CN220586021U - Battery control device - Google Patents
Battery control device Download PDFInfo
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- CN220586021U CN220586021U CN202322000799.1U CN202322000799U CN220586021U CN 220586021 U CN220586021 U CN 220586021U CN 202322000799 U CN202322000799 U CN 202322000799U CN 220586021 U CN220586021 U CN 220586021U
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- 230000005669 field effect Effects 0.000 claims description 32
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000004146 energy storage Methods 0.000 claims description 13
- 230000000740 bleeding effect Effects 0.000 claims description 2
- 230000003321 amplification Effects 0.000 claims 1
- 238000003199 nucleic acid amplification method Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 10
- 238000002955 isolation Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a battery control device, which comprises: the first connecting end and the second connecting end are connected with the first battery module and the second battery module; the first switch module is arranged between the first battery module and the second connecting end and is used for controlling the first battery module to be communicated with or disconnected from the second connecting end; the second switch module is arranged between the second battery module and the second connecting end; the parallel driving module is connected with the control end of the second switch module and is used for driving the second switch module to communicate so that the second battery module end is communicated with the second connecting end. The battery control device can avoid supplying power to the parallel operation driving module only through a single battery module, effectively keeps the driving of the parallel operation driving module, and is beneficial to reducing the power consumption and the cost.
Description
Technical Field
The utility model relates to the technical field of battery control devices, in particular to a battery control device.
Background
The existing Battery Management System (BMS) is generally provided with a discharging MOS tube and a charging MOS tube, wherein the discharging MOS tube and the charging MOS tube are used for controlling connection between the main battery pack and a load when the main battery pack is charged and discharged, and the parallel MOS tube is also arranged for connecting an extended battery pack and the load, so that the extended battery pack can be continuously output when the main battery pack is under-voltage, and the capacity of a battery is further increased; as shown in FIG. 1, because the parallel operation MOS tube and the main battery pack are not grounded together, the existing scheme is to set an isolation power supply to drive and control the parallel operation MOS tube, but the isolation power supply is powered by the main battery pack, when the voltage of the system is higher, the isolation power supply and the power device with high withstand voltage are needed to be used, the selectivity is small, the cost is high, and the driving power consumption of the isolation power supply is large, when the voltage of the main battery pack is lower, the power consumption is needed to be continued to maintain the isolation power supply to drive the parallel operation MOS tube, the service life of the main battery pack can be shortened, and meanwhile, the main battery pack can be powered off at any time, so that the isolation power supply can not continuously drive the parallel operation MOS tube to maintain the normal output of the extended battery pack.
Disclosure of Invention
The utility model aims to provide a battery control device which can avoid supplying power to a parallel operation driving module through a single battery module, effectively keep the driving of the parallel operation driving module, and is beneficial to reducing the power consumption and the cost.
In order to achieve the above object, the present utility model discloses a battery control device for controlling charge and discharge of a first battery module and a second battery module, comprising: the device comprises a first connecting end, a second connecting end, a first switch module, a second switch module and a parallel operation driving module, wherein the first connecting end and the second connecting end are connected with external equipment, the first connecting end is also connected with positive ends of the first battery module and the second battery module respectively, and the second connecting end is also connected with negative ends of the first battery module and the second battery module respectively; the first switch module is arranged between the negative electrode end of the first battery module and the second connecting end, the control end of the first switch module is connected with the control module, and the first switch module is used for controlling the connection or disconnection of the negative electrode end of the first battery module and the second connecting end; the second switch module is arranged between the negative electrode end of the second battery module and the second connecting end; the input end of the parallel operation driving module is connected with the first connecting end, the output end of the parallel operation driving module is connected with the control end of the second switch module, and the parallel operation driving module is used for driving the second switch module to communicate so that the negative electrode end of the second battery module is communicated with the second connecting end.
Optionally, the first switch module includes a first field effect tube and a second field effect tube, the first ends of the first field effect tube and the second field effect tube are respectively connected with the control module, the second end of the first field effect tube is connected with the negative electrode end of the first battery module, the second end of the second field effect tube is connected with the second connecting end, and the third end of the first field effect tube is connected with the third end of the second field effect tube.
Optionally, the second switch module includes a third field effect tube, a first end of the third field effect tube is connected with the parallel driving module, a second end of the third field effect tube is connected with the second connection end, and a third end of the third field effect tube is connected with a negative electrode end of the second battery module.
Optionally, the parallel driving module includes a step-down unit and a second-stage amplifying unit, an input end of the step-down unit is connected with the first connection end, an output end of the step-down unit is connected with an input end of the second-stage amplifying unit, an output end of the second-stage amplifying unit is connected with a control end of the second switch module, and the step-down unit and the second-stage amplifying unit are used for reducing a voltage output by the first battery module or the second battery module and outputting the reduced voltage to the control end of the second switch module.
Optionally, the voltage reducing unit includes a first diode and a first resistor, an anode end of the first diode is connected with the first connection end, a cathode end of the first diode is connected with a first end of the first resistor, and a second end of the first resistor is connected with an input end of the second-stage amplifying unit.
Optionally, the second-stage amplifying unit includes a second resistor, a third resistor, a first triode and a second triode, a collector of the first triode, a first end of the second resistor and a first end of the third resistor are connected with an output end of the voltage reducing unit, a second end of the second resistor is connected with a collector of the second triode, a second end of the third resistor is connected with a base of the second triode, an emitter of the second triode is connected with a base of the first triode, and an emitter of the first triode is connected with a control end of the second switch module.
Optionally, the parallel driving module further includes an energy storage unit and a bleeder unit, the energy storage unit is connected with the control end of the second switch module, and the energy storage unit is used for outputting voltage to the control end of the second switch module when the second-stage amplifying unit stops outputting voltage; the bleeder unit is connected with the output end of the secondary amplifying unit, and the bleeder unit is used for bleeding the voltage output by the output end of the secondary amplifying unit when the first connecting end is powered down.
Optionally, the energy storage unit includes a first capacitor, the bleeder unit includes a fourth resistor, a first end of the first capacitor and a first end of the fourth resistor are connected with the output end of the second-stage amplifying unit, and a second end of the first capacitor and a second end of the fourth resistor are connected with the second connecting end.
Optionally, the second-stage amplifying unit further includes a second diode and a second capacitor, a negative electrode end of the second diode is connected with the base electrode of the second triode, a positive electrode end of the second diode is connected with the second connection end, a first end of the second capacitor is connected with the base electrode of the first triode, and a first end of the second capacitor is connected with the second connection end.
Optionally, the second diode is a zener diode, and the second diode is used for clamping the voltage output by the step-down unit to 12V.
The parallel operation driving module is arranged between the second battery module and the second connecting end to control the second battery module to be connected with the first connecting end, the parallel operation driving module is connected with the first battery module and the second battery module through the first connecting end, the first switch module is connected between the first battery module and the second connecting end, the parallel operation driving module can take electricity from the first battery module through the first connecting end when the first switch module controls the first battery module to be connected with the second connecting end, and the first battery module does not supply electricity to the parallel operation driving module through the first connecting end when the first switch module controls the first battery module to be disconnected with the second connecting end, and the parallel operation driving module can take electricity from the second battery module through the first connecting end, so that the parallel operation driving module is prevented from being supplied with electricity through only a single battery module, the driving of the parallel operation driving module is effectively maintained, and meanwhile, the power consumption is reduced, and the cost is reduced.
Drawings
Fig. 1 is a schematic diagram of a conventional battery management system.
Fig. 2 is a schematic structural diagram of a battery control device, a control module, a first battery module, and a second battery module according to an embodiment of the present utility model.
Fig. 3 is a schematic structural diagram of a parallel driving module in the battery control device according to an embodiment of the present utility model.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present utility model in detail, the following description is made in connection with the embodiments and the accompanying drawings.
Referring to fig. 2 and 3, the present utility model discloses a battery control apparatus for controlling charge and discharge of a first battery module 100 and a second battery module 200, comprising: the first connection end P+ and the second connection end P-, the first switch module 1, the second switch module 2 and the parallel driving module 3 are connected with the external equipment 300, the first connection end P+ is also connected with the positive electrode ends of the first battery module 100 and the second battery module 200 respectively, and the second connection end P-is also connected with the negative electrode ends of the first battery module 100 and the second battery module 200 respectively; the first switch module 1 is disposed between the negative terminal of the first battery module 100 and the second connection terminal P-, the control terminal of the first switch module 1 is connected with the control module 400, and the first switch module 1 is used for controlling the negative terminal of the first battery module 100 to be connected with or disconnected from the second connection terminal P-; the second switch module 2 is disposed between the negative terminal and the second connection terminal P-of the second battery module 200; the input end of the parallel driving module 3 is connected with the first connecting end p+, the output end of the parallel driving module 3 is connected with the control end of the second switch module 2, and the parallel driving module 3 is used for driving the second switch module 2 to communicate so that the negative end of the second battery module 200 is communicated with the second connecting end P-.
The parallel operation driving module 3 is arranged to drive the second switch module 2, the second switch module 2 is arranged between the second battery module 200 and the second connecting end P-to control the second battery module 200 to be connected with the first connecting end P+, the parallel operation driving module 3 is connected with the first battery module 100 and the second battery module 200 through the first connecting end P+, the first switch module 1 is connected between the first battery module 100 and the second connecting end P-, when the first switch module 1 controls the first battery module 100 to be connected with the second connecting end P-, the parallel operation driving module 3 can take electricity from the first battery module 100 through the first connecting end P+, and when the first switch module 1 controls the first battery module 100 to be disconnected with the second connecting end P-, the first battery module 100 does not supply electricity to the parallel operation driving module 3 through the first connecting end P+, and the parallel operation driving module 3 can take electricity from the second battery module 200 through the first connecting end P+, so that the parallel operation driving module 3 is prevented from being supplied with electricity through a single battery module, the parallel operation driving module 3 can be effectively kept, and the cost of the parallel operation driving module 3 can be reduced.
Referring to fig. 2 and 3, the first switch module 1 includes a first field effect transistor 11 and a second field effect transistor 12, first ends of the first field effect transistor 11 and the second field effect transistor 12 are respectively connected with the control module 400, a second end of the first field effect transistor 11 is connected with a negative electrode end of the first battery module 100, a second end of the second field effect transistor 12 is connected with a second connection end P-, a third end of the first field effect transistor 11 is connected with a third end of the second field effect transistor 12, connection between the first battery module 100 and the first connection end p+ and the second connection end P-is advantageously disconnected when the first battery module 100 is under-voltage or overcharged, battery is effectively protected,
specifically, in this embodiment, when the first battery module 100 outputs normally, the control module 400 controls the first fet 11 and the second fet 12 to conduct normally, the first connection terminal p+ and the second connection terminal P-output normally, and the parallel driving module 3 takes electricity through the first battery module 100 and drives the parallel driving module 3 with normal output voltage; when the first battery module 100 is under-voltage, the control module 400 controls the first fet 11 to be turned off; and the second battery module 200 outputs normally, the first connection terminal p+ and the second connection terminal P-can output normally, so that the parallel driving module 3 can take power from the second battery module 200 and output voltage to the second switch module 2 stably.
Optionally, the first fet 11 and the second fet 12 are N-channel fets, the first ends of the first fet 11 and the second fet 12 are gates, the second ends of the first fet 11 and the second fet 12 are sources, and the third ends of the first fet 11 and the second fet 12 are drains, but not limited thereto.
Referring to fig. 2 and 3, the second switch module 2 includes a third fet 21, a first end of the third fet 21 is connected to the parallel driving module 3, a second end of the third fet 21 is connected to the second connection end P-, and a third end of the third fet 21 is connected to the negative electrode end of the second battery module 200, which is beneficial for expanding the connection of the second battery module 200 and improving the battery capacity.
Specifically, in the present embodiment, the first battery module 100 and the second battery module 200 are battery packs, but not limited thereto, and the parallel driving module 3 can take electricity from the first battery module 100 and the second battery module 200 through the first connection terminal p+ and keep stably driving the third fet 21 to be turned on to keep the second battery module 200 connected to the second connection terminal P-, so that the second battery module 200 can stably output.
Optionally, the third fet 21 is an N-channel fet, the first end of the third fet 21 is a gate, the second end of the third fet 21 is a source, and the third end of the third fet 21 is a drain.
Referring to fig. 2 and 3, the parallel driving module 3 includes a voltage reducing unit 31 and a second amplifying unit 32, wherein an input end of the voltage reducing unit 31 is connected to the first connection end p+, an output end of the voltage reducing unit 31 is connected to an input end of the second amplifying unit 32, an output end of the second amplifying unit 32 is connected to a control end of the second switching module 2, and the voltage reducing unit 31 and the second amplifying unit 32 are configured to reduce a voltage output from the first battery module 100 or the second battery module 200 and output the reduced voltage to the control end of the second switching module 2.
Specifically, in this embodiment, the parallel driving module 3 is further connected to the second connection end P-, and takes the second output end P-as the reference ground, and power is taken from the first battery module 100 and the second battery module 200 through the first connection end p+ and the VCC voltage of 12V is stably output to drive the second switch module 2 to be turned on after the voltage is reduced through the voltage reducing unit 31 and the second amplifying unit 32, so that the parallel driving module has low cost and good applicability, is compatible with conventional 48V and 72V battery systems, and avoids the influence on the normal control of the second switch module 2 due to the power taking through the single battery module.
Referring to fig. 2 and 3, the step-down unit 31 includes a first diode D1 and a first resistor R1, wherein a positive terminal of the first diode D1 is connected to the first connection terminal p+, a negative terminal of the first diode D1 is connected to the first terminal of the first resistor R1, and a second terminal of the first resistor R1 is connected to the input terminal of the second-stage amplifying unit 32.
Specifically, in the embodiment, the first diode D1 is an anti-reverse diode, so as to avoid damaging components in the parallel driving module 3 when the parallel driving module 3 is reversely connected to the first connection end p+ and the second connection end P-, and the first resistor R1 is a voltage dividing resistor, so that energy of the voltage input by the partial voltage reducing unit 31 can be absorbed to reduce the voltage reaching the first triode Q1, and further reduce the stress of the first triode Q1, but the utility model is not limited thereto.
Referring to fig. 2 and 3, the second-stage amplifying unit 32 includes a second resistor R2, a third resistor R3, a first triode Q1 and a second triode Q2, where a collector of the first triode Q1, a first end of the second resistor R2 and a first end of the third resistor R3 are connected to an output end of the voltage reducing unit 31, a second end of the second resistor R2 is connected to a collector of the second triode Q2, a second end of the third resistor R3 is connected to a base of the second triode Q2, an emitter of the second triode Q2 is connected to a base of the first triode Q1, and an emitter of the first triode Q1 is connected to a control end of the second switch module 2.
Specifically, in this embodiment, the second resistor R2 and the third resistor R3 are current limiting resistors, the voltage reducing unit 31 outputs voltages to the first triode Q1, the second resistor R2 and the third resistor R3, the third resistor R3 is connected with the base of the second triode Q2 and drives the second triode Q2 to be conducted, after the second triode Q2 is conducted, the second resistor R2 is connected with the base of the first triode Q1 and drives the first triode Q1 to be conducted, the first triode Q1 can absorb energy of the voltage input by the voltage reducing unit 31, so that the voltage input by the first connecting end p+ is reduced to 12V after passing through the voltage reducing unit 31 and the second amplifying unit 32, and then the VCC voltage of 12V is provided to the parallel driving module 3, and after passing through the second triode Q2 and the second amplifying of the first triode Q1, the current driving capability of the VCC voltage output by the parallel driving module 3 is effectively improved.
Referring to fig. 2 and 3, the parallel driving module 3 further includes an energy storage unit 33 and a discharge unit 34, the energy storage unit 33 is connected to the control end of the second switch module 2, and the energy storage unit 33 is configured to output a voltage to the control end of the second switch module 2 when the second-stage amplifying unit 32 stops outputting the voltage; the discharging unit 34 is connected to the output end of the secondary amplifying unit 32, and the discharging unit 34 is used for discharging the voltage output by the output end of the secondary amplifying unit 32 when the first connection end p+ is powered down, so that the output capability and safety of the parallel operation driving module 3 are improved.
Optionally, the energy storage unit 33 includes a first capacitor C1, the bleeder unit 34 includes a fourth resistor R4, first ends of the first capacitor C1 and the fourth resistor R4 are connected to the output terminal of the second-stage amplifying unit 32, and second ends of the first capacitor C1 and the fourth resistor R4 are connected to the second connection terminal P-.
Specifically, in this embodiment, the fourth resistor R4 is a bleeder resistor, when the first connection end p+ is powered down, the fourth resistor R4 can enable the output end of the parallel operation driving module 3 to be powered down quickly, the first capacitor C1 is an energy storage capacitor, and the first capacitor C1 can store the voltage energy output by the second-stage amplifying unit 32 and output the voltage energy to the second switch module 2, which is favorable for improving the output capability of the parallel operation driving module 3, but is not limited thereto.
Referring to fig. 2 and 3, the second-stage amplifying unit 32 further includes a second diode DZ1 and a second capacitor C2, wherein a negative terminal of the second diode DZ1 is connected to the base of the second triode Q2, a positive terminal of the second diode DZ1 is connected to the second connection terminal P-, a first terminal of the second capacitor C2 is connected to the base of the first triode Q1, and a first terminal of the second capacitor C2 is connected to the second connection terminal P-.
Specifically, in the embodiment, the second capacitor C2 is a filter capacitor, and the second capacitor C2 can filter out the clutter in the circuit of the parallel driving module 3, so as to improve the anti-interference capability of the parallel driving module 3, but is not limited thereto.
Optionally, the second diode DZ1 is a zener diode, and the second diode DZ1 is used for clamping the voltage output by the step-down unit 31 to 12V to stably drive the second triode Q2 to be turned on.
Referring to fig. 2 and 3, the present utility model further discloses a battery management device, where the battery management device includes a control module 400 and a battery control device as described above, the control module 400 is connected to the first battery module 100, and the control module 400 is configured to control the first fet 11 and the second fet 12 to be turned on or off according to the voltage condition of the first battery module 100.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (10)
1. A battery control apparatus for controlling charge and discharge of a first battery module and a second battery module, comprising:
the first connecting end and the second connecting end are connected with external equipment, the first connecting end is also connected with the positive electrode ends of the first battery module and the second battery module respectively, and the second connecting end is also connected with the negative electrode ends of the first battery module and the second battery module respectively;
the first switch module is arranged between the negative electrode end of the first battery module and the second connecting end, the control end of the first switch module is connected with the control module, and the first switch module is used for controlling the connection or disconnection of the negative electrode end of the first battery module and the second connecting end;
the second switch module is arranged between the negative electrode end of the second battery module and the second connecting end;
the parallel operation driving module is used for driving the second switch module to communicate so that the negative electrode end of the second battery module is communicated with the second connecting end.
2. The battery control device of claim 1, wherein the first switch module comprises a first field effect transistor and a second field effect transistor, wherein first ends of the first field effect transistor and the second field effect transistor are respectively connected with the control module, a second end of the first field effect transistor is connected with a negative electrode end of the first battery module, a second end of the second field effect transistor is connected with the second connection end, and a third end of the first field effect transistor is connected with a third end of the second field effect transistor.
3. The battery control device of claim 1, wherein the second switch module comprises a third field effect transistor, a first end of the third field effect transistor is connected to the parallel driving module, a second end of the third field effect transistor is connected to the second connection end, and a third end of the third field effect transistor is connected to a negative electrode end of the second battery module.
4. The battery control device according to claim 1, wherein the parallel driving module includes a step-down unit and a secondary amplifying unit, an input terminal of the step-down unit is connected to the first connection terminal, an output terminal of the step-down unit is connected to an input terminal of the secondary amplifying unit, an output terminal of the secondary amplifying unit is connected to a control terminal of the second switching module, and the step-down unit and the secondary amplifying unit are configured to reduce a voltage output from the first battery module or the second battery module and output the reduced voltage to the control terminal of the second switching module.
5. The battery control device according to claim 4, wherein the step-down unit includes a first diode and a first resistor, a positive terminal of the first diode is connected to the first connection terminal, a negative terminal of the first diode is connected to a first terminal of the first resistor, and a second terminal of the first resistor is connected to an input terminal of the second amplification unit.
6. The battery control device according to claim 4, wherein the secondary amplifying unit includes a second resistor, a third resistor, a first triode and a second triode, wherein a collector of the first triode, a first end of the second resistor and a first end of the third resistor are connected with an output end of the voltage reducing unit, a second end of the second resistor is connected with a collector of the second triode, a second end of the third resistor is connected with a base of the second triode, an emitter of the second triode is connected with a base of the first triode, and an emitter of the first triode is connected with a control end of the second switching module.
7. The battery control device according to claim 4, wherein the parallel driving module further comprises an energy storage unit and a discharge unit, the energy storage unit is connected with the control end of the second switch module, and the energy storage unit is used for outputting voltage to the control end of the second switch module when the secondary amplifying unit stops outputting voltage; the bleeder unit is connected with the output end of the secondary amplifying unit, and the bleeder unit is used for bleeding the voltage output by the output end of the secondary amplifying unit when the first connecting end is powered down.
8. The battery control device according to claim 7, wherein the energy storage unit includes a first capacitor, the discharge unit includes a fourth resistor, first ends of the first capacitor and the fourth resistor are connected to the output terminal of the secondary amplifying unit, and second ends of the first capacitor and the fourth resistor are connected to the second connection terminal.
9. The battery control device according to claim 6, wherein the secondary amplifying unit further comprises a second diode and a second capacitor, a negative terminal of the second diode is connected to the base of the second triode, a positive terminal of the second diode is connected to the second connection terminal, a first terminal of the second capacitor is connected to the base of the first triode, and a first terminal of the second capacitor is connected to the second connection terminal.
10. The battery control device according to claim 9, wherein the second diode is a zener diode for clamping the voltage output from the step-down unit to 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322000799.1U CN220586021U (en) | 2023-07-27 | 2023-07-27 | Battery control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322000799.1U CN220586021U (en) | 2023-07-27 | 2023-07-27 | Battery control device |
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| Publication Number | Publication Date |
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| CN220586021U true CN220586021U (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322000799.1U Active CN220586021U (en) | 2023-07-27 | 2023-07-27 | Battery control device |
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| CN (1) | CN220586021U (en) |
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- 2023-07-27 CN CN202322000799.1U patent/CN220586021U/en active Active
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