Collecting plate for battery and battery

Abstract

The invention relates to the technical field of batteries, particularly provides a collector plate for a battery and the battery, and aims to solve the problem of short circuit in the battery caused by the fact that welding slag easily falls into the battery when an existing collector plate and a positive pole column are welded. The collector plate comprises a body, the side, close to a positive pole, of the body can be welded to the positive pole, and the side, away from the positive pole, of the body is provided with a welding position; the protection component is arranged on the side, away from the positive pole, of the body, the protection component is provided with a protection cavity matched with the welding position, the end of the protection cavity communicates with the welding position so that the welding needle can penetrate through the protection cavity and reach the welding position to weld the body and the positive pole, and the protection component abuts against the body; and therefore, welding slag generated by welding the body and the positive pole can be collected into the protection cavity. Welding slag generated in the welding process can be collected into the protection cavity, post-treatment of the welding slag is facilitated, the welding slag is prevented from entering a battery, and therefore the safety of the battery is greatly improved.

Description

Technical Field

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

[0002] The positive collector plate and pole of large cylindrical batteries are generally welded by ultrasonic torque welding. Ultrasonic torque welding will inevitably produce welding slag, which will increase the risk of short circuit inside the battery cell. Therefore, the design of the positive collector plate has always attracted much attention. Summary of the invention

[0003] The present invention aims to solve the above technical problem, that is, to solve the problem that welding slag is easily dropped into the battery during the welding of the current collecting plate and the positive electrode column, thus causing a short circuit inside the battery.

[0004] In a first aspect, the present invention provides a current collecting plate for a battery, the battery comprising a positive electrode column, the current collecting plate comprising: a body, a side of the body close to the positive electrode column can be welded to the positive electrode column, and a side of the body away from the positive electrode column has a welding position; and a protective component, which is arranged on a side of the body away from the positive electrode column, the protective component has a protective cavity adapted to the welding position, an end of the protective cavity is connected to the welding position, and the protective component abuts against the body.

[0005] In the preferred technical solution of the above-mentioned current collecting plate for the battery, the main body is provided with an annular groove at a position corresponding to the positive electrode column, the annular groove extends in a direction away from the positive electrode column to form an annular boss, the welding position is formed on the inner side of the annular boss, and the protective component abuts against the annular boss.

[0006] In the above-mentioned preferred technical solution of the current collecting plate for the battery, a through hole is provided on the annular boss, the protective component includes a protective ring, a connecting piece and a limiting piece, the interior of the protective ring forms the protective cavity, the limiting piece is located in the annular groove, one end of the connecting piece is connected to the limiting piece, and the other end of the connecting piece passes through the through hole and is connected to the protective ring.

[0007] In the preferred technical solution of the current collecting plate for the battery, there are multiple through holes, and the multiple through holes are distributed at intervals along the circumference of the annular boss.

[0008] In the preferred technical solution of the current collecting plate for the battery, the connecting member and the protective ring are integrally formed; and / or the connecting member and the limiting member are integrally formed.

[0009] In the preferred technical solution of the current collecting plate for the battery, a groove matching with the protective ring is provided on the annular boss.

[0010] In the preferred technical solution of the current collecting plate for the battery, the protective component further includes an adhesive layer, and the adhesive layer is arranged on the inner wall of the protective cavity.

[0011] In the preferred technical solution of the above-mentioned current collecting plate for the battery, the main body includes a connecting plate, a connecting plate and an outer ring plate, the outer ring plate is arranged on the outside of the connecting plate, the connecting plate is located between the connecting plate and the outer ring plate and its two ends are electrically connected to the connecting plate and the outer ring plate respectively, the welding position is formed on the connecting plate, and the protective component is arranged on the side of the connecting plate away from the positive electrode column.

[0012] In the preferred technical solution of the above-mentioned current collecting plate for a battery, the connecting piece is bent toward the direction of the positive electrode column.

[0013] In the preferred technical solution of the current collecting disk for the battery, there are multiple connecting pieces, and the multiple connecting pieces are distributed at intervals along the circumference of the connecting disk.

[0014] In a second aspect, the present invention provides a battery, comprising the above-mentioned current collecting plate for a battery.

[0015] In a preferred technical solution of the above battery, the battery further comprises a winding core assembly having a central hole, and when installed, the protective member is located in the central hole.

[0016] In the case of adopting the above technical solution, the present invention provides a protective component at the main body welding position of the current collecting disk, and the protective component has a protective cavity, so that when the positive electrode column and the current collecting disk are welded, the welding needle can pass through the protective cavity and reach the welding position on the main body. Since the welding needle is always located in the protective cavity during the welding process, the welding slag generated during the welding process will be collected in the protective cavity, avoiding the problem of welding slag entering the interior of the battery and causing a battery short circuit, thereby greatly improving the safety of the battery.

[0017] Furthermore, by forming an annular groove and an annular boss on the main body, the welding position is formed on the inner side of the annular boss. On the one hand, it is convenient to position the welding position, so that the welding position of the current collecting plate and the positive electrode column is more accurate, thereby improving the welding accuracy of the battery; on the other hand, it is convenient to position the installation of the protective component, thereby ensuring that the welding slag generated by the welding of the current collecting plate and the positive electrode column is all collected in the protective cavity, further improving the safety of the battery.

[0018] Furthermore, compared with the form of gluing the protective component to the annular boss, by providing the protective component in the form of a limiter, a connector and a protective ring, the protective ring can be stably abutted against the annular boss, thereby preventing welding slag from falling into the battery due to the protective ring falling off during welding. At the same time, it can also prevent the protective ring from falling off during the use of the battery, thereby improving the connection stability between the protective component and the main body, and further improving the safety of the battery.

[0019] Furthermore, by setting the number of through holes to be multiple, it is possible to avoid having too few connection points between the protective ring and the limiter due to too few through holes, thereby avoiding affecting the connection stability between the protective ring and the limiter, and avoiding the problem of the protective ring falling off due to unstable connection of the protective ring, thereby improving the protective effect of the protective ring during welding.

[0020] Furthermore, by arranging the protective ring, the connecting piece and the limiting piece into an integrally formed manner and connecting the connecting piece and the protective ring or the connecting piece and the limiting piece, the overall structure of the protective component can be made more complete and the overall structural strength can be higher, thereby further improving the stability of the protective component and better preventing the protective ring from falling off the annular boss.

[0021] Furthermore, by clamping the protective ring in the clamping groove, the connection position between the protective ring and the connecting piece can be strengthened, avoiding the connection between the protective ring and the connecting piece from being broken due to stress, and further improving the connection stability between the protective ring and the annular boss.

[0022] Furthermore, by providing an adhesive layer inside the protective component, the welding slag generated when welding the main body and the positive electrode column can adhere to the inner wall of the protective cavity, avoiding the risk of the welding slag not being cleaned properly and falling into the battery, causing a short circuit inside the battery, thereby further improving the safety of the battery.

[0023] Furthermore, by configuring the main body to be interconnected connecting plates, connecting plates and outer ring plates, a gap can be created between the connecting plates and the outer ring plates, thereby increasing the infiltration channel for the electrolyte, improving the infiltration effect of the battery, and further improving the overall performance of the battery.

[0024] Furthermore, by bending the connecting piece toward the positive electrode column, on the one hand, the length of the connecting piece is increased, thereby improving the shock-absorbing effect of the connecting piece; on the other hand, the connecting piece is made arched, which improves the structural strength of the connecting piece, avoids the connecting piece from breaking when it is vibrated, and improves the structural stability of the main body.

[0025] Furthermore, by setting the number of connecting pieces to be multiple, the connection stability between the connecting disk and the outer ring piece is improved, and at the same time, it can avoid poor connection between the connecting piece and the connecting disk and the outer ring piece, which may cause battery failure.

[0026] In addition, the battery further provided by the present invention on the basis of the above-mentioned technical solution includes the above-mentioned current collecting plate for the battery, and thus has the beneficial effects of the above-mentioned current collecting plate. Compared with the battery before improvement, the battery of the present invention has higher safety of the internal battery cells, lower risk of short circuit inside the battery, and higher overall performance of the battery.

[0027] Furthermore, by locating the protective component in the center hole, on the one hand, when the collecting plate and the battery are assembled, the protective component can be located in the center hole of the winding core, avoiding the protective component occupying the internal space of the battery and reducing the space utilization rate inside the battery, thereby avoiding affecting the energy density of the battery; on the other hand, the height of the protective ring can be unaffected by the winding core assembly, thereby facilitating the arbitrary adjustment of the height of the protective ring to meet actual welding needs.

[0028] Option 1: A current collecting plate for a battery, the battery comprising a positive electrode column, characterized in that the current collecting plate comprises: a main body, a side of the main body close to the positive electrode column can be welded to the positive electrode column, and a side of the main body away from the positive electrode column has a welding position; and a protective component, which is arranged on a side of the main body away from the positive electrode column, the protective component has a protective cavity adapted to the welding position, the protective cavity is connected to the welding position, and the protective component abuts against the main body.

[0029] Option 2: The current collecting plate for a battery according to Option 1 is characterized in that the main body is provided with an annular groove at a position corresponding to the positive electrode column, the annular groove extends in a direction away from the positive electrode column to form an annular boss, the welding position is formed on the inner side of the annular boss, and the protective component rests on the annular boss.

[0030] Solution 3: The current collecting plate for a battery according to Solution 2 is characterized in that a through hole is provided on the annular boss, the protective component includes a protective ring, a connecting piece and a limiting piece, the interior of the protective ring forms the protective cavity, the limiting piece is located in the annular groove, one end of the connecting piece is connected to the limiting piece, and the other end of the connecting piece passes through the through hole and is connected to the protective ring.

[0031] Solution 4: The current collecting plate for a battery according to Solution 3 is characterized in that there are multiple through holes, and the multiple through holes are distributed at intervals along the circumference of the annular boss.

[0032] Solution 5: The current collecting plate for a battery according to Solution 3 is characterized in that the connecting member and the protective ring are integrally formed; and / or the connecting member and the limiting member are integrally formed.

[0033] Solution 6: The current collecting plate for a battery according to Solution 3 is characterized in that a groove adapted to the protective ring is provided on the annular boss.

[0034] Solution 7: The current collecting plate for a battery according to any one of Solutions 1 to 6, characterized in that the protective component further includes an adhesive layer, and the adhesive layer is arranged on the inner wall of the protective cavity.

[0035] Scheme 8: The current collecting plate for a battery according to Scheme 1 is characterized in that the main body includes a connecting plate, a connecting plate and an outer ring plate, the outer ring plate is arranged on the outside of the connecting plate, the connecting plate is located between the connecting plate and the outer ring plate and its two ends are electrically connected to the connecting plate and the outer ring plate respectively, the welding position is formed on the connecting plate, and the protective component is arranged on the side of the connecting plate away from the positive electrode column.

[0036] Solution 9: The current collector for a battery according to Solution 8 is characterized in that the connecting piece is bent toward the positive electrode column.

[0037] Solution 10: The current collecting plate for a battery according to Solution 8 is characterized in that there are multiple connecting plates, and the multiple connecting plates are distributed at intervals along the circumference of the connecting plate.

[0038] Option 11: A battery, characterized in that it includes a current collecting plate for a battery as described in any one of Options 1 to 10.

[0039] Option 12: The battery according to Option 11 is characterized in that the battery also includes a winding core assembly, the winding core assembly has a center hole, and when installed, the protective member is located in the center hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0041] Figure 1 It is a schematic structural diagram of a current collecting plate for a battery of the present invention;

[0042] Figure 2 yes Figure 1 Schematic diagram of the structure after the protective components are hidden Figure 1 ;

[0043] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0044] Figure 4 yes Figure 1 Schematic diagram of the structure after the protective components are hidden Figure 2 ;

[0045] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point B in the middle;

[0046] Figure 6 It is a schematic structural diagram of the protective component of the present invention;

[0047] Figure 7 It is a schematic structural diagram of a battery of the present invention;

[0048] Figure 8 yes Figure 7 Schematic diagram of the local structure of the cross-sectional view along the CC line.

[0049] List of reference numerals:

[0050] 1. Main body; 11. Outer ring; 12. Connecting plate; 121. Annular groove; 1211. Annular boss; 1212. Slot; 1213. Through hole; 122. Welding position; 13. Connecting plate; 14. Gap; 2. Protective component; 20. Protective cavity; 21. Limiting member; 22. Connecting member; 23. Protective ring; 3. Positive pole; 4. Positive ear; 5. Winding core assembly; 51. Center hole. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0052] It should be noted that, in the description of the present invention, terms such as "inside", "outside", "top", "bottom", and "upper" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] It should be noted that the battery of the present invention can be a cylindrical battery, a square shell battery, etc. Such adjustments and changes to the specific setting shape of the battery do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0055] The specific embodiment of the current collecting plate of the present invention is described in detail below by taking a cylindrical battery as an example.

[0056] See also Figure 1 , Figure 7 and Figure 8 , Figure 1 is a schematic structural diagram of a current collecting plate for a battery according to the present invention, Figure 7 is a schematic diagram of the structure of the battery of the present invention, Figure 8 yes Figure 7 Schematic diagram of the local structure of the cross-sectional view along the CC line.

[0057] like Figure 1 , Figure 7 and Figure 8 As shown, the battery of the present invention includes a positive electrode column 3 , and the current collecting plate of the present invention includes a body 1 and a protective member 2 .

[0058] like Figure 1 , Figure 7 and Figure 8 As shown, a side of the body 1 of the present invention close to the positive electrode column 3 can be welded to the positive electrode column 3, a side of the body 1 away from the positive electrode column 3 has a welding position 122, a protective component 2 is arranged on a side of the body 1 away from the positive electrode column 3, the protective component 2 has a protective cavity 20 adapted to the welding position 122, an end of the protective cavity 20 is connected to the welding position 122, so that the welding needle passes through the protective cavity 20 and reaches the welding position 122 to weld the body 1 to the positive electrode column 3, and the protective component 2 abuts against the body 1 so as to collect the welding slag generated by the welding of the body 1 and the positive electrode column 3 into the protective cavity 20.

[0059] Through such an arrangement, a protective component 2 is provided at the welding position 122 corresponding to the main body 1 of the current collecting plate, and the protective component 2 has a protective cavity 20, so that when the positive electrode column 3 and the main body 1 are welded, the welding needle can pass through the protective cavity 20 and reach the welding position 122 on the main body 1. Since the welding needle is always located in the protective cavity 20 during the welding process, the welding slag generated during the welding process will be collected in the protective cavity 20, so as to prevent the welding slag from falling into the interior of the battery, thereby greatly improving the safety of the battery.

[0060] It should be noted that the welding position 122 in the present invention refers to the position where the body 1 contacts the welding pin when the current collecting plate and the positive electrode column 3 are welded.

[0061] It should be noted that, in actual applications, those skilled in the art may configure the protective component 2 as a protective block, wherein a protective cavity 20 is opened in the protective block, or may configure the protective component 2 as an annular protective part, wherein a protective cavity 20 is formed on the inner side of the annular protective part, and so on. Such adjustments and changes to the specific setting type of the protective component 2 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0062] Preferably, if Figure 1 As shown, the protective member 2 of the present invention is an annular protective member.

[0063] It should be noted that, in actual applications, those skilled in the art may place the protective component 2 directly against the main body 1, or, an annular groove may be provided at a position of the main body 1 corresponding to the positive electrode column 3, and the annular groove extends toward a side away from the positive electrode column 3 to form an annular boss, and the protective component 2 rests on the annular boss, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0064] Continue reading Figure 1 , and then see Figures 2 to 5 , Figure 2 yes Figure 1 Schematic diagram of the structure after the protective components are hidden Figure 1 , Figure 3 yes Figure 2 A partial enlarged schematic diagram of point A in the middle. Figure 4 yes Figure 1 Schematic diagram of the structure after the protective components are hidden Figure 2 , Figure 5 yes Figure 4 A local enlarged schematic diagram of point B in the middle.

[0065] Preferably, if Figures 1 to 5 As shown, the main body 1 is provided with an annular groove 121 at a position corresponding to the positive electrode column 3, and the annular groove 121 extends in a direction away from the positive electrode column 3 to form an annular boss 1211, and the welding position 122 is formed on the inner side of the annular boss 1211, and the protective component 2 rests on the annular boss 1211.

[0066] Through such an arrangement, compared with the form of directly abutting the protective component 2 against the bottom surface of the main body 1, an annular groove 121 and an annular boss 1211 are formed on the main body 1, so that the protective component 2 abuts against the annular boss 1211, so that the welding position 122 is formed on the inner side of the annular boss 1211. On the one hand, it is convenient to position the welding position 122, so that the welding position of the current collecting plate and the positive electrode column 3 is more precise, thereby improving the welding accuracy of the battery. On the other hand, it is convenient to position the installation of the protective component 2, so as to ensure that the welding slag generated by the welding of the current collecting plate and the positive electrode column 3 is all collected in the protective cavity 20, thereby further improving the safety of the battery.

[0067] It should be noted that, in actual applications, those skilled in the art may set the cross-section of the protective component 2 to a circular ring structure, and accordingly, set the annular boss 1211 to a circular ring structure, or, set the cross-section of the protective component 2 to a rectangular ring structure, and accordingly, form a rectangular ring boss on the main body 1, or, set the cross-section of the protective component 2 to an elliptical ring structure, and accordingly, form an elliptical ring boss on the main body 1, and so on. Such flexible adjustments and changes do not deviate from the shape of the present invention, and the adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0068] Continue reading Figure 1 , and then see Figure 6 , Figure 6 It is a schematic structural diagram of the protective component of the present invention.

[0069] Preferably, if Figure 1 and Figure 6 As shown, the cross section of the protective component 2 of the present invention is a circular ring structure, and a circular ring boss is formed on the main body 1.

[0070] Through such a setting, compared with setting the cross-section of the protective member 2 as a rectangular ring structure or an elliptical ring structure, setting the cross-section of the protective member 2 as a circular ring structure can make the volume of the protective member 2 smaller. When assembling with the battery, the protective member 2 can be extended into the center hole 51 of the winding core assembly 5 to avoid the protective member 2 occupying the internal space of the battery, thereby avoiding affecting the energy density of the battery.

[0071] It should be noted that, in actual applications, those skilled in the art may arrange the annular boss 1211 to be formed by stamping the main body 1, or may arrange an opening in the center of the main body 1 and weld the annular boss 1211 to the opening on the main body 1 to form the annular boss 1211 on the main body 1, and so on. Such adjustments and changes to the specific forming method of the annular boss 1211 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0072] Preferably, the annular boss 1211 of the present invention is formed by stamping the body.

[0073] It should be noted that, in actual applications, those skilled in the art may configure the protective component 2 only as a protective ring, by bonding the protective component 2 to the annular boss 1211 so that the protective ring abuts against the annular boss 1211, or, the protective component 2 may be configured as a protective ring, a connecting member and a limiting member, wherein the limiting member is located in the annular groove 121, a through hole is provided on the annular boss 1211, one end of the connecting member is connected to the limiting member, and the other end of the connecting member passes through the through hole and is connected to the protective ring so that the protective ring abuts against the annular boss 1211, and so on. Such adjustments and changes to the specific connection method between the protective component 2 and the annular boss 1211 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0074] like Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, a through hole 1213 is provided on the annular boss 1211 of the present invention, and the protective component 2 includes a protective ring 23, a connecting member 22 and a limiting member 21. A protective cavity 20 is formed inside the protective ring 23, and the limiting member 21 is located in the annular groove 121. One end of the connecting member 22 is connected to the limiting member 21, and the other end of the connecting member 22 passes through the through hole 1213 and is connected to the protective ring 23, so that the protective ring 23 rests on the annular boss 1211.

[0075] Through such a configuration, compared with the form in which the protective component 2 is bonded to the annular boss 1211 by gluing, the protective component 2 is configured in the form of a limiter 21, a connector 22 and a protective ring, so that the protective ring 23 can be stably abutted against the annular boss 1211, thereby preventing the protective ring 23 from falling off during welding and causing welding slag to fall into the battery. At the same time, it can also prevent the protective ring 23 from falling off during the use of the battery, thereby improving the connection stability between the protective component 2 and the main body 1, and further improving the safety of the battery.

[0076] It should be noted that, when installed, the height of the stopper 21 is lower than the depth of the annular groove 121 to prevent the stopper 21 from being too high and affecting the welding between the body 1 and the positive electrode column 3 .

[0077] It should also be noted that, in actual applications, those skilled in the art may set the number of through holes 1213 to one, and accordingly, the number of connectors 22 is also one, or the number of through holes 1213 may be set to two, and accordingly, the number of connectors 22 is also two, or the number of through holes 1213 may be set to multiple, and accordingly, the number of connectors 22 is also multiple, and so on. Such adjustments and changes to the specific setting numbers of through holes 1213 and connectors 22 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0078] Preferably, if Figure 3 , Figure 5 and Figure 6 As shown, there are multiple through holes 1213 , and the multiple through holes 1213 are distributed at intervals along the circumference of the annular boss 1211 .

[0079] By setting the number of through holes 1213 to be multiple, it is possible to avoid having too few connection points between the protective ring 23 and the limiting member 21 due to too few through holes 1213, thereby avoiding affecting the connection stability between the protective ring 23 and the limiting member 21, avoiding the problem of the protective ring 23 falling off due to unstable connection of the protective ring 23, and improving the protective effect of the protective ring 23 during welding.

[0080] For example, Figure 3 and Figure 5 As shown, the number of through holes 1213 in the present invention is six.

[0081] It should be noted that, in practical applications, those skilled in the art may set the specific number of through holes 1213 based on experience, or may set the specific number of through holes 1213 based on experiments, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0082] Preferably, the specific number of the through holes 1213 is set according to experiments.

[0083] Specifically, it is found through research that the number of through holes 1213 provided depends on the actual flow capacity of the current collecting plate.

[0084] Since the through hole 1213 is opened on the annular boss 1211, the flow capacity of the collecting plate on the table surface of the annular boss 1211 will be affected. At the position where the through hole 1213 is opened, there will be a position where the through hole 1213 has the greatest impact on the flow capacity of the collecting plate, which is recorded as the weakest position of the collecting plate.

[0085] The current flow capacity at the weakest position of the current collecting plate is the weakest position on the entire current collecting plate. Therefore, as long as the actual current flow capacity at the weakest position of the current collecting plate is greater than the maximum current flow capacity of the battery design, the current collecting plate can meet the design requirements of the battery.

[0086] For example, assuming that the cell capacity is A (in AH), the fast charge rate is C, and the current capacity of the collector is B (in AH / mm 2 ), after testing, the radius of the circle corresponding to the weakest position of the annular boss 1211 is r (in mm), the number of through holes 1213 corresponding to the weakest position of the collector plate is N, the arc length of the through hole corresponding to the weakest position of the collector plate (i.e., the arc length of the part where the circle at the weakest position of the collector plate and a single through hole overlap) is H (in mm), and the thickness of the collector plate is F (in mm);

[0087] The actual flow capacity of the weakest position of the collector plate (in AH) is:

[0088] (2×π×rN×H)×F×B;

[0089] The designed maximum current capacity of the battery (in AH) is: A×C;

[0090] When setting the number of through holes 1213, while ensuring the structural strength of the collecting plate, it is also necessary to ensure that the actual current carrying capacity of the weakest position of the collecting plate is greater than or equal to the designed maximum current carrying capacity of the battery, that is, when (2×π×rN×H)×F×B≥A×C is satisfied, the value of N that can be taken is the number of through holes 1213 that can actually be opened.

[0091] It should be noted that, in practical applications, those skilled in the art can determine the weakest position on the current collecting plate based on experiments, and determine the arc length of the through hole 1213 corresponding to the weakest position.

[0092] It should also be noted that, in actual applications, those skilled in the art may set the through hole 1213 to be a circular hole, or, may set the through hole 1213 to be a rectangular hole, or, may set the through hole 1213 to be any other possible shape, etc. Such adjustments and changes to the specific setting shape of the through hole 1213 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0093] Preferably, the through hole 1213 of the present invention is as follows Figure 3 Shape shown.

[0094] In practical applications, those skilled in the art may configure the connecting member 22 as a connecting rod, or may configure the connecting member 22 as a connecting plate, etc. Such adjustments and changes to the specific setting type of the connecting member 22 do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0095] Preferably, the connecting member 22 is a connecting rod, and the cross section of the connecting rod 22 is adapted to the shape of the through hole 1213 .

[0096] It should be noted that, in actual applications, those skilled in the art may set the cross-section of the connector 22 to a rod shape that matches the shape of the through hole 1213, and the cross-sectional shape of the connector 22 may also be any other possible shape, such as a circle, etc. Such adjustments and changes to the specific shape of the connector 22 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0097] Of course, preferably, the cross section of the connecting member 22 matches the shape of the through hole 1213 .

[0098] Through such a configuration, the connecting piece 22 can fill the through hole 1213, avoiding a gap between the connecting piece 22 and the inner wall of the through hole 1213, preventing the protective component 2 from shaking when it is protecting, and improving the connection stability between the protective component 2 and the annular boss 1211.

[0099] It should be noted that, in actual applications, those skilled in the art may set the limit member 21 as a limit block, or, may set the limit member 21 as a limit block that matches the shape of the annular groove 121. Such adjustments and changes to the specific structural form of the limit member 21 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0100] Preferably, if Figure 6 As shown, the limiting member 21 is a limiting block that matches the shape of the annular groove 121 .

[0101] Through such an arrangement, the connection between the limiting member 21 and the connecting member 22 can be made more stable, thereby preventing the protective member 2 from moving when the protective member 2 is protecting, thereby improving the connection stability between the protective member 2 and the annular boss 1211.

[0102] It should be noted that, in actual applications, those skilled in the art may configure the two ends of the connecting member 22 to be bonded or snap-connected to the limit member 21 and the protective ring 23 respectively, or, one end of the connecting member 22 may be configured to be bonded or snap-connected to one of the limit member 21 and the protective ring 23, and the other end of the connecting member 22 may be configured to be integrally formed with the other of the limit member 21 and the protective ring 23, or, the connecting member 22 may be configured to be integrally formed with both the limit member 21 and the protective ring 23, and so on. Such adjustments and changes to the specific connection methods among the connecting member 22, the protective ring 23 and the limit member 21 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0103] like Figure 6 As shown, the connecting member 22 and the protective ring 23 are integrally formed, and the connecting member 22 and the limiting member 21 are integrally formed.

[0104] Through such a setting, compared with setting the connecting piece 22 to be bonded or clamped with the limiting piece 21 and the protective ring 23, setting the connecting piece 22, the protective ring 23 and the limiting piece 21 as an integrally formed manner can make the overall structure of the protective component 2 more complete and the overall structural strength higher, thereby further improving the stability of the protective component 2 and better preventing the protective ring 23 from falling off the annular boss 1211.

[0105] Specifically, the main body 1 is firstly stamped and formed, and then the protective component 2 is connected to the main body 1 by injection molding, so as to form a protective ring 23 on the annular boss 1211 of the main body 1 .

[0106] It should be noted that, in actual applications, those skilled in the art may directly place the protective ring 23 against the annular boss 1211, or, may provide a slot on the annular boss 1211, with the protective ring 23 resting in the slot, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0107] Preferably, if Figure 3 As shown, a slot 1212 matched with the protection ring 23 is provided on the annular boss 1211 . When installed, the protection ring 23 is located in the slot 1212 .

[0108] By clamping the protective ring 23 in the clamping groove 1212, the connection position between the protective ring 23 and the connecting piece 22 can be strengthened, avoiding the connection between the protective ring 23 and the connecting piece 22 from being broken due to stress, and further improving the connection stability between the protective ring 23 and the annular boss 1211.

[0109] It should be noted that, in actual applications, those skilled in the art may set the slot 1212 to be an annular groove stamped on the annular boss 1211, or may set two concentric annular blocks on the annular boss 1211 to form the slot 1212 on the annular boss 1211, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0110] Preferably, the slot 1212 is an annular groove punched on the annular boss 1211 .

[0111] It should be noted that, in actual applications, those skilled in the art may configure the protective ring 23 only to be able to collect the welding slag generated by welding in the protective cavity 20, or, may configure the protective ring 23 to be able to collect the welding slag generated by welding in the protective cavity 20 to prevent the welding slag from splashing, and at the same time to adhere the welding slag to the protective cavity 20, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0112] In a specific embodiment, the protection ring 23 is only configured to collect welding slag generated by welding in the protection cavity 20 .

[0113] Specifically, when the main body 1 and the positive electrode column 3 are subjected to ultrasonic torque welding, the positions of the current collecting plate and the positive electrode column 3 can be inverted, that is, the positive electrode column 3 is placed below, the main body 1 is placed above the positive electrode column 3, and the protective ring 23 is located above the main body 1.

[0114] In this case, the welding needle passes through the protective cavity 20 and reaches the welding position 122 to weld the main body 1 and the positive electrode column 3 together. The welding slag generated by the welding is collected in the protective cavity 20 to prevent the welding slag from splashing. After the welding is completed, liquid glue is added into the protective cavity 20. After the liquid glue solidifies, the welding slag is bonded to the protective cavity 20, thereby preventing the welding slag from falling into the battery when assembling the battery, thereby avoiding the problem of internal short circuit of the battery and improving the performance of the battery.

[0115] In another specific embodiment, the protection ring 23 is configured to collect the welding slag generated by welding in the protection cavity 20 to prevent the welding slag from splashing, and at the same time, to adhere the welding slag to the protection cavity 20.

[0116] Specifically, the protective component 2 also includes an adhesive layer (not shown in the figure), which is arranged on the inner wall of the protective cavity 20. When the main body 1 and the positive electrode column 3 are subjected to ultrasonic torque welding, the welding needle passes through the protective cavity 20 and reaches the welding position 122 to weld the main body 1 and the positive electrode column 3 together. When the welding slag is splashed onto the inner wall of the protective cavity 20, it can be adhered by the adhesive layer to prevent the welding slag from falling.

[0117] By providing an adhesive layer inside the protective component 2, the welding slag generated by the welding of the welding body 1 and the positive electrode column 3 can be adhered to the adhesive layer, avoiding the risk of the welding slag falling into the battery due to unclean cleaning and causing a short circuit inside the battery, thereby further improving the safety of the battery.

[0118] It should be noted that, in actual applications, those skilled in the art may configure the main body 1 as an integral connecting piece, or may configure the main body 1 as a connecting disk 12, an outer ring piece 11, and a connecting piece 13 arranged between the connecting disk 12 and the outer ring piece 11, etc. Such adjustments and changes to the specific setting type of the main body 1 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0119] Preferably, if Figure 1 , Figure 2 and Figure 4 As shown, the main body 1 includes a connecting disk 12, a connecting sheet 13 and an outer ring sheet 11. The outer ring sheet 11 is arranged on the outside of the connecting disk 12. The connecting sheet 13 is located between the connecting disk 12 and the outer ring sheet 11 and its two ends are electrically connected to the connecting disk 12 and the outer ring sheet 11 respectively. A welding position 122 is formed on the connecting disk 12, and the protective component 2 is arranged on the side of the connecting disk 12 away from the positive electrode column 3.

[0120] By configuring the main body 1 to be interconnected with a connecting plate 12, a connecting plate 13 and an outer ring plate 11, a gap can be created between the connecting plate 12 and the outer ring plate 11, thereby increasing the infiltration channel of the electrolyte, improving the infiltration effect of the battery, and further improving the overall performance of the battery.

[0121] It should be noted that, in practical applications, those skilled in the art may configure the two ends of the connecting plate 13 to be welded to the connecting disk 12 and the outer ring plate 11, or may configure the connecting plate 13 to be integrally formed with the connecting disk 12 and the outer ring plate 11, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0122] Preferably, the connecting piece 13 of the present invention is integrally formed with the connecting disk 12 and the outer ring piece 11 .

[0123] Through such an arrangement, it is possible to avoid the occurrence of weak connection positions between the connecting piece 13 and the connecting disk 12 and between the connecting piece 13 and the outer ring piece 11, thereby improving the stability of the main body 1 and thus improving the stability of the battery.

[0124] It should be noted that, in actual applications, those skilled in the art may set the number of connecting plates 13 to only one, or may set the number of connecting plates 13 to multiple, and so on. Such adjustments and changes to the specific setting number of connecting plates 13 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0125] Preferably, if Figure 1 , Figure 2 and Figure 4 As shown, the number of the connecting plates 13 of the present invention is multiple, and the multiple connecting plates 13 are distributed at intervals along the circumference of the inner ring plate 12.

[0126] For example, Figure 1 As shown, in a specific implementation case of the present invention, the number of the connecting sheets 13 is four, and a gap 14 is formed between two adjacent connecting sheets 13 .

[0127] It should be noted that, in actual applications, those skilled in the art may set the connecting piece 13 to be straight, or may set the connecting piece 13 to be curved, etc. Such adjustments and changes to the specific setting shape of the connecting piece 13 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0128] Preferably, if Figure 1 , Figure 2 and Figure 4 As shown, the connecting piece 13 of the present invention is bent toward the positive electrode column 3 .

[0129] By bending the connecting piece 13 toward the positive electrode column 3, on the one hand, the length of the connecting piece 13 is increased, thereby improving the shock absorbing effect of the connecting piece 13; on the other hand, the connecting piece 13 is made arched, which improves the structural strength of the connecting piece 13, avoids the connecting piece 13 from breaking when it is vibrated, and improves the structural stability of the main body 1.

[0130] The present invention also provides a battery, which includes the current collecting plate for the battery as described above.

[0131] like Figure 7 and Figure 8 As shown, the battery of the present invention comprises a winding core assembly 5 , wherein the winding core assembly 5 has a central hole 51 , and the protective member 2 is located in the central hole 51 when installed.

[0132] Specifically, Figure 8 As shown, the outer diameter d1 of the protection ring 23 is smaller than the aperture d2 of the central hole 51 of the winding core assembly 5 , so that the protection ring 23 is located in the central hole 51 .

[0133] It should be noted that the protective component 2 is not limited to being set in the center hole 51 of the core assembly 5. For example, the protective component 2 can also be set between the core assembly 5 and the collecting plate, etc. Such adjustments and changes to the specific setting position of the protective component 2 do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0134] Of course, it is preferred that the protection member 2 is disposed in the central hole 51 of the winding core assembly 5 .

[0135] Through such an arrangement, on the one hand, when the collecting plate and the battery are assembled, the protective component 2 can be located in the central hole 51 of the winding core 5, so as to avoid the protective component 2 occupying the internal space of the battery and reducing the space utilization rate inside the battery, thereby avoiding affecting the energy density of the battery; on the other hand, the height of the protective ring 23 can be unaffected by the winding core assembly 5, thereby arbitrarily adjusting the height of the protective ring 23 to meet actual welding needs.

[0136] It should be noted that, in actual applications, technicians in this field can adaptively adjust the height and thickness of the protective ring 23 according to actual needs. Such adjustments and changes to the height and thickness of the protective ring 23 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0137] Preferably, the thickness of the protection ring 23 is 0.2-1 mm, and more preferably, the thickness of the protection ring 23 is 0.5 mm.

[0138] Through such a setting, on the one hand, it is possible to avoid the thickness of the protection ring 23 being too small, which would lead to too low mechanical strength of the protection ring 23, thereby avoiding damage to the protection ring 23; on the other hand, it is possible to avoid insufficient welding space for the welding needle due to the thickness of the protection ring 23 being too large, thereby avoiding affecting the welding effect.

[0139] Preferably, if Figure 8 As shown, when the battery of the present invention is assembled, the positive electrode ear 4 of the battery is electrically connected to the body 1 by welding, and the positive electrode column 3 of the battery is electrically connected to the body 1 by welding.

[0140] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A current collector for a battery, the battery comprising a positive electrode column, characterized in that: The collecting plate comprises: A body, wherein a side of the body close to the positive electrode column can be welded to the positive electrode column, and a side of the body away from the positive electrode column has a welding position; and A protective component is arranged on a side of the body away from the positive electrode column, the protective component has a protective cavity adapted to the welding position, and the protective cavity is communicated with the welding position, The guard member abuts against the body.

2. The current collecting plate for a battery according to claim 1, characterized in that: The main body is provided with an annular groove at a position corresponding to the positive electrode column, the annular groove extends in a direction away from the positive electrode column to form an annular boss, the welding position is formed on the inner side of the annular boss, and the protective component abuts against the annular boss.

3. The current collecting plate for a battery according to claim 2, characterized in that: A through hole is provided on the annular boss, and the protective component includes a protective ring, a connecting piece and a limiting piece. The interior of the protective ring forms the protective cavity, the limiting piece is located in the annular groove, one end of the connecting piece is connected to the limiting piece, and the other end of the connecting piece passes through the through hole and is connected to the protective ring.

4. The current collecting plate for a battery according to claim 3, characterized in that: There are multiple through holes, and the multiple through holes are distributed at intervals along the circumference of the annular boss.

5. The current collecting plate for a battery according to claim 3, characterized in that: The connecting member is integrally formed with the protective ring; and / or The connecting member and the limiting member are integrally formed.

6. The current collecting plate for a battery according to claim 3, characterized in that: The annular boss is provided with a slot matched with the protective ring.

7. The current collecting plate for a battery according to any one of claims 1 to 6, characterized in that: The protection component further includes an adhesive layer, and the adhesive layer is arranged on the inner wall of the protection cavity.

8. The current collecting plate for a battery according to claim 1, characterized in that: The main body includes a connecting disk, a connecting plate and an outer ring plate, the outer ring plate is arranged on the outside of the connecting disk, the connecting plate is located between the connecting disk and the outer ring plate and its two ends are electrically connected to the connecting disk and the outer ring plate respectively, the welding position is formed on the connecting disk, and the protective component is arranged on the side of the connecting disk away from the positive electrode column.

9. A battery, characterized in that: A current collecting plate for a battery comprising any one of claims 1 to 8.

10. The battery according to claim 9, characterized in that The battery also includes a winding core assembly having a central hole, and the protective member is located in the central hole when installed.

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