CN210926207U - Structure for cutting off short-circuit voltage and battery top cover - Google Patents
Structure for cutting off short-circuit voltage and battery top cover Download PDFInfo
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- CN210926207U CN210926207U CN201921788028.0U CN201921788028U CN210926207U CN 210926207 U CN210926207 U CN 210926207U CN 201921788028 U CN201921788028 U CN 201921788028U CN 210926207 U CN210926207 U CN 210926207U
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of the battery production is made, concretely relates to a structure for cutting off short-circuit voltage, run through including insulating substrate (1) and at least one electrically conductive hole (2) of insulating substrate (1), the top and/or the bottom of electrically conductive hole (2) are provided with electrically conductive overburden (3), electrically conductive overburden (3) are used for connecting the utmost point post or top plate piece (5) of battery, electrically conductive overburden (3) end connection has one-way conductive element (4), one-way conductive element (4) are used for cutting off short-circuit voltage. The utility model discloses can end by the voltage that forms in the short circuit of outside part, improve the security performance of electric core to improve the quality of battery.
Description
Technical Field
The utility model belongs to the technical field of the battery production is made, concretely relates to a structure and battery top cap for ending short-circuit voltage.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. Nowadays, with the development of modern society and the enhancement of environmental awareness of people, more and more devices select lithium batteries as power supplies, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, which provides a wide space for the application and development of the lithium batteries. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries.
The assembly structure of the resistance block is arranged between the top cover and the pole column and is widely used in the design of the top cover of the power battery all the time, under the normal condition, the anode pole column is electrically connected with the top cover plate through the resistance block, and the resistance value of the resistance block is in the milliohm level, so that the electric potentials of the aluminum shell and the anode pole column are ensured, and large current is not generated. However, the utility model discloses a discovery that this solution has at least the following disadvantages: because the positive pole is electrically connected with the top cover plate through the resistance block, when an external part and the shell cause short circuit, if the current between the poles is not cut off in time, the safety performance of the battery cell can be reduced, and even the battery cell is scrapped.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: aiming at the defects of the prior art, the structure for cutting off the short-circuit voltage is provided, the voltage formed by the short circuit of external parts can be cut off, the safety performance of the battery cell is improved, and the quality of the battery is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a structure for cutting off short-circuit voltage comprises an insulating substrate and at least one conductive hole penetrating through the insulating substrate, wherein a conductive covering layer is arranged at the top and/or the bottom of the conductive hole and used for being connected with a pole column or a top cover plate of a battery, and the end part of the conductive covering layer is connected with a one-way conduction element used for cutting off the short-circuit voltage.
As an improvement of the structure for cutting off the short-circuit voltage according to the present invention, the unidirectional conductive element is connected in series and/or in parallel with a plurality of current limiting resistors.
As an improvement of the structure for cutting off the short-circuit voltage according to the present invention, the one-way conduction element is connected in parallel to the conductive coating layer; or the one-way conduction element is connected in series between the conductive covering layer and the conductive hole.
As an improvement of the structure for cutting off the short-circuit voltage of the present invention, the reverse cut-off current of the unidirectional conducting element is 0.1mA to 5000A.
As an improvement to the structure for cutting off short-circuit voltage, the unidirectional conducting element is a diode or a unidirectional conducting power supply chip.
As an improvement of the structure for cutting off the short-circuit voltage according to the present invention, the conductive hole includes a hole body and a conductive body disposed on the hole body; the conductor is accommodated in the hole body, or the conductor is arranged on the inner wall of the hole body.
As an improvement to the structure for blocking short-circuit voltage according to the present invention, the electrical conductor and the electrically conductive coating layer are made of a metallic material.
As an improvement of a structure for cutting off short-circuit voltage, the width of electrically conductive overburden is 0.2mm ~ 40mm, electrically conductive overburden's thickness is 0.2 ~ 4.0 mm.
As an improvement of a structure for cutting off short-circuit voltage, insulating substrate includes the circuit board and sets up the utmost point post through-hole of circuit board, electrically conductive overburden centers on utmost point post through-hole sets up.
A second object of the utility model is to provide a top cap, include top cap piece, insulating plastic, welding ring, anodal post and as above-mentioned be used for the structure by short-circuit voltage, anodal post with the cover is established between the top cap piece be used for the structure by short-circuit voltage, welding ring weld in anodal post, insulating plastic rubber coating in the anodal post, the bottom of top cap piece is provided with down the plastic, the top cap piece with be provided with explosion-proof valve down between the plastic, the top of explosion-proof valve is provided with the protection film, anodal post with the cover is equipped with the sealing washer between the top cap piece.
The beneficial effects of the utility model reside in that, the utility model discloses an run through including insulating substrate and at least one insulating substrate's electrically conductive hole, the top and/or the bottom in electrically conductive hole are provided with electrically conductive overburden, electrically conductive overburden is used for connecting the utmost point post or the top cap piece of battery, electrically conductive overburden end connection has the one-way component that switches on, the one-way component that switches on is used for ending short-circuit voltage. Because in the existing design, the positive pole is electrically connected with the top cover plate through the resistance block, the resistance value of the resistance block is in milliohm level, thereby ensuring the electric potential of the aluminum shell and the positive pole, when the external part and the shell cause short circuit, if the current between the poles is not cut off in time, the safety performance of the electric core is reduced, even scrapped, therefore, the top and/or the bottom of the conductive hole is provided with the conductive covering layer, the pole or the top cover plate of the battery is connected through the conductive covering layer, thereby realizing the electric connection of the positive pole, the insulating substrate and the top cover plate, meanwhile, the end part of the conductive hole is connected with the one-way conduction element, when in normal work, the one-way conduction direction of the one-way conduction element is the same as the current direction of the positive pole to the top cover plate, the one-way conduction element is conducted, the positive pole provides voltage to the top cover plate, thereby improving the safety performance of the battery core; when the output end is short-circuited by an external part, the generated current is cut off by the unidirectional conduction element along the directions of the top cover plate, the insulating substrate and the positive post, the voltage cannot pass through the positive post, and the unidirectional conduction element plays a role in protecting the battery cell, so that the performance of the battery cell is improved, the number of the conductive holes is two, but the number of the conductive holes can also be adjusted according to the actual overcurrent requirement. The utility model discloses can end by the voltage that forms in the short circuit of outside part, improve the security performance of electric core to improve the quality of battery.
Drawings
Fig. 1 is a schematic structural diagram of the top surface of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a bottom surface of embodiment 1 of the present invention.
Fig. 3 is a schematic cross-sectional view of embodiment 1 of the present invention.
Fig. 4 is a schematic equivalent circuit diagram of embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of the top surface of embodiment 2 of the present invention.
Fig. 6 is an exploded view of embodiment 3 of the present invention.
Wherein: 1-an insulating substrate; 2-a conductive via; 3-a conductive coating; 4-a one-way conducting element; 11-a circuit board; 12-pole through hole; 21-a well body; 22-an electrical conductor; 41-current limiting resistor; 5-top cover sheet; 6-insulating plastic; 7-a solder ring; 8-positive pole column; 9-discharging plastic; 10-an explosion-proof valve; 20-protective film; 30-sealing ring.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.
Example 1
As shown in fig. 1 to 4, a structure for cutting off a short-circuit voltage includes an insulating substrate 1 and at least one conductive hole 2 penetrating through the insulating substrate 1, conductive covering layers 3 are disposed at the top and bottom of the conductive hole 2, the conductive covering layers 3 are used for connecting a pole or a top cover 5 of a battery, an end of the conductive covering layer 3 is connected with a one-way conduction element 4, and the one-way conduction element 4 is used for cutting off the short-circuit voltage. Because in the existing design, the positive pole is electrically connected with the top cover through the resistance block, the resistance value of the resistance block is in milliohm level, thereby ensuring the electric potential of the aluminum shell and the positive pole 8, but when the external part and the shell cause short circuit, if the current between the poles is not cut off in time, the safety performance of the electric core is reduced, even scrapped, therefore, the top and/or the bottom of the conductive hole 2 is provided with the conductive covering layer 3, the pole of the battery or the top cover plate 5 is connected through the conductive covering layer 3, the electric connection of the positive pole 8, the insulating substrate 1 and the top cover plate 5 is realized, meanwhile, the end part of the conductive covering layer 3 is connected with the one-way conduction element 4, when in normal work, the one-way conduction direction of the one-way conduction element 4 is the same as the current direction of the positive pole 8 to the top cover plate 5, the positive pole 8 provides voltage to the top, the shell is always provided with positive voltage, so that the shell cannot be corroded, and the safety performance of the battery cell is improved; when the output is by the external part short circuit, the direction of top cap piece 5, insulating substrate 1 and anodal post 8 is followed to the electric current that produces, and the electric current is stopped to single guide element 4, and voltage can not cross anodal post 8, and one-way guide element 4 plays the effect of protection electric core to improve the performance of electric core, in this embodiment, the quantity of electrically conductive hole 2 is two, nevertheless the utility model discloses do not use this as the limit, the quantity of electrically conductive hole 2 can be adjusted according to the actual needs that overflow.
Preferably, the unidirectional conducting element 4 is a diode. When the battery normally works, the unidirectional conduction direction of the diode is the same as the current direction from the positive pole 8 to the top cover plate 5, namely, forward voltage is applied to the anode and the cathode of the diode, the diode is conducted, the positive pole 8 provides voltage to the top cover plate 5, and the top cover plate 5 provides voltage to the shell, so that the shell always has positive voltage, the shell cannot be corroded, and the safety performance of the battery cell is improved; when the output end is short-circuited by an external part, the generated current is cut off by the diode along the directions of the top cover plate 5, the insulating substrate 1 and the positive pole column 8, namely, when reverse voltage is applied to the anode and the cathode, the voltage cannot pass through the positive pole column 8, and the diode plays a role in protecting the battery cell, so that the performance of the battery cell is improved.
Preferably, the unidirectional conducting element 4 is connected with a plurality of current limiting resistors 41 in series and/or in parallel. The current limiting resistor 41 is a resistor connected in series in the circuit to limit the magnitude of the current of the branch, and also has a voltage dividing effect to prevent the unidirectional conducting element 4 from being broken down by high voltage, and meanwhile, the current limiting resistor 41 can be connected in parallel with the unidirectional conducting element 4 to prevent the series-connected components from being burnt out by excessive current.
Preferably, the unidirectional conducting element 4 is connected in parallel with the conductive coating 3. The both ends of one-way conduction element 4 are parallelly connected with the both ends of conductive coating 3, wherein, conductive coating 3 passes through conductive hole 2 and connects welding ring 7 and the top plate 5 of battery, when one-way conduction element 4 positive pole and negative pole add forward voltage, one-way conduction element 4 switches on, positive post 8 is connected with top plate 5 electricity through one-way conduction element 4, and during the trouble, the direction of electric current is opposite, namely, when adding reverse voltage for positive pole and negative pole, one-way conduction element 4 ends, top plate 5 can not be connected with positive post 8 electricity through one-way conduction element 4, that is, short-circuit voltage can't transmit positive post 8, one-way conduction element 4 plays the effect of protection electric core, thereby improve the performance of electric core.
Preferably, the reverse off current of the unidirectional conductive element 4 is 0.1mA to 5000A. Because the shell can produce current when external parts and metal are short-circuited, the magnitude of the reverse cut-off current of the one-way conduction element 4 is limited, the phenomenon that the reverse cut-off current of the one-way conduction element 4 is too large, the cost of the one-way conduction element 4 is increased, and the reduction of the production cost of the top cover is not facilitated.
Preferably, the conductive via 2 includes a via body 21 and a conductor 22 provided in the via body 21; the conductor 22 is accommodated in the hole body 21, or the conductor 22 is provided on the inner wall of the hole body 21. When the diameter of hole body 21 is less, can hold electric conductor 22 in hole body 21, when the diameter of hole body 21 is great, can directly plate electric conductor 22 on the inner wall of hole body 21, in this embodiment, electric conductor 22 is electrically conductive graphite, electrically conductive carbon fiber, electrically conductive carbon powder, electrically conductive pottery or metal, but the utility model discloses do not use this as the limit, electric conductor 22 still can be for electrically conductive graphite, electrically conductive carbon fiber, electrically conductive carbon powder, electrically conductive pottery, metal one or more, and electric conductor 22 still can adopt other materials, as long as guarantee that electric conductor 22 can electrically conduct can.
Preferably, the conductor 22 and the conductive cover layer 3 are both made of a metal material. In this embodiment, the electric conductor 22 and the conductive coating 3 are metal materials, but the utility model discloses not so limiting, the electric conductor 22 and the conductive coating 3 adopt the same conductive material can, can reduce the resistance between electric conductor 22 and the conductive coating 3, reduce the calorific capacity of electric conductor 22 or conductive coating 3, improve the security performance of electric core.
Preferably, the width of the conductive coating 3 is 0.2mm to 40mm, and the thickness of the conductive coating 3 is 0.2mm to 4.0 mm. The width of the conductive covering layer 3 is limited, the conductive covering layer 3 is prevented from being too wide, the overall production cost of the conductive covering layer 3 is increased, and meanwhile, the conductive covering layer 3 is prevented from being too narrow, so that the contact performance of the conductive covering layer 3 and the positive pole 8 or the top cover is influenced; the thickness of the conductive coating 3 is limited, the conductive coating 3 is prevented from being too thick, the overall production cost of the conductive coating 3 is increased, and meanwhile, the conductive coating 3 is prevented from being too thin, so that the conductive coating 3 is fused under high current, and the maintenance and use cost of the structure is increased.
Preferably, the insulating substrate 1 includes a circuit board 11 and a post through hole 12 disposed on the circuit board 11, and the conductive coating layer 3 is disposed around the post through hole 12. The pole through hole 12 is added, so that the positive pole 8 can be conveniently installed on the top cover through the pole through hole 12; the conductive coating 3 is arranged around the pole through hole 12, the top surface and the bottom surface space of the insulating substrate 1 are effectively utilized, the contact area of the conductor 22 and the positive pole 8 and the top cover is improved, the condition of poor contact of the battery is prevented, the normal use of the battery is influenced, wherein the insulating substrate 1 is manufactured by adopting a printed circuit board process, the main advantage of the circuit board 11 is the error of greatly reduced wiring and assembly, the automation level is improved, and meanwhile, the conductive coating has the advantages of small volume, light weight and benefit to the miniaturization of the battery.
Preferably, the circuit board 11 is a glass fiber cloth substrate, a glass fiber composite substrate, a paper-based copper-clad plate or a metal-based copper-clad plate. The common circuit board 11 material of the glass fiber cloth substrate, the glass fiber composite substrate, the paper-based copper-clad plate or the metal-based copper-clad plate can be selected as the circuit board 11 according to the actual cost requirement, wherein the glass fiber composite substrate can also be a composite substrate of glass fiber and paper.
The utility model discloses a theory of operation is:
because in the existing design, the positive pole is electrically connected with the top cover through the resistance block, the resistance value of the resistance block is in milliohm level, thereby ensuring the electric potential of the aluminum shell and the positive pole 8, but when the external part and the shell cause short circuit, if the current between the poles is not cut off in time, the safety performance of the battery core is reduced, even scrapped, therefore, the top and/or the bottom of the conductive hole 2 is provided with the conductive covering layer 3, the pole or the top cover plate 5 of the battery is connected through the conductive covering layer 3, thereby realizing the electric connection of the positive pole 8, the insulating substrate 1 and the top cover plate 5, meanwhile, the end part of the conductive covering layer 3 is connected with the one-way conducting element 4, because the diode is an electronic device made of semiconductor material, the diode has one-way conducting performance, namely when the positive voltage and the negative voltage of the diode are applied, the diode is conducted, the diode is cut off; when the battery works normally, the one-way conduction direction of the one-way conduction element 4 is the same as the current direction from the positive pole 8 to the top cover plate 5, the one-way conduction element 4 is conducted, the positive pole 8 provides voltage to the top cover plate 5, and the top cover plate 5 provides voltage to the shell, so that the shell always has positive voltage, the shell cannot be corroded, and the safety performance of the battery cell is improved; when the output is by the short circuit of external part, the direction of top cap piece 5, insulating substrate 1 and positive post 8 is followed to the electric current that produces, and the electric current is cut off to single guide element 4, and voltage can not cross positive post 8, and one-way guide element 4 plays the effect of protection electric core to improve the performance of electric core, the quantity of electrically conductive hole 2 is two, but the quantity of electrically conductive hole 2 can be adjusted according to actual overcurrent needs.
Example 2
As shown in fig. 5, unlike embodiment 1: the one-way conduction element 4 of this embodiment is a one-way conduction power chip, the top or the bottom of the conductive hole 2 is provided with the conductive coating layer 3, and the one-way conduction element 4 is connected in series between the conductive coating layer 3 and the conductive hole 2. The conduction element 4 is a one-way conduction power supply chip, can adjust reverse cut-off current, improves the application range of the conduction element 4, improves the utilization rate of the conduction element 4, and is beneficial to reducing the production cost of the battery; the top or the bottom of the conductive hole 2 is provided with a conductive covering layer 3, the conductive covering layer 3 is connected with the conductive hole 2 through a one-way conduction element 4, wherein the conductive covering layer 3 at one end of the conductive hole 2 is connected with a top cover plate 5 or an anode post 8, the other end of the conductive hole 2 is correspondingly connected with the anode post 8 or the top cover plate 5, the one-way conduction element 4 is connected in series and is equivalent to be connected in series between the anode post 8 or the top cover plate 5, the one-way conduction of the one-way conduction element 4 is realized, the current direction is the same as that from the anode post 8 to the top cover plate 5, namely, forward voltages are added to a first pin and a fourth pin of a one-way conduction power supply chip, the one-way conduction element 4 is conducted; when the output end is short-circuited by an external part, the generated current is along the directions of the top cover plate 5, the insulating base plate 1 and the positive pole column 8, namely, when reverse voltage is applied to the first pin and the fourth pin of the unidirectional conducting power supply chip, the current is cut off by the unidirectional conducting element 4, and the voltage cannot reach the positive pole column 8.
The other structures are the same as those of embodiment 1, and are not described again here.
Example 3
As shown in fig. 6, a top cap, including top cap piece 5, insulating plastic 6, welding ring 7, anodal post 8 and as embodiment 1 be used for ending the structure of short-circuit voltage, the cover is established between anodal post 8 and the top cap piece 5 and is used for ending the structure of short-circuit voltage, welding ring 7 welds in anodal post 8, insulating plastic 6 rubber coating in anodal post 8, the bottom of top cap piece 5 is provided with down plastic 9, be provided with explosion-proof valve 10 between top cap piece 5 and the lower plastic 9, the top of explosion-proof valve 10 is provided with protection film 20, the cover is equipped with sealing washer 30 between anodal post 8 and the top cap piece 5.
It should be noted that: the insulating plastic 6 is of an integral injection molding structure formed by polyphenylene sulfide (PPS), Polysulfone (PSU), Polytetrafluoroethylene (PFA), polybutylene terephthalate (PBT), Polyamide (PA), nano materials or polypropylene (PP), so that the integral rigidity of the insulating plastic 6 can be improved, the service life of the insulating plastic 6 can be prolonged, the production cost of the insulating plastic 6 is reduced, the production process is simple, and the safety performance of a battery cell can be improved; the insulating plastic 6 enables the positive pole 8 to be fastened on the top cover plate 5, potential safety hazards caused by loosening of the positive pole 8 are prevented, reliability of the top cover plate 5 is guaranteed, and meanwhile the effect of protecting the top cover plate 5 is achieved; the welding ring 7 is equivalent to a step formed on the positive pole 8 and used for fastening the tensile force of the insulating plastic 6 in the vertical direction to realize the insulation and the electric connection of the pole, thereby simplifying the production process and preventing the metal wire from being generated in the machining process of a machine to influence the safety performance of the battery cell; an insulating base plate 1 is arranged on a welding ring 7 and a top cover plate 5 of a battery, a positive pole 8 and the top cover plate 5 are electrically connected through a diode on the insulating base plate 1, when the battery works normally, the unidirectional conduction direction of the diode is the same as the current direction from the positive pole 8 to the top cover plate 5, namely, forward voltage is applied to the anode and the cathode of the diode, the diode is conducted, the positive pole 8 provides voltage for the top cover plate 5, the top cover plate 5 provides voltage for a shell, so that the shell always has positive voltage, the shell cannot be corroded, and the safety performance of a battery cell is improved; when the output end is short-circuited by an external part, the generated current is cut off by a diode along the directions of the top cover plate 5, the insulating substrate 1 and the positive pole column 8, namely, when reverse voltage is applied to the anode and the cathode, and the voltage cannot exceed the positive pole column 8, namely, the current between the positive pole column 8 and the top cover plate 5 is automatically cut off, so that the external part and the shell are prevented from forming large current, and the safety performance of the battery cell is improved; the lower plastic 9 can improve the insulating property between the top cover plate 5 and the battery core, and prevent the short circuit of the battery caused by the corrosion of the top cover plate 5 by the electrolyte; the explosion-proof valve 10 can automatically and rapidly release the pressure of the battery when the battery rises due to overcharge, overdischarge, overcurrent and short circuit inside the battery, so that safety accidents caused by explosion of the battery are avoided; the protective film 20 can prevent impurities from entering the explosion-proof valve 10, and ensure that the function of the explosion-proof valve 10 can be realized; sealing washer 30 is fluororubber, prevents that electrolyte from passing through gap corrosion insulating plastic 6, prevents that electrolyte from corroding top cap piece 5 and leading to the battery short circuit, also plays insulating top cap piece 5's effect to improve the insulating properties of top cap piece 5 and electric core.
Example 4
The utility model provides a top cap, includes top cap piece 5, insulating plastic 6, welding ring 7, anodal post 8 and as embodiment 2 be used for the structure of cut-off short-circuit voltage, the cover is established between anodal post 8 and the top cap piece 5 and is used for the structure of cut-off short-circuit voltage, welding ring 7 welds in anodal post 8, insulating plastic 6 rubber coating in anodal post 8, the bottom of top cap piece 5 is provided with down plastic 9, top cap piece 5 and be provided with explosion-proof valve 10 down between the plastic 9, the top of explosion-proof valve 10 is provided with protection film 20, the cover is equipped with sealing washer 30 between anodal post 8 and the top cap piece 5.
It should be noted that: the top or the bottom of electrically conductive hole 2 is provided with electrically conductive overburden 3, connect through one-way conductive element 4 between electrically conductive overburden 3 and the electrically conductive hole 2, wherein, top plate 5 or anodal post 8 are connected to the electrically conductive overburden 3 of electrically conductive hole 2 one end, anodal post 8 or top plate 5 are connected to the electrically conductive hole 2 other end correspondence, one-way conductive element 4 establishes ties and is equivalent to establishing ties between anodal post 8 or top plate 5, realize one-way conductive element 4 one-way conduction, cut off the voltage of making because of the short circuit of external part, improve the security performance of electric core.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A structure for cutting off a short-circuit voltage, characterized in that: the battery protection device comprises an insulating substrate (1) and at least one conductive hole (2) penetrating through the insulating substrate (1), wherein a conductive covering layer (3) is arranged at the top and/or the bottom of the conductive hole (2), the conductive covering layer (3) is used for being connected with a pole column or a top cover plate (5) of a battery, the end part of the conductive covering layer (3) is connected with a one-way conduction element (4), and the one-way conduction element (4) is used for cutting off short-circuit voltage.
2. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the unidirectional conducting element (4) is connected with a plurality of current limiting resistors (41) in series and/or in parallel.
3. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the one-way conducting element (4) is connected with the conductive covering layer (3) in parallel, or the one-way conducting element (4) is connected between the conductive covering layer (3) and the conductive hole (2) in series.
4. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the reverse cut-off current of the unidirectional conducting element (4) is 0.1 mA-5000A.
5. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the unidirectional conducting element (4) is a diode or a unidirectional conducting power supply chip.
6. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the conductive hole (2) comprises a hole body (21) and a conductor (22) arranged on the hole body (21); the electric conductor (22) is accommodated in the hole body (21), or the electric conductor (22) is arranged on the inner wall of the hole body (21).
7. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the width of the conductive covering layer (3) is 0.2-40 mm, and the thickness of the conductive covering layer (3) is 0.2-4.0 mm.
8. A structure for cutting off a short-circuit voltage according to claim 1, wherein: the insulating substrate (1) comprises a circuit board (11) and a pole through hole (12) formed in the circuit board (11), and the conductive covering layer (3) surrounds the pole through hole (12).
9. A structure for cutting off a short-circuit voltage according to claim 8, wherein: the circuit board (11) is a glass fiber cloth substrate, a glass fiber composite substrate, a paper-based copper-clad plate or a metal-based copper-clad plate.
10. The utility model provides a battery top cap, includes top cap piece (5), insulating plastic (6), welding ring (7), anodal post (8) and according to any one of claims 1 ~ 9 the structure for cutting off short-circuit voltage, anodal post (8) with the cover is established between top cap piece (5) the structure, welding ring (7) weld in anodal post (8), insulating plastic (6) rubber coating in anodal post (8), the bottom of top cap piece (5) is provided with down plastic (9), top cap piece (5) with be provided with explosion-proof valve (10) down between plastic (9), the top of explosion-proof valve (10) is provided with protection film (20), anodal post (8) with the cover is equipped with sealing washer (30) between top cap piece (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921788028.0U CN210926207U (en) | 2019-10-23 | 2019-10-23 | Structure for cutting off short-circuit voltage and battery top cover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921788028.0U CN210926207U (en) | 2019-10-23 | 2019-10-23 | Structure for cutting off short-circuit voltage and battery top cover |
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| CN210926207U true CN210926207U (en) | 2020-07-03 |
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| CN201921788028.0U Active CN210926207U (en) | 2019-10-23 | 2019-10-23 | Structure for cutting off short-circuit voltage and battery top cover |
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| CN (1) | CN210926207U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707384A (en) * | 2019-10-23 | 2020-01-17 | 江苏塔菲尔新能源科技股份有限公司 | Structure for cutting off short-circuit voltage and battery top cover |
| JP7487420B2 (en) | 2021-01-13 | 2024-05-20 | 恵州億緯▲リ▼能股▲フン▼有限公司 | battery |
-
2019
- 2019-10-23 CN CN201921788028.0U patent/CN210926207U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707384A (en) * | 2019-10-23 | 2020-01-17 | 江苏塔菲尔新能源科技股份有限公司 | Structure for cutting off short-circuit voltage and battery top cover |
| JP7487420B2 (en) | 2021-01-13 | 2024-05-20 | 恵州億緯▲リ▼能股▲フン▼有限公司 | battery |
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Effective date of registration: 20220124 Address after: 215500 room 808, No. 1, Southeast Avenue, Changshu high tech Industrial Development Zone, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 211100 Lantian Road 249, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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