CN114976511A - Electricity core switching piece, power battery and electric motor car - Google Patents
Electricity core switching piece, power battery and electric motor car Download PDFInfo
- Publication number
- CN114976511A CN114976511A CN202210822469.8A CN202210822469A CN114976511A CN 114976511 A CN114976511 A CN 114976511A CN 202210822469 A CN202210822469 A CN 202210822469A CN 114976511 A CN114976511 A CN 114976511A
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- China
- Prior art keywords
- conductive part
- cell
- electric core
- lamination
- fuse wire
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005611 electricity Effects 0.000 title description 5
- 238000003475 lamination Methods 0.000 claims abstract description 23
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- QQHJESKHUUVSIC-UHFFFAOYSA-N antimony lead Chemical compound [Sb].[Pb] QQHJESKHUUVSIC-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910001174 tin-lead alloy Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000009028 cell transition Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
-
- 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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application relates to a battery cell patch, a power battery and an electric vehicle, wherein the battery cell patch comprises a fuse wire, a first conductive part and a second conductive part, one end of the first conductive part is used for being electrically connected with a tab, and the other end of the first conductive part extends along the height direction of a battery cell lamination and is electrically connected with the second conductive part; and the fuse wire is arranged between the first conductive part and the second conductive part, wherein one end of the fuse wire is electrically connected with the first conductive part, the other end of the fuse wire is electrically connected with the second conductive part, and the second conductive part is also used for being connected with the battery cell pole. This application can cause thermal runaway and produce high-temperature gas when this application passes through the fuse at the outside short circuit of electric core, interior short circuit or overcharge etc. and make and produce the automatic fusing of high-temperature gas trigger fuse, and then cut off the electric return circuit before the inside positive negative pole of electric core, and then cut off the production of heat source to avoid the emergence of electric core thermal runaway.
Description
Technical Field
The application relates to battery equipment, in particular to a battery cell adapter sheet, a power battery and an electric vehicle.
Background
At present, the naked electric core of lamination goes out utmost point ear in both sides, and the positive negative pole post of the crust electric core after the shaping is upwards, and then positive negative pole post and naked electric core utmost point ear pass through the switching piece to be connected, and further, its switching piece has following shortcoming: (1) when high-temperature gas is generated due to thermal runaway caused by external short circuit, internal short circuit or overcharge of the battery core, a positive and negative circuit in the battery core cannot be fused in time, further deterioration can cause thermal runaway of the battery core, and safety accidents are caused; (2) the internal temperature of the battery core is higher than that of a battery core pole (temperature sampling position point) by more than 10 ℃, due to the hysteresis of signal processing, when the BMS sends out thermal runaway prediction, the battery core has actually generated thermal runaway, and only thermal blockage can be realized through external passive measures at the moment, so that the thermal runaway of the battery core can not be stopped.
Disclosure of Invention
The utility model provides an electricity core switching piece, power battery and electric motor car, this electricity core switching piece, power battery and electric motor car, wherein, the utmost point ear and the utmost point post of electric core can be connected to the electricity core switching piece, and in addition, this application can cause thermal runaway and when producing high-temperature gas at the outside short circuit of electric core, interior short circuit or overcharge etc. through the fuse wire, makes it triggers the automatic fusing of fuse wire to produce high-temperature gas, and then cuts off the electric loop before the inside positive negative pole of electric core, and then cuts off the production of heat source to avoid the emergence of electric core thermal runaway.
In order to achieve the above object, in a first aspect, the present invention provides a cell interposer, where the cell interposer includes a fuse, a first conductive part and a second conductive part, one end of the first conductive part is used to electrically connect with a tab, and the other end of the first conductive part extends along a height direction of a cell stack and is electrically connected with the second conductive part;
and the fuse wire is arranged between the first conductive part and the second conductive part, wherein one end of the fuse wire is electrically connected with the first conductive part, the other end of the fuse wire is electrically connected with the second conductive part, and the second conductive part is also used for being connected with the battery cell pole.
In the first aspect of the application, through first conductive part and second conductive part, and then the utmost point ear of electric core can with the utmost point post electric connection of electric core, in addition, because fuse and first conductive part and second conductive part electric connection, so, when high-temperature gas triggered fuse fusing, first conductive part and second conductive part do not switch on, and then can cut off the electric return circuit before the inside positive negative pole of electric core, and then can avoid continuing to energize to electric core, and then can cut off the production of heat source, thereby avoid the emergence of electric core thermal runaway.
Compared with the prior art, the electric core keysets that electric core structure adopted among the prior art does not have the fuse, consequently, and it causes thermal runaway and when producing high temperature gas at the outside short circuit of electric core, interior short circuit or overcharge etc. and electrical return circuit can't be cut off the very first time to aggravate the thermal runaway of electric core, consequently comparatively speaking, the electric core keysets of this application has higher security and reliability.
In an alternative embodiment, the first conductive portion is integrally formed with the fusible link, the second conductive portion, and the post.
In an optional embodiment, the first conductive part, the fuse wire, the second conductive part and the pole are integrally molded, so that the first conductive part, the fuse wire, the second conductive part and the pole can be assembled and connected conveniently.
In an alternative embodiment, the second conductive part includes a first connection part and a second connection part, wherein the first connection part is parallel to the height direction of the cell lamination, and the second connection part forms a 90 ° corner with the first connection part and is parallel to the top cover of the cell.
In this optional embodiment, by disposing a connection portion parallel to the height direction of the cell stack, and disposing the second connection portion and the first connection portion to form a 90 ° corner and be parallel to the top cover of the cell, it is possible to facilitate connection of the second conductive portion and the first conductive portion and the fuse extending in the height direction of the cell stack, and to facilitate connection of the second conductive portion and the top cover of the cell.
In an optional embodiment, the pole includes an annular clamping groove, and the annular clamping groove is used for being connected with a top cover of the battery cell.
In this optional embodiment, the terminal post may be connected to the top cap of the battery cell through the annular clamping groove.
In an alternative embodiment, the fusible link is made of one of brass, red copper and silver.
In an alternative embodiment, the fusible link is made of an aluminum plate.
In an alternative embodiment, the fuse wire is made of one of antimony-lead alloy and tin-lead alloy.
In an alternative embodiment, the first conductive portion includes mounting holes for connection with tabs.
In this alternative embodiment, the first conductive portion may be connected to the tab through the mounting hole.
In a second aspect, the invention provides a power battery, which includes a top cap, a cell stack, a tab, a pole and the cell transition piece according to any one of the foregoing embodiments, wherein the cell stack, the stack hard shell, and the cell stack are mounted in a mounting cavity formed by the stack hard shell, the tab is connected to the cell stack and extends out of the stack hard shell to be electrically connected to a first conductive portion of the cell transition piece, a second conductive portion of the cell transition piece is electrically connected to the pole, the top cap is located on the top of the stack hard shell, and the pole is connected to the top cap.
Because the power battery of this application second aspect includes the electric core keysets of this application first aspect, consequently, compare with prior art, the power battery of this application can realize when high-temperature gas triggers the fuse to melt, first conductive part and second conductive part do not switch on, and then can cut off the electric return circuit before the inside positive negative pole of electric core, and then can avoid continuing to circular telegram to electric core, and then can cut off the production of heat source, thereby avoid the emergence of electric core thermal runaway, finally have higher security and reliability.
In a third aspect, the invention provides an electric vehicle comprising a power battery as described in the previous embodiments.
Because the electric motor car of this application third aspect includes the power battery of this application third aspect, consequently, compare with prior art, the electric motor car of this application can realize when high-temperature gas triggers the fuse to melt, first conductive part and second conductive part do not switch on, and then can cut off the electric return circuit before the inside positive negative pole of electric core, and then can avoid continuing to circular telegram to electric core, and then can cut off the production of heat source, thereby avoid the emergence of electric core thermal runaway, finally have higher security and reliability.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a cell interposer disclosed in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another cell interposer disclosed in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another cell interposer disclosed in an embodiment of the present application;
icon: 1-a first conductive portion; 2-a second conductive portion; 3-fusing the filaments; 4-mounting holes; 5-an annular clamping groove; 300-pole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally 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 application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, fig. 2, and fig. 3, fig. 1 is a schematic structural diagram of a cell interposer disclosed in an embodiment of the present application, fig. 2 is a schematic structural diagram of another cell interposer disclosed in the embodiment of the present application, and fig. 3 is a schematic structural diagram of another cell interposer disclosed in the embodiment of the present application. As shown in fig. 1, fig. 2, and fig. 3, the cell interposer according to the embodiment of the present application includes a fuse 3, a first conductive part 1, and a second conductive part 2, where one end of the first conductive part 1 is used to electrically connect with a tab, and the other end of the first conductive part 1 extends along a height direction of the cell stack and is electrically connected with the second conductive part 2;
and the fuse wire 3 is arranged between the first conductive part 1 and the second conductive part 2, wherein one end of the fuse wire 3 is electrically connected with the first conductive part 1, the other end of the fuse wire 3 is electrically connected with the second conductive part 2, and the second conductive part 2 is also used for being connected with the battery cell pole 300.
In the embodiment of the application, through the first conductive part 1 and the second conductive part 2, and then the tab of the battery cell can be electrically connected with the pole 300 of the battery cell, and in addition, because the fuse 3 is electrically connected with the first conductive part 1 and the second conductive part 2, thus, when the fuse 3 is triggered by high-temperature gas to fuse, the first conductive part 1 and the second conductive part 2 are not conducted, and then the electrical circuit before the positive pole and the negative pole inside the battery cell can be cut off, and then the continuous energization of the battery cell can be avoided, and further the generation of a heat source can be cut off, so that the occurrence of thermal runaway of the battery cell is avoided.
Compared with the prior art, the electric core switching piece that the electric core structure among the prior art adopted does not have fuse 3, consequently, and it causes thermal runaway and when producing high temperature gas at the outside short circuit of electric core, interior short circuit or overcharge etc. and electrical return circuit can't be cut off the very first time to aggravate the thermal runaway of electric core, consequently comparatively speaking, the electric core switching piece of this application has higher security and reliability.
In an alternative embodiment, the first conductive part 1 is integrally formed with the fuse 3, the second conductive part 2, and the post 300.
In an alternative embodiment, the first conductive part 1 is integrally formed with the fuse 3, the second conductive part 2, and the post 300, thereby facilitating assembly and connection between the first conductive part 1 and the fuse 3, the second conductive part 2, and the post 300.
In an alternative embodiment, the second conductive part 2 comprises a first connection portion and a second connection portion, wherein the first connection portion is parallel to the height direction of the cell lamination, and the second connection portion forms a 90 ° corner with the first connection portion and is parallel to the top cover of the cell.
In this optional embodiment, by arranging the connecting portion to be parallel to the height direction of the cell lamination, and arranging the second connecting portion to form a 90 ° corner with the first connecting portion and to be parallel to the top cover of the cell, it is possible to facilitate connecting the second conductive portion 2 with the first conductive portion 1 and the fuse 3 extending in the height direction of the cell lamination, and it is also possible to facilitate connecting the second conductive portion 2 with the top cover of the cell.
In an alternative embodiment, the pole 300 includes a ring-shaped slot 5, and the ring-shaped slot 5 is used for connecting with a top cover of the battery cell.
In this optional embodiment, the pole 300 may be connected to the top cover of the battery cell through the ring-shaped slot 5.
In an alternative embodiment, the fusible link 3 is made of one of brass, red copper, and silver.
In an alternative embodiment, the fuse wire 3 is made of an aluminum plate.
In an alternative embodiment, the fuse wire 3 is made of one of antimony-lead alloy and tin-lead alloy.
In an alternative embodiment, the first conductive part 1 comprises mounting holes 4, the mounting holes 4 being for connection with tabs.
In this alternative embodiment, the first conductive portion 1 can be connected to the tab through the mounting hole 4.
In addition, as shown in fig. 2, the power battery of the embodiment of the present application further includes a top cap, a cell lamination, a tab, a pole 300, and a cell interposer as in any one of the foregoing embodiments, where the cell lamination, the lamination hardshell, and the cell lamination are mounted in a mounting cavity formed by the lamination hardshell, the tab is connected to the cell lamination and extends out of the lamination hardshell to be electrically connected to the first conductive portion 1 of the cell interposer, the second conductive portion 2 of the cell interposer is electrically connected to the pole 300, the top cap is located at the top of the lamination hardshell, and the pole 300 is connected to the top cap.
Because the power battery of this application embodiment includes the electric core keysets of this application embodiment, consequently, compare with prior art, the power battery of this application can realize when high-temperature gas triggers fusing 3 fuses, first conductive part 1 does not switch on with second conductive part 2, and then can cut off the electric return circuit before the inside positive negative pole of electric core, and then can avoid continuing to circular telegram to electric core, and then can cut off the production of heat source, thereby avoid the emergence of electric core thermal runaway, finally have higher security and reliability.
In addition, the embodiment of the application also provides an electric vehicle which comprises the power battery of the previous embodiment.
Because the electric vehicle of the embodiment of the application includes the power battery of the embodiment of the application, compared with the prior art, the electric vehicle of the application can realize that when the fuse 3 fuses when high-temperature gas triggers, the first conductive part 1 is not conducted with the second conductive part 2, so that an electric loop in front of a positive pole and a negative pole in the battery cell can be cut off, further the battery cell can be prevented from being continuously electrified, further the generation of a heat source can be cut off, further the occurrence of thermal runaway of the battery cell is avoided, and finally higher safety and reliability are achieved.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A cell patch is characterized by comprising a fuse wire, a first conductive part and a second conductive part, wherein one end of the first conductive part is used for being electrically connected with a lug, and the other end of the first conductive part extends along the height direction of a cell lamination and is electrically connected with the second conductive part;
and the fuse wire is arranged between the first conductive part and the second conductive part, wherein one end of the fuse wire is electrically connected with the first conductive part, the other end of the fuse wire is electrically connected with the second conductive part, and the second conductive part is also used for being connected with the battery cell pole.
2. The cell interposer as recited in claim 1, wherein the first conductive portion is integrally formed with the fusible link, the second conductive portion, and the terminal.
3. The cell interposer of claim 1, wherein the second conductive portion comprises a first connection portion and a second connection portion, wherein the first connection portion is parallel to the cell stack height direction, and wherein the second connection portion forms a 90 ° corner with the first connection portion and is parallel to a top cover of the cell.
4. The cell interposer of claim 3, wherein the terminal post comprises an annular groove for connection with a top cap of the cell.
5. The cell interposer as recited in claim 1, wherein the fusible link is made of one of brass, copper, and silver.
6. The cell interposer as recited in claim 1, wherein the fuse wire is made of an aluminum plate.
7. The cell interposer as recited in claim 1, wherein the fuse wire is made of one of antimony-lead alloy and tin-lead alloy.
8. The cell interposer as recited in claim 1, wherein the first conductive portion includes mounting holes for connection with tabs.
9. A power battery, characterized in that, power battery includes top cap, electric core lamination, utmost point ear, utmost point post and according to the electric core keysets of any of claims 1-8, wherein, electric core lamination, lamination crust, the electric core lamination install in the installation cavity that lamination crust formed, utmost point ear with the electric core lamination is connected and extends from the lamination crust, in order to with the first conductive part electric connection of electric core keysets, the second conductive part of electric core keysets with utmost point post electric connection, the top cap is located the top of lamination crust, utmost point post with the top cap is connected.
10. An electric vehicle characterized by comprising the power battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210822469.8A CN114976511A (en) | 2022-07-13 | 2022-07-13 | Electricity core switching piece, power battery and electric motor car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210822469.8A CN114976511A (en) | 2022-07-13 | 2022-07-13 | Electricity core switching piece, power battery and electric motor car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114976511A true CN114976511A (en) | 2022-08-30 |
Family
ID=82969831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210822469.8A Pending CN114976511A (en) | 2022-07-13 | 2022-07-13 | Electricity core switching piece, power battery and electric motor car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114976511A (en) |
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2022
- 2022-07-13 CN CN202210822469.8A patent/CN114976511A/en active Pending
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