CN106953035B - Battery cover plate assembly and battery comprising same - Google Patents
Battery cover plate assembly and battery comprising same Download PDFInfo
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- CN106953035B CN106953035B CN201710203692.3A CN201710203692A CN106953035B CN 106953035 B CN106953035 B CN 106953035B CN 201710203692 A CN201710203692 A CN 201710203692A CN 106953035 B CN106953035 B CN 106953035B
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- 238000000034 method Methods 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000007306 turnover Effects 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 3
- 210000005056 cell body Anatomy 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Classifications
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- 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 of a single cell or a single battery
- H01M50/147—Lids or covers
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- 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 of a single cell or a single battery
- H01M50/172—Arrangements of electric connectors penetrating the casing
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- 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
Abstract
The embodiment of the invention provides a battery cover plate assembly and a battery comprising the same, and solves the problems of complex structure and high process cost of the conventional battery cover plate assembly. This battery cover plate subassembly includes: a cover plate made of a conductive material; the positive electrode assembly is arranged on the cover plate and is electrically connected with the cover plate; and a negative electrode assembly disposed on and insulated from the cover plate; wherein the positive electrode assembly includes: the positive outer pole plate is arranged on the first surface of the cover plate in the vertical direction and is electrically connected with the cover plate; and the positive inner pole plate is arranged on a second surface, opposite to the first surface, of the cover plate and is electrically connected with the cover plate.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery cover plate assembly and a battery comprising the same.
Background
With the increasing importance of the current society on the concept of green environmental protection, electric energy has been gradually applied to aspects of people's life, for example, electric vehicles, electric trains, electric bicycles, and the like have all realized adopting batteries as power sources.
Fig. 1 is a schematic structural diagram of a battery provided in the prior art. As shown in fig. 1, the battery includes: a battery cover plate assembly 100', a battery cell body 200 and a casing 300. The cell body 200 is disposed in the casing 300, and the cell body 200 generates electric energy by an internal chemical reaction, and includes a positive electrode tab 41 and a negative electrode tab 42 for forming a circuit loop. The battery cover plate assembly 100' is hermetically disposed on the opening of the case 300. The conventional battery cover assembly 100' includes: the positive electrode component 1', the negative electrode component 2' and the cover plate 3', wherein the positive electrode component 1' and the negative electrode component 2 'are respectively arranged on the cover plate 3'. The positive electrode tab 41 of the battery cell body 200 is electrically connected with the external power utilization device 400 through the positive electrode assembly 1'; the negative electrode tab 42 of the battery cell body 200 is electrically connected to the external power consumption device 400 through the negative electrode assembly 2'.
Fig. 2 is a schematic view showing a positive electrode assembly portion of a conventional battery cover assembly. As shown in fig. 2, the positive electrode assembly 1 'of the conventional battery cover plate assembly 100' includes a positive electrode post 12', a positive electrode sealing ring 13', a positive electrode conductive plate 14', and a positive electrode outer plate 11'. The positive electrode post 12' includes a positive electrode column portion 121' and a positive electrode step portion 122', the positive electrode column portion 121' is disposed on the positive electrode step portion 122', and the positive electrode column portion 121' penetrates through the positive electrode through hole 31' of the cover plate 3' and is fixedly connected with the positive electrode outer plate 11'. The positive conductive plate 14' is disposed between the positive outer electrode plate 11' and the cover plate 3' for electrically connecting the positive outer electrode plate 11' and the cover plate 3'. The positive seal ring 13 'is disposed in a gap between the positive through hole 31' and the positive electrode post 12 'to seal the positive through hole 31'.
However, the above-described conventional battery cover assembly 100' has the following problems. The use of the positive electrode post 12 'to achieve the electrical conduction between the inside of the case 300 and the positive electrode outer plate 11' necessitates the provision of the positive electrode through hole 31 'in the cover plate 3', which results in a complicated assembly and an increase in process cost. Meanwhile, in order to prevent the gas inside the battery from being emitted to the outside of the battery, the positive sealing ring 13 'must be disposed at the positive through hole 31'. However, any one of the seal assemblies cannot achieve complete sealing, and the arrangement of such a seal assembly also results in complexity of the assembly and an increase in process cost. In addition, the positive outer plate 11' and the cover plate 3' are electrically connected in a contact conduction manner through the positive conductive plate 14', which results in an increase in contact internal resistance between the positive outer plate 11' and the cover plate 3', and thus in a loss of electrical energy.
Disclosure of Invention
In view of this, embodiments of the present invention provide a battery cover plate assembly and a battery, which solve the problems of complex structure and high process cost of the existing battery cover plate assembly.
An embodiment of the present invention provides a battery cover plate assembly including: a cover plate made of a conductive material;
the positive electrode assembly is arranged on the cover plate and is electrically connected with the cover plate; and
a negative electrode assembly disposed on and insulated from the cover plate,
characterized in that the positive electrode assembly comprises:
the positive outer pole plate is arranged on the first surface of the cover plate in the vertical direction and is electrically connected with the cover plate; and
and the positive inner pole plate is arranged on a second surface, opposite to the first surface, of the cover plate and is electrically connected with the cover plate.
The positive outer polar plate is welded on the first surface; and/or
The positive inner polar plate is welded on the second surface.
Wherein the cap plate further comprises: the first protruding structure is arranged on the first surface, a step structure is arranged at the bottom end of the positive outer pole plate, and the step structure of the positive outer pole plate is welded with the first protruding structure of the cover plate.
The first protruding structure comprises two protruding ribs, and two sides of the step structure of the positive outer pole plate are respectively welded to two opposite side faces of the two protruding ribs.
Wherein the cover plate further comprises: the second protruding structure is arranged on the second surface, a welding through hole is formed in the positive inner pole plate, and the second protruding structure of the cover plate is welded in the welding through hole of the positive inner pole plate.
Wherein the first protruding structure or the second protruding structure is formed by a stamping process.
Wherein, the battery cover plate assembly further includes: and the negative electrode conduction device is used for conducting the negative electrode assembly and the cover plate under a preset condition.
The anode inner polar plate comprises a fusing through hole and two fusing strips respectively positioned on two sides of the fusing through hole.
Wherein the battery cover plate assembly further comprises a fusing protection clamp configured to limit a change in position and/or shape of the positive inner electrode plate.
The anode inner polar plate comprises a fusing through hole and two fusing strips respectively positioned on two sides of the fusing through hole;
the fusing protection clamp is made of an insulating material and comprises an upper end plate, a lower end plate and a connecting column, wherein the lower end plate is connected with the upper end plate through the connecting column;
the connecting column penetrates through the fusing through hole, the upper end plate is arranged between the positive inner pole plate and the cover plate, and the lower end plate supports one surface of the positive inner pole plate, which is far away from the second surface in the vertical direction.
Wherein, the negative pole switches on the device and is the upset piece, the apron includes negative pole through-hole and negative pole conduction groove, the negative pole subassembly includes: the negative pole outer polar plate, the negative pole post and the sealing component are arranged on the outer side of the anode;
the negative pole post penetrates through the negative through hole to be electrically connected with the negative outer pole plate, and the sealing assembly is configured to form insulation between the negative outer pole plate and the cover plate and insulation between the negative pole post and the cover plate;
the turnover sheet is electrically connected with the cover plate in a non-turnover state and is suspended in the negative electrode conduction groove of the cover plate, and when the pressure in the battery is abnormal, the turnover sheet is turned over in shape and is conducted with the negative electrode outer polar plate.
The negative pole post comprises a negative pole columnar part and a negative pole stepped part, the negative pole columnar part is arranged on the negative pole stepped part, and the negative pole columnar part penetrates through the negative pole through hole to be electrically connected with the negative pole outer pole plate;
wherein the battery cover plate assembly further comprises: and the insulating protection pad is arranged below the second surface of the cover plate and used for forming insulation between the cover plate and the positive inner polar plate and insulation between the cover plate and the negative step part of the negative pole post.
An embodiment of the present invention provides a battery, including: a battery cover plate assembly as claimed in any preceding claim.
According to the battery cover plate assembly and the battery provided by the embodiment of the invention, the positive outer polar plate and the positive inner polar plate are respectively and directly welded on the first surface and the second surface of the cover plate, so that the positive outer polar plate and the positive inner polar plate are directly and electrically connected through the cover plate, and a positive through hole, a positive sealing ring, a positive conductive plate and a positive polar pole in the existing battery cover plate assembly are eliminated. The positive assembly of the cover plate is completely sealed, and meanwhile, the adopted parts are fewer, so that the structure is simpler, and the process cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of a battery provided in the prior art.
Fig. 2 is a schematic view illustrating a positive electrode assembly portion of a battery cover plate assembly provided in the prior art.
Fig. 3 is a schematic structural diagram of a battery according to an embodiment of the present invention.
Fig. 4 is a front view of a positive electrode assembly portion of a battery cover assembly according to an embodiment of the present invention.
Fig. 5 is a bottom view of a positive electrode assembly portion of a battery cover plate assembly according to an embodiment of the present invention.
Fig. 6a to 6b are schematic diagrams illustrating a working principle of a battery cover plate assembly according to an embodiment of the present invention.
Detailed Description
The technical solution in 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. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the invention provides a battery cover assembly 100 suitable for a battery as shown in fig. 3. The battery cover plate assembly 100 includes: a positive electrode assembly 1, a negative electrode assembly 2, and a cover plate 3 made of a conductive material. The positive electrode assembly 1 is arranged on the cover plate 3 and is electrically connected with the cover plate 3, and the negative electrode assembly 2 is arranged on the cover plate 3 and is insulated from the cover plate 3. The positive electrode tab 41 of the battery cell body 200 is electrically connected to the external power consumption device 400 through the positive electrode assembly 1. The negative electrode tab 42 of the cell body 200 is electrically connected to the external power consumption device 400 through the negative electrode assembly 2.
However, the battery cover assembly 100 is different from the conventional battery cover assembly 100'. Specifically, as shown in fig. 4, the positive electrode assembly 1 of the battery cover plate assembly 100 includes: a positive outer electrode plate 11 and a positive inner electrode plate 12. The positive outer electrode plate 11 is disposed on a first surface 31 of the cover plate 3 in the vertical direction, and is electrically connected to the external electric device 400, where the first surface 31 is a surface of the cover plate 3 facing the external electric device 400. The positive inner electrode plate 12 is disposed on a second surface 32 of the cover plate 3 opposite to the first surface 31, and is electrically connected to the positive tab 41 (for example, refer to fig. 6 a), where the second surface 32 is a surface of the cover plate 3 facing the battery inner cell body 200. The positive outer polar plate 11 and the positive inner polar plate 12 are electrically connected through the cover plate 3. When the battery cover plate assembly 100 is applied to a battery, the circuit conducting direction in the circuit loop formed under the normal working state of the battery can be: the structure comprises a positive electrode lug 41, a positive electrode inner electrode plate 12, a cover plate 3, a positive electrode outer electrode plate 11, an external electricity utilization device 400, a negative electrode assembly 2 and a negative electrode lug 42.
It can be seen that, compared to the conventional battery cover plate assembly 100 'shown in fig. 2, the battery cover plate assembly 100 according to the embodiment of the present invention directly welds the positive outer electrode plate 11 and the positive inner electrode plate 12 to the first surface 31 and the second surface 32 of the cover plate 3, respectively (for example, laser welding may be adopted), so that the positive outer electrode plate 11 and the positive inner electrode plate 12 are directly electrically connected through the cover plate 3, and the positive through hole 31', the positive sealing ring 13', the positive electrode terminal 14', and the positive conductive plate 12 'in the conventional battery cover plate assembly 100' are eliminated. The positive electrode component 1 of the cover plate 3 is completely sealed, and meanwhile, the adopted parts are fewer, the structure is simpler, and the process cost is lower.
In an embodiment of the present invention, the positive outer plate 11 may be welded to the first surface 31, and the positive inner plate 12 may also be welded to the second surface 32. Therefore, the positive electrode assembly 1 of the battery cover plate 3 can be partially and completely sealed, the contact internal resistance between the positive electrode outer polar plate 11 and the cover plate 3 is eliminated, and the electric energy loss is reduced.
In an embodiment of the present invention, in order to avoid welding the cover plate 3 through when welding the positive outer plate 11 on the first surface 31 of the cover plate 3, the cover plate 3 of the battery cover plate assembly may further include a first protrusion structure 311 (height may be 1 mm) disposed on the first surface 31, a step structure 111 (thickness may be 1 mm) is disposed at a bottom end of the positive outer plate 11, and the step structure 111 of the positive outer plate 11 is welded with the first protrusion structure 311 of the cover plate 3. Thus, when the positive outer electrode plate 11 is welded on the cover plate 3, the welding penetration can be effectively prevented from being welded through the cover plate 3 by controlling the welding penetration to be smaller than the projection height of the first projection structure 311. In an embodiment of the present invention, as shown in fig. 4, the first protruding structure 311 may specifically include two protruding ribs, two sides of the step structure 111 of the positive outer plate 11 are respectively welded to two opposite sides of the two protruding ribs, and the position of the welding line may be shown as 500 in fig. 4.
In an embodiment of the present invention, in order to avoid welding the cover plate 3 through when welding the positive electrode inner plate 12 to the second surface 32 of the cover plate 3, as shown in fig. 4, the cover plate 3 may further include a second protrusion structure 321 (height may be 1 mm) disposed on the second surface 32, the positive electrode inner plate 12 is provided with a welding through hole 121, and the second protrusion structure 321 of the cover plate 3 is welded in the welding through hole 121 of the positive electrode inner plate 12. For example, the second protrusion 321 may be a cylindrical convex hull capable of matching with the welding through hole 121, and after the convex hull is inserted into the welding through hole 121, the edge of the convex hull is welded to the side of the welding through hole 121, and the position of the welding line may be as shown in 500 in fig. 4. In a further embodiment, in order to facilitate the soldering process within the solder through-hole 121, a solder step may also be provided at the port of the solder through-hole 121. Similarly, the penetration of the welding is controlled to be smaller than the height of the second protrusion 321 during the welding process, so as to effectively prevent the welding from penetrating the cover plate 3.
In an embodiment of the invention, the first bump structure 311 and/or the second bump structure 321 may be directly formed by a stamping process. Thus, the first bump structures 311 and/or the second bump structures 321 can be formed in batches quickly by stamping processes after the plate material of the cover plate 3 is processed.
It should be understood that, although the specific shapes of the first bump structure 311 and the second bump structure 321 are defined in the above description, in other embodiments of the present invention, the first bump structure 311 and the second bump structure 321 may be implemented by other shapes, as long as the purpose of preventing the cover plate 3 from being welded through is achieved, and the present invention is not limited thereto.
In an embodiment of the present invention, in consideration that the output of the electric energy needs to be stopped immediately to avoid a danger when the battery is in an abnormal operating state (for example, the gas pressure inside the casing 300 is abnormal due to an abnormal chemical reaction inside the battery cell body 200), a negative conduction device (not shown in fig. 4) may be further disposed in the battery cover plate assembly 100. The negative electrode conducting device can conduct the negative electrode assembly 2 and the cover plate 3 under a preset condition (such as an abnormal working state of the battery). In this way, in the abnormal operation state of the battery, the short circuit between the negative electrode assembly 2 and the positive electrode assembly 1 can be realized, and the conducting direction of the circuit in the formed circuit loop is changed to: the protection circuit is characterized in that the protection circuit comprises a positive pole lug 41, a positive pole inner pole plate 12, a cover plate 3, a positive pole outer pole plate 11, a negative pole assembly 2 and a negative pole lug 42, and a circuit loop in a short circuit state is disconnected from a preset position through a certain protection design, so that the protection purpose can be achieved.
In an embodiment of the present invention, the protection scheme can be implemented by fusing a portion of the positive inner plate 12. Specifically, as shown in fig. 5, the positive inner plate 12 may include a fuse via 122 and two fuse bars 123 respectively located at both sides of the fuse via 122. Because the width of the positive inner plate 12 is constant, the width of the two fusing bars 123 located at the two sides of the fusing through hole 122 is narrower than that of the other parts of the positive inner plate 12, and therefore the square of the conduction of the two fusing bars 123 is smaller, when the circuit loop is in a short circuit state, the two fusing bars 123 will fuse first to break the circuit loop, thereby playing a role of protection.
In an embodiment of the present invention, it is considered that the shape and position of the fused positive inner electrode plate 12 may be changed, which may cause secondary conduction between the positive inner electrode plate 12 and the cover plate 3 or affect the performance of other components inside the battery. As shown in fig. 4, the battery cover plate assembly 100 may further include a fusing protection jig 8 configured to limit a change in position and/or shape of the positive electrode inner plate 12. For example, when the positive inner plate 12 includes the fuse via 122 and two fuse bars 123 respectively located at two sides of the fuse via 122, in order to avoid the shape and position of the positive inner plate 12 from changing after the two fuse bars 123 are fused, the fuse protection clamp 8 may be designed to be in an i shape. Specifically, the fuse protection jig 8 is made of an insulating material and includes an upper end plate 81, a lower end plate 82, and a connection post 83, the lower end plate 82 is connected to the upper end plate 81 through the connection post 83, and the connection post 83 penetrates through the fuse through hole 122. The upper end plate 81 is arranged between the positive inner pole plate 12 and the cover plate 3 and is used for ensuring the insulation between the positive inner pole plate 12 and the cover plate 3 after the two fusing strips 123 are fused; the lower end plate 82 holds the side of the positive inner electrode plate 12 facing the cell body 200, so as to prevent the positive inner electrode plate 12 from falling into the battery after the two fusing bars 123 are fused.
Fig. 6a and 6b are schematic diagrams illustrating an operation principle of a battery cover plate assembly according to an embodiment of the present invention. As shown in fig. 6a and 6b, the positive electrode assembly 1 of the battery cover plate assembly 100 is the same as that shown in fig. 4, and will not be described again. The negative electrode assembly 2 includes: a negative outer plate 21, a negative electrode post 22, and a seal assembly 23. Wherein the negative electrode post 22 passes through the negative through hole 313 to be electrically connected with the negative outer electrode plate 21, and the sealing assembly 23 is configured to form insulation between the negative outer electrode plate 21 and the negative electrode post 22 and the cover plate 3, respectively.
In an embodiment of the present invention, as shown in fig. 6a and 6b, the negative electrode post 22 may include a negative electrode pillar portion 221 and a negative electrode step portion 222, the negative electrode pillar portion 221 is disposed on the negative electrode step portion 222, and the negative electrode pillar portion 221 is electrically connected to the negative electrode outer plate 21 through the negative electrode through hole 313. At this time, in order to achieve the insulation between the cover plate 3 and the negative step portion 222 of the negative electrode post 22, the cover plate assembly may further include an insulating protection pad 33 disposed below the second surface 32 of the cover plate 3, thereby forming the insulation between the cover plate 3 and the positive inner electrode plate 12 and the insulation between the cover plate 3 and the negative step portion 222 of the negative electrode post 22.
In one embodiment of the present invention, as shown in fig. 6a and 6b, in order to facilitate the formation of the electrical connection assembly inside the casing 300, the positive inner electrode plate 12 of the positive assembly 1 may be electrically connected to the positive tab 41 by a positive tab 6, and the negative assembly 2 may be electrically connected to the negative tab 42 by a negative tab 7. Thus, as shown by the arrows in fig. 6a, the circuit conducting direction in the circuit loop of the battery under the normal operation state is: the external electric device comprises a positive pole lug 41, a positive pole lead piece 6, a positive pole inner pole plate 12, a cover plate 3, a positive pole outer pole plate 11, an external electric device 400, a negative pole outer pole plate 21, a negative pole post 22, a negative pole lead piece 7 and a negative pole lug 42. However, it should be understood that the positive electrode assembly 1 and the negative electrode assembly 2 may be electrically connected to the positive electrode tab 41 and the negative electrode tab 42 in other manners, and the present invention is not limited thereto.
In an embodiment of the present invention, as shown in fig. 6a and 6b, the negative conduction means in the battery cover plate assembly 100 is an inversion sheet 9, and the cover plate 3 includes a negative through hole 313 and a negative conduction groove 314.
As shown in fig. 6a, in the normal operation state of the battery, the turning piece 9 is in the non-turned state, and at this time, the turning piece 9 is electrically connected with only the cover plate 3 and is suspended in the negative electrode conduction groove 314 of the cover plate 3. When the pressure in the battery is abnormal, the turnover sheet 9 turns over in shape and is conducted with the negative outer pole plate 21, so that the cover plate 3 is conducted with the negative outer pole plate 21 to form a short circuit of a circuit loop. As shown by the arrows in fig. 6b, the circuit conducting direction in the circuit loop in the short-circuit state becomes: the fusing bar 123 on the anode inner plate 12 is firstly fused to break the whole circuit loop so as to achieve the fusing protection effect.
It should be understood that, although the negative conducting device is defined as the turning piece 9 in the above description, in other embodiments of the present invention, the negative conducting device may also take other forms in order to meet different requirements of a scene, as long as the conduction between the negative electrode assembly 2 and the cover plate 3 can be completed under a preset condition to realize a short circuit, and the present invention does not specifically limit the specific form of the negative conducting device.
It should also be understood that, although the specific assembly form of the negative electrode assembly 2 is defined in the above description, in other embodiments of the present invention, the negative electrode assembly 2 may be implemented in other assembly forms as long as the negative electrode assembly can be used to implement the electrical connection between the negative electrode tab 42 of the cell body 200 and the external power consumption device 400, and the specific assembly form of the negative electrode assembly 2 is not limited by the present invention.
An embodiment of the present invention further provides a battery, which includes the battery cover plate assembly 100 according to any of the previous embodiments.
In the battery provided by the embodiment of the invention, the battery cover plate assembly 100 is adopted to respectively and directly weld the positive outer electrode plate 11 and the positive inner electrode plate 12 on the first surface 31 and the second surface 32 of the cover plate 3, so that the positive outer electrode plate 11 and the positive inner electrode plate 12 are directly electrically connected through the cover plate 3, and the positive through hole 31', the positive sealing ring 13', the positive conductive plate 14' and the positive pole post 12' in the existing battery cover plate assembly 100' are eliminated. Thus, the positive electrode component 1 of the battery cover plate 3 can be completely sealed; meanwhile, the adopted parts are fewer, so that the structure is simpler, and the process cost is lower.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (13)
1. A battery cover plate assembly comprising:
a cover plate made of a conductive material;
the positive electrode assembly is arranged on the cover plate and is electrically connected with the cover plate; and
a negative electrode assembly disposed on and insulated from the cover plate,
characterized in that, the positive pole subassembly includes:
the positive outer pole plate is arranged on the first surface of the cover plate in the vertical direction and is directly and electrically connected with the cover plate; and
the positive inner polar plate is arranged on a second surface, opposite to the first surface, of the cover plate and is directly and electrically connected with the cover plate, and the positive inner polar plate is electrically connected with a positive polar lug.
2. The battery cover plate assembly of claim 1, wherein the positive outer plate is welded to the first surface; and/or
The positive inner polar plate is welded on the second surface.
3. The battery cover plate assembly of claim 2, wherein the cover plate further comprises: the setting is in the first protruding structure of first surface, anodal outer polar plate bottom is equipped with the stair structure, anodal outer polar plate the stair structure with the apron first protruding structure welds mutually.
4. The battery cover plate assembly of claim 3, wherein the first protrusion structure comprises two protrusion ribs, and two sides of the step structure of the positive outer plate are welded to two opposite sides of the two protrusion ribs, respectively.
5. The battery cover plate assembly of claim 2, wherein the cover plate further comprises: the second protruding structure is arranged on the second surface, a welding through hole is formed in the positive inner pole plate, and the second protruding structure of the cover plate is welded in the welding through hole of the positive inner pole plate.
6. The battery cover plate assembly of claim 3 or 5, wherein the first raised structure or the second raised structure is formed by a stamping process.
7. The battery cover plate assembly of claim 1, further comprising: and the negative electrode conduction device is used for conducting the negative electrode assembly and the cover plate under a preset condition.
8. The battery cover plate assembly of claim 7, wherein the positive inner plate comprises a fuse through hole and two fuse bars respectively located at two sides of the fuse through hole.
9. The battery cover plate assembly of claim 7, further comprising a fuse protection clamp configured to limit a change in position and/or shape of the positive inner plate.
10. The battery cover plate assembly of claim 9, wherein the positive inner plate comprises a fuse through hole and two fuse bars respectively located at two sides of the fuse through hole;
the fusing protection clamp is made of an insulating material and comprises an upper end plate, a lower end plate and a connecting column, wherein the lower end plate is connected with the upper end plate through the connecting column;
the connecting column penetrates through the fusing through hole, the upper end plate is arranged between the positive inner polar plate and the cover plate, and the lower end plate supports one surface, far away from the second surface, of the positive inner polar plate in the vertical direction.
11. The battery cover plate assembly of claim 7, wherein the negative conduction device is an overturn piece, the cover plate comprises a negative through hole and a negative conduction groove, and the negative assembly comprises: the negative pole outer polar plate, the negative pole post and the sealing component are arranged on the outer side of the anode;
the negative pole post penetrates through the negative through hole to be electrically connected with the negative outer pole plate, and the sealing assembly is configured to form insulation between the negative outer pole plate and the cover plate and insulation between the negative pole post and the cover plate;
the turnover sheet is electrically connected with the cover plate in a non-turnover state and is suspended in the negative electrode conduction groove of the cover plate, and when the pressure in the battery is abnormal, the turnover sheet is turned over in shape and is conducted with the negative electrode outer polar plate.
12. The battery cover plate assembly of claim 11, wherein the negative electrode post comprises a negative electrode pillar portion and a negative electrode step portion, the negative electrode pillar portion is disposed on the negative electrode step portion, and the negative electrode pillar portion passes through the negative electrode through hole to be electrically connected with the negative electrode outer plate;
wherein, the battery cover plate assembly further includes: and the insulating protection pad is arranged below the second surface of the cover plate and used for forming insulation between the cover plate and the positive inner polar plate and insulation between the cover plate and the negative step part of the negative pole post.
13. A battery comprising a battery cover plate assembly according to any one of claims 1 to 5 and 7 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203692.3A CN106953035B (en) | 2017-03-30 | 2017-03-30 | Battery cover plate assembly and battery comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710203692.3A CN106953035B (en) | 2017-03-30 | 2017-03-30 | Battery cover plate assembly and battery comprising same |
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| CN106953035A CN106953035A (en) | 2017-07-14 |
| CN106953035B true CN106953035B (en) | 2023-04-07 |
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|---|---|---|---|---|
| CN107946497A (en) * | 2017-12-20 | 2018-04-20 | 天津锦泰勤业精密电子有限公司 | Battery cover board electrode assemblie, battery cover board assembly and battery |
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