CN220368482U - Battery charge-discharge protection circuit - Google Patents
Battery charge-discharge protection circuit Download PDFInfo
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- CN220368482U CN220368482U CN202320919763.0U CN202320919763U CN220368482U CN 220368482 U CN220368482 U CN 220368482U CN 202320919763 U CN202320919763 U CN 202320919763U CN 220368482 U CN220368482 U CN 220368482U
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- 239000003990 capacitor Substances 0.000 claims description 20
- 238000012544 monitoring process Methods 0.000 abstract description 4
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- 238000006467 substitution reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
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Abstract
The application provides a battery charge-discharge protection circuit, which comprises a charge control module, a discharge control module, a control module and a power module, wherein the control module is respectively connected with the charge control module and the discharge control module; the charging control module is connected with the discharging control module, and the power supply module is respectively connected with the charging control module and the discharging control module. According to the method, the charging and discharging monitoring of the battery voltage is achieved through the hardware module for charging and discharging control, and charging and discharging safety is guaranteed.
Description
Technical Field
The application relates to the technical field of battery charge and discharge protection, in particular to a battery charge and discharge protection circuit.
Background
At present, the over-charge and over-discharge of the battery voltage are controlled to turn off the MOS device by detecting voltage software, but the voltage software is easy to be out of control, so that the control protection is invalid, and the risk of over-discharge or over-charge of the battery is increased.
Disclosure of Invention
In view of this, the present application aims at providing at least a battery charge-discharge protection circuit, which realizes charge-discharge monitoring of battery voltage by introducing a hardware module for charge-discharge control, and ensures charge-discharge safety.
The application mainly comprises the following aspects:
in a first aspect, an embodiment of the present application provides a battery charge-discharge protection circuit, where the battery charge-discharge protection circuit includes a charge control module, a discharge control module, a control module, and a power module, where the control module is connected with the charge control module and the discharge control module respectively; the charging control module is connected with the discharging control module, and the power supply module is respectively connected with the charging control module and the discharging control module.
In one possible implementation manner, the battery charge-discharge protection circuit further comprises a first resistor and a circuit protection module, wherein one end of the first resistor is connected with the discharge control module, and the other end of the first resistor is connected with one end of the circuit protection module; the other end of the circuit protection module is connected with the positive electrode of the power supply module.
In one possible embodiment, the charge control module comprises a first charge control unit, a second charge control unit and a third charge control unit, wherein the first charge control unit is connected to the second charge control unit, the second charge control unit is further connected to the third charge control unit, and the third charge control unit is further connected to the discharge control module.
In one possible implementation manner, the first charging control unit comprises a second resistor, a third resistor and a first control switch, wherein one end of the second resistor is connected with the control module, the other end of the second resistor is respectively connected with one end of the third resistor and a third connecting end of the first control switch, the other end of the third resistor and the first connecting end of the first control switch are respectively connected with a negative electrode of the power module and then connected to the ground, and the second connecting end of the first control switch is connected with the second charging control unit.
In one possible implementation manner, the second charging control unit comprises a second control switch, a third control switch, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and a first diode, wherein a first connection end of the second control switch is connected with a second connection end of the first control switch, a second connection end of the second control switch is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the third charging control unit, and a third connection end of the second control switch is respectively connected with a second connection end of the third control switch and one end of the fifth resistor; the third connecting end of the third control switch is connected with one end of the sixth resistor and one end of the seventh resistor respectively, and the first connecting end of the third control switch is connected with the other end of the sixth resistor and then connected with the negative electrode of the power supply module to be connected with the ground; the other end of the seventh resistor is connected with the positive electrode of the first diode, and the negative electrode of the first diode and the other end of the fourth resistor are respectively connected with the third charging control unit.
In one possible implementation manner, the third charging control unit comprises a fourth control switch, an eighth resistor and a first capacitor, wherein a first connection end of the fourth control switch is respectively connected with one end of the eighth resistor, one end of the first capacitor, a cathode of the first diode, the other end of the fourth resistor and an external charging and discharging device; the second connecting end of the fourth control switch is connected to the discharging control module, and the third connecting end of the fourth control switch is connected with the other end of the eighth resistor, the other end of the first capacitor and the other end of the fourth resistor respectively.
In one possible embodiment, the discharge control module comprises a first discharge control unit, a second discharge control unit and a third discharge control unit, wherein the first discharge control unit is connected to the second discharge control unit, and the second discharge control unit is further connected to the third discharge control unit.
In one possible implementation manner, the first discharge control unit comprises a ninth resistor, a tenth resistor and a fifth control switch, wherein one end of the ninth resistor is connected with the control module, and the other end of the ninth resistor is respectively connected with one end of the tenth resistor and a third connection end of the fifth control switch; the other end of the tenth resistor is connected with the first connecting end of the fifth control switch, then connected with the negative electrode of the power module, and grounded, and the second connecting end of the fifth control switch is connected with the second discharge control unit.
In one possible embodiment, the second discharge control unit includes a sixth control switch, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a second diode, wherein a first connection terminal of the sixth control switch is connected to a second connection terminal of the fifth control switch, the second connection terminal of the sixth control switch is connected to one terminal of the eleventh resistor, and a third connection terminal of the sixth control switch is connected to one terminal of the twelfth resistor and one terminal of the thirteenth resistor, respectively; the other end of the thirteenth resistor is connected with the anode of the power supply module and then grounded, the other end of the thirteenth resistor is connected with the anode of the second diode, and the anode of the second diode is connected with the third discharge control unit; the other end of the eleventh resistor is connected to the third discharge control unit.
In one possible implementation manner, the third discharging control unit comprises a seventh control switch, a fourteenth resistor and a second capacitor, wherein a first connection end of the seventh control switch is respectively connected with one end of the fourteenth resistor, one end of the second capacitor and one end of the first resistor in the battery charging and discharging protection circuit, and a second connection end of the seventh control switch is connected with a second connection end of the fourth control switch in the charging control module; the third connecting end of the seventh control switch is respectively connected with the other end of the fourteenth resistor, the other end of the second capacitor and the other end of the eleventh resistor.
The battery charge and discharge protection circuit comprises a charge control module, a discharge control module, a control module and a power module, wherein the control module is respectively connected with the charge control module and the discharge control module; the charging control module is connected with the discharging control module, and the power supply module is connected with the discharging control module. According to the method, the charging and discharging monitoring of the battery voltage is achieved through the hardware module for charging and discharging control, and charging and discharging safety is guaranteed.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of a battery charge-discharge protection circuit according to an embodiment of the present disclosure;
fig. 2 shows a second schematic structural diagram of a battery charge-discharge protection circuit according to an embodiment of the present disclosure;
fig. 3 shows a schematic structural diagram of a battery charge-discharge protection circuit according to an embodiment of the present disclosure;
fig. 4 shows a schematic structural diagram of a battery charge-discharge protection circuit according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the accompanying drawings in the present application are only for the purpose of illustration and description, and are not intended to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. A flowchart, as used in this application, illustrates operations implemented according to some embodiments of the present application. It should be appreciated that the operations of the flow diagrams may be implemented out of order and that steps without logical context may be performed in reverse order or concurrently. Moreover, one or more other operations may be added to the flow diagrams and one or more operations may be removed from the flow diagrams as directed by those skilled in the art.
In addition, the described embodiments are only some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.
At present, the over-charge and over-discharge of the battery voltage are controlled to turn off the MOS device by detecting voltage software, but the voltage software is easy to be out of control, so that the control protection is invalid, and the risk of over-discharge or over-charge of the battery is increased.
Based on this, the embodiment of the application provides a battery charge-discharge protection circuit, through introducing the hardware module of charge-discharge control, realizes the charge-discharge monitoring to battery voltage, guarantees charge-discharge safety, and is specific as follows:
referring to fig. 1, fig. 1 shows a schematic diagram of a battery charge-discharge protection circuit according to an embodiment of the present application. As shown in fig. 1, the battery charge-discharge protection circuit provided in the embodiment of the present application includes a charge control module 1, a discharge control module 2, a control module 3, and a power module 4.
The control module 3 is connected with the charging control module 1 and the discharging control module 2 respectively, the charging control module 1 is connected with the discharging control module 2, and the power supply module 4 is connected with the discharging control module 2.
Referring to fig. 2, fig. 2 shows a schematic diagram of a battery charge-discharge protection circuit according to an embodiment of the present disclosure. As shown in fig. 2, the battery charge-discharge protection circuit further includes a first resistor R1 and a circuit protection module F.
One end of the first resistor R1 is connected with the discharge control module 2, the other end of the first resistor R1 is connected with one end of the circuit protection module F, the other end of the circuit protection module F is connected with the positive electrode of the power module, the first resistor R1 is a current detection resistor and used for realizing reading of charge and discharge current, and the circuit protection module F can be a fuse and used for overcurrent protection.
Referring to fig. 3, fig. 3 shows a schematic diagram of a battery charge-discharge protection circuit according to an embodiment of the present application. As shown in fig. 3, the charge control module 1 includes a first charge control unit 11, a second charge control unit 12, and a third charge control unit 13, and the discharge control module includes a first discharge control unit 21, a second discharge control unit 22, and a third discharge control unit 23.
Wherein the first charge control unit 11 is connected to the second charge control unit 12, the second charge control unit 12 is further connected to the third charge control unit 13, the third charge control unit 13 is further connected to the discharge control module 2, the first discharge control unit 21 is connected to the second discharge control unit 22, and the second discharge control unit 22 is further connected to the third discharge control unit 23.
Referring to fig. 4, fig. 4 shows a schematic structural diagram of a battery charge-discharge protection circuit according to an embodiment of the present application. As shown in fig. 4, the first charging control unit 11 includes a second resistor R2, a third resistor R3, and a first control switch K1, wherein the first control switch K1 may be an NMOS switch.
One end of the second resistor R2 is connected to the control module 3, the other end of the second resistor R2 is connected to one end of the third resistor R3 and a third connection end of the first control switch K1, the other end of the third resistor R3 and a first connection end of the first control switch K1 are connected to the negative electrode BAT-of the power module 4 and then connected to the ground PGND, and a second connection end of the first control switch K1 is connected to the second charging control unit 12.
The second charging control unit 12 includes a second control switch K2, a third control switch K3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and a first diode D1, and the second control switch K2 and the third control switch K3 may be NMOS.
Preferably, the first connection end of the second control switch K2 is connected to the second connection end of the first control switch K1, the second connection end of the second control switch K2 is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the third charging control unit 13, the third connection end of the second control switch K2 is connected to the second connection end of the third control switch K3 and one end of the fifth resistor R5, the third connection end of the third control switch K3 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, and the first connection end of the third control switch K3 is connected to the negative electrode BAT-connection of the power module to be connected to the ground after being connected to the other end of the sixth resistor R6.
The other end of the seventh resistor R7 is connected to the positive electrode of the first diode D1, and the negative electrode of the first diode D1 and the other end of the fourth resistor R4 are connected to the third charge control unit 13, respectively.
The third charging control unit 13 includes a fourth control switch K4, an eighth resistor R8, and a first capacitor C1, where the eighth resistor R8 and the first capacitor C1 are configured to ensure an on time of the fourth control switch K4, and the fourth control switch K4 may be a PMOS.
The first connection end of the fourth control switch K4 is connected to one end of the eighth resistor R8, one end of the first capacitor C1, the negative electrode of the first diode D1, the other end of the fourth resistor R4, and the external charging and discharging device 5, respectively.
The second connecting end of the fourth control switch K4 is connected to the discharging control module 2, and the third connecting end of the fourth control switch K4 is respectively connected with the other end of the eighth resistor R8, the other end of the first capacitor C1 and the other end of the fourth resistor R4.
In another embodiment, as shown in fig. 4, the first discharge control unit 21 includes a ninth resistor R9, a tenth resistor R10, and a fifth control switch K5, and the fifth control switch K5 may be an NMOS.
Preferably, one end of the ninth resistor R9 is connected to the control module 3, and the other end of the ninth resistor R9 is connected to one end of the tenth resistor R10 and a third connection end of the fifth control switch K5, respectively.
The other end of the tenth resistor R10 is connected to the first connection end of the fifth control switch K5, then connected to the negative electrode BAT of the power supply module 4, and then grounded, and the second connection end of the fifth control switch K5 is connected to the second discharge control unit 22.
The second discharge control unit 22 includes a sixth control switch K6, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, and a second diode D2.
Preferably, the first connection terminal of the sixth control switch K6 is connected to the second connection terminal of the fifth control switch K5, the second connection terminal of the sixth control switch K6 is connected to one terminal of the eleventh resistor R11, and the third connection terminal of the sixth control switch K6 is connected to one terminal of the twelfth resistor R12 and one terminal of the thirteenth resistor R13, respectively.
The other end of the twelfth resistor R12 is connected to the negative electrode BAT of the power supply module 4 and then grounded, the other end of the thirteenth resistor R13 is connected to the positive electrode of the second diode D2, the negative electrode of the second diode D2 is connected to the third discharge control unit 23, and the other end of the eleventh resistor R11 is connected to the third discharge control unit 23.
The third discharging control unit 23 includes a seventh control switch K7, a fourteenth resistor R14, and a second capacitor C2, where the fourteenth resistor R14 and the second capacitor C2 are used to ensure the on time of the seventh control switch K7, and the seventh control switch K7 may be a PMOS.
Preferably, the first connection end of the seventh control switch K7 is connected to one end of the fourteenth resistor R14, one end of the second capacitor C2, and one end of the first resistor R1 in the battery charge/discharge protection circuit, respectively, and the second connection end of the seventh control switch K7 is connected to the second connection end of the fourth control switch K4 in the charge control module 1.
The third connection terminal of the seventh control switch K7 is connected to the other terminal of the fourteenth resistor R14, the other terminal of the second capacitor C2, and the other terminal of the eleventh resistor R11, respectively.
In a specific implementation, as shown in fig. 4, when the external charging and discharging device 5 is about to charge the power module 4, the control module outputs a high level to the third connection end of the first control switch K1, sequentially controls the first control switch K1, the second control switch K2 and the fourth control switch K4 to be turned on, the control module outputs a low level to the third connection end of the fifth control switch K5, the sixth control switch K6 and the seventh control switch K7 are in an off state, that is, the charging control module 1 is in an on state, and the discharging control module 2 is in an off state, at this time, if the voltage provided by the external charging and discharging device 5 does not exceed the normal charging range, the third control switch K3 is in an off state, and the external charging and discharging device 5 normally charges the power module.
When the voltage provided by the external charging and discharging device 5 exceeds the highest charging voltage allowed by the power module 4, the first diode D1 is turned on, and the sixth resistor R6 and the seventh resistor R7 which are subjected to voltage division drive the third control switch K3 to be turned on, so that the second control switch K2 is turned off, and at this time, the fourth control switch K4 is in a cut-off state, so that the voltage provided by the external charging and discharging device 5 cannot enter the power module 4, the battery is reliably and effectively protected, and the overvoltage risk is avoided.
When the power module 4 is required to discharge the external charging and discharging device 5, the control module 3 outputs a high level to the third connection end of the fifth control switch K5, sequentially controls the fifth control switch K5, the sixth control switch K6 and the seventh control switch K7 to be turned on, and the control module 3 outputs a low level to the third connection end of the first control switch K1 to control the first control switch K1, the second control switch K2 and the fourth control switch K4 to be in a cut-off state, that is, the charging control module 1 is in a cut-off state, and the discharging control module 2 is in a turn-on state, so that the discharging of the power module 4 to the external charging and discharging device 5 is realized.
When the power module 4 is in an under-voltage state, the second diode D2 is turned on, and the thirteenth resistor R13 and the fourteenth resistor R14 which are subjected to voltage division are turned on to ground, so that the third control switch K3 is turned off, and the seventh control switch K7 is in an off state, so that when the voltage of the power module 4 is too low, the power module 4 cannot discharge outwards, thereby reducing the under-voltage risk of the power module 4.
According to the battery charging and discharging control circuit, the battery is guaranteed to be charged and discharged in a limited voltage range through the combination of the charging control circuit and the discharging control circuit, and the battery is well protected in a limited charging and discharging voltage range.
The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A battery charge-discharge protection circuit is characterized in that the battery charge-discharge protection circuit comprises a charge control module, a discharge control module, a control module and a power supply module,
the control module is respectively connected with the charging control module and the discharging control module;
the charging control module is connected with the discharging control module, and the power supply module is respectively connected with the charging control module and the discharging control module;
wherein, the battery charge-discharge protection circuit also comprises a first resistor and a circuit protection module,
one end of the first resistor is connected with the discharge control module, and the other end of the first resistor is connected with one end of the circuit protection module;
the other end of the circuit protection module is connected with the positive electrode of the power supply module.
2. The battery charge-discharge protection circuit of claim 1, wherein the charge control module comprises a first charge control unit, a second charge control unit, and a third charge control unit,
the first charging control unit is connected with the second charging control unit, the second charging control unit is further connected to the third charging control unit, and the third charging control unit is further connected with the discharging control module.
3. The battery charge and discharge protection circuit of claim 2, wherein the first charge control unit comprises a second resistor, a third resistor and a first control switch,
one end of the second resistor is connected with the control module, and the other end of the second resistor is connected with one end of the third resistor and a third connecting end of the first control switch respectively;
the other end of the third resistor and the first connecting end of the first control switch are connected with the negative electrode of the power supply module respectively and then connected to the ground, and the second connecting end of the first control switch is connected with the second charging control unit.
4. The battery charge and discharge protection circuit of claim 3, wherein the second charge control unit comprises a second control switch, a third control switch, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a first diode,
the first connecting end of the second control switch is connected with the second connecting end of the first control switch, the second connecting end of the second control switch is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the third charging control unit, and the third connecting end of the second control switch is respectively connected with the second connecting end of the third control switch and one end of the fifth resistor;
the third connecting end of the third control switch is connected with one end of the sixth resistor and one end of the seventh resistor respectively, and the first connecting end of the third control switch is connected with the other end of the sixth resistor and then connected with the negative electrode of the power supply module to be connected with the ground;
the other end of the seventh resistor is connected with the positive electrode of the first diode, and the negative electrode of the first diode and the other end of the fourth resistor are respectively connected with the third charging control unit.
5. The battery charge and discharge protection circuit of claim 4, wherein the third charge control unit comprises a fourth control switch, an eighth resistor and a first capacitor,
the first connecting end of the fourth control switch is respectively connected with one end of the eighth resistor, one end of the first capacitor, the negative electrode of the first diode, the other end of the fourth resistor and external charging and discharging equipment;
the second connecting end of the fourth control switch is connected to the discharge control module, and the third connecting end of the fourth control switch is respectively connected with the other end of the eighth resistor, the other end of the first capacitor and the other end of the fourth resistor.
6. The battery charge-discharge protection circuit of claim 1, wherein the discharge control module comprises a first discharge control unit, a second discharge control unit, and a third discharge control unit,
wherein the first discharge control unit is connected with the second discharge control unit, and the second discharge control unit is also connected to the third discharge control unit.
7. The battery charge and discharge protection circuit of claim 6 wherein said first discharge control unit comprises a ninth resistor, a tenth resistor and a fifth control switch,
one end of the ninth resistor is connected with the control module, and the other end of the ninth resistor is connected with one end of the tenth resistor and a third connecting end of the fifth control switch respectively;
the other end of the tenth resistor is connected with the first connecting end of the fifth control switch, then connected with the negative electrode of the power supply module, and then grounded, and the second connecting end of the fifth control switch is connected with the second discharge control unit.
8. The battery charge-discharge protection circuit of claim 7 wherein said second discharge control unit comprises a sixth control switch, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a second diode,
the first connecting end of the sixth control switch is connected to the second connecting end of the fifth control switch, the second connecting end of the sixth control switch is connected with one end of the eleventh resistor, and the third connecting end of the sixth control switch is connected with one end of the twelfth resistor and one end of the thirteenth resistor respectively;
the other end of the twelfth resistor is connected with the negative electrode of the power supply module and then grounded, the other end of the thirteenth resistor is connected with the positive electrode of the second diode, and the negative electrode of the second diode is connected with the third discharge control unit;
the other end of the eleventh resistor is connected with the third discharge control unit.
9. The battery charge-discharge protection circuit of claim 8 wherein said third discharge control unit comprises a seventh control switch, a fourteenth resistor and a second capacitor,
the first connecting end of the seventh control switch is respectively connected with one end of the fourteenth resistor, one end of the second capacitor and one end of the first resistor in the battery charge-discharge protection circuit, and the second connecting end of the seventh control switch is connected with the second connecting end of the fourth control switch in the charge control module;
and a third connecting end of the seventh control switch is respectively connected with the other end of the fourteenth resistor, the other end of the second capacitor and the other end of the eleventh resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320919763.0U CN220368482U (en) | 2023-04-21 | 2023-04-21 | Battery charge-discharge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320919763.0U CN220368482U (en) | 2023-04-21 | 2023-04-21 | Battery charge-discharge protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN220368482U true CN220368482U (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320919763.0U Active CN220368482U (en) | 2023-04-21 | 2023-04-21 | Battery charge-discharge protection circuit |
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| Country | Link |
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| CN (1) | CN220368482U (en) |
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- 2023-04-21 CN CN202320919763.0U patent/CN220368482U/en active Active
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