Slave control board power supply control circuit, battery management system and power battery system

Abstract

The utility model discloses a slave control board power supply control circuit, a battery management system and a power battery system. The slave control board power supply control circuit comprises a control module which is used for generating a control signal; the latch module is connected with the control module, and the latch module is used for storing the control signal and continuously generating a switching signal according to the stored control signal; the switch module is connected with a power supply voltage; the switch module is connected with the latch module; the switch module is configured to be connected with the slave control board; and the switch module is used for controlling the power-on or power-off of the slave control board according to the switch signal. Compared with the prior art, the embodiment of the utility model can control the starting and stopping of the battery monitor of the electric equipment when the electric equipment stops working, thereby being beneficial to enhancing the function richness and improving the user experience.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a slave control board power supply control circuit, a battery management system and a power battery system. Background Art

[0002] With more and more vehicles being electrified, it has become crucial to achieve the highest level of functional safety through high-precision battery monitoring. After the vehicle stops, the battery management system needs to monitor the state of the high-voltage battery. The battery management system monitors the high-voltage battery through the slave control board, and it is necessary to ensure that the slave control board is always powered on during the monitoring. The power supply of the slave control board depends on the small battery of the vehicle. When the vehicle is parked for a long time, the small battery cannot support the continuous monitoring of the high-voltage battery by the slave control board.

[0003] However, in the prior art, the user cannot control the power on or off of the slave control board when the vehicle is in the parked state, which also results in a low richness of product functions and a poor actual experience for the user. Summary of the Utility Model

[0004] The utility model provides a slave control board power supply control circuit, a battery management system and a power battery system to enhance the richness of functions and improve the user experience.

[0005] According to one aspect of the utility model, a slave control board power supply control circuit is provided, and the slave control board power supply control circuit includes:

[0006] A control module for generating a control signal;

[0007] A latching module connected to the control module, the latching module for storing the control signal and continuously generating a switching signal according to the stored control signal;

[0008] A switching module connected to the power supply voltage; the switching module is connected to the latching module; the switching module is configured to be connected to the slave control board; the switching module is used to control the power on or off of the slave control board according to the switching signal.

[0009] Optionally, the latching module includes a latch or a flip-flop.

[0010] Optionally, the switching module includes: a first switching tube, a second switching tube, a first resistor and a second resistor;

[0011] The control terminal of the first switching tube is connected to the latching module; the input terminal of the first switching tube is connected to the control terminal of the second switching tube; the output terminal of the first switching tube is grounded; the input terminal of the second switching tube is connected to the power supply voltage; the output terminal of the second switching tube is connected to the slave control board; the first resistor is connected between the control terminal and the output terminal of the first switching tube; the second resistor is connected between the control terminal and the input terminal of the second switching tube.

[0012] Optionally, the slave control board power supply control circuit further includes: a power supply module;

[0013] The control module, the latching module, and the switching module are all connected to the power supply module;

[0014] The power supply module is used to provide the power supply voltage.

[0015] Optionally, the control module includes a battery management controller.

[0016] According to another aspect of the present invention, there is also provided a battery management system, which includes: a master control board and at least one slave control board;

[0017] The master control board is provided with the slave control board power supply control circuit described in any one of the above embodiments; the switching module of the slave control board power supply control circuit is connected to the slave control board.

[0018] Optionally, the slave control board includes: a slave board substrate and an acquisition control module;

[0019] The acquisition control module is disposed on the slave board substrate, and the acquisition control module is configured to be connected to the battery pack; the acquisition control module is used to acquire the operation data of the battery pack when the slave control board is powered on.

[0020] Optionally, the acquisition control module is connected to the control module, and the acquisition control module is further used to determine whether the operation data is abnormal, and generate a wake-up signal when the operation data is abnormal to wake up the control module.

[0021] Optionally, the acquisition control module includes a single cell battery management controller.

[0022] According to still another aspect of the present invention, there is also provided a power battery system, which includes a battery pack and the battery management system described in any one of the above embodiments.

[0023] In the embodiment of the present utility model, the control module generates a control signal according to the user's setting, and the latching module acquires the control signal and stores it. The latching module generates a switching signal according to the stored control signal to maintain the conducting state of the switching module. The switching module acquires the switching signal and controls the conduction or disconnection of the connection between the power supply voltage and the slave control board according to the switching signal, so as to realize the power-on or power-off control of the slave control board, and further realize the start-stop control of the battery monitoring of the electrical equipment. Compared with the prior art, the embodiment of the present utility model can control the start-stop of the battery monitoring of the electrical equipment in the state where the electrical equipment stops working, which is beneficial to enhancing the function richness and improving the user experience.

[0024] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present utility model, nor is it used to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of a slave control board power supply control circuit provided by Embodiment 1 of the present utility model;

[0027] Figure 2 is a schematic structural diagram of a slave control board power supply control circuit provided by Embodiment 4 of the present utility model;

[0028] Figure 3 is a schematic diagram of a switching module provided by Embodiment 3 of the present utility model;

[0029] Figure 4 is a schematic diagram of a battery management system provided by Embodiment 4 of the present utility model;

[0030] Figure 5 is a schematic diagram of a power battery system provided by Embodiment 5 of the present utility model. Detailed Embodiments

[0031] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] Figure 1 is a schematic structural diagram of a slave control board power supply control circuit provided in Embodiment 1 of the present utility model. The slave control board power supply control circuit provided in this embodiment can control the power on and off of the slave control board to achieve the start and stop control of the battery monitoring of the electrical equipment, improving the user experience. Refer to Figure 1 and the slave control board power supply control circuit includes: a control module 110, a latching module 120, and a switching module 130.

[0035] The control module 110 is used to generate a control signal; the latching module 120 is connected to the control module 110. The latching module 120 is used to store the control signal and continuously generate a switching signal according to the stored control signal; the switching module 130 is connected to the power supply voltage VCC; the switching module 130 is connected to the latching module 120; the switching module 130 is configured to be connected to the slave control board 20; the switching module 130 is used to control the power on or off of the slave control board 20 according to the switching signal. It can be understood that the slave control board 20 is connected to the battery of the electrical equipment, and the slave control board 20 is used to detect information such as the voltage, temperature, or current of the battery of the electrical equipment, that is, to monitor the battery of the electrical equipment. Among them, the operation of the slave control board 20 requires the support of electric energy. That is to say, the slave control board 20 can only monitor the battery of the electrical equipment when it is powered on. Therefore, by controlling the power on and off of the slave control board 20, the control of the battery monitoring of the electrical equipment can be achieved.

[0036] Specifically, the latch module 120 acquires the control signal generated by the control module 110 and stores the control signal. The control module 110 does not need to continuously generate the control signal. That is, after the latch module 120 acquires the control signal, the control module 110 does not need to maintain the powered-on state or the activated state. The switching signal generated by the latch module 120 is related not only to the control signal currently generated by the control module 110 but also to the control signal generated by the control module 110 at the previous moment. That is, when the control module 110 outputs a control signal at the current moment, the latch module 120 generates a switching signal according to the control signal generated by the control module 110 at the current moment; when the control module 110 does not output a control signal at the current moment, the latch module 120 generates a switching signal according to the stored control signal. Among them, the control signal stored by the latch module 120 is the control signal generated by the control module 110 at the previous moment.

[0037] The switch module 130 acquires the switching signal and controls the conduction or disconnection of the connection between the slave board 20 and the power supply voltage VCC according to the switching signal, that is, controls the power-on or power-off of the slave board 20. Exemplarily, the switching signal may include a power-on signal and a power-off signal. Among them, the generation of the power-on signal and the power-off signal is also related to the control signal generated by the control module 110. For example, when the control signal is a rising-edge signal, the latch module 120 generates a power-on signal; when the control signal is a falling-edge signal, the latch module 120 generates a power-off signal. The switch module 130 conducts when it acquires the power-on signal in the switching signal. At this time, the connection between the slave board 20 and the power supply voltage VCC is conducted, and the slave board 20 is powered on; the switch module 130 turns off when it acquires the power-off signal in the switching signal. At this time, the connection between the slave board 20 and the power supply voltage VCC is disconnected, and the slave board 20 is powered off. The user can control the control signal generated by the control module 110, thereby realizing the control of the power-on or power-off of the slave board 20, and further realizing the control of the start and stop of the battery monitoring of the electrical equipment.

[0038] The control module 110 of the embodiment of the present utility model generates a control signal according to the user's setting, and the latching module 120 acquires the control signal and stores it. The latching module 120 continuously generates a switching signal according to the stored control signal to maintain the conducting state of the switching module 130. The switching module 130 acquires the switching signal and controls the conduction or disconnection of the connection between the power supply voltage VCC and the slave control board 20 according to the switching signal, thereby realizing the control of the power-on or power-off of the slave control board 20, and further realizing the control of the start and stop of the battery monitoring of the electrical equipment. Compared with the prior art, the embodiment of the present utility model can control the start and stop of the battery monitoring of the electrical equipment in the state where the electrical equipment stops working. It can not only maintain the operation of the slave control board by controlling the power-on of the slave control board, but also control the power-off of the slave control board, reducing the energy consumption of the electrical equipment in the state where it stops working, which is beneficial to enhancing the function richness and improving the user experience.

[0039] Embodiment 2

[0040] Figure 2 FIG. is a schematic structural diagram of a power supply control circuit for a slave control board provided by Embodiment 2 of the present utility model. This embodiment is based on Embodiment 1. Optionally, referring to Figure 2 , the power supply control circuit for the slave control board further includes: a power supply module 140.

[0041] The control module 110, the latching module 120, and the switching module 130 are all connected to the power supply module 140; the power supply module 140 is used to provide the power supply voltage VCC.

[0042] Specifically, the power supply for the control module 110, the latching module 120, and the slave control board 20 is all provided by the power supply module 140. The voltages provided by the power supply module 140 for the control module 110, the latching module 120, and the slave control board 20 can be the same or different, and can be determined according to actual requirements in practical applications. This embodiment does not limit this.

[0043] Optionally, the control module 110 includes a battery management controller. Specifically, a battery management controller (BMC) is a control device for monitoring, managing, and protecting a battery system.

[0044] Optionally, the latching module 120 may include a latch or a flip-flop. Specifically, a latch is a level-triggered storage unit, and the data storage operation depends on the level value of the input clock (or enable) signal. Only when the latch is in the enabled state, the output signal of the latch will change with the change of the input signal. A flip-flop is a basic storage unit that can store one bit of binary data. It has two stable states, which can be used to represent 0 and 1. The state of the flip-flop will change according to the change of the input signal and the clock signal.

[0045] Optionally, in practical applications, the trigger can be a T flip-flop. Specifically, under the action of a clock pulse, the T flip-flop changes its output state according to the input flip signal. When the flip signal input is 1, each time a clock pulse arrives, the output state will flip once; when the flip signal input is 0, the output state remains unchanged. For example, assuming the initial output state is 0, if the flip signal input is 1, when the first clock pulse arrives, the output becomes 1; when the second clock pulse arrives, the output changes back to 0, and so on.

[0046] Embodiment III

[0047] Figure 3 is a schematic diagram of a switch module provided by Embodiment III of the present invention. This embodiment is based on Embodiment I and refers to Figure 3 Optionally, the switch module 130 includes: a first switching tube Q1, a second switching tube Q2, a first resistor R1, and a second resistor R2.

[0048] The control end of the first switching tube Q1 is connected to the latch module 120; the input end of the first switching tube Q1 is connected to the control end of the second switching tube Q2; the output end of the first switching tube Q1 is grounded; the input end of the second switching tube Q2 is connected to the power supply voltage VCC; the output end of the second switching tube Q2 is connected to the slave control board 20; the first resistor R1 is connected between the control end and the output end of the first switching tube Q1; the second resistor R2 is connected between the control end and the input end of the second switching tube Q2.

[0049] Optionally, continuing to refer to Figure 3 a first capacitor C1 can also be provided between the control end and the output end of the first switching tube Q1; a zener diode Z1 can also be provided between the control end and the input end of the second switching tube Q2; a third resistor R3 can also be provided between the control end of the first switching tube Q1 and the latch module 120 to limit the current output by the latch module 120; a fourth resistor R4 can also be provided between the first switching tube Q1 and the second switching tube Q2 to limit the current between the first switching tube Q1 and the second switching tube Q2; a fifth resistor R5 can also be provided between the second switching tube Q2 and the slave control board 20 to limit the current flowing into the slave control board 20.

[0050] Embodiment IV

[0051] Figure 4 is a schematic diagram of a battery management system provided by Embodiment IV of the present invention. The battery management system of this embodiment is provided with the slave control board power supply control circuit provided in any of the above embodiments. Refer to Figure 4, the battery management system includes: a main control board 10 and at least one slave control board 20.

[0052] The main control board 10 is provided with the slave control board power supply control circuit 100 provided in any of the above embodiments; the switch module 130 of the slave control board power supply control circuit 100 is connected to the slave control board 20. Optionally, the main control board 10 includes a main board substrate (not shown in the figure) and the slave control board power supply control circuit 100 provided in any of the above embodiments. The slave control board power supply control circuit 100 is disposed on the main board substrate. It should be noted that the battery management system provided by the embodiments of the present invention has the beneficial effects of the slave control board power supply control circuit provided in any of the above embodiments, which will not be elaborated here.

[0053] Optionally, continue to refer to Figure 4 , the slave control board 20 includes: a slave board substrate (not shown in the figure) and an acquisition control module 200.

[0054] The acquisition control module 200 is disposed on the slave board substrate, and the acquisition control module 200 is configured to be connected to the battery pack; the acquisition control module 200 is used to acquire the operation data of the battery pack when the slave control board 20 is powered on. Specifically, the power supply of the acquisition control module 200 is provided by the slave control board 20. When the slave control board 20 is powered on, the acquisition control module 200 is also powered on. Conversely, when the slave control board 20 is powered off, the acquisition control module 200 is also powered off. Among them, when the slave control board 20 is powered on, the acquisition control module 200 acquires the operation data of the battery pack to obtain the operation status of the battery pack and realize the monitoring of the battery pack.

[0055] It should be noted that in actual application, the operating states of the control module 110 of the main control board 10 include a working state and a sleep state. In the sleep state, the control module 110 does not acquire the acquisition data of the slave control board 20, and at this time, the operating power consumption of the control module 110 is relatively low.

[0056] Optionally, continue to refer to Figure 4, the acquisition control module 200 is connected to the control module 110. The acquisition control module 200 is further configured to determine whether the operation data is abnormal, and generate a wake-up signal when the operation data is abnormal to wake up the control module 110. Specifically, when the slave board 20 is powered on, the acquisition control module 200 acquires the operation data of the connected battery pack, and compares the acquired operation data with the threshold data stored in the acquisition control module 200 to determine whether the operation data of the battery pack is abnormal. The acquisition control module 200 generates a wake-up signal when the operation data is abnormal. The control module 110 obtains the wake-up signal and switches from the sleep state to the working state according to the wake-up signal. In this embodiment, the operation data acquired by the acquisition control module 200 of the slave board 20 is compared with the threshold data stored in the acquisition control module 200, and a wake-up signal is generated when the operation data is abnormal to wake up the control module 110, so as to perform a detailed diagnosis on the battery pack, which is beneficial to avoiding the expansion of battery pack failures and improving safety.

[0057] Optionally, the acquisition control module 200 includes a single-cell battery management controller. Specifically, the single-cell battery management controller (Cell Management Controller, CMC) is a device for monitoring and managing individual battery cells. Among them, the single-cell battery management controller acquires the operation data of the battery pack, compares the acquired operation data with the threshold data stored in the single-cell battery management controller, and generates a wake-up signal when the operation data is abnormal to wake up the control module 110.

[0058] Embodiment Five

[0059] Figure 5 is a schematic diagram of a power battery system provided by Embodiment Five of the present invention. The power battery system in this embodiment is provided with the battery management system provided in any of the above embodiments. Refer to Figure 5 , the power battery system 1000 includes a battery pack 1100 and the battery management system 1200 provided in any of the above embodiments. It should be noted that the power battery system 1000 provided by the embodiments of the present invention has the beneficial effects of the battery management system 1200 provided in any of the above embodiments, which will not be elaborated here.

[0060] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the present invention can be achieved, which will not be limited herein.

[0061] The above specific embodiments do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A slave board power supply control circuit, characterized in that, Comprising: A control module for generating control signals; A latching module connected to the control module, configured to store the control signals and continuously generate switching signals according to the stored control signals; A switching module connected to a power supply voltage; the switching module is connected to the latching module; the switching module is configured to be connected to a slave control board; the switching module is used to control the power-on or power-off of the slave control board according to the switching signals.

2. The slave board power supply control circuit according to claim 1, wherein The latching module includes a latch or a flip-flop.

3. The slave board power supply control circuit according to claim 1, characterized in that, The switching module includes: a first switching transistor, a second switching transistor, a first resistor, and a second resistor; The control terminal of the first switching transistor is connected to the latching module; the input terminal of the first switching transistor is connected to the control terminal of the second switching transistor; the output terminal of the first switching transistor is grounded; the input terminal of the second switching transistor is connected to the power supply voltage; the output terminal of the second switching transistor is connected to the slave control board; the first resistor is connected between the control terminal and the output terminal of the first switching transistor; the second resistor is connected between the control terminal and the input terminal of the second switching transistor.

4. The slave board power supply control circuit according to claim 1, characterized in that, Further comprising: A power supply module; The control module, the latching module, and the switching module are all connected to the power supply module; The power supply module is used to provide the power supply voltage.

5. The slave board power supply control circuit according to claim 1, characterized in that, The control module includes a battery management controller.

6. A battery management system, characterized in that, Comprising: A master control board and at least one slave control board; The master control board is provided with a slave control board power supply control circuit as described in any one of claims 1-5; The switching module of the slave control board power supply control circuit is connected to the slave control board.

7. The battery management system according to claim 6, wherein The slave control board includes a slave board substrate and an acquisition control module; The acquisition control module is disposed on the slave board substrate and is configured to be connected to a battery pack; the acquisition control module is used to acquire the operation data of the battery pack when the slave control board is powered on.

8. The battery management system according to claim 7, wherein The acquisition control module is connected to the control module, and is further used to determine whether the operation data is abnormal, and generate a wake-up signal to wake up the control module when the operation data is abnormal.

9. The battery management system according to claim 7, wherein, The acquisition control module includes a single cell battery management controller.

10. A power battery system, characterized in that, A battery pack and a battery management system as described in any one of claims 6-9.

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