CN217086720U - Bipolar buckle type lithium ion battery - Google Patents
Bipolar buckle type lithium ion battery Download PDFInfo
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- CN217086720U CN217086720U CN202220145138.0U CN202220145138U CN217086720U CN 217086720 U CN217086720 U CN 217086720U CN 202220145138 U CN202220145138 U CN 202220145138U CN 217086720 U CN217086720 U CN 217086720U
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Abstract
The utility model relates to an energy storage technology field, concretely relates to bipolar knot formula lithium ion battery. The bipolar button type lithium ion battery comprises a shell, wherein the shell comprises a negative electrode shell and a positive electrode shell which can be disassembled; the lithium ion battery also comprises a bipolar pole piece, a negative pole piece, a positive pole piece and solid electrolyte, wherein the bipolar pole piece, the negative pole piece, the positive pole piece and the solid electrolyte are packaged in the shell, the bipolar pole piece is positioned between the negative pole shell and the positive pole shell, the negative pole piece is arranged between the bipolar pole piece and the negative pole shell, the positive pole piece is arranged between the bipolar pole piece and the positive pole shell, and the solid electrolyte is arranged between the negative pole piece and the bipolar pole piece as well as between the positive pole piece and the bipolar pole piece. The battery can effectively solve the problem of reduction of the service time of the battery due to the generation of contact resistance, improve the rate discharge performance of the battery, save the use amount of shell materials of the button battery and improve the volumetric specific energy and the gravimetric specific energy of the battery.
Description
Technical Field
The utility model relates to an energy storage technology field, concretely relates to bipolar knot formula lithium ion battery.
Background
The button cell battery in the market at present has very extensive application, often needs a plurality of batteries to establish ties in the use, and such a mode of use can produce great contact resistance, shortens the live time of battery. The bipolar button solid lithium/lithium ion battery has the advantages of compact structure, low internal resistance, large specific power and the like. The bipolar button solid lithium/lithium ion battery field in the domestic market is still blank.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcomes the defects of the prior art and provides a bipolar button type lithium ion battery.
The utility model discloses a solve the technical scheme that its technical problem adopted and do: the bipolar button type lithium ion battery comprises a shell, wherein the shell comprises a negative electrode shell and a positive electrode shell which can be disassembled;
the lithium ion battery also comprises a bipolar pole piece, a negative pole piece, a positive pole piece and solid electrolyte, wherein the bipolar pole piece, the negative pole piece, the positive pole piece and the solid electrolyte are packaged in the shell, the bipolar pole piece is positioned between the negative pole shell and the positive pole shell, the negative pole piece is arranged between the bipolar pole piece and the negative pole shell, the positive pole piece is arranged between the bipolar pole piece and the positive pole shell, and the solid electrolyte is arranged between the negative pole piece and the bipolar pole piece as well as between the positive pole piece and the bipolar pole piece.
The utility model discloses set up, the casing is used for fixing and supporting internal component such as negative pole piece, bipolar pole piece, positive pole piece as good electron conductor, casing to play the mass flow effect. The positive pole piece, the negative pole piece and the bipolar pole piece are used for fixing active substances and collecting current; the solid electrolyte is used for lithium ion transmission and conduction between the positive and negative active materials. During packaging, after the negative pole piece, the bipolar pole piece, the positive pole piece and other internal components are arranged, the positive pole shell and the negative pole shell are nested, and the packaging is carried out by adopting the traditional button cell packaging technology.
And the positive shell is sleeved with an insulating sheath. The positive electrode shell is used as a total positive electrode current collector and provided with an insulating sheath, the negative electrode shell is used as a total negative electrode current collector, and the positive electrode shell is embedded into the negative electrode shell during packaging.
An elastic pad is arranged between the positive pole piece and the positive shell, and a gasket is arranged on one side, close to the positive pole piece, of the elastic pad.
The elastic pad is a disc-shaped spring gasket, the two bottom surfaces of the elastic pad are different in size, the smaller bottom surface of the elastic pad is in contact with the positive shell, and the larger bottom surface of the elastic pad is attached to the gasket.
The solid electrolyte is one of a polymer solid electrolyte or an inorganic solid electrolyte. The solid electrolyte is a non-flowing solid, has electronic insulation and lithium ion transmission and conduction functions, and is arranged between the positive pole piece and the bipolar pole piece or the negative pole piece.
The side of the positive pole piece facing the solid electrolyte is coated with active substances, and the two sides of the bipolar pole piece are respectively coated with positive and negative active substances correspondingly. The current collector of the bipolar pole piece is a good electronic conductor, has good binding force with active substances, resists solid electrolyte corrosion, can be a single-material electronic conductor or a composite-material electronic conductor, is coated with positive and negative active substances on two sides respectively, and contacts with the solid electrolyte on the positive and negative active substance sides to form a battery unit with the positive and negative pole pieces or adjacent bipolar pole pieces respectively.
And one side of the negative pole piece facing the solid electrolyte is coated with an active substance. The side coated with the active material is in contact with the solid electrolyte and the bare side is in contact with the inside of the negative casing.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a bipolar button lithium ion battery, which can integrate a plurality of battery units in a battery shell group, save the shell consumption, reduce the battery volume and realize the requirement of multi-volt voltage; the electron transmission area is larger, the transmission path is shorter, the energy loss is reduced, and the rate discharge performance is good; the pollution of the volatilization of the liquid electrolyte to the environment is avoided; the assembly operation process is simple. The battery can effectively solve the problem of reduction of the service time of the battery due to the generation of contact resistance, improve the rate discharge performance of the battery, save the use amount of shell materials of the button battery and improve the volumetric specific energy and the gravimetric specific energy of the battery.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a negative electrode case; 2. a positive electrode case; 3. a bipolar pole piece; 4. a negative pole piece; 5. a positive electrode plate; 6. a solid electrolyte; 7. a spring pad; 8. and (7) a gasket.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings:
example 1
As shown in fig. 1, the bipolar button lithium ion battery includes a casing, which includes a negative casing 1 and a positive casing 2 that can be disassembled;
the lithium ion battery also comprises a bipolar pole piece 3, a negative pole piece 4, a positive pole piece 5 and a solid electrolyte 6 which are packaged in the shell, wherein the bipolar pole piece 3 is positioned between the negative pole shell 1 and the positive pole shell 2, the negative pole piece 4 is arranged between the bipolar pole piece 3 and the negative pole shell 1, the positive pole piece 5 is arranged between the bipolar pole piece 3 and the positive pole shell 2, and the solid electrolyte 6 is arranged between the negative pole piece 4 and the bipolar pole piece 3 and between the positive pole piece 5 and the bipolar pole piece 3.
The positive shell 2 is sleeved with an insulating sheath. The positive electrode shell 2 is used as a total positive electrode current collector and provided with an insulating sheath, the negative electrode shell 1 is used as a total negative electrode current collector, and the positive electrode shell 2 is embedded into the negative electrode shell 1 during packaging.
An elastic pad 7 is arranged between the positive pole piece 5 and the positive shell 2, and a gasket 8 is arranged on one side, close to the positive pole piece 5, of the elastic pad 7.
The elastic pad 7 is a disc spring pad (namely a disc spring), the two bottom surfaces of the elastic pad 7 are different in size, one smaller bottom surface of the elastic pad 7 is in contact with the positive shell 2, and one larger bottom surface of the elastic pad 7 is attached to the pad 8.
The solid electrolyte 6 is one of a polymer solid electrolyte or an inorganic solid electrolyte. The solid electrolyte 6 is a non-flowing solid, has electronic insulation and lithium ion transmission and conduction functions, and is arranged between the positive pole piece and the bipolar pole piece or the negative pole piece.
The side of the positive electrode plate 5 facing the solid electrolyte 6 is coated with active substances, and the two sides of the bipolar electrode plate 3 are respectively coated with positive and negative active substances correspondingly. The current collector of the bipolar pole piece 3 is a good electronic conductor, has good binding force with active substances, resists corrosion of the solid electrolyte 6, the bipolar pole piece 3 can be a single-material electronic conductor or a composite-material electronic conductor, the two sides of the bipolar pole piece are respectively coated with positive and negative active substances, the sides of the positive and negative active substances are both contacted with the solid electrolyte 6, and the positive and negative active substances and the adjacent bipolar pole pieces form a battery unit respectively.
The side of the negative electrode plate 4 facing the solid-state electrolyte 6 is coated with an active substance. The side coated with the active material is in contact with the solid electrolyte 6, and the bare side is in contact with the inside of the negative electrode case 1.
The number of the positive pole piece 5 and the negative pole piece 4 is 1 respectively, and the number of the bipolar pole pieces 3 can be 1 or more.
Example 2
A bipolar button lithium ion battery of 6.4V and 2.5mAh (0.2C) was prepared in accordance with example 1.
The overall external dimension of the shell of the battery shell group is
The size of the gasket 8 is
The elastic pad 7 is 15.4 multiplied by 1mm in size.
With PEO-based solid electrolyte, the ionic conductivity of the solid electrolyte 6 is 1 × 10 -4 Scm -1 Electrolyte physical dimension
The number is 2.
The current collector of the positive pole piece 5 is aluminum foil with the thickness of 12 microns, the active substance is lithium iron phosphate, and the surface density of the positive pole material is 0.01g/cm 2 The size of the positive pole piece 5 is
The current collector of the negative pole piece 4 is copper foil with the thickness of 10 microns, the active substance is artificial graphite, and the surface density of the negative pole material is 0.06g/cm 2 The size of the negative pole piece 4 is
The current collector of the bipolar pole piece 3 is a copper-aluminum composite material with the thickness of 20 microns, one side of the copper material is coated with a negative active material, one side of the aluminum material is coated with a positive active material, and the size of the bipolar pole piece is
The number is 1 piece.
The assembly sequence is as follows: placing the notch of the positive electrode shell 2 upwards on the platform; the elastic pad 7 is placed in the positive electrode shell 2 with the smaller bottom face facing downwards and the larger bottom face facing upwards; placing the gasket 8 above the lower bottom surface of the elastic pad 7; aligning the exposed side of the positive pole piece 5 to the side of the gasket 8, and placing the exposed side of the positive pole piece above the gasket 8; taking 1 solid electrolyte 6, aligning the solid electrolyte 6 with the positive pole piece 5, and placing the solid electrolyte 6 above the positive pole piece 5; the side, coated with the negative active material, of the bipolar pole piece 3 faces the solid electrolyte 6, is aligned with the solid electrolyte 6, and is placed above the solid electrolyte 6; taking 1 solid electrolyte 6, aligning the solid electrolyte 6 with the bipolar pole piece 3, and placing the aligned solid electrolyte 6 above the bipolar pole piece 3; the side of the negative pole piece 4 coated with the negative active material faces the solid electrolyte 6, aligns with the solid electrolyte 6, and is arranged above the solid electrolyte 6; and (3) covering the notch of the negative electrode shell 1 downwards on the assembly in front, and finally packaging the whole assembly on a packaging machine to form the integral bipolar button type lithium ion battery. The formulation or process not mentioned is carried out conventionally.
Claims (7)
1. A bipolar button type lithium ion battery is characterized by comprising a shell, wherein the shell comprises a negative electrode shell (1) and a positive electrode shell (2) which can be disassembled and assembled;
the battery is characterized by further comprising a bipolar pole piece (3), a negative pole piece (4), a positive pole piece (5) and solid electrolyte (6) which are packaged in the shell, wherein the bipolar pole piece (3) is located between the negative pole shell (1) and the positive pole shell (2), the negative pole piece (4) is arranged between the bipolar pole piece (3) and the negative pole shell (1), the positive pole piece (5) is arranged between the bipolar pole piece (3) and the positive pole shell (2), and the solid electrolyte (6) is arranged between the negative pole piece (4) and the bipolar pole piece (3) and between the positive pole piece (5) and the bipolar pole piece (3).
2. The bipolar button lithium ion battery according to claim 1, wherein the positive casing (2) is sleeved with an insulating sheath.
3. The bipolar button lithium ion battery according to claim 1, wherein an elastic pad (7) is arranged between the positive pole piece (5) and the positive shell (2), and a gasket (8) is arranged on one side of the elastic pad (7) close to the positive pole piece (5).
4. The bipolar button lithium ion battery according to claim 3, wherein the elastic pad (7) is a disc spring gasket, two bottom surfaces of the elastic pad (7) are different in size, one smaller bottom surface of the elastic pad (7) is in contact with the positive electrode shell (2), and one larger bottom surface of the elastic pad (7) is attached to the gasket (8).
5. The bipolar button lithium ion battery according to claim 1, wherein the solid electrolyte (6) is one of a polymer solid electrolyte or an inorganic solid electrolyte.
6. The bipolar button lithium ion battery according to claim 1, wherein one side of the positive electrode plate (5) facing the solid electrolyte (6) is coated with active substances, and two sides of the bipolar electrode plate (3) are respectively coated with positive and negative active substances.
7. The bipolar button lithium ion battery according to claim 1, wherein the side of the negative electrode sheet (4) facing the solid electrolyte (6) is coated with an active substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220145138.0U CN217086720U (en) | 2022-01-19 | 2022-01-19 | Bipolar buckle type lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220145138.0U CN217086720U (en) | 2022-01-19 | 2022-01-19 | Bipolar buckle type lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217086720U true CN217086720U (en) | 2022-07-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220145138.0U Active CN217086720U (en) | 2022-01-19 | 2022-01-19 | Bipolar buckle type lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217086720U (en) |
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2022
- 2022-01-19 CN CN202220145138.0U patent/CN217086720U/en active Active
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