Battery system and energy storage device

Abstract

The application provides a battery system and an energy storage device. The battery system comprises a battery and a BDU module. The BDU module comprises a switch module. A first end of the switch module is connected with the battery, and a second end of the switch module is used for being connected with an external device. The switch module comprises at least two switch elements connected in parallel. Each switch element can be switched between a closed state and an open state, so that each switch element can connect the battery and the external device. The battery system provided by the application ensures that the battery system can work stably, and improves the safety redundancy of the battery system.

Description

Technical Field

[0001] This application relates to the field of battery system technology, specifically to battery systems and energy storage devices. Background Technology

[0002] A battery system is a comprehensive power storage and supply device with an electrochemical energy storage unit as its core, integrating energy management, safety protection, and thermal control modules. It is widely used in aircraft, new energy vehicles, renewable energy storage, portable electronic devices, and industrial backup power supplies.

[0003] The safety redundancy of battery systems in related technologies still needs to be improved. Utility Model Content

[0004] The embodiments of this application provide a battery system and energy storage device, which can improve the technical problems such as the need to improve the safety redundancy of battery systems.

[0005] In a first aspect, embodiments of this application provide a battery system, comprising:

[0006] Battery;

[0007] The BDU module includes a switch module, a first terminal of which is connected to the battery, and a second terminal of which is used to connect to an external device; wherein...

[0008] The switching module includes at least two switching elements connected in parallel, each of which can switch between a closed state and an open state, so that each of the switching elements can connect the battery and the external device.

[0009] In one embodiment, when the second end of the switch module is connected to the external device, one of the switch elements is in the closed state and the other switch elements are in the open state.

[0010] By adopting the above technical solution, since each switching element can connect the battery and external devices, only one switching element is switched to the closed state at a time, while the other switching elements remain in the open state. That is, only one switching element will switch states at a time, which can effectively extend the service life of the entire switching module.

[0011] In one embodiment, the battery system further includes a control module connected to the switch module, the control module being used to control the switch module so that different switch elements are in a closed state in turn.

[0012] By adopting the above technical solution, different switching elements are closed in turn, so that the performance and lifespan of different switching elements are kept as consistent as possible, avoiding the premature end of the lifespan of some switching elements, and ensuring that the system has multiple parallel switching elements to ensure the safety redundancy of the system.

[0013] In one embodiment, the BDU module further includes a discharge circuit, a first terminal of which is connected to the battery, and a second terminal of which is used to connect to the external device.

[0014] The switching module includes a first switching module connected to the discharge circuit. The first switching module includes at least two first switching elements connected in parallel, and each of the first switching elements can be used to connect the battery and the external device.

[0015] By adopting the above technical solution, the battery is connected to an external device through a discharge circuit, enabling the battery to discharge. A first switch module is installed in the discharge circuit, which can keep the discharge circuit in a connected or disconnected state. The first switch module includes at least two parallel first switch elements. When any one of the first switch elements is closed, the first switch module can connect the battery and the external device. This ensures that each switch element can connect the battery and the external device, effectively preventing the battery system from failing to discharge properly due to the failure of a single first switch element. This guarantees a stable connection between the battery and the external device, and different first switch elements can work in turn, avoiding a shortened lifespan due to high-frequency opening and closing, thus improving the safety redundancy of the battery system.

[0016] In one embodiment, the discharge circuit includes a positive discharge circuit and a negative discharge circuit. The positive discharge circuit is used to connect the positive terminal of the battery and the positive terminal of the external device, and the negative discharge circuit is used to connect the negative terminal of the battery and the negative terminal of the external device. At least one of the positive discharge circuit and the negative discharge circuit is provided with the first switching module.

[0017] By adopting the above technical solution, a first switching module is provided at at least one of the positive and negative discharge circuits. This first switching module allows at least one of the positive and negative discharge circuits to switch between a connected and disconnected state. The first switching module includes at least two parallel first switching elements. Closing any one of these elements ensures that the positive and / or negative discharge circuits are connected, effectively preventing the battery from failing to connect properly to external devices due to damage to a single first switching element, thus improving the safety redundancy of the battery system.

[0018] In one embodiment, the BDU module includes at least two discharge circuits, which are connected in parallel.

[0019] By adopting the above technical solution and setting at least two parallel discharge circuits, different discharge circuits can be used to connect the battery and external devices. Thus, when one discharge circuit fails, the other discharge circuits can be used to connect the battery and external devices, allowing the battery system to discharge normally and effectively improving the redundancy of the battery system.

[0020] In one embodiment, the BDU module further includes a charging circuit, a first terminal of which is connected to the battery, and a second terminal of which is used to connect to the external device.

[0021] The switching module includes a second switching module connected to the charging circuit. The second switching module includes at least two second switching elements connected in parallel, and each second switching element can be used to connect the battery and the external device.

[0022] By adopting the above technical solution, the battery is connected to an external device via a charging circuit, enabling the battery to be charged. A second switch module is provided in the charging circuit, which can keep the charging circuit in an on or off state. The second switch module includes at least two parallel second switch elements. When any one of the second switch elements is closed, the second switch module can connect the battery and the external device. This ensures that each second switch element can connect the battery and the external device, effectively preventing the battery system from failing to charge due to the failure of a single second switch element. This guarantees a stable connection between the battery and the external device, and different second switch elements can work in turn, avoiding a shortened lifespan of the switch elements due to high-frequency opening and closing, thus improving the safety redundancy of the battery system.

[0023] In one embodiment, the charging circuit includes a positive charging circuit and a negative charging circuit. The positive charging circuit is used to connect the positive terminal of the battery to the positive terminal of the external device, and the negative charging circuit is used to connect the negative terminal of the battery to the negative terminal of the external device. At least one of the positive charging circuit and the negative charging circuit is provided with the second switching module.

[0024] By adopting the above technical solution, a second switching module is provided at at least one of the positive and negative charging circuits. This second switching module allows at least one of the positive and negative charging circuits to switch between a connected and a disconnected state. The second switching module includes at least two parallel second switching elements. Closing any one of the second switching elements ensures that the positive and / or negative charging circuits are connected, effectively preventing the battery and external devices from failing due to damage to a single second switching element, thus improving the safety redundancy of the battery system.

[0025] In one embodiment, the BDU module includes at least two charging circuits connected in parallel.

[0026] By adopting the above technical solution and setting at least two parallel charging circuits, different charging circuits can be used to connect the battery and external devices. Thus, when one charging circuit fails, the other charging circuits can be used to connect the battery and external devices, allowing the battery system to charge normally and effectively improving the redundancy of the battery system.

[0027] In one embodiment, the BDU module further includes a pre-charging circuit, a first end of which is connected to the battery, and a second end of which is used to connect to the external device.

[0028] The switching module includes a third switching module connected to the pre-charging circuit. The third switching module includes at least two third switching elements connected in parallel, and each of the third switching elements can connect the battery and the external device.

[0029] By adopting the above technical solution, the battery is connected to the external device through a pre-charging circuit, enabling pre-charging of the battery. A third switch module is installed in the pre-charging circuit, which can keep the pre-charging circuit in a connected or disconnected state. The third switch module includes at least two parallel third switch elements. When any one of the third switch elements is closed, the third switch module can connect the battery and the external device. This ensures that each switch element can connect the battery and the external device, effectively preventing the battery system from failing to pre-charge due to the failure of a single third switch element. This guarantees a stable connection between the battery and the external device, and different third switch elements can work in turn, avoiding a shortened lifespan of the switch elements due to high-frequency opening and closing, thus improving the safety redundancy of the battery system.

[0030] In one embodiment, the BDU module further includes a main positive circuit and a main negative circuit. The first terminal of the main positive circuit is connected to the positive terminal of the battery, and the second terminal of the main positive circuit is used to connect to the positive terminal of the external device. The first terminal of the main negative circuit is connected to the negative terminal of the battery, and the second terminal of the main negative circuit is used to connect to the negative terminal of the external device. At least one of the main positive circuit and the main negative circuit is connected to the switch module.

[0031] By adopting the above technical solution, the switching module can switch between the connected and disconnected states of the main positive circuit or the main negative circuit. Since the switching module includes at least two parallel switching elements, the switching module can connect the battery and external devices when any one of the switching elements is in the closed state. Thus, each switching element can connect the battery and external devices, effectively avoiding the situation where the battery system cannot work properly due to the failure of a certain switching element. This ensures that the main positive circuit and the main negative circuit can stably connect the battery and external devices. Furthermore, different switching elements can work in turn, avoiding the shortening of the lifespan of the switching elements due to high-frequency opening and closing, and improving the safety redundancy of the battery system.

[0032] Secondly, embodiments of this application provide an energy storage device, including the battery system described above.

[0033] Thirdly, embodiments of this application provide a control method based on the battery system described above, comprising:

[0034] In response to different power-on commands, different switching elements are controlled to close in turn.

[0035] By adopting the above technical solution, and by controlling different switching elements to close in turn, the number of switching elements responding to the same power-on command is reduced. This effectively reduces the number of times a single switching element is opened and closed, increases the service life of the switching element, and avoids the situation where the service life of a certain switching element is lower than that of other switching elements due to excessive opening and closing frequency. This prevents the premature damage of a certain switching element and ensures the safety redundancy of the battery system.

[0036] In one embodiment, the step of controlling different switching elements to close in turn in response to different power-on commands includes:

[0037] Upon receiving the current power-on command, the target switching element is controlled to close, wherein the target switching element is a switching element that did not close after receiving the previous power-on command.

[0038] By adopting the above technical solution, the switch element that has not closed after receiving the previous power-on command is set as the target switch element. After receiving the current power-on command, the target switch element is controlled to close, thereby reducing the number of times the same switch element is opened and closed, increasing the service life of the switch element, avoiding the situation where the service life of a certain switch element is lower than that of other switch elements due to the high frequency of opening and closing, preventing the premature damage of a certain switch element, and ensuring the safety redundancy of the battery system.

[0039] In one embodiment, after the step of controlling the target switching element to close, the method further includes:

[0040] If the target switching element is not closed, then at least one of the other switching elements is controlled to be in a closed state.

[0041] By adopting the above technical solutions, the battery system can be guaranteed to function normally.

[0042] Fourthly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the control method described above.

[0043] Fifthly, embodiments of this application provide a non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium including a computer program, which, when executed by the processor, implements the control method described above.

[0044] Sixthly, embodiments of this application provide a computer program product, the computer program product including a computer program, which, when executed by the processor, implements the control method described above.

[0045] The beneficial effects of the embodiments of this application are as follows:

[0046] In the embodiments of this application, when the switch module connects the battery and an external device, the battery pack discharges or charges. The switch module includes at least two parallel switching elements, each of which can be used to connect the battery and the external device, ensuring the normal operation of the battery system. Furthermore, different switching elements can be closed alternately, effectively increasing the lifespan of the switch module. Simultaneously, if one switching element fails, the battery and external device can still be connected through the other switching elements, ensuring stable operation of the battery system and improving its safety redundancy. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the battery system provided in an embodiment of this application;

[0049] Figure 2 This is a circuit diagram of a battery system provided in an embodiment of this application;

[0050] Figure 3 This is a circuit diagram of a battery system provided in an embodiment of this application, wherein the discharge circuit includes a switching module;

[0051] Figure 4 This is a circuit diagram of a battery system provided in an embodiment of this application, wherein the charging circuit includes a switching module;

[0052] Figure 5 This is a circuit diagram of a battery system provided in an embodiment of this application, wherein the pre-charging circuit includes a switching module;

[0053] Figure 6 A flowchart of a control method provided for embodiments of this application;

[0054] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Battery; 2. BDU module; 20. Switch module; 21. Discharge circuit; 22. Charging circuit; 23. Pre-charge circuit; 24. Main positive circuit; 25. Main negative circuit; 201. First switch module; 202. Second switch module; 203. Third switch module; 210. Switching element; 211. First switching element; 212. Positive discharge circuit; 213. Negative discharge circuit; 221. Second switching element; 222. Positive charging circuit; 223. Negative charging circuit. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0058] The following is combined Figures 1 to 7 This application describes the battery system and energy storage device.

[0059] According to the embodiments of the first aspect of this application, such as Figure 1 and Figure 2 As shown, the battery system includes a battery 1 and a BDU module 2. The BDU module 2 includes a switch module 20. The first end of the switch module 20 is connected to the battery 1, and the second end of the switch module 20 is used to connect to an external device.

[0060] The switch module 20 includes at least two switch elements 210 connected in parallel, each switch element 210 being switchable between a closed state and an open state, so that each switch element 210 can connect the battery 1 and an external device.

[0061] According to the battery system of this application embodiment, when the switch module 20 connects the battery 1 and the external device, the battery 1 pack is discharged or charged. The switch module 20 includes at least two parallel switching elements 210, each of which can be used to connect the battery 1 and the external device, enabling the battery system to operate normally. Furthermore, different switching elements 210 can be closed alternately, effectively increasing the service life of the switch module 20. Simultaneously, when one switching element 210 fails, the battery 1 and the external device can still be connected through the other switching elements 210, ensuring stable operation of the battery system and improving the safety redundancy of the battery system.

[0062] Understandably, in related technologies, the battery system's switching module 20 typically has only one relay. Therefore, whenever the battery system needs to charge or discharge, the relay needs to switch states. This results in high relay usage frequency, short relay lifespan, and susceptibility to failure. When a relay malfunctions, the battery system cannot function properly, leading to insufficient safety redundancy. This application connects the battery 1 and external devices via a switching module 20. The switching module 20 includes at least two parallel-connected switching elements 210. Closing any one of these switching elements connects the battery 1 and the external device, enabling the battery system to function normally. Different switching elements 210 can be closed alternately, effectively reducing the number of times a single switching element 210 is opened and closed. Furthermore, when some switching elements 210 fail, others can be closed, ensuring the battery system can function normally and thus effectively improving the redundancy of the battery system.

[0063] In some examples, external devices include electrical appliances and charging devices.

[0064] In some examples, the switching element 210 is, for example, a relay or a MOSFET or any other suitable switching device.

[0065] In some embodiments, when the second end of the switch module 20 is connected to an external device, one of the switch elements 210 is in a closed state and the other switch elements 210 are in an open state.

[0066] It is understandable that, since each switching element 210 can connect the battery 1 and external devices, only one switching element 210 is switched to the closed state at a time, while the other switching elements 210 remain in the open state. That is, only one switching element 210 will switch states at a time, which can effectively extend the service life of the entire switching module 20.

[0067] In some embodiments, the battery system further includes a control module connected to the switch module 20. The control module is used to control the switch module 20 so that different switching elements 210 are in a closed state in turn.

[0068] It is understandable that by controlling different switching elements 210 to close in turn, the difference in the number of times different switching elements 210 close can be reduced, thereby reducing the difference in service life between different switching elements 210.

[0069] It is understandable that if a specific switching element 210 is always closed first, there will be significant differences in the operating states of the different switching elements 210. For example, this could lead to the premature end of the lifespan of that specific switching element 210, resulting in insufficient safety redundancy in the battery system. Therefore, this embodiment allows different switching elements 210 to close in turn, ensuring that the performance and lifespan of different switching elements 210 are as consistent as possible, preventing the premature end of the lifespan of some switching elements 210, and ensuring that the system has multiple parallel switching elements 210 to guarantee system safety redundancy.

[0070] In some embodiments, such as Figure 3 As shown, the BDU module 2 also includes a discharge circuit 21. The first end of the discharge circuit 21 is connected to the battery 1, and the second end of the discharge circuit 21 is used to connect to an external device.

[0071] The switching module 20 includes a first switching module 201, which is connected to the discharge circuit 21. The first switching module 201 includes at least two first switching elements 211 connected in parallel, and each first switching element 211 can be used to connect the battery 1 and an external device.

[0072] Understandably, the discharge circuit 21 connects the battery 1 to the external device, allowing the battery 1 to discharge. A first switch module 201 is provided at the discharge circuit 21. The first switch module 201 can keep the discharge circuit 21 in an on or off state. The first switch module 201 includes at least two first switch elements 211 connected in parallel. When any one of the first switch elements 211 is in the closed state, the first switch module 201 can connect the battery 1 to the external device. Therefore, each switch element 210 can connect the battery 1 to the external device, effectively preventing the battery system from failing to discharge normally due to the failure of a single first switch element 211. This ensures that the discharge circuit 21 can stably connect the battery 1 to the external device. Furthermore, different first switch elements 211 can work in turn, avoiding a shortened lifespan of the switch elements 210 due to high-frequency opening and closing, thus improving the safety redundancy of the battery system.

[0073] In some examples, the external device in this embodiment is an electrical appliance or a load.

[0074] Specifically, such as Figure 3 As shown, the discharge circuit 21 includes a positive discharge circuit 212 and a negative discharge circuit 213. The positive discharge circuit 212 is used to connect the positive terminal of the battery 1 to the positive terminal of the external device, and the negative discharge circuit 213 is used to connect the negative terminal of the battery 1 to the negative terminal of the external device. At least one of the positive discharge circuit 212 and the negative discharge circuit 213 is provided with a first switch module 201.

[0075] It is understandable that the positive terminal of battery 1, the positive discharge circuit 212, the external device, the negative discharge circuit 213, and the negative terminal of battery 1 form a loop. When the positive discharge circuit 212 and / or the negative discharge circuit 213 are disconnected, the connection between battery 1 and the external device can be disconnected.

[0076] By providing a first switching module 201 at at least one of the positive discharge circuit 212 and the negative discharge circuit 213, the first switching module 201 can switch at least one of the positive discharge circuit 212 and the negative discharge circuit 213 between a connected state and a disconnected state. The first switching module 201 includes at least two first switching elements 211 connected in parallel. Closing any one of the first switching elements 211 can make the positive discharge circuit 212 and / or the negative discharge circuit 213 connected, effectively avoiding the situation where the battery 1 cannot be properly connected to the external device due to the failure of a certain first switching element 211, and improving the safety redundancy of the battery system.

[0077] When the positive discharge circuit 212 is equipped with a first switch module 201, since the first switch module 201 includes at least two parallel first switch elements 211, the positive discharge circuit 212 can connect the battery 1 and the external device when any one of the first switch elements 211 is in the closed state. This effectively avoids the situation where the positive discharge circuit 212 cannot connect the battery 1 and the external device normally due to the failure of a certain first switch element 211, ensuring that the positive discharge circuit 212 can stably connect the battery 1 and the external device. Moreover, different first switch elements 211 can work in turn, avoiding the shortening of the service life of the switch element 210 due to high frequency of opening and closing, and improving the safety redundancy of the battery system.

[0078] When the negative discharge circuit 213 is equipped with a first switch module 201, since the first switch module 201 includes at least two parallel first switch elements 211, the negative discharge circuit 213 can connect the battery 1 and the external device when any one of the first switch elements 211 is in the closed state. This effectively avoids the situation where the negative discharge circuit 213 cannot connect the battery 1 and the external device normally due to the damage of a certain first switch element 211, ensuring that the negative discharge circuit 213 can stably connect the battery 1 and the external device. Moreover, different first switch elements 211 can work in turn, avoiding the shortening of the service life of the switch element 210 due to high frequency of opening and closing, and improving the safety redundancy of the battery system.

[0079] In some embodiments, the BDU module 2 includes at least two discharge circuits 21, which are connected in parallel.

[0080] It is understandable that by setting at least two parallel discharge circuits 21, different discharge circuits 21 can be used to connect the battery 1 and external devices. Thus, when one of the discharge circuits 21 fails, the other discharge circuits 21 can be used to connect the battery 1 and external devices, so that the battery system can discharge normally, effectively improving the redundancy of the battery system.

[0081] In some embodiments, such as Figure 4 As shown, the BDU module 2 also includes a charging circuit 22. The first end of the charging circuit 22 is connected to the battery 1, and the second end of the charging circuit 22 is used to connect to an external device.

[0082] The switching module 20 includes a second switching module 202, which is connected to the charging circuit 22. The second switching module 202 includes at least two second switching elements 221 connected in parallel, and each second switching element 221 can be used to connect the battery 1 and an external device.

[0083] Understandably, the charging circuit 22 connects the battery 1 to an external device, enabling the battery 1 to be charged. A second switch module 202 is provided at the charging circuit 22. The second switch module 202 can keep the charging circuit 22 in an on or off state. The second switch module 202 includes at least two parallel second switch elements 221. When any one of the second switch elements 221 is closed, the second switch module 202 can connect the battery 1 to the external device. This effectively prevents the battery system from failing to charge due to the damage of a single second switch element 221, ensuring a stable connection between the charging circuit 22 and the battery 1. Furthermore, different second switch elements 221 can work in turn, preventing a shortened lifespan of the switch elements 210 due to frequent opening and closing, thus improving the safety redundancy of the battery system.

[0084] In some examples, the external device in this embodiment is a charging device.

[0085] Specifically, such as Figure 4 As shown, the charging circuit 22 includes a positive charging circuit 222 and a negative charging circuit 223. The positive charging circuit 222 is used to connect the positive terminal of the battery 1 to the positive terminal of the external device, and the negative charging circuit 223 is used to connect the negative terminal of the battery 1 to the negative terminal of the external device. At least one of the positive charging circuit 222 and the negative charging circuit 223 is provided with a second switch module 202.

[0086] It is understandable that the positive terminal of battery 1, the positive charging circuit 222, the external device, the negative charging circuit 223, and the negative terminal of battery 1 form a loop. When the positive charging circuit 222 and / or the negative charging circuit 223 are disconnected, the connection between battery 1 and the external device can be disconnected.

[0087] By providing a second switch module 202 at at least one of the positive charging circuit 222 and the negative charging circuit 223, the second switch module 202 can switch at least one of the positive charging circuit 222 and the negative charging circuit 223 between a connected state and a disconnected state. The second switch module 202 includes at least two parallel second switch elements 221. Closing any second switch element 221 can put the positive charging circuit 222 and / or the negative charging circuit 223 into a connected state, effectively avoiding the situation where the battery 1 cannot be properly connected to the external device due to the failure of a second switch element 221, and improving the safety redundancy of the battery system.

[0088] When the positive charging circuit 222 is equipped with a second switch module 202, since the second switch module 202 includes at least two parallel second switch elements 221, the positive charging circuit 222 can connect the battery 1 and the external device when any one of the second switch elements 221 is in the closed state. This effectively avoids the situation where the positive charging circuit 222 cannot connect the battery 1 and the external device normally due to the failure of a certain second switch element 221, ensuring that the positive charging circuit 222 can stably connect the battery 1 and the external device. Moreover, different second switch elements 221 can work in turn, avoiding the shortening of the service life of the switch element 210 due to high frequency of opening and closing, and improving the safety redundancy of the battery system.

[0089] When the negative charging circuit 223 is equipped with a second switch module 202, since the second switch module 202 includes at least two parallel second switch elements 221, the negative charging circuit 223 can connect the battery 1 and the external device when any one of the second switch elements 221 is in the closed state. This effectively avoids the situation where the negative charging circuit 223 cannot connect the battery 1 and the external device normally due to the damage of a certain second switch element 221, ensuring that the negative charging circuit 223 can stably connect the battery 1 and the external device. Moreover, different second switch elements 221 can work in turn, avoiding the shortening of the service life of the switch element 210 due to high frequency of opening and closing, and improving the safety redundancy of the battery system.

[0090] In some embodiments, the BDU module 2 includes at least two charging circuits 22, which are connected in parallel.

[0091] It is understandable that by setting at least two parallel charging circuits 22, different charging circuits 22 can be used to connect the battery 1 and external devices. Thus, when one of the charging circuits 22 fails, the other charging circuits 22 can be used to connect the battery 1 and external devices, so that the battery system can be charged normally, effectively improving the redundancy of the battery system.

[0092] In some embodiments, such as Figure 5 As shown, the BDU module 2 also includes a pre-charging circuit 23. The first end of the pre-charging circuit 23 is connected to the battery 1, and the second end of the pre-charging circuit 23 is used to connect to an external device.

[0093] The switch module 20 includes a third switch module 203, which is connected to the pre-charging circuit 23. The third switch module 203 includes at least two third switch elements connected in parallel, each of which can connect the battery 1 and an external device.

[0094] Understandably, the pre-charging circuit 23 connects battery 1 to an external device, enabling battery 1 to be pre-charged. A third switch module 203 is installed at the pre-charging circuit 23. This third switch module 203 can keep the pre-charging circuit 23 connected or disconnected. The third switch module 203 includes at least two parallel third switch elements. When any one of these third switch elements is closed, the third switch module 203 can connect battery 1 to the external device. Therefore, each switch element 210 can connect battery 1 to the external device, effectively preventing the battery system from failing to pre-charge due to the failure of a single third switch element. This ensures that the pre-charging circuit 23 can stably connect battery 1 to the external device, and different third switch elements can work in turn, avoiding a shortened lifespan of the switch elements 210 due to high-frequency opening and closing, thus improving the safety redundancy of the battery system.

[0095] In some embodiments, such as Figure 2 As shown, the BDU module 2 also includes a main positive circuit 24 and a main negative circuit 25. The first end of the main positive circuit 24 is connected to the positive terminal of the battery 1, and the second end of the main positive circuit 24 is used to connect to the positive terminal of an external device. The first end of the main negative circuit 25 is connected to the negative terminal of the battery 1, and the second end of the main negative circuit 25 is used to connect to the negative terminal of an external device. At least one of the main positive circuit 24 and the main negative circuit 25 is connected to a switch module 20.

[0096] Understandably, the switch module 20 allows the positive circuit 24 or the negative circuit 25 to switch between connected and disconnected states. Since the switch module 20 includes at least two parallel switching elements 210, the switch module 20 can connect the battery 1 and the external device when any one of the switching elements 210 is in the closed state. Therefore, each switching element 210 can connect the battery 1 and the external device, effectively preventing the battery system from malfunctioning due to the failure of a certain switching element 210. This ensures that the positive circuit 24 and the negative circuit 25 can stably connect the battery 1 and the external device. Furthermore, different switching elements 210 can work in turn, avoiding a shortened lifespan of the switching elements 210 due to high-frequency opening and closing, and improving the safety redundancy of the battery system.

[0097] According to an embodiment of the second aspect of this application, the energy storage device includes the battery system described above.

[0098] According to the energy storage device of this application embodiment, when the switch module 20 connects the battery 1 and the external device, the battery 1 pack is discharged or charged. The switch module 20 includes at least two parallel switching elements 210, each of which can be used to connect the battery 1 and the external device, enabling the battery system to operate normally. Furthermore, different switching elements 210 can be closed alternately, effectively increasing the service life of the switch module 20. Simultaneously, when one switching element 210 fails, the battery 1 and the external device can still be connected through the other switching elements 210, ensuring stable operation of the battery system and improving the safety redundancy of the battery system and the energy storage device.

[0099] It should be noted that energy storage devices can include energy storage power supplies, medical devices, smart cities, etc. It is also important to note that the above are merely illustrative examples of energy storage devices and do not impose any specific limitations on them.

[0100] According to the embodiments of the third aspect of this application, such as Figure 6 As shown, the control methods include:

[0101] Step 101: In response to different power-on commands, control different switching elements 210 to close in turn.

[0102] Understandably, after receiving a power-on command, the battery system needs to connect battery 1 to the external device, which in turn requires the switch module 20 to connect battery 1 to the external device. When the battery system receives a power-off command, all switching units of the switch module 20 will be in the open state to ensure that the battery system can be successfully disconnected. In other words, each time a power-on command is received, at least one switching element 210 needs to be closed.

[0103] This embodiment controls different switching elements 210 to close in turn, reducing the number of switching elements 210 responding to the same power-on command. This effectively reduces the number of times a single switching element 210 is opened and closed, increases the service life of the switching element 210, and avoids the situation where the service life of a certain switching element 210 is lower than that of other switching elements 210 due to excessive opening and closing frequency. This prevents the premature damage of a certain switching element 210 and ensures the safety redundancy of the battery system.

[0104] In some embodiments, the step of controlling different switching elements 210 to close in turn in response to different power-on commands includes:

[0105] Upon receiving the current power-on command, the target switch element 210 is controlled to close. The target switch element 210 is the switch element 210 that did not close after receiving the previous power-on command.

[0106] Understandably, the switch element 210 that did not close after receiving the previous power-on command is set as the target switch element 210. After receiving the current power-on command, the target switch element 210 is controlled to close, thereby reducing the number of times the same switch element 210 is opened and closed, increasing the service life of the switch element 210, avoiding the situation where the service life of a certain switch element 210 is lower than that of other switch elements 210 due to excessive opening and closing frequency, preventing the premature damage of a certain switch element 210, and ensuring the safety redundancy of the battery system.

[0107] For example, suppose the switch module 20 includes switch element A 210 and switch element B 210. After receiving the current power-on command, it first determines whether switch element A 210 was closed during the last power-on. If so, switch element B 210 is determined as the target switch element 210. If not, switch element A 210 is determined as the target switch element 210.

[0108] In some embodiments, after the step of controlling the target switching element 210 to close, the method further includes:

[0109] If the target switching element 210 is not closed, then at least one of the other switching elements 210 is controlled to be in the closed state.

[0110] Understandably, if the target switching element 210 fails to close successfully, it indicates a malfunction in the target switching element 210. Therefore, at least one of the other switching elements 210 is controlled to close, ensuring the battery system functions normally. Simultaneously, an alarm message can be sent to the user to alert them to the malfunction of the switching element 210.

[0111] In some examples, if other switching elements 210 fail to close, power is stopped and a fault error message is issued.

[0112] According to the embodiments of the fourth aspect of this application, such as Figure 7 As shown, the electronic device may include: a processor 310, a communication interface 320, a memory 330, and a communication bus 340, wherein the processor 310, the communication interface 320, and the memory 330 communicate with each other through the communication bus 340. The processor 310 can call logical instructions in the memory 330 to execute a control method, which includes:

[0113] In response to different power-on commands, different switching elements 210 are controlled to close in turn.

[0114] Furthermore, the logical instructions in the aforementioned memory 330 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0115] On the other hand, this application also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer is able to perform the control methods provided by the above-described methods. The method includes:

[0116] In response to different power-on commands, different switching elements 210 are controlled to close in turn.

[0117] According to an embodiment of the sixth aspect of this application, the application further includes a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the control methods provided above, the method comprising:

[0118] In response to different power-on commands, different switching elements 210 are controlled to close in turn.

[0119] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0120] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0121] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery system characterized by, include: Battery; The BDU module includes a switch module, a first terminal of which is connected to the battery, and a second terminal of which is used to connect to an external device; wherein... The switching module includes at least two switching elements connected in parallel, each of which can switch between a closed state and an open state, so that each of the switching elements can connect the battery and the external device.

2. The battery system of claim 1, wherein, When the second end of the switch module is connected to the external device, one of the switch elements is in the closed state, and the other switch elements are in the open state.

3. The battery system of claim 1, wherein, The battery system also includes a control module connected to the switch module. The control module is used to control the switch module so that different switch elements are in a closed state in turn.

4. The battery system according to any one of claims 1 to 3, characterized by, The BDU module also includes a discharge circuit, the first end of which is connected to the battery, and the second end of which is used to connect to the external device. The switching module includes a first switching module connected to the discharge circuit. The first switching module includes at least two first switching elements connected in parallel, and each of the first switching elements can be used to connect the battery and the external device.

5. The battery system of claim 4, wherein, The discharge circuit includes a positive discharge circuit and a negative discharge circuit. The positive discharge circuit is used to connect the positive terminal of the battery and the positive terminal of the external device, and the negative discharge circuit is used to connect the negative terminal of the battery and the negative terminal of the external device. At least one of the positive discharge circuit and the negative discharge circuit is provided with the first switch module.

6. The battery system of claim 4, wherein, The BDU module includes at least two discharge circuits, which are connected in parallel.

7. The battery system according to any one of claims 1 to 3, characterized by The BDU module also includes a charging circuit, the first end of which is connected to the battery, and the second end of which is used to connect to the external device. The switching module includes a second switching module connected to the charging circuit. The second switching module includes at least two second switching elements connected in parallel, and each second switching element can be used to connect the battery and the external device.

8. The battery system of claim 7, wherein, The charging circuit includes a positive charging circuit and a negative charging circuit. The positive charging circuit is used to connect the positive terminal of the battery to the positive terminal of the external device, and the negative charging circuit is used to connect the negative terminal of the battery to the negative terminal of the external device. At least one of the positive charging circuit and the negative charging circuit is provided with the second switching module.

9. The battery system of claim 7, wherein, The BDU module includes at least two charging circuits, which are connected in parallel.

10. The battery system according to any one of claims 1 to 3, characterized by, The BDU module also includes a pre-charging circuit, the first end of which is connected to the battery, and the second end of which is used to connect to the external device. The switching module includes a third switching module connected to the pre-charging circuit. The third switching module includes at least two third switching elements connected in parallel, and each of the third switching elements can connect the battery and the external device.

11. The battery system according to any one of claims 1 to 3, characterized in that, The BDU module further includes a main positive circuit and a main negative circuit. The first end of the main positive circuit is connected to the positive terminal of the battery, and the second end of the main positive circuit is used to connect to the positive terminal of the external device. The first end of the main negative circuit is connected to the negative terminal of the battery, and the second end of the main negative circuit is used to connect to the negative terminal of the external device. At least one of the main positive circuit and the main negative circuit is connected to the switch module.

12. An energy storage device, characterized by, Includes the battery system as described in any one of claims 1 to 11.

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