Lithium battery protection board capable of preventing overcharge

Abstract

The utility model provides a lithium battery protection plate capable of preventing overcharge, which relates to the technical field of lithium battery protection plates, and comprises a charging connecting sleeve, one end of the charging connecting sleeve is fixedly connected with a charging protection plate, and one end of the charging protection plate is fixedly provided with an elastic insulating seat. The other end of the charging protection plate is fixedly provided with a protection rubber pad, and the interior of the protection rubber pad is fixedly provided with a charging guide frame. The lithium battery overcharge-preventing protection plate has the advantages that the deformable protection structures are arranged on the upper side and the lower side of the lithium battery overcharge-preventing protection plate, the influence of external force on the protection plate is reduced by utilizing the characteristic that the protection structures deform due to the external force, and the stability of the protection plate is enhanced; meanwhile, a protection structure is arranged between the protection plate and the battery pack, so that the protection plate can be effectively supported, the contact area of the protection plate during installation is increased, the shearing force borne by the protection plate under the action of external force is reduced, the protection plate is not easy to damage, and the safety and stability of the protection plate during installation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery protection plates, in particular to a lithium battery protection plate for preventing overcharging. Background Art

[0002] With the continuous development of new energy technologies, lithium batteries are widely used in the energy supply systems of electric equipment. Existing lithium batteries include multiple parallel-connected single-cell strings. In order to prevent lithium batteries from being damaged due to overcharging, over-discharging, overcurrent, short circuit, and ultra-high temperature charging and discharging during use, a lithium battery protection board needs to be connected to the lithium battery circuit.

[0003] CN202321497212.6 introduces a lithium battery protection board that prevents overcharging. Through the cooperation of the bottom plate, the top plate and the protective cover, the protection board body can be provided with surrounding protection, thereby effectively avoiding the problem of the protection board body being directly impacted or contaminated by dust. On the other hand, when the lithium battery protection board vibrates as a whole, the spring and the connector can provide buffer protection for the protection board, which can effectively reduce the intensity of the impact on the protection board body, thereby reducing the probability of the welding pins of the protection board body breaking. The above improvements comprehensively strengthen the protection effect of the protection board body and improve the durability of the lithium battery protection board. The present application provides a new technical solution to protect the lithium battery protection board and improve the stability and safety of the lithium battery protection board. Utility Model Content

[0004] Therefore, the purpose of the present invention is to provide a lithium battery protection board for preventing overcharging, so as to solve the problems mentioned in the background technology and overcome the shortcomings in the prior art.

[0005] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides a lithium battery protection plate for preventing overcharging, including a charging protection plate, a plurality of lithium batteries are arranged inside a lithium battery pack, one end of the lithium battery is provided with a positive and negative electrode, one end of the positive and negative electrodes is sleeved with a charging connection sleeve, one end of the charging connection sleeve is fixedly connected to a charging protection plate, one end of the charging protection plate is fixedly installed with an elastic insulating seat, the other end of the charging protection plate is fixedly installed with a protective rubber pad, a charging guide frame is fixedly installed inside the protective rubber pad, one end of the charging guide frame is sleeved with a fixing plate, the fixing plate is fixed inside A protective end cover is fixedly installed on the top of the charging protection board, a circuit board, a MOS switch and precision components are arranged inside the charging protection board, the elastic insulating seat comprises a fixing seat, a supporting spring and an insulating protection block, the fixing seat is placed on the top surface of the lithium battery, a supporting spring is fixedly installed inside the fixing seat, one end of the supporting spring is fixedly installed with an insulating protection block movably connected to the fixing seat, the insulating protection block is fixedly installed on the bottom of the charging protection board, the protective end cover comprises a torsion spring and a flip plate, the torsion spring is fixedly installed inside the fixing plate, and one end of the torsion spring is fixedly installed with a flip plate rotatably connected to the fixing plate.

[0006] Preferably, any of the above schemes has a charging slot adapted to the positive and negative electrodes opened inside the charging connection sleeve, and the charging connection sleeve is located between the positive and negative electrodes and the charging protection board.

[0007] By adopting the above technical solution: connecting the positive and negative electrodes through the charging connection sleeve, the lithium battery pack can be charged through the charging protection board, and the charging of the lithium battery can be protected from overcharging.

[0008] Preferably, in any of the above schemes, the charging protection board is located at the top of the lithium battery pack.

[0009] The above technical solution is adopted: a corresponding charging protection element is arranged inside the charging protection board to adjust the charging current to ensure the stability of the charging protection.

[0010] When the charging protection plate is subjected to external force, it exerts force on the insulating protection block, and the insulating protection block drives the supporting spring to deform. At the same time, the insulating protection block moves inside the fixed seat, and friction between the insulating protection block and the fixed seat reduces the displacement of the charging protection plate caused by the external force, thereby reducing the vibration of the charging protection plate.

[0011] Preferably, any of the above schemes is that the protective rubber pad is fixedly installed on the top of the charging protection plate, and a connecting groove adapted to the charging guide frame is opened in the middle of the protective rubber pad.

[0012] The above technical solution is adopted: the deformation of the protective rubber pad itself is used to weaken the external force acting on the charging protection plate, thereby further enhancing the protective effect of the charging protection plate, and the protective rubber pad is used to limit the charging guide frame.

[0013] Preferably, any of the above schemes is that the fixing plate is fixedly installed on the top of the lithium battery pack, the fixing plate is located above the protective rubber pad, and a movable groove adapted to the protective end cover is opened in the middle of the fixing plate.

[0014] The above technical solution is adopted: the lithium battery pack is sealed by using a fixing plate to ensure the safety of the internal structure of the lithium battery pack, and the protective end cover is supported by using the fixing plate.

[0015] According to the charging requirement, a force is applied to the flip plate to make it drive the torsion spring to twist, and the twisted torsion spring is used to enable the flip plate to automatically reset after charging.

[0016] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0017] 1. Deformable protective structures are set on both the upper and lower sides of the lithium battery overcharge protection plate. The deformation characteristics of the protective structure under external force are used to reduce the influence of external force on the protection plate and enhance the stability of the protection plate itself. At the same time, a protective structure is set between the protection plate and the battery pack to effectively support the protection plate, increase the contact area of ​​the protection plate installation, reduce the shear force on the protection plate when it is subjected to external force, make the protection plate not easily damaged, and improve the safety and stability of the protection plate installation.

[0018] 2. A flip protective end cover that can automatically reset is set at the charging port to protect the lithium battery pack. The lithium battery pack is closed when not charging to ensure the safety of the lithium battery.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a structural schematic diagram according to an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of an explosion structure according to an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the protective end cover according to an embodiment of the utility model;

[0024] Figure 4 It is a schematic cross-sectional structure diagram of the elastic insulating seat according to an embodiment of the utility model;

[0025] Among them: 1-lithium battery pack, 2-positive and negative electrodes, 3-charging connection sleeve, 4-charging protection plate, 5-elastic insulating seat, 51-fixing seat, 52-support spring, 53-insulating protection block, 6-protective rubber pad, 7-charging guide frame, 8-fixing plate, 9-protective end cover, 91-torsion spring, 92-flip plate, 10-movable slot. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0027] like Figure 1-4 As shown, a lithium battery protection plate for preventing overcharging in an embodiment of the utility model comprises a charging protection plate 4, a plurality of lithium batteries are arranged inside a lithium battery pack 1, one end of the lithium battery is provided with a positive and negative electrode 2, one end of the positive and negative electrodes 2 is sleeved with a charging connection sleeve 3, one end of the charging connection sleeve 3 is fixedly connected with a charging protection plate 4, one end of the charging protection plate 4 is fixedly installed with an elastic insulating seat 5, the other end of the charging protection plate 4 is fixedly installed with a protective rubber pad 6, a charging guide frame 7 is fixedly installed inside the protective rubber pad 6, one end of the charging guide frame 7 is sleeved with a fixing plate 8, a protective end cover 9 is fixedly installed inside the fixing plate 8, and the charging protection plate 4 is fixedly installed with a protective rubber pad 6. The interior of the protective plate 4 is provided with a circuit board, a MOS switch and precision components. The elastic insulating seat 5 includes a fixed seat 51, a support spring 52 and an insulating protection block 53. The fixed seat 51 is placed on the top surface of the lithium battery. The interior of the fixed seat 51 is fixedly installed with a support spring 52. One end of the support spring 52 is fixedly installed with an insulating protection block 53 movably connected to the fixed seat 51. The insulating protection block 53 is fixedly installed at the bottom of the charging protection plate 4. The protective end cover 9 includes a torsion spring 91 and a flip plate 92. The torsion spring 91 is fixedly installed inside the fixed plate 8. One end of the torsion spring 91 is fixedly installed with a flip plate 92 rotatably connected to the fixed plate 8.

[0028] Preferably, any of the above schemes has a charging slot adapted to the positive and negative electrodes 2 opened inside the charging connection sleeve 3 , and the charging connection sleeve 3 is located between the positive and negative electrodes 2 and the charging protection board 4 .

[0029] By adopting the above technical solution: by connecting the charging connection sleeve 3 and the positive and negative electrodes 2, the lithium battery pack 1 can be charged through the charging protection board 4, and the charging of the lithium battery is protected from overcharging.

[0030] Preferably, according to any of the above solutions, the charging protection board 4 is located at the top of the lithium battery pack 1 .

[0031] The above technical solution is adopted: a corresponding charging protection element is arranged inside the charging protection board 4 to adjust the charging current to ensure the stability of the charging protection.

[0032] When the charging protection plate 4 is acted upon by an external force, it applies a force to the insulating protection block 53, and the insulating protection block 53 drives the supporting spring 52 to deform. At the same time, the insulating protection block 53 moves inside the fixing seat 51, and friction between the insulating protection block 53 and the fixing seat 51 reduces the displacement of the charging protection plate 4 caused by the external force, thereby reducing the vibration of the charging protection plate 4.

[0033] Preferably, any of the above schemes is that the protective rubber pad 6 is fixedly installed on the top of the charging protection plate 4, and a connecting groove adapted to the charging guide frame 7 is opened in the middle of the protective rubber pad 6.

[0034] The above technical solution is adopted: the deformation of the protective rubber pad 6 itself is used to weaken the external force acting on the charging protection plate 4, thereby further enhancing the protective effect on the charging protection plate 4, and the protective rubber pad 6 is used to limit the charging guide frame 7.

[0035] Preferably, any of the above schemes is that the fixing plate 8 is fixedly installed on the top of the lithium battery pack 1, the fixing plate 8 is located above the protective rubber pad 6, and a movable groove 10 adapted to the protective end cover 9 is opened in the middle of the fixing plate 8.

[0036] The above technical solution is adopted: the lithium battery pack 1 is sealed by the fixing plate 8 to ensure the safety of the internal structure of the lithium battery pack 1, and the protective end cover 9 is supported by the fixing plate 8 at the same time.

[0037] According to the charging requirement, a force is applied to the flip plate 92 to cause it to drive the torsion spring 91 to twist, and the twisted torsion spring 91 is used to enable the flip plate 92 to automatically reset after charging.

[0038] The utility model is a lithium battery protection board for preventing overcharging, and its working principle is as follows:

[0039] The charging connection sleeve 3 is sleeved on the positive and negative electrodes 2, the fixing seat 51 is placed on the lithium battery, and the fixing plate 8 is installed on the lithium battery pack 1 using screws. When the fixing plate 8 is subjected to pressure, the fixing plate 8 squeezes the protective rubber pad 6, and the protective rubber pad 6 weakens the external force. When the charging protection plate 4 is subjected to external force, it applies pressure to the insulating protection block 53, so that the insulating protection block 53 compresses the supporting spring 52.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. Deformable protective structures are set on both the upper and lower sides of the lithium battery overcharge protection plate. The deformation characteristics of the protective structure under external force are used to reduce the influence of external force on the protection plate and enhance the stability of the protection plate itself. At the same time, a protective structure is set between the protection plate and the battery pack to effectively support the protection plate, increase the contact area of ​​the protection plate installation, reduce the shear force on the protection plate when it is subjected to external force, make the protection plate not easily damaged, and improve the safety and stability of the protection plate installation.

[0042] 2. A flip protective end cover that can automatically reset is provided at the position of the charging port to protect the lithium battery pack 1, and the lithium battery pack 1 is closed when not charging to ensure the safety of the lithium battery.

Claims

1. A lithium battery protection board for preventing overcharging, comprising a charging protection board (4), a lithium battery pack (1) having a plurality of lithium batteries arranged inside, and a positive and negative electrode (2) arranged at one end of the lithium battery, characterized in that: One end of the positive and negative electrodes (2) is sleeved with a charging connection sleeve (3), one end of the charging connection sleeve (3) is fixedly connected to a charging protection board (4), one end of the charging protection board (4) is fixedly installed with an elastic insulating seat (5), the other end of the charging protection board (4) is fixedly installed with a protective rubber pad (6), a charging guide frame (7) is fixedly installed inside the protective rubber pad (6), one end of the charging guide frame (7) is sleeved with a fixing plate (8), a protective end cover (9) is fixedly installed inside the fixing plate (8), a circuit board, a MOS switch and precision components are arranged inside the charging protection board (4), and the elastic insulating seat (5) includes a fixing plate (8) and a protective end cover (9). The invention relates to a charging protection plate (4), a charging protection plate (55), a charging protection plate (56), a charging protection plate (57), a charging protection plate (58), a charging protection plate (59), a charging protection plate (51), and a charging protection plate (52). The charging protection plate (53) comprises a fixing seat (51), a supporting spring (52) and an insulating protection block (53), wherein the fixing seat (51) is placed on the top surface of the lithium battery, the fixing seat (51) is fixedly installed with a supporting spring (52) inside, one end of the supporting spring (52) is fixedly installed with an insulating protection block (53) movably connected to the fixing seat (51), the insulating protection block (53) is fixedly installed at the bottom of the charging protection plate (4), the protective end cover (9) comprises a torsion spring (91) and a flip plate (92), the torsion spring (91) is fixedly installed inside the fixing plate (8), and one end of the torsion spring (91) is fixedly installed with a flip plate (92) rotatably connected to the fixing plate (8).

2. A lithium battery protection board for preventing overcharging as claimed in claim 1, characterized in that: The charging connection sleeve (3) is provided with a charging slot adapted to the positive and negative electrodes (2) inside, and the charging connection sleeve (3) is located between the positive and negative electrodes (2) and the charging protection plate (4).

3. A lithium battery protection board for preventing overcharging as claimed in claim 2, characterized in that: The charging protection board (4) is located at the top of the lithium battery pack (1).

4. A lithium battery protection board for preventing overcharging as claimed in claim 3, characterized in that: The protective rubber pad (6) is fixedly mounted on the top of the charging protection plate (4), and a connecting groove adapted to the charging guide frame (7) is provided in the middle of the protective rubber pad (6).

5. A lithium battery protection board for preventing overcharging as claimed in claim 4, characterized in that: The fixing plate (8) is fixedly mounted on the top of the lithium battery pack (1), the fixing plate (8) is located above the protective rubber pad (6), and a movable groove (10) adapted to the protective end cover (9) is provided in the middle of the fixing plate (8).

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