Integrated power distribution battery device and system

Abstract

The utility model relates to an integrated power distribution battery device and system, which includes: a 48V discharge circuit, electrically connected to a 48V battery; a 12V discharge circuit, connected to a 48V battery through a first DCDC converter; wherein the input end of the first DCDC converter is electrically connected to the 48V battery, and the output end of the first DCDC converter is electrically connected to the input end of the 12V discharge circuit; a MOS board; a battery management system, electrically connected to the 48V battery and also connected to the MOS board, the first DCDC converter and a client for communication, for monitoring and controlling the on and off of the MOS board and the working state of the first DCDC converter, and uploading the working state of the 48V battery, the MOS board and the first DCDC converter to the client. The device solves the problem of increasing the complexity and cost of the system due to the simultaneous application of two low-voltage electrical systems of 12V and 48V.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage power supply systems for vehicles, and in particular to an integrated power distribution battery device and system. Background Art

[0002] At present, new energy vehicles have more and more functions and higher automation, which means that there are more and more electronic and electrical components, and the demand for low-voltage power consumption is getting higher and higher. From the perspective of history and technological development, the voltage of low-voltage power supply is constantly increasing. The higher the voltage, the smaller the current under the same power demand. The related devices or wiring harnesses can choose smaller specifications or models, which has advantages in weight, size, cost, etc. In 1960, the low-voltage electrical system of the whole vehicle switched from 6V low voltage to 12V low voltage. Recently, new energy vehicles have tried to use 48V low voltage systems, which have verified that increasing the voltage is a feasible solution.

[0003] However, the technological transformation of the 12V low-voltage electrical market, which has been used for decades, cannot be achieved overnight. Therefore, in the future, it is very likely that both 12V and 48V low-voltage electrical systems will be used in a car. In addition, traditional low-voltage systems usually require one or several independent distribution boxes to manage and control the power output of the battery. The more electronic and electrical components there are, the larger the distribution box will be. This not only increases the complexity and cost of the system, but also takes up valuable space in the car.

[0004] Traditional hot-melt fuses have great limitations in use. They must reach a certain temperature to melt the internal fuse to play a protective role, which is greatly affected by the ambient temperature. In addition, the fuse may be too large, resulting in the fuse not melting before the circuit electronics have been burned. It may also be too small, resulting in the fuse melting frequently during normal use of the electronics. The low-voltage system is difficult to match. In addition, traditional hot-melt fuses are one-time and cannot be self-recovering, and the cost of later use is high. Utility Model Content

[0005] In view of this, it is necessary to provide an integrated power distribution battery device and system to solve the problem of increased system complexity and cost due to the simultaneous application of two low-voltage electrical systems of 12V and 48V.

[0006] In order to solve the above problems, the utility model provides an integrated power distribution battery device, including a 48V battery, the device comprising: a 48V discharge circuit, electrically connected to the output end of the 48V battery, for outputting a 48V voltage to the outside;

[0007] A 12V discharge circuit is connected to the output end of the 48V battery through a first DCDC converter, and is used to output a 12V voltage to the outside;

[0008] The input end of the first DCDC converter is electrically connected to the output end of the 48V battery, and the output end of the first DCDC converter is electrically connected to the input end of the 12V discharge loop;

[0009] MOS board;

[0010] The MOS board is electrically connected to the 48V battery, the 48V discharge circuit and the input end of the first DCDC converter, respectively, and is used to control the 48V battery to enter the discharge state and the 48V discharge circuit to be opened and closed;

[0011] The MOS board is connected to the 12V discharge circuit and is used to control the opening and closing of the 12V discharge circuit;

[0012] The MOS board is also connected to an external power supply to control the 48V battery to enter a charging state;

[0013] Battery management system;

[0014] The battery management system is electrically connected to the 48V battery and is used to collect and calculate the status of the 48V battery;

[0015] The battery management system is also connected to the MOS board, the first DCDC converter and an external client for communication, and is used to monitor and control the on and off of the MOS board and the working status of the first DCDC converter, and upload the working status of the 48V battery, the MOS board and the first DCDC converter to the client.

[0016] In a possible implementation, the 48V discharge circuit includes: a plurality of first 48V power distribution lines with eFuse, and a plurality of second 48V power distribution lines with HSD;

[0017] The 12V discharge circuit includes: a plurality of first 12V power distribution lines with eFuse, and a plurality of second 12V power distribution lines with HSD.

[0018] In a possible implementation, the device further includes: a MOS board;

[0019] The MOS board is electrically connected to the 48V battery, the 48V discharge circuit and the input end of the first DCDC converter, respectively, and is used to control the 48V battery to enter the discharge state and the 48V discharge circuit to be opened and closed;

[0020] The MOS board is connected to the 12V discharge circuit and is used to control the opening and closing of the 12V discharge circuit;

[0021] The MOS board is also connected to an external power source to control the 48V battery to enter a charging state.

[0022] In a possible implementation, the MOS board includes:

[0023] A charge-discharge MOS tube and an interface thereof, wherein the charge-discharge MOS tube interface is electrically connected to the 48V battery and the input end of the first DCDC converter;

[0024] A charging MOS tube and an interface thereof, wherein the charging MOS tube interface is connected to an external power source;

[0025] An eFuse power distribution MOS tube and its interface, wherein the eFuse power distribution MOS tube interface is electrically connected to the eFuse;

[0026] HSD power distribution MOS tube and its interface, the HSD power distribution MOS tube interface is electrically connected to the HSD.

[0027] In a possible implementation, the device further includes: a battery management system;

[0028] The battery management system is electrically connected to the 48V battery and is used to collect and calculate the status of the 48V battery;

[0029] The battery management system is also connected to the MOS board, the first DCDC converter and an external client for communication, and is used to monitor and control the on and off of the MOS board and the working status of the first DCDC converter, and upload the working status of the 48V battery, the MOS board and the first DCDC converter to the client.

[0030] The utility model also provides an integrated power distribution battery system, the system comprising: a power supply, a second DCDC converter and an integrated power distribution battery device as described in any one of the above method items;

[0031] The input end of the second DCDC converter is electrically connected to the power source, and the output end is connected to the integrated power distribution battery device, for charging and / or assisting in power supply to the device.

[0032] In a possible implementation, the second DCDC converter includes: a first output end with a voltage level of 48V, and a second output end with a voltage level of 12V.

[0033] In a possible implementation, the first output end of the second DCDC converter is connected to the MOS board to charge the 48V battery and / or to provide auxiliary power to the 48V discharge loop and the first DCDC converter;

[0034] The second output end of the second DCDC converter is connected to the input end of the 12V discharge loop, and is used to provide auxiliary power to the 12V discharge loop;

[0035] The second DCDC converter is also electrically connected to the battery management system for providing auxiliary power to the battery management system.

[0036] In a possible implementation, the system further includes: a 48V load module and a 12V load module;

[0037] Wherein, the 48V load module is connected to the output end of the 48V discharge circuit;

[0038] The 12V load module is connected to the output end of the 12V discharge circuit.

[0039] In a possible implementation, the 48V load module includes: a plurality of 48V high-power loads with a continuous operating current greater than 50A, and a plurality of 48V low-power loads with a continuous operating current less than 50A;

[0040] The 12V load module includes: a plurality of 12V high-power loads with a continuous working current greater than 50A, and a plurality of 12V low-power loads with a continuous working current less than 50A;

[0041] Wherein, the input end of the 48V high-power load is electrically connected to the output end of the first 48V power distribution line;

[0042] The input end of the 48V low-power load is electrically connected to the output end of the second 48V power distribution line;

[0043] The input end of the 12V high-power load is electrically connected to the output end of the first 12V power distribution circuit;

[0044] The input end of the 12V low-power load is electrically connected to the output end of the second 12V power distribution circuit.

[0045] The beneficial effects of the utility model are as follows: the utility model provides an integrated power distribution battery device, including a 48V battery, a 48V discharge circuit, a 12V discharge circuit and a DCDC converter. The device satisfies the power supply requirements of devices of different voltage levels in the low-voltage system through the DCDC converter, without changing the system structure. The entire device uses fewer hardware resources and has the characteristics of easy implementation, low cost and high practicality. It solves the problem of increased system complexity and cost in the prior art due to the simultaneous application of two low-voltage electrical systems of 12V and 48V. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic structural diagram of an embodiment of an integrated power distribution battery device provided by the utility model;

[0047] Figure 2This is a structural schematic diagram of an embodiment of the integrated power distribution battery system provided by the utility model. DETAILED DESCRIPTION

[0048] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] like Figure 1 As shown, a specific embodiment of the utility model discloses an integrated power distribution battery device 10, including a 48V battery 110, the device includes: a 48V discharge circuit 120, electrically connected to the 48V battery 110, for outputting a 48V voltage to the outside;

[0054] The 12V discharge circuit 130 is connected to the 48V battery 110 through the first DCDC converter 140 and is used to output a 12V voltage to the outside;

[0055] The input end of the first DCDC converter 140 is electrically connected to the 48V battery 110 , and the output end of the first DCDC converter 140 is electrically connected to the input end of the 12V discharge loop 130 ;

[0056] MOS board 150;

[0057] The MOS board 150 is electrically connected to the 48V battery 110 and the input terminal of the first DCDC converter 140, and is used to control the 48V battery 110 to enter a discharge state;

[0058] The MOS board 150 is connected to the 12V discharge circuit 130 and is used to control the opening and closing of the 12V discharge circuit 130;

[0059] The MOS board 150 is also connected to an external power source 160 to control the 48V battery 110 to enter a charging state;

[0060] Battery management system 170;

[0061] The battery management system 170 is electrically connected to the 48V battery 110 and is used to collect and calculate the status of the 48V battery 110;

[0062] The battery management system 170 is also connected to the MOS board 150, the first DCDC converter 140 and the external client 180 for communication, and is used to monitor and control the on and off of the MOS board 150 and the working status of the first DCDC converter 140, and upload the working status of the 48V battery 110, the MOS board 150 and the first DCDC converter 140 to the client 180.

[0063] It should be noted that, in this embodiment, the first DCDC converter may be a unidirectional DCDC converter.

[0064] Compared with the prior art, the utility model provides an integrated power distribution battery device, including a 48V battery, a 48V discharge circuit, a 12V discharge circuit and a DCDC converter. The device satisfies the power supply requirements of devices of different voltage levels in the low-voltage system through the DCDC converter without changing the system structure. The entire device uses fewer hardware resources and has the characteristics of easy implementation, low cost and high practicality. It solves the problem of increased system complexity and cost due to the simultaneous application of two low-voltage electrical systems of 12V and 48V in the prior art.

[0065] In a possible implementation, the 48V discharge circuit 120 includes: a plurality of first 48V power distribution lines with eFuse, and a plurality of second 48V power distribution lines with first HSD;

[0066] The 12V discharge circuit 130 includes: a plurality of first 12V power distribution lines with eFuses, and a plurality of second 12V power distribution lines with HSDs.

[0067] In a possible implementation, the MOS board 150 includes:

[0068] A charging and discharging MOS tube and its interface, wherein the charging and discharging MOS tube interface is electrically connected to the 48V battery 110 and the input end of the first DCDC converter 140;

[0069] A charging MOS tube and its interface, the charging MOS tube interface is connected to an external power source 160;

[0070] eFuse power distribution MOS tube and its interface, the eFuse power distribution MOS tube interface is electrically connected to the eFuse;

[0071] The HSD power distribution MOS tube and its interface, the HSD power distribution MOS tube interface is electrically connected to the HSD.

[0072] It should be noted that, in this embodiment, the charge and discharge MOS tube is mainly responsible for managing the charge and discharge state of the 48V battery. When the 48V battery is in the discharge state, the charge and discharge MOS tube simultaneously connects the first DCDC converter and the 48V discharge loop.

[0073] It can be understood that multiple HSD branches and eFuse branches are set in the 48V discharge circuit and the 12V discharge circuit, and these branches are also equipped with corresponding MOS tubes, and these MOS tubes are also integrated on the MOS board. In this way, while saving the space of the device, it can also meet the power supply requirements of loads of different voltage levels and different power loads, thereby enhancing the practicality of the device.

[0074] It should be noted that the first DCDC converter can be an independent controller according to the battery structure space, or it can be integrated with the battery management system. The working state of the first DCDC converter is controlled by the battery management system, and the first DCDC converter only communicates with the battery management system. The communication mode can be CAN or CANFD.

[0075] In addition, the first DCDC converter does not communicate directly with the entire vehicle. Its status signal is forwarded to the entire vehicle via the CAN or CANFD signal of the battery management system. The forwarded signals do not have to be all signals of the first DCDC converter. Only some required working signals need to be forwarded.

[0076] Similarly, the MOS board can be an independent PCBA or integrated with the battery management system according to the battery structure space; all MOS on and off in the MOS board are controlled by the battery management system, and their on and off status is sent to the client through the CAN or CANFD signal of the battery management system, and the battery management system reports the on and off reasons.

[0077] It is understandable that when there is no serious fault in the 48V battery, the 48V charge and discharge MOS is normally closed for charging or discharging the 48V battery, regardless of whether the vehicle is started or not;

[0078] When the vehicle is started and there is no serious fault in the 48V battery, the 48V charging MOS is closed for charging the 48V battery and for power input of the first DCDC converter;

[0079] When the 48V battery has no serious fault, the MOS tube in the 48V eFuse and HSD circuit connected to normal power is closed;

[0080] When there is no serious fault in the 48V battery and the first DCDC converter, the MOS tube in the 12V eFuse and HSD loop connected to normal power supply is closed.

[0081] It should be noted that when a serious fault occurs in the 48V battery, the MOS in the eFuse and HSD circuits are disconnected, and the MOS in the eFuse and HSD circuits can be closed again after the fault is restored. In addition, the MOS in the eFuse is quickly disconnected by the eFuse hardware circuit detection, and can also be disconnected by the battery management system when the fault is detected, and closed by the battery management system after the serious fault disappears; the MOS in the HSD is disconnected by the battery management system when the fault is detected, and closed by the battery management system after the serious fault disappears.

[0082] like Figure 2 The utility model also provides an integrated power distribution battery system 20, the system 20 comprises: a power supply 210, a second DCDC converter 220 and an integrated power distribution battery device 10 as described in any one of the above-mentioned device items;

[0083] The input end of the second DCDC converter 220 is electrically connected to the power source 210 , and the output end is connected to the integrated power distribution battery device 10 , for charging the device 10 and / or providing auxiliary power.

[0084] In a possible implementation, the second DCDC converter 220 includes: a first output terminal with a voltage level of 48V, and a second output terminal with a voltage level of 12V.

[0085] In a possible implementation, the first output terminal of the second DCDC converter 220 is connected to the MOS board 150 to charge the 48V battery 110 and / or to provide auxiliary power to the 48V discharge loop 120 and the first DCDC converter 140;

[0086] The second output terminal of the second DCDC converter 220 is connected to the input terminal of the 12V discharge loop 130 for providing auxiliary power to the 12V discharge loop 130;

[0087] The second DCDC converter 220 is also electrically connected to the battery management system 170 for providing auxiliary power to the battery management system 170 .

[0088] It can be understood that in this embodiment, the battery management system has more than four MOS drive interfaces, one connected to a 48V charging and discharging MOS, one connected to a 48V charging MOS, one or more connected to a MOS in a 48V eFuse and / or HSD circuit, and one or more connected to a 12V eFuse and / or HSD circuit.

[0089] In a possible implementation, the system 20 further includes: a 48V load module 230 and a 12V load module 240;

[0090] Wherein, the 48V load module 230 is connected to the output end of the 48V discharge circuit 120;

[0091] The 12V load module 240 is connected to the output end of the 12V discharge circuit 130 .

[0092] In a possible implementation, the 48V load module 230 includes: a plurality of 48V high-power loads 2301 with a continuous operating current greater than 50A, and a plurality of 48V low-power loads 2302 with a continuous operating current less than 50A;

[0093] The 12V load module 240 includes: a plurality of 12V high-power loads 2401 with a continuous working current greater than 50A, and a plurality of 12V low-power loads 2402 with a continuous working current less than 50A;

[0094] Wherein, the input end of the 48V high-power load 2301 is electrically connected to the output end of the first 48V power distribution line 1201;

[0095] The input end of the 48V low-power load 2302 is electrically connected to the output end of the second 48V power distribution line 1202;

[0096] The input end of the 12V high-power load 2401 is electrically connected to the output end of the first 12V power distribution line 1301;

[0097] The input end of the 12V low-power load 2402 is electrically connected to the output end of the second 12V power distribution line 1302 .

[0098] It should be noted that when the vehicle is turned off:

[0099] 1) The battery management system is dormant but will intermittently wake up. When dormant, it will not perform CAN / CANFD communication, fault judgment, first DCDC converter control or MOS on-off drive. However, it can perform fault judgment when it wakes up, and then choose whether to perform CAN / CANFD communication, first DCDC converter control or MOS on-off drive according to whether there is a serious fault in the battery system; the first DCDC converter continues to work, and will not perform CAN / CANFD communication when there is no serious fault in itself;

[0100] 2) The 48V battery charge and discharge MOS is closed by default, and the 48V battery can be discharged normally; the 48V battery charge MOS is disconnected by default, and the second DCDC converter does not work when the vehicle is turned off, and the 48V battery will not be charged;

[0101] 3) If a constant current load is connected from the 48V first output terminal to the 48V Nth output terminal, the battery management system controls the MOS of the eFuse and HSD in this loop to remain closed, otherwise the control is disconnected;

[0102] 4) If a constant current load is connected from the 12V first output terminal to the 12V Nth output terminal, the battery management system controls the MOS of the eFuse and HSD in this loop to remain closed, otherwise the control is disconnected.

[0103] When the vehicle is woken or started:

[0104] 1) The battery management system continues to work, performing CAN / CANFD communication, fault diagnosis, first DCDC converter control or MOS on / off drive;

[0105] 2) The first DCDC converter continues to work and will perform CAN / CANFD communication and fault diagnosis;

[0106] 3) The 48V battery charge and discharge MOS is closed by default, and the 48V battery can be charged and discharged normally;

[0107] 4) The 48V battery charging MOS is closed by default, and the 48V battery can be charged normally;

[0108] 5) The MOS of the eFuse and HSD from the first output terminal to the Nth output terminal in the 48V discharge circuit are closed by default. If a serious fault occurs in the battery system or the load circuit connected to the output terminal, the control is disconnected;

[0109] 6) The MOS of the eFuse and HSD from the first output terminal to the Nth output terminal in the 48V discharge circuit are closed by default. If a serious fault occurs in the battery system or a serious fault occurs in the load circuit connected to the output terminal, the control is disconnected.

[0110] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated power distribution battery device, comprising a 48V battery, characterized in that: The device also includes: a 48V discharge circuit, electrically connected to the 48V battery, for outputting a 48V voltage to the outside; A 12V discharge circuit is connected to the 48V battery through a first DCDC converter and is used to output a 12V voltage to the outside; The input end of the first DCDC converter is electrically connected to the 48V battery, and the output end of the first DCDC converter is electrically connected to the input end of the 12V discharge circuit; MOS board; The MOS board is electrically connected to the 48V battery, the 48V discharge circuit and the input end of the first DCDC converter, respectively, and is used to control the 48V battery to enter the discharge state and the 48V discharge circuit to be opened and closed; The MOS board is connected to the 12V discharge circuit and is used to control the opening and closing of the 12V discharge circuit; The MOS board is also connected to an external power supply to control the 48V battery to enter a charging state; Battery management system; The battery management system is electrically connected to the 48V battery and is used to collect and calculate the status of the 48V battery; The battery management system is also connected to the MOS board, the first DCDC converter and an external client for communication, and is used to monitor and control the on and off of the MOS board and the working status of the first DCDC converter, and upload the working status of the 48V battery, the MOS board and the first DCDC converter to the client.

2. The integrated power distribution battery device according to claim 1, characterized in that: The 48V discharge circuit includes: a plurality of first 48V distribution lines with eFuse, and a plurality of second 48V distribution lines with HSD; The 12V discharge circuit includes: a plurality of first 12V power distribution lines with eFuse, and a plurality of second 12V power distribution lines with HSD.

3. The integrated power distribution battery device according to claim 2, characterized in that: The MOS board includes: A charge-discharge MOS tube and an interface thereof, wherein the charge-discharge MOS tube interface is electrically connected to the 48V battery and the input end of the first DCDC converter; A charging MOS tube and an interface thereof, wherein the charging MOS tube interface is connected to an external power source; An eFuse power distribution MOS tube and its interface, wherein the eFuse power distribution MOS tube interface is electrically connected to the eFuse; HSD power distribution MOS tube and its interface, the HSD power distribution MOS tube interface is electrically connected to the HSD.

4. An integrated power distribution battery system, characterized in that: The system comprises: a power supply, a second DCDC converter and an integrated power distribution battery device as claimed in any one of claims 1 to 3; The input end of the second DCDC converter is electrically connected to the power source, and the output end is connected to the integrated power distribution battery device, for charging and / or assisting in power supply to the device.

5. The battery system according to claim 4, characterized in that: The second DCDC converter includes: a first output terminal with a voltage level of 48V, and a second output terminal with a voltage level of 12V.

6. The battery system according to claim 5, characterized in that: The first output end of the second DCDC converter is connected to the MOS board, and is used to charge the 48V battery, and / or to provide auxiliary power to the 48V discharge loop and the first DCDC converter; The second output end of the second DCDC converter is connected to the input end of the 12V discharge loop, and is used to provide auxiliary power to the 12V discharge loop; The second DCDC converter is also electrically connected to the battery management system for providing auxiliary power to the battery management system.

7. The battery system according to claim 4, characterized in that: The system also includes: a 48V load module and a 12V load module; Wherein, the 48V load module is connected to the output end of the 48V discharge circuit; The 12V load module is connected to the output end of the 12V discharge circuit.

8. The battery system according to claim 7, characterized in that: The 48V load module includes: a plurality of 48V high-power loads with a continuous working current greater than 50A, and a plurality of 48V low-power loads with a continuous working current less than 50A; The 12V load module includes: a plurality of 12V high-power loads with a continuous working current greater than 50A, and a plurality of 12V low-power loads with a continuous working current less than 50A; Wherein, the input end of the 48V high-power load is electrically connected to the output end of the first 48V power distribution line; The input end of the 48V low-power load is electrically connected to the output end of the second 48V power distribution line; The input end of the 12V high-power load is electrically connected to the output end of the first 12V power distribution circuit; The input end of the 12V low-power load is electrically connected to the output end of the second 12V power distribution circuit.

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