CN219979689U - Metal casing lithium iron phosphate battery pack for single car - Google Patents

Abstract

The utility model discloses a metal shell lithium iron phosphate battery pack for a single vehicle, which comprises a lower shell, a lithium iron phosphate battery core, a connecting sheet, an insulating plate, an insulating film, a sampling wire harness, a plastic steel belt, an upper cover, a handle, an electric quantity display unit, a power discharge station, a protective plate, an upper side plate, an end plate, a lower side plate and buffer foam. Compared with the prior art, the utility model has the advantages that: according to the battery pack, an insulating pad is designed between battery cores to reserve expansion gaps, insulating plates are adhered to the periphery and the bottom of a module, end plates and side plates are used for locking and attaching, and plastic steel belts are added for binding and restraining the expansion of the battery cores; the electric core module is spacing with inferior valve inner wall through end plate and curb plate again, and upper plate and inferior valve fixed block screw fixation simultaneously, and electric core module's is fixed firm reliable.

Description

Metal casing lithium iron phosphate battery pack for single car

Technical Field

The utility model relates to the technical field of battery packs, in particular to a metal-shell lithium iron phosphate battery pack for a single car.

Background

The battery pack of the electric bicycle and the electric motorcycle has the advantages that most of battery packs of the electric bicycle and the electric motorcycle are not provided with heat dissipation devices, the temperature is too high during high-rate discharge and quick charge, the attenuation is more than 30% after the battery packs are used for 2 years to 3 years, the endurance mileage is greatly reduced, the use safety risk is high in cases of too high temperature and explosion, in addition, most of battery packs of the electric motorcycle and the electric bicycle on the market are directly placed in the battery packs by adopting cell spot welding, no heat conduction and heat dissipation devices are added, the heat dissipation efficiency is very slow, and the battery capacity and the service life attenuation are fast. And the battery pack adopts a battery core spot welding (battery core resistance welding) confluence technology, and after external short circuit occurs, the fusing difficulty of the nickel sheet is high, and the battery core is directly damaged, so that the battery pack breaks down or fires and explodes.

The structure of the existing battery pack is that the corresponding voltage and capacity standards are achieved by different serial connection and parallel connection modes based on single batteries, but the existing battery pack has the advantages of complex structure, more connecting pieces, lower space utilization rate, higher requirement on installation space and poorer safety and reliability,

the existing electric bicycle battery pack has the following defects:

1. the lithium iron phosphate soft-package battery core has insufficient expansion constraint on the battery core, and bulges easily occur in the use process; the cycle life is not enough; the lead-acid battery has insufficient energy density and short electric bicycle endurance mileage;

2. the plastic shell battery pack is easy to scratch in the use process, low in structural strength, high-temperature and high-humidity, and easy to age and crack when exposed to the sun; the die-cast aluminum or aluminum profile shell battery pack is easy to embrittle at the welding position, the screw strength is low, and the screw is easy to fail after the screw is repeatedly disassembled and assembled;

3. the cylindrical battery cell monomer has small energy and can not meet the requirement of people on large energy.

Disclosure of Invention

The utility model aims to overcome the technical defects, and provides the battery pack for the electric bicycle with the charging and discharging same port, the charging quantity display and the stainless steel sheet metal shell, the battery quantity can be known under the condition of not connecting the electric bicycle, the periphery of the battery core is fastened by the end plate and the side plate, the expansion of the battery core is restrained, and the battery module is firmly and reliably connected with the shell through screws.

In order to solve the problems, the technical scheme of the utility model is as follows: the utility model provides a metal casing lithium iron phosphate battery cell package, includes inferior valve, lithium iron phosphate aluminum shell cell, connection piece, insulation board, insulating film, sampling pencil, plastic steel strip, upper cover, handle, electric quantity display element, discharge station, protection shield, top plate, end plate, lower side plate and buffering bubble are cotton, be equipped with a plurality of lithium iron phosphate aluminum shell cells in the inferior valve, be equipped with the insulation board between the lithium iron phosphate aluminum shell cell, the end plate is located lithium iron phosphate aluminum shell cell both ends, and end plate top and bottom are equipped with top plate and bottom plate, end plate, top plate and bottom plate are fixed through the screw, the plastic steel area is located lithium iron phosphate aluminum shell cell a week, connection piece series connection a plurality of lithium iron phosphate aluminum shell cells, the sampling pencil is located lithium iron phosphate aluminum shell cell one side, the lithium iron phosphate aluminum shell cell top is located to the upper cover, handle swing joint and upper cover top, electric quantity display element locates handle one end, and the other end is equipped with and discharges, locate between lithium iron phosphate aluminum shell cell and the upper cover, paste in the cotton bottom plate of buffering bubble.

Further, a plurality of screw through holes are formed in the periphery of the top of the lower shell, fixing blocks are arranged on two sides of the inner portion of the lower shell and close to the opening, the fixing blocks are L-shaped bending plates, and riveting nuts I are arranged at two ends of the fixing blocks.

Further, four sides of the bottom of the upper cover are provided with bending shrinkage openings, the bending shrinkage openings are provided with a plurality of first waterproof nuts, one end of the top of the upper cover is provided with a plurality of second waterproof nuts, one side of each second waterproof nut is provided with a first round hole, and one end of each first round hole is provided with a square hole.

Further, a plurality of avoidance grooves I are formed in one circle of the upper side plate, avoidance grooves II are formed in two right-angle positions at two ends of one side of the upper side plate, wire harness fixing holes are formed in two opposite sides of the avoidance grooves, a plurality of round holes II are formed in two end faces of the upper side plate, and riveting nuts II are arranged in bending of two sides of the upper side plate.

Further, two sides of the end plate are provided with first bending parts, two ends of the end plate are provided with two grooves, and a third round hole is formed between the two grooves.

Further, a plurality of second bending parts are arranged on two sides of the lower side plate, a groove is formed between the second bending parts, the riveting nut III is arranged in the second bending parts, end faces are arranged at two ends of the lower side plate, and an avoidance groove III is formed at two ends of the lower side plate.

Compared with the prior art, the utility model has the advantages that: according to the battery pack, an insulating pad is designed between battery cores to reserve expansion gaps, insulating plates are adhered to the periphery and the bottom of a module, end plates and side plates are used for locking and attaching, and plastic steel belts are added for binding and restraining the expansion of the battery cores; the electric core module is spacing with inferior valve inner wall through end plate and curb plate again, and upper side plate and inferior valve fixed block screw fixation simultaneously, and electric core module's fixed firm reliable, the shell adopts stainless steel panel beating, is difficult for being corroded rust, scratch, and shell structural strength is high, falls, vibrates, the not fragile battery package of extrusion in-process, and upper cover and inferior valve are beaten and are glued sealedly, and waterproof dustproof grade can reach IP67.

Drawings

Fig. 1 is a schematic view of the whole structure of a battery pack for an electric bicycle according to the present utility model.

FIG. 2 is a schematic view of the lower shell construction in detail;

FIG. 3 is a schematic illustration of the end plate construction details;

FIG. 4 is a schematic view of the lower side plate in detail;

FIG. 5 is a schematic view of the upper side plate in detail;

fig. 6 is a schematic view of the construction of the upper cover in detail.

As shown in the figure: 1. a lower case; 101. screw via holes; 102. a fixed block; 103. riveting a first nut; 2. lithium iron phosphate aluminum shell battery core; 3. a connecting sheet; 4. an insulating plate; 5. an insulating film; 6. sampling a wire harness; 7. a plastic steel belt; 8. an upper cover; 801. bending and necking; 802. a waterproof nut I; 803. a waterproof nut II; 804. square holes; 805. a round hole I; 9. a handle; 10. an electric quantity display unit; 11. discharging a power station; 12. a protective plate; 13. an upper side plate; 1301. avoidance groove I; 1302. riveting a second nut; 1303. avoidance groove II; 1304. a harness fixing hole; 1305. a round hole II; 14. an end plate; 1401. bending first; 1402. a groove; 1403. a round hole III; 15. a lower side plate; 1501. bending II; 1502. slotting; 1503. riveting a third nut; 1504. an end face; 1505. avoidance groove III; 16. buffering foam.

Detailed Description

Specific embodiments of the present utility model will be further described below with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals.

It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

In order to make the contents of the present utility model more clearly understood, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in fig. 1, a metal-shell lithium iron phosphate single-car battery pack comprises a lower shell 1, a lithium iron phosphate aluminum shell battery core 2, a connecting sheet 3, an insulating plate 4, an insulating film 5, a sampling wire harness 6, a plastic steel belt 7, an upper cover 8, a handle 9, an electric quantity display unit 10, a discharge station 10, a protective plate 12, an upper side plate 13, an end plate 14, a lower side plate 15 and a buffer foam 16, wherein an expansion gap between the lithium iron phosphate aluminum shell battery cores 2 is kept by pasting the insulating plate 4 with the thickness of 1mm between the lithium iron phosphate aluminum shell battery cores 2, the lithium iron phosphate aluminum shell battery core 2 is between modules, the bottom of the lithium iron phosphate aluminum shell battery core 2 is insulated by pasting the insulating plate 4 with the thickness of 0.5mm between the lithium iron phosphate aluminum shell battery core 2 and the end plate 14, the upper side plate 13 and the lower side plate 15, an end plate 14 is arranged on the expansion surface of the lithium iron phosphate aluminum shell battery core 2, the upper side plate 13 and the lower side plate 15 are arranged on the narrow surface of the end plate 14, the end plate 14 and the upper side plate 13 and the lower side plate 15 are attached through a locking screw, then a plastic steel belt 7 is bound at the upper and lower clamping grooves, the end plate 15, the lithium iron phosphate aluminum shell battery core 2 and the lithium iron phosphate aluminum core 2 can be restrained by the end plate 13 and the lithium iron phosphate aluminum shell battery core 2, the connecting sheet 2 is also can be welded by adopting the connecting sheet 3, and the lithium iron phosphate aluminum phosphate power is welded in turn, and the insulating film 3 is welded in a large-shell, and the insulating film is welded by the insulating film is connected to the lithium iron phosphate battery core and the battery core is connected to the battery core 2; the lower shell 1 and the upper cover 8 are of natural stainless steel sheet metal structures, a handle 9, an electric quantity display unit 10 and a charging and discharging terminal 11 are arranged at the top of the upper cover 8, a bending shrinkage 8.1 is arranged at the bottom of the upper cover, the lower shell 1 is filled with inverted conical screw through holes 101 at the periphery of the upper end of the lower shell 1, the screws do not protrude from the surface after the countersunk screws are locked, and glue sealing is performed between the lower shell 1 and the upper cover 8, so that the IP67 waterproof requirement is met.

The battery pack for the lithium iron phosphate electric bicycle with the metal shell as shown in fig. 2 comprises a lower shell 1, screw through holes 101, a fixed block 102 and a first riveting nut 103, wherein the lower shell 1 is of a stainless steel sheet metal square barrel-shaped structure, 8 inverted cone-shaped screw through holes 101 are formed in the periphery of the upper end, an upper cover 8 is locked, and countersunk screws do not protrude out of the surface and have a flat appearance; two fixed blocks 102 are symmetrically welded on the inner wall of the lower shell 1 in the width direction, the fixed blocks 102 are L-shaped bent metal plates, one surface of each fixed block is attached to the inner wall of the lower shell 1, the joint is welded and fixed, the other surface of each fixed block is parallel to the bottom of the lower shell 1, and the first riveting nut 103 is used for supporting and fixing the upper side plate 13.

As shown in fig. 3, the metal-shell lithium iron phosphate battery pack for a bicycle comprises an upper cover 8, a bent shrinkage cavity 801, a waterproof nut 802, a waterproof nut 803, a square hole 804 and a round hole 805, wherein the upper cover 8 is of a stainless steel sheet metal structure, the four sides of the bottom of the upper cover 8 are bent shrinkage cavity 801, the waterproof nut 802 is riveted, the shrinkage cavity is inserted into a lower shell 1, structural adhesive is smeared in the middle of the upper cover, external water, gas, dust and the like are effectively prevented from entering the battery pack through gaps and nuts, a metal movable handle is arranged on the upper end face of the upper cover 8 by riveting the waterproof nut 803, a wire harness of a charging and discharging terminal 11 is led out from the round hole 805, the charging and discharging terminal 11 is fixed on the upper cover through a PG head, and the square hole 804 is used for installing an electric quantity display unit 10, and the battery pack electric quantity can be checked under the condition that the battery pack is not connected with an electric bicycle.

As shown in fig. 4, the metal-shell lithium iron phosphate battery pack for a bicycle comprises an upper side plate 13, a first avoidance groove 1301, a second riveting nut 1302, a second avoidance groove 1303, a wire harness fixing hole 1304 and a second round hole 1305, wherein the upper side plate 13 is of a stainless steel sheet metal structure, the first avoidance groove 1301, the second riveting nut 1302 and the lower side plate 14 are consistent in function, the first avoidance groove 1301 is formed in the unbent end face, the sampling wire harness 6 is avoided, the power wire harness goes out of the end of the lithium iron phosphate aluminum shell battery cell 2 upwards, the protection plate 12 and the charging and discharging terminal 11 are connected, the wire harness fixing hole 1304 is formed beside the second avoidance groove 1303, the wire harness can be bound on the upper side plate 13 to be fixed, the second round hole 1305 is formed in the two unbent end faces of the upper side plate 13 and used for locking the upper side plate 14 and the lower shell 1 fixing block 102, and the fixation of the lithium iron phosphate aluminum shell battery cell 2 is realized.

As shown in fig. 5, the metal-shell lithium iron phosphate battery pack for a bicycle comprises an end plate 14, a bent end 1401, a groove 1402 and a round hole three 1403, wherein the end plate 14 is of a stainless steel sheet metal structure, the two sides of the length direction of the end plate 14 are bent end 1401, the rigidity of the end plate 14 is increased, the height of the bent end 1401 is matched with the inner wall of the lower shell 1, the displacement of the battery module in the left-right direction can be limited, the contact surface of the end plate 14 and the lithium iron phosphate aluminum shell battery core 2 is adhered with an insulating plate 4 for insulation protection, two round holes three 1403 are respectively formed in the two width directions of the end plate 14 and are used for locking an upper side plate 13 and a lower side plate 15, the initial fixing of the lithium iron phosphate aluminum shell battery core 2 module is carried out, the deformation of the lithium iron phosphate aluminum shell battery core 2 caused by overlarge binding force of a plastic steel band 7 is avoided, the end face is respectively provided with two grooves 1402 for positioning and avoiding when the plastic steel band 7 is bound, when the lithium iron phosphate aluminum shell battery core 2 is in a negative difference, the size of the lithium iron phosphate aluminum shell battery core 2 module is small, the end plate 14 and the lithium iron phosphate aluminum shell battery core 2 is in a negative difference, the gap between the end plate 14 and the lithium iron phosphate aluminum shell battery core 2 is required to be fixed, and the lithium iron phosphate battery core 2 is not required to have a fixed, and the lithium iron phosphate battery core 2 has a gap, and the lithium iron phosphate battery core 2 is required to be fixed, and has a negative side.

As shown in fig. 6, the metal casing lithium iron phosphate battery pack for a bicycle comprises a lower side plate 15, a second bending 1501, a slot 1502, a third riveting nut 1503, end faces 1504 and a third avoiding slot 1505, wherein the lower side plate 15 is of a stainless steel sheet metal structure, two side plates of the lower side plate 15 are bent by the second bending 1501, the rigidity of the lower side plate 15 is increased, the height of the second bending 1501 is matched with the bottom of the lower shell 1, meanwhile, buffer foam 16 is adhered to the bottom of the lower side plate 15, the weight of a supporting module is supported, the four riveting nuts 1503 are riveted on the bending faces and used for locking an end plate 14 and a slot 1502 beside the nut, the positioning and avoiding of the binding of a plastic steel belt 7 are used, the contact face of the lower side plate 15 and the lithium iron phosphate aluminum shell battery core 2 is adhered with an insulating plate 4 for protection, the two end faces 1504 which are not bent by the lower side plate 15 are matched with the inner wall of the lower shell 1 to limit the displacement of the lithium iron phosphate aluminum shell battery core 2 in the front-back direction, and the end faces are simultaneously opened with the three avoiding slots 1505 for the lithium iron phosphate aluminum shell battery core 2 module to be put into the lower shell 1.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims (6)

1. A metal casing lithium iron phosphate battery pack for a bicycle is characterized in that: including inferior valve (1), lithium iron phosphate aluminum shell cell (2), connection piece (3), insulation board (4), insulating film (5), sampling pencil (6), plastic steel area (7), upper cover (8), handle (9), electric quantity display element (10), station (11) that discharges, protection shield (12), upper side board (13), end plate (14), lower side board (15) and buffering bubble cotton (16), be equipped with a plurality of lithium iron phosphate aluminum shell cell (2) in inferior valve (1), be equipped with insulation board (4) between lithium iron phosphate aluminum shell cell (2), end plate (14) are located lithium iron phosphate aluminum shell cell (2) both ends, and end plate (14) top and bottom are equipped with upper side board (13) and lower side board (15), end plate (14), upper side board (13) and lower side board (15) are fixed through the screw, plastic steel area (7) are located lithium iron phosphate aluminum shell cell (2) a week, connection piece (3) establish a plurality of lithium iron phosphate aluminum shell cell (2), lithium iron phosphate aluminum shell cell (6) locates lithium iron phosphate aluminum shell cell (8) top one side is located to be connected with lithium iron phosphate aluminum shell cell (8 top (8), the electric quantity display unit (10) is arranged at one end of the handle (9), the discharging station (11) is arranged at the other end of the electric quantity display unit, the protection plate (12) is arranged between the lithium iron phosphate aluminum shell battery core (2) and the upper cover (8), and the buffer foam (16) is adhered to the bottom of the lower side plate (15).

2. The metal-case lithium iron phosphate battery pack for a bicycle of claim 1, wherein: the novel riveting die is characterized in that a plurality of screw through holes (101) are formed in the periphery of the top of the lower shell (1), fixing blocks (102) are arranged on two sides of the inside of the lower shell (1) close to the opening, the fixing blocks (102) are L-shaped bending plates, and riveting nuts (103) are arranged at two ends of the fixing blocks (102).

3. The metal-case lithium iron phosphate battery pack for a bicycle of claim 1, wherein: the novel waterproof cover is characterized in that bending shrinkage openings (801) are formed in four sides of the bottom of the upper cover (8), the bending shrinkage openings (801) are formed in the first waterproof nuts (802), a plurality of second waterproof nuts (803) are arranged at one end of the top of the upper cover (8), a first round hole (805) is formed in one side of the second waterproof nuts (803), and a square hole (804) is formed in one end of the first round hole (805).

4. The metal-case lithium iron phosphate battery pack for a bicycle of claim 1, wherein: the wire harness bending machine is characterized in that a plurality of avoidance grooves I (1301) are formed in one circle of the upper side plate (13), two avoidance grooves II (1303) are formed in two right-angle positions at two ends of one side of the upper side plate (13), wire harness fixing holes (1304) are formed in the opposite sides of the avoidance grooves II (1303), a plurality of round holes II (1305) are formed in two end faces of the upper side plate (13), and riveting nuts II (1302) are arranged in bending of two sides of the upper side plate.

5. The metal-case lithium iron phosphate battery pack for a bicycle of claim 1, wherein: two sides of the end plate (14) are provided with bending one (1401), two ends of the end plate (14) are provided with two grooves (1402), and a round hole three (1403) is formed between the two grooves (1402).

6. The metal-case lithium iron phosphate battery pack for a bicycle of claim 1, wherein: the novel riveting die is characterized in that a plurality of bending second (1501) are arranged on two sides of the lower side plate (15), a slot (1502) is formed between the bending second, a riveting nut third (1503) is arranged in the bending second (1501), end faces (1504) are arranged at two ends of the lower side plate (15), and avoidance slots third (1505) are formed at two ends of the lower side plate (15).