Disclosure of Invention
In view of the above, the present invention provides a battery and a battery pack to solve the problem of poor uniformity of the width of the casing body in the prior art.
In a first aspect, the present invention provides a battery comprising: the riveting device comprises a main body, wherein a riveting hole is formed in the side face of the main body, the side face of the main body comprises a flat plate area and a riveting area, and the riveting hole is arranged corresponding to the riveting area; along the width direction of the side surface of the main body, the distance between the hole edge of the riveting hole and the edge of the side surface of the main body is b, the width of the flat plate area is T, the width of the riveting area is T2, and the requirements are thatWherein y is more than or equal to 10 and less than or equal to 14, and y is a real number.
The beneficial effects are that: the width of the main body corresponding to the riveting area is set to be slightly smaller than the width of the main body corresponding to the flat plate area, after the width of the main body corresponding to the riveting area is increased by riveting the pole assembly in the riveting hole, the width of the main body corresponding to the riveting area can be kept consistent with the width of the flat plate area, the consistency of the width of the main body is improved, the assembly effect of the main body and the rest parts is ensured, and the quality of a battery is improved.
In an alternative embodiment, the distance b between the hole edge of the rivet hole and the edge of the side face of the main body is 2mm to 10mm.
The beneficial effects are that: the pole assembly is guaranteed to be stably arranged on the main body, and meanwhile, the waste of materials is avoided.
In an alternative embodiment, the side surface of the main body is provided with a mounting hole, the side surface of the main body further comprises a welding area, and the mounting hole is arranged corresponding to the welding area.
The beneficial effects are that: through setting up the mounting hole and be used for welding explosion-proof valve, when the inside gas that produces of battery leads to the inside pressure of battery to rise, exhaust through explosion-proof valve, avoid the battery explosion.
In an alternative embodiment, the main body includes a cover plate or a housing, and the rivet hole is provided corresponding to the cover plate or the housing.
In an alternative embodiment, the edges of the cover plate are stepped.
The beneficial effects are that: the edge of the cover plate is arranged to be stepped, so that the cover plate and the opening of the shell can be positioned and assembled conveniently.
In an alternative embodiment, the width t= (13+b±z) mm of the plate region, wherein B is greater than or equal to 0, B is an increment of 13mm of the minimum process of the plate region width, B is in mm, z is greater than or equal to 0.03 and less than or equal to 0.08, z is a tolerance of the plate region width, and z is in mm.
In an alternative embodiment, the battery further includes a post assembly that is staked in correspondence with the staking hole.
In an alternative embodiment, the battery further includes an explosion-proof valve disposed in correspondence with the mounting hole and welded with the main body.
In an alternative embodiment, the battery further comprises a pole set disposed within the housing.
In a second aspect, the invention also provides a battery pack comprising the battery.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiments of the present invention are described below with reference to fig. 1 to 7.
According to an embodiment of the present invention, in one aspect, there is provided a battery including a main body 1. The side of the main body 1 is provided with a riveting hole 101, the side of the main body 1 comprises a flat plate area 102 and a riveting area 103, and the riveting hole 101 is arranged corresponding to the riveting area 103. Along the width direction of the side surface of the main body 1, the distance between the hole edge of the riveting hole 101 and the edge of the side surface of the main body 1 is b, the width of the flat plate area 102 is T, the width of the riveting area 103 is T2, and the requirements are thatWherein y is more than or equal to 10 and less than or equal to 14, and y is a real number.
The width of the main body 1 corresponding to the riveting area 103 is set to be slightly smaller than the width of the main body 1 corresponding to the flat plate area 102, after the width of the main body 1 corresponding to the riveting area 103 is increased by riveting the pole assembly 2 in the riveting hole 101, the width of the main body 1 corresponding to the riveting area 103 can be kept consistent with the width of the flat plate area 102, the consistency of the width of the main body is improved, the assembly effect of the main body and the rest parts is ensured, and the quality of a battery is improved.
In one embodiment, the body 1 comprises a cover plate or housing, and the staking holes 101 are provided corresponding to the cover plate or housing. Specifically, in this embodiment, as shown in fig. 1 to 7, the riveting holes 101 are provided corresponding to the cover plates, so, by setting the width of the cover plate corresponding to the riveting region 103 to be slightly narrower than the width of the cover plate corresponding to the flat plate region 102, after the pole assembly 2 is riveted, the width of the cover plate corresponding to the riveting region 103 is increased, thereby improving the consistency of the width of the cover plate and further improving the assembly effect of the cover plate and the housing.
Of course, in other alternative embodiments, the staking holes 101 may also be provided corresponding to the housing.
It should be noted that, the width T of the flat plate region 102 is the design width of the battery, and therefore, by setting the width of the side surface of the body 1 corresponding to the riveting region 103 to be T2, the width of the battery formed after the terminal assembly 2 is riveted on the body 1 tends to be the design width T. Specifically, in the present embodiment, the width T of the flat plate region 102 is the design width of the cover plate.
In this embodiment, the width t= (13+b±z) mm of the plate region 102, where B is greater than or equal to 0, B is an increment of 13mm of the minimum process of the width of the plate region 102, B is in mm, z is greater than or equal to 0.03 and less than or equal to 0.08, z is a tolerance of the width of the plate region 102, and z is in mm. That is, for a blade battery, the minimum process requirement for the width of the cover plate is 13mm.
It should be noted that, referring to fig. 2, the riveting hole 101 is a circular hole body, and a distance between an edge of one side of the side surface of the main body 1 and an edge of the riveting hole 101 closest to the side surface is b. Specifically, in the present embodiment, the distance between one side edge of the cover plate and the edge of the nearest caulking hole 101 is b.
B is a design value of a distance between a hole edge of the rivet hole 101 and an edge of the cover plate.
It is to be noted that the width T2 of the caulking section 103 is set toAfter the pole component 2 is riveted in the riveting hole 101 to cause the riveting area 103 to expand, y is more than or equal to 10 and less than or equal to 14, the width of the riveting area 103 tends to the width T of the flat plate area 102 as much as possible. If it isAfter the riveting area 103 is expanded by riveting the pole assembly 2 on the cover plate, the width of the riveting area 103 is larger than that of the flat plate area 102, so that the consistency of the width of the cover plate is still poor; ifAfter the riveting area 103 is expanded by riveting the pole assembly 2 on the cover plate, the width of the riveting area 103 is smaller than that of the flat plate area 102, which also results in poor consistency of the width of the cover plate.
In one embodiment, the distance b between the hole edge of the staking hole 101 and the edge of the side of the body 1 is 2mm to 10mm. That is, in the present embodiment, the distance b between the hole edge of the caulking hole 101 and the edge of the cover plate is 2mm to 10mm.
It should be noted that, when the distance between the hole edge of the riveting hole 101 and the edge of the cover plate is too small, the strength of the riveting area 103 cannot meet the requirement of mounting the pole assembly 2, so as to affect the overall quality of the battery; when the distance between the hole edge of the rivet hole 101 and the edge of the cover plate is too large, the width of the cover plate is increased, resulting in waste of materials.
It should be noted that, when the value of b is smaller, the larger the amount of expansion of the cover plate corresponding to the caulking region 103 is after caulking the pole assembly 2, and therefore, a larger adjustment amount for T is required.
In one embodiment, as shown in fig. 1 and 2, a mounting hole 104 is formed on a side surface of the main body 1, and the side surface of the main body 1 further includes a welding area 105, where the mounting hole 104 is disposed corresponding to the welding area 105. By providing the mounting hole 104 for welding the explosion-proof valve 3, when the internal pressure of the battery is raised due to the generation of gas inside the battery, the explosion of the battery is avoided by exhausting the gas through the explosion-proof valve 3. Specifically, in the present embodiment, the mounting hole 104 is formed in the cover plate.
In one embodiment, as shown in fig. 2 to 5, the distance between the hole edge of the mounting hole 104 and the edge of the side face of the main body 1 is a, and the width of the land 105 is T1, along the width direction of the side face of the main body 1, so thatWherein x is more than or equal to 8 and less than or equal to 12, and x is a real number.
By setting the width of the side surface of the main body 1 corresponding to the welding area 105 to be slightly wider than the width of the side surface of the main body 1 corresponding to the flat plate area 102, after the explosion-proof valve 3 is welded at the mounting hole 104, the width of the main body 1 corresponding to the welding area 105 is reduced, the width of the main body can be kept consistent with the width of the flat plate area 102, the consistency of the width of the main body is improved, the assembly effect of the main body and the rest parts is ensured, and the quality of the battery is improved.
It should be noted that, when the explosion-proof valve 3 is welded in the mounting hole 104, the cover plate itself is cooled and contracted, which easily results in a reduction in the width of the welding area 105, resulting in poor uniformity of the width of the cover plate. Therefore, in the present embodiment, the width of the cover plate corresponding to the welding area 105 is set to be slightly wider than the design width of the cover plate, and when the cover plate is assembled with the explosion-proof valve 3, the width of the welding area 105 is reduced under the welding action of the explosion-proof valve 3, so that the width of the cover plate is kept uniform throughout.
In one embodiment, the distance a between the hole edge of the mounting hole 104 and the edge of the side face of the main body 1 is > 1.5mm. Specifically, in the present embodiment, the distance a between the hole edge of the mounting hole 104 and the edge of the cover plate is > 1.5mm.
It should be further noted that a is a design value of the distance between the hole edge of the mounting hole 104 and the edge of the cover plate.
It should be noted that, when the distance between the hole edge of the mounting hole 104 and the edge of the cover plate is too small, the strength of the welding area 105 cannot meet the requirement of mounting the explosion-proof valve 3, and the overall quality of the cover plate is affected.
When the value of a is smaller, the cover plate shrinkage amount corresponding to the welding area 105 is larger after the explosion-proof valve 3 is welded, and therefore, a larger adjustment amount for T is required.
In one embodiment, as shown in fig. 3-5, the edges of the cover plate are stepped. Specifically, the cover plate includes an outer side plate 106 and an inner side plate 107, and the inner side plate 107 is connected to an inner side surface of the outer side plate 106 along a thickness direction of the cover plate, and an outer periphery of the outer side plate 106 protrudes from an outer periphery of the inner side plate 107 along a circumferential direction of the cover plate, so as to form a stepped structure at an outer peripheral edge of the cover plate. The edge of the cover plate is arranged to be stepped, so that the cover plate and the opening of the shell can be positioned and assembled conveniently.
It should be noted that, since the flat plate region 102, the welding region 105 and the riveting region 103 of the cover plate are arranged in different widths, the edge of the cover plate is in a special-shaped structure (i.e. nonlinear), and when the cover plate is assembled with the explosion-proof valve 3 and the pole assembly 2, the edge of the cover plate is made to approach to a linear type under the welding of the explosion-proof valve 3 and the riveting action of the pole assembly 2.
It should be noted that, as shown in fig. 1 to 6, the cover plate of the present embodiment may be a cover plate of a blade battery, specifically, a riveting hole 101 and a mounting hole 104 are formed on the cover plate, the riveting hole 101 is used for riveting the pole column assembly 2 (positive electrode or negative electrode), and the mounting hole 104 is used for welding the explosion-proof valve 3. Alternatively, as shown in fig. 7, the cover plate of the present embodiment may be a cover plate of a square battery, where two riveting holes 101 and a mounting hole 104 are formed in the cover plate, the two riveting holes 101 are disposed at intervals, the mounting hole 104 is located between the two riveting holes 101, the two riveting holes 101 are used for riveting the two pole assemblies 2 (positive electrode and negative electrode), and the mounting hole 104 is used for welding the explosion-proof valve 3.
The following were carried out for different widths before the cap plate is staked to the post assembly 2 and after the cap plate is staked to the post assembly 2, and the measurement results of examples and comparative examples are shown in tables 1 to 3. Wherein the cover plate of the embodiment refers to the width of the riveting zone 103 according to the embodimentWherein y is more than or equal to 10 and less than or equal to 14, and processing; the cover plate of the comparative example means that the width of the caulking section 103 is processed in accordance with the design width T.
Table 1 measurement results of example one and comparative example one
Table 2 measurement results of example two and comparative example two
Table 3 measurement results of example three and comparative example three
As can be seen from table 1, in the first embodiment, t=18±0.05mm, b=2.5 mm, the width T2 of the caulking area 103 is set in the range of 17.960 to 17.972 before the pole assembly 2 is caulked, and after the pole assembly 2 is caulked, the width T2 of the caulking area 103 is increased, so that the values of T2 and T3, T4 and T5 tend to be consistent, and thus the actual measurement value difference of the width of the cover plate after the pole assembly 2 is set in the range of ±0.01mm, that is, the width consistency of the cover plate is good.
As can be seen from table 2, in the second embodiment, t=18±0.05mm, b=3.5 mm, the width T2 of the caulking area 103 is set within a range of 17.971 to 17.980 before the pole assembly 2 is caulked, and after the pole assembly 2 is caulked, the width T2 of the caulking area 103 is increased, so that the values of T2 and T3, T4 and T5 tend to be consistent, and thus the actual measurement value difference of the width of the cover plate after the pole assembly 2 is set within a range of ±0.01mm, that is, the width consistency of the cover plate is good.
As can be seen from table 3, in the third embodiment, t=18±0.05mm, b=5 mm, the width T2 of the caulking area 103 is set in the range of 17.980 to 17.986 before the pole assembly 2 is caulking, and after the pole assembly 2 is caulking, the width T2 of the caulking area 103 is increased, so that the values of T2 and T3, T4 and T5 tend to be consistent, and thus the actual measurement value difference of the width of the cover plate after the pole assembly 2 is caulking is within the range of ±0.01mm, that is, the width consistency of the cover plate is good.
In the first to third comparative examples, the width T2 of the caulking region 103 and the respective widths T3, T4 and T5 of the flat plate region 102 tended to coincide before caulking the pole assembly 2, however, the width T2 of the caulking region 103 increased after caulking the pole assembly 2, resulting in a difference in measured values of the respective widths of the cap plate after caulking the pole assembly 2 exceeding ±0.01mm, that is, a poor width consistency of the cap plate.
It should be noted that referring to fig. 2, in tables 1 to 3, T4 and T5 correspond to the widths of different positions of the plate area 102, respectively.
It should be noted that the value of b may be specifically set according to the actual design requirement.
In one embodiment, as shown in fig. 6, the battery further includes a post assembly 2, and the post assembly 2 is riveted corresponding to the rivet hole 101.
In one embodiment, as shown in fig. 6, the battery further includes an explosion-proof valve 3, and the explosion-proof valve 3 is disposed in correspondence with the mounting hole 104 and welded with the cap plate.
In one embodiment, the battery further comprises a pole group disposed within the housing.
According to an embodiment of the present invention, in another aspect, there is also provided a battery pack including the above battery.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.