CN111180652A - Button cell and electronic product - Google Patents
Button cell and electronic product Download PDFInfo
- Publication number
- CN111180652A CN111180652A CN202010113104.9A CN202010113104A CN111180652A CN 111180652 A CN111180652 A CN 111180652A CN 202010113104 A CN202010113104 A CN 202010113104A CN 111180652 A CN111180652 A CN 111180652A
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- button cell
- conductor layer
- temperature
- blocking member
- bottom cover
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- 230000000903 blocking effect Effects 0.000 claims abstract description 69
- 239000004020 conductor Substances 0.000 claims description 76
- 229920000642 polymer Polymers 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 229910002804 graphite Inorganic materials 0.000 claims description 24
- 239000010439 graphite Substances 0.000 claims description 24
- 230000008859 change Effects 0.000 claims description 10
- 229920001940 conductive polymer Polymers 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
-
- 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
- H01M50/531—Electrode connections inside a battery casing
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a button cell and an electronic product, wherein the button cell comprises a cell and an external conduction assembly enclosed outside the cell, the cell is provided with a first tab and a second tab, and the first tab and the second tab are respectively electrically connected with the external conduction assembly; and part of the external conduction assembly is formed into a blocking piece, and the blocking piece is used for changing the internal conduction state of the button cell according to the temperature of the button cell so as to prevent unsafe accidents.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a button cell and an electronic product.
Background
Button cells are currently widely used in various areas of daily life, for example: the wearable product field, the electronic product field, the medical product field and the like.
Because the temperature of the button cell is too high due to some abnormal conditions in the using process of the button cell, and potential safety hazards are brought, designers pay more and more attention to the safety performance of the button cell while paying attention to the electrical performance of the button cell.
Disclosure of Invention
The invention provides a button cell and an electronic product, wherein the button cell can disconnect the internal electric connection when the temperature is too high so as to prevent unsafe accidents.
In a first aspect, the invention provides a button cell, which includes a cell and an external conductive component enclosed outside the cell, where the cell has a first tab and a second tab, and the first tab and the second tab are electrically connected to the external conductive component respectively;
part of the outer conductive component is formed as a blocking member for changing the internal conduction state of the button cell depending on the temperature of the button cell.
The button cell comprises a cell and an external conduction assembly arranged outside the cell in a surrounding manner, wherein a first tab and a second tab are arranged on the cell and are respectively electrically connected with the external conduction assembly, so that electric energy generated on the cell can be output outwards through the external conduction assembly; meanwhile, the blocking piece is arranged and used for changing the internal conduction state of the button cell according to the temperature of the button cell, so that the internal electric connection of the button cell can be disconnected when the temperature of the button cell is too high, and unsafe accidents are prevented; in addition, by forming part of the outer conducting component as the blocking piece, the blocking piece and a connecting circuit of the blocking piece do not need to be additionally arranged, so that the internal space of the button cell is saved, and the structure and the connecting mode of the button cell are simplified.
The button cell as described above, optionally, the blocking member comprises a first conductor layer, a conductive polymer connecting layer and a second conductor layer connected in sequence along the electrical conduction path of the button cell;
the polymer connecting layer is used for enabling the first conductor layer and the second conductor layer to be electrically disconnected when the temperature of the button cell is higher than or equal to a preset temperature, or enabling the first conductor layer and the second conductor layer to be electrically connected when the temperature of the button cell is lower than the preset temperature.
In the button cell as described above, optionally, the polymer connecting layer includes conductive graphite and an insulating polymer, and the conductive graphite and the insulating polymer are juxtaposed on an electrically conductive path of the button cell;
one end of the conductive graphite is electrically connected with the first conductor layer, and the other end of the conductive graphite is electrically connected with the second conductor layer;
the volume of the insulating polymer can be changed along with the temperature change of the button cell so as to change the connection state between the conductive graphite and the first conductor layer and the second conductor layer.
In the button cell battery, optionally, the outer conductive assembly includes a casing with an opening at one end and a bottom cover covering the opening of the casing, and a joint of the casing and the bottom cover is insulated;
the battery cell is located in a cavity enclosed by the shell and the bottom cover, the first pole lug is electrically connected with the shell, and the second pole lug is electrically connected with the bottom cover.
In the button cell battery as described above, optionally, at least a portion of the bottom cover is formed as the blocking member, and the second tab is electrically connected to the blocking member.
In the button cell battery as described above, optionally, the entire bottom cover is formed as the blocking member.
In the button cell battery as described above, optionally, at least a portion of the housing is formed as the blocking member, and the first tab is electrically connected to the blocking member.
In the button cell battery as described above, optionally, the entire case is formed as the blocking member.
The button cell battery as described above, optionally, further comprises an insulating member, and the joint of the casing and the bottom cover is insulated by the insulating member.
In a second aspect, the invention provides an electronic product comprising the button cell battery as defined in any one of the above.
The electronic product comprises a button cell, wherein the button cell comprises a cell and an external conduction assembly arranged outside the cell in a surrounding manner, and the electric energy generated on the cell can be output outwards through the external conduction assembly by arranging a first tab and a second tab on the cell and respectively electrically connecting the first tab and the second tab with the external conduction assembly; meanwhile, the blocking piece is arranged and used for changing the internal conduction state of the button cell according to the temperature of the button cell, so that the internal electric connection of the button cell can be disconnected when the temperature of the button cell is too high, and unsafe accidents are prevented; in addition, by forming part of the outer conducting component as the blocking piece, the blocking piece and a connecting circuit of the blocking piece do not need to be additionally arranged, so that the internal space of the button cell is saved, and the structure and the connecting mode of the button cell are simplified.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an exploded view of a button cell battery according to an embodiment of the present invention;
fig. 2 is a top view of a button cell provided in an embodiment of the invention;
fig. 3 is a front view of a button cell battery according to an embodiment of the present invention;
fig. 4 is a first schematic structural diagram of a protection structure of a button cell according to an embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a protection structure of a button cell according to an embodiment of the present invention;
fig. 6 is a cross-sectional view of a button cell provided in an embodiment of the invention;
fig. 7 is an enlarged view at a in fig. 6.
Description of reference numerals:
1-electric core;
2-an external conducting component;
21-a housing;
22-a bottom cover;
221-an insulating rubber ring;
3-a blocking member;
31-a first conductor layer;
32-a second conductor layer;
33-a polymer tie layer;
331-conductive graphite;
332-insulating polymer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the development of science and technology, electronic products are more and more introduced into the aspects of people's life, and button cells are also widely applied to electronic products in various fields, for example: computer motherboard, electronic watch, electronic dictionary, electronic scale, remote controller, electric toy, cardiac pacemaker, electronic hearing aid, counter, camera, etc.
The temperature of the button cell can be too high due to some abnormal conditions in the using process of the button cell, for example, the current is increased due to the internal short circuit of the button cell, and the temperature is increased; for another example, the temperature of the button cell battery is increased due to overcharge, and these abnormal conditions may cause unsafe accidents such as explosion and leakage of the button cell battery, thereby threatening the safety of life and property of people.
In order to solve the above technical problems, the present invention provides a button cell, in which a blocking member capable of changing an internal conduction state of the button cell according to a temperature change of the button cell is disposed, so that when the temperature of the button cell is too high, an internal electrical connection of the button cell can be disconnected to prevent an unsafe accident.
The button cell of the invention is described in detail below by means of specific examples:
example one
Fig. 1 is an exploded view of a button cell battery according to an embodiment of the present invention. Fig. 2 is a top view of a button cell according to an embodiment of the present invention. Fig. 3 is a front view of a button cell battery according to an embodiment of the invention. Fig. 4 is a first structural schematic diagram of a protection structure of a button cell provided in an embodiment of the present invention. Fig. 5 is a second schematic structural diagram of a protection structure of a button cell according to an embodiment of the present invention. Fig. 6 is a cross-sectional view of a button cell according to an embodiment of the present invention. Fig. 7 is an enlarged view at a in fig. 6. As shown in fig. 1 to 7, the present embodiment provides a button cell.
The button cell of this embodiment includes electric core 1 and encloses and establish at 1 outside outer conduction module 2 of electric core, be provided with first utmost point ear and second utmost point ear on electric core 1, first utmost point ear and second utmost point ear are connected with outer conduction module 2 electricity respectively, thereby can outwards transmit the electric energy that produces on electric core 1 for external consumer provides the electric energy through outer conduction module 2, or be rechargeable button cell when button cell, and when external charging equipment charges, the electric energy that charging equipment provided button cell can transmit to electric core 1 through outer conduction module 2.
Wherein, part of the external conduction component 2 is formed into a blocking piece 3, and the blocking piece 3 is used for changing the internal conduction state of the button cell according to the temperature of the button cell; for example, the blocking member 3 may be made of a positive temperature coefficient heat-sensitive material, which has a characteristic that the resistivity increases with the increase of temperature, i.e., when the temperature of the positive temperature coefficient heat-sensitive material increases beyond a certain value, the positive temperature coefficient heat-sensitive material can be converted from a good conductor to a bad conductor or even to an insulator, thereby having a switching characteristic; that is to say, when the temperature of the button cell provided with the blocking member 3 rises above a certain temperature value, the blocking member 3 can convert the conduction state inside the button cell into the non-conduction state, so that no current passes through the inside of the button cell, the temperature of the button cell gradually drops, and further unsafe accidents can be avoided.
In other embodiments, after the button cell turns the conduction state inside the button cell into the non-conduction state due to the over-high temperature, the blocking element may also have a function of restoring the non-conduction state inside the button cell into the conduction state as time goes by when the temperature of the button cell gradually decreases to a value lower than a certain temperature value, so as to not only avoid the occurrence of an unsafe accident, but also restore the button cell into a normal use state.
In specific implementation, for example, when the button cell of this embodiment is applied to an electronic device, the current in the button cell increases due to a short circuit or other abnormal reasons inside the button cell, and further the temperature of the button cell increases, and at this time, the blocking member can convert the conducting state inside the button cell into the non-conducting state when the temperature of the button cell increases to a certain specific temperature value, so as to cut off the current in the button cell, thereby avoiding an unsafe accident; if the external charging device of the button cell is charged, the external charging device is not timely disconnected after the button cell is fully charged, so that the button cell is overcharged, heated and heated, and the temperature of the button cell rises, at the moment, the blocking piece can convert the conduction state inside the button cell into the non-conduction state when the temperature of the button cell rises to a certain specific temperature value, so that the charging circuit of the button cell is cut off, and unsafe accidents can be avoided.
The button cell of the embodiment comprises a cell 1 and an external conduction assembly 2 arranged outside the cell 1 in a surrounding manner, wherein a first tab and a second tab are arranged on the cell 1 and are respectively electrically connected with the external conduction assembly 2, so that electric energy generated on the cell 1 can be output outwards through the external conduction assembly 2; meanwhile, the blocking piece 3 is arranged, and the blocking piece 3 is used for changing the internal conduction state of the button cell according to the temperature of the button cell, so that the internal electric connection of the button cell can be disconnected when the temperature of the button cell is too high, and unsafe accidents are prevented; furthermore, by forming part of the outer conducting member 2 as the blocking member 3, it is not necessary to additionally provide a connecting circuit for the blocking member 3 and the blocking member 3, thereby not only saving the internal space of the button cell, but also simplifying the structure and connection manner of the button cell.
In particular, the blocking member 3 comprises a first conductor layer 31, a conductive polymer connection layer 33 and a second conductor layer 32 connected in sequence along the electrical conduction path of the button cell.
The first conductor layer 31 and the second conductor layer 32 may be metal sheets, for example: a nickel or steel sheet; the conductive layer may be made of other conductive materials as long as the requirements of the present invention on the first conductive layer 31 and the second conductive layer 32 can be satisfied, and the present invention is not limited in this respect. The first conductor layer 31 and the second conductor layer 32 may be the same or different.
The polymer connection layer 33 is used to electrically disconnect the first conductor layer 31 from the second conductor layer 32 when the temperature of the button cell is higher than or equal to a preset temperature, or to electrically connect the first conductor layer 31 to the second conductor layer 32 when the temperature of the button cell is lower than the preset temperature. The preset temperature can be set according to actual needs, and then the material and the components of the polymer connecting layer 33 are adjusted, so that the polymer connecting layer 33 can disconnect the electrical connection between the first conductor layer 31 and the second conductor layer 32 when the temperature of the button cell is greater than or equal to the preset temperature, and restore the electrical connection between the first conductor layer 31 and the second conductor layer 32 when the temperature of the button cell is less than the preset temperature.
In a specific implementation, when the temperature of the button cell rises above a preset temperature for some reasons, the temperature of the blocking member 3 arranged on the button cell also rises, and the polymer connecting layer 33 inside the blocking member 3 can break the electrical connection between the first conductor layer 31 and the second conductor layer 32, so that the temperature of the button cell can be gradually reduced to avoid unsafe accidents; when the temperature of the button cell is reduced to be less than the preset temperature, the polymer connecting layer 33 inside the blocking member 3 can restore the electrical connection between the first conductor layer 31 and the second conductor layer 32, so that the button cell can be restored to normal use, and the equipment using the button cell can work normally.
As shown in fig. 4 and 5, further, the polymer connecting layer 33 includes conductive graphite 331 and an insulating polymer 332, the conductive graphite 331 and the insulating polymer 332 are juxtaposed on the electrical conduction path of the button cell, and one end of the conductive graphite 331 is electrically connected to the first conductor layer 31, and the other end of the conductive graphite 331 is electrically connected to the second conductor layer 32, so that the conductive graphite 331 in the polymer connecting layer 33 can form an electrical connection between the first conductor layer 31 and the second conductor layer 32 (as shown in fig. 5) when the button cell is in a normal temperature state, thereby ensuring that the button cell can be normally used.
The volume of the insulating polymer 332 can be changed along with the temperature change of the button cell, so that the connection state between the conductive graphite 331 and the first conductor layer 31 and the second conductor layer 32 can be changed, for example, when the temperature of the button cell rises, the volume of the insulating polymer 332 is changed, so that the electrical connection state formed between the conductive graphite 331 and the first conductor layer 31 and the second conductor layer 32 can be interrupted (as shown in fig. 5), and thus the button cell can be prevented from being unsafe due to over-high temperature.
In a specific implementation where the volume of the insulating polymer 332 changes with temperature changes of the button cell:
a preferred implementation is as follows: the volume change of the insulating polymer 332 and the temperature change of the button cell may be in a positive correlation such that the insulating polymer 332 expands and disconnects the conductive graphite 331 when the temperature of the button cell is higher than or equal to a preset temperature, or contracts when the temperature of the button cell is lower than the preset temperature, so that the conductive graphite 331 and the first conductor layer 31 and the second conductor layer 32 are electrically restored.
In specific implementation, since the volume change of the insulating polymer 332 and the temperature change of the button cell are in a positive correlation, when the temperature of the button cell is higher than or equal to a preset temperature, the volume of the insulating polymer 332 expands and breaks the continuity of the conductive graphite 331 between the first conductor layer 31 and the second conductor layer 32, so that the electrical connection formed by the conductive graphite 331 between the first conductor layer 31 and the second conductor layer 32 is broken, the current in the button cell is cut off, and the temperature of the button cell can be prevented from being continuously increased to avoid causing unsafe accidents; when the temperature of the button cell is reduced and lower than the preset temperature after power failure, the volume of the insulating polymer 332 shrinks, so that the continuity of the conductive graphite 331 between the first conductor layer 31 and the second conductor layer 32 is restored, the electrical connection of the conductive graphite 331 formed between the first conductor layer 31 and the second conductor layer 32 is restored, and the button cell can be restored to normal operation.
Specifically, the outer conductive assembly 2 may include a casing 21 having an opening at one end and a bottom cover 22 covering the opening of the casing 21, where the battery cell 1 is located in a cavity enclosed by the casing 21 and the bottom cover 22, the first tab is electrically connected to the casing 21, and the second tab is electrically connected to the bottom cover 22.
The joint of the casing 21 and the bottom cover 22 is insulated to avoid short circuit between the first tab and the second tab, so as to ensure normal use of the button cell. In addition, the housing 21 and the bottom cover 22, on the one hand, can be used as a conduction member for electrically connecting the button cell with the outside, and can perform the function of transmitting electric energy; on the other hand, the battery cell can be used as a peripheral structure of the battery cell 1, and plays a role in protecting the battery cell 1 and the tabs on the battery cell 1.
Further, a portion of the outer conductive component 2 is formed as a blocking member 3, and specific implementations of the blocking member 3 on the outer conductive component 2 include, but are not limited to, the following two possible implementations:
the first possible implementation manner is: at least a part of the bottom cover 22 is formed as the blocking member 3, that is, the blocking member 3 may be formed by a part of the bottom cover 22, for example, the blocking member 3 may be formed by a middle part of the bottom cover 22, or may be formed by an edge part of the bottom cover 22, and the shape of the blocking member 3 may be set to any shape such as a circle, a square, or a ring according to actual needs; the blocking member 3 may be formed entirely of the bottom cover 22. Specifically, the first conductor layer 31 may be a surface of the bottom cover 22 facing the outside of the button cell, and the second conductor layer 32 may be connected to the second tab; alternatively, the second conductor layer 32 may be the surface of the bottom cover 22 facing the outside of the button cell, and the first conductor layer 31 may be connected to the second tab.
In particular, when the temperature of the button cell is too high, the blocking member 3 formed by the bottom cover 22 can break the electrical connection between the first conductor layer 31 and the second conductor layer 32, so that the second tab cannot be connected to the external circuit of the button cell, thereby preventing the temperature of the button cell from rising continuously and causing unsafe accidents.
A second possible implementation is: at least part of the housing 21 is formed as the blocking member 3, that is, the blocking member 3 may be formed by a part of the housing 21, for example, the blocking member 3 may be formed by a middle part of the housing 21, or may be formed by an edge part of the housing 21, and the shape of the blocking member 3 may be set to any shape such as a circle, a square, or a ring according to actual needs; the blocking member 3 may also be formed entirely of the housing 21. Specifically, the first conductor layer 31 may be a surface of the case 21 facing the outside of the button cell, and the second conductor layer 32 may be connected to the first tab; alternatively, the second conductor layer 32 may be the surface of the casing 21 facing the outside of the button cell, and the first conductor layer 31 may be connected to the first tab.
In a specific implementation, when the temperature of the button cell is too high, the blocking member 3 formed by the housing 21 can break the electrical connection between the first conductor layer 31 and the second conductor layer 32, so that the first tab cannot be connected to the external circuit of the button cell, and thus the temperature of the button cell can be prevented from rising continuously and causing unsafe accidents.
In the above two implementation manners, the casing 21 or the bottom cover 22 is formed as the blocking member 3, so that the casing 21 or the bottom cover 22 can perform functions of transmitting electric energy and protecting the battery cell, and can prevent the button cell from being unsafe. Moreover, the blocking piece 3 is directly formed by the shell 21 or the bottom cover 22, so that a connecting circuit of the blocking piece 3 and the blocking piece 3 is not required to be additionally arranged, the internal space of the button cell is saved, the miniaturization development of the button cell is facilitated, or the battery cell is increased to improve the performance of the button cell; and the structure and the connection mode of the button cell are simplified, and the button cell is convenient to disassemble, assemble and replace parts.
In other embodiments, the specific shape or position of the blocking member 3 formed by the partial outer guide assembly 2 may also be adjusted according to actual situations, and will not be described herein again.
Further, in order to form good insulation between the casing 21 and the bottom cover 22, the button cell may further include an insulating member, so that the joint between the casing 21 and the bottom cover 22 can be insulated by the insulating member, and the insulating member can also achieve good sealing between the casing 21 and the bottom cover 22, so as to better protect the battery cell.
Preferably, the insulating member may be an insulating rubber ring 221 sleeved on the outer edge of the bottom cover 22, and in the process of assembling the button cell, the insulating member can be installed only by sleeving the insulating rubber ring 221 on the bottom cover 22, so that the button cell can be disassembled and assembled and parts such as the insulating rubber ring can be replaced conveniently. In addition, the specific shape of the insulating rubber ring 221 can be adjusted according to the actual shape of the housing 21 and the bottom cover 22 of the button cell.
In other embodiments, the insulating arrangement between the housing 21 and the bottom cover 22 may be accomplished by applying glue to the joint surface of the bottom cover 22 and the housing 21 to form an insulating member.
As shown in fig. 6 and 7, a specific implementation manner of the button cell is that the whole bottom cover 22 is formed as the blocking member 3, wherein the first conductor layer 31 is connected with the second pole ear of the battery cell 1, and the second conductor layer 22 is formed as one surface of the bottom cover 22 facing the outside of the button cell. During specific assembly, firstly, the battery cell 1 is placed in the shell 21, the first tab of the battery cell 1 is connected with the shell 21, and the insulating rubber ring 221 is sleeved on the outer edge of the blocking piece 3 (bottom cover 22); then, buckling the blocking piece 3 (bottom cover 22) sleeved with the insulating rubber ring 221 at one end of the shell 21 with an opening, and connecting the second tab of the battery cell 1 with the first conductor layer 31 of the blocking piece 3 (bottom cover 22); finally, the casing 21 is necked down to complete the engagement between the casing 21 and the blocking member 3 (bottom cover 22), thereby completing the assembly of the button cell.
In the button cell battery of the present embodiment, the case 21 may be a stamped part formed by stamping or may be a part formed by other processing methods. The battery core 1 may be a special-shaped stepped battery core, or other types of battery cores set according to actual requirements of the button battery, and meanwhile, the battery core 1 may be made by a conventional winding process, a conventional lamination process, or other process manners.
Example two
The embodiment provides an electronic product, which comprises a button cell.
The button cell in this embodiment has the same structure as the button cell provided in the above embodiment, and can bring about the same or similar technical effects, and details are not repeated herein, and reference may be specifically made to the description of the above embodiment.
In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if any), and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing the present invention and to simplify description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 by those of ordinary skill in the art through specific situations.
The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A button cell is characterized by comprising a cell and an external conduction assembly arranged outside the cell in a surrounding manner, wherein the cell is provided with a first tab and a second tab, and the first tab and the second tab are respectively and electrically connected with the external conduction assembly;
part of the outer conductive component is formed as a blocking member for changing the internal conduction state of the button cell depending on the temperature of the button cell.
2. The button cell according to claim 1, wherein the blocking member comprises a first conductor layer, a conductive polymer connecting layer, and a second conductor layer connected in sequence along an electrically conductive path of the button cell;
the polymer connecting layer is used for enabling the first conductor layer and the second conductor layer to be electrically disconnected when the temperature of the button cell is higher than or equal to a preset temperature, or enabling the first conductor layer and the second conductor layer to be electrically connected when the temperature of the button cell is lower than the preset temperature.
3. The button cell according to claim 2, wherein the polymer connection layer comprises conductive graphite and an insulating polymer, the conductive graphite and the insulating polymer being juxtaposed on an electrically conductive path of the button cell;
one end of the conductive graphite is electrically connected with the first conductor layer, and the other end of the conductive graphite is electrically connected with the second conductor layer;
the volume of the insulating polymer can be changed along with the temperature change of the button cell so as to change the connection state between the conductive graphite and the first conductor layer and the second conductor layer.
4. The button cell according to any one of claims 1 to 3, wherein the outer conductive member comprises a case having an opening at one end and a bottom cover covering the opening of the case, and a joint of the case and the bottom cover is insulated;
the battery cell is located in a cavity enclosed by the shell and the bottom cover, the first pole lug is electrically connected with the shell, and the second pole lug is electrically connected with the bottom cover.
5. The button cell battery as defined in claim 4, wherein at least a portion of the bottom cover is formed as the blocking member, and the second tab is electrically connected to the blocking member.
6. The button cell according to claim 5, wherein the entire bottom cover is formed as the blocking member.
7. The button cell according to claim 4, wherein at least a portion of the case is formed as the blocking member, and the first tab is electrically connected to the blocking member.
8. The button cell according to claim 7, wherein the entire housing is formed as the blocking member.
9. The button cell according to claim 4, further comprising an insulator, wherein the junction of the housing and the bottom cover is insulated by the insulator.
10. An electronic product, characterized in that it comprises a button cell according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010113104.9A CN111180652A (en) | 2020-02-24 | 2020-02-24 | Button cell and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010113104.9A CN111180652A (en) | 2020-02-24 | 2020-02-24 | Button cell and electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111180652A true CN111180652A (en) | 2020-05-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010113104.9A Pending CN111180652A (en) | 2020-02-24 | 2020-02-24 | Button cell and electronic product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111180652A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525083A (en) * | 2020-05-28 | 2020-08-11 | 瑞声科技（南京）有限公司 | Button cell |
| CN111599977A (en) * | 2020-06-03 | 2020-08-28 | 海口博澳国兴新能源科技有限公司 | High-capacity lithium ion battery and electric equipment |
| CN112803109A (en) * | 2021-01-14 | 2021-05-14 | 湖南亿等新能源有限公司 | Soft package button cell |
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| CN86107986A (en) * | 1985-12-02 | 1987-07-15 | 埃默森电气公司 | Hermetically sealed battery cover assembly |
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| CN211088388U (en) * | 2020-02-24 | 2020-07-24 | 珠海冠宇电池股份有限公司 | Button cell and electronic product |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86107986A (en) * | 1985-12-02 | 1987-07-15 | 埃默森电气公司 | Hermetically sealed battery cover assembly |
| CN101501882A (en) * | 2006-06-23 | 2009-08-05 | 波士顿电力公司 | Lithium battery with external positive thermal coefficient layer |
| US20100203367A1 (en) * | 2009-02-12 | 2010-08-12 | Shanghai Byd Company Limited | End cover assembly for battery and battery containing the same |
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| CN111525083A (en) * | 2020-05-28 | 2020-08-11 | 瑞声科技（南京）有限公司 | Button cell |
| CN111599977A (en) * | 2020-06-03 | 2020-08-28 | 海口博澳国兴新能源科技有限公司 | High-capacity lithium ion battery and electric equipment |
| CN112803109A (en) * | 2021-01-14 | 2021-05-14 | 湖南亿等新能源有限公司 | Soft package button cell |
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| PB01 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai CosMX Battery Co.,Ltd. Address before: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
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