Collecting plate, battery and electric device

Abstract

The invention discloses a collector plate, a battery and an electric device, and relates to the technical field of batteries, and the collector plate comprises a main plate body, a connecting piece and at least one interconnecting piece. Two opposite surfaces of the main disc body along the thickness direction are a first surface and a second surface, and the first surface of the main disc body is used for connecting a battery cell. And the connecting piece is arranged close to the second surface of the main disc body and is used for connecting a shell or a pole of the battery. The interconnecting piece is connected between the main disc body and the connecting piece, the interconnecting piece comprises a hot melting part, the hot melting part has a thermal failure temperature, and the interconnecting piece is disconnected at the hot melting part when the temperature of the hot melting part is higher than the thermal failure temperature. According to the collector plate, the safety risk caused by overheating of the battery cell can be reduced or avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a current collecting plate, a battery and an electrical device. Background Art

[0002] As batteries are increasingly used in electric bicycles, electric vehicles and large energy storage power stations, the industry has put forward higher and higher requirements for battery specifications, technical performance and reliability. Under the influence of factors such as short circuits inside the battery and heating of the battery core caused by long-term use, it is easy to cause safety risks such as battery expansion, combustion or explosion due to excessive temperature inside the battery. Summary of the invention

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

[0004] The present invention also provides a battery having the current collecting plate.

[0005] The present invention also provides an electrical device having the battery.

[0006] According to an embodiment of the present invention, the current collecting disk includes: a main disk body, wherein two opposite surfaces of the main disk body in the thickness direction are a first surface and a second surface, and the first surface of the main disk body is used to connect the battery cell; a connecting member, wherein the connecting member is arranged near the second surface of the main disk body, and the connecting member is used to connect the battery shell or pole; at least one interconnecting member, wherein the interconnecting member is connected between the main disk body and the connecting member, and the interconnecting member includes a hot melt portion, wherein the hot melt portion has a thermal failure temperature, and when the temperature of the hot melt portion is greater than the thermal failure temperature, the interconnecting member is disconnected at the hot melt portion.

[0007] According to the current collector of the embodiment of the present invention, an interconnection is provided to connect the main disk body and the connection piece, so that electrical conduction from the main disk body to the connection piece is achieved, and the main disk body is in electrical contact with the battery cell, and the connection piece is in electrical contact with the shell or the pole, and the battery cell and the shell or the pole are electrically connected through the current collector, that is, the current between the battery cell and the shell or the pole passes through the interconnection. A hot melt portion is provided in the interconnection piece, and when the current passing through the interconnection piece increases or the heat transferred from the battery cell to the interconnection piece increases, the temperature of the hot melt portion gradually increases until the temperature of the hot melt portion is greater than the thermal failure temperature, so that the interconnection piece is disconnected at the hot melt portion, thereby disconnecting the electrical conduction between the main disk body and the connection piece, and realizing the interruption of current between the battery cell and the shell or the pole, so as to avoid further increase in the temperature of the conductive path between the battery cell and the shell or the pole, reduce or avoid the safety risks such as expansion, combustion or explosion caused by overheating of the battery cell, and improve 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 the interconnecting members is a plurality distributed at intervals, and the minimum spacing between two adjacent interconnecting members is less than or equal to 10 mm.

[0010] In some embodiments, the volume of the interconnection member accounts for 0.04%-2% of the volume of the collecting plate.

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

[0012] In some embodiments, the interconnecting member includes a bending section, the main disk body includes a bending portion, the bending section is connected between the bending portion and the hot melt portion; and notches are respectively arranged on the edge of the main disk body on both sides of the bending portion.

[0013] In some embodiments, a through positioning hole is provided at the center of the main disk body for being coaxially arranged with the battery core.

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

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

[0016] Furthermore, there are a plurality of the second through holes, and the plurality of the second through holes are arranged at intervals along the circumference of the main disk body.

[0017] Furthermore, the main disk body forms a plurality of convex ribs on the first surface, at least two of the convex ribs form a sink on the side facing the center of the main disk body, and the second through hole is located in the sink.

[0018] Furthermore, there are multiple sinks arranged in a radial pattern, and each of the sinks is provided with the second through hole.

[0019] In some embodiments, the main disk body forms a plurality of convex ribs on the first surface, and the convex ribs form welding areas for welding the battery core.

[0020] Furthermore, a groove is formed on the second surface of the main disk body corresponding to the convex rib.

[0021] In some embodiments, the collecting plate is a stamped part, and the main plate body, the connecting part and the interconnecting part are an integrally formed part.

[0022] The battery according to the embodiment of the present invention comprises: a shell, wherein a receiving cavity is arranged in the shell; a battery cell, wherein the battery cell is arranged in the receiving cavity; the current collecting disk described in the above embodiment, wherein the main disk body is connected to the battery cell, and the connecting member is connected to the shell.

[0023] According to the battery of the embodiment of the present invention, by adopting the current collecting disk of the above embodiment, the current collecting disk connects the main disk body and the connecting member by setting an interconnection member, so as to realize the electrical conduction from the main disk body to the connecting member, and the main disk body is in electrical contact with the battery cell, and the connecting member is in electrical contact with the shell or the pole, and the battery cell and the shell or the pole are electrically connected through the current collecting disk, that is, the current between the battery cell and the shell or the pole passes through the interconnection member. A hot melt portion is set in the interconnection member, and when the current passing through the interconnection member increases or the heat transferred from the battery cell to the interconnection member increases, the temperature of the hot melt portion gradually increases until the temperature of the hot melt portion is greater than the thermal failure temperature, so that the interconnection member is disconnected at the hot melt portion, thereby disconnecting the electrical conduction between the main disk body and the connecting member, realizing the current interruption between the battery cell and the shell or the pole, so as to avoid further increase in the temperature of the conductive path between the battery cell and the shell or the pole, reduce or avoid the safety risks such as expansion, combustion or explosion caused by overheating of the battery cell, and improve the safety of battery use.

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

[0025] According to the electric device of the embodiment of the present invention, by adopting the battery of the above embodiment, it is possible to reduce or avoid the 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 present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of a current collecting plate according to an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A top view of the collecting plate of the illustrated embodiment;

[0030] Figure 3 for Figure 1 A side structural view of the collector plate of the illustrated embodiment;

[0031] Figure 4 for Figure 3 A schematic diagram of the enlarged structure shown in the middle A;

[0032] Figure 5 Schematic diagram of the structure of a current collecting plate according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] Collecting plate 100,

[0035] The main disk body 10, the first surface 10a, the second surface 10b,

[0036] The bending portion 11, the notch 12, the positioning hole 13, the second through hole 14, the rib 15, the sink 16, the welding area 17, the groove 18,

[0037] Connecting member 20, first through hole 21,

[0038] Interconnection member 30 , hot-melt portion 31 , and bending section 32 . DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "bottom", "inside", "axial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The current collecting plate 100 , a battery and an electric device according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0043] like Figure 1-Figure 3 As shown, the current collecting disk 100 according to an embodiment of the present invention includes: a main disk body 10, a connecting member 20 and at least one interconnecting member 30. The two opposite surfaces of the main disk body 10 in the thickness direction are a first surface 10a and a second surface 10b, and the first surface 10a of the main disk body 10 is used to connect the battery cell. The connecting member 20 is arranged close to the second surface 10b of the main disk body 10, and the connecting member 20 is used to connect the shell or pole of the battery. The interconnecting member 30 is connected between the main disk body 10 and the connecting member 20, and the interconnecting member 30 includes a hot melt portion 31, and the hot melt portion 31 has a thermal failure temperature, and when the temperature of the hot melt portion 31 is greater than the thermal failure temperature, the interconnecting member 30 is disconnected at the hot melt portion 31.

[0044] It can be understood that the main disc body 10, the connecting member 20 and the interconnecting member 30 are all conductive members. When current passes through the collecting disc 100, the heat generated by the collecting disc 100 gradually increases with the increase of current, that is, the temperature of the collecting disc 100 increases with the increase of current.

[0045] The collector disk 100 of the present application connects the main disk body 10 and the connector 20 by setting an interconnection member 30 to achieve electrical conduction from the main disk body 10 to the connector 20, and 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 pole, and the battery cell and the shell or the pole are electrically connected through the collector disk 100, that is, the current between the battery cell and the shell or the pole passes through the interconnection member 30. A hot melt portion 31 is provided in the interconnection member 30, and when the current passing through the interconnection member 30 increases or the heat transferred from the battery cell to the interconnection member 30 increases, the temperature of the hot melt portion 31 gradually increases until the temperature of the hot melt portion 31 is greater than the thermal failure temperature, so that the interconnection member 30 is disconnected at the hot melt portion 31, thereby disconnecting the electrical conduction between the main disk body 10 and the connector 20, and realizing the interruption of the current between the battery cell and the shell or the pole, so as to avoid further increase in the temperature of the conductive path between the battery cell and the shell or the pole, reduce or avoid the safety risks such as expansion, combustion or explosion caused by overheating of the battery cell, and improve the safety of the battery.

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

[0047] It should be noted that the factors that cause the temperature of the hot melt portion 31 to reach the thermal failure temperature are not limited. For example, due to a short circuit in the battery, the current passing through the collector disk 100 suddenly increases, causing the temperature of the hot melt portion 31 to rise rapidly. For another example, due to the long-term use of the battery, the battery cell ages, making the battery cell prone to heat, causing the overall temperature of the battery to rise. When the heat of the battery cell is transferred to the collector disk 100, the temperature of the hot melt portion 31 rises. At this time, the hot melt portion 31 is disconnected, which can also provide power-off protection for the battery cell, reducing or avoiding further heating of the battery cell. For another example, the temperature of the external environment of the battery is too high, causing the battery cell or the collector disk 100 to easily generate heat.

[0048] In the present application, there is no limitation on the location of the hot melt portion 31 on the interconnection member 30. For example, the cross-sectional area of ​​all parts of the interconnection member 30 between the main plate body 10 and the two ends of the connection member 20 is the same, and the hot melt portion 31 is formed on all parts of the interconnection member 30 between the main plate body 10 and the two ends of the connection member 20.

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

[0050] In some embodiments, the main disk body 10 , the connecting member 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 portion 31 is smaller than the flow areas of the main disk body 10 and the connecting member 20 .

[0051] It is understandable that the current intensity passing through the main disk body 10, the interconnection member 30 and the connection member 20 is the same. However, the flow area of ​​the interconnection member 30 is smaller than that of the main disk body 10 and the connection member 20, so that the resistance of the interconnection member 30 at the hot melt portion 31 is greater than that of the main disk body 10 and the connection member 20.

[0052] Therefore, when current is conducted in the main disk body 10, the interconnection member 30 and the connection member 20, under the premise that the main disk body 10, the connection member 20 and the interconnection member 30 are made of the same material, the temperature of the hot melt portion 31 with the largest resistance rises fastest, that is, the temperature of the hot melt portion 31 is greater than the temperature of the main disk body 10 and the connection member 20. When the temperature of the hot melt portion 31 reaches the thermal failure temperature, the interconnection member 30 is disconnected at the hot melt portion 31. At this time, the temperature of the main disk body 10 and the connection member 20 is lower than the thermal failure temperature, so that the interconnection member 30 can be disconnected at the hot melt portion 31 when the battery overheats and creates a safety risk, thereby ensuring the current collecting disk 100's current cut-off protection effect at the hot melt portion 31 when the battery overheats.

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

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

[0055] In some embodiments, the interconnecting member 30 is made of a low melting point material at least in the hot melt portion 31, and the main disk body 10 and the connecting member 20 are made of a high melting point material, so that the thermal failure temperature of the hot melt portion 31 is lower than the temperature when the battery is overheated. Therefore, when the battery temperature is too high and a safety risk occurs, the hot melt portion 31 with a lower thermal failure temperature can be disconnected, thereby ensuring the current collecting disk 100's current cut-off protection effect when the hot melt portion 31 overheats the battery.

[0056] In some embodiments, the thermal failure temperature is greater than or equal to 150° C., so that when the temperature of the hot melt portion 31 is greater than or equal to 150° C., the interconnection member 30 is disconnected at the hot melt portion 31 to ensure the safety of the battery.

[0057] In some embodiments, the number of interconnecting members 30 is a plurality of interconnecting members 30 distributed at intervals, and the minimum spacing between two adjacent interconnecting members 30 is less than or equal to 10 mm. Thus, the current carrying capacity between the main disk body 10 and the connecting member 20 can be improved, and the plurality of interconnecting members 30 can disperse the carrying current and reduce the heat generation of the interconnecting members 30.

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

[0059] In some embodiments, the width of the interconnection member 30 is 1 mm to 15 mm. Therefore, under this width, the interconnection strip 30 can meet the current carrying capacity and can be effectively melted and disconnected at the thermal failure temperature.

[0060] It should be noted that, when the number of interconnection members 30 is a plurality of interconnection members 30 distributed at intervals, the width of each interconnection member 30 is 1 mm-15 mm.

[0061] In some embodiments, Figure 1 , Figure 2 and Figure 5 As shown, the interconnection member 30 includes a bending section 32, the main plate body 10 includes a bending portion 11, and the bending section 32 is connected between the bending portion 11 and the hot-melt portion 31. Notches 12 are respectively arranged on both sides of the bending portion 11 on the edge of the main plate body 10.

[0062] It can be understood that the position of the main disk body 10 corresponds to the battery cell setting, and the position of the connecting member 20 corresponds to the shell or pole setting. However, due to different battery sizes or deviations in the installation position, the relative position of the main disk body 10 and the connecting member 20 is prone to change, that is, the relative position of the main disk body 10 and the connecting member 20 is prone to change.

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

[0064] At the same time, the current collector can be adapted to batteries of different sizes, thereby improving the versatility of the current collector.

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

[0066] In some embodiments, Figure 2 , Figure 5 As shown, a through positioning hole 13 is provided at the center of the main disk body 10 for being coaxially arranged with the battery core.

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

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

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

[0070] In some embodiments, Figure 1-Figure 3 As shown, the connecting member 20 is provided with at least one first through hole 21 , and the main disk body 10 is provided with at least one second through hole 14 .

[0071] It is understandable that after the connector 20 is connected to the battery shell or pole, the main disk body 10 is connected to the battery cell, and the shell or pole is installed in the battery, the electrolyte needs to be injected into the battery.

[0072] Thus, the electrolyte injected into the battery from the shell or the pole can flow into the battery cell through the first through hole 21 and the second through hole 14, so as to realize the injection of the electrolyte into the battery. At the same time, the electrolyte can flow on both sides of the main disk body 10 through the second through hole 14, ensuring that the electrolyte can fully flow into the battery cell.

[0073] Preferably, when injecting electrolyte, the electrolyte mainly flows into the battery cell through the first through hole 21, and the second through hole 14 plays a supplementary role in injecting electrolyte into the battery. The heat inside the battery is mainly transferred to the outside of the battery through the second through hole 14, that is, the second through hole 14 is mainly used for heat dissipation inside the battery.

[0074] Furthermore, the ratio of the aperture of the first through hole 21 to the aperture of the second through hole 14 is 1:(0.2-5). Thus, the flow efficiency of the electrolyte in the first through hole 21 and the second through hole 14 can be ensured, and the heat dissipation efficiency of the battery through the second through hole 14 can be ensured.

[0075] It should be noted that, according to the different shapes of the first through hole 21 and the second through hole 14, the aperture of the first through hole 21 and the aperture 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 apertures are diameters. For another example, when the first through hole 21 and the second through hole 14 are rectangular, their apertures are the length of the rectangle. For another example, when the first through hole 21 and the second through hole 14 are elliptical, their apertures are 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 plate body 10. Thus, the multiple second through holes 14 can be used for the flow of electrolyte and the dissipation of heat inside the battery at different positions on the circumference of the main plate body 10, thereby improving the heat dissipation efficiency of the battery and the flow efficiency of the electrolyte.

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

[0078] It can be understood that when the main disk body 10 is connected to the end of the battery cell, at least part of the surface of the end surface of the battery cell is in contact with the main disk body 10 .

[0079] Therefore, by setting the convex 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 convex rib 15 can abut against the battery cell, so that a flow space for the electrolyte can be formed between the sink 16 and the end face of the battery cell, so that the electrolyte can flow between the main disk body 10 and the end face of the battery cell, thereby 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 is higher than the first surface 10a by 0.1 mm to 1 mm.

[0081] Furthermore, there are multiple sinkers 16 arranged radially, and each sinker 16 is provided with a second through hole 14. Thus, the electrolyte can flow radially on the end surface of the battery through the multiple sinkers 16, so that the electrolyte can flow into the battery cell from different positions on the end surface of the battery, further improving the flow efficiency of the electrolyte in the battery and ensuring the infiltration effect of the electrolyte on the battery cell.

[0082] In some embodiments, Figure 3 , Figure 4 As shown, the main disk body 10 has a plurality of convex ribs 15 formed on the first surface 10 a , and the convex ribs 15 form welding areas 17 for welding the battery core.

[0083] It is understandable that when the main disk body 10 is attached to the end face of the battery cell at the first surface 10a, the unevenness of the end face of the battery cell can easily lead to a gap at a local position 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 disk body 10 is welded to connect the battery cells in the welding area 17, and the contact area between the main disk body 10 and the end face of the battery cell through the rib 15 is small, which can improve the tightness of the main disk body 10 in the welding area 17 and the end face of the battery cell, thereby improving the firmness of the welding of the main disk body 10 in the welding area 17 at the end face of the battery cell.

[0085] Furthermore, the main plate body 10 is formed with a groove 18 on the second surface 10b corresponding to the convex rib 15. Thus, the convex rib 15 can be formed by stamping, which can simplify the process required for forming the convex rib 15, and there is no need to cut the main plate body 10, and the thickness of the main plate body 10 can be smaller, which can reduce the material cost and process cost of the main plate body 10.

[0086] In some embodiments, Figure 5 As shown, the collector plate 100 is a stamped part, and the main plate body 10, the connecting member 20 and the interconnecting member 30 are integrally formed parts. Therefore, the manufacturing process of the collector plate 100 can be simplified, and the collector plate 100 does not need to be cut, and the thickness of the collector plate 100 can be smaller, thereby reducing the material cost and process cost of the collector plate 100.

[0087] Furthermore, the interconnection member 30 includes a bending section 32 , the main disk body 10 includes a bending portion 11 , and the bending section 32 is connected to the bending portion 11 .

[0088] It is understandable that the collecting plate 100 is in a flat plate shape after stamping, and when the collecting plate 100 is installed in the battery, it is necessary to set the connecting member 20 on one side of the second surface 10b of the main plate body 10, and the connecting member 20 is separated from the second surface 10b of the main plate body 10.

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

[0090] The battery according to the embodiment of the present invention comprises: a housing, a battery cell and the current collecting plate 100 of the above embodiment. The housing is provided with a receiving cavity, the battery cell is arranged in the receiving cavity, the main plate body 10 of the current collecting plate 100 is connected to the battery cell, and the connector 20 is connected to the housing.

[0091] The battery of the present application adopts the current collecting plate 100 of the above-mentioned embodiment. The current collecting plate 100 connects the main plate body 10 and the connecting member 20 by setting an interconnecting member 30 to achieve electrical conduction from the main plate body 10 to the connecting member 20. The main plate body 10 is in electrical contact with the battery cell, and the connecting member 20 is in electrical contact with the shell or the pole. The battery cell and the shell or the pole are electrically conductive through the current collecting plate 100, that is, the current between the battery cell and the shell or the pole passes through the interconnecting member 30. A hot melt portion 31 is provided in the interconnection member 30. When the current passing through the interconnection member 30 increases or the heat transferred from the battery cell to the interconnection member 30 increases, the temperature of the hot melt portion 31 gradually increases until the temperature of the hot melt portion 31 is greater than the thermal failure temperature, so that the interconnection member 30 is disconnected at the hot melt portion 31, thereby disconnecting the electrical conduction between the main disk body 10 and the connecting member 20, and realizing the current interruption between the battery cell and the shell or the pole, so as to avoid further increase in the temperature of the conductive path from the battery cell to the shell or the pole, reduce or avoid the safety risks such as expansion, combustion or explosion caused by overheating of the battery cell, and improve the safety of battery use.

[0092] An electric device according to an embodiment of the present invention comprises the battery of the above embodiment.

[0093] The electrical device of the present application, by adopting 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 structures and operations of the current collecting plate 100, the battery and the electrical device according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A collecting plate, characterized in that: include: A main disk body (10), wherein two opposite surfaces of the main disk body (10) in the thickness direction are a first surface (10a) and a second surface (10b), and the first surface (10a) of the main disk body (10) is used for connecting a battery cell; A connecting piece (20), the connecting piece (20) being arranged close to the second surface (10b) of the main disk body (10), and the connecting piece (20) being used to connect a shell or a pole of a battery; At least one interconnecting member (30), the interconnecting member (30) being connected between the main disk body (10) and the connecting member (20), the interconnecting member (30) comprising a hot melt portion (31), the hot melt portion (31) having a thermal failure temperature, and the interconnecting member (30) being disconnected at the hot melt portion (31) when the temperature of the hot melt portion (31) is greater than the thermal failure temperature.

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

3. The collecting plate according to claim 1, characterized in that: The number of the interconnecting members (30) is a plurality distributed at intervals, and the minimum spacing between two adjacent interconnecting members (30) is less than or equal to 10 mm.

4. The collecting plate according to claim 1, characterized in that: The volume of the interconnecting member (30) accounts for 0.04%-2% of the volume of the collecting plate.

5. The collecting plate according to claim 1, characterized in that: The width of the interconnection member (30) is 1 mm to 15 mm.

6. The collecting plate according to claim 1, characterized in that: The interconnection member (30) comprises a bending section (32), the main disk body (10) comprises a bending portion (11), and the bending section (32) is connected between the bending portion (11) and the hot-melt portion (31); Notches (12) are respectively arranged on the edge of the main plate body (10) at both sides of the bent portion (11).

7. The collecting plate according to claim 1, characterized in that: A through positioning hole (13) is provided at the center of the main disk body (10) for being coaxially arranged with the battery core.

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

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

10. The collecting plate 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 collecting plate according to claim 10, characterized in that: The main disk body (10) forms a plurality of convex ribs (15) on the first surface (10a), at least two of the convex ribs (15) are connected on a side facing the center of the main disk body (10) to form a sink (16), and the second through hole (14) is located in the sink (16).

12. The collecting plate according to claim 11, characterized in that: The sinking platforms (16) are multiple and arranged in a radial shape, and each of the sinking platforms (16) is provided with the second through hole (14).

13. The collecting plate according to claim 1, characterized in that: The main disk body (10) forms a plurality of convex ribs (15) on the first surface (10a), and the convex ribs (15) form welding areas (17) for welding the battery core.

14. The collecting plate according to claim 13, characterized in that: The main disk body (10) is formed with a groove (18) on the second surface (10b) corresponding to the convex rib (15).

15. The collecting plate according to any one of claims 1 to 14, characterized in that: The current collecting disc is a stamped part, and the main disc body (10), the connecting part (20) and the interconnecting part (30) are integrally formed parts.

16. A battery, characterized in that: include: A housing, wherein a receiving cavity is provided in the housing; A battery cell, wherein the battery cell is disposed in the accommodating cavity; According to any one of claims 1 to 15, the main disc body (10) is connected to the battery core, and the connecting member (20) is connected to the shell.

17. An electrical device, characterized in that: Comprising the battery of claim 16.

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