Dual leakage protection structure of battery pack

Abstract

The invention belongs to the technical field of power electronics, and discloses a battery pack dual leakage protection structure which comprises a placement table, a battery pack is arranged at the top of the placement table, a first motor is arranged in the placement table, a first gear is rotationally connected to the outer ring of the output shaft end of the first motor, and the first gear is meshed with a second gear. Through cooperation of a fuse shell, a switch, a top spring, a bottom spring and other structures, the effect of protecting a battery pack through a double leakage protection structure is facilitated, when the current of the battery pack is too large, a fuse can fuse a line, the protection effect is achieved, and the service life of the battery pack is prolonged. And secondly, a connecting ring on one side of the switch is provided with a top spring and a bottom spring, so that when the current is too large, the switch of the shell of the leakage protector can also play a role in automatically switching off, and the effect of double leakage protection on the battery pack is achieved.

Description

Technical Field

[0001] The present application belongs to the field of power electronics technology, and specifically relates to a double leakage protection structure for a battery pack. Background Art

[0002] With the continuous development of modern science and technology, battery packs are used in various fields more and more widely. However, battery packs also face some safety hazards during use, among which leakage is particularly prominent.

[0003] The existing battery pack leakage protection structure still has drawbacks when in use. Traditional battery packs usually only adopt a single leakage protection measure, but a single protection method may have certain limitations when facing complex usage environments and high safety standards. It may easily lead to the inability to effectively protect the battery pack from leakage, which may lead to serious safety accidents. Therefore, it needs to be improved. Summary of the invention

[0004] In order to solve the problem of using a single leakage protection measure in the above background technology, the present application provides a double leakage protection structure for a battery pack.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a double leakage protection structure for a battery pack, comprising a placement table, a battery pack is arranged on the top of the placement table, a first motor is arranged inside the placement table, an outer ring of an output shaft end of the first motor is rotatably connected to a first gear, the first gear is meshed with a second gear, the second gear is meshed with a third gear, an output shaft end of the first motor is rotatably connected to a first movable plate, one side of the first movable plate is rotatably connected to a connecting rod, the top of the connecting rod away from the first movable plate is movably connected to an adjustment plate, a leakage protection shell is arranged on one side of the battery pack, a fuse shell is arranged on one side of the leakage protection shell, a rotating rod is arranged inside the leakage protection shell, the rotating rod is rotatably connected to a switch, a connecting ring is arranged on a side of the switch close to the rotating rod, a connecting block is rotatably connected to a connecting block on a side of the connecting ring away from the switch, a top spring is fixedly connected to one side of the connecting ring, and a bottom spring is fixedly connected to the bottom of the connecting block.

[0006] Preferably, the number of the second gear and the third gear is set to two, and the number of the connecting rod is set to two.

[0007] Preferably, a second motor is provided on one side of the placement table, and an output shaft end of the second motor is rotatably connected to a screw rod.

[0008] By setting the second motor, when the second motor is running, it can drive the screw rod to rotate. While the screw rod is rotating, the adjustment plate can be threadedly rotated on the surface of the screw rod, so that the adjustment plate can move better.

[0009] Preferably, the screw rod is threadedly connected to the adjustment plate, and a sliding plate is fixedly connected to a side of the adjustment plate away from the battery pack.

[0010] Preferably, a side of the sliding plate away from the adjusting plate is slidably connected to a fixing plate, and a spring is arranged inside the fixing plate.

[0011] When the adjusting plate moves, the sliding plate slides in the fixed plate to ensure the stability of the movement of the adjusting plate. At the same time, the fixed plate is fixed on the top of the placement table to ensure the firmness of the entire structure. The spring in the fixed plate plays a buffering role during the movement and resetting of the sliding plate to prevent the movement from being too stiff and protect the structure from damage.

[0012] Preferably, a baffle is provided inside the battery pack, and a circuit is provided on the top of the battery pack.

[0013] The batteries are separated by barrier plates inside the battery pack. Once a battery leaks, the barrier plates can limit the scope of the leakage and prevent the leakage of one battery from affecting the entire battery pack.

[0014] Preferably, the other side of the line is connected to the leakage protection housing, and the inside of the leakage protection housing is connected to the fuse housing through the line.

[0015] Preferably, a slide groove is provided on one side of the placement platform, and a slider is slidably connected to a side of the adjustment plate close to the slide groove.

[0016] Preferably, the material of the baffle plate is insulating plastic, and the number of the baffle plates is set to be multiple.

[0017] The material of the barrier plate is insulating plastic, which has good insulating properties and can effectively block the passage of current, thereby preventing leakage from being conducted inside the battery pack.

[0018] Preferably, a vent is provided at the bottom of the fuse housing, and a leakage protector is arranged inside the leakage protection housing.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present application facilitates the fixed connection of battery packs of different sizes through the coordination of structures such as the first motor, the first gear, the first movable plate, and the adjustment plate setting. By turning on the setting of the first motor, the first gear and the first movable plate rotate synchronously when the first motor rotates, and the second gear and the third gear that are meshed with the connecting rod expand to both sides or contract inward synchronously when the first gear and the first movable plate rotate, so that the adjustment plate can support and fix battery packs of different sizes, avoiding the need to redesign and install protective devices due to battery pack upgrades or replacements, thereby achieving the effect of facilitating the fixation and use of different battery packs.

[0020] The present application cooperates with structures such as the fuse housing, switch, top spring, and bottom spring settings, thereby facilitating the protection of the battery pack through a double leakage protection structure. When the current in the battery pack is too large, the fuse will blow the circuit to play a protective role. Secondly, the connecting ring on one side of the switch is set with a top spring and a bottom spring, so that when the current is too large, the switch of the leakage protector housing can also be automatically disconnected, thereby achieving a double leakage protection effect for the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the cross-sectional structure of this application; Figure 3 This is a schematic diagram of the first motor structure of this application; Figure 4 This is an exploded view of the first motor of this application; Figure 5 This is a schematic diagram of the structure of the leakage protection housing for this application; Figure 6 This is a schematic diagram of the side section structure of the leakage protection housing of this application; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the connection ring structure of this application.

[0022] In the figure: 1. placement table; 2. battery pack; 3. first motor; 4. first gear; 5. second gear; 6. third gear; 7. first movable plate; 8. connecting rod; 9. adjustment plate; 10. second motor; 11. screw rod; 12. fixed plate; 13. sliding plate; 14. spring; 15. leakage protection housing; 16. fuse housing; 17. switch; 18. rotating rod; 19. connecting ring; 20. bottom spring; 21. top spring; 22. connecting block; 23. blocking plate; 24. circuit. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] like Figures 1 to 8 As shown, the present application provides a double leakage protection structure for a battery pack, comprising a placement table 1, a battery pack 2 is arranged on the top of the placement table 1, a first motor 3 is arranged inside the placement table 1, the outer ring of the output shaft end of the first motor 3 is rotatably connected to the first gear 4, the first gear 4 is meshed with the second gear 5, the second gear 5 is meshed with the third gear 6, the output shaft end of the first motor 3 is rotatably connected to the first movable plate 7, one side of the first movable plate 7 is rotatably connected to the connecting rod 8, the top of the connecting rod 8 away from the first movable plate 7 is movably connected to the adjusting plate 9, a leakage protection shell 15 is arranged on one side of the battery pack 2, a fuse shell 16 is arranged on one side of the leakage protection shell 15, a rotating rod 18 is arranged inside the leakage protection shell 15, the rotating rod 18 is rotatably connected to the switch 17, a connecting ring 19 is arranged on the side of the switch 17 close to the rotating rod 18, the connecting ring 19 is rotatably connected to the connecting block 22 on the side away from the switch 17, one side of the connecting ring 19 is fixedly connected to the top spring 21, and the bottom of the connecting block 22 is fixedly connected to the bottom spring 20.

[0025] By turning on the setting of the first motor 3, when the first motor 3 is running, the first gear 4 and the first movable plate 7 rotate synchronously. As the first gear 4 and the first movable plate 7 rotate, the second gear 5 and the third gear 6 and the connecting rod 8 meshing therewith also expand to both sides or contract inward synchronously. Such a design enables the adjustment plate 9 to be flexibly adjusted according to battery packs 2 of different sizes, so as to support and fix battery packs 2 of various specifications. This feature avoids the trouble of redesigning and installing the protection device due to the upgrade or replacement of the battery pack 2, and greatly improves the versatility and adaptability of the protection structure. When the battery pack 2 is working normally, the current flows within the preset safety range. At this time, the leakage protector inside the leakage protection housing 15 continues to play a monitoring role. It detects the inflow and outflow The current difference of the battery pack 2 is used to determine whether leakage has occurred. Once the current difference exceeds the set threshold, it will be determined that leakage may have occurred. At the same time, the fuse housing 16 is connected to the battery pack 2 through a line, and the fuse also monitors the current in the line. When the leakage protector detects leakage, it will quickly trigger the protection mechanism, disconnect the internal switch 17, cut off the connection between the battery pack 2 and the external load, and prevent the leakage current from continuing to flow. This double leakage protection structure achieves comprehensive protection for the battery pack 2 through the synergy of multiple components. The adjustability of the adjustment plate 9 ensures the fixed requirements of battery packs 2 of different specifications, and the dual protection of the leakage protector and the fuse can respond quickly when leakage occurs, cut off the circuit, and prevent the leakage current from causing greater harm to equipment and personnel.

[0026] like Figure 2 , Figure 3 As shown, the number of the second gear 5 and the third gear 6 is set to two, the number of the connecting rod 8 is set to two, and a second motor 10 is arranged on one side of the placement table 1. The output shaft end of the second motor 10 is rotatably connected to a screw rod 11, and the screw rod 11 is threadedly connected to the adjustment plate 9. The side of the adjustment plate 9 away from the battery pack 2 is fixedly connected to a sliding plate 13.

[0027] The above scheme is adopted: by setting the number of the second gear 5 and the third gear 6 to two, and the number of the connecting rod 8 to two, such a design is to drive the second gear 5 and the third gear 6 on both sides when the first gear 4 and the first movable plate 7 rotate, so that the connecting rod 8 on both sides can drive the adjustment plates 9 on both sides to move, and a second motor 10 is arranged on one side of the placement table 1. Through the setting of the second motor 10, when the second motor 10 is running, it can drive the screw rod 11 to rotate. While the screw rod 11 rotates, the adjustment plate 9 can be threadedly rotated on the surface of the screw rod 11. In this way, the adjustment plate 9 can be better moved. The side of the adjustment plate 9 away from the battery pack 2 is fixedly connected with a sliding plate 13. Through the setting of the sliding plate 13, when the adjustment plate 9 is adjusting the spacing, the sliding plate 13 can be synchronously slid through a slider on one side to ensure the stability and smoothness of the movement process of the adjustment plate 9. The overall structure realizes precise control and stable movement of the adjustment plate 9 through the coordinated action of multiple components to meet the adjustment requirements of the battery pack 2 under different circumstances.

[0028] like Figure 3 , Figure 4 As shown, the sliding plate 13 is slidably connected to the fixed plate 12 on one side away from the adjusting plate 9, a spring 14 is arranged inside the fixed plate 12, a blocking plate 23 is arranged inside the battery pack 2, a line 24 is arranged on the top of the battery pack 2, the other side of the line 24 is connected to the leakage protection housing 15, and the inside of the leakage protection housing 15 is connected to the fuse housing 16 through the line 24.

[0029] The above scheme is adopted: the sliding plate 13 is slidably connected to the fixed plate 12 at one side away from the adjusting plate 9, and the fixed plate 12 is fixed to the top of the placing table 1. In this way, the sliding plate 13 can be extended or shortened inside the fixed plate 12. When the adjusting plate 9 is adjusted, the top of the placing table 1 will not be hollowed out, thereby avoiding affecting the normal operation of other internal equipment. A spring 14 is arranged inside the fixed plate 12. The arrangement of the spring 14 can play a good buffering effect, so that the sliding plate 13 will not be too rigid when resetting. A resistance is arranged inside the battery pack 2 The partition 23 can separate the battery pack 2 to prevent a battery from leaking and causing a larger leakage in the entire battery pack 2. A circuit 24 is set on the top of the battery pack 2. Through the setting of the circuit 24, the battery pack 2 can be connected to the leakage protection shell 15, and the inside of the leakage protection shell 15 is also connected to the fuse shell 16 through the circuit 24, so that the whole device is tightly connected. In this way, when leakage occurs, the whole device can play a double leakage protection effect, which greatly improves the safety and reliability of the battery pack 2.

[0030] like Figure 1 , Figure 6 As shown, a slide groove is provided on one side of the placement table 1, and a slider is slidably connected to the side of the adjustment plate 9 close to the slide groove. The material of the blocking plate 23 is insulating plastic, and the number of the blocking plates 23 is set to be multiple. A ventilation hole is provided at the bottom of the fuse housing 16, and a leakage protector is arranged inside the leakage protection housing 15.

[0031] The above scheme is adopted: a slide groove is opened on one side of the placement table 1, so that when the adjustment plate 9 is adjusted in spacing, it can slide smoothly on the placement table 1 with the help of a slider, the material of the blocking plate 23 is insulating plastic, and the insulating plastic has good insulating properties, which can effectively prevent the current from passing through, thereby preventing leakage from being conducted inside the battery pack 2. There are multiple blocking plates 23, and such a setting can fully block the batteries inside the battery pack 2. A vent is opened at the bottom of the fuse housing 16, and the existence of the vent can achieve ventilation to avoid excessive internal temperature. A leakage protector is arranged inside the leakage protection housing 15, and the leakage protector can enable the battery pack 2 to connect and operate between the lines 24. When the current of the battery pack 2 is too large, it can be conducted through the leakage protector. The circuit is melted by disconnecting the switch 17 or by the fuse housing 16 to ensure the safe operation of the battery pack 2. The overall design effectively improves the safety and reliability of the battery pack 2 through the synergistic effect of multiple measures, protects the battery pack 2 from different aspects, and prevents safety problems such as leakage and overheating. The leakage protector determines whether leakage occurs by detecting the difference in current flowing into and out of the battery pack 2. If the current difference exceeds the set threshold, it is determined that leakage may occur. The fuse also monitors the current in the circuit. The main function of the fuse is to melt when the current is too large to cut off the circuit, but it can also respond to leakage to a certain extent. When serious leakage occurs and the current increases abnormally, the fuse may melt due to overcurrent, thereby playing a role in auxiliary leakage protection.

[0032] Working principle and usage process of this application: First, by placing the battery pack 2 on the placement table 1, the first motor 3 inside the placement table 1 can drive the first gear 4 to rotate. When the first gear 4 rotates, it can drive the second gear 5 meshing on both sides. When the second gear 5 rotates, the meshing third gear 6 also rotates. The output shaft end of the first motor 3 is arranged to drive the first movable plate 7, so that the connecting rods 8 on both sides of the first movable plate 7 can drive the adjustment plate 9 to move. The movement of the adjustment plate 9 can fix the battery packs 2 of different sizes. The second motor 10 on one side of the placement table 1 can drive the screw rod 11 to rotate. When the screw rod 11 rotates, the adjustment plate 9 can be threaded on the surface of the screw rod 11. In this way, the adjustment plate 9 can be better moved, which is convenient for redesigning and installing the protection device due to the upgrade or replacement of the battery pack 2. After the battery pack 2 is installed and fixed, the leakage protector inside the leakage protection shell 15 continuously monitors the line current of the battery pack 2. When the battery pack 2 is working normally, the current flows within the preset safety range. The leakage protector detects the inflow and The difference in current flowing out of the battery pack 2 is used to determine whether leakage has occurred. If the current difference exceeds the set threshold, it is determined that leakage may have occurred. The fuse housing 16 is connected to the battery pack 2 through a line, and the fuse also monitors the current in the line. The main function of the fuse is to melt when the current is too large to cut off the circuit, but it can also respond to leakage to a certain extent. When serious leakage occurs and the current increases abnormally, the fuse may melt due to overcurrent, playing a role in auxiliary leakage protection. When the leakage protector detects leakage, it will quickly trigger the protection mechanism, disconnect the internal switch, cut off the connection between the battery pack 2 and the external load, and prevent the leakage current from continuing to flow. The barrier plate 23 inside the battery pack 2 separates the batteries. Once a battery leaks, the barrier plate 23 can limit the leakage range to prevent the leakage of one battery from affecting the entire battery pack 2. In short, this dual leakage protection structure of the battery pack 2 achieves comprehensive leakage protection for the battery pack 2 through the synergistic effect of multiple components, thereby improving the safety and reliability of the use of the battery pack 2.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A double leakage protection structure for a battery pack, comprising a placement table (1), characterized in that: A battery pack (2) is arranged on the top of the placement table (1), a first motor (3) is arranged inside the placement table (1), the outer ring of the output shaft end of the first motor (3) is rotatably connected to a first gear (4), the first gear (4) is meshed with a second gear (5), the second gear (5) is meshed with a third gear (6), the output shaft end of the first motor (3) is rotatably connected to a first movable plate (7), one side of the first movable plate (7) is rotatably connected to a connecting rod (8), the top of the connecting rod (8) away from the first movable plate (7) is movably connected to an adjustment plate (9), the battery pack (2 ) is provided on one side of the leakage protection housing (15), a fuse housing (16) is provided on one side of the leakage protection housing (15), a rotating rod (18) is provided inside the leakage protection housing (15), the rotating rod (18) is rotatably connected to a switch (17), a connecting ring (19) is provided on a side of the switch (17) close to the rotating rod (18), a connecting block (22) is rotatably connected to a side of the connecting ring (19) away from the switch (17), a top spring (21) is fixedly connected to one side of the connecting ring (19), and a bottom spring (20) is fixedly connected to the bottom of the connecting block (22).

2. The double leakage protection structure of a battery pack according to claim 1, characterized in that: The number of the second gear (5) and the third gear (6) is set to two, and the number of the connecting rods (8) is set to two.

3. The battery pack double leakage protection structure according to claim 1, characterized in that: A second motor (10) is provided on one side of the placement table (1), and an output shaft end of the second motor (10) is rotatably connected to a screw rod (11).

4. The battery pack double leakage protection structure according to claim 3, characterized in that: The screw rod (11) is threadedly connected to the adjustment plate (9), and a sliding plate (13) is fixedly connected to a side of the adjustment plate (9) away from the battery pack (2).

5. The battery pack double leakage protection structure according to claim 4, characterized in that: A side of the sliding plate (13) away from the adjusting plate (9) is slidably connected to a fixing plate (12), and a spring (14) is disposed inside the fixing plate (12).

6. The battery pack double leakage protection structure according to claim 1, characterized in that: A blocking plate (23) is arranged inside the battery pack (2), and a circuit (24) is arranged on the top of the battery pack (2).

7. The battery pack double leakage protection structure according to claim 6, characterized in that: The other side of the line (24) is connected to the leakage protection housing (15), and the interior of the leakage protection housing (15) is connected to the fuse housing (16) via the line (24).

8. The battery pack double leakage protection structure according to claim 1, characterized in that: A sliding groove is provided on one side of the placement platform (1), and a sliding block is slidably connected to a side of the adjustment plate (9) close to the sliding groove.

9. The battery pack double leakage protection structure according to claim 6, characterized in that: The material of the baffle plate (23) is insulating plastic, and the number of the baffle plates (23) is set to be multiple.

10. The battery pack double leakage protection structure according to claim 1, characterized in that: A vent is provided at the bottom of the fuse housing (16), and a leakage protector is arranged inside the leakage protection housing (15).

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