CN117578669A - Battery charging and discharging device, control method thereof and electronic equipment - Google Patents
Battery charging and discharging device, control method thereof and electronic equipment Download PDFInfo
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- CN117578669A CN117578669A CN202311616440.5A CN202311616440A CN117578669A CN 117578669 A CN117578669 A CN 117578669A CN 202311616440 A CN202311616440 A CN 202311616440A CN 117578669 A CN117578669 A CN 117578669A
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- 238000007599 discharging Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000006854 communication Effects 0.000 claims description 35
- 238000004891 communication Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 25
- 238000010586 diagram Methods 0.000 description 14
- 238000013475 authorization Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003571 electronic cigarette Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
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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
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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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/007—Regulation of charging or discharging current or voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the invention discloses a battery charging and discharging device, a control method thereof and electronic equipment, wherein the device comprises a battery module and a main control module, the battery module comprises a battery body and a battery protection circuit, the battery protection circuit comprises a basic protection circuit, a switch unit and an encryption unit, a first end of the battery body is connected with a first end of the main control module, a second end of the main control module is connected with a first end of the switch unit, a second end of the switch unit is connected with a second end of the battery body, and a control end of the switch unit is connected with an output end of the basic protection circuit; the encryption unit is connected with the main control module at least, and the encryption unit is used for communicating with the main control module to detect whether the battery body is an authorized battery, and the main control module is used for sending data information to the encryption unit and controlling the charge-discharge loop of the battery module to be switched on or switched off according to feedback information of the encryption unit. The scheme can improve the safety of using the unauthorized battery.
Description
Technical Field
The embodiment of the invention relates to the technical field of battery charging and discharging, in particular to a battery charging and discharging device, a control method thereof and electronic equipment.
Background
With the rapid development of technology, mobile devices such as mobile phones, electronic cigarettes, mobile power supplies, TWS (real wireless stereo) headphones, smart bracelet watches and the like which take lithium ion batteries as power supply devices are popularized, and are popular with vast users.
At present, as the capacity of the battery is larger and larger, the charging current is correspondingly larger and larger, and meanwhile, due to popularization of a quick charging technology, the charging current is larger and the charging time of the battery is shorter and shorter. For electronic equipment supporting a detachable battery, when the battery is replaced, the battery with poor quality or inconsistent capacity can be replaced, if the battery is still charged or even quickly charged by the original charging current, the charging current can exceed the charging current allowed by the battery and stop charging, or the charging current of the battery is not exceeded but is larger than the recommended charging current, so that the battery can be charged and unsaturated, the service life of the system is influenced due to the fact that the capacity of the battery is reduced after multiple uses, the service life of the battery is also influenced, and even the battery is damaged or even exploded when serious, so that the safety problem is brought.
Disclosure of Invention
The embodiment of the invention provides a battery charging and discharging device, a control method thereof and electronic equipment, which are used for verifying and protecting batteries in the charging and discharging process and preventing unmatched batteries from being charged or being charged and discharged quickly.
According to an aspect of the present invention, there is provided a battery charging and discharging device including: the battery module comprises a battery body and a battery protection circuit;
the battery protection circuit comprises a basic protection circuit, a switch unit and an encryption unit, wherein the first end of the battery body is connected with the first end of the main control module, the second end of the main control module is connected with the first end of the switch unit, the second end of the switch unit is connected with the second end of the battery body, and the control end of the switch unit is connected with the output end of the basic protection circuit;
the encryption unit is at least connected with the main control module, the encryption unit is used for communicating with the main control module to detect whether the battery body is an authorized battery, and the main control module is used for sending data information to the encryption unit and controlling the charge and discharge loop of the battery module to be conducted or disconnected according to feedback information of the encryption unit.
Optionally, the encryption unit includes a clock end and a data end, the master control module further includes a clock end and a data end, the clock end of the encryption unit is connected with the clock end of the master control module through a clock line, and the data end of the encryption unit is connected with the data end of the master control module through a data line.
Optionally, the encryption unit includes a transceiver, the main control module further includes a transceiver, and the transceiver of the encryption unit is connected with the transceiver of the main control module through a communication line.
Optionally, the data received or output by the encryption unit includes a plurality of first pulse signals, and pulse widths of the plurality of first pulse signals are the same.
Optionally, the data received or output by the encryption unit includes a plurality of first pulse signals and a plurality of second pulse signals, and the pulse width of the first pulse signals is larger than the pulse width of the second pulse signals.
Optionally, the battery protection circuit further comprises an operation unit, and the output end of the basic protection circuit is connected with the control end of the switch unit through the operation unit;
the encryption unit is also connected with the operation unit, and the operation unit is used for operating the signal output by the basic protection circuit and the signal output by the encryption unit and outputting a control signal to the switch unit;
the operation unit comprises one or more of an adder, a multiplier, a divider and a logic gate.
Optionally, the battery charging and discharging device further includes a temperature detection module, the temperature detection module is connected with the encryption unit, and the main control module is further configured to control the charging and discharging circuit of the battery module to be disconnected when the temperature detection module detects that the temperature of the battery body exceeds a preset temperature.
Optionally, the encryption unit includes a switch subunit, the temperature detection module is connected with the main control module through the switch subunit, and the encryption unit is used for controlling the switch subunit to be turned on after the main control module determines whether the battery body is an authorized battery;
the temperature detection module comprises a negative temperature coefficient resistor.
According to another aspect of the present invention, there is provided a control method of a battery charging and discharging device, the battery charging and discharging device including a battery module and a main control module, the battery module including a battery body and a battery protection circuit, the battery protection circuit including a basic protection circuit, a switching unit and an encryption unit, a first end of the battery body being connected to a first end of the main control module, a second end of the main control module being connected to a first end of the switching unit, a second end of the switching unit being connected to a second end of the battery body, a control end of the switching unit being connected to an output end of the basic protection circuit;
the control method of the battery charging and discharging device comprises the following steps:
after the preset time, the encryption unit is controlled to receive the data information sent by the main control module, feedback information is output to the main control module after the delay time, and the main control module is controlled to judge whether the battery body is an authorized battery according to the data information and the feedback information so as to control the charge and discharge loop of the battery module to be turned on or off.
According to another aspect of the present invention, there is provided an electronic device including the battery charging and discharging apparatus provided by any of the embodiments of the present invention.
According to the technical scheme provided by the embodiment of the invention, the encryption unit is integrated in the battery protection circuit in the battery module, the encryption unit is controlled to communicate with the main control module, and the main control module is used for judging whether the battery body contained in the battery module is an authorized battery or not. If the battery is authorized, the main control module controls the charge loop or the discharge loop of the battery module to be conducted, and the battery module is allowed to charge and discharge; if the battery is not authorized, the main control module controls the charging loop or the discharging loop of the battery module to be disconnected, and the battery module is not allowed to charge or discharge, or the battery module is allowed to charge or discharge with small current, so that the safety of using the unauthorized battery is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery charging and discharging device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a communication waveform according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another communication waveform according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a battery charging and discharging device according to an embodiment of the present invention, and referring to fig. 1, the battery charging and discharging device provided in this embodiment includes a battery module and a main control module 10, where the battery module includes a battery body BAT and a battery protection circuit 20.
The battery protection circuit 20 comprises a basic protection circuit 201, a switch unit 202 and an encryption unit 203, wherein a first end of a battery body BAT is connected with a first end of a main control module 10, a second end of the main control module 10 is connected with the first end of the switch unit 202, a second end of the switch unit 202 is connected with a second end of the battery body BAT, and a control end of the switch unit 202 is connected with an output end of the basic protection circuit 201.
The first end of the battery body BAT may be an anode, the second end may be a cathode, the anode of the battery body BAT is used as a positive output end p+ of the battery module, the cathode of the battery body BAT is connected with the second end of the switch unit 202, the first end of the switch unit 202 is used as a negative output end P-of the battery module, and the battery protection circuit 20 is used for protecting a charging and discharging process of the battery module. The basic protection circuit 201 is a main protection module in the battery protection circuit 20, and illustratively, a plurality of voltage thresholds are disposed inside the basic protection circuit 201, and can control the on-off of the switch unit 202 according to the voltage of the first end and the negative output end P-of the battery body BAT, so as to open different protection states, such as charge overvoltage protection, discharge undervoltage protection, charge overcurrent protection, discharge short-circuit protection, and the like.
The main control module 10 is connected between a positive output end p+ and a negative output end P-of the battery module, and the main control module 10 may include an MCU, a charging unit and a load unit, wherein a charging loop is formed between the charging unit and the battery module, and a discharging loop is formed between the load unit and the battery module.
In this embodiment, the encryption unit 203 is at least connected to the main control module 10, the encryption unit 203 is configured to communicate with the main control module 10 (specifically, the MCU in the main control module 10) to detect whether the battery body BAT is an authorized battery, and the main control module 10 is configured to send data information to the encryption unit 203 and control the charge-discharge loop of the battery module to be turned on or off according to feedback information of the encryption unit 203.
Specifically, after the battery module is replaced, if the battery module is not an authorized battery, the encryption unit 203 does not exist in the battery module, or the encryption unit 203 and the main control module 10 cannot communicate with each other, if the signals of the communication are not opposite, the main control module 10 cannot receive the feedback information of the battery module, or the feedback information received by the main control module 10 cannot pass the verification of the main control module, it is determined that the current battery module (battery body BAT) is not an authorized battery, and the main control module 10 controls the charging circuit to be disconnected, so that the battery module is not allowed to be charged. When the feedback information received by the main control module 10 can pass the verification of the main control module, the current battery module is judged to be an authorized battery, and the main control module 10 controls the conduction of a charging loop to allow charging or quick charging.
Similarly, for the discharging situation, when the current battery module is determined to be an authorized battery, the main control module 10 controls the discharging loop to be conducted, so as to allow the battery module to normally discharge or discharge with a large current. If it is determined that the current battery module is not an authorized battery, the main control module 10 controls the discharge circuit to be disconnected, and the battery module is not allowed to discharge.
Of course, in other embodiments, if it is determined that the battery module is not an authorized battery, the main control module 10 may also control the battery module to charge or discharge with a small current.
According to the technical scheme provided by the embodiment of the invention, the encryption unit is integrated in the battery protection circuit in the battery module, the encryption unit is controlled to communicate with the main control module, and the main control module is used for judging whether the battery body contained in the battery module is an authorized battery or not. If the battery is authorized, the main control module controls the charge loop or the discharge loop of the battery module to be conducted, and the battery module is allowed to charge and discharge; if the battery is not authorized, the main control module controls the charging loop or the discharging loop of the battery module to be disconnected, and the battery module is not allowed to charge or discharge, or the battery module is allowed to charge or discharge with small current, so that the safety of using the unauthorized battery is improved.
Alternatively, the encryption unit 203 and the main control module 10 may be connected through a communication line, or may be connected wirelessly. The following examples are all illustrated with a wired connection.
Fig. 2 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention, referring to fig. 2, based on the above technical solution, optionally, the battery protection circuit 20 further includes an operation unit 204, and an output end of the basic protection circuit 201 is connected to a control end of the switch unit 202 through the operation unit 204; the encryption unit 203 is further connected to an operation unit 204, and the operation unit 204 is configured to operate the signal output from the basic protection circuit 201 and the signal output from the encryption unit 203, and output a control signal to the switching unit 202.
Specifically, an operation unit 204 is further disposed on a connection path between the basic protection circuit 201 and the switch unit 202, the encryption unit 203 is further connected to the operation unit 204, and after the communication with the main control module 10 is completed, the encryption unit 203 may send an output signal to the operation unit 204, where the output signal may be a signal corresponding to a determination result fed back to the encryption unit 203 by the main control module 10. For example, after the encryption unit 203 and the main control module 10 end communication, the main control module 10 determines that the current battery module is an authorized battery according to the data information sent by the encryption unit 203, and then feeds back an authorization signal to the encryption unit 203, the encryption unit 203 sends the received authorization signal to the operation unit 204, and the operation unit 204 calculates the protection signal output by the basic protection circuit 201 and the authorization signal output by the encryption unit 203, and outputs a control signal to enable the switch unit 202 to be turned on, so as to allow the battery module to charge and discharge. If the main control module 10 determines that the current battery module is not an authorized battery according to the data information sent by the encryption unit 203, an unauthorized signal is fed back to the encryption unit 203, the encryption unit 203 sends the received unauthorized signal to the operation unit 204, the operation unit 204 performs operation on the protection signal output by the basic protection circuit 201 and the unauthorized signal output by the encryption unit 203, and outputs a control signal to enable the switch unit 202 to be turned off, and meanwhile, the main control module 10 controls the charge and discharge circuit of the battery module to be disconnected according to the unauthorized signal, so that the battery module is not allowed to be charged and discharged.
According to the technical scheme provided by the embodiment, the operation unit 204 is arranged, so that the encryption unit 203 can control the switch unit 202, and when the battery module is an unauthorized battery, the charging loop between the battery module and the main control module 10 can be further ensured to be normally disconnected, the battery module is prevented from being charged by the original charging strategy, and the use safety of the unauthorized battery is improved.
Optionally, in the present embodiment, the operation unit 204 includes one or more of an adder, a multiplier, a divider, and a logic gate to perform a logic operation on the two input signals.
Fig. 3 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention, referring to fig. 3, optionally, the encryption unit 203 includes a clock end and a data end, the main control module 10 further includes a clock end and a data end, the clock end of the encryption unit 203 is connected to the clock end of the main control module 10 through a clock line SCL, and the data end of the encryption unit 203 is connected to the data end of the main control module 10 through a data line SDA. That is, the main control module 10 and the encryption unit 203 communicate with each other over a two-wire line, such as an I2C bus. Wherein the clock line SCL is used for transmitting clock signals and the data line SDA is used for transmitting data signals. The specific working principle of the two-wire communication mode can refer to the related description in the prior art, and is not repeated here.
Fig. 4 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention, and referring to fig. 4, based on the above technical solutions, optionally, single-wire communication may be further performed between the encryption unit 203 and the main control module 10. Specifically, the encryption unit 203 includes a transceiver, the main control module 10 further includes a transceiver, and the transceiver of the encryption unit 203 is connected to the transceiver of the main control module 10 through a communication line CLL. Wherein, the data signal and the clock signal are transmitted through the communication line CLL after being superimposed, so as to realize the communication between the main control module 10 and the encryption unit 203.
Wherein, each receiving and transmitting end is an I/O port.
Fig. 5 is a schematic diagram of a communication waveform provided in an embodiment of the present invention, which is applicable to the communication of the battery charging and discharging device shown in fig. 4, and in combination with fig. 4 and 5, after the battery module is connected to the main control module 10 and the communication detection time Ton passes, the main control module 10 and the encryption unit 203 start to communicate, the communication time Tcom is set, and the encryption unit 203 resets after the communication is ended. In the communication process, the data sent by the encryption unit 203 to the main control module 10 includes a plurality of first pulse signals, where the pulse width (high level duration) of the first pulse signals is TB1R, and the pulse widths of the first pulse signals are the same. Similarly, the pulse width of the pulse signal of the data sent by the encryption unit 203 to the main control module 10 is TB1W. Wherein TB is 1 bit time. Here, in the 1-bit time, the low level is denoted as data 0, and the high level is denoted as data 1.
If the data received by the encryption unit 203 is inconsistent with the data sent by the encryption unit, the main control module 10 determines that the current battery module is not an authorized battery, and does not allow the battery module to be charged or discharged. If the data received by the encryption unit 203 is consistent with the data sent by the encryption unit, the main control module 10 determines that the current battery module is an authorized battery, and allows the battery module to be charged and discharged. Illustratively, the data received by the encryption unit 203 is 01101010, and if the data sent by the encryption unit is 01101010, it indicates that the current battery module is an authorized battery; if the data sent by the encryption unit 203 is 01101011, it indicates that the current battery module is not an authorized battery.
Alternatively, the length of the data received or transmitted by the encryption unit 203 may be set according to actual requirements, which is not limited by the comparison in this embodiment.
Fig. 6 is a schematic diagram of another communication waveform provided in the embodiment of the present invention, which is also applicable to the communication of the battery charging and discharging device shown in fig. 4, and in combination with fig. 4 and 6, after the battery module is connected to the main control module 10 and the communication detection time Ton passes, the main control module 10 and the encryption unit 203 start to communicate, the communication time Tcom is set, and the encryption unit 203 resets after the communication is ended. In the communication process, the encryption unit 203 receives data sent by the main control module 10 and includes a plurality of first pulse signals and a plurality of second pulse signals, wherein a pulse width (high level duration) of the first pulse signals is TB1R, a pulse width of the second pulse signals is TB0R, and a pulse width of the first pulse signals is greater than a pulse width of the second pulse signals, that is, a high level duration of the first pulse signals is longer than a high level duration of the second pulse signals in a 1 bit time TB. Similarly, the pulse width of the first pulse signal of the data sent by the encryption unit 203 to the main control module 10 is TB1W, and the pulse width of the second pulse signal is TB0W. In the 1-bit time TB, the second pulse signal is denoted as data 0, and the first pulse signal is denoted as data 1.
In this embodiment, different pulse signals with different pulse widths are used to represent different data information, so that the problem of data dislocation caused by mismatching of clocks among modules is prevented, and the accuracy of receiving and transmitting data by the encryption unit 203 is improved, thereby improving the accuracy of verifying the battery module.
Fig. 7 is a schematic structural diagram of another battery charging and discharging device according to an embodiment of the present invention, referring to fig. 7, based on the above technical solutions, optionally, the battery charging and discharging device further includes a temperature detection module 30, where the temperature detection module 30 is connected to the encryption unit 203, and the main control module 10 is further configured to control the charging and discharging circuit of the battery module to be disconnected when the temperature detection module 30 detects that the temperature of the battery body BAT exceeds a preset temperature.
Specifically, the encryption unit 203 includes a switch subunit inside for connecting the communication line CLL and the temperature detection module 30. When the communication between the encryption unit 203 and the main control module 10 is finished (refer to communication when determining whether the battery module is an authorized battery), the switch subunit is turned on, and the temperature detection module 30 is connected with the communication line CLL through the switch subunit, so as to be connected to the main control module 10, and the main control module 10 controls the charge and discharge loop of the battery module to be turned on or off according to the temperature information detected by the temperature detection module 30, so as to realize the temperature protection of the battery module. Here, the temperature protection may be over-temperature protection, and in some particular embodiments, may also be low-temperature protection.
In this embodiment, the temperature detection module 30 includes a negative temperature coefficient resistor.
According to the technical scheme provided by the embodiment, the temperature detection module 30 is additionally arranged, so that the temperature detection of the battery body BAT can be realized, if the detected temperature is too high or too low, the charging current or the discharging current can be reduced through the main control module 10, and even the current can be reduced to zero through the main control module 10, so that the charging and discharging of the battery module are stopped, and the purpose of protecting the battery module is further achieved. By providing the temperature detection module 30 and connecting with the encryption unit 203, the wires for communication between the main control module 10 and the encryption unit 203 and the wires for detecting temperature can be combined into one wire, and all wires are replaced by communication wires CLL, so that the number of signal wires is reduced, and the circuit structure is simplified.
It should be noted that, whether the current battery module is an authorized battery or not is determined by the main control module 10, the battery module is subjected to temperature detection, so that explosion risks caused by overhigh temperature when the unauthorized battery module is charged with high current are avoided.
With continued reference to fig. 7, optionally, the battery module further includes a first resistor R1 and a first capacitor C1, where the first resistor R1 is connected between the positive electrode of the battery body BAT and the power supply terminal of the basic protection circuit 201, and is used to perform a voltage division function; the first capacitor C1 is connected between the power supply terminal of the basic protection circuit 201 and the negative electrode of the battery body BAT, and is used for filtering and stabilizing voltage.
Optionally, the embodiment of the invention further provides a control method of the battery charging and discharging device, which can be used for controlling the battery charging and discharging device provided by any embodiment of the invention. The battery charging and discharging device comprises a battery module and a main control module 10, wherein the battery module comprises a battery body BAT and a battery protection circuit 20, the battery protection circuit 20 comprises a basic protection circuit 201, a switch unit 202 and an encryption unit 203, a first end of the battery body BAT is connected with a first end of the main control module 10, a second end of the main control module 10 is connected with a first end of the switch unit 202, a second end of the switch unit 202 is connected with a second end of the battery body BAT, and a control end of the switch unit 202 is connected with an output end of the basic protection circuit 20. The switching unit 202 may include a transistor, e.g., a MOS transistor.
The control method of the battery charging and discharging device comprises the following steps:
after the preset time, the control encryption unit 203 receives the data information sent by the main control module 10, and outputs feedback information to the main control module 10 after the delay time, and controls the main control module 10 to determine whether the battery body BAT is an authorized battery according to the data information and the feedback information, so as to control the charge and discharge loop of the battery module to be turned on or off.
The preset time may be a communication detection time, and when the communication detection time is over, communication is started. In the communication process, the encryption unit 203 receives the data information (including the pulse signal) sent by the main control module 10, and after a certain delay, the encryption unit 203 outputs feedback information (also data information including the pulse signal) to the main control module 10. The main control module 10 determines whether the battery module is an authorized battery according to the data received by the encryption unit 203 and the data sent by the encryption unit. If the data received by the encryption unit 203 is inconsistent with the data sent by the encryption unit, the main control module 10 determines that the current battery module is not an authorized battery, and does not allow the battery module to be charged or discharged. If the data received by the encryption unit 203 is consistent with the data sent by the encryption unit, the main control module 10 determines that the current battery module is an authorized battery, and allows the battery module to be charged and discharged.
According to the control method of the battery charging and discharging device, the encryption unit is controlled to communicate with the main control module, and whether the battery body contained in the battery module is an authorized battery is judged through the main control module. If the battery is authorized, the main control module controls the charge loop or the discharge loop of the battery module to be conducted, and the battery module is allowed to charge and discharge; if the battery is not authorized, the main control module controls the charging loop or the discharging loop of the battery module to be disconnected, and the battery module is not allowed to charge or discharge, or the battery module is allowed to charge or discharge with small current, so that the safety of using the unauthorized battery is improved.
Optionally, the embodiment of the invention further provides an electronic device, which includes the battery charging and discharging device provided in any embodiment, and the electronic device may be a device for using a large-capacity battery such as a mobile phone, a notebook computer, a mobile power supply, or a device for using a small-capacity battery such as a TWS, an electronic watch, an electronic wristband, etc. The electronic equipment also has the beneficial effects described in any embodiment because the electronic equipment comprises the battery charging and discharging device provided by any embodiment of the invention.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A battery charging and discharging device, comprising: the battery module comprises a battery body and a battery protection circuit;
the battery protection circuit comprises a basic protection circuit, a switch unit and an encryption unit, wherein the first end of the battery body is connected with the first end of the main control module, the second end of the main control module is connected with the first end of the switch unit, the second end of the switch unit is connected with the second end of the battery body, and the control end of the switch unit is connected with the output end of the basic protection circuit;
the encryption unit is at least connected with the main control module, the encryption unit is used for communicating with the main control module to detect whether the battery body is an authorized battery, and the main control module is used for sending data information to the encryption unit and controlling the charge and discharge loop of the battery module to be conducted or disconnected according to feedback information of the encryption unit.
2. The battery charging and discharging device according to claim 1, wherein the encryption unit comprises a clock end and a data end, the master control module further comprises a clock end and a data end, the clock end of the encryption unit is connected with the clock end of the master control module through a clock line, and the data end of the encryption unit is connected with the data end of the master control module through a data line.
3. The battery charging and discharging device according to claim 1, wherein the encryption unit comprises a transceiver, the main control module further comprises a transceiver, and the transceiver of the encryption unit is connected with the transceiver of the main control module through a communication line.
4. The battery charging and discharging apparatus according to claim 3, wherein the data received or outputted by the encryption unit includes a plurality of first pulse signals having the same pulse width.
5. The battery charge and discharge apparatus according to claim 3, wherein the data received or outputted by the encryption unit includes a plurality of first pulse signals and a plurality of second pulse signals, and the pulse width of the first pulse signals is greater than the pulse width of the second pulse signals.
6. The battery charging and discharging device according to claim 1, wherein the battery protection circuit further comprises an operation unit, and an output terminal of the basic protection circuit is connected with a control terminal of the switching unit via the operation unit;
the encryption unit is also connected with the operation unit, and the operation unit is used for operating the signal output by the basic protection circuit and the signal output by the encryption unit and outputting a control signal to the switch unit;
the operation unit comprises one or more of an adder, a multiplier, a divider and a logic gate.
7. The battery charging and discharging device according to claim 1, further comprising a temperature detection module, wherein the temperature detection module is connected with the encryption unit, and the main control module is further configured to control the charging and discharging circuit of the battery module to be disconnected when the temperature detection module detects that the temperature of the battery body exceeds a preset temperature.
8. The battery charging and discharging device according to claim 7, wherein the encryption unit comprises a switch subunit, the temperature detection module is connected with the main control module through the switch subunit, and the encryption unit is used for controlling the switch subunit to be turned on after the main control module determines whether the battery body is an authorized battery;
the temperature detection module comprises a negative temperature coefficient resistor.
9. The control method of the battery charging and discharging device is characterized in that the battery charging and discharging device comprises a battery module and a main control module, the battery module comprises a battery body and a battery protection circuit, the battery protection circuit comprises a basic protection circuit, a switch unit and an encryption unit, a first end of the battery body is connected with a first end of the main control module, a second end of the main control module is connected with a first end of the switch unit, a second end of the switch unit is connected with a second end of the battery body, and a control end of the switch unit is connected with an output end of the basic protection circuit;
the control method of the battery charging and discharging device comprises the following steps:
after the preset time, the encryption unit is controlled to receive the data information sent by the main control module, feedback information is output to the main control module after the delay time, and the main control module is controlled to judge whether the battery body is an authorized battery according to the data information and the feedback information so as to control the charge and discharge loop of the battery module to be turned on or off.
10. An electronic device comprising a battery charging and discharging apparatus according to any one of claims 1 to 8.
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| CN202311616440.5A CN117578669A (en) | 2023-11-29 | 2023-11-29 | Battery charging and discharging device, control method thereof and electronic equipment |
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