CN103872401A - Battery and electronic device - Google Patents
Battery and electronic device Download PDFInfo
- Publication number
- CN103872401A CN103872401A CN201410131489.6A CN201410131489A CN103872401A CN 103872401 A CN103872401 A CN 103872401A CN 201410131489 A CN201410131489 A CN 201410131489A CN 103872401 A CN103872401 A CN 103872401A
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- Prior art keywords
- battery
- thermistor
- battery core
- electronic equipment
- electrolyte
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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
- 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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery and an electronic device. The battery and a battery in the electronic device respectively comprise at least one cell and a thermistor which is arranged in the cell; two electrodes which are opposite in polarity are arranged in the cell, and electrolyte is stored between the two electrodes; the thermistor is immersed in the electrolyte, and one end of the thermistor is connected with one electrode of the cell; the resistance value of the thermistor is increased along with the increment of the temperature inside the cell. By adopting the battery or the battery in the electronic device, the overheat protection can be better realized.
Description
Technical field
The application relates to power supply unit technical field, particularly relates to a kind of battery and electronic equipment.
Background technology
At present, along with the development of Mobile portable equipment, the demand of the capacity of Mobile portable equipment to supplying cell is also increasing.Along with the continuous increase of supplying cell capacity, supplying cell caloric value is in use also increasing.Along with caloric value is increasing, the temperature of supplying cell is also thereupon more and more higher, in the time that the temperature of supplying cell exceedes the scope self can bear, can not work on regard to being easily damaged.Therefore,, in the use procedure of supplying cell, often need according to the temperature of supplying cell, battery to be protected.
At present, to the protection of supplying cell, what mainly adopt is the temperature by obtaining supplying cell outer surface, according to the temperature detecting, supplying cell is carried out to overtemperature protection.But, because the temperature on supplying cell surface is subject to the impact of external environment larger, can not reflect really the temperature of supplying cell, thereby can not protect supplying cell preferably.
Summary of the invention
The application provides a kind of battery and electronic equipment, better supplying cell is carried out to overtemperature protection.
For achieving the above object, the application provides following scheme: a kind of battery, comprising: at least one battery core and be built into the thermistor in described battery core;
In described battery core, be provided with two opposite polarity electrodes, and be filled with electrolyte between described two electrodes;
Described thermistor is immersed in described electrolyte, and one end of described thermistor is connected with an electrode in described battery core; Wherein, the resistance of described thermistor increases along with the increase of described battery core internal temperature.
Preferably, the thermistor that described thermistor is positive temperature coefficient.
Preferably, the thermistor of described positive temperature coefficient is the thermistor of the positive temperature coefficient of operating temperature range in-20 DEG C～60 DEG C.
Preferably, described battery is lithium rechargeable battery.
Preferably, described battery also comprises: be set in the battery case outside described battery core.
On the other hand, the application also provides a kind of electronic equipment, and described electronic equipment comprises shell, and is placed in the battery in described shell;
Described battery comprises at least one battery core and is built into the thermistor in described battery core;
In described battery core, be provided with two opposite polarity electrodes, and be filled with electrolyte between described two electrodes;
Described thermistor is immersed in described electrolyte, and one end of described thermistor is connected with an electrode in described battery core; Wherein, the resistance of described thermistor increases along with the increase of described battery core internal temperature.
Preferably, the thermistor that described thermistor is positive temperature coefficient.
Preferably, the thermistor of described positive temperature coefficient is the thermistor of the positive temperature coefficient of operating temperature range in-20 DEG C～60 DEG C.
Preferably, described battery is lithium rechargeable battery.
Preferably, described battery also comprises: be set in the battery case outside described battery core.
From above-mentioned technical scheme; in the battery core of the application's battery, increase a thermistor; one end of this thermistor is connected with the inside end of a resistance in this battery core; the other end is immersed in the inner electrolyte of filling of this battery core, and in the time that the temperature of battery core inside increases, the resistance of this thermistor can corresponding increase; thereby battery core internal driving increases; limit the increase of battery core internal current, and then effectively reduced the heat production of battery core inside, battery has been carried out to better heat protection.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present application, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiment of the application, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the battery core in this battery in an embodiment of a kind of battery of the application.
Embodiment
The application provides a kind of battery and a kind of electronic equipment, better battery is carried out to overtemperature protection.
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
First a kind of battery in the application is introduced, in this application, this battery at least comprises a battery core, and is built into the thermistor in battery core; This battery core is built-in with two opposite polarity electrodes, and is filled with electrolyte between these two electrodes; This thermistor is immersed in this electrolyte, and one end of this thermistor is connected with an electrode in this battery core.Wherein, the resistance of this thermistor increases along with the increase of battery core internal temperature; therefore; in the time that the temperature of battery core inside increases; the resistance of this thermistor can corresponding increase, and battery core internal driving is increased, and has limited the increase of battery core internal current; and then effectively reduce the heat production of battery core inside, can carry out better heat protection to battery.
Wherein, this battery can be only to include a battery core in this application.This battery can be also the battery pack that includes multiple battery cores, and each battery core in this battery pack is connected mutually.
Below in conjunction with the drawings and specific embodiments, a kind of battery in the application is described in further detail.
Referring to Fig. 1, show the structural representation of the interior battery core of this battery in embodiment of a kind of battery of the application, in this battery, include at least one battery core 100, in this Fig. 1, only draw the structural representation of a battery core, in the time including multiple battery core in this battery, the structure of any one battery core in this battery all can be with reference to shown in Fig. 1.
In the battery core 100 of this battery, be built-in with two opposite polarity electrodes 101.
Between two electrodes of this battery core, be filled with electrolyte 102.Wherein, according to the difference of battery variety, this electrolyte can be different.As, electrolyte can be solid electrolyte, can be also liquid electrolyte.
In this battery core 100, be also provided with thermistor 103, this thermistor is immersed in this electrolyte 102, and one end of this thermistor 103 is connected with an electrode in this battery core.Wherein, the resistance of this thermistor 103 increases along with the increase of battery core internal temperature.
It should be noted that, in thermistor, only have one end to be connected with an electrode in battery core, and the other end of this thermistor is not connected with another electrode.For example, one end of this thermistor can be connected with the anode of this battery core, and is isolated by electrolyte between the other end of this thermistor and the negative electrode of battery core, to ensure the circulation of electric current in battery core.
Be understandable that, in battery core, the rising of temperature causes because electric current in battery core increases, and therefore limits the increase of electric current in battery core, can play the effect of effective reduction battery core internal temperature, and then realizes the heat protection to battery.
Because electric current in battery core is from an electrode stream to another electrode, when having increased in battery core after this thermistor, have electric current this thermistor of flowing through.But because the resistance of thermistor can increase along with the increase of temperature in battery core, therefore, when in battery core when excess Temperature, it is very large that the resistance of this thermistor also can become, will make like this impedance between two electrodes in battery core increase, and then shown the increase of battery core internal current, and then effectively reduce the heat production of battery core.
Visible, in the present embodiment, increased a thermistor in battery core inside, this thermistor is immersed in the electrolyte of battery core, and one end of this thermistor is connected with an electrode in this battery core.In the time that temperature in battery core increases; the resistance of this thermistor increases; thereby the impedance between two electrodes in battery core is increased; limit the increase of electric current between two electrodes; effectively reduce the heat production of battery core inside; and then realized the variation according to internal temperature of battery, effectively battery is carried out to heat protection.
Be understandable that, this battery of the application can be applied in the electronic equipment such as mobile phone, notebook computer, thinks that electronic equipment powers.This battery can be for being used to the battery of any type that electronic equipment powers.
Optionally, consider the extensive use of lithium rechargeable battery in electronic equipment, in the embodiment of the present application, this battery can be lithium rechargeable battery.Wherein, according to the difference of electrolyte used in lithium rechargeable battery, this lithium rechargeable battery can be again liquid lithium ion secondary cell or polymer Li-ion battery.In the time that this battery is liquid lithium ionic cell, in battery core, use liquid electrolyte; In the time that this battery is polymer Li-ion battery, in battery core, be solid polymer electrolyte.
Two electrodes material used in this lithium rechargeable battery can be identical with anode material therefor with negative electrode in existing lithium rechargeable battery respectively.While being lithium rechargeable battery as the embodiment of the present application battery, the cathode material in the battery core of this battery can be cobalt acid lithium, LiMn2O4, ternary material or LiFePO 4 material, and anode can be graphite.
Certainly, in the embodiment of the present application, battery can be also other secondary cells, does not enumerate at this.
In actual applications, consider in the time that the temperature of battery core in battery exceedes particular temperature value, may just need to limit the increase of electric current in battery core, to reduce the rising of temperature in battery core.When the temperature of battery core is during much smaller than this specified temp, may increase without too much Limited Current.Therefore, in order better to ensure the power supply of battery, effectively battery is carried out to heat protection, optional, the thermistor in this battery core can be the thermistor of positive temperature coefficient simultaneously.Wherein, the thermistor of positive temperature coefficient is exceeding certain temperature namely when Curie temperature, and its resistance value is along with the rising of temperature is increasing of step evolution, and temperature is higher, and resistance value is larger.
When being provided with in battery core after the thermistor of this positive temperature coefficient, in the time that the temperature in battery core exceedes Curie temperature corresponding to this thermistor, the increment of the thermistor of this positive temperature coefficient can enlarge markedly, thereby limit the increase of electric current in battery core, and then played the effect that battery core internal temperature raises of controlling.And in the time that the temperature in battery core is less than this Curie temperature, the resistance of the thermistor of this positive temperature coefficient does not have too large variation, thereby can not limit the increase of electric current in battery core, be conducive to the normal power supply of battery.
Optionally, consider that the temperature of electronic equipment generally should be less than 60 DEG C, the thermistor of this positive temperature coefficient can be the thermistor of the positive temperature coefficient of operating temperature range in-20 DEG C～60 DEG C.
Further, in the embodiment of above any one battery, this battery can also comprise the battery case being set in outside this battery core.
Wherein, battery case can play the effect of protection battery core.
On the other hand, the application also provides a kind of electronic equipment, and this electronic equipment comprises shell, and is built into the battery in this shell.
This battery comprises at least one battery core and is built into the thermistor in this battery core;
Wherein, in this battery core, be provided with two opposite polarity electrodes, and be filled with electrolyte between two electrodes.This thermistor is immersed in electrolyte, and one end of this thermistor is connected with an electrode in battery core.
Wherein, the resistance of this thermistor increases along with the increase of battery core internal temperature.
From existing different, the battery core of the battery in this electronic equipment is also built-in with thermistor, in the time that temperature in battery core increases, the resistance of the thermistor in battery core increases, impedance between two electrodes in battery core is increased, increase thereby limited electric current in battery core, and then can effectively reduce the temperature in battery core.
Being understandable that, can be that mobile phone, notebook, panel computer etc. can pass through battery powered electronic equipment at the electronic equipment of the embodiment of the present application.According to the type difference of electronic equipment, the structure of this electronic equipment also can corresponding difference, but in this electronic equipment, the composition structure of battery is identical, and the composition of the battery core in this battery can be with reference to shown in Fig. 1.
The electronic equipment of the present embodiment includes shell and is built into the battery in this shell, and the battery core of this battery comprises the thermistor in the electrolyte being immersed in battery core, and one end of this thermistor is connected with an electrode of this battery core.In the time that the temperature in this battery core increases; the resistance of this thermistor can corresponding increase; thereby the impedance between two electrodes of battery core is increased; limit the increase of electric current in battery core; and then the temperature of effectively having controlled battery core inside increases; more effectively realize the heat protection to battery, improved the fail safe that uses electronic equipment.
Optionally, consider the extensive use of lithium rechargeable battery in electronic equipment, the battery in this electronic equipment can be lithium rechargeable battery.According to the difference of electrolyte used in lithium rechargeable battery, this lithium rechargeable battery can be again liquid lithium ion secondary cell or polymer Li-ion battery.In the time that this battery is liquid lithium ionic cell, in battery core, use liquid electrolyte; In the time that this battery is polymer Li-ion battery, in battery core, be solid polymer electrolyte.
Two electrodes material used in this lithium rechargeable battery can be anodal identical with negative pole material therefor with existing lithium rechargeable battery respectively.If positive electrode in the battery core of the lithium rechargeable battery of the embodiment of the present application can be cobalt acid lithium, LiMn2O4, ternary material or LiFePO 4 material, negative pole can be graphite.
Certainly, in the embodiment of the present application, battery can be also other secondary cells, does not enumerate at this.
Optionally, the thermistor in this battery core can be the thermistor of positive temperature coefficient.Wherein, the thermistor of positive temperature coefficient is exceeding certain temperature namely when Curie temperature, and its resistance value is along with the rising of temperature is increasing of step evolution, and temperature is higher, and resistance value is larger.
When being provided with in battery core after the thermistor of this positive temperature coefficient, in the time that the temperature in battery core exceedes Curie temperature corresponding to this thermistor, the increment of the thermistor of this positive temperature coefficient can enlarge markedly, thereby limit the increase of electric current in battery core, and then played the effect that battery core internal temperature raises of controlling.And in the time that the temperature in battery core is less than this Curie temperature, the resistance of the thermistor of this positive temperature coefficient does not have too large variation, thereby can not limit the increase of electric current in battery core, be conducive to normally powering to electronic equipment of battery.
Optionally, consider that the temperature of electronic equipment generally should be less than 60 DEG C, the thermistor of this positive temperature coefficient can be the thermistor of the positive temperature coefficient of operating temperature range in-20 DEG C～60 DEG C.
Further, in the embodiment of above any one battery, the battery of this electronic equipment can also comprise the battery case being set in outside this battery core.
Wherein, battery case can play the effect of protection battery core.
Finally, also it should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make to comprise that the article of a series of key elements or equipment not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as this article or the intrinsic key element of equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within and comprise in the article of described key element or equipment and also have other identical element.
Through the above description of the embodiments, those skilled in the art can be well understood to the application.In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
Applied principle and the execution mode of specific case to the application herein and set forth, the explanation of above embodiment is just for helping to understand the application's method and core concept thereof; Meanwhile, for one of ordinary skill in the art, according to the application's thought, all will change in specific embodiments and applications.In sum, this description should not be construed as the restriction to the application.
Claims (10)
1. a battery, is characterized in that, comprising: at least one battery core and be built into the thermistor in described battery core;
In described battery core, be provided with two opposite polarity electrodes, and be filled with electrolyte between described two electrodes;
Described thermistor is immersed in described electrolyte, and one end of described thermistor is connected with an electrode in described battery core; Wherein, the resistance of described thermistor increases along with the increase of described battery core internal temperature.
2. battery according to claim 1, is characterized in that, the thermistor that described thermistor is positive temperature coefficient.
3. battery according to claim 2, is characterized in that, the thermistor of described positive temperature coefficient is the thermistor of the positive temperature coefficient of operating temperature range in-20 DEG C～60 DEG C.
4. battery according to claim 1, is characterized in that, described battery is lithium rechargeable battery.
5. battery according to claim 1, is characterized in that, described battery also comprises: be set in the battery case outside described battery core.
6. an electronic equipment, is characterized in that, described electronic equipment comprises shell, and is placed in the battery in described shell;
Described battery comprises at least one battery core and is built into the thermistor in described battery core;
In described battery core, be provided with two opposite polarity electrodes, and be filled with electrolyte between described two electrodes;
Described thermistor is immersed in described electrolyte, and one end of described thermistor is connected with an electrode in described battery core; Wherein, the resistance of described thermistor increases along with the increase of described battery core internal temperature.
7. electronic equipment according to claim 6, is characterized in that, the thermistor that described thermistor is positive temperature coefficient.
8. electronic equipment according to claim 7, is characterized in that, the thermistor of described positive temperature coefficient is the thermistor of the positive temperature coefficient of operating temperature range in-20 DEG C～60 DEG C.
9. electronic equipment according to claim 6, is characterized in that, described battery is lithium rechargeable battery.
10. electronic equipment according to claim 6, is characterized in that, described battery also comprises: be set in the battery case outside described battery core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131489.6A CN103872401B (en) | 2014-04-02 | 2014-04-02 | A kind of battery and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131489.6A CN103872401B (en) | 2014-04-02 | 2014-04-02 | A kind of battery and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103872401A true CN103872401A (en) | 2014-06-18 |
| CN103872401B CN103872401B (en) | 2018-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410131489.6A Active CN103872401B (en) | 2014-04-02 | 2014-04-02 | A kind of battery and electronic equipment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599767Y (en) * | 2003-01-24 | 2004-01-14 | 东莞新能源电子科技有限公司 | Safety polymer secondary lithium ion battery |
| CN101331642A (en) * | 2005-12-14 | 2008-12-24 | 株式会社Lg化学 | Non-aqueous electrolyte and secondary battery comprising the same |
| CN102035039A (en) * | 2009-09-29 | 2011-04-27 | 上海比亚迪有限公司 | High-safety lithium ion battery |
| CN102208678A (en) * | 2011-04-19 | 2011-10-05 | 中南大学 | Safe lithium ion battery |
-
2014
- 2014-04-02 CN CN201410131489.6A patent/CN103872401B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599767Y (en) * | 2003-01-24 | 2004-01-14 | 东莞新能源电子科技有限公司 | Safety polymer secondary lithium ion battery |
| CN101331642A (en) * | 2005-12-14 | 2008-12-24 | 株式会社Lg化学 | Non-aqueous electrolyte and secondary battery comprising the same |
| CN102035039A (en) * | 2009-09-29 | 2011-04-27 | 上海比亚迪有限公司 | High-safety lithium ion battery |
| CN102208678A (en) * | 2011-04-19 | 2011-10-05 | 中南大学 | Safe lithium ion battery |
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| Publication number | Publication date |
|---|---|
| CN103872401B (en) | 2018-08-31 |
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