Lithium ion battery with self-protection function

Abstract

The utility model discloses a lithium ion battery with a self-protection function, and relates to the technical field of lithium ion batteries. The lithium ion battery with the self-protection function comprises a battery box, an indicating lamp, a wiring port and a leakage protector are arranged at the front end of the battery box, main heat dissipation holes are formed in the bottom of the battery box, auxiliary heat dissipation holes are formed in the two sides of the battery box, and a heat dissipation fan and a control host are arranged at the inner bottom of the battery box; a hollow bottom plate is fixedly connected to the interior of the battery box, a heat conduction partition plate is arranged on the hollow bottom plate, a lithium ion battery is fixedly connected to the interior of the heat conduction partition plate, and a temperature sensor is arranged on the heat conduction partition plate. And when the heat dissipation fan still cannot meet the heat dissipation requirement after being started, the sliding plate can automatically move upwards to open the auxiliary heat dissipation holes to enhance heat dissipation, so that the lithium ion battery is prevented from being overheated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery with a self-protection function. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. Lithium-ion battery has the advantages of high energy density, high average output voltage, low self-discharge, excellent cycle performance, fast charge and discharge, and does not contain toxic and harmful substances. It is called a green battery.

[0003] The utility model with publication number CN209804767U discloses a lithium-ion battery with a self-protection function, including a battery box, a cover plate and a lithium-ion battery body, wherein the top of the battery box is detachably connected with the cover plate, the inner cavity of the battery box is provided with a lithium-ion battery body, and the lithium-ion battery body is specifically provided with a plurality of groups, the bottom of the lithium-ion battery body is fixedly provided with a hollow bottom plate, and one side of the lithium-ion battery body is provided with a hollow partition plate. In the above application document, the working temperature of the lithium-ion battery body during use is monitored by a temperature sensor, and the monitored temperature data is sent to a temperature control host. When the working temperature of the lithium-ion battery body is higher than a preset temperature value, a cooling fan is turned on by the temperature control host for heat dissipation, and when the lithium-ion battery body is short-circuited or fails, the cooling fan can no longer meet the heat dissipation requirements and no measures are taken, which may cause damage to the lithium-ion battery body. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a lithium-ion battery with a self-protection function, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: a lithium-ion battery with a self-protection function, including a battery box, the front end of the battery box is provided with an indicator light, a wiring port, and a leakage protector, the bottom of the battery box is provided with a main heat dissipation hole, and both sides of the battery box are provided with secondary heat dissipation holes, the inner bottom of the battery box is provided with a cooling fan and a control host, the battery box is fixedly connected to the inside of the hollow bottom plate, the hollow bottom plate is provided with a heat conductive partition, the inside of the heat conductive partition is fixedly connected to the lithium-ion battery, and the heat conductive partition is provided with a temperature sensor, the control host is electrically connected to the cooling fan, the temperature sensor on the heat conductive partition, and the lithium-ion battery through wires, the leakage protector is electrically connected to the lithium-ion battery and the wiring port through wires, and the electric The side of the battery box is provided with an enhanced heat dissipation mechanism, and the top of the battery box is provided with a reminder mechanism. The enhanced heat dissipation mechanism includes a fixed block, a slot, an air pressure chamber, and a thermal expansion airbag. The fixed block is fixedly connected to the side of the battery box, and the bottom of the fixed block is fixedly connected to a return spring. The end of the return spring away from the fixed block is fixedly connected to a sliding plate, and the sliding plate is slidably connected to the side of the battery box. A groove is provided on the side of the sliding plate close to the battery box, and an arc block is slidably connected to the inside of the groove through a compression spring. The slot is provided on the side of the battery box, and the air pressure chamber is fixedly connected to the inner wall of the battery box. A piston rod A is slidably connected to the inside of one end of the air pressure chamber, and a piston rod B is slidably connected to the inside of the other end of the air pressure chamber. The thermal expansion airbag is fixedly connected to the side of the heat-conducting partition.

[0005] Preferably, the reminder mechanism includes a slide groove, a fixed plate, and a warning bell. The slide groove is opened at the top of the fixed block. The inside of the slide groove is slidably connected to a slide rod. The side of the slide rod is provided with teeth. The fixed plate and the warning bell are both fixedly connected to the top of the battery box. The fixed plate is rotatably connected to a rotating rod. The end of the rotating rod away from the fixed plate is fixedly connected to a gear. The side of the rotating rod is fixedly connected to an impact rod. The rotation of the gear drives the rotating rod to rotate, and the rotation of the rotating rod drives the impact rod to rotate.

[0006] Preferably, the arc block is in the slot in an initial state, and the straight surface of the arc block fits with the top of the slot, so that the sliding plate cannot move upward.

[0007] Preferably, the reset spring is in a stretched state in the initial state, and the sliding plate is in contact with the auxiliary heat dissipation hole in the initial state. The sliding plate initially closes the auxiliary heat dissipation hole to reduce the entry of moisture and dust. When the arc block retracts into the groove, the reset spring will rebound and drive the sliding plate to move upward.

[0008] Preferably, the thermal expansion airbag is in a contracted state in the initial state, the piston rod A is close to the thermal expansion airbag, and the piston rod B is close to the arc block. The thermal expansion airbag will squeeze the piston rod A when it expands when heated. The squeezed movement of the piston rod A will drive the piston rod B to move through the air pressure chamber, and the movement of the piston rod B will squeeze the arc block.

[0009] Preferably, the teeth on the gear mesh with the teeth on the slide rod, the impact rod is close to the warning bell, the upward movement of the slide rod drives the gear to rotate, and the impact rod rotates with the rotating rod to hit the warning bell.

[0010] The utility model provides a lithium-ion battery with a self-protection function. It has the following beneficial effects:

[0011] (1) The present application is provided with an enhanced heat dissipation mechanism, so that the auxiliary heat dissipation holes are usually in a closed state to reduce the entry of moisture and dust. When the heat dissipation demand is still not met after the heat dissipation fan is started, the sliding plate will automatically move upward to open the auxiliary heat dissipation holes to enhance heat dissipation and prevent the lithium-ion battery from overheating.

[0012] (2) The spring of the present application is provided with a reminder mechanism, so that when the sliding plate moves upward to open the auxiliary heat dissipation hole, it will drive the rotating rod to rotate. The rotation of the rotating rod drives the impact rod to knock the warning bell to make a sound, reminding the user to check the status of the lithium-ion battery in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0015] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0016] Figure 4 For this utility model Figure 3 The enlarged structural diagram of part A in the middle;

[0017] Figure 5 It is a schematic diagram of the structure of the utility model.

[0018] In the figure: 1. battery box; 2. indicator light; 3. wiring port; 4. leakage protector; 5. main heat dissipation hole; 6. auxiliary heat dissipation hole; 7. cooling fan; 8. control host; 9. hollow bottom plate; 10. heat-conducting baffle; 11. lithium-ion battery; 12. enhanced heat dissipation mechanism; 121. fixed block; 122. reset spring; 123. sliding plate; 124. groove; 125. compression spring; 126. arc block; 127. slot; 128. air pressure chamber; 129. piston rod A; 1210. piston rod B; 1211. thermal expansion airbag; 13. reminder mechanism; 131. slide groove; 132. slide rod; 133. fixed plate; 134. rotating rod; 135. gear; 136. impact rod; 137. warning bell. DETAILED DESCRIPTION

[0019] 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 of the embodiments.

[0020] Embodiment 1

[0021] See also Figure 1-5A lithium-ion battery with a self-protection function comprises a battery box 1, the front end of the battery box 1 is provided with an indicator light 2, a wiring port 3, and a leakage protector 4, the bottom of the battery box 1 is provided with a main heat dissipation hole 5, and both sides of the battery box 1 are provided with auxiliary heat dissipation holes 6, the inner bottom of the battery box 1 is provided with a cooling fan 7 and a control host 8, the inside of the battery box 1 is fixedly connected with a hollow bottom plate 9, the hollow bottom plate 9 is provided with a heat conductive partition 10, the inside of the heat conductive partition 10 is fixedly connected with a lithium-ion battery 11, and the heat conductive partition 10 is provided with a temperature sensor, the control host 8 is electrically connected with the cooling fan 7, the temperature sensor on the heat conductive partition 10, and the lithium-ion battery 11 through a wire, and the leakage protector 4 is provided with a main heat dissipation hole 5, and the battery box 1 is provided with a secondary heat dissipation hole 6, and the inner bottom of the battery box 1 is provided with a cooling fan 7, a control host 8, and a control host 8. The protector 4 is electrically connected to the lithium-ion battery 11 and the wiring port 3 through a wire. A heat dissipation enhancement mechanism 12 is provided on the side of the battery box 1. A reminder mechanism 13 is provided on the top of the battery box 1. The heat dissipation enhancement mechanism 12 includes a fixed block 121, a slot 127, an air pressure chamber 128, and a thermal expansion airbag 1211. The fixed block 121 is fixedly connected to the side of the battery box 1. A reset spring 122 is fixedly connected to the bottom of the fixed block 121. The reset spring 122 is in a stretched state in the initial state. The sliding plate 123 is in contact with the auxiliary heat dissipation hole 6 in the initial state. The sliding plate 123 initially closes the auxiliary heat dissipation hole 6 to reduce the entry of moisture and dust. The arc block 126 retracts into the groove 12 4, the return spring 122 will rebound and drive the sliding plate 123 to move upward. The end of the return spring 122 away from the fixed block 121 is fixedly connected to the sliding plate 123. The sliding plate 123 is slidably connected to the side of the battery box 1. A groove 124 is provided on the side of the sliding plate 123 close to the battery box 1. The interior of the groove 124 is slidably connected to an arc block 126 through a compression spring 125. The slot 127 is provided on the side of the battery box 1. The arc block 126 is initially located in the slot 127. The straight surface of the arc block 126 fits with the top of the slot 127. The straight surface of the arc block 126 fits with the top of the slot 127 so that the sliding plate 123 cannot move upward. The air pressure chamber 128 is fixed. It is fixedly connected to the inner wall of the battery box 1, one end of the air pressure chamber 128 is internally slidably connected to the piston rod A129, and the other end of the air pressure chamber 128 is internally slidably connected to the piston rod B1210, and the thermal expansion airbag 1211 is fixedly connected to the side of the heat-conducting partition 10. The thermal expansion airbag 1211 is in a contracted state in the initial state, the piston rod A129 is close to the thermal expansion airbag 1211, and the piston rod B1210 is close to the arc block 126. The thermal expansion airbag 1211 will squeeze the piston rod A129 when it expands when heated, and the piston rod A129 will be squeezed and moved through the air pressure chamber 128, driving the piston rod B1210 to move, and the movement of the piston rod B1210 will squeeze the arc block 126.

[0022] When in use, the battery box 1 is installed. When the lithium-ion battery 11 in the battery box 1 generates heat, the temperature sensor on the heat-conducting partition 10 transmits information to the control host 8 through the wire. The control host 8 controls the cooling fan 7 to start to improve heat dissipation. When the temperature still rises after the cooling fan 7 is started, the thermal expansion airbag 1211 will expand due to heat and squeeze the piston rod A129. The squeezed movement of the piston rod A129 will drive the piston rod B1210 to move through the air pressure chamber 128. The movement of the piston rod B1210 will squeeze When the arc block 126 is squeezed and retracted into the groove 124, the compression spring 125 is tightened. When the arc block 126 is retracted into the groove 124, the return spring 122 will rebound and drive the sliding plate 123 to move upward to open the auxiliary heat dissipation hole 6, thereby enhancing heat dissipation and protecting the lithium-ion battery 11 from overheating. When the temperature drops, the sliding plate 123 can be pulled down. When the arc block 126 is rebounded by the compression spring 125 and stuck into the slot 127, the sliding plate 123 is fixed again, and the entry of dust and moisture can be reduced at this time.

[0023] Embodiment 2

[0024] See also Figure 1-5 On the basis of the first embodiment, the reminding mechanism 13 includes a slide groove 131, a fixed plate 133, and a warning bell 137. The slide groove 131 is opened at the top of the fixed block 121. The slide rod 132 is slidably connected inside the slide groove 131. The side of the slide rod 132 is provided with teeth. The fixed plate 133 and the warning bell 137 are fixedly connected to the top of the battery box 1. The fixed plate 133 is rotatably connected with a rotating rod 134. The end of the rotating rod 134 away from the fixed plate 133 is fixedly connected with a gear 135. The side of the rotating rod 134 is fixedly connected with a striking rod 136. The rotation of the gear 135 drives the rotating rod 134 to rotate, and the rotation of the rotating rod 134 drives the striking rod 136 to rotate. The teeth on the gear 135 are meshed with the teeth on the sliding rod 132. The striking rod 136 is close to the warning bell 137. The upward movement of the sliding rod 132 will drive the gear 135 to rotate. The striking rod 136 rotates with the rotating rod 134 and will hit the warning bell 137.

[0025] During use, based on the first embodiment, the upward movement of the sliding plate 123 will drive the sliding rod 132 to move upward. The upward movement of the sliding rod 132 will engage with the gear 135 and drive the gear 135 to rotate. The rotation of the gear 135 will drive the rotating rod 134 to rotate. The rotation of the rotating rod 134 will drive the impact rod 136 to rotate. The impact rod 136 rotates with the rotating rod 134 and hits the warning bell 137 to make a sound, reminding the user to check the working status of the lithium-ion battery 11.

[0026] 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 within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lithium-ion battery with a self-protection function, comprising a battery box (1), characterized in that: The front end of the battery box (1) is provided with an indicator light (2), a wiring port (3), and a leakage protector (4); the bottom of the battery box (1) is provided with a main heat dissipation hole (5); both sides of the battery box (1) are provided with auxiliary heat dissipation holes (6); the bottom of the battery box (1) is provided with a heat dissipation fan (7) and a control host (8); the inside of the battery box (1) is fixedly connected with a hollow bottom plate (9); a heat conduction baffle (10) is provided on the hollow bottom plate (9); the inside of the heat conduction baffle (10) is provided with a heat conduction baffle (10); The heat conducting baffle (10) is fixedly connected to a lithium ion battery (11), a temperature sensor is arranged on the heat conducting baffle (10), the control host (8) is electrically connected to the heat dissipation fan (7), the temperature sensor on the heat conducting baffle (10), and the lithium ion battery (11) through a wire, the leakage protector (4) is electrically connected to the lithium ion battery (11) and the wiring port (3) through a wire, a heat dissipation enhancement mechanism (12) is arranged on the side of the battery box (1), and a reminder mechanism (13) is arranged on the top of the battery box (1); The enhanced heat dissipation mechanism (12) comprises a fixed block (121), a slot (127), an air pressure chamber (128), and a thermal expansion airbag (1211); the fixed block (121) is fixedly connected to the side of the battery box (1); a return spring (122) is fixedly connected to the bottom of the fixed block (121); an end of the return spring (122) away from the fixed block (121) is fixedly connected to a sliding plate (123); the sliding plate (123) is slidably connected to the side of the battery box (1); and a side of the sliding plate (123) close to the battery box (1) A groove (124) is provided, and the interior of the groove (124) is slidably connected to an arc block (126) via a compression spring (125); the slot (127) is provided on the side of the battery box (1); the air pressure chamber (128) is fixedly connected to the inner wall of the battery box (1); one end of the air pressure chamber (128) is slidably connected to a piston rod A (129); the other end of the air pressure chamber (128) is slidably connected to a piston rod B (1210); and the thermal expansion airbag (1211) is fixedly connected to the side of the heat-conducting partition (10).

2. A lithium-ion battery with a self-protection function according to claim 1, characterized in that: The reminder mechanism (13) comprises a slide groove (131), a fixed plate (133), and a warning bell (137); the slide groove (131) is opened at the top of the fixed block (121); a slide rod (132) is slidably connected inside the slide groove (131); teeth are arranged on the side of the slide rod (132); the fixed plate (133) and the warning bell (137) are both fixedly connected to the top of the battery box (1); a rotating rod (134) is rotatably connected to the fixed plate (133); a gear (135) is fixedly connected to one end of the rotating rod (134) away from the fixed plate (133); and a collision rod (136) is fixedly connected to the side of the rotating rod (134).

3. A lithium-ion battery with a self-protection function according to claim 1, characterized in that: The arc-shaped block (126) is initially located in the slot (127), and the straight surface of the arc-shaped block (126) is in contact with the top of the slot (127).

4. A lithium-ion battery with a self-protection function according to claim 1, characterized in that: The return spring (122) is in a stretched state in the initial state, and the sliding plate (123) is in contact with the auxiliary heat dissipation hole (6) in the initial state.

5. A lithium-ion battery with a self-protection function according to claim 1, characterized in that: In the initial state, the heat expansion airbag (1211) is in a contracted state, the piston rod A (129) is close to the heat expansion airbag (1211), and the piston rod B (1210) is close to the arc block (126).

6. A lithium-ion battery with a self-protection function according to claim 2, characterized in that: The teeth on the gear (135) are meshed with the teeth on the slide bar (132), and the impact rod (136) is close to the warning bell (137).

Images