Protection plate of small soft package lithium battery

Abstract

The utility model provides a protection plate of a small-sized soft package lithium battery. The protection plate of the small soft package lithium battery comprises a device main body, the device main body is fixedly connected with a protection plate, the protection plate is fixedly connected with an overcharge protection bin, the overcharge protection bin is fixedly connected with a motor fixing frame, the motor fixing frame is fixedly connected with a protection motor, and the protection motor is fixedly connected with the protection plate. The output end of the protection motor is provided with a threaded rod, the threaded rod is in threaded connection with a nut block, the nut block is fixedly connected with an insulation protection rod, the overcharge protection bin is provided with a guide groove, the guide groove is in sliding connection with a guide block, the overcharge protection bin is provided with a protection bearing, and the protection bearing is provided with a protection groove. The overcharge protection bin is fixedly connected with a device bottom plate, the device bottom plate is fixedly connected with a connection fixing block, and the connection fixing block is provided with a protection rotating shaft. The protection plate of the small-sized soft package lithium battery has the effect of prolonging the service life of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a protective plate for a small soft-pack lithium battery. Background Art

[0002] With the widespread use of lithium batteries, more and more fields are demanding lithium batteries, such as Bluetooth headsets, Bluetooth speakers, electronic watches and other devices. The battery cavity design space on these devices is not only small, but also in close contact with other components, so smaller lithium batteries are needed to meet the space requirements. Today, lithium batteries need to be exported to all parts of the world and must meet the PSE certification of the exporting countries.

[0003] However, when charging traditional small soft-pack lithium batteries, users often forget to unplug the charger after charging, which will cause overcharging. Overcharging will accelerate the aging and damage of the battery. If the power is not disconnected, overcharging may cause safety problems such as battery heating, smoking, and even explosion, which greatly shortens the battery life.

[0004] Therefore, it is necessary to provide a protective plate for a small soft-pack lithium battery to solve the above technical problems. Utility Model Content

[0005] The utility model provides a protection board for a small soft-pack lithium battery, which solves the problem that the service life of the lithium battery is greatly shortened due to the lack of overcharge protection function in the traditional lithium battery protection board.

[0006] In order to solve the above technical problems, the utility model provides a protection plate for a small soft-pack lithium battery, comprising: a device body, a protection plate fixedly connected to the device body, an overcharge protection bin fixedly connected to the protection plate, a motor fixing frame fixedly connected to the overcharge protection bin, a protection motor fixedly connected to the motor fixing frame, a threaded rod arranged on the output end of the protection motor, a nut block threadedly connected to the threaded rod, an insulating protection rod fixedly connected to the nut block, a guide groove arranged on the overcharge protection bin, a guide block slidably connected to the guide groove, a protection bearing arranged on the overcharge protection bin, a device bottom plate fixedly connected to the overcharge protection bin, and the device A connecting and fixing block is fixedly connected to the bottom plate, a protective rotating shaft is arranged on the connecting and fixing block, a vertical connecting rod is arranged on the protective rotating shaft, a connecting protrusion is fixedly connected to the vertical connecting rod, an arc-shaped limiting block is fixedly connected to the connecting protrusion, an arc-shaped rod is fixedly connected to the bottom plate of the device, an arc-shaped groove is provided on the arc-shaped rod, a spring fixing rod is fixedly connected to the bottom plate of the device, an insulating block is fixedly connected to the spring fixing rod, a reset spring is fixedly connected to the insulating block, a connecting rotating shaft is fixedly connected to the vertical connecting rod, an insulating connecting rod is arranged on the connecting rotating shaft, a voltage detector is installed on the overcharging protection bin, and a controller is installed on the overcharging protection bin.

[0007] Preferably, a negative electrode is provided on the overcharge protection compartment, and a positive electrode is provided on the overcharge protection compartment.

[0008] Preferably, a partition plate is fixedly connected to the overcharging protection bin, and a heat dissipation grille is provided on the overcharging protection bin.

[0009] Preferably, a charging port is fixedly connected to the overcharging protection compartment, and the other end of the reset spring is fixedly connected to the vertical connecting rod.

[0010] Preferably, a vertical support plate is fixedly connected to the overcharge protection bin, and the arc-shaped groove is slidably connected to the connecting protrusion.

[0011] Preferably, the protection bearing is rotatably connected to the threaded rod, and a protection groove is provided on the overcharge protection bin.

[0012] Preferably, the guide block is fixedly connected to the insulating protection rod.

[0013] Compared with the related art, the protective plate of a small soft-pack lithium battery provided by the utility model has the following beneficial effects:

[0014] The utility model provides a protection plate for a small soft-pack lithium battery, which is provided with an overcharge protection compartment. When the device is used for charging, when the voltage detector detects that the voltage reaches a set value, it will quickly send a signal to the controller. At this time, the controller will control the protection motor to start, and then the protection motor will drive the threaded rod to rotate, and the threaded rod will drive the nut block to move. At this time, the nut block will drive the insulating protection rod to move, and the insulating protection rod will squeeze the vertical connecting rod. The connecting protrusion on the vertical connecting rod will slide inside the arc groove, and the power can be cut off in time. The device has an overcharge protection function. Once the voltage detector detects that the voltage reaches the set value, it will quickly control the device to cut off the power, which can effectively avoid safety problems such as battery heating, smoking and even explosion caused by overcharging, thereby achieving the effect of extending the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a preferred embodiment of a protective plate for a small soft-pack lithium battery provided by the utility model;

[0016] Figure 2 for Figure 1 The schematic cross-sectional view of the overcharge protection bin shown;

[0017] Figure 3 for Figure 2 A schematic diagram of the bottom plate of the device shown;

[0018] Figure 4 for Figure 3 A schematic top view of the bottom plate of the device shown;

[0019] Figure 5 for Figure 2 An enlarged schematic diagram of part A is shown.

[0020] Numbers in the figure: 1. device body, 2. protection plate, 3. overcharge protection compartment, 4. charging port, 5. heat dissipation grille, 6. protection motor, 7. vertical support rod, 8. device bottom plate, 9. voltage detector, 10. partition plate, 11. controller, 12. protection groove, 13. positive pole, 14. negative pole, 15. motor fixing frame, 16. insulating connecting rod, 17. vertical connecting rod, 18. connecting protrusion, 19. arc groove, 20. arc rod, 21. protection shaft, 22. reset spring, 23. connecting fixing block, 24. spring fixing rod, 25. insulating block, 26. arc limiting block, 27. connecting shaft, 28. guide groove, 29. guide block, 30. insulating protection rod, 31. nut block, 32. threaded rod, 33. protection bearing. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a protective plate for a small soft-pack lithium battery provided by the utility model; Figure 2 for Figure 1 The schematic cross-sectional view of the overcharge protection bin shown; Figure 3 for Figure 2 A schematic diagram of the bottom plate of the device shown; Figure 4 for Figure 3 A schematic top view of the bottom plate of the device shown; Figure 5 for Figure 2 The enlarged schematic diagram of part A is shown. A protection plate for a small soft-pack lithium battery comprises: a device body 1, a protection plate 2 is fixedly connected to the device body 1, an overcharge protection bin 3 is fixedly connected to the protection plate 2, a motor fixing frame 15 is fixedly connected to the overcharge protection bin 3, a protection motor 6 is fixedly connected to the motor fixing frame 15, a threaded rod 32 is provided on the output end of the protection motor 6, a nut block 31 is threadedly connected to the threaded rod 32, an insulating protection rod 30 is fixedly connected to the nut block 31, a guide groove 28 is provided on the overcharge protection bin 3, a guide block 29 is slidably connected to the guide groove 28, a protection bearing 33 is provided on the overcharge protection bin 3, a device bottom plate 8 is fixedly connected to the overcharge protection bin 3, a connection fixing block 23 is fixedly connected to the device bottom plate 8, and a protection rotating shaft is provided on the connection fixing block 23 21, a vertical connecting rod 17 is arranged on the protection shaft 21, a connecting protrusion 18 is fixedly connected to the vertical connecting rod 17, an arc-shaped limiting block 26 is fixedly connected to the connecting protrusion 18, an arc-shaped rod 20 is fixedly connected to the device bottom plate 8, an arc-shaped groove 19 is opened on the arc-shaped rod 20, a spring fixing rod 24 is fixedly connected to the device bottom plate 8, an insulating block 25 is fixedly connected to the spring fixing rod 24, a reset spring 22 is fixedly connected to the insulating block 25, a connecting shaft 27 is fixedly connected to the vertical connecting rod 17, an insulating connecting rod 16 is arranged on the connecting shaft 27, a voltage detector 9 is installed on the overcharging protection bin 3, a controller 11 is installed on the overcharging protection bin 3, and the controller 11 has the function of receiving the signal of the voltage detector 9 and then controlling the operation of the protection motor 6.

[0023] The overcharge protection compartment 3 is provided with a negative electrode 14, and the overcharge protection compartment 3 is provided with a positive electrode 13. The overcharge protection compartment 3 has the function of protecting the battery from overcharging.

[0024] A partition plate 10 is fixedly connected to the overcharge protection bin 3 , and a heat dissipation grille 5 is provided on the overcharge protection bin 3 . The heat dissipation grille 5 has the function of dissipating heat for the overcharge protection bin 3 .

[0025] The overcharge protection compartment 3 is fixedly connected with a charging port 4 , and the other end of the reset spring 22 is fixedly connected with the vertical connecting rod 17 . The reset spring 22 has the function of assisting the vertical connecting rod 17 in resetting.

[0026] A vertical support plate 7 is fixedly connected to the overcharge protection bin 3 , and the arc groove 19 is slidably connected to the connection protrusion 18 . The vertical support plate 7 has the function of supporting the overcharge protection bin 3 .

[0027] The protection bearing 33 is rotatably connected to the threaded rod 32 . A protection groove 12 is provided on the overfill protection bin 3 . The protection bearing 33 has the function of supporting the threaded rod 32 .

[0028] The guide block 29 is fixedly connected to an insulating protection rod 30 , and the insulating protection rod 30 has a function of preventing short circuit.

[0029] The working principle of the protection board of a small soft-pack lithium battery provided by the utility model is as follows:

[0030] When the device is used for charging, when the voltage detector 9 detects that the voltage reaches the set value, it will quickly send a signal to the controller 11. At this time, the controller 11 will control the protection motor 6 to start, and then the protection motor 6 will drive the threaded rod 32 to rotate, and the threaded rod 32 will drive the nut block 31 to move. At this time, the nut block 31 will drive the insulating protection rod 30 to move, and the insulating protection rod 30 will squeeze the vertical connecting rod 17. At this time, the vertical connecting rod 17 will rotate around the protection shaft 21, and the connecting protrusion 18 on the vertical connecting rod 17 will slide inside the arc groove 19. At this time, the insulating connecting rod 16 on the vertical connecting rod 17 will simultaneously drive the two vertical connecting rods 17 to move. At this time, the power can be cut off in time to prevent overcharging. When the voltage detector 9 detects that the external power supply is disconnected, it will transmit a signal to the controller 11. At this time, the controller 11 will control the protection motor 6 to rotate in the opposite direction. At this time, the threaded rod 32 will drive the nut block 31 to move. At this time, the reset spring 22 will use elastic force to pull the vertical connecting rod 17 back to its original position, which is convenient for the next charging.

[0031] Compared with the related art, the protective plate of a small soft-pack lithium battery provided by the utility model has the following beneficial effects:

[0032] The utility model provides a protection plate for a small soft-pack lithium battery, which is provided with an overcharge protection compartment 3. When the device is used for charging, when the voltage detector 9 detects that the voltage reaches a set value, it will quickly send a signal to the controller 11. At this time, the controller 11 will control the protection motor 6 to start, and then the protection motor 6 will drive the threaded rod 32 to rotate, and the threaded rod 32 will drive the nut block 31 to move. At this time, the nut block 31 will drive the insulating protection rod 30 to move, and the insulating protection rod 30 will squeeze the vertical connecting rod 17. The connecting protrusion 18 on the vertical connecting rod 17 will slide inside the arc groove 19, and the power can be cut off in time. The device has an overcharge protection function. Once the voltage detector 9 detects that the voltage reaches the set value, it will quickly control the device to cut off the power, which can effectively avoid safety problems such as battery heating, smoking and even explosion caused by overcharging, thereby achieving the effect of extending the service life of the device.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A protective plate for a small soft-pack lithium battery, characterized in that: include: The device body is fixedly connected with a protection plate, the protection plate is fixedly connected with an overcharge protection bin, the overcharge protection bin is fixedly connected with a motor fixing frame, the motor fixing frame is fixedly connected with a protection motor, a threaded rod is arranged on the output end of the protection motor, a nut block is threadedly connected with the threaded rod, an insulating protection rod is fixedly connected with the nut block, a guide groove is provided on the overcharge protection bin, a guide block is slidably connected with the guide groove, a protection bearing is arranged on the overcharge protection bin, a device bottom plate is fixedly connected with the overcharge protection bin, a connection fixing block is fixedly connected with the device bottom plate, the connection A protection shaft is provided on the connecting fixed block, a vertical connecting rod is provided on the protection shaft, a connecting protrusion is fixedly connected to the vertical connecting rod, an arc-shaped limiting block is fixedly connected to the connecting protrusion, an arc-shaped rod is fixedly connected to the bottom plate of the device, an arc-shaped groove is provided on the arc-shaped rod, a spring fixing rod is fixedly connected to the bottom plate of the device, an insulating block is fixedly connected to the spring fixing rod, a reset spring is fixedly connected to the insulating block, a connecting shaft is fixedly connected to the vertical connecting rod, an insulating connecting rod is provided on the connecting shaft, a voltage detector is installed on the overcharging protection bin, and a controller is installed on the overcharging protection bin.

2. A protective plate for a small soft-pack lithium battery according to claim 1, characterized in that: The overcharge protection bin is provided with a negative electrode, and the overcharge protection bin is provided with a positive electrode.

3. A protective plate for a small soft-pack lithium battery according to claim 1, characterized in that: A partition plate is fixedly connected to the overcharge protection bin, and a heat dissipation grille is arranged on the overcharge protection bin.

4. A protective plate for a small soft-pack lithium battery according to claim 1, characterized in that: The overcharge protection compartment is fixedly connected with a charging port, and the other end of the reset spring is fixedly connected to the vertical connecting rod.

5. The protective plate for a small soft-pack lithium battery according to claim 1, characterized in that: A vertical support plate is fixedly connected to the overcharge protection bin, and the arc groove is slidably connected to the connecting protrusion.

6. A protective plate for a small soft-pack lithium battery according to claim 1, characterized in that: The protection bearing is rotatably connected to the threaded rod, and a protection groove is provided on the overfill protection bin.

7. A protective plate for a small soft-pack lithium battery according to claim 1, characterized in that: The guide block is fixedly connected to the insulating protection rod.

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