CN211017281U - Lithium ion battery containing internal short circuit device - Google Patents
Lithium ion battery containing internal short circuit device Download PDFInfo
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- CN211017281U CN211017281U CN201922013530.0U CN201922013530U CN211017281U CN 211017281 U CN211017281 U CN 211017281U CN 201922013530 U CN201922013530 U CN 201922013530U CN 211017281 U CN211017281 U CN 211017281U
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Abstract
The utility model discloses a lithium ion battery containing internal short circuit device, lithium ion battery include anode plate, cathode plate and barrier film, internal short circuit device includes first electrically conductive metalwork, locates the electrically conductive metalwork of the inboard second of anode plate and/or cathode plate and is used for separating the insulating paraffin layer of first electrically conductive metalwork and the electrically conductive metalwork of second, first electrically conductive metalwork runs through and locates on the barrier film and through the electrically conductive metalwork contact of insulating paraffin layer and second. The utility model discloses can make the square hard shell lithium ion battery who contains interior short-circuit device, short circuit type, the different short circuit area of control in can controlling four kinds of differences make module and battery system that contain this type of electric core to short-circuit device in can starting as required.
Description
Technical Field
The utility model belongs to the technical field of the new forms of energy battery, concretely relates to lithium ion battery who contains interior short-circuit device.
Background
The lithium ion cell is a secondary cell capable of being repeatedly charged and discharged and is composed of main components such as cathode and anode plates, a separation film, electrolyte, mechanical parts and the like. In the whole life cycle process of the lithium ion battery cell, when failure analysis research of the battery cell is carried out, the root cause of the problem of the battery cell is difficult to analyze. Internal short circuits are widely recognized as a common failure mode for lithium ion batteries. Such failures are often very acute and often accompanied by smoking, fire, explosion, etc., with serious consequences. Therefore, the research on the mechanism of the internal short circuit is very important.
In the field of safety testing of lithium ion batteries, methods such as needling, overcharging, thermal abuse, extrusion and the like are generally used for simulating the failure condition of the battery. However, these methods are too drastic to reproduce the failure of the lithium ion battery due to internal short circuit during its natural aging process. Therefore, a gentle simulation method is required. Patent 201710719164.3 discloses a simple device for simulating internal short circuit, which is made by piercing a membrane with a nickel plate and then sealing it on one side with paraffin. The device is usually used without difference from a normal battery, and paraffin is melted by heating to trigger an internal short circuit. The disadvantage is that different types of short-circuit patterns cannot be simulated. The U.S. space agency publishes a tool which can simulate different types of short-circuit modes, but the tool is only applied to 18650 cylindrical batteries, and devices of different internal short-circuit types are the same, so that internal contact internal resistance is possibly high, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the technical problem who exists among the prior art. Therefore, the utility model provides a lithium ion battery who contains interior short circuit device, the purpose is the short circuit mode of the different grade type of being convenient for simulate.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
the utility model provides a lithium ion battery who contains interior short circuit device, includes positive pole piece, negative pole piece and barrier film, interior short circuit device includes first electrically conductive metalwork, locates the electrically conductive metalwork of the inboard second of positive pole piece and/or negative pole piece and is used for separating the insulating paraffin layer of first electrically conductive metalwork and the electrically conductive metalwork of second, first electrically conductive metalwork runs through locate on the barrier film and through the electrically conductive metalwork contact of insulating paraffin layer and second.
The first conductive metal piece is a first copper metal piece.
The first copper metal part is a copper sheet, a copper strip or a copper wire.
The second conductive metal piece comprises a second copper conductive piece, and the second copper conductive piece is arranged on the copper foil of the anode pole piece and penetrates through the anode material to be in contact with the insulating paraffin layer.
The first conductive metal part is a first aluminum metal part, the second conductive metal part comprises a second aluminum conductive part, and the second aluminum conductive part is arranged on the aluminum foil of the cathode pole piece and penetrates through the cathode material to be in contact with the insulating paraffin layer.
The second conductive metal piece comprises a second aluminum conductive piece and a second copper conductive piece, the second aluminum conductive piece is arranged on the aluminum foil of the cathode pole piece and penetrates through the cathode material to be in contact with the insulating paraffin layer, and the second copper conductive piece is arranged on the copper foil of the anode pole piece and penetrates through the anode material to be in contact with the first conductive metal piece.
The second copper conductive piece is a copper disc, and the second aluminum conductive piece is an aluminum disc.
The corresponding metal sheet material is changed when different short circuit types are changed; and different types of internal short circuit types, wiping off the corresponding main material, and using the corresponding metal sheet to test different short circuit types.
The utility model has the advantages that: the utility model discloses can make the square hard shell lithium ion battery that contains interior short circuit device, can control four kinds of different interior short circuit types, control different short circuit areas, control different shapes sheetmetal short circuits, make module and battery system that contain this type of electric core, and can start interior short circuit device as required; a trigger device is added in the module or the system, so that the failure mode of short circuit in the lithium ion battery and the thermal expansion state of the battery module can be better simulated.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of example 2;
FIG. 3 is a schematic structural view of embodiment 3;
FIG. 4 is a schematic structural view of example 4;
FIG. 5 is a schematic diagram of the placement of an internal shorting device within a battery;
FIG. 6 is a graph of temperature, voltage versus time during a cathode-copper internal short test;
FIG. 7 is a graph of temperature and voltage versus time during an aluminum-anode internal short test.
Labeled as:
1. the device comprises a separation film, 2, copper foil, 3, an anode material, 4, aluminum foil, 5, a cathode material, 6, a first conductive metal part, 7, a second copper conductive part, 8, an insulating paraffin layer, 9, a second aluminum conductive part, 10, an internal short circuit device, 11, an anode pole piece, 12 and a cathode pole piece.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, for the purpose of helping those skilled in the art to understand more completely, accurately and deeply the conception and technical solution of the present invention, and to facilitate its implementation. It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. In the following embodiments, the terms "first", "second" and "third" do not denote absolute differences in structure and/or function, nor do they denote a sequential order of execution, but rather are used for descriptive convenience only.
As shown in fig. 1 to 4, a lithium ion battery containing an internal short circuit device, including an anode plate 11, a cathode plate 12 and an isolating membrane 1, the anode plate (anode plate) includes a copper foil 2 and an anode material 3 coated on the copper foil, the cathode plate (cathode plate) includes an aluminum foil 4 and a cathode material 5 coated on the aluminum foil 4, the internal short circuit device includes a first conductive metal piece 6, a second conductive metal piece arranged on the inner side of the anode plate and/or the cathode plate and an insulating paraffin layer 8 for separating the first conductive metal piece and the second conductive metal piece, the first conductive metal piece 2 penetrates through the isolating membrane 1 and contacts with the second conductive metal piece 3 through the insulating paraffin layer 4.
The first conductive metal part is a first copper metal part. The first copper metal part is a copper sheet, a copper strip or a copper wire.
When simulating a short circuit in the cathode and the copper current collector, as shown in fig. 2, the second conductive metal part includes a second copper conductive member 7, and the second copper conductive member 7 is disposed on the copper foil 2 of the anode piece and penetrates through the anode material 3 to contact the insulating paraffin layer 8. The insulating paraffin layer separates and insulates the second conductive metal part and the first conductive metal part, and when the insulating paraffin layer is heated and melted, the first conductive metal part is conducted with the second conductive metal part. The second copper conducting member is preferably a copper disc.
When the simulation aluminum current collector and the anode are short-circuited, as shown in fig. 3, the first conductive metal part 6 is a first aluminum metal part, the second conductive metal part includes a second aluminum conductive part 9, and the second aluminum conductive part 9 is disposed on the aluminum foil 4 of the cathode plate and penetrates through the cathode material 5 to contact the insulating paraffin layer 8. The insulating paraffin layer separates and insulates the second conductive metal part and the first conductive metal part, and when the insulating paraffin layer is heated and melted, the first conductive metal part is conducted with the second conductive metal part. The first aluminum metal piece is an aluminum sheet or an aluminum strip. The second aluminum conductive member is preferably an aluminum disk.
When the simulation of the short circuit between the aluminum current collector and the copper current collector is performed, as shown in fig. 4, the second conductive metal part includes a second aluminum conductive member 9 and a second copper conductive member 7, the second aluminum conductive member 9 is disposed on the aluminum foil 4 of the cathode plate and penetrates through the cathode material 5 to contact the insulating paraffin layer 8, and the second copper conductive member 7 is disposed on the copper foil 2 of the anode plate and penetrates through the anode material 3 to contact the first conductive metal part 6.
The manufacturing method of the lithium ion battery with the internal short-circuit device comprises the steps of spreading a wound naked battery core, digging an isolation film at the corresponding layer of the outer ring of the selected cathode, placing the internal short-circuit device, uniformly coating paraffin after placing, winding the naked battery core, pasting a tail rubber, shaping, drying, injecting liquid, forming, welding and coating to obtain the lithium ion battery core.
During specific operation, the placed inner short circuit simulation device in the wound naked electric core: and slightly spreading the bare cell pole piece, and digging an isolating membrane at the 2 nd layer of the cathode outer ring. The area of the internal short circuit in the manual simulation is controlled by the excavation size. The internal shorting device is then placed. After the metal sheet is placed, paraffin is uniformly coated, the bare cell is coiled, and a tail rubber is attached. If different types of short circuit modes need to be simulated, the main material on the pole piece at the corresponding position needs to be wiped off.
And (4) after the internal short circuit simulation device is placed in the wound bare cell, performing a low-temperature hot-pressing shaping process. When different short circuit types need to be simulated manually, corresponding main materials need to be wiped off, corresponding inner short circuit metal sheets are used, and then the hot-press shaping process is carried out. Because the naked electric core contains the phase-change material (insulating paraffin layer), the traditional hot-pressing shaping can cause the naked electric core to melt, so a low-temperature hot-pressing process is needed. During subsequent assembly, care is also taken that the ambient temperature of all processes does not exceed 50 degrees. Similarly, a low temperature drying process was used before injection, drying was performed at 45 ℃. And then obtaining the lithium ion cell product through liquid injection, formation, welding and film coating.
The lithium ion battery containing the internal short-circuiting device is assembled into a module or a battery system, and the battery module or the system containing the internal short-circuiting device can be obtained.
The method for triggering the internal short circuit of the lithium ion battery comprising the internal short circuit device comprises the steps of placing the positive side of a module containing the internal short circuit device on a heating plate, heating the lithium ion battery containing the internal short circuit device through an electric furnace, and heating and melting an insulating paraffin layer, so that a first conductive metal piece, a second conductive metal piece, and the anode pole piece and the cathode pole piece of the battery are conducted, and the lithium ion battery is internally short-circuited. During specific operation, the positive electrode side of the module containing the internal short-circuit device is placed on the heating plate, 1 2P battery containing the internal short-circuit device is heated through the electric furnace, the voltage and the temperature of each battery are detected in a multi-path mode, the voltage and the temperature change are observed in the positive electrode side heating process, and the effective mode of the internal short-circuit battery and the subsequent module thermal expansion state of the internal short-circuit battery can be researched.
The following is detailed by specific examples:
example 1
Simulating a short circuit type between the cathode and the anode, namely a first short circuit type; in the process of manufacturing the square hard shell lithium ion battery cell, a wound naked battery cell can be obtained after the working procedures of homogenizing, coating, cold pressing, die cutting, slitting and winding. Open naked electric core pole piece gently, in order to guarantee naked electric core overlap size and thermocouple monitoring electric core surface temperature after coiling, select to place like the interior short circuit device shown in figure 1 in the negative pole outer lane 2 nd layer department near naked electric core surface. After the copper metal sheet is placed, paraffin is evenly coated, the bare cell is coiled, and a tail rubber is attached. And after the internal short circuit simulation device is placed in the wound bare cell, the wound bare cell undergoes a low-temperature hot-pressing shaping process. Because the naked electric core contains the phase-change material, the melting point of the material is about 60 ℃, and the traditional high-temperature hot-pressing shaping can cause the melting; during the subsequent assembly process, it is noted that the ambient temperature of all processes does not exceed 50 degrees. Similarly, a low-temperature drying process is adopted before injection, and vacuum drying is carried out at 45 ℃. And then obtaining the lithium ion cell product through liquid injection, formation, welding and film coating. The electric core that will contain interior short circuit device is parallelly connected in series, and the welding of short slab curb plate connects the welding of ba and forms 2P7S battery module, heats 2P7S module one end through the electric stove hot plate, and the heating end is the battery that contains interior short circuit device, simulates the failure mode of short circuit in the lithium ion battery and the thermal expansion state of battery module. Particularly, the failure condition of the first short circuit type and the thermal expansion state of the module under different conditions can be simulated by controlling the size of the inner short circuit device and the shapes of different metal sheets. In this example, an internal short circuit cell of a first short circuit type was prepared by providing a circular internal short circuit device (the first conductive metal was a circular copper sheet with a diameter of 10mm and a thickness of about 100 μm) having a diameter of 10 mm. The battery core is heated to 80 ℃ for heat preservation, and the internal phase-change material is triggered to melt to form an internal short circuit in a 100% SOC state. After the internal short circuit, the voltage does not drop suddenly and drops slowly continuously, the voltage drops 50mV cumulatively within 1h, the internal resistance slightly fluctuates to 0.81m omega after dropping to 0.77m omega, and the single electric core does not generate thermal runaway. Similarly, the short circuit battery cell containing the first short circuit type is assembled into a 2P7S battery module, the short circuit battery cell is triggered by the heating furnace to generate internal short circuit, and the module battery cell cannot generate failure and thermal expansion. The first internal short circuit type of the square aluminum-shell cell is relatively safe in the short circuit area and the charge state.
Example 2
Simulating a short circuit type between the cathode and the Cu current collector, namely a second short circuit type; in the process of manufacturing the square hard shell lithium ion battery cell, a wound naked battery cell can be obtained after the working procedures of homogenizing, coating, cold pressing, die cutting, slitting and winding. And lightly spreading the bare cell pole piece, and lightly wiping the active material on the anode by using NMP to leak the Cu foil. In order to ensure the dimension of the wound bare cell overlap and the surface temperature of the cell monitored by a thermocouple, an inner short-circuit device shown in fig. 2 is placed at the 2 nd layer of the outer ring of the cathode close to the surface of the bare cell. Evenly coating paraffin after placing the round metal sheet, rolling the bare cell, and sticking a tail rubber. And after the internal short circuit simulation device is placed in the wound bare cell, the wound bare cell undergoes a low-temperature hot-pressing shaping process. Because the naked electric core contains the phase-change material, the melting point is about 60 ℃, and the traditional high-temperature hot-pressing shaping can cause the naked electric core to be melted; during the subsequent assembly process, it is noted that the ambient temperature of all processes does not exceed 50 degrees. Similarly, a low temperature drying process was used before injection, drying was performed at 45 ℃. And then obtaining the lithium ion cell product through liquid injection, formation, welding and film coating. The electric core that will contain interior short circuit device is parallelly connected in series, and the welding of short slab curb plate connects the welding of ba and forms 2P7S battery module, heats 2P7S module one end through the electric stove hot plate, and the heating end is the battery that contains interior short circuit device, simulates the failure mode of short circuit in the lithium ion battery and the thermal expansion state of battery module. In particular, the size of the inner short-circuit device and the shapes of different metal sheets can be controlled to simulate the failure condition of the second short-circuit type with different sizes and the thermal expansion state of the module. In this embodiment, a circular internal short circuit device with a diameter of 10mm is provided (the first conductive metal part 6 is a circular copper sheet with a diameter of no more than 10mm, the second copper conductive part is a circular copper disc with a diameter of 10mm, the diameter of the insulating paraffin layer is also 10mm, the thicknesses of the circular copper sheet and the copper disc are both about 100 μm, and the thickness of the insulating paraffin layer is less than 100 μm), so as to prepare an internal short circuit cell with a second short circuit type. The battery core is heated to 80 ℃ for heat preservation, and the internal phase-change material is triggered to melt to form an internal short circuit in a 100% SOC state. The conclusion is that after the internal short circuit, the voltage does not drop suddenly and continuously and slowly drops, the voltage drops by 30mV cumulatively within 1h, the internal resistance is 0.73m omega and drops to 0.67m omega, and the single battery cell does not generate thermal runaway. Similarly, a 2P7S battery module is assembled by short circuit cells containing the second short circuit type, the short circuit cells are triggered to generate internal short circuit by heating the short circuit cells at 80 ℃ through a heating furnace, and the module cells cannot lose effectiveness and expand heat. The second internal short circuit type of the square aluminum-shell battery cell is relatively safe under the short circuit area and the charge state.
Example 3
Simulating an Al current collector and an internal short circuit type of the anode, namely a third short circuit type; in the process of manufacturing the square hard shell lithium ion battery cell, a wound naked battery cell can be obtained after the working procedures of homogenizing, coating, cold pressing, die cutting, slitting and winding. And slightly spreading the bare cell pole piece, slightly wiping an active material on the cathode by using NMP (N-methyl pyrrolidone), leaking Al foil, and selecting the 2 nd layer of the outer ring of the cathode close to the surface of the bare cell to place the inner short-circuit device in order to ensure the over-hang size of the wound bare cell and the surface temperature of the cell monitored by a thermocouple. After the metal sheet is placed, paraffin is uniformly coated, the bare cell is coiled, and a tail rubber is attached. And after the internal short circuit simulation device is placed in the wound bare cell, the wound bare cell undergoes a low-temperature hot-pressing shaping process. Because the naked electric core contains the phase-change material, the melting point is about 60 ℃, and the traditional high-temperature hot-pressing shaping can cause the naked electric core to be melted; during the subsequent assembly process, it is noted that the ambient temperature of all processes does not exceed 50 degrees. Similarly, a low temperature drying process was used before injection, drying was performed at 45 ℃. And then obtaining the lithium ion cell product through liquid injection, formation, welding and film coating. The electric core that will contain interior short circuit device is parallelly connected in series, and the welding of short slab curb plate connects the welding of ba and forms 2P7S battery module, heats 2P7S module one end through the electric stove hot plate, and the heating end is the battery that contains interior short circuit device, simulates the failure mode of short circuit in the lithium ion battery and the thermal expansion state of battery module. Particularly, the size of the inner short-circuit device and the shapes of different metal sheets can be controlled to simulate the failure condition of a third short-circuit type with different sizes and the thermal expansion state of a module. In this embodiment, a circular internal short circuit device with a diameter of 10mm is provided (the first conductive metal part 6 is a circular aluminum sheet with a diameter of no more than 10mm, the second aluminum conductive part is an aluminum disk with a diameter of 10mm, the thicknesses of the circular aluminum sheet and the aluminum disk are both about 100 μm, and the thickness of the insulating paraffin layer is less than 100 μm), so as to prepare a third short circuit type internal short circuit cell. The battery core is heated to 80 ℃ for heat preservation, and the internal phase-change material is triggered to melt to form an internal short circuit in a 100% SOC state. After the internal short circuit, the electric core is out of control thermally, the voltage drops to 0V, the internal resistance suddenly rises earlier than the voltage change for 2s, and the temperature of the single electric core exceeds 600 ℃. Similarly, the short circuit cell containing the third short circuit type is assembled into a 2P7S battery module, the short circuit cell is triggered to generate internal short circuit when the short circuit cell is heated to more than 80 ℃ by a heating furnace, the directly heated internal short circuit cell is failed, the short circuit cell is ignited and exploded, the thermal expansion sequence gradually starts to spread from the heating end to the other end, and the third internal short circuit type danger of the square aluminum shell cell is shown under the short circuit area and the charge state.
Example 4
Simulating a short circuit type in the Al current collector and the Cu current collector, namely a fourth short circuit type; in the process of manufacturing the square hard shell lithium ion battery cell, a wound naked battery cell can be obtained after the working procedures of homogenizing, coating, cold pressing, die cutting, slitting and winding. And slightly spreading the bare cell pole piece, slightly wiping active materials on the cathode and the anode by using NMP (N-methyl pyrrolidone), leaking Al and Cu foils, and selecting the 2 nd layer of the outer ring of the cathode close to the surface of the bare cell to place the inner short-circuit device in order to ensure the over-hang size of the wound bare cell and the surface temperature of the cell monitored by a thermocouple. After the metal sheet is placed, paraffin is uniformly coated, the bare cell is coiled, and a tail rubber is attached. And after the internal short circuit simulation device is placed in the wound bare cell, the wound bare cell undergoes a low-temperature hot-pressing shaping process. Because the naked electric core contains the phase-change material, the melting point is about 60 ℃, and the traditional high-temperature hot-pressing shaping can cause the naked electric core to be melted; during the subsequent assembly process, it is noted that the ambient temperature of all processes does not exceed 50 degrees. Similarly, a low temperature drying process was used before injection, drying was performed at 45 ℃. And then obtaining the lithium ion cell product through liquid injection, formation, welding and film coating. The electric core that will contain interior short circuit device is parallelly connected in series, and the welding of short slab curb plate connects the welding of ba and forms 2P7S battery module, heats 2P7S module one end through the electric stove hot plate, and the heating end is the battery that contains interior short circuit device, simulates the failure mode of short circuit in the lithium ion battery and the thermal expansion state of battery module. Particularly, the size of the inner short-circuit device and the shape of different metals can be controlled to simulate the failure condition of a fourth short-circuit type with different sizes and the thermal expansion state of a module. In this embodiment, a circular internal short circuit device with a diameter of 10mm is provided (the first conductive metal part 6 is a copper sheet with a diameter of no more than 10mm, the second copper conductive part 7 is a copper disc with a diameter of 10mm, the second aluminum conductive part is an aluminum disc with a diameter of 10mm, the thicknesses of the circular copper sheet, the copper disc and the aluminum disc are all about 100 μm, and the thickness of the insulating stone wax layer is less than 100 μm), so as to prepare a fourth short circuit type internal short circuit cell. The battery core is heated to 80 ℃ for heat preservation, and the internal phase-change material is triggered to melt to form an internal short circuit in a 100% SOC state. After the internal short circuit, the voltage does not drop suddenly and drops continuously and slowly, the accumulated voltage drops by 20mV within 1h, the internal resistance drops to 0.70m omega by 0.79m omega, and the single electric core does not generate thermal runaway. Similarly, a 2P7S battery module is assembled by the short circuit cells containing the fourth short circuit type, the short circuit cells are triggered to generate internal short circuit by heating the short circuit cells at 80 ℃ through a heating furnace, and the module cells cannot lose effectiveness and expand heat. The fourth internal short circuit type of the square aluminum shell battery cell is relatively safe under the short circuit area and the charge state.
FIG. 6 is a graph of temperature, voltage, internal resistance versus time during a cathode-copper internal short test; FIG. 7 is a graph of temperature, voltage versus time during an aluminum-anode internal short test; according to the conclusion of the test, the temperature does not rise suddenly in the cathode-copper internal short circuit test process, the voltage does not drop by 0V, and the thermal runaway of the short circuit cell does not occur in the whole process; and thermal runaway occurs in the aluminum-anode internal short circuit test process, the temperature suddenly rises to 600 ℃, the internal resistance changes before the voltage changes, and 0V drops within 1s of the voltage.
The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical solution of the present invention can be directly applied to other occasions, all within the protection scope of the present invention.
Claims (7)
1. The utility model provides a lithium ion battery who contains interior short circuit device, includes anode plate, cathode plate and barrier film, its characterized in that, interior short circuit device includes first electrically conductive metalwork, locates the electrically conductive metalwork of the inboard second of anode plate and/or cathode plate and is used for separating the insulating paraffin layer of first electrically conductive metalwork and the electrically conductive metalwork of second, first electrically conductive metalwork runs through and locates on the barrier film and through the electrically conductive metalwork contact of insulating paraffin layer and second.
2. The lithium ion battery comprising an internal short circuit device according to claim 1, wherein the first electrically conductive metal piece is a first copper metal piece.
3. The lithium ion battery comprising an internal short circuit device according to claim 2, wherein the first copper metal piece is a copper sheet, a copper strip or a copper wire.
4. The lithium ion battery comprising an internal short circuit device according to claim 1, wherein the second conductive metal member comprises a second copper conductive member disposed on the copper foil of the anode plate and contacting the insulating paraffin layer through the anode material.
5. The lithium ion battery comprising an internal short circuit device according to claim 1, wherein the first conductive metal part is a first aluminum metal part, and the second conductive metal part comprises a second aluminum conductive part, and the second aluminum conductive part is disposed on the aluminum foil of the cathode plate and contacts the insulating paraffin layer through the cathode material.
6. The lithium ion battery comprising an internal short circuit device according to claim 1, wherein the second conductive metal member comprises a second aluminum conductive member disposed on the aluminum foil of the cathode plate and through the cathode material to contact the insulating paraffin layer, and a second copper conductive member disposed on the copper foil of the anode plate and through the anode material to contact the first conductive metal member.
7. The li-ion battery of claim 6, wherein the second copper conductive member is a copper disk and the second aluminum conductive member is an aluminum disk.
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| CN201922013530.0U CN211017281U (en) | 2019-11-20 | 2019-11-20 | Lithium ion battery containing internal short circuit device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890588A (en) * | 2019-11-20 | 2020-03-17 | 芜湖天弋能源科技有限公司 | Lithium ion battery comprising internal short circuit device, manufacturing method and triggering method |
| CN114200314A (en) * | 2020-09-18 | 2022-03-18 | 比亚迪股份有限公司 | System and test method for simulating thermal runaway induced by short circuit in battery |
| EP3982455A1 (en) * | 2020-10-07 | 2022-04-13 | Volkswagen Aktiengesellschaft | Battery cell for carrying out a security test |
-
2019
- 2019-11-20 CN CN201922013530.0U patent/CN211017281U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890588A (en) * | 2019-11-20 | 2020-03-17 | 芜湖天弋能源科技有限公司 | Lithium ion battery comprising internal short circuit device, manufacturing method and triggering method |
| CN114200314A (en) * | 2020-09-18 | 2022-03-18 | 比亚迪股份有限公司 | System and test method for simulating thermal runaway induced by short circuit in battery |
| EP3982455A1 (en) * | 2020-10-07 | 2022-04-13 | Volkswagen Aktiengesellschaft | Battery cell for carrying out a security test |
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