CN117691267A - Battery and battery pack - Google Patents

Battery and battery pack Download PDF

Info

Publication number
CN117691267A
CN117691267A CN202410154828.6A CN202410154828A CN117691267A CN 117691267 A CN117691267 A CN 117691267A CN 202410154828 A CN202410154828 A CN 202410154828A CN 117691267 A CN117691267 A CN 117691267A
Authority
CN
China
Prior art keywords
width
main body
battery
cover plate
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202410154828.6A
Other languages
Chinese (zh)
Other versions
CN117691267B (en
Inventor
沈良军
李俭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Svolt Energy Technology Co Ltd
Original Assignee
Svolt Energy Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Svolt Energy Technology Co Ltd filed Critical Svolt Energy Technology Co Ltd
Priority to CN202410154828.6A priority Critical patent/CN117691267B/en
Publication of CN117691267A publication Critical patent/CN117691267A/en
Application granted granted Critical
Publication of CN117691267B publication Critical patent/CN117691267B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

The invention relates to the technical field of batteries, and discloses a battery and a battery pack, wherein the battery comprises: the device comprises a main body, wherein a mounting hole is formed in the side surface of the main body, the side surface of the main body comprises a flat plate area and a welding area, and the mounting hole is arranged corresponding to the welding area; along the width direction of the side surface of the main body, the distance between the hole edge of the mounting hole and the edge of the side surface of the main body is a, the width of the flat plate area is T, and the width of the welding area is T1. According to the invention, the width of the main body corresponding to the welding area is set to be slightly wider than that of the main body corresponding to the flat plate area, and after the explosion-proof valve is welded at the mounting hole, the width of the main body corresponding to the welding area is reduced, the main body can be kept consistent with that of the flat plate area, so that the consistency of the main body width is improved, the assembly effect of the main body and the shell is ensured, and the quality of the battery is improved.

Description

Battery and battery pack
Technical Field
The invention relates to the technical field of batteries, in particular to a battery and a battery pack.
Background
With the increasing maturity of battery technology, power batteries are widely applied to electric automobiles and energy storage fields, and the requirements on the service performance and safety of the batteries are increasing. The main body of the shell is a key accessory in the battery, and the main body of the shell is used for forming a sealed cavity, leading out positive and negative electrodes of the electrode group, serving as an assembly carrier and the like. When the battery fails, a large amount of combustible gas is generated in the battery, so that the internal air pressure of the battery is obviously increased, and the explosion of the battery is easily caused. For this reason, in order to prevent the explosion of the battery, an explosion-proof valve is generally provided in the case body. The explosion-proof valve is connected with the light aluminum plate in a welding mode generally, when the edge of the explosion-proof valve is close to the edge of the light aluminum plate, the light aluminum plate is cooled and contracted after the explosion-proof valve is welded, so that the width of the assembling steps on the two sides of the light aluminum plate corresponding to the welding position is reduced easily, and the consistency of the width of the shell main body is affected.
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 device comprises a main body, wherein a mounting hole is formed in the side surface of the main body, the side surface of the main body comprises a flat plate area and a welding area, and the mounting hole is arranged corresponding to the welding area; along the width direction of the side surface of the main body, the distance between the hole edge of the mounting hole and the edge of the side surface of the main body is a, the width of the flat plate area is T, the width of the welding area is T1, and the requirements are thatWherein x is more than or equal to 8 and less than or equal to 12, and x is a real number.
The beneficial effects are that: the width of the main body corresponding to the welding area is set to be slightly wider than the width of the main body corresponding to the flat plate area, after the explosion-proof valve is welded at the mounting hole, the width of the main body corresponding to the welding area is reduced, the main body can be kept consistent with the width of the flat plate area, the consistency of the main body width 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 a between the hole edge of the mounting hole and the edge of the side face of the main body is > 1.5mm.
In an alternative embodiment, the side surface of the main body is provided with a riveting hole, and the side surface of the main body further comprises a riveting area, and the riveting hole is arranged corresponding to the riveting area.
The beneficial effects are that: through setting up the riveting hole, the utmost point post subassembly of being convenient for assembles on the main part.
In an alternative embodiment, the distance between the hole edge of the rivet hole and the edge of the side surface of the main body is b along the width direction of the side surface of the main body, and the width of the rivet zone is T2, so 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.
In an alternative embodiment, the main body includes a cover plate or a housing, and the mounting 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 comprises a pole assembly, the pole assembly being riveted in correspondence with the rivet hole; and/or the battery further comprises an explosion-proof valve, wherein the explosion-proof valve is arranged corresponding to the mounting hole and is welded with the main body; and/or, the battery further comprises a pole group, and the pole group is arranged in the shell.
In a second aspect, the invention also provides a battery pack comprising the battery.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the overall structure of a cover plate according to an embodiment of the present invention;
FIG. 2 is a top view of the cover plate shown in FIG. 1;
FIG. 3 is a cross-sectional view of A-A of FIG. 2;
FIG. 4 is a cross-sectional view of B-B in FIG. 2;
FIG. 5 is a cross-sectional view of C-C of FIG. 2;
FIG. 6 is a schematic view of the overall structure of a cover plate, a post assembly and an explosion-proof valve of a blade battery according to an embodiment of the present invention;
fig. 7 is a schematic diagram showing the overall structure of a cover plate, a post assembly and an explosion-proof valve of a square-case battery according to an embodiment of the present invention.
Reference numerals illustrate:
1. a main body; 101. a mounting hole; 102. a flat plate region; 103. a welding area; 104. riveting holes; 105. a riveting zone; 106. an outer panel; 107. an inner side plate; 2. an explosion-proof valve; 3. and a pole assembly.
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 mounting hole 101, the side of the main body 1 comprises a flat plate area 102 and a welding area 103, and the mounting hole 101 is arranged corresponding to the welding area 103. The distance between the hole edge of the mounting hole 101 and the edge of the side surface of the main body 1 is a, the width of the flat plate area 102 is T, and the width of the welding area 103 is T1 along the width direction of the side surface of the main body 1, so that the following conditions are satisfiedWherein x is more than or equal to 8 and less than or equal to 12, and x is a real number.
The width of the main body 1 corresponding to the welding area 103 is set to be slightly wider than the width of the main body 1 corresponding to the flat plate area 102, after the explosion-proof valve 2 is welded at the mounting hole 101, the width of the main body 1 corresponding to the welding area 103 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 a battery is improved.
In one embodiment, the body 1 includes a cover plate or housing, and the mounting hole 101 is provided corresponding to the cover plate or housing. Specifically, in the present embodiment, as shown in fig. 1 to 7, the mounting hole 101 is provided corresponding to the cover plate, so that the width of the cover plate corresponding to the welding area 103 is set to be slightly wider than the width of the cover plate corresponding to the flat plate area 102, and after the explosion-proof valve 2 is welded, the width of the cover plate corresponding to the welding area 103 is reduced, so that the consistency of the width of the cover plate is improved, and the assembly effect of the cover plate and the housing is further improved.
Of course, in other alternative embodiments, the mounting holes 101 may also be provided corresponding to the housing.
It should be noted that, the width T of the flat plate area 102 is the design width of the battery, and therefore, by setting the width of the side surface of the main body 1 corresponding to the welding area 103 to be T1, the width of the battery formed after the explosion-proof valve 2 is welded on the main 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 mounting hole 101 is an oblong hole body, and specifically, the mounting hole 101 has two semicircular arc sections and two straight line sections, where the two semicircular arc sections are disposed at opposite intervals, and the two straight line sections are connected between the two semicircular arc sections. The straight line segments are arranged in parallel with the edge of the main body 1, and the distance between each straight line segment and the edge of one side of the main body 1 corresponding to each straight line segment is a.
It should be further noted that a is a design value of the distance between the hole edge of the mounting hole 101 and the edge of the cover plate.
It is to be noted that the width T1 of the land 103 is set toX is more than or equal to 8 and less than or equal to 12, so that the width of the welding area 103 tends to the width T of the flat plate area 102 as much as possible after the welding area 103 of the welding explosion-proof valve 2 is contracted. If->When the welding area 103 of the welded explosion-proof valve 2 on the cover plate is contracted, the width of the welding 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; if->When the welding area 103 of the explosion-proof valve 2 welded on the cover plate is contracted, the width of the welding area 103 is smaller than that of the flat plate area 102, and the uniformity of the width of the cover plate is poor.
In one embodiment, the distance a between the hole edge of the mounting hole 101 and the edge of the side face of the main body 1 is > 1.5mm. That is, in the present embodiment, the distance a between the hole edge of the mounting hole 101 and the edge of the cover plate is > 1.5mm.
It should be noted that, when the distance between the hole edge of the mounting hole 101 and the edge of the cover plate is too small, the strength of the welding area 103 cannot meet the requirement of mounting the explosion-proof valve 2, and the overall quality of the battery is affected.
When the value of a is smaller, the cover plate shrinkage amount corresponding to the welding area 103 is larger after the explosion-proof valve 2 is welded, and therefore, a larger adjustment amount for T is required.
In one embodiment, as shown in fig. 1 and 2, a riveting 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 riveting area 105, where the riveting hole 104 is disposed corresponding to the riveting area 105. By providing the staking holes 104, the pole assembly 3 is facilitated to be assembled to the body. Specifically, in the present embodiment, the riveting hole 104 is formed on the cover plate.
In one embodiment, as shown in fig. 2 to 5, the distance between the hole edge of the caulking hole 104 and the edge of the side face of the main body 1 in the width direction of the side face of the main body 1 is b, and the width of the caulking region 105 is T2, satisfyingWherein 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 105 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 105 is increased by riveting the pole assembly 3 in the riveting hole 104, the width of the main body 1 corresponding to the riveting area 105 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 this embodiment, as shown in fig. 1 to 7, the riveting holes 104 are disposed corresponding to the cover plates, so, by setting the width of the cover plate corresponding to the riveting area 105 to be slightly narrower than the width of the cover plate corresponding to the flat plate area 102, after the pole assembly 3 is riveted, the width of the cover plate corresponding to the riveting area 105 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 104 may also be provided corresponding to the housing.
It should be noted that, by setting the width of the side of the body 1 corresponding to the caulking region 105 to be T2, the width of the battery formed after caulking the post assembly 3 on the body 1 tends to be the design width T.
It should be noted that, when the pole assembly 3 is riveted in the riveting hole 104, the pole assembly 3 may cause the cover plate corresponding to the riveting area 105 to expand, thereby increasing the width of the riveting area 105 and resulting in poor width uniformity of the cover plate. Therefore, in this embodiment, the width of the cover plate corresponding to the riveting area 105 is set to be slightly narrower than the design width of the cover plate, and after the cover plate is assembled with the pole assembly 3, the width of the riveting area 105 is increased under the action of the pole assembly 3, so that the width of the cover plate is kept uniform everywhere.
It should be noted that, referring to fig. 2, the riveting hole 104 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 104 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 104 is b.
It is to be noted that the width T2 of the caulking section 105 is set toAfter the pole component 3 is riveted in the riveting hole 104 to cause the riveting area 105 to expand, y is more than or equal to 10 and less than or equal to 14, the width of the riveting area 105 tends to the width T of the flat plate area 102 as much as possible. If it isAfter the riveting area 105 is expanded by riveting the pole assembly 3 on the cover plate, the width of the riveting area 105 is larger than that of the flat plate area 102, so that the consistency of the width of the cover plate is still poor; if->After the riveting area 105 is expanded by riveting the pole assembly 3 on the cover plate, the width of the riveting area 105 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 104 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 104 and the edge of the cover plate is 2mm to 10mm.
It should be noted that, referring to fig. 2, the riveting hole 104 is a circular hole body, and a distance between an edge of one side of the cover plate and an edge of the riveting hole 104 closest to the edge is b.
B is a design value of a distance between a hole edge of the rivet hole 104 and an edge of the cover plate.
It should be noted that, when the distance between the hole edge of the riveting hole 104 and the edge of the cover plate is too small, the strength of the riveting area 105 cannot meet the requirement of mounting the pole assembly 3, and the overall quality of the battery is affected; when the distance between the hole edge of the rivet hole 104 and the edge of the cover plate is too large, the width of the cover plate is increased, and the waste of materials is caused.
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 105 is after caulking the pole assembly 3, 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 103 and the riveting region 105 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 2 and the pole assembly 3, the edge of the cover plate is made to approach to a linear type under the welding of the explosion-proof valve 2 and the riveting action of the pole assembly 3.
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 104 and a mounting hole 101 are formed on the cover plate, the riveting hole 104 is used for riveting the pole column assembly 3 (positive electrode or negative electrode), and the mounting hole 101 is used for welding the explosion-proof valve 2. 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 104 and a mounting hole 101 are formed in the cover plate, the two riveting holes 104 are disposed at intervals, the mounting hole 101 is located between the two riveting holes 104, the two riveting holes 104 are used for riveting the two pole assemblies 3 (positive electrode and negative electrode), and the mounting hole 101 is used for welding the explosion-proof valve 2.
The widths before welding the explosion-proof valve 2 and after welding the explosion-proof valve 2 to different cover plates were measured as follows, 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 welding area 103 according to the embodimentWherein x is more than or equal to 8 and less than or equal to 12, and processing; the cover plate of the comparative example means that the width of the land 103 is processed in accordance with the design width T.
Table 1 measurement results of example one and comparative example one before and after welding the explosion-proof valve 2
Table 2 measurement results of example two and comparative example two before and after welding the explosion-proof valve 2
Table 3 measurement results of example three and comparative example three before and after welding the explosion-proof valve 2
As can be seen from table 1, in the first embodiment, t=17±0.05mm, a=2.5 mm, the width T1 of the welding area 103 is set within the range of 17.033 to 17.05 before the explosion-proof valve 2 is welded, and the width T1 of the welding area 103 is reduced after the explosion-proof valve 2 is welded, so that the values of T1 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 explosion-proof valve 2 is welded is within 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=17±0.05mm, a=3.5 mm, the width T1 of the welding area 103 is set within the range of 17.024 to 17.036 before the explosion-proof valve 2 is welded, and the width T1 of the welding area 103 is reduced after the explosion-proof valve 2 is welded, so that the values of T1 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 explosion-proof valve 2 is welded is within the 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=17±0.05mm, a=5 mm, the width T1 of the welding area 103 is set within the range of 17.017 to 17.025 before the explosion-proof valve 2 is welded, and the width T1 of the welding area 103 is reduced after the explosion-proof valve 2 is welded, so that the values of T1 and T3, T4 and T5 tend to be consistent, and the actual measurement value difference of the width of the cover plate after the explosion-proof valve 2 is welded is within the range of ±0.01mm, that is, the width consistency of the cover plate is good.
As can be seen from tables 1 to 3, while in comparative examples one to three, the width T1 of the welding zone 103 and the respective widths T3, T4 and T5 of the flat plate zone 102 tended to coincide before the explosion-proof valve 2 was welded, however, the width T1 of the welding zone 103 was reduced after the explosion-proof valve 2 was welded, resulting in that the difference in the measured value of the respective widths of the cover plate after the explosion-proof valve 2 was welded exceeded ±0.01mm, that is, it was demonstrated that the width consistency of the cover plate was poor.
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 a can be specifically set according to the actual design requirement.
The widths before and after the different cap plates are staked to the pole assembly 3 are measured as follows, and the measurement results of examples and comparative examples are shown in tables 4 to 6. Wherein the cover plate of the embodiment refers to the width of the riveting zone 105 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 105 is processed in accordance with the design width T.
Table 4 measurement results of example one and comparative example one before and after the staking of the post assembly 3
Table 5 measurement results of example two and comparative example two before and after staking the post assembly 3
Table 6 measurement results of example three and comparative example three before and after staking the post assembly 3
As can be seen from table 4, in the first embodiment, t=18±0.05mm, b=2.5 mm, the width T2 of the caulking zone 105 is set within the range of 17.960 to 17.972 before the pole assembly 3 is caulked, and after the pole assembly 3 is caulked, the width T2 of the caulking zone 105 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 3 is set within the range of ±0.01mm, that is, the width consistency of the cover plate is good.
As can be seen from table 5, in the second embodiment, t=18±0.05mm, b=3.5 mm, the width T2 of the caulking zone 105 is set within the range of 17.971 to 17.980 before the pole assembly 3 is caulked, and after the pole assembly 3 is caulked, the width T2 of the caulking zone 105 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 3 is set within the range of ±0.01mm, that is, the width consistency of the cover plate is good.
As can be seen from table 6, in the third embodiment, t=18±0.05mm, b=5 mm, the width T2 of the caulking area 105 is set within the range of 17.980 to 17.986 before the pole assembly 3 is caulked, and after the pole assembly 3 is caulked, the width T2 of the caulking area 105 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 3 is set within the range of ±0.01mm, that is, the width consistency of the cover plate is good.
As can be seen from tables 4 to 6, while in comparative examples one to three, the width T2 of the caulking zone 105 tended to coincide with the respective widths T3, T4 and T5 of the flat plate zone 102 before caulking of the pole assembly 3, however, the width T2 of the caulking zone 105 increased after caulking of the pole assembly 3, resulting in a difference in measured values of the respective widths of the cap plate after caulking of the pole assembly 3 exceeding ±0.01mm, that is, a poor width consistency of the cap plate was demonstrated.
It should be noted that referring to fig. 2, in tables 4 to 6, T3, 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 an explosion-proof valve 2, and the explosion-proof valve 2 is disposed in correspondence with the mounting hole 101 and welded with the cap plate.
In one embodiment, as shown in fig. 6, the battery further includes a post assembly 3, and the post assembly 3 is riveted corresponding to the rivet hole 104.
In one embodiment, the battery further comprises a pole group disposed within the housing.
According to still another aspect of the embodiments of the present invention, there is also provided a battery pack including the above-described 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.

Claims (10)

1. A battery, comprising:
the device comprises a main body, wherein a mounting hole is formed in the side surface of the main body, the side surface of the main body comprises a flat plate area and a welding area, and the mounting hole is arranged corresponding to the welding area; along the width direction of the side surface of the main body, the distance between the hole edge of the mounting hole and the edge of the side surface of the main body is a, the width of the flat plate area is T, the width of the welding area is T1, and the requirements are thatWherein x is more than or equal to 8 and less than or equal to 12, and x is a real number.
2. The battery of claim 1, wherein a distance a between a hole edge of the mounting hole and an edge of a side face of the main body is > 1.5mm.
3. The battery according to claim 1 or 2, wherein a caulking hole is opened on a side surface of the main body, the side surface of the main body further comprises a caulking region, and the caulking hole is provided corresponding to the caulking region.
4. The battery according to claim 3, wherein a distance between a hole edge of the caulking hole and an edge of the side face of the main body in a width direction of the side face of the main body is b, and a width of the caulking region is T2, satisfyingWherein y is more than or equal to 10 and less than or equal to 14, and y is a real number.
5. The battery of claim 4, wherein a distance b between a hole edge of the rivet hole and an edge of a side face of the main body is 2mm to 10mm.
6. A battery according to claim 3, wherein the main body includes a cover plate or a case, and the mounting hole is provided corresponding to the cover plate or the case.
7. The battery of claim 6, wherein the edges of the cover plate are stepped.
8. The cell of claim 1 or 2, wherein the width t= (13+b±z) mm of the flat region, wherein B is 0 or more, B is an increment of 13mm of the minimum process of the flat region width, B is in mm, 0.03.ltoreq.z is 0.08 or less, z is a tolerance of the flat region width, and z is in mm.
9. The battery of claim 6, further comprising a post assembly disposed in rivet connection with the rivet hole; and/or the number of the groups of groups,
the battery also comprises an explosion-proof valve, wherein the explosion-proof valve is arranged corresponding to the mounting hole and is welded with the main body; and/or the number of the groups of groups,
the battery also includes a pole set disposed within the housing.
10. A battery pack comprising the battery according to any one of claims 1 to 9.
CN202410154828.6A 2024-02-04 2024-02-04 Battery and battery pack Active CN117691267B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410154828.6A CN117691267B (en) 2024-02-04 2024-02-04 Battery and battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410154828.6A CN117691267B (en) 2024-02-04 2024-02-04 Battery and battery pack

Publications (2)

Publication Number Publication Date
CN117691267A true CN117691267A (en) 2024-03-12
CN117691267B CN117691267B (en) 2024-04-12

Family

ID=90137515

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410154828.6A Active CN117691267B (en) 2024-02-04 2024-02-04 Battery and battery pack

Country Status (1)

Country Link
CN (1) CN117691267B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN217562770U (en) * 2022-07-20 2022-10-11 宁德时代新能源科技股份有限公司 Battery cell, battery and power consumption device
CN115425372A (en) * 2022-11-04 2022-12-02 江苏时代新能源科技有限公司 Electrode pole piece, electrode component, battery monomer, battery and consumer
CN218472229U (en) * 2022-10-14 2023-02-10 湖北亿纬动力有限公司 Pole, cover plate assembly and battery
WO2023143083A1 (en) * 2022-01-27 2023-08-03 比亚迪股份有限公司 Battery cover plate assembly, battery housing, and battery
CN116802921A (en) * 2022-09-29 2023-09-22 宁德新能源科技有限公司 Electrochemical device and electric equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023143083A1 (en) * 2022-01-27 2023-08-03 比亚迪股份有限公司 Battery cover plate assembly, battery housing, and battery
CN217562770U (en) * 2022-07-20 2022-10-11 宁德时代新能源科技股份有限公司 Battery cell, battery and power consumption device
CN116802921A (en) * 2022-09-29 2023-09-22 宁德新能源科技有限公司 Electrochemical device and electric equipment
CN218472229U (en) * 2022-10-14 2023-02-10 湖北亿纬动力有限公司 Pole, cover plate assembly and battery
CN115425372A (en) * 2022-11-04 2022-12-02 江苏时代新能源科技有限公司 Electrode pole piece, electrode component, battery monomer, battery and consumer

Also Published As

Publication number Publication date
CN117691267B (en) 2024-04-12

Similar Documents

Publication Publication Date Title
US8318336B2 (en) Rechargeable battery
CN108615830B (en) Top cover structure of power battery and power battery
KR100599754B1 (en) Secondary battery and cap assembly of secondary battery
CN115000641B (en) End cover assembly, battery monomer, battery and power consumption device
ATE510309T1 (en) BIPOLAR BATTERY AND BIPOLAR ASSEMBLY
CN217655975U (en) Battery cell, battery module and vehicle
CN115051084A (en) Cylindrical battery and battery module
KR20180081670A (en) Battery module and vehicle including the same
US20220102824A1 (en) Top cap assembly, secondary battery, battery module and device
CN216958252U (en) Battery cover plate assembly and battery
CN211980711U (en) Battery module and battery pack
CN117691267B (en) Battery and battery pack
JP2024059062A (en) Method for stamping and integral molding of top cover sheet, battery top cover structure and manufacturing method thereof
CN211629141U (en) Battery cover plate structure
CN210984769U (en) Power battery and car
JPS61195563A (en) Layer-built dry cell
EP3920268A1 (en) Secondary cell
CN117977127A (en) Battery and battery pack
CN114374030B (en) Battery, battery pack and preparation method of battery
CN114628864B (en) Battery, battery pack and vehicle
CN110828720A (en) Battery cover plate
CN217158390U (en) Battery, battery pack and vehicle
CN219937299U (en) Battery case and battery
CN219843056U (en) Battery cover plate and battery
KR20160089178A (en) Improved electric energy storage device for inner terminal installation structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant