CN203242716U - Battery, battery type detection circuit and mobile terminal - Google Patents
Battery, battery type detection circuit and mobile terminal Download PDFInfo
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- CN203242716U CN203242716U CN2013201740146U CN201320174014U CN203242716U CN 203242716 U CN203242716 U CN 203242716U CN 2013201740146 U CN2013201740146 U CN 2013201740146U CN 201320174014 U CN201320174014 U CN 201320174014U CN 203242716 U CN203242716 U CN 203242716U
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery, a battery type detection circuit and a mobile terminal. A specific resistor is arranged inside the battery; one end of the specific resistor is grounded; the other end of the specific resistor is connected with a battery type detection pin on the battery; a first resistor, a direct-current power supply and a processing chip are arranged outside the battery; the direct-current power supply is connected with the battery type detection pin on the battery through the first resistor; the processing chip is connected with the battery type detection pin and detects the specific resistor which is arranged inside the battery. By adopting the battery type detection circuit, other types of batteries are distinguished by adopting a design mode that the specific resistor is arranged inside one type of battery, so as to be matched with the battery type detection circuit at the periphery; detection and judgment of the battery type can be automatically finished by a mode of combining software with hardware. Thus, the battery type detection circuit is low in cost, high in identification rate, strong in universality, and suitable for being applied to various mobile terminal platforms; potential safety hazards in a charge process of the battery are well removed.
Description
Technical field
The utility model belongs to the battery detecting technical field, specifically, and the portable terminal that relates to a kind of detection technique for the identification battery types and adopt described battery types detection technique design.
Background technology
Day by day universal along with smart mobile phone, the user is more and more higher to the demand of battery capacity.But, lightening outward appearance is again the Main Trends of The Development of present smart mobile phone, therefore, adopt the increase battery size to realize that the conventional design method that battery capacity promotes just becomes no longer applicable, what need is a kind ofly can in the situation that keeps the battery structure size constancy, effectively promote the solution of battery capacity.
Traditional lithium battery is that maximum supply power/charging voltage is the common batteries of 4.2V, and the lifting of its capacity is difficulty comparatively.For addressing this problem, the high pressure lithium battery occurred on the market at present, namely on the basis of traditional 4.2V lithium battery, the maximum supply power/charging voltage that promotes lithium battery is to about the 4.35V, in the constant situation of physical dimension, its whole volume can promote about 10%.
In smart mobile phone, use the high pressure lithium battery of 4.35V comparatively significantly to promote battery capacity, can be described as a kind of most economical settling mode that present smart mobile phone effectively promotes battery capacity.But the problem of bringing with it is: if the user uses the standard configuration battery, and certain no problem; If but bought third party's battery, when by chance third party's battery is traditional 4.2V common batteries, then can cause the cellphone subscriber when the charging standard of using 4.35V is charged as the common batteries of 4.2V, cause larger charging potential safety hazard, and also can produce very adverse influence to the normal operation of third party's battery.
In order to address this problem, method commonly used is the integrated chip IC in the integrated special use in the inside of high pressure lithium battery at present.After the high pressure lithium battery was inserted into mobile phone, mobile phone can read the information among the IC, and then to judge this battery be the high pressure lithium battery, according to the 4.35V standard charging.If traditional 4.2V lithium battery is inserted in the mobile phone, then mobile phone can't read information among the IC, and then to judge this battery be common batteries, according to the 4.2V standard charging.
Adopt above-mentioned battery types detection scheme, cubic planar defect below main the existence:
The one,, need to be in the high pressure lithium battery built-in integrated chip IC, cause the rising of battery cost.
The 2nd,, need in battery and mobile phone, set up special purpose interface, to realize that cell phone platform is to the access of inside battery IC.Because the difference of interior of mobile phone chip platform, the complexity that special purpose interface is supported is also different.For example: if adopt the monobus access mode, then need to use the single bus interface on the cell phone platform to connect battery, carry out data communication.But for single bus interface, the cell phone platform that has implements relatively easily, but that some cell phone platform implements is just very difficult.
The 3rd,, battery higher temperature rise can occur in the cell-phone charging process, the working temperature that IC is integrated in the very possible IC of generation in the battery exceeds the situation of its ambient temperature that allows, thereby causes the mistake cause thermal damage of IC chip, affects the reliability of high pressure lithium battery work.
The 4th,, integrated chip IC is originally as electrostatic sensitivity device, and battery is as a component of often taking out mobile phone, and its inner integrated IC chip is caused inefficacy than being easier to by the electrostatic damage that human body carries, and then affects battery operated reliability.
Summary of the invention
The problem that the utility model is distinguished the design cost height of battery types, the hardware platform of electronic equipment required harshness in order to solve tradition employing built-in integrated chip in battery, a kind of special battery structure design has been proposed, effectively controlling on the basis of battery cost, can be used for equally realizing the detection judgement of follow-up battery types.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of battery is provided with a specific electrical resistance in the inside of battery, an end ground connection of described specific electrical resistance, and the battery types that the other end connects on the battery detects pin.Described specific electrical resistance only is built in wherein in one type the battery, by detecting in the battery whether be built-in with described specific electrical resistance, can judge is the battery of which kind of type.
In order further to realize the detection identification to standard configuration battery and non-standard configuration battery, preferably adopt resistance to be different from the resistance device of conventional criteria resistance as described specific electrical resistance.
Further, on described battery, be provided with at least four pins, be respectively the positive pin of power supply, power-pin, temperature detection pin and described battery types and detect pin.
Preferably, described battery is preferably the high pressure lithium battery of 4.35V, i.e. built-in described specific electrical resistance in the high pressure lithium battery is to be different from existing common lithium battery.
Based on above-mentioned battery, the utility model has also proposed a kind of battery types testing circuit, is provided with the first resistance, DC power supply and process chip, and described DC power supply detects pin by the battery types that the first resistance connects on the battery; Described battery types detects pin and connects process chip, by process chip the specific electrical resistance that is built in the battery is detected.
In order further to improve the accuracy that specific electrical resistance is detected, in described battery types testing circuit, also be provided with the second resistance and the 3rd resistance, an end of described the second resistance connects described DC power supply, and the other end is by the 3rd grounding through resistance; The resistance of described the second resistance and the first resistance equates, the resistance of built-in specific electrical resistance equates in the 3rd resistance and the battery; Described process chip connects the intermediate node of the second resistance and the 3rd resistance, detects the voltage at the 3rd resistance two ends.By the voltage that compares the specific electrical resistance two ends whether equate with the voltage at the 3rd resistance two ends to judge exactly whether be built-in with specific electrical resistance in the battery, can get rid of thus the erroneous judgement problem that the power supply error causes.
Preferably, described process chip preferably connects one to one with the intermediate node that described battery types detects pin and the second resistance and the 3rd resistance respectively by its two-way analog-to-digital conversion interface, read respectively the magnitude of voltage at specific electrical resistance and the 3rd resistance two ends, to be used for follow-up battery types identifying.
For analog-to-digital conversion interface resource process chip in short supply, can in described battery types testing circuit, set up a gating circuit, described process chip connects the common port of gating circuit by one road analog-to-digital conversion interface, two switch ways of described gating circuit connect one to one with the intermediate node that described battery types detects pin and the second resistance and the 3rd resistance respectively, the control end of described gating circuit connects one road GPIO mouth of process chip, the path switching signal of reception ﹠ disposal chip output, timesharing is read battery types and is detected pin and the 3rd resistance magnitude of voltage over the ground, to be used for follow-up battery types identifying.
Based on above-mentioned battery types testing circuit, the utility model has also proposed a kind of portable terminal, be provided with the first resistance, DC power supply and process chip in described portable terminal, described DC power supply detects pin by the battery types that the first resistance connects on the battery; Described battery types detects pin and connects process chip, by process chip the specific electrical resistance that is built in the battery is detected.
Preferably, described process chip preferably adopts the baseband chip of portable terminal inside, to simplify the circuit structure of portable terminal.
Compared with prior art, advantage of the present utility model and good effect are: the utility model adopts the design of built-in specific electrical resistance in the battery of a certain type, come to distinguish with the battery of other types, and then the peripheral battery types testing circuit of cooperation, the mode of utilizing software and hardware to combine can automatically be finished the detection of battery types is judged, cost is low, discrimination power is high, highly versatile, be fit to be applied on various types of mobile-terminal platforms, and eliminated well the potential safety hazard of battery charging process.
After reading by reference to the accompanying drawings the detailed description of the utility model execution mode, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of embodiment of the battery that proposes of the utility model and battery types testing circuit;
Fig. 2 is the circuit theory diagrams of another embodiment of the battery that proposes of the utility model and battery types testing circuit.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
The high pressure lithium battery is the trend of follow-up embedded in mobile phone battery development, but considers that the charging voltage of high pressure lithium battery is all different from common lithium battery with supply power voltage, can exist larger potential safety hazard if the user in use arbitrarily changes battery.Therefore, present embodiment has proposed a kind of with low cost, simple battery types detection method of realization, be common lithium battery or high pressure lithium battery to identify exactly the battery that is inserted in the mobile phone, and then automatically enable corresponding charging flow, guarantee the fail safe of battery charging process.
The below elaborates concrete structure design and the operation principle thereof of described battery types detection technique take mobile phone as example by a specific embodiment.
Embodiment one, the battery types detection technique of present embodiment is in order to realize the detection identification to two types of batteries, at first needing to select wherein, one type battery carries out structure of modification, then cooperate improved battery design battery types testing circuit, thereby be which kind of type realizes judging fast and accurately to being inserted into battery in the mobile phone.
The below take the high pressure lithium battery of the common lithium battery of 4.2V and 4.35V as described two kinds of dissimilar batteries as example, at first the battery structure after improving is at length set forth in conjunction with Fig. 1.
Be specifically described as example the high pressure lithium battery is carried out architecture advances.A built-in specific resistance device R0 in the high pressure lithium battery; as shown in Figure 1; specifically specific electrical resistance R0 can be welded on the baffle of high pressure lithium battery interior; one end ground connection; the other end connects an individual pin 4 on the high pressure lithium battery; described individual pin 4 can be defined as battery types and detect pin, to be specifically designed to the detection identification of battery types.
Consider for the lithium battery that is applied at present in the mobile phone, form three pins, the i.e. positive pin of power supply, power-pin and temperature detection pin after the cell package that has; Form four pins after the cell package that has, namely except the positive pin 1 of power supply, power-pin 3 and temperature detection pin 2, also increased an extra power pins or IC communication pin or other functional pins, as shown in Figure 1.For present high pressure lithium battery, usually all be designed with four pins, therefore can select the 4th pin 4 except the positive pin 1 of power supply, power-pin 3 and temperature detection pin 2 to detect pin as described battery types, connect described specific electrical resistance R0.
Described specific electrical resistance R0 can select present standard resistor on the market, when being built-in with described specific electrical resistance R0 in detecting battery, can be judged to be the high pressure lithium battery; Otherwise, judge that then the battery that is inserted in the mobile phone is common lithium battery.But, for the consideration of further distinguishing standard configuration high pressure lithium battery and non-standard configuration high pressure lithium battery aspect, present embodiment preferably adopts the resistance device (being the resistance device that resistance is different from the conventional criteria resistance) of special resistance as described specific electrical resistance R0, to be built in the high pressure lithium battery.For example: the resistor that can the custom-made precision be 0.5%, resistance is 9.63K Ω is integrated in the high pressure lithium battery as described specific electrical resistance R0, to realize the effective differentiation with third party's battery.
Below in conjunction with the high pressure lithium battery after improving, the concrete structure design of battery types testing circuit is at length set forth.
In order to realize the effective identification to high pressure lithium battery and common lithium battery, in the battery types testing circuit of present embodiment, be designed with the first resistance R 1, DC power supply VCC and process chip, referring to shown in Figure 1.The battery types that the first resistance R 1 is connected to DC power supply VCC and high pressure lithium battery detects between the pin 4, and the battery types of described high pressure lithium battery is detected pin 4 connect process chip, process chip judges whether be built-in with described specific electrical resistance R0 in the battery by the magnitude of voltage that gathers on the battery types detection pin 4, thereby realizes the identification to battery types.
For mobile phone products, baseband chip on the preferred employing cell phone platform is as described process chip, detect the magnitude of voltage on the battery types detection pin 4, specifically can use the battery types of wherein one tunnel analog-to-digital conversion interface ADC1 connection battery of mobile phone base band chip to detect pin 4, detect the aanalogvoltage of pin 4 outputs to gather battery types, and after converting digital signal to, by moving corresponding battery types recognizer, to realize the accurate differentiation to battery types.Specifically, can utilize the magnitude of voltage of magnitude of voltage Vadc, DC power supply VCC that baseband chip collects and the resistance of the first resistance R 1, utilize formula:
R0=Vadc*R1/(VCC–Vadc) （1）
Calculate the resistance of built-in resistor in the battery.If the resistance (this resistance can be written in the register of baseband chip in advance) of the specific electrical resistance R0 that the resistance that calculates and standard configuration battery producer are selected is consistent, can judge that then the battery that is inserted in the mobile phone is the high pressure lithium battery; If inconsistent, judge that then the battery that is inserted in the mobile phone is common lithium battery, and then finish detection and judgement to battery types.
But, consider present DC power supply VCC, its precision is often not high, usually only has 5% accuracy, the precision of mobile phone base band chip analog-to-digital conversion interface only has the precision about 2% usually, therefore utilize the resistance of the battery built-in resistor that formula (1) calculates to tend to produce deviation with the actual resistance of specific electrical resistance R0, thereby cause the appearance of judging by accident.The impact that the accuracy of testing result is caused in order to get rid of power supply error and/or analog-to-digital conversion sampling interface error, present embodiment preferably adopt other one for example be similarly with the 3rd resistance R 3(of specific electrical resistance R0 similar resistance that precision is 0.5%, resistance is the customization resistance of 9.63K Ω) cooperate the second resistance R 2 and DC power supply VCC, copy the first resistance R 1 and the circuit teaming method of specific electrical resistance R0 to design an other potential-divider network, as shown in Figure 1.That is, with the end connection DC power supply VCC of the second resistance R 2, the other end is by the 3rd resistance R 3 ground connection.Wherein, the second resistance R 2 should be selected the resistance device identical with the first resistance R 1, be connected to by the intermediate node with the second resistance R 2 and the 3rd resistance R 3 on other one tunnel analog-to-digital conversion interface ADC2 of baseband chip, whether the magnitude of voltage that comparison two-way analog-to-digital conversion interface ADC1, ADC2 collect there are differences, if there are differences, then to be built in the resistance of the resistance in the battery different from the resistance of the 3rd resistance R 3 in expression, the resistance that namely is built in the battery is not specific electrical resistance R0, can judge that thus the battery that is inserted in the mobile phone is common lithium battery; Otherwise, if the two-way analog-to-digital conversion interface ADC1 by baseband chip, the magnitude of voltage that ADC2 collects are consistent, then to be built in the resistance of the resistance in the battery identical with the resistance of the 3rd resistance R 3 in expression, the resistance that namely is built in the battery is specific electrical resistance R0, can judge that thus the battery that is inserted in the mobile phone is the high pressure lithium battery.
Adopt battery types measurement circuit design mode shown in Figure 1, can eliminate because the battery types that the inaccuracy that the analog-to-digital conversion interface of DC power supply VCC and/or mobile phone base band chip detects causes is judged problem by accident, thereby greatly improve the accuracy of testing result.
Battery types testing circuit shown in Figure 1 need to take two-way analog-to-digital conversion interface ADC1, the ADC2 of baseband chip, and this obviously can increase the difficulty on the circuit design for analog-to-digital conversion interface resource baseband chip in short supply.In order to address this problem, present embodiment has increased a gating circuit at the internal circuit board of mobile phone, referring to shown in Figure 2, specifically can select a single-pole double-throw switch (SPDT) K1 to carry out circuit design.Wherein one tunnel analog-to-digital conversion interface ADC that the common port of described single-pole double-throw switch (SPDT) K1 is connected mobile phone base band chip, two switch ways of single-pole double-throw switch (SPDT) K1 are connected one to one with the battery types detection pin 4 of battery and the intermediate node of the second resistance R 2 and the 3rd resistance R 3 respectively, the control end of single-pole double-throw switch (SPDT) K1 is connected one road GPIO mouth of baseband chip, receive the path switching signal of baseband chip output.When mobile phone power-on, baseband chip control single-pole double-throw switch (SPDT) K1 carries out gating and switches between two switch ways, and the magnitude of voltage that battery types detects pin 4 and the 3rd resistance R 3 two ends is read in timesharing, whether there are differences by two magnitudes of voltage relatively, and then which kind of type judges the presently used battery of mobile phone be.
In the present embodiment, the battery types testing process is only carried out when mobile phone power-on once, after generating testing result, battery types is write a variable in the handling procedure that baseband chip moves, in order to transfer use in follow-up charging flow.
Baseband chip detects in real time in the use procedure of mobile phone and has or not charger to be inserted on the mobile phone, when having detected charger and be inserted on the mobile phone, at first transfers described variable, judges which kind of type employed battery is in the mobile phone.When if employed battery is the high pressure lithium battery in the mobile phone, then start the battery charging flow of 4.35V, at this moment, battery is full of voltage behind the electricity about 4.35V; If employed battery is common lithium battery in the mobile phone, then start the battery charging flow of 4.2V, at this moment, battery is full of voltage behind the electricity about 4.2V.So both guaranteed that the high pressure lithium battery of 4.35V can be charged to the capacity of nominal, prolonged the stand-by time of mobile phone; Also guaranteed simultaneously the security performance of the common lithium cell charging of 4.2V.
The battery types detection technique that the utility model proposes, hardware cost is low, and simplicity of design is easily gone, and is adapted at large-scale popularization application in the portable terminal products such as mobile phone, panel computer.
Certainly; the above only is a kind of preferred implementation of the present utility model, for those skilled in the art, and under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a battery is characterized in that: be provided with a specific electrical resistance in the inside of battery, an end ground connection of described specific electrical resistance, a battery types detection pin on the other end connection battery.
2. battery according to claim 1, it is characterized in that: the resistance of described specific electrical resistance is different from the resistance of conventional criteria resistance.
3. battery according to claim 1 and 2 is characterized in that: be provided with at least four pins on described battery, be respectively the positive pin of power supply, power-pin, temperature detection pin and described battery types and detect pin.
4. battery according to claim 3, it is characterized in that: described battery is the high pressure lithium battery of 4.35V.
5. battery types testing circuit is characterized in that: be provided with the first resistance, DC power supply and process chip in described battery types testing circuit, described DC power supply detects pin by the battery types that the first resistance connects on the battery; Described battery types detects pin and connects process chip, by process chip the specific electrical resistance that is built in the battery is detected.
6. battery types testing circuit according to claim 5, it is characterized in that: in described battery types testing circuit, also be provided with the second resistance and the 3rd resistance, one end of described the second resistance connects described DC power supply, and the other end is by the 3rd grounding through resistance; Described the second resistance equates with the resistance of the first resistance, and the resistance of built-in specific electrical resistance equates in the 3rd resistance and the battery; Described process chip connects the intermediate node of the second resistance and the 3rd resistance, detects the voltage at the 3rd resistance two ends.
7. battery types testing circuit according to claim 6 is characterized in that: described process chip connects one to one with the intermediate node that described battery types detects pin and the second resistance and the 3rd resistance respectively by its two-way analog-to-digital conversion interface.
8. battery types testing circuit according to claim 6, it is characterized in that: described process chip connects the common port of a gating circuit by one road analog-to-digital conversion interface, two switch ways of described gating circuit connect one to one with the intermediate node that described battery types detects pin and the second resistance and the 3rd resistance respectively, the control end of described gating circuit connects one road GPIO mouth of process chip, the path switching signal of reception ﹠ disposal chip output.
9. a portable terminal is characterized in that: be provided with in described portable terminal such as the described battery types testing circuit of each claim in the claim 5 to 8.
10. portable terminal according to claim 9, it is characterized in that: described process chip is the baseband chip of portable terminal inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201740146U CN203242716U (en) | 2013-04-09 | 2013-04-09 | Battery, battery type detection circuit and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013201740146U CN203242716U (en) | 2013-04-09 | 2013-04-09 | Battery, battery type detection circuit and mobile terminal |
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| CN203242716U true CN203242716U (en) | 2013-10-16 |
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| CN2013201740146U Expired - Fee Related CN203242716U (en) | 2013-04-09 | 2013-04-09 | Battery, battery type detection circuit and mobile terminal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469347A (en) * | 2014-12-08 | 2015-03-25 | 硅谷数模半导体（北京）有限公司 | Detection circuit of video transmission cable and video output chip |
| CN105480105A (en) * | 2014-10-07 | 2016-04-13 | 福特全球技术公司 | Method and apparatus for identifying battery pack types |
| CN107192880A (en) * | 2017-04-28 | 2017-09-22 | 上海与德科技有限公司 | The detection circuit and its detection method of mobile terminal |
| CN107271917A (en) * | 2017-07-19 | 2017-10-20 | 上海鼎为电子科技（集团）有限公司 | Battery detection circuit and mobile terminal |
| CN107797009A (en) * | 2017-11-28 | 2018-03-13 | 郑州云海信息技术有限公司 | A kind of power supply mixed insertion detecting system and power module |
| CN111610731A (en) * | 2020-04-13 | 2020-09-01 | 芜湖宏景电子股份有限公司 | Method for identifying software in different states by using hardware circuit |
| CN115001060A (en) * | 2021-03-01 | 2022-09-02 | 北京小米移动软件有限公司 | Battery protection circuit, battery pack and terminal |
-
2013
- 2013-04-09 CN CN2013201740146U patent/CN203242716U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105480105A (en) * | 2014-10-07 | 2016-04-13 | 福特全球技术公司 | Method and apparatus for identifying battery pack types |
| CN104469347A (en) * | 2014-12-08 | 2015-03-25 | 硅谷数模半导体（北京）有限公司 | Detection circuit of video transmission cable and video output chip |
| CN107192880A (en) * | 2017-04-28 | 2017-09-22 | 上海与德科技有限公司 | The detection circuit and its detection method of mobile terminal |
| CN107271917A (en) * | 2017-07-19 | 2017-10-20 | 上海鼎为电子科技（集团）有限公司 | Battery detection circuit and mobile terminal |
| CN107797009A (en) * | 2017-11-28 | 2018-03-13 | 郑州云海信息技术有限公司 | A kind of power supply mixed insertion detecting system and power module |
| CN111610731A (en) * | 2020-04-13 | 2020-09-01 | 芜湖宏景电子股份有限公司 | Method for identifying software in different states by using hardware circuit |
| CN115001060A (en) * | 2021-03-01 | 2022-09-02 | 北京小米移动软件有限公司 | Battery protection circuit, battery pack and terminal |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20190409 |