Multi-protection buffering electric vehicle battery

Abstract

The invention relates to the technical field of electric vehicle batteries, in particular to a multi-protection buffering electric vehicle battery. According to the technical scheme, the multi-protection buffering electric vehicle battery comprises a battery box assembly, and further comprises a protection upper cover assembly and a hand lifting assembly; a protective upper cover assembly is arranged at the upper end of the battery box assembly; the two sides of the upper end face of the protective upper cover assembly are each provided with a hand lifting assembly. According to the lithium iron phosphate battery box disclosed by the invention, the lithium iron phosphate battery packs are wrapped and protected by the battery pack side edge protection plates on the inner side of the battery box shell, and meanwhile, the upper and lower layers of lithium iron phosphate battery packs are separated and supported by utilizing the high-temperature-resistant flame-retardant porous breathable partition plate, and the interior of the high-temperature-resistant flame-retardant porous breathable partition plate is porous, breathable, high-temperature-resistant and flame-retardant; when the lithium iron phosphate battery pack is subjected to thermal runaway, hot air can be discharged downwards from the collecting hole in the center of the high-temperature-resistant flame-retardant porous breathable partition plate along the exhaust channel and is finally discharged from the pressure release valve, and the problem that the whole lithium iron phosphate battery pack is damaged by high temperature and is subjected to collective thermal runaway is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric vehicle batteries, and in particular relates to an electric vehicle battery with multiple protection buffers. Background Art

[0002] During driving, the battery pack of an electric vehicle is easily damaged because the battery vehicle often vibrates violently and the battery pack is usually located at the lowest position of the vehicle chassis. Especially in rainy seasons and under conditions of poor visibility, the risk of chassis collision increases when driving through wading areas. The bottom of the battery pack may sag inward after being impacted, causing damage to the battery cell and electrolyte leakage, which in turn may cause serious dangers such as battery fire. In addition, the lower box of the battery pack of some models is integrated with a cooling plate. This design may cause damage to the cooling plate and coolant leakage in a collision.

[0003] Therefore, in view of the problem that the existing electric vehicle battery pack has low protection performance and the electric vehicle often vibrates violently during driving, which makes the internal battery pack easily damaged, a multi-protection buffer electric vehicle battery can be designed. Summary of the invention

[0004] In order to overcome the problem that the existing electric vehicle battery pack has low protection performance and the electric vehicle often vibrates violently during driving, causing the internal battery pack to be easily damaged.

[0005] The technical solution of the present invention is: a multi-protection buffered electric vehicle battery, including a battery box assembly, a protective upper cover assembly, and a handheld assembly; a protective upper cover assembly is arranged at the upper end of the battery box assembly; handheld assemblies are arranged on both sides of the upper end surface of the protective upper cover assembly; the battery box assembly includes a battery box shell, a battery box buffer edge, a high temperature resistant and flame retardant porous breathable partition, a lithium iron phosphate battery pack, a collecting hole, an exhaust channel, a battery pack side guard plate, a control circuit board compartment, a battery box cover, and a pressure relief valve; the protective upper cover assembly includes an upper cover, an upper cover buffer edge, a buffer pad, and a wiring electrode column.

[0006] Preferably, the lithium iron phosphate battery pack is wrapped and protected by the battery pack side guard plate on the inner side of the battery box shell, and at the same time, the upper and lower layers of the lithium iron phosphate battery packs are separated and supported by a high-temperature resistant flame retardant porous breathable partition. Moreover, since the interior of the high-temperature resistant flame retardant porous breathable partition is porous and breathable and high-temperature resistant and flame retardant, when the lithium iron phosphate battery pack has thermal runaway, the hot air can be discharged from the collecting hole in the center of the high-temperature resistant flame retardant porous breathable partition along the exhaust channel and finally discharged from the pressure relief valve, thereby effectively preventing the lithium iron phosphate battery pack from being damaged by high temperature as a whole and causing collective thermal runaway. This solves the problem that the existing electric vehicle battery pack has low protection performance and the internal battery pack is easily damaged due to severe vibration during driving of electric vehicles.

[0007] Preferably, battery box buffer edges are provided on all four external sides of the battery box shell, and the battery box buffer edges are fixedly connected to the battery box shell; a high temperature resistant flame retardant porous breathable partition is provided inside the battery box shell; lithium iron phosphate battery packs are provided at both upper and lower ends of the high temperature resistant flame retardant porous breathable partition.

[0008] Preferably, a collecting hole is provided inside the high temperature resistant flame retardant porous breathable partition; an exhaust channel is provided at the lower end of the collecting hole, and the exhaust channel is integrally formed with the inner wall of the battery box shell; a pressure relief valve is provided at the lower end of the exhaust channel, and the pressure relief valve is fixedly connected to the lower end surface of the battery box shell, and the pressure relief valve is connected to the exhaust channel.

[0009] Preferably, battery pack side guard plates are provided on both sides of the lithium iron phosphate battery pack, and the battery pack side guard plates are arranged in contact with the inner wall of the battery box shell; a battery box cover plate is provided on the upper end surface of the battery box shell, and the battery box cover plate is fixedly connected to the battery box shell.

[0010] Preferably, a control circuit board compartment is provided on the lower end surface of the battery box cover, and the circuit board inside the control circuit board compartment is electrically connected to the lithium iron phosphate battery pack.

[0011] Preferably, an upper cover is provided at the upper end of the battery box cover, and the upper cover is fixedly connected to the battery box cover; upper cover buffer edges are provided at the four corners of the upper cover, and the upper cover buffer edges and the upper cover are integrally formed devices; a buffer pad is provided on the upper end surface of the upper cover, and the buffer pad is adhesively connected to the upper cover; wiring electrode posts are provided at both the front and rear ends of the upper end surface of the upper cover, and the wiring electrode posts are electrically connected to the internal circuit power supply end of the control circuit board compartment.

[0012] Preferably, the handheld component includes a handheld board placement slot, a hollow handheld board, a connecting sheet metal, a bridge plastic bent piece, a soft rubber counterweight plate, and a handheld groove; handheld board placement slots are provided on both sides of the upper end surface of the upper cover, and the handheld board placement slots are integrally formed with the upper cover.

[0013] Preferably, a connecting sheet metal is provided on the inner side of the upper end surface of the hand-held board placement groove; a bridge plastic bent piece is provided at one end of the connecting sheet metal, and the bridge plastic bent piece is fixedly connected to the connecting sheet metal; a hollow hand-held board is provided at one end of the bridge plastic bent piece, and the hollow hand-held board is fixedly connected to the bridge plastic bent piece.

[0014] Preferably, the bridge plastic bend is a bendable plastic part; a soft rubber counterweight plate is provided below one outer end of the hollow handheld plate, and the soft rubber counterweight plate is fixedly connected to the hollow handheld plate; a hand carrying groove is provided on the lower end surface of one side of the soft rubber counterweight plate, and the hand carrying groove and the soft rubber counterweight plate are integrally formed.

[0015] Beneficial effects of the present invention:

[0016] 1. The existing electric vehicle battery pack has a problem that its internal battery pack is easily damaged due to its low protection performance and the electric vehicle often vibrates violently during driving; the lithium iron phosphate battery pack is wrapped and protected by the battery pack side guard plate on the inner side of the battery box shell, and at the same time, the upper and lower layers of the lithium iron phosphate battery pack are separated and supported by a high-temperature flame-retardant porous breathable partition. In addition, since the high-temperature flame-retardant porous breathable partition is porous and breathable and high-temperature flame-retardant, when the lithium iron phosphate battery pack has thermal runaway, the hot air can be discharged from the collecting hole in the center of the high-temperature flame-retardant porous breathable partition along the exhaust channel and finally discharged from the pressure relief valve, effectively avoiding the problem of collective thermal runaway of the lithium iron phosphate battery pack as a whole being damaged by high temperature; the problem that the existing electric vehicle battery pack has a problem that its internal battery pack is easily damaged due to its low protection performance and the electric vehicle often vibrates violently during driving;

[0017] 2. By setting up the protective upper cover assembly, the upper cover buffer edges around the upper cover are used to improve the buffering effect of its external impact, and the buffer pad is used to fill the structure of the space above the upper cover and improve the buffering performance of vertical vibration impact.

[0018] 3. Through the setting of the handheld component, the hollow handheld board of the handheld component can be lifted upwards to lift the entire device, which is convenient for the transportation and replacement of the entire device. At the same time, the hollow handheld board is embedded in the inside of the handheld board placement slot in a square state, so that the hollow handheld board will not occupy the space above the upper cover when not in use, thereby greatly improving the convenience of transportation and space utilization.

[0019] 4. This battery is composed of 20 3.2V lithium batteries connected in series to achieve a total voltage of 64V. The maximum discharge power can reach a maximum power of 3500W using the BMS battery active balancing management system, and the power output can reach a continuous power of 1750W. The working current is 45A and the charging current is 33A. It uses a small current induction to control the large current through the relay mode to increase the battery power and increase the battery discharge current to 120-500A. The power is increased to about 30KW, making the battery pack of this device easy to be widely used in the field of electric bicycles and automobiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic diagram of the overall three-dimensional structure of a multi-protection buffered electric vehicle battery of the present invention;

[0021] Figure 2 Shown is a schematic diagram of the overall side-view stereoscopic structure of a multi-protection buffer electric vehicle battery of the present invention;

[0022] Figure 3 Shown is a bottom-up stereoscopic structural schematic diagram of a protective upper cover assembly of a multi-protection buffer electric vehicle battery of the present invention;

[0023] Figure 4 Shown is a schematic diagram of a cross-sectional three-dimensional structure of a battery box assembly of a multi-protection buffer electric vehicle battery of the present invention;

[0024] Figure 5 Shown is a bottom-up stereoscopic structural schematic diagram of a battery box assembly of a multi-protection buffered electric vehicle battery of the present invention;

[0025] Figure 6 Shown is a bottom-up stereoscopic structural schematic diagram of a portable assembly of an electric vehicle battery with multiple protection buffers according to the present invention.

[0026] The markings in the attached drawings are: 1. battery box assembly; 2. protective upper cover assembly; 3. handheld assembly; 101. battery box shell; 102. battery box buffer edge; 103. high temperature resistant and flame retardant porous breathable partition; 104. lithium iron phosphate battery pack; 105. collecting hole; 106. exhaust channel; 107. battery pack side guard plate; 108. control circuit board compartment; 109. battery box cover; 110. pressure relief valve; 201. upper cover; 202. upper cover buffer edge; 203. buffer pad; 204. wiring electrode column; 301. handheld board placement slot; 302. hollow handheld board; 303. connecting sheet metal; 304. bridge plastic bend; 305. soft rubber counterweight; 306. handheld groove. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] See also Figure 1-6 The present invention provides an embodiment: a multi-protection buffered electric vehicle battery, comprising a battery box assembly 1, and also comprising a protective upper cover assembly 2 and a portable assembly 3; the upper end of the battery box assembly 1 is provided with a protective upper cover assembly 2; both sides of the upper end surface of the protective upper cover assembly 2 are provided with portable assemblies 3; the battery box assembly 1 comprises a battery box shell 101, a battery box buffer edge 102, a high temperature resistant and flame retardant porous breathable partition 103, a lithium iron phosphate battery pack 104, a collecting hole 105, an exhaust channel 106, a battery pack side guard plate 107, a control circuit board compartment 108, a battery box cover 109, and a pressure relief valve 110; the protective upper cover assembly 2 comprises an upper cover 201, an upper cover buffer edge 202, a buffer pad 203, and a wiring electrode column 204.

[0029] See also Figure 1-6In this embodiment, battery box buffer edges 102 are provided on all four sides of the exterior of the battery box shell 101, and the battery box buffer edges 102 are fixedly connected to the battery box shell 101; a high temperature resistant flame retardant porous breathable baffle 103 is provided inside the battery box shell 101; lithium iron phosphate battery packs 104 are provided at both upper and lower ends of the high temperature resistant flame retardant porous breathable baffle 103; a collecting hole 105 is provided inside the high temperature resistant flame retardant porous breathable baffle 103; an exhaust channel 106 is provided at the lower end of the collecting hole 105, and the exhaust channel 106 is integrally formed with the inner wall of the battery box shell 101; a pressure relief valve 110 is provided at the lower end of the exhaust channel 106, and the pressure relief valve 110 is fixed to the lower end surface of the battery box shell 101 The battery pack 104 is connected, and the pressure relief valve 110 is connected to the exhaust channel 106; battery pack side guard plates 107 are provided on both sides of the lithium iron phosphate battery pack 104, and the battery pack side guard plates 107 are arranged in contact with the inner wall of the battery box shell 101; the upper end surface of the battery box shell 101 is provided with a battery box cover 109, and the battery box cover 109 is fixedly connected to the battery box shell 101; the lower end surface of the battery box cover 109 is provided with a control circuit board compartment 108, and the circuit board inside the control circuit board compartment 108 is electrically connected to the lithium iron phosphate battery pack 104; an upper cover 201 is provided on the upper end of the battery box cover 109, and the upper cover 201 is fixedly connected to the battery box cover 109; the four corners of the upper cover 201 are provided with upper cover buffers The upper cover 201 has a punching edge 202, and the upper cover buffer edge 202 is integrally formed with the upper cover 201; the upper end surface of the upper cover 201 is provided with a buffer pad 203, and the buffer pad 203 is adhesively connected to the upper cover 201; the upper end surface of the upper cover 201 is provided with wiring electrode columns 204 at both ends, and the wiring electrode columns 204 are electrically connected to the internal circuit power supply end of the control circuit board compartment 108; the handheld component 3 includes a handheld board placement slot 301, a hollow handheld board 302, a connecting sheet metal 303, a bridge plastic bent piece 304, a soft rubber counterweight plate 305, and a handheld groove 306; both sides of the upper end surface of the upper cover 201 are provided with handheld board placement slots 301, and the handheld board placement slots 301 are integrally formed with the upper cover 201; the handheld board placement slot A connecting sheet metal 303 is provided on the inner side of the upper end surface of the slot 301; a bridge plastic bent piece 304 is provided at one end of the connecting sheet metal 303, and the bridge plastic bent piece 304 is fixedly connected to the connecting sheet metal 303; a hollow hand-held plate 302 is provided at one end of the bridge plastic bent piece 304, and the hollow hand-held plate 302 is fixedly connected to the bridge plastic bent piece 304; the bridge plastic bent piece 304 is a bendable plastic piece; a soft rubber counterweight plate 305 is provided below one end of the outer side of the hollow hand-held plate 302, and the soft rubber counterweight plate 305 is fixedly connected to the hollow hand-held plate 302; a hand-carrying groove 306 is provided on the lower end surface of one side of the soft rubber counterweight plate 305, and the hand-carrying groove 306 and the soft rubber counterweight plate 305 are integrally formed.

[0030] During operation, the lithium iron phosphate battery pack 104 is wrapped and protected by the battery pack side guard plate 107 on the inner side of the battery box shell 101, and at the same time, the upper and lower layers of the lithium iron phosphate battery pack 104 are separated and supported by the high temperature resistant flame retardant porous breathable partition 103. In addition, since the high temperature resistant flame retardant porous breathable partition 103 is porous and breathable and high temperature resistant and flame retardant, when the lithium iron phosphate battery pack 104 has thermal runaway, the hot air can be discharged from the collecting hole 105 in the center of the high temperature resistant flame retardant porous breathable partition 103 along the exhaust channel 106, and finally discharged from the pressure relief valve 110, which effectively avoids the problem of collective thermal runaway of the lithium iron phosphate battery pack 104 being damaged by high temperature as a whole; it solves the problem of existing electric vehicle battery packs. , because its protection performance is low, and electric vehicles often vibrate violently during driving, causing the problem that the internal battery pack is easily damaged. The hollow hand-held plate 302 of the hand-held component 3 can be lifted upward to lift the entire device, which is convenient for the transportation and replacement of the entire device. At the same time, the hollow hand-held plate 302 is embedded in the inside of the hand-held plate placement groove 301 in a square state, so that the hollow hand-held plate 302 does not occupy the space above the upper cover 201 when not in use, thereby greatly improving the convenience of transportation and space utilization. The upper cover buffer ridges 202 around the upper cover 201 are used to improve the buffering effect of its external impact, and the buffer pad 203 is used to fill the structure of the space above the upper cover 201 and improve the buffering performance of vertical vibration impact;

[0031] Next, the battery is composed of 20 3.2V lithium batteries connected in series to achieve a total voltage of 64V. The maximum discharge power can reach a maximum power of 3500W using the BMS battery active balancing management system, and the power output is continuously at 1750W. The working current is 45A and the charging current is 33A. The small current induction is used to control the large current through the relay mode to increase the battery power, increase the battery discharge current to 120-500A, and increase the power to about 30KW, making the battery pack of this device easy to be widely used in the field of electric bicycles and automobiles.

[0032] Through the above steps, the lithium iron phosphate battery pack 104 is wrapped and protected by the battery pack side guard plate 107 on the inner side of the battery box shell 101, and at the same time, the upper and lower layers of the lithium iron phosphate battery pack 104 are separated and supported by the high temperature resistant flame retardant porous breathable partition 103, and because the interior of the high temperature resistant flame retardant porous breathable partition 103 is porous and breathable and high temperature resistant and flame retardant, when the lithium iron phosphate battery pack 104 has thermal runaway, the hot air can be discharged from the collecting hole 105 in the center of the high temperature resistant flame retardant porous breathable partition 103 along the exhaust channel 106, and finally discharged from the pressure relief valve 110, effectively avoiding the problem of the lithium iron phosphate battery pack 104 being damaged by high temperature as a whole and causing collective thermal runaway, and avoiding the problem that the existing electric vehicle battery pack has low protection performance and the electric vehicle often has severe vibration during driving, causing the internal battery pack to be easily damaged.

[0033] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A multi-protection buffered electric vehicle battery, comprising a battery box assembly (1), characterized in that: The invention also comprises a protective upper cover assembly (2) and a hand-held assembly (3); the upper end of the battery box assembly (1) is provided with the protective upper cover assembly (2); both sides of the upper end surface of the protective upper cover assembly (2) are provided with hand-held assemblies (3); the battery box assembly (1) comprises a battery box shell (101), a battery box buffer edge (102), a high temperature resistant flame retardant porous breathable partition (103), a lithium iron phosphate battery pack (104), a collecting hole (105), an exhaust channel (106), a battery pack side guard plate (107), a control circuit board compartment (108), a battery box cover plate (109), and a pressure relief valve (110); the protective upper cover assembly (2) comprises an upper cover (201), an upper cover buffer edge (202), a buffer pad (203), and a wiring electrode column (204).

2. The electric vehicle battery with multiple protection buffers according to claim 1, characterized in that: Battery box buffer edges (102) are arranged on the four outer sides of the battery box shell (101), and the battery box buffer edges (102) are fixedly connected to the battery box shell (101); a high temperature resistant flame retardant porous breathable partition (103) is arranged inside the battery box shell (101); and lithium iron phosphate battery packs (104) are arranged at the upper and lower ends of the high temperature resistant flame retardant porous breathable partition (103).

3. The electric vehicle battery with multiple protection buffers according to claim 2, characterized in that: A collecting hole (105) is provided inside the high temperature resistant flame retardant porous air permeable partition (103); an exhaust channel (106) is provided at the lower end of the collecting hole (105), and the exhaust channel (106) is integrally formed with the inner wall of the battery box shell (101); a pressure relief valve (110) is provided at the lower end of the exhaust channel (106), and the pressure relief valve (110) is fixedly connected to the lower end surface of the battery box shell (101), and the pressure relief valve (110) is communicated with the exhaust channel (106).

4. The electric vehicle battery with multiple protection buffers according to claim 2, characterized in that: Battery pack side guard plates (107) are provided on both sides of the lithium iron phosphate battery pack (104), and the battery pack side guard plates (107) are arranged in contact with the inner wall of the battery box shell (101); a battery box cover plate (109) is provided on the upper end surface of the battery box shell (101), and the battery box cover plate (109) is fixedly connected to the battery box shell (101).

5. The electric vehicle battery with multiple protection buffers according to claim 4, characterized in that: A control circuit board compartment (108) is provided on the lower end surface of the battery box cover (109), and the circuit board inside the control circuit board compartment (108) is electrically connected to the lithium iron phosphate battery pack (104).

6. The electric vehicle battery with multiple protection buffers according to claim 4, characterized in that: An upper cover (201) is provided at the upper end of the battery box cover (109), and the upper cover (201) is fixedly connected to the battery box cover (109); upper cover buffer edges (202) are provided at the four corners of the upper cover (201), and the upper cover buffer edges (202) and the upper cover (201) are integrally formed; a buffer pad (203) is provided on the upper end surface of the upper cover (201), and the buffer pad (203) is adhesively connected to the upper cover (201); and wiring electrode posts (204) are provided at both the front and rear ends of the upper end surface of the upper cover (201), and the wiring electrode posts (204) are electrically connected to the internal circuit power supply end of the control circuit board compartment (108).

7. The electric vehicle battery with multiple protection buffers according to claim 6, characterized in that: The hand-held component (3) comprises a hand-held plate placement groove (301), a hollow hand-held plate (302), a connecting sheet metal (303), a bridge plastic bent piece (304), a soft rubber weight plate (305), and a hand-held groove (306); both sides of the upper end surface of the upper cover (201) are provided with hand-held plate placement grooves (301), and the hand-held plate placement grooves (301) and the upper cover (201) are integrally formed.

8. The electric vehicle battery with multiple protection buffers according to claim 7, characterized in that: A connecting sheet metal (303) is arranged on the inner side of the upper end surface of the hand-held board placement groove (301); a bridge plastic bent piece (304) is arranged at one end of the connecting sheet metal (303), and the bridge plastic bent piece (304) is fixedly connected to the connecting sheet metal (303); a hollow hand-held board (302) is arranged at one end of the bridge plastic bent piece (304), and the hollow hand-held board (302) is fixedly connected to the bridge plastic bent piece (304).

9. The electric vehicle battery with multiple protection buffers according to claim 8, characterized in that: The bridge plastic bent piece (304) is a bendable plastic piece; a soft rubber weight plate (305) is arranged below one end of the outer side of the hollow hand-held plate (302), and the soft rubber weight plate (305) is fixedly connected to the hollow hand-held plate (302); a hand-held groove (306) is arranged on a lower end surface of one side of the soft rubber weight plate (305), and the hand-held groove (306) and the soft rubber weight plate (305) are integrally formed.

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