CN112054563A - Follow current switching circuit and battery formation device - Google Patents
Follow current switching circuit and battery formation device Download PDFInfo
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- CN112054563A CN112054563A CN201910485972.7A CN201910485972A CN112054563A CN 112054563 A CN112054563 A CN 112054563A CN 201910485972 A CN201910485972 A CN 201910485972A CN 112054563 A CN112054563 A CN 112054563A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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Abstract
The invention belongs to the field of battery management and discloses a follow current switching circuit and a battery formation device, wherein the follow current switching circuit comprises a relay, a first follow current module and a second follow current module; the relay switches according to the switch control signal; the first follow current module is communicated with the follow current bypass when the battery is charged and the relay is switched; the second follow current module is communicated with the follow current bypass when the battery discharges and the relay is switched; because the relay carries out the switching of charge and discharge passageway to when stopping to carry out charge and discharge to ith battery, first afterflow module or second afterflow module afterflow switch on the place afterflow bypass, so avoided the cutout when switching charge and discharge return circuit, thereby improved the battery and become the effect.
Description
Technical Field
The invention belongs to the field of battery management, and particularly relates to a follow current switching circuit and a battery formation device.
Background
The traditional battery formation device connects the batteries to be formed in series for formation, and the single batteries are connected with a voltage monitoring control and charging and discharging circuit, so that the voltage of each single battery can be monitored in the process of charging and discharging the batteries, and the single batteries are prevented from being overcharged and overdischarged. Although the switching command response and operation of the relay are faster, the relay still has an off-on period of 10ms to 20ms, and the charging and discharging circuit is briefly interrupted.
Therefore, the traditional battery formation device has the defect that the ground battery formation effect is poor due to the fact that the current of a charge-discharge loop is cut off when a relay is switched.
Disclosure of Invention
The invention provides a follow current switching circuit and a battery formation device, and aims to solve the problem that a conventional battery formation device is poor in battery formation effect due to the fact that a charge-discharge loop is cut off when a relay is switched.
In one aspect, the present invention provides a freewheel switching circuit, including:
a relay for switching according to the switch control signal;
the first follow current module is connected with a movable contact of the relay and a first fixed contact of the relay and is used for communicating the follow current bypass when a battery is charged and the relay is switched;
the second follow current module is connected with a movable contact of the relay and a second fixed contact of the relay and is used for communicating the follow current bypass when the battery is discharged and the relay is switched;
the movable contact of the relay, the output end of the first follow current module and the input end of the second follow current module jointly form a third input and output end of the follow current switching circuit; the first stationary contact of the relay and the input end of the first follow current module jointly form a first input and output end of the follow current switching circuit; and the second stationary contact of the relay and the output end of the second follow current module jointly form a second input and output end of the follow current switching circuit.
In another aspect, the present invention provides a battery formation device, which includes n batteries, a power module, and n freewheeling switching circuits as described above;
the third input and output end of the ith follow current switching circuit is connected with the anode of the (i-1) th battery and the second input and output end of the (i-1) th follow current switching circuit, the first input and output end of the ith follow current switching circuit is connected with the cathode of the ith battery, the second input and output end of the ith follow current switching circuit is connected with the anode of the ith battery and the third input and output end of the (i + 1) th follow current switching circuit, the third input and output end of the 1 st follow current switching circuit is connected with the anode of the power module, and the second input and output end of the nth follow current switching circuit is connected with the anode of the nth battery and the cathode of the power module;
the battery formation device further includes:
the ith detection module is connected with the ith battery and used for detecting the voltage of the ith battery to generate the ith detection voltage;
the control module is connected with the ith detection module and used for generating an ith control signal according to the ith detection voltage;
wherein i is a natural number not more than n.
The invention provides a follow current switching circuit and a battery formation device, which comprise a relay, a first follow current module and a second follow current module; the relay switches according to the switch control signal; the first follow current module is communicated with the follow current bypass when the battery is charged and the relay is switched; the second follow current module is communicated with the follow current bypass when the battery discharges and the relay is switched; because the relay carries out the switching of charge and discharge passageway to when stopping to carry out charge and discharge to ith battery, first afterflow module or second afterflow module afterflow switch on the place afterflow bypass, so avoided the cutout when switching charge and discharge return circuit, thereby improved the battery and become the effect.
Drawings
In order to more clearly illustrate the technical invention in the embodiments of the present invention, the drawings used in the description of the embodiments 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 other drawings can be obtained by those skilled in the art without inventive efforts.
Fig. 1 is a block diagram of a freewheel switching circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit structure diagram of a freewheeling switching circuit according to an embodiment of the present invention;
fig. 3 is a block diagram of a battery formation apparatus according to an embodiment of the present invention;
fig. 4 is a schematic current flow diagram of a freewheeling switching circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating another current flow of the freewheel switching circuit according to the embodiment of the present invention;
fig. 6 is a schematic diagram illustrating another current flow of the freewheel switching circuit according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a module structure of a freewheel switching circuit provided in an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and details are as follows:
the freewheel switching circuit includes a relay K1, a first freewheel module 01, and a second freewheel module 02.
The relay K1 is used for switching according to the switch control signal; the first freewheeling module 01 is connected with a movable contact of the relay K1 and a first fixed contact of the relay K1 and is used for communicating a freewheeling bypass when the battery BATi is charged and the relay K1 is switched; the second freewheeling module 02 is connected with the movable contact of the relay K1 and the second fixed contact of the relay K1, and is used for communicating the freewheeling bypass when the battery batt is discharged and the relay K1 is switched.
The movable contact of the relay K1, the output end of the first follow current module 01 and the input end of the second follow current module 02 jointly form a third input and output end of the follow current switching circuit; a first fixed contact of the relay K1 and the input end of the first follow current module 01 jointly form a first input and output end of the follow current switching circuit; the second stationary contact of the relay K1 and the output terminal of the second freewheel module 02 together form a second input/output terminal of the freewheel switching circuit. Follow current switching circuit
Fig. 2 shows an exemplary circuit structure of the freewheel switching circuit provided in the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:
the first freewheel module 01 includes a first fuse F1 and a first diode D1.
The first end of the first fuse F1 is the output end of the first freewheel module 01, the second end of the first fuse F1 is connected to the cathode of the first diode D1, and the anode of the first diode D1 is the input end of the first freewheel module 01.
The second freewheel module 02 includes a second fuse F2 and a second diode D2.
The first terminal of the second fuse F2 is the input terminal of the second freewheel module 02, the second terminal of the second fuse F2 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is the output terminal of the second freewheel module 02.
An embodiment of the present invention further provides a battery formation device, as shown in fig. 3, the battery formation device includes n batteries batt, a power module 05, and n freewheeling switching circuits 00i described above.
A third input-output end of the ith follow current switching circuit 00i is connected with the anode of the i-1 th battery and a second input-output end of the i-1 th follow current switching circuit, a first input-output end of the ith follow current switching circuit 00i is connected with the cathode of the ith battery BATi, a second input-output end of the ith follow current switching circuit 00i is connected with the anode of the ith battery BATi and a third input-output end of the (i + 1) th follow current switching circuit, a third input-output end of the 1 st follow current switching circuit 001 is connected with the anode of the power module 05, and a second input-output end of the nth follow current switching circuit 00n is connected with the anode of the nth battery BATn and the cathode of the power module 05;
the battery formation device further includes n detection modules 03i and a control module 04.
The ith detection module 03i is connected with the ith battery BATi and used for detecting the voltage of the ith battery BAT to generate an ith detection voltage; the control module 04 is connected with the ith detection module 03i and is used for generating an ith control signal according to the ith detection voltage; wherein i is a natural number not more than n.
When the ith battery BATi is charged, the control module 04 is specifically configured to generate a switch control signal according to the ith detection voltage when the ith detection voltage is judged to be greater than the first preset value; the relay K1 in the ith freewheeling switching circuit 00i is specifically configured to switch the charging loop according to the switch control signal to stop charging the ith battery bat; the first freewheel module 01 in the ith freewheel switching circuit 00i is specifically used for communicating the freewheel bypass when the relay K1 is switched.
When the ith battery BATi is charged, the control module 04 judges that the ith detection voltage is larger than the first preset value, namely when the charging of the ith battery BATi is completed, the control module 04 generates a switch control signal according to the ith detection voltage, the relay K1 in the ith follow current switching circuit 00i switches the charging loop according to the switch control signal, so that when the charging of the ith battery BAT is stopped, the first follow current module 01 in the ith follow current switching circuit 00i is communicated with the follow current bypass, so that the short cutoff of the charging loop is avoided at the switching moment of the relay K1, and the battery formation effect is improved.
When the ith battery batt is discharged, the control module 04 is specifically configured to generate a switch control signal according to the ith detection voltage when the ith detection voltage is judged to be smaller than the second preset value; the relay K1 in the ith freewheeling switching circuit 00i is specifically configured to switch the discharging circuit according to the switch control signal to stop discharging the ith battery BAT; the second freewheel module 02 in the ith freewheel switching circuit 00i is specifically used to communicate with the freewheel bypass when the relay K1 is switched.
When the ith battery BATi discharges, the control module 04 judges that the ith detection voltage is smaller than the second preset value, namely when the ith battery BATi finishes discharging, the control module 04 generates a switch control signal according to the ith detection voltage, and the relay K1 in the ith follow current switching circuit 00i switches the discharging loop according to the switch control signal so as to stop discharging the ith battery BATi, the second follow current module 02 in the ith follow current switching circuit 00i is communicated with the follow current bypass, so that the short cutoff of the discharging loop is avoided at the switching moment of the relay K1, and the battery formation effect is improved.
When the ith battery BATi is reversely connected, the control module 04 is specifically configured to generate a switch control signal according to the ith detection voltage when the ith detection voltage is judged to be smaller than the third preset value; the relay K1 in the ith freewheeling switching circuit 00i is specifically configured to switch the charge-discharge circuit according to the switch control signal; when the relay K1 is switched, the first freewheel module 01 is connected to the freewheel bypass, and the second freewheel module in the ith freewheel switching circuit 00i is connected to the freewheel bypass, so that the i-th battery bat in reverse connection forms a loop, and a fuse in the first freewheel module 01 is fused.
When the control module 04 judges that the ith detection voltage is smaller than the third preset value, namely the ith battery BATi is reversely connected, the control module 04 generates a switch control signal according to the ith detection voltage, and the relay K1 in the ith follow current switching circuit 00i switches the charging and discharging loop according to the switch control signal so as to stop charging and discharging the ith battery BAT, the first follow current module 01 and the second follow current module 02 in the ith follow current switching circuit 00i are respectively communicated with the follow current bypasses, so that the ith battery BATi, the first follow current module 01 and the second follow current module 02 form a loop to fuse the fuse wire in the first follow current module 01 and prevent current impact from damaging components.
The following further description of the embodiments shown in fig. 1 to 3 is made with reference to the working principle:
the ith detection module 03i detects the voltage of the ith battery batt to generate an ith detection voltage.
As shown in fig. 4, when the ith battery bat is charged, the control module 04 generates a switch control signal according to the ith detection voltage when determining that the ith detection voltage is greater than the first preset value; the relay K1 in the ith freewheeling switching circuit 00i switches the charging loop according to the switch control signal to stop charging the ith battery BAT, and the current flows into the (i-1) th battery BAT through the first diode D1 and the first fuse F1, so that the short cutoff of the charging loop is avoided at the switching moment of the relay K1 in the ith freewheeling switching circuit 00i, and the battery formation effect is improved.
As shown in fig. 5, when the ith battery batt is discharged, the control module 04 generates a switch control signal according to the ith detection voltage when judging that the ith detection voltage is smaller than the second preset value; a relay K1 in the ith freewheeling switching circuit 00i switches the discharging loop according to the switch control signal to stop discharging the ith battery BAT; the current flows into the ith battery bat through the second fuse F2 and the second diode D2; therefore, the short cutoff of a discharging loop is avoided at the switching moment of the relay K1 in the ith follow current switching circuit 00i, and the battery formation effect is improved.
As shown in fig. 6, when the ith battery BAT is reversely connected, the control module 04 generates a switch control signal according to the ith detection voltage when determining that the ith detection voltage is smaller than the third preset value; the relay K1 in the ith freewheel switching circuit 00i switches the charge-discharge loop according to the switch control signal to stop charging and discharging the ith battery BAT, and the ith battery BAT, the first diode D1, the first fuse F1, the second fuse F2 and the second diode D2 form a loop, thereby blowing the first fuse F1 and preventing current impact from damaging components.
The embodiment of the invention comprises a relay, a first follow current module and a second follow current module; the relay switches according to the switch control signal; the first follow current module is communicated with the follow current bypass when the battery is charged and the relay is switched; the second follow current module is communicated with the follow current bypass when the battery discharges and the relay is switched; because the relay carries out the switching of charge and discharge passageway to when stopping to carry out charge and discharge to ith battery, first afterflow module or second afterflow module afterflow switch on the place afterflow bypass, so avoided the cutout when switching charge and discharge return circuit, thereby improved the battery and become the effect.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A freewheel switching circuit characterized in that it comprises:
a relay for switching according to the switch control signal;
the first follow current module is connected with a movable contact of the relay and a first fixed contact of the relay and is used for communicating the follow current bypass when a battery is charged and the relay is switched;
the second follow current module is connected with a movable contact of the relay and a second fixed contact of the relay and is used for communicating the follow current bypass when the battery is discharged and the relay is switched;
the movable contact of the relay, the output end of the first follow current module and the input end of the second follow current module jointly form a third input and output end of the follow current switching circuit; the first stationary contact of the relay and the input end of the first follow current module jointly form a first input and output end of the follow current switching circuit; and the second stationary contact of the relay and the output end of the second follow current module jointly form a second input and output end of the follow current switching circuit.
2. The freewheel switching circuit of claim 1 characterized in that, the first freewheel module comprises a first fuse and a first diode;
the first end of the first fuse is the output end of the first follow current module, the second end of the first fuse is connected with the cathode of the first diode, and the anode of the first diode is the input end of the first follow current module.
3. The freewheel switching circuit of claim 1 characterized in that, the second freewheel module includes a second fuse and a second diode;
the first end of the second fuse is the input end of the second freewheeling module, the second end of the second fuse is connected with the anode of the second diode, and the cathode of the second diode is the output end of the second freewheeling module.
4. A battery formation apparatus comprising n batteries, a power supply module and n freewheel switching circuits according to any one of claims 1-3;
the third input and output end of the ith follow current switching circuit is connected with the anode of the (i-1) th battery and the second input and output end of the (i-1) th follow current switching circuit, the first input and output end of the ith follow current switching circuit is connected with the cathode of the ith battery, the second input and output end of the ith follow current switching circuit is connected with the anode of the ith battery and the third input and output end of the (i + 1) th follow current switching circuit, the third input and output end of the 1 st follow current switching circuit is connected with the anode of the power module, and the second input and output end of the nth follow current switching circuit is connected with the anode of the nth battery and the cathode of the power module;
the battery formation device further includes:
the ith detection module is connected with the ith battery and used for detecting the voltage of the ith battery to generate the ith detection voltage;
the control module is connected with the ith detection module and used for generating an ith control signal according to the ith detection voltage;
wherein i is a natural number not more than n.
5. The battery formation apparatus according to claim 4, wherein, when the ith battery is charged, the control module is specifically configured to generate the switch control signal according to the ith detection voltage when the ith detection voltage is determined to be greater than a first preset value; the relay in the ith follow current switching circuit is specifically used for switching the charging loop according to the switch control signal so as to stop charging the ith battery; the first freewheeling module in the ith freewheeling switching circuit is specifically used for communicating the freewheeling bypass when the relay is switched.
6. The battery formation apparatus according to claim 4, wherein when the ith battery is discharged, the control module is specifically configured to generate the switch control signal according to the ith detection voltage when the ith detection voltage is determined to be smaller than a second preset value; the relay in the ith freewheeling switching circuit is specifically configured to switch the discharging circuit in which the relay is located according to the switch control signal to stop discharging the ith battery; the second freewheel module in the ith freewheel switching circuit is specifically used for communicating the freewheel bypass when the relay is switched.
7. The battery formation apparatus according to claim 4, wherein when the ith battery is reversely connected, the control module is specifically configured to generate the switch control signal according to the ith detection voltage when the ith detection voltage is judged to be smaller than a third preset value; the relay in the ith freewheeling switching circuit is specifically configured to switch the charging and discharging loop according to the switch control signal; when the relay is switched, the first freewheeling module in the ith freewheeling switching circuit is communicated with the freewheeling bypass, and the second switch module in the ith freewheeling switching circuit is communicated with the freewheeling bypass, so that the ith reversely-connected battery forms a loop, and the fuse in the first freewheeling module is fused.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485972.7A CN112054563A (en) | 2019-06-05 | 2019-06-05 | Follow current switching circuit and battery formation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910485972.7A CN112054563A (en) | 2019-06-05 | 2019-06-05 | Follow current switching circuit and battery formation device |
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| CN112054563A true CN112054563A (en) | 2020-12-08 |
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| CN201910485972.7A Pending CN112054563A (en) | 2019-06-05 | 2019-06-05 | Follow current switching circuit and battery formation device |
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Cited By (1)
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