CN115483726A - Battery system and power saving method of battery system - Google Patents
Battery system and power saving method of battery system Download PDFInfo
- Publication number
- CN115483726A CN115483726A CN202110668142.5A CN202110668142A CN115483726A CN 115483726 A CN115483726 A CN 115483726A CN 202110668142 A CN202110668142 A CN 202110668142A CN 115483726 A CN115483726 A CN 115483726A
- Authority
- CN
- China
- Prior art keywords
- battery
- power supply
- circuit
- protection circuit
- load detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses battery system and power saving method of battery system, this battery system includes: the battery protection circuit comprises a battery, a load detection circuit, a battery protection circuit and a switch circuit, wherein the load detection circuit is connected with the battery and used for generating a first power supply signal after detecting that the battery is connected with external electronic equipment; the battery protection circuit is connected with the load detection circuit and used for being in a working state after receiving the first power supply signal and generating a power supply control signal; the switch circuit is connected with the battery protection circuit and the battery and used for conducting a path between the battery and the battery protection circuit after receiving the power supply control signal so as to enable the load detection circuit to be in short circuit. By means of the mode, the circuit structure can be simplified, and the whole size is reduced.
Description
Technical Field
The present disclosure relates to battery technologies, and in particular, to a battery system and a power saving method for the battery system.
Background
In the use process of the battery, the battery protection circuit is always in a working state, and the service life of the battery is influenced while the electric quantity of the battery is consumed. Therefore, a power supply for controlling and turning off the battery protection circuit when the battery is idle is needed, however, in the existing product, a dedicated control pin of the battery protection circuit is mostly connected with the control circuit, and whether the battery protection circuit works is controlled through the control pin, so that the circuit occupies more pin resources, and the circuit structure has a complex structure, occupies a large space, and has a high manufacturing cost.
Disclosure of Invention
In view of the above, the present disclosure provides a battery system and a power saving method for the battery system, which can simplify a circuit structure and reduce an overall size.
In order to solve the technical problem, the application adopts a technical scheme that: provided is a battery system including: the device comprises a battery, a load detection circuit, a battery protection circuit and a switch circuit; the load detection circuit is connected with the battery and used for generating a first power supply signal after detecting that the battery is connected with the external electronic equipment; the battery protection circuit is connected with the load detection circuit and used for being in a working state after receiving the first power supply signal and generating a power supply control signal; the switch circuit is connected with the battery protection circuit and the battery and used for conducting a path between the battery and the battery protection circuit after receiving the power supply control signal so as to enable the load detection circuit to be in a short circuit.
In an embodiment of the application, when the battery is not connected to the external electronic device, the load detection circuit stops outputting the first power supply signal, the battery protection circuit is in a non-operating state, and the switch circuit is in an off state.
In an embodiment of the present application, the battery includes a battery cell and a power supply terminal, where the battery cell is configured to generate a power signal, and the power supply terminal is configured to connect to an external electronic device to supply power to the external electronic device.
In an embodiment of the application, the power supply end includes a first power supply end and a second power supply end, the load detection circuit is connected with the first power supply end and the battery cell, and is configured to detect a resistance value of an external electronic device disposed between the first power supply end and the second power supply end, and generate a first power supply signal when the resistance value of the external electronic device is smaller than a first preset value.
In an embodiment of the present application, the load detection circuit includes a first resistor, a second resistor, and a first switch tube, wherein one end of the first resistor is connected to the first power supply end; one end of the second resistor is connected with the other end of the first resistor, and the other end of the second resistor is connected with the output end of the battery cell; the first end of the first switch tube is connected with the output end of the battery core, the second end of the first switch tube is connected with the other end of the first resistor, and the third end of the first switch tube is connected with the battery protection circuit.
In an embodiment of the application, when the resistance value of the external electronic device is smaller than a first preset value, the first switching tube is turned on to turn on a path between the battery protection circuit and the output end of the battery cell; when the resistance value of the external electronic device is greater than a first preset value, the first switch tube is cut off to close a path between the battery protection circuit and the output end of the battery cell, wherein the first preset value is related to the resistance value of the first resistor, the resistance value of the second resistor, the threshold voltage of the first switch tube and the power supply voltage of the battery.
In an embodiment of the application, the first preset value is greater than a resistance value of an input impedance of the external electronic device when the power supply terminal is connected with the external electronic device; the switch circuit comprises a second switch tube, and the second switch tube is connected with the control end of the battery protection circuit, the first power supply end and the output end of the battery core.
In an embodiment of the application, the battery system further includes a coupling circuit, where the coupling circuit is connected to the switch circuit and the power supply terminal of the battery protection circuit, and is configured to process the power supply signal output by the battery, generate a second power supply signal, short-circuit the load detection circuit, and input the second power supply signal to the power supply terminal of the battery protection circuit to supply power to the battery protection circuit.
In an embodiment of the application, the battery system further includes a unidirectional conducting circuit, and the unidirectional conducting circuit is connected to the battery protection circuit and the load detection circuit, and is configured to control the first power supply signal to flow from the load detection circuit to the battery protection circuit.
In order to solve the above technical problem, the present application adopts another technical solution: there is provided a power saving method of a battery system, the method being applied to the battery system described in any of the above embodiments, the battery system comprising: the battery, load detection circuit, battery protection circuit and switching circuit, this method includes: generating a first power supply signal after detecting that the battery is connected with the external electronic equipment by using a load detection circuit; the battery protection circuit is in a working state after receiving the first power supply signal, and a power supply control signal is generated; after the switch circuit receives the power supply control signal, the switch circuit is used for conducting a path between the battery and the battery protection circuit so as to enable the load detection circuit to be in short circuit.
Through the scheme, the beneficial effects of the application are that: the battery system comprises a battery, a load detection circuit, a battery protection circuit and a switch circuit, wherein the load detection circuit is connected with the battery and can detect whether the battery is connected with external electronic equipment or not, a first power supply signal is generated when the battery is connected with the external electronic equipment and is input to the battery protection circuit, so that the battery protection circuit is in a working state, the battery protection circuit can generate a power supply control signal and input the power supply control signal to the switch circuit, the switch circuit conducts a path between the battery and the battery protection circuit after receiving the power supply control signal, the load detection circuit is in a short circuit, and the battery can supply power to the battery protection circuit; whether the battery is connected with the external electronic equipment or not is detected by utilizing the load detection circuit, and the power is timely supplied to the battery protection circuit when the battery is connected with the external electronic equipment, so that the battery protection circuit works normally, namely whether the battery is connected with the external electronic equipment or not is controlled, and the battery protection circuit is in a working state only when the battery system is connected with the external electronic equipment, so that the power consumption is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. Moreover, the drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Fig. 1 is a schematic structural diagram of a first embodiment of a battery system provided herein;
fig. 2 is a schematic structural diagram of a second embodiment of a battery system provided herein;
FIG. 3 is a schematic diagram of the load detection circuit in the embodiment shown in FIG. 2;
FIG. 4 is a schematic diagram of the battery protection circuit of the embodiment shown in FIG. 2;
fig. 5 is a flowchart illustrating a power saving method of a battery system according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
In order to solve the technical problems of more pin resources occupied by a battery system, complex circuit structure and high manufacturing cost in the prior art, the application provides a battery system and a power saving method of the battery system, a load detection circuit is utilized to detect whether a battery is connected with external electronic equipment, a first power supply signal is generated when the battery is connected with the external electronic equipment and is input to a battery protection circuit, so that the battery protection circuit is in a working state, the battery protection circuit generates a power supply control signal after receiving the first power supply signal and inputs the power supply control signal to a switch circuit, the switch circuit is used for switching on/off a path between the battery and the battery protection circuit so as to control whether the battery supplies power for the battery protection circuit, the load detection circuit is used for replacing circuit structures such as a control circuit in the prior art, the structure of the whole circuit can be simplified, and the whole volume of the battery system is favorably reduced; and whether detect the battery by load detection circuit and be connected with external electronic equipment, can automatic output first power supply signal, whether can connect external electronic equipment control battery protection circuit through the battery system and work to only battery protection circuit just is in operating condition when external electronic equipment is connected to the battery system, realizes saving the electric quantity, will explain the technical scheme of this application in detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery system according to a first embodiment of the present disclosure, where the battery system includes a battery 11, a load detection circuit 12, a battery protection circuit 13, and a switch circuit 14.
The battery 11 is used to store and discharge electric energy, and when the battery 11 is connected to the external electronic device 20, the battery 11 outputs the stored electric energy to the external electronic device 20 to supply power to the external electronic device 20.
The load detection circuit 12 is connected to the battery 11, and is configured to generate a first power supply signal after detecting that the battery 11 is connected to the external electronic device 20.
The battery protection circuit 13 is connected to the load detection circuit 12, and is configured to be in an operating state after receiving the first power supply signal, generate a power supply control signal, and protect the battery 11.
The switch circuit 14 is connected to the battery 11 and the battery protection circuit 13, and is configured to, after receiving the power supply control signal, turn on a path between the battery 11 and the battery protection circuit 13 to short-circuit the load detection circuit 12, thereby enabling power supply to the battery protection circuit 13.
Further, the load detection circuit 12 can detect whether the battery 11 is connected to the external electronic device 20, after detecting that the battery 11 is connected to the external electronic device 20, a first power supply signal is generated and input to the battery protection circuit 13, the first power supply signal is used for controlling the battery protection circuit 13 to operate, the battery protection circuit 13 is in an operating state after receiving the first power supply signal, and a power supply control signal is generated, the switch circuit 14 receives the power supply control signal and then conducts a path between the battery 11 and the battery protection circuit 13, so that the battery 11 supplies power to the battery protection circuit 13, because the path between the battery 11 and the battery protection circuit 13 is conducted, the load detection circuit 12 is short-circuited at this time, when the battery 11 is connected to the external electronic device 20, the load detection circuit 12 can control the battery protection circuit 13 to operate, and when the battery protection circuit 13 is in an operating state, the load detection circuit 12 is short-circuited and stops operating, so that the load detection circuit 12 can be prevented from being in an operating state all the time to consume electric energy, and further save electric energy.
When the battery 11 is not connected to the external electronic device 20, the load detection circuit 12 stops outputting the first power supply signal, the battery protection circuit 13 lacks a power supply source and is in a non-operating state, that is, the battery protection circuit 13 stops operating, at this time, the battery protection circuit 13 stops outputting the power supply control signal, the switch circuit 14 is in a closed state, and a path between the battery 11 and the battery protection circuit 13 is disconnected. It can be understood that, when the load detection circuit 12 detects that the battery 11 is connected to the external electronic device 20 again, the first power supply signal is generated to control the battery protection circuit 13 to be in the working state, and the battery protection circuit 13 generates the power supply control signal and inputs the power supply control signal to the switch circuit 14, so as to supply power to the battery protection circuit 13 by the battery 11, thereby avoiding the battery protection circuit 13 consuming power when the battery system is not in use, and achieving power saving.
In other embodiments, when the discharge current of the battery 11 is smaller than the set value, it may be considered that the external electronic device 20 is fully charged at this time, or the battery system is not connected to the external electronic device 20, the battery protection circuit 13 may stop operating, and the battery protection circuit 13 may control the switch circuit 14 to open the path between the battery 11 and the battery protection circuit 13, that is, the battery protection circuit 13 is also used to control the switch circuit 14 to open the path between the battery 11 and the battery protection circuit 13 when the discharge current of the battery 11 is smaller than the set value, so as to control the battery 11 to stop supplying power to the external electronic device 20. The setting value is also a current value, and the specific value range can be set according to an actual application scene, which is not described herein again.
Further, when the battery 11 is connected to different external electronic devices 20, the discharge current of the battery 11 may be different, and thus the setting value may be set according to the actual application scenario to adapt to different external electronic devices 20.
Therefore, in the embodiment, whether the battery protection circuit works or not can be controlled by whether the battery is connected with the external electronic equipment or not by the battery system, so that the battery protection circuit is in a working state only when the battery is connected with the external electronic equipment, and does not work when the battery is not connected with the external electronic equipment, and the electric quantity can be saved; meanwhile, a complex circuit structure when the battery protection circuit is connected with the control circuit can be avoided, so that the battery system is simple in structure and small in occupied space, compared with a scheme that a special control pin needs to be designed at the discharge end of the battery, the battery system in the embodiment does not need to additionally increase the control pin, the use number of the control pin is reduced, and the production cost is saved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of a battery system provided in the present application, which is similar to the previous embodiment, and the same circuit structure is not repeated herein.
The battery 11 includes a battery cell 111 and a power supply terminal (not shown), where the battery cell 111 is used to generate a power supply signal, and the power supply terminal is used to connect to the external electronic device 20 to supply power to the external electronic device 20. Specifically, the battery cell 111 is connected to the power supply terminal through the switch circuit 14, after detecting that the battery 11 is connected to the external electronic device 20, the load detection circuit 12 generates a first power supply signal and inputs the first power supply signal to the battery protection circuit 13, so that the battery protection circuit 13 generates a power supply control signal and inputs the power supply control signal to the switch circuit 14, and the switch circuit 14 can turn on a path between the battery 11 and the battery protection circuit 13 and also can turn on a path between the battery cell 111 and the power supply terminal, so that when the battery protection circuit 13 is in an operating state, the external electronic device 20 is powered by the battery 11.
Referring to fig. 2 and fig. 3 in combination, fig. 3 is a schematic structural diagram of the load detection circuit in the embodiment shown in fig. 2, and how the load detection circuit 12 detects whether the battery 11 is connected to the external electronic device 20 is described in detail below.
The battery cell 111 comprises an output end VB and a grounding end GND, the power supply end comprises a first power supply end P + and a second power supply end P-, the external electronic equipment 20 is connected between the first power supply end P + and the second power supply end P-, the first power supply end P + is connected to the output end VB of the battery cell 111 through the switch circuit 14, and the second power supply end P-is connected with the grounding end GND of the battery cell 111.
The load detection circuit 12 is connected to the first power supply terminal P + and the output terminal VB of the battery cell 111, and is configured to detect a resistance value of the external electronic device 20 disposed between the first power supply terminal P + and the second power supply terminal P-, and generate a first power supply signal and input the first power supply signal to the battery protection circuit 13 when the resistance value of the external electronic device 20 is smaller than a first preset value.
Further, as shown in fig. 3, the load detection circuit 12 includes a first resistor R1, a second resistor R2, and a first switch Q1, wherein one end of the first resistor R1 is connected to the first power supply terminal P +; one end of the second resistor R2 is connected to the other end of the first resistor R1, and the other end of the second resistor R2 is connected to the output terminal VB of the battery cell 111; the first end of the first switch tube Q1 is connected with the output end VB of the battery cell 111, the second end of the first switch tube Q1 is connected with the other end of the first resistor R1, and the third end of the first switch tube Q1 is connected with the battery protection circuit 13.
Alternatively, the first switch tube Q1 may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or an Insulated Gate Bipolar Transistor (IGBT), and the first terminal, the second terminal and the third terminal of the first switch tube Q1 are a drain electrode, a Gate electrode and a source electrode, respectively.
When the external electronic device 20 is connected to the first power supply terminal P + and the second power supply terminal P-, the resistance between the first power supply terminal P + and the second power supply terminal P-changes accordingly, and it is easy to understand that when the battery 11 is not connected to the external electronic device 20, the first power supply terminal P + is not communicated with the second power supply terminal P-, and the resistance between the first power supply terminal P + and the second power supply terminal P-is approximately infinite; when the battery 11 is connected to the external electronic device 20, a path is formed between the first power supply terminal P + and the second power supply terminal P —, that is, the first resistor R1, the second resistor R2, the battery cell 111, and the external electronic device 20 form a closed loop, and when the resistance values of the external electronic device 20 are different, voltages at two ends of the second resistor R2 are also different.
Specifically, when the resistance of the external electronic device 20 is smaller than a first preset value, that is, when the voltage across the second resistor R2 is greater than the threshold voltage of the first switch tube Q1, the first switch tube Q1 is turned on, a path between the battery protection circuit 13 and the output terminal VB of the battery cell 111 is opened, the battery protection circuit 13 is in an operating state, the battery protection circuit 13 generates a power supply control signal and inputs the power supply control signal to the switch circuit 14, the path between the battery cell 111 and the first power supply terminal P + is turned on, the load detection circuit 12 is short-circuited, that is, the first resistor R1 and the second resistor R2 are short-circuited, because the voltage across the second resistor R2 is smaller than the threshold voltage of the first switch tube Q1, the first switch tube Q1 is in a cut-off state (that is, the first switch tube Q1 is turned off), and the load detection circuit 12 stops operating, thereby reducing power consumption during the use of the battery 11.
When the resistance of the external electronic device 20 is greater than the first preset value, the voltage at the two ends of the second resistor R2 is less than the threshold voltage of the first switching tube Q1, and it can be considered that the external electronic device 20 is not connected between the first power supply terminal P + and the second power supply terminal P-, at this time, the first switching tube Q1 is in a cut-off state, so as to close the path between the battery protection circuit 13 and the output terminal VB of the battery cell 111, so that when the battery 11 is not connected to the external electronic device 20, the battery protection circuit 13 stops working, and thereby the power consumption is reduced.
Further, the first preset value is related to the resistance of the first resistor R1, the resistance of the second resistor R2, the threshold voltage of the first switching tube Q1, and the power supply voltage of the battery 11, and the first preset value is greater than the resistance of the external electronic device 20 when the power supply terminal is connected to the external electronic device 20.
Taking the battery system shown in fig. 2 as an example, RLoad is used to represent the first preset value, vbat is used to represent the supply voltage of the battery 11, vgs is used to represent the threshold voltage of the first switching tube Q1, and the relationship between Vgs and Vbat is as follows:
Vgs＝Vbat*R2/(R1+R2+RLoad) (1)
the calculation formula of the first preset value can be derived from the above formula as follows:
RLoad＝(R2*Vbat)/Vgs-(R1+R2) (2)
the scheme provided in this embodiment is tested, data shown in table one can be obtained, and values of the first preset value can be specifically shown in table 1 under the condition that the supply voltage of the battery 11 is 6V, 7.4V, and 8.4V, respectively:
TABLE 1 values of the first preset values under different conditions
Generally, the resistance of the input impedance of the external electronic device 20 connected to the power system is generally about 200K Ω, and the first preset value obtained by the above calculation formula (2) is greater than 200K Ω, that is, the first preset value calculated by the calculation formula (2) can ensure that the battery protection circuit 13 is in the working state when the battery 11 is connected to the external electronic device 20.
With continuing reference to fig. 2 and fig. 3, the switch circuit 14 includes a second switch Q2, and the second switch Q2 is connected to the control terminal DSG of the battery protection circuit 13, the first power supply terminal P +, and the output terminal VB of the battery cell 111.
Optionally, the second switching tube Q2 may be a MOSFET or an IGBT, etc., a source of the second switching tube Q2 is connected to the output terminal VB of the battery cell 111, a gate of the second switching tube Q2 is connected to the control terminal DSG of the battery protection circuit 13, a drain of the second switching tube Q2 is connected to the first power supply terminal P +, after the battery protection circuit 13 generates the power supply control signal, the second switching tube Q2 is turned on, the load detection circuit 12 is short-circuited, and the battery 11 supplies power to the battery protection circuit 13 through the second switching tube Q2.
With reference to fig. 2 and fig. 3, the battery system further includes a coupling circuit 15, where the coupling circuit 15 is connected to the switch circuit 14 and the power supply terminal VC of the battery protection circuit 13, and is configured to process the power supply signal output by the battery 11, generate a second power supply signal, and input the second power supply signal to the power supply terminal VC of the battery protection circuit 13, so as to supply power to the battery protection circuit 13 through the coupling circuit 15 when the battery 11 is connected to the external electronic device 20, thereby ensuring that the battery protection circuit 13 is continuously in a working state and improving reliability of the battery system. Alternatively, the coupling circuit 15 may be a coupling resistor R3.
Further, the battery system further includes a one-way conduction circuit 16, the one-way conduction circuit 16 is connected to the battery protection circuit 13 and the load detection circuit 12, and is configured to control the first power supply signal to flow from the load detection circuit 12 to the battery protection circuit 13; when the path between the battery 11 and the battery protection circuit 13 is on, the battery protection circuit 13 is prevented from inputting an electrical signal to the load detection circuit 12, and the second power supply signal can also be prevented from inputting to the load detection circuit 12, thereby improving the reliability of the battery system.
Alternatively, the unidirectional circuit 16 may be a diode D1, and taking the unidirectional circuit 16 as the diode D1 as an example, the anode of the diode D1 is connected to the load detection circuit 12, and the cathode of the diode D1 is connected to the battery protection circuit 13, so that the first power supply signal flows from the load detection circuit 12 to the battery protection circuit 13 only.
Referring to fig. 2 and 4 in combination, fig. 4 is a schematic structural diagram of the battery protection circuit in the embodiment shown in fig. 2, and the battery protection circuit 13 may be a battery protection chip, which is not limited herein. Specifically, the battery protection chip can detect the discharge current of the battery 10, and when the discharge current of the battery 11 is smaller than the set value and the delay exceeds the set time, it may be considered that the battery system is idle, that is, the battery system is not connected to the external electronic device 20, and the battery protection chip enters the power saving mode, that is, the switch circuit 14 disconnects the path between the battery 11 and the battery protection circuit 13, and the battery 11 stops supplying power to the battery protection circuit 13; when the battery system is connected to the external electronic device 20, the battery protection chip can work normally, and the specific working principle is described above and will not be described herein.
Further, referring to fig. 2 and 4, the battery system further includes a charging control circuit 17, the charging control circuit 17 is connected to the battery 11 and an external power source (not shown), and in a charging process of the battery system, after the electric quantity of the battery 11 reaches a preset electric quantity, a path between the external power source and the battery 11 is turned off to stop supplying power to the battery 11, so that the battery 11 is prevented from being overcharged, and the safety of the battery system is improved.
Optionally, the charging control circuit 17 may also be connected to the battery protection circuit 13, and the battery protection circuit 13 may obtain the power of the battery 11, so as to control the charging control circuit 17 to disconnect after the power of the battery 11 reaches a preset power, so as to disconnect the battery 11 from the external power source.
The charging control circuit 17 may be a third switch Q3, the third switch Q3 is connected to the control terminal CHG of the battery protection circuit 13 through a fourth resistor R4, the fourth resistor R4 is connected to the output terminal VB of the battery 11 through a fifth resistor R5, the power terminal VC of the battery protection circuit 13 is connected to the first power terminal P + through a coupling resistor R3, and the control terminal DSG of the battery protection circuit 13 is connected to the first power terminal P + through a sixth resistor R6 and a seventh resistor R7; specifically, the third switching tube Q3 may be a MOSFET or an IGBT, a source of the third switching tube Q3 is connected to the output terminal VB of the battery 11, a gate of the third switching tube Q3 is connected to the control terminal DSG of the battery protection circuit 13, a drain of the third switching tube Q3 is connected to the source of the second switching tube Q2, and when the electric quantity of the battery 11 reaches the preset electric quantity, the third switching tube Q3 is turned off. It should be noted that "VB" ports appear in two places in fig. 4, which indicates that the two ports are both connected to the output terminal VB (shown in fig. 3) of the battery 11, rather than the two ends being respectively connected to different input power sources.
The preset electric quantity may be the remaining electric quantity of the battery 11 being 100% (i.e. the battery 11 is fully charged), etc., and certainly, in this embodiment, the preset electric quantity may also be other electric quantity values, which is not limited herein.
Further, the battery system further includes a discharge port for connecting the external electronic device 20 to supply power to the external electronic device 20, and a charge port (not shown) for connecting an external power source to charge the battery system. It can be understood that when the connection between the external charging power source and the charging port is disconnected, the control terminal CHG of the battery protection circuit 13 controls the third switching tube Q3 to be turned on.
Referring to fig. 5, fig. 5 is a schematic flow chart of an embodiment of a power saving method for a battery system according to the present application, where the method is applied to the battery system described in the above embodiment, the battery system includes a battery, a load detection circuit, a battery protection circuit, and a switch circuit, and specific connection relationships, functions, and working principles are the same as those in the above embodiment, and are not described herein again.
S101: and generating a first power supply signal after detecting that the battery is connected with the external electronic equipment by using the load detection circuit.
The load detection circuit can detect whether the battery is connected with the external electronic equipment, generates a first power supply signal after detecting that the battery is connected with the external electronic equipment, and inputs the first power supply signal to the battery protection circuit. Of course, if the load detection circuit does not detect that the battery is connected with the external electronic device, the load detection circuit stops outputting the first power supply signal, and the battery protection circuit is in a non-working state due to lack of a power supply source, so that the condition that the battery protection circuit consumes electric energy when the battery system is not used is relieved, and the electric energy is saved.
S102: and the battery protection circuit is in a working state after receiving the first power supply signal to generate a power supply control signal.
After the load detection circuit outputs the first power supply signal, the battery protection circuit can receive the first power supply signal, so that the battery protection circuit is in a working state, generates a power supply control signal and outputs the power supply control signal to the switch circuit.
S103: after the switch circuit receives the power supply control signal, the switch circuit is used for conducting a path between the battery and the battery protection circuit so as to enable the load detection circuit to be in short circuit.
Switch circuit receives the power supply control signal after, switches on the route between battery and the battery protection circuit, and load detection circuit short circuit this moment, and the battery can be to the power supply of battery protection circuit to battery protection circuit can be in operating condition, and with monitoring battery system's operating condition, can also avoid load detection circuit to be in operating condition consumption electric energy all the time, and then realize practicing thrift the electric energy.
In summary, the battery system and the power saving method for the battery system provided by the application can control whether the battery protection circuit works or not by whether the battery is connected with the external electronic device, and compared with a scheme that a special control pin needs to be designed at the discharge end of the battery, the battery system and the power saving method for the battery system do not need to additionally increase the control pin while saving electric quantity, reduce the number of the control pins, enable the structure of the battery system to be simple, occupy a smaller space, and contribute to saving production cost.
In addition, in this application, unless specifically stated or limited otherwise, the terms "connected," "stacked," and the like are to be construed broadly and may include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A battery system, comprising:
a battery;
the load detection circuit is connected with the battery and used for generating a first power supply signal after detecting that the battery is connected with external electronic equipment;
the battery protection circuit is connected with the load detection circuit and used for being in a working state after receiving the first power supply signal and generating a power supply control signal;
and the switch circuit is connected with the battery protection circuit and the battery and used for switching on a path between the battery and the battery protection circuit after receiving the power supply control signal so as to enable the load detection circuit to be in short circuit.
2. The battery system according to claim 1,
when the battery is not connected with the external electronic equipment, the load detection circuit stops outputting the first power supply signal, the battery protection circuit is in a non-working state, and the switch circuit is in a disconnected state.
3. The battery system according to claim 1,
the battery comprises an electric core and a power supply end, wherein the electric core is used for generating a power supply signal, and the power supply end is used for connecting the external electronic equipment to supply power for the external electronic equipment.
4. The battery system according to claim 3,
the power supply end comprises a first power supply end and a second power supply end, the load detection circuit is connected with the first power supply end and the battery core and used for detecting the resistance value of the external electronic equipment arranged between the first power supply end and the second power supply end, and when the resistance value of the external electronic equipment is smaller than a first preset value, the first power supply signal is generated.
5. The battery system of claim 4, wherein the load detection circuit comprises:
one end of the first resistor is connected with the first power supply end;
one end of the second resistor is connected with the other end of the first resistor, and the other end of the second resistor is connected with the output end of the battery cell;
the first end of the first switch tube is connected with the output end of the battery core, the second end of the first switch tube is connected with the other end of the first resistor, and the third end of the first switch tube is connected with the battery protection circuit.
6. The battery system according to claim 5,
when the resistance value of the external electronic equipment is smaller than the first preset value, the first switch tube is conducted to conduct a path between the battery protection circuit and the output end of the battery core; when the resistance value of the external electronic device is greater than the first preset value, the first switch tube is cut off to close a path between the battery protection circuit and the output end of the battery core, wherein the first preset value is related to the resistance value of the first resistor, the resistance value of the second resistor, the threshold voltage of the first switch tube and the power supply voltage of the battery.
7. The battery system according to claim 4,
the first preset value is larger than the resistance value of the input impedance of the external electronic equipment when the power supply end is connected with the external electronic equipment; the switch circuit comprises a second switch tube, and the second switch tube is connected with the control end of the battery protection circuit, the first power supply end and the output end of the battery core.
8. The battery system according to claim 1,
the battery system further comprises a coupling circuit, wherein the coupling circuit is connected with the switch circuit and the power supply end of the battery protection circuit and is used for processing the power supply signal output by the battery, generating a second power supply signal, enabling the load detection circuit to be short-circuited, and inputting the second power supply signal to the power supply end of the battery protection circuit to supply power to the battery protection circuit.
9. The battery system according to claim 8,
the battery system further comprises a one-way conduction circuit, wherein the one-way conduction circuit is connected with the battery protection circuit and the load detection circuit and is used for controlling the first power supply signal to flow to the battery protection circuit from the load detection circuit.
10. A power saving method for a battery system, the method being applied to the battery system according to any one of claims 1 to 9, the battery system including a battery, a load detection circuit, a battery protection circuit, and a switch circuit, the method comprising:
generating a first power supply signal after detecting that the battery is connected with external electronic equipment by using the load detection circuit;
generating a power supply control signal by utilizing the working state of the battery protection circuit after receiving the first power supply signal;
and after the switch circuit receives the power supply control signal, the switch circuit is utilized to conduct a path between the battery and the battery protection circuit so as to enable the load detection circuit to be in short circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110668142.5A CN115483726A (en) | 2021-06-16 | 2021-06-16 | Battery system and power saving method of battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110668142.5A CN115483726A (en) | 2021-06-16 | 2021-06-16 | Battery system and power saving method of battery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115483726A true CN115483726A (en) | 2022-12-16 |
Family
ID=84418864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110668142.5A Pending CN115483726A (en) | 2021-06-16 | 2021-06-16 | Battery system and power saving method of battery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115483726A (en) |
-
2021
- 2021-06-16 CN CN202110668142.5A patent/CN115483726A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104600676B (en) | Battery protecting circuit, electric energy provide device and electronic installation | |
| US7463008B2 (en) | Power supply apparatus with transistor control for constant current between series-connected battery blocks | |
| CN104022541B (en) | Charge-discharge control circuit and cell apparatus | |
| CN113741261B (en) | Power-on and power-off control circuit and signal output device | |
| WO2023016574A1 (en) | Switching circuit, battery management system, battery pack, electrical device and control method | |
| CN206547012U (en) | Charging circuit and electronic equipment | |
| CN111313374A (en) | Battery system under-voltage protection circuit and method applied to electric bicycle BMS | |
| CN104426127A (en) | Load starting circuit | |
| CN108767837B (en) | Power connection method, power connector anti-sparking circuit and power with circuit | |
| JP2015100046A (en) | Battery management circuit of battery management device | |
| CN201222649Y (en) | Overdischarging protection circuit capable of charging battery | |
| CN115483726A (en) | Battery system and power saving method of battery system | |
| CN212304777U (en) | Single-circuit battery discharge circuit | |
| CN210985634U (en) | Reverse connection protection circuit of rechargeable battery | |
| US7230353B2 (en) | Charging circuit in uninterruptible power supply system | |
| CN212114183U (en) | TYPE-C interface module, data line and power transmission circuit | |
| CN111293755B (en) | Protection circuit for equalizing discharge of parallel battery pack and chargeable device | |
| WO2021104373A1 (en) | Multiple-battery switching control circuit, apparatus and system, and control method | |
| CN114006433A (en) | Battery device | |
| CN204464971U (en) | Battery protecting circuit, electric energy generator and electronic installation | |
| CN209767182U (en) | Battery protection circuit | |
| CN114243830A (en) | Identification circuit, battery management system, battery pack and electronic device | |
| CN214506641U (en) | Dual-power switching circuit and power supply device | |
| JP2003079058A (en) | Battery pack | |
| CN219960206U (en) | Emergency switching circuit for power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |