Power battery system, vehicle-mounted distribution box and vehicle-mounted distribution box control system

Abstract

The utility model provides a power battery system, a vehicle-mounted distribution box and a vehicle-mounted distribution box control system. The power battery system comprises a power transmission line, a transceiving module, a plurality of switching circuits and a plurality of power battery modules, wherein one end of each power battery module is connected with the first end of the transceiver module, the first ends of the plurality of switch circuits are respectively connected with the other ends of the plurality of power battery modules in a one-to-one correspondence manner, the second end of each switch circuit is connected with one end of the power transmission line, and the other end of the power transmission line is connected with the power transmission port. The third ends of the plurality of switching circuits are respectively connected with the second end of the transceiver module; the power battery module transmits an electric quantity signal to the transceiver module; the switch circuit receives first switch signals transmitted by the transceiver module, and the electric quantity signals are in one-to-one correspondence with the first switch signals. The power battery system can improve the power supply capacity of the power battery so as to solve the problem that the cruising ability of the new energy vehicle is poor due to the limited power supply capacity of the power battery.

Description

Technical Field

[0001] The present application relates to the technical field of electric vehicles, and more specifically, to a power battery system, a vehicle-mounted distribution box, and a vehicle-mounted distribution box control system. Background Art

[0002] With the rapid development of the vehicle industry, new energy vehicles are gradually taking the leading position. Compared with vehicles powered by fuel (such as gasoline, diesel, etc.), new energy vehicles have alleviated environmental pollution and energy crisis to a great extent. At present, the power source of new energy vehicles can be a power battery. During the driving process of the vehicle, the power battery is powered. When the power battery is insufficient, the power battery can be charged by a charger.

[0003] However, the power supply capacity of power batteries is limited, which can hardly meet the long-distance needs of new energy vehicles and has poor endurance. Utility Model Content

[0004] To solve the above problems, the present application provides a power battery system, a vehicle-mounted distribution box and a vehicle-mounted distribution box control system. The power battery system aims to solve the problem of poor endurance of new energy vehicles due to the limited power supply capacity of the power battery.

[0005] In a first aspect, the present application provides a power battery system, comprising a transmission line, a transceiver module, a plurality of switch circuits and a plurality of power battery modules; wherein one end of each power battery module is connected to a first end of the transceiver module, the first ends of the plurality of switch circuits are respectively connected one-to-one with the other ends of the plurality of power battery modules, the second end of each switch circuit is connected to one end of the transmission line, the other end of the transmission line is connected to a transmission port, and the third ends of the plurality of switch circuits are respectively connected to the second ends of the transceiver modules; the power battery module transmits a power signal to the transceiver module; the switch circuit receives a first switch signal transmitted by the transceiver module, and the power signal corresponds one-to-one with the first switch signal.

[0006] Based on the power battery system provided in the embodiment of the present application, it is provided with multiple power battery modules to improve the power supply capacity of the power battery module, thereby increasing the vehicle's endurance, solving the problem of poor endurance of new energy vehicles due to the limited power supply capacity of the power battery, and the transceiver module in the power battery system can receive the power signal of each power battery module, and send a first switching signal to the switching circuits corresponding to different power battery modules according to different needs to control the on and off of different switching circuits, thereby increasing the endurance while efficiently managing energy to optimize and shorten the charging time of the power battery module and the power supply stability of the power battery system to the vehicle, that is, to ensure the driving reliability of the vehicle using the battery control system.

[0007] In one possible design, the switching circuit is an electromagnetic relay, which includes: a first armature switch and a first coil, one end of the first armature switch is connected to the other end of the power battery module, and the other end of the first armature switch is connected to one end of the transmission line; the first coil is arranged corresponding to the first armature switch, one end of the first coil is connected to the second end of the transceiver module, and the other end of the first coil is grounded.

[0008] Based on the above optional method, the transceiver module controls the closing or opening of the first armature switch by controlling the charging state of the first coil, thereby controlling the on-off connection between the power battery module connected thereto and the power transmission port. The structure is simple, and the electromagnetic relay can use a smaller current and a lower voltage to control a larger current and a higher voltage. The operation is convenient and the flexibility is high.

[0009] In one possible design, the power battery system also includes a power transmission switch circuit, a first end of the power transmission switch circuit is connected to the third end of the transceiver module, a second end of the power transmission switch circuit is connected to one end of the transmission line, a third end of the power transmission switch circuit is connected to the other end of the transmission line, and the power transmission switch circuit receives a second switching signal transmitted by the transceiver module.

[0010] Based on the above optional manner, the transceiver module can control the on / off between the power battery module and the power transmission port by controlling a power transmission switch circuit, which is simple to operate.

[0011] In one possible design, the power battery system also includes a pre-charging switch circuit, a first end of the pre-charging switch circuit is connected to the fourth end of the transceiver module, a second end of the pre-charging switch circuit is connected to the second end of the switch circuit, and a third end of the pre-charging switch circuit is connected to the third end of the power transmission switch circuit.

[0012] Based on the above optional method, by setting up a pre-charging switch circuit, the problem of large current at the moment of power-on causing damage to the transmission line and the transmission switch circuit can be avoided, thereby ensuring the stability of the transmission line and the transmission switch circuit, that is, ensuring the power supply reliability of the power battery system.

[0013] In a possible design, the power transmission port is connected to the charger, and a switch circuit receives a first switch signal transmitted by the transceiver module indicating that the switch is turned on.

[0014] Based on the above optional method, when the power transmission port is connected to the charger, it refers to the charger charging the power battery module through the power transmission port. In this mode, the transceiver module can send a first switch signal to the switch circuit corresponding to one of the power battery modules to control its conduction for charging. In order to shorten the charging time to achieve efficient energy management, the transceiver module can control the power level to be lower than the threshold, that is, the switch circuit corresponding to the lowest power level is turned on. That is, after the vehicle is connected to the charging pile, the transceiver module will control the power level signal of each power battery module received, and control the switch circuit corresponding to the power battery module whose power level is lower than the threshold level corresponding to the power signal to be turned on, so that the charging pile will first charge the power battery module with the lowest power level. Compared with charging the power battery module with high power level, the output power of the charging pile is greater, so the charging speed is faster, thereby optimizing and shortening the charging time and achieving efficient management of charging energy.

[0015] In a possible design, the power transmission port is not connected to the charger, and at least one switch circuit receives a first switch signal transmitted by the transceiver module and characterized as being turned on.

[0016] Based on the above optional method, the power transmission port is not connected to the charger, which means that the power battery module is powered through the power transmission port. In this mode, the transceiver module can send a first switch signal to at least one switch circuit to control its conduction to power the device connected to the power transmission port. Assuming that the vehicle is traveling at a slow speed and does not need more power, the transceiver module can control a switch circuit to be turned on to power the vehicle, and the other switch circuits are disconnected. In this way, the vehicle consumes less electricity and increases the vehicle's endurance. Assuming that the vehicle is traveling at a fast speed and needs more power, the transceiver module can control multiple switch circuits to be turned on, so that multiple power battery modules can supply power to other devices at the same time to increase the power of the vehicle and ensure the driving stability of the vehicle. In this way, efficient management of the discharge energy of the power battery module is achieved, ensuring the stability of the power supply of the power battery system to the vehicle.

[0017] In a possible design, the power battery system further includes: a fuse, one end of the fuse is connected to the third end of the power transmission switch circuit, and the other end of the fuse is connected to the other end of the power transmission port.

[0018] Based on the above optional manner, the transmission line can operate safely by setting a fuse to protect it.

[0019] In one possible design, the power battery system also includes: an insulation information transmission module, the first end of the insulation information transmission module is connected to the other end of each power battery module, the second end of the insulation information transmission module is connected to the fifth end of the transceiver module, the power battery module transmits insulation performance to the insulation information transmission module, and the insulation information transmission module is used to receive insulation performance and transmit it to the transceiver module.

[0020] Based on the above optional method, the insulation performance of the power battery module can be measured in real time by providing an insulation information transmission module. When an abnormality is detected, the detection information corresponding to the abnormal state can be sent to the transceiver module, so that the transceiver module can adjust the power battery system based on the detection information to ensure the safety and reliability of the power battery system, that is, to ensure the power supply reliability of the power battery system.

[0021] In a second aspect, the present application provides a vehicle-mounted distribution box, comprising a shell and a power battery system as described in any optional manner in the first aspect; the transmission line and the switch circuit are arranged in the shell, the transmission port includes a charging port and a discharging port, and the transceiver module is arranged outside the shell.

[0022] Based on the vehicle-mounted distribution box provided in the embodiment of the present application, the shell can accommodate and protect the transmission lines and switching circuits in the power battery system. In addition, by integrating the electrical equipment in the vehicle such as transmission lines, switching circuits and other circuits (such as pre-charging switching circuits, insulation information transmission modules, etc.) in a vehicle-mounted distribution box, unnecessary high-voltage circuit harnesses are reduced, which is conducive to the lightweight development of the vehicle.

[0023] In the third aspect, the present application provides a vehicle-mounted distribution box control system, comprising the vehicle-mounted distribution box, charger, DC / DC converter and motor controller described in any optional manner of the second aspect; the charger is connected to the charging port of the vehicle-mounted distribution box; the DC / DC converter is connected to the discharge port of the vehicle-mounted distribution box; and the motor controller is connected to the discharge port of the vehicle-mounted distribution box.

[0024] Based on the vehicle-mounted distribution box control system provided in the embodiment of the present application, the endurance of the vehicle-mounted distribution box control system is increased by providing a power battery system, and the driving reliability of the vehicle-mounted distribution box control system is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the module structure of a vehicle-mounted power distribution box provided in an embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of the module structure of another vehicle-mounted power distribution box provided in an embodiment of the present application;

[0027] Figure 3It is a schematic diagram of the module structure of another vehicle-mounted power distribution box provided in an embodiment of the present application;

[0028] Figure 4 is a schematic diagram of an exemplary module structure of a power battery system provided in an embodiment of the present application;

[0029] Figure 5 is a schematic diagram of an exemplary circuit structure of a power battery system provided in an embodiment of the present application;

[0030] Figure 6 is another exemplary circuit structure diagram of a power battery system provided in an embodiment of the present application;

[0031] Figure 7 is a schematic diagram of an exemplary circuit structure of another power battery system provided in an embodiment of the present application;

[0032] Figure 8 is a schematic diagram of an exemplary circuit structure of another power battery system provided in an embodiment of the present application;

[0033] Fig. 9 is a schematic diagram of an exemplary circuit structure of another power battery system provided in an embodiment of the present application;

[0034] Fig.10 is a schematic diagram of an exemplary circuit structure of another power battery system provided in an embodiment of the present application;

[0035] Fig.11 It is a schematic diagram of an exemplary circuit structure of another power battery system provided in an embodiment of the present application.

[0036] Among them, the reference numerals in the figure are:

[0037] 1. Shell;

[0038] 2. Power battery system; 201. Power battery module; 202. Transceiver module; 203. Power transmission line; 204. Switch circuit; 204A. First armature switch; 204B. First coil; 205. Power transmission switch circuit; 205A. Second armature switch; 205B. Second coil; 206. Pre-charge switch circuit; 206A. Third armature switch; 206B. Third coil; R. Pre-charge resistor; 207. Fuse; 208. Insulation information transmission module;

[0039] 3. Power transmission port; 301. Charging port; 302. Discharging port;

[0040] 4. Charger;

[0041] 5. DC / DC converter;

[0042] 6. Motor controller. DETAILED DESCRIPTION

[0043] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, and circuits are omitted to prevent unnecessary details from obstructing the description of the present application.

[0044] New energy vehicles have alleviated environmental pollution and energy crises to a great extent, and have gradually occupied a dominant position in vehicles. The power source in new energy vehicles can be a power battery, which is installed in the vehicle. During the driving process of the vehicle, the power battery is powered by the power battery. When the power battery is insufficient, the power battery can be charged by a charger. However, the power supply capacity of the power battery is usually limited, which is difficult to meet the long-distance needs of new energy vehicles, resulting in poor endurance of vehicles using power batteries as power sources.

[0045] At present, related technologies usually use two methods to increase the endurance of vehicles. One is to increase the capacity of a single power battery to increase the power supply time of the power battery. However, increasing the capacity will also increase the weight and volume of a single power battery, resulting in a larger area occupied inside the vehicle, and when the power battery fails or needs to be replaced, it is inconvenient to disassemble and assemble. The second is to increase the number of power battery packs inside the vehicle, and to power the vehicle through multiple power battery packs to increase the endurance of the vehicle. Here, it is worth noting that the power battery pack includes other circuits and devices such as a power battery system for controlling the charging and discharging of the power battery. However, increasing the number of power battery packs inside the vehicle requires a corresponding increase in high-voltage connecting line circuits, which are complex and have certain safety hazards. In addition, adding multiple power battery packs also increases the difficulty of vehicle energy management.

[0046] To this end, the present application provides a power battery system, a vehicle-mounted power distribution box, and a vehicle-mounted power distribution box control system. The power battery system can efficiently manage energy while increasing the endurance, so as to optimize and shorten the charging time of the power battery module and the power supply stability of the power battery system to the vehicle, that is, to ensure the driving reliability of the vehicle using the battery control system.

[0047] The power battery system, vehicle-mounted distribution box and vehicle-mounted distribution box control system provided in the present application are exemplarily introduced below in conjunction with the accompanying drawings.

[0048] An embodiment of the present application provides a vehicle-mounted distribution box, which can be applied to a vehicle-mounted distribution box control system. The vehicle-mounted distribution box control system may include a vehicle-mounted distribution box, a power battery module, a charger, a DC / DC converter, and the like.

[0049] The power battery module is connected to the on-board distribution box, and the on-board distribution box can provide power to the vehicle through the power battery module, that is, the on-board distribution box can provide power to the vehicle during driving and use of the vehicle. Here, it can be understood that the on-board distribution box provides power, that is, the on-board distribution box can be integrated with a power transmission port, such as a charging port for charging the power battery and a discharge port for powering the vehicle, so as to achieve the effect of providing power to the vehicle.

[0050] In one example, if Figure 1 As shown, the vehicle-mounted power distribution box provided in the embodiment of the present application may include a housing 1, a power battery system 2 and a power transmission port 3, wherein the power battery system 2 includes a plurality of power battery modules 201. At this time, the vehicle-mounted power distribution box control system may include a charger 4 and a DC / DC converter 5, wherein the charger 4, the DC / DC converter 5 and the plurality of power battery modules 201 are all arranged outside the housing 1. Figure 1 As shown, the multiple groups of power battery modules 201 provided in the present application are in a parallel state and are controlled by the same power battery system 2. In this way, the working states of different power battery modules 201 can be switched by one power battery system 2. The operation is simple and there is no need for operators to manually adjust the working states of different power battery modules 201, which saves manpower. Moreover, it is worth noting that the embodiment of the present application only takes the setting of 4 groups of power battery modules 201 as an example to carry out an exemplary description. The number of power battery modules 201 can be set according to actual needs, and the present application does not make specific restrictions on this.

[0051] Among them, the charger 4, the DC / DC converter 5 and the motor controller 6 are respectively connected to the power transmission port 3, and the power battery system 2 is used to control the on and off between the multiple power battery modules 201 and the power transmission port 3 to achieve different usage effects, that is, charging the power battery module 201 through the charger 4 or supplying power to the DC / DC converter 5 through the power battery module 201, etc. Here, it can be understood that the charger 4, as a charging device, needs to charge the power battery module 201, that is, when the power transmission port 3 is connected to the charger 4, it refers to the charger 4 charging the power battery module 201 through the power transmission port 3; the DC / DC converter 5, as a power receiving device, needs to be supplied to the power battery module 201, that is, when the power transmission port 3 is not connected to the charger 4, it refers to the power battery module 201 supplying power to the DC / DC converter 5 through the power transmission port 3, etc. Therefore, the power transmission port 3 connected to the charger 4 and the DC / DC converter 5 is a different power transmission port 3. Exemplarily, such as Figure 2As shown, the power transmission port 3 may include a charging port 301 and a discharging port 302 , the charger 4 is connected to the charging port 301 , and the DC / DC converter 5 and the motor controller 6 are respectively connected to the discharging port 302 .

[0052] Here, it is worth noting that when no charger 4 is plugged into the corresponding power transmission port 3 (for example, Figure 3 When there is a charging port 301 as shown, the electrical signal sent to the transceiver module 202 by the charging port 301 can be a low-level signal, indicating that there is no charger 4 plugged in at this time, and the power battery module 201 needs to supply power to the DC / DC converter 5 etc. through the discharge port 302; when there is a charger 4 plugged in the corresponding charging port 301, the electrical signal sent to the transceiver module 202 by the charging port 301 can be a high-level signal, indicating that there is a charger 4 plugged in at this time, and the charger 4 charges the power battery module 201 through the power transmission port 3. That is, the transceiver module 202 can detect and switch the power supply and charging of the power battery module 201 based on different level signals.

[0053] It can be understood that one end of the motor controller 6 provided in the embodiment of the present application is connected to the discharge port 302 , and the other end of the motor controller 6 is connected to the drive motor, so that the vehicle-mounted distribution box can be connected to the drive motor through the motor controller 6 .

[0054] Here, it is worth noting that a plurality of discharge ports 302 may be provided, so that a plurality of power battery modules 201 can supply power to other vehicle-mounted devices through the discharge ports 302, for example, Figure 3 As shown, one discharge port 302 is connected to the DC / DC converter 5, and the other discharge port 302 is connected to the motor controller 6 (MicroControllerUnit, MCU). The integrated charging and distribution device provided in the present application may also include a discharge port 302 for powering other vehicle-mounted devices. This application does not make any specific restrictions on this.

[0055] The power battery system 2 provided in the embodiment of the present application is used to control the connection and disconnection between multiple power battery modules 201 and the power transmission port 3 to achieve different usage effects. In one example, Figure 4As shown, the power battery system 2 provided in the embodiment of the present application may include a transceiver module 202, a transmission line 203 and a plurality of switch circuits 204, one end of each switch circuit 204 is connected to the first end of the transceiver module 202, specifically, the transceiver module 202 can receive the power signal of each power battery module 201 through the controller area network (Controller Area Network, CAN) signal, here, it is worth noting that the transceiver module 202 can also receive the temperature, voltage and current of the power battery module 201, and the present application does not make specific restrictions on this. The first ends of the multiple switch circuits 204 are respectively connected to the other ends of the multiple power battery modules 201 in a one-to-one correspondence, and the second end of each switch circuit 204 is connected to one end of the transmission line 203, and the other end of the transmission line 203 is connected to the transmission port 3. The power battery module 201 transmits a power signal to the transceiver module 202, that is, the transceiver module 202 can receive the power signal of each power battery module 201, and generate a first switch signal according to the power signal, and transmit the first switch signal to the corresponding switch circuit 204 to control the on and off of the corresponding switch circuit 204.

[0056] In this way, a plurality of power battery modules 201 are provided in the power battery system 2 to improve the power supply capacity of the power battery module 3, thereby increasing the endurance of the vehicle using the power battery system 2, solving the problem of poor vehicle endurance caused by the limited power supply capacity of the power battery, and the transceiver module 202 in the power battery system 2 can control the on and off of the switch circuit 204 corresponding to different power battery modules 201 according to different needs, thereby realizing efficient management of energy. It is worth noting here that efficient management of energy can be management of the energy discharged by the power battery module 201 to ensure the power supply stability of the power battery system 2, or management of the energy charged by the charger 4, thereby optimizing and shortening the charging time. It is worth noting here that efficient management of energy can be management of the energy discharged by the power battery module 201 to ensure the power supply stability of the power battery system 2, or management of the energy charged by the charger 4, thereby optimizing and shortening the charging time.

[0057] Exemplarily, during the driving process of the vehicle, the power battery module 201 supplies power to it, that is, the vehicle is in the second working mode at this time, and the power battery module 201 can supply power to the DC / DC converter 5 and the motor controller 6 via the power transmission port 3 (i.e., the discharge port 302). At this time, at least one switch circuit 204 receives the first switch signal transmitted by the transceiver module 202, which is characterized as being turned on, that is, the transceiver module 202 can control at least one switch circuit 204 to be turned on through the first switch signal to power the device connected to the power transmission port 3. Assuming that the vehicle is traveling at a slow speed at this time and the vehicle does not need a large power, the transceiver module 202 can control one switch circuit 204 to be turned on to power the vehicle, and the other switch circuits 204 are disconnected, so that the vehicle consumes less power and increases the vehicle's endurance. Assuming that the vehicle is traveling at a fast speed at this time and the vehicle needs a large power, the transceiver module 202 can control multiple switch circuits 204 to be turned on, so that multiple power battery modules 201 can simultaneously supply power to the motor controller 6 to provide more power to the vehicle and ensure the driving stability of the vehicle. The power battery system 2 in the present application realizes efficient management of the discharge energy of the power battery module 201 , thereby ensuring the stability of power supply of the power battery system 2 to the vehicle.

[0058] Exemplarily, when the vehicle travels near the charging pile, the charging pile can charge the power battery module 201 via the power transmission port 3, that is, the vehicle is in the first working mode at this time, one of the switch circuits 204 receives the first switch signal transmitted by the transceiver module 202, which is characterized as being turned on, and the other switch circuits 204 receive the first switch signal transmitted by the transceiver module 202, which is characterized as being turned off, that is, the transceiver module 202 can control the switch circuit 204 corresponding to one of the power battery modules 201 to be turned on for charging. Further, in order to shorten the charging time to achieve efficient energy management, the transceiver module 202 can send a first switch signal to the switch circuit 204 corresponding to the power battery module 201 when the power corresponding to the power signal is lower than the threshold, so as to control the switch circuit 204 to be turned on, so that the power transmission port 3 can charge the corresponding power battery module 201. That is, after the vehicle is connected to the charging pile, the transceiver module 202 will receive the power signal of each power battery module 201, and transmit the first switch signal characterized by being turned on to the switch circuit 204 corresponding to the power battery module 201 with a power lower than the threshold, so as to control the switch circuit 204 corresponding to the power battery module 201 with a power lower than the threshold corresponding to the power signal to be turned on. At the same time, the first switch signal characterized by being turned off is transmitted to the remaining switch circuits 204, so that the charging pile can first charge the power battery module 201 with the lowest power. Compared with charging the power battery module 201 with a high power, the output power of the charging pile is greater, so the charging speed is faster, thereby optimizing and shortening the charging time, and realizing efficient management of charging energy.

[0059] The power transmission line 203 and the plurality of switch circuits 204 are located inside the housing 1 , and the transceiver module 202 is located outside the housing 1 .

[0060] Optionally, the transceiver module 202 may be a vehicle control unit (VCU), which may control the on-off of the switch circuit 204 through a preset power management strategy, which will not be described in detail.

[0061] In this way, the embodiment of the present application provides a power battery system 2 that can efficiently manage energy while increasing the endurance, so as to optimize and shorten the charging time of the power battery module 201 and the power supply stability of the power battery system 2 to the vehicle, thereby ensuring the driving reliability of the vehicle using the battery control system 2.

[0062] Optional, such as Figure 5 As shown, the switch circuit 204 may be an electromagnetic relay, which may include a first armature switch (eg, Figure 5 204A) and the first coil (as shown Figure 5 As shown in FIG204B), one end of the first armature switch 204A is connected to the other end of the power battery module 201, and the other end of the first armature switch 204A is connected to one end of the power transmission line 203. The first coil 204B is arranged corresponding to the first armature switch 204A, and one end of the first coil 204B is connected to the second end of the transceiver module 202, and the other end of the first coil 204B is grounded. The transceiver module 202 controls the closing or opening of the first armature switch 204A by controlling the charging state of the first coil 204B, thereby controlling the connection and disconnection between the power battery module 201 connected thereto and the power transmission port 3. The structure is simple, and the electromagnetic relay can use a smaller current and a lower voltage to control a larger current and a higher voltage, which is convenient to operate and has high flexibility.

[0063] In one example, if Figure 6 As shown, the power battery system 202 may further include a power transmission switch circuit 205, a first end of the power transmission switch circuit 205 is connected to a third end of the transceiver module 202, a second end of the power transmission switch circuit 205 is connected to one end of the power transmission line 205, and a third end of the power transmission switch circuit 205 is connected to the other end of the power transmission line 205. The transceiver module 202 may send a second switch signal to the power transmission switch circuit 205 to control the on-off of the power transmission switch circuit 205, thereby controlling the on-off of the power transmission line 201. In this way, the transceiver module 202 may control the on-off between multiple power battery modules 201 and the power transmission port 3 by controlling one power transmission switch circuit 205, and the operation is simple.

[0064] Optional, such as Figure 7As shown, the power transmission switch circuit 205 may include an electromagnetic relay, and the electromagnetic relay may include a second armature switch (such as Figure 7 205A) and a second coil (as shown Figure 7 As shown in FIG205B), one end of the second armature switch 205A is connected to the switch circuit 204, the other end of the second armature switch 205A is connected to the power transmission line 203, the second coil 205B is arranged corresponding to the second armature switch 205A, one end of the second coil 205B is connected to the transceiver module 202, and the other end of the second coil 205B is grounded. The transceiver module 202 controls the closing or opening of the second armature switch 205A by controlling the charging state of the second coil 205B, thereby controlling the connection and disconnection between the switch circuit 204 connected thereto and the power transmission port 3. The structure is simple, and the electromagnetic relay can use a smaller current and a lower voltage to control a larger current and a higher voltage, which is convenient to operate and has high flexibility.

[0065] In order to prevent the large current at the moment of vehicle power-on from damaging the power transmission line 203 and the power transmission switch circuit 205, in one example, Figure 8 As shown, the power battery system 202 may further include a pre-charging switch circuit 206, a first end of the pre-charging switch circuit 206 being connected to the fourth end of the transceiver module 202, a second end of the pre-charging switch circuit 206 being connected to the second end of the switch circuit 204, and a third end of the pre-charging switch circuit 206 being connected to the third end of the transmission switch circuit 205. The pre-charging switch circuit 206 is used to limit the power-on impact current of the transmission line 203 to avoid the problem of large current at the moment of power-on causing damage to the transmission line 203 and the transmission switch circuit 205, thereby ensuring the stability of the transmission line 203 and the transmission switch circuit 205, that is, ensuring the power supply reliability of the power battery system 1.

[0066] Optional, such as Fig. 9 As shown, the pre-charge switch circuit 206 may include an electromagnetic relay and a pre-charge resistor (eg Fig. 9 R), the electromagnetic relay may include a third armature switch (such as Fig. 9 206A) and a third coil (as shown Fig. 9As shown in FIG206B), one end of the third armature switch 206A is connected to the second end of the switch circuit 204, the other end of the third armature switch 206A is connected to one end of the pre-charging resistor R, the other end of the pre-charging resistor R is connected to the third end of the power transmission switch circuit 205, the third coil 206B is arranged corresponding to the third armature switch 206A, one end of the third coil 206B is connected to the fifth end of the transceiver module 202, and the other end of the third coil 206B is grounded. The transceiver module 202 controls the closing or opening of the third armature switch 206A by controlling the charging state of the third coil 206B, thereby controlling the pre-charging effect of the pre-charging switch circuit 206. It is worth noting here that when the vehicle is powered on (i.e., the vehicle is started), the transceiver module 202 will control the third armature switch 206A to close, so that the pre-charging resistor R can limit the power-on impact current of the transmission line 203 and the transmission switch circuit 205, thereby ensuring the safety and stability of the power battery system 2.

[0067] In one example, if Fig.10 As shown, the power battery system 202 may further include a fuse 207, one end of the fuse 207 is connected to the third end of the power transmission switch circuit 205, and the other end of the fuse 207 is connected to the other end of the power transmission port 3 to protect the power transmission line 203 from operating safely.

[0068] In order to avoid the harm of high-voltage circuit leakage, short circuit, etc. to external devices and users, the present application can detect the circuit status of the power battery system 2 in real time. In one example, Fig.11 As shown, the power battery system 202 may also include an insulation information transmission module 208, a first end of the insulation information transmission module 208 is connected to the other end of each power battery module 201, a second end of the insulation information transmission module 208 is connected to the fifth end of the transceiver module 202, the power battery module 201 transmits insulation performance to the insulation information transmission module 208, the insulation information transmission module 208 receives the insulation performance and transmits it to the transceiver module 202, here, it can be understood that the insulation information transmission module 208 can measure the insulation performance of the power battery module 201, and send the measured insulation performance to the transceiver module 202 via the CAN line, so that the transceiver module 202 can control the switch circuit 204 corresponding to the power battery module 201 based on the preset power management strategy, thereby ensuring the safety and reliability of the power battery system 2.

[0069] Here, it can be understood that the insulation information transmission module 208 can also detect the high-voltage circuit of the power battery system 2, for example, detect abnormal conditions such as leakage and short circuit in the high-voltage circuit. When an abnormality is detected, the detection information corresponding to the abnormal state can be sent to the transceiver module 202, so that the transceiver module 202 can adjust the power battery system 2 based on the detection information to ensure the safety and reliability of the power battery system 2, that is, to ensure the power supply reliability of the power battery system 2.

[0070] To this end, the power battery system 2 provided in the embodiment of the present application is provided with multiple power battery modules 201 to improve the power supply capacity of the power battery module 3, thereby increasing the cruising range of the vehicle using the power battery system 2, and solving the problem of poor vehicle cruising range caused by the limited power supply capacity of the power battery. The transceiver module 202 in the power battery system 2 can control the on and off of the switching circuit 204 corresponding to different power battery modules 201 according to different needs, thereby increasing the cruising range while efficiently managing energy to optimize and shorten the charging time of the power battery module 201 and the power supply stability of the power battery system 2 to the vehicle, thereby ensuring the driving reliability of the vehicle using the battery control system 2.

[0071] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0072] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0073] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0074] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0075] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A power battery system, characterized in that: The power battery system includes a power transmission line, a transceiver module, a plurality of switch circuits and a plurality of power battery modules; One end of each of the power battery modules is connected to the first end of the transceiver module, the first ends of the plurality of switch circuits are connected to the other ends of the plurality of power battery modules in a one-to-one correspondence, the second end of each of the switch circuits is connected to one end of the power transmission line, the other end of the transmission line is connected to the power transmission port, and the third ends of the plurality of switch circuits are connected to the second ends of the transceiver modules respectively; The power battery module transmits a power signal to the transceiver module; The switch circuit receives a first switch signal transmitted by the transceiver module, and the power signal corresponds to the first switch signal in a one-to-one manner.

2. The power battery system according to claim 1, characterized in that: The switch circuit is an electromagnetic relay, and the electromagnetic relay comprises: a first armature switch, wherein one end of the first armature switch is connected to the other end of the power battery module, and the other end of the first armature switch is connected to one end of the power transmission line; The first coil is arranged corresponding to the first armature switch, one end of the first coil is connected to the second end of the transceiver module, and the other end of the first coil is grounded.

3. The power battery system according to claim 1, characterized in that: The power battery system further includes: a power transmission switch circuit, wherein a first end of the power transmission switch circuit is connected to a third end of the transceiver module, a second end of the power transmission switch circuit is connected to one end of the power transmission line, and a third end of the power transmission switch circuit is connected to the other end of the power transmission line; The power transmission switch circuit receives a second switch signal transmitted by the transceiver module.

4. The power battery system according to claim 3, characterized in that: The power battery system further includes: A pre-charging switch circuit, wherein the first end of the pre-charging switch circuit is connected to the fourth end of the transceiver module, the second end of the pre-charging switch circuit is connected to the second end of the switch circuit, and the third end of the pre-charging switch circuit is connected to the third end of the power transmission switch circuit.

5. The power battery system according to any one of claims 1 to 4, characterized in that: The power transmission port is connected to the charger, and one of the switch circuits receives the first switch signal transmitted by the transceiver module and characterized as being turned on.

6. The power battery system according to any one of claims 1 to 4, characterized in that: The power transmission port is not connected to the charger, and at least one of the switch circuits receives the first switch signal transmitted by the transceiver module and characterized as being turned on.

7. The power battery system according to claim 3, characterized in that: The power battery system further includes: A fuse, one end of the fuse is connected to the third end of the power transmission switch circuit, and the other end of the fuse is connected to the other end of the power transmission port.

8. The power battery system according to claim 7, characterized in that: The power battery system further includes: An insulation information transmission module, wherein the first end of the insulation information transmission module is connected to the other end of each of the power battery modules, the second end of the insulation information transmission module is connected to the fifth end of the transceiver module, the power battery module transmits insulation performance to the insulation information transmission module, and the insulation information transmission module is used to receive the insulation performance and transmit it to the transceiver module.

9. A vehicle-mounted distribution box, characterized in that: include: case; According to the power battery system according to any one of claims 1 to 8, the power transmission line and the switch circuit are arranged in the shell, the power transmission port includes a charging port and a discharging port, and the transceiver module is arranged outside the shell.

10. A vehicle-mounted distribution box control system, characterized in that: include: The vehicle-mounted power distribution box as claimed in claim 9; A charger connected to the charging port of the vehicle-mounted power distribution box; A DC / DC converter connected to the discharge port of the vehicle-mounted power distribution box; The motor controller is connected to the discharge port of the vehicle-mounted power distribution box.

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