TWM643147U - Systems for battery management of electronic vehicles - Google Patents

Abstract

A battery management system for an electric vehicle, which is suitable for connecting to a battery, and includes a microcontroller, a switch suitable for electrically connecting the battery and receiving an operation command to start or close the microcontroller, and a switch connected to the A DC converter between the switch and the microcontroller, and an automatic termination circuit electrically connected to the microcontroller and the switch. The automatic termination circuit includes a detector which receives the operation command and detects the operation state information of the microcontroller, and an execution module connected with the detector. The execution module obtains a time value according to the operation command and the operation status information, and when the time value is higher than a preset threshold value, or when the operation command and the operation status information detected by the detector When not matching, the switch is controlled to turn off the microcontroller.

Description

Battery Management System for Electric Vehicles

The present invention relates to a power consumption management system, in particular to a battery management system of an electric vehicle.

At present, electric vehicles have gradually become popular in the market, and benefited from the rapid development of battery technology, they can use battery devices with significantly increased power storage to achieve a considerable mileage, and can respond to various multimedia and remote control functions. power demand. However, when the existing electric vehicle is not running, although the user will operate the main power switch to turn off the power supply, in order to maintain the electric vehicle in a standby state that can be woken up at any time, it even senses the surroundings and initiates a contingency action depending on the condition. functions, or to provide users with the need to connect with portable smart devices for remote control at any time, etc., all require more or less battery power. Whether it is based on the standpoint of environmental protection or the consideration of using electricity as much as possible for longer-distance driving needs, how to reduce unnecessary energy consumption of batteries with limited power has become an important key to continuous R&D and improvement for practitioners in related fields one.

Therefore, the purpose of the present invention is to provide a battery management system for an electric vehicle that can save unnecessary energy consumption.

Therefore, the battery management system of the electric vehicle of the present invention is suitable for being connected to a battery, and includes a microcontroller, a switch suitable for being electrically connected to the battery and used for receiving an operation instruction of starting or shutting down the microcontroller , a DC converter connected between the switcher and the microcontroller, and an automatic termination circuit electrically connected to the microcontroller and the switcher.

The automatic termination circuit includes a detector suitable for receiving the operation command and detecting the operation status information of the microcontroller, and an execution module connected to the detector. The execution module is used to obtain a time value according to the operation command and the operation status information, and when the time value is higher than a preset threshold value; or when the operation command and the operation detected by the detector When the status information does not match, the switch is controlled to turn off the microcontroller.

The effect of the present invention is that the automatic termination circuit can judge whether the microcontroller has exceeded the preset threshold value represented by the detector after the user operates the switch and sends the operation command to the microcontroller. One of the microcontrollers has not been operated for a period of time, and the microcontroller is turned off when it is determined that the microcontroller is not operated, thereby reducing the power consumption of the battery. In addition, the automatic termination circuit can also directly shut down the microcontroller to reduce unnecessary energy consumption of the battery when the operation command does not match the operation status information, which means that the microcontroller is operating abnormally. , also to ensure the safe operation of the microcontroller.

Referring to Fig. 1, it is an embodiment of the battery management system of the new type electric vehicle. This embodiment is suitable for being connected to a battery 9, and includes a microcontroller 1, and one is suitable for being electrically connected to the battery 9 and used for receiving a A switch 2 for starting or closing the operation command of the microcontroller 1, a DC converter 3 connected between the switch 2 and the microcontroller 1, an electrical connection between the microcontroller 1 and the switch 2, and a protection circuit 5 suitable for being electrically connected to the battery 9 and the switch 2. Wherein, the microcontroller 1 is generally the main control processor for controlling various instructions of the electric vehicle, and the switch 2 is used to receive the operation instructions from the user control, and is specifically connected to a key A switch (Key Switch, not shown in the figure) is used to receive the operation of opening and closing from the key. It should be noted that although the switch 2 in this embodiment is described as being suitable for connecting the key changeover switch, it can also be used for a similar functional mechanism of the keyless chip induction operation commonly used in electric vehicles.

When the switch 2 receives the operation command from the front-end equipment, that is, from the user, in order to ensure the stability of the power introduced into the microcontroller 1, the power is converted through the DC converter 3 before being introduced into the The microcontroller 1 thereby ensures that the microcontroller 1 can operate normally. In addition, the protection circuit 5 also forms an additional protection mechanism for the electrical connection between the switch 2 and the battery 9 in the form of, for example, a fuse and a load control.

Referring to FIG. 1 and FIG. 2 at the same time, the automatic termination circuit 4 includes a detector 41 suitable for receiving the operation command and detecting the operating status information of the microcontroller 1, and a detector 41 connected to the detector 41. Execution module 42. Specifically, the detector 41 can detect the operation of the switch 2 from the front-end equipment, and use it as a judgment basis for the subsequent operation of the execution module 42 . Specifically, the execution module 42 is a SR (Set-Restart) flip-flop, which can further switch between the two modes of opening and closing in addition to the opening and closing operations of the switch 2, due to specific The trigger condition triggers the switchover.

Referring to FIG. 3 , the execution module 42 is used to obtain a time value according to the operation command and the operation status information, and control the switch 2 to turn off the microcontroller 1 when the time value is higher than a preset threshold value. Specifically, the preset threshold value can be set to 30 minutes, for example. When the detector 41 detects the operation command to be turned on, it means that the battery 9 has started to supply power. If the detector 41 detects that the microcontroller If the microcontroller 1 has passed the exemplified 30 minutes without any action, it means that the microcontroller 1 may be in a state of unnecessary power consumption due to a wrong operation in the previous stage, or simply being idle. At this time, the execution module 42 will be activated due to the triggering condition, and directly shut down the microcontroller 1 to prevent the battery 9 from continuing to supply power.

In addition to the aforementioned situations triggered by time conditions, the execution module 42 is also used to control the switch 2 to turn off the microcontroller when the operation command does not match the operating status information detected by the detector 41 1. That is, if the front end has executed the operation of shutting down the microcontroller 1, but the detector 41 detects that the microcontroller 1 continues to consume the power of the battery 9 to operate, it means that an abnormal state in operation has occurred . At this time, the execution module 42 will also trigger to directly shut down the microcontroller 1, in addition to avoiding the battery 9 from continuously consuming unnecessary power, and also avoiding malfunctions of various components under abnormal operation.

Specifically, compared with the configuration of the traditional battery management system, even in the sleep state, the traditional battery management system still consumes about 500 microamperes (μA). In contrast to this embodiment, the actual consumption current is only 30 microamperes when using this embodiment and performing measurements. That is to say, the current consumption of the present embodiment can preferably be reduced to less than 10% of that of the traditional battery management system, which indeed exerts a significant throttling effect.

In addition, it should be noted that after the execution module 42 of the automatic termination circuit 4 controls the switch 2 to turn off the microcontroller 1, the switch 2 needs to receive the operation instruction to turn off the microcontroller 1 once, and then The microcontroller 1 cannot be turned on until the operating instruction for turning on the microcontroller 1 is received once. That is to say, if the previous control of closing the microcontroller 1 came from the automatic termination circuit 4, the user must first re-input the operation command to close the switch 2, and then input the operation command to open again. Operation instruction, just can make this battery 9 continue to provide electric power again. In this way, in addition to improving the user experience by cooperating with the normal operating procedure of closing and opening, it also further ensures that the present embodiment can continue in the normal operation process.

In summary, the embodiment of the battery management system of the new electric vehicle can judge the operation of the microcontroller 1 through the detector 41 of the automatic termination circuit 4, and cooperate with the operation command to confirm whether a specific Conditions are used to directly shut down the microcontroller 1 when conditions such as excessive idle time or abnormal operation occur, thereby avoiding unnecessary power consumption of the battery 9 and ensuring safe operation of the microcontroller 1 . Therefore, can really reach the purpose of this novel.

But the above-mentioned ones are only embodiments of the present invention, and should not limit the scope of implementation of the present invention with this. All simple equivalent changes and modifications made according to the patent scope of the present application and the content of the patent specification are still within the scope of the present invention. Within the scope covered by this patent.

1: Microcontroller 2: switch 3: DC converter 4: Automatic termination circuit 41: Detector 42:Execution module 5: Protection circuit 9: battery

Other features and functions of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a block diagram illustrating one embodiment of the battery management system of the novel electric vehicle; Figure 2 is a circuit diagram illustrating an automatic termination circuit of this embodiment; and Fig. 3 is a schematic diagram illustrating the operation of the automatic termination circuit.

1: Microcontroller

2: switch

3: DC converter

4: Automatic termination circuit

41: Detector

42:Execution module

5: Protection circuit

9: battery

Claims (7)

A battery management system for an electric vehicle, suitable for being connected to a battery, and comprising: a microcontroller; a switch adapted to be electrically connected to the battery and used to receive an operating command to activate or deactivate the microcontroller; a DC converter connected between the switcher and the microcontroller; and An automatic termination circuit, electrically connected to the microcontroller and the switch, and including a detector suitable for receiving the operation command and detecting the operation status information of the microcontroller, and a detector connected to the detector The execution module of the tester is used to obtain a time value according to the operation command and the operation status information, and control the switch to turn off the microcontroller when the time value is higher than a preset threshold value. The battery management system of an electric vehicle as described in Claim 1, wherein the execution module of the automatic termination circuit is also used to control when the operation command does not match the operation state information detected by the detector The switch turns off the microcontroller. The battery management system of an electric vehicle as described in any one of claim 1 or 2, wherein, after the execution module of the automatic termination circuit controls the switch to turn off the microcontroller, the switch needs to first receive and turn off the microcontroller The microcontroller can be turned on only after receiving the operation instruction once for the microcontroller and receiving the operation instruction once for turning on the microcontroller. The battery management system of the electric vehicle according to claim 1 further includes a protection circuit adapted to be electrically connected to the battery and the switch. A battery management system for an electric vehicle, suitable for being connected to a battery, and comprising: a microcontroller; a switch adapted to be electrically connected to the battery and used to receive an operating command to activate or deactivate the microcontroller; a DC converter connected between the switcher and the microcontroller; and An automatic termination circuit, electrically connected to the microcontroller and the switch, and including a detector suitable for receiving the operation command and detecting the operation status information of the microcontroller, and a detector connected to the detector An execution module of the detector, the execution module is used for controlling the switch to turn off the microcontroller when the operation command does not match the operation status information detected by the detector. The battery management system for an electric vehicle as described in Claim 5, wherein after the execution module of the automatic termination circuit controls the switch to turn off the microcontroller, the switch needs to receive an operation to turn off the microcontroller first instruction, and the microcontroller can be turned on only after receiving the operation instruction to turn on the microcontroller once. The battery management system of the electric vehicle according to claim 5 further includes a protection circuit suitable for being electrically connected to the battery and the switch.

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