CN215795342U

CN215795342U - Power battery protection device

Info

Publication number: CN215795342U
Application number: CN202121597792.7U
Authority: CN
Inventors: 何刚; 何逸伟
Original assignee: Nanjing Xunlu Technology Industry Co ltd; Nanjing University of Information Science and Technology
Current assignee: Nanjing Xunlu Technology Industry Co ltd; Nanjing University of Information Science and Technology
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-02-11
Anticipated expiration: 2031-07-14

Abstract

The utility model relates to a power battery protection device, wherein a horizontal bottom fixing plate is arranged in a shell, and a second damping mechanism for supporting and damping is arranged below the bottom fixing plate. The bottom fixing plate is provided with two groups of longitudinally arranged battery fixing pieces, the battery fixing pieces are evenly arranged at intervals, the two groups of battery fixing pieces are in positive and opposite one to one, the end face, facing the positive and opposite battery fixing pieces, of each battery fixing piece is provided with a first straight groove, the top of each first straight groove is communicated with the outside, and an installation space of the power battery is formed between every two positive and opposite battery fixing pieces. A plurality of battery mounting tops are provided with the solid board of horizontally top, and a plurality of first damper are fixed uniformly between solid board of top and upper cover plate. The utility model can avoid the problems of collision and line winding between power batteries. The first damping mechanism and the second damping mechanism can buffer the power battery in the vertical direction, and the power battery is protected from being damaged.

Description

Power battery protection device

Technical Field

The utility model belongs to the technical field of lithium ion batteries, and relates to a power battery protection device.

Background

The power battery is a high-energy battery, the negative electrode of the power battery generally adopts graphite, and the positive electrode of the power battery adopts lithium iron phosphate, lithium cobaltate, lithium titanate and the like, so that the power battery has the advantages of high energy, high power supply voltage, wide working temperature range, long storage life and the like.

Power battery need protect it in transportation and installation use, and current safeguard measure is only to place power battery in protecting sheathing, and power battery takes place to rock or collide with easily in protecting sheathing, leads to the battery to damage. In addition, most of the conventional power batteries are battery packs formed by connecting a plurality of batteries in series, and the plurality of batteries are easy to collide with each other, so that the problem of winding of lines and the like is caused.

The inventors have found that there is no effective solution in the prior art to solve the above problems.

Disclosure of Invention

In view of the problems pointed out by the background art, the utility model provides a power battery protection device.

The technical scheme adopted by the utility model is as follows:

a power battery protection device comprises a cubic shell with an open upper part and an upper cover plate matched with the shell, wherein a horizontal bottom fixing plate is arranged in the shell, and a second damping mechanism for supporting and damping is arranged below the bottom fixing plate; the bottom fixing plate is provided with two groups of longitudinally arranged battery fixing pieces, the battery fixing pieces are uniformly arranged at intervals, the two groups of battery fixing pieces are opposite one by one, the end surface of each battery fixing piece facing the opposite battery fixing piece is provided with a first straight groove, the top of each first straight groove is communicated with the outside, and an installation space of a power battery is formed between every two opposite battery fixing pieces; the top of the battery fixing pieces is provided with a horizontal top fixing plate, and a plurality of first damping mechanisms are uniformly and fixedly arranged between the top fixing plate and the upper cover plate.

Furthermore, the power battery protection device also comprises a reciprocating driving mechanism which is used for driving the two groups of battery fixing pieces to move oppositely and clamping and fixing the power battery; the reciprocating driving mechanism comprises a screw rod, a first screw rod nut, a second screw rod nut and two mounting plates, the bottom fixing plate is hollow, the screw rod is rotatably arranged in the bottom fixing plate, the right end of the screw rod penetrates through the bottom fixing plate and extends out of the shell, a turntable for rotating the screw rod is fixed at the right end of the screw rod, and a handheld handle is arranged at the edge position of the outer end face of the turntable; a second straight groove for the screw rod to move up and down is formed in the right end face of the shell, a convex column is integrally arranged on the left end face of the bottom fixing plate, and a third straight groove for the convex column to move up and down is correspondingly formed in the inner wall face of the shell; the left and right screw threads of the screw rod are opposite in direction, the first screw nut is matched with the screw thread of the left half part of the screw rod and sleeved on the left half part of the screw rod, the second screw nut is matched with the screw thread of the right half part of the screw rod and sleeved on the right half part of the screw rod, the two mounting plates are longitudinally fixed on the two screw nuts in a one-to-one correspondence mode respectively, and a group of battery fixing parts are fixed on the upper end surfaces of the two mounting plates respectively; and the bottom fixing plate is provided with long holes for the corresponding mounting plate to move left and right at the positions of the two screw rod nuts, and the long holes are communicated with a hollow cavity in the bottom fixing plate.

Further, the first damping mechanism comprises a sleeve, a second spring, a piston and a piston rod, wherein the upper part of the sleeve is open, and the bottom of the sleeve is closed; the second spring and the piston are arranged in the sleeve, the upper portion of the sleeve is connected with the upper cover plate in a welded mode, the two ends of the second spring are connected with the upper cover plate and the piston in a welded mode respectively, the piston rod penetrates through the sleeve from bottom to top and is connected with the piston in a welded mode, and the bottom of the piston rod is connected with the top fixing plate in a vertical welded mode.

Furthermore, the second damping mechanism comprises a first spring and two first sliding blocks, a transverse guide rod is fixed in the shell at a position below the bottom fixing plate, the two first sliding blocks are respectively provided with holes matched with the guide rod and are slidably connected to the guide rod, two first connecting rods are hinged to the middle position of the lower end face of the bottom fixing plate, and the two first connecting rods are respectively hinged to the tops of the two first sliding blocks; the first spring is arranged between the two first sliding blocks, and two ends of the first spring are fixedly connected with the two first sliding blocks respectively.

Furthermore, the second damping mechanism further comprises two first magnets and two second magnets, and the two first magnets are respectively and fixedly arranged at the positions, below the guide rod, of the left end face of the left first sliding block and opposite to the inner wall surface of the shell; the two second magnets are respectively and fixedly arranged at the positions, below the guide rod, of the right end face of the right first sliding block and opposite to the inner wall surface of the shell; the two first magnets repel each other, and the two second magnets repel each other.

Furthermore, the second damping mechanism comprises a third spring and two second sliding blocks, a transverse sliding groove matched with the second sliding blocks is formed in the bottom in the shell, and the two second sliding blocks are slidably arranged in the sliding groove; the left side and the right side of the lower end surface of the bottom fixed plate are respectively hinged with a second connecting rod, and the two second connecting rods are respectively hinged with the tops of the two second sliding blocks; the third spring is arranged between the two second sliding blocks, and two ends of the third spring are fixedly connected with the two second sliding blocks respectively.

Furthermore, the second damping mechanism further comprises two third magnets and two fourth magnets, the two third magnets are fixedly arranged on the left end face of the left second sliding block and the left end of the sliding groove respectively, and the two fourth magnets are fixedly arranged on the right end face of the right second sliding block and the right end of the sliding groove respectively; the two third magnets repel each other, and the two fourth magnets repel each other.

Furthermore, a group of longitudinal third damping mechanisms are further arranged between the lower end face of the bottom fixing plate and the inner bottom face of the shell at the left side and the right side of the second damping mechanism respectively, the third damping mechanisms in the same group are evenly spaced, the third damping mechanisms are identical to the first damping mechanisms in structure, sleeves of the third damping mechanisms are connected with the inner bottom face of the shell in a welding mode, and piston rods of the third damping mechanisms are connected with the lower end face of the bottom fixing plate in a welding mode.

Furthermore, a plurality of heat dissipation holes are uniformly formed in the top and the bottom of the shell along the circumferential direction.

Further, the upper cover plate is hinged with the shell.

The utility model has the beneficial effects that:

according to the utility model, the power batteries are fixed in the installation space formed by the two battery fixing parts, and a gap is reserved between the power batteries, so that collision between the power batteries can be avoided, the problem of winding of a circuit is avoided, and meanwhile, the heat dissipation of the power batteries is facilitated. In addition, when the casing receives external force to strike, first damper and second damper can carry out the buffering of upper and lower direction to power battery, reduce the impact force to power battery's influence, protect power battery not damaged.

Drawings

Fig. 1 is a schematic structural diagram of a power battery protection device according to a first embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of a battery holder;

fig. 4 is a schematic structural diagram of a power battery protection device according to a second embodiment;

fig. 5 is a schematic perspective view of the power battery protection device of the present invention;

reference numerals: 1-shell, 2-upper cover plate, 3-bottom fixing plate, 4-convex column, 5-lead screw, 6-first lead screw nut, 7-second lead screw nut, 8-mounting plate, 9-battery fixing piece, 10-guide rod, 11-first slide block, 12-first connecting rod, 13-first spring, 14-first magnet, 15-second magnet, 16-top fixing plate, 17-sleeve, 18-second spring, 19-piston, 20-piston rod, 21-sliding chute, 22-third spring, 23-second slide block, 24-second connecting rod, 25-third magnet, 26-fourth magnet, 27-rotating disk, 28-radiating hole.

Detailed Description

The power battery protection device of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1, 3 and 5, the power battery protection device comprises a cubic housing 1 with an open upper part and an upper cover plate 2 matched with the housing 1, wherein the upper cover plate 2 is hinged with the housing 1, and the top and the bottom of the housing 1 are respectively and uniformly provided with a plurality of heat dissipation holes 28 along the circumferential direction.

A horizontal bottom fixing plate 3 is arranged in the shell 1, and a second damping mechanism used for supporting and damping is arranged below the bottom fixing plate 3. The bottom fixing plate 3 is provided with two groups of longitudinally arranged battery fixing parts 9 (see fig. 1 and 5), the battery fixing parts 9 are uniformly arranged at intervals, the two groups of battery fixing parts 9 are in positive opposition one by one, the end faces, facing the positive opposition battery fixing parts 9, of each battery fixing part 9 are respectively provided with a first straight groove, the top of each first straight groove is communicated with the outside (see fig. 3 and 5), and an installation space of a power battery is formed between every two positive opposition battery fixing parts 9. A horizontal top fixing plate 16 is arranged at the top of the battery fixing pieces 9, and a plurality of first damping mechanisms are uniformly and fixedly arranged between the top fixing plate 16 and the upper cover plate 2.

In this embodiment, the power battery protection device further includes a reciprocating driving mechanism for driving the two sets of battery fixing members 9 to move towards each other and clamp and fix the power battery. The reciprocating driving mechanism comprises a screw rod 5, a first screw rod nut 6, a second screw rod nut 7 and two mounting plates 8, the bottom fixing plate 3 is hollow, the screw rod 5 is rotatably arranged inside the bottom fixing plate 3, the right end of the screw rod 5 penetrates through the bottom fixing plate 3 and extends out of the shell 1, a rotary table 27 used for rotating the screw rod 5 is fixedly welded at the right end part of the screw rod 5, and a handheld handle is arranged at the edge position of the outer end face of the rotary table 27, as shown in fig. 5. The right end face of the shell 1 is provided with a second straight groove for the screw rod 5 to move up and down, the left end face of the bottom fixing plate 3 is integrally provided with a convex column 4, and the inner wall face of the shell 1 is correspondingly provided with a third straight groove for the convex column 4 to move up and down. The left and right screw threads of the screw rod 5 are opposite in direction, the first screw nut 6 is matched with the screw thread of the left half part of the screw rod 5 and is sleeved on the left half part of the screw rod 5, the second screw nut 7 is matched with the screw thread of the right half part of the screw rod 5 and is sleeved on the right half part of the screw rod 5, the two mounting plates 8 are longitudinally fixed on the two screw nuts in a one-to-one correspondence mode respectively, and a group of battery fixing parts 9 are fixed on the upper end faces of the two mounting plates 8 respectively. The bottom fixing plate 3 is provided with two long holes at the positions of the two screw rod nuts for the corresponding mounting plate 8 to move left and right, and the long holes are communicated with a hollow cavity in the bottom fixing plate 3.

As shown in fig. 2, the first damping mechanism includes a sleeve 17, a second spring 18, a piston 19, and a piston rod 20, and the sleeve 17 is open at an upper portion and closed at a bottom portion. The second spring 18 and the piston 19 are both arranged in the sleeve 17, the upper part of the sleeve 17 is connected with the upper cover plate 2 in a welding way, two ends of the second spring 18 are respectively connected with the bottom of the upper cover plate 2 and the piston 19 in a welding way, the piston rod 20 penetrates through the sleeve 17 from bottom to top and is connected with the piston 19 in a welding way, and the bottom of the piston rod 20 is vertically connected with the top fixing plate 16 in a welding way.

Referring to fig. 1, the second damping mechanism includes a first spring 13 and two first sliders 11, a transverse guide rod 10 is welded and fixed in the housing 1 at a position below the bottom fixing plate 3, the two first sliders 11 are respectively provided with holes matched with the guide rod 10 and slidably sleeved on the guide rod 10, two first connecting rods 12 are hinged to the middle position of the lower end face of the bottom fixing plate 3, and the two first connecting rods 12 are respectively hinged to the tops of the two first sliders 11. The first spring 13 is arranged between the two first sliding blocks 11, and two ends of the first spring 13 are respectively welded and fixed with the two first sliding blocks 11. In this embodiment, the second damping mechanism further includes two first magnets 14 and two second magnets 15, and the two first magnets 14 are respectively and fixedly disposed at positions where the left end surface of the left first slider 11 is located below the guide bar 10 and opposite to the inner wall surface of the housing 1. The two second magnets 15 are respectively fixed on the right end face of the right first slide block 11 at the position below the guide rod 10 and opposite to the inner wall face of the shell 1. The first magnets 14 repel each other, and the second magnets 15 repel each other. In this embodiment, the magnet is fixed by adhesion.

The working principle of the first embodiment is as follows:

the upper cover plate 2 is opened, the power batteries are placed between every two opposite battery fixing pieces 9, the rotating disc 27 is rotated through the handheld handle to drive the screw rod 5 to rotate, the first screw rod nut 6 and the second screw rod nut 7 move oppositely, so that the two sets of battery fixing pieces 9 are driven to move oppositely, the power batteries are clamped and fixed, the power batteries cannot shake in the left and right directions, and damage caused by collision of the power batteries is avoided. And set up with even interval between 9 battery fixing parts of group, can make unable collision take place between the power battery, avoid appearing the circuit winding scheduling problem, increased the distance between the power battery simultaneously, convenient heat dissipation.

When the shell 1 is impacted by external force, the power battery is buffered in the vertical direction through the first damping mechanism and the second damping mechanism, the impact force on the power battery is reduced, and the power battery is protected from being damaged. Specifically, when the top fixed plate 16 moves upward, the piston rod 20 of the first damping mechanism retracts into the sleeve 17 to press the second spring 18, and the second spring 18 provides an elastic force in the opposite direction to restore the top fixed plate 16 to the original position. When the bottom fixing plate 3 moves downwards, the two first connecting rods 12 are extruded downwards, the first connecting rods 12 drive the two first sliding blocks 11 to move back to back, the first springs 13 are stretched, the first springs 13 provide resilience force, and the bottom fixing plate 3 is restored by matching with repulsive force between the two first magnets 14 and the two second magnets 15.

Example two

The second embodiment is different from the first embodiment in the structure of the second damper mechanism.

Specifically, referring to fig. 4, the second damping mechanism includes a third spring 22 and two second sliding blocks 23, a transverse sliding slot 21 matched with the second sliding blocks 23 is formed at the bottom in the housing 1, and the two second sliding blocks 23 are slidably disposed in the sliding slot 21. The left side and the right side of the lower end surface of the bottom fixed plate 3 are respectively hinged with a second connecting rod 24, and the two second connecting rods 24 are respectively hinged with the tops of the two second sliding blocks 23. The third spring 22 is arranged between the two second sliding blocks 23, and two ends of the third spring 22 are respectively welded and fixed with the two second sliding blocks 23. In this embodiment, the second damping mechanism further includes two third magnets 25 and two fourth magnets 26, the two third magnets 25 are respectively and fixedly disposed on the left end surface of the left second sliding block 23 and the left end of the sliding slot 21, and the two fourth magnets 26 are respectively and fixedly disposed on the right end surface of the right second sliding block 23 and the right end of the sliding slot 21. The third magnets 25 repel each other, and the fourth magnets 26 repel each other. In this embodiment, the magnet is fixed by adhesion.

As an improvement of the second embodiment, a set of longitudinal third damping mechanisms is further respectively arranged between the lower end surface of the bottom fixed plate 3 and the inner bottom surface of the shell 1 at the left side and the right side of the second damping mechanism, the same set of third damping mechanisms are evenly spaced, the third damping mechanisms are identical to the first damping mechanisms in structure, a sleeve of each third damping mechanism is connected with the inner bottom surface of the shell 1 in a welded manner, and a piston rod of each third damping mechanism is connected with the lower end surface of the bottom fixed plate 3 in a welded manner.

It is understood that the working principle of the second embodiment is substantially the same as that of the first embodiment, and the description thereof is omitted.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined by the appended claims, the description, and equivalents thereof.

Claims

1. A power battery protection device comprises a cubic shell (1) with an open upper part and an upper cover plate (2) matched with the shell (1), and is characterized in that a horizontal bottom fixing plate (3) is arranged in the shell (1), and a second damping mechanism for supporting and damping is arranged below the bottom fixing plate (3); two groups of longitudinally arranged battery fixing pieces (9) are arranged on the bottom fixing plate (3), the battery fixing pieces (9) are uniformly arranged at intervals, the two groups of battery fixing pieces (9) are in positive opposition one by one, a first straight groove is formed in the end face, facing the positive opposition battery fixing piece (9), of each battery fixing piece (9), the top of the first straight groove is communicated with the outside, and an installation space of a power battery is formed between every two positive opposition battery fixing pieces (9); the top of the battery fixing pieces (9) is provided with a horizontal top fixing plate (16), and a plurality of first damping mechanisms are uniformly and fixedly arranged between the top fixing plate (16) and the upper cover plate (2).

2. The power battery protection device according to claim 1, further comprising a reciprocating driving mechanism for driving the two sets of battery fixing members (9) to move towards each other and clamping and fixing the power battery; the reciprocating driving mechanism comprises a screw rod (5), a first screw rod nut (6), a second screw rod nut (7) and two mounting plates (8), the bottom fixing plate (3) is hollow, the screw rod (5) is rotatably arranged in the bottom fixing plate (3), the right end of the screw rod (5) penetrates through the bottom fixing plate (3) and extends out of the shell (1), a rotary table (27) used for rotating the screw rod (5) is fixed at the right end of the screw rod (5), and a handheld handle is arranged at the edge position of the outer end face of the rotary table (27); a second straight groove for the screw rod (5) to move up and down is formed in the right end face of the shell (1), a convex column (4) is integrally formed in the left end face of the bottom fixing plate (3), and a third straight groove for the convex column (4) to move up and down is correspondingly formed in the inner wall face of the shell (1); the left and right screw threads of the screw rod (5) are opposite in direction, a first screw nut (6) is matched with the screw thread of the left half part of the screw rod (5) and is sleeved on the left half part of the screw rod (5), a second screw nut (7) is matched with the screw thread of the right half part of the screw rod (5) and is sleeved on the right half part of the screw rod (5), the two mounting plates (8) are longitudinally fixed on the two screw nuts in a one-to-one correspondence mode respectively, and a group of battery fixing parts (9) are fixed on the upper end faces of the two mounting plates (8) respectively; the bottom fixing plate (3) is provided with long holes for the left and right movement of the corresponding mounting plate (8) at the positions of the two screw rod nuts, and the long holes are communicated with a hollow cavity in the bottom fixing plate (3).

3. The power battery protection device according to claim 1, wherein the first damping mechanism comprises a sleeve (17), a second spring (18), a piston (19) and a piston rod (20), the sleeve (17) is open at the upper part and closed at the bottom; the second spring (18) and the piston (19) are arranged in the sleeve (17), the upper portion of the sleeve (17) is connected with the upper cover plate (2) in a welding mode, two ends of the second spring (18) are respectively connected with the upper cover plate (2) and the piston (19) in a welding mode, the piston rod (20) penetrates through the sleeve (17) from bottom to top and is connected with the piston (19) in a welding mode, and the bottom of the piston rod (20) is connected with the top fixing plate (16) in a vertical welding mode.

4. The power battery protection device according to any one of claims 1 to 3, wherein the second damping mechanism comprises a first spring (13) and two first sliding blocks (11), a transverse guide rod (10) is fixed in the shell (1) at a position below the bottom fixing plate (3), the two first sliding blocks (11) are respectively provided with holes matched with the guide rod (10) and are slidably connected to the guide rod (10), two first connecting rods (12) are hinged to the middle position of the lower end surface of the bottom fixing plate (3), and the two first connecting rods (12) are respectively hinged to the tops of the two first sliding blocks (11); the first spring (13) is arranged between the two first sliding blocks (11), and two ends of the first spring (13) are fixedly connected with the two first sliding blocks (11) respectively.

5. The power battery protection device according to claim 4, wherein the second damping mechanism further comprises two first magnets (14) and two second magnets (15), the two first magnets (14) are respectively and fixedly arranged at positions, under the guide rod (10), of the left end face of the left first sliding block (11) and opposite to the inner wall face of the shell (1); the two second magnets (15) are respectively and fixedly arranged at the positions, opposite to the inner wall surface of the shell (1), of the right end surface of the right first slide block (11) below the guide rod (10); the two first magnets (14) repel each other, and the two second magnets (15) repel each other.

6. The power battery protection device according to any one of claims 1 to 3, wherein the second damping mechanism comprises a third spring (22) and two second sliding blocks (23), a transverse sliding groove (21) matched with the second sliding blocks (23) is formed in the bottom in the shell (1), and the two second sliding blocks (23) are slidably arranged in the sliding groove (21); the left side and the right side of the lower end surface of the bottom fixed plate (3) are respectively hinged with a second connecting rod (24), and the two second connecting rods (24) are respectively hinged with the tops of the two second sliding blocks (23); the third spring (22) is arranged between the two second sliding blocks (23), and two ends of the third spring (22) are fixedly connected with the two second sliding blocks (23) respectively.

7. The power battery protection device according to claim 6, wherein the second damping mechanism further comprises two third magnets (25) and two fourth magnets (26), the two third magnets (25) are respectively and fixedly arranged on the left end surface of the left second sliding block (23) and the left end of the sliding chute (21), and the two fourth magnets (26) are respectively and fixedly arranged on the right end surface of the right second sliding block (23) and the right end of the sliding chute (21); the two third magnets (25) repel each other, and the two fourth magnets (26) repel each other.

8. The power battery protection device according to claim 6, wherein a group of longitudinal third damping mechanisms are respectively arranged between the lower end surface of the bottom fixing plate (3) and the inner bottom surface of the shell (1) at the left side and the right side of the second damping mechanism, the third damping mechanisms in the same group are uniformly spaced, the third damping mechanisms have the same structure as the first damping mechanisms, a sleeve of each third damping mechanism is connected with the inner bottom surface of the shell (1) in a welding manner, and a piston rod of each third damping mechanism is connected with the lower end surface of the bottom fixing plate (3) in a welding manner.

9. The power battery protection device according to claim 1, wherein the top and the bottom of the casing (1) are respectively provided with a plurality of heat dissipation holes (28) uniformly along the circumferential direction.

10. The power battery protection device according to claim 1, characterized in that the upper cover plate (2) is hinged to the housing (1).