Diverter, power supply circuit, battery pack and electric equipment

Abstract

The utility model relates to a shunt, a power supply circuit, a battery pack and electric equipment. The shunt comprises a current-conducting plate and a sampling circuit module. The sampling circuit module is fixedly connected to the current-conducting plate, and the sampling circuit module is provided with a communication port; and the sampling circuit module is used for collecting current through the conductive plate and outputting the current through the communication port. Thus, the current-conducting plate and the sampling circuit module are arranged on the diverter, the communication port is formed in the sampling circuit module, the diverter can be directly connected with a battery management system through the communication port, the use convenience of the diverter can be effectively improved, the sampling circuit module is integrated on the current-conducting plate, and a new diverter is formed. According to the invention, other auxiliary units can be effectively prevented from being introduced while the diverter is used, so that the vehicle space can be effectively saved, and the utilization rate of the vehicle space can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power supply, and particularly, to a shunt, a power supply circuit, a battery pack, and an electrical device. Background Art

[0002] Vehicles usually control the power supply of the vehicle by collecting the output current of the battery in the battery management system. Improving the accuracy of current collection can effectively improve the power supply reliability, effectively extend the service life of the battery, increase the cruising range and driving safety of the vehicle. Hall sensors are easily affected by the environment, reducing the accuracy of current collection. Existing shunts need to collect current with the assistance of an HVSU (High Voltage Safety Unit) and send the collected current to the battery management system. Summary of the Utility Model

[0003] To achieve the above object, the present disclosure provides a shunt, a power supply circuit, a battery pack, and an electrical device.

[0004] The first aspect of the present disclosure provides a shunt, including: a conductive plate and a sampling circuit module;

[0005] The sampling circuit module is fixedly connected to the conductive plate, and a communication port is provided on the sampling circuit module;

[0006] The sampling circuit module is configured to collect current through the conductive plate and output the current through the communication port.

[0007] Optionally, the conductive plate includes a first input terminal and a second input terminal, and the first input terminal and the second input terminal are used to connect to an external circuit to collect the current in the external circuit.

[0008] The second aspect of the present disclosure provides a power supply circuit, including a first detection component, a second detection component, a first switch branch, a second switch branch, and a load interface, where the load interface is used to connect to a load,

[0009] The first detection component is connected to the first end of the load interface through the first switch branch, and the second detection component is connected to the second end of the load interface through the second switch branch;

[0010] At least one of the first detection component and the second detection component includes the shunt as described in the first aspect of the present disclosure;

[0011] The first detection component is configured to collect a first current of the first switch branch;

[0012] The second detection component is configured to collect a second current of the second switch branch.

[0013] Optionally, the power supply circuit further includes: a third switch branch, the third switch branch being connected in parallel across the two ends of the first switch branch, and the first detection component is further configured to collect a third current of the third switch branch; or,

[0014] The third switch branch is connected in parallel across the two ends of the second switch branch, and the second detection component is further configured to collect a fourth current of the third switch branch.

[0015] Optionally, the power supply circuit further includes: a controller, the controller being respectively connected to the first detection component, the second detection component, the first switch branch and the second switch branch, and configured to obtain the first current collected by the first detection component and the second current collected by the second detection component, and based on the first current collected by the first detection component and the second current collected by the second detection component, control the conduction or disconnection of the first switch branch and the second switch branch.

[0016] Optionally, the controller is further connected to the third switch branch, and configured to obtain the third current collected by the first detection component or the fourth current collected by the second detection component, and based on the third current collected by the first detection component or the fourth current collected by the second detection component, control the conduction or disconnection of the third switch branch.

[0017] Optionally, the first switch branch includes: a first switch component; a first end of the first switch component is connected to the first detection component, and a second end of the first switch component is connected to a first end of the load interface.

[0018] Optionally, the controller is connected to the first switch component, and configured to make the first switch branch conduct by controlling the closing of the first switch component.

[0019] Optionally, the second switch branch includes: a second switch component; a first end of the second switch component is connected to the second detection component, and a second end of the second switch component is connected to a second end of the load interface.

[0020] Optionally, the controller is connected to the second switch component, and configured to make the second switch branch conduct by controlling the closing of the second switch component.

[0021] Optionally, the third switch branch includes: a third switch component and a first resistor; the third switch component is connected in series with the first resistor.

[0022] Optionally, the controller is connected to the third switch component and is configured to control the third switch component to disconnect based on the third current collected by the first detection component or the fourth current collected by the second detection component, so as to disconnect the third switch branch.

[0023] Optionally, the load interface includes a front-end interface and a rear-end interface, the load includes a front-end load and a rear-end load, the front-end interface is used to connect the front-end load, and the rear-end interface is used to connect the rear-end load;

[0024] The first end of the front-end interface is connected to the first end of the first switch branch and the first end of the rear-end interface, and the second end of the front-end interface is connected to the second end of the second switch branch and the second end of the rear-end interface.

[0025] Optionally, the power supply circuit further includes a charging interface, and the charging interface is used to connect a charging device;

[0026] The first end of the charging interface is connected to the first detection component through the first switch branch, and the second end of the charging interface is connected to the second detection component through the second switch branch.

[0027] Optionally, the power supply circuit further includes: a fourth switch branch and a fifth switch branch;

[0028] The first end of the fourth switch branch is connected to the first end of the fifth switch branch and the first end of the load interface, and the second end of the fourth switch branch is connected to the second end of the fifth switch branch and the first end of the charging interface.

[0029] Optionally, the first detection component is further configured to collect a fifth current of the third switch branch, and the second detection component is further configured to collect a sixth current of the third switch branch;

[0030] The controller is respectively connected to the fourth switch branch and the fifth switch branch, and is configured to control the conduction of the second switch branch, the third switch branch and the fourth switch branch, obtain the fifth current collected by the first detection component, and based on the fifth current collected by the first detection component, control the disconnection of the third switch branch and the fourth switch branch and the conduction of the first switch branch and the fifth switch branch; or control the conduction of the first switch branch, the third switch branch and the fourth switch branch, obtain the sixth current collected by the second detection component, and based on the sixth current collected by the second detection component, control the disconnection of the third switch branch and the fourth switch branch and the conduction of the second switch branch and the fifth switch branch.

[0031] Optionally, the fourth switch branch includes a fourth switch component and a second resistor; the fourth switch component is connected in series with the second resistor.

[0032] Optionally, the fifth switch branch includes a fifth switch component; the fifth switch component is connected in parallel with the fourth switch branch.

[0033] Optionally, the power supply circuit further includes a sixth switch component; a first end of the sixth switch component is connected to a second end of the load interface, and a second end of the sixth switch component is connected to a second end of the charging interface and the second detection component.

[0034] Optionally, the first detection component includes the shunt; the shunt is connected to a first end of the load interface through the first switch branch;

[0035] The second detection component includes a Hall sensor; the Hall sensor is connected to a second end of the load interface through the second switch branch.

[0036] A third aspect of the present disclosure provides a battery pack, including the power supply circuit provided in any one of the second aspects of the present disclosure above.

[0037] Optionally, it further includes a first housing, a second housing, a tray and a battery;

[0038] The controller, the battery, the load interface and the first housing are fixed on the tray; the second housing and the first housing form a receiving cavity;

[0039] The first switch branch, the second switch branch and the third switch branch are located in the receiving cavity and fixed on the second housing.

[0040] A fourth aspect of the present disclosure provides an electrical device, which includes the battery pack described in the third aspect of the present disclosure above, or includes the power supply circuit described in any one of the second aspects of the present disclosure above.

[0041] Through the above technical solutions, by providing a conductive plate and a sampling circuit module on the shunt, and providing a communication port on the sampling circuit module, it can be directly connected to the battery management system through the communication port, effectively improving the convenience of using the shunt, and integrating the sampling circuit module on the conductive plate to form a new shunt, which can effectively avoid introducing other auxiliary units while using the shunt, thereby effectively saving the space of the electrical device, and further improving the utilization rate of the space of the electrical device.

[0042] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the accompanying drawings:

[0044] Figure 1 is a schematic diagram of a shunt shown according to an exemplary embodiment;

[0045] Figure 2 is a schematic diagram of a power supply circuit shown according to an exemplary embodiment;

[0046] Figure 3 is according to Figure 2 the power supply circuit schematic diagram shown in the illustrated embodiment;

[0047] Figure 4 is according to Figure 3 the power supply circuit schematic diagram shown in the illustrated embodiment;

[0048] Figure 5 is according to Figure 4 the power supply circuit schematic diagram shown in the illustrated embodiment;

[0049] Figure 6 is a block diagram of a battery pack shown according to an exemplary embodiment;

[0050] Figure 7 is a schematic diagram of a battery pack shown according to an exemplary embodiment;

[0051] Figure 8 is according to Figure 7 the A - A cross - sectional view of a battery pack shown in the illustrated embodiment;

[0052] Description of reference numerals

[0053] 101 Conductive plate 102 Sampling circuit module

[0054] 1021 Communication port 201 First detection component

[0055] 202 Second detection component 203 First switch branch

[0056] 204 Second switch branch 205 Load interface

[0057] 206 Controller 207 Third switch branch

[0058] 208 Charging interface 209 Fourth switch branch

[0059] 210 Fifth switch branch Q1 First switch component

[0060] Q2 Second switch component Q3 Third switch component

[0061] Q4 Fourth switch component Q5 Fifth switch component

[0062] Q6 Sixth switch component R1 First resistor

[0063] R2 Second resistor 1 First housing

[0064] 2 Second housing 3 Tray

[0065] 4 Battery 5 Accommodating cavity Detailed implementation manners

[0066] The following details the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for explaining and interpreting the present disclosure, and are not used to limit the present disclosure.

[0067] Before introducing the specific implementation manners of the present disclosure in detail, first, the application scenario of the present disclosure is described. The present disclosure is applied to a battery management system. Before the battery in a vehicle powers the electrical devices in the vehicle, it is necessary to detect the power supply circuit in the battery management system to determine whether the conduction state of the power supply circuit is normal to determine whether to power on the vehicle. Hall sensors are easily affected by the environment and have the problem of zero-point drift, resulting in poor stability and low accuracy of the collected current. Existing shunt resistors need to assist in collecting current through an HVSU (High Voltage Safety Unit) and send the collected current to the battery management system.

[0068] To solve the above technical problems, the present disclosure provides a shunt resistor, a power supply circuit, a battery pack, and an electrical device. The shunt resistor includes: a conductive plate and a sampling circuit module; the sampling circuit module is fixedly connected to the conductive plate, and a communication port is provided on the sampling circuit module; the sampling circuit module is configured to collect current through the conductive plate and output the current through the communication port. In this way, by providing a conductive plate and a sampling circuit module on the shunt resistor, and a communication port on the sampling circuit module, it can be directly connected to the battery management system through the communication port, effectively improving the convenience of using the shunt resistor. And integrating the sampling circuit module on the conductive plate to form a new shunt resistor can effectively avoid introducing other auxiliary units when using the shunt resistor, thereby effectively saving vehicle space and further improving the utilization rate of vehicle space.

[0069] Figure 1 is a schematic diagram of a shunt resistor shown according to an exemplary embodiment, as Figure 1As shown, the shunt can include: a conductive plate 101 and a sampling circuit module 102; the sampling circuit module 102 can be fixedly connected to the conductive plate 101, and a communication port 1021 can be provided on the sampling circuit module 102; the sampling circuit module 102 can be used to collect current through the conductive plate 101 and output the current through the communication port 1021.

[0070] Wherein, the conductive plate 101 can include a first input end and a second input end, and the first input end and the second input end are used to connect to an external circuit to collect the current in the external circuit. The sampling circuit module 102 can be connected to a controller of the external circuit through the communication port 1021. The conductive plate 101 can further include a sampling end, and the sampling circuit module 102 can be connected to the conductive plate 101 through the sampling end. The conductive plate 101 is connected to the external circuit through the first input end and the second input end to shunt the current of the external circuit. The sampling circuit module 102 can collect the current of the external circuit by collecting the shunted current on the conductive plate 101 and send the current to the controller of the external circuit through the communication port 1021.

[0071] It should be noted that the sampling circuit module 102 can be fixedly connected to the conductive plate 101 by welding (for example, soldering or ultrasonic welding). The sampling circuit module 102 can be a PCB (Printed Circuit Board) board or an FPC (Flexible Printed Circuit Board) board. The structure of the conductive plate 101 is prior art in the field, and the present disclosure will not describe it in detail.

[0072] In the above technical solution, by providing a conductive plate and a sampling circuit module on the shunt, and providing a communication port on the sampling circuit module, it can be directly connected to the battery management system through the communication port, which can effectively improve the convenience of using the shunt. And integrating the sampling circuit module on the conductive plate to form a new shunt can effectively avoid introducing other auxiliary units when using the shunt, thereby effectively saving the vehicle space and further improving the utilization rate of the vehicle space.

[0073] Figure 2 is a schematic diagram of a power supply circuit shown according to an exemplary embodiment, as Figure 2As shown, the power supply circuit may include a first detection component 201, a second detection component 202, a first switch branch 203, a second switch branch 204, and a load interface 205. The load interface 205 is used to connect to a load. The first detection component 201 is connected to the first end of the load interface 205 through the first switch branch 203, and the second detection component 202 is connected to the second end of the load interface 205 through the second switch branch 204. At least one of the first detection component 201 and the second detection component 202 includes a shunt as described above Figure 1 The first detection component 201 is configured to collect a first current of the first switch branch 203. The second detection component 202 is configured to collect a first current of the second switch branch 204.

[0074] Wherein, the first detection component 201 may include the shunt, and the shunt is connected to the first end of the load interface 205 through the first switch branch 203. The second detection component 202 includes a Hall sensor, and the Hall sensor is connected to the second end of the load interface 205 through the second switch branch 204.

[0075] It should be noted that the power supply circuit may further include a power supply terminal for connecting to a vehicle battery. The shunt is connected to the power supply terminal through a first input terminal and is connected to the first switch branch 203 or the second switch branch 204 through a second input terminal. By connecting the shunt into the power supply circuit, the shunt can collect the first current of the first switch branch 203 or the second current of the second switch branch 204 by sampling the current after shunting on the conductive plate through a sampling circuit module.

[0076] Exemplarily, in the case where the first detection component 201 includes the shunt as described above Figure 1 The first input terminal of the shunt is connected to the power supply terminal, the second input terminal of the shunt is connected to the first end of the first switch branch 203, the second end of the first switch branch 203 is connected to the first end of the load interface 205, and the shunt collects the first current of the first switch branch 203. In the case where the second detection component 202 includes the shunt as described above Figure 1 The first input terminal of the shunt is connected to the power supply terminal, the second input terminal of the shunt is connected to the first end of the second switch branch 204, the second end of the second switch branch 204 is connected to the second end of the load interface 205, and the shunt collects the second current of the second switch branch 204.

[0077] It should also be noted that when the vehicle is two-wheel drive, the load interface 205 can be a front-wheel drive interface or a rear-wheel drive interface. When the first switch branch 203 and the second switch branch 204 are turned on, power is supplied to the vehicle load through the front-wheel drive interface or the rear-wheel drive interface. When the vehicle is four-wheel drive, the load interface 205 includes a front-wheel drive interface and a rear-wheel drive interface. The load includes a front-wheel drive load (such as a front differential, a front motor, etc.) and a rear-wheel drive load (such as a rear differential, a rear motor, etc.). The front-wheel drive interface is used to connect the front-wheel drive load, and the rear-wheel drive interface is used to connect the rear-wheel drive load. The first end of the front-wheel drive interface is connected to the first end of the first switch branch 203 and the first end of the rear-wheel drive interface. The second end of the front-wheel drive interface is connected to the second end of the second switch branch 204 and the second end of the rear-wheel drive interface. When the first switch branch 203 and the second switch branch 204 are turned on, power is supplied to the vehicle front-wheel drive load through the front-wheel drive interface, and power is supplied to the vehicle rear-wheel drive load through the rear-wheel drive interface.

[0078] Optionally, still taking Figure 2 as shown, the power supply circuit may further include: a controller 206, which is respectively connected to the first detection component 201, the second detection component 202, the first switch branch 203 and the second switch branch 204, and is used to obtain the first current collected by the first detection component 201 and the second current collected by the second detection component 202, and based on the first current collected by the first detection component 201 and the second current collected by the second detection component 202, control the conduction or disconnection of the first switch branch 203 and the second switch branch 204.

[0079] Among them, the controller 206 can be a BMS (Battery Management System), or a BMC (Battery Management Control), a BMU (Battery Management Unit) or an HVSU (High Voltage Supervise Unit) in the BMS system.

[0080] It should be noted that the controller 206 can control the first switch branch 203 and the second switch branch 204 to conduct when receiving the power-on instruction of the vehicle, so that the power supply circuit supplies power to the vehicle load. The controller 206 can control the conduction or disconnection of the first switch branch 203 and the second switch branch 204 by obtaining the first current collected by the first detection component 201 and the second current collected by the second detection component 202, and can also control the first switch branch 203 and the second switch branch 204 to disconnect when receiving the power-off instruction of the vehicle, so that the power supply circuit stops supplying power to the vehicle load.

[0081] Exemplarily, the controller 206 can keep the first switch branch 203 and the second switch branch 204 conducting when determining that both the first current collected by the first detection component 201 and the second current collected by the second detection component 202 are within the specified current range, and can control the first switch branch 203 and the second switch branch 204 to disconnect when determining that the average value of the first current and the second current is greater than the specified current threshold.

[0082] In the above technical solution, by simultaneously collecting the current in the power supply circuit through the first detection component and the second detection component, the accuracy of current collection in the power supply circuit can be effectively improved, and the power supply state of the power supply circuit can be controlled according to the first detection current collected by the first detection component and the second detection current collected by the second detection component, so that the power supply reliability of the power supply circuit can be effectively improved.

[0083] Figure 3 is based on Figure 2 The schematic diagram of a power supply circuit shown in the illustrated embodiment is as Figure 3 shown. The power supply circuit may further include: a third switch branch 207, the third switch branch 207 may be connected in parallel across the first switch branch 203, and the first detection component 201 is further configured to collect the third current of the third switch branch 207; or, the third switch branch 207 may be connected in parallel across the second switch branch 204, and the second detection component 202 is further configured to collect the fourth current of the third switch branch 207.

[0084] Wherein, the controller 206 may also be connected to the third switch branch 207, configured to obtain the third current collected by the first detection component 201 or the fourth current collected by the second detection component 202, and control the conduction or disconnection of the third switch branch 207 based on the third current collected by the first detection component 201 or the fourth current collected by the second detection component 202.

[0085] It should be noted that when the controller 206 receives the power-on instruction of the vehicle, it controls the second switch branch 204 and the third switch branch 207 to conduct, so as to form a pre-power supply path between the second switch branch 204, the third switch branch 207 and the vehicle load. The pre-power supply path can be understood as a power supply path that provides a preset current range to the vehicle load. The preset current range is a current range smaller than the rated current range of the vehicle load. For example, the rated current range of the vehicle load can be 65A - 70A, and the preset current range can be 25A - 35A, 30A - 40A or 38A - 50A, etc. After the third switch branch 207 conducts, the controller 206 determines that the third current or the fourth current is within the preset current range based on the third current of the third switch branch 207 collected by the first detection component 201 or the fourth current of the third switch branch 207 collected by the second detection component 202, and controls the first switch branch 203 to conduct and the third switch branch 207 to disconnect, so that the power supply circuit supplies power to the vehicle load normally. Normal power supply can be understood as the power supply circuit providing a current within the rated current range of the vehicle load.

[0086] In the above technical solution, by simultaneously collecting the current in the power supply circuit through the first detection component and the second detection component, the accuracy of current collection in the power supply circuit can be effectively improved, and the power supply state of the power supply circuit can be controlled according to the first detection current collected by the first detection component and the second detection current collected by the second detection component, thereby effectively improving the power supply reliability of the power supply circuit.

[0087] Figure 4 is based on Figure 3 A schematic diagram of a power supply circuit shown in the illustrated embodiment is as Figure 4 shown. The first switch branch 203 may include: a first switch component Q1; the first end of the first switch component Q1 may be connected to the first detection component 201, and the second end of the first switch component Q1 may be connected to the first end of the load interface 205.

[0088] Among them, the controller 206 may be connected to the first switch component Q1 and is used to control the first switch component Q1 to close to make the first switch branch 203 conduct. The first switch component Q1 may be a relay, or may also be a contactor, IGBT (Insulated Gate Bipolar Transistor), BJT (Bipolar Junction Transistors) or MOS (Metal - Oxide - Semiconductor Field - Effect Transistor) tube, etc.

[0089] It should be noted that the controller 206 can control the first switch component Q1 to close when receiving the power-on instruction of the vehicle, so that the first switch branch 203 is turned on. When receiving the power-off instruction of the vehicle, the controller 206 can control the first switch component Q1 to open, so that the first switch branch 203 is turned off. The controller 206 can also control the first switch component Q1 to open by the first current of the first switch branch 203 collected by the first detection component 201.

[0090] Exemplarily, when the controller 206 determines that the first current of the first switch branch 203 collected by the first detection component 201 is greater than the preset current threshold, the controller 206 controls the first switch component Q1 to open, so that the first switch branch 203 is turned off.

[0091] Optionally, still taking Figure 4 as an example, the second switch branch 204 may include: a second switch component Q2; the first end of the second switch component Q2 may be connected to the second detection component 202, and the second end of the second switch component Q2 may be connected to the second end of the load interface 205.

[0092] Among them, the controller 206 can be connected to the second switch component Q2, and is used to control the second switch component Q2 to close, so that the second switch branch 204 is turned on. The second switch component Q2 can be a relay, and can also be a contactor, IGBT, BJT or MOS transistor, etc.

[0093] It should be noted that the controller 206 can control the second switch component Q2 to close when receiving the power-on instruction of the vehicle, so that the second switch branch 204 is turned on. When receiving the power-off instruction of the vehicle, the controller 206 can control the second switch component Q2 to open, so that the second switch branch 204 is turned off. The controller 206 can also control the second switch component Q2 to open by the second current of the second switch branch 204 collected by the second detection component 202.

[0094] Exemplarily, when the controller 206 determines that the second current of the second switch branch 204 collected by the second detection component 202 is greater than the preset current threshold, the controller 206 controls the second switch component Q2 to open, so that the second switch branch 204 is turned off.

[0095] Optionally, still taking Figure 4 as an example, the third switch branch 207 may include: a third switch component Q3 and a first resistor R1; the third switch component Q3 may be connected in series with the first resistor R1.

[0096] Among them, the third switch component Q3 can be a relay, or can also be a contactor, IGBT, BJT, MOS transistor, etc. The controller 206 can be connected to the third switch component Q3, and is used to control the closing or opening of the third switch component Q3 based on the third current collected by the first detection component 201 or the fourth current collected by the second detection component 202, so that the third switch branch 207 is conducted or disconnected.

[0097] It should be noted that when the controller 206 receives the power-on instruction of the vehicle, it controls the second switch component Q2 and the third switch component Q3 to close, and the second switch branch 204 and the third switch branch 207 are conducted, so as to form a pre-power supply path between the second switch branch 204, the third switch branch 207 and the vehicle load. Through the voltage division effect of the first resistor R1 in the third switch branch 207, it is possible to avoid excessive current at the moment of conduction in the power supply circuit and damage the vehicle load. After the third switch branch 207 is conducted, the controller 206 can determine that the third current or the fourth current is within the preset current range through the third current of the first detection component 201 or the fourth current collected by the second detection component 202, and control the first switch component Q1 to close and the third switch component Q3 to open, so that the first switch branch 203 is conducted and the third switch branch 207 is disconnected, and the power supply circuit can supply power to the vehicle load normally. Normal power supply can be understood as that the power supply circuit provides a current within the rated current range of the vehicle load to the vehicle load.

[0098] Exemplarily, the controller 206 can be a BMS, the first detection component 201 can be a shunt, the second detection component 202 can be a Hall sensor. The BMS can be connected to the Hall sensor and connected to the shunt through a communication port. The power supply terminal is connected to the first input terminal of the shunt and the first terminal of the Hall sensor. The second input terminal of the shunt is connected to the first terminal of the first switch component Q1 and the first terminal of the third switch component Q3. The second terminal of the third switch component Q3 is connected to the first terminal of the first resistor R1. The second terminal of the first switch component Q1 is connected to the second terminal of the first resistor R1 and the first terminal of the load interface 205. The second terminal of the Hall sensor is connected to the first terminal of the second switch component Q2. The second terminal of the second switch component Q2 is connected to the second terminal of the load interface 205. The BMS can receive the third current of the first switch branch 203 collected by the shunt, and when it is determined that the third current is within the preset current range, control the third switch component Q3 to open and the first switch component Q1 to close, so that the first switch branch 203 is conducted and the third switch branch 207 is disconnected, and the power supply circuit can supply power to the vehicle load normally.

[0099] In the above technical solution, the current in the power supply circuit is collected simultaneously by the first detection component and the second detection component, which can effectively improve the accuracy of current collection in the power supply circuit, and can control the power supply state of the power supply circuit according to the first detection current collected by the first detection component and the second detection current collected by the second detection component, thereby effectively improving the power supply reliability of the power supply circuit.

[0100] Figure 5 is based on Figure 4 A schematic diagram of a power supply circuit shown in the illustrated embodiment is as Figure 5 shown. The power supply circuit may further include a charging interface 208, which is used to connect a charging device; the first end of the charging interface 208 is connected to the first detection component 201 through the first switch branch 203, and the second end of the charging interface 208 is connected to the second detection component 202 through the second switch branch 204.

[0101] Among them, the charging interface 208 can be a slow charging interface or a fast charging interface.

[0102] Exemplarily, referring to the above example, the first end of the charging interface 208 is connected to the first end of the load interface 205, the second end of the first switch component Q1, and the second end of the third switch component Q3. The second end of the charging interface 208 is connected to the second end of the second switch component Q2. When the controller 206 receives a charging instruction, it controls the second switch component Q2 and the third switch component Q3 to close, so that the second switch branch 204 and the third switch branch 207 are turned on, and the charging device pre-charges the vehicle battery. Through the third current collected by the first detection component 201 and the second current collected by the second detection component 202, it controls the third switch component Q3 to disconnect and the first switch component Q1 to close, so that the first switch branch 203 is turned on, and the charging device charges the vehicle battery.

[0103] Optionally, still taking Figure 5 as an example, the power supply circuit further includes: a fourth switch branch 209 and a fifth switch branch 210;

[0104] The first end of the fourth switch branch 209 is connected to the first end of the fifth switch branch 210 and the first end of the load interface 205, and the second end of the fourth switch branch 209 is connected to the second end of the fifth switch branch 210 and the first end of the charging interface 208.

[0105] Among them, the fourth switch branch 209 includes a fourth switch component Q4 and a second resistor R2; the fourth switch component Q4 is connected in series with the second resistor R2. The fifth switch branch 210 includes a fifth switch component Q5; the fifth switch component Q5 is connected in parallel with the fourth switch branch 209. The fourth switch component Q4 can be a relay, or can also be a contactor, IGBT, BJT, MOS transistor, etc. The fifth switch component Q5 can be a relay, or can also be a contactor, IGBT, BJT, MOS transistor, etc.

[0106] It should be noted that the first end of the second resistor R2 is connected to the first end of the load interface 205, the second end of the first switch component Q1, the second end of the second switch component Q2, and the first end of the fifth switch component Q5. The second end of the second resistor R2 is connected to the first end of the fourth switch component Q4. The second end of the fourth switch component Q4 is connected to the first end of the charging interface 208 and the second end of the fifth switch component Q5. The controller 206 controls the fourth switch component Q4 to close to make the fourth switch branch 209 conduct, and controls the fifth switch component to close to make the fifth switch branch conduct.

[0107] Optionally, still taking Figure 5 as an example, the first detection component 201 is further configured to collect a fifth current of the third switch branch 207, and the second detection component 202 is further configured to collect a sixth current of the third switch branch 207; the controller 206 is respectively connected to the fourth switch branch 209 and the fifth switch branch 210, and is configured to control the second switch branch 204, the third switch branch 207, and the fourth switch branch 209 to conduct, obtain the fifth current collected by the first detection component 201, and based on the fifth current collected by the first detection component 201, control the third switch branch 207 and the fourth switch branch 209 to disconnect, and the first switch branch 203 and the fifth switch branch 210 to conduct; or control the first switch branch 203, the third switch branch 207, and the fourth switch branch 209 to conduct, obtain the sixth current collected by the second detection component 202, and based on the sixth current collected by the second detection component 202, control the third switch branch 207 and the fourth switch branch 209 to disconnect, and the second switch branch 204 and the fifth switch branch 210 to conduct.

[0108] Exemplarily, referring to the above example, the first end of the fourth switch branch 209 is connected to the first end of the load interface 205, the second end of the first switch component Q1, the second end of the third switch component Q3, and the first end of the fifth switch branch 210. The second end of the fourth switch branch 209 is connected to the first end of the charging interface 208 and the second end of the fifth switch branch 210. When the controller 206 receives a charging instruction, it controls the second switch component Q2, the third switch component Q3, and the fourth switch component Q4 to close, so that the second switch branch 204, the third switch branch 207, and the fourth switch branch 209 are conducted, and the charging device pre-charges the vehicle battery. Based on the third current collected by the first detection component 201 and the second current collected by the second detection component 202, it controls the third switch component Q3 and the fourth switch component Q4 to disconnect, and the first switch component Q1 and the fifth switch component Q5 to close, so that the third switch branch 207 and the fourth switch branch 209 are disconnected, and the first switch branch 203 and the fifth switch branch 210 are conducted, and the charging device charges the vehicle battery.

[0109] Optionally, still taking Figure 5 as an example, the power supply circuit further includes a sixth switch component Q6; the first end of the sixth switch component Q6 is connected to the second end of the load interface 205, and the second end of the sixth switch component Q6 is connected to the second end of the charging interface 208 and the second detection component 202.

[0110] Among them, the sixth switch component Q6 can be a relay, or can also be a contactor, IGBT, BJT, MOS transistor, etc.

[0111] It should be noted that the controller 206 is connected to the sixth switch component Q6, and is used to control the second switch component Q2, the third switch component Q3, the fourth switch component Q4, and the sixth switch component Q6 to close when receiving a charging signal, so that the second switch branch 204, the third switch branch 207, and the fourth switch branch 209 are conducted.

[0112] In the above technical solution, by simultaneously collecting the current in the power supply circuit through the first detection component and the second detection component, the accuracy of current collection in the power supply circuit can be effectively improved, and the power supply state of the power supply circuit can be controlled according to the first detection current collected by the first detection component and the second detection current collected by the second detection component, thereby effectively improving the power supply reliability of the power supply circuit.

[0113] Figure 6 is a block diagram of a battery pack shown according to an exemplary embodiment. As Figure 6 shown, the battery pack may include the above Figures 1 - 5 provided power supply circuit.

[0114] As Figures 7 - 8 shown,Figure 7 is a schematic diagram of a battery pack shown according to an exemplary embodiment, Figure 8 is according to Figure 7 an A-A cross-sectional view of a battery pack shown according to the illustrated embodiment. The battery pack may further include a first housing 1, a second housing 2, a tray 3, and a battery 4; the controller, the battery 4, the load interface, and the first housing 1 are fixed on the tray 3; the first housing 1 and the second housing 2 form a receiving cavity 5; the first switch branch, the second switch branch, and the third switch branch are located in the receiving cavity 5 and are fixed on the second housing 2.

[0115] It should be noted that the load interface is fixed to the side end of the tray 3, and the first housing 1 and the second housing 2 may be three-dimensional structures, such as: cuboid, cube, frustum, or hemisphere and other three-dimensional structures.

[0116] Optionally, still taking Figure 8 as an example, the charging interface may be fixed on the tray 3, and the fourth switch branch, the fifth switch branch, and the sixth switch assembly may also be placed in the receiving cavity 5 and fixed on the second housing 2.

[0117] An exemplary embodiment of the present disclosure also provides an electrical device, which includes a vehicle or an energy storage system, and both the vehicle or the energy storage system include the above Figures 6 - 8 described battery pack, or includes the above Figures 1 - 5 power supply circuit described in any one of the above.

[0118] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0119] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0120] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A flow divider, characterized in that: include: Conductive plate and sampling circuit module; The sampling circuit module is fixedly connected to the conductive plate, and a communication port is provided on the sampling circuit module; The sampling circuit module is used to collect current through the conductive plate and output the current through the communication port.

2. The flow divider according to claim 1, characterized in that: The conductive plate includes a first input terminal and a second input terminal, wherein the first input terminal and the second input terminal are used to connect to an external circuit to collect the current in the external circuit.

3. A power supply circuit, characterized in that: The invention comprises a first detection component, a second detection component, a first switch branch, a second switch branch and a load interface, wherein the load interface is used to connect a load. The first detection component is connected to the first end of the load interface through the first switch branch, and the second detection component is connected to the second end of the load interface through the second switch branch; At least one of the first detection assembly and the second detection assembly comprises a flow divider as claimed in claim 1 or 2; The first detection component is used to collect a first current of the first switch branch; The second detection component is used to collect a second current of the second switch branch.

4. The power supply circuit according to claim 3, characterized in that: The power supply circuit further includes: a third switch branch, the third switch branch is connected in parallel to two ends of the first switch branch, and the first detection component is further used to collect a third current of the third switch branch; or, The third switch branch is connected in parallel to two ends of the second switch branch, and the second detection component is further used to collect a fourth current of the third switch branch.

5. The power supply circuit according to claim 4, characterized in that: The power supply circuit also includes: a controller, which is respectively connected to the first detection component, the second detection component, the first switch branch and the second switch branch, and is used to obtain a first current collected by the first detection component and a second current collected by the second detection component, and control the conduction or disconnection of the first switch branch and the second switch branch based on the first current collected by the first detection component and the second current collected by the second detection component.

6. The power supply circuit according to claim 5, characterized in that: The controller is also connected to the third switch branch, and is used to obtain the third current collected by the first detection component, or the fourth current collected by the second detection component, and control the conduction or disconnection of the third switch branch based on the third current collected by the first detection component, or the fourth current collected by the second detection component.

7. The power supply circuit according to claim 5, characterized in that: The first switch branch includes: a first switch component; a first end of the first switch component is connected to the first detection component, and a second end of the first switch component is connected to a first end of the load interface.

8. The power supply circuit according to claim 7, characterized in that: The controller is connected to the first switch component, and is used to turn on the first switch branch by controlling the closing of the first switch component.

9. The power supply circuit according to claim 8, characterized in that: The second switch branch includes: a second switch component; a first end of the second switch component is connected to the second detection component, and a second end of the second switch component is connected to the second end of the load interface.

10. The power supply circuit according to claim 9, characterized in that: The controller is connected to the second switch component, and is used to turn on the second switch branch by controlling the closing of the second switch component.

11. The power supply circuit according to claim 5, characterized in that: The third switch branch includes: a third switch component and a first resistor; the third switch component is connected in series with the first resistor.

12. The power supply circuit according to claim 11, characterized in that: The controller is connected to the third switch component, and is used to control the third switch component to disconnect based on the third current collected by the first detection component or the fourth current collected by the second detection component, so as to disconnect the third switch branch.

13. The power supply circuit according to claim 3, characterized in that: The load interface includes a front drive interface and a rear drive interface, the load includes a front drive load and a rear drive load, the front drive interface is used to connect the front drive load, and the rear drive interface is used to connect the rear drive load; The first end of the front drive interface is connected to the first switch branch and the first end of the rear drive interface, and the second end of the front drive interface is connected to the second switch branch and the second end of the rear drive interface.

14. The power supply circuit according to claim 5, characterized in that: The power supply circuit also includes a charging interface, and the charging interface is used to connect a charging device; The first end of the charging interface is connected to the first detection component through the first switch branch, and the second end of the charging interface is connected to the second detection component through the second switch branch.

15. The power supply circuit according to claim 14, characterized in that: The power supply circuit further includes: a fourth switch branch and a fifth switch branch; The first end of the fourth switch branch is connected to the first end of the fifth switch branch and the first end of the load interface, and the second end of the fourth switch branch is connected to the second end of the fifth switch branch and the first end of the charging interface.

16. The power supply circuit according to claim 15, characterized in that: The first detection component is further used to collect a fifth current of the third switch branch, and the second detection component is further used to collect a sixth current of the third switch branch; The controller is connected to the fourth switch branch and the fifth switch branch, respectively, and is used to control the conduction of the second switch branch, the third switch branch, and the fourth switch branch, obtain the fifth current collected by the first detection component, and control the disconnection of the third switch branch and the fourth switch branch, and the conduction of the first switch branch and the fifth switch branch based on the fifth current collected by the first detection component; or control the conduction of the first switch branch, the third switch branch, and the fourth switch branch, obtain the sixth current collected by the second detection component, and control the disconnection of the third switch branch and the fourth switch branch, and the conduction of the second switch branch and the fifth switch branch based on the sixth current collected by the second detection component.

17. The power supply circuit according to claim 15, characterized in that: The fourth switch branch includes a fourth switch component and a second resistor; the fourth switch component is connected in series with the second resistor.

18. The power supply circuit according to claim 15, characterized in that: The fifth switch branch includes a fifth switch component; the fifth switch component is connected in parallel with the fourth switch branch.

19. The power supply circuit according to claim 14, characterized in that: The power supply circuit also includes a sixth switch component; a first end of the sixth switch component is connected to the second end of the load interface, and a second end of the sixth switch component is connected to the second end of the charging interface and the second detection component.

20. The power supply circuit according to any one of claims 3 to 19, characterized in that: The first detection component includes the shunt, and the shunt is connected to the first end of the load interface through the first switch branch; The second detection component includes a Hall sensor; the Hall sensor is connected to the second end of the load interface through the second switch branch.

21. A battery pack, characterized in that: The power supply circuit comprises any one of claims 3 to 20 above.

22. The battery pack according to claim 21, characterized in that: Also includes a first housing, a second housing, a tray and a battery; The controller, the battery, the load interface and the first shell are fixed on the tray; the second shell and the first shell form a receiving cavity; The first switch branch, the second switch branch and the third switch branch are located in the accommodating cavity and fixed on the second shell.

23. An electrical equipment, characterized in that: The electrical device includes the battery pack described in claim 21 or 22, or includes the power supply circuit described in any one of claims 3 to 19.

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