Battery circuit, battery system and vehicle

Abstract

The invention relates to a battery circuit, a battery system and a vehicle. The battery circuit comprises a first battery module, a second battery module, a first switch unit and a second switch unit, wherein the first switch unit has a first closed state and a second closed state; the second switch unit has a third closed state and a fourth closed state; when the first switch unit is in a first closed state and the second switch unit is in a third closed state, the first battery module and the second battery module are connected in parallel; when the first switch unit is in a second closed state and the second switch unit is in a fourth closed state, the first battery module and the second battery module are connected in series. According to the battery circuit, the battery modules can be easily switched between parallel connection and series connection by changing the state of the switch unit, different load requirements are met, and efficient and reliable energy supply is achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a battery circuit, a battery system and a vehicle. Background Art

[0002] With the rapid development of the new energy electric vehicle market, the performance requirements for power battery packs are constantly increasing, especially fast charging speed and driving range have become key indicators. Currently, there are various specifications of charging piles on the market, and electric vehicles need to have good adaptability to be compatible with different charging facilities. While ensuring charging efficiency, electric vehicles also need to take into account the safety of the charging process.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] An object of the present disclosure is to provide a battery circuit, a battery system and a vehicle.

[0005] According to a first aspect of an embodiment of the present disclosure, a battery circuit is provided, comprising: a first battery module, a second battery module, a first switch unit and a second switch unit; wherein the first switch unit has a first closed state and a second closed state; the second switch unit has a third closed state and a fourth closed state; when the first switch unit is in the first closed state and the second switch unit is in the third closed state, the first battery module and the second battery module are connected in parallel; when the first switch unit is in the second closed state and the second switch unit is in the fourth closed state, the first battery module and the second battery module are connected in series.

[0006] In some embodiments, the battery circuit also includes a first electrode lead-out terminal and a second electrode lead-out terminal; the first switch unit includes a first fixed end, a first contact end, and a second contact end; wherein the first fixed end is connected to the first electrode of the first battery module; the first contact end is connected to the first electrode lead-out terminal; the second switch unit includes a second fixed end, a third contact end, and a fourth contact end; wherein the second fixed end is connected to the second electrode of the second battery module; the third contact end is connected to the second electrode lead-out terminal; and the second contact end is connected to the fourth contact end.

[0007] In some embodiments, when the first switch unit is in a first closed state, the first fixed end is electrically connected to the first contact end; when the first switch unit is in a second closed state, the first fixed end is electrically connected to the second contact end; when the second switch unit is in a third closed state, the second fixed end is electrically connected to the third contact end; when the second switch unit is in a fourth closed state, the second fixed end is electrically connected to the fourth contact end.

[0008] In some embodiments, the initial states of the first switch unit and the second switch unit are both disconnected; the battery circuit further includes an inverter electrically connected between the first switch unit and the second switch unit.

[0009] In some embodiments, the battery circuit also includes a controller; the controller is used to: receive a high-voltage power-on instruction, and based on the high-voltage power-on instruction, perform a closed state stuck detection on the first switch unit and the second switch unit to obtain a detection result; generate a battery working instruction according to the acquired target voltage output mode and the detection result; wherein the battery working instruction includes a series output instruction and a parallel output instruction; the series output instruction is used to indicate that the first switch unit is in a first closed state and the second switch unit is in a third closed state; the parallel output instruction is used to indicate that the first switch unit is in a second closed state and the second switch unit is in a fourth closed state.

[0010] In some embodiments, the detection results include at least a no-fault result, a parallel limitation result, and a series limitation result; wherein the no-fault result is: no closed state stuck fault; the parallel limitation result is one of the following: the first switch unit has a first closed state stuck fault and the second switch unit does not have a closed state stuck fault; the second switch unit has a third closed state stuck fault and the first switch unit does not have a closed state stuck fault; the first switch unit has a first closed state stuck fault and the second switch unit has a third closed state stuck fault; the series limitation result is one of the following: the first switch unit has a second closed state stuck fault and the second switch unit does not have a closed state stuck fault; the second switch unit has a fourth closed state stuck fault and the first switch unit does not have a closed state stuck fault; the first switch unit has a second closed state stuck fault and the second switch unit has a fourth closed state stuck fault.

[0011] In some embodiments, the target voltage output mode includes a target parallel mode and a target series mode; the controller is used to: generate the parallel output instruction when the target parallel mode is obtained and the detection result is a fault-free result or a parallel limitation result; the controller is also used to: generate the series output instruction when the target series mode is obtained and the detection result is a fault-free result or a series limitation result.

[0012] In some embodiments, the battery circuit also includes: a first insurance unit and a second insurance unit; the first insurance unit and the second insurance unit cut off the circuit when a preset condition is met; the first insurance unit is electrically connected between the first switching power supply and the first electrode lead-out terminal; the second insurance unit is electrically connected between the second switching unit and the second electrode lead-out terminal.

[0013] In some embodiments, the first electrode lead-out terminal and the second electrode lead-out terminal are connected to a load, and the first battery module and the second battery module are used to supply power to the load; or, the first electrode lead-out terminal and the second electrode lead-out terminal are connected to a charging device, and the charging device is used to charge the first battery module and the second battery module.

[0014] In some embodiments, both the first switch unit and the second switch unit are single-pole double-throw switches.

[0015] According to a second aspect of an embodiment of the present disclosure, a battery system is provided. The battery system includes the battery circuit provided by the first aspect of an embodiment of the present disclosure.

[0016] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, the vehicle comprising the battery circuit provided by the first aspect of an embodiment of the present disclosure.

[0017] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0018] The present invention can easily switch between parallel connection and series connection of battery modules by changing the state of the switch unit, meet different load requirements, and achieve efficient and reliable energy supply. In addition, selecting the appropriate connection method according to the load requirements can also optimize the battery usage efficiency and extend the battery life.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] Figure 1 It is a schematic diagram of a battery circuit in the related art.

[0022] Figure 2 is a schematic diagram of a charging circuit according to some embodiments of the present disclosure.

[0023] Figure 3 is a schematic diagram of yet another charging circuit according to some embodiments of the present disclosure.

[0024] Figure 4 is a schematic diagram showing an inverter electrically connected between switch units according to some embodiments of the present disclosure.

[0025] Figure 5 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] Some embodiments of the present disclosure will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications and equivalents of the methods, devices and / or systems described herein will become apparent after understanding the present disclosure. For example, the order of operations described herein is merely an example and is not limited to those orders set forth herein, but can be changed as becomes apparent after understanding the present disclosure, except for operations that must be performed in a specific order. In addition, for clarity and brevity, descriptions of features known in the art may be omitted.

[0027] The embodiments described in some embodiments of the present disclosure below do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] Figure 1 is a schematic diagram of a battery circuit in the related art, such as Figure 1 As shown, in the related art, K1 and K2 are connected to the high voltage load, S0, S1 and S2 are switch relays, and the whole package has multiple working modes:

[0029] (1) Battery module 1 and battery module 2 are connected in series for charging and discharging, and only the S0 relay is closed.

[0030] (2) Battery module 1 and battery module 2 are charged and discharged in parallel, and only the S1 or S2 relay is closed.

[0031] It can be seen that there is a possibility that S2 and S0 are closed at the same time, which will cause a short circuit problem. In order to avoid internal short circuits in the pack caused by relay control or mechanical problems, a fuse must be connected in series in the S0 circuit. After an internal short circuit caused by S0 adhesion occurs, the high-voltage battery pack is not allowed to control other relays and the short-circuit current will have unpredictable effects on the battery cell itself.

[0032] It should be noted that in the present disclosure, the terms "first", "second", etc. in the specification, claims and drawings are used to distinguish similar objects, and do not have to be understood as describing a specific order or sequence. For example, the first battery module and the second battery module in the present disclosure are used to distinguish two battery packs. Figures 2 to 3 The first battery module 201 can be replaced by the second battery module 202 , and the second battery module 202 can also be replaced by the first battery module 201 .

[0033] The specific implementation of the embodiment of the present disclosure is described in detail below with reference to the accompanying drawings.

[0034] Figure 2 is a schematic diagram of a charging circuit according to some embodiments of the present disclosure.

[0035] In some embodiments of the present disclosure, the battery circuit may include: a first battery module 201, a second battery module 202, a first switch unit D1 and a second switch unit D2, wherein the first switch unit D1 has a first closed state and a second closed state, and the second switch unit D2 has a third closed state and a fourth closed state.

[0036] When the first switch unit D1 is in the first closed state and the second switch unit D2 is in the third closed state, the circuit connection is as follows: Figure 2 As shown in (a) in FIG. 1 , at this time, the first battery module 201 and the second battery module 202 are connected in parallel.

[0037] When the first switch unit D1 is in the second closed state and the second switch unit D2 is in the fourth closed state, the circuit connection is as follows: Figure 2 As shown in (b) in FIG. 1 , at this time, the first battery module 201 and the second battery module 202 are connected in series.

[0038] In an exemplary embodiment, the voltage that the battery circuit can provide when the first battery module 201 and the second battery module 202 are connected in parallel is lower than the voltage that the first battery module 201 and the second battery module 202 can provide when they are connected in series. For example, assuming that the rated voltages of the first battery module 201 and the second battery module 202 are both 400V, the voltage that the circuit can provide after the parallel connection is 400V, and the voltage that the circuit can provide after the series connection will be 800V.

[0039] In an exemplary embodiment, the switch unit can be controlled to be in different closed states according to actual conditions to flexibly switch the connection mode of the battery module to adapt to different load scenarios.

[0040] Taking an electric car as an example, it is assumed that the electric car is equipped with the battery circuit provided by the embodiment of the present disclosure, and the rated voltages of the first battery module and the second battery module are both 400V. When the electric car needs to be connected to a charging pile of 400V specification, the first switch unit can be controlled to be in the first closed state, and the second switch unit can be controlled to be in the third closed state, so that the first battery module and the second battery module are connected in parallel, so as to adapt to the 400V charging pile demand. When the electric car needs to be connected to a charging pile of 800V specification, the first switch unit can be controlled to be in the second closed state, and the second switch unit can be controlled to be in the fourth closed state, so that the first battery module and the second battery module are connected in series, so as to adapt to the 800V charging pile and meet the charging demand of higher voltage. It can be seen that this flexible connection method not only improves the charging compatibility of electric vehicles, but also optimizes the use efficiency of batteries.

[0041] It can be seen from the above steps that the battery circuit provided by the present disclosure can easily switch between parallel connection and series connection of battery modules by changing the state of the switch unit, meet different load requirements, and achieve efficient and reliable energy supply. In addition, by selecting a suitable connection method according to load requirements, the battery efficiency can be optimized and the battery life can be extended.

[0042] In some embodiments of the present disclosure, both the first switch unit and the second switch unit are single-pole double-throw switches.

[0043] Among them, the single-pole double-throw switch has different static contacts (also called "throws" or "positions") and can have different conduction states, and different conduction states can put the switch unit in different closed states.

[0044] The following description will be made by taking the example that both the first switch unit and the second switch unit are single-pole double-throw switches, but the present disclosure does not limit the type of the switch unit.

[0045] Figure 3 is a schematic diagram of yet another charging circuit according to some embodiments of the present disclosure.

[0046] like Figure 3As shown, in some embodiments of the present disclosure, the battery circuit also includes a first electrode lead-out terminal 301 and a second electrode lead-out terminal 302; the first switch unit D1 includes a first fixed end 303, a first contact terminal P11 and a second contact terminal P12; wherein the first fixed end 303 is connected to the first electrode of the first battery module 201; the first contact terminal P11 is connected to the first electrode lead-out terminal 301; the second switch unit D2 includes a second fixed end 304, a third contact terminal P21 and a fourth contact terminal P22; wherein the second fixed end 304 is connected to the second electrode of the second battery module 202; the third contact terminal P21 is connected to the second electrode lead-out terminal 302; the second contact terminal P12 is connected to the fourth contact terminal P22.

[0047] In the embodiment of the present disclosure, it is assumed that the first electrode is a negative electrode and the second electrode is a positive electrode for illustration, but the present disclosure is not limited thereto.

[0048] refer to Figure 3 In some embodiments of the present disclosure, when the first switch unit D1 is in a first closed state, the first fixed end 303 is electrically connected to the first contact end P11; when the first switch unit D1 is in a second closed state, the first fixed end 303 is electrically connected to the second contact end P12; when the second switch unit D2 is in a third closed state, the second fixed end 304 is electrically connected to the third contact end P21; when the second switch unit D2 is in a fourth closed state, the second fixed end 304 is electrically connected to the fourth contact end P22.

[0049] Through Figure 3 The battery circuit shown can utilize the characteristics of a single-pole double-throw switch and control the single-pole double-throw switch to close at different contact ends to achieve different closing states of the switch unit.

[0050] Specifically, when the first fixed end 303 is electrically connected to the first contact end P11, and the second fixed end 304 is electrically connected to the third contact end P21, it can be achieved that "the first switch unit is in the first closed state and the second switch unit is in the third closed state". At this time, the first battery module 201 and the second battery module 202 in the battery circuit can be connected in parallel.

[0051] When the first fixed end 303 is electrically connected to the second contact end P12, and the second fixed end 304 is electrically connected to the fourth contact end P22, it can be achieved that "the first switch unit is in the second closed state and the second switch unit is in the fourth closed state". At this time, the first battery module 201 and the second battery module 202 in the battery circuit can be connected in series.

[0052] In addition, when the first fixed end 303 is electrically connected to the first contact terminal P11 and the second fixed end 304 is electrically connected to the fourth contact terminal P22, or when the first fixed end 303 is electrically connected to the second contact terminal P12 and the second fixed end 304 is electrically connected to the third contact terminal P21, although the series connection or parallel connection of the battery modules cannot be achieved, it will not cause internal short circuit problems, thereby protecting the safety of the battery and the circuit.

[0053] The battery circuit provided by the embodiment of the present disclosure can meet the parallel and series switching requirements of the battery module while ensuring that the battery circuit will not have a short circuit problem, thereby ensuring the safety and reliability of the battery circuit and realizing an efficient, safe and flexible battery circuit configuration method.

[0054] In an exemplary embodiment, Figure 3 The battery module 200 may further include a first ammeter A1 and a second ammeter A2. The first ammeter A1 may be used to measure the current of the first battery module 201 when the battery modules are connected in parallel, and the second ammeter A2 may be used to measure the current of the second battery module 202 when the battery modules are connected in parallel.

[0055] In some embodiments of the present disclosure, the battery circuit also includes: a first insurance unit and a second insurance unit; the first insurance unit and the second insurance unit cut off the circuit when a preset condition is met; the first insurance unit is electrically connected between the first switching power supply and the first electrode lead-out terminal; the second insurance unit is electrically connected between the second switching unit and the second electrode lead-out terminal.

[0056] In the disclosed embodiment, the insurance unit may be a fuse, a circuit breaker, a thermal relay, etc. The insurance unit can cut off the circuit when the current is abnormal, thereby preventing equipment damage or even fire, and can be used to protect the circuit from damage caused by faults such as overload and short circuit.

[0057] The preset condition may be set according to the specific form of the insurance unit. For example, if the insurance unit is a fuse, the preset condition may be that the temperature is higher than a preset temperature.

[0058] refer to Figure 3 , Figure 3 The device also includes a first insurance unit 305 and a second insurance unit 306 (here, a fuse is assumed to be used as an example, but the present disclosure is not limited to this). The first insurance unit 305 can be electrically connected between the first contact terminal P11 and the second electrode lead-out terminal 302, and the second insurance unit 306 can be electrically connected between the third contact terminal P21 and the first electrode lead-out terminal 301.

[0059] In some embodiments of the present disclosure, the first electrode lead-out terminal and the second electrode lead-out terminal are connected to a load, and the first battery module and the second battery module are used to supply power to the load; or, the first electrode lead-out terminal and the second electrode lead-out terminal are connected to a charging device, and the charging device is used to charge the first battery module and the second battery module.

[0060] In the embodiment of the present disclosure, the battery circuit has a power supply mode. In the power supply mode, the first electrode lead end and the second electrode lead end are connected to the load, and the first battery module and the second battery module can be used as a power source to supply power to the load. The power supply mode is widely used in various occasions requiring battery power supply, such as electric vehicles, mobile devices, backup power systems, etc.

[0061] The battery circuit also has a charging mode. In the charging mode, the first electrode lead end and the second electrode lead end are connected to a charging device, indicating that the battery circuit is now in a charging state and can receive power from the charging device. The charging device may be, for example, a charging station, a charging pile, or the like.

[0062] In some embodiments of the present disclosure, the initial states of the first switch unit and the second switch unit are both disconnected; the battery circuit further includes an inverter electrically connected between the first switch unit and the second switch unit.

[0063] In the embodiment of the present disclosure, the first switch unit and the second switch unit may be single-pole double-throw switches whose default positions are disconnected.

[0064] In an exemplary embodiment, the closing of the first switch unit D1 and the second switch unit D2 (i.e., the conduction between the fixed end and the contact end of each switch unit) can be controlled by controlling the voltage. In a battery circuit design configured with an inverter, when the control voltage is released, the closing timing of the first switch unit D1 and the second switch unit D2 can be staggered. This design feature ensures that the two single-pole double-throw switches will not change from the open state to the closed state at the same time, thereby effectively avoiding the voltage shock and internal circuit short circuit risks that may be caused by simultaneous closure. The introduction of the inverter provides a strong guarantee for the safety and stability of the circuit.

[0065] Figure 4 FIG. 1 is a schematic diagram showing an inverter electrically connected between switch units according to some embodiments of the present disclosure. Figure 4 As shown, an inverter 401 , a first resistor R1 , and a second resistor R2 may be sequentially disposed between the first switch unit D1 and the second switch unit D2 .

[0066] In the embodiment of the present disclosure, after the control voltage Vctrl is released, the reaction of the first switch unit D1 is slower than that of the second switch unit D2 , thereby avoiding the simultaneous closing of the switches.

[0067] In some embodiments of the present disclosure, the battery circuit also includes a controller; the controller is used to: receive a high-voltage power-on instruction, and based on the high-voltage power-on instruction, perform a closed state stuck detection on the first switch unit and the second switch unit to obtain a detection result; generate a battery working instruction according to the acquired target voltage output mode and the detection result; wherein the battery working instruction includes a series output instruction and a parallel output instruction; the series output instruction is used to indicate that the first switch unit is in a first closed state and the second switch unit is in a third closed state; the parallel output instruction is used to indicate that the first switch unit is in a second closed state and the second switch unit is in a fourth closed state.

[0068] In the embodiment of the present disclosure, the controller ( Figure 3 The controller (not shown) can receive a high voltage power-on instruction from an external system or a user. In response to receiving the high voltage power-on instruction, the controller can perform a closed state stuck detection of the first switch unit and the second switch unit. In this way, before the battery circuit starts to work, it can be determined whether all the switch units are in a normal working state, thereby avoiding circuit abnormalities caused by switch unit failures.

[0069] After determining the detection result, the controller can intelligently generate battery operation instructions based on the closed state stuck detection result and the target voltage output mode required by the system. These instructions can include series output instructions and parallel output instructions, which are used to guide the switch unit to achieve different closed states to meet the different requirements of the system for battery output.

[0070] Through the embodiments of the present disclosure, a controller can be used to detect the closed state of the switch before high voltage power is applied. The closed state stuck detection function can promptly discover and handle the stuck problem of the switch unit, avoiding safety hazards such as circuit short circuit and overcurrent caused by switch failure, and realizing intelligent management of the battery circuit and safe and efficient output.

[0071] In some embodiments of the present disclosure, the detection results include at least a no-fault result, a parallel limitation result, and a series limitation result; wherein the no-fault result is: no closed state stuck fault; the parallel limitation result is one of the following: the first switch unit has a first closed state stuck fault and the second switch unit does not have a closed state stuck fault; the second switch unit has a third closed state stuck fault and the first switch unit does not have a closed state stuck fault; the first switch unit has a first closed state stuck fault and the second switch unit has a third closed state stuck fault; the series limitation result is one of the following: the first switch unit has a second closed state stuck fault and the second switch unit does not have a closed state stuck fault; the second switch unit has a fourth closed state stuck fault and the first switch unit does not have a closed state stuck fault; the first switch unit has a second closed state stuck fault and the second switch unit has a fourth closed state stuck fault.

[0072] In the disclosed embodiment, there is no closed state stuck fault, that is, the first switch unit and the second switch unit can be switched to different closed states. There is a stuck fault in a certain closed state, that is, only the closed state can be maintained and cannot be switched to other closed states.

[0073] refer to Figure 3 , there is no closed state stuck fault, that is: there is no contact stuck between the first fixed end 303 and the first contact end P11, the second contact end P12, and there is no contact stuck between the second fixed end 304 and the third contact end P21, the fourth contact end P22.

[0074] refer to Figure 3 , (1) the first switch unit has a stuck fault in the first closed state and the second switch unit does not have a stuck fault in the closed state, that is: the first fixed end 303 and the first contact end P11 are stuck (that is, the first fixed end 303 can only be electrically connected to the first contact end P11 and can no longer be electrically connected to the second contact end P12), and the second switch unit D2 does not have contact stuck.

[0075] (2) The second switch unit has a stuck fault in the third closed state and the first switch unit does not have a stuck fault in the closed state, that is, there is a stuck state between the second fixed end 304 and the third contact end P21, and there is no contact stuck state in the first switch unit D1.

[0076] (3) The first switch unit has a stuck fault in the first closed state and the second switch unit has a stuck fault in the third closed state, that is, there is a stuck fault between the first fixed end 303 and the first contact end P11, and there is a contact stuck fault between the second fixed end 304 and the third contact end P21.

[0077] In the above three cases (1) to (3), the battery modules in the battery circuit can only be connected in parallel, so these three cases correspond to parallel restriction results.

[0078] Refer to Figure 3 , (4) The first switch unit has a stuck fault in the second closed state and the second switch unit does not have a stuck fault in the closed state, that is: there is a stuck state between the first fixed end 303 and the second contact end P12, and there is no contact stuck state in the second switch unit D2.

[0079] (5) The second switch unit has a stuck fault in the fourth closed state and the first switch unit does not have a stuck fault in the closed state, that is, there is a stuck state between the second fixed end 304 and the fourth contact end P22, and there is no contact stuck state in the first switch unit D1.

[0080] (6) The first switch unit has a stuck fault in the second closed state and the second switch unit has a stuck fault in the fourth closed state, that is: there is a stuck fault between the first fixed end 303 and the second contact end P12, and there is a stuck fault between the second fixed end 304 and the fourth contact end P22.

[0081] In the above three cases (4) to (6), the battery modules in the battery circuit can only be connected in series, so these three cases correspond to series restriction results.

[0082] In addition, when other results are detected (including: (7) the first closed state stuck fault and the fourth closed state stuck fault exist at the same time, (8) the second closed state stuck fault and the third closed state stuck fault exist at the same time), since the first battery module and the second battery module cannot be connected in series or in parallel, the failure information that the battery cannot work can be reported. A failure reminder can also be sent to the terminal in time to instruct the user to make repairs.

[0083] Continue to refer Figure 3 , Figure 3 The third switch 307 and the fourth switch 308 are also included, the third switch 307 can be electrically connected to the first electrode lead-out terminal 301, and the fourth switch 308 can be electrically connected to the second electrode lead-out terminal 302. When it is determined to generate a battery working instruction, an instruction to control the third switch 307 and the fourth switch 308 to be closed can be generated to put the entire battery circuit into a working state.

[0084] In some embodiments of the present disclosure, the target voltage output mode includes a target parallel mode and a target series mode; the controller is used to: generate the parallel output instruction when the target parallel mode is acquired and the detection result is a fault-free result or a parallel limitation result; the controller is also used to: generate the series output instruction when the target series mode is acquired and the detection result is a fault-free result or a series limitation result.

[0085] In the disclosed embodiment, the intelligent processing logic of the controller can be used to achieve accurate and safe control of the target parallel mode and the target series mode, thereby improving the output efficiency and safety of the battery circuit.

[0086] It should be noted that the above figures are only schematic illustrations of the processes included in the methods according to some embodiments of the present disclosure, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0087] The present disclosure also provides a battery system, which includes the battery circuit provided above.

[0088] Figure 5 is a block diagram of a vehicle 500 according to an exemplary embodiment. For example, the vehicle 500 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 500 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0089] Reference Figure 5 , the vehicle 500 may include various subsystems, for example, an infotainment system 510, a perception system 520, a decision control system 530, a drive system 540, and a computing platform 550. The vehicle 500 may also include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 500 may be interconnected by wire or wireless means.

[0090] In some embodiments, the infotainment system 510 may include a communication system, an entertainment system, and a navigation system, among others.

[0091] The perception system 520 may include several sensors for sensing information about the environment around the vehicle 500. For example, the perception system 520 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0092] The decision control system 530 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0093] The drive system 540 may include components that provide powered motion for the vehicle 500. In one embodiment, the drive system 540 may include an engine, an energy source, a transmission system, and wheels. The engine may be an internal combustion engine, an electric motor, an air compression engine, or a combination of one or more thereof. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0094] Some or all functions of the vehicle 500 are controlled by a computing platform 550. The computing platform 550 may include at least one processor 551 and a memory 552, and the processor 551 may execute instructions 553 stored in the memory 552.

[0095] The processor 551 may be any conventional processor, such as a commercially available CPU. The processor may also include a graphics processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0096] The memory 552 may be implemented by any type of volatile or nonvolatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0097] In addition to instructions 553 , memory 552 may also store data, such as road maps, route information, vehicle location, direction, speed, etc. The data stored in memory 552 may be used by computing platform 550 .

[0098] In the embodiment of the present disclosure, the processor 551 may execute instruction 553 to complete all or part of the above steps of performing the closed state stuck detection.

[0099] In addition, the word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described as "exemplary" in this article is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a specific way. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0100] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art after reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although the specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and conducive to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in the specific embodiments or claims, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0101] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0102] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery circuit, characterized in that: include: A first battery module, a second battery module, a first switch unit and a second switch unit; Wherein, the first switch unit has a first closed state and a second closed state; the second switch unit has a third closed state and a fourth closed state; When the first switch unit is in a first closed state and the second switch unit is in a third closed state, the first battery module and the second battery module are connected in parallel; When the first switch unit is in the second closed state and the second switch unit is in the fourth closed state, the first battery module and the second battery module are connected in series.

2. The battery circuit according to claim 1, characterized in that: The battery circuit also includes a first electrode lead-out terminal and a second electrode lead-out terminal; The first switch unit includes a first fixed end, a first contact end and a second contact end; wherein the first fixed end is connected to the first electrode of the first battery module; the first contact end is connected to the first electrode lead-out end; The second switch unit includes a second fixed end, a third contact end and a fourth contact end; wherein the second fixed end is connected to the second electrode of the second battery module; the third contact end is connected to the second electrode lead-out end; and the second contact end is connected to the fourth contact end.

3. The battery circuit according to claim 2, characterized in that: When the first switch unit is in a first closed state, the first fixed end is electrically connected to the first contact end; When the first switch unit is in a second closed state, the first fixed end is electrically connected to the second contact end; When the second switch unit is in a third closed state, the second fixed end is electrically connected to the third contact end; When the second switch unit is in a fourth closed state, the second fixed end is electrically connected to the fourth contact end.

4. The battery circuit according to claim 1, characterized in that: The initial states of the first switch unit and the second switch unit are both disconnected; The battery circuit further includes an inverter electrically connected between the first switch unit and the second switch unit.

5. The battery circuit according to claim 1, characterized in that: The battery circuit further includes a controller; the controller is used for: receiving a high-voltage power-on instruction, and performing a closed state stuck detection on the first switch unit and the second switch unit based on the high-voltage power-on instruction to obtain a detection result; Generate a battery working instruction according to the acquired target voltage output mode and the detection result; Among them, the battery working instructions include series output instructions and parallel output instructions; the series output instructions are used to indicate that the first switch unit is in a first closed state and the second switch unit is in a third closed state; the parallel output instructions are used to indicate that the first switch unit is in a second closed state and the second switch unit is in a fourth closed state.

6. The battery circuit according to claim 5, characterized in that: The detection results at least include a no-fault result, a parallel limit result and a series limit result; wherein, The no-fault result is: no closed state stuck fault; The parallel restriction result is one of the following: the first switch unit has a stuck fault in the first closed state and the second switch unit does not have a stuck fault in the closed state; the second switch unit has a stuck fault in the third closed state and the first switch unit does not have a stuck fault in the closed state; the first switch unit has a stuck fault in the first closed state and the second switch unit has a stuck fault in the third closed state; The series limitation result is one of the following: the first switch unit has a stuck fault in the second closed state and the second switch unit does not have a stuck fault in the closed state; the second switch unit has a stuck fault in the fourth closed state and the first switch unit does not have a stuck fault in the closed state; the first switch unit has a stuck fault in the second closed state and the second switch unit has a stuck fault in the fourth closed state.

7. The battery circuit according to claim 6, characterized in that: The target voltage output mode includes a target parallel mode and a target series mode; The controller is used to: generate the parallel output instruction when the target parallel mode is acquired and the detection result is a no-fault result or a parallel limit result; The controller is further configured to generate the series connection output instruction when the target series connection mode is acquired and the detection result is a no-fault result or a series connection limitation result.

8. The battery circuit according to claim 2, characterized in that: The battery circuit further comprises: a first insurance unit and a second insurance unit; the first insurance unit and the second insurance unit cut off the circuit when a preset condition is met; The first insurance unit is electrically connected between the first switch unit and the first electrode lead-out terminal; The second insurance unit is electrically connected between the second switch unit and the second electrode lead-out terminal.

9. The battery circuit according to claim 2, characterized in that: The first electrode lead-out terminal and the second electrode lead-out terminal are connected to a load, and the first battery module and the second battery module are used to supply power to the load; or, The first electrode lead-out terminal and the second electrode lead-out terminal are connected to a charging device, and the charging device is used to charge the first battery module and the second battery module.

10. The battery circuit according to any one of claims 1 to 9, characterized in that: The first switch unit and the second switch unit are both single-pole double-throw switches.

11. A battery system, characterized in that: The battery system comprises the battery circuit according to any one of claims 1 to 9.

12. A vehicle, characterized in that: The vehicle comprises the battery circuit according to any one of claims 1 to 9.

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