CN219917435U - Novel battery pack and electric vehicle - Google Patents

Abstract

The utility model discloses a novel battery pack and an electric vehicle, wherein the novel battery pack comprises a hollow battery box body; the bottom of the battery box body is sealed and the top of the battery box body is opened; the top of the battery box body is provided with a battery box cover in a sealing way; a battery module is arranged in the battery box body; the left side and the right side of the battery module are respectively provided with a module side plate; a plurality of single battery cores are arranged between the two module side plates; the inner side wall of the battery box body is provided with a plurality of convex ribs at positions corresponding to the side plates of each module respectively; the side surface of the side plate of the module is contacted with the adjacent convex ribs; the top of the module side plate is fixedly connected with the top of the convex rib through a screw. The utility model has scientific structural design, can reliably fixedly connect the battery modules, and effectively avoids collision between the battery modules and the battery box body, thereby prolonging the service lives of the battery pack, the battery modules therein and the battery cells. The utility model avoids the traditional glue sealing and enhances the maintainability of the battery.

Description

Novel battery pack and electric vehicle

Technical Field

The utility model relates to the technical field of batteries, in particular to a novel battery pack and an electric vehicle.

Background

In the existing two-wheeled electric vehicle, a battery pack is usually located in a battery compartment below a seat or a foot pad of the vehicle, and the battery pack comprises a battery box body and a battery module located in the battery box body. Because the battery pack is not normally hard-connected and fixed in the battery compartment, the battery box body is often bumpy in the running process of the electric vehicle, and because the battery module is normally fixed in the battery box body only by virtue of limiting compaction of the box cover, a gap is often reserved between the battery module and the inner wall of the battery box body, and complete fixation of the battery module cannot be formed, so that the battery module and the battery box body collide in the running process of the electric vehicle, and the service lives of the battery pack, the battery module in the battery pack and the battery cell are influenced.

In addition, for the battery module in the battery box, the battery cell is usually fixed through the plastic shell or the fiber adhesive tape, and the expansion force of the battery cell in the use process is not considered, and the battery cell can be expanded and deformed after a period of use, so that the service life of the battery pack is reduced.

In addition, the conventional two-wheeled vehicle battery pack is sealed by largely applying glue (namely, smearing sealant) on the edge of the case cover, and the sealing mode is not reliable and affects the later maintenance operation.

Disclosure of Invention

The utility model aims at solving the technical defects existing in the prior art and provides a novel battery pack and an electric vehicle.

Therefore, the utility model provides a novel battery pack, which comprises a hollow battery box body;

the bottom of the battery box body is sealed and the top of the battery box body is opened;

the top of the battery box body is provided with a battery box cover in a sealing way;

a battery module is arranged in the battery box body;

the left side and the right side of the battery module are respectively provided with a module side plate;

a plurality of single battery cores are arranged between the two module side plates;

the inner side wall of the battery box body is provided with a plurality of convex ribs at positions corresponding to the side plates of each module respectively;

the side surface of the side plate of the module is contacted with the adjacent convex ribs;

the top of the module side plate is fixedly connected with the top of the convex rib through a screw.

In addition, the utility model also provides an electric vehicle, which comprises the novel battery pack.

Compared with the prior art, the novel battery pack and the electric vehicle provided by the utility model have the advantages that the structural design is scientific, the battery modules can be reliably and fixedly connected, the collision between the battery modules and the battery box body is effectively avoided, and therefore, the service lives of the battery pack and the battery modules and the battery cores in the battery pack are prolonged, and the novel battery pack and the electric vehicle have great practical significance.

In addition, the module structure designed by the utility model can effectively resist the expansion deformation of the battery core, and simultaneously can realize the effective sealing connection between the battery box cover and the battery box body, thereby avoiding the traditional glue sealing and enhancing the maintainability of the battery.

Drawings

Fig. 1 is a schematic view of the overall appearance of a novel battery pack according to the present utility model;

FIG. 2 is a perspective exploded view of a new battery pack according to the present utility model;

FIG. 3 is a schematic structural view of a lid assembly in a novel battery pack according to the present utility model;

fig. 4 is a schematic structural view of a battery module in the novel battery pack according to the present utility model;

fig. 5 is a schematic structural diagram of a battery case in the novel battery pack according to the present utility model.

Detailed Description

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1 to 5, the utility model provides a novel battery pack and an electric vehicle, which comprises a hollow battery box body 1;

the bottom of the battery box body 1 is sealed and the top is opened;

the top of the battery box body 1 is provided with a battery box cover 4 in a sealing way;

a battery module 2 is arranged in the battery box body 1;

the left and right sides of the battery module 2 are respectively provided with a module side plate 202;

a plurality of single battery cells 201 are arranged between the two module side plates 202;

the inner side wall of the battery box 1 is provided with a plurality of (not limited to two) convex ribs 102 at positions corresponding to each module side plate 202;

the side surface of the module side plate 202 is tightly propped against the adjacent convex ribs 102;

the top of the module side plate 202 is fixedly connected with the top of the rib 102 by a screw.

In the present utility model, in a specific implementation, the plurality of single cells 201 specifically includes two columns of single cells that are vertically distributed;

the single battery cells in each row of single battery cells are sequentially stacked from top to bottom;

each single cell is horizontally arranged, and the large surfaces of the single cells are positioned on the upper side and the lower side of the single cell.

The large surface of the single cell is the side with the largest surface area in the single cell, such as the upper side and the lower side of the single cell 201 shown in fig. 2.

In the utility model, in particular implementation, the top of each convex rib 102 is respectively provided with a convex rib internal thread hole 105;

a side plate bending portion 2021 protruding horizontally outward is provided on the top of each module side plate 202;

the side plate bending portions 2021 are provided with first side plate screw holes, respectively, at positions corresponding to the respective bead internal screw holes 105;

the side plate bending portion 2021 of the module side plate 202 is fixed on the rib 102 by a plurality of first screws.

Each first screw is fixedly connected with the corresponding convex rib internal thread hole 105 through threads after penetrating through one first side plate thread hole.

In particular, the top of the two module side plates 202 is fixedly provided with a module end plate 203;

the module end plate 203 is provided with first end plate screw holes 2031 at positions corresponding to each of the side plate screw holes on the side plate bent portion 2021, respectively;

each first screw sequentially passes through the corresponding first end plate threaded hole 2031 and the corresponding first side plate threaded hole and is fixedly connected with the corresponding rib internal threaded hole 105 through threads.

It should be noted that, for the present utility model, the side plate bending portion 2021 of the module side plate 202 and the module end plate 203 can be firmly and fixedly connected to the protruding rib 102 on the inner side wall of the battery box 1 through a plurality of first screws, so as to ensure that the battery module 2 cannot shake and collide in the inner cavity of the battery box 1 due to external jolt, and further improve the service life of the battery module 2 and the whole battery pack.

Further, on each side plate bending portion 2021, a plurality of second side plate screw holes (not limited to three) are provided at intervals;

the left and right ends of the module end plate 203 are respectively provided with one second end plate screw hole 2032 (not limited to three) at positions corresponding to each second side plate screw hole;

the module end plate 203 is fixedly connected with the side plate bending part 2021 of the module side plate 202 through a plurality of first bolts;

each first bolt passes through the second end plate threaded hole 2032 and is fixedly connected with the corresponding second side plate threaded hole in a threaded manner.

Therefore, based on the above structural design, the module end plate 203 and the module side plate 202 can be fixedly connected to form a stable battery module frame.

In the present utility model, the bottoms of the two module side plates 202 are fixedly connected by a plurality of side plate reinforcing ribs 2022 which are distributed at intervals;

a plurality of side plate reinforcing ribs 2022 which are uniformly distributed at the bottom of the battery module 2;

the side plate reinforcing ribs 2022 are in contact with the large surface of the bottom of the single cell 201.

The side plate reinforcing ribs 2022 are closely attached to the large surface of the single cell 201, and according to the present utility model, the side plate reinforcing ribs 2022 can effectively resist expansion deformation of the cell in the large surface direction.

In particular, a plurality of end plate reinforcing ribs 2033 are arranged at the top of the module end plate 203 and distributed transversely;

the end plate reinforcing ribs 2033 are uniformly distributed on the top of the module end plate 203;

the bottom of the module end plate 203 is in contact with the large face of the top of the individual cells 201.

Therefore, the end plate reinforcing ribs 2033 on the module end plate 203 can effectively resist the expansion deformation of the battery cell in the large-surface direction, so as to avoid safety accidents caused by the extrusion of the battery box body and other components due to the deformation of the battery cell.

In particular, the side plate reinforcing ribs 2022 and the end plate reinforcing ribs 2033 are both reinforcing ribs with a shape of a "several" on the side, and have the same shape and size.

It should be noted that, the battery module 2 is an assembly, the plurality of single cells 201 are clamped and fixed by two module side plates 202 made of C-shaped sheet metal with the thickness of 1mm, the module side plates 203 are locked together with the module side plates 202 through a plurality of bolts, so as to form a compressing limit for the single cells 201, and a plurality of transverse end plate reinforcing ribs 2033 shaped like a Chinese character 'ji' are welded on the module side plates 203. Because the battery end plate and the battery side plate have enough strength, the expansion force of the battery core can be effectively resisted, and the cycle life of the battery core and the battery module is prolonged.

In the utility model, a circle of box cover flanging 404 is circumferentially arranged on the peripheral edge of the bottom of the battery box cover 4;

a circle of inner ring convex ribs 403 are circumferentially arranged at the bottom of the battery case cover 4;

the inner ring convex rib 403 is positioned at the inner side of the box cover flanging 404;

a sealing groove 401 which is distributed in a surrounding way is arranged between the box cover flange 404 and the inner ring convex rib 403;

seal groove 401 is provided with seal ring 3.

In particular, the vertical height of the inner ring ribs 403 is greater than the vertical height of the cover flange 404.

In particular, the inner ring ribs 403 are fixedly connected with the upper end of the battery box 1 through a plurality of second screws.

Further, a plurality of blind hole studs 402 are arranged on the inner side of the inner ring convex rib 403;

the side walls of the periphery of the inner ring convex ribs 403 are provided with convex rib through holes at positions corresponding to the blind holes on each blind hole stud 402;

the upper end side wall of the battery box 1 is provided with a box through hole 101 at a position corresponding to each convex rib through hole;

the second screw passes through the box through hole 101 and the convex rib through hole corresponding to the positions in sequence and is fixedly connected with the blind hole stud 402 through threads.

In particular, the width of the sealing groove 401 is about 3mm, the depth is about 3mm, the sealing groove is used for installing the sealing ring 3, the inner side of the inner ring convex rib 403 is provided with a plurality of blind hole studs 402 which are in one-to-one correspondence with the box body through holes 101 on the side surface of the top of the box body 1, and after the sealing groove is fastened by screws, the mechanical strength and the air tightness of the screw holes can be ensured;

in particular, the sealing ring 3 is in interference fit with the sealing groove 401.

In particular, the battery case cover 4 is provided with a charging socket 5, a discharging socket 6, and an antenna case 7.

Wherein the charging socket 5 and the discharging socket 6 are conventional components on the existing battery pack;

the charging socket 5 is used for charging the battery, two through holes on the charging socket are matched with the internal threaded studs on the battery case cover 4, and the charging socket can be locked on the battery case cover 4 through two screws;

the discharging interface 6 is connected with an insert on the two-wheeled electric vehicle and can discharge to provide a power source for the vehicle, the battery is discharged through the socket to drive the electric vehicle to run, two through holes on the discharging interface are matched with the internal threaded studs on the battery box cover 4, and the discharging interface can be locked on the battery box cover 4 through two screws.

The antenna box 7 is stuck with GPS on the inner side and can be used for positioning the position of the battery box body. The antenna box 7 is screwed from the inner side of the battery box cover 4 to be fixed on the battery box cover 4, the antenna cover is made of plastic with the material of 1mm, the GPS patch is attached to the inner side of the antenna cover 7, and signals can be well transmitted to the outside through the plastic material.

In the present utility model, a handle 9 (U-shaped handle) is hinged to the battery case cover 4 to facilitate the user's lifting of the battery pack.

It should be noted that, the handle 9 is hinged to the battery case cover 4, and can be freely moved by 90 degrees, so that the battery case can be easily lifted, and meanwhile, the charging socket 5 and the discharging socket 6 are also positioned at the top of the battery case, so that the battery case is convenient for a user to use and charge. The handle 9 comprises fixing base and lifting ring, and the lifting ring can 90 degrees free movements for carry the battery case, and the fixing base is gone up the limit and is had two through-holes respectively, matches with the double-screw bolt on the battery case lid 4, can lock it on the battery case lid 4 through four M4 screws.

In the utility model, in particular, an explosion-proof ventilation valve 8 is arranged on the battery box cover 4 and is used for pressure relief and gas tightness detection of products by inflation before delivery.

The explosion-proof vent valve 8 is provided with a screw thread, and can be screwed on a nut reserved at the inner side of the battery case cover 4, when thermal runaway occurs in the battery, the explosion-proof valve (namely the explosion-proof vent valve 8) is opened to release pressure, and accidents such as explosion are avoided.

In the present utility model, a Battery Management System (BMS) 10 is provided at the bottom of the battery case cover 4 to monitor the state of the battery and control the use of the battery. Since the Battery Management System (BMS) 10 is a well-known battery management module in the prior art, it is an existing product and will not be described herein.

It should be noted that, the sealing ring 3 is made of silica gel, has a certain elasticity, the shape is the same as the sealing groove 401, and the size is 0.5mm larger than the sealing groove 301, so that the sealing groove 401 can be fully filled after the sealing ring is installed, thereby ensuring the air tightness of the battery box, and meanwhile, the battery box cover 4 is provided with a plurality of holes and a plurality of studs in the inner side direction of the inner ring convex rib 403, and can be used for installing a plurality of parts such as the charging socket 5, the discharging socket 6, the antenna box 7, the explosion-proof ventilation valve 8, the lifting handle 9, the Battery Management System (BMS) 10 and the like, and the parts are tightly locked on the battery box cover 4.

It should be noted that, the sealing ring 3 is installed in the sealing groove 401 of the battery case cover 4, after the battery case body and the battery case cover are locked by the bolts, the sealing ring 3 is pressed tightly, so that the sealing ring is filled in the sealing groove 401 of the case cover, thereby forming a sealing layer, isolating the space inside and outside the case body, and making impurities, water vapor and the like unable to enter the battery case from the outside.

The battery case cover 4 is used for covering the top opening of the battery case 1, and is matched with the battery case 1 and the sealing ring 3 to prevent sundries, water and the like from entering the inside of the battery case.

In particular, the battery case cover 4 is an integrally formed mold piece of cast aluminum, a circle of inner ring ribs 403 in a shape of a Chinese character 'hui' is arranged on the inner side of the mold piece, the thickness of the inner ring ribs 403 is 2.5mm, a plurality of blind hole threaded holes (in particular, threaded holes on the blind hole studs 402) are uniformly distributed on the inner ring ribs 403, and the blind hole threaded holes are correspondingly arranged with the case through holes 101 on the battery case 2;

a circle of empty groove (namely a sealing groove 401) is formed between the outer ring of the inner ring convex rib 403 and the flange 404 of the box cover and is used for placing a silica gel sealing ring, and the sealing ring can be tightly pressed by the locking force of the box body and the box cover, so that the sealing ring is completely filled in the empty groove, and the tightness in the box is ensured.

In the utility model, the battery box 1 comprises a lower box barrel 103 and a bottom plate 104;

the peripheral edge of the bottom of the lower tank 103 of the box body is connected with the peripheral edge of the top of the bottom plate 104 in a sealing way (for example, by welding, the sealing connection is realized);

two convex ribs 102 are respectively arranged on the inner walls of the left side and the right side of the lower tank 103;

a plurality of box through holes 101 are uniformly formed on the peripheral side walls of the upper end of the box lower barrel 103;

it should be noted that, the inner walls of the left and right sides of the lower barrel 103 are respectively provided with two ribs 102, which can strengthen the strength of the battery box and prevent the deformation of the box.

The protruding muscle 102 is used for spacing to battery module 2, has a protruding muscle internal thread hole 105 on every protruding muscle 102, and protruding muscle internal thread hole 105 corresponds with the first side board screw hole one-to-one on the module curb plate 202 of battery module 2, through behind bolt and the module curb plate looks threaded connection, can fix battery module 2 in battery box 1.

It should be noted that, a plurality of box through holes 101 are uniformly distributed around the upper layer of the lower barrel 103, and correspond to a plurality of blind hole studs 402 on the box cover 4 one by one, and the battery box cover 4 and the battery box can be locked and fixed through the bolts to form a whole.

In particular, the bottom plate 104 is an aluminum alloy plate, for example, an aluminum plate with a thickness of 3mm, and is welded with the lower tank 103 of the battery box body by friction stir welding, so as to accommodate the battery module and ensure the air tightness of the inner cavity of the battery box body 1.

In particular implementation, the battery box body 1 is a cuboid cavity with an opening at the top, and the main cavity is a 3mm thick aluminum die piece integrally formed by profiles.

Based on the novel battery pack provided by the utility model, the utility model also provides an electric vehicle, preferably a two-wheel electric vehicle, wherein the novel battery pack shown in fig. 1 to 5 is arranged on the electric vehicle, and the novel battery pack is used as a power source of the electric vehicle to drive the electric vehicle to run.

In summary, compared with the prior art, the novel battery pack and the electric vehicle provided by the utility model have the advantages that the structural design is scientific, the battery modules can be reliably and fixedly connected, the collision between the battery modules and the battery box body is effectively avoided, and therefore, the service lives of the battery pack, the battery modules in the battery pack and the battery cells in the battery pack are prolonged, and the novel battery pack and the electric vehicle have great practical significance.

In addition, the module structure designed by the utility model can effectively resist the expansion deformation of the battery core, and simultaneously can realize the effective sealing connection between the battery box cover and the battery box body, thereby avoiding the traditional glue sealing and enhancing the maintainability of the battery.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. A novel battery pack is characterized by comprising a hollow battery box body (1);

the bottom of the battery box body (1) is sealed and the top of the battery box body is open;

the top of the battery box body (1) is provided with a battery box cover (4) in a sealing way;

a battery module (2) is arranged in the battery box body (1);

the left side and the right side of the battery module (2) are respectively provided with a module side plate (202);

a plurality of single battery cores (201) are arranged between the two module side plates (202);

the inner side wall of the battery box body (1) is provided with a plurality of convex ribs (102) at positions corresponding to the side plates (202) of each module respectively;

the side surface of the module side plate (202) is contacted with the adjacent convex rib (102);

the top of the module side plate (202) is fixedly connected with the top of the convex rib (102) through a screw.

2. The novel battery pack according to claim 1, wherein the top of each rib (102) is provided with a rib internal thread hole (105);

a side plate bending part (2021) protruding horizontally outwards is arranged at the top of each module side plate (202);

the side plate bending parts (2021) are respectively provided with first side plate threaded holes at positions corresponding to the inner threaded holes (105) of each convex rib;

the side plate bending part (2021) of the module side plate (202) is fixed on the convex rib (102) through a plurality of first screws;

each first screw is fixedly connected with the corresponding convex rib internal thread hole (105) through threads after penetrating through one first side plate thread hole respectively.

3. The novel battery pack according to claim 2, wherein the top of the two module side plates (202) is fixedly provided with a module end plate (203);

the module end plate (203) is provided with a first end plate threaded hole (2031) at a position corresponding to each side plate threaded hole on the side plate bending part (2021);

each first screw sequentially passes through the corresponding first end plate threaded hole (2031) and the corresponding first side plate threaded hole and is fixedly connected with the corresponding convex rib internal threaded hole (105) in a threaded manner.

4. A new battery pack as claimed in claim 3, wherein a plurality of second side plate threaded holes are provided in each side plate bending portion (2021) at intervals;

the left end and the right end of the module end plate (203) are respectively provided with a second end plate threaded hole (2032) at positions corresponding to the threaded holes of each second side plate;

the module end plate (203) is fixedly connected with the side plate bending part (2021) of the module side plate (202) through a plurality of first bolts;

each first bolt passes through a second end plate threaded hole (2032) and is fixedly connected with a corresponding second side plate threaded hole in a threaded manner.

5. The novel battery pack as claimed in claim 3, wherein each single cell is horizontally placed, and large faces of the single cells are located at upper and lower sides thereof;

the bottoms of the two module side plates (202) are fixedly connected through a plurality of side plate reinforcing ribs (2022) which are distributed at intervals;

a plurality of side plate reinforcing ribs (2022) which are uniformly distributed at the bottom of the battery module (2);

the side plate reinforcing ribs (2022) are contacted with a large surface at the bottom of the single battery cell (201);

a plurality of end plate reinforcing ribs (2033) which are transversely distributed are arranged at the top of the module end plate (203);

end plate reinforcing ribs (2033) are uniformly distributed on the top of the module end plate (203);

the bottom of the module end plate (203) is contacted with the large surface of the top of the single battery cell (201).

6. The novel battery pack according to claim 1, wherein a ring of case cover flanges (404) are circumferentially provided at the bottom peripheral edge of the battery case cover (4);

the bottom of the battery box cover (4) is provided with a circle of inner ring convex ribs (403) in a surrounding manner;

the inner ring convex rib (403) is positioned at the inner side of the box cover flanging (404);

a sealing groove (401) which is distributed in a surrounding way is arranged between the box cover flanging (404) and the inner ring convex rib (403);

a seal ring (3) is provided in the seal groove (401).

7. The novel battery pack according to claim 6, wherein the inner ring ribs (403) are fixedly connected with the upper end of the battery box body (1) through a plurality of second screws;

a plurality of blind hole studs (402) are arranged on the inner side of the inner ring convex rib (403);

the side walls of the periphery of the inner ring convex ribs (403) are provided with convex rib through holes at positions corresponding to the blind holes on each blind hole stud (402);

the upper end side wall of the battery box body (1) is provided with a box body through hole (101) at a position corresponding to each convex rib through hole;

the second screw sequentially passes through the box body through hole (101) and the convex rib through hole corresponding to the positions and is fixedly connected with the blind hole stud (402) through threads.

8. The novel battery pack as claimed in claim 6, wherein the vertical height of the inner ring bead (403) is greater than the vertical height of the case lid flange (404);

and/or the sealing ring (3) is in interference fit with the sealing groove (401).

9. The novel battery pack according to claim 1, wherein the battery case (1) comprises a case lower tub (103) and a bottom plate (104);

the peripheral edge of the bottom of the lower tank (103) of the box body is connected with the peripheral edge of the top of the bottom plate (104) in a sealing way;

two convex ribs (102) are respectively arranged on the inner walls of the left side and the right side of the lower barrel (103) of the box body;

a plurality of box through holes (101) are uniformly formed on the peripheral side wall of the upper end of the box lower barrel (103);

the battery box cover (4) is provided with a charging socket (5), a discharging socket (6), an antenna box (7), an explosion-proof ventilation valve (8), a handle (9) and a battery management system (10).

10. An electric vehicle comprising a novel battery pack according to any one of claims 1 to 9.