An overload protection device for lithium batteries used in vehicle power supplies

Abstract

This utility model provides an overload protection device for lithium batteries used in vehicle power supplies, relating to the field of lithium battery technology. The device includes a protective shell with a rotatable sealing cap on top. The interior of the protective shell has longitudinally symmetrically distributed fixing plates. A venting pad is installed on the inner bottom wall of the protective shell, directly below the two fixing plates. A working cavity is formed on one side of the protective shell, housing a linkage mechanism. An adjustment mechanism is located at the intersection of the linkage mechanism and the fixing plates, and a drive mechanism is provided at the drive end of the linkage mechanism. This utility model provides an overload protection device for lithium batteries used in vehicle power supplies that can clamp and fix the lithium battery, preventing it from moving inside the protective shell and avoiding damage caused by collisions, thus improving the protective effect of the protective shell on the lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to an overload protection device for lithium batteries used in vehicle power supplies. Background Technology

[0002] Most car jump starters use lead-acid batteries. Lithium-ion batteries, on the other hand, use lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution; hence, they are also called lithium metal batteries. Unlike other batteries, lithium-ion batteries have high charging density, long lifespan, and high unit cost. However, lithium-ion batteries are very fragile internally and are easily damaged by impacts and pressure, therefore protective devices are needed to protect the battery body.

[0003] However, current lithium battery protection devices cannot effectively secure the lithium battery body, causing the lithium battery to shake and be damaged inside the protective casing.

[0004] Therefore, it is necessary to provide a new type of overload protection device for lithium batteries used in vehicle power supplies to solve the above-mentioned technical problems. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides an overload protection device for lithium batteries used in vehicle power supplies.

[0006] This utility model provides an overload protection device for lithium batteries used in vehicle power supplies, including a protective shell. The top of the protective shell is rotatably covered with a sealing cover. The interior of the protective shell is movably provided with longitudinally symmetrically distributed fixing plates. A venting pad is installed on the inner bottom wall of the protective shell, directly below the two fixing plates. A working cavity is formed inside one side of the protective shell. The working cavity houses a linkage mechanism. An adjustment mechanism is provided at the intersection of the linkage mechanism and the fixing plates. A drive mechanism is provided at the drive end of the linkage mechanism.

[0007] Preferably, the protective shell has receiving and releasing grooves on both the front and rear inner walls.

[0008] Preferably, the drive mechanism includes a protective shell mounted on the rear outer wall of the protective shell, and the drive motor is stored inside the protective shell.

[0009] Preferably, the drive end of the drive motor is fixed with a drive shaft, and the end of the drive shaft away from the drive motor extends rotatably into the interior of the working cavity.

[0010] Preferably, the linkage mechanism includes a linkage screw installed on the outer wall of the end of the drive shaft, and the outer wall of the end of the linkage screw away from the drive shaft is connected to the bearing on the rear inner wall of the working cavity.

[0011] Preferably, the outer surface of the linkage screw is threaded with symmetrically distributed linkage nuts, and both linkage nuts are located inside the working cavity.

[0012] Preferably, the adjustment mechanism includes symmetrical adjustment grooves formed on the inner wall of one side of the protective shell, and both adjustment grooves communicate with the working cavity.

[0013] Preferably, an adjusting slide rod is movably provided inside the adjusting slide groove. One end of the adjusting slide rod inside the working cavity is connected to the linkage nut, and the other end inside the protective shell is connected to the fixed clamping plate.

[0014] Compared with related technologies, the overload protection device for lithium batteries in vehicle power supplies provided by this utility model has the following advantages:

[0015] This utility model provides an overload protection device for lithium batteries in vehicle power supplies. Through the set drive mechanism, the linkage mechanism can be driven to rotate in both directions inside the working cavity. This causes the adjustment mechanism to drive the fixing plates to move back and forth in the longitudinal direction inside the protective shell. This allows the inner walls of the two fixing plates to be moved to fit tightly against the outer walls of the lithium battery on both sides, thereby clamping and fixing the lithium battery. This prevents the lithium battery from shaking inside the protective shell, avoiding damage caused by collisions, and thus improving the protective effect of the protective shell on the lithium battery. Attached Figure Description

[0016] Figure 1 A schematic diagram of a preferred embodiment of an overload protection device for a vehicle power supply provided by this utility model;

[0017] Figure 2 for Figure 1 The diagram shows a rear view of the protective casing.

[0018] Figure 3 for Figure 1 The diagram shows the opening structure of the sealing cap;

[0019] Figure 4 for Figure 1 The diagram shows a top-view cross-sectional view of the protective shell.

[0020] The following are the labels in the diagram: 1. Protective shell; 2. Sealing cover; 3. Drive mechanism; 31. Protective shell; 32. Drive motor; 33. Drive shaft; 4. Fixing clamp; 5. Adjustment mechanism; 51. Adjustment slide; 52. Adjustment slide rod; 6. Receiving and releasing slot; 7. Ventilation pad; 8. Working chamber; 9. Linkage mechanism; 91. Linkage screw; 92. Linkage nut. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please refer to the following: Figures 1 to 4 An overload protection device for a vehicle power supply lithium battery includes a protective shell 1. A sealing cover 2 is rotatably closed on the top of the protective shell 1. The protective shell 1 has longitudinally symmetrically distributed fixing plates 4 movably arranged inside. A venting pad 7 is installed on the inner bottom wall of the protective shell 1 and directly below the two fixing plates 4. A working cavity 8 is formed inside one side of the protective shell 1. A linkage mechanism 9 is housed inside the working cavity 8. An adjustment mechanism 5 is provided at the intersection of the linkage mechanism 9 and the fixing plates 4. A drive mechanism 3 is provided at the drive end of the linkage mechanism 9.

[0023] In use, the drive motor 32 is first started, allowing the drive shaft 33 to rotate in both directions. This causes the linkage screw 91, installed at the end of the drive shaft 33, to rotate synchronously inside the working chamber 8. At this time, the two linkage nuts 92, symmetrically sleeved on the outer wall of the linkage screw 91, will move longitudinally closer or further apart on the outer wall of the linkage screw 91 as the linkage screw 91 rotates. This causes the two arc-shaped fixing plates 4, respectively installed at one end of the two adjusting slide rods 52, to move longitudinally closer or further apart inside the protective shell 1. This allows the inner walls of the two fixing plates 4 to be moved to fit tightly against the outer walls of the lithium battery on both sides, thereby clamping and fixing the lithium battery. This prevents the lithium battery from shaking inside the protective shell 1, avoiding damage caused by collisions, and thus improving the protective effect of the protective shell 1 on the lithium battery.

[0024] In the specific implementation process, such as Figure 3 and Figure 4 As shown, the protective shell 1 has receiving and releasing grooves 6 on both the front and rear inner walls.

[0025] In use, the set receiving and dispensing slot 6 can play a certain role in storing the fixing clamp 4. When the lithium battery is put into the protective shell 1, the two fixing clamps 4 are first moved into the receiving and dispensing slot 6 to avoid the receiving and dispensing slot 6 blocking the lithium battery when it is put into the protective shell 1.

[0026] refer to Figure 1 and Figure 4 As shown, the drive mechanism 3 includes a protective shell 31 installed on the outer wall of the rear side of the protective shell 1, and the drive motor 32 is stored inside the protective shell 31.

[0027] When in use, the drive motor 32 is stored inside the protective shell 31, which can protect it. The heat dissipation vents on the surface can cool down the heat generated by the drive motor 32 during operation.

[0028] refer to Figure 1 and Figure 2 As shown, the drive end of the drive motor 32 is fixed with a drive shaft 33, and the end of the drive shaft 33 away from the drive motor 32 extends rotatably into the interior of the working cavity 8.

[0029] In use, the drive shaft 33 is installed on the drive end of the drive motor 32. When the drive motor 32 is running, the drive shaft 33 can rotate clockwise and counterclockwise in both directions, in preparation for driving the longitudinal movement of the fixed clamp 4.

[0030] refer to Figure 3 and Figure 4 As shown, the linkage mechanism 9 includes a linkage screw 91 installed on the outer wall of the end of the drive shaft 33. The outer wall of the linkage screw 91 away from the drive shaft 33 is connected to the bearing on the rear inner wall of the working cavity 8.

[0031] When in use, the linkage screw 91 is connected to the drive shaft 33. When the drive shaft 33 rotates, the linkage screw 91 will also rotate synchronously inside the working cavity 8.

[0032] refer to Figure 4 As shown, the outer surface of the linkage screw 91 is threaded with symmetrically distributed linkage nuts 92, and both linkage nuts 92 are located inside the working cavity 8.

[0033] In use, two linkage nuts 92 are threaded onto the outer wall of the linkage screw 91. When the linkage screw 91 rotates, the two linkage nuts 92 will move longitudinally closer or further away from the outer wall of the linkage screw 91.

[0034] refer to Figure 3 and Figure 4 As shown, the adjustment mechanism 5 includes symmetrical adjustment grooves 51 on one side of the inner wall of the protective shell 1, and both adjustment grooves 51 are connected to the working cavity 8.

[0035] refer to Figure 4 As shown, an adjusting slide rod 52 is movably arranged inside the adjusting slide groove 51. One end of the adjusting slide rod 52 inside the working cavity 8 is connected to the linkage nut 92, and the other end inside the protective shell 1 is connected to the fixed clamping plate 4.

[0036] In use, the two ends of the adjusting slide rod 52 are connected to the linkage nut 92 and the fixing clamp 4 respectively. When the linkage nut 92 moves longitudinally with the rotation of the linkage screw 91, the adjusting slide rod 52 will drive the fixing clamp 4 to move synchronously inside the protective shell 1, so that the fixing clamp 4 can be moved to fit tightly against the outer wall of the lithium battery, thus fixing the lithium battery.

[0037] The working principle of the lithium battery overload protection device for vehicle power supply provided by this utility model is as follows:

[0038] First, start the drive motor 32, which allows the drive shaft 33 to rotate in both directions. This causes the linkage screw 91, installed at the end of the drive shaft 33, to rotate synchronously inside the working chamber 8. At this time, the two linkage nuts 92, symmetrically sleeved on the outer wall of the linkage screw 91, will move longitudinally closer or further apart on the outer wall of the linkage screw 91 as the linkage screw 91 rotates. This causes the two arc-shaped fixing plates 4, respectively installed at one end of the two adjusting slide rods 52, to move longitudinally closer or further apart inside the protective shell 1. This allows the inner walls of the two fixing plates 4 to be moved to fit tightly against the outer walls of the lithium battery on both sides, thereby clamping and fixing the lithium battery. This prevents the lithium battery from shaking inside the protective shell 1, avoiding damage caused by collisions, and thus improving the protective effect of the protective shell 1 on the lithium battery.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An overload protection device for a lithium battery used in a vehicle power supply, comprising a protective shell (1), wherein a sealing cap (2) is rotatably closed on the top of the protective shell (1), characterized in that, The protective shell (1) is provided with longitudinally symmetrical fixed clamps (4) inside. A breathable pad (7) is installed on the inner bottom wall of the protective shell (1) and directly below the two fixed clamps (4). A working cavity (8) is formed inside one side of the protective shell (1). A linkage mechanism (9) is housed inside the working cavity (8). An adjustment mechanism (5) is provided at the intersection of the linkage mechanism (9) and the fixed clamps (4). A drive mechanism (3) is provided at the drive end of the linkage mechanism (9).

2. The overload protection device for a lithium battery in a vehicle power supply according to claim 1, characterized in that, The protective shell (1) has a receiving and releasing groove (6) on both the front and rear inner walls.

3. The overload protection device for a lithium battery in a vehicle power supply according to claim 1, characterized in that, The drive mechanism (3) includes a protective shell (31) installed on the rear outer wall of the protective shell (1), and a drive motor (32) is stored inside the protective shell (31).

4. The overload protection device for a lithium battery in a vehicle power supply according to claim 3, characterized in that, The drive end of the drive motor (32) is fixed with a drive shaft (33), and the end of the drive shaft (33) away from the drive motor (32) extends rotatably into the interior of the working cavity (8).

5. The overload protection device for a lithium battery in a vehicle power supply according to claim 4, characterized in that, The linkage mechanism (9) includes a linkage screw (91) installed on the outer wall of the end of the drive shaft (33). The outer wall of the linkage screw (91) away from the drive shaft (33) is connected to the bearing on the rear inner wall of the working cavity (8).

6. The overload protection device for a lithium battery in a vehicle power supply according to claim 5, characterized in that, The outer surface of the linkage screw (91) is threaded with symmetrically distributed linkage nuts (92), and both linkage nuts (92) are located inside the working cavity (8).

7. The overload protection device for a lithium battery in a vehicle power supply according to claim 1, characterized in that, The adjustment mechanism (5) includes adjustment grooves (51) symmetrically opened on the inner wall of one side of the protective shell (1), and both adjustment grooves (51) are connected to the working cavity (8).

8. The overload protection device for a lithium battery in a vehicle power supply according to claim 7, characterized in that, An adjusting slide rod (52) is movably installed inside the adjusting slide groove (51). One end of the adjusting slide rod (52) inside the working cavity (8) is connected to the linkage nut (92), and the other end inside the protective shell (1) is connected to the fixed clamping plate (4).

Images