CN215418235U - Balanced bottom mass flow structure of cylindrical lithium thionyl chloride battery - Google Patents
Balanced bottom mass flow structure of cylindrical lithium thionyl chloride battery Download PDFInfo
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- CN215418235U CN215418235U CN202121361478.9U CN202121361478U CN215418235U CN 215418235 U CN215418235 U CN 215418235U CN 202121361478 U CN202121361478 U CN 202121361478U CN 215418235 U CN215418235 U CN 215418235U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses an equalizing bottom current collecting structure of a cylindrical lithium thionyl chloride battery, which comprises a stainless steel shell, wherein a lithium sheet is arranged inside the stainless steel shell, a side film is arranged inside the lithium sheet, positive electrode particles are arranged inside the side film, a first cover film is arranged on the top of the positive electrode particles, an equalizing current collector is embedded and mounted on the top of the first cover film, one end of the equalizing current collector extends to the inside of the positive electrode particles, a second cover film is arranged inside the side film, a nickel strip is arranged at the bottom of the second cover film, a cap cover is embedded and mounted inside the top end of the stainless steel shell, a liquid injection port is formed in the top of the cap cover, and a sealing structure is embedded and mounted inside the top of the cap cover. The utility model successfully solves the problem of high-current pulse performance of the cylindrical lithium-thionyl chloride battery, improves the platform voltage of the battery, increases the battery capacity and greatly reduces the reject ratio of the battery. In addition, the battery has the advantages of simple assembly, strong fixity, low production cost, strong safety, no influence on good electrical property of the battery and the like.
Description
Technical Field
The utility model relates to the technical field of lithium thionyl chloride batteries, in particular to an equalizing bottom current collection structure of a cylindrical lithium thionyl chloride battery.
Background
The lithium thionyl chloride battery is the battery with the highest specific energy in the series of practically applied batteries, and can not be charged, and the specific energy can reach 590 W.h/kg and 1100. This highest specific energy value is obtained from large-sized batteries of the high capacity, low discharge rate type. Li/SOCl2 cells are fabricated in a wide variety of sizes and configurations ranging in capacity from cylindrical carbon-on-carbon and wound electrode structure cells down to 400mAh, to prismatic cells up to 10000Ah and many cells of specific sizes and structures that can meet specific requirements. The Li/SOCl2 system inherently has safety and voltage hysteresis problems, wherein safety problems are particularly prone to occur during high discharge rate discharge and overdischarge, while voltage hysteresis is evident when the cell continues to discharge at low temperatures after storage at high temperatures.
The battery in the prior art has the following problems: the polypropylene microporous diaphragm or the glass fiber diaphragm is adopted and is not fixed, and the defects mainly comprise the following points: firstly, a polypropylene microporous diaphragm or a glass fiber diaphragm is easy to damage, so that the insulation effect is lost, and the internal short circuit of the battery is caused;
in the operation process of vacuum liquid injection, the diaphragm can also generate position deviation and shape change along with the vacuumizing in the battery steel shell, so that the battery is easy to lose efficacy, and the liquid injection operation reject ratio of the battery is greatly improved;
and thirdly, under the condition that the battery is inverted, the diaphragm cannot support the positive electrode particles, and the position and the shape of the cover membrane are easy to change, so that the battery is poor in the transferring, transporting and using processes.
Therefore, it is highly desirable to design an equalizing bottom current collecting structure of a cylindrical lithium thionyl chloride battery to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that in the prior art, a polypropylene microporous diaphragm or a glass fiber diaphragm is easy to damage, so that the insulation effect is lost, the internal short circuit of a battery is caused, the diaphragm can also deviate in position and change in shape along with the vacuumizing in a steel shell of the battery, the battery is easy to lose efficacy, and the defect that the defective rate of battery liquid injection operation is greatly improved.
In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides an equalizing bottom mass flow structure of cylindrical lithium thionyl chloride battery, includes the stainless steel shell, the inside of stainless steel shell is provided with the lithium piece, the inside of lithium piece is provided with the limit membrane, the inside of limit membrane is provided with anodal granule, the top of anodal granule is provided with epiphragma one, the balanced mass flow body is installed in the top embedding of epiphragma one, the one end of balanced mass flow body extends to the inside of anodal granule, the inside of limit membrane is provided with epiphragma two, the bottom of epiphragma two is provided with the nickel strap.
The key concept of the technical scheme is as follows: the large-current pulse performance of the cylindrical lithium-thionyl chloride battery is improved, the platform voltage of the battery is improved, the battery capacity is increased, and the reject ratio of the battery is greatly reduced.
Furthermore, a cap is embedded into the top end of the stainless steel shell, and a liquid injection port is formed in the top of the cap.
Further, a sealing structure is embedded in the top of the cap, and a positive electrode is arranged in the sealing structure.
Furthermore, the bottom of the stainless steel shell is provided with a glass fiber basement membrane, and the bottom of the glass fiber basement membrane is provided with a tetrafluoro basement membrane.
The utility model has the beneficial effects that:
1. the method for realizing battery current collection and fixing of the anode particles by the aid of the balance current collectors successfully solves the problems of high-current pulse performance, deformation of carbon particles, position deviation and shape change of the cover film of the cylindrical lithium-thionyl chloride battery, and greatly reduces the reject ratio of the cylindrical lithium-thionyl chloride battery.
2. The nickel strap is connected through the balanced mass flow body that sets up and adopts hard state nickel to positive pole granule and epiphragma have been fixed effectively, even the inside evacuation of battery, and invert the battery, rely on the supporting role of spacer, the change that does not also have the position in the battery inside.
3. The bottom current collection problem of the lithium secondary battery can be realized by adopting the balanced current collector for current collection, the discharge voltage of the lithium secondary battery can be higher than minus V under the same discharge condition, the battery discharge capacity is improved by percent, and the bottom of the positive current collector is closed, so that the pressure of particles on a bottom film can be reduced, the probability of damage of the bottom film is reduced, the platform voltage and the safety performance of the battery are greatly improved, which is one of the greatest advantages of the utility model.
4. The utility model successfully solves the problem of high-current pulse performance of the cylindrical lithium-thionyl chloride battery, improves the platform voltage of the battery, increases the battery capacity, greatly reduces the reject ratio of the battery, and has the advantages of simple assembly, strong fixity, low production cost, strong safety, no influence on the good electrical property of the battery and the like.
Drawings
Fig. 1 is a schematic view of an overall structure of an equalizing bottom current collecting structure of a cylindrical lithium thionyl chloride battery according to the present invention;
fig. 2 is a schematic diagram of an internal structure of an equalized bottom current collecting structure of a cylindrical lithium thionyl chloride battery according to the present invention.
In the figure: 1 stainless steel shell, 2 lithium sheets, 3 side films, 4 positive electrode particles, 5 capping films I, 6 nickel strips, 7 capping films II, 8 sealing structures, 9 liquid injection ports, 10 caps, 11 balanced current collectors, 12 glass fiber bottom films, 13 tetrafluoro bottom films and 14 positive electrodes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1 to 2, an equalizing bottom current collecting structure of a cylindrical lithium thionyl chloride battery includes a stainless steel case 1, a lithium sheet 2 is disposed inside the stainless steel case 1, a side film 3 is disposed inside the lithium sheet 2, a positive electrode particle 4 is disposed inside the side film 3, a first cover film 5 is disposed on the top of the positive electrode particle 4, and an equalizing current collector 11 is embedded in the top of the first cover film 5 to collect current by using the equalizing current collector 11, so that the problem of bottom current collecting of a lithium sub-battery can be solved, under the same discharge condition, the discharge voltage of the lithium sub-battery can be 0.07-0.15V higher, the discharge capacity of the battery can be increased by 2% -5%, and the bottom of the positive electrode set 14 is closed, so that the pressure of the particles on the bottom film can be reduced, thereby reducing the probability of bottom film breakage, greatly improving the platform voltage and safety performance of the battery, which is one of the greatest advantages of the present invention, the method for realizing battery current collection and fixing of the anode particles 4 by the balanced current collector 11 successfully solves the problems of large current pulse performance, deformation of carbon particles, position deviation and shape change of the cover film of the cylindrical lithium-thionyl chloride battery, greatly reduces the fraction defective of the cylindrical lithium-thionyl chloride battery, and ensures that one end of the balanced current collector 11 extends into the anode particles 4, the cover film II 7 is arranged inside the side film 3, the nickel belt 6 is arranged at the bottom of the cover film II 7, and the nickel belt 6 adopts hard nickel, so that the anode particles 4 and the cover film are effectively fixed, even if the battery is vacuumized, and the battery is inverted, and the position of the battery is not changed by depending on the supporting function of the positioning sheet.
As apparent from the above description, the present invention has the following advantageous effects: the method for realizing battery current collection and fixing of the anode particles 4 by the aid of the balance current collectors 11 and the balance current collectors 11 successfully solves the problems of high-current pulse performance, deformation of carbon particles, position deviation and shape change of the cover film of the cylindrical lithium-thionyl chloride battery, and greatly reduces the reject ratio of the cylindrical lithium-thionyl chloride battery.
Further, a cap 10 is embedded into the top end of the stainless steel shell 1, a liquid injection port 9 is formed in the top of the cap 10, and the liquid injection port 9 is used for injecting liquid into the battery.
Further, a sealing structure 8 is embedded in the top of the cap 10, the sealing structure 8 can seal the positive electrode 14, and the positive electrode 14 is arranged inside the sealing structure 8.
Further, the bottom of the stainless steel shell 1 is provided with a glass fiber basement membrane 12, and the bottom of the glass fiber basement membrane 12 is provided with a tetrafluoro basement membrane 13.
By adopting the method, the problem of high-current pulse performance of the cylindrical lithium-thionyl chloride battery is solved, the platform voltage of the battery is improved, the battery capacity is increased, and the reject ratio of the battery is greatly reduced. In addition, the battery has the advantages of simple assembly, strong fixity, low production cost, strong safety, no influence on good electrical property of the battery and the like.
Some preferred embodiments or application examples are listed below to help those skilled in the art to better understand the technical content of the present invention and the technical contribution of the present invention with respect to the prior art:
example 1
A balanced bottom current collecting structure of a cylindrical lithium thionyl chloride battery comprises a stainless steel shell 1, a lithium sheet 2 is arranged inside the stainless steel shell 1, a side film 3 is arranged inside the lithium sheet 2, positive electrode particles 4 are arranged inside the side film 3, a cover film 5 is arranged on the top of the positive electrode particles 4, a balanced current collector 11 is embedded into the top of the cover film 5 and is mounted with the balanced current collector 11 to collect current, the bottom current collecting problem of a lithium subcell battery can be realized, under the same discharge condition, the discharge voltage of the lithium subcell battery can be 0.07-0.15V higher, the discharge capacity of the battery is improved by 2% -5%, the bottom of a positive electrode set 14 is closed, the pressure of particles on a bottom film can be reduced, the damage probability of the bottom film is reduced, the platform voltage and the safety performance of the battery are greatly improved, one of the greatest advantages of the balanced current collector 11 is one of the utility model, and the method for realizing battery current collection and fixing the positive electrode particles 4 is realized by the balanced current collector 11, the problem of cylindrical lithium-thionyl chloride battery's heavy current pulse performance has been solved successfully, the deformation of carbon particle, the skew of epiphragma and the shape change, greatly reduced cylindrical lithium-thionyl chloride battery's defective rate, the one end of balanced mass flow body 11 extends to the inside of anodal granule 4, the inside of limit membrane 3 is provided with epiphragma two 7, the bottom of epiphragma two 7 is provided with nickel strap 6, nickel strap 6 adopts hard state nickel, thereby anodal granule 4 and epiphragma have been fixed effectively, even the inside evacuation of battery, and invert the battery, rely on the supporting role of spacer, the inside change that also does not have the position of battery.
Wherein, a cap cover 10 is embedded and installed in the top end of the stainless steel shell 1, a liquid injection port 9 is formed in the top of the cap cover 10, and the liquid injection port 9 is used for injecting liquid into the battery; the top of the cap 10 is internally embedded with a sealing structure 8, the sealing structure 8 can seal the positive electrode 14, and the positive electrode 14 is arranged inside the sealing structure 8; the bottom of the stainless steel shell 1 is provided with a glass fiber basement membrane 12, and the bottom of the glass fiber basement membrane 12 is provided with a tetrafluoro basement membrane 13.
The working principle is as follows: when in use, the method for realizing battery current collection and fixing the anode particles 4 by the equalizing current collector 11 successfully solves the problems of large current pulse performance, carbon particle deformation, position deviation and shape change of the cover film of the cylindrical lithium-thionyl chloride battery, greatly reduces the reject ratio of the cylindrical lithium-thionyl chloride battery, effectively fixes the anode particles 4 and the cover film by connecting the equalizing current collector 11 with the nickel belt 6 by hard nickel, ensures that the position of the current collector is not changed in the battery even if the battery is internally vacuumized and inverted, and the battery is supported by the positioning sheet, can realize the bottom current collection of the lithium-thionyl battery by the equalizing current collector 11, can improve the discharge voltage of the lithium-thionyl battery by 0.07-0.15V under the same discharge condition, improves the discharge capacity of the battery by 2-5 percent, and adds 14 fluid of the anode collector, the bottom is closed, so that the pressure of particles on the bottom film can be reduced, the probability of damage of the bottom film is reduced, the platform voltage and the safety performance of the battery are greatly improved, the utility model has one of the greatest advantages, the large-current pulse performance of the cylindrical lithium-thionyl chloride battery can be successfully solved, the platform voltage of the battery is improved, the battery capacity is increased, and the reject ratio of the battery is greatly reduced. In addition, the battery has the advantages of simple assembly, strong fixity, low production cost, strong safety, no influence on good electrical property of the battery and the like.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (4)
1. The utility model provides an even bottom mass flow structure of cylindrical lithium thionyl chloride battery, includes stainless steel shell (1), its characterized in that, the inside of stainless steel shell (1) is provided with lithium piece (2), the inside of lithium piece (2) is provided with limit membrane (3), the inside of limit membrane (3) is provided with anodal granule (4), the top of anodal granule (4) is provided with epiphragma one (5), balanced mass flow body (11) are installed in the top embedding of epiphragma one (5), the one end of balanced mass flow body (11) extends to the inside of anodal granule (4), the inside of limit membrane (3) is provided with epiphragma two (7), the bottom of epiphragma two (7) is provided with nickel strap (6).
2. The equalizing bottom current collecting structure of the cylindrical lithium thionyl chloride battery according to claim 1, characterized in that a cap (10) is embedded inside the top end of the stainless steel shell (1), and a liquid filling port (9) is opened on the top of the cap (10).
3. The equalized bottom current collecting structure of cylindrical lithium thionyl chloride battery according to claim 2, characterized in that a sealing structure (8) is embedded inside the top of the cap (10), and a positive electrode (14) is disposed inside the sealing structure (8).
4. The equalizing bottom current collecting structure of the cylindrical lithium thionyl chloride battery according to claim 1, characterized in that a glass fiber bottom film (12) is disposed at the bottom of the stainless steel shell (1), and a tetrafluoro bottom film (13) is disposed at the bottom of the glass fiber bottom film (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121361478.9U CN215418235U (en) | 2021-06-18 | 2021-06-18 | Balanced bottom mass flow structure of cylindrical lithium thionyl chloride battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121361478.9U CN215418235U (en) | 2021-06-18 | 2021-06-18 | Balanced bottom mass flow structure of cylindrical lithium thionyl chloride battery |
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| Publication Number | Publication Date |
|---|---|
| CN215418235U true CN215418235U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121361478.9U Active CN215418235U (en) | 2021-06-18 | 2021-06-18 | Balanced bottom mass flow structure of cylindrical lithium thionyl chloride battery |
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| CN (1) | CN215418235U (en) |
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- 2021-06-18 CN CN202121361478.9U patent/CN215418235U/en active Active
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