A built-in pressure-resistant protection mechanism for a battery module

Abstract

The present invention belongs to the field of batteries, and in particular to a built-in pressure-resistant protection mechanism for a battery module. In view of the problems that the existing fixing device is difficult to disassemble, which is not conducive to the replacement and maintenance of the battery; and some monitoring methods rely on complex sensors and circuits, which are costly and difficult to maintain, the following scheme is proposed, which includes a protective shell and two battery bodies, the top of the protective shell is provided with an opening, the bottom of the protective shell is provided with a heat dissipation cavity, and the bottom inner wall of the protective shell is provided with a plurality of strip holes. In the present invention, through the cooperation of the L-shaped fixing block and the cover plate, and the tension of the No. 3 tension spring, the battery body can be firmly fixed in the device to avoid falling off, and the linkage mechanism of the push rod, the limit block, the trapezoidal groove, the push plate, the connecting rod, the cross support plate, the No. 1 spring and the elastic switch can monitor the expansion of the battery body in real time, and the design of the heat dissipation holes and the strip holes ensures the normal heat dissipation of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a built-in pressure-resistant protection mechanism for a battery module. Background Art

[0002] With the widespread use of electronic devices, batteries are important components for providing electrical energy, and their safety and stability are crucial to the normal operation of the devices. However, in the prior art, there are often some problems with the way batteries are fixed, such as loose fixation, easy to fall off, or when affected by external factors such as vibration, the battery is easily damaged, thus affecting its service life.

[0003] In addition, during long-term use, the battery may swell due to internal chemical reactions and temperature rise. If the battery swelling is not discovered and handled in time, it may cause safety accidents such as battery short circuit and explosion, causing damage to equipment and personnel.

[0004] In view of the above problems, although there are some battery fixing devices and monitoring methods in the prior art, they often have disadvantages such as complex structure, inconvenient operation, and poor monitoring effect. For example, some fixing devices are fixed with fasteners such as bolts, which are firm but difficult to disassemble, which is not conducive to battery replacement and maintenance; while some monitoring methods rely on complex sensors and circuits, which are costly and difficult to maintain.

[0005] Therefore, there is an urgent need for a battery fixing device and a monitoring method with a simple structure, convenient operation and good monitoring effect to solve the problems existing in the prior art. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art that the fixing device uses fasteners such as bolts for fixing, which is firm but difficult to disassemble, which is not conducive to the replacement and maintenance of the battery; and some monitoring methods rely on complex sensors and circuits, which are costly and difficult to maintain. A built-in pressure-resistant protection mechanism for a battery module is proposed.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A built-in pressure-resistant protection mechanism for a battery module, comprising a protective shell and two battery bodies, wherein the top of the protective shell is provided with an opening, the bottom of the protective shell is provided with a heat dissipation cavity, the bottom inner wall of the protective shell is provided with a plurality of strip holes, the strip holes are connected with the heat dissipation cavity, and the two battery bodies are symmetrically arranged and placed inside the protective shell;

[0009] The bottom inner wall of the protective shell is fixedly connected with eight L-shaped fixing blocks, the eight L-shaped fixing blocks are divided into two groups and are symmetrically arranged inside the protective shell, the four L-shaped fixing blocks on the same side are symmetrical in pairs, the battery body is located between the four L-shaped fixing blocks, the same placement plate is slidably connected between the four L-shaped fixing blocks, the same No. 2 spring is fixedly connected between the bottom of the placement plate and the bottom inner wall of the protective shell, and the placement plate is used to support the battery body;

[0010] A fixing plate is fixedly connected between the four L-shaped fixing blocks located on the same side, and a monitoring component for monitoring the state of the battery body is provided on one side of the fixing plate;

[0011] An alarm component for alarming is arranged inside the heat dissipation cavity;

[0012] The top of the protective shell is slidably connected to two symmetrically arranged cover plates, and two groups of fixing components for fixing the positions of the cover plates are arranged between the two cover plates.

[0013] In a possible design, the monitoring component includes two symmetrically arranged vertical grooves on one side of a fixed plate, the vertical grooves are slidably connected to vertical blocks, one end of the two vertical blocks is fixedly connected to the same push plate, a plurality of push rods are slidably passed through the interior of the fixed plate, one end of the push rods is in conflict with the battery body, the end of the push rods away from the battery body is fixedly connected to a limiting block, one side of the limiting block and one side of the fixed plate are fixedly connected with the same No. 1 tension spring, a plurality of trapezoidal grooves are provided on one side of the push plate, the limiting block is in conflict with the trapezoidal grooves, and is used to push the push plate downward.

[0014] In a possible design, the alarm assembly includes a fixed horizontal plate fixedly connected between the inner walls on both sides of the heat dissipation cavity, two elastic switches are arranged on the top of the fixed horizontal plate, and a connecting rod is fixedly connected to the bottom of the push plate. The bottoms of the four connecting rods on the same side all penetrate the protective shell and are fixedly connected to the same cross support plate, and two symmetrically arranged No. 1 springs are fixedly connected between the bottom of the cross support plate and the top of the fixed horizontal plate. The cross support plate is located directly above the elastic switch and is used to trigger the elastic switch, and the elastic switch is electrically connected to the external alarm through a wire.

[0015] In a possible design, the fixing assembly includes the same second handle arranged between two cover plates, the bottom of the second handle is fixedly connected to a round rod, the top of the protective shell is provided with two symmetrically arranged round grooves, the round rod is slidably connected inside the round groove, the same No. 2 tension spring is fixedly connected between the bottom of the round rod and the bottom inner wall of the round groove, slots are provided on both sides of the cover plates, and plug plates are fixedly connected on both sides of the second handle, and the plug plates are engaged with the slots.

[0016] In a possible design, a slider is fixedly connected to the bottom of the cover plate, four symmetrical sliding grooves are provided on the top of the protective shell, the slider is slidably connected inside the sliding groove, and a No. 3 tension spring is fixedly connected between one side of the slider and the inner wall of one side of the sliding groove.

[0017] In a possible design, a rectangular hole is provided inside the second handle, and a clearance groove is provided on one side of the cover plate, and the clearance groove is used to accommodate the battery body.

[0018] In a possible design, a plurality of heat dissipation holes are provided inside the L-shaped fixing block and the placement plate.

[0019] In a possible design, a first handle is fixedly connected to the top of the battery body, and a plurality of rubber pads are provided on the inner wall of the L-shaped fixing block.

[0020] In the present application, when in use, the battery body is placed between a plurality of L-shaped fixing blocks, and the two cover plates can be moved laterally at this time, and the two cover plates drive the sliders to approach each other and stretch the No. 3 tension spring. When the cover plates are close, the battery body is located inside the corresponding give way groove to prevent the battery body from being separated, and at the same time, the second handle is released, so that the round rod and the second handle are retracted under the tension of the No. 2 tension spring, and then the plug plate is inserted into the slot to ensure that the cover plate will not be loosened;

[0021] During normal use of the battery body, due to the gap between the two cover plates, normal wiring can be achieved to ensure use. At the same time, when subjected to vibration, the battery body will drive the placement plate to move downward, and the placement plate will squeeze the second spring. At the same time, the battery body and multiple rubber pads will continuously rub to achieve buffering and ensure the service life of the battery body. The setting of multiple heat dissipation holes and strip holes can ensure the normal heat dissipation process of the battery body.

[0022] When a certain surface of the battery body expands during use, it will push the corresponding push rod to move horizontally, and the push rod drives the limit block to enter the trapezoidal groove, and the trapezoidal groove drives the push plate to move downward, and the push plate drives the connecting rod to move downward, and the connecting rod drives the cross support plate to move downward, and the cross support plate squeezes the No. 1 spring and touches the corresponding elastic switch. At this time, the alarm connected to the elastic switch starts to alarm, which is used to realize the warning function. The setting of multiple push rods can greatly improve the monitoring direction and ensure the monitoring effect. At the same time, the setting of multiple push rods leaves a gap between the push plate and the battery body to ensure the heat dissipation process of the battery body, and the push plate is fixedly set, which can provide a protective effect for the battery body and further extend the service life of the battery body.

[0023] When the battery body needs to be removed, the two second handles can be pulled vertically upwards first. At this time, the two second handles drive the round rod to move upward and stretch the slot. At the same time, the plug-in plate is no longer stuck in the inside of the slot, and the braking state of the cover is released. The two cover plates can be quickly separated under the tension of the No. 3 tension spring, and then the battery body can be taken out normally, which is convenient for replacement and maintenance.

[0024] Beneficial effects:

[0025] 1. Stable battery fixation and convenient operation:

[0026] Through the cooperation of the L-shaped fixing block and the cover plate, as well as the tension of the No. 3 tension spring, the battery body can be firmly fixed in the device to prevent it from falling off.

[0027] The cover is designed with a plug and a slot so that it can be automatically locked after the second handle is released, ensuring that the cover will not loosen. At the same time, it is easy to quickly unlock and separate the cover by pulling the second handle, making it easier to remove and replace the battery.

[0028] 2. Efficient buffering and heat dissipation performance:

[0029] The setting of the rubber pad and the No. 2 spring provides effective buffering for the battery body, reduces the impact of vibration on the battery, and extends the service life of the battery.

[0030] The design of heat dissipation holes and strip holes ensures normal heat dissipation of the battery and avoids performance degradation or damage due to overheating.

[0031] 3. Comprehensive battery status monitoring and warning:

[0032] Through the linkage mechanism of the push rod, the limit block, the trapezoidal groove, the push plate, the connecting rod, the cross support plate, the No. 1 spring and the elastic switch, the expansion of the battery body can be monitored in real time.

[0033] Once a certain surface of the battery swells, the push plate moves down and triggers the elastic switch, and the connected alarm immediately sounds, realizing comprehensive monitoring of the battery status and timely warning.

[0034] 4. Flexible space layout and protection effect:

[0035] A gap is left between the push rod and the push plate to ensure that the heat dissipation process of the battery is not affected.

[0036] The push plate is fixed and can provide additional protection for the battery body, further extending the service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the three-dimensional structure of a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention;

[0038] Figure 2 A schematic diagram of the three-dimensional structure of a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention from a second viewing angle;

[0039] Figure 3 A three-dimensional schematic diagram of the internal structure of a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention;

[0040] Figure 4 A schematic diagram of the three-dimensional structure of a cross support plate and a fixed horizontal plate in a built-in anti-compression protection mechanism for a battery module proposed by the present invention;

[0041] Figure 5 A schematic diagram of the three-dimensional structure of a push plate and a cross support plate in a built-in anti-compression protection mechanism for a battery module proposed by the present invention;

[0042] Figure 6 An exploded view of a push plate and a fixed plate in a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention;

[0043] Figure 7 A schematic diagram of the three-dimensional structure of multiple L-shaped fixing blocks in a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention;

[0044] Figure 8 A schematic diagram of the three-dimensional structure of a protective shell in a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention;

[0045] Fig. 9 This is a schematic diagram of the explosion structure of a built-in pressure-resistant protection mechanism for a battery module proposed by the present invention.

[0046] In the figure: 1. protective shell; 2. cover plate; 3. first handle; 4. second handle; 5. heat dissipation cavity; 6. fixed horizontal plate; 7. cross support plate; 8. L-shaped fixing block; 9. push plate; 10. round groove; 11. slide groove; 12. battery body; 13. heat dissipation hole; 14. connecting rod; 15. elastic switch; 16. No. 1 spring; 17. fixed plate; 18. push rod; 19. vertical groove; 20. trapezoidal groove; 21. vertical block; 22. limit block; 23. No. 1 tension spring; 24. rubber pad; 25. No. 2 spring; 26. placement plate; 29. ​​strip hole; 30. No. 2 tension spring; 31. slot; 32. slider; 33. No. 3 tension spring; 34. round rod; 35. rectangular hole; 36. plug plate; 37. clearance groove. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0048] Example 1

[0049] Reference Figure 1-9 A built-in pressure-resistant protection mechanism for a battery module, which is used in the field of batteries, comprises: a protective shell 1 and two battery bodies 12, the top of the protective shell 1 is provided with an opening, the bottom of the protective shell 1 is provided with a heat dissipation cavity 5, the bottom inner wall of the protective shell 1 is provided with a plurality of strip holes 29, the strip holes 29 are connected with the heat dissipation cavity 5, and the two battery bodies 12 are symmetrically arranged and placed inside the protective shell 1;

[0050] The bottom inner wall of the protective shell 1 is fixedly connected with eight L-shaped fixing blocks 8, and the eight L-shaped fixing blocks 8 are divided into two groups and symmetrically arranged inside the protective shell 1. The four L-shaped fixing blocks 8 on the same side are symmetrical in pairs, and the battery body 12 is located between the four L-shaped fixing blocks 8. The same placement plate 26 is slidably connected between the four L-shaped fixing blocks 8, and the same No. 2 spring 25 is fixedly connected between the bottom of the placement plate 26 and the bottom inner wall of the protective shell 1. The placement plate 26 is used to support the battery body 12, and the battery body 12 is placed between the multiple L-shaped fixing blocks 8. At this time, the two cover plates 2 can be moved horizontally, and the two cover plates 2 drive the sliders 32 to approach each other and stretch the No. 3 tension spring 33. When the cover plates 2 are close, the battery body 12 is located inside the corresponding give way groove 37 to prevent the battery body 12 from detaching. At the same time, the second handle 4 is released, so that the round rod 34 and the second handle 4 are retracted under the tension of the No. 2 tension spring 30, so that the plug plate 36 is inserted into the inside of the slot 31 to ensure that the cover plate 2 will not loosen;

[0051] A fixing plate 17 is fixedly connected between the four L-shaped fixing blocks 8 located on the same side. A monitoring component for monitoring the state of the battery body 12 is provided on one side of the fixing plate 17. The monitoring component includes two symmetrically arranged vertical slots 19 opened on one side of the fixing plate 17. A vertical block 21 is slidably connected inside the vertical slot 19. One end of the two vertical blocks 21 is fixedly connected to the same push plate 9. A plurality of push rods 18 are slidably penetrated inside the fixing plate 17. One end of the push rod 18 conflicts with the battery body 12. One end of the push rod 18 away from the battery body 12 is fixedly connected to a limiting block 22. One side of the limiting block 22 is fixedly connected to one side of the fixing plate 17 with a No. 1 tension spring 23. A plurality of trapezoidal slots 20 are opened on one side of the push plate 9. The limiting block 22 conflicts with the trapezoidal slot 20 to push the push plate 9 downward.

[0052] An alarm component for alarming is arranged inside the heat dissipation cavity 5, and the alarm component comprises a same fixed horizontal plate 6 fixedly connected between the inner walls on both sides of the heat dissipation cavity 5, two elastic switches 15 are arranged on the top of the fixed horizontal plate 6, and a connecting rod 14 is fixedly connected to the bottom of the push plate 9, and the bottoms of the four connecting rods 14 on the same side all penetrate the protective shell 1 and are fixedly connected to the same cross support plate 7, and two symmetrically arranged No. 1 springs 16 are fixedly connected between the bottom of the cross support plate 7 and the top of the fixed horizontal plate 6, and the cross support plate 7 is located directly above the elastic switch 15 and is used to trigger the elastic switch 15, and the elastic switch 15 is electrically connected to the external alarm through a wire. When a certain surface of the battery body 12 expands during use, it will push the corresponding push plate 9. The movable rod 18 moves laterally, and the push rod 18 drives the limit block 22 to enter the interior of the trapezoidal groove 20. The trapezoidal groove 20 drives the push plate 9 to move downward, and the push plate 9 drives the connecting rod 14 to move downward. The connecting rod 14 drives the cross support plate 7 to move downward, and the cross support plate 7 squeezes the No. 1 spring 16 and touches the corresponding elastic switch 15. At this time, the alarm connected to the elastic switch 15 starts to alarm to realize the warning function. The setting of multiple push rods 18 can greatly improve the monitoring direction and ensure the monitoring effect. At the same time, the setting of multiple push rods 18 leaves a gap between the push plate 9 and the battery body 12 to ensure the heat dissipation process of the battery body 12. The push plate 9 is fixedly set, which can provide a protective effect for the battery body 12 and extend the service life of the battery body 12 again.

[0053] The top of the protective shell 1 is slidably connected with two symmetrically arranged cover plates 2, and two groups of fixing components for fixing the position of the cover plates 2 are arranged between the two cover plates 2. The fixing components include the same second handle 4 arranged between the two cover plates 2, and the bottom of the second handle 4 is fixedly connected with a round rod 34. The top of the protective shell 1 is provided with two symmetrically arranged circular grooves 10, and the round rod 34 is slidably connected inside the circular groove 10. The bottom of the round rod 34 and the bottom inner wall of the circular groove 10 are fixedly connected with the same No. 2 tension spring 30. Slots 31 are provided on both sides of the cover plates 2, and plug plates 36 are fixedly connected on both sides of the second handle 4. The plug plates 36 are engaged with the slots 31. The bottom of the cover plate 2 is fixedly connected with a slider 32. The top of the protective shell 1 is provided with four symmetrical slide grooves 11, and the slider 32 is slidably connected inside the slide groove 11. The same three-way spring 30 is fixedly connected between one side of the slider 32 and the inner wall of one side of the slide groove 11. No. tension spring 33. During the normal use of the battery body 12, since there is a gap between the two cover plates 2, the wiring can be normally performed to ensure use. At the same time, when subjected to vibration, the battery body 12 will drive the placement plate 26 to move downward, and the placement plate 26 squeezes the No. 2 spring 25. At the same time, the battery body 12 and the multiple rubber pads 24 are constantly rubbed to achieve buffering and ensure the service life of the battery body 12. The provision of multiple heat dissipation holes 13 and strip holes 29 can ensure the normal heat dissipation process of the battery body 12. When the battery body 12 needs to be removed, the two second handles 4 can be pulled vertically upward first. At this time, the two second handles 4 drive the round rod 34 to move upward and stretch the slot 31. At the same time, the plug plate 36 is no longer stuck in the inside of the slot 31, and the braking state of the cover plate 2 is released. The two cover plates 2 can be quickly separated under the tension of the No. 3 tension spring 33, and then the battery body 12 can be normally taken out, which is convenient for replacement and maintenance.

[0054] Example 2

[0055] refer to Figure 1-9 , improved on the basis of Example 1: a rectangular hole 35 is opened inside the second handle 4, a clearance groove 37 is opened on one side of the cover plate 2, the clearance groove 37 is used to accommodate the battery body 12, a plurality of heat dissipation holes 13 are opened inside the L-shaped fixing block 8 and the placement plate 26, the top of the battery body 12 is fixedly connected to the first handle 3, and a plurality of rubber pads 24 are provided on the inner wall of the L-shaped fixing block 8.

[0056] However, as is well known to those skilled in the art, the working principle and wiring method of the battery body 12 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any selections according to their needs or convenience.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A built-in pressure-resistant protection mechanism for a battery module, characterized in that: include: A protective shell (1) and two battery bodies (12), wherein the top of the protective shell (1) is provided with an opening, the bottom of the protective shell (1) is provided with a heat dissipation cavity (5), the bottom inner wall of the protective shell (1) is provided with a plurality of strip holes (29), the strip holes (29) are connected to the heat dissipation cavity (5), and the two battery bodies (12) are symmetrically arranged and placed inside the protective shell (1); The bottom inner wall of the protective shell (1) is fixedly connected with eight L-shaped fixing blocks (8), the eight L-shaped fixing blocks (8) are divided into two groups and are symmetrically arranged inside the protective shell (1), the four L-shaped fixing blocks (8) located on the same side are symmetrical in pairs, the battery body (12) is located between the four L-shaped fixing blocks (8), the same placement plate (26) is slidably connected between the four L-shaped fixing blocks (8), the same No. 2 spring (25) is fixedly connected between the bottom of the placement plate (26) and the bottom inner wall of the protective shell (1), and the placement plate (26) is used to support the battery body (12); A fixing plate (17) is fixedly connected between the four L-shaped fixing blocks (8) located on the same side, and a monitoring component for monitoring the state of the battery body (12) is provided on one side of the fixing plate (17); An alarm component for alarming is arranged inside the heat dissipation cavity (5); The top of the protective housing (1) is slidably connected to two symmetrically arranged cover plates (2), and two groups of fixing components for fixing the positions of the cover plates (2) are arranged between the two cover plates (2).

2. The built-in pressure-resistant protection mechanism for a battery module according to claim 1, characterized in that: The monitoring component comprises two symmetrically arranged vertical grooves (19) opened on one side of the fixed plate (17), the vertical grooves (19) are slidably connected with vertical blocks (21), one end of the two vertical blocks (21) is fixedly connected with the same push plate (9), the fixed plate (17) is slidably penetrated by a plurality of push rods (18), one end of the push rods (18) is in contact with the battery body (12), the end of the push rods (18) away from the battery body (12) is fixedly connected with a limiting block (22), one side of the limiting block (22) and one side of the fixed plate (17) are fixedly connected with the same No. 1 tension spring (23), one side of the push plate (9) is provided with a plurality of trapezoidal grooves (20), the limiting block (22) is in contact with the trapezoidal grooves (20), and is used to push the push plate (9) downward.

3. The built-in pressure-resistant protection mechanism for a battery module according to claim 2, characterized in that: The alarm component comprises a fixed horizontal plate (6) fixedly connected between the inner walls on both sides of the heat dissipation cavity (5), two elastic switches (15) are arranged on the top of the fixed horizontal plate (6), a connecting rod (14) is fixedly connected to the bottom of the push plate (9), the bottoms of the four connecting rods (14) located on the same side all penetrate the protective housing (1) and are fixedly connected to the same cross support plate (7), two symmetrically arranged No. 1 springs (16) are fixedly connected between the bottom of the cross support plate (7) and the top of the fixed horizontal plate (6), the cross support plate (7) is located directly above the elastic switch (15) and is used to trigger the elastic switch (15), and the elastic switch (15) is electrically connected to an external alarm through a wire.

4. The built-in pressure-resistant protection mechanism for a battery module according to claim 1, characterized in that: The fixing assembly comprises a second handle (4) arranged between two cover plates (2), the bottom of the second handle (4) is fixedly connected to a round rod (34), the top of the protective shell (1) is provided with two symmetrically arranged round grooves (10), the round rod (34) is slidably connected inside the round groove (10), the bottom of the round rod (34) and the bottom inner wall of the round groove (10) are fixedly connected to a second tension spring (30), both sides of the cover plate (2) are provided with slots (31), both sides of the second handle (4) are fixedly connected to plug plates (36), and the plug plates (36) are engaged with the slots (31).

5. The built-in pressure-resistant protection mechanism for a battery module according to claim 4, characterized in that: A slider (32) is fixedly connected to the bottom of the cover plate (2), and four symmetrical slide grooves (11) are provided on the top of the protective shell (1). The slider (32) is slidably connected inside the slide groove (11), and a No. 3 tension spring (33) is fixedly connected between one side of the slider (32) and the inner wall of one side of the slide groove (11).

6. The built-in pressure-resistant protection mechanism for a battery module according to claim 4, characterized in that: A rectangular hole (35) is provided inside the second handle (4), and a clearance groove (37) is provided on one side of the cover plate (2), wherein the clearance groove (37) is used to accommodate the battery body (12).

7. The built-in pressure-resistant protection mechanism for a battery module according to claim 1, characterized in that: The L-shaped fixing block (8) and the placement plate (26) are both provided with a plurality of heat dissipation holes (13) inside.

8. The built-in pressure-resistant protection mechanism for a battery module according to claim 1, characterized in that: A first handle (3) is fixedly connected to the top of the battery body (12), and a plurality of rubber pads (24) are provided on the inner wall of the L-shaped fixing block (8).

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