Contemporary Amperex Technology Co., Ltd.

Contemporary Amperex Technology (hong Kong) Limited

Contemporary Amperex Technology Limited

Yanhui Fu

Le Chu

Qiandeng Li

Changjian Liu

Jirong Huo

Baohai Du

Kai Wu

Yuqun Zeng

Xingchang Wang

Guoxiu Wu

Qidong Lou

Weiqiang Li

Jianwei Zhuo

Zhongliang Guo

Dachun Yang

Xinxin Jiang

Qi Xiao

Daqun Yang

This application relate to a rechargeable battery monitoring system, a battery pack, and an electric vehicle. A rechargeable battery includes battery units and an MSD switch. The battery units are serially-connected, and the MSD switch is connected between adjacent battery units. The monitoring system includes a BMU and an equal number of CMCs that have one-to-one correspondence with the battery units. The CMCs are divided into CMC groups that meet preset conditions. The monitoring system further includes an equal number of daisy chain buses that are in one-to-one correspondence with the CMC groups. Each CMC group is connected to the BMU through one daisy chain bus. This embodiment helps a battery pack and an electric vehicle to avoid damage caused by a chip on the CMC in a process of plugging or unplugging the MSD switch, and help the CMC accurately monitor the battery units in the rechargeable battery.

Rechargeable battery monitoring system, battery pack and electric vehicle

Embodiments of this application relate to the field of electricity, and disclose a drive circuit. In some embodiments of this application, the drive circuit includes a low-side driver module and a delay module, the delay module is configured to output a delay signal of preset duration to the low-side driver module in a case that a control module is being reset; and the low-side driver module is configured to: according to on the delay signal of preset duration, maintain a first state within the preset duration, the first state being the same as a second state; where the second state is a working state of the low-side driver module before the control module is reset, and the second state includes being on or off. The embodiments can help avoid safety hazards caused by unexpected disconnection of a drive signal of the control module.

Drive circuit

This application relates to the technical field of electronics, and discloses a detection circuit and a detection method of an electrical control device, and an electric vehicle. In some embodiments of this application, the detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module and a low-side switch unit. The detection circuit includes: a first detection module, a second detection module, and a control module. The control module is configured to obtain an electrical signal at a third end of the first detection module, and/or an electrical signal at a second end of the second detection module; and determine, based on the electrical signal at the third end of the first detection module, and/or the electrical signal at the second end of the second detection module, whether the drive circuit of the electrical control device is faulty.

Detection circuit and detection method of electrical control device, and electric vehicle

Embodiments of this application relate to the field of electricity, and disclose a drive circuit. In some embodiments of this application, the drive circuit includes a high-side driver module and a delay module, the delay module is configured to output a delay signal of preset duration to the high-side driver module in a case that a control module is being reset; and the high-side driver module is configured to: according to the delay signal of preset duration, remain in a first state within the preset duration, the first state being the same as a second state; where the second state is a working state of the high-side driver module before the control module is reset, and the second state includes being on or off.

The application provides a high-voltage interlocking device and method for detecting the high-voltage interlocking device. The high-voltage interlocking device includes a first resistance module; a first switch module, a second connection end of the first switch module being connected to a first reference potential through a third resistance module, and a control terminal of the first switch module being configured to receive a first driving signal, to enable the first switch module to be turned on or off; a second resistance module, another end of the second resistance module being connected to a second reference potential; a fourth resistance module; a second switch module, a second connection end of the second switch module being connected to a third reference potential through a fifth resistance module; a fault detection module, configured to determine a fault of the high-voltage component underdetection according to a first detection signal.

High-voltage interlocking device and method for detecting the high-voltage interlocking device

This application discloses an electrical control device detection circuit, a detection method, and an electric vehicle. The detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module, a high-side switch unit, and a low-side switch unit. The detection circuit includes: a detection power module, a first switch module, a second switch module, a first detection module, a second detection module, and a control module. The control module is configured to obtain an electrical signal at a third end of the first detection module and/or an electrical signal at a second end of the second detection module; and determine, based on the electrical signal at the third end of the first detection module and/or the electrical signal at the second end of the second detection module, whether a fault occurs in the drive circuit of the electrical control device.

Electrical control device detection circuit, detection method, and electric vehicle

The present application discloses a circuit and a method for detecting insulation resistance. The circuit includes: a first voltage dividing module, a second voltage dividing module, a third voltage dividing module, a fourth voltage dividing module, a first switch module, a fifth voltage dividing module, a second switch module, a third switch module, and a detecting module, where the first voltage dividing module comprises a first voltage dividing unit and a second voltage dividing unit, and the third voltage dividing module comprises a third voltage dividing unit and a fourth voltage dividing unit. According to the embodiments of the present application, errors caused by fluctuations in the pull-up of the reference power supply can be avoided, and the accuracy of the circuit for detecting insulation resistance can be effectively improved.

Circuit and method for detecting insulation resistance

The application provides a high voltage interlock circuit and a detection method thereof, the high voltage interlock circuit comprises: a signal isolation conversion module, and a fault detection module. The high voltage interlock device and the detection method thereof provided by the embodiments of the application can avoid the damage to the fault detection module caused by large external voltage, and improve the safety of the high voltage interlock device.

High voltage interlock device and detection method thereof

Embodiments of this application relate to the technical field of electronics, and disclose an electrical control device detection circuit, a detection method, and an electric vehicle. In some embodiments of this application, the detection circuit is configured to detect a drive circuit of the electrical control device. The drive circuit includes a high-side switch unit. The detection circuit includes a first detection module and a control module. A first end of the first detection module is connected to a first end of the electrical control device. A second end of the first detection module is connected to a second end of the electrical control device. A third end of the first detection module is connected to the control module.

The application discloses a high voltage interlock circuit and a detection method thereof. The circuit comprises: a first switching module; a second switching module, comprising a first driving unit and a first switching unit arranged in isolation, the first switching unit is arranged between a second power supply and a second power ground; a third switching module, comprising a second driving unit and a second switching unit arranged in isolation; a fourth switching module, arranged between the fourth power supply and the first power ground; a controller. The embodiments of the application improve the accuracy of fault detection.

High voltage interlock circuit and detection method thereof

Embodiments of the present disclosure relate to the field of battery technologies, and disclose a pre-charging circuit for a high voltage battery pack and a pre-charging method therefor. In some embodiments of the present disclosure, during a charging process, a control module switches on a charging switching module and switches off a charging pre-charging module after determining that a voltage at the first end of the charging switching module and a voltage at the second end of the charging switching module comply with a first constraint relationship; during a discharging process, the control module switches on the main positive switching module and switches off the main positive pre-charging module after determining that a voltage at the first end of the main positive switching module and a voltage at the second end of the main positive switching module comply with a second constraint relationship.

Pre-charging circuit and pre-charging method for high voltage battery pack

The application provide a high-voltage interlock device and a fault detection method thereof. The high-voltage interlock device includes: a first signal detection circuit, configured to collect a first original electric signal from a high-voltage interlock component and convert the first original electric signal into a first sampled signal while ensuring that the high-voltage interlock component is isolated from a fault diagnosis module; a second signal detection circuit, configured to collect a second original electric signal from the high-voltage interlock component and convert the second original electric signal into a second sampled signal while ensuring that the high-voltage interlock component is isolated from the fault diagnosis module; the fault diagnosis module, configured to determine a fault of the high-voltage interlock component according to the first and/or the second sampled signal, under a condition that at least one of the first and the second switch modules is in an OFF state.

High-voltage interlock device and fault detection method thereof

Disclosed are a load state detection circuit and method. A microcontroller is connected to a switch unit which is connected between a detecting power supply and a load to be tested. A voltage sampling point is formed at either terminal of the load to be tested, and the voltage sampling circuit is connected between the voltage sampling point and the microcontroller. The voltage sampling circuit is configured to sample a voltage at the voltage sampling point. The microcontroller is configured to connect the load to be tested and the detecting power supply by controlling the switch unit, and determine whether a fault exists in the load to be tested according to a received voltage at the voltage sampling point sampled by the voltage sampling circuit, before connecting the load to be tested with the drive power supply.

Load state detection circuit and method

The present disclosure discloses a detection circuit and method. The detection circuit comprises: a controller, a battery pack, a main positive switch module, a main negative switch module and at least one detection loop. The controller collects voltages of a positive electrode and a negative electrode of the battery pack and a voltage between external sides of the main positive switch module and the main negative switch module when turning on the main positive or negative switch module and after turning on any detection loop, and obtains resistance values of insulation resistors of the external sides according to resistance values of insulation resistors of internal sides of the main positive and negative switch module, as well as the voltages of the positive electrode and the negative electrode and the voltage between the external sides of the main positive switch module and the main negative switch module, which are collected twice.

Detection circuit and method

The present application provides a high voltage detection circuit and method. The high voltage detection circuit includes a current adjustment module configured to be turned on or off to adjust a current in a high voltage circuit, a first detection module configured to provide a detection signal and transmit the detection signal to a processor module and the processor module configured to determine whether a master positive switch or a master negative switch is in malfunction according to a desired operation state of the master positive switch, a desired operation state of the master negative switch and the detection signal.

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Ningde, China

Yanhui Fu