CN111030239B - Over-temperature protection charging management circuit, method and device and electronic equipment - Google Patents
Over-temperature protection charging management circuit, method and device and electronic equipment Download PDFInfo
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- CN111030239B CN111030239B CN201911361216.XA CN201911361216A CN111030239B CN 111030239 B CN111030239 B CN 111030239B CN 201911361216 A CN201911361216 A CN 201911361216A CN 111030239 B CN111030239 B CN 111030239B
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- 238000000034 method Methods 0.000 title claims description 14
- 238000007726 management method Methods 0.000 claims abstract description 108
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000007599 discharging Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
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Classifications
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
Abstract
The invention discloses an over-temperature protection charging management circuit, which comprises: the charging management unit, the target current detection unit, the discharging current detection unit and the current distribution control circuit; the charging management unit outputs target current to a load and a battery; the target current detection unit detects the magnitude of the target current; the discharge current detection unit detects the magnitude of the discharge current of the battery; when the current distribution control circuit receives an over-temperature protection signal, judging whether the working current of the load is smaller than the target current according to a discharge current signal and a target current signal; and when the working current is smaller than the target current, controlling the charging management unit to reduce the target current. The invention also provides an over-temperature protection charging management method, an over-temperature protection charging management device and electronic equipment, so that the target current is only provided for a load and is not provided for a battery, and the service time of the whole machine is prolonged.
Description
Technical Field
The present invention relates to the field of over-temperature protection charging management, and in particular, to an over-temperature protection charging management method, circuit, device, and electronic apparatus.
Background
At present, rechargeable battery power supply products in the market can be charged and over-temperature protection can occur when the battery is charged and discharged, the whole machine works to easily consume the electric quantity of the battery to shut down, and bad experience is brought to users. The charging circuit with path power management has the advantages that the peak power of load work exceeds the bearing capacity of the USB, the voltage of the USB and the voltage of the battery are in a certain gap, the load can possibly pull the USB dead, and the simultaneous power supply of the USB and the battery cannot be met.
Disclosure of Invention
The invention mainly aims to provide an over-temperature protection charging management circuit, which aims to solve the technical problem that the whole machine works to deplete the electric quantity of a battery and shut down the battery during charging over-temperature protection.
To achieve the above object, the present invention provides an over-temperature protection charge management circuit, the circuit comprising: the charging management unit, the target current detection unit, the discharging current detection unit and the current distribution control circuit; wherein,
the charging management unit is used for outputting target current to a load and a battery;
the target current detection unit is used for detecting the magnitude of the target current, generating a target current signal and outputting the target current signal to the current distribution control circuit;
the discharging current detection unit is used for detecting the discharging current of the battery, generating a discharging current signal and outputting the discharging current signal to the current distribution control circuit;
the current distribution control circuit is used for judging whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal when the over-temperature protection signal is received;
and when the working current is smaller than the target current, controlling the charging management unit to reduce the target current.
Preferably, the input end of the charging management unit is connected with the charging interface, the output end of the charging management unit is connected with the input end of the target current detection unit, the output end of the target current detection unit is connected with the input end of the load, the first input end of the current distribution control circuit and the output end of the discharging current detection unit, the input end of the discharging current detection unit is connected with the second input end of the current distribution control circuit and the output end of the battery, the third input end of the current distribution control circuit is used for receiving an over-temperature protection signal, and the control end of the current distribution control circuit is connected with the controlled end of the charging management unit.
Preferably, the current distribution control circuit further includes: a level conversion circuit and a comparison circuit; wherein,
the comparison circuit is used for receiving the discharge current signal and the target current signal, comparing whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal, and sending a current distribution control signal to the level conversion circuit when the working current is smaller than the target current;
the level conversion circuit is used for receiving the over-temperature protection signal, converting the over-temperature protection signal and the current distribution control signal to obtain a target current control signal, and outputting the target current control signal to the charging management unit to reduce the target current.
Preferably, the level conversion circuit is further configured to trigger the comparison circuit to start working when receiving the over-temperature protection signal.
Preferably, the comparing circuit is further configured to receive the discharge current signal and an operating current signal of a load, and compare whether the operating current of the load is smaller than the target current according to the discharge current signal and the operating current signal, and send a current distribution control signal to the level converting circuit when the operating current is smaller than the target current.
Preferably, the charging management unit is further configured to receive the target current control signal sent by the level conversion circuit, and reduce the target current to the operating current, so that the target current is only supplied to the load.
In addition, in order to achieve the above object, the present invention further provides an over-temperature protection charging management method, which includes:
the charging management unit outputs a target current to the load and the battery;
a target current detection unit detects the magnitude of the target current, generates a target current signal and outputs the target current signal to the current distribution control circuit;
the discharging current detecting unit detects the discharging current of the battery, generates a discharging current signal and outputs the discharging current signal to the current distribution control circuit;
when receiving an over-temperature protection signal, the current distribution control circuit judges whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal;
and when the working current is smaller than the target current, controlling the charging management unit to reduce the target current.
Preferably, when the operating current is smaller than the target current, the step of controlling the charge management unit to reduce the target current specifically includes:
the charge management unit reduces the target current to the operating current so that the target current is supplied only to the load.
In addition, in order to achieve the above object, the present invention also provides an over-temperature protection charge management device, which includes the over-temperature protection charge management circuit as described above, or which applies the over-temperature protection charge management method as described above.
In addition, in order to achieve the above object, the present invention also provides an electronic device including the above-described over-temperature protection charge management circuit, or the electronic device applying the above-described over-temperature protection charge management method.
The invention provides an over-temperature protection charging management circuit, which comprises: the charging management unit, the target current detection unit, the discharging current detection unit and the current distribution control circuit; the charging management unit is used for outputting target current to a load and a battery; the target current detection unit is used for detecting the magnitude of the target current, generating a target current signal and outputting the target current signal to the current distribution control circuit; the discharging current detection unit is used for detecting the discharging current of the battery, generating a discharging current signal and outputting the discharging current signal to the current distribution control circuit; the current distribution control circuit is used for judging whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal when the over-temperature protection signal is received; and when the working current is smaller than the target current, controlling the charging management unit to reduce the target current. By arranging the circuit, the target current is only supplied to the load and is not supplied to the battery, so that the service time of the whole machine is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of a first embodiment of an over-temperature protection charge management circuit according to the present invention;
FIG. 2 is a schematic circuit diagram of a first embodiment of an over-temperature protection charge management circuit according to the present invention;
FIG. 3 is a schematic diagram of a functional module of a second embodiment of the over-temperature protection charging management circuit according to the present invention;
FIG. 4 is a schematic circuit diagram of a second embodiment of the over-temperature protection charge management circuit according to the present invention;
FIG. 5 is a flowchart illustrating a first embodiment of an over-temperature protection charging management method according to the present invention;
fig. 6 is a flowchart illustrating a second embodiment of an over-temperature protection charging management method according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Charging management unit | U1A | Comparator with a comparator circuit |
| 200 | Target current detection unit | R1～R7 | First to seventh resistors |
| 300 | Discharge current detection unit | Q1～Q2 | First to second triodes |
| 400 | Current distribution control circuit | 401 | Comparison circuit |
| 500 | Load(s) | 402 | Level conversion circuit |
| 600 | Battery cell | USB | Charging interface |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present invention.
Referring to fig. 1 and 2, the present invention proposes an over-temperature protection charging management circuit, the circuit comprising: charging management unit 100, target current detection unit 200, discharge current detection unit 300, and current distribution control circuit 400; wherein:
the input end of the charge management unit 100 is connected with the charge interface USB, the output end of the charge management unit 100 is connected with the input end of the target current detection unit 200, the output end of the target current detection unit 200 is connected with the input end of the load 500, the first input end of the current distribution control circuit 400 and the output end of the discharge current detection unit 300, the input end of the discharge current detection unit 300 is connected with the second input end of the current distribution control circuit 400 and the output end of the battery 600, the third input end of the current distribution control circuit 400 is used for receiving an over-temperature protection signal, and the control end of the current distribution control circuit 400 is connected with the controlled end of the charge management unit 100.
The charge management unit 100 is configured to output a target current I1 to the load 500 and the battery 600;
it is easy to understand that the charge management unit 100 may convert the electric energy inputted from the charge interface USB into a current suitable for the electronic device, and supply the target current I1 to the load 500 to charge the battery 600. The charge management unit 100 can adjust the target current I1 according to the current circuit condition. This causes the battery 600 to be charged and discharged, and when the operating temperature of the battery 600 is too high, overcharge protection occurs.
It is easy to understand that, when the load 500 is operated, if the current I3 required by the present load is larger than the target current I1, the current is transmitted to the load 500 together with the battery 600 and the charge management unit 100; when the power required by the load 500 is small, the load 500 may be individually supplied with power by the charge management unit 100, and the battery 600 may be charged with surplus power. However, in an over-temperature condition, the battery 600 will lose the service life of the battery 600 when continuously charged and discharged, and the target current I1 needs to be controlled to be reduced to prevent battery loss caused by continuous charging.
The charge management unit 100 is further configured to receive the target current control signal sent by the level conversion circuit 402, and reduce the target current I1 to the operating current I3 so that the target current I1 is only supplied to the load 500.
The target current detecting unit 200 is configured to detect the magnitude of the target current I1, generate a target current signal, and output the target current signal to the current distribution control circuit 400;
in this embodiment, the target current detection unit 200 is a first resistor R1, a first end of the first resistor R1 is connected to the output end of the charge management unit 100, and a second end of the first resistor R1 is connected to the first ends of the load 500 and the discharge current detection unit 300, and a first input end of the current distribution control circuit 400.
The discharging current detecting unit 300 is configured to detect the magnitude of the discharging current I2 of the battery, generate a discharging current signal, and output the discharging current signal to the current distribution control circuit 400.
In this embodiment, the discharge current detection unit 300 is a second resistor R2, a first end of the second resistor R2 is connected to the first end of the first resistor R1, the load 500, and a first input end of the current distribution control circuit 400, and a second end of the second resistor R2 is connected to the battery 600 and a second input end of the current distribution control circuit 400.
The current distribution control circuit 400 is configured to determine, when receiving the over-temperature protection signal, whether the working current I3 of the load is smaller than the target current I1 according to the discharge current signal and the target current signal. The current distribution control circuit 400 further includes: a level conversion circuit 402 and a comparison circuit 401; wherein:
the comparison circuit 401 is configured to receive the discharge current signal and the target current signal, compare whether an operating current I3 of the load is smaller than the target current according to the discharge current signal and the target current signal, and send a current distribution control signal to the level conversion circuit 402 when the operating current I3 is smaller than the target current I1.
The comparison circuit 401 includes: the seventh resistor R7, the sixth resistor R6 and the comparator U1A may also be replaced by an operational amplifier, and the type of the device is not limited herein, so long as the corresponding function can be completed, which is within the scope of the present invention. The second end of the seventh resistor R7 is connected to the output end of the battery 600 and the second end of the second resistor R2, the first end of the seventh resistor R7 is connected to the first end of the sixth resistor R6 and the opposite end of the comparator U1A, and the second end of the sixth resistor R6 is connected to the level conversion circuit 402 and the battery 600. The non-inverting terminal of the comparator U1A is connected to the first terminal of the second resistor R2, the second terminal of the first resistor R1, and the input terminal of the load 500.
The level conversion circuit 402 is configured to receive an over-temperature protection signal, convert the over-temperature protection signal and the current distribution control signal to obtain a target current control signal, and output the target current control signal to the charge management unit 100 to reduce the target current I1.
The level conversion circuit includes: the third resistor R3, the fourth resistor R4, the fifth resistor R5, the first triode Q1 and the second triode Q2. The first end of the third resistor R3 is connected to the controlled end of the charge management unit 100 and the first end of the fourth resistor R4, the second end of the third resistor R3 is connected to the first end of the first resistor R1, the second end of the fourth resistor R4 is connected to the collector of the first triode Q1, the emitter of the first triode Q1 is connected to the emitter of the second triode Q2 and the second end of the sixth resistor R6, the base of the first triode Q1 is connected to the first end of the fifth resistor R5 and the collector of the second triode Q2, and the base of the second triode Q2 is used for receiving an over-temperature protection signal; the second end of the fifth resistor R5 is connected with the output end of the comparator U1A.
The level shift circuit 402 is further configured to trigger the comparison circuit 401 to start operating when receiving an over-temperature protection signal.
In the level shift circuit 402, the third resistor R3 and the fourth resistor R4 form a bias of the target current I1, the first transistor Q1 is used for controlling the target current I1, and the second transistor Q2 is used for transmitting the over-temperature protection signal. In the comparison circuit 401, the seventh resistor R7 and the sixth resistor R6 are biased by the discharge current I2.
When the over-temperature protection signal is not received, the second transistor Q2 is turned on, the first transistor Q1 is turned off, and the current distribution control circuit 400 is not activated, i.e., does not start to operate. When the over-temperature protection signal is received, the second triode Q2 is turned off, and if the required working current I3 of the load 500 is greater than the target current I1 at this time, the discharge current I2 and the target current I1 jointly supply power to the load 500. If the required operating current I3 of 500 is less than or equal to the target current I1, the discharge current I2 approaches zero. At this time, the bias voltage formed by the seventh resistor R7 and the sixth resistor R6 and the voltage on the second resistor R2 make the same-phase end of the comparator U1A larger than the opposite-phase end, and the comparator U1A outputs a high level to make the first triode Q1 turned on, and the charging management unit 100 receives the target current control signal because the third resistor R3 and the fourth resistor R4 form the bias, so that the target current I1 is controlled to be reduced.
The circuit of this embodiment enables the charging circuit to realize closed-loop control, and ensures that when the battery exceeds the charging stability, the charging management unit 100 only supplies current to the load 500 and not to the battery 600, thereby ensuring the service life of the battery, and prolonging the service life of the battery under the condition that the charging is stopped.
Referring to fig. 3 and 4, a second embodiment of the over-temperature protection charge management circuit of the present invention is presented based on the first embodiment of the over-temperature protection charge management circuit of the present invention.
It should be noted that, if the charge management unit 100 has an independent target current control pin, the target current control pin of the charge management unit 100 may be directly controlled by the current distribution control circuit 400. At this time, the target current detecting unit 200 may not be used in the circuit, the present embodiment is modified based on the circuit of the first embodiment, the level converting circuit 402 is adaptively modified, and the corresponding function is performed as in the first embodiment, which is not limited thereto.
The comparison circuit 401 is further configured to receive the discharge current signal and an operating current signal of a load, and compare whether an operating current I3 of the load is smaller than the target current I1 according to the discharge current signal and the operating current signal, and send a current distribution control signal to the level conversion circuit 402 when the operating current I3 is smaller than the target current I1.
It is easy to understand that the non-inverting terminal of the comparator U1A is connected to the input terminal of the load 500, and the input terminal of the comparator U1A may sample the working current signal of the load 500, and the working current signal and the voltage on the bias second resistor R2 formed by the seventh resistor R7 and the sixth resistor R6 received by the inverting terminal thereof. Such that the non-inverting terminal is larger than the inverting terminal, comparator U1A outputs a high level to the level shifter circuit 402.
The circuit of this embodiment enables the charging circuit to realize closed-loop control, and ensures that when the battery exceeds the charging stability, the charging management unit 100 only supplies current to the load 500 and not to the battery 600, thereby ensuring the service life of the battery, and prolonging the service life of the battery under the condition that the charging is stopped. The original device is utilized, the arrangement of the circuit is simplified, the wiring of the circuit is easier, and the user experience is optimized.
Based on the circuit of the first embodiment of the over-temperature protection charging management circuit, the invention also provides an over-temperature protection charging management method, as shown in fig. 5, the method comprises the following steps:
step S100: the charge management unit 100 outputs a target current I1 to the load 500 and the battery 600.
It is easy to understand that the charge management unit 100 may convert the electric energy inputted from the charge interface USB into a current suitable for the electronic device, and supply the target current I1 to the load 500 to charge the battery 600. The charge management unit 100 can adjust the target current I1 according to the current circuit condition. This causes the battery 600 to be charged and discharged, and when the operating temperature of the battery 600 is too high, overcharge protection occurs.
It is easy to understand that, when the load 500 is operated, if the current I3 required by the present load is larger than the target current I1, the current is transmitted to the load 500 together with the battery 600 and the charge management unit 100; when the power required by the load 500 is small, the load 500 may be individually supplied with power by the charge management unit 100, and the battery 600 may be charged with surplus power. However, in an over-temperature condition, the battery 600 will lose the service life of the battery 600 when continuously charged and discharged, and the target current I1 needs to be controlled to be reduced to prevent battery loss caused by continuous charging.
Step S200: the target current detection unit 200 detects the magnitude of the target current I1, generates a target current signal, and outputs the target current signal to the current distribution control circuit 400; the discharge current detection unit 300 detects the magnitude of the discharge current I2 of the battery 600, generates a discharge current signal, and outputs the discharge current signal to the current distribution control circuit 400.
Step S300: when receiving the over-temperature protection signal, the current distribution control circuit 400 determines whether the working current I3 of the load 500 is smaller than the target current I1 according to the discharge current signal and the target current signal.
It should be noted that, when the circuit distribution control circuit 400 receives the over-temperature protection signal, it can be triggered to be turned on, so as to perform the function of circuit distribution control.
Step S400: when the operating current I3 is smaller than the target current I1, the charge management unit 100 is controlled to decrease the target current I1.
The charge management unit 100 controls the target current I1 to decrease so that the target current I1 is not supplied to the battery 600.
The method of the embodiment enables the charging circuit to realize closed-loop control, ensures that when the battery exceeds the charging stability, the charging management unit 100 only supplies current to the load 500 and not to the battery 600, ensures the service life of the battery, and prolongs the service life of the battery under the condition that the charging is stopped.
Based on the circuit of the second embodiment of the over-temperature protection charging management circuit of the present invention, the present invention further provides an over-temperature protection charging management method, as shown in fig. 6, according to the second embodiment of the present invention, the step S100 includes:
step S201: the discharge current detection unit 100 detects the magnitude of the discharge current I2 of the battery 600, generates a discharge current signal, and outputs the discharge current signal to the current distribution control circuit 400.
It should be noted that, if the charge management unit 100 has an independent target current control pin, the target current control pin of the charge management unit 100 may be directly controlled by the current distribution control circuit 400. The target current detection unit 200 may not be used in the circuit at this time.
Step S301: upon receiving the over-temperature protection signal, the current distribution control circuit 400 compares whether the operating current I3 of the load 500 is smaller than the target current I1 according to the discharge current signal and the operating current signal.
It is easy to understand that the non-inverting terminal of the comparator U1A is connected to the input terminal of the load 500, and the input terminal of the comparator U1A may sample the working current signal of the load 500, and the working current signal and the voltage on the bias second resistor R2 formed by the seventh resistor R7 and the sixth resistor R6 received by the inverting terminal thereof. Such that the non-inverting terminal is larger than the inverting terminal, comparator U1A outputs a high level to the level shifter circuit 402.
It is easy to understand that step S400 is still performed after step S301 to complete the reduction of the target current I1 so that the battery 600 is not charged.
The circuit of this embodiment enables the charging circuit to realize closed-loop control, and ensures that when the battery exceeds the charging stability, the charging management unit 100 only supplies current to the load 500 and not to the battery 600, thereby ensuring the service life of the battery, and prolonging the service life of the battery under the condition that the charging is stopped. The original device is utilized, the arrangement of the circuit is simplified, the wiring of the circuit is easier, and the user experience is optimized.
The invention also provides an over-temperature protection charge management device which comprises the over-temperature protection charge management circuit or applies the over-temperature protection charge management method. Because the device adopts all the technical schemes of all the embodiments, the device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.
The invention also provides electronic equipment, which comprises the over-temperature protection charging management circuit or applies the over-temperature protection charging management method. The electronic device adopts all the technical schemes of all the embodiments, so that the electronic device has at least all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. An over-temperature protection charge management circuit, the circuit comprising: the charging management unit, the target current detection unit, the discharging current detection unit and the current distribution control circuit; wherein,
the charging management unit is used for outputting target current to a load and a battery;
the target current detection unit is used for detecting the magnitude of the target current, generating a target current signal and outputting the target current signal to the current distribution control circuit;
the discharging current detection unit is used for detecting the discharging current of the battery, generating a discharging current signal and outputting the discharging current signal to the current distribution control circuit;
the current distribution control circuit is used for judging whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal when the over-temperature protection signal is received;
when the working current is smaller than the target current, controlling the charging management unit to reduce the target current;
the charging management unit is also used for adjusting the target current according to the current circuit condition;
the input end of the charging management unit is connected with the charging interface, the output end of the charging management unit is connected with the input end of the target current detection unit, the output end of the target current detection unit is connected with the input end of the load, the first input end of the current distribution control circuit and the output end of the discharging current detection unit, the input end of the discharging current detection unit is connected with the second input end of the current distribution control circuit and the output end of the battery, the third input end of the current distribution control circuit is used for receiving an over-temperature protection signal, and the control end of the current distribution control circuit is connected with the controlled end of the charging management unit.
2. The over-temperature protection charge management circuit of claim 1, wherein the current distribution control circuit further comprises: a level conversion circuit and a comparison circuit; wherein,
the comparison circuit is used for receiving the discharge current signal and the target current signal, comparing whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal, and sending a current distribution control signal to the level conversion circuit when the working current is smaller than the target current;
the level conversion circuit is used for receiving the over-temperature protection signal, converting the over-temperature protection signal and the current distribution control signal to obtain a target current control signal, and outputting the target current control signal to the charging management unit to reduce the target current.
3. The over-temperature protection charge management circuit of claim 2, wherein the level shifter circuit is further configured to trigger the comparator circuit to start operating when receiving the over-temperature protection signal.
4. The over-temperature protection charge management circuit of claim 2, wherein the comparison circuit is further configured to receive the discharge current signal and an operating current signal of a load, and compare whether the operating current of the load is less than the target current according to the discharge current signal and the operating current signal, and send a current distribution control signal to the level shift circuit when the operating current is less than the target current.
5. The over-temperature protection charge management circuit according to claim 2, wherein the charge management unit is further configured to receive the target current control signal sent by the level shift circuit, and reduce the target current to the operating current so that the target current is supplied only to the load.
6. An over-temperature protection charge management method applied to the over-temperature protection charge management circuit of claim 1, the method comprising:
the charging management unit outputs a target current to the load and the battery;
a target current detection unit detects the magnitude of the target current, generates a target current signal and outputs the target current signal to the current distribution control circuit;
the discharging current detecting unit detects the discharging current of the battery, generates a discharging current signal and outputs the discharging current signal to the current distribution control circuit;
when receiving an over-temperature protection signal, the current distribution control circuit judges whether the working current of the load is smaller than the target current according to the discharge current signal and the target current signal;
and when the working current is smaller than the target current, controlling the charging management unit to reduce the target current.
7. The over-temperature protection charge management method according to claim 6, wherein the step of controlling the charge management unit to reduce the target current when the operating current is smaller than the target current specifically comprises:
the charge management unit reduces the target current to the operating current so that the target current is supplied only to the load.
8. An over-temperature protection charge management device, characterized in that the device comprises an over-temperature protection charge management circuit according to any one of claims 1 to 5, or the device applies an over-temperature protection charge management method according to any one of claims 6 to 7.
9. An electronic device, characterized in that the electronic device comprises an over-temperature protection charge management circuit according to any one of claims 1-5, or the electronic device applies an over-temperature protection charge management method according to any one of claims 6-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911361216.XA CN111030239B (en) | 2019-12-24 | 2019-12-24 | Over-temperature protection charging management circuit, method and device and electronic equipment |
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| US6462515B1 (en) * | 2000-03-15 | 2002-10-08 | Mitsubishi Denki Kabushiki Kaisha | Cell protective circuit |
| CN102457086A (en) * | 2010-10-29 | 2012-05-16 | 凹凸电子（武汉）有限公司 | Power topology with battery charging and discharge current protection capabilities |
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| CN206908378U (en) * | 2017-07-07 | 2018-01-19 | 山东汉格威智能技术有限公司 | One kind power-off automatic switchover battery circuit |
| CN107783563A (en) * | 2016-08-30 | 2018-03-09 | 中兴通讯股份有限公司 | A kind of terminal and the method for controlling terminal temperature |
| CN108124497A (en) * | 2015-09-17 | 2018-06-05 | 高通股份有限公司 | For the system and method to charge to battery |
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| US6462515B1 (en) * | 2000-03-15 | 2002-10-08 | Mitsubishi Denki Kabushiki Kaisha | Cell protective circuit |
| CN102457086A (en) * | 2010-10-29 | 2012-05-16 | 凹凸电子（武汉）有限公司 | Power topology with battery charging and discharge current protection capabilities |
| CN108124497A (en) * | 2015-09-17 | 2018-06-05 | 高通股份有限公司 | For the system and method to charge to battery |
| CN105634060A (en) * | 2016-01-27 | 2016-06-01 | 深圳市思远半导体有限公司 | Charge-discharge system and charge-discharge method for mobile power supply |
| CN107783563A (en) * | 2016-08-30 | 2018-03-09 | 中兴通讯股份有限公司 | A kind of terminal and the method for controlling terminal temperature |
| CN206908378U (en) * | 2017-07-07 | 2018-01-19 | 山东汉格威智能技术有限公司 | One kind power-off automatic switchover battery circuit |
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| CN111030239A (en) | 2020-04-17 |
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