bracket 20 to be connected with the first connecting piece. The bracket 20 is disposed between the protection base plate 12 and the frame assembly 11, so that a gap is formed between the protection base plate 12 and the frame assembly 11; when the protection bottom plate 12 is stressed, the buffer can be formed, the impact on the liquid cooling plate 17 is reduced, and the damage to the frame assembly 11 is reduced. The box body is maintained by replacing the protective bottom plate 12 without replacing the frame assembly 11, so that the maintenance cost of the box body is reduced. The support 20 can be an integral body, or the support 20 can be a plurality of mutually independent shaft sleeves, one shaft sleeve is arranged at each first connecting piece, and the second connecting piece penetrates through the shaft sleeves to be matched with the first connecting pieces so as to fix the protection bottom plate 12 on the frame assembly 11; the support 20 elevates the protective base plate 12 and the frame assembly 11 to a height that can be extended to different heights to leave sufficient safety space for the liquid cooled plate 17.

In the exemplary embodiment, the first connector is a blind rivet nut 22 and the second connector is a screw 21; the rivet nut 22 is riveted on the liquid cooling plate 17, the rivet nut 22 is connected with the liquid cooling plate 17 in a sealing mode, two ends of the support 20 respectively abut against the rivet nut 22 and the protective bottom plate 12, the screw 21 sinks into the through hole 13, the screw 21 sequentially penetrates out of the protective bottom plate 12 and the support 20, and the screw 21 is connected with the rivet nut 22 so that the frame assembly 11 is fixed relative to the protective bottom plate 12. The liquid cooling plate 17 is provided with a first layer plate and a second layer plate, wherein concave flow channels can be arranged on the first layer plate and the second layer plate so as to form a sealed flow channel between the first layer plate and the second layer plate for fluid circulation, a battery core is placed on the first layer plate, the pull rivet nut 22 can be riveted on the first layer plate, the second layer plate is positioned below the first layer plate and is close to the protective bottom plate 12, and a larger hole can be formed in the second layer plate for the convenience of riveting so as to enable the pull rivet nut 22 to sink into the hole; a hole can be reserved on the first laminate, the periphery of the reserved hole and the first laminate can be pre-coated with sealant, and after the rivet nut 22 is riveted and formed, the sealant can be extruded to fill the gap to form a sealing glue layer 24, so that the riveting joint of the rivet nut 22 and the liquid cooling plate 17 is effectively and reliably sealed; in addition, sealant can be smeared between the periphery of the larger hole formed on the second laminate and the rivet nut 22 to realize sealing; the rivet nut 22 is riveted on the liquid cooling plate 17, so that a threaded connection point can be provided when the protective base plate 12 is subsequently replaced, the replacement is easy, and the replacement of the protective base plate 12 can be quickly realized.

In some embodiments, the guard base plate 12 has a counterbore therein, and the counterbore communicates with the through hole 13. The screw head of the screw 21 connecting the shield base plate 12 and the frame assembly 11 is located in the through hole 13.

The frame assembly 11 further comprises a plurality of cross beams 23, the plurality of cross beams 23 are arranged in the accommodating cavity, and the plurality of cross beams 23 are arranged at intervals so that the accommodating cavity is divided into a plurality of accommodating spaces; the cross beam 23 comprises a first plate 231 and a second plate 232, the first plate 231 and the second plate 232 are arranged at intervals, reinforcing ribs are arranged between the first plate 231 and the second plate 232, and the rivet nuts 22 are located in the space between the first plate 231 and the second plate 232. The arrangement of the cross beam 23 enables the accommodating cavity to be divided into a plurality of accommodating spaces, so that the battery cores can be placed in the accommodating spaces orderly, two ends of the cross beam 23 can be firmly connected with the edge beam, the whole frame assembly 11 is further strengthened, and the whole frame assembly 11 can be prevented from generating thermal expansion deformation under the influence of heat dissipation of the battery cores; in addition, sealant can be coated at the joints of the first plate 231 and the second plate 232 and the liquid cooling plate 17 respectively, and the blind rivet nut 22 is positioned in the space between the first plate 231 and the second plate 232, so that the sealed joints of the blind rivet nut 22 are completely isolated from the battery core, and the possibility of fluid leakage to the battery core is avoided.

According to a second aspect of the present invention, there is provided a battery pack, including the battery pack case, the battery pack case having a receiving cavity; and a battery cell disposed in the accommodating chamber.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof, may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A battery pack case, comprising:

a frame assembly (11) having a receiving cavity that can receive a battery cell;

a protective bottom plate (12) arranged on one side away from the bottom of the accommodating cavity;

the fixing structure comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with the frame assembly (11), and the second connecting piece is matched with the first connecting piece so as to detachably connect the protective bottom plate (12) with the frame assembly (11).

2. The battery pack box body according to claim 1, wherein a plurality of through holes (13) are arranged in the protective bottom plate (12) at intervals, the through holes (13) are arranged in parallel with the plate surface of the protective bottom plate (12), and a part between two adjacent through holes (13) forms a support body for supporting the two plate surfaces of the protective bottom plate (12) which are arranged oppositely; and/or the presence of a gas in the gas,

the protection bottom plate (12) are a plurality of, every the relative both ends of protection bottom plate (12) set up respectively into concave groove (14) and with concave groove (14) assorted convex body (15), adjacent between protection bottom plate (12) through concave groove (14) with convex body (15) are connected.

3. The battery case body according to claim 2, wherein an adhesive layer (16) is arranged between the concave groove (14) and the convex body (15), and the adhesive layer (16) is used for connecting and fixing the concave groove (14) and the convex body (15).

4. The battery pack case according to claim 2 or 3, wherein the cross section of the convex body (15) is trapezoidal, the longitudinal section of the convex body (15) is rectangular, the lower bottom of the trapezoid is connected with the protection bottom plate (12), and the longitudinal section area of the convex body (15) is gradually reduced along the direction from the lower bottom of the trapezoid to the upper bottom of the trapezoid.

5. The battery pack case according to claim 2 or 3, wherein the frame assembly (11) comprises a liquid-cooled plate (17) and edge beams (18) arranged on the peripheral edges of the liquid-cooled plate (17), the liquid-cooled plate (17) and the edge beams (18) enclose to form the accommodating cavity;

the first connecting piece is fixedly connected with the liquid cooling plate (17).

6. The battery pack case according to claim 5, further comprising a bracket (20), wherein the bracket (20) is disposed between the protection bottom plate (12) and the liquid cooling plate (17) to form a gap between the protection bottom plate (12) and the liquid cooling plate (17);

the support (20) corresponds to the first connecting piece in position, and the second connecting piece penetrates through the support (20) and is fixedly connected with the first connecting piece.

7. The battery pack case according to claim 6, wherein the first connector is a rivet nut (22) and the second connector is a screw (21); rivet nut (22) rivet in on liquid cooling board (17), just rivet nut (22) with liquid cooling board (17) sealing connection, the both ends of support (20) are supported tightly respectively rivet nut (22) with protection bottom plate (12), screw (21) sink in through-hole (13), screw (21) pass in proper order protection bottom plate (12) and support (20), screw (21) with rivet nut (22) are connected so that frame assembly (11) with protection bottom plate (12) relatively fixed.

8. The battery pack case according to any one of claims 1 to 3, wherein the frame assembly (11) further comprises a cross member (23), the cross member (23) is provided in the accommodation chamber, and the cross member (23) divides the accommodation chamber into a plurality of accommodation spaces;

the beam (23) comprises a first plate (231) and a second plate (232), the first plate (231) and the second plate (232) are arranged at intervals, reinforcing ribs are arranged between the first plate (231) and the second plate (232), and the first connecting piece is located in a space between the first plate (231) and the second plate (232).

9. A battery pack comprising a battery pack case according to any one of claims 1 to 8, the battery pack case having a housing cavity, and,

and the battery core is arranged in the accommodating cavity.

10. A vehicle characterized by comprising the battery pack according to claim 9.