CN111952514A - Battery with a battery cell - Google Patents
Battery with a battery cell Download PDFInfo
- Publication number
- CN111952514A CN111952514A CN202010855073.4A CN202010855073A CN111952514A CN 111952514 A CN111952514 A CN 111952514A CN 202010855073 A CN202010855073 A CN 202010855073A CN 111952514 A CN111952514 A CN 111952514A
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- Prior art keywords
- shell
- pole
- pole piece
- battery
- end surface
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0422—Cells or battery with cylindrical casing
- H01M10/0427—Button cells
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a battery, wherein the middle part of a base shell is provided with an outward-bent shoulder A and a shoulder B, so that when the battery is heated, gas in the battery expands to two ends of a cavity, the gas can release pressure, and the phenomenon of expansion in the direction of two electrodes can be avoided; meanwhile, the heat dissipation area of the shell can be increased, and the heat dissipation capacity is improved; the sealing and edge folding process can improve the sealing performance of the battery, can increase the strength of the first polar shell and the second polar shell, and is beneficial to improving the overall structural strength of the battery; the first pole piece and the second pole piece are wound into a whole, the upper end face of the first pole piece is electrically connected with the first pole shell, and the lower end face of the second pole piece is electrically connected with the second pole shell; by adopting the connection mode, welding is not needed, the process can be simplified, the cost is reduced, and the realization of automatic production is facilitated; meanwhile, the design of end face contact is adopted, so that rapid and stable charging and discharging can be realized, and the cycle life of the battery is prolonged.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of batteries, in particular to a battery.
[ background of the invention ]
The existing battery generally connects a pole piece and a pole shell through a pole lug, at present, the pole lug and the pole shell are generally connected through a welding mode, but the welding mode is complex in process, a cold welding phenomenon easily occurs, and large current is difficult to pass through; in addition, the battery generates heat to cause expansion in the using process, and the existing battery is generally designed with a structure capable of expanding and contracting along the directions of two electrodes, but the battery is not suitable for being used in some using scenes sensitive to the expansion of the battery. In addition, batteries are more and more common in daily life, such as internet of things batteries, hearing aid batteries, bluetooth headset batteries and the like, and due to the small size, the battery assembly is more and more difficult, the qualification rate is low, the automation is difficult to realize, and the cost is high.
The invention is researched and proposed aiming at the defects of the prior art.
[ summary of the invention ]
In order to solve the above technical problem, the invention provides a battery, wherein the micro battery comprises a housing and a battery core, and the housing comprises: the battery comprises a first pole shell made of a conductive material, a second pole shell made of a conductive material and a base shell made of a conductive material, wherein the first pole shell is hermetically connected at one end of the base shell, the second pole shell is hermetically connected at the other end of the base shell, an insulating layer made of an insulating material is arranged between the base shell and the first pole shell as well as between the base shell and the second pole shell, a cavity for accommodating a battery cell is arranged between the first pole shell and the base shell, the battery cell comprises a first pole piece and a second pole piece which are wound mutually, the first pole piece and the second pole piece are close to each other, an isolating film is arranged between the second pole piece of the first pole piece, the upper end face of the first pole piece protrudes out of the upper end face of the second pole piece, the lower end face of the second pole piece protrudes out of the lower end face of the first pole piece, and the upper end face of the first pole piece is electrically connected with the first pole shell, the lower end face of the second pole piece is electrically connected with the second pole piece shell; the middle part of the base shell is provided with a shoulder A and a shoulder B which are bent outwards, so that two ends of the cavity in the base shell are large, the middle of the cavity is small, the edge of the first polar shell is provided with a flanging A buckled with the shoulder A, and the edge of the second polar shell is provided with a flanging B buckled with the shoulder B.
According to the battery, the first pole shell is provided with the boss A which is bent outwards; and the second pole piece shell is provided with a boss B which is bent outwards.
According to the battery, the first pole shell is provided with the reinforcing part A for improving the sealing performance between the first pole shell and the upper end edge of the base shell, the reinforcing part A is U-shaped, and the upper end edge of the base shell is clamped in the reinforcing part A; the second pole shell is provided with a reinforcing part B for improving the sealing performance between the second pole shell and the lower end edge of the base shell, the reinforcing part B is U-shaped, and the lower end edge of the base shell is clamped in the reinforcing part B.
According to the battery, the conducting strip A made of the foam conducting material is arranged between the upper end face of the first pole piece and the first pole shell, and the conducting strip B made of the foam conducting material is arranged between the lower end face of the second pole piece and the second pole shell.
According to the battery, the conductive adhesive is arranged in the contact area of the upper end surface of the first pole piece and the first pole shell, and the conductive adhesive is arranged in the contact area of the lower end surface of the second pole piece and the second pole shell.
According to the battery, the upper end surface of the first pole piece is provided with the convex teeth A for improving the electric conductivity between the upper end surface of the first pole piece and the first pole shell, and the lower end surface of the second pole piece is provided with the convex teeth B for improving the electric conductivity between the lower end surface of the second pole piece and the second pole shell.
The invention relates to a battery, which comprises a shell and a battery core, wherein the shell comprises: the battery comprises a first pole piece, a second pole piece and a base shell, wherein the first pole piece is made of a conductive material, the second pole piece is made of a conductive material, the base shell is made of an insulating material, the first pole piece is hermetically connected to one end of the base shell, the second pole piece is hermetically connected to the other end of the base shell, a cavity for accommodating a battery cell is arranged between the first pole piece, the second pole piece and the base shell, the battery cell comprises a first pole piece and a second pole piece which are wound with each other, the first pole piece and the second pole piece are close to each other, an isolating film is arranged between the second pole piece of the first pole piece, the upper end face of the first pole piece protrudes out of the upper end face of the second pole piece, the lower end face of the second pole piece protrudes out of the lower end face of the first pole piece, the upper end face of the first pole piece is electrically connected with the first pole piece, and the lower end face of the second pole; the middle part of the base shell is provided with a shoulder A and a shoulder B which are bent outwards, so that two ends of the cavity in the base shell are large, the middle of the cavity is small, the edge of the first polar shell is provided with a flanging A buckled with the shoulder A, and the edge of the second polar shell is provided with a flanging B buckled with the shoulder B.
Compared with the prior art, the invention has the following advantages:
1. the battery of the invention adopts a three-section structure and has the advantage of simple assembly; the shoulder A and the shoulder B which are bent outwards are arranged in the middle of the base shell, so that two ends of a cavity in the base shell are large, the middle of the cavity is small, the first pole shell and the second pole shell are buckled at two ends of the base shell, and when the battery is heated, gas in the battery expands towards two ends of the cavity, so that the pressure relief effect can be realized, and the phenomenon of expansion towards the directions of two electrodes can be avoided; meanwhile, the heat dissipation area of the shell can be increased, and the heat dissipation capacity is improved; the sealing and flanging process can improve the sealing performance of the battery, can increase the strength of the first polar shell and the second polar shell, and is favorable for improving the strength of the overall structure of the battery.
2. The first pole piece and the second pole piece are wound into a whole, the upper end face of the first pole piece is electrically connected with the first pole shell, and the lower end face of the second pole piece is electrically connected with the second pole shell; by adopting the connection mode, welding is not needed, the process can be simplified, the cost is reduced, and the realization of automatic production is facilitated; meanwhile, the design of end face contact is adopted, so that rapid and stable charge and discharge can be realized, and the cycle life of the battery is prolonged; is particularly suitable for batteries with high discharge strength.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic view in full section of example 1 of the present invention;
FIG. 3 is an exploded view of example 1 of the present invention;
FIG. 4 is a schematic structural view of example 2 of the present invention;
FIG. 5 is a schematic view in full section of example 2 of the present invention;
FIG. 6 is an exploded view of example 2 of the present invention;
FIG. 7 is a schematic structural view of example 3 of the present invention;
FIG. 8 is a schematic view in full section of example 3 of the present invention;
FIG. 9 is an exploded view of example 3 of the present invention;
FIG. 10 is a schematic structural view of example 4 of the present invention;
FIG. 11 is a schematic view in full section of example 4 of the present invention;
fig. 12 is an exploded view of embodiment 4 of the present invention.
[ detailed description ] embodiments
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 12, the present invention has 4 specific embodiments.
Example 1:
as shown in fig. 1 to fig. 3, a battery of the present embodiment, the micro battery includes a casing 1 and a battery core 2, where the casing 1 includes: a first pole shell 11 made of conductive material, a second pole shell 12 made of conductive material and a base shell 13 made of conductive material, wherein the first pole shell 11 is hermetically connected at one end of the base shell 13, the second pole shell 12 is hermetically connected at the other end of the base shell 13, an insulating layer 14 made of insulating material is arranged between the base shell 13 and the first pole shell 11 and the second pole shell 12, a cavity 100 for accommodating the electric core 2 is arranged between the first pole shell 11, the second pole shell 12 and the base shell 13, the electric core 2 comprises a first pole piece 21 and a second pole piece 22 which are mutually wound, the first pole piece 21 and the second pole piece 22 are closely connected, a separation film 23 is arranged between the second pole piece 22 of the first pole piece 21, the upper end face of the first pole piece 21 protrudes out of the upper end face of the second pole piece 22, the lower end face of the second pole piece 22 protrudes out of the lower end face of the first pole piece 21, the upper end surface of the first pole piece 21 is electrically connected with the first pole shell 11, and the lower end surface of the second pole piece 22 is electrically connected with the second pole shell 12; the middle of the base shell 13 is provided with a shoulder a131 and a shoulder B132 which are bent outwards, the shoulder a131 and the shoulder B132 are formed by bending the base shell, so that two ends of the cavity 100 in the base shell 13 are large, the middle of the cavity is small, the edge of the first pole shell 11 is provided with a flange a111 which is buckled with the shoulder a131, and the edge of the second pole shell 12 is provided with a flange B121 which is buckled with the shoulder B132. The battery of the invention adopts a three-section structure and has the advantage of simple assembly; the shoulder A and the shoulder B which are bent outwards are arranged in the middle of the base shell, so that two ends of a cavity in the base shell are large, the middle of the cavity is small, the first pole shell and the second pole shell are buckled at two ends of the base shell, and when the battery is heated, gas in the battery expands towards two ends of the cavity, so that the pressure relief effect can be realized, and the phenomenon of expansion towards the two electrodes can be avoided; meanwhile, the heat dissipation area of the shell can be increased, and the heat dissipation capacity is improved; the sealing and flanging process can improve the sealing performance of the battery, can increase the strength of the first polar shell and the second polar shell, and is favorable for improving the strength of the overall structure of the battery. The first pole piece and the second pole piece are wound into a whole, the upper end face of the first pole piece is electrically connected with the first pole shell, and the lower end face of the second pole piece is electrically connected with the second pole shell; by adopting the connection mode, welding is not needed, the process can be simplified, the cost is reduced, and the realization of automatic production is facilitated; meanwhile, the design of end face contact is adopted, so that rapid and stable charge and discharge can be realized, and the cycle life of the battery is prolonged; is particularly suitable for batteries with high discharge strength.
In order to improve the contact area between the upper end surface of the first pole piece and the first pole shell and improve the conductivity between the upper end surface of the first pole piece and the first pole shell, a conducting strip a31 made of a foam conducting material is arranged between the upper end surface of the first pole piece 21 and the first pole shell 11, the conducting strip a can be connected to the inner side of the first pole shell in a spot welding or direct contact mode, and the foam conducting material can be a material with good conductivity such as foam copper, foam nickel and the like.
Similarly, in order to increase the contact area between the lower end surface of the second pole piece and the second pole piece shell and to increase the conductivity between the lower end surface of the second pole piece and the second pole piece shell, a conductive sheet B32 made of a foam conductive material is arranged between the lower end surface of the second pole piece 22 and the second pole piece shell 12, the conductive sheet B may be connected to the inner side of the second pole piece shell by spot welding or direct contact, and the foam conductive material may be a material with good conductivity, such as copper foam, nickel foam, or the like.
Between the upper end surface of the first pole piece 21 and the first pole shell 11, not only can the conductive sheet a be used to improve the conductive performance, but also a conductive adhesive can be disposed in the contact area between the upper end surface of the first pole piece 21 and the first pole shell 11, and a conductive adhesive is disposed in the contact area between the lower end surface of the second pole piece 22 and the second pole shell 12. The conductivity can be improved by conductive glue.
Methods for improving the conductive properties include: the upper end face of the first pole piece 21 is provided with a convex tooth A for improving the conductivity between the upper end face of the first pole piece 21 and the first pole shell 11; the lower end surface of the second pole piece 22 is provided with a convex tooth B for improving the electrical conductivity between the lower end surface of the second pole piece 22 and the second pole case 12.
Example 2:
as shown in fig. 4 to 6, the present embodiment is different from embodiment 1 in that: in this embodiment, the first pole shell 11 is provided with a boss a112 bent outwards; the second pole piece shell 12 is provided with a boss B122 bent outwards; with this design, automated assembly can be facilitated.
Example 3:
as shown in fig. 7 to 9, the present embodiment is different from embodiment 1 in that: the first pole shell 11 is provided with a reinforced part A113 for improving the sealing performance between the first pole shell 11 and the upper end edge of the base shell 13, the reinforced part A113 is U-shaped, and the upper end edge of the base shell 13 is clamped in the reinforced part A113; the second pole piece shell 12 is provided with a reinforced part B123 for improving the sealing performance between the second pole piece shell 12 and the lower end edge of the base shell 13, the reinforced part B123 is U-shaped, and the lower end edge of the base shell 13 is clamped in the reinforced part B123. By adopting the design, the sealing performance between the edges of the two ends of the first polar shell, the second polar shell and the base shell can be improved, the effectiveness and the sealing strength of the seal are improved, and the leakage proportion of the battery is reduced.
Example 4:
as shown in fig. 10 to 12, in the battery of the present embodiment, the micro battery includes a casing 1 and a battery core 2, where the casing 1 includes: a first pole piece 11 made of an electrically conductive material, a second pole piece 12 made of an electrically conductive material and a base piece 13 made of an insulating material, the first polar shell 11 is hermetically connected at one end of the base shell 13, the second polar shell 12 is hermetically connected at the other end of the base shell 13, a cavity 100 for accommodating the battery cell 2 is arranged between the first pole piece 11, the second pole piece 12 and the base shell 13, the battery core 2 comprises a first pole piece 21 and a second pole piece 22 which are wound with each other, the first pole piece 21 and the second pole piece 22 are arranged next to each other, and a separation film 23 is arranged between the second pole pieces 22 of the first pole piece 21, the upper end surface of the first pole piece 21 protrudes out of the upper end surface of the second pole piece 22, the lower end surface of the second pole piece 22 protrudes out of the lower end surface of the first pole piece 21, the upper end surface of the first pole piece 21 is electrically connected with the first pole shell 11, and the lower end surface of the second pole piece 22 is electrically connected with the second pole shell 12; the middle of the base shell 13 is provided with a shoulder a131 and a shoulder B132 which are bent outwards, so that two ends of the cavity 100 in the base shell 13 are large and the middle is small, the edge of the first pole shell 11 is provided with a flange a111 buckled with the shoulder a131, and the edge of the second pole shell 12 is provided with a flange B121 buckled with the shoulder B132. Compared with embodiment 1, the base shell 13 of the present embodiment is made of an insulating material, which can simplify the process.
The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (7)
1. A battery, characterized in that, said miniature battery comprises a casing (1) and a battery core (2), said casing (1) comprises: a first pole shell (11) made of a conductive material, a second pole shell (12) made of a conductive material and a base shell (13) made of a conductive material, wherein the first pole shell (11) is connected to one end of the base shell (13) in a sealing manner, the second pole shell (12) is connected to the other end of the base shell (13) in a sealing manner, an insulating layer (14) made of an insulating material is arranged between the base shell (13) and the first pole shell (11) as well as between the second pole shell (12) and the base shell (13), a cavity (100) for accommodating the electric core (2) is arranged between the first pole shell (11) and the base shell (13), the electric core (2) comprises a first pole piece (21) and a second pole piece (22) which are wound mutually, the first pole piece (21) and the second pole piece (22) are close to each other, and an isolating film (23) is arranged between the second pole pieces (22) of the first pole piece (21), the upper end surface of the first pole piece (21) protrudes out of the upper end surface of the second pole piece (22), the lower end surface of the second pole piece (22) protrudes out of the lower end surface of the first pole piece (21), the upper end surface of the first pole piece (21) is electrically connected with the first pole shell (11), and the lower end surface of the second pole piece (22) is electrically connected with the second pole shell (12); the middle part of the base shell (13) is provided with a shoulder A (131) and a shoulder B (132) which are bent outwards, so that two ends of the cavity (100) in the base shell (13) are large, the middle of the cavity is small, the edge of the first polar shell (11) is provided with a flanging A (111) buckled with the shoulder A (131), and the edge of the second polar shell (12) is provided with a flanging B (121) buckled with the shoulder B (132).
2. The battery according to claim 1, wherein the first pole shell (11) is provided with a boss A (112) bent outwards; and a boss B (122) bent outwards is arranged on the second pole shell (12).
3. The battery according to claim 1, wherein the first pole case (11) is provided with a reinforced part A (113) for improving the sealing performance between the first pole case (11) and the upper end edge of the base case (13), the reinforced part A (113) is U-shaped, and the upper end edge of the base case (13) is clamped in the reinforced part A (113); the second pole piece shell (12) is provided with a reinforcing part B (123) used for improving the sealing performance between the second pole piece shell (12) and the edge of the lower end of the base shell (13), the reinforcing part B (123) is U-shaped, and the edge of the lower end of the base shell (13) is clamped in the reinforcing part B (123).
4. The battery according to claim 1, wherein a conductive sheet A (31) made of a foam conductive material is arranged between the upper end surface of the first pole piece (21) and the first pole shell (11), and a conductive sheet B (32) made of a foam conductive material is arranged between the lower end surface of the second pole piece (22) and the second pole shell (12).
5. The battery according to claim 1, characterized in that the area of the upper end surface of the first pole piece (21) contacting with the first pole shell (11) is provided with conductive adhesive, and the area of the lower end surface of the second pole piece (22) contacting with the second pole shell (12) is provided with conductive adhesive.
6. The battery according to claim 1, characterized in that the upper end surface of the first pole piece (21) is provided with a convex tooth A for improving the electrical conductivity between the upper end surface of the first pole piece (21) and the first pole shell (11), and the lower end surface of the second pole piece (22) is provided with a convex tooth B for improving the electrical conductivity between the lower end surface of the second pole piece (22) and the second pole shell (12).
7. A battery, characterized in that, said miniature battery comprises a casing (1) and a battery core (2), said casing (1) comprises: the battery comprises a first pole shell (11) made of a conductive material, a second pole shell (12) made of a conductive material and a base shell (13) made of an insulating material, wherein the first pole shell (11) is connected to one end of the base shell (13) in a sealing manner, the second pole shell (12) is connected to the other end of the base shell (13) in a sealing manner, a cavity (100) for accommodating a battery cell (2) is arranged between the first pole shell (11), the second pole shell (12) and the base shell (13), the battery cell (2) comprises a first pole piece (21) and a second pole piece (22) which are wound mutually, the first pole piece (21) and the second pole piece (22) are next to each other, an isolating film (23) is arranged between the second pole piece (22) of the first pole piece (21), the upper end face of the first pole piece (21) protrudes out of the upper end face of the second pole piece (22), and the lower end face of the second pole piece (22) protrudes out of the lower end face of the first pole piece (21), the upper end face of the first pole piece (21) is electrically connected with the first pole shell (11), and the lower end face of the second pole piece (22) is electrically connected with the second pole shell (12); the middle part of the base shell (13) is provided with a shoulder A (131) and a shoulder B (132) which are bent outwards, so that two ends of the cavity (100) in the base shell (13) are large, the middle of the cavity is small, the edge of the first polar shell (11) is provided with a flanging A (111) buckled with the shoulder A (131), and the edge of the second polar shell (12) is provided with a flanging B (121) buckled with the shoulder B (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855073.4A CN111952514B (en) | 2020-08-24 | 2020-08-24 | Battery with a battery cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855073.4A CN111952514B (en) | 2020-08-24 | 2020-08-24 | Battery with a battery cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111952514A true CN111952514A (en) | 2020-11-17 |
| CN111952514B CN111952514B (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010855073.4A Active CN111952514B (en) | 2020-08-24 | 2020-08-24 | Battery with a battery cell |
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| Country | Link |
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| CN (1) | CN111952514B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328198A (en) * | 2021-05-27 | 2021-08-31 | 宁德新能源科技有限公司 | Battery and power consumption device |
| CN113410570A (en) * | 2021-05-27 | 2021-09-17 | 宁德新能源科技有限公司 | Battery and electric device |
| CN113767494A (en) * | 2020-09-30 | 2021-12-07 | 宁德新能源科技有限公司 | Battery and electronic device with same |
| CN113906625A (en) * | 2021-03-22 | 2022-01-07 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
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| GB680697A (en) * | 1951-04-02 | 1952-10-08 | Mallory Batteries Ltd | Improvements in casings or enclosures for electric batteries or electrolytic condensers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113767494A (en) * | 2020-09-30 | 2021-12-07 | 宁德新能源科技有限公司 | Battery and electronic device with same |
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| CN113410570A (en) * | 2021-05-27 | 2021-09-17 | 宁德新能源科技有限公司 | Battery and electric device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111952514B (en) | 2022-04-26 |
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