CN111509813A - Safe charging device and system for battery of electric vehicle - Google Patents
Safe charging device and system for battery of electric vehicle Download PDFInfo
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- CN111509813A CN111509813A CN202010477183.1A CN202010477183A CN111509813A CN 111509813 A CN111509813 A CN 111509813A CN 202010477183 A CN202010477183 A CN 202010477183A CN 111509813 A CN111509813 A CN 111509813A
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- 238000001914 filtration Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 230000001629 suppression Effects 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 3
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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- 238000009529 body temperature measurement Methods 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
- H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00309—Overheat or overtemperature protection
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Abstract
The application discloses safe charging device of electric vehicle's battery, including the input with the power is connected, the charging circuit that the output is connected with the battery, a temperature sensor for setting up in battery department and gathering the temperature value of battery when charging circuit charges the battery is connected with temperature sensor, a MCU for acquireing the temperature value, and confirm the charged state of battery through the big or small relation of comparison temperature value and temperature threshold, because when the battery is charged safely, the temperature of battery is lower, when dangerous appears in charging, the temperature of battery is higher, temperature sensor gathers the temperature value of battery when the battery charges, MCU acquires this temperature value, and confirm the current charged state of this battery through the big or small relation of comparison this temperature value and temperature threshold. By adopting the technical scheme, the temperature of the battery can be monitored, the charging state of the battery can be determined according to the temperature of the battery, the charging safety of the battery is greatly enhanced, and the accident rate is reduced.
Description
Technical Field
The present disclosure relates to the field of electric vehicles, and more particularly, to a safety charging device and system for an electric vehicle.
Background
With the rapid development of new energy technology, under the condition that the current traffic is gradually blocked, the electric bicycle and the electric motorcycle become transportation tools for a large number of people to go out due to the convenience of the electric bicycle and the electric motorcycle, but the electric bicycle and the electric motorcycle in various big cities in China are charged disorderly, the electric bicycle and the electric motorcycle are charged by private pull wires, indoor charging, charging in corridors and the like, and the safety accidents caused by the charging of the electric bicycle every year frequently occur, so that the casualties and the economic loss are caused.
In the charging process of the existing charger, the input end of a charging circuit is connected with a power supply, the output end of the charging circuit is connected with a battery, so that the battery is charged, after the voltage of the battery reaches a preset value, the charging is finished, and the MCU controls the charger to stop charging. Because the temperature of the battery is not monitored in the charging process, if faults occur in the charging process, the temperature of the battery rises continuously, the battery cannot be processed in time, and safety accidents are likely to be caused.
Therefore, it is quite dangerous to monitor the temperature during the charging process of the battery, and safety accidents are easily caused once the temperature of the battery is too high, so that the temperature of the battery needs to be monitored during the charging process of the battery.
Disclosure of Invention
The purpose of the application is to provide a safe charging device and a system of an electric vehicle, which are used for enhancing the safety of a battery charging process and reducing the possibility of safety accidents caused by overhigh temperature of the battery.
In order to solve the above technical problems, the present application provides a safe charging device for a battery of an electric vehicle, including a charging circuit, an input terminal of the charging circuit being connected to a power supply, an output terminal of the charging circuit being connected to the battery;
the temperature sensor is used for collecting the temperature value of the battery when the charging circuit charges the battery;
and the MCU is connected with the temperature sensor and used for acquiring a temperature value and determining the charging state of the battery by comparing the size relationship between the temperature value and the temperature threshold value.
Preferably, the charging circuit further comprises a switch, a control end of the switch is connected with the MCU, and an action end of the switch is disposed in a loop formed by the output end of the charging circuit and the battery to realize the connection or disconnection of the loop according to a control signal of the MCU.
Preferably, the MCU further includes a first bus interface connected with a bus interface of the BMS system of the battery through a bus.
Preferably, the MCU further includes a second bus interface, and the second bus interface is connected to the bus interface of the main control device through a bus.
Preferably, the device further comprises a communication module, and the communication module is connected with the MCU.
Preferably, the charging device further comprises a charging indication circuit, and the charging indication circuit is connected with the MCU.
Preferably, the switch is embodied as a switch tube or a relay.
Preferably, the temperature sensor is arranged at a plug of which the output end is connected with the battery, so as to acquire a temperature value of the battery when the plug is matched with a socket of the battery.
Preferably, the temperature sensor is an NTC temperature sensor.
In order to solve the above technical problem, the present application further provides a system for safely charging a battery of an electric vehicle, including a main control device and the above safety charging device for a battery of an electric vehicle.
The application provides a safe charging device of electric vehicle's battery, including charging circuit, still include temperature sensor and MCU, because temperature sensor is used for setting up in battery department, consequently can realize gathering the temperature value of battery when charging circuit charges the battery, when the temperature of battery is higher, the MCU of being connected with temperature sensor can acquire the temperature value of battery to just can confirm the current charged state of this battery through the big or small relation of comparing this temperature value and the temperature threshold value of prerecording. By adopting the technical scheme, the current temperature of the battery can be monitored in the charging process, the charging state of the battery can be determined according to the current temperature of the battery, the charging safety of the battery is greatly enhanced, and the accident rate is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a structural diagram of a safety charging device for a battery of an electric vehicle according to an embodiment of the present application;
fig. 2 is a block diagram of a safety charging device for a battery of an electric vehicle according to an embodiment of the present application;
fig. 3 is a block diagram of a safety charging device for a battery of an electric vehicle according to an embodiment of the present application;
fig. 4 is a structural diagram of a safety charging system for a battery of an electric vehicle according to an embodiment of the present application;
wherein, 1 is charging circuit, 2 is MCU, 3 is temperature sensor, 4 is the switch, 5 is first bus interface, 6 is the second bus interface, 7 is master control equipment, 8 is communication module.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a safe charging device and a system of an electric vehicle.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
It should be noted that, the batteries of the electric vehicle mentioned in this application include, but are not limited to, lithium batteries, and other batteries such as lead-acid batteries, nickel-metal hydride batteries, etc. can also be used as the batteries of the electric vehicle, and the batteries include single-cell batteries, and also include battery packs composed of multiple cells connected in series or in parallel, which will be collectively referred to as batteries hereinafter, and the batteries can be applied to various electric vehicles including electric bicycles, electric motorcycles, electric tricycles, etc. to provide electric power to the electric vehicle.
Fig. 1 is a structural diagram of a safety charging device for a battery of an electric vehicle according to an embodiment of the present disclosure, as shown in fig. 1, the device includes a charging circuit 1, an MCU2, and a temperature sensor 3, an input end of the charging circuit 1 is configured to be connected to a power supply, an output end of the charging circuit 1 is configured to be connected to the battery, the temperature sensor 3 is configured to be disposed at the battery, and the MCU2 is connected to the temperature sensor 3.
In the implementation, the input end of the charging circuit 1 is connected with a power supply, the charging circuit 1 performs interference suppression, rectification, filtering and voltage reduction on the input electric signal, such as 220V alternating current, to form a power supply suitable for a battery, and the output end of the charging circuit is connected with the battery to charge the battery. The temperature sensor 3 is used for collecting the temperature value of the battery when the battery is charged, and transmitting the temperature value to the MCU2, after the temperature value is obtained, the MCU2 determines the charging state of the battery at the moment by comparing the size relationship between the temperature value and the temperature threshold value.
It should be noted that, in this embodiment, the modification process of the charging circuit 1 on the input electrical signal is not specifically limited, and may include interference suppression, rectification, filtering, and voltage reduction, or may not include or include other processes, and the corresponding specific circuit structure of the charging circuit 1 is not specifically limited, for example, the corresponding circuit for implementing interference suppression, rectification, filtering, and voltage reduction is not limited in structure, and the process may be implemented, and whether the circuit structure corresponding to other processes is included is also not limited. It should be noted that, in fig. 1, the input end of the charging circuit 1 is connected to a 220V ac power supply, while in other embodiments, the input end of the charging circuit 1 may be connected to other power supplies, and meanwhile, since the power supply connected to the input end of the charging circuit 1 changes, corresponding internal structures or parameters of some elements need to be changed accordingly, and finally, the power supply is changed into a power supply suitable for charging a battery. When the output end of the charging circuit 1 is connected to the battery, the plug and the socket may be used for connection, the plug is inserted into the socket, the output end of the charging circuit 1 is successfully connected to the battery, and the battery is charged.
It should be noted that the present embodiment does not limit the type of the temperature sensor 3, as long as the temperature measurement range includes the temperature variation range during battery charging, the temperature sensor 3 can be selected according to the actual situation, the precision requirement of the temperature sensor 3 and the cost, as a preferred embodiment, the temperature sensor 3 is an NTC temperature sensor 3, the NTC temperature sensor 3 is composed of an NTC thermistor and a probe, the resistance value of the NTC thermistor rapidly decreases along with the temperature rise, which generally consist of 2 or 3 metal oxides, are mixed in a fluid-like clay and calcined in a high temperature furnace to a dense sintered ceramic, the battery temperature value is suitable for the embodiment to collect the battery temperature value because the actual size is flexible, as small as 0.01 inch, and the maximum size is almost unlimited, and is generally less than half an inch.
When the temperature sensor 3 is arranged, the arrangement position of the temperature sensor is not limited, the temperature sensor 3 can be independently arranged and is connected with the MCU2 through a transmission line, the position of the temperature sensor 3 only needs to acquire the temperature value of the battery, for example, the temperature sensor 3 is arranged on a patch, and the patch is attached to the surface of the battery to acquire the temperature of the battery when the battery is charged. As a preferred embodiment, the temperature sensor 3 is arranged at the plug where the output end of the charging circuit 1 is connected with the battery, and is integrated with the plug, when the plug is inserted into the socket of the battery, the temperature sensor 3 can acquire the temperature of the battery, in the actual charging process, when the plug is inserted into the socket, the position of the temperature sensor 3 is also set, the temperature sensor 3 is not required to be operated independently to be in a proper position, so that the operation of a user is simpler during charging, the problem of device failure caused by forgetting to operate independently to enable the temperature sensor 3 to be in the proper position due to forgetting is also prevented, and the experience of the user is enhanced.
It should be noted that, in this embodiment, the temperature sensor 3 is controlled by the MCU2 to acquire the temperature value of the battery only when detecting that the output terminal of the charging circuit 1 is connected to the battery, and when the output terminal is not connected to the battery, the temperature sensor 3 does not operate and does not acquire the temperature value, thereby reducing power consumption and saving energy.
In specific implementation, when the charging state of the battery is a safe state, the temperature of the battery is low, and when the charging state of the battery is a dangerous state, overcharge or other faults occur in the charging process of the battery, and the temperature of the battery is high, so that a temperature threshold value can be obtained through a large number of experiments, and whether the current charging state of the battery is safe can be judged by comparing the temperature value acquired by the temperature sensor 3 with the temperature threshold value, specifically, when the temperature value acquired by the temperature sensor 3 is smaller than the temperature threshold value, the charging state of the battery is determined to be the safe state, and otherwise, the charging state of the battery is determined to be the dangerous state.
The application provides a safe charging device of electric vehicle's battery, including charging circuit, still include temperature sensor and MCU, because temperature sensor is used for setting up in battery department, consequently can realize gathering the temperature value of battery when charging circuit charges the battery, when the temperature of battery is higher, the MCU of being connected with temperature sensor can acquire the temperature value of battery to just can confirm the current charged state of this battery through the big or small relation of comparing this temperature value and the temperature threshold value of prerecording. By adopting the technical scheme, the current temperature of the battery can be monitored in the charging process, the charging state of the battery can be determined according to the current temperature of the battery, the charging safety of the battery is greatly enhanced, and the accident rate is reduced.
On the basis of the above embodiments, the safety charging device for an electric vehicle in this embodiment further includes a switch 4, as shown in fig. 2, a control terminal of the switch 4 is connected to the MCU2, and an operation terminal is disposed in a loop formed by the output terminal of the charging circuit 1 and the battery, and the loop is turned on or off according to a control signal of the MCU 2.
In the specific implementation, the input end of the charging circuit 1 is connected with a power supply, the charging circuit 1 performs interference suppression, rectification, filtering and voltage reduction on the power supply to form a power supply suitable for a battery, and the output end of the charging circuit is connected with the battery. The temperature sensor 3 is used for collecting the temperature value of the battery when the battery is charged, and transmitting the temperature value to the MCU2, after the temperature value is obtained, the MCU2 determines the charging state of the battery at the moment by comparing the size relationship between the temperature value and the temperature threshold value. When the charging state of the battery is a safe state, the MCU2 sends a control signal to the control end of the switch 4, the action end of the control switch 4 realizes that the output end of the charging circuit 1 is connected with a loop formed by the battery, the battery is normally charged, when the charging state of the battery is a dangerous state, the MCU2 sends a control signal to the control end of the switch 4, the action end of the control switch 4 realizes that the output end of the charging circuit 1 is disconnected with the loop formed by the battery, and the battery stops charging.
It should be noted that, in this embodiment, the type of the switch 4 is not limited, and may be a MOS transistor, a relay, or the like, as long as the control signal sent by the MCU2 and received through the control terminal can be realized, and the action terminal of the switch 4 is controlled to realize the closing and conducting of the switch 4. As a preferred embodiment, the switch 4 is a relay, a control terminal (coil of the relay) of the relay is connected to the MCU2, and receives a control signal of the MCU2, an operation terminal of the relay is disposed in a circuit at the output terminal of the charging circuit 1, and after the control terminal receives the control signal of the MCU2, the operation terminal (relay contact) operates to connect and disconnect a circuit formed by the output terminal of the charging circuit 1 and the battery, thereby automatically realizing normal charging and stopping charging of the battery. It should be noted here that there is no requirement for the specific model of the relay, as long as the control terminal can recognize the MCU2 signal and control the output terminal according to the signal, the output terminal can bear the current and the self voltage division when the charging circuit 1 is charging, and the specific model of the relay can be selected according to the actual situation. Also in other embodiments, when the switch 4 is a MOS transistor, there is no specific requirement for the type of MOS transistor, such as an N-channel MOS transistor and a P-channel MOS transistor, and the gate of the MOS transistor is used as the control terminal, and the source and the drain are used as the action terminals, wherein the source and the drain are respectively connected to the charging circuit and the battery.
Fig. 3 is a structural diagram of another safety charging device for a battery of an electric vehicle according to an embodiment of the present application, and as shown in fig. 3, the MCU2 of the present embodiment further includes a first bus interface 5, and the first bus interface 5 is connected to a bus interface of a BMS system of the battery through a bus.
It should be noted that the present embodiment is directed to a battery with a BMS system, and the battery is hereinafter referred to as a BMS system. In the specific implementation process, the input end of the charging circuit 1 is connected with a power supply, the charging circuit 1 performs interference suppression, rectification, filtering and voltage reduction on the power supply to form a power supply suitable for a battery, the output end of the charging circuit is connected with the battery, a bus interface of the MCU2 is connected with a bus interface of a BMS system of the battery through a bus, the MCU2 compares a temperature value acquired by the temperature sensor 3 with a temperature threshold value to judge whether the current charging state of the battery is safe or not, the charging circuit is in butt joint with the BMS system of the battery under the safe condition, after the butt joint of the charging protocol is completed, the MCU2 sends a control signal to a control end of the switch 4, the control switch 4 is closed, the output end of the charging circuit 1 is conducted with a loop formed by the battery, and the. After the MCU2 finishes the butt joint of the charging protocol with the BMS system of the battery, the MCU2 receives the parameter values such as the charging current and the charging voltage of the battery collected in the BMS system, the charging state of the battery is determined by comparing the relation between each parameter value and each parameter threshold value, meanwhile, the MCU2 also determines the charging state of the battery by comparing the relation between the temperature value collected by the temperature sensor 3 and the temperature threshold value, when one of the parameter values determines that the charging state of the battery is dangerous, the MCU2 sends a control signal to the control end of the switch 4 to control the switch 4 to be switched off, the output end of the charging circuit 1 is switched off from a loop formed by the battery, and the charging of the battery is stopped.
It should be noted that, after the MCU2 completes the docking of the charging protocol with the BMS system of the battery, the parameter values of the battery collected by the MCU2 in the BMS system for comparing the parameter values with the parameter thresholds to determine the charging state of the battery are not particularly limited, and may be the charging current and/or the charging voltage, or other parameters.
Further, the type of the first bus is a CAN bus, an L IN bus, or an RS485 bus, which CAN be selected according to a bus interface of the BMS system of the battery.
On the basis of the above embodiments, as shown in fig. 3, the MCU2 in this embodiment further includes a second bus interface 6, and the second bus interface 6 is connected to the master control device 7 through a bus.
In the specific implementation, the input end of the charging circuit 1 is connected with a power supply, the charging circuit 1 performs interference suppression, rectification, filtering and voltage reduction on the power supply to form a power supply suitable for a battery, the output end is connected with the battery, the first bus interface 5 of the MCU2 is connected with a bus interface of a battery BMS system of the battery through a bus, the second bus interface 6 of the MCU2 is connected with a main control device 7 through a bus, the MCU2 transmits a temperature value acquired by the temperature sensor 3 to the main control device 7, the main control device 7 judges whether the current charging state of the battery is safe by comparing the temperature value with a temperature threshold, the MCU2 performs charging protocol docking with the battery BMS system of the battery under the safe condition, after the charging protocol docking is completed, the main control device 7 sends a signal to the MCU2, the MCU2 sends a control signal to the control end of the switch 4 after receiving the signal, the control switch 4 is closed, and the output end of the charging circuit 1, and normal charging of the battery is realized. After the MCU2 finishes the butt joint of the charging protocol with the BMS system of the battery, the MCU2 receives the parameters such as the charging current and the charging voltage of the battery collected in the BMS system, and transmits the parameters to the main control device 7, the main control device 7 determines the charging state of the battery by comparing the relation between the parameters and the threshold values of the parameters, and also determines the charging state of the battery by comparing the relation between the temperature value collected by the temperature sensor 3 and the threshold value of the temperature, when one of the parameters determines that the charging state of the battery is dangerous, the main control device 7 sends a signal to the MCU2, the MCU2 sends a control signal, the control switch 4 is switched off, the output end of the charging circuit 1 is switched off from the circuit formed by the battery, and the charging of the.
Further, the type of the second bus is CAN bus, L IN bus or RS485 bus, which CAN be selected according to the bus interface of the main control device 7.
On the basis of the above embodiments, as shown in fig. 3, the present embodiment further includes a communication module 8, and the communication module 8 is connected with the MCU 2.
In a specific implementation process, the MCU2 transmits data during the charging process, including the charging state, the battery temperature, the charging current, the charging voltage, etc., to the communication module 8 periodically at regular intervals, the communication module 8 transmits the data to the communication module of the monitoring center or the user terminal, and when the user or the monitoring center finds that the charging state is dangerous through the data received by the communication module, measures can be taken to handle the data, such as manually turning off the power supply, unplugging the charging plug, etc., to further enhance the safety of the charging process.
As a preferred embodiment, the communication module 8 is a wireless communication module, such as an NB-L OT communication module, a 2G communication module, a 3G communication module, or a 4G communication module, and the wireless communication module is more convenient and wider in application range than the wired communication module, so that the user can use the safety charging device to charge the battery without limiting the activity range, thereby enhancing the user experience.
On the basis of the above embodiments, the present embodiment further includes a charging indication circuit, and the charging indication circuit is connected to the MCU 2.
In a specific implementation, when the charging state of the battery is safe, the MCU2 controls elements in the charging indicating circuit to send out a signal indicating safety, and when the charging state of the battery is dangerous, the MCU2 controls indicating elements in the charging indicating circuit to send out a signal indicating danger.
In the above embodiments, the safety charging device for a battery of an electric vehicle is described in detail, and the present application also provides an embodiment of a safety charging system for a battery of an electric vehicle based on the above safety charging device for a battery of an electric vehicle.
As shown in fig. 4, the system comprises a master control device 7 and a safe charging device of the battery of the electric vehicle as described above. In a specific implementation, a plurality of safety charging devices are connected with the master control device 7 through a bus. The main control device 7 sets different addresses of each safety charging device, then acquires data in each charging device and sends control signals to each safety charging device to realize normal charging and stopping charging of each battery, thereby realizing data butt joint and centralized safety management when a plurality of batteries are charged.
It should be noted that, for the specific working process between the master control device 7 and the single safety charging device, the above embodiment is described.
The application provides a safe charging system of electric vehicle's battery, including master control equipment and as above the safe charging device of electric vehicle's battery, because temperature sensor is used for setting up in battery department, consequently can realize gathering the temperature value of battery when charging circuit charges the battery, when the temperature of battery is higher, MCU that is connected with temperature sensor can acquire the temperature value of battery to just can confirm the current charged state of this battery through comparing the big or small relation of this temperature value and temperature threshold value recorded in advance. By adopting the technical scheme, the current temperature of the battery can be monitored in the charging process, the charging state of the battery can be determined according to the current temperature of the battery, the charging safety of the battery is greatly enhanced, and the accident rate is reduced.
The safety charging device and system for electric vehicle provided by the present application are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A safe charging device for a battery of an electric vehicle is characterized by comprising a charging circuit, wherein the input end of the charging circuit is connected with a power supply, and the output end of the charging circuit is connected with the battery;
a temperature sensor for being disposed at the battery to acquire a temperature value of the battery when the charging circuit charges the battery;
and the MCU is connected with the temperature sensor and used for acquiring the temperature value and determining the charging state of the battery by comparing the relationship between the temperature value and the temperature threshold value.
2. The device of claim 1, further comprising a switch, wherein a control terminal of the switch is connected to the MCU, and an operation terminal of the switch is disposed in a loop formed by the output terminal of the charging circuit and the battery to turn on or off the loop according to a control signal of the MCU.
3. The device for safely charging a battery of an electric vehicle according to claim 2, characterized in that the MCU further comprises a first bus interface connected with a bus interface of a BMS system of the battery through a bus.
4. The device for safely charging a battery of an electric vehicle according to claim 3, wherein the MCU further comprises a second bus interface, and the second bus interface is connected with the bus interface of the master control device through a bus.
5. The device for safely charging a battery of an electric vehicle according to claim 4, further comprising a communication module connected to the MCU.
6. The device for safely charging a battery of an electric vehicle according to claim 5, further comprising a charge indication circuit connected to the MCU.
7. The device for safely charging a battery of an electric vehicle according to claim 2, characterized in that said switch is in particular a switch tube or a relay.
8. The device for safely charging a battery of an electric vehicle according to claim 1, wherein the temperature sensor is provided at a plug at which the output terminal is connected to the battery, so as to acquire a temperature value of the battery when the plug is mated with a socket of the battery.
9. The device for safely charging a battery of an electric vehicle according to claim 1, characterized in that the temperature sensor is an NTC temperature sensor.
10. A system for the safe charging of a battery of an electric vehicle, characterized in that it comprises a master control device and a safe charging device of a battery of an electric vehicle according to any one of claims 1 to 9.
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| CN202010477183.1A CN111509813A (en) | 2020-05-29 | 2020-05-29 | Safe charging device and system for battery of electric vehicle |
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| CN202010477183.1A CN111509813A (en) | 2020-05-29 | 2020-05-29 | Safe charging device and system for battery of electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112158096A (en) * | 2020-09-30 | 2021-01-01 | 安徽江淮汽车集团股份有限公司 | Charging control circuit, control box and charging wire |
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| CN113320433A (en) * | 2021-06-02 | 2021-08-31 | 天津云圣智能科技有限责任公司 | Unmanned aerial vehicle battery management system and management method |
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