Power conversion connector and vehicle

Abstract

The invention discloses an electricity conversion connector and a vehicle, the electricity conversion connector comprises a vehicle end electric connection device and a battery end electric connection device, the vehicle end electric connection device and the battery end electric connection device can form a cavity when coupled in place, the electricity conversion connector comprises a plurality of power branches and weak current branches, and the electricity conversion connector further comprises a current detection circuit, the current detection module is connected with the control module and comprises current detection modules which are arranged on a vehicle end electric connection device or a battery end electric connection device and are in one-to-one correspondence with the power branches; the power supply end and the output end of the current detection module are respectively connected with the weak current branch, and the current detection module is used for outputting detection signals and supplying power to the current detection module. The available space of the power conversion connector is fully utilized, the space of a whole vehicle distribution box or the space of a battery BDU does not need to be occupied, the current of a plurality of power branches can be collected at the same time to assist in judging the coupling condition of the high-voltage pole, pre-alarm information can be output in time when the current difference of the power branches is large, and the safety of a battery pack or a vehicle is guaranteed.

Description

Technical Field

[0001] The present application belongs to the field of battery replacement technology, and specifically relates to a battery replacement connector and a vehicle. Background Art

[0002] With the continuous development of new energy technologies, new energy vehicles are becoming more and more popular. Since the batteries of new energy vehicles are complex and high-power, it is necessary to collect and detect the current of the battery pack in real time to achieve accurate energy management.

[0003] Existing current detection often collects current information from a single branch or total circuit of the battery pack through a current detection device installed in the BDU or the vehicle's power distribution box, and then estimates the remaining power of the entire battery pack or the power consumption of the entire vehicle based on the single branch or total circuit current information.

[0004] Commercial battery-swap vehicles have large motor power and large power circuit current, so it is necessary to increase the number of high-voltage connectors or the number of power branches within a single battery-swap connector to meet operating conditions.

[0005] Since battery-swap vehicles need to couple the battery pack to the vehicle through a battery-swap connector, some power branches may not be coupled properly or there may be current deviations. The current detection device installed in the BDU or the vehicle's distribution box collects the current of a single branch or the total circuit. It is not only difficult to detect the current situation of each power branch, resulting in a decrease in the performance of the battery pack or even danger, but also causes the BDU or distribution box to occupy a larger space, reducing space utilization.

[0006] Therefore, how to collect the current information of battery-swap vehicles more reasonably and accurately has become a technical problem that needs to be solved urgently. Summary of the invention

[0007] The present application provides a battery swap connector to solve the above-mentioned technical problem of how to more reasonably and accurately collect the current information of the battery swap vehicle.

[0008] According to the first aspect, an embodiment of the present application provides a battery swap connector, which includes a vehicle-end electrical connection device and a battery-end electrical connection device. The vehicle-end electrical connection device and the battery-end electrical connection device can form a cavity when coupled in place. The power swap connector includes multiple power branches and weak-current branches. The power swap connector also includes: a current detection circuit, connected to a control module, including a current detection module arranged in the vehicle-end electrical connection device or in the battery-end electrical connection device and corresponding one-to-one to the power branch; the power supply end and the output end of the current detection module are respectively connected to the weak-current branch, for outputting a detection signal and powering the current detection module.

[0009] In the present scheme, since a cavity can be formed when the vehicle-end electrical connection device and the battery-end electrical connection device are coupled, the power exchange connector has available space. The cavity formed when the vehicle-end electrical connection device and the battery-end electrical connection device are coupled can accommodate multiple current measuring modules, and current detection can be performed on multiple power branches at the same time. Therefore, the current detection module is set in the vehicle-end electrical connection device or the battery-end electrical connection device, and the cavity formed when the vehicle-end electrical connection device and the battery-end electrical connection device are coupled is used as the accommodating space for multiple current detection modules, and the current of each power branch is detected separately. This not only makes full use of the available space of the power exchange connector without occupying the space of the vehicle's power distribution box or the battery BDU space, but also can collect the current of multiple power branches at the same time to assist in judging the coupling status of high-voltage poles, so as to achieve timely output of pre-alarm information when the current differences of multiple power branches are large, thereby ensuring the safety of the battery pack or the vehicle.

[0010] Optionally, the current detection module includes a Hall current sensor, which is fixedly mounted on the power branch in a one-to-one correspondence.

[0011] In this solution, Hall current sensors are used to collect current information of each power branch one by one, so as to realize current collection of each branch with higher precision. The different current values ​​of each branch of the connector at the same time can be used to assist in judging the coupling status of the high-voltage poles. When the current difference is large, an early warning alarm can be given to the whole vehicle.

[0012] Optionally, the power exchange connector also includes: a shielding device, which corresponds one-to-one to at least part of the current detection module, and is fixedly installed on the vehicle-end electrical connection device or the battery-end electrical connection device to shield interference from other power branches.

[0013] In this solution, since the current of the power branch is large and the distance between each power branch is small, there may be mutual influence. A shielding device is provided for the current detection module to shield the influence of the surrounding power branches on the current detection module of the current power branch.

[0014] Optionally, the current detection circuit further includes: a sensitivity adjustment module, connected to the control module, and configured to adjust the sensitivity of the current detection module based on a discharge instruction output by the control module.

[0015] In this solution, since the current of the power branch will change with the power demand, if the current detection device uses the same sensitivity, the current signal may be inaccurate when the current changes. The sensitivity adjustment module is used to adjust the sensitivity of the current detection device according to the real-time power demand to meet the problem of detection signal fluctuation or inaccuracy caused by the change of power branch current.

[0016] Optionally, the current detection circuit further includes an amplifier circuit arranged between the output end of the current detection module and the control module; the sensitivity adjustment module includes a first adjustment circuit connected to the feedback branch of the amplifier circuit, for adjusting the amplification factor of the amplifier circuit.

[0017] In this solution, in order to meet the current requirements of different electricity consumption, a first regulating circuit is used to adjust the amplification factor of the amplifier circuit. When the current is large, the amplification factor increases, and the sensitivity of the signal output by the current detection module increases accordingly. When the current is small, the amplification factor decreases, and the sensitivity of the signal output by the current detection module decreases accordingly to meet the sensitivity required for different currents.

[0018] Optionally, the first regulating circuit includes: a plurality of first regulating resistors and a first control switch connected in series or in parallel with the first regulating resistors, the control end of the first control switch is connected to the control module, and the resistance of the first regulating circuit is adjusted by disconnecting / conducting the first control switch to adjust the amplification factor of the amplifier circuit.

[0019] In this solution, the control module controls the first control switch to change the number of parallel or series resistors based on the required current value corresponding to the discharge instruction to achieve the purpose of adjusting the amplification factor, which can reliably and simply achieve the adjustment of the amplification factor.

[0020] Optionally, the sensitivity adjustment module further includes: a second adjustment circuit connected to the output end of the current detection circuit, for adjusting the sensitivity of the output signal of the current detection circuit.

[0021] In this solution, another method of adjusting the sensitivity of the current detection module by adjusting the sensitivity of the output signal is provided, so as to further adjust the sensitivity to meet the precise detection of various current values.

[0022] Optionally, the second regulation circuit includes a regulation capacitor and a second regulation resistor connected in parallel at the current output end, and a second control switch connected to the regulation capacitor and the second regulation resistor, the control end of the second control switch is connected to the control module, and the capacitance of the regulation capacitor and / or the resistance of the second regulation resistor are adjusted by disconnecting / conducting the second control switch to adjust the sensitivity of the output signal.

[0023] In this solution, the control module controls the second control switch to change the number of parallel or series resistors and capacitors based on the required current value corresponding to the discharge instruction to achieve the purpose of adjusting the sensitivity of the output signal, which can reliably and simply achieve sensitivity adjustment.

[0024] Optionally, the sensitivity adjustment module further includes a cavity temperature adjustment unit, which is disposed in the cavity and connected to the control module, and is used to adjust the temperature value in the cavity in response to the discharge instruction so as to adjust the sensitivity of the current detection module.

[0025] In this solution, the measurement sensitivity of the current detection module is adjusted by changing the temperature in the cavity, and the influence of the external environment on the sensitivity of the current detection module is used to directly adjust the measurement sensitivity of the current detection module.

[0026] Optionally, the control module includes a battery management unit or a vehicle controller.

[0027] In this solution, the detection signal output by the current detection module can be directly output to the battery management unit for battery remaining power calculation and battery balancing control, and can also be input to the vehicle controller to assist in determining whether the battery swap connector is coupled in place, or to provide an early warning when the current difference is large.

[0028] Optionally, the current detection module is connected to the control module via CAN communication.

[0029] In this solution, the current detection module transmits signals through CAN communication. The detection signal can be recorded synchronously with other vehicle data. It can collect multiple signals at the same time and provide the vehicle with richer data at the same time.

[0030] According to the second aspect, an embodiment of the present application provides a vehicle, comprising a battery replacement connector as described in any one of the first aspects above.

[0031] In this solution, the battery swap connector on the vehicle sets the current detection module on the vehicle-end electrical connection device or the battery-end electrical connection device, and uses the cavity formed when the vehicle-end electrical connection device and the battery-end electrical connection device are coupled as the accommodating space for multiple current detection modules, and detects the current of each power branch separately. It not only makes full use of the available space of the battery swap connector without occupying the space of the vehicle's power distribution box or the battery BDU space, but also can collect the current of multiple power branches at the same time to assist in judging the coupling status of high-voltage poles, so as to achieve timely output of pre-alarm information when the current differences of multiple power branches are large, thereby ensuring the safety of the battery pack or vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1is a schematic diagram of an optional power-swap connector structure according to an embodiment of the present application;

[0034] Figure 2 is a cross-sectional view of an optional power-swap connector according to an embodiment of the present application;

[0035] Figure 3 is a circuit schematic diagram of an optional current detection circuit according to an embodiment of the present application;

[0036] Figure 4A is a circuit schematic diagram of an optional first regulating circuit according to an embodiment of the present application;

[0037] Figure 4B is a circuit schematic diagram of another optional first regulating circuit according to an embodiment of the present application;

[0038] Figure 5A is a circuit schematic diagram of an optional second regulating circuit according to an embodiment of the present application;

[0039] Figure 5B is a circuit schematic diagram of another optional second regulating circuit according to an embodiment of the present application;

[0040] Figure 6 This is an optional current detection module communication schematic diagram according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0043] In addition, in this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0045] Therefore, according to one aspect of the embodiment of the present application, a power replacement connector 10 is provided, such as Figure 1 and Figure 2 As shown, the power exchange connector 10 includes a vehicle-end electrical connection device and a battery-end electrical connection device, and a cavity can be formed when the vehicle-end electrical connection device and the battery-end electrical connection device are coupled.

[0046] The power-swap connector includes multiple power branches 13, power supply branches and communication branches. The power-swap connector also includes: a current detection circuit connected to the control module, including a current detection module 14 arranged in the vehicle-end electrical connection device 11 or the battery-end electrical connection device 12 corresponding to the power branch 13; the power supply end and the output end of the current detection module 14 are respectively connected to the weak current branch 15, for outputting a detection signal and supplying power to the current detection module. Among them, the weak current branch 15 may include a power supply branch connection and a communication branch.

[0047] As an exemplary embodiment, since a cavity can be formed when the vehicle-end electrical connection device 11 and the battery-end electrical connection device 12 are coupled, the power exchange connector has available space. The cavity formed when the vehicle-end electrical connection device 11 and the battery-end electrical connection device 12 are coupled can accommodate multiple current measuring modules, and current detection can be performed on multiple power branches 13 at the same time. Therefore, in this embodiment, the current detection module 14 is set in the vehicle-end electrical connection device 11 or the battery-end electrical connection device 12, and the cavity formed when the vehicle-end electrical connection device 11 and the battery-end electrical connection device 12 are coupled is used as the accommodating space for multiple current detection modules 14, and the current of each power branch 13 is detected separately. This not only makes full use of the available space of the power exchange connector without occupying the space of the vehicle distribution box or the battery BDU space, but also can simultaneously collect the current of multiple power branches 13 to assist in judging the coupling status of the high-voltage poles, so that when the current difference of multiple power branches 13 is large, the pre-alarm information can be output in time to ensure the safety of the battery pack or the vehicle.

[0048] As an exemplary embodiment, a sealed cavity is formed after the vehicle-end electrical connection device 11 and the battery-end electrical connection device 12 are coupled in place, and the current detection device will be sealed in the sealed cavity after the vehicle-end electrical connection device 11 and the battery-end electrical connection device 12 are coupled in place, and the control module often needs to be arranged outside the power swap connector, and the sealing of the cavity can ensure the reliability of the power swap connector. Therefore, in order to ensure the sealing of the cavity, the power supply and signal transmission to the current detection device can be guaranteed while trying not to change the original structure of the power swap connector. In this embodiment, the communication branch and the power supply branch in the power swap connector can be reused to supply power and transmit signals to the current detection device.

[0049] As an exemplary embodiment, the current detection module 14 may include a Hall current sensor, a fluxgate current sensor, a resistor shunt, and other current detection modules 14. In this embodiment, the Hall current sensor may be used as an example for description.

[0050] In this embodiment, the Hall current sensors can be fixedly mounted on the power branches 13 one by one to detect the current state of each power branch 13 respectively. In this embodiment, the Hall current sensors with corresponding structures can be selected according to the specific structure of the power swap connector to adapt to the space between each power branch 13 in the power swap connector and the space of the power swap connector cavity.

[0051] As an exemplary embodiment, since the current of the power branch 13 is large and the spacing between the power branches 13 is small, there may be mutual influence. Therefore, in this embodiment, a shielding device can also be set for the current detection module 14 to shield the influence of the surrounding power branches 13 on the current detection module 14 of the current power branch 13. In this embodiment, the shielding device is fixedly installed on the vehicle-end electrical connection device 11 or the battery-end electrical connection device 12, sleeved on the outside of the current detection device, and corresponds to at least part of the current detection module 14 one by one. For example, a shielding device can be set for each power branch 13. If space permits, a shielding device can also be set for each current detection module 14 one by one.

[0052] In this embodiment, the shielding device can be made of non-magnetic metal material, for example, a copper mesh, copper sheet, etc., which is arranged between the current detection device and other power branches 13. As an optional embodiment, the shielding device can also be covered with an insulating layer to prevent short circuits in the power exchange connector.

[0053] Since the current of the power branch 13 will change with the power demand, when the power demand is large, the current of each power branch 13 is large, and the mutual influence may also be large; when the power demand is small, the current of each power branch 13 is small, and the mutual influence may be small; if the current detection device adopts the same sensitivity, the current signal may be inaccurately collected when the current changes. For example, when the sensitivity is high, it can meet the situation of small current and can output a more accurate detection signal, while in the case of large current, the detection signal output by the current detection device has a large noise, affecting the accuracy; if the sensitivity is low, it can meet the situation of large current, can reduce the influence of other power branches 13, and the output detection signal has a small noise; and in the case of small current, it may not be able to output an accurate detection signal, or even no detection signal is output. Therefore, in this embodiment, the sensitivity of the current detection device can be adjusted according to the real-time power demand through the sensitivity adjustment module. To meet the problem of fluctuation or inaccuracy of the detection signal caused by the change of the current of the power branch 13.

[0054] As an exemplary embodiment, the sensitivity adjustment module can be connected to the control module, which can be a battery management system or a vehicle controller. When the power demand changes, the corresponding discharge instruction will be output. The sensitivity adjustment module can adjust the sensitivity of the current detection module 14 based on the current value indicated by the discharge instruction; when the current is large, the sensitivity of the current detection module 14 is lowered, which can meet the detection of large currents and shield the influence of other power branches 13 through lower sensitivity. When the current is small, the sensitivity of the current detection module 14 is increased. Since the current is small, the influence of other power branches 13 is also small. Therefore, the high sensitivity is enough to meet the small current detection.

[0055] As an illustrative embodiment, see Figure 3 As shown, the current detection circuit also includes an amplifier circuit arranged between the output end of the current detection module 14 and the battery management system.

[0056] As an exemplary embodiment, the amplifier circuit may use an operational amplifier 16, the positive input terminal of the operational amplifier 16 is connected to the output terminal of the current detection module 14, and the reverse input terminal of the operational amplifier 16 is grounded through a first resistor R1. The output terminal of the amplifier circuit is connected to the control module, and a feedback branch is connected between the reverse input terminal and the output terminal.

[0057] As an exemplary embodiment, Figure 3 , Figure 4A and Figure 4BAs shown, the sensitivity adjustment module includes a first adjustment circuit 161 connected to the feedback branch of the amplifier circuit, which is used to adjust the amplification factor of the amplifier circuit. The first adjustment circuit may include a plurality of first adjustment resistors R2 and a first control switch Q1 connected in series or in parallel with the first adjustment resistor R2, wherein the control end of the first control switch Q1 is connected to the battery management system, and the resistance value of the first adjustment circuit 161 is adjusted by disconnecting / conducting the first control switch Q1 to adjust the amplification factor of the amplifier circuit.

[0058] As an exemplary embodiment, the amplification factor of the discharge circuit is:

[0059]

[0060] Wherein, R2 is the equivalent resistance value of the first regulating circuit 161 , R1 is the resistance value of the first resistor R1 , and N is the amplification factor.

[0061] As an exemplary embodiment, Figure 4A As shown, multiple first regulating resistors R2 are connected in series, and multiple first control switches Q1 are connected in parallel at least at two ends of some first regulating resistors R2. When the first control switch Q1 is turned on, the corresponding first regulating resistor R2 is short-circuited, the equivalent resistance value of the first regulating circuit 161 is reduced, and the amplification factor is reduced. When the amplification factor is reduced, the sensitivity of the signal output by the current detection module 14 is correspondingly reduced; when the first control switch Q1 is turned off, the corresponding first regulating resistor R2 is connected to the first regulating circuit 161, the equivalent resistance value of the first regulating circuit 161 is increased, and the amplification factor is increased. When the amplification factor is increased, the sensitivity of the signal output by the current detection module 14 is correspondingly increased. Thus, the sensitivity adjustment is achieved.

[0062] As an exemplary embodiment, Figure 4B As shown, multiple first regulating resistors R2 are in parallel relationship, multiple first control switches Q1 are connected in series one by one in the branch where at least part of the first regulating resistors R2 are located, when the first control switch Q1 is turned off, the corresponding first regulating resistor R2 cuts out the first regulating circuit 161, the parallel branches are reduced, the equivalent resistance value of the first regulating circuit 161 increases, and then the amplification factor increases. When the amplification factor increases, the sensitivity of the signal output by the current detection module 14 increases accordingly; when the first control switch Q1 is turned on, the corresponding first regulating resistor R2 is connected to the first regulating circuit 161, the parallel branches are increased, the equivalent resistance value of the first regulating circuit 161 decreases, and then the amplification factor decreases. When the amplification factor decreases, the sensitivity of the signal output by the current detection module 14 decreases accordingly. Thus, the sensitivity adjustment is achieved.

[0063] As an optional embodiment, the control end of the first control switch Q1 is connected to the control module, and the control module can control the disconnection or conduction of the first control switch Q1 based on the size of the required current or the current value indicated by the discharge instruction, so that the equivalent resistance of the first adjustment circuit 161 is adapted to the corresponding required current value, thereby adjusting the sensitivity of the current detection module 14 based on the required current value.

[0064] As an optional embodiment, Figure 3 As shown, the sensitivity adjustment module also includes: a second adjustment circuit 162 connected to the output end of the current detection circuit, which is used to adjust the sensitivity of the output signal of the current detection circuit. The second adjustment circuit 162 can be connected to the filter circuit at the output end of the current detection circuit. Exemplarily, the second adjustment circuit 162 can be a translation circuit that intercepts the voltage signal of the required voltage value in the current detection circuit to adjust the sensitivity.

[0065] As an exemplary embodiment, the second regulating circuit 162 includes a regulating capacitor C1 and a second regulating resistor R3 connected in parallel at the current output end, and a second control switch Q2 connected to the regulating capacitor C1 and the second regulating resistor R3, the control end of the second control switch Q2 is connected to the control module, and the capacitance of the regulating capacitor C1 and / or the resistance of the second regulating resistor R3 are adjusted by disconnecting / conducting the second control switch Q2 to adjust the sensitivity of the output signal.

[0066] In this embodiment, by reducing the equivalent capacitance of the adjustment capacitor C1 or reducing the equivalent resistance of the second adjustment resistor R3, the interception voltage value of the output signal can be reduced, thereby increasing the sensitivity of the output signal; by increasing the equivalent capacitance of the adjustment capacitor C1 or increasing the equivalent resistance of the second adjustment resistor R3, the interception voltage value of the output signal can be increased, thereby reducing the sensitivity of the output signal.

[0067] For example, Figure 5A As shown, there can be multiple regulating capacitors C1, and the multiple regulating capacitors C1 are in a series relationship. Multiple second control switches Q2 are connected in parallel at least at two ends of some regulating capacitors C1. When the second control switch Q2 is turned on, the corresponding regulating capacitor C1 is short-circuited, the equivalent capacitance value increases, and the intercept voltage value of the output signal is increased, thereby reducing the sensitivity of the output signal; when the second control switch Q2 is turned off, the corresponding regulating capacitor C1 is connected to the second regulating circuit 162, the equivalent capacitance value decreases, and the intercept voltage value of the output signal is reduced, thereby increasing the sensitivity of the output signal. Thus, the sensitivity adjustment is achieved.

[0068] The multiple second regulating resistors R3 are connected in series, and the multiple second control switches Q2 are connected in parallel at least at two ends of some of the second regulating resistors R3. When the second control switch Q2 is turned on, the corresponding second regulating resistor R3 is short-circuited, and the equivalent resistance value of the second regulating circuit 162 is reduced, which reduces the interception voltage value of the output signal, thereby increasing the sensitivity of the output signal. Thus, the sensitivity is adjusted; when the second control switch Q2 is turned off, the corresponding second regulating resistor R3 is connected to the second regulating circuit 162, and the equivalent resistance value of the second regulating circuit 162 is increased, which increases the interception voltage value of the output signal, thereby reducing the sensitivity of the output signal. Thus, the sensitivity is adjusted.

[0069] See also Figure 5B , as another optional connection mode of the second regulating circuit 162, a plurality of regulating capacitors C1 are connected in parallel, and a plurality of second regulating circuits 162 are connected in parallel;

[0070] The plurality of second regulating resistors R3 are connected in parallel, and the plurality of second control switches Q2 are connected in series one by one in the branch where at least part of the second regulating resistors R3 are located. When the second control switch Q2 is turned off, the corresponding second regulating resistor R3 cuts out the second regulating circuit 162, the parallel branch is reduced, the equivalent resistance value of the second regulating circuit 162 is increased, the interception voltage value of the output signal is increased, and the sensitivity of the output signal is reduced. Thus, the sensitivity adjustment is realized; when the second control switch Q2 is turned on, the corresponding second regulating resistor R3 is connected to the second regulating circuit 162, the parallel branch is increased, the equivalent resistance value of the second regulating circuit 162 is reduced, the interception voltage value of the output signal is reduced, and the sensitivity of the output signal is increased. Thus, the sensitivity adjustment is realized.

[0071] The multiple regulating capacitors C1 are connected in parallel, and the multiple second control switches Q2 are connected in series one by one in at least some branches of the regulating capacitors C1. When the second control switch Q2 is turned off, the corresponding regulating capacitor C1 is cut out of the second regulating circuit 162, the parallel branches are reduced, the equivalent capacitance of the second regulating circuit 162 is reduced, and the interception voltage value of the output signal is reduced, thereby increasing the sensitivity of the output signal; when the second control switch Q2 is turned on, the corresponding second regulating resistor R3 is connected to the second regulating circuit 162, the parallel branches are increased, the equivalent capacitance value of the second regulating circuit 162 is increased, the interception voltage value of the output signal is increased, and thereby reducing the sensitivity of the output signal. Thus, the sensitivity adjustment is achieved.

[0072] Of course, the regulating capacitor C1 and the second regulating resistor R3 in the second regulating circuit 162 are not limited to Figure 5A and Figure 5BFor example, multiple adjustment capacitors C1 are connected in series, multiple second adjustment resistors R3 are connected in parallel, or multiple adjustment capacitors C1 are connected in parallel, multiple second adjustment resistors R3 are connected in series, etc., all of which are applicable to the embodiments of the present application.

[0073] As another optional sensitivity adjustment method, the sensitivity measured by the current detection module 14 can be directly adjusted by utilizing the influence of the external environment on the sensitivity of the current detection module 14. The current detection module 14, such as the Hall current sensor, is sensitive to the ambient temperature. Generally, the higher the temperature, the lower its sensitivity. Therefore, the measurement sensitivity can be adjusted based on the ambient temperature of the current detection module 14.

[0074] In this embodiment, the sensitivity adjustment module also includes a cavity temperature adjustment unit, which is arranged in the cavity and connected to the control module, and is used to adjust the temperature value in the cavity in response to the discharge instruction to adjust the sensitivity of the current detection module 14. Since the current detection module 14 is placed in the cavity after the vehicle-end electrical connection device 11 and the battery-end electrical connection device 12 are coupled, the measurement sensitivity of the current detection module 14 can be adjusted by changing the temperature in the cavity. In this embodiment, the cavity temperature adjustment unit can be a heating device, such as a metal electric heating element or a non-metal electric heating element.

[0075] In this embodiment, the current detection module 14 often needs to be calibrated in advance based on the working temperature. For example, the average working temperature of the cavity of the power exchange connector can be collected to calibrate the current detection module 14. After the calibration is completed, the cavity temperature is adjusted according to the degree of influence of temperature on the sensitivity measured by the current detection module 14 and the current current value requirement. In this embodiment, when the current demand is large, the heating element can be started to heat the cavity to reduce the sensitivity of the current measurement module. When the current demand is small, heating is not required to increase or maintain the sensitivity of the current measurement module.

[0076] As an optional embodiment, the heating element may be started or not according to the actual temperature in the cavity so that the current detection device can be kept within a controllable temperature range, thereby providing a basic adjustment temperature for adjusting the sensitivity of the current detection module 14 .

[0077] As an exemplary embodiment, the current detection module 14 is connected to the control module via CAN communication, such as Figure 6As shown, in this embodiment, a Hall sensor with CAN communication function can be used, which is placed at the high-voltage pole of the battery replacement connector of the vehicle-end electrical connection device 11 to collect the branch current information required by the vehicle or the battery system BMS, and the Hall sensor is powered by the low-voltage power supply line inside the connector, and the sensor signal is output through an independent CAN bus. In this embodiment, dual CAN bus output can be used, the positive output end of the current detection module 14 is connected to CAN1, and the negative output end of the current detection module 14 is connected to CAN2.

[0078] The present application also provides a vehicle that adopts the battery replacement connector described in the above embodiment.

[0079] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0080] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0081] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A power-swapping connector, comprising a vehicle-end electrical connection device and a battery-end electrical connection device, wherein the vehicle-end electrical connection device and the battery-end electrical connection device can form a cavity when coupled in place, and the power-swapping connector comprises a plurality of power branches and weak current branches, characterized in that: The power exchange connector further includes: a current detection circuit connected to the control module, including a current detection module arranged in the vehicle-end electrical connection device or the battery-end electrical connection device and corresponding to the power branch one by one; The power supply end and the output end of the current detection module are respectively connected to the weak current branch, and are used to output a detection signal and supply power to the current detection module.

2. The power replacement connector according to claim 1, characterized in that: The current detection module includes a Hall current sensor, which is fixedly mounted on the power branch in a one-to-one correspondence.

3. The power replacement connector according to claim 2, characterized in that: Also includes: The shielding device corresponds to at least part of the current detection modules one by one, is fixedly installed on the vehicle-end electrical connection device or the battery-end electrical connection device, and is used to shield interference from other power branches.

4. The power replacement connector according to claim 1, characterized in that: The current detection circuit also includes: A sensitivity adjustment module is connected to the control module and is used to adjust the sensitivity of the current detection module based on the discharge instruction output by the control module.

5. The power replacement connector according to claim 4, characterized in that: The current detection circuit also includes an amplifier circuit arranged between the output end of the current detection module and the control module; The sensitivity adjustment module comprises: a first regulating circuit connected to the feedback branch of the amplifier circuit, used for adjusting the amplification factor of the amplifier circuit; and / or; The second regulating circuit connected to the output end of the current detection circuit is used to adjust the sensitivity of the output signal of the current detection circuit.

6. The power replacement connector according to claim 5, characterized in that: The first regulating circuit includes: a plurality of first regulating resistors and a first control switch connected in series or in parallel with the first regulating resistors, wherein the control end of the first control switch is connected to the control module, and the resistance value of the first regulating circuit is adjusted by disconnecting / conducting the first control switch to adjust the amplification factor of the amplifier circuit.

7. The power replacement connector according to claim 5, characterized in that: The second regulating circuit includes a regulating capacitor and a second regulating resistor connected in parallel at the current output end, and a second control switch connected to the regulating capacitor and the second regulating resistor. The control end of the second control switch is connected to the control module. The capacitance of the regulating capacitor and / or the resistance of the second regulating resistor are adjusted by disconnecting / conducting the second control switch to adjust the sensitivity of the output signal.

8. The power replacement connector according to claim 4, characterized in that: The sensitivity adjustment module further includes a cavity temperature adjustment unit, which is disposed in the cavity and connected to the control module, and is used for adjusting the temperature value in the cavity in response to the discharge instruction so as to adjust the sensitivity of the current detection module.

9. The power replacement connector according to claim 1, characterized in that: The control module includes a battery management unit or a vehicle controller; And / or, the current detection module is connected to the control module via CAN communication.

10. A vehicle, characterized in that: Including the power replacement connector according to any one of claims 1-9.

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