CN108550775B - Automatic cut-off device for battery current - Google Patents
Automatic cut-off device for battery current Download PDFInfo
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- CN108550775B CN108550775B CN201810374376.7A CN201810374376A CN108550775B CN 108550775 B CN108550775 B CN 108550775B CN 201810374376 A CN201810374376 A CN 201810374376A CN 108550775 B CN108550775 B CN 108550775B
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- 238000004880 explosion Methods 0.000 abstract description 15
- 230000002159 abnormal effect Effects 0.000 abstract description 13
- 239000000126 substance Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 33
- 239000004020 conductor Substances 0.000 description 9
- 230000005856 abnormality Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012811 non-conductive material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The embodiment of the invention provides an automatic battery current cutting device, and belongs to the field of battery accessories. Comprising the following steps: stress structure, outage structure and lever structure; the stress structure is connected with the lever structure; the bottom surface of the stress structure is contacted with the exhaust hole; the outer diameter of the stress structure is smaller than the inner diameter of the round hole where the exhaust hole is positioned; one end of the power-off structure is movably connected with the terminal board, and the power-off structure comprises a connector structure. The automatic current cutting device is arranged outside the battery, so that the drift of the internal resistance of the battery is avoided, and the battery is easy to open during vibration, so that the effective safety protection is achieved. In addition, because the automatic current cutting device is arranged outside the battery, dangerous accidents such as explosion caused by contact with internal chemical solution when the battery is abnormal are avoided, the possibility of explosion of the battery is reduced, and the safety is improved.
Description
Technical Field
The invention relates to the field of battery accessories, in particular to an automatic battery current cutting device.
Background
Lithium batteries are gradually accepted in the market due to their excellent characteristics, and are rapidly developed. However, in the use process of the lithium battery, unsafe problems such as battery explosion exist in the case of overcharge, short circuit and the like of the battery.
In order to solve the above problems, the technical scheme provided by the prior art is to connect a CID (Current Interrupt device, current automatic cutting device) combined cover plate and an aluminum cover plate together through sealing welding as a current automatic cutting device, and to arrange the current automatic cutting device inside a battery.
But in the process of using the technical scheme, as the automatic current cutting device is arranged inside the battery, and the top cover and the aluminum cover plate are not connected, the top cover is easy to move, so that the battery internal resistance drifts, the battery cannot be resisted, the welding is easy to open in the battery vibration process, and the effective safety protection cannot be achieved. In addition, since the automatic current interruption device is provided inside the battery, when the battery is abnormal, the automatic current interruption device is likely to be in contact with an internal chemical solution to cause dangerous accidents such as explosion. The possibility of explosion of the battery is increased, and the potential safety hazard is further increased.
Disclosure of Invention
In order to solve the problems in the prior art, the embodiment of the invention provides an automatic battery current cutting device. The technical scheme is as follows:
An automatic battery current cutoff device, the device comprising:
a power-off structure, a stress structure and a lever structure;
One end of the power-off structure is connected with the terminal board through an elastic component, and the elastic component is provided with conductivity
The middle part of the power-off structure comprises a round concave structure;
The stress structure is connected with the lever structure; the bottom surface of the stress structure is in contact with the exhaust hole; the part of the bottom surface of the power-off structure, which is contacted with the stress structure, at least comprises an elastic structure; the outer diameter of the stress structure is smaller than the inner diameter of a round hole where the exhaust hole is located;
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is positioned in a groove on the upper surface of the stress structure, and the other end of the lever structure is in contact with the limiting structure;
When the exhaust hole row is not deformed, the power-off structure is in contact with the terminal seat, and the input and output currents of the battery are transmitted;
When the vent hole row is deformed, the stress structure moves along the round hole and drives one end of the lever structure connected with the lever structure to move, and under the action of the elastic structure and the limiting structure, the round concave structure of the power-off structure is disconnected with the terminal seat to disconnect the input and output current of the battery.
Preferably, the device further comprises a limiting structure, and the limiting structure is connected with the inner side surface of the shell through an elastic device.
Preferably, the method comprises the steps of,
The stress structure is cylindrical, and the lower surface of the stress structure is an inclined plane.
Preferably, the method comprises the steps of,
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is connected with the upper surface of the stress structure, and the other end of the lever structure is connected with the limiting structure;
when the exhaust hole row deforms, one end connected with the upper surface of the stress structure moves along with the movement of the stress structure, the position of the limiting structure changes, and the state of the power-off structure is controlled to be a power-off state.
The lever structure is connected with the stress structure and the power-off structure, the stress structure moves, and the state of the power-off structure is changed through the lever structure.
Preferably, the method comprises the steps of,
The upper surface of the stress structure comprises a cylindrical protruding structure, and the cylindrical protruding structure corresponds to the connecting sub-structure.
Preferably, the stress structure further comprises:
The upper surface of the stress structure comprises a strip-shaped protruding structure, and the strip-shaped protruding structure corresponds to the connecting sub-structure.
Preferably, the method comprises the steps of,
The connection substructure included in the power-off structure is a circular concave structure.
Preferably, the method comprises the steps of,
The top end of the limiting structure comprises a protruding part;
The power-off structure is in the power supply state, and the protruding part is positioned on the other end opposite to one end, which is movably connected with the terminal board, of the power-off structure;
the power-off structure is in the power-off state, and the protruding part is positioned at the other end, opposite to the movable connection end of the power-off structure and the terminal board, of the power-off structure and is disconnected; or alternatively
The top end of the limiting structure comprises a hollow part, the other end of the limiting structure opposite to the end, which is movably connected with the terminal board, of the power-off structure comprises a protruding part, and the protruding part corresponds to the hollow part in size;
The power-off structure is in the power supply state, and the protruding part is buckled on the hollow part;
the power-off structure is in the power-off state, and the protruding portion is disconnected from the hollow portion.
In addition, there is provided an automatic current cutting device applied to a battery, characterized in that the device includes:
Stress structure, outage structure and lever structure;
the stress structure is connected with the lever structure; the bottom surface of the stress structure is in contact with the exhaust hole; the outer diameter of the stress structure is smaller than the inner diameter of a round hole where the exhaust hole is located;
one end of the power-off structure is movably connected with the terminal board, and the power-off structure comprises a connector structure;
When the exhaust hole row is not deformed, the connection substructure is in contact with the terminal seat, and the input and output currents of the battery are transmitted;
When the vent hole row is deformed, the stress structure moves along the round hole and drives one end of the lever structure connected with the lever structure to move, so that the connection sub-structure is disconnected with the terminal seat, the stress structure is contacted with the connection sub-structure, and the input and output currents of the battery are disconnected.
Alternatively to this, the method may comprise,
The stress structure is cylindrical, and the lower surface of the stress structure is an inclined plane;
The limiting structure is connected with the side surface of the shell through an elastic part;
The top end of the limiting structure comprises a hollow part, the other end of the limiting structure opposite to the end, which is movably connected with the terminal board, of the power-off structure comprises a protruding part, and the protruding part corresponds to the hollow part in size;
The power-off structure is in the power supply state, and the protruding part is buckled on the hollow part;
the power-off structure is in the power-off state, and the protruding portion is disconnected from the hollow portion.
The embodiment of the invention provides an automatic battery current cutting device, which comprises: stress structure, outage structure and lever structure; the stress structure is connected with the lever structure; the bottom surface of the stress structure is contacted with the exhaust hole; the outer diameter of the stress structure is smaller than the inner diameter of the round hole where the exhaust hole is positioned; one end of the power-off structure is movably connected with the terminal board, and the power-off structure comprises a connector structure; when the exhaust hole row is not deformed, the connection substructure is contacted with the terminal seat to transmit the input and output currents of the battery; when the vent hole row is deformed, the stress structure moves along the round hole and drives the lever structure to move with the connected end of the lever structure, so that the connection sub-structure is disconnected with the terminal seat, the stress structure is contacted with the connection sub-structure, and the input and output currents of the battery are disconnected. The current is cut off through deformation triggering of the exhaust hole, so that automatic current cutting off when the battery is abnormal is never realized, and compared with manual control of current cutting off, the safety problem caused by abnormal battery can be prevented more timely, and the reliability is higher. In addition, the automatic current cutting device is arranged outside the battery, so that the drift of the internal resistance of the battery is avoided, and the battery is easy to open in the vibration process, so that the effective safety protection is achieved. In addition, because the automatic current cutting device is arranged outside the battery, dangerous accidents such as explosion caused by contact with internal chemical solution when the battery is abnormal are avoided, the possibility of explosion of the battery is reduced, and the safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an automatic battery current cutting device according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of an automatic battery current cutting device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides an automatic battery current cutting device which is applied to a battery at least comprising an exhaust hole. In addition, the device provided by the embodiment of the invention can be fixedly arranged on the battery or detachably arranged on the battery, and is convenient to replace and sustainable to use.
Example 1
The embodiment of the invention provides an automatic battery current cutting device, which comprises:
A power-off structure, a stress structure and a lever structure; one end of the power-off structure is connected with the terminal board through an elastic part, and the elastic part has conductivity;
the middle part of the power-off structure comprises a round concave structure; the stress structure is connected with the lever structure; the bottom surface of the stress structure is contacted with the exhaust hole; the part of the bottom surface of the power-off structure, which is contacted with the stress structure, at least comprises an elastic structure; the outer diameter of the stress structure is smaller than the inner diameter of the round hole where the exhaust hole is positioned; the elastic structure at least comprises an elastic sheet;
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is positioned in a groove on the upper surface of the stress structure, and the other end of the lever structure is contacted with the limiting structure;
When the exhaust hole row is not deformed, the power-off structure is in contact with the terminal seat, and the input and output currents of the battery are transmitted;
When the vent hole row is deformed, the stress structure moves along the round hole and drives the lever structure to move with the connected end of the lever structure, and under the action of the elastic structure and the limiting structure, the round concave structure of the power-off structure is disconnected with the terminal seat to disconnect the input and output current of the battery.
Optionally, the device further comprises a limiting structure, and the limiting structure is connected with the inner side surface of the shell through an elastic device.
Optionally, the stress structure is cylindrical, and a lower surface of the stress structure is an inclined plane.
Optionally, the fulcrum of the lever structure is located on the inner bottom surface of the shell, one end of the lever structure is connected with the upper surface of the stress structure, and the other end of the lever structure is connected with the limiting structure;
When the exhaust hole row deforms, one end connected with the upper surface of the stress structure moves along with the movement of the stress structure, the position of the limiting structure changes, and the state of the power-off structure is controlled to be the power-off state.
The lever structure is connected with the stress structure and the power-off structure, the stress structure moves, and the state of the power-off structure is changed through the lever structure.
Optionally, the upper surface of the stress structure comprises a cylindrical protruding structure, the cylindrical protruding structure corresponding to the connector sub-structure.
Optionally, the stress structure further comprises:
the upper surface of the stress structure comprises a strip-shaped protruding structure, and the strip-shaped protruding structure corresponds to the connecting sub-structure.
Optionally, the connection sub-structure included in the power-off structure is a circular concave structure.
Optionally, the top end of the limiting structure comprises a protruding portion;
the power-off structure is in a power supply state, and the protruding part is positioned on the other end opposite to one end of the power-off structure, which is movably connected with the terminal board;
the power-off structure is in a power-off state, and the protruding part is positioned at the other end, opposite to the movable connection end of the power-off structure and the terminal board, of the power-off structure and is disconnected; or alternatively
The top end of the limiting structure comprises a hollow part, the other end of the limiting structure opposite to the end, which is movably connected with the terminal board, of the power-off structure comprises a protruding part, and the protruding part corresponds to the hollow part in size;
the power-off structure is in a power supply state, and the convex part is buckled on the hollow part;
The power-off structure is in a power-off state, and the convex part is disconnected with the hollow part.
The embodiment of the invention provides an automatic cutting device for battery current, which triggers cutting of current through deformation of an exhaust hole, never realizes automatic cutting of current when the battery is abnormal, and can prevent safety problems caused by the battery abnormality more timely and has higher reliability compared with manual control of current cutting. In addition, the automatic current cutting device is arranged outside the battery, so that the drift of the internal resistance of the battery is avoided, and the battery is easy to open in the vibration process, so that the effective safety protection is achieved. In addition, because the automatic current cutting device is arranged outside the battery, dangerous accidents such as explosion caused by contact with internal chemical solution when the battery is abnormal are avoided, the possibility of explosion of the battery is reduced, and the safety is improved.
Example two
The embodiment of the invention provides an automatic battery current cutting device, which comprises:
Stress structure, outage structure and lever structure;
The stress structure is connected with the lever structure; the bottom surface of the stress structure is contacted with the exhaust hole; the outer diameter of the stress structure is smaller than the inner diameter of the round hole where the exhaust hole is positioned;
One end of the power-off structure is connected with the terminal board through an elastic part, and the elastic part has conductivity;
when the exhaust hole row is not deformed, the connection substructure is contacted with the terminal seat to transmit the input and output currents of the battery;
when the vent hole row is deformed, the stress structure moves along the round hole and drives the lever structure to move with the connected end of the lever structure, so that the connection sub-structure is disconnected with the terminal seat, the stress structure is contacted with the connection sub-structure, and the input and output currents of the battery are disconnected.
Preferably, the device further comprises a limiting structure, and the limiting structure is connected with the inner side surface of the shell through an elastic device.
Preferably, the method comprises the steps of,
The stress structure is cylindrical, and the lower surface of the stress structure is an inclined plane.
Preferably, the method comprises the steps of,
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is connected with the upper surface of the stress structure, and the other end of the lever structure is connected with the limiting structure;
When the exhaust hole row deforms, one end connected with the upper surface of the stress structure moves along with the movement of the stress structure, the position of the limiting structure changes, and the state of the power-off structure is controlled to be the power-off state.
The lever structure is connected with the stress structure and the power-off structure, the stress structure moves, and the state of the power-off structure is changed through the lever structure.
Preferably, the method comprises the steps of,
The upper surface of the stress structure comprises a cylindrical protruding structure, which corresponds to the connection sub-structure.
Preferably, the stress structure further comprises:
the upper surface of the stress structure comprises a strip-shaped protruding structure, and the strip-shaped protruding structure corresponds to the connecting sub-structure.
Preferably, the method comprises the steps of,
The connection substructure included in the power-off structure is a circular concave structure.
Preferably, the method comprises the steps of,
The top end of the limiting structure comprises a protruding part;
the power-off structure is in a power supply state, and the protruding part is positioned on the other end opposite to one end of the power-off structure, which is movably connected with the terminal board;
The power-off structure is in a power-off state, and the protruding part is positioned at the other end, opposite to the movable connection end of the power-off structure 12 and the terminal board, for disconnection; or alternatively
The top end of the limiting structure comprises a hollow part, the other end of the limiting structure opposite to the end, movably connected with the terminal board, of the power-off structure 12 comprises a protruding part, and the protruding part corresponds to the hollow part in size;
the power-off structure is in a power supply state, and the convex part is buckled on the hollow part;
The power-off structure is in a power-off state, and the convex part is disconnected with the hollow part.
The embodiment of the invention provides an automatic cutting device for battery current, which triggers cutting of current through deformation of an exhaust hole, never realizes automatic cutting of current when the battery is abnormal, and can prevent safety problems caused by the battery abnormality more timely and has higher reliability compared with manual control of current cutting. In addition, the automatic current cutting device is arranged outside the battery, so that the drift of the internal resistance of the battery is avoided, and the battery is easy to open in the vibration process, so that the effective safety protection is achieved. In addition, because the automatic current cutting device is arranged outside the battery, dangerous accidents such as explosion caused by contact with internal chemical solution when the battery is abnormal are avoided, the possibility of explosion of the battery is reduced, and the safety is improved.
Example III
The embodiment of the invention provides an automatic battery current cutting device, which is shown by referring to fig. 1, and comprises the following components:
A power-off structure 11, a stress structure 12, and a lever structure 13;
One end of the power-off structure 11 is connected with the terminal board through an elastic component, and the elastic component has conductivity;
The middle part of the power-off structure 11 comprises a circular concave structure; the stress structure 12 is connected with the lever structure 13; the bottom surface of the stress structure 12 is in contact with the vent hole; the portion of the bottom surface of the power-off structure 11 contacting the stress structure 12 includes at least one elastic structure 15; the outer diameter of the stress structure 12 is smaller than the inner diameter of the round hole where the vent hole is located; the elastic structure 15 at least comprises a spring sheet;
The fulcrum of the lever structure 13 is positioned on the inner bottom surface of the shell, one end of the lever structure 13 is positioned in a groove on the upper surface of the stress structure 12, and the other end of the lever structure 13 is in contact with the limiting structure 14;
When the exhaust hole row is not deformed, the power-off structure 11 is in contact with the terminal seat, and the input and output currents of the battery are transmitted;
Specifically, the round concave structure is made of conductive materials, and after the connection substructure is contacted with the terminal seat, battery current passes through the terminal plate, the connection substructure and the terminal seat to form a loop, so that the input and output currents of the transmission battery are realized.
When the vent hole row is deformed, the stress structure 12 moves along the round hole and drives the lever structure 13 to move at the end connected with the lever structure, and under the action of the elastic structure 15 and the limiting structure 14, the round concave structure of the power-off structure 11 is disconnected with the terminal seat, so that the input and output currents of the battery are disconnected.
Specifically, after the abnormality occurs in the battery and gas is generated, the exhaust hole rows deform and bulge upwards, and an acting force is applied to the stress structure 12 along the direction of the round hole, so that the stress structure 12 moves along the round hole; the stress structure 12 is linked with the lever structure 13, when the stress structure 12 moves along the round hole, the lever structure 13 is driven to move with the limiting structure 14 at the connected end, so that the limiting structure 14 releases the acting force applied by the power-off structure 11 in the power supply state, under the action of the elastic structure 15 and the limiting structure 14, the power-off is shifted by taking the end movably connected with the terminal plate as the center of a circle, the connection sub-structure is disconnected with the terminal seat, and the input and output currents of the battery are disconnected.
Preferably, the device further comprises a limiting structure 14, and the limiting structure 14 is connected with the inner side surface of the shell through an elastic device. In practical applications, the elastic means may be a spring.
Preferably, the method comprises the steps of,
The stress structure 12 is cylindrical, and the lower surface of the stress structure 12 is a slope. The shape of the stress structure 12 corresponds to the shape of the hole-like location of the vent hole, and the embodiment of the present invention is not limited to the specific shape.
Preferably, the method comprises the steps of,
The fulcrum of the lever structure 13 is positioned on the inner bottom surface of the shell, one end of the lever structure 13 is connected with the upper surface of the stress structure 12, and the other end of the lever structure 13 is connected with the limiting structure 14;
when the vent row deforms, one end connected with the upper surface of the stress structure 12 moves along with the movement of the stress structure 12, the position of the limiting structure 14 changes, and the state of the power-off structure 11 is controlled to be a power-off state.
The lever structure 13 and the stress structure 12 are connected with the power-off structure 11, the stress structure 12 moves, and the state of the power-off structure 1122 is changed through the lever structure 13.
Preferably, the method comprises the steps of,
The upper surface of the stress structure 12 comprises a cylindrical protruding structure, which corresponds to the connection sub-structure.
Preferably, the method comprises the steps of,
The power-off structure 11 includes a connection sub-structure that is a circular concave structure. The round concave structure is made of conductive materials.
Preferably, the method comprises the steps of,
The top end of the limiting structure 14 comprises a protruding part;
The power-off structure 11 is in a power supply state, and the protruding part is positioned on the other end opposite to the end, movably connected with the terminal board, of the power-off structure 11; the power-off structure 11 is in a power supply state, the protruding part clamps the other end opposite to the movable connection end of the power-off structure 11 and the terminal board to provide downward pressure, and the elasticity provided by the strip-shaped concave structure is overcome, so that the round concave structure is more stable in contact with the terminal base, and current transmission is facilitated.
The power-off structure 11 is in a power-off state, and the protruding part is positioned at the other end, opposite to the movable connection end of the power-off structure 11 and the terminal board, of the protruding part to be disconnected; or alternatively
The top end of the limiting structure 14 comprises a hollow part, the other end opposite to the movable connection end of the power-off structure 11 and the terminal board 24 comprises a convex part, and the convex part corresponds to the hollow part in size;
The power-off structure 11 is in a power supply state, and the convex part is buckled on the hollow part; the power-off structure 11 is in a power supply state, the convex part is buckled on the hollow part, and the elasticity provided by the strip-shaped concave structure is overcome, so that the round concave structure is contacted with the terminal seat more stably, and the transmission of current is facilitated.
The power-off structure 11 is in a power-off state, and the convex portion is disconnected from the hollow portion.
Optionally, the method further comprises:
The two wing parts of the power-off structure 11 are flat, and the middle part of the power-off structure 11 comprises a round concave structure;
When the vent hole row is not deformed, the circular concave structure is contacted with the terminal seat to transmit the input and output currents of the battery;
When the vent hole row is deformed, the stress structure 12 moves along the round hole and drives the lever structure 13 to move at one end connected with the lever structure, and under the action of the round concave structure, the round concave structure is disconnected from the terminal seat, so that the input and output currents of the battery are disconnected;
Preferably, in practical application, in order to increase stability and durability of the device, the portion contacting the terminal seat is made of conductive material, the portion providing the elastic force is made of non-conductive material, and the rest is made of other materials.
Optionally, for convenience in deformation, the thickness of the exhaust hole may be 0.05-0.3 mm, and the embodiment of the present invention is not limited to a specific thickness.
Optionally, one end movably connected with the terminal board comprises two symmetrical protruding parts;
In addition, the movable connection between one end of the device and the terminal board can be understood as that two symmetrical protruding parts are positioned below corresponding positions of the terminal board, and the movable connection between the device and the terminal board is realized by limiting the two symmetrical protruding parts through the limiting device, and the size of the limiting part in the limiting device corresponds to the size of the two symmetrical protruding parts; the contact between the circular concave structure and the terminal seat when the vent hole row is not deformed is ensured, and the abnormality occurs in the battery and the recovery after the abnormality is solved.
It is noted that the automatic current cutting device and the battery are connected through a connecting structure, the automatic current cutting device is located at one side of the connecting structure, the other side of the connecting structure comprises a rectangular groove structure, an oval hole structure is arranged between the rectangular groove and the current switching device, and the thickness of the connecting structure is not limited in the embodiment of the invention.
The embodiment of the invention provides an automatic cutting device for battery current, which triggers cutting of current through deformation of an exhaust hole, never realizes automatic cutting of current when the battery is abnormal, and can prevent safety problems caused by the battery abnormality more timely and has higher reliability compared with manual control of current cutting. In addition, the automatic current cutting device is arranged outside the battery, so that the drift of the internal resistance of the battery is avoided, and the battery is easy to open in the vibration process, so that the effective safety protection is achieved. In addition, because the automatic current cutting device is arranged outside the battery, dangerous accidents such as explosion caused by contact with internal chemical solution when the battery is abnormal are avoided, the possibility of explosion of the battery is reduced, and the safety is improved.
Example IV
The embodiment of the invention provides an automatic battery current cutting device, which comprises:
Stress structure, outage structure and lever structure;
The stress structure is connected with the lever structure; the bottom surface of the stress structure is contacted with the exhaust hole; the outer diameter of the stress structure is smaller than the inner diameter of the round hole where the exhaust hole is positioned; the embodiment of the invention is not limited to a specific inner diameter and outer diameter dimension.
One end of the power-off structure is connected with the terminal board through an elastic part, and the elastic part has conductivity; the power-off structure comprises a connection substructure;
when the exhaust hole row is not deformed, the connection substructure is contacted with the terminal seat to transmit the input and output currents of the battery;
Specifically, the round concave structure is made of conductive materials, and after the connection substructure is contacted with the terminal seat, battery current passes through the terminal plate, the connection substructure and the terminal seat to form a loop, so that the input and output currents of the transmission battery are realized.
When the vent hole row is deformed, the stress structure moves along the round hole and drives the lever structure to move with the connected end of the lever structure, so that the connection sub-structure is disconnected with the terminal seat, the stress structure is contacted with the connection sub-structure, and the input and output currents of the battery are disconnected.
Specifically, after the abnormality occurs in the battery and gas is generated, the exhaust hole row deforms and protrudes upwards, and acting force is applied to the stress structure along the direction of the round hole, so that the stress structure moves along the round hole; the stress structure is linked with the lever structure, and when the stress structure moves along the round hole, the lever structure is driven to move with the limit structure at the connected end, so that the limit structure releases the acting force born by the power-off structure in the power supply state, the power-off is displaced by taking the end movably connected with the terminal board as the center of a circle under the elastic action of the strip-shaped concave structure, the connection sub-structure is disconnected with the terminal seat, and the input and output currents of the battery are disconnected.
Preferably, the device further comprises a limiting structure, and the limiting structure is connected with the inner side surface of the shell through an elastic device. In practical applications, the elastic means may be a spring.
Preferably, the method comprises the steps of,
The stress structure is cylindrical, and the lower surface of the stress structure is an inclined plane. The shape of the stress structure corresponds to the shape of the hole-shaped position where the vent hole is located, and the specific shape is not limited in the embodiment of the present invention.
Preferably, the method comprises the steps of,
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is connected with the upper surface of the stress structure, and the other end of the lever structure is connected with the limiting structure;
When the exhaust hole row deforms, one end connected with the upper surface of the stress structure moves along with the movement of the stress structure, the position of the limiting structure changes, and the state of the power-off structure is controlled to be the power-off state.
The lever structure is connected with the stress structure and the power-off structure, the stress structure moves, and the state of the power-off structure is changed through the lever structure.
Preferably, the method comprises the steps of,
The upper surface of the stress structure comprises a cylindrical protruding structure, which corresponds to the connection sub-structure.
Preferably, the stress structure further comprises:
the upper surface of the stress structure comprises a strip-shaped protruding structure, and the strip-shaped protruding structure corresponds to the connecting sub-structure.
Preferably, the method comprises the steps of,
The connection substructure included in the power-off structure is a circular concave structure. The round concave structure is made of conductive materials.
Preferably, the method comprises the steps of,
The top end of the limiting structure comprises a protruding part;
The power-off structure is in a power supply state, and the protruding part is positioned on the other end opposite to one end of the power-off structure, which is movably connected with the terminal board; the power-off structure is in a power supply state, the protruding part clamps the other end opposite to one end of the power-off structure, which is movably connected with the terminal board, to provide downward pressure, and the elasticity provided by the strip-shaped concave structure is overcome, so that the round concave structure is more stable in contact with the terminal base, and current transmission is facilitated.
The power-off structure is in a power-off state, and the protruding part is positioned at the other end, opposite to the movable connection end of the power-off structure and the terminal board, of the power-off structure and is disconnected; or alternatively
The top end of the limiting structure comprises a hollow part, the other end of the limiting structure opposite to the end, which is movably connected with the terminal board, of the power-off structure comprises a protruding part, and the protruding part corresponds to the hollow part in size;
The power-off structure is in a power supply state, and the convex part is buckled on the hollow part; the power-off structure is in a power supply state, the convex part is buckled on the hollow part, and the elasticity provided by the strip-shaped concave structure is overcome, so that the round concave structure is more stable in contact with the terminal seat, and the transmission of current is facilitated.
The power-off structure is in a power-off state, and the convex part is disconnected with the hollow part.
Optionally, the method further comprises:
the inner diameter of the strip-shaped concave structure is smaller than that of the round concave structure;
when the exhaust hole row is not deformed, the strip-shaped concave structure is contacted with the terminal seat to transmit the input and output currents of the battery;
When the vent hole row is deformed, the stress structure moves along the round hole and drives the lever structure to move with the connected end of the lever structure, and under the elastic action of the round concave structure, the strip-shaped concave structure is disconnected with the terminal seat to disconnect the input and output current of the battery;
The upper surface of the stress structure includes a cylindrical protrusion structure. In practical applications, the strip-shaped concave structure may be made of conductive material.
Optionally, the method further comprises:
the two wing parts of the power-off structure respectively comprise a strip-shaped concave structure, and the middle part of the power-off structure is flat;
when the exhaust hole row is not deformed, the strip-shaped concave structure is contacted with the terminal seat to transmit the input and output currents of the battery;
when the vent hole row is deformed, the stress structure moves along the round hole and drives the lever structure to move with the connected end of the lever structure, and under the elastic action of the strip-shaped concave structure, the strip-shaped concave structure is disconnected from the terminal seat, so that the input and output currents of the battery are disconnected;
the upper surface of the stress structure includes a bar-shaped protrusion structure. In practical applications, the strip-shaped concave structure may be made of conductive material.
Optionally, the method further comprises:
the two wing parts of the power-off structure are flat, and the middle part of the power-off structure comprises a round concave structure;
When the vent hole row is not deformed, the circular concave structure is contacted with the terminal seat to transmit the input and output currents of the battery;
when the vent hole row is deformed, the stress structure moves along the round hole and drives one end of the lever structure connected with the lever structure to move, and under the action of the round concave structure, the round concave structure is disconnected from the terminal seat, so that the input and output currents of the battery are disconnected;
The upper surface of the stress structure includes a cylindrical protrusion structure. In practical applications, the strip-shaped concave structure may be made of conductive material.
Preferably, in practical application, in order to increase stability and durability of the device, the portion contacting the terminal seat is made of conductive material, the portion providing the elastic force is made of non-conductive material, and the rest is made of other materials.
Optionally, for convenience in deformation, the thickness of the exhaust hole may be 0.05-0.3 mm, and the embodiment of the present invention is not limited to a specific thickness.
The embodiment of the invention provides an automatic cutting device for battery current, which triggers cutting of current through deformation of an exhaust hole, never realizes automatic cutting of current when the battery is abnormal, and can prevent safety problems caused by the battery abnormality more timely and has higher reliability compared with manual control of current cutting. In addition, the automatic current cutting device is arranged outside the battery, so that the drift of the internal resistance of the battery is avoided, and the battery is easy to open in the vibration process, so that the effective safety protection is achieved. In addition, because the automatic current cutting device is arranged outside the battery, dangerous accidents such as explosion caused by contact with internal chemical solution when the battery is abnormal are avoided, the possibility of explosion of the battery is reduced, and the safety is improved.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.
It should be noted that: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. An automatic battery current cutoff device, the device comprising:
a power-off structure, a stress structure and a lever structure;
one end of the power-off structure is connected with the terminal board through an elastic part, and the elastic part has conductivity; the power-off structure comprises a connector sub-structure;
The middle part of the power-off structure comprises a round concave structure;
the stress structure is connected with the lever structure; the bottom surface of the stress structure is in contact with the exhaust hole; the part of the bottom surface of the power-off structure, which is contacted with the stress structure, at least comprises an elastic structure; the outer diameter of the stress structure is smaller than the inner diameter of a round hole where the exhaust hole is located; the elastic structure at least comprises an elastic sheet;
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is positioned in a groove on the upper surface of the stress structure, and the other end of the lever structure is in contact with the limiting structure;
When the exhaust hole row is not deformed, the power-off structure is in contact with the terminal seat, and the input and output currents of the battery are transmitted;
When the vent hole row is deformed, the stress structure moves along the round hole and drives one end of the lever structure connected with the lever structure to move, and under the action of the elastic structure and the limiting structure, the round concave structure of the power-off structure is disconnected with the terminal seat to disconnect the input and output current of the battery;
the device also comprises a limiting structure, wherein the limiting structure is connected with the inner side surface of the shell through an elastic device;
The stress structure is cylindrical, and the lower surface of the stress structure is an inclined plane.
2. The apparatus of claim 1, wherein the device comprises a plurality of sensors,
The fulcrum of the lever structure is positioned on the inner bottom surface of the shell, one end of the lever structure is connected with the upper surface of the stress structure, and the other end of the lever structure is connected with the limiting structure;
When the exhaust hole row deforms, one end connected with the upper surface of the stress structure moves along with the movement of the stress structure, the position of the limiting structure changes, and the state of the power-off structure is controlled to be a power-off state;
The lever structure is connected with the stress structure and the power-off structure, the stress structure moves, and the state of the power-off structure is changed through the lever structure.
3. The apparatus of claim 2, wherein the device comprises a plurality of sensors,
The upper surface of the stress structure comprises a cylindrical protruding structure, and the cylindrical protruding structure corresponds to the connecting sub-structure.
4. The device of claim 2, wherein the upper surface of the stress structure comprises a bar-shaped protrusion structure corresponding to the connector sub-structure.
5. The apparatus of claim 2, wherein the device comprises a plurality of sensors,
The connection substructure included in the power-off structure is a circular concave structure.
6. The apparatus of claim 1, wherein the device comprises a plurality of sensors,
The top end of the limiting structure comprises a protruding part;
The power-off structure is in a power supply state, and the protruding part is positioned on the other end opposite to one end, which is movably connected with the terminal board, of the power-off structure;
The power-off structure is in a power-off state, and the protruding part is positioned at the other end, opposite to the movable connection end of the power-off structure and the terminal board, of the power-off structure and is disconnected; or alternatively
The top end of the limiting structure comprises a hollow part, the other end of the limiting structure opposite to the end, which is movably connected with the terminal board, of the power-off structure comprises a protruding part, and the protruding part corresponds to the hollow part in size;
The power-off structure is in a power supply state, and the protruding part is buckled on the hollow part;
The power-off structure is in a power-off state, and the protruding portion is disconnected from the hollow portion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810374376.7A CN108550775B (en) | 2018-04-24 | 2018-04-24 | Automatic cut-off device for battery current |
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| CN209016180U (en) * | 2018-04-24 | 2019-06-21 | 苏州聚天合金属科技有限公司 | A kind of battery current automatic disconnecting device |
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| BE436328A (en) * | 1938-09-08 | |||
| US3337824A (en) * | 1963-12-09 | 1967-08-22 | Albert B Rypinski | Circuit breaker having dashpot type electro-magnetic core and simplified actuating linkage |
| JPH06338305A (en) * | 1993-05-28 | 1994-12-06 | Matsushita Electric Ind Co Ltd | Explosion-proof sealing plate for thin non-aqueous electrolyte batteries |
| JPH08185849A (en) * | 1994-12-27 | 1996-07-16 | Fuji Elelctrochem Co Ltd | Electrochemical element with explosion-proof safety device |
| JPH0917416A (en) * | 1995-06-30 | 1997-01-17 | Fuji Elelctrochem Co Ltd | Battery with explosion-proof function |
| CA2262962C (en) * | 1998-05-29 | 2003-04-29 | Myung Soon Bae | Automatic power cut-off device for emergency situations |
| KR200269123Y1 (en) * | 2001-12-27 | 2002-03-18 | 정귀식 | Battery having abmormality current cut off device |
| KR101219955B1 (en) * | 2010-11-30 | 2013-01-08 | 기아자동차주식회사 | Service Plug for High Voltage Battery |
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| CN209016180U (en) * | 2018-04-24 | 2019-06-21 | 苏州聚天合金属科技有限公司 | A kind of battery current automatic disconnecting device |
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