Current collector, battery and electric device

Abstract

The application discloses a current collecting plate, a battery and an electric device, and relates to the technical field of batteries. The current collecting plate comprises a main plate body, a connecting piece and at least one interconnecting piece. The main plate body has a first surface and a second surface on opposite surfaces in the thickness direction. The first surface of the main plate body is used for connecting a battery cell. The connecting piece is arranged close to the second surface of the main plate body and is used for connecting a shell or a pole of the battery. The interconnecting piece is connected between the main plate body and the connecting piece. The interconnecting piece comprises a hot melting portion. The hot melting portion has a thermal failure temperature. When the temperature of the hot melting portion is greater than the thermal failure temperature, the interconnecting piece is disconnected at the hot melting portion. The current collecting plate can reduce or avoid the safety risk caused by the overheating of the battery cell.

Description

Collector, battery and electrical device Technical Field

[0001] This invention relates to the field of battery technology, specifically to a current collector, a battery, and an electrical device. Background Technology

[0002] As batteries are increasingly used in electric bicycles, electric vehicles, and large-scale energy storage power stations, the industry is placing increasingly higher demands on battery specifications, technical performance, and reliability. However, factors such as internal short circuits and overheating of the battery cells due to prolonged use can easily lead to safety risks such as battery expansion, combustion, or explosion due to excessively high internal temperatures. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a current collector that can reduce or avoid safety risks such as expansion, combustion, or explosion caused by overheating of the battery cell.

[0004] The present invention also proposes a battery having the above-mentioned current collector.

[0005] The present invention also proposes an electrical device having the above-mentioned battery.

[0006] According to an embodiment of the present invention, a current collector includes: a main plate body, the main plate body having a first surface and a second surface on opposite sides along its thickness direction, the first surface of the main plate body being used to connect a battery cell; a connector, the connector being disposed near the second surface of the main plate body, the connector being used to connect a battery casing or a terminal post; and at least one interconnecting member, the interconnecting member being connected between the main plate body and the connector, the interconnecting member including a heat-fused portion, the heat-fused portion having a thermal failure temperature, and the interconnecting member disconnecting at the heat-fused portion when the temperature of the heat-fused portion is greater than the thermal failure temperature.

[0007] According to an embodiment of the present invention, the current collector of the main disk body and the connector are connected by an interconnecting member, thereby achieving electrical conduction from the main disk body to the connector. The main disk body is in electrical contact with the battery cell, and the connector is in electrical contact with the casing or terminal. Electrical conduction between the battery cell and the casing or terminal is achieved through the current collector, that is, the current between the battery cell and the casing or terminal passes through the interconnecting member. A heat-sealing section is provided in the interconnecting member. When the current passing through the interconnecting member increases or the heat transferred from the battery cell to the interconnecting member increases, the temperature of the heat-sealing section gradually increases until the temperature of the heat-sealing section exceeds the thermal failure temperature, causing the interconnecting member to disconnect at the heat-sealing section. This disconnects the electrical conduction between the main disk body and the connector, achieving current interruption between the battery cell and the casing or terminal. This prevents the temperature of the conductive path between the battery cell and the casing or terminal from further increasing, reducing or avoiding safety risks such as expansion, combustion, or explosion caused by overheating of the battery cell, and improving the safety of battery use.

[0008] In some embodiments, the thermal failure temperature is greater than or equal to 150°C.

[0009] In some embodiments, the number of interconnecting elements is a plurality of spaced-apart interconnecting elements, and the minimum spacing between two adjacent interconnecting elements is less than or equal to 10 mm.

[0010] In some embodiments, the volume of the interconnect component accounts for 0.04%-2% of the volume of the manifold.

[0011] In some embodiments, the width of the interconnect is 1mm-15mm.

[0012] In some embodiments, the interconnect includes a bent section, the main disc includes a bent portion, the bent section connects the bent portion and the heat-fused portion; and notches are provided on both sides of the bent portion on the edge of the main disc.

[0013] In some embodiments, the main plate has a through positioning hole at its center for coaxial arrangement with the battery cell.

[0014] In some embodiments, the connector is provided with at least one first through hole, and the main body is provided with at least one second through hole.

[0015] Furthermore, the ratio of the diameter of the first through hole to the diameter of the second through hole is 1:(0.2-5).

[0016] Furthermore, there are multiple second through holes, which are arranged at intervals along the circumference of the main disk.

[0017] Furthermore, the main disc body has a plurality of raised ribs formed on the first surface, and at least two of the raised ribs form a recessed platform on the side facing the center of the main disc body, and the second through hole is located in the recessed platform.

[0018] Furthermore, there are multiple sinking platforms arranged radially, and each sinking platform is provided with the second through hole.

[0019] In some embodiments, the main plate has a plurality of raised ribs formed on the first surface, the raised ribs forming a welding area for welding the battery cell.

[0020] Furthermore, the main disc body has a groove formed on the second surface corresponding to the rib.

[0021] In some embodiments, the manifold is a stamped part, and the main disc body, the connector, and the interconnecting part are integrally formed parts.

[0022] According to an embodiment of the present invention, a battery includes: a housing, wherein a receiving cavity is provided inside the housing; a battery cell, wherein the battery cell is disposed within the receiving cavity; and a current collector as described in the above embodiment, wherein the main plate is connected to the battery cell, and the connector is connected to the housing.

[0023] According to the battery of the present invention, by employing the current collector of the above-described embodiment, the current collector connects the main plate body and the connector through interconnecting members, realizing electrical conduction from the main plate body to the connector. The main plate body is in electrical contact with the battery cell, and the connector is in electrical contact with the casing or terminal. Electrical conduction between the battery cell and the casing or terminal is achieved through the current collector, that is, the current between the battery cell and the casing or terminal passes through the interconnecting member. A heat-sealing section is provided in the interconnecting member. When the current passing through the interconnecting member increases or the heat transferred from the battery cell to the interconnecting member increases, the temperature of the heat-sealing section gradually increases until the temperature of the heat-sealing section exceeds the thermal failure temperature, causing the interconnecting member to disconnect at the heat-sealing section. This disconnects the electrical conduction between the main plate body and the connector, realizing the interruption of current between the battery cell and the casing or terminal, thereby preventing the temperature of the conductive path between the battery cell and the casing or terminal from further increasing, reducing or avoiding safety risks such as expansion, combustion, or explosion caused by overheating of the battery cell, and improving the safety of battery use.

[0024] An electrical device according to an embodiment of the present invention includes the battery described in the above embodiment.

[0025] According to the embodiments of the present invention, by using the battery of the above embodiments, the electrical device can reduce or avoid safety risks such as expansion, combustion or explosion caused by overheating of the battery cell, thereby improving the safety of battery use.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 is a three-dimensional structural diagram of the collector disk according to an embodiment of the present invention;

[0029] Figure 2 is a top view of the collector plate in the embodiment shown in Figure 1;

[0030] Figure 3 is a side view of the collector disk in the embodiment shown in Figure 1;

[0031] Figure 4 is a schematic diagram of the enlarged structure shown at point A in Figure 3;

[0032] Figure 5 is a schematic diagram of the structure of the collector plate according to an embodiment of the present invention.

[0033] Figure label:

[0034] 100-level manifold

[0035] Main body 10, first surface 10a, second surface 10b

[0036] 11. Bending section; 12. Notch; 13. Positioning hole; 14. Second through hole; 15. Rib; 16. Countersunk platform; 17. Welding area; 18. Groove.

[0037] Connector 20, First through hole 21

[0038] Interconnector 30, heat-fused part 31, bending section 32. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "bottom," "inner," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The current collector 100, battery, and power supply device according to embodiments of the present invention are described below with reference to the accompanying drawings.

[0043] As shown in Figures 1-3, the current collector 100 according to an embodiment of the present invention includes: a main plate body 10, a connector 20, and at least one interconnecting member 30. The main plate body 10 has two opposite surfaces along its thickness direction, a first surface 10a and a second surface 10b. The first surface 10a of the main plate body 10 is used to connect a battery cell. The connector 20 is disposed near the second surface 10b of the main plate body 10 and is used to connect a battery casing or terminal post. The interconnecting member 30 connects the main plate body 10 and the connector 20. The interconnecting member 30 includes a heat-fused portion 31, which has a thermal failure temperature. When the temperature of the heat-fused portion 31 exceeds the thermal failure temperature, the interconnecting member 30 disconnects at the heat-fused portion 31.

[0044] It is understandable that the main disk body 10, the connector 20 and the interconnection component 30 are all conductive components. When current flows through the current collector 100, the heat generated by the current collector 100 gradually increases with the increase of the current, that is, the temperature of the current collector 100 increases with the increase of the current.

[0045] The current collector 100 of this application connects the main plate 10 and the connector 20 via an interconnect 30, enabling electrical conduction from the main plate 10 to the connector 20. The main plate 10 is in electrical contact with the battery cell, and the connector 20 is in electrical contact with the casing or terminal. Electrical conduction between the battery cell and the casing or terminal is achieved through the current collector 100, meaning the current between the battery cell and the casing or terminal passes through the interconnect 30. A heat-sealing section 31 is provided in the interconnect 30. When the current passing through the interconnect 30 increases or the heat transferred from the battery cell to the interconnect 30 increases, the temperature of the heat-sealing section 31 gradually increases until it exceeds the thermal failure temperature, causing the interconnect 30 to disconnect at the heat-sealing section 31. This disconnects the electrical conduction between the main plate 10 and the connector 20, thus interrupting the current flow between the battery cell and the casing or terminal. This prevents further temperature increases in the conductive path between the battery cell and the casing or terminal, reducing or avoiding safety risks such as expansion, combustion, or explosion caused by overheating of the battery cell, and improving the safety of battery use.

[0046] It should be noted that during the installation of the current collector 100, the connector 20 is first connected to the battery casing or terminal, and then the main plate 10 is connected to the battery cell.

[0047] It should be noted that the factors that cause the temperature of the hot-melt section 31 to reach the thermal failure temperature are not limited. For example, a short circuit within the battery can cause a sudden increase in the current flowing through the current collector 100, leading to a rapid rise in the temperature of the hot-melt section 31. Alternatively, prolonged use of the battery can cause cell aging, making the cells prone to heat generation and increasing the overall battery temperature. When this heat is conducted to the current collector 100, it can cause the temperature of the hot-melt section 31 to rise. In this case, the hot-melt section 31 disconnects, providing power-off protection for the cells and reducing or preventing further heating. Furthermore, excessively high ambient temperatures can cause the cells or current collector 100 to overheat.

[0048] In this application, the location of the heat-fused portion 31 on the interconnecting member 30 is not limited. For example, the cross-sectional area of ​​all portions of the interconnecting member 30 between the two ends of the main disk body 10 and the connector 20 is the same, and the heat-fused portion 31 is formed in all portions of the interconnecting member 30 between the two ends of the main disk body 10 and the connector 20.

[0049] Preferably, the connector 20 is located on one side of the surface of the main disk 10 and spaced apart from the second surface 10b, so that the main disk 10 and the connector 20 are spaced apart, ensuring that there is no direct electrical contact between the main disk 10 and the connector 20. The main disk 10 and the connector 20 are electrically connected through the interconnecting member 30. When the interconnecting member 30 is disconnected, the electrical conduction between the main disk 10 and the connector 20 is interrupted.

[0050] In some embodiments, the main disk 10, the connector 20, and the interconnecting member 30 are made of the same material, and the flow area of ​​the interconnecting member 30 at least in the hot melt section 31 is smaller than the flow area of ​​the main disk 10 and the connector 20.

[0051] It is understandable that the current intensity passing through the main disk 10, interconnect 30, and connector 20 is the same. However, the current-carrying area of ​​interconnect 30 is smaller than that of the main disk 10 and connector 20, which makes the resistance of interconnect 30 in the hot melt section 31 greater than that of the main disk 10 and connector 20.

[0052] Therefore, when current is conducted in the main disk 10, interconnect 30 and connector 20, assuming that the main disk 10, connector 20 and interconnect 30 are made of the same material, the temperature rises fastest at the hot melt section 31 with the highest resistance. That is, the temperature of the hot melt section 31 is greater than the temperature of the main disk 10 and connector 20. When the temperature of the hot melt section 31 reaches the thermal failure temperature, the interconnect 30 is disconnected at the hot melt section 31. At this time, the temperature of the main disk 10 and connector 20 is lower than the thermal failure temperature. Thus, when the battery overheats and causes a safety risk, the interconnect 30 can be disconnected at the hot melt section 31, ensuring the current interruption protection effect of the current collector 100 at the hot melt section 31 when the battery overheats.

[0053] Preferably, the interconnecting element 30, the connector 20, and the main disk body 10 have the same thickness, and the width of the interconnecting element 30 is 0.1mm-2mm.

[0054] In some embodiments, the main disk 10 is welded to the battery cell, and the connector 20 is welded to the battery casing or battery cell, which can ensure the stability of the connection between the main disk 10 and the battery cell, as well as between the connector 20 and the battery casing or battery cell.

[0055] In some embodiments, the interconnecting member 30 is made of a low-melting-point material at least in the heat-fused part 31, while the main disk body 10 and the connector 20 are made of a high-melting-point material. This makes the thermal failure temperature of the heat-fused part 31 lower than the temperature at which the battery overheats. As a result, when the battery temperature is too high and a safety risk arises, the heat-fused part 31 with a lower thermal failure temperature can be disconnected, thereby ensuring the current-cutting protection effect of the current collector 100 on the battery overheating when the heat-fused part 31 is in use.

[0056] In some embodiments, the thermal failure temperature is greater than or equal to 150°C, so that when the temperature of the heat-fused part 31 is greater than or equal to 150°C, the interconnect 30 is disconnected at the heat-fused part 31, ensuring the safety of battery use.

[0057] In some embodiments, the number of interconnecting elements 30 is a plurality of spaced interconnecting elements 30, with the minimum spacing between two adjacent interconnecting elements 30 being less than or equal to 10 mm. This improves the current load capacity between the main disk 10 and the connector 20, and the multiple interconnecting elements 30 can distribute the current carrying capacity, reducing the heat generated by the interconnecting elements 30.

[0058] In some embodiments, the volume of the interconnect 30 accounts for 0.04%-2% of the volume of the manifold 100. Thus, while meeting the current carrying capacity and fusing requirements of the interconnect 30, material costs can be saved and the manufacturing cost of the manifold 100 can be reduced.

[0059] In some embodiments, the width of the interconnect 30 is 1mm-15mm. Thus, with this width, the interconnect 30 can effectively melt and break at the thermal failure temperature while meeting the current carrying capacity.

[0060] It should be noted that when the number of interconnecting components 30 is multiple and spaced apart, the width of each interconnecting component 30 is 1mm-15mm.

[0061] In some embodiments, as shown in Figures 1, 2, and 5, the interconnect 30 includes a bent section 32, and the main disk body 10 includes a bent portion 11. The bent section 32 connects the bent portion 11 and the heat-fused portion 31. Notches 12 are respectively provided on both sides of the bent portion 11 on the edge of the main disk body 10.

[0062] It is understandable that the position of the main plate 10 corresponds to the cell setting, and the position of the connector 20 corresponds to the housing or terminal setting. However, due to differences in battery size or deviations in installation position, the relative positions of the main plate 10 and the connector 20 are prone to change.

[0063] Therefore, the interconnecting component 30 is connected to the bending portion 11 of the main disk body 10 at the bending section 32, so that the interconnecting component 30 can be bent relative to the main disk body 10. By adjusting the bending degree of the interconnecting component 30, the relative position of the main disk body 10 and the connecting component 20 can be adjusted. Thus, when the relative position of the main disk body 10 and the connecting component 20 changes, the interconnecting component 30 can adjust its bending degree accordingly, ensuring that the two ends of the interconnecting component 30 can be stably connected to the main disk body 10 and the connecting component 20 respectively, and the electrical connection stability between the main disk body 10 and the connecting component 20 is ensured by the interconnecting component 30.

[0064] At the same time, it enables the current collector to be used in batteries of different sizes, improving the versatility of the current collector.

[0065] In addition, the main body 10 has notches 12 on both sides of the bending portion 11 on the edge, which can reduce or avoid the main body 10 itself from blocking the bending of the bending portion 11, so as to ensure the stable bending cooperation between the main body 10 and the bending section 32 of the interconnecting member 30 at the bending portion 11.

[0066] In some embodiments, as shown in Figures 2 and 5, a through positioning hole 13 is provided at the center of the main disk body 10 for coaxial arrangement with the battery cell.

[0067] It is understandable that when the main plate 10 is connected to the battery cell, the main plate 10 will obstruct the view of the battery cell, making it difficult to determine the position of the main plate 10 relative to the battery cell.

[0068] Therefore, the positioning hole 13 passes through the main plate 10. When the main plate 10 is connected to the battery cell, the position of the main plate 10 relative to the battery cell can be observed through the positioning hole 13. At the same time, the positioning hole 13 is used to position the main plate 10 at the battery cell connection position, thereby reducing or avoiding deviation of the main plate 10 at the battery cell connection position and ensuring the stability of the electrical contact between the main plate 10 and the battery cell.

[0069] Furthermore, when the battery cell is a wound core, the wound core has a hollow shaft extending along the axial direction, and the positioning hole 13 is coaxially arranged with the hollow shaft.

[0070] In some embodiments, as shown in Figures 1-3, the connector 20 is provided with at least one first through hole 21, and the main body 10 is provided with at least one second through hole 14.

[0071] Understandably, after the connector 20 is connected to the battery casing or terminal, the main plate 10 is connected to the cell, and the casing or terminal is installed in the battery, electrolyte needs to be injected into the battery.

[0072] Therefore, the electrolyte injected into the battery from the casing or terminals can flow to the battery cell through the first through hole 21 and the second through hole 14, thereby realizing the injection of electrolyte into the battery. At the same time, the electrolyte can flow through the second through hole 14 on both sides of the main plate 10, ensuring that the electrolyte can flow fully into the battery cell.

[0073] Preferably, during electrolyte injection, the electrolyte mainly flows to the cell through the first through-hole 21, while the second through-hole 14 supplements the electrolyte injection into the battery. Heat inside the battery is mainly transferred to the outside through the second through-hole 14; that is, the second through-hole 14 is primarily used for heat dissipation inside the battery.

[0074] Furthermore, the ratio of the diameter of the first through hole 21 to the diameter of the second through hole 14 is 1:(0.2-5). This ensures the flow efficiency of the electrolyte within the first through hole 21 and the second through hole 14, as well as the heat dissipation efficiency of the battery through the second through hole 14.

[0075] It should be noted that, depending on the shape of the first through hole 21 and the second through hole 14, the diameter of the first through hole 21 and the diameter of the second through hole 14 refer to different things. For example, when the first through hole 21 and the second through hole 14 are circular, their diameter is the diameter. Another example is when the first through hole 21 and the second through hole 14 are rectangular, their diameter is the length of the rectangle. Yet another example is when the first through hole 21 and the second through hole 14 are elliptical, their diameter is the major axis of the ellipse.

[0076] Furthermore, there are multiple second through holes 14, which are arranged at intervals along the circumference of the main disk 10. Thus, the multiple second through holes 14 can be used at different positions along the circumference of the main disk 10 for electrolyte flow and heat dissipation inside the battery, improving battery heat dissipation efficiency and electrolyte flow efficiency.

[0077] Furthermore, the main plate 10 forms a plurality of ribs 15 on the first surface 10a, and at least two ribs 15 are connected on the side facing the center of the main plate 10 to form a recessed platform 16, and the second through hole 14 is located in the recessed platform 16.

[0078] It is understandable that when the main plate 10 is connected to the end of the cell, at least part of the surface of the cell end face is in contact with the main plate 10.

[0079] Therefore, by providing a rib 15 on the first surface 10a of the main disk body 10, when the main disk body 10 is connected to the battery cell, the rib 15 can abut against the battery cell, thereby forming a flow space for electrolyte between the sink 16 and the end face of the battery cell, allowing the electrolyte to flow between the main disk body 10 and the end face of the battery cell, improving the flow efficiency of the electrolyte in the battery, and ensuring the wetting effect of the electrolyte on the battery cell.

[0080] Preferably, the rib 15 protrudes 0.1mm-1mm above the first surface 10a.

[0081] Furthermore, there are multiple recessed platforms 16 arranged radially, and each recessed platform 16 is provided with a second through hole 14. As a result, the electrolyte can flow radially across the battery end face through the multiple recessed platforms 16, allowing the electrolyte to flow into the cell from different positions on the battery end face, further improving the flow efficiency of the electrolyte in the battery and ensuring the wetting effect of the electrolyte on the cell.

[0082] In some embodiments, as shown in Figures 3 and 4, the main disk body 10 forms a plurality of ribs 15 on the first surface 10a, and the ribs 15 form a welding area 17 for welding the battery cell.

[0083] It is understandable that when the main body 10 is attached to the first surface 10a and the end face of the battery cell, the unevenness of the end face of the battery cell can easily cause gaps in some areas between the first surface 10a and the end face of the battery cell, affecting the welding effect between the end face of the battery cell and the first surface 10a.

[0084] Therefore, the main plate 10 is welded to the battery cell in the welding area 17, and the contact area between the main plate 10 and the end face of the battery cell through the rib 15 is small, which can improve the tightness of the main plate 10 in the welding area 17 at the end face of the battery cell, thereby improving the firmness of the welding of the main plate 10 in the welding area 17 at the end face of the battery cell.

[0085] Furthermore, the main disk body 10 has a groove 18 formed on the second surface 10b corresponding to the rib 15. Thus, the rib 15 can be formed by stamping, which simplifies the process required to form the rib 15, eliminates the need to cut the main disk body 10, and allows for a smaller thickness of the main disk body 10, thereby reducing the material and process costs of the main disk body 10.

[0086] In some embodiments, as shown in FIG5, the manifold 100 is a stamped part, and the main disk body 10, the connector 20, and the interconnecting part 30 are integrally formed parts. As a result, the manufacturing process of the manifold 100 can be simplified, eliminating the need for cutting the manifold 100, and the thickness of the manifold 100 can be reduced, thereby lowering the material cost and process cost of the manifold 100.

[0087] Furthermore, the interconnecting component 30 includes a bent section 32, and the main body 10 includes a bent portion 11, with the bent section 32 connected to the bent portion 11.

[0088] It is understandable that the current collector 100 is flat after being stamped. When the current collector 100 is installed into the battery, the connector 20 needs to be located on one side of the second surface 10b of the main plate body 10, and the connector 20 is spaced apart from the second surface 10b of the main plate body 10.

[0089] Thus, the main disk body 10 and the connector 20 can be bent through the bending portion 11 and the bending section 32, so that the position of the connector 20 relative to the main disk body 10 is adjustable, and the interconnecting member 30 is connected to the main disk body 10 and the connector 20 at both ends respectively, so that the connector 20 can be located on one side of the second surface 10b of the main disk body 10, and the connector 20 is spaced apart from the second surface 10b of the main disk body 10.

[0090] According to an embodiment of the present invention, a battery includes: a casing, a battery cell, and a current collector 100 as described in the above embodiment. A receiving cavity is provided inside the casing, the battery cell is disposed within the receiving cavity, the main disk 10 of the current collector 100 is connected to the battery cell, and a connector 20 is connected to the casing.

[0091] The battery of this application adopts the current collector 100 of the above embodiment. The current collector 100 connects the main disk body 10 and the connector 20 by setting the interconnecting member 30, so as to realize the electrical conduction from the main disk body 10 to the connector 20. The main disk body 10 is in electrical contact with the battery cell, and the connector 20 is in electrical contact with the shell or the terminal. The battery cell and the shell or the terminal are electrically connected through the current collector 100, that is, the current between the battery cell and the shell or the terminal passes through the interconnecting member 30. The interconnect 30 is provided with a heat-fused section 31. When the current through the interconnect 30 increases or the heat transferred from the cell to the interconnect 30 increases, the temperature of the heat-fused section 31 gradually increases until the temperature of the heat-fused section 31 exceeds the thermal failure temperature, causing the interconnect 30 to disconnect at the heat-fused section 31. This disconnects the electrical conduction between the main disk 10 and the connector 20, thereby interrupting the current flow between the cell and the casing or terminal. This prevents the temperature of the conductive path between the cell and the casing or terminal from rising further, reducing or avoiding safety risks such as expansion, combustion, or explosion caused by overheating of the cell, and improving the safety of battery use.

[0092] An electrical device according to an embodiment of the present invention includes the battery described in the above embodiment.

[0093] The electrical device of this application, by employing the battery of the above embodiment, can reduce or avoid safety risks such as expansion, combustion or explosion caused by overheating of the battery cell, thereby improving the safety of battery use.

[0094] Other configurations and operations of the current collector 100, battery, and power supply device according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0095] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0096] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A collector disk, characterized in that, include: The main disk body (10) has a first surface (10a) and a second surface (10b) on opposite sides along its thickness direction. The first surface (10a) of the main disk body (10) is used to connect the battery cell. A connector (20) is disposed near the second surface (10b) of the main disk body (10) and is used to connect the battery casing or terminals. At least one interconnecting member (30) is connected to the main disk body (10a). Between 10) and the connector (20), the interconnect (30) includes a heat-fused portion (31) having a thermal failure temperature, and the interconnect (30) disconnects at the heat-fused portion (31) when the temperature of the heat-fused portion (31) is greater than the thermal failure temperature; the interconnect (30) includes a bent section (32), and the main disk body (10) includes a bent portion (11), the bent section (32) connecting the bent portion (11) and the heat-fused portion (31).

2. The collector disk according to claim 1, characterized in that, The thermal failure temperature is greater than or equal to 150°C.

3. The collector disk according to claim 1, characterized in that, The number of interconnecting elements (30) is a plurality of spaced-out interconnecting elements (30), and the minimum spacing between two adjacent interconnecting elements (30) is less than or equal to 10 mm.

4. The collector disk according to claim 1, characterized in that, The volume of the interconnect (30) accounts for 0.04%-2% of the volume of the collector disk.

5. The collector disk according to claim 1, characterized in that, The width of the interconnecting element (30) is 1mm-15mm.

6. The collector disk according to claim 1, characterized in that, Notches (12) are provided on both sides of the bend (11) on the edge of the main body (10).

7. The collector disk according to claim 1, characterized in that, The main plate (10) has a through positioning hole (13) at its center for being coaxially arranged with the battery cell.

8. The collector disk according to claim 1, characterized in that, The connector (20) is provided with at least one first through hole (21), and the main body (10) is provided with at least one second through hole (14).

9. The collector disk according to claim 8, characterized in that, The ratio of the diameter of the first through hole (21) to the diameter of the second through hole (14) is 1:(0.2-5).

10. The collector disk according to claim 8, characterized in that, The number of the second through holes (14) is multiple, and the multiple second through holes (14) are arranged at intervals along the circumference of the main disk body (10).

11. The collector disk according to claim 10, characterized in that, The main plate (10) forms a plurality of ribs (15) on the first surface (10a), and at least two of the ribs (15) are connected on one side toward the center of the main plate (10) to form a recessed platform (16), and the second through hole (14) is located in the recessed platform (16).

12. The collector disk according to claim 11, characterized in that, The recessed platforms (16) are multiple and arranged radially, and each of the recessed platforms (16) is provided with the second through hole (14).

13. The collector disk according to claim 1, characterized in that, The main body (10) forms a plurality of raised ribs (15) on the first surface (10a), the raised ribs (15) forming a welding area (17) for welding the battery cell.

14. The collector disk according to claim 13, characterized in that, The main plate (10) has a groove (18) formed on the second surface (10b) corresponding to the rib (15).

15. The collector disk according to any one of claims 1-14, characterized in that, The collector plate is a stamped part, and the main plate body (10), the connector (20) and the interconnection part (30) are integrally formed parts.

16. A battery, characterized in that, include: A housing, wherein a receiving cavity is provided inside the housing; a battery cell, wherein the battery cell is disposed in the receiving cavity; a current collector as described in any one of claims 1-15, wherein the main disk body (10) is connected to the battery cell, and the connector (20) is connected to the housing.

17. An electrical appliance, characterized in that, Includes the battery as described in claim 16.

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