Battery circuit control device and electric vehicle

Abstract

The application discloses a battery loop control device and belongs to the technical field of batteries. The battery loop control device comprises a processing module, a driving module, a high-voltage loop module and a power module. The processing module is electrically connected with the driving module, the high-voltage loop module is electrically connected with the driving module, and the power module is electrically connected with the driving module. The power module is used for providing electric energy for the driving module. The processing module is used for controlling the driving module to drive the high-voltage loop module, so that the high-voltage loop module is disconnected. In the embodiment of the application, the high-voltage loop module can be disconnected more reliably in the battery loop control device, and the risk and safety problems caused by the failure to disconnect the high-voltage loop module can be avoided.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery circuit control device and an electric vehicle. Background Technology

[0002] With the continuous development of electric vehicles, in order to improve the energy conversion efficiency of electric vehicles, the voltage platform of electric vehicles is also getting higher and higher, and the resulting high voltage safety issues are particularly prominent. Since the safe voltage of electric vehicles is much higher than the safe voltage of the human body (60V), it is necessary to disconnect the battery system from the external connection in some application scenarios.

[0003] Currently, the solution for disconnecting the battery system from external connections is to use controllable switching devices (such as relays, contactors, IGBTs, silicon carbide, etc.) in the high-voltage circuit as devices to control the on / off state of the high voltage under normal circumstances, while inserting a fuse in series in the high-voltage circuit as a device to disconnect the high-voltage circuit in emergency situations.

[0004] However, under certain abnormally high current operating conditions, the aforementioned controllable switching components may experience arcing when the circuit current is large and the circuit is rapidly disconnected. This operating mode can cause the controllable switching components to become damaged and stuck, resulting in a situation where the circuit's high-voltage output is uncontrolled and continues to output to the outside, posing a high-voltage safety contact risk to the personnel in the vehicle. Summary of the Invention

[0005] The purpose of this application is to provide a battery circuit control device and an electric vehicle, at least to solve the problem that uncontrolled high-voltage output and continuous external output can pose a high-voltage safety contact risk to the occupants of the vehicle.

[0006] In a first aspect, embodiments of this application provide a battery circuit control device, which includes: a processing module, a drive module, a high-voltage circuit module, and a power supply module;

[0007] The processing module is electrically connected to the drive module, the high-voltage circuit module is electrically connected to the drive module, and the power supply module is electrically connected to the drive module. The power supply module is used to provide power to the drive module.

[0008] The processing module is used to control the drive module to drive the high-voltage circuit module so as to disconnect the high-voltage circuit module.

[0009] Optionally, the high-voltage circuit module includes a switching unit, a current detection unit, a high-voltage circuit load, and a battery unit. The battery unit is electrically connected to the current detection unit, the current detection unit is electrically connected to the switching unit, the switching unit is electrically connected to the high-voltage circuit load, the current detection unit is electrically connected to the processing module, and the switching unit is electrically connected to the drive module.

[0010] The current detection unit is used to detect the current of the battery cell, and when the current is greater than a first preset current value, it sends a first signal to the processing module. The processing module is used to receive the first signal and control the driving module to drive the switching unit to switch from the on state to the off state, so that the battery cell stops supplying power to the high-voltage circuit load.

[0011] Optionally, the current detection unit includes a first current detection element and a second current detection element, and the battery unit includes a positive terminal connection and a negative terminal connection;

[0012] The first current sensing element is electrically connected to the positive terminal and to the switching unit, and the second current sensing element is electrically connected to the switching unit or the high-voltage circuit load.

[0013] Both the first current detection device and the second current detection device are electrically connected to the processing module. The first current detection device is used to detect the current at the positive terminal, and the second current detection device is used to detect the current at the negative terminal.

[0014] Optionally, the switching unit includes a first switching element and an active safety element;

[0015] The first switching element is electrically connected to the active fuse, and the first switching element is electrically connected to the first current detection element. The active fuse is electrically connected to the high-voltage circuit load, and the high-voltage circuit load is electrically connected to the second current detection element.

[0016] Alternatively, the active fuse is electrically connected to the first current detection element, the active fuse is electrically connected to the high-voltage circuit load, the high-voltage circuit load is electrically connected to the first switch element, and the first switch element is electrically connected to the second current detection element;

[0017] The first switch and the active safety device are both electrically connected to the processing module. The processing module controls the drive module to switch the first switch from a conducting state to a disconnected state, and in the event of a fault in the first switch, switches the active safety device from a conducting state to a disconnected state.

[0018] Optionally, the switching unit includes a first switching element, an active safety element, and a second switching element;

[0019] The first switch is electrically connected to the active fuse and the first current detection element. The active fuse is electrically connected to the high-voltage circuit load. The high-voltage circuit load is electrically connected to the second switch and the second switch is electrically connected to the second current detection element.

[0020] Alternatively, the first switching element is electrically connected to the high-voltage circuit load, and the first switching element is electrically connected to the first current detection element; the high-voltage circuit load is electrically connected to the active fuse; the active fuse is electrically connected to the second switching element; and the second switching element is electrically connected to the second current detection element.

[0021] The first switch, the active safety device, and the second switch are all electrically connected to the processing module. The processing module is used to control the drive module to drive the first switch and / or the second switch to switch from the on state to the off state, and to switch the active safety device from the on state to the off state in the event of a fault in the first switch and the second switch.

[0022] Optionally, the driving module includes a logic conversion module, a first switch driving circuit, a second switch driving circuit, a third switch driving circuit, a fourth switch driving circuit, a first fuse driving circuit, and a second fuse driving circuit.

[0023] The first switch driving circuit, the second switch driving circuit, the third switch driving circuit, the fourth switch driving circuit, the first fuse driving circuit, and the second fuse driving circuit are all electrically connected to the logic conversion module, and the logic conversion module is electrically connected to the processing module.

[0024] The first switch driving circuit and the second switch driving circuit are both electrically connected to the first switch, the third switch driving circuit and the fourth switch driving circuit are both electrically connected to the second switch, and the first fuse driving circuit and the second fuse driving circuit are both electrically connected to the active fuse.

[0025] Optionally, the driving module further includes a signal isolator, wherein the first current detection element and the second current detection element are both electrically connected to the signal isolator, and the signal isolator is electrically connected to the logic conversion module.

[0026] Optionally, the battery circuit control device further includes a power supply unit;

[0027] The first switch driving circuit, the second switch driving circuit, the third switch driving circuit, the fourth switch driving circuit, the first fuse driving circuit, and the second fuse driving circuit are all electrically connected to the power supply unit. The power supply unit is used to provide power to the first switch driving circuit, the second switch driving circuit, the third switch driving circuit, the fourth switch driving circuit, the first fuse driving circuit, and the second fuse driving circuit.

[0028] Optionally, the battery circuit control device further includes a collision detection module, which is electrically connected to the logic conversion module. The collision detection module is used to detect collision signals. When the collision detection module detects a collision signal, the logic conversion module drives the active fuse to switch from a conducting state to a disconnected state through the first fuse drive circuit and / or the second fuse drive circuit.

[0029] Optionally, the drive module further includes a first control switch, a second control switch, and an overcurrent detection unit;

[0030] The logic conversion module is electrically connected to the first fuse drive circuit via the first control switch, and the logic conversion module is electrically connected to the second fuse drive circuit via the second control switch. The first current detection element and the second current detection element are both electrically connected to the overcurrent detection unit. The overcurrent detection unit is electrically connected to the first control switch and the second control switch respectively. The overcurrent detection unit is used to control the first control switch and the second control switch to switch from the on state to the off state when the current is greater than the second preset current value, so that the active fuse element switches from the on state to the off state.

[0031] Optionally, the battery circuit control device further includes an information collection module, which is electrically connected to the processing module. The information collection module is used to collect signals other than those in the high-voltage circuit module, so that the processing module can control the drive module.

[0032] Secondly, embodiments of this application provide an electric vehicle, characterized in that it includes: the battery circuit control device described in any one of the first aspects above.

[0033] In this embodiment, since the processing module is electrically connected to the drive module, the high-voltage circuit module is electrically connected to the drive module, and the power supply module is electrically connected to the drive module, the power supply module can provide power to the drive module, enabling the drive module to operate normally. Furthermore, the processing module can control the drive module to drive the high-voltage circuit module, causing the high-voltage circuit module to disconnect. That is, in this embodiment, disconnecting the high-voltage circuit module in the battery circuit control device is more reliable, avoiding risks and safety issues caused by the inability to disconnect the high-voltage circuit module, and thus preventing the risk of high-voltage safety contact points from large currents affecting vehicle occupants. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of one of the battery circuit control devices provided in an embodiment of this application;

[0035] Figure 2 This is a second schematic diagram illustrating a battery circuit control device provided in an embodiment of this application;

[0036] Figure 3 This is a third schematic diagram illustrating a battery circuit control device provided in an embodiment of this application.

[0037] Figure 4 This is the fourth schematic diagram of a battery circuit control device provided in an embodiment of this application;

[0038] Figure 5 This is the fifth schematic diagram illustrating a battery circuit control device provided in an embodiment of this application;

[0039] Figure 6 This is the sixth schematic diagram of a battery circuit control device provided in the embodiments of this application;

[0040] Figure 7 This diagram illustrates an information collection module provided in an embodiment of this application.

[0041] Figure 8 This is the seventh schematic diagram of a battery circuit control device provided in an embodiment of this application;

[0042] Figure 9 This is the eighth schematic diagram of a battery circuit control device provided in an embodiment of this application;

[0043] Figure 10 This is a schematic diagram illustrating a logic conversion module provided in an embodiment of this application.

[0044] Figure label:

[0045] 10: Processing module; 20: Driver module; 21: Logic conversion module; 22: First switch driver circuit; 23: Second switch driver circuit; 24: Third switch driver circuit; 25: Fourth switch driver circuit; 26: First fuse driver circuit; 27: Second fuse driver circuit; 28: Signal isolator; 201: First control switch; 202: Second control switch; 203: Overcurrent detection unit; 30: High-voltage circuit module; 31: Switching unit; 32: Current detection unit; 33: High-voltage circuit load; 34: Battery unit; 311 312: First switching device; 313: Active fuse; 321: Second switching device; 322: First current detection device; 341: Positive connection terminal; 342: Negative connection terminal; 40: Power supply unit; 41: First power supply; 42: First isolation power supply; 43: Second power supply; 44: Second isolation power supply; 45: Third power supply; 46: Third isolation power supply; 50: Collision detection module; 60: Information collection module; 61: Communication interaction unit; 62: Signal detection unit; 63: Hard wire identification unit. Detailed Implementation

[0046] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] like Figures 1 to 10 As shown, the battery circuit control device includes: a processing module 10, a drive module 20, a high-voltage circuit module 30, and a power supply module 40.

[0050] The processing module 10 is electrically connected to the drive module 20, the high-voltage circuit module 30 is electrically connected to the drive module 20, and the power supply module 40 is electrically connected to the drive module 20. The power supply module 40 is used to provide power to the drive module 20. The processing module 20 is used to control the drive module 20 to drive the high-voltage circuit module 30 so that the high-voltage circuit module 30 is disconnected.

[0051] In this embodiment, since the processing module 10 is electrically connected to the drive module 20, the high-voltage circuit module 30 is electrically connected to the drive module 20, and the power module 40 is electrically connected to the drive module 20, the power module 40 can provide power to the drive module 20, enabling the drive module 20 to operate normally. Furthermore, the processing module 20 can control the drive module 10 to drive the high-voltage circuit module 30, causing the high-voltage circuit module 30 to disconnect. That is, in this embodiment, disconnecting the high-voltage circuit module 30 in the battery circuit control device is more reliable, avoiding risks and safety issues caused by the inability to disconnect the high-voltage circuit module 30, and thus preventing the risk of high-voltage safety contacts from large currents affecting vehicle occupants.

[0052] In some embodiments, the high-voltage circuit module 30 may include a switching unit 31, a current detection unit 32, a high-voltage circuit load 33, and a battery unit 34. The battery unit 34 is electrically connected to the current detection unit 32, the current detection unit 32 is electrically connected to the switching unit 31, the switching unit 31 is electrically connected to the high-voltage circuit load 33, the current detection unit 32 is electrically connected to the processing module 10, and the switching unit 31 is electrically connected to the drive module 20. The current detection unit 32 is used to detect the current of the battery unit 34, and when the current is greater than a first preset current value, it sends a first signal to the processing module 10. The processing module 10 is used to receive the first signal and control the drive module 20 to drive the switching unit 31 from the on state to the off state, so that the battery unit 34 stops supplying power to the high-voltage circuit load 33.

[0053] In this embodiment, since the battery unit 34 is electrically connected to the current detection unit 32, the current detection unit 32 can detect the current of the battery unit 34. Since the current detection unit 32 is electrically connected to the switch unit 31, and the switch unit 31 is electrically connected to the high-voltage circuit load 33, once the switch unit 31 is in the conducting state, the electrical energy of the battery unit 34 can be transferred to the high-voltage circuit load 33 through the switch unit 31, thereby supplying power to the high-voltage circuit load 33 and enabling the high-voltage circuit load 33 to operate. Since the current detection unit 32 is electrically connected to the processing module 10 and the switching unit 31 is electrically connected to the drive module 20, after the current detection unit 32 detects the current of the battery unit 34, once the current exceeds the first preset current value, the current detection unit 32 can send a first signal to the processing module 10. After receiving the first signal, the processing module 10 can control the drive module 20 to drive the switching unit 31, so that the switching unit 31 switches from the on state to the off state. Thus, after the electrical energy of the battery unit 34 is transferred to the switching unit 31, it cannot be transferred to the high-voltage circuit load 33, that is, the battery unit 34 stops supplying power to the high-voltage circuit load 33. In other words, in this embodiment, by electrically connecting the battery unit 34 to the current detection unit 32, the current detection unit 32 to the switch unit 31, and the switch unit 31 to the high-voltage circuit load 33, it is equivalent to connecting the current detection unit 32, the switch unit 31, and the high-voltage circuit load 33 in series, and then connecting them to the battery unit 34. Thus, the current detection unit 32 detects the current of the battery unit 34. Once the current is greater than the first preset current value, it indicates that the current is large. At this time, the drive module 20 can drive the switch unit 31 to switch from the on state to the off state, and the battery unit 34 will stop supplying power to the high-voltage circuit load 33. Therefore, after the battery circuit control device is applied to an electric vehicle, once the high-voltage circuit load 33 is not supplied with a large current, the risk of a large current posing a high-voltage safety contact hazard to the occupants of the vehicle can be avoided. That is, in this embodiment, by controlling the state switching of the switch unit 31, when the battery unit 34 contacts a large current, the risk of a large current posing a high-voltage safety contact hazard to the occupants of the vehicle can be avoided.

[0054] It should be noted that, in this embodiment, the high-voltage circuit load 33 can be a load in the vehicle that requires a large voltage, for example, the high-voltage circuit load 33 is a motor. Additionally, in this embodiment, the battery circuit control device can be applied in an electric vehicle, thus the battery unit 34 can be a battery module in the electric vehicle.

[0055] It should also be noted that when the current exceeds the first preset current value, it indicates that the current in the battery unit 34 is already large and poses a certain danger. Therefore, it is necessary to disconnect the connection between the battery unit 34 and the high-voltage circuit load 33 to avoid the high-voltage circuit load 33 being supplied with a large current, which could increase the safety risk to the people in the vehicle.

[0056] In addition, in this embodiment, the processing module 10 can be a vehicle controller. Of course, the processing module 10 can also be other components with control functions, such as a body controller. The specific type of the processing module 10 is not limited in this embodiment.

[0057] In some embodiments, the current detection unit 32 includes a first current detection element 321 and a second current detection element 322, and the battery unit 34 includes a positive terminal connection 341 and a negative terminal connection 342. The first current detection element 321 is electrically connected to the positive terminal connection 341 and is also electrically connected to the switching unit 31. The second current detection element 322 is electrically connected to the switching unit 31 or the high-voltage circuit load 33. Both the first current detection element 321 and the second current detection element 322 are electrically connected to the processing module 10. The first current detection element 321 is used to detect the current at the positive terminal connection 341, and the second current detection element 322 is used to detect the current at the negative terminal connection 342.

[0058] With this configuration, the first current detector 321 can detect the current at the positive terminal 341 of the battery cell 34, and the second detector can detect the current at the negative terminal 342 of the battery cell 34. This allows for the detection of both the positive and negative currents of the battery cell 34, making the current detection of the battery cell 34 more comprehensive. Furthermore, by using both the first and second current detectors 321 and 322, if one of them fails, the other can continue to detect the current of the battery cell 34. The detected current can then be sent to the processing module 10, causing the processing module 10 to drive a change in the state of the switching unit 31 via the driving unit. In short, by using both the first and second current detectors 321 and 322, the comprehensiveness of the detection of the battery cell 34 can be improved, allowing the current of the battery cell 34 to be detected in real time.

[0059] In some embodiments, the switching unit 31 includes a first switching element 311 and an active fuse 312; the first switching element 311 is electrically connected to the active fuse 312, and the first switching element 311 is electrically connected to the first current detection element 321, the active fuse 312 is electrically connected to the high-voltage circuit load 33, and the high-voltage circuit load 33 is electrically connected to the second current detection element 322; or, the active fuse 312 is electrically connected to the first current detection element 321, the active fuse 312 is electrically connected to the high-voltage circuit load 33, the high-voltage circuit load 33 is electrically connected to the first switching element 311, and the first switching element 311 is electrically connected to the second current detection element 322; wherein, both the first switching element 311 and the active fuse 312 are electrically connected to the processing module 10, the processing module 10 is used to control the drive module 20 to drive the first switching element 311 to switch from the on state to the off state, and in the event of a failure of the first switching element 311, to switch the active fuse 312 from the on state to the off state.

[0060] When the first switch 311 is electrically connected to the active fuse 312, and the first switch 311 is electrically connected to the first current detection element 321, the active fuse 312 is electrically connected to the high-voltage circuit load 33, and the high-voltage circuit load 33 is electrically connected to the second current detection element 322, it is equivalent to the first switch 311 connecting or disconnecting the positive terminal 341 of the battery unit 34 from the high-voltage circuit load 33. Specifically, once the first current detection element 321 detects that the current at the positive terminal 341 of the battery unit 34 is greater than a first preset current value, the first current detection element 321 transmits the detected current information to the processing module 10. The processing module 10 can then control the drive module 20 to drive the first switch 311 to switch from the connected state to the disconnected state. After the current flowing from the positive terminal 341 is transmitted to the first switch 311, the current will not be transmitted to the high-voltage circuit load 33 through the first switch 311, thereby avoiding a large current being transmitted to the high-voltage circuit load 33. Furthermore, by setting up an active fuse 312, if the first switch 311 malfunctions—for example, if a large current causes the first switch 311 to stick and fail to disconnect, i.e., the first switch 311 cannot switch from the on state to the off state—the active fuse 312 can be driven by the drive module 20 to switch from the on state to the off state, thus preventing current from being transmitted to the high-voltage circuit load 33.

[0061] When the active fuse 312 is electrically connected to the first current detector 321, the active fuse 312 is electrically connected to the high-voltage circuit load 33, the high-voltage circuit load 33 is electrically connected to the first current detector 321, and the first current detector 321 is electrically connected to the second current detector 322, it is equivalent to the first switch 311 connecting or disconnecting the positive terminal 341 of the battery unit 34 from the high-voltage circuit load 33. Specifically, once the second current detector 322 detects that the current at the negative terminal 342 of the battery unit 34 is greater than the first preset current value, the second current detector 322 transmits the detected current information to the processing module 10. The processing module 10 can then control the drive module 20 to switch the first switch 311 from the on state to the off state. After the current flowing from the positive terminal 341 is transmitted to the high-voltage circuit load 33, the current is transmitted to the first switch 311, but the first switch 311 is in the off state. Therefore, the current flowing through the high-voltage circuit load will not form a loop, which means that the high-voltage circuit load 33 will not bear a large current. Furthermore, by setting up an active safety device 312, if the first switch 311 malfunctions—for example, if a large current causes the first switch 311 to stick and fail to disconnect, i.e., the first switch 311 cannot switch from the conducting state to the disconnected state—the active safety device 312 can be driven by the drive module 20 to switch from the conducting state to the disconnected state, thus ensuring that the high-voltage circuit load 33 will not experience a large current.

[0062] In addition, by setting the active safety device 312 and the first switch 311, it is equivalent to providing double protection for the high-voltage circuit load 33. The first switch 311 is equivalent to the first layer of protection, and the active safety device 312 is equivalent to the second layer of protection, which can prevent the high-voltage circuit load 33 from bearing a large current and causing safety problems.

[0063] It should be noted that, in the embodiments of this application, the first switching device 311 includes, but is not limited to, relays, contactors, IGBTs, silicon carbide and other devices, and the active fuse 312 includes, but is not limited to, resettable fuses, semiconductor discharge tubes, TVS diodes, ceramic gas discharge tubes and other devices.

[0064] In some embodiments, the switching unit 31 includes a first switching element 311, an active fuse 312, and a second switching element 313; the first switching element 311 is electrically connected to the active fuse 312 and to a first current detection element 321; the active fuse 312 is electrically connected to the high-voltage circuit load 33; the high-voltage circuit load 33 is electrically connected to the second switching element 313; and the second switching element 313 is electrically connected to a second current detection element 322; or, the first switching element 311 is electrically connected to the high-voltage circuit load 33 and to the first current detection element 321. The high-voltage circuit load 33 is electrically connected to the active fuse 312, the active fuse 312 is electrically connected to the second switch 313, and the second switch 313 is electrically connected to the second current detection element 322. The first switch 311, the active fuse 312, and the second switch 313 are all electrically connected to the processing module 10. The processing module 10 is used to control the drive module 20 to drive the first switch 311 and / or the second switch to switch from the on state to the off state. In the event of a failure of the first switch 311 or the second switch 313, the active fuse 312 is switched from the on state to the off state.

[0065] When the first switch 311 is electrically connected to the active fuse 312, and the first switch 311 is electrically connected to the first current detection element 321, the active fuse 312 is electrically connected to the high-voltage circuit load 33, the high-voltage circuit load 33 is electrically connected to the second switch 313, and the second switch 313 is electrically connected to the second current detection element 322, it is equivalent to the first switch 311 connecting or disconnecting the positive terminal 341 of the battery unit 34 from the high-voltage circuit load 33, and the second switch 313 connecting or disconnecting the negative terminal 342 of the battery unit 34 from the high-voltage circuit load 33. Specifically, once the first current detector 321 detects that the current at the positive terminal 341 of the battery unit 34 is greater than the first preset current value, or the second current detector 322 detects that the current at the negative terminal 342 of the battery unit 34 is greater than the first preset current value, the first current detector 321 or the second current detector 322 transmits the detected current information to the processing module 10. The processing module 10 can then control the drive module 20 to drive the first switch 311 and the second switch to switch from the on state to the off state. After the current flowing out from the positive terminal 341 is transmitted to the first switch 311, the current will not be transmitted to the high-voltage circuit load 33 through the first switch 311, thereby avoiding a large current being transmitted to the high-voltage circuit load 33. Furthermore, by setting up an active fuse 312, if the first switch 311 and the second switch 313 malfunction—for example, if a large current causes the first switch 311 and the second switch 313 to stick together and fail to disconnect, i.e., the first switch 311 and the second switch 313 cannot switch from the on state to the off state—the active fuse 312 can be driven by the drive module 20 to switch from the on state to the off state, so that the current will still not be transmitted to the high-voltage circuit load 33.

[0066] When the first switch 311 is electrically connected to the high-voltage circuit load 33, and the first switch 311 is electrically connected to the first current detection element 321, the high-voltage circuit load 33 is electrically connected to the active fuse 312, the active fuse 312 is electrically connected to the second switch 313, and the second switch 313 is electrically connected to the second current detection element 322, it is equivalent to the first switch 311 connecting or disconnecting the positive terminal 341 of the battery unit 34 from the high-voltage circuit load 33, and the second switch 313 connecting or disconnecting the negative terminal 342 of the battery unit 34 from the high-voltage circuit load 33. Specifically, once the first current detector 321 detects that the current at the positive terminal 341 of the battery unit 34 is greater than the first preset current value, or the second current detector 322 detects that the current at the negative terminal 342 of the battery unit 34 is greater than the first preset current value, the first current detector 321 or the second current detector 322 transmits the detected current information to the processing module 10. The processing module 10 can then control the drive module 20 to drive the first switch 311 and the second switch to switch from the on state to the off state. After the current flowing out from the positive terminal 341 is transmitted to the first switch 311, the current will not be transmitted to the high-voltage circuit load 33 through the first switch 311, thereby avoiding a large current being transmitted to the high-voltage circuit load 33. Furthermore, by setting up an active fuse 312, if the first switch 311 and the second switch 313 malfunction—for example, if a large current causes the first switch 311 and the second switch 313 to stick together and fail to disconnect, i.e., the first switch 311 and the second switch 313 cannot switch from the on state to the off state—the active fuse 312 can be driven by the drive module 20 to switch from the on state to the off state, so that the current will still not be transmitted to the high-voltage circuit load 33.

[0067] In addition, by setting up the active safety device 312, the first switch 311 and the second switch 313, it is equivalent to providing double protection for the high-voltage circuit load 33. The first switch 311 and the second switch 313 are equivalent to the first layer of protection, and the active safety device 312 is equivalent to the second layer of protection. This can prevent the high-voltage circuit load 33 from bearing a large current and causing safety problems.

[0068] In some embodiments, the driving module 20 includes a logic conversion module 21, a first switch driving circuit 22, a second switch driving circuit 23, a third switch driving circuit 24, a fourth switch driving circuit 25, a first fuse driving circuit 26, and a second fuse driving circuit 27. The first switch driving circuit 22, the second switch driving circuit 23, the third switch driving circuit 24, the fourth switch driving circuit 25, the first fuse driving circuit 26, and the second fuse driving circuit 27 are all electrically connected to the logic conversion module 21, and the logic conversion module 21 is electrically connected to the processing module 10. The first switch driving circuit 22 and the second switch driving circuit 23 are both electrically connected to the first switch element 311, the third switch driving circuit 24 and the fourth switch driving circuit 25 are both electrically connected to the second switch element 313, and the first fuse driving circuit 26 and the second fuse driving circuit 27 are both electrically connected to the active fuse element 312.

[0069] With this setup, the logic conversion module 21 is electrically connected to the first switch element 311 via the first switch driving circuit 22 and the second switch driving circuit 23. This effectively employs a two-stage drive circuit control for the first switch element 311. Even if one of these two circuits fails, the logic conversion module 21 can still drive the first switch element 311 through the other, allowing its state to change. In other words, by using the first and second switch driving circuits 22 and 23, the effectiveness of state switching for the first switch element 311 is improved, preventing the first switch element 311 from failing to switch due to a drive circuit malfunction. For example, if the first switch driving circuit 22 fails but the second switch driving circuit 23 is functioning normally, when the first switch element 311 needs to be switched, the logic conversion module 21 can send a command to the second switch driving circuit 23, which will then drive the first switch element 311 from the on state to the off state.

[0070] Furthermore, by setting up the third switch drive circuit 24 and the fourth switch drive circuit 25, the logic conversion module 21 is effectively electrically connected to the second switch 313 through these two circuits. This means that the second switch 313 is controlled by a two-stage drive circuit. Even if one of these circuits fails, the logic conversion module 21 can still drive the first switch 313 through the other, allowing the state of the second switch 313 to change. In other words, by setting up the third and fourth switch drive circuits 24 and 25, the effectiveness of state switching for the second switch 313 can be improved, preventing the second switch 313 from failing to switch due to drive circuit failure. For example, if the third switch drive circuit 24 fails but the fourth switch drive circuit 25 is functioning normally, when the second switch 313 needs to be switched, the logic conversion module 21 can send a command to the fourth switch drive circuit 25, which will then drive the second switch 313 from the on state to the off state.

[0071] Furthermore, by setting up the first fuse drive circuit 26 and the second fuse drive circuit 27, the logic conversion module 21 is effectively electrically connected to the active fuse 312 through these two circuits. This means that the active fuse 312 is controlled by a two-stage drive circuit. Even if one of these circuits fails, the logic conversion module 21 can still drive the first switch 311 through the other, allowing the state of the active fuse 312 to change. In other words, by setting up the first fuse drive circuit 26 and the second fuse drive circuit 27, the effectiveness of the state switching of the active fuse 312 can be improved, avoiding the problem that a drive circuit failure might prevent the active fuse 312 from being switched. For example, if the first fuse drive circuit 26 fails but the second fuse drive circuit 27 is functioning normally, when the active fuse 312 needs to be switched, the logic conversion module 21 can send a command to the second fuse drive circuit 27, which can then drive the active fuse 312 from the on state to the off state.

[0072] It should be noted that, in this embodiment, the logic conversion module 21 may include OR gates and AND gates. For example, as Figure 10 As shown, the logic conversion module 21 includes an OR gate and an AND gate.

[0073] In some embodiments, the drive module 20 further includes a signal isolator 28. The first current detection element 321 and the second current detection element 322 are both electrically connected to the signal isolator 28, which is electrically connected to the logic conversion module 21. By setting the signal isolator 28, once the first current detection element 321 and / or the second current detection element 322 detects the current information of the battery unit 34, they can transmit the detected current information to the signal isolator 28. The signal isolator 28 can then receive the current information and convert its type, allowing the converted current information to be recognized by the logic conversion module 21. This facilitates subsequent control by the logic conversion module 21 based on the received current information.

[0074] It should be noted that after the signal isolator 28 performs type conversion on the current information, once the current information is transmitted to the logic conversion module 21, the logic conversion module 21 can transmit the current information to the processing module 10. When the processing module 10 determines that the current corresponding to the current information is greater than the first preset current value, the processing module 10 can send a control signal to the logic conversion module 21. The logic conversion module 21 can then control the first switch driving circuit 22, the second switch driving circuit 23, the third switch driving circuit 24, and the fourth switch driving circuit 25 based on the control signal, so that the first switch 311 and / or the second switch 313 switch from the on state to the off state.

[0075] In some embodiments, the battery circuit control device further includes a power supply unit 40; the first switch drive circuit 22, the second switch drive circuit 23, the third switch drive circuit 24, the fourth switch drive circuit 25, the first fuse drive circuit 26, and the second fuse drive circuit 27 are all electrically connected to the power supply unit 40, and the power supply unit 40 is used to provide power to the first switch drive circuit 22, the second switch drive circuit 23, the third switch drive circuit 24, the fourth switch drive circuit 25, the first fuse drive circuit 26, and the second fuse drive circuit 27.

[0076] By providing power supply unit 40, the power supply unit 40 can provide power to the first switch drive circuit 22, the second switch drive circuit 23, the third switch drive circuit 24, the fourth switch drive circuit 25, the first fuse drive circuit 26, and the second fuse drive circuit 27. This ensures that the first switch drive circuit 22, the second switch drive circuit 23, the third switch drive circuit 24, the fourth switch drive circuit 25, the first fuse drive circuit 26, and the second fuse drive circuit 27 can be driven normally, avoiding the problem that the first switch drive circuit 22, the second switch drive circuit 23, the third switch drive circuit 24, the fourth switch drive circuit 25, the first fuse drive circuit 26, and the second fuse drive circuit 27 may fail to drive due to lack of power.

[0077] It should be noted that, in this embodiment, the power supply unit 40 may include a first power supply 41, a first isolation power supply 42, a second power supply 43, a second isolation power supply 44, a third power supply 45, and a third isolation power supply 46. The first power supply 41 is electrically connected to the first isolation power supply 42. The first isolation power supply 42 is electrically connected to the first switch driving circuit 22 and the second switch driving circuit 23, respectively. The second power supply 43 is electrically connected to the second isolation power supply 44. The second isolation power supply 44 is electrically connected to the third switch driving circuit 24 and the fourth switch driving circuit 25, respectively. The third power supply 45 is electrically connected to the third isolation power supply 46. The third isolation power supply 46 is electrically connected to the first fuse driving circuit 26 and the second fuse driving circuit 27, respectively. Additionally, the third isolation power supply 46 may be electrically connected to the logic conversion module 21.

[0078] In addition, in some embodiments, the battery circuit control device further includes a collision detection module 50, which is electrically connected to the logic conversion module 21. The collision detection module 50 is used to detect collision signals. When the collision detection module 50 detects a collision signal, the logic conversion module 21 drives the active fuse 312 to switch from the on state to the off state through the first fuse drive circuit 26 and / or the second fuse drive circuit 27.

[0079] By setting up a collision detection module 50, after the battery circuit control device is applied to an electric vehicle, the collision detection module 50 can detect collision signals. That is, once the electric vehicle is involved in a collision, the collision detection module 50 can detect the collision signal and send a command to the logic conversion module 21. The logic conversion module 21 then sends a command to the processing module 10, which in turn sends a control signal to the logic conversion module 21. The logic conversion module 21 then sends the control signal to the first fuse drive circuit 26 and the second fuse drive circuit 27. The first fuse drive circuit 26 or the second fuse drive circuit 27 then drives the active fuse 312 to switch from a conducting state to a disconnected state, preventing battery power from being transferred to the high-voltage circuit load 33. In other words, by setting up the collision detection module 50, the high-voltage circuit load 33 will be de-energized once the vehicle is involved in a collision, improving the safety of the occupants and preventing leakage due to the high-voltage circuit load 33 being energized after a collision, thus avoiding the increased risk to the occupants.

[0080] In some embodiments, the drive module 20 further includes a first control switch 201, a second control switch 202, and an overcurrent detection unit 203; the logic conversion module 21 is electrically connected to the first fuse drive circuit 26 through the first control switch 201, and the logic conversion module 21 is electrically connected to the second fuse drive circuit 27 through the second control switch 202; the first current detection element 321 and the second current detection element 322 are both electrically connected to the overcurrent detection unit 203; the overcurrent detection unit 203 is electrically connected to the first control switch 201 and the second control switch 202 respectively; the overcurrent detection unit 203 is used to control the first control switch 201 and the second control switch 202 to switch from the on state to the off state when the current is greater than the second preset current value, so that the active fuse 312 switches from the on state to the off state.

[0081] With this configuration, if the current detected by the overcurrent detection unit 203 exceeds the second preset current value, it indicates that the current in the battery unit 34 is already quite high. The overcurrent detection module can then directly control the first control switch 201 and the second control switch 202 to switch from the ON state to the OFF state, thereby causing the active fuse 312 to switch from the ON state to the OFF state. The large current from the battery unit 34 will not be transmitted to the high-voltage circuit load 33, further improving the safety of the occupants. In other words, by setting up the overcurrent detection unit 203, once the battery current is too high, the active fuse 312 can be directly controlled to disconnect, thus quickly protecting the occupants.

[0082] It should be noted that, in the embodiments of this application, the second preset current value can be greater than the first preset current value.

[0083] In addition, in this embodiment, when the battery cell 34 includes a third power supply 45 and a third isolation power supply 46, the logic conversion module 21 can be electrically connected to the third isolation power supply 46. The third power supply 45 and the third isolation power supply 46 are electrically connected. The first control switch 201 is connected between the third isolation power supply 46 and the first fuse drive circuit 26. The third isolation power supply 46 is electrically connected to the first fuse drive circuit through the first control switch 201, thereby making the logic conversion module 21 electrically connected to the first fuse drive circuit 26 through the first control switch 201. The second control switch 202 is connected between the third isolation power supply 46 and the second fuse drive circuit 27. The third isolation power supply 46 is electrically connected to the second fuse drive circuit through the second control switch 202, thereby making the logic conversion module 21 electrically connected to the second fuse drive circuit 27 through the second control switch 202.

[0084] In some embodiments, the battery circuit control device further includes an information collection module 60, which is electrically connected to the processing module 10. The information collection module 60 is used to collect signals other than those in the high-voltage circuit module 30, so that the processing module 10 can control the drive module 20. By providing the information collection module 60, signals other than those in the high-voltage circuit module 30 can be collected, allowing the processing module 10 to receive other signals and control the switching unit 31 based on these other signals.

[0085] It should be noted that, in the embodiments of this application, the information collection module 60 may include a communication interaction unit 61, a signal detection unit 62, and a hard wire identification unit 63. The communication interaction unit 61 is used to interact with the electric vehicle or the charging pile, the signal detection unit 62 is used to detect the external wake-up signal and temperature indicator light of the electric vehicle, and the hard wire identification unit 63 is used to identify information such as high voltage interlock signal and collision signal.

[0086] For example, if the information collection module 60 collects the signal that the electric vehicle is currently charging, that is, it collects the signal of the interaction between the electric vehicle and the charging pile, the processing module 10 can drive the switch unit 31 from the on state to the off state through the drive module 20, so as to avoid the problem that the battery unit 34 discharges to the high-voltage circuit load 33 in the vehicle while charging through the charging pile, which affects the charging efficiency of the battery unit 34.

[0087] In this embodiment, since the battery unit 34 is electrically connected to the current detection unit 32, the current detection unit 32 can detect the current of the battery unit 34. Since the current detection unit 32 is electrically connected to the switch unit 31, and the switch unit 31 is electrically connected to the high-voltage circuit load 33, once the switch unit 31 is in the conducting state, the electrical energy of the battery unit 34 can be transferred to the high-voltage circuit load 33 through the switch unit 31, thereby supplying power to the high-voltage circuit load 33 and enabling the high-voltage circuit load 33 to operate. Since the current detection unit 32 is electrically connected to the processing module 10 and the switching unit 31 is electrically connected to the drive module 20, after the current detection unit 32 detects the current of the battery unit 34, once the current exceeds the first preset current value, the current detection unit 32 can send a first signal to the processing module 10. After receiving the first signal, the processing module 10 can control the drive module 20 to drive the switching unit 31, so that the switching unit 31 switches from the on state to the off state. Thus, after the electrical energy of the battery unit 34 is transferred to the switching unit 31, it cannot be transferred to the high-voltage circuit load 33, that is, the battery unit 34 stops supplying power to the high-voltage circuit load 33. In other words, in this embodiment, by electrically connecting the battery unit 34 to the current detection unit 32, the current detection unit 32 to the switch unit 31, and the switch unit 31 to the high-voltage circuit load 33, it is equivalent to connecting the current detection unit 32, the switch unit 31, and the high-voltage circuit load 33 in series, and then connecting them to the battery unit 34. Thus, the current detection unit 32 detects the current of the battery unit 34. Once the current is greater than the first preset current value, it indicates that the current is large. At this time, the drive module 20 can drive the switch unit 31 to switch from the on state to the off state, and the battery unit 34 will stop supplying power to the high-voltage circuit load 33. Therefore, after the battery circuit control device is applied to an electric vehicle, once the high-voltage circuit load 33 is not supplied with a large current, the risk of a large current posing a high-voltage safety contact hazard to the occupants of the vehicle can be avoided. That is, in this embodiment, by controlling the state switching of the switch unit 31, when the battery unit 34 contacts a large current, the risk of a large current posing a high-voltage safety contact hazard to the occupants of the vehicle can be avoided.

[0088] This application provides an electric vehicle, including: a battery circuit control device as described in any of the above embodiments.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery circuit control device, characterized in that, The battery circuit control device includes: a processing module (10), a drive module (20), a high-voltage circuit module (30), and a power supply unit (40). The processing module (10) is electrically connected to the drive module (20), the high-voltage circuit module (30) is electrically connected to the drive module (20), and the power supply unit (40) is electrically connected to the drive module (20). The power supply unit (40) is used to provide power to the drive module (20). The processing module (10) is used to control the drive module (20) to drive the high-voltage circuit module (30) so that the high-voltage circuit module (30) is disconnected; The high-voltage circuit module (30) includes a switching unit (31), a current detection unit (32), a high-voltage circuit load (33), and a battery unit (34). The battery unit (34) is electrically connected to the current detection unit (32), the current detection unit (32) is electrically connected to the switching unit (31), the switching unit (31) is electrically connected to the high-voltage circuit load (33), the current detection unit (32) is electrically connected to the processing module (10), and the switching unit (31) is electrically connected to the drive module (20). The current detection unit (32) is used to detect the current of the battery unit (34), and when the current is greater than the first preset current value, it sends a first signal to the processing module (10). The processing module (10) is used to receive the first signal and control the driving module (20) to drive the switching unit (31) to switch from the on state to the off state, so that the battery unit (34) stops supplying power to the high voltage circuit load (33). The current detection unit (32) includes a first current detection element (321) and a second current detection element (322), and the battery unit (34) includes a positive terminal connection (341) and a negative terminal connection (342). The first current detection element (321) is electrically connected to the positive terminal (341), and the first current detection element (321) is electrically connected to the switching unit (31). The second current detection element (322) is electrically connected to the switching unit (31) or the high-voltage circuit load (33). The first current detection device (321) and the second current detection device (322) are both electrically connected to the processing module (10). The first current detection device (321) is used to detect the current of the positive terminal (341), and the second current detection device (322) is used to detect the current of the negative terminal (342). The switching unit (31) includes a first switching element (311) and an active safety element (312); The first switch (311) is electrically connected to the active fuse (312), and the first switch (311) is electrically connected to the first current detection element (321). The active fuse (312) is electrically connected to the high-voltage circuit load (33), and the high-voltage circuit load (33) is electrically connected to the second current detection element (322). Alternatively, the active fuse (312) is electrically connected to the first current detection element (321), the active fuse (312) is electrically connected to the high-voltage circuit load (33), the high-voltage circuit load (33) is electrically connected to the first switch (311), and the first switch (311) is electrically connected to the second current detection element (322). The first switch (311) and the active safety device (312) are both electrically connected to the processing module (10). The processing module (10) is used to control the driving module (20) to drive the first switch (311) to switch from the on state to the off state, and to switch the active safety device (312) from the on state to the off state in the event of a failure of the first switch (311).

2. The battery circuit control device according to claim 1, characterized in that, The switching unit (31) includes a first switching element (311), an active safety element (312), and a second switching element (313); The first switch (311) is electrically connected to the active fuse (312), and the first switch (311) is electrically connected to the first current detection element (321). The active fuse (312) is electrically connected to the high-voltage circuit load (33). The high-voltage circuit load (33) is electrically connected to the second switch (313). The second switch (313) is electrically connected to the second current detection element (322). Alternatively, the first switch (311) is electrically connected to the high-voltage circuit load (33), and the first switch (311) is electrically connected to the first current detection element (321), the high-voltage circuit load (33) is electrically connected to the active fuse (312), the active fuse (312) is electrically connected to the second switch (313), and the second switch (313) is electrically connected to the second current detection element (322); The first switch (311), the active safety device (312), and the second switch (313) are all electrically connected to the processing module (10). The processing module (10) is used to control the driving module (20) to drive the first switch (311) and / or the second switch to switch from the on state to the off state, and in the event of a failure of the first switch (311) and the second switch (313), to switch the active safety device (312) from the on state to the off state.

3. The battery circuit control device according to claim 2, characterized in that, The driving module (20) includes a logic conversion module (21), a first switch driving circuit (22), a second switch driving circuit (23), a third switch driving circuit (24), a fourth switch driving circuit (25), a first fuse driving circuit (26), and a second fuse driving circuit (27). The first switch driving circuit (22), the second switch driving circuit (23), the third switch driving circuit (24), the fourth switch driving circuit (25), the first fuse driving circuit (26), and the second fuse driving circuit (27) are all electrically connected to the logic conversion module (21), and the logic conversion module (21) is electrically connected to the processing module (10). The first switch driving circuit (22) and the second switch driving circuit (23) are both electrically connected to the first switch (311), the third switch driving circuit (24) and the fourth switch driving circuit (25) are both electrically connected to the second switch (313), and the first fuse driving circuit (26) and the second fuse driving circuit (27) are both electrically connected to the active fuse (312).

4. The battery circuit control device according to claim 3, characterized in that, The driving module (20) further includes a signal isolation component (28), the first current detection component (321) and the second current detection component (322) are both electrically connected to the signal isolation component (28), and the signal isolation component (28) is electrically connected to the logic conversion module (21).

5. The battery circuit control device according to claim 3, characterized in that, The first switch driving circuit (22), the second switch driving circuit (23), the third switch driving circuit (24), the fourth switch driving circuit (25), the first fuse driving circuit (26), and the second fuse driving circuit (27) are all electrically connected to the power supply unit (40). The power supply unit (40) is used to provide power to the first switch driving circuit (22), the second switch driving circuit (23), the third switch driving circuit (24), the fourth switch driving circuit (25), the first fuse driving circuit (26), and the second fuse driving circuit (27).

6. The battery circuit control device according to claim 3, characterized in that, The battery circuit control device further includes a collision detection module (50), which is electrically connected to the logic conversion module (21). The collision detection module (50) is used to detect collision signals. When the collision detection module (50) detects a collision signal, the logic conversion module (21) drives the active fuse (312) to switch from the on state to the off state through the first fuse drive circuit (26) and / or the second fuse drive circuit (27).

7. The battery circuit control device according to claim 3, characterized in that, The drive module (20) also includes a first control switch (201), a second control switch (202), and an overcurrent detection unit (203); The logic conversion module (21) is electrically connected to the first fuse drive circuit (26) through the first control switch (201), and the logic conversion module (21) is electrically connected to the second fuse drive circuit (27) through the second control switch (202). The first current detection element (321) and the second current detection element (322) are both electrically connected to the overcurrent detection unit (203). The overcurrent detection unit (203) is electrically connected to the first control switch (201) and the second control switch (202) respectively. The overcurrent detection unit (203) is used to control the first control switch (201) and the second control switch (202) to switch from the on state to the off state when the current is greater than the second preset current value, so that the active fuse (312) switches from the on state to the off state.

8. The battery circuit control device according to any one of claims 1-7, characterized in that, The battery circuit control device further includes an information collection module (60), which is electrically connected to the processing module (10). The information collection module (60) is used to collect signals other than those in the high-voltage circuit module (30) so that the processing module (10) can control the drive module (20).

9. An electric vehicle, characterized in that, include: The battery circuit control device according to any one of claims 1-8.

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