Battery management system, control method and device thereof, storage medium and energy storage equipment

Abstract

The invention provides a battery management system, a control method and device thereof, a storage medium and energy storage equipment, and relates to the technical field of battery management. A battery management system includes: a battery pack; the sampling unit is connected with the battery pack and is used for acquiring a sampling signal of the battery pack; the first logical operation unit is connected with the sampling unit; the second logical operation unit is connected with the sampling unit; the first output unit is connected with the output end of the battery pack, and the control end of the first output unit is connected with the first logical operation unit; the second output unit is connected with the output end of the battery pack, and the control end of the second output unit is connected with the second logical operation unit; wherein the first logical operation unit and the second logical operation unit respectively control the on-off states of the first output unit and the second output unit according to the sampling signals. According to the invention, the protection stability of the battery management system on the battery pack and the operation safety of the battery pack are improved.

Description

Technical Field

[0001] The present application relates to the field of battery management technology, and in particular to a battery management system and a control method, device, storage medium and energy storage device thereof. Background Art

[0002] In the related art, the BMS system (Battery Management System) adopts a single-channel control method, that is, the MCU (Microcontroller Unit) samples the current, voltage, temperature and other signals of the battery pack, and then controls the on and off of the contactor to protect the battery after calculating and comparing with the threshold.

[0003] When a component in the BMS system fails, the protection function of the BMS system will fail, causing a safety accident. There is a problem that the stability of the BMS system in protecting the battery is poor. Summary of the invention

[0004] The present application aims to solve the problem of poor stability in protecting batteries in the prior art or related art.

[0005] To this end, a first aspect of the present application proposes a battery management system.

[0006] A second aspect of the present application proposes a control method.

[0007] A third aspect of the present application provides a control device.

[0008] A fourth aspect of the present application provides a control device.

[0009] A fifth aspect of the present application provides a readable storage medium.

[0010] The sixth aspect of the present application proposes an energy storage device.

[0011] In view of this, according to the first aspect of the present application, a battery management system is proposed, including: a battery pack; a sampling unit connected to the battery pack and used to collect a sampling signal of the battery pack; a first logic operation unit connected to the sampling unit; a second logic operation unit connected to the sampling unit; a first output unit connected to the output end of the battery pack, and the control end of the first output unit is connected to the first logic operation unit; a second output unit connected to the output end of the battery pack, and the control end of the second output unit is connected to the second logic operation unit; wherein the first logic operation unit and the second logic operation unit respectively control the on and off states of the first output unit and the second output unit according to the sampling signal.

[0012] In this technical solution, the battery management system includes a battery pack and two independent control channels, and the two independent control channels can control the on-off state between the output end of the battery pack and the external circuit. Among them, one control channel includes a sampling unit, a first logic operation unit and a first output unit, and the other control channel includes a sampling unit, a second logic operation unit and a second output unit. The first output unit and the second output unit are both connected between the battery pack and the external circuit. When the first logic operation unit determines that the battery pack has a fault according to the sampling signal, the first output unit can be used to cut off the path between the battery pack and the external circuit. When the second logic operation unit determines that the battery has a fault according to the sampling signal, the second output unit can be used to cut off the path between the battery pack and the external circuit. It should be noted that the external circuit can be a load, in which case the battery pack is used to power the load, and the external circuit can also be a charging circuit, in which case the battery pack is charged by the charging circuit.

[0013] In this technical solution, the sampling unit can collect the sampling signal at the battery pack, and the sampling unit can transmit the sampling signal to the first logic operation unit and the second logic operation unit, the first logic operation unit can control the on-off state of the first output unit, and the second logic operation unit can control the on-off state of the second output unit, wherein the control of the first output unit by the first logic operation unit and the control of the second output unit by the second logic operation unit are independent of each other, that is, the first logic operation unit and the first output unit can independently complete the safety protection function, and the second logic operation unit and the second output unit can also independently complete the safety protection function. When there is a single point failure in the first logic operation unit, the second logic operation unit, the first output unit, and the second output unit, there is at least one control channel left in the battery management system to ensure that the battery pack is in a safe state.

[0014] In this technical solution, the sampling unit can detect whether there is a fault in itself. When there is a fault in the sampling unit, it can send fault prompt information to the first logic operation unit and the second logic operation unit, so that the first logic operation unit controls the first output unit to disconnect, or the second logic operation unit controls the second output unit to disconnect, so as to safely protect the battery pack.

[0015] It should be noted that the power signal, clock signal and reference signal of the first logic operation unit are independent of the power signal, clock signal and reference signal of the second logic operation unit, so as to avoid affecting the first logic operation unit and the second logic operation unit at the same time when there is a fault in the clock signal, reference signal and power signal.

[0016] In the technical solution of the present application, a sampling unit is provided in the battery management system, through which the sampling unit can collect sampling signals of the battery pack, the sampling signals collected by the sampling unit are transmitted to the first logic operation unit and the second logic operation unit respectively, and the first logic operation unit and the second logic operation unit can respectively control the first output unit and the second output unit, so that the first logic operation unit and the first output unit, and the second logic operation unit and the second output unit form two independent control channels, when one of the control channels fails, the other control channel can still play a protective role, thereby improving the stability of the battery management system in protecting the battery pack and the safety of the battery pack operation.

[0017] In some technical solutions, optionally, the first logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and controls the first output unit to disconnect; the second logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and delays controlling the second output unit to disconnect.

[0018] In this technical solution, after receiving the sampling signal, the first logic operation unit can compare the sampling signal with the reference signal to determine whether the battery pack is in a faulty state. When the battery pack is detected to be in a faulty state, the first output unit is controlled to disconnect immediately to cut off the connection between the battery pack and the external circuit. After receiving the sampling signal, the second logic operation unit can also compare the sampling signal with the reference signal to determine whether the battery pack is in a faulty state. When the battery pack is detected to be in a faulty state, the first output unit is controlled to disconnect with a delay to cut off the connection between the battery pack and the external circuit.

[0019] It should be noted that the sampling unit is connected to the first logic operation unit and the second logic operation unit, so the first logic operation unit and the second logic operation unit receive the sampling signal at similar times, and the time required for the first logic operation unit and the second logic operation unit to process and compare the sampling signal is also similar. When the battery pack fails, and the first logic operation unit, the second logic operation unit and the sampling unit are all normal, the first logic operation unit can control the first output unit to disconnect in time. At this time, the second logic operation unit delays the control of the second output unit to disconnect, so that the action of the second output unit is staggered with the action of the first output unit, avoiding the second output unit from disconnecting again when the first output unit has been disconnected, so that the second output unit only performs the disconnection action when the first output unit or the second logic operation unit fails.

[0020] In the technical solution of the present application, when the first logic operation unit determines that the battery pack is in a fault state, it can immediately control the first output unit to disconnect. When the second logic operation unit determines that the battery pack is in a fault state, it delays the control of the second output unit to disconnect, so that the second output unit performs the disconnection action only when the first output unit or the second logic operation unit fails. While improving the stability of the battery management system in protecting the safety of the battery pack, it also avoids meaningless repeated control, thereby achieving a better protection effect on the battery pack.

[0021] In some technical solutions, optionally, the sampling signal includes: a voltage sampling signal and / or a temperature sampling signal, the sampling unit includes: a sampling chip, the sampling end of the sampling chip is connected to the battery pack for collecting the voltage sampling signal and / or the temperature sampling signal, and the output end of the sampling chip is used to transmit the sampling signal.

[0022] In this technical solution, the sampling unit includes a sampling chip, the sampling end of the sampling chip is connected to the battery pack, and the voltage sampling signal and / or temperature sampling signal of the battery pack can be collected through the sampling chip. The sampling chip is connected to the first logic operation unit and the second logic operation unit, and the voltage sampling signal and / or temperature sampling signal collected by the sampling chip is transmitted to the first logic operation unit through the output end.

[0023] In the technical solution of the present application, a sampling chip is provided in the sampling unit so that the sampling unit can collect the temperature sampling signal and the voltage sampling signal of the battery pack, so that the first logic operation unit and the second logic operation unit can monitor the voltage and temperature of the battery pack, and when the voltage and / or temperature of the battery pack are abnormal, the first output unit and the second output unit can be controlled to switch the connection between the output end of the battery pack and the external circuit, thereby providing safety protection for the battery pack.

[0024] In some technical solutions, optionally, the number of battery packs is at least two, the number of sampling chips is the same as the number of battery packs, and at least two sampling chips are respectively connected to at least two battery packs; the sampling unit also includes: a communication circuit, a first end of the communication circuit is connected to the at least two sampling chips, and a second end of the communication circuit is connected to the first logic operation unit and the second logic operation unit.

[0025] In this technical solution, the number of battery packs is at least two, and the at least two battery packs can be connected in series or in parallel with each other. Each battery pack needs to be connected to a sampling chip separately, and at least two sampling chips are provided to respectively collect voltage sampling signals and / or temperature sampling signals of at least two battery packs, thereby achieving monitoring of at least two battery packs separately. When there are at least two sampling chips, a communication circuit is provided in the sampling unit, and the at least two sampling chips are connected to the first logic operation unit and the second logic operation unit through the communication circuit.

[0026] In the technical solution of the present application, when there are multiple battery packs, multiple sampling chips are arranged in the sampling unit, and multiple battery packs are sampled respectively by the multiple sampling chips to improve the sampling accuracy, and the multiple sampling chips are connected to the first logic operation unit and the second logic operation unit through the communication circuit, so as to improve the stability of the first logic operation unit and the second logic operation unit in monitoring the multiple battery packs, further improve the stability of the battery management system in protecting the battery pack, and the safety of the battery pack operation.

[0027] In some technical solutions, optionally, the sampling signal also includes: a current sampling signal, the sampling unit includes: a current sampling element, the sampling end of the current sampling element is connected to the output end of the battery pack, and the output end of the current sampling element is used to transmit the current sampling signal; wherein, the output end of the current sampling element is connected to the first logic operation unit and the second logic operation unit, or the output end of the current sampling element is connected to the sampling chip.

[0028] In this technical solution, the sampling unit also includes a current sampling element, which is connected in series to the output end of the battery pack and can collect a current sampling signal for the current output by the battery pack. The signal output end of the current sampling element is used to output the current sampling signal.

[0029] In this technical solution, the output end of the current sampling element is connected to the first logic operation unit and the second logic operation unit, so that the current sampling signal is directly transmitted to the first logic operation unit and the second logic operation unit.

[0030] In this technical solution, the output end of the current sampling element is connected to the sampling chip, and the current sampling signal collected by the current sampling element is transmitted to the first logic operation unit and the second logic operation unit through the sampling chip.

[0031] In the technical solution of the present application, a current sampling element is connected to the output end of the battery pack, and the current sampling signal of the battery output can be collected through the current sampling element, so as to monitor the current output by the battery pack. When the output current of the battery pack is abnormal, the first output unit and the second output unit can be controlled to switch the connection between the output end of the battery pack and the external circuit, so as to safely protect the battery pack.

[0032] In some technical solutions, optionally, the first output unit and the second output unit include at least one of the following: a switch tube, a relay, a contactor, a DC-DC converter, a switch element, and a controllable fuse.

[0033] In the technical solution of the present application, both the first output unit and the second output unit are selected to be controllably on-off capable elements, and the elements corresponding to the first output unit and the second output unit may be the same or different, thereby improving the flexibility of the battery management system configuration.

[0034] In some technical solutions, optionally, the battery management system also includes: a first power supply connected to the first logic operation unit and used to power the first logic operation unit; a first clock source connected to the first logic operation unit and used to provide a first clock signal to the first logic operation unit; a first reference source connected to the first logic operation unit and used to provide a first reference signal to the first logic operation unit, so that the first logic operation unit determines the fault state of the battery pack based on the sampling signal and the first reference signal; a second power supply connected to the second logic operation unit and used to power the second logic operation unit; a second clock source connected to the second logic operation unit and used to provide a second clock signal to the second logic operation unit; a second reference source connected to the second logic operation unit and used to provide a second reference signal to the second logic operation unit, so that the second logic operation unit determines the fault state of the battery pack based on the sampling signal and the second reference signal.

[0035] In this technical solution, the first logic operation unit is connected to the first power supply, the first clock source and the first reference source, and the first power supply, the first clock source and the first reference source provide the first logic operation unit with a power supply signal, a clock signal and a reference signal. The second logic operation unit is connected to the second power supply, the second clock source and the second reference source, and the second power supply, the second clock source and the second reference source provide the second logic operation unit with a power supply signal, a clock signal and a reference signal.

[0036] In the technical solution of the present application, by independently supplying power to the first logic operation unit and independently transmitting clock signals and reference signals, the situation in which the battery management system fails to protect the battery pack due to problems with any of the power supply signals, clock signals and reference signals in the first logic operation unit or the second logic operation unit is avoided, thereby ensuring the safety of the first logic operation unit and the second logic operation unit in the event of a common cause failure.

[0037] According to the second aspect of the present application, a control method is proposed, which is applied to the battery management system in any of the above technical solutions. The control method includes:

[0038] The first logic operation unit and the second logic operation unit obtain the sampling signal through the sampling unit;

[0039] The first logic operation unit and the second logic operation unit control the on-off state of the first output unit and the second output unit according to the sampling signal respectively.

[0040] In this technical solution, the battery management system includes a battery pack and two independent control channels, and the two independent control channels can control the on-off state between the output end of the battery pack and the external circuit. Among them, one control channel includes a sampling unit, a first logic operation unit and a first output unit, and the other control channel includes a sampling unit, a second logic operation unit and a second output unit. The first output unit and the second output unit are both connected between the battery pack and the external circuit. When the first logic operation unit determines that the battery pack has a fault according to the sampling signal, the first output unit can be used to cut off the path between the battery pack and the external circuit. When the second logic operation unit determines that the battery has a fault according to the sampling signal, the second output unit can be used to cut off the path between the battery pack and the external circuit. It should be noted that the external circuit can be a load, in which case the battery pack is used to power the load, and the external circuit can also be a charging circuit, in which case the battery pack is charged by the charging circuit.

[0041] In this technical solution, the sampling unit can collect the sampling signal at the battery pack, and the sampling unit can transmit the sampling signal to the first logic operation unit and the second logic operation unit, the first logic operation unit can control the on-off state of the first output unit, and the second logic operation unit can control the on-off state of the second output unit, wherein the control of the first output unit by the first logic operation unit and the control of the second output unit by the second logic operation unit are independent of each other, that is, the first logic operation unit and the first output unit can independently complete the safety protection function, and the second logic operation unit and the second output unit can also independently complete the safety protection function. When there is a single point failure in the first logic operation unit, the second logic operation unit, the first output unit, and the second output unit, there is at least one control channel left in the battery management system to ensure that the battery pack is in a safe state.

[0042] In the technical solution of the present application, a sampling unit is provided in the battery management system, through which the sampling unit can collect sampling signals of the battery pack, the sampling signals collected by the sampling unit are transmitted to the first logic operation unit and the second logic operation unit respectively, and the first logic operation unit and the second logic operation unit can respectively control the first output unit and the second output unit, so that the first logic operation unit and the first output unit, and the second logic operation unit and the second output unit form two independent control channels, when one of the control channels fails, the other control channel can still play a protective role, thereby improving the stability of the battery management system in protecting the battery pack and the safety of the battery pack operation.

[0043] In some technical solutions, optionally, the first logic operation unit and the second logic operation unit control the on / off state of the first output unit and the second output unit according to the sampling signal respectively, including:

[0044] The first logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and controls the first output unit to be disconnected;

[0045] The second logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and delays the control of the second output unit to disconnect.

[0046] In this technical solution, after receiving the sampling signal, the first logic operation unit can compare the sampling signal with the reference signal to determine whether the battery pack is in a faulty state. When the battery pack is detected to be in a faulty state, the first output unit is controlled to disconnect immediately to cut off the connection between the battery pack and the external circuit. After receiving the sampling signal, the second logic operation unit can also compare the sampling signal with the reference signal to determine whether the battery pack is in a faulty state. When the battery pack is detected to be in a faulty state, the second output unit is controlled to disconnect with a delay to cut off the connection between the battery pack and the external circuit.

[0047] It should be noted that the sampling unit is connected to the first logic operation unit and the second logic operation unit, so the first logic operation unit and the second logic operation unit receive the sampling signal at similar times, and the time required for the first logic operation unit and the second logic operation unit to process and compare the sampling signal is also similar. When the battery pack fails, and the first logic operation unit, the second logic operation unit and the sampling unit are all normal, the first logic operation unit can control the first output unit to disconnect in time. At this time, the second logic operation unit delays the control of the second output unit to disconnect, so that the action of the second output unit is staggered with the action of the first output unit, avoiding the second output unit from disconnecting again when the first output unit has been disconnected, so that the second output unit only performs the disconnection action when the first output unit or the second logic operation unit fails.

[0048] In the technical solution of the present application, when the first logic operation unit determines that the battery pack is in a fault state, it can immediately control the first output unit to disconnect. When the second logic operation unit determines that the battery pack is in a fault state, it delays the control of the second output unit to disconnect, so that the second output unit performs the disconnection action only when the first output unit or the second logic operation unit fails. While improving the stability of the battery management system in protecting the safety of the battery pack, it also avoids meaningless repeated control, thereby achieving a better protection effect on the battery pack.

[0049] According to a third aspect of the present application, a control device is provided, which is applied to the battery management system in any of the above technical solutions, and the control device includes:

[0050] An acquisition module, used for acquiring a sampling signal;

[0051] The control module is used to control the on / off state of the first output unit and the second output unit according to the sampling signal.

[0052] In this technical solution, the acquisition module includes a sampling unit in the battery management system, and the control module includes a first logic operation unit and a second logic operation unit of the battery management system.

[0053] In the technical solution of the present application, a sampling unit is provided in the battery management system, through which the sampling unit can collect sampling signals of the battery pack, the sampling signals collected by the sampling unit are transmitted to the first logic operation unit and the second logic operation unit respectively, and the first logic operation unit and the second logic operation unit can respectively control the first output unit and the second output unit, so that the first logic operation unit and the first output unit, and the second logic operation unit and the second output unit form two independent control channels, when one of the control channels fails, the other control channel can still play a protective role, thereby improving the stability of the battery management system in protecting the battery pack and the safety of the battery pack operation.

[0054] According to the fourth aspect of the present application, a control device is proposed, the control device includes a processor and a memory, the memory stores a program or instruction, and the program or instruction is executed by the processor to implement the steps of the control method in any of the above technical solutions. Therefore, the control device has all the beneficial effects of the control method in any of the above technical solutions, which will not be repeated here.

[0055] According to the fifth aspect of the present application, a readable storage medium is proposed, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the control method in any of the above-mentioned technical solutions are implemented, thereby having all the beneficial technical effects of the control method in any of the above-mentioned technical solutions.

[0056] According to the sixth aspect of the present application, an energy storage device is proposed, including: a battery management system in any of the above-mentioned technical solutions; and / or a control device in any of the above-mentioned technical solutions; and / or a readable storage medium in any of the above-mentioned technical solutions, thereby having all the beneficial technical effects of the battery management system in any of the above-mentioned technical solutions; and / or the control device in any of the above-mentioned technical solutions; and / or the readable storage medium in any of the above-mentioned technical solutions, which will not be repeated here.

[0057] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0059] Figure 1 One of the circuit topology diagrams of a battery management system provided in some embodiments of the present application is shown;

[0060] Figure 2 A second circuit topology diagram of a battery management system provided in some embodiments of the present application is shown;

[0061] Figure 3 A third circuit topology diagram of a battery management system provided in some embodiments of the present application is shown;

[0062] Figure 4 A schematic flow chart of a control method provided in some embodiments of the present application is shown;

[0063] Figure 5 One of the structural block diagrams of a control device provided in some embodiments of the present application is shown;

[0064] Figure 6 A second structural block diagram of a control device is shown in some embodiments of the present application;

[0065] Figure 7 A structural block diagram of an energy storage device is shown in some embodiments of the present application.

[0066] The reference numerals are as follows:

[0067] 100 battery management system, 110 battery pack, 120 sampling unit, 123 sampling chip, 124 communication circuit, 125 current sampling element, 130 first logic operation unit, 131 first power supply, 132 first clock source, 133 first reference source, 140 second logic operation unit, 141 second power supply, 142 second clock source, 143 second reference source, 150 first output unit, 160 second output unit. DETAILED DESCRIPTION

[0068] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, in the absence of conflict, the present embodiment and the features in the embodiment can be combined with each other.

[0069] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0070] Refer to the following Figures 1 to 7 A battery management system and a control method, apparatus, storage medium, and energy storage device thereof according to some embodiments of the present application are described.

[0071] According to one embodiment of the present application, Figure 1 One of the circuit topology diagrams of a battery management system provided in some embodiments of the present application is shown. Figure 2 FIG2 shows a second circuit topology diagram of a battery management system provided in some embodiments of the present application. Figure 3FIG. 3 shows a circuit topology diagram of a battery management system provided in some embodiments of the present application, such as Figures 1 to 3 As shown, a battery management system 100 is proposed, including: a battery pack 110 , a sampling unit 120 , a first logic operation unit 130 , a second logic operation unit 140 , a first output unit 150 and a second output unit 160 .

[0072] The sampling unit 120 is connected to the battery pack 110 and is used to collect the sampling signal of the battery pack 110; the first logic operation unit 130 is connected to the sampling unit 120; the second logic operation unit 140 is connected to the sampling unit 120; the first output unit 150 is connected to the output end of the battery pack 110, and the control end of the first output unit 150 is connected to the first logic operation unit 130; the second output unit 160 is connected to the output end of the battery pack 110, and the control end of the second output unit 160 is connected to the second logic operation unit 140; wherein the first logic operation unit 130 and the second logic operation unit 140 respectively control the on and off states of the first output unit 150 and the second output unit 160 according to the sampling signal.

[0073] In this embodiment, the battery management system 100 includes a battery pack 110 and two independent control channels, which can control the on-off state between the output end of the battery pack 110 and the external circuit. Among them, one control channel includes a sampling unit 120, a first logic operation unit 130 and a first output unit 150, and the other control channel includes a sampling unit 120, a second logic operation unit 140 and a second output unit 160. The first output unit 150 and the second output unit 160 are both connected between the battery pack 110 and the external circuit. When the first logic operation unit 130 determines that the battery pack 110 has a fault according to the sampling signal, the first output unit 150 can be used to cut off the path between the battery pack 110 and the external circuit. When the second logic operation unit 140 determines that the battery has a fault according to the sampling signal, the second output unit 160 can be used to cut off the path between the battery pack 110 and the external circuit. It should be noted that the external circuit can be a load, in which case the battery pack 110 is used to power the load, and the external circuit can also be a charging circuit, in which case the battery pack 110 is charged by the charging circuit.

[0074] like Figure 2 and Figure 3 As shown, MCU1 is the first logic operation unit 130 , and MUC2 is the second logic operation unit 140 .

[0075] like Figure 1As shown, the first logic operation unit 130 and the first output unit 150 form a control channel 1 , and the second logic operation unit 140 and the second output unit 160 form a control channel 2 .

[0076] Exemplarily, the first output unit 150 is connected between the positive electrode of the battery pack 110 and the external circuit, and the second output unit 160 is connected between the negative electrode of the battery pack 110 and the external circuit. The first output unit 150 and the second output unit 160 are both switch circuits, such as switch tubes, contactors, etc.

[0077] Exemplarily, the first logic operation unit 130 and the second logic operation unit 140 may be MCUs.

[0078] In this embodiment, the sampling unit 120 can collect the sampling signal at the battery pack 110, and the sampling unit 120 can transmit the sampling signal to the first logic operation unit 130 and the second logic operation unit 140, the first logic operation unit 130 can control the on-off state of the first output unit 150, and the second logic operation unit 140 can control the on-off state of the second output unit 160, wherein the control of the first output unit 150 by the first logic operation unit 130 and the control of the second output unit 160 by the second logic operation unit 140 are independent of each other, that is, the first logic operation unit 130 and the first output unit 150 can independently complete the safety protection function, and the second logic operation unit 140 and the second output unit 160 can also independently complete the safety protection function. When there is a single point failure in the first logic operation unit 130, the second logic operation unit 140, the first output unit 150 and the second output unit 160, at least one control channel remains in the battery management system 100 to ensure that the battery pack 110 is in a safe state.

[0079] For example, when there is a single point failure in the first output unit 150, the first logic operation unit 130 determines that there is a failure in the battery pack 110 according to the sampling signal, and the first logic operation unit 130 cannot control the first output unit 150 to perform the on-off action, or when there is a single point failure in the first logic operation unit 130, the first logic operation unit 130 cannot determine that there is a failure in the battery pack 110 according to the sampling signal. Since the second logic operation unit 140 can operate independently for the second output unit 160, the second logic operation unit 140 can also determine that there is a failure in the battery pack 110 according to the sampling signal, and the second logic operation unit 140 controls the second output unit 160 to disconnect, so that the output end of the battery pack 110 can be disconnected from the external circuit, ensuring that the battery pack 110 is in a safe state.

[0080] For example, when there is a single point fault in the second output unit 160, the second logic operation unit 140 determines that there is a fault in the battery pack 110 according to the sampling signal, and the second logic operation unit 140 cannot control the second output unit 160 to perform the on-off action, or when there is a single point fault in the second logic operation unit 140, the second logic operation unit 140 cannot determine that there is a fault in the battery pack 110 according to the sampling signal. Since the first logic operation unit 130 can operate independently of the first output unit 150, the first logic operation unit 130 can also determine that there is a fault in the battery pack 110 according to the sampling signal, and the first logic operation unit 130 controls the first output unit 150 to disconnect, so that the output end of the battery pack 110 can be disconnected from the external circuit, ensuring that the battery pack 110 is in a safe state.

[0081] like Figure 2 and Figure 3 As shown, in this embodiment, the sampling unit 120 can be selected as an AFE (Active Front End) chip with a strong self-diagnosis function. The sampling unit 120 can detect whether there is a fault in itself. When there is a fault in the sampling unit 120, it can send a fault prompt information to the first logic operation unit 130 and the second logic operation unit 140, so that the first logic operation unit 130 controls the first output unit 150 to disconnect, or the second logic operation unit 140 controls the second output unit 160 to disconnect, so as to safely protect the battery pack 110.

[0082] It should be noted that the power signal, clock signal and reference signal of the first logic operation unit 130 are independent of the power signal, clock signal and reference signal of the second logic operation unit 140, so as to avoid affecting both the first logic operation unit 130 and the second logic operation unit 140 when a fault occurs in the clock signal, reference signal and power signal.

[0083] In the embodiment of the present application, by setting a sampling unit 120 in the battery management system 100, the sampling unit 120 can collect the sampling signal of the battery pack 110, and the sampling signal collected by the sampling unit 120 is transmitted to the first logic operation unit 130 and the second logic operation unit 140 respectively, and the first logic operation unit 130 and the second logic operation unit 140 can respectively control the first output unit 150 and the second output unit 160, so that the first logic operation unit 130 and the first output unit 150, and the second logic operation unit 140 and the second output unit 160 form two independent control channels. When one of the control channels fails, the other control channel can still play a protective role, thereby improving the stability of the battery management system 100 in protecting the battery pack 110 and the safety of the operation of the battery pack 110.

[0084] In some embodiments, optionally, the first logic operation unit 130 determines that the battery pack 110 is in a fault state based on the sampling signal, and controls the first output unit 150 to disconnect; the second logic operation unit 140 determines that the battery pack 110 is in a fault state based on the sampling signal, and delays controlling the second output unit 160 to disconnect.

[0085] In this embodiment, after receiving the sampling signal, the first logic operation unit 130 can compare the sampling signal with the reference signal to determine whether the battery pack 110 is in a fault state. When the battery pack 110 is detected to be in a fault state, the first output unit 150 is controlled to be disconnected immediately to cut off the connection between the battery pack 110 and the external circuit. After receiving the sampling signal, the second logic operation unit 140 can also compare the sampling signal with the reference signal to determine whether the battery pack 110 is in a fault state. When the battery pack 110 is detected to be in a fault state, the first output unit 150 is controlled to be disconnected with a delay to cut off the connection between the battery pack 110 and the external circuit.

[0086] It should be noted that the sampling unit 120 is connected to the first logic operation unit 130 and the second logic operation unit 140, so the first logic operation unit 130 and the second logic operation unit 140 receive the sampling signal at similar times, and the time required for the first logic operation unit 130 and the second logic operation unit 140 to process and compare the sampling signal is also similar. When the battery pack 110 fails, and the first logic operation unit 130, the second logic operation unit 140 and the sampling unit 120 are all normal, the first logic operation unit 130 can timely control the first output unit 150 to disconnect. At this time, the second logic operation unit 140 delays the control of the second output unit 160 to disconnect, so that the action of the second output unit 160 is staggered with the action of the first output unit 150, so as to avoid the second output unit 160 from disconnecting again when the first output unit 150 has been disconnected, so that the second output unit 160 performs the disconnection action only when the first output unit 150 or the second logic operation unit 140 fails.

[0087] like Figure 2 and Figure 3 As shown, exemplarily, the first output unit 150 may be selected as a switching element capable of repeatedly switching on and off states, and the second output unit 160 may be a switching element such as a controllable fuse that can only execute the on and off states once. By delaying the melting of the controllable fuse, the controllable fuse will only melt when the first output unit 150 or the first logic operation unit 130 fails, thereby improving the economy of the battery management system 100.

[0088] In the embodiment of the present application, when the first logic operation unit 130 determines that the battery pack 110 is in a fault state, it can immediately control the first output unit 150 to disconnect. When the second logic operation unit 140 determines that the battery pack 110 is in a fault state, it delays the control of the second output unit 160 to disconnect, so that the second output unit 160 performs the disconnection action only when the first output unit 150 or the second logic operation unit 140 fails. While improving the stability of the battery management system 100 in protecting the safety of the battery pack 110, it also avoids meaningless repeated control, thereby achieving a better protection effect on the battery pack 110.

[0089] like Figures 1 to 3 As shown, in some embodiments, optionally, the sampling signal includes: a voltage sampling signal and / or a temperature sampling signal, and the sampling unit 120 includes: a sampling chip 123, the sampling end of the sampling chip 123 is connected to the battery pack 110, and is used to collect the voltage sampling signal and / or the temperature sampling signal, and the output end of the sampling chip 123 is used to transmit the sampling signal.

[0090] In this embodiment, the sampling unit 120 includes a sampling chip 123, and the sampling end of the sampling chip 123 is connected to the battery pack 110, and the voltage sampling signal and / or the temperature sampling signal of the battery pack 110 can be collected through the sampling chip 123. The sampling chip 123 is connected to the first logic operation unit 130 and the second logic operation unit 140, and the voltage sampling signal and / or the temperature sampling signal collected by the sampling chip 123 is transmitted to the first logic operation unit 130 through the output end.

[0091] Exemplarily, the sampling chip 123 may be an AFE (Active Front End) chip, and the sampling chip 123 can actively collect voltage sampling signals and / or temperature sampling signals of the battery pack 110 .

[0092] It should be noted that, when the sampling unit 120 includes a plurality of sampling sub-units, each sampling sub-unit includes a sampling chip 123 .

[0093] In the embodiment of the present application, by setting a sampling chip 123 in the sampling unit 120, the sampling unit 120 can collect the temperature sampling signal and the voltage sampling signal of the battery pack 110, so that the first logic operation unit 130 and the second logic operation unit 140 can monitor the voltage and temperature of the battery pack 110. When the voltage and / or temperature of the battery pack 110 is abnormal, the first output unit 150 and the second output unit 160 can be controlled to switch the connection between the output end of the battery pack 110 and the external circuit, thereby safely protecting the battery pack 110.

[0094] like Figure 3As shown, in some embodiments, optionally, the number of battery packs 110 is at least two, the number of sampling chips 123 is the same as the number of battery packs 110, and at least two sampling chips 123 are respectively connected to at least two battery packs 110; the sampling unit 120 also includes: a communication circuit 124, a first end of the communication circuit 124 is connected to the at least two sampling chips 123, and a second end of the communication circuit 124 is connected to the first logic operation unit 130 and the second logic operation unit 140.

[0095] In this embodiment, the number of battery packs 110 is at least two, and the at least two battery packs 110 can be connected in series or in parallel. Each battery pack 110 needs to be connected to a sampling chip 123 separately. At least two sampling chips 123 are provided to respectively collect voltage sampling signals and / or temperature sampling signals of at least two battery packs 110, thereby achieving the purpose of monitoring at least two battery packs 110 separately. When there are at least two sampling chips 123, a communication circuit 124 is provided in the sampling unit 120, and the at least two sampling chips 123 are connected to the first logic operation unit 130 and the second logic operation unit 140 through the communication circuit 124.

[0096] like Figure 3 As shown, exemplarily, the number of battery packs 110 is 3, and the three battery packs 110 are respectively connected to three sampling chips 123, specifically including: AFE21, AFE22, AFE23, and the three sampling chips 123 are all connected to the first logic operation unit 130 and the second logic operation unit 140 through the communication circuit 124.

[0097] In an embodiment of the present application, when there are multiple battery packs 110, multiple sampling chips 123 are set in the sampling unit 120, and the multiple battery packs 110 are sampled respectively by the multiple sampling chips 123 to improve the accuracy of sampling, and the multiple sampling chips 123 are connected to the first logic operation unit 130 and the second logic operation unit 140 through the communication circuit 124, so as to improve the stability of the first logic operation unit 130 and the second logic operation unit 140 in monitoring the multiple battery packs 110, further improve the stability of the battery management system 100 in protecting the battery pack 110, and the safety of the operation of the battery pack 110.

[0098] like Figure 2 and Figure 3As shown, in some embodiments, optionally, the sampling signal also includes: a current sampling signal, the sampling unit 120 includes: a current sampling element 125, the sampling end of the current sampling element 125 is connected to the output end of the battery pack 110, and the output end of the current sampling element 125 is used to transmit the current sampling signal; wherein, the output end of the current sampling element 125 is connected to the first logic operation unit 130 and the second logic operation unit 140, or the output end of the current sampling element 125 is connected to the sampling chip 123.

[0099] In this embodiment, the sampling unit 120 further includes a current sampling element 125, which is connected in series to the output end of the battery pack 110 and can collect a current sampling signal for the current output by the battery pack 110. The signal output end of the current sampling element 125 is used to output the current sampling signal.

[0100] Exemplarily, the first current sampling element 125 may be selected as at least one of a Hall sensor and a shunt.

[0101] In this embodiment, the output end of the current sampling element 125 is connected to the first logic operation unit 130 and the second logic operation unit 140 , so that the current sampling signal is directly transmitted to the first logic operation unit 130 and the second logic operation unit 140 .

[0102] In this embodiment, the output end of the current sampling element 125 is connected to the sampling chip 123 , and the current sampling signal collected by the current sampling element 125 is transmitted to the first logic operation unit 130 and the second logic operation unit 140 through the sampling chip 123 .

[0103] In the embodiment of the present application, by connecting the current sampling element 125 to the output end of the battery pack 110, the current sampling signal of the battery output can be collected through the current sampling element 125, so as to monitor the current output by the battery pack 110. When the output current of the battery pack 110 is abnormal, the first output unit 150 and the second output unit 160 can be controlled to switch the connection between the output end of the battery pack 110 and the external circuit, so as to safely protect the battery pack 110.

[0104] like Figure 2 and Figure 3 As shown, in some embodiments, optionally, the first output unit 150 and the second output unit 160 include at least one of the following: a switch tube, a relay, a contactor, a DC-DC converter, a switch element, and a controllable fuse.

[0105] In the embodiment of the present application, both the first output unit 150 and the second output unit 160 are elements that can be controlled to be on and off, and the elements corresponding to the first output unit 150 and the second output unit 160 can be the same or different, which improves the configuration flexibility of the battery management system 100.

[0106] like Figure 2 As shown, the first output unit 150 is selected as a DC-DC converter, and the second output unit 160 is selected as a controllable fuse.

[0107] like Figure 3 As shown, the first output unit 150 is selected as the main contactor of the battery management system 100, thereby reusing the original components in the battery management system 100 and reducing the hardware cost of the battery management system 100, and the second output unit 160 is selected as a controllable fuse.

[0108] like Figures 1 to 3 As shown, in some embodiments, optionally, the battery management system 100 further includes: a first power supply 131, connected to the first logic operation unit 130, for supplying power to the first logic operation unit 130; a first clock source 132, connected to the first logic operation unit 130, for providing a first clock signal to the first logic operation unit 130; a first reference source 133, connected to the first logic operation unit 130, for providing a first reference signal to the first logic operation unit 130, so that the first logic operation unit 130 operates based on the sampling signal and the first reference signal Determine the fault state of the battery pack 110; a second power supply 141 is connected to the second logic operation unit 140 and is used to supply power to the second logic operation unit 140; a second clock source 142 is connected to the second logic operation unit 140 and is used to provide a second clock signal to the second logic operation unit 140; a second reference source 143 is connected to the second logic operation unit 140 and is used to provide a second reference signal to the second logic operation unit 140, so that the second logic operation unit 140 determines the fault state of the battery pack 110 based on the sampling signal and the second reference signal.

[0109] In this embodiment, the first logic operation unit 130 is connected to the first power supply 131, the first clock source 132 and the first reference source 133, and the first power supply 131, the first clock source 132 and the first reference source 133 provide a power supply signal, a clock signal and a reference signal to the first logic operation unit 130. The second logic operation unit 140 is connected to the second power supply 141, the second clock source 142 and the second reference source 143, and the second power supply 141, the second clock source 142 and the second reference source 143 provide a power supply signal, a clock signal and a reference signal to the second logic operation unit 140.

[0110] In the embodiment of the present application, by independently supplying power to the first logic operation unit 130 and independently transmitting clock signals and reference signals, the situation in which the battery management system 100 fails to protect the battery pack 110 due to a problem with any of the power supply signals, clock signals and reference signals in the first logic operation unit 130 or the second logic operation unit 140 is avoided, thereby ensuring the safety of the first logic operation unit 130 and the second logic operation unit 140 in the event of a common cause failure.

[0111] According to one embodiment of the present application, Figure 4 A flow chart of a control method provided in some embodiments of the present application is shown. Figure 4 As shown, a control method is proposed, which is applied to the battery management system in any of the above embodiments, and the control method includes:

[0112] Step 402: The first logic operation unit and the second logic operation unit obtain a sampling signal through a sampling unit;

[0113] Step 404: The first logic operation unit and the second logic operation unit control the on / off states of the first output unit and the second output unit respectively according to the sampling signal.

[0114] In this embodiment, the battery management system includes a battery pack and two independent control channels, and the two independent control channels can control the on-off state between the output end of the battery pack and the external circuit. Among them, one control channel includes a sampling unit, a first logic operation unit and a first output unit, and the other control channel includes a sampling unit, a second logic operation unit and a second output unit. The first output unit and the second output unit are both connected between the battery pack and the external circuit. When the first logic operation unit determines that the battery pack has a fault according to the sampling signal, the first output unit can be used to cut off the path between the battery pack and the external circuit. When the second logic operation unit determines that the battery has a fault according to the sampling signal, the second output unit can be used to cut off the path between the battery pack and the external circuit. It should be noted that the external circuit can be a load, in which case the battery pack is used to power the load, and the external circuit can also be a charging circuit, in which case the battery pack is charged by the charging circuit.

[0115] In this embodiment, the sampling unit can collect the sampling signal at the battery pack, and the sampling unit can transmit the sampling signal to the first logic operation unit and the second logic operation unit, the first logic operation unit can control the on-off state of the first output unit, and the second logic operation unit can control the on-off state of the second output unit, wherein the control of the first output unit by the first logic operation unit and the control of the second output unit by the second logic operation unit are independent of each other, that is, the first logic operation unit and the first output unit can independently complete the safety protection function, and the second logic operation unit and the second output unit can also independently complete the safety protection function. When there is a single point failure in the first logic operation unit, the second logic operation unit, the first output unit, and the second output unit, there is at least one control channel left in the battery management system to ensure that the battery pack is in a safe state.

[0116] In an embodiment of the present application, a sampling unit is provided in the battery management system, and a sampling signal of the battery pack can be collected through the sampling unit. The sampling signals collected by the sampling unit are transmitted to the first logic operation unit and the second logic operation unit respectively, and the first logic operation unit and the second logic operation unit can respectively control the first output unit and the second output unit, so that the first logic operation unit and the first output unit, and the second logic operation unit and the second output unit form two independent control channels. When one of the control channels fails, the other control channel can still play a protective role, thereby improving the stability of the battery management system in protecting the battery pack and the safety of the battery pack operation.

[0117] In some embodiments, optionally, the first logic operation unit and the second logic operation unit respectively control the on / off state of the first output unit and the second output unit according to the sampling signal, including:

[0118] The first logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and controls the first output unit to be disconnected;

[0119] The second logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and delays the control of the second output unit to disconnect.

[0120] In this embodiment, after receiving the sampling signal, the first logic operation unit can compare the sampling signal with the reference signal to determine whether the battery pack is in a fault state. When the battery pack is detected to be in a fault state, the first output unit is controlled to disconnect immediately to cut off the connection between the battery pack and the external circuit. After receiving the sampling signal, the second logic operation unit can also compare the sampling signal with the reference signal to determine whether the battery pack is in a fault state. When the battery pack is detected to be in a fault state, the second output unit is controlled to disconnect with a delay to cut off the connection between the battery pack and the external circuit.

[0121] It should be noted that the sampling unit is connected to the first logic operation unit and the second logic operation unit, so the first logic operation unit and the second logic operation unit receive the sampling signal at similar times, and the time required for the first logic operation unit and the second logic operation unit to process and compare the sampling signal is also similar. When the battery pack fails, and the first logic operation unit, the second logic operation unit and the sampling unit are all normal, the first logic operation unit can control the first output unit to disconnect in time. At this time, the second logic operation unit delays the control of the second output unit to disconnect, so that the action of the second output unit is staggered with the action of the first output unit, avoiding the second output unit from disconnecting again when the first output unit has been disconnected, so that the second output unit only performs the disconnection action when the first output unit or the second logic operation unit fails.

[0122] In the embodiment of the present application, when the first logic operation unit determines that the battery pack is in a fault state, it can immediately control the first output unit to disconnect. When the second logic operation unit determines that the battery pack is in a fault state, it delays the control of the second output unit to disconnect, so that the second output unit performs the disconnection action only when the first output unit or the second logic operation unit fails. While improving the stability of the battery management system in protecting the safety of the battery pack, it also avoids meaningless repeated control, thereby achieving a better protection effect on the battery pack.

[0123] According to one embodiment of the present application, Figure 5 One of the structural block diagrams of a control device provided in some embodiments of the present application is shown. Figure 5 As shown, a control device 500 is proposed, which is applied to the battery management system in any of the above embodiments. The control device 500 includes:

[0124] An acquisition module 502 is used to acquire a sampled signal;

[0125] The control module 504 is used to control the on / off state of the first output unit and the second output unit according to the sampling signal.

[0126] In this embodiment, the acquisition module 502 includes a sampling unit in the battery management system, and the control module 504 includes a first logic operation unit and a second logic operation unit of the battery management system.

[0127] In an embodiment of the present application, a sampling unit is provided in the battery management system, and a sampling signal of the battery pack can be collected through the sampling unit. The sampling signals collected by the sampling unit are transmitted to the first logic operation unit and the second logic operation unit respectively, and the first logic operation unit and the second logic operation unit can respectively control the first output unit and the second output unit, so that the first logic operation unit and the first output unit, and the second logic operation unit and the second output unit form two independent control channels. When one of the control channels fails, the other control channel can still play a protective role, thereby improving the stability of the battery management system in protecting the battery pack and the safety of the battery pack operation.

[0128] In some embodiments, optionally, the control module 504 is configured to determine that the battery pack is in a fault state based on the sampling signal, and control the first output unit to be disconnected;

[0129] The control module 504 is used to determine that the battery pack is in a fault state based on the sampling signal, and delay control to disconnect the second output unit.

[0130] In this embodiment, the first logic operation unit in the control module 504 performs an action of controlling the first output unit to be disconnected, and the second logic operation unit in the control module 504 performs an action of controlling the second output unit to be disconnected.

[0131] In the embodiment of the present application, when the first logic operation unit determines that the battery pack is in a fault state, it can immediately control the first output unit to disconnect. When the second logic operation unit determines that the battery pack is in a fault state, it delays the control of the second output unit to disconnect, so that the second output unit performs the disconnection action only when the first output unit or the second logic operation unit fails. While improving the stability of the battery management system in protecting the safety of the battery pack, it also avoids meaningless repeated control, thereby achieving a better protection effect on the battery pack.

[0132] According to one embodiment of the present application, Figure 6 FIG. 2 shows a second structural block diagram of a control device provided in some embodiments of the present application, such as Figure 6 As shown, the control device 600 of the battery management system includes a processor 602 and a memory 604. The memory 604 stores a program or instruction. When the program or instruction is executed by the processor 602, the steps of the control method in any of the above embodiments are implemented. Therefore, the control device 600 of the battery management system has all the beneficial effects of the control method in any of the above embodiments, which will not be repeated here.

[0133] According to one embodiment of the present application, optionally, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the control method of the battery management system in any of the above embodiments are implemented, thereby having all the beneficial technical effects of the control method of the battery management system in any of the above embodiments.

[0134] The readable storage medium includes a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0135] A computer readable storage medium may be a tangible device that can retain and store instructions for use by an instruction execution device. A computer readable storage medium may be an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the above devices, but is not limited thereto. A non-exhaustive list of more specific examples of computer readable storage media includes: portable computer floppy disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD), memory card, floppy disk, encoding mechanical device (such as a punch card or a groove with a raised structure with instructions recorded) and any suitable combination of the above devices. The computer readable storage medium used herein should not be understood as a transmission signal itself, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium, or an electrical signal transmitted through a wire, etc.

[0136] According to one embodiment of the present application, Figure 7 A structural block diagram of an energy storage device is shown in some embodiments of the present application. Figure 7 As shown, the energy storage device 700 includes: the battery management system 100 in any of the above embodiments; and / or the control device 500 in any of the above embodiments; and / or the readable storage medium 702 in any of the above embodiments, and thus has all the beneficial technical effects of the battery management system 100 in any of the above embodiments; and / or the control device 500 in any of the above embodiments; and / or the readable storage medium 702 in any of the above embodiments, which will not be repeated here.

[0137] Exemplarily, the energy storage device 700 is connected to a photovoltaic module, and the electrical energy in the photovoltaic module can be stored in a battery pack in the energy storage device.

[0138] It should be clarified that in the claims, specification and drawings of the present application, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the purpose of more conveniently describing the present application and making the description process easier, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limitations on the present application; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

[0139] In the claims, specification and drawings of the present application, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the claims, specification and drawings of the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0140] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery management system, characterized in that: include: Battery pack; A sampling unit, connected to the battery pack, for collecting a sampling signal of the battery pack; A first logic operation unit connected to the sampling unit; A second logic operation unit connected to the sampling unit; A first output unit connected to the output end of the battery pack, and a control end of the first output unit connected to the first logic operation unit; A second output unit is connected to the output end of the battery pack, and a control end of the second output unit is connected to the second logic operation unit; The first logic operation unit and the second logic operation unit respectively control the on / off states of the first output unit and the second output unit according to the sampling signal.

2. The battery management system according to claim 1, characterized in that: The first logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and controls the first output unit to be disconnected; The second logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and delays controlling the second output unit to be disconnected.

3. The battery management system according to claim 1, characterized in that: The sampling signal includes: a voltage sampling signal and / or a temperature sampling signal, and the sampling unit includes: A sampling chip, wherein the sampling end of the sampling chip is connected to the battery pack and is used to collect the voltage sampling signal and / or the temperature sampling signal, and the output end of the sampling chip is used to transmit the sampling signal.

4. The battery management system according to claim 3, characterized in that: The number of the battery packs is at least two, the number of the sampling chips is the same as the number of the battery packs, and at least two of the sampling chips are respectively connected to at least two of the battery packs; The sampling unit further includes: a communication circuit, a first end of the communication circuit is connected to at least two of the sampling chips, and a second end of the communication circuit is connected to the first logic operation unit and the second logic operation unit.

5. The battery management system according to claim 3, characterized in that: The sampling signal also includes: a current sampling signal, and the sampling unit includes: A current sampling element, wherein a sampling end of the current sampling element is connected to an output end of the battery pack, and the output end of the current sampling element is used to transmit the current sampling signal; The output end of the current sampling element is connected to the first logic operation unit and the second logic operation unit, or the output end of the current sampling element is connected to the sampling chip.

6. The battery management system according to any one of claims 1 to 5, characterized in that: The first output unit and the second output unit include at least one of the following: a switch tube, a relay, a contactor, a DC-DC converter, a MOS tube, and a controllable fuse.

7. The battery management system according to any one of claims 1 to 5, characterized in that: Also includes: a first power supply, connected to the first logic operation unit, and configured to supply power to the first logic operation unit; A first clock source, connected to the first logic operation unit, and configured to provide a first clock signal to the first logic operation unit; a first reference source connected to the first logic operation unit and configured to provide a first reference signal to the first logic operation unit, so that the first logic operation unit determines a fault state of the battery pack based on the sampling signal and the first reference signal; a second power supply, connected to the second logic operation unit, and configured to supply power to the second logic operation unit; a second clock source, connected to the second logic operation unit, and configured to provide a second clock signal to the second logic operation unit; A second reference source is connected to the second logic operation unit and is used to provide a second reference signal to the second logic operation unit, so that the second logic operation unit determines the fault state of the battery pack based on the sampling signal and the second reference signal.

8. A control method, characterized in that: Applied to the battery management system according to any one of claims 1 to 7, the control method comprises: The first logic operation unit and the second logic operation unit obtain the sampling signal through the sampling unit; The first logic operation unit and the second logic operation unit control the on-off state of the first output unit and the second output unit respectively according to the sampling signal.

9. The control method according to claim 8, characterized in that: The first logic operation unit and the second logic operation unit respectively control the on-off state of the first output unit and the second output unit according to the sampling signal, including: The first logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and controls the first output unit to be disconnected; The second logic operation unit determines that the battery pack is in a fault state based on the sampling signal, and delays controlling the second output unit to be disconnected.

10. A control device, characterized in that: The battery management system according to any one of claims 1 to 7, wherein the control device comprises: An acquisition module, used for acquiring a sampling signal; The control module is used to control the on / off state of the first output unit and the second output unit according to the sampling signal.

11. A control device, characterized in that: include: processor; A memory, wherein a program or instruction is stored in the memory, and the processor implements the steps of the control method as claimed in claim 8 or 9 when executing the program or instruction in the memory.

12. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the control method according to any one of claims 8 or 9 are implemented.

13. An energy storage device, characterized in that: include: The battery management system according to any one of claims 1 to 7; and / or The control device according to claim 10 or 11; and / or The readable storage medium of claim 12.

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