Roll core supporting frame, battery and electric equipment

Abstract

The invention discloses a roll core supporting frame and a battery, and relates to the technical field of batteries, and the roll core supporting frame comprises a supporting rod and a supporting piece. Wherein the supporting rod is suitable for being arranged in a center hole of a roll core, a first exhaust channel is formed in the supporting rod, the supporting piece is arranged at the end of the supporting rod, an exhaust structure is arranged on the supporting piece, and the exhaust structure is communicated with the first exhaust channel. According to the roll core supporting frame, supporting can be provided in the roll core, and the efficiency of discharging gas and heat in the roll core out of the roll core is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a winding core support frame, a battery and an electrical device. Background Art

[0002] After the cylindrical battery core is wound, a cavity will be formed in the center. This makes the cavity inside the core of the cylindrical battery collapse during use, which affects the battery life. Once the core collapses in the cavity, it will affect the heat and gas transmission in the core, causing heat or gas accumulation in the battery, resulting in the risk of thermal runaway of the battery, affecting the safety performance of 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 core support frame, which can provide support inside the core and improve the efficiency of gas and heat in the core being discharged from the core.

[0004] The present invention also provides a battery having the winding core support frame.

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

[0006] According to an embodiment of the present invention, the core support frame includes: a support rod, which is suitable for being arranged in the central hole of the core, and the support rod forms a first exhaust channel; a support member, which is arranged at the end of the support rod, and the support member is provided with an exhaust structure, and the exhaust structure is connected to the first exhaust channel.

[0007] According to the core support frame of the embodiment of the present invention, the first exhaust channel can provide a channel for gas or heat transfer between the core and the support rod, and the exhaust structure on the support member can provide a channel for gas and heat to leave the core support frame and the core, thereby improving the efficiency of gas and heat in the core being discharged from the core. At the same time, the support rod can form support inside the core, reduce or avoid the accumulation of gas or heat inside the core due to the collapse of the core blocking the internal cavity, and reduce the safety risks caused by the expansion or heating of the core.

[0008] In some embodiments, the first exhaust passage is a first exhaust groove formed on the outer circumferential surface of the support rod.

[0009] In some embodiments, the first exhaust channel is arranged to penetrate the support rod along the axial direction; there is at least one first exhaust channel, and when there are at least two first exhaust channels, they are arranged at intervals along the circumference of the support rod.

[0010] In some embodiments, the support rod includes at least two support ribs, and the first exhaust channel is formed between two adjacent support ribs.

[0011] Furthermore, each of the support ribs is extended along the axial direction of the support rod, and a plurality of the support ribs are arranged at intervals along the circumferential direction of the support rod.

[0012] Furthermore, the plurality of support ribs are arranged at equal intervals along the circumference of the support rod; and / or, the distance between one end of any two of the support ribs away from the axis of the support rod and one end facing the axis of the support rod is equal; and / or, the ends of the plurality of support ribs facing the axis of the support rod are connected.

[0013] In some embodiments, the exhaust structure has an exhaust inlet and an exhaust outlet, the exhaust inlet is connected to the first exhaust channel, and the exhaust outlet is located at an edge of the support member and / or a side away from the support rod.

[0014] In some embodiments, the two opposite surfaces of the support member along the axis of the support rod are an inner end surface and an outer end surface, and the inner end surface is arranged toward the support rod; the exhaust structure includes: at least one of a second through groove and a vent hole; when the exhaust structure includes the second through groove, the second through groove is arranged on the inner end surface, the exhaust inlet end and the exhaust outlet end are both located in the second through groove, the exhaust inlet end extends to the support rod and is connected to the first exhaust channel, and the exhaust outlet end extends to the outer edge of the inner end surface; when the exhaust structure includes the vent hole, the vent hole is arranged through the support member along the axial direction of the support rod.

[0015] Furthermore, at least two ribs are formed on the inner end surface, at least one end of the ribs extends to the edge of the support member, the second through groove is formed between two adjacent ribs, and the end of the support rod in the axial direction is connected to the second through groove.

[0016] Furthermore, there are multiple second through grooves arranged radially, and the multiple second through grooves are connected to one end of the support rod; each of the second through grooves is provided with a convex rib on both sides; there is one convex rib between two adjacent second through grooves along the circumferential direction of the support member, or there are two convex ribs between two adjacent second through grooves along the circumferential direction, and the two convex ribs are connected at one end adjacent to the support rod.

[0017] Further, the exhaust structure includes the second through slot and the vent hole, and the vent hole is arranged through the second through slot.

[0018] In some embodiments, the exhaust structure includes an assembly vent hole, which is arranged to pass through the support member along the axial direction of the support rod; the support rod is penetrated at the assembly vent hole, and a portion of the first exhaust channel is located in the assembly vent hole.

[0019] In some embodiments, the support rod is one of a metal rod, a ceramic rod, a plastic rod, and a composite material rod; and / or the support member is a conductive metal plate, and the support member forms a welding area for welding the winding core on a side facing the support rod.

[0020] In some embodiments, the support rod is chamfered at one end away from the support member.

[0021] According to an embodiment of the present invention, the battery comprises: a shell, in which a accommodating cavity is arranged; a winding core, which is wound and located in the accommodating cavity; and the winding core support frame described in the above embodiment, wherein the support rod is arranged in the center hole of the winding core, and one end of the winding core abuts against the support member.

[0022] According to the battery of the embodiment of the present invention, by adopting the core support frame of the above embodiment, the first exhaust channel can provide a channel for gas or heat transfer between the core and the support rod, and the exhaust structure on the support member can provide a channel for gas and heat to leave the core support frame and the core, thereby improving the efficiency of gas and heat in the core to be discharged from the core. At the same time, the support rod can form a support inside the core, reduce or avoid the accumulation of gas or heat inside the core due to the collapse of the core blocking the internal cavity, reduce the safety risks caused by the expansion or heating of the core, and improve the safety of the battery.

[0023] In some embodiments, the axial length of the support rod is L1, the axial length of the winding core is L2, and the axial length of the accommodating cavity is L3, satisfying the condition: 1 / 4*L2≤L1≤L3, wherein L1, L2, and L3 are measured in the same unit.

[0024] In some embodiments, the battery further includes: a pole, the pole being disposed at one end of the shell adjacent to the support member; a conductive glue being disposed between the pole and the support member, the conductive glue having a failure temperature, and when the temperature of the conductive glue is greater than or equal to the failure temperature, the conductive glue decomposes or loses its conductivity.

[0025] An electric device according to an embodiment of the present invention includes the battery described in the above embodiment.

[0026] According to the electric equipment of the embodiment of the present invention, by adopting the battery of the above embodiment, the first exhaust channel can provide a channel for gas or heat transfer between the core and the support rod, and the exhaust structure on the support member can provide a channel for gas and heat to leave the core support frame and the core, thereby improving the efficiency of gas and heat in the core to be discharged from the core. At the same time, the support rod can form a support inside the core, reduce or avoid the accumulation of gas or heat inside the core due to the collapse of the core blocking the internal cavity, reduce the safety risks caused by the expansion or heating of the core, and improve the safety of the battery.

[0027] 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

[0028] 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:

[0029] Figure 1 is a three-dimensional structural diagram of a winding core support frame according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 Another perspective structural diagram of the winding core support frame of the embodiment shown;

[0031] Figure 3 for Figure 1 A side view of the winding core support frame of the illustrated embodiment;

[0032] Figure 4 for Figure 1 A bottom view of the winding core support frame of the illustrated embodiment;

[0033] Figure 5 is a schematic structural diagram of a battery according to an embodiment of the present invention;

[0034] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the battery at the support member of the illustrated embodiment.

[0035] Reference numerals:

[0036] Battery 1000,

[0037] Core support frame 100,

[0038] Support rod 10, first exhaust channel 11, support rib 12, chamfer 13,

[0039] Support member 20, inner end surface 20a, outer end surface 20b,

[0040] Exhaust structure 21, exhaust inlet 21a, exhaust outlet 21b, second through groove 211, vent hole 212,

[0041] The rib 22, the groove 23,

[0042] Welding area 24,

[0043] Shell 200, accommodating chamber 210,

[0044] The winding core 300 , the pole 400 , and the conductive adhesive 500 . DETAILED DESCRIPTION

[0045] 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.

[0046] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "back", "bottom", "inner", "outer", "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.

[0047] 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.

[0048] The winding core support frame 100, the battery 1000 and the electric device according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0049] like Figure 1 , Figure 2As shown, the core support frame 100 according to an embodiment of the present invention includes: a support rod 10 and a support member 20. The support rod 10 is suitable for being arranged in the central hole of the core 300, and the support rod 10 is formed with a first exhaust channel 11. The support member 20 is arranged at the end of the support rod 10, and an exhaust structure 21 is provided on the support member 20, and the exhaust structure 21 is communicated with the first exhaust channel 11.

[0050] It is understandable that the support rod 10 is disposed in the center hole of the core 300, and the outer peripheral surface of the support rod 10 can provide support for the core 300, so that the support rod 10 fills the cavity formed in the center hole of the core 300 due to winding, and the support rod 10 can support the cavity, reducing or avoiding the expansion of the core 300 caused by long-term use or deformation caused by external forces. When gas or heat is generated in the core 300, the gas or heat in the core 300 can enter the first exhaust channel 11 and be transmitted to the exhaust structure 21 in the first exhaust channel 11. In addition, the support member 20 is disposed at the end of the support rod 10, that is, the support member 20 can stop at the end of the core 300, and can position the support rod 10 in the axial direction of the center hole of the core 300. Since the support member 20 is located at the end of the support rod 10 and stops at the end of the winding core 300, when airflow or heat is transmitted in the first exhaust channel 11 to the end of the support rod 10 close to the support member 20, the transmission of airflow or heat is easily blocked by the support member 20, resulting in difficulty for the airflow to flow out from between the support member 20 and the end of the winding core 300.

[0051] Thus, the support rod 10 can form a support inside the winding core 300, ensuring that the first exhaust channel 11 is axially connected along the center hole, and ensuring that the gas in the first exhaust channel 11 can be transmitted to the exhaust structure 21. The support member 20 can stop at the end surface of the winding core 300, ensuring the stability of the position of the support rod 10 in the winding core 300, and improving the stability of the airflow or heat transmission in the first exhaust channel 11.

[0052] In the core support frame 100 of the present application, the first exhaust channel 11 can provide a channel for gas or heat transfer between the core 300 and the support rod 10, and the exhaust structure 21 on the support member 20 can provide a channel for gas and heat to leave the core support frame 100 and the core 300, thereby improving the efficiency of gas and heat in the core 300 being discharged from the core 300. At the same time, the support rod 10 can form support inside the core 300, reduce or avoid the accumulation of gas or heat inside the core 300 due to the collapse of the core 300 blocking the internal cavity, and reduce the safety risks caused by the expansion or heating of the core 300.

[0053] In the present application, there is no limitation on the number of the supporting members 20 being one or two. Figure 1 , Figure 2In the example, a support member 20 is provided at one end of the support rod 10. In other embodiments, the core support frame 100 includes two support members 20, and a support member 20 is provided at each of the two axially opposite ends of the support rod 10, wherein at least one support member 20 is provided with an exhaust structure 21.

[0054] In some embodiments, the first exhaust channel 11 is a first exhaust groove formed on the outer circumference of the support rod 10. Thus, the gas generated by the winding core 300 can enter the first exhaust groove from the outer circumference of the support rod 10, and the first exhaust groove has a larger open area than the winding core 300, thereby improving the efficiency of the airflow into the first exhaust groove and reducing the resistance of the airflow flowing in the first exhaust groove.

[0055] In some embodiments, Figure 1-Figure 3 As shown, the first exhaust channel 11 is arranged through the axial direction of the support rod 10. There is at least one first exhaust channel 11, and when there are at least two first exhaust channels 11, they are arranged at intervals along the circumference of the support rod 10. It can be understood that the support rod 10 is surrounded by the winding core 300 along the circumference, and there is a risk of gas or heat generated at the position of the winding core 300 surrounding the support rod 10 circumferentially.

[0056] Thus, the first exhaust channel 11 is also open at the two end faces of the support rod 10, so that gas or heat can enter or flow out of the first exhaust channel 11 along the axial direction of the support rod 10, thereby improving the guiding effect of the first exhaust channel 11 on the airflow or heat. Moreover, multiple first exhaust channels 11 are distributed at intervals along the circumference of the support rod 10, which can increase the number of first exhaust channels 11 on the outer circumference of the support rod 10, and gas or heat at different circumferential positions of the support rod 10 can enter the first exhaust channels 11 at the corresponding positions. Multiple first exhaust channels 11 can improve the guiding effect of gas or heat at different circumferential positions of the support rod 10, and improve the transmission efficiency of the core support frame 100 for airflow or heat.

[0057] It should be noted that the present application does not limit the axial length of the first exhaust channel 11 in the center hole. The axial length of the first exhaust channel 11 in the center hole can be set according to the length relationship between the winding core 300 and the support rod 10, or the length of the support rod 10 extending into the winding core 300. For example, when the support rod 10 is fully extended into the winding core 300, the axial length of the first exhaust channel 11 in the center hole is the same as the length of the support rod 10.

[0058] exist Figure 5In the example, when the length of the support rod 10 is less than the length of the core 300, one end of the support rod 10 is located inside the core 300, and the gas or heat generated by the part of the core 300 where the support rod 10 is not located can flow into the first exhaust channel 11 through the end of the support rod 10, thereby ensuring the transmission effect of the first exhaust channel 11 on the gas or heat in the core 300.

[0059] In some embodiments, Figure 1-Figure 4 As shown, the support rod 10 includes at least two support ribs 12, and a first exhaust channel 11 is formed between two adjacent support ribs 12. Thus, the first exhaust channel 11 is defined and formed by the support ribs 12, that is, the support ribs 12 can be used to form the first exhaust channel 11 while providing a function of supporting the winding core 300, which can simplify the structure of the support rod 10.

[0060] Further, each support rib 12 is extended along the axial direction of the support rod 10, and multiple support ribs 12 are arranged at intervals along the circumference of the support rod 10. Thus, the support rib 12 can support the winding core 300 along the axial direction, and multiple support ribs 12 are arranged at intervals along the circumference of the support rod 10, so that the support rod 10 supports the winding core 300 at different positions in the circumference and forms multiple first exhaust channels 11 arranged at intervals along the circumference of the support rod 10.

[0061] Furthermore, multiple support ribs 12 are arranged at equal intervals along the circumference of the support rod 10, or the distance between one end of all support ribs 12 away from the axis of the support rod 10 and one end facing the axis of the support rod 10 is equal, or the ends of multiple support ribs 12 facing the axis of the support rod 10 are connected.

[0062] Thus, the consistency of the supporting force of the plurality of supporting ribs 12 on the winding core 300 can be improved, thereby improving the stability of the support provided by the support rod 10 to the winding core 300 through the supporting ribs 12, and improving the uniformity of the supporting force on the winding core 300. At the same time, the consistency of the exhaust capacity of different first exhaust channels 11 can be improved.

[0063] In the present application, there is no limitation on the number of support ribs 12. Figure 4 In the example, the number of the support ribs 12 is 8, and the eight support ribs 12 are arranged at equal intervals along the circumference of the support rod 10 to form a "M"-shaped structure. The "M"-shaped structure formed by the support ribs 12 can reduce the consumables of the support rod 10 while ensuring that the support force on the winding core 300 is balanced, thereby reducing the manufacturing cost of the support rod 10.

[0064] In some embodiments, Figure 1 , Figure 2 and Figure 4As shown, the exhaust structure 21 has an exhaust inlet 21a and an exhaust outlet 21b, the exhaust inlet 21a is connected to the first exhaust channel 11, and the exhaust outlet 21b is located at the edge of the support member 20 or on a side away from the support rod 20, or at the edge of the support member 20 on a side away from the support rod 20.

[0065] Thus, the gas or heat entering the first exhaust channel 11 is transmitted along the support rod 10 to the exhaust inlet 21a and enters the exhaust structure 21. The gas or heat in the exhaust structure 21 can leave the exhaust structure 21 through the exhaust outlet 21b, so that the gas or heat leaves the core support frame 100 and the core 300 from the edge of the support member 20 or the side of the support member 20 away from the support rod 10.

[0066] Furthermore, the two opposite surfaces of the support member 20 along the axis of the support rod 10 are an inner end surface 20a and an outer end surface 20b, and the inner end surface 20a is disposed toward the support rod 10. The exhaust structure 21 includes: at least one of a second through groove 211 and a vent hole 212.

[0067] When the exhaust structure 21 includes a second through groove 211, the second through groove 211 is arranged on the inner end surface 20a, the exhaust inlet 21a and the exhaust outlet 21b are both located in the second through groove 211, the exhaust inlet 21a extends to the support rod 10 and is connected to the first exhaust channel 11, and the exhaust outlet 21b extends to the outer edge of the inner end surface 20a.

[0068] When the exhaust structure 21 includes the vent hole 212 , the vent hole 212 is provided through the support member 20 along the axial direction of the support rod 10 .

[0069] It is understandable that when the exhaust structure 21 includes the second through groove 211, the exhaust inlet end 21a extends to the support rod 10, and the gas or heat transmitted along the axial direction of the support rod 10 can enter the second through groove 211 from the exhaust inlet end 21a, and be transmitted along the second through groove 211 to the exhaust outlet end 21b, so that the gas or heat can leave the support member 20 from the edge of the inner end surface 20a. When the exhaust structure 21 includes the vent hole 212, the gas or heat can be transmitted through the vent hole 212 along the axial direction of the support rod 10, and the gas or heat can leave the support member 20 from the outer end surface 20b of the support member 20 after being transmitted through the vent hole 212.

[0070] Thus, the second through groove 211 can provide a transmission channel for gas or heat between the inner end surface 20a of the support member 20 and the end surface of the winding core 300, so that the gas or heat can be discharged from the edge of the inner end surface 20a of the support member 20. The vent hole 212 can provide a transmission channel for gas or heat to pass through the support member 20, so that the gas or heat can be discharged from the outer end surface 20b of the support member 20.

[0071] In other embodiments, the exhaust structure 21 is an exhaust channel arranged inside the support member 20, and the exhaust channel has an air inlet and an exhaust port. The air inlet constitutes the exhaust inlet end 21a and extends to the support rod 10, and the exhaust port constitutes the exhaust outlet end 21b and extends to the edge of the inner end surface 20a or extends to the outer end surface 20b.

[0072] Furthermore, at least two ribs 22 are formed on the inner end surface 20a, at least one end of the rib 22 extends to the edge of the support member 20, a second through groove 211 is formed between two adjacent ribs 22, and the end of the support rod 10 in the axial direction is connected to the second through groove 211.

[0073] It is understandable that when the winding core support frame 100 is disposed on the winding core 300 , the support member 20 stops at the end of the winding core 300 .

[0074] Thus, the convex rib 22 can stop at the end face of the winding core 300, so that there is a gap between the inner end face 20a of the support member 20 outside the convex rib 22 and the end face of the winding core 300 for gas or heat transfer, and a second through groove 211 is defined between the two convex ribs 22, and the end of the support rod 10 is located in the second through groove 211, so that the gas or heat can directly enter the second through groove 211 when it is axially transmitted to the end of the support rod 10. At least one end of the convex rib 22 extends to the edge of the support member 20, so that the second through groove 211 also extends to the edge of the support member 20, thereby defining the transmission direction of the gas or heat in the second through groove 211, guiding the gas or heat to be transmitted to the edge of the support member 20 and leaving the second through groove 211 from the edge of the support member 20.

[0075] Furthermore, there are multiple second through slots 211 arranged radially, and the ends of the multiple second through slots 211 facing the support rod 10 are connected, and convex ribs 22 are provided on both sides of each second through slot 211. There is one convex rib 22 between two second through slots 211 adjacent in the circumferential direction of the support member 10, or there are two convex ribs 22 between two second through slots 211 adjacent in the circumferential direction, and the two convex ribs 22 are connected at one end adjacent to the support rod 10.

[0076] Therefore, the support member 20 has a plurality of second through grooves 211 distributed at intervals along the circumferential direction on the inner end surface 20a. The gas or heat transmitted along the support rod 10 to the inner end surface 20a can be dispersed and transmitted in the plurality of second through grooves 211 and leave the support member 20 at different circumferential positions of the edge of the inner end surface 20a of the support member 20, thereby improving the transmission efficiency of the gas or heat.

[0077] In some embodiments, the rib 22 is formed by a portion of the support member 20 protruding toward the side where the support rod 10 is located, and a groove 23 is formed on the outer end surface 20b corresponding to the rib 22. Therefore, the rib 22 can be formed by stamping, which can simplify the process required to form the rib 22, and the support member 20 does not need to be cut, and the thickness of the support member 20 can be smaller, which can reduce the material cost and process cost of the support member 20.

[0078] In some embodiments, the exhaust structure 21 includes a second through slot 211 and a vent hole 212, and the vent hole 212 is arranged through the second through slot 211. Thus, the second through slot 211 can provide a transmission slot for gas or heat on the inner end surface 20a, and the vent hole 212 can provide a through slot for gas or heat to flow through the support member 20, thereby increasing the transmission path of gas or heat in the support member 20, and further improving the transmission efficiency of the exhaust structure 21 for gas or heat.

[0079] In addition, the electrolyte can also flow through the vent holes 212 , thereby increasing the flow path of the electrolyte in the battery 1000 and improving the wetting effect of the electrolyte on the winding core 300 .

[0080] In some embodiments, the exhaust structure 21 includes an assembly vent hole (not shown in the figure), which is arranged along the axial direction of the support rod 10 and penetrates the support member 20. The support rod 10 is arranged at the assembly vent hole, and a part of the first exhaust channel 11 is located in the assembly vent hole.

[0081] It can be understood that when the end of the support rod 10 is inserted into the assembly vent, a gas or heat transmission channel can be formed between the inner wall of the assembly vent and the first exhaust channel 11, so that the gas or heat can be transmitted through the first exhaust channel 11 and the assembly vent through the support member 20.

[0082] Therefore, the assembled vent hole can not only be used to connect the support member 20 with the support rod 10, but also avoid the first exhaust channel 11 and constitute a gas or heat transmission channel, so that the gas or heat can pass through the support member 20 along the axial direction of the support rod 10 and leave the core support frame 100, thereby achieving the discharge of gas or heat from the core 300.

[0083] In some embodiments, the support rod 10 is one of a metal rod, a ceramic rod, a plastic rod, and a composite material rod.

[0084] It is understandable that in order to ensure the stability of the support rod 10 in supporting the winding core 300 , the material used for the support rod 10 needs to have good structural strength.

[0085] Therefore, the support rod 10 is one of a metal rod, a ceramic rod, a plastic rod, and a composite material rod, which can ensure that the support rod 10 has sufficient structural strength and ensure the support stability of the support rod 10 on the winding core 300.

[0086] In some embodiments, the support member 20 is a conductive metal plate, and a welding area 24 for welding the winding core 300 is formed on a side of the support member 20 facing the support rod 10 .

[0087] Thus, the support member 20 is welded and connected to the core 300 in the welding area 24, and the support member 20 is able to conduct electricity, so that the support member 20 has the function of a current collecting disk. When the core support frame 100 is used for the battery 1000, the support member 20 can be reused as a current collecting disk while providing a limiting function for the support rod 10 and supporting the core 300. By electrically connecting the pole 400 of the battery 1000 with the support member 20, the electrical connection from the core 300 to the pole 400 can be achieved, thereby eliminating the need to additionally set up a current collecting disk in the battery 1000, achieving multiple uses of the core support frame 100, and simplifying the structure of the battery 1000 and the manufacturing process of the battery 1000.

[0088] In addition, the support rod 10 can reversely limit the position of the support member 20 on the end surface of the winding core 300, thereby reducing or avoiding the deviation or deformation of the support member 20 as a collecting disk, and improving the functional reliability of the support member 20 as a collecting disk.

[0089] Preferably, the support member 20 is made of a copper plate or an aluminum plate with a low resistivity and a certain structural strength.

[0090] Further, when a plurality of convex ribs 22 are formed on the support member 20, the welding area 24 is located on the convex ribs 22. It is understandable that when the support member 20 and the end surface of the winding core 300 are closely attached and welded, the unevenness of the end surface of the winding core 300 easily leads to a gap at a local position between the support member 20 and the end surface of the winding core 300, affecting the welding effect between the end surface of the winding core 300 and the support member 20.

[0091] Therefore, the welding area 24 on the convex rib 22 is smaller in area, which can improve the tightness of the convex rib 22 and the end surface of the winding core 300 at the welding area 24, thereby improving the firmness of the welding between the convex rib 22 and the end surface of the winding core 300 at the welding area 24.

[0092] In some embodiments, the support rod 10 is provided with a chamfer 13 at one end away from the support member 20 .

[0093] It is understandable that in the assembly of some batteries 1000 , the battery 1000 is first wound to form a winding core 300 , and then the support rod 10 is inserted into the cavity of the winding core 300 along the axial direction.

[0094] Therefore, by setting a chamfer 13 at the end of the support rod 10 away from the support member 20, when the support rod 10 is inserted into the cavity of the winding core 300, the end of the support rod 10 away from the support member 20 enters the cavity first. The setting of the chamfer 13 can reduce or avoid the end of the support rod 10 away from the support member 20 piercing the winding core 300 structure during the process of extending into the winding core 300.

[0095] like Figure 5 , Figure 6 As shown, the battery 1000 according to the embodiment of the present invention includes: a shell 200 , a winding core support frame 100 and a winding core 300 .

[0096] The housing 200 has a receiving cavity 210. The core 300 is wound and located in the receiving cavity 210. The core support frame 100 is the core support frame 100 of the above embodiment, the support rod 10 is disposed in the central hole of the core 300, and one end of the core 300 abuts against the support member 20.

[0097] The battery 1000 of the present application adopts the core support frame 100 of the above embodiment, and the first exhaust channel 11 can provide a channel for gas or heat transfer between the core 300 and the support rod 10, and the exhaust structure 21 on the support member 20 can provide a channel for gas and heat to leave the core support frame 100 and the core 300, thereby improving the efficiency of gas and heat in the core 300 to be discharged from the core 300. At the same time, the support rod 10 can form a support inside the core 300, reduce or avoid the accumulation of gas or heat inside the core 300 due to the collapse of the core 300 blocking the internal cavity, reduce the safety risk caused by the expansion or heating of the core 300, and improve the safety of the battery 1000.

[0098] In some embodiments, the axial length of the support rod 10 is L1, the axial length of the core 300 is L2, and the axial length of the accommodating cavity 210 is L3, which satisfies the condition: 1 / 4*L2≤L1≤L3, where L1, L2, and L3 are measured in the same unit. In this way, the support effect of the support rod 10 on the core 300 at all positions along the axial direction can be ensured, and the probability of the internal cavity of the core 300 collapsing can be reduced.

[0099] When both ends of the support rod 10 in the axial direction are connected with the support members 20 , L2≤L1≤L3, thereby ensuring that the two support members 20 can be located at both ends of the winding core 300 in the axial direction.

[0100] In some embodiments, the battery 1000 further includes: a pole 400 and a conductive adhesive 500. The pole 400 is disposed at one end of the housing 200 adjacent to the support member 20, and the conductive adhesive 500 is disposed between the pole 400 and the support member 20. The conductive adhesive 500 has a failure temperature, and when the temperature of the conductive adhesive 500 is greater than or equal to the failure temperature, the conductive adhesive 500 decomposes or loses conductivity.

[0101] Thus, the pole 400 and the support member 20 are bonded together by the conductive adhesive 500 to keep the relative positions of the pole 400 , the support member 20 and the winding core 300 stable.

[0102] When the support member 20 is a conductive metal plate, the pole 400 and the support member 20 are electrically connected through the conductive adhesive 500, ensuring that the support member 20 and the pole 400 are adhered and fixed and have good current carrying capacity. When the internal temperature of the battery 1000 rises and thermal runaway occurs, the conductive adhesive 500 can be decomposed or lose conductivity by heat, so that the current between the support member 20 and the pole 400 is cut off, thereby cutting off the internal circuit of the battery 1000, reducing or avoiding the safety risk of the battery 1000 due to thermal runaway, and improving the safety of the battery 1000.

[0103] The electrical device according to an embodiment of the present invention includes a battery 1000 as described in the above embodiment.

[0104] The electrical equipment of the present application, by adopting the battery 1000 of the above embodiment, the first exhaust channel 11 can provide a channel for gas or heat transfer between the core 300 and the support rod 10, and the exhaust structure 21 on the support member 20 can provide a channel for gas and heat to leave the core support frame 100 and the core 300, thereby improving the efficiency of gas and heat in the core 300 being discharged from the core 300. At the same time, the support rod 10 can form a support inside the core 300, reduce or avoid the accumulation of gas or heat inside the core 300 due to the collapse of the core 300 blocking the internal cavity, reduce the safety risk caused by the expansion or heating of the core 300, and improve the safety of the battery 1000.

[0105] The other structures and operations of the winding core support frame 100, the battery 100 and the electrical equipment according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0106] 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.

[0107] 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 core support frame, characterized in that: include: A support rod (10), the support rod (10) being suitable for being arranged in a central hole of the winding core (300), and the support rod (10) being formed with a first exhaust channel (11); A support member (20), the support member (20) being arranged at the end of the support rod (10), the support member (20) being provided with an exhaust structure (21), the exhaust structure (21) being in communication with the first exhaust channel (11).

2. The winding core support frame according to claim 1, characterized in that: The first exhaust passage (11) is a first exhaust groove formed on the outer peripheral surface of the support rod (10).

3. The winding core support frame according to claim 1, characterized in that: The first exhaust passage (11) is arranged to penetrate along the axial direction of the support rod (10); The number of the first exhaust passage (11) is at least one, and when the number of the first exhaust passage (11) is at least two, the first exhaust passages (11) are arranged at intervals along the circumference of the support rod (10).

4. The winding core support frame according to claim 1, characterized in that: The support rod (10) comprises at least two support ribs (12), and the first exhaust channel (11) is formed between two adjacent support ribs (12).

5. The winding core support frame according to claim 4, characterized in that: Each of the support ribs (12) is arranged to extend in the axial direction of the support rod (10), and a plurality of the support ribs (12) are arranged at intervals in the circumferential direction of the support rod (10).

6. The winding core support frame according to claim 5, characterized in that: The plurality of support ribs (12) are arranged at equal intervals along the circumference of the support rod (10); And / or, the distance between one end of any two of the support ribs (12) that is away from the axis of the support rod (10) and one end that is toward the axis of the support rod (10) is equal; And / or, one end of a plurality of the support ribs (12) facing the axis of the support rod (10) is connected.

7. The winding core support frame according to any one of claims 1 to 6, characterized in that: The exhaust structure (21) comprises an exhaust inlet (21a) and an exhaust outlet (21b), wherein the exhaust inlet (21a) is connected to the first exhaust channel (11), and the exhaust outlet (21b) is located at the edge of the support member (20) and / or at a side away from the support rod (10).

8. The winding core support frame according to any one of claims 7, characterized in that: The two opposite surfaces of the support member (20) along the axis of the support rod (10) are an inner end surface (20a) and an outer end surface (20b), and the inner end surface (20a) is arranged toward the support rod (10); The exhaust structure (21) comprises: at least one of a second through groove (211) and an air vent (212); When the exhaust structure (21) includes the second through groove (211), the second through groove (211) is provided on the inner end surface (20a), the exhaust inlet end (21a) and the exhaust outlet end (21b) are both located in the second through groove (211), the exhaust inlet end (21a) extends to the support rod (10) and communicates with the first exhaust channel (11), and the exhaust outlet end (21b) extends to the outer edge of the inner end surface (20a); When the exhaust structure (21) includes the vent hole (212), the vent hole (212) is arranged along the axial direction of the support rod (10) and penetrates the support member (20).

9. The winding core support frame according to claim 8, characterized in that: At least two convex ribs (22) are formed on the inner end surface (20a), at least one end of the convex rib (22) extends to the edge of the support member (20), a second through groove (211) is formed between two adjacent convex ribs (22), and the end of the support rod (10) in the axial direction is connected to the second through groove (211).

10. The winding core support frame according to claim 9, characterized in that: There are a plurality of the second through grooves (211) arranged in a radial shape, and one end of the plurality of the second through grooves (211) facing the support rod (10) is connected; Each of the second through grooves (211) is provided with convex ribs (22) on both sides; There is one convex rib (22) between two second through grooves (211) adjacent to each other in the circumferential direction of the support member (20), or there are two convex ribs (22) between two second through grooves (211) adjacent to each other in the circumferential direction, and the two convex ribs (22) are connected at one end adjacent to the support rod (10).

11. The winding core support frame according to claim 8, characterized in that: The exhaust structure (21) comprises the second through groove (211) and the vent hole (212), and the vent hole (212) is arranged through the second through groove (211).

12. The winding core support frame according to any one of claims 1 to 6, characterized in that: The exhaust structure (21) comprises an assembly vent hole, wherein the assembly vent hole is arranged along the axial direction of the support rod (10) and penetrates the support member (20); The support rod (10) is inserted through the assembly vent hole, and a portion of the first exhaust channel (11) is located in the assembly vent hole.

13. The winding core support frame according to any one of claims 1 to 6, characterized in that: The support rod (10) is one of a metal rod, a ceramic rod, a plastic rod, and a composite material rod; And / or, the support member (20) is a conductive metal plate, and the support member (20) forms a welding area (24) for welding the winding core (300) on a side facing the support rod (10).

14. The winding core support frame according to any one of claims 1 to 6, characterized in that: The support rod (10) is provided with a chamfer (13) at one end away from the support member (20).

15. A battery, characterized in that: include: A housing (200), wherein a receiving chamber (210) is provided in the housing (200); A winding core (300), the winding core (300) being formed by winding and being located in the accommodating cavity (210); According to the winding core support frame (100) as described in any one of claims 1 to 13, the support rod (10) is arranged in the central hole of the winding core (300), and one end of the winding core (300) abuts against the support member (20).

16. The battery according to claim 15, characterized in that The axial length of the support rod (10) is L1, the axial length of the winding core (300) is L2, and the axial length of the accommodating cavity (210) is L3, satisfying the condition: 1 / 4*L2≤L1≤L3, wherein L1, L2, and L3 are measured in the same unit.

17. The battery according to claim 15, characterized in that Also includes: A pole (400), the pole (400) being arranged at one end of the housing (200) adjacent to the support member (20); A conductive adhesive (500) is provided between the pole (400) and the support member (20), the conductive adhesive (500) having a failure temperature, and when the temperature of the conductive adhesive (500) is greater than or equal to the failure temperature, the conductive adhesive (500) decomposes or loses conductivity.

18. An electrical equipment, characterized in that: Comprising a battery as claimed in any one of claims 15 to 17.

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