CN113745769A - Battery of high security - Google Patents
Battery of high security Download PDFInfo
- Publication number
- CN113745769A CN113745769A CN202110956236.2A CN202110956236A CN113745769A CN 113745769 A CN113745769 A CN 113745769A CN 202110956236 A CN202110956236 A CN 202110956236A CN 113745769 A CN113745769 A CN 113745769A
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- CN
- China
- Prior art keywords
- cover plate
- thermistor
- terminal
- inner core
- battery
- Prior art date
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- Pending
Links
- 230000002159 abnormal effect Effects 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000003792 electrolyte Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000010147 laser engraving Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011076 safety test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010330 laser marking Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
A high-safety battery comprising: the outer shell is arranged outside the whole battery; the inner core is arranged inside the shell; the cover plate is connected with the shell, a closed cavity is formed inside the cover plate, and the inner core is positioned in the closed cavity; the inner core is provided with an inner core positive lug and an inner core negative lug, the cover plate is correspondingly provided with a positive terminal and a negative terminal, and the positive terminal and the negative terminal are in insulated connection with the cover plate; the cover plate is connected with a thermistor and used for monitoring the temperature inside the battery and preventing the battery from being charged when the temperature of the sealed cavity is abnormal.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a high-safety battery.
Background
Along with the outbreak of wearing type product demand, the user improves to the security appeal of product, and traditional box-hat battery can't pass through rigorous safety test, and the high temperature has the risk that arouses bulging or burning in addition, brings fear sense and potential safety hazard for the customer. Therefore, it is a very important problem to improve the safety of the battery.
Disclosure of Invention
The present invention provides a battery with high safety to solve the above-mentioned technical problems.
The technical purpose of the invention is realized by the following technical scheme:
a high-safety battery comprising:
the outer shell is arranged outside the whole battery;
the inner core is arranged inside the shell;
the cover plate is connected with the shell, a closed cavity is formed inside the cover plate, and the inner core is positioned in the closed cavity;
the inner core is provided with an inner core positive lug and an inner core negative lug, the cover plate is correspondingly provided with a positive terminal and a negative terminal, and the positive terminal and the negative terminal are in insulated connection with the cover plate;
the cover plate is connected with a thermistor and used for monitoring the temperature inside the battery and preventing the battery from being charged when the temperature of the closed cavity is abnormal.
Furthermore, the thermistor is an NTC thermistor and is arranged in the closed cavity;
at least 1 NTC terminal is arranged on the cover plate;
the NTC terminal is electrically connected with the thermistor.
Furthermore, the thermistor is a PTC thermistor and is arranged on one end face, away from the closed cavity, of the cover plate;
the cover plate is also provided with a P terminal;
one end of the thermistor is connected with the P terminal, and the other end of the thermistor is connected with the negative terminal.
Further, the shell is integrally formed or a plurality of side plates are welded and formed;
the shape of the shell is arc, curved, planar or abnormal.
Further, the inner core is a pole group or a winding core.
Furthermore, a liquid injection hole is also formed in the cover plate.
Further, still be equipped with explosion-proof valve on the apron, explosion-proof valve is the metal material, and, with apron welded connection.
Furthermore, the closed cavity is filled with electrolyte or electrolyte.
Furthermore, the middle part of the explosion-proof valve is provided with a pressure relief area, the pressure relief area is formed by laser engraving, and the thickness of the pressure relief area is thinner than that of the edge part of the explosion-proof valve.
The invention has the beneficial effects that:
according to the invention, the cover plate is in insulation connection with the electrode terminal, so that the shell can not conduct electricity when the positive electrode and the negative electrode of the inner core are connected with the electrode terminal of the cover plate, and the safety is improved. The thermistor can effectively detect the temperature in the battery, and the battery charging is interrupted when the temperature is abnormal by matching with the protection plate electrically connected with the outside, so that the safety of the battery is enhanced. In addition, the cover plate of the battery is provided with the explosion-proof valve, so that when the internal pressure of the battery is too high, the explosion-proof valve can burst a pressure relief area to release the internal pressure, and the potential safety hazard caused by explosion due to the fact that the internal pressure of the battery is too high and is not effectively released is avoided.
Drawings
FIG. 1 is a schematic diagram of a high-safety battery equipped with an NTC thermistor and having 2 NTC terminals;
FIG. 2 is a schematic diagram of a high-safety battery equipped with an NTC thermistor and having 1 NTC terminal;
FIG. 3 is a schematic view showing a structure of a high-safety battery provided with a PTC thermistor;
FIG. 4 is a schematic view of the structure of the explosion-proof valve;
FIG. 5 is a schematic diagram showing a connection relationship between the NTC thermistor and positive and negative terminals;
fig. 6 is a schematic diagram of an explosion structure in which a case is integrally formed in a high-safety battery;
fig. 7 is a schematic view of an exploded structure of a high-safety battery in which a case is formed by welding a plurality of side plates;
fig. 8 is an exploded view of a high-safety battery in which a case and a cover plate are integrated, and a side plate is welded to the case.
1. A housing; 2. an inner core; 3. a cover plate; 4. sealing the cavity; 5. a thermistor; 21. an inner core positive lug; 22. an inner core negative tab; 31. a positive terminal; 32. a negative terminal; 33. an NTC terminal; 34. a P terminal; 35. a liquid injection hole; 36. an explosion-proof valve; 361. a pressure relief area.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1 to 8, a high-safety battery includes:
the shell 1 is externally arranged outside the whole battery;
an inner core 2 arranged inside the outer shell 1;
the cover plate 3 is connected with the shell 1, a closed cavity 4 is formed inside the cover plate, and the inner core 2 is positioned in the closed cavity 4;
the inner core 2 is provided with an inner core positive lug 21 and an inner core negative lug 22, the cover plate 3 is correspondingly provided with a positive terminal 31 and a negative terminal 32, and the positive terminal 31 and the negative terminal 32 are connected with the cover plate 3 in an insulating way;
the cover plate 3 is connected with a thermistor 5 for monitoring the temperature inside the battery and preventing the battery from being charged when the temperature of the closed cavity 4 is abnormal.
Specifically, the positive terminal 31 and the negative terminal 32 are respectively connected to the core positive tab 21 and the core negative tab 22, and the positive terminal 31 and the negative terminal 32 are connected to the cover plate 3 in an insulated manner, which means that the cover plate 3 is not charged and the entire battery case 1 is not charged, thereby improving safety. The thermistor 5 can detect the temperature in the sealed cavity 4, and when the temperature is abnormal, the thermistor cooperates with an external circuit to interrupt the charging operation of the battery or control the current of different temperature sections. In the present invention, the outer end of the cover plate 3 of the battery is electrically connected to the protection plate, and when the temperature of the battery is abnormal, the thermistor 5 cooperates with the protection plate to interrupt the circuit or control the current magnitude at different temperatures. The protective plate may be provided outside the battery, or may be provided on a mounting plate of the main unit, and is electrically connected to the terminals of the cover plate 3. The case 1 and the lid plate 3 may be made of a metal material or another material, and even if they are made of a conductive material, the case 1 and the lid plate 3 are not charged with electricity because the positive electrode terminal 31 and the negative electrode terminal 32 are connected to the lid plate 3 in an insulated manner.
Optionally, in some embodiments, the thermistor 5 is an NTC thermistor, and is disposed in the sealed cavity 4;
at least 1 NTC terminal 33 is arranged on the cover plate 3;
the NTC terminal 33 is electrically connected to the thermistor 5.
When 1 NTC terminal 33 is provided on the cover plate 3, one end of the thermistor 5 is connected to the NTC terminal 33 and the other end is connected to the negative terminal 32 (as shown in FIG. 2); when 2 NTC terminals 33 are provided on the cover plate 3, both ends of the thermistor 5 are connected to the respective NTC terminals 33 (shown in fig. 1). The external protection plate is connected by a positive terminal 31, a negative terminal 32, and an NTC terminal 33. When the temperature is too high or too low, the charging of the battery is interrupted, so that the safety of the battery is improved.
Optionally, in some embodiments, the thermistor 5 is a PTC thermistor, and is disposed on an end surface of the cover plate 3 facing away from the sealed cavity 4;
the cover plate 3 is also provided with a P terminal 34;
the thermistor 5 has one end connected to the P terminal 34 and the other end connected to the negative terminal 32.
The thermistor 5 has the function of a fuse, and when the temperature is too high or the overcurrent occurs, the current can be directly cut off, so that the battery is protected from safety risks. The thermistor 5 has one end connected to the P terminal 34 and the other end connected to the negative terminal 32, and an external protection plate connected to the P terminal and the positive terminal 31.
The thermistor 5 provided in the battery may be an NTC thermistor or a PTC thermistor, or both an NTC thermistor and a PTC thermistor may be provided, so that safety can be further enhanced.
Optionally, the housing 1 is integrally formed or a plurality of side plates are welded; as shown in fig. 6-8.
The shape of the shell 1 is arc, curved, flat or special.
Optionally, the inner core 2 is a pole group or a roll core.
When the inner core 2 is a pole group, the pole group comprises pole group units stacked layer by layer, and the pole group units comprise diaphragms, positive plates, diaphragms and negative plates which are sequentially stacked. When the inner core 2 is a roll core, the roll core is formed by winding the whole positive plate, the diaphragm and the negative plate.
Optionally, the cover plate 3 is further provided with a liquid injection hole 35.
Can annotate electrolyte after, carry out the pre-seal, then the formation back, with the gaseous exhaust of production, then weld in vacuum environment and seal, or glue is sealed, can accomplish the inside no gas pressure of battery, promotes the security of battery.
Optionally, the cover plate 3 is further provided with an explosion-proof valve 36, and the explosion-proof valve 36 is made of metal and is welded to the cover plate 3.
The explosion-proof valve 36 can burst the explosion-proof valve 36 when the internal pressure of the battery is too high, the internal pressure is unloaded, and the safety risks of explosion or explosion and the like caused by the fact that the internal pressure of the battery is too high and is not released in time and is continuously expanded are prevented.
Optionally, the sealed cavity 4 is further filled with an electrolyte or an electrolyte.
The battery containing the electrolyte can pass a severe safety test, and the safety of the battery is improved. The closed cavity 4 may be filled with an electrolyte or a part of the electrolyte and a part of the electrolyte may be combined.
Optionally, the middle of the explosion-proof valve 36 is provided with a pressure relief area 361, the pressure relief area 361 is formed by laser marking, and the thickness of the pressure relief area 361 is thinner than that of the edge part of the explosion-proof valve 36.
When the internal pressure of the battery is too high, the thinner pressure relief area 361 will be broken first, and the internal pressure will be relieved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A high-safety battery, characterized by comprising:
a case (1) externally provided outside the entire battery;
the inner core (2) is arranged inside the shell (1);
the cover plate (3) is connected with the outer shell (1) and internally forms a closed cavity (4), and the inner core (2) is positioned in the closed cavity (4);
the inner core (2) is provided with an inner core positive lug (21) and an inner core negative lug (22), the cover plate (3) is correspondingly provided with a positive terminal (31) and a negative terminal (32), and the positive terminal (31) and the negative terminal (32) are connected with the cover plate (3) in an insulating way;
the cover plate (3) is connected with a thermistor (5) and used for monitoring the temperature inside the battery and preventing the battery from being charged when the temperature of the closed cavity (4) is abnormal.
2. A high-safety battery according to claim 1, wherein:
the thermistor (5) is an NTC thermistor and is arranged in the closed cavity (4);
at least 1 NTC terminal (33) is arranged on the cover plate (3);
the NTC terminal (33) is electrically connected to the thermistor (5).
3. A high-safety battery according to claim 1, wherein:
the thermistor (5) is a PTC thermistor and is arranged on one end face, deviating from the closed cavity (4), of the cover plate (3);
the cover plate (3) is also provided with a P terminal (34);
one end of the thermistor (5) is connected with the P terminal (34), and the other end is connected with the negative terminal (32).
4. A high-safety battery according to claim 2 or 3, wherein:
the shell (1) is integrally formed or a plurality of side plates are welded;
the shape of the shell (1) is arc, curved, planar or special.
5. A high-safety battery according to claim 2 or 3, wherein:
the inner core (2) is a pole group or a winding core.
6. A high-safety battery according to claim 2 or 3, wherein:
and the cover plate (3) is also provided with a liquid injection hole (35).
7. A high-safety battery according to claim 2 or 3, wherein:
still be equipped with explosion-proof valve (36) on apron (3), explosion-proof valve (36) are the metal material, and, with apron (3) welded connection.
8. A high-safety battery according to claim 2 or 3, wherein:
electrolyte or electrolyte is filled in the closed cavity (4).
9. A high-safety battery according to claim 7, wherein:
the middle part of the explosion-proof valve (36) is provided with a pressure relief area (361), the pressure relief area (361) is formed by laser engraving, and the thickness of the pressure relief area (361) is thinner than that of the edge part of the explosion-proof valve (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110956236.2A CN113745769A (en) | 2021-08-19 | 2021-08-19 | Battery of high security |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110956236.2A CN113745769A (en) | 2021-08-19 | 2021-08-19 | Battery of high security |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113745769A true CN113745769A (en) | 2021-12-03 |
Family
ID=78731880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110956236.2A Pending CN113745769A (en) | 2021-08-19 | 2021-08-19 | Battery of high security |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113745769A (en) |
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| CN209981340U (en) * | 2019-01-18 | 2020-01-21 | 欣旺达电动汽车电池有限公司 | Explosion-proof valve and secondary battery top cover with same |
| CN210668438U (en) * | 2019-09-23 | 2020-06-02 | 荣盛盟固利新能源科技有限公司 | Battery cover plate and battery assembly |
| CN111952487A (en) * | 2020-09-10 | 2020-11-17 | 新余赣锋电子有限公司 | Button cell |
| CN212412135U (en) * | 2020-09-14 | 2021-01-26 | 欣旺达电动汽车电池有限公司 | Battery cover plate assembly and single battery |
| CN111933833A (en) * | 2020-09-21 | 2020-11-13 | 江苏时代新能源科技有限公司 | End cover assembly, battery monomer, battery and power consumption device |
| CN213601923U (en) * | 2020-11-17 | 2021-07-02 | 江苏塔菲尔新能源科技股份有限公司 | Battery top cap and battery |
| CN216085244U (en) * | 2021-08-19 | 2022-03-18 | 新余赣锋电子有限公司 | Battery of high security |
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