CN211908400U - Charging circuit and battery - Google Patents
Charging circuit and battery Download PDFInfo
- Publication number
- CN211908400U CN211908400U CN202020261892.1U CN202020261892U CN211908400U CN 211908400 U CN211908400 U CN 211908400U CN 202020261892 U CN202020261892 U CN 202020261892U CN 211908400 U CN211908400 U CN 211908400U
- Authority
- CN
- China
- Prior art keywords
- module
- battery
- current limiting
- charging circuit
- limiting unit
- 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)
Abstract
The utility model is suitable for the technical field of electronics, and discloses a charging circuit and a battery, wherein the charging circuit comprises a switch module, a current-limiting module and a one-way conduction module; the first end of the switch module is connected with the anode of the battery to be charged, the second end of the switch module is connected with the output end of the external power supply, and the switch module is used for keeping off when the output voltage of the anode of the battery to be charged is smaller than the preset voltage and keeping on when the output voltage of the anode of the battery to be charged is not smaller than the preset voltage; the first end of the current limiting module is connected with the output end of an external power supply, and the second end of the current limiting module is connected with the input end of the one-way conduction module; the output end of the one-way conduction module is connected with the anode of the battery to be charged. The utility model discloses can realize charging at the initial stage undercurrent of battery charging, the influence of charging to the battery can be reduced to the later stage heavy current charging, the protection battery, the life of extension battery.
Description
Technical Field
The utility model belongs to the technical field of the electron, especially, relate to a charging circuit and battery.
Background
Batteries, particularly lithium batteries, are widely used in various fields. The lithium battery is a rechargeable battery. At present, in order to reduce the charging time, the lithium battery is charged by adopting a quick charging mode, but some lithium batteries have high energy ratio, and if the lithium batteries directly enter the quick charging mode, the batteries are easily damaged, and the service life of the batteries is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a charging circuit and a battery to solve the problem that the battery is easily damaged and the service life of the battery is affected in the prior art.
A first aspect of an embodiment of the present invention provides a charging circuit, including a switch module, a current limiting module, and a unidirectional conducting module;
the first end of the switch module is connected with the anode of the battery to be charged, the second end of the switch module is connected with the output end of the external power supply, and the switch module is used for keeping off when the output voltage of the anode of the battery to be charged is smaller than the preset voltage and keeping on when the output voltage of the anode of the battery to be charged is not smaller than the preset voltage;
the first end of the current limiting module is connected with the output end of the external power supply, and the second end of the current limiting module is connected with the input end of the unidirectional conduction module;
and the output end of the one-way conduction module is connected with the anode of the battery to be charged.
Optionally, the current limiting module comprises a first current limiting unit and a second current limiting unit;
the first end of the first current limiting unit is connected with the first end of the current limiting module, and the second end of the first current limiting unit is connected with the first end of the second current limiting unit;
and the second end of the second current limiting unit is connected with the second end of the current limiting module.
Optionally, the second current limiting unit comprises a thermistor;
and the first end of the thermistor is connected with the first end of the second current limiting unit, and the second end of the thermistor is connected with the second end of the second current limiting unit.
Optionally, the thermistor is a positive temperature coefficient thermistor.
Optionally, the first current limiting unit includes a first resistor and a second resistor;
the first end of the first resistor and the first end of the second resistor, which are connected in parallel, are connected with the first end of the first current limiting unit, and the second end of the first resistor and the second resistor, which are connected in parallel, are connected with the second end of the first current limiting unit.
Optionally, the switch module comprises a relay;
and the first end of the relay is connected with the first end of the switch module, and the second end of the relay is connected with the second end of the switch module.
Optionally, the unidirectional conducting module comprises a diode;
and the anode of the diode is connected with the input end of the unidirectional conduction module, and the cathode of the diode is connected with the output end of the unidirectional conduction module.
Optionally, the charging circuit further comprises a third resistor;
and the first end of the third resistor is connected with the negative electrode of the battery to be charged, and the second end of the third resistor is grounded.
A second aspect of the embodiments of the present invention provides a battery, including the first aspect of the charging circuit.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the utility model discloses a charging circuit passes through current-limiting module and one-way conduction module and realizes that the undercurrent charges, realizes the undercurrent through switch module and charges and the switching that the heavy current charges, when switch module disconnection, realizes that the undercurrent charges, when switch module closure, realizes that the heavy current charges, can realize charging the undercurrent at the initial stage of battery charging and charge, and the later stage heavy current charges, can reduce the influence of charging to the battery, the protection battery prolongs the life of battery.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a charging circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a charging circuit according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
Referring to fig. 1, a charging circuit 10 provided in this embodiment includes a switch module 11, a current limiting module 12, and a unidirectional conducting module 13;
the first end of the switch module 11 is connected with the anode BAT + of the battery to be charged, the second end of the switch module is connected with the external power output end BAT1+, the switch module is used for keeping off when the output voltage of the anode BAT + of the battery to be charged is smaller than the preset voltage, and keeping on when the output voltage of the anode BAT + of the battery to be charged is not smaller than the preset voltage;
a current limiting module 12, a first end of which is connected to an external power output terminal BAT1+, and a second end of which is connected to an input terminal of the unidirectional conducting module 13;
the output end of the unidirectional conduction module 13 is connected with the positive electrode BAT + of the battery to be charged.
The embodiment of the utility model provides an in, when treating that rechargeable battery's anodal BAT + output voltage is less than preset voltage, that is to say, when treating that rechargeable battery needs undercurrent to charge, switch module 11 keeps the disconnection, and external power source passes through current-limiting module 12 and the one-way module 13 that switches on and charges for treating rechargeable battery undercurrent, reaches the purpose of precharging, protection battery. After the low current of the battery to be charged is charged for a period of time, the output voltage of the anode is greater than or equal to the preset voltage, at this time, the switch module 11 is closed, and the external power supply charges the battery to be charged through the switch module 11 for high current, so that the purpose of quick charging is achieved.
Wherein the impedance of the current limiting module 12 is greater than the impedance of the switching module 11. The preset voltage may be set according to actual requirements, and is not specifically limited herein. The external power supply output BAT1+ may be a charger output.
According to the above description, the utility model discloses a charging circuit passes through current-limiting module 12 and the one-way switch-on module 13 realizes that the undercurrent charges, realizes the undercurrent through switch module 11 and charges and the switching that the heavy current charges, when switch module 11 disconnection, realizes that the undercurrent charges, when switch module 11 is closed, realizes that the heavy current charges, can realize charging the undercurrent at the battery initial stage and charge, the heavy current of later stage charges, can reduce the influence of charging to the battery, the protection battery, the life of extension battery.
In one embodiment of the present invention, referring to fig. 2, the current limiting module 12 includes a first current limiting unit 121 and a second current limiting unit 122;
a first current limiting unit 121 having a first end connected to a first end of the current limiting module 12 and a second end connected to a first end of the second current limiting unit 122;
a second end of the second current limiting unit 122 is connected to a second end of the current limiting module 12.
In one embodiment of the present invention, referring to fig. 2, the second current limiting unit 122 includes a thermistor PTC 1;
and a thermistor PTC1 having a first terminal connected to a first terminal of the second current limiting unit 122 and a second terminal connected to a second terminal of the second current limiting unit 122.
In one embodiment of the present invention, the thermistor PTC1 is a Positive Temperature Coefficient (PTC) thermistor.
The PTC thermistor has a resistance value that increases with an increase in temperature, and a charging current that decreases. The PTC thermistor can be used for batteries under different working conditions, the charging current is not too large, the batteries are not damaged, and the pre-charging effect cannot be achieved. The PTC thermistor can achieve a good pre-charging effect, so that the battery is protected, and the service life of the battery is prolonged.
In an embodiment of the present invention, referring to fig. 2, the first current limiting unit 121 includes a first resistor R42 and a second resistor R43;
a first end of the first resistor R42 connected in parallel with the second resistor R43 is connected to a first end of the first current limiting unit 121, and a second end of the first resistor R42 connected in parallel with the second resistor R43 is connected to a second end of the first current limiting unit 121.
The first current limiting unit 121 may also be a resistor, or a plurality of resistors connected in parallel or in series, and is not limited in this respect.
In an embodiment of the present invention, referring to fig. 2, the switch module 11 comprises a relay K;
and a relay K, the first end of which is connected with the first end of the switch module 11, and the second end of which is connected with the second end of the switch module 11.
In an embodiment of the present invention, referring to fig. 2, the unidirectional conducting module 13 includes a diode D2;
and the anode of the diode D2 is connected with the input end of the unidirectional conduction module 13, and the cathode of the diode D2 is connected with the output end of the unidirectional conduction module 13.
In an embodiment of the present invention, referring to fig. 2, the charging circuit further includes a third resistor RS;
and a first end of the third resistor RS is connected with a negative electrode BAT-of the battery to be charged, and a second end of the third resistor RS is grounded GND.
In the embodiment of the present invention, when the output voltage of the positive electrode of the battery to be charged is small, the relay K is in the off state, and the external power output terminal BAT1+ charges the battery to be charged through the pre-charging circuit (the current limiting module 12 and the unidirectional conducting module 13); when charging to the time of can heavy current charging, closed relay K, external power supply output BAT1+ charges for waiting rechargeable battery through relay K, realizes that the heavy current charges, can reach better preliminary filling effect, protects the battery, prolongs the life of battery, and the circuit is simple.
Further, corresponding to the charging circuit 10 in the above embodiment, the present embodiment provides a battery including the charging circuit 10 as described in any of the above embodiments, having the same technical effects as the charging circuit 10 described above.
For a detailed description of the charging circuit 10, reference may be made to the detailed description of the above-mentioned operation principle, which is not repeated herein.
Optionally, referring to fig. 2, the battery may further include a fuse F1 for overcurrent protection.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. 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.
In the embodiments provided in the present disclosure, it should be understood that the disclosed system and method may be implemented in other manners. For example, the above-described system embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A charging circuit is characterized by comprising a switch module, a current limiting module and a one-way conduction module;
the first end of the switch module is connected with the anode of the battery to be charged, the second end of the switch module is connected with the output end of the external power supply, and the switch module is used for keeping off when the output voltage of the anode of the battery to be charged is smaller than the preset voltage and keeping on when the output voltage of the anode of the battery to be charged is not smaller than the preset voltage;
the first end of the current limiting module is connected with the output end of the external power supply, and the second end of the current limiting module is connected with the input end of the unidirectional conduction module;
and the output end of the one-way conduction module is connected with the anode of the battery to be charged.
2. The charging circuit of claim 1, wherein the current limiting module comprises a first current limiting unit and a second current limiting unit;
the first end of the first current limiting unit is connected with the first end of the current limiting module, and the second end of the first current limiting unit is connected with the first end of the second current limiting unit;
and the second end of the second current limiting unit is connected with the second end of the current limiting module.
3. The charging circuit of claim 2, wherein the second current limiting unit comprises a thermistor;
and the first end of the thermistor is connected with the first end of the second current limiting unit, and the second end of the thermistor is connected with the second end of the second current limiting unit.
4. The charging circuit of claim 3, wherein the thermistor is a positive temperature coefficient thermistor.
5. The charging circuit of claim 2, wherein the first current limiting unit comprises a first resistor and a second resistor;
the first end of the first resistor and the first end of the second resistor, which are connected in parallel, are connected with the first end of the first current limiting unit, and the second end of the first resistor and the second resistor, which are connected in parallel, are connected with the second end of the first current limiting unit.
6. The charging circuit of claim 1, wherein the switching module comprises a relay;
and the first end of the relay is connected with the first end of the switch module, and the second end of the relay is connected with the second end of the switch module.
7. The charging circuit of claim 1, wherein the unidirectional conducting module comprises a diode;
and the anode of the diode is connected with the input end of the unidirectional conduction module, and the cathode of the diode is connected with the output end of the unidirectional conduction module.
8. The charging circuit according to any one of claims 1 to 7, further comprising a third resistor;
and the first end of the third resistor is connected with the negative electrode of the battery to be charged, and the second end of the third resistor is grounded.
9. A battery comprising a charging circuit as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020261892.1U CN211908400U (en) | 2020-03-05 | 2020-03-05 | Charging circuit and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020261892.1U CN211908400U (en) | 2020-03-05 | 2020-03-05 | Charging circuit and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211908400U true CN211908400U (en) | 2020-11-10 |
Family
ID=73301192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020261892.1U Active CN211908400U (en) | 2020-03-05 | 2020-03-05 | Charging circuit and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211908400U (en) |
-
2020
- 2020-03-05 CN CN202020261892.1U patent/CN211908400U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110365074B (en) | Battery, terminal and charging system | |
| CN112072727A (en) | Battery pack balance control system and control method thereof | |
| CN109245245A (en) | A kind of reverse-charge prevention circuit and battery management system of battery | |
| CN114497817A (en) | Battery and heating method thereof | |
| CN110571488A (en) | Battery and automobile diagnosis panel | |
| CN112311038A (en) | Charging and discharging protection circuit, terminal equipment and battery discharging control method | |
| CN112332526B (en) | Storage battery energy storage system and control method thereof | |
| CN211908400U (en) | Charging circuit and battery | |
| CN211790810U (en) | Charging system, charger, battery pack and movable platform | |
| CN201298735Y (en) | Lithium-ion battery protection device and an application device thereof | |
| CN209250277U (en) | A kind of reverse-charge prevention circuit and battery management system of battery | |
| CN109120039A (en) | A kind of charged in parallel and separate inductor equalizing circuit and its control method | |
| CN2938522Y (en) | Overload protection circuit of power lithium ion battery | |
| CN213093258U (en) | Battery system and battery system group | |
| CN213185553U (en) | Battery pack protection circuit and battery device | |
| CN214045103U (en) | Wearable electronic equipment battery protection circuit | |
| CN111293755B (en) | Protection circuit for equalizing discharge of parallel battery pack and chargeable device | |
| CN214314601U (en) | Battery pack hot plug circuit system and battery parallel circuit | |
| CN211320982U (en) | Charging and discharging circuit and electronic equipment | |
| CN209402183U (en) | Afterflow device and unmanned aerial vehicle power supply system | |
| CN210608617U (en) | Lithium battery protection board circuit of double current detection circuits | |
| CN209497259U (en) | Battery protecting circuit | |
| CN112147517B (en) | Battery pack detection device and system | |
| CN110266068B (en) | High-voltage battery control circuit, control method and storage medium | |
| CN210350810U (en) | Power supply charging protection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |