CN218829156U - Battery management system circuit structure, power and electric energy equipment - Google Patents
Battery management system circuit structure, power and electric energy equipment Download PDFInfo
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- CN218829156U CN218829156U CN202222605795.1U CN202222605795U CN218829156U CN 218829156 U CN218829156 U CN 218829156U CN 202222605795 U CN202222605795 U CN 202222605795U CN 218829156 U CN218829156 U CN 218829156U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model is suitable for an electronic circuit technical field specifically provides a battery management system circuit structure, power and electric energy equipment, and the circuit structure includes the switch array, including total switch and a plurality of switch units; the output end of the battery sampling circuit is connected with the control chip, and the input end of the battery sampling circuit is respectively connected with each single battery of the battery pack through a plurality of switch units; and the switch driving circuit is connected with the control chip and the switch array and used for receiving the control signal output by the control chip and outputting a driving signal to the main power switch and the plurality of switch units. The utility model discloses when battery management system broke down, the disconnection of connection between control battery and the battery management system, unable return circuit that forms between battery and the battery management system to can avoid the battery to cross putting, in addition, each components and parts among the battery management system also do not have the voltage and the electric current that last and exist, avoid the trouble to stretch accident occurrences such as explosion on fire even, protection power safety.
Description
Technical Field
The utility model belongs to the technical field of electronic circuit, especially, relate to a battery management system circuit structure, power and electric energy equipment.
Background
Most of power supplies in the market are provided with a BMS (Battery Management System), a single Battery in the power supply is electrically connected with the Battery Management System through a Battery sampling line, the Battery Management System can collect relevant information of the Battery, such as voltage, current and the like, through the Battery sampling line, and control charging and discharging of the Battery according to the information obtained by sampling, so that overcharge or overdischarge of the Battery is avoided, and the safety of the Battery is protected.
When a power supply fails, for example, an AFE circuit or an equalizer circuit fails, the conventional method is to close a discharge or charge total loop of a battery, and to warn or report the failure. Still, partial circuit is not disconnected, so that components on the battery management system still have continuous voltage and current, the energy of the battery is continuously released, the over-discharge condition of the battery is caused, meanwhile, the continuous heating of the components can also cause more serious faults, and accidents such as smoking and even firing occur.
SUMMERY OF THE UTILITY MODEL
The utility model provides a battery management system circuit structure, it has not the disconnection to lead to the battery to have the excess to put and components and parts continuously generate heat and lead to the problem that the fault stretchs to solve among the prior art battery management system rear portion circuit that breaks down.
The utility model discloses a realize like this, a battery management system circuit structure, include:
a switch array including a main power switch and a plurality of switch units;
the output end of the battery sampling circuit is connected with the control chip, and the input end of the battery sampling circuit is respectively connected with each single battery of the battery pack through a plurality of switch units;
and the switch driving circuit is connected with the control chip and the switch array and used for receiving the control signal output by the control chip and outputting a driving signal to the main power switch and the plurality of switch units.
Further, the circuit structure further comprises a main power supply trigger circuit connected with the main power supply switch.
Further, the main power switch comprises a main switch input end, a main switch output end, a driving input end and a starting input end;
the input end of the main switch is connected with the positive end of the battery pack;
the output end of the main switch is connected with the power supply end of the control chip;
the driving input end is connected with the switch driving circuit;
the starting input end is connected with the main power supply trigger circuit.
Further, the circuit structure also comprises a self-checking circuit connected with the control chip.
Further, the group battery includes N monomer batteries that establish ties in proper order, and the switch array includes N +1 switch unit, and the one end of N +1 switch unit is connected with the monomer battery that corresponds respectively, and the other end is connected with switch drive circuit.
Further, the driving terminals of the N +1 switch units are all connected to the driving signal output terminal of the switch driving circuit.
Further, the switching unit includes at least one of a transistor, a relay, and a controllable fuse.
In a second aspect, the present application further provides a power supply comprising:
the battery pack comprises a plurality of single batteries which are sequentially connected in series; and
the battery management system is electrically connected with the battery pack;
the battery management system adopts the circuit structure of the battery management system.
In a third aspect, the present application also provides an electric energy device comprising a power supply as described above.
Further, the electric energy equipment comprises any one of a shared power exchange cabinet, a new energy automobile and an electric energy storage device.
The beneficial effects of the utility model reside in that, through set up the switch array between battery sampling circuit and group battery, the switch array includes total switch and a plurality of switch unit, wherein battery sampling circuit's output and control chip are connected, battery sampling circuit's input is connected with each battery cell of group battery respectively through a plurality of switch unit, total switch and a plurality of switch unit still are connected with switch drive circuit, when battery management system breaks down, control chip detects trouble output control signal to switch drive circuit, then switch drive circuit output drive signal to total switch and a plurality of switch unit, with the connection between disconnection battery and the battery management system, can't form return circuit between battery and the battery management system, thereby can avoid the battery to put excessively, in addition, each components and parts in the battery management system also can not have lasting voltage and electric current and exist, avoid spreading accident such as trouble even firing explosion, protection power safety.
Drawings
FIG. 1 is a schematic circuit block diagram of one embodiment of a circuit configuration of a battery management system of the present application;
fig. 2 is a schematic circuit diagram of an embodiment of the circuit structure of the battery management system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides a when detecting the trouble, disconnection battery and battery management system between be connected, can't form the return circuit between battery and the battery management system to can avoid the battery to cross putting, in addition, each components and parts among the battery management system also can not have lasting voltage and electric current and exist, avoid the trouble to stretch accident such as explosion on fire even, protection power safety.
Example one
As shown in fig. 1 to fig. 2, the present embodiment provides a circuit structure of a battery management system, including:
a switch array 100 including a main power switch 101 and a plurality of switch units;
the output end of the battery sampling circuit 200 is connected with the control chip U1, and the input end of the battery sampling circuit 200 is respectively connected with each single battery of the battery pack 600 through a plurality of switch units;
the switch driving circuit 300 is connected to the control chip U1 and the switch array 100, and is configured to receive the control signal output by the control chip U1 and output a driving signal to the main power switch 101 and the plurality of switch units.
In implementation, the circuit structure of the battery management system provided in the present application is applied to a battery management system, where the battery management system includes but is not limited to a control chip U1 and a battery sampling circuit 200, and the control chip U1 is a main control chip of the battery management system, and is not described herein again.
In a conventional scheme, the battery sampling circuit 200 includes a plurality of sampling lines electrically connected to the single batteries of the battery pack 600. Alternatively, the single batteries in the battery pack 600 are sequentially connected in series to form a series connection body, and the plurality of battery sampling lines are respectively connected with the corresponding single batteries. Illustratively, taking the battery pack 600 including N single cells as an example, the battery pack 600 includes a battery BT1, a battery BT2, \8230- \8230, and a battery BTn, wherein a negative electrode of the battery BT1 serves as a negative terminal B-of the battery pack 600 and is grounded, a positive electrode of the battery BT1 is connected with a negative electrode of the battery BT2, and so on until a positive electrode of the battery BTn outputs a voltage signal for connecting with an external load (not shown).
Optionally, the battery sampling circuit 200 includes N +1 sampling lines, which are respectively a sampling line B0, a sampling line B1, a sampling line B2, a sampling line 8230, a sampling line Bn-1 and a sampling line Bn, where the sampling line B0 is connected to the negative electrode of the battery BT1, the sampling line B1 is connected to the negative electrode of the battery BT2, the sampling line B2 is connected to the positive electrode of the battery BT2, and so on, the sampling line Bn-1 is connected to the negative electrode of the battery BTn, and the sampling line Bn is connected to the positive electrode of the battery BTn.
The battery sampling circuit 200 respectively collects the voltage and the current of each single battery through a plurality of sampling lines and then outputs the voltage and the current to the control chip U1.
The battery management system circuit structure provided by the application further comprises a switch array 100 and a switch driving circuit 300, wherein two ends of a main power switch 101 of the switch array 100 are respectively connected with the positive electrode of the battery BTn and the control chip U1, so that the battery pack 600 can supply power to the control chip U1 through the main power switch 101.
Each switch unit of the switch array 100 is disposed on a route of a sampling line, and for example, the sampling line includes a sampling line B0, a sampling line B1, a sampling line B2, \8230 \ 8230;, a sampling line Bn-1, and a sampling line Bn, and the switch units of the switch array 100 include N +1, specifically, a switch unit K1, a switch unit K2, a switch unit K3, \8230;, a switch unit Kn, and a switch unit Kn +1, wherein the switch unit K1 is disposed on the route of the sampling line B0, the switch unit K2 is disposed on the route of the sampling line B1, and so on until the switch unit Kn +1 is disposed on the route of the sampling line Bn. Specifically, one end of the switch unit K1 is connected to the negative electrode of the battery BT1, the other end of the switch unit K1 is connected to the sampling line B0 of the battery sampling circuit 200, one end of the switch unit K2 is connected to the negative electrode of the battery BT2, the other end of the switch unit K2 is connected to the sampling line B1 of the battery sampling circuit 200, one end of the switch unit K3 is connected to the positive electrode of the battery BT2, the other end of the switch unit K3 is connected to the sampling line B2 of the battery sampling circuit 200, and so on until one end of the switch unit Kn is connected to the negative electrode of the battery BTn, the other end of the switch unit Kn is connected to the sampling line Bn-1 of the battery sampling circuit 200, one end of the switch unit Kn +1 is connected to the positive electrode of the battery BTn, and the other end of the switch unit Kn +1 is connected to the sampling line Bn of the battery sampling circuit 200.
Alternatively, the switching unit may employ a transistor or a relay, wherein the transistor includes, but is not limited to, a triode and a MOS transistor. It should be noted that the switch unit is not limited to the above various types of components, and in other embodiments, the switch unit may also use other electrical signal control components, for example, the switch unit may use a controllable fuse, and is not limited specifically herein.
In implementation, the switch driving circuit 300 is connected to the control chip U1, and may receive a control signal output by the control chip U1, and the switch driving circuit 300 is further connected to the switch array 100, specifically, the switch driving circuit 300 is connected to the main power switch 101 and the plurality of switch units, so as to output a driving signal to the main power switch 101 and the plurality of switch units, so as to control on/off of the main power switch 101 and each switch unit.
In some possible embodiments, during the normal operation of the battery pack 600 and the battery management system, the control chip U1 collects the voltage and current information of the battery pack 600 and each battery cell through the battery sampling circuit 200 to maintain the power supply to operate in a safe state. When the battery management system detects a fault, for example, a hardware damage of the battery management system, a sampling line disconnection or a battery cell failure, the control chip U1 controls the main power switch 101 and each switch unit to turn off the output through the switch driving circuit 300, and at this time, the battery management system is completely disconnected from the battery pack 600, so that the overdischarge of the battery is avoided, and the fault spreading is avoided.
According to the battery management system, the switch array 100 is arranged between the battery sampling circuit 200 and the battery pack 600, the switch array 100 comprises a main power switch 101 and a plurality of switch units, wherein the output end of the battery sampling circuit 200 is connected with the control chip U1, the input end of the battery sampling circuit 200 is respectively connected with each single battery of the battery pack 600 through the plurality of switch units, the main power switch 101 and the plurality of switch units are further connected with the switch driving circuit 300, when the battery management system breaks down, the control chip U1 detects that a fault outputs a control signal to the switch driving circuit 300, then the switch driving circuit 300 outputs a driving signal to the main power switch 101 and the plurality of switch units so as to break off the connection between the battery and the battery management system, a loop cannot be formed between the battery and the battery management system, thereby the over-discharge of the battery can be avoided, in addition, each component in the battery management system cannot have continuous voltage and current, the accidents such as fault spreading and even fire explosion are avoided, and the safety of the power supply is protected.
Example two
In some alternative embodiments, the battery management system circuit structure provided by the present application further includes a main power trigger circuit 400 connected to the main power switch 101.
In implementation, the main power trigger circuit 400 may output a main power driving signal, specifically, when the battery management system detects an abnormality, the main control chip U1 controls all the switch units and the main power switch 101 to turn off the output through the switch driving circuit 300, and at this time, the battery management system and the battery are completely disconnected.
Optionally, the main power switch 101 includes a main switch input terminal, a main switch output terminal, a driving input terminal, and a start input terminal;
the input end of the main switch is connected with the positive electrode end B + of the battery pack 600;
the output end of the main switch is connected with a power supply end VCC of the control chip U1;
the driving input end is connected with the switch driving circuit 300;
the start input is connected to the mains triggering circuit 400.
After the battery management system is maintained, the battery management system is powered on again, the main power supply trigger circuit 400 is manually controlled to output a main power supply driving signal to the main power supply switch 101, so that the main power supply switch 101 is turned on again, the control chip U1 and the self-detection unit of the battery management system are powered on again for self-detection, and if no fault is detected, the control chip U1 turns on each switch unit again through the switch driving circuit 300.
In some embodiments, the main power trigger circuit 400 may also be controlled by an electrical signal, for example, when the battery pack 600 is reconnected to the battery management system after the battery management system is repaired, the electrical signal is sent to the main power trigger circuit 400, at this time, the main power trigger circuit 400 outputs a main power driving signal to the main power switch 101, so that the main power switch 101 is turned on again, the control chip U1 and the self-checking unit of the battery management system are powered on again for self-checking, and if no fault is detected, the control chip U1 turns on each switching unit again through the switch driving circuit 300.
EXAMPLE III
In some optional embodiments, the battery management system circuit structure provided in the present application further includes a self-test circuit 500 connected to the control chip U1.
In implementation, the self-test circuit 500 is used for functional tests of the battery management system, such as voltage data collection, current data collection, output/input and state parameter self-test. The voltage data acquisition includes but is not limited to acquiring the total voltage of the battery pack, the voltage of each single battery and the voltage of all or part of components in the battery management system; the current data acquisition includes but is not limited to the charging and discharging current of the battery pack and the current of all or part of components in the battery management system; the self-checking of the input/output and status parameters includes, but is not limited to, output/output port function detection, battery management system hardware damage detection, line damage detection, and temperature detection, and the like, which is not limited herein.
In some embodiments, the battery sampling circuit 200 may be a part of the self-test circuit 500, and the self-test circuit 500 may collect voltage and current data of the battery pack and each single battery through a sampling line of the battery sampling circuit 200, which is not described herein again.
Example four
In some optional embodiments, the battery pack 600 includes N single batteries connected in series in sequence, the switch array includes N +1 switch units, one end of each of the N +1 switch units is connected to a corresponding single battery, and the other end is connected to the switch driving circuit 300. Specifically, the switch units further include driving terminals, and the driving terminals of the switch units are simultaneously connected to the driving signal output terminal t1 of the switch driving circuit 300.
In implementation, the switch driving circuit 300 only needs one driving signal output end t1 to control on/off of all the switch units, and optionally, the driving end of the main power switch 101 may also be connected to the driving signal output end t1, so that the circuit structure can be effectively simplified.
EXAMPLE five
In some optional embodiments, the present application further provides a power supply comprising:
a battery pack 600 including a plurality of unit batteries connected in series in sequence; and
a battery management system electrically connected to the battery pack 600;
the battery management system adopts the circuit structure of the battery management system.
Optionally, the circuit structure of the battery management system includes a switch array 100, a battery sampling circuit 200 and a switch driving circuit 300, wherein the relay 100 includes a main power switch 101 and a plurality of switch units; the output end of the battery sampling circuit 200 is connected with the control chip U1, and the input end of the battery sampling circuit 200 is connected with each single battery of the battery pack 600 through a plurality of switch units; the switch driving circuit 300 is connected to the control chip U1 and the switch array 100, and is configured to receive the control signal output by the control chip U1 and output a driving signal to the main power switch 101 and the plurality of switch units.
In implementation, the circuit structure of the battery management system can be regarded as a battery management system, and in the normal working process of the battery pack 600 and the battery management system, the control chip U1 collects the voltage and current information of the battery pack 600 and each single battery through the battery sampling circuit 200 to maintain the power supply to work in a safe state.
When the battery management system detects a fault, for example, a hardware damage of the battery management system, a sampling line disconnection or a battery cell failure, the control chip U1 controls the main power switch 101 and each switch unit to turn off the output through the switch driving circuit 300, and at this time, the battery management system is completely disconnected from the battery pack 600, so that the overdischarge of the battery is avoided, and the fault spreading is avoided.
According to the battery management system, the switch array 100 is arranged between the battery sampling circuit 200 and the battery pack 600, the switch array 100 comprises a main power switch 101 and a plurality of switch units, wherein the output end of the battery sampling circuit 200 is connected with the control chip U1, the input end of the battery sampling circuit 200 is respectively connected with each single battery of the battery pack 600 through the plurality of switch units, the main power switch 101 and the plurality of switch units are further connected with the switch driving circuit 300, when the battery management system breaks down, the control chip U1 detects that a fault outputs a control signal to the switch driving circuit 300, then the switch driving circuit 300 outputs a driving signal to the main power switch 101 and the plurality of switch units so as to break off the connection between the battery and the battery management system, a loop cannot be formed between the battery and the battery management system, thereby the over-discharge of the battery can be avoided, in addition, each component in the battery management system cannot have continuous voltage and current, the accidents such as fault spreading and even fire explosion are avoided, and the safety of the power supply is protected.
It is clear to those skilled in the art that, for convenience and brevity of description, the structures and implementation principles of the power supply described above may refer to the corresponding structures and implementation principles in the first to fourth embodiments, and are not described herein again.
EXAMPLE six
In some alternative embodiments, the present application further provides a power device comprising a power source as described above.
In implementation, the electric energy device may be an electric consumption device, such as a new energy automobile, in other embodiments, the electric energy device may also be an energy storage device, such as a backup power station, and in some possible embodiments, the electric energy device may also be another apparatus, such as a shared power exchange cabinet.
The electric energy equipment is provided with the power supply, in some embodiments, the power supply can be fixedly installed on the electric energy equipment, for example, the power supply of the new energy automobile is a power battery, the load is a motor, and the power battery supplies power to the motor to drive the motor to rotate, so as to drive the new energy automobile to run.
In some possible embodiments, the power source may be detachably mounted with the electric energy device, for example, the shared power exchange cabinet is provided with a battery charging point, and the battery may be inserted into the battery charging point for charging and may be removed after the charging is completed, which is not described herein again.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the structures and implementation principles of the electric energy devices described above may refer to the corresponding structures and implementation principles in the first to fifth embodiments, and are not described herein again.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A battery management system circuit arrangement, comprising:
a switch array including a main power switch and a plurality of switch units;
the output end of the battery sampling circuit is connected with the control chip, and the input end of the battery sampling circuit is respectively connected with each single battery of the battery pack through the plurality of switch units;
and the switch driving circuit is connected with the control chip and the switch array and used for receiving the control signal output by the control chip and outputting a driving signal to the main power switch and the switch units.
2. The battery management system circuit arrangement of claim 1, wherein the circuit arrangement further comprises a mains triggering circuit connected to the mains switch.
3. The battery management system circuit arrangement of claim 2, wherein the master power switch comprises a master switch input, a master switch output, a drive input, and an enable input;
the input end of the main switch is connected with the positive end of the battery pack;
the output end of the main switch is connected with the power supply end of the control chip;
the driving input end is connected with the switch driving circuit;
the starting input end is connected with the main power supply trigger circuit.
4. The battery management system circuit arrangement of claim 1, wherein the circuit arrangement further comprises a self-test circuit connected to the control chip.
5. The circuit structure of battery management system according to claim 1, wherein the battery pack includes N single batteries connected in series in sequence, the switch array includes N +1 switch units, one end of each of the N +1 switch units is connected to a corresponding single battery, and the other end of each of the N +1 switch units is connected to the switch driving circuit.
6. The battery management system circuit structure of claim 5, wherein the driving terminals of the N +1 switch units are all connected to the driving signal output terminal of the switch driving circuit.
7. The battery management system circuit structure according to any one of claims 1 to 6, wherein the switching unit includes at least one of a transistor, a relay, and a controllable fuse.
8. A power supply, comprising:
the battery pack comprises a plurality of single batteries which are sequentially connected in series; and
the battery management system is electrically connected with the battery pack;
the battery management system adopts a battery management system circuit structure according to any one of claims 1 to 7.
9. An electrical energy device, characterized in that the electrical energy device comprises a power supply according to claim 8.
10. The electrical energy device of claim 9, wherein the electrical energy device comprises any one of a shared power conversion cabinet, a new energy automobile, and an electrical energy storage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222605795.1U CN218829156U (en) | 2022-09-30 | 2022-09-30 | Battery management system circuit structure, power and electric energy equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222605795.1U CN218829156U (en) | 2022-09-30 | 2022-09-30 | Battery management system circuit structure, power and electric energy equipment |
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| CN218829156U true CN218829156U (en) | 2023-04-07 |
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| CN202222605795.1U Active CN218829156U (en) | 2022-09-30 | 2022-09-30 | Battery management system circuit structure, power and electric energy equipment |
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- 2022-09-30 CN CN202222605795.1U patent/CN218829156U/en active Active
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