CN111477966A - Terminal battery protection board, terminal battery and terminal - Google Patents
Terminal battery protection board, terminal battery and terminal Download PDFInfo
- Publication number
- CN111477966A CN111477966A CN201910065024.8A CN201910065024A CN111477966A CN 111477966 A CN111477966 A CN 111477966A CN 201910065024 A CN201910065024 A CN 201910065024A CN 111477966 A CN111477966 A CN 111477966A
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- Prior art keywords
- thermistor
- terminal
- battery
- cavity
- heat
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6571—Resistive heaters
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present disclosure relates to a terminal battery protection board, a terminal battery and a terminal. The terminal battery protection board comprises a protection board body (1) and a thermistor (2) used for detecting the temperature of the battery core, a cavity (3) is formed in the protection board body (1), the thermistor (2) is accommodated in the cavity (3), and the thermistor (2) is abutted with a heat conducting piece and can be contacted with the battery core through the heat conducting piece. Through above-mentioned technical scheme, set up the cavity that holds thermistor alone on the terminal battery protection shield for thermistor can not receive the influence that terminal battery protection shield temperature itself risees, in addition, the thermistor butt has the heat-conducting piece and contacts through heat-conducting piece and electric core, makes the temperature that thermistor listened more be close electric core, and the high rate charge maintenance time is longer, and can reduce the battery and overcharge/overdischarge's safety risk under the abnormal temperature.
Description
Technical Field
The present disclosure relates to the field of electronic devices, and in particular, to a terminal battery protection board, a terminal battery, and a terminal.
Background
In order to meet the ever-increasing higher requirements on the charging speed of terminal equipment such as mobile phones, a large-current high-rate charging mode is gradually popularized. At present, the battery of the terminal such as the mobile phone mainly includes a lithium ion polymer battery, which mainly includes a battery core and a battery protection board, wherein the battery core is a source of battery power, and the battery protection board, i.e., a PCM board, is provided with a thermistor for detecting the temperature of the battery core and related electronic components for protecting the battery according to the detection result. Above a certain temperature (generally 45-60 ℃), the charging current can be reduced for the protection of the battery itself.
At present, a thermistor for detecting the temperature of a battery cell is generally disposed directly on a PCM board or on the surface of the cell. Along with the increase of the current, the temperature of the battery protection board is far higher than the temperature of the battery core, so that the difference between the temperature detected by the thermistor and the actual temperature of the battery core is too large, a battery protection mechanism is triggered, the current is limited too early under the condition of large-current high-rate charging, or the mobile phone is shut down accidentally, and the user experience is influenced; when the thermistor is directly arranged on the surface of the battery core, the battery core is easily scratched due to the very hard material of the thermistor, and the service life of the battery is influenced.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a terminal battery protection plate, a terminal battery, and a terminal.
According to a first aspect of the embodiments of the present disclosure, a terminal battery protection board is provided, which includes a protection board body and a thermistor for detecting a temperature of a battery core, wherein a cavity is formed in the protection board body, the thermistor is accommodated in the cavity, and the thermistor is abutted against a heat conducting member and can be contacted with the battery core through the heat conducting member.
Optionally, the heat conducting member is heat conducting foam, and the heat conducting foam is used for abutting against the battery core.
Optionally, a heat-conducting glue for fixing the thermistor on the inner wall of the cavity is further arranged in the cavity.
Optionally, the heat-conducting foam is fixed on the heat-conducting glue, and the cavity is filled with the heat-conducting glue and the heat-conducting foam.
Optionally, the thermistor is a chip-shaped linear NTC thermistor.
Optionally, a baffle is arranged in the protection plate body, and the baffle and the outer shell of the protection plate body enclose the cavity.
Optionally, a PCM board having a pad is disposed on the outer side of the protection board body in the cavity, and the thermistor includes a solder leg and a temperature sensing probe, and the solder leg passes through the baffle and is connected to the pad.
According to a second aspect of the embodiments of the present disclosure, there is provided a terminal battery, including a battery core and the terminal battery protection board described above, wherein a side of the terminal battery protection board filled with the heat conducting member is in contact with the battery core.
According to a third aspect of the embodiments of the present disclosure, there is provided a terminal including the terminal battery described above.
Optionally, the terminal is a mobile phone.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: offer the cavity that holds thermistor alone on the terminal battery protection shield for thermistor can not receive the influence that terminal battery protection shield itself temperature rose, in addition, the thermistor butt has the heat-conducting piece and contacts through heat-conducting piece and electric core, makes the temperature that thermistor detected more be close to electric core, and the high rate charge maintenance time is longer, and can reduce the safety risk that the battery overcharged/overdischarged under abnormal temperature.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic view illustrating a structure of a terminal battery protection plate according to an exemplary embodiment.
Fig. 2 is a sectional view of a terminal battery protection plate of fig. 1.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
In the present disclosure, unless otherwise stated, "inner" and "outer" are generally referred to the contour of the respective component part itself.
At present, a lithium ion polymer battery commonly used for terminals such as mobile phones comprises a battery core part and a protection plate part. The battery core is a source of battery energy and comprises a positive electrode, a negative electrode, electrolyte and the like. The protection board is fixed with the battery core through low-temperature glue, and comprises a PCM board, a thermistor and the like, wherein electronic elements such as a protection chip and double MOS (metal oxide semiconductor) tubes are attached to the PCM board, and the electronic elements are main sources of heat generated by the battery protection board.
Fig. 1 and fig. 2 are a cross-sectional view of a terminal battery protection board and a cross-sectional view thereof according to an exemplary embodiment, which includes a protection board body 1 and a thermistor 2 for detecting a temperature of a battery cell, a cavity 3 is formed in the protection board body 1, the thermistor 2 is accommodated in the cavity 3, and the thermistor 2 is abutted with a heat conducting member and can be contacted with the battery cell through the heat conducting member. It should be noted here that, in order to enable the heat conducting member to be in physical contact with the battery cell, the cavity 3 is not a completely closed cavity, i.e. at least an opening is formed.
The terminal battery protection board is provided with a cavity 3 for separately accommodating the thermistor 2, and the cavity 3 can be arranged at one end far away from the battery protection board and attached with an electronic element, so that the thermistor 2 is not influenced by the temperature rise of the electronic element. In addition, 2 butts of thermistor of setting in cavity 3 have the heat-conducting piece, and contact with electric core through the heat-conducting piece, the temperature of electric core can directly transmit thermistor 2 for through the heat-conducting piece, make the temperature that thermistor 2 listened compare in the correlation technique directly set up the mode on the PCM protection shield and be closer to the temperature of electric core, when high magnification charges, can not rise in electric core because of the temperature of protection shield, make thermistor 2's temperature listen the deviation that appears, lead to the too early condition that appears the protection forbids the charging to appear, high magnification charge time has been prolonged, and can reduce the safety risk that the battery overcharged/overdischarge under abnormal temperature.
In one embodiment of the present disclosure, as shown in fig. 1 and 2, the heat conducting member may be a heat conducting foam 4, and the heat conducting foam 4 abuts against the battery core. Because the heat conduction foam 4 has flexibility, when the heat conduction foam is abutted to the thermistor 2, a wrapping type contact mode can be formed between the heat conduction foam 4 and the temperature sensing probe 22 of the thermistor 2, the contact area of the heat conduction foam and the temperature sensing probe is increased, and the temperature sensing accuracy of the thermistor 2 is improved. In addition, the heat-conducting foam 4 has excellent properties such as light weight, corrosion resistance, low surface contact resistance and the like.
In some embodiments, in order to relatively fix the position of the thermistor 2 in the cavity 3 and prevent the thermistor 2 from moving freely in the cavity 3, thereby affecting the effect of the thermistor 2 in detecting the cell temperature, a heat-conducting adhesive 7 for fixing the thermistor 2 on the inner wall of the cavity 3 is further disposed in the cavity 3. In addition, the good heat-conducting property of the heat-conducting glue 7 is utilized, so that the thermistor 2 is fixed, and meanwhile, the temperature of the battery cell is not influenced to be transmitted to the thermistor 2 by the heat-conducting foam 4.
In the present disclosure, as shown in fig. 2, the heat conductive foam 4 is fixed on the heat conductive glue 7, and the heat conductive glue 7 and the heat conductive foam 4 fill the cavity 3. The heat conduction foam 4 is fixed on the heat conduction glue 7, so that the position of the heat conduction foam 4 is also kept fixed, the contact area between the heat conduction foam 4 and the thermistor 2 is kept unchanged, and the temperature detection result cannot be influenced by the change of the relative position of the heat conduction foam 4 and the thermistor. The heat-conducting glue 7 and the heat-conducting foam 4 fill the area inside the whole cavity 3, so that the position between the heat-conducting foam 4 and the thermistor 4 is further limited, and the accuracy of temperature measurement is ensured.
In the present disclosure, the thermistor 2 may be a chip linear thermistor. The thermistor 2 has a linear temperature-voltage relationship within a working temperature range, and has the advantages of small volume, light weight, stable performance, high reliability, high mechanical strength and the like. In addition, the linear characteristic of the thermistor enables the output of the temperature measurement result to be more accurate.
According to an embodiment of the present disclosure, as shown in fig. 1, a baffle 5 is disposed in the protection plate body 1, the baffle 5 and the outer shell of the protection plate body 1 enclose a cavity 3, in which case the baffle 5 may be disposed at one side of the protection plate body 1. The baffle 5 can be formed by integral molding with the protection plate body 1 or by a separate method. When baffle 5 and protection shield body 1 integrated into one piece, can guarantee the zonulae occludens between baffle 5 and the protection shield body 1 for the leakproofness of the cavity 3 that forms is better, but integrated into one piece's baffle 5 makes the degree of difficulty of protection shield body 1's manufacturing process also correspondingly improve. Baffle 5 and protection shield body 1 adopt split type, and the two mode of adopting the equipment promptly can not further increase protection shield body 1's the manufacturing degree of difficulty, but can't guarantee to be connected closely all the time between baffle 5 and the protection shield body 1. The specific way to process the baffle 5 can be selected according to actual needs, and the disclosure does not limit this.
As shown in fig. 1 and 2, the PCM board having the pad 6 is disposed outside the cavity 3 of the protection board body 1, and the thermistor 2 includes a leg 21 and a temperature sensing probe 22, and the leg 21 is connected to the pad 6 through the barrier 5. In the present disclosure, the baffle 5 divides the terminal battery protection board into two parts, i.e., a PCM board part and a cavity 3, and the cavity 3 is separated from the PCM board to which the electronic component is attached, so that the temperature rise of the PCM board is not transmitted to the thermistor 2 located in the cavity 3, thereby affecting the temperature measurement result of the thermistor 2. Because the thermistor 2 needs to be electrically connected with the PCM board to detect the temperature and feed back the detection result to the system to judge whether to start the battery charging protection function, the baffle 5 is provided with a hole through which the welding leg 21 of the thermistor 2 can pass, the hole is not too large, the welding leg 21 can pass, and the temperature isolation effect of the baffle 5 is not affected. A land 6 is provided on the PCM board, and a leg 21 of the thermistor 2 passing through the baffle 5 is connected to the land 6.
According to a second aspect of the embodiments of the present disclosure, a terminal battery is provided, which includes a battery core and the aforementioned terminal battery protection board, wherein one side of the terminal battery protection board, which is filled with the heat conducting member, is in contact with the battery core. The one side and the electric core contact that fill of battery protection shield has the heat-conducting piece can be directly give thermistor 2 with the temperature transfer of electric core, and the temperature of thermistor 2 and electric core is closer, and it is more accurate to listen the result. In this embodiment, the arrangement form and the advantageous effects of the terminal battery protection board are the same as those of the terminal battery protection board in the foregoing embodiment, and are not described herein again.
According to a third aspect of the embodiments of the present disclosure, there is provided a terminal, including the aforementioned terminal battery. In the present embodiment, the terminal battery is arranged in the same manner and with the same advantageous effects as those of the terminal battery in the foregoing embodiment.
The terminal referred to in the present disclosure includes, but is not limited to, a mobile phone, a notebook computer, and a tablet computer.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. The utility model provides a terminal battery protection shield, its characterized in that, includes protection shield body (1) and is used for listening thermistor (2) of electric core temperature, cavity (3) have been seted up in protection shield body (1), thermistor (2) hold in cavity (3), thermistor (2) butt has the heat-conducting piece and can pass through the heat-conducting piece with electric core contact.
2. The terminal battery protection plate according to claim 1, wherein the heat conducting member is a heat conducting foam (4), and the heat conducting foam (4) is used for abutting against the battery core.
3. The protective plate for terminal battery as defined in claim 2, wherein a heat conducting glue (7) for fixing the thermistor (2) to the inner wall of the cavity (3) is further provided in the cavity (3).
4. The terminal battery protection plate according to claim 3, wherein the heat conductive foam (4) is fixed on the heat conductive glue (7), and the heat conductive glue (7) and the heat conductive foam (4) fill the cavity (3).
5. The terminal battery protection plate as claimed in claim 1, wherein the thermistor (2) is a chip-type linear NTC thermistor.
6. The protective plate for a terminal battery according to any one of claims 1 to 5, wherein a baffle (5) is arranged in the protective plate body (1), and the baffle (5) encloses the cavity (3) with the outer shell of the protective plate body (1).
7. The terminal battery protection board according to claim 6, wherein the protection board body (1) is provided with a PCM board having a pad (6) at an outer side of the cavity (3), the thermistor (2) includes a fillet (21) and a temperature sensing probe (22), and the fillet (21) is connected with the pad (6) through the baffle (5).
8. An end battery comprising a cell and the end battery protection sheet according to any one of claims 1 to 7, wherein the side of the end battery protection sheet filled with the heat conductive member is in contact with the cell.
9. A terminal, characterized in that it comprises a terminal battery according to claim 8.
10. The terminal of claim 9, wherein the terminal is a mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065024.8A CN111477966B (en) | 2019-01-23 | 2019-01-23 | Terminal battery protection board, terminal battery and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065024.8A CN111477966B (en) | 2019-01-23 | 2019-01-23 | Terminal battery protection board, terminal battery and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111477966A true CN111477966A (en) | 2020-07-31 |
| CN111477966B CN111477966B (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910065024.8A Active CN111477966B (en) | 2019-01-23 | 2019-01-23 | Terminal battery protection board, terminal battery and terminal |
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| Country | Link |
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| CN (1) | CN111477966B (en) |
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| CN106463992A (en) * | 2016-05-27 | 2017-02-22 | 广东欧珀移动通信有限公司 | Battery protection plate, battery and mobile terinal |
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| CN206134864U (en) * | 2016-09-26 | 2017-04-26 | 无锡恩吉威新能源有限公司 | Cylinder type power battery temperature acquisition module |
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2019
- 2019-01-23 CN CN201910065024.8A patent/CN111477966B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1449071A (en) * | 2002-03-30 | 2003-10-15 | 罗伯特·博施有限公司 | Measuring apparatus, energy-storage module and electrical device |
| CN1610144A (en) * | 2003-10-24 | 2005-04-27 | 索尼株式会社 | Battery pile |
| CN1753237A (en) * | 2004-09-24 | 2006-03-29 | 三星Sdi株式会社 | Lithium polymer battery with reinforcement layer and its manufacturing method |
| CN2798328Y (en) * | 2005-04-04 | 2006-07-19 | 比亚迪股份有限公司 | Charging apparatus for secondary battery |
| CN101728583A (en) * | 2008-10-22 | 2010-06-09 | 三星Sdi株式会社 | Protective circuit module and rechargeable battery including protective circuit module |
| CN101997093A (en) * | 2009-08-12 | 2011-03-30 | 三星Sdi株式会社 | Battery pack |
| CN102751454A (en) * | 2011-04-19 | 2012-10-24 | 三星Sdi株式会社 | Battery pack |
| US20130209846A1 (en) * | 2012-02-15 | 2013-08-15 | GM Global Technology Operations LLC | Method and device to measure temperature of a prismatic cell of automotive battery |
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| Publication number | Publication date |
|---|---|
| CN111477966B (en) | 2021-11-23 |
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