CN111725881A - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN111725881A CN111725881A CN201910209430.7A CN201910209430A CN111725881A CN 111725881 A CN111725881 A CN 111725881A CN 201910209430 A CN201910209430 A CN 201910209430A CN 111725881 A CN111725881 A CN 111725881A
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- rechargeable battery
- resistor
- power supply
- transistor
- voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/36—Arrangements using end-cell switching
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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)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a power supply system, comprising: a rechargeable battery; a non-rechargeable battery; the switch unit is used for connecting the rechargeable battery and the non-rechargeable battery with the power supply unit respectively; the power supply device comprises a power supply unit, a power supply unit and a control unit, wherein the power supply unit comprises a temperature detection module and a control module; the temperature detection module is used for detecting the ambient temperature; and the control module is used for controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and the connection between the non-rechargeable battery and the power supply unit according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery. According to the power supply system provided by the embodiment of the invention, the battery can be switched to supply power according to the ambient temperature, so that the power supply system is not influenced by the ambient temperature, and the reliability of power supply is effectively improved.
Description
Technical Field
The invention relates to the technical field of energy supply, in particular to a power supply system.
Background
With the continuous development and progress of internet technology and the increasing promotion of global terminal product intelligence, more and more intelligent electronic devices are used in daily work and life, meanwhile, the requirements of users on the working time and the standby time of the intelligent electronic devices are higher and higher, and the power supply stability of the electronic devices directly influences the working performance of the electronic devices.
In the related art, the power supply time is increased by supplying power through the double batteries, for example, by judging whether the battery loop meets a preset power supply switching condition (for example, the level of an endpoint of a control end is high or low), and switching the battery loop for supplying power.
However, although the above-mentioned dual-battery power supply method improves the power supply duration, it is greatly affected by the ambient temperature (such as ultra-high temperature or ultra-low temperature), and the reliability of power supply is greatly reduced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a power supply system, which can switch the battery power supply according to the ambient temperature, so that the power supply system is not influenced by the ambient temperature, and the reliability of power supply is effectively improved.
To achieve the above object, an embodiment of the present invention provides a power supply system, including: a rechargeable battery; a non-rechargeable battery; the switch unit is used for connecting the rechargeable battery and the non-rechargeable battery with a power supply unit respectively; the power supply unit comprises a temperature detection module and a control module; the temperature detection module is used for detecting the ambient temperature; the control module is used for controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and the connection between the non-rechargeable battery and the power supply unit according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery.
In addition, the power supply system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the power supply system further includes: a power source; the charging management module is used for connecting the power supply with the rechargeable battery; the control module is further configured to: and controlling the charging management module to charge the rechargeable battery according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery.
According to one embodiment of the present invention, the switching unit includes: the rechargeable battery is connected with the powered unit through the first switch module; and the non-rechargeable battery is connected with the power supply unit through the second switch module.
According to an embodiment of the present invention, the power supply system further includes: the control module acquires the voltage of the rechargeable battery through the first voltage sampling module; and the control module acquires the voltage of the non-rechargeable battery through the second voltage sampling module.
According to an embodiment of the present invention, the control module is specifically configured to: if the ambient temperature is equal to or greater than a first set temperature and less than a second set temperature, or the ambient temperature is greater than a fifth set temperature and equal to or less than a sixth set temperature, controlling the charging management module to stop charging the rechargeable battery, and judging whether the voltage of the non-rechargeable battery is greater than a first over-discharge protection voltage threshold, wherein the fifth set temperature is greater than the second set temperature; if so, controlling the switch unit to switch on the connection between the non-rechargeable battery and the power supply unit and switch off the connection between the rechargeable battery and the power supply unit; if not, controlling the switch unit to disconnect the connection between the non-rechargeable battery and the power supply unit and the connection between the rechargeable battery and the power supply unit.
According to an embodiment of the invention, the control module is further configured to: if the environment temperature is equal to or greater than the second set temperature and equal to or less than the fifth set temperature, judging whether the environment temperature is equal to or greater than a third set temperature and less than or equal to a fourth set temperature, wherein the third set temperature is greater than the second set temperature, and the fourth set temperature is less than the fifth set temperature; if yes, controlling the charging management module to charge the rechargeable battery; if not, controlling the charging management module to stop charging the rechargeable battery; judging whether the voltage of the rechargeable battery is greater than a second over-discharge protection voltage threshold value or not; if the voltage is larger than the second over-discharge protection voltage threshold, controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and switch off the connection between the non-rechargeable battery and the power supply unit; and if the voltage is equal to or less than the second over-discharge protection voltage threshold, returning to the step of judging whether the voltage of the non-rechargeable battery is greater than the first over-discharge protection voltage threshold.
According to an embodiment of the invention, the control module is further configured to: and if the environment temperature is lower than the first set temperature or higher than the sixth set temperature, controlling the switch unit to disconnect the connection between the non-rechargeable battery and the power supply unit and the connection between the rechargeable battery and the power supply unit.
According to one embodiment of the invention, the first voltage sampling module comprises: a first resistor, a first end of the first resistor being connected to the rechargeable battery; a control end of the first transistor is connected with the control module, a first end of the first transistor is connected with a second end of the first resistor, and the second end of the first transistor is grounded; a first end of the second resistor is connected with the control end of the first transistor, and a second end of the second resistor is grounded; a control end of the second transistor is connected with the second end of the first resistor, and a first end of the second transistor is connected with the first end of the first resistor; a first end of the third resistor is connected with the second end of the second transistor, and a second end of the third resistor is connected with the control module; and a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is grounded.
According to one embodiment of the invention, the first switching module comprises: a third transistor, a first terminal of which is connected to the rechargeable battery; a fourth transistor, a first terminal of the fourth transistor being connected to a second terminal of the third transistor, a second terminal of the fourth transistor being connected to the power-supplied unit; a first end of the fifth resistor is connected with the control end of the third transistor, and a second end of the fifth resistor is connected with a direct current power supply; and a first end of the sixth resistor is respectively connected with the control end of the fourth transistor and the first end of the fifth resistor, and a second end of the sixth resistor is connected with the control module.
According to an embodiment of the invention, the first switching module further comprises: a first diode having an anode connected to the rechargeable battery and a cathode connected to the powered unit.
According to an embodiment of the invention, the second voltage sampling module comprises: a seventh resistor, a first end of the seventh resistor being connected to the non-rechargeable battery; a control end of the fifth transistor is connected with the control module, a first end of the fifth transistor is connected with a second end of the seventh resistor, and a second end of the fifth transistor is grounded; a first end of the eighth resistor is connected with the control end of the fifth transistor, and a second end of the eighth resistor is grounded; a control end of the sixth transistor is connected with the second end of the seventh resistor, and a first end of the sixth transistor is connected with the first end of the seventh resistor; a ninth resistor, a first end of the ninth resistor being connected to the second end of the sixth transistor, and a second end of the ninth resistor being connected to the control module; a tenth resistor, a first end of the tenth resistor being connected to the second end of the ninth resistor, and a second end of the tenth resistor being grounded.
According to one embodiment of the invention, the second switch module comprises: a seventh transistor, a first terminal of which is connected to the non-rechargeable battery; a seventh transistor, a first terminal of which is connected to the second terminal of the sixth transistor, and a second terminal of which is connected to the power supply unit; a first end of the eleventh resistor is connected with the control end of the seventh transistor, and a second end of the eleventh resistor is connected with a direct current power supply; and a first end of the twelfth resistor is respectively connected with the control end of the eighth transistor and the first end of the eleventh resistor, and a second end of the twelfth resistor is connected with the control module.
According to an embodiment of the invention, the second switch module further comprises: a second diode having an anode connected to the non-rechargeable battery and a cathode connected to the powered unit.
According to the power supply system provided by the embodiment of the invention, the temperature detection module is used for detecting the ambient temperature, and the control module is used for controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and between the non-rechargeable battery and the power supply unit according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery. Therefore, the rechargeable battery is controlled to work at normal temperature and ambient temperature, the non-rechargeable battery is controlled to work at ultrahigh temperature or ultralow temperature, the power supply system is effectively prevented from being influenced by the ambient temperature, under the condition that the working temperature is allowed, the rechargeable battery is switched to the non-rechargeable battery to continue to supply power before the rechargeable battery is powered off, and the reliability of power supply is effectively improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block schematic diagram of a power supply system according to an embodiment of the invention;
FIG. 2 is a block schematic diagram of a power supply system according to one embodiment of the invention;
FIG. 3 is a block schematic diagram of a power supply system according to another embodiment of the invention;
FIG. 4 is a schematic diagram of a supply temperature interval according to one embodiment of the present invention;
FIG. 5 is a circuit schematic of a power supply system according to one embodiment of the invention;
fig. 6 is a flow chart of the operation of a power supply system according to one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A power supply system proposed according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Under general conditions, for example, the rechargeable battery can work at-40 ℃ to 85 ℃ and only has military battery products, while the working temperature of common civil rechargeable batteries is generally about-20 ℃ to 65 ℃, and non-rechargeable batteries with the working temperature of-40 ℃ to 145 ℃ are available on the market.
Therefore, when the double batteries are used for supplying power, if all the common civil rechargeable batteries are used, the double batteries cannot normally work in an ultralow temperature or ultrahigh temperature environment; if the non-rechargeable battery is used completely, the resource waste is caused, and the reliability of power supply is greatly reduced.
Therefore, in order to solve the above problems, the power supply system according to the embodiment of the present application controls the corresponding batteries to operate at different temperatures, so as to ensure that the power supply system is not affected by the ambient temperature, and effectively improve the reliability of power supply.
Fig. 1 is a block schematic diagram of a power supply system of an embodiment of the present invention. As shown in fig. 1, the power supply system includes: the rechargeable battery 10, the non-rechargeable battery 20, the switching unit 30, the power-supplied unit 40, the temperature detection module 50, and the control module 60.
Wherein the rechargeable battery 10 and the non-rechargeable battery 20 are connected to the power-supplied unit 40 through the switching unit 30, respectively. The powered unit 40 includes a temperature detection module 50 and a control module 60; the temperature detection module 50 is used for detecting the ambient temperature. The control module 60 is configured to control the switch unit 30 to switch on the connection between the rechargeable battery 10 and the powered unit 40 and between the non-rechargeable battery 20 and the powered unit 40 according to the ambient temperature, the voltage of the rechargeable battery 10, and the voltage of the non-rechargeable battery 20.
It is understood that the correspondence relationship between the rechargeable battery 10 and the non-rechargeable battery 20 and the ambient temperature may be preset, and the control module 60 controls the switching unit 30 to switch on the connection between the rechargeable battery 10 and the power-supplied unit 40 and between the non-rechargeable battery 20 and the power-supplied unit 40 according to the ambient temperature, the voltage of the rechargeable battery 10 and the voltage of the non-rechargeable battery 20 after the ambient temperature is detected by the temperature detection module 50.
In summary, according to the power supply system of the embodiment of the invention, the temperature detection module detects the ambient temperature, and the control module controls the switch unit to switch on the connection between the rechargeable battery and the power-supplied unit and the connection between the non-rechargeable battery and the power-supplied unit according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery. The rechargeable battery is controlled to work at normal temperature and ambient temperature, and the non-rechargeable battery is controlled to work at ultrahigh temperature or ultralow temperature, so that the power supply system is not influenced by the ambient temperature, and the reliability of power supply is effectively improved.
According to an embodiment of the present invention, as shown in fig. 2, the power supply system further includes: a power supply 70 and a charge management module 80. Wherein the power supply 70 is connected to the rechargeable battery 10 through the charge management module 80. The control module 40 is further configured to: the charging management module 80 is controlled to charge the rechargeable battery 10 according to the ambient temperature, the voltage of the rechargeable battery 10 and the voltage of the non-rechargeable battery 20.
It is understood that the rechargeable battery 10 is a reusable battery, and in order to ensure the recycling of the rechargeable battery 10, the power supply 70 may be connected to the rechargeable battery 10 through the charge management module 80, and the rechargeable battery 10 may be charged through the charge management module 80 according to the ambient temperature, the voltage of the rechargeable battery 10, and the voltage of the non-rechargeable battery 20. It should be noted that the power source 70 may include, but is not limited to, an adapter.
According to an embodiment of the present invention, as shown in fig. 3, the switching unit 30 includes: a first switching module 31 and a second switching module 32. The rechargeable battery 10 is connected to the powered unit 40 through the first switch module 31. The non-rechargeable battery 20 is connected to the powered unit 40 through the second switching module 32.
According to an embodiment of the present invention, the power supply system further includes: the device comprises a first voltage sampling module and a second voltage sampling module. The control module 60 obtains the voltage of the rechargeable battery 10 through the first voltage sampling module. The control module 60 acquires the voltage of the non-rechargeable battery 20 through the second voltage sampling module.
For ease of understanding, how the control module 60 switches on the connection between the rechargeable battery 10 and the power-supplied unit 40 and between the non-rechargeable battery 20 and the power-supplied unit 40 according to the ambient temperature, the voltage of the rechargeable battery 10, and the voltage of the non-rechargeable battery 20 will be described below in a specific embodiment.
For example, a plurality of temperatures, such as a first set temperature T0, a second set temperature T1, a third set temperature T2, a fourth set temperature T3, a fifth set temperature T4 and a sixth set temperature T5, may be preset in the embodiment of the present invention. Thus, assuming that the ambient temperature is T, the set temperature may be divided into the ambient temperature sections, and as shown in fig. 4, the ambient temperature section 1: t is not less than T0 and less than T1, which is an ultralow temperature environment temperature interval, and the environment temperature interval is 2: t is greater than or equal to T1 and less than T4, and is a normal-temperature environment temperature range, wherein the environment temperature range 2 comprises an environment temperature range 3: t2 is more than or equal to T < T3, the environment temperature interval 3 is the chargeable temperature range of the chargeable battery 10, and the environment temperature interval 4: t is equal to or more than T4 and is less than T5, and the temperature range is an ultrahigh-temperature environment temperature range. It should be noted that, in fig. 4, the temperature values corresponding to T0, T1, T2, T3, T4, and T5 are only exemplary, and the values of T0 to T5 may be set according to actual situations, and are not limited specifically here.
According to an embodiment of the present invention, the control module 60 is specifically configured to: if the ambient temperature T is equal to or greater than the first set temperature T0 and less than the second set temperature T1, or the ambient temperature T is greater than the fifth set temperature T4 and equal to or less than the sixth set temperature T5, controlling the charging management module 80 to stop charging the rechargeable battery 10, and determining whether the voltage of the non-rechargeable battery 20 is greater than the first over-discharge protection voltage threshold, wherein the fifth set temperature T4 is greater than the second set temperature T1; if so, controlling the switching unit 30 to turn on the connection between the non-rechargeable battery 20 and the power-supplied unit 40 and turn off the connection between the rechargeable battery 10 and the power-supplied unit 40; if not, the control switch unit 30 disconnects the connection between the non-rechargeable battery 20 and the power-supplied unit 40 and between the rechargeable battery 10 and the power-supplied unit 40. The first over-discharge protection voltage threshold may be set according to an actual situation, and is not limited specifically herein.
It should be understood that when the ambient temperature T is equal to or greater than the first set temperature T0 and less than the second set temperature T1, it indicates that it is currently in the ultra-low-temperature ambient temperature interval; when the ambient temperature T is greater than the fifth set temperature T4 and equal to or less than the sixth set temperature T5, it indicates that it is currently in the ultra-low-temperature ambient temperature interval.
Therefore, when the ambient temperature T is equal to or greater than the first set temperature T0 and less than the second set temperature T1, or the ambient temperature T is greater than the fifth set temperature T4 and equal to or less than the sixth set temperature T5, the charging management module 80 may be controlled to stop charging the rechargeable battery 10 to improve the safety of the rechargeable battery 10, and determine whether the voltage of the non-rechargeable battery 20 is greater than the first over-discharge protection voltage threshold, and when the voltage of the non-rechargeable battery 20 is greater than the first over-discharge protection voltage threshold, the switching unit 30 is controlled to turn on the connection between the non-rechargeable battery 20 and the powered unit 40, and turn off the connection between the rechargeable battery 10 and the powered unit 40 to ensure that the power supply system is always in the power supply state, thereby improving the reliability of power supply.
In addition, if the voltage of the non-rechargeable battery 20 is not greater than the first overdischarge protection voltage threshold, the power supply system powers down the process of controlling the switching unit 30 to disconnect the connection between the non-rechargeable battery 20 and the power-supplied unit 40 and between the rechargeable battery 10 and the power-supplied unit 40.
According to one embodiment of the invention, the control module 60 is further configured to: if the ambient temperature T is equal to or greater than the second set temperature T1 and equal to or less than the fifth set temperature T4, determining whether the ambient temperature T is equal to or greater than the third set temperature T2 and less than or equal to the fourth set temperature T3, the third set temperature T2 is greater than the second set temperature T1, and the fourth set temperature T3 is less than the fifth set temperature T4; if yes, controlling the charging management module 80 to charge the rechargeable battery 10; if not, controlling the charging management module 80 to stop charging the rechargeable battery 10; judging whether the voltage of the rechargeable battery 10 is greater than a second over-discharge protection voltage threshold value; if the second over-discharge protection voltage is greater than the second over-discharge protection voltage threshold, the control switch unit 30 switches on the connection between the rechargeable battery 10 and the power-supplied unit 40 and switches off the connection between the non-rechargeable battery 20 and the power-supplied unit 40; if the voltage is equal to or less than the second over-discharge protection voltage threshold, returning to the step of judging whether the voltage of the non-rechargeable battery 20 is greater than the first over-discharge protection voltage threshold. The second over-discharge protection voltage threshold may be set according to an actual situation, and is not limited specifically here.
It should be understood that when the ambient temperature T is equal to or greater than the second set temperature T1 and equal to or less than the fifth set temperature T4, indicating that it is currently in the normal ambient temperature zone, i.e., whether the voltage of the rechargeable battery 10 is greater than the second over-discharge protection voltage threshold, the connection between the rechargeable battery 10 and the power-supplied unit 40 is turned on, the connection between the non-rechargeable battery 20 and the power-supplied unit 40 is turned off, and the connection between the non-rechargeable battery 20 and the power-supplied unit 40 is turned off by controlling the switch unit 30. It should be noted that, if the ambient temperature T is equal to or greater than the third set temperature T2 and less than or equal to the fourth set temperature T3, the charging management module 80 may be further controlled to charge the rechargeable battery 10, otherwise, the charging management module 80 is controlled to stop charging the rechargeable battery 10, where the third set temperature T2 is greater than the second set temperature T1, and the fourth set temperature T3 is less than the fifth set temperature T4. Therefore, under the condition that the working temperature and the temperature are allowed, before the rechargeable battery 10 is powered off, the rechargeable battery 20 is switched to continue to supply power, the power supply system is ensured to be always in a power supply state, and the reliability of power supply is effectively improved.
In addition, if the voltage of the rechargeable battery 10 is equal to or less than the second over-discharge protection voltage threshold, the step of determining whether the voltage of the non-rechargeable battery 20 is greater than the first over-discharge protection voltage threshold is returned.
According to one embodiment of the invention, the control module 60 is further configured to: if the ambient temperature T is less than the first set temperature T0 or greater than the sixth set temperature T5, the control switch unit 30 disconnects the connection between the non-rechargeable battery 20 and the power-supplied unit 40 and between the rechargeable battery 10 and the power-supplied unit 40.
It should be understood that when the ambient temperature T is less than the first set temperature T0 or greater than the sixth set temperature T5, beyond the operating temperature ranges of the rechargeable battery 10 and the non-rechargeable battery 20, the switch unit 30 may be controlled to disconnect the connection between the non-rechargeable battery 20 and the powered unit 40 and between the rechargeable battery 10 and the powered unit 40, so as to prolong the service life of the battery and improve the reliability of the power supply system.
For ease of understanding, the power supply system of an embodiment of the present invention is shown below in connection with an exemplary embodiment. As shown in fig. 5, the circuit diagram may use labels to indicate signal transmission between lines, for example, the label "CHARGE _ EN" indicates signal transmission between the CHARGE management module 80 and the control module 40, and the labels "BAT _ UN _ CHARGE, BAT _ UN _ CHARGE _ ADC _ EN, BAT _ CHARGE _ ADC, BAT _ CHARGE _ ADC _ EN" all indicate signal transmission between lines, and detailed description is omitted herein to avoid redundancy. It should be noted that the circuit is only exemplary and not limiting to the present invention.
According to an embodiment of the present invention, as shown in fig. 5, the first voltage sampling module includes: the circuit comprises a first resistor R7, a first transistor Q8, a second resistor R11, a second transistor Q7, a third resistor R10 and a fourth resistor R12. A first terminal of the first resistor R7 is connected to the rechargeable battery 10. The control terminal of the first transistor Q8 is connected to the control module 60, the first terminal of the first transistor Q8 is connected to the second terminal of the first resistor R7, and the second terminal of the first transistor Q8 is connected to ground. A first end of the second resistor R11 is connected with the control end of the first transistor Q8, and a second end of the second resistor R11 is grounded; the control terminal of the second transistor Q7 is connected to the second terminal of the first resistor R7, and the first terminal of the second transistor Q7 is connected to the first terminal of the first resistor R7. A first terminal of the third resistor R10 is connected to the second terminal of the second transistor Q7, and a second terminal of the third resistor R10 is connected to the control module 60; the first end of the fourth resistor R12 is connected to the second end of the third resistor R10, and the second end of the fourth resistor is grounded.
It should be understood that, as shown in fig. 5, the first voltage sampling module may be composed of a first resistor R7, a first transistor Q8, a second resistor R11, a second transistor Q7, a third resistor R10 and a fourth resistor R12 for detecting the voltage of the rechargeable battery 10.
Specifically, as shown in fig. 5, the BAT _ handle _ ADC _ EN is set high, so that the first transistor Q8 is turned on, the first transistor Q8 is turned on, the second transistor Q7 is turned on, the voltage of the rechargeable battery 10 is conducted to the third resistor R10, and the battery voltage V of the rechargeable battery 10 is set highchargeSampling is enabled such that the divided voltage from the third resistor R10 and the fourth resistor R12 is sampled by the control module 60 to obtain the voltage V of the rechargeable battery 10chargeAfter the read, BAT _ handle _ ADC _ EN is set low to conserve battery power.
According to an embodiment of the present invention, as shown in fig. 5, the first switch module includes: a third transistor Q5, a fourth transistor Q6, a fifth resistor R8, and a sixth resistor R9. Wherein a first terminal of the third transistor Q5 is connected to the rechargeable battery 10. A first terminal of the fourth transistor Q6 is connected to the second terminal of the third transistor Q5, and a second terminal of the fourth transistor Q6 is connected to the powered unit 40. A first terminal of the fifth resistor R8 is connected to the control terminal of the third transistor Q5, and a second terminal of the fifth resistor R8 is connected to the dc power VCC. A first terminal of the sixth resistor R9 is coupled to the control terminal of the fourth transistor Q6 and the first terminal of the fifth resistor R8, respectively, and a second terminal of the sixth resistor R9 is coupled to the control module 60.
It is understood that the first switching module may be composed of a third transistor Q5, a fourth transistor Q6, a fifth resistor R8 and a sixth resistor R9 for connection and disconnection between the rechargeable battery 10 and the powered unit 40.
According to an embodiment of the present invention, as shown in fig. 5, the first switch module further includes: the first diode D2. Wherein the anode of the first diode D2 is connected to the rechargeable battery 10, and the cathode of the first diode D2 is connected to the powered unit 40.
It should be understood that the first switch module of the embodiment of the present invention may further include a first diode D2 to provide a freewheeling current during the battery switching, so as to avoid power failure of the power supply system due to the battery switching, and effectively improve the reliability of the power supply system.
According to an embodiment of the present invention, as shown in fig. 5, the second voltage sampling module includes: a seventh resistor R6, a fifth transistor Q1, an eighth resistor R1, a sixth transistor Q2, a ninth resistor R3 and a tenth resistor R2. Wherein a first terminal of the seventh resistor R6 is connected to the non-rechargeable battery 20. A control terminal of the fifth transistor Q1 is connected to the control module 60, a first terminal of the fifth transistor Q1 is connected to a second terminal of the seventh resistor R6, and a second terminal of the fifth transistor Q1 is connected to ground. A first end of the eighth resistor R1 is connected to the control end of the fifth transistor Q1, and a second end of the eighth resistor R1 is grounded; a control terminal of the sixth transistor Q2 is connected to the second terminal of the seventh resistor R6, and a first terminal of the sixth transistor Q2 is connected to the first terminal of the seventh resistor R6; a first terminal of the ninth resistor R3 is coupled to the second terminal of the sixth transistor Q2, and a second terminal of the ninth resistor R3 is coupled to the control module 60. A first end of the tenth resistor R2 is connected to a second end of the ninth resistor R3, and a second end of the tenth resistor R2 is grounded.
It should be understood that, as shown in fig. 5, the second voltage sampling module may be composed of a seventh resistor R6, a fifth transistor Q1, an eighth resistor R1, a sixth transistor Q2, a ninth resistor R3 and a tenth resistor R2 for detecting the voltage of the non-rechargeable battery 20.
Specifically, the BAT _ UN _ charge _ ADC _ EN is set high, so that the fifth transistor Q1 is turned on, the fifth transistor Q1 is turned on, the seventh transistor Q3 is turned on, the voltage of the non-rechargeable battery 20 is conducted to the ninth resistor R3, and the voltage V of the non-rechargeable battery 20 is conductedunchargeSampling is enabled such that the divided voltages from the ninth resistor R3 and the tenth resistor R2 are sampled by the control module 60 to obtain the voltage V of the non-rechargeable battery 20unchargeAnd, after the reading, the reading is completed,BAT _ unarger _ ADC _ EN is set low to conserve battery power.
According to an embodiment of the present invention, as shown in fig. 5, the second switch module includes: a seventh transistor Q3, an eighth transistor Q4, an eleventh resistor R4, and a twelfth resistor R5. Wherein, a first terminal of the seventh transistor Q3 is connected with the non-rechargeable battery 20; a first terminal of the eighth transistor Q4 is connected to the second terminal of the seventh transistor Q3, and a second terminal of the eighth transistor Q4 is connected to the supplied power unit 40. A first terminal of the eleventh resistor R4 is connected to the control terminal of the seventh transistor Q3, and a second terminal of the eleventh resistor R4 is connected to the dc power VCC. A first end of the twelfth resistor R5 is connected to the control terminal of the eighth transistor Q4 and the first end of the eleventh resistor R4, respectively, and a second end of the twelfth resistor R5 is connected to the control module 60.
It is understood that the second switching module may be composed of a seventh transistor Q3, an eighth transistor Q4, an eleventh resistor R4 and a twelfth resistor R5 for connection and disconnection between the non-rechargeable battery 20 and the powered unit 40. According to an embodiment of the present invention, as shown in fig. 5, the second switch module further includes: and a second diode D1. Wherein. The anode of the second diode D1 is connected to the non-rechargeable battery 20, and the cathode of the second diode D1 is connected to the powered unit 40.
It should be understood that the second switch module of the embodiment of the present invention may further include a second diode D1, so as to provide a freewheeling current during the battery switching, avoid power failure of the power supply system due to the battery switching, and effectively improve the reliability of the power supply system.
How the power supply system of the embodiment of the present invention operates will be described below in conjunction with a specific embodiment. With reference to fig. 5 and 6, the operation of the power supply system according to the embodiment of the present invention may include the following steps:
step S601, detecting the environmental temperature T through the temperature detection module, and collecting the voltage V of the rechargeable battery through the first voltage sampling modulechargeCollecting the voltage V of the non-rechargeable battery through a second voltage sampling moduleuncharge。
In step S602, it is determined whether the current ambient temperature T is equal to or greater than the first set temperature T0 and less than the second set temperature T1, or whether the ambient temperature T is greater than the fifth set temperature T4 and equal to or less than the sixth set temperature T5, if yes, step S603 is performed, otherwise, step S607 is performed.
Step S603, controlling the charging management module to stop charging the rechargeable battery.
Step S604, judging the voltage V of the non-rechargeable batteryunchargeAnd (4) whether the voltage is larger than the first over-discharge protection voltage threshold V1, if so, executing the step S605, otherwise, executing the step S606.
And step S605, the connection between the non-rechargeable battery and the power supply unit is switched on through the second switch module, the connection between the rechargeable battery and the power supply unit is switched off through the first switch module, and the step S614 is executed in a skipping mode.
And step S606, performing power failure processing on the power supply system, and skipping to execute the step S614.
In step S607, it is determined whether the ambient temperature T is equal to or greater than the second set temperature T1 and equal to or less than the fifth set temperature T4, if so, step S608 is performed, otherwise, step S613 is performed.
In step S608, it is determined whether the ambient temperature T is equal to or greater than the third set temperature T2 and less than or equal to the fourth set temperature T3, if so, step S610 is performed, otherwise, step S609 is performed.
In step S609, the charging management module is controlled to stop charging the rechargeable battery, and the process skips to step S611.
Step S610, controlling the charging management module to charge the rechargeable battery.
Step S611, determining the voltage V of the rechargeable batterychargeIf the second over-discharge protection voltage is greater than the second over-discharge protection voltage threshold V2, if so, the step S612 is executed, otherwise, the step S604 is executed.
Step S612, the connection between the rechargeable battery and the power-supplied unit is switched on through the first switch module, the connection between the non-rechargeable battery and the power-supplied unit is switched off through the second switch module, the charging management module is controlled to charge the rechargeable battery, and the step S614 is skipped.
And step S613, performing power-down processing on the power supply system, and skipping to execute the step S614.
And step S614, ending.
In summary, referring to fig. 5 and fig. 6, the control module 60 according to the embodiment of the invention can read the ambient temperature T detected by the temperature detecting module 50, the voltage of the rechargeable battery 10 collected by the first voltage sampling module, and the voltage of the non-rechargeable battery 20 collected by the second voltage sampling module. Therefore, according to the temperature range of the environment temperature, the first switch module is used for controlling the connection and disconnection between the rechargeable battery 10 and the power supply unit 40, and the second switch module is used for controlling the connection and disconnection between the non-rechargeable battery 20 and the power supply unit 40, so that the safety of the battery is effectively improved, and the reliability of the power supply system is improved.
According to the power supply system provided by the embodiment of the invention, the temperature detection module is used for detecting the ambient temperature, and the control module is used for controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and between the non-rechargeable battery and the power supply unit according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery. Therefore, the rechargeable battery is controlled to work at normal temperature and ambient temperature, the non-rechargeable battery is controlled to work at ultrahigh temperature or ultralow temperature, the power supply system is effectively prevented from being influenced by the ambient temperature, under the condition that the working temperature is allowed, the rechargeable battery is switched to the non-rechargeable battery to continue to supply power before the rechargeable battery is powered off, and the reliability of power supply is effectively improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (13)
1. A power supply system, comprising:
a rechargeable battery;
a non-rechargeable battery;
the switch unit is used for connecting the rechargeable battery and the non-rechargeable battery with a power supply unit respectively;
the power supply unit comprises a temperature detection module and a control module;
the temperature detection module is used for detecting the ambient temperature;
the control module is used for controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and the connection between the non-rechargeable battery and the power supply unit according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery.
2. The power supply system of claim 1, further comprising:
a power source;
the charging management module is used for connecting the power supply with the rechargeable battery;
the control module is further configured to: and controlling the charging management module to charge the rechargeable battery according to the ambient temperature, the voltage of the rechargeable battery and the voltage of the non-rechargeable battery.
3. The power supply system according to claim 2, wherein the switching unit includes:
the rechargeable battery is connected with the powered unit through the first switch module;
and the non-rechargeable battery is connected with the power supply unit through the second switch module.
4. The power supply system of claim 3, further comprising:
the control module acquires the voltage of the rechargeable battery through the first voltage sampling module;
and the control module acquires the voltage of the non-rechargeable battery through the second voltage sampling module.
5. The power supply system of claim 2, wherein the control module is specifically configured to:
if the ambient temperature is equal to or greater than a first set temperature and less than a second set temperature, or the ambient temperature is greater than a fifth set temperature and equal to or less than a sixth set temperature, controlling the charging management module to stop charging the rechargeable battery, and judging whether the voltage of the non-rechargeable battery is greater than a first over-discharge protection voltage threshold, wherein the fifth set temperature is greater than the second set temperature;
if so, controlling the switch unit to switch on the connection between the non-rechargeable battery and the power supply unit and switch off the connection between the rechargeable battery and the power supply unit;
if not, controlling the switch unit to disconnect the connection between the non-rechargeable battery and the power supply unit and the connection between the rechargeable battery and the power supply unit.
6. The power supply system of claim 5, wherein the control module is further configured to:
if the environment temperature is equal to or greater than the second set temperature and equal to or less than the fifth set temperature, judging whether the environment temperature is equal to or greater than a third set temperature and less than or equal to a fourth set temperature, wherein the third set temperature is greater than the second set temperature, and the fourth set temperature is less than the fifth set temperature;
if yes, controlling the charging management module to charge the rechargeable battery; if not, controlling the charging management module to stop charging the rechargeable battery;
judging whether the voltage of the rechargeable battery is greater than a second over-discharge protection voltage threshold value or not;
if the voltage is larger than the second over-discharge protection voltage threshold, controlling the switch unit to switch on the connection between the rechargeable battery and the power supply unit and switch off the connection between the non-rechargeable battery and the power supply unit;
and if the voltage is equal to or less than the second over-discharge protection voltage threshold, returning to the step of judging whether the voltage of the non-rechargeable battery is greater than the first over-discharge protection voltage threshold.
7. The power supply system of claim 5, wherein the control module is further configured to:
and if the environment temperature is lower than the first set temperature or higher than the sixth set temperature, controlling the switch unit to disconnect the connection between the non-rechargeable battery and the power supply unit and the connection between the rechargeable battery and the power supply unit.
8. The power supply system of claim 4, wherein the first voltage sampling module comprises:
a first resistor, a first end of the first resistor being connected to the rechargeable battery;
a control end of the first transistor is connected with the control module, a first end of the first transistor is connected with a second end of the first resistor, and the second end of the first transistor is grounded;
a first end of the second resistor is connected with the control end of the first transistor, and a second end of the second resistor is grounded;
a control end of the second transistor is connected with the second end of the first resistor, and a first end of the second transistor is connected with the first end of the first resistor;
a first end of the third resistor is connected with the second end of the second transistor, and a second end of the third resistor is connected with the control module;
and a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is grounded.
9. The power supply system of claim 3, wherein the first switching module comprises:
a third transistor, a first terminal of which is connected to the rechargeable battery;
a fourth transistor, a first terminal of the fourth transistor being connected to a second terminal of the third transistor, a second terminal of the fourth transistor being connected to the power-supplied unit;
a first end of the fifth resistor is connected with the control end of the third transistor, and a second end of the fifth resistor is connected with a direct current power supply;
and a first end of the sixth resistor is respectively connected with the control end of the fourth transistor and the first end of the fifth resistor, and a second end of the sixth resistor is connected with the control module.
10. The power supply system of claim 9, wherein the first switch module further comprises:
a first diode having an anode connected to the rechargeable battery and a cathode connected to the powered unit.
11. The power supply system of claim 4, wherein the second voltage sampling module comprises:
a seventh resistor, a first end of the seventh resistor being connected to the non-rechargeable battery;
a control end of the fifth transistor is connected with the control module, a first end of the fifth transistor is connected with a second end of the seventh resistor, and a second end of the fifth transistor is grounded;
a first end of the eighth resistor is connected with the control end of the fifth transistor, and a second end of the eighth resistor is grounded;
a control end of the sixth transistor is connected with the second end of the seventh resistor, and a first end of the sixth transistor is connected with the first end of the seventh resistor;
a ninth resistor, a first end of the ninth resistor being connected to the second end of the sixth transistor, and a second end of the ninth resistor being connected to the control module;
a tenth resistor, a first end of the tenth resistor being connected to the second end of the ninth resistor, and a second end of the tenth resistor being grounded.
12. The power supply system of claim 3, wherein the second switch module comprises:
a seventh transistor, a first terminal of which is connected to the non-rechargeable battery;
a seventh transistor, a first terminal of which is connected to the second terminal of the sixth transistor, and a second terminal of which is connected to the power supply unit;
a first end of the eleventh resistor is connected with the control end of the seventh transistor, and a second end of the eleventh resistor is connected with a direct current power supply;
and a first end of the twelfth resistor is respectively connected with the control end of the eighth transistor and the first end of the eleventh resistor, and a second end of the twelfth resistor is connected with the control module.
13. The power supply system of claim 12, wherein the second switch module further comprises:
a second diode having an anode connected to the non-rechargeable battery and a cathode connected to the powered unit.
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| US20140084848A1 (en) * | 2012-09-26 | 2014-03-27 | Energy Pass Incorporation | Temperature-Controlled Power Supply System and Method |
| CN107623346A (en) * | 2017-08-23 | 2018-01-23 | 江铃汽车股份有限公司 | Battery charging, charge/discharge control circuit |
| CN108684008A (en) * | 2018-05-15 | 2018-10-19 | 北京国科舰航传感技术有限公司 | Wireless sensor, wireless sensing system and wireless sensing method |
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| CN102479983A (en) * | 2010-11-30 | 2012-05-30 | 比亚迪股份有限公司 | Charging control method and device for electric vehicle power battery |
| US20140084848A1 (en) * | 2012-09-26 | 2014-03-27 | Energy Pass Incorporation | Temperature-Controlled Power Supply System and Method |
| CN107623346A (en) * | 2017-08-23 | 2018-01-23 | 江铃汽车股份有限公司 | Battery charging, charge/discharge control circuit |
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