CN210617861U - Intelligent battery pack and electric automobile - Google Patents
Intelligent battery pack and electric automobile Download PDFInfo
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- CN210617861U CN210617861U CN201921624171.6U CN201921624171U CN210617861U CN 210617861 U CN210617861 U CN 210617861U CN 201921624171 U CN201921624171 U CN 201921624171U CN 210617861 U CN210617861 U CN 210617861U
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Abstract
The utility model discloses an intelligent battery group and electric automobile, wherein, the intelligent battery group includes the group battery, the discharge switch, control circuit and fingerprint sampler constitute intelligent battery group, fingerprint sampler is used for gathering user's fingerprint information, when user's fingerprint information matches with the fingerprint information that prestores, confirm current user's identity, export first trigger signal to control circuit, control circuit is when receiving first trigger signal, output switch control signal control discharge switch switches on, the group battery activation begins to supply power for the load, the user need not to carry the key switch and can activate the group battery, convenience of customers manages, electric automobile's theftproof security has been improved simultaneously.
Description
Technical Field
The utility model relates to an electric automobile technical field, in particular to intelligent battery pack and electric automobile.
Background
With the development of electric vehicles, battery technology has been rapidly improved. The high energy of lithium batteries also carries the risk of explosive combustion. Most of the traditional battery pack activation work is simply activated and discharged through a key switch, and the identity of a user is not recognized. And when managing a plurality of cars simultaneously, it is very inconvenient to need to carry a large amount of car keys simultaneously.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing an intelligent battery pack aims at solving above-mentioned technical problem.
In order to achieve the purpose, the utility model provides an intelligent battery pack which comprises a battery pack, a discharge switch, a control circuit and a fingerprint collector;
the battery pack, the discharge switch and the load are sequentially connected, the controlled end of the discharge switch is connected with the control end of the control circuit, and the signal end of the fingerprint collector is connected with the control end of the control circuit;
the fingerprint collector is used for collecting user fingerprint information and outputting a first trigger signal to the control circuit when the user fingerprint information is matched with prestored fingerprint information;
and the control circuit outputs a switch control signal to the discharge switch when receiving the first trigger signal so as to control the conduction of the discharge switch, so that the battery pack provides a working power supply for the load.
Preferably, the intelligent battery pack further comprises a sampling circuit, and a signal end of the sampling circuit is connected with a signal end of the control circuit;
the sampling circuit is used for sampling the working parameters of the battery pack and outputting sampling signals to the control circuit;
the control circuit is further used for comparing the sampling signal with a preset working threshold value, and controlling the discharge switch to be switched on according to the first trigger signal when the sampling signal is within the preset working threshold value.
Preferably, the battery pack comprises a plurality of single batteries connected in series and parallel, the sampling circuit comprises a current sampling circuit, a voltage sampling circuit and a temperature sampling circuit, and signal ends of the current sampling circuit, the voltage sampling circuit and the temperature sampling circuit are respectively connected with a signal end of the control circuit;
the current sampling circuit is used for sampling the charging or discharging current of the battery pack and outputting a current sampling signal to the control circuit;
each voltage sampling circuit is used for sampling the working voltage of each single battery and respectively outputting a plurality of voltage sampling signals to the control circuit;
each temperature sampling circuit is used for sampling the temperature and/or the ambient temperature of each single battery and outputting a temperature sampling signal to the control circuit.
Preferably, the intelligent battery pack further comprises a load detection circuit and a load power supply end, the load is connected with the discharge switch through the load power supply end, the detection end of the load detection circuit is connected with the load power supply end, and the signal end of the load detection circuit is connected with the signal end of the control circuit;
the load detection circuit is used for detecting whether a load is connected with a load power supply end or not and outputting a second trigger signal to the control circuit when the load is connected with the load power supply end;
the control circuit is further used for acquiring a sampling signal output by the sampling circuit when the second trigger signal is received, comparing the sampling signal with a corresponding preset working threshold value, and controlling the discharge switch to be switched on after the sampling signal is at the preset working threshold value and the first trigger signal is acquired.
Preferably, the load detection circuit includes a first resistor, a first diode, a first zener diode, a second zener diode, a third zener diode, a first switch tube, a second switch tube, and a first operating voltage input terminal;
the first end of the first resistor is connected with the power supply end of the load, the second end of the first resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the cathode of the first voltage-stabilizing diode, the anode of the first voltage-stabilizing diode, the controlled end of the first switch tube, the controlled end of the second switch tube and the cathode of the second voltage-stabilizing diode are interconnected, the anode of the second voltage-stabilizing diode is connected with the cathode of the third voltage-stabilizing diode, the anode of the third voltage-stabilizing diode and the output end of the second switch tube are all grounded, the input end of the first switch tube is connected with the first working voltage input end, the output end of the first switch tube is connected with the input end of the second switch tube, and the connection node is the signal end of the load detection circuit.
Preferably, the intelligent battery pack further comprises a charging interface, a charging switch and a charging detection circuit, wherein the charging interface is connected with a power supply end of the battery pack through the charging switch, a detection end of the charging detection circuit is connected with the charging interface, and a signal end of the charging detection circuit is connected with the control circuit;
the charging detection circuit is used for outputting a third trigger signal to the control circuit when the charging interface is connected with a charger;
the control circuit is further used for obtaining a sampling signal output by the sampling circuit after receiving the third trigger signal, comparing the sampling signal with a corresponding preset working threshold value, and controlling the charging switch to be switched on when the sampling signal is in the preset working threshold value.
Preferably, the charging detection circuit comprises a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, an optical coupler and a first working voltage input end;
the first end of first electric capacity the positive pole of opto-coupler is connected and the interface that charges interconnects, the second end of first electric capacity the first end of second resistance reaches the negative pole of opto-coupler interconnects, the second end ground connection of second resistance, the collecting electrode of opto-coupler with first operating voltage input is connected, the projecting pole of opto-coupler the first end of third resistance reaches the first end of fourth resistance interconnects, the second end of third resistance with the first end of second electric capacity is connected and the connected node does charge detection circuitry's signal end, the second end of fourth resistance with the second of second electric capacity is held all ground connection.
Preferably, the sampling circuit further comprises a voltage equalization circuit, the voltage equalization circuit is connected between power supply ends of two adjacent single batteries, and a controlled end of the voltage equalization circuit is connected with the control circuit;
the control circuit is used for outputting a control signal to the voltage balancing circuit when the voltage difference between two adjacent single batteries is greater than a preset voltage;
and the voltage balancing circuit is used for starting when receiving the control signal and carrying out voltage balancing processing on the voltages of the two adjacent single batteries.
Preferably, the control circuit includes a battery management chip and a microprocessor, a signal end of the battery management chip is respectively connected with a signal end of the sampling circuit, a controlled end of the charging switch, a controlled end of the discharging switch, a controlled end of the voltage balancing circuit and a signal end of the microprocessor, and the microprocessor is further connected with the charging detection circuit and the load detection circuit;
the battery management chip is used for acquiring a sampling signal of a sampling circuit, sending the sampling signal to the microprocessor, and correspondingly controlling the charging switch, the discharging switch and the voltage equalization circuit to work according to a control signal of the microprocessor;
the microprocessor is used for acquiring the first trigger signal, the second trigger signal, the third trigger signal and the sampling signal, comparing the sampling signal with a corresponding preset working threshold value, and correspondingly outputting a control signal to the battery management chip.
The utility model also provides an electric automobile, this electric automobile include as above intelligent battery group.
The utility model discloses technical scheme is through adopting the group battery, the discharge switch, control circuit and fingerprint sampler constitute intelligent battery group, fingerprint sampler is used for gathering user's fingerprint information, when user's fingerprint information matches with the fingerprint information that prestores, confirm current user's identity, export first trigger signal to control circuit, control circuit is when receiving first trigger signal, output switch control signal control discharge switch switches on, the group battery activation begins to supply power for the load, the user need not to carry the key switch and can activate the group battery, convenience of customers manages, electric automobile's theftproof security has been improved simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a first embodiment of an intelligent battery pack according to the present invention;
fig. 2 is a schematic block diagram of a second embodiment of the intelligent battery pack of the present invention;
fig. 3 is a schematic block diagram of a third embodiment of the intelligent battery pack of the present invention;
fig. 4 is a schematic circuit diagram of an embodiment of a load detection circuit in an intelligent battery pack according to the present invention;
fig. 5 is a schematic circuit diagram of an embodiment of a charging detection circuit in an intelligent battery pack according to the present invention;
fig. 6 is a schematic block diagram of a fourth embodiment of the intelligent battery pack of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that the description relating to "first", "second", etc. in the present invention is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises a scheme A, a scheme B or a scheme A and a scheme B which are simultaneously met, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be realized by a person with ordinary skill in the art as a basis, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The utility model provides an intelligent battery pack 100 for electric automobile.
As shown in fig. 1, fig. 1 is a schematic block diagram of an embodiment of an intelligent battery pack 100 of the present invention, wherein the intelligent battery pack 100 includes a battery pack 10, a discharge switch 20, a control circuit 30, and a fingerprint acquirer 40;
the battery pack 10, the discharge switch 20 and the load 200 are sequentially connected, the controlled end of the discharge switch 20 is connected with the control end of the control circuit 30, and the signal end of the fingerprint collector 40 is connected with the control end of the control circuit 30;
the fingerprint collector 40 is used for collecting user fingerprint information and outputting a first trigger signal to the control circuit 30 when the user fingerprint information is matched with the pre-stored fingerprint information;
the control circuit 30 outputs a switch control signal to the discharge switch 20 when receiving the first trigger signal, so as to control the discharge switch 20 to be turned on, so that the battery pack 10 provides the load 200 with operating power.
In this embodiment, the fingerprint acquisition device 40 adopts a high-performance optical fingerprint identification module and is internally provided with a DSP operation unit. When a finger is recognized to be placed on the sensor, the fingerprint surface texture image on the sensor is collected and converted into data to be compared with the fingerprint information prestored in the fingerprint database in a traversing mode, if the consistent point is larger than 95%, the data passes verification, a trigger signal is sent to the control circuit 30, the control circuit 30 and the battery pack 10 are activated, the control circuit 30 controls the discharge switch 20 to be conducted, otherwise, the control circuit fails, the battery pack 10 is not activated, and the discharge switch 20 is controlled to be kept in a turn-off state.
The battery pack 10 may include a plurality of battery modules or single batteries connected in series and parallel, the load 200 may be a motor, an air conditioner, a vehicle-mounted terminal, and the like, it can be understood that when the load 200 is different or the voltage levels/types of the battery pack 10 and the load 200 are different, a corresponding power conversion circuit may be further disposed between the battery pack 10 and the load 200 to perform voltage conversion, so as to provide a required working power supply for the load 200, and the power conversion circuit may be one or a combination of a buck-boost circuit, a voltage stabilizing circuit, an inverter circuit, and the like, which is not limited herein.
Meanwhile, the discharge switch 20 includes at least one controlled switch, that is, the controlled switch is turned on and off correspondingly according to the control signal, the controlled switch may be a relay, a field effect transistor, a triode, an IGBT, and the like, and the discharge switch 20 further includes an output protection circuit, for example, a pre-charge circuit, which outputs a relatively large impedance to reduce the discharge current of the battery pack 10 when the battery pack 10 is discharged, so as to reduce the impact of a large current on the load 200, and is turned off after the discharge preset time, so that the current of the battery pack 10 is directly output to the load 200, thereby improving the safety of discharge.
The control circuit 30 can be at least one of the microprocessor 32 and the battery management chip 31, and the control circuit 30 correspondingly controls the discharge switch 20 to be switched on according to the trigger signal output by the fingerprint collector 40 when fingerprints are matched, so that a working power supply is provided for the load 200, the electric automobile can be driven normally, the electric automobile can be started without a key switch, the electric automobile is convenient to manage, and meanwhile, the anti-theft safety is improved.
The utility model discloses technical scheme is through adopting group battery 10, discharge switch 20, control circuit 30 and fingerprint sampler 40 constitute intelligent battery group 100, fingerprint sampler 40 is used for gathering user's fingerprint information, when user's fingerprint information matches with the fingerprint information that prestores, confirm current user's identity, export first trigger signal to control circuit 30, control circuit 30 is when receiving first trigger signal, output switch control signal control discharge switch 20 switches on, group battery 10 activation begins to be the power supply of load 200, the user need not to carry the key switch and can activate group battery 10, convenience of customers manages, electric automobile's theftproof security has been improved simultaneously.
In one embodiment, as shown in fig. 2, the intelligent battery pack 100 further includes a sampling circuit 50, and a signal terminal of the sampling circuit 50 is connected to a signal terminal of the control circuit 30;
the sampling circuit 50 is used for sampling the working parameters of the battery pack 10 and outputting sampling signals to the control circuit 30;
the control circuit 30 is further configured to compare the sampling signal with a preset working threshold, and control the discharge switch 20 to be turned on according to the first trigger signal when the sampling signal is within the preset working threshold.
In this embodiment, the sampling circuit 50 is configured to sample an operating parameter of the battery pack 10, for example, at least one operating parameter of a voltage and a current of the battery pack 10, a voltage and a current of a single battery, a temperature, an ambient temperature, and a remaining capacity of the battery pack 10, and in order to improve safety, the control circuit 30 needs to calculate and compare each operating parameter of the battery pack 10 while controlling the discharge switch 20 to be turned on, so as to determine whether each operating parameter of the battery pack 10 is within a preset operating threshold, and only when determining that each operating parameter of the battery pack 10 is within the preset operating threshold and receiving a first trigger signal, the discharge switch 20 is controlled to be turned on, it should be noted that the control circuit 30 needs to simultaneously satisfy two conditions for turning on the discharge switch 20, that is, whether the first trigger signal is received, and whether each operating parameter of the battery pack 10 is within the preset operating threshold, the order of the two condition judgments is not limited, and it may be judged whether the first trigger signal is received and then whether each operating parameter of the battery pack 10 is within the preset operating threshold, or it may be judged whether each operating parameter of the battery pack 10 is within the preset operating threshold and then whether the first trigger signal is received, which is not specifically limited herein.
In one embodiment, as shown in fig. 3, the battery pack 10 includes a plurality of single batteries connected in series and parallel, the sampling circuit 50 includes a current sampling circuit, a voltage sampling circuit, and a temperature sampling circuit, and signal terminals of the current sampling circuit, the voltage sampling circuit, and the temperature sampling circuit are respectively connected to a signal terminal of the control circuit 30;
a current sampling circuit for sampling a charging or discharging current of the battery pack 10 and outputting a current sampling signal to the control circuit 30;
each voltage sampling circuit is used for sampling the working voltage of each single battery and respectively outputting a plurality of voltage sampling signals to the control circuit 30;
each temperature sampling circuit is configured to sample a temperature and/or an ambient temperature of each battery cell and output a temperature sampling signal to the control circuit 30.
In this embodiment, the intelligent battery pack 100 further includes a charging interface 80 connected to the battery pack, the current sampling circuit 51 may include a sampling resistor, and the voltage across the sampling resistor is sampled, so as to obtain the charging or discharging current of the battery pack 10, and meanwhile, the sampled current sampling signal is sent to the control circuit 30, and the control circuit 30 may perform AD conversion on the current sampling signal, so as to obtain the current parameter of the battery pack 10 during charging and discharging.
Meanwhile, each voltage sampling circuit can be composed of a divider resistor or a voltage transformer, each voltage sampling circuit samples the voltage of each single battery, the control circuit 30 obtains a plurality of voltage sampling signals and calculates and processes the voltage, and the plurality of voltage sampling signals can be calculated to obtain the total voltage of the battery pack 10, so that the voltage sampling circuit does not need to be additionally arranged to obtain the total voltage of the battery pack 10, and the design cost is reduced.
And the temperature sampling circuit can be a temperature sensor, the temperature sensor can be attached to the surface of the single battery, the control circuit 30 determines the voltage of each single battery according to the temperature signal fed back by the temperature sensor, and meanwhile, one or more temperature sampling circuits can be arranged in the environment where the battery pack 10 is located, so that the environmental temperature of the battery pack 10 can be sampled, the monitoring precision is improved, and the battery damage caused by overhigh battery temperature and/or environmental temperature can be avoided.
In one embodiment, as shown in fig. 2 and 4, the intelligent battery pack 100 further includes a load detection circuit 60 and a load power terminal OUT, the load 200 is connected to the discharge switch 20 via the load power terminal OUT, the detection terminal of the load detection circuit 60 is connected to the load power terminal OUT, and the signal terminal of the load detection circuit 60 is connected to the signal terminal of the control circuit 30;
the load detection circuit 60 is configured to detect whether the load 200 is connected to the load power source terminal OUT, and output a second trigger signal to the control circuit 30 when the load 200 is connected to the load power source terminal OUT;
the control circuit 30 is further configured to obtain a sampling signal output by the sampling circuit 50 when the second trigger signal is received, compare the sampling signal with a corresponding preset working threshold, and control the discharge switch 20 to be turned on after the sampling signal is within the preset working threshold and the first trigger signal is obtained.
In this embodiment, the load detection circuit 60 detects whether the load 200 is connected in real time, after the control circuit 30 is activated, before controlling the discharge switch 20 to be turned on, it needs to be determined whether the current intelligent battery pack 100 meets the discharge requirement, that is, whether the load 200 is connected to the load power supply terminal OUT and whether the sampling signal is within the preset working threshold, when each discharge requirement is met, the control circuit 30 controls the discharge switch 20 to be turned on to provide a working power supply for the load 200, and when one discharge requirement is not met, the discharge switch 20 is controlled to keep the off state.
In one embodiment, the load detection circuit 60 includes a first resistor R1, a first diode D1, a first zener diode D2, a second zener diode D3, a third zener diode D4, a first switch tube Q1, a second switch tube Q2, and a first operating voltage input terminal;
a first end of the first resistor R1 is connected to the load power supply terminal OUT, a second end of the first resistor R1 is connected to an anode of the first diode D1, a cathode of the first diode D1 is connected to a cathode of the first zener diode D2, an anode of the first zener diode D2, a controlled end of the first switch tube Q1, a controlled end of the second switch tube Q2, and a cathode of the second zener diode D3 are interconnected, an anode of the second zener diode D3 is connected to a cathode of the third zener diode D4, an anode of the third zener diode D4 and an output end of the second switch tube Q2 are all grounded, an input end of the first switch tube Q1 is connected to the first operating voltage input terminal, an output end of the first switch tube Q1 is connected to an input end of the second switch tube Q2, and a connection node is a signal terminal of the load detection circuit 60.
When the load 200 is connected to the circuit of the battery pack 10, the first switch Q1 is turned on, the control circuit 30 detects that the signal end of the load detection circuit 60 generates a rising edge trigger signal, determines that the load 200 is currently connected, and determines whether the operating parameter of the battery pack 10 is within a preset operating threshold at the same time, i.e., determines whether the battery pack 10 has a fault, if no fault exists, the discharge switch 20 is closed to connect the circuit, otherwise, the discharge switch 20 is not closed, wherein the first switch and the second switch may be a triode, a field effect transistor, or the like.
As shown in fig. 2 and fig. 5, in an embodiment, the intelligent battery pack 100 further includes a charging interface 80, a charging switch 70 and a charging detection circuit 90, the charging interface 80 is connected to the power supply terminal of the battery pack 10 through the charging switch 70, the detection terminal of the charging detection circuit 90 is connected to the charging interface 80, and the signal terminal of the charging detection circuit 90 is connected to the control circuit 30;
the charging detection circuit 90 is configured to output a third trigger signal to the control circuit 30 when the charging interface 80 is connected to the charger;
the control circuit 30 is further configured to obtain a sampling signal output by the sampling circuit 50 when receiving the third trigger signal, compare the sampling signal with a corresponding preset working threshold, and control the charging switch 70 to be turned on when the sampling signal is within the preset working threshold.
In this embodiment, the charging interface 80 may be a charging connector, after the charger is connected to the charging interface 80 and the control circuit 30 receives the third trigger signal, in order to improve the charging safety, the control circuit 30 also obtains a sampling signal of the battery pack 10 at the same time, so as to determine whether the working parameter of the battery pack 10 is within the preset working threshold, and after the working parameter of the battery pack 10 is within the preset working threshold, the charging switch 70 is controlled to be turned on, so as to charge the battery pack 10.
The charging switch 70 at least includes a controlled switch, i.e., corresponding to turn on and off according to a control signal, the controlled switch may be a relay, a field effect transistor, a triode, an IGBT, or the like, and is not limited specifically herein, and a charging protection circuit may be further disposed between the charging interface 80 and the battery pack 10, and the charging protection circuit performs a self-shutdown or a self-locking protection when the charging current and the charging voltage are too large.
In a specific embodiment, the charge detection circuit 90 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first capacitor C1, a second capacitor C2, an optical coupler IC1, and a first operating voltage input terminal;
the first end of the first capacitor C1, the positive electrode of the optical coupler IC1 and the charging interface 80 are interconnected, the second end of the first capacitor C1, the first end of the second resistor R2 and the negative electrode of the optical coupler IC1 are interconnected, the second end of the second resistor R2 is grounded, the collector of the optical coupler IC1 is connected with the first working voltage input end, the emitter of the optical coupler IC1, the first end of the third resistor R3 and the first end of the fourth resistor R4 are interconnected, the second end of the third resistor R3 and the first end of the second capacitor C2 are connected, the connection node is a signal end of the charging detection circuit 90, and the second end of the fourth resistor R4 and the second end of the second capacitor C2 are both grounded.
When the charger is connected to the circuit of the battery pack 10, a photocurrent is generated by the optocoupler IC1 to flow OUT, a rising edge signal trigger signal is generated at the signal terminal OUT2 of the charge detection circuit 90, and the control circuit 30 detects that the trigger signal is combined with the state of the battery pack 10 at the moment to judge whether the battery pack 10 has a fault, and if the battery pack has no fault, the charge switch 70 is closed, otherwise, the charge switch 70 is not closed.
Further, with reference to fig. 3, the sampling circuit 50 further includes a voltage equalizing circuit, the voltage equalizing circuit is connected between the power terminals of two adjacent single batteries, and the controlled terminal of the voltage equalizing circuit is connected to the control circuit 30;
the control circuit 30 is used for outputting a control signal to the voltage equalizing circuit when the voltage difference between two adjacent single batteries is greater than a preset voltage;
and the voltage balancing circuit is used for starting when receiving the control signal and carrying out voltage balancing processing on the voltages of the two adjacent single batteries.
In this embodiment, because the difference between the batteries, when the battery pack 10 is charging, there is a difference in voltage between the batteries, therefore, when the voltage of the battery cells is detected, voltage equalization is performed by the control voltage equalizing circuit, when the voltage difference between two adjacent battery cells is greater than the preset voltage, the control circuit 30 controls the equalizing switch in the voltage equalizing circuit to be turned on, the two adjacent battery cells are communicated to perform voltage equalization, the difference between the battery cells is reduced or eliminated, the service life of the battery is prolonged, and the reliability of the battery is increased.
As shown in fig. 6, in an embodiment, the control circuit 30 includes a battery management chip 31 and a microprocessor 32, a signal terminal of the battery management chip 31 is respectively connected to a signal terminal of the sampling circuit 50, a controlled terminal of the charging switch 70, a controlled terminal of the discharging switch 20, a controlled terminal of the voltage balancing circuit, and a signal terminal of the microprocessor 32, and the microprocessor 32 is further connected to the charging detection circuit 90 and the load detection circuit 60;
the battery management chip 31 is used for acquiring the sampling signal of the sampling circuit 50, sending the sampling signal to the microprocessor 32, and correspondingly controlling the charging switch 70, the discharging switch 20 and the voltage equalization circuit to work according to the control signal of the microprocessor 32;
and the microprocessor 32 is configured to obtain the first trigger signal, the second trigger signal, the third trigger signal and the sampling signal, compare the sampling signal with a corresponding preset working threshold, and correspondingly output a control signal to the battery management chip 31.
In this embodiment, the battery management chip 31 is configured to obtain a sampling signal, and feed back the sampling signal to the microprocessor 32, and meanwhile, the microprocessor 32 further receives signals detected by the load detection circuit 60, the fingerprint acquirer 40, and the charge detection circuit 90, and the microprocessor 32 performs processing calculation and correspondingly outputs a control signal to the battery management chip 31, and the battery management chip 31 correspondingly controls the charging switch 70 and the discharging switch 20 to be turned on and off according to the control signal, so as to complete control and management of the intelligent battery pack 100, and the types of the microprocessor 32 and the battery management chip 31 are not specifically limited, and can be selected according to requirements.
The utility model discloses still provide an electric automobile, this electric automobile include intelligent battery group 100, and this intelligent battery group 100's concrete structure refers to above-mentioned embodiment, because this electric automobile has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is not repeated here one by one.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. An intelligent battery pack is used for an electric automobile and is characterized by comprising a battery pack, a discharge switch, a control circuit and a fingerprint collector;
the battery pack, the discharge switch and the load are sequentially connected, the controlled end of the discharge switch is connected with the control end of the control circuit, and the signal end of the fingerprint collector is connected with the control end of the control circuit;
the fingerprint collector is used for collecting user fingerprint information and outputting a first trigger signal to the control circuit when the user fingerprint information is matched with prestored fingerprint information;
and the control circuit outputs a switch control signal to the discharge switch when receiving the first trigger signal so as to control the conduction of the discharge switch, so that the battery pack provides a working power supply for the load.
2. The intelligent battery pack according to claim 1, further comprising a sampling circuit, a signal terminal of the sampling circuit being connected to a signal terminal of the control circuit;
the sampling circuit is used for sampling the working parameters of the battery pack and outputting sampling signals to the control circuit;
the control circuit is further used for comparing the sampling signal with a preset working threshold value, and controlling the discharge switch to be switched on according to the first trigger signal when the sampling signal is within the preset working threshold value.
3. The intelligent battery pack according to claim 2, wherein the battery pack comprises a plurality of single batteries connected in series and parallel, the sampling circuit comprises a current sampling circuit, a voltage sampling circuit and a temperature sampling circuit, and signal ends of the current sampling circuit, the voltage sampling circuit and the temperature sampling circuit are respectively connected with a signal end of the control circuit;
the current sampling circuit is used for sampling the charging or discharging current of the battery pack and outputting a current sampling signal to the control circuit;
each voltage sampling circuit is used for sampling the working voltage of each single battery and respectively outputting a plurality of voltage sampling signals to the control circuit;
each temperature sampling circuit is used for sampling the temperature and/or the ambient temperature of each single battery and outputting a temperature sampling signal to the control circuit.
4. The intelligent battery pack according to claim 3, further comprising a load detection circuit and a load power supply terminal, wherein the load is connected to the discharge switch via the load power supply terminal, a detection terminal of the load detection circuit is connected to the load power supply terminal, and a signal terminal of the load detection circuit is connected to a signal terminal of the control circuit;
the load detection circuit is used for detecting whether a load is connected with a load power supply end or not and outputting a second trigger signal to the control circuit when the load is connected with the load power supply end;
the control circuit is further used for acquiring a sampling signal output by the sampling circuit when the second trigger signal is received, comparing the sampling signal with a corresponding preset working threshold value, and controlling the discharge switch to be switched on after the sampling signal is within the preset working threshold value and the first trigger signal is acquired.
5. The intelligent battery pack according to claim 4, wherein the load detection circuit comprises a first resistor, a first diode, a first zener diode, a second zener diode, a third zener diode, a first switch tube, a second switch tube, and a first operating voltage input terminal;
the first end of the first resistor is connected with the power supply end of the load, the second end of the first resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the cathode of the first voltage-stabilizing diode, the anode of the first voltage-stabilizing diode, the controlled end of the first switch tube, the controlled end of the second switch tube and the cathode of the second voltage-stabilizing diode are interconnected, the anode of the second voltage-stabilizing diode is connected with the cathode of the third voltage-stabilizing diode, the anode of the third voltage-stabilizing diode and the output end of the second switch tube are all grounded, the input end of the first switch tube is connected with the first working voltage input end, the output end of the first switch tube is connected with the input end of the second switch tube, and the connection node is the signal end of the load detection circuit.
6. The intelligent battery pack according to claim 5, further comprising a charging interface, a charging switch and a charging detection circuit, wherein the charging interface is connected to a power supply terminal of the battery pack via the charging switch, a detection terminal of the charging detection circuit is connected to the charging interface, and a signal terminal of the charging detection circuit is connected to the control circuit;
the charging detection circuit is used for outputting a third trigger signal to the control circuit when the charging interface is connected with a charger;
the control circuit is further used for obtaining a sampling signal output by the sampling circuit after receiving the third trigger signal, comparing the sampling signal with a corresponding preset working threshold value, and controlling the charging switch to be switched on when the sampling signal is in the preset working threshold value.
7. The intelligent battery pack according to claim 6, wherein the charge detection circuit comprises a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, an optocoupler, and a first operating voltage input;
the first end of first electric capacity the positive pole of opto-coupler is connected and the interface that charges interconnects, the second end of first electric capacity the first end of second resistance reaches the negative pole of opto-coupler interconnects, the second end ground connection of second resistance, the collecting electrode of opto-coupler with first operating voltage input is connected, the projecting pole of opto-coupler the first end of third resistance reaches the first end of fourth resistance interconnects, the second end of third resistance with the first end of second electric capacity is connected and the connected node does charge detection circuitry's signal end, the second end of fourth resistance with the second of second electric capacity is held all ground connection.
8. The intelligent battery pack according to claim 7, wherein the sampling circuit further comprises a voltage equalization circuit connected between power supply terminals of two adjacent unit batteries, and a controlled terminal of the voltage equalization circuit is connected with the control circuit;
the control circuit is used for outputting a control signal to the voltage balancing circuit when the voltage difference between two adjacent single batteries is greater than a preset voltage;
and the voltage balancing circuit is used for starting when receiving the control signal and carrying out voltage balancing processing on the voltages of the two adjacent single batteries.
9. The intelligent battery pack according to claim 8, wherein the control circuit comprises a battery management chip and a microprocessor, a signal terminal of the battery management chip is respectively connected with a signal terminal of the sampling circuit, a controlled terminal of the charging switch, a controlled terminal of the discharging switch, a controlled terminal of the voltage equalizing circuit and a signal terminal of the microprocessor, and the microprocessor is further connected with the charging detection circuit and the load detection circuit;
the battery management chip is used for acquiring a sampling signal of a sampling circuit, sending the sampling signal to the microprocessor, and correspondingly controlling the charging switch, the discharging switch and the voltage equalization circuit to work according to a control signal of the microprocessor;
the microprocessor is used for acquiring the first trigger signal, the second trigger signal, the third trigger signal and the sampling signal, comparing the sampling signal with a corresponding preset working threshold value, and correspondingly outputting a control signal to the battery management chip.
10. An electric vehicle characterized by comprising the intelligent battery pack according to any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112339613A (en) * | 2020-10-16 | 2021-02-09 | 格力博(江苏)股份有限公司 | Battery pack management device and management method and electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112339613A (en) * | 2020-10-16 | 2021-02-09 | 格力博(江苏)股份有限公司 | Battery pack management device and management method and electric vehicle |
| CN112339613B (en) * | 2020-10-16 | 2022-03-22 | 格力博(江苏)股份有限公司 | Battery pack management device and management method and electric vehicle |
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