CN211377645U - Electronic device for rechargeable battery - Google Patents
Electronic device for rechargeable battery Download PDFInfo
- Publication number
- CN211377645U CN211377645U CN202020137049.2U CN202020137049U CN211377645U CN 211377645 U CN211377645 U CN 211377645U CN 202020137049 U CN202020137049 U CN 202020137049U CN 211377645 U CN211377645 U CN 211377645U
- Authority
- CN
- China
- Prior art keywords
- circuit
- battery protection
- detector
- electronic device
- battery
- 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.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The utility model relates to an electronic device for a chargeable battery, which comprises a charging circuit, a discharging circuit, a battery protection control circuit and a battery protection switch; one end of the charging circuit is connected with the input end, and the other end of the charging circuit is connected with the discharging circuit and the battery protection switch; the battery protection switch is connected with the battery; the input end of the battery protection control circuit is connected to the battery protection switch, the output end of the battery protection control circuit is connected to the charging circuit, the discharging circuit and the battery protection switch, and the discharging circuit is connected to the output end. The utility model can use a PMOS tube to complete the function of the battery protection switch, and has high reliability; in addition, the circuits with a plurality of functions can be integrated together, so that the integration level of the electronic device is higher, and the use cost of a user is reduced.
Description
Technical Field
The utility model belongs to the technical field of the battery, specifically speaking relates to an electron device for rechargeable battery.
Background
In order to ensure the stability and safety of the rechargeable battery, a battery protection plate device is configured to perform normal charging and discharging of the battery and to perform the functions of disconnection and protection in various abnormal states when the rechargeable battery is used in the battery device.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of a rechargeable battery powered electronic device in the prior art, including a first battery 104, a first input terminal 101, a first output terminal 107, a first charging circuit 102, a first discharging circuit 103, a first battery protection control circuit 105, and a first battery protection switch 106; the first battery protection switch 106 includes two series NMOS transistors with small internal resistance, i.e. the first power transistor N1And a second power tube N2(ii) a Wherein the first power tube N1Is connected to the negative pole of the first battery 104, the first power tube N1Source electrode of and the second power transistor N2Is connected to the source of the second power transistor N2The drain of the first power transistor is grounded, and the first battery protection control circuit 105 controls the first power transistor N1And a second power tube N2To further control the on and off of the first charging circuit 102 and the first discharging circuit 103, and to complete the determination and control of the overcharge, overdischarge, overcurrent, and short circuit states.
Although the electronic device has certain reliability, the dual NMOS transistors must be used to control the charging and discharging states of the electronic device; moreover, the first battery protection control circuit 105 must use the negative pole of the battery as the reference ground, and the first charging circuit 102 and the first discharging circuit 103 must use the device ground as the reference ground, so that the first battery protection control circuit 105 must be formed separately, and the first battery protection control circuit 105 cannot be integrated with the first charging circuit 102 and the first discharging circuit 103, so that the integration level of the electronic device is low and the use cost of the electronic device is increased.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides an electronic device for a rechargeable battery to solve at least one technical problem in the prior art.
The technical scheme of the utility model is that:
the embodiment of the utility model provides an electronic device for rechargeable battery, this electronic device includes charging circuit, discharge circuit, battery protection control circuit and battery protection switch;
one end of the charging circuit is connected with the input end, and the other end of the charging circuit is connected with the discharging circuit and the battery protection switch; the battery protection switch is connected with the battery;
the input end of the battery protection control circuit is connected to the battery protection switch, the output end of the battery protection control circuit is connected to the charging circuit, the discharging circuit and the battery protection switch, and the discharging circuit is connected to the output end.
Furthermore, the battery protection control circuit comprises a power supply detector, a charging state detector, a logic circuit and a power supply circuit;
the output end of the power supply detector is connected with the power supply circuit;
the input ends of the power supply detector and the charging state detector are connected between voltage dividing resistors of the battery protection control circuit;
the output end of the charging state detector is connected with the logic circuit.
Further, the logic circuit comprises a first port, a second port and a third port, wherein the first port is used for controlling the conduction or the closing of the battery protection switch, the second port is used for controlling the conduction or the closing of the charging circuit, and the third port is used for controlling the conduction or the closing of the discharging circuit.
Furthermore, the electronic device further comprises a power path management circuit, wherein one end of the power path management circuit is connected with the charging circuit, and the other end of the power path management circuit is connected with the discharging circuit.
Further, the power supply path management circuit is a one-way switch circuit with under/over voltage protection and over current protection or a diode with low conduction voltage drop.
Furthermore, the battery protection control circuit further comprises an overcharge detector, an overdischarge detector, a short-circuit detector and an overcurrent detector, wherein the input ends of the overcharge detector, the overdischarge detector, the short-circuit detector and the overcurrent detector are connected between divider resistors of the battery protection control circuit, and the output ends of the overcharge detector, the overdischarge detector, the short-circuit detector and the overcurrent detector are connected with a logic circuit.
Further, the charging circuit is a linear type charging circuit, a switch type charging circuit or an impulse type charging circuit which can be turned off.
Further, the discharge circuit is a load which can be turned off or a power supply which can be turned off.
Further, the battery protection switch comprises one or more PMOS tubes.
Furthermore, the charging circuit, the discharging circuit, the battery protection control circuit, the battery protection switch and the power path management circuit are partially or completely integrated into a circuit.
The utility model can use a PMOS tube to complete the function of the battery protection switch, and has high reliability; in addition, the circuits with a plurality of functions can be integrated together, so that the integration level of the electronic device is higher, and the use cost of a user is reduced.
Drawings
FIG. 1 is a schematic circuit diagram of a rechargeable battery powered electronic device according to the prior art;
fig. 2 is a schematic circuit diagram of an electronic device for a rechargeable battery according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a battery protection control circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a second embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a third embodiment of the present invention;
fig. 6 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a fourth embodiment of the present invention;
fig. 7 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a fifth embodiment of the present invention;
whereinA first input terminal-101, a first charging circuit-102, a first discharging circuit-103, a first battery-104, a first battery protection control circuit-105, a first battery protection switch-106, a first output terminal-107, a first power tube-N1A second power tube-N2；
A second input terminal-201, a second charging circuit-202, a second discharging circuit-203, a second battery-204, a second battery protection control circuit-205, a second battery protection switch-206, a second output terminal 207, a first PMOS transistor-P1A second PMOS transistor-P2；
A power supply detector-311, an overcharge detector-312, an overdischarge detector-313, a short-circuit detector-314, an overcurrent detector-315, a charge state detector-316, a delay controller-317, a logic circuit-318, a power supply circuit-319, a first port-OS, a second port-OC and a third port-OD;
a third input terminal-401, a third output terminal-402, a first power path management circuit-403, a first charge/discharge circuit 404, a third battery protection control circuit-405, a third battery protection switch-406, a third battery-407;
a fourth input terminal-501, a first integrated circuit-510, a fourth charging circuit-511, a fourth discharging circuit-512, a fourth battery protection control circuit-513, a fourth battery protection switch-502, a fourth battery-503, and a fourth output terminal-504;
a fifth input terminal-601, a fifth output terminal-602, a fifth battery protection switch-603, a fifth battery-604, a second integrated circuit-610, a second power path management circuit-611, a second charge/discharge circuit-612, a fifth battery protection control circuit-613;
a sixth input terminal-701, a sixth output terminal-702, a third power path management circuit-703, a sixth battery protection switch-704, a sixth battery-705, a third integrated circuit-710, a third charge/discharge circuit-711, and a sixth battery protection control circuit-712.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Certain terms are used throughout the description and claims to refer to particular components as would be understood by one of ordinary skill in the art. The present specification and the appended claims are intended to cover all such modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to," and "couple" is meant to encompass both direct and indirect electrical connections. Therefore, if a first circuit is coupled to a second circuit, it means that the first circuit can be directly electrically connected to the second circuit, or indirectly connected to the second circuit through other components such as resistors, etc.
Some shorthand reference numerals applied in embodiments of the present invention are explained first below.
Example one
Referring to fig. 2, fig. 2 is a schematic circuit diagram of an electronic device for a rechargeable battery according to an embodiment of the present invention, the electronic device includes a second charging circuit 202, a second discharging circuit 203, a second battery protection control circuit 205, and a second battery protection switch 206;
the second input end 201 is connected to the second charging circuit 202, the second charging circuit 202 is connected to one ends of the second discharging circuit 203 and the second battery protection switch 206, the other end of the second battery protection switch 206 is connected to the positive electrode of the second battery 204, the negative electrode of the second battery 204 is grounded, two input ends of the second battery protection control circuit 205 are connected to two ends of the second battery protection switch 206, the output end of the second battery protection control circuit 205 is connected to the second charging circuit 202, the second discharging circuit 203 and the second battery protection switch 206, and the second discharging circuit 203 is connected to the second output end 207.
Further, the second charging circuit 202 is a linear type charging circuit, a switch type charging circuit, or an impulse type charging circuit that can be turned off.
Further, the second discharge circuit 203 is a load that can be turned off; preferably, the closable load is a closable resistive load, a closable capacitive load or a closable inductive load.
Further, the second discharge circuit 203 is a power supply which can be turned off; preferably, the power supply that can be shut off is a linear type power supply (LDO) that can be shut off or a switching type power supply (DC/DC) that can be shut off and a pulse type power supply that can be shut off;
further, the second discharge circuit 203 includes a closable load and a closable power source, and it should be noted that the second discharge circuit 203 may be a combination of one or more closable loads and one or more closable power sources, and is not limited herein.
Further, the second battery protection switch 206 includes one or more PMOS transistors.
The specific circuit composition of the second battery protection control circuit 205 in this embodiment will be described in detail below, referring to fig. 3, fig. 3 is a schematic diagram of the battery protection control circuit according to an embodiment of the present invention, where the second battery protection control circuit 205 includes a battery power port VDD, an input power port VCC, a power detector 311, an overcharge detector 312, an overdischarge detector 313, a short circuit detector 314, an overcurrent detector 315, a charging state detector 316, a delay controller 317, a logic circuit 318, and a power supply circuit 319;
the power supply detector 311, the overcharge detector 312, the overdischarge detector 313, the short circuit detector 314, the overcurrent detector 315 and the charge state detector 316 are comparators;
the voltage dividing resistor collects voltage signals of VDD and VCC of the second battery protection control circuit 205, and sends the voltage signals of VDD and VCC to input terminals of the power supply detector 311, the overcharge detector 312, the overdischarge detector 313, the short-circuit detector 314, the overcurrent detector 315 and the charging state detector 316;
one input end of the power supply detector 311 is connected to the position a between the voltage-dividing resistors, the other input end of the power supply detector 311 is connected to one input end of the overcharge detector 312, and the output end of the power supply detector 311 is connected to the power supply circuit 319; the power detector 311 is used to determine whether the power supply circuit 319 selects VDD or VCC as the power supply source inside the electronic device for rechargeable batteries; the power supply circuit 319 is used for supplying a stable voltage and each reference voltage source to other circuits (the other circuits refer to the power source detector 311, the overcharge detector 312, the overdischarge detector 313, the short circuit detector 314, the overcurrent detector 315, the charge state detector 316, the delay controller 317 and the logic circuit 318);
the other input end of the overcharge detector 312 is connected to one input end of the overdischarge detector 313, and the overcharge detector is used for detecting the magnitude of the VDD voltage of the electronic device in a charging state;
the other input end of the over-discharge detector 313 is connected to the voltage-dividing resistor d, and the over-discharge detector is used for detecting the magnitude of the VDD voltage of the electronic device in a discharge state;
one input end of the short-circuit detector 314 is grounded, and the other input end of the short-circuit detector 314 is connected to the voltage dividing resistor c, and the short-circuit detector is used for detecting the voltage magnitude of the two ends of the battery protection switch;
one input end of the over-current detector 315 is grounded, and the other input end of the over-current detector 315 is connected to the divider resistor b;
one input terminal of the charge state detector 316 is grounded, and the other input terminal of the charge state detector 316 is connected to the second reference voltage port of the power supply circuit 319;
the output ends of the overcharge detector 312, the overdischarge detector 313, the short-circuit detector 314, the overcurrent detector 315, and the charge state detector 316 are all connected to a delay controller 317, the delay controller 317 is connected to a logic circuit 318, the delay controller 317 is configured to output a received processing signal to the logic circuit 318, the logic circuit 318 includes a first port OS, a second port OC, and a third port OD, the first port OS is configured to control the second battery protection switch 206, the second port OC is configured to control the second charge circuit 202, and the third port OD is configured to control the second discharge circuit 203.
Further, the second battery 204 is a rechargeable battery.
Further, the second battery protection switch 206 includes two PMOS transistors connected in series, which are the first PMOS transistor P respectively1A second PMOS transistor P2，
The first PMOS tube P1The drain electrode of the PMOS transistor is connected with a VCC end, and a first PMOS tube P1The source electrode of the PMOS tube P is connected with a second PMOS tube P2Source electrode of (1), first PMOS tube P1Is connected to the second battery protection control circuit 205;
the second PMOS tube P2Is connected to the anode of the second battery 204, and a second PMOS transistor P2Is also connected to the second battery protection control circuit 205.
Further, the electronic device further includes an RC filter network 301, where one end of the RC filter network 301 is connected to the second battery protection control circuit 205, and the other end is connected to the second battery 204.
The operation principle of the electronic device for a rechargeable battery in the present embodiment will be described below.
Referring to fig. 3 and 4, when the electronic device is operated, first, the charging state detector 316 applies the input power port VCC and the second reference voltage U of the second battery protection control circuit 20502Comparing and judging the magnitude of the VCC voltage value; the determination result is sequentially input to the delay controller 317 and the logic circuit 318, and the logic circuit 318 controls whether the electronic device is to be discharged or charged according to the determination result;
it should be noted that the first reference voltage U output by the power supply circuit 31901A second reference voltage U02All of which are preset fixed voltage values, the values of the first and second reference voltages being different, e.g. the first reference voltage U01May be 1.25V, the first reference voltage U01Input signals of the overcharge detector 312 and the overdischarge detector 313; second reference voltage U02May be 2.5V, the second reference voltage U02Is an input signal to the state of charge detector 316.
Specifically, when the external input voltage of the charging device externally connected to the second input terminal 201 is higher than the voltage of the second battery 204, the second input terminal 201 receives the external input voltage and transmits the external input voltage to the second charging circuit 202, and at this time, the second charging circuit 202 is in a conducting state; in addition, the external input voltage is also transmitted to the VCC port of the second battery protection control circuit 205 through the second charging circuit 202, and when the second battery protection control circuit 205 detects that the VCC voltage is higher than the second reference voltage, the first port OS of the logic circuit 318 controls the second battery protection switch 206 to be turned on, the second port OC controls the second charging circuit 202 to be turned on, and the third port OD controls the second discharging circuit 203 to be turned off, at this time, the external charging device can charge the second charging battery 204.
When the second output terminal 207 is connected to an external load device, the second battery protection control circuit 205 detects that the VCC voltage is lower than the second reference voltage U02Then, the first port OS of the logic circuit 318 controls the second battery protection switch 206 to be turned on, the second port OC controls the second charging circuit 202 to be turned off, and the third port OD controls the second discharging circuit 203 to be turned on, at this time, the second charging battery 204 can supply power to the external load device.
In addition, the second battery protection control circuit 205 detects the charge/discharge state of the second battery 204 and the voltage values of VDD and VCC of the electronic device to determine whether the electronic device is abnormal, and if the electronic device is abnormal, the second battery protection control circuit can send a control command to an external device;
specifically, in the charging state of the electronic device, when the VDD voltage is not less than the preset overcharge threshold voltage (for example, the preset overcharge threshold voltage is 4.28V), the overcharge detector 312 starts to trigger and sends a trigger signal to the delay controller 317 and the logic circuit 318 in sequence, then the first port OS controls the second battery protection switch 206 to be turned off, and the second port OC controls the second charging circuit 202 to be turned off, so as to cut off the second charging circuit 202.
In a discharging state of the electronic device, when the VDD voltage is less than a preset over-discharge threshold voltage (for example, the preset over-discharge threshold voltage value is 2.3V), the over-discharge detector 313 in the second battery protection control circuit 205 starts to trigger and sequentially sends a trigger signal to the delay controller 317 and the logic circuit 318, then the first port OS controls the second battery protection switch 206 to be turned off, and the third port OD controls the second discharging circuit 203 to be turned off, so as to cut off the second discharging circuit 203;
when the VDD voltage is less than the preset over-discharge threshold voltage, there are two cases, respectively as follows:
the first condition is as follows: if the voltage across the second battery protection switch 206 is smaller than the first preset voltage value, the over-current detector 315 sequentially sends the trigger signals to the logic circuit 318, the logic circuit 318 controls the second discharging circuit 203 to be turned off, and the electronic device enters an over-current protection state;
specifically, the discharge current of the electronic device passes through the first PMOS transistor P1A second PMOS transistor P2When the voltage difference between the VDD voltage and the VCC voltage of the voltage is greater than a first preset voltage value, the overcurrent detector 315 starts triggering, and sends a trigger signal to the delay controller 317 and the logic circuit 318 in sequence, so that the third port OD controls the second discharge circuit 203 to be turned off, the second discharge circuit 203 is cut off, and the whole electronic device enters an overcurrent protection state; the first preset voltage value in this embodiment may be 0.1V.
Case two: if the voltage across the second battery protection switch 206 is greater than or equal to the second preset voltage value, the short-circuit detector 314 sequentially sends the trigger signals to the logic circuit 318, and the logic circuit 318 controls the second discharging circuit 203 to be turned off, so that the electronic device enters a short-circuit protection state;
specifically, the discharge current of the electronic device passes through the first PMOS transistor P1A second PMOS transistor P2When the voltage difference is generated, the first PMOS transistor P is instantaneously in1A second PMOS transistor P2When the voltage difference generated between the two ends of the capacitor is larger than a second preset voltage value,the short-circuit detector 314 will trigger immediately, and the third port OD controls the second discharging circuit 203 to close, so as to cut off the second discharging circuit 203, and the whole electronic device enters a short-circuit protection state; the second preset voltage value in this embodiment may be 0.2V, and the second preset voltage value is greater than the first preset voltage value.
Example two
The difference between the present embodiment and the first embodiment is: a first power path management circuit 403 is added between an input terminal and an output terminal of the electronic device for rechargeable batteries, one end of the first power path management circuit 403 is connected to the input terminal of the charging circuit, and the other end of the first power path management circuit 403 is connected to the output terminal of the discharging circuit.
Further, referring to fig. 4, the charging circuit and the discharging circuit may be integrated into one circuit to form a charging/discharging circuit.
Further, the first power path management circuit 403 may be a unidirectional switch circuit with under/over voltage protection and over current protection, or may be a diode with low conduction voltage drop.
If the third input terminal 401 in this embodiment is connected to an external input voltage of an external charging device, and the third output terminal 402 is not connected to an external load device, the charging operation principle of the electronic device is substantially the same as that described in the first embodiment, and details thereof are not repeated herein;
or if the third input terminal 401 in this embodiment is not connected to the external input voltage of the external charging device, and the third output terminal 402 is connected to the external load device, the discharging operation principle of the electronic apparatus is substantially the same as that described in the first embodiment, and details thereof are not repeated herein.
The addition of the first power path management circuit 403 to the electronic device has the following advantages:
when the third input terminal 401 is connected to an external input voltage of an external charging device and the third output terminal 402 is simultaneously connected to an external load device, the third battery protection control circuit 405 may control the first power path management circuit 403, the first charging/discharging circuit 404, and the third battery protection switch 406 to be turned on and off, so that the third input terminal 401 may provide power to the third output terminal 402 through the first power path management circuit 403, and the third input terminal 401 may charge the third battery 407.
EXAMPLE III
Fig. 5 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a third embodiment of the present invention; referring to fig. 5, the electronic device includes a first integrated circuit 510, a fourth battery protection switch 502, and a fourth battery 503;
the first integrated circuit 510 is grounded, and the first integrated circuit 510 is respectively connected to the fourth input terminal 501, the fourth battery protection switch 502, the fourth battery 503 and the fourth output terminal 504; the fourth battery protection switch 502 is connected to the positive electrode of the fourth battery 503, and the negative electrode of the fourth battery 503 is grounded;
the first integrated circuit 510 includes a fourth charging circuit 511, a fourth discharging circuit 512, and a fourth battery protection control circuit 513, and the circuit connection relationship of these three circuits (i.e., the fourth charging circuit 511, the fourth discharging circuit 512, and the fourth battery protection control circuit 513) is substantially the same as that of the second charging circuit 202, the second discharging circuit 203, and the second battery protection control circuit 205 in the first embodiment, and is not described herein again.
Example four
Fig. 6 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a fourth embodiment of the present invention; referring to fig. 6, the electronic device includes a fifth battery protection switch 603, a fifth battery 604, and a second integrated circuit 610;
the second integrated circuit 610 is grounded, the second integrated circuit 610 is respectively connected to a fifth input terminal 601, a fifth output terminal 602, a fifth battery protection switch 603 and a fifth battery 604, the fifth battery protection switch 603 is connected to the positive electrode of the fifth battery 604, and the negative electrode of the fifth battery 604 is grounded;
the second integrated circuit 610 includes a second power path management circuit 611, a second charging/discharging circuit 612, and a fifth battery protection control circuit 613, and the circuit connection relationships of the three circuits (i.e., the second power path management circuit 611, the second charging/discharging circuit 612, and the fifth battery protection control circuit 613) are substantially the same as the first power path management circuit 403, the first charging/discharging circuit 404, and the third battery protection control circuit 405 in the first embodiment, which is not described herein again.
EXAMPLE five
Fig. 7 is a schematic circuit diagram of an electronic device for a rechargeable battery according to a fifth embodiment of the present invention, referring to fig. 7, the electronic device includes a third power path management circuit 703, a sixth battery protection switch 704, a sixth battery 705 and a third integrated circuit 710;
two ends of the third power path management circuit 703 are connected to a sixth input terminal 701 and a sixth output terminal 702, respectively; the third integrated circuit 710 is grounded, the third integrated circuit 710 is respectively connected to the third power path management circuit 703, the sixth battery protection switch 704 and the sixth battery 705, the sixth battery protection switch 704 is connected to the positive pole of the sixth battery 705, and the negative pole of the sixth battery 705 is grounded;
wherein the third integrated circuit 710 includes a third charge/discharge circuit 711 and a sixth battery protection control circuit 712; the circuit connection relationship of the third power path management circuit 703, the third charge/discharge circuit 711, and the sixth battery protection control circuit 712 is substantially the same as that of the first power path management circuit 403, the first charge/discharge circuit 404, and the third battery protection control circuit 405 in the first embodiment, and is not repeated here.
It should be noted that, those skilled in the art can also combine other circuit modules of the present invention to form different integrated circuits, and the above embodiments one to six are only examples, and the present invention can also have other various embodiments, that is, the electronic device for rechargeable battery of the present invention can be connected separately, and can be integrated partially or completely in one circuit.
The utility model has the advantages that:
the utility model can use a PMOS tube to complete the function of the battery protection switch, and has high reliability; in addition, the circuits with a plurality of functions can be integrated together, so that the integration level of the electronic device is higher, and the use cost of a user is reduced.
Only those elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware or in a combination of computer software and electronic hardware as would be recognized by one of ordinary skill in the art. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An electronic device for a rechargeable battery, comprising a charging circuit, a discharging circuit, a battery protection control circuit and a battery protection switch;
one end of the charging circuit is connected with the input end, and the other end of the charging circuit is connected with the discharging circuit and the battery protection switch; the battery protection switch is connected with the battery;
the input end of the battery protection control circuit is connected to the battery protection switch, the output end of the battery protection control circuit is connected to the charging circuit, the discharging circuit and the battery protection switch, and the discharging circuit is connected to the output end.
2. The electronic device of claim 1, wherein the battery protection control circuit comprises a power supply detector, a state of charge detector, a logic circuit, and a power supply circuit;
the output end of the power supply detector is connected with the power supply circuit;
the input ends of the power supply detector and the charging state detector are connected between voltage dividing resistors of the battery protection control circuit;
the output end of the charging state detector is connected with the logic circuit.
3. The electronic device of claim 2, wherein the logic circuit comprises a first port for controlling the turn-on or turn-off of the battery protection switch, a second port for controlling the turn-on or turn-off of the charging circuit, and a third port for controlling the turn-on or turn-off of the discharging circuit.
4. The electronic device of claim 1, further comprising a power path management circuit, wherein one end of the power path management circuit is connected to the charging circuit, and the other end of the power path management circuit is connected to the discharging circuit.
5. The electronic device of claim 4, wherein the power path management circuit is a unidirectional switching circuit with under/over voltage protection and over current protection or a diode with low turn-on voltage drop.
6. The electronic device of claim 1, wherein the battery protection control circuit further comprises an overcharge detector, an overdischarge detector, a short-circuit detector and an overcurrent detector, wherein the input ends of the overcharge detector, the overdischarge detector, the short-circuit detector and the overcurrent detector are connected between voltage-dividing resistors of the battery protection control circuit, and the output ends of the overcharge detector, the overdischarge detector, the short-circuit detector and the overcurrent detector are connected with the logic circuit.
7. The electronic device according to claim 1, wherein the charging circuit is a linear type charging circuit, a switch type charging circuit, or an impulse type charging circuit that can be turned off.
8. The electronic device of claim 1, wherein the discharge circuit is a load that can be shut off or a power source that can be shut off.
9. The electronic device of claim 1, wherein the battery protection switch comprises one or more PMOS transistors.
10. The electronic device according to any of claims 1-9, wherein the charging circuit, the discharging circuit, the battery protection control circuit, the battery protection switch, and the power path management circuit are partially or entirely integrated in one circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020137049.2U CN211377645U (en) | 2020-01-21 | 2020-01-21 | Electronic device for rechargeable battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020137049.2U CN211377645U (en) | 2020-01-21 | 2020-01-21 | Electronic device for rechargeable battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211377645U true CN211377645U (en) | 2020-08-28 |
Family
ID=72152495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020137049.2U Active CN211377645U (en) | 2020-01-21 | 2020-01-21 | Electronic device for rechargeable battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211377645U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162587A (en) * | 2020-01-21 | 2020-05-15 | 无锡市晶源微电子有限公司 | Electronic device for rechargeable battery |
-
2020
- 2020-01-21 CN CN202020137049.2U patent/CN211377645U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162587A (en) * | 2020-01-21 | 2020-05-15 | 无锡市晶源微电子有限公司 | Electronic device for rechargeable battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212543359U (en) | Single-wafer battery protection circuit, battery charging and discharging circuit and portable electronic equipment | |
| US11646569B2 (en) | Secondary battery protection circuit, secondary battery protection apparatus and battery pack | |
| US7990108B2 (en) | Charge detector | |
| US20200153261A1 (en) | Charge/discharge switch control circuits for batteries | |
| CN106169782B (en) | Battery protection integrated circuit, battery protection device and battery pack | |
| US6329796B1 (en) | Power management circuit for battery systems | |
| WO2016119694A1 (en) | Battery protection circuit, electrical energy providing device and electronic device | |
| US10622819B2 (en) | Rechargeable battery protection integrated circuit, rechargeable battery protection device, and battery pack | |
| US10749358B2 (en) | Rechargeable battery protection integrated circuit, rechargeable battery protection device, and battery pack | |
| KR100777884B1 (en) | A charge/discharge control circuit and a charging-type power-supply unit | |
| JP7039773B2 (en) | Power system including battery pack | |
| US20230282895A1 (en) | Secondary battery protection apparatus and battery pack | |
| WO2013108336A1 (en) | Secondary battery protection circuit, battery pack, and electronic apparatus | |
| KR102586102B1 (en) | Battery protection circuit and battery pack including same | |
| CN112583079A (en) | Battery protection circuit and device | |
| CN111162587A (en) | Electronic device for rechargeable battery | |
| CN211377645U (en) | Electronic device for rechargeable battery | |
| CN116937740A (en) | Battery protection circuit, battery protection method, battery pack and electric tool | |
| CN215990263U (en) | Integrated circuit and system for battery charging and discharging protection | |
| KR100389163B1 (en) | Battery voltage detection circuit | |
| JP2022041966A (en) | Battery protection circuit and battery device including the same | |
| JP2020198773A (en) | Secondary battery protection circuit, secondary battery protection apparatus, battery pack, and secondary battery protection circuit control method | |
| CN211377638U (en) | Charging and discharging protection circuit for multiple batteries | |
| CN110095646B (en) | Negative pressure detection circuit and battery protection circuit | |
| CN219576684U (en) | Charge-discharge control circuit, power management chip and power equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 5, Xijin Road, Xinwu District, Wuxi City, Jiangsu Province, 214028 Patentee after: Wuxi Jingyuan Microelectronics Co.,Ltd. Address before: Room 209, building a, block 106-c, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province, 214028 Patentee before: Wuxi Jingyuan Microelectronics Co.,Ltd. |