A battery management system wakeup device
By connecting the battery pack management unit via a daisy chain and using the wake-up module and communication module to obtain the wake-up level, the problem of controller resource occupation during the wake-up process of the battery pack management unit is solved, and efficient and low-cost battery pack management is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING HAIER INTELLIGENT ELECTRONICS CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-14
Smart Images
Figure CN224503381U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of energy storage management equipment, specifically, it relates to a battery management system wake-up device. Background Technology
[0002] In the energy storage industry, the importance of battery packs is self-evident. As the mainstream method of energy storage, the capacity requirements for battery packs are becoming increasingly stringent, because the larger the capacity, the longer the usage time, i.e., the longer the driving range.
[0003] Since a single battery pack has a limited capacity, current methods expand battery capacity by connecting multiple battery packs in parallel. Furthermore, monitoring and management of each battery pack are achieved by assigning an address to each pack. In existing technologies, waking up each battery pack is achieved by setting a hardwired switch; the address encoding of each battery pack is either manually applied using DIP switches on the circuit board or programmed into the circuit board's memory. This not only affects production efficiency but also incurs costs for the hardwired switches and DIP switches, increasing overall costs.
[0004] Alternatively, some slave devices can be woken up by a wake-up signal sent by the master controller and then write the code by sending an encoding signal from the master. Another method involves a subsequent slave device being woken up by a wake-up signal sent by the controller of a preceding slave device and then writing the code by sending an encoding signal from the preceding slave device. This consumes controller resources and affects efficiency.
[0005] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention
[0006] This invention addresses the problem in existing technologies where each battery pack management unit is woken up by a wake-up signal sent by the control module of the preceding battery pack management unit, thus consuming controller resources. It proposes a battery management system wake-up device that includes a wake-up module connected to a communication module. The communication module acquires the wake-up level and wakes up each slave unit in a daisy-chain sequence, saving hardware resources and reducing costs.
[0007] To achieve the above-mentioned utility model / design objectives, the present utility model adopts the following technical solution:
[0008] A battery management system wake-up device, wherein the battery management system includes multiple battery pack management units;
[0009] Each of the battery pack management units comprises a master unit and multiple slave units; the wake-up device includes multiple communication modules and multiple wake-up modules; the master unit and each of the slave units are connected sequentially in a daisy-chain manner through each of the communication modules;
[0010] Each of the wake-up modules is connected to the corresponding communication module and is used to obtain the wake-up level according to the daisy chain connection order, so as to wake up each of the slave devices in sequence.
[0011] In some specific embodiments, the communication module includes a first communication module and a second communication module; the battery pack management unit is connected to the first communication module and the second communication module respectively; the second communication module corresponding to the preceding battery pack management unit is connected to the first communication module corresponding to the following battery pack management unit for communication between adjacent battery pack management units;
[0012] The wake-up module is connected to the common terminal of the first communication module and the second communication module, and is used to wake up the slave device.
[0013] In some specific embodiments, the first communication module and the second communication module are both CAN transceiver modules, which include CAN transceivers and are connected through high-voltage communication lines and low-voltage communication lines.
[0014] The wake-up module includes a first optocoupler, whose two ends of the diode are respectively connected to the high-voltage communication line and the low-voltage communication line. One end of the transistor is connected to the first low-voltage power supply through a resistor and is used to output the wake-up level. The other end of the transistor is grounded.
[0015] In some specific embodiments, the CAN transceiver is a TPT1255.
[0016] In some specific embodiments, the CAN transceiver module further includes a digital isolator, which is dual-channel and includes a first end, a second end, a third end, and a fourth end, for isolating the signals transmitted by the first end and the second end from the signals transmitted by the third end and the fourth end;
[0017] The third and fourth terminals are respectively connected to the transmit and receive pins of the CAN transceiver.
[0018] In some specific embodiments, both the first communication module and the second communication module are 485 transceiver modules, which include 485 transceivers and are connected via communication line A and communication line B.
[0019] The wake-up module includes a first optocoupler, whose two ends of the diode are respectively connected to the A communication line and the B communication line. One end of the transistor is connected to a first low-voltage power supply through a resistor and is used to output the wake-up level. The other end of the transistor is grounded.
[0020] In some specific embodiments, the 485 transceiver is a TPT487.
[0021] In some specific embodiments, the 485 transceiver module further includes a digital isolator, which is dual-channel and includes a first end, a second end, a third end, and a fourth end, for isolating the signals transmitted by the first end and the second end from the signals transmitted by the third end and the fourth end;
[0022] The third and fourth terminals are respectively connected to the transmit / receive pins of the 485 transceiver.
[0023] In some specific embodiments, the 485 transceiver module further includes a second optocoupler, the two ends of which are used to connect to the enable control level and ground, and the two ends of which are connected to the second low-voltage power supply and the enable terminal of the 485 transceiver, respectively.
[0024] In some specific embodiments, the digital isolator is an NSi8221.
[0025] Compared with the prior art, the advantages and positive effects of this utility model are:
[0026] The battery management system wake-up device of this utility model sets up a wake-up module and a communication module connected to the wake-up module. Each battery pack management unit is connected in a daisy chain through each communication module. When each battery pack management unit is powered on, the wake-up module obtains the wake-up level according to the daisy chain communication sequence, realizing the sequential wake-up of each slave unit. The wake-up module is connected to the communication module, instead of the wake-up level of the next slave unit being issued by the already woken-up controller, which saves hardware resources and improves wake-up efficiency.
[0027] Other features and advantages of this utility model will become clearer after reading the specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the composition and connection structure of the battery management system wake-up device according to an embodiment;
[0030] Figure 2 This is a schematic diagram of the composition and connection structure of the battery management system wake-up device according to an embodiment;
[0031] Figure 3 This is a schematic diagram of the composition and connection structure of the battery management system wake-up device according to an embodiment;
[0032] Figure 4 This is a schematic diagram of the communication module of the battery management system wake-up device according to an embodiment, which is a CAN transceiver and its connection structure;
[0033] Figure 5 This is a schematic diagram of the communication module of the battery management system wake-up device according to an embodiment, which is a 485 transceiver and its connection structure.
[0034] Figure 6 This is a circuit diagram of the communication module according to an embodiment;
[0035] Figure 7 This is a schematic diagram of the communication module circuit according to an embodiment.
[0036] In the picture,
[0037] 1. Master unit; 2. Slave unit; 31. Control module; 32. Communication module; 321. First communication module; 322. Second communication module; 323. CAN transceiver module; 324. 485 transceiver module; 33. Wake-up module; 34. Energy storage battery;
[0038] U1, CAN transceiver; U2, first optocoupler; U3, digital isolator; U4, second optocoupler; U5, 485 transceiver; CANH, high-voltage communication line; CANL, low-voltage communication line; 485-A, A communication line; 485-B, B communication line; VCC1, first low-voltage power supply; VCC2, second low-voltage power supply. Detailed Implementation
[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0040] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0042] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
[0043] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0044] Reference Figure 1 This utility model discloses a battery management system wake-up device. The battery management system includes multiple battery pack management units for monitoring the corresponding battery packs. The wake-up device includes multiple communication modules 32 and multiple wake-up modules 33.
[0045] Each battery pack management unit is connected sequentially via each communication module 32 in a daisy chain manner to enable communication between adjacent battery pack management units.
[0046] Each battery pack management unit consists of one master unit 1 and multiple slave units 2. The battery pack management unit at the very front of the daisy chain is the master unit 1, and each battery pack management unit after the master unit 1 is a slave unit 2. The master unit 1 is in charge of monitoring and controlling each slave unit 2.
[0047] Each wake-up module 33 is connected to its corresponding communication module 32. When the adjacent battery pack management unit is powered on, the wake-up level is obtained from each communication module 32 to wake up the slave unit 2 located below it. The daisy chain connection method allows each wake-up module 33 to obtain the wake-up level in sequence, so that each slave unit 2 is woken up according to the daisy chain connection order.
[0048] The battery management system wake-up device of this utility model is provided with a communication module 32 and wake-up modules 33 connected to the communication module 32 respectively. Each communication module 32 is connected to each battery pack management unit in a daisy chain manner. When each battery pack management unit is powered on in sequence, each wake-up module 33 obtains the wake-up level from the communication module 32 in the order of the daisy chain, so as to realize the sequential wake-up of each slave unit 2. The wake-up module 33 is connected to the communication module 32, instead of the wake-up level of the next slave unit 2 being issued by the already woken-up controller, which saves hardware resources and improves wake-up efficiency.
[0049] The following detailed description of the specific composition, connection relationship and principle of the battery management system wake-up device of this utility model is provided through specific embodiments.
[0050] In some specific embodiments, refer to Figure 2 The battery pack management unit also includes a control module 31 and an energy storage battery 34; the control module 31 is connected to the energy storage battery 34 and is used to control its charging and discharging and monitor its charging and discharging status.
[0051] The control modules 31 of each battery pack management unit are connected sequentially in a daisy chain through each communication module 32 to realize communication between adjacent control modules 31, thereby realizing communication between control modules 31, and ultimately realizing the monitoring and overall control of each energy storage battery 34.
[0052] The wake-up module 33 is connected to the communication module 32 and the control module 31 respectively. When the adjacent battery pack management units are powered on, the wake-up level is obtained from each communication module 32 and output to the control module 31. Due to the daisy-chain communication method, the wake-up module 33 corresponding to each battery pack management unit obtains the wake-up level in sequence and outputs it to the corresponding control module 31, so that each slave unit 2 is woken up according to the connection order of the daisy chain.
[0053] In some specific embodiments, refer to Figure 2 , Figure 3 The communication module 32 includes a first communication module 321 and a second communication module 322; the first communication module 321 is communicatively connected to the preceding battery pack management unit, and the second communication module 322 is communicatively connected to the following battery pack management unit.
[0054] Specifically, the control module 31 of the battery pack management unit is connected to the second communication module 322 and the first communication module 321 respectively; the battery pack management unit in front communicates with the second communication module 322 connected to it and the first communication module 321 connected to the battery pack management unit in the back.
[0055] The wake-up module 33 is connected to the common terminal of the second communication module 322 and the first communication module 321, and obtains the level change generated by the communication signal sent by the preceding battery pack management unit, which is used as the wake-up level to wake up the subsequent battery pack management unit.
[0056] The wake-up method in this embodiment is applicable to the sequential wake-up of multiple devices communicating in a daisy-chain manner.
[0057] In some specific embodiments, refer to Figure 4 , Figure 6The first communication module 321 and the second communication module 322 are both CAN transceiver modules 323, which include a CAN transceiver U1; the CAN transceiver U1 used for communication between adjacent battery pack management units is connected through a high-voltage communication line CANH and a low-voltage communication line CANL.
[0058] The wake-up module 33 includes a first optocoupler U2, whose two ends of diode are respectively connected to the high-voltage communication line CANH and the low-voltage communication line CANL between the CAN transceiver U1 used for communication with the adjacent battery pack management unit. One end of its transistor is used to connect to the control module 31 and is connected to the first low-voltage power supply VCC1 through a resistor, and the other end of the transistor is grounded.
[0059] In this embodiment, when the preceding battery pack management unit communicates with the current battery pack management unit, especially during the first communication, there are high and low level changes on the high-voltage communication line CANH and the low-voltage communication line CANL between them. When the diode of the first optocoupler U2 is at a high level and the transistor is at a low level, respectively, the light is emitted, the transistor is turned on, and the wake-up level is low. Conversely, when the transistor is turned off, the wake-up level is high. When the wake-up level changes from low to high or from high to low, it is used to wake up the subsequent control module 31.
[0060] In some specific embodiments, refer to Figure 6 The first low-voltage power supply VCC1 is 3.3V, which is the operating voltage of the control module 31.
[0061] In some specific embodiments, refer to Figure 6 The CAN transceiver U1 model is TPT1255.
[0062] In some specific embodiments, refer to Figure 6 The first communication module 321 and the second communication module 322 also include a digital isolator U3, which is a dual-channel isolator with a first end, a second end, a third end, and a fourth end, used to isolate the signals transmitted by the first end and the second end from the signals transmitted by the third end and the fourth end; the first end and the second end are respectively used to connect to the control module 31; the third end and the fourth end are respectively connected to the transmit and receive pins of the CAN transceiver U1.
[0063] The battery management system wake-up device in this embodiment improves the EMC environment of the control module 31 and enhances its anti-interference capability by setting the digital isolator U3 to convert the operating voltage of the control module 31 to the communication voltage of the CAN transceiver U1, and isolates the control module 31 from the CAN transceiver U1, thereby improving the stability and reliability of the battery management system.
[0064] In some specific embodiments, refer to Figure 5 , Figure 7 The first communication module 321 and the second communication module 322 are both 485 transceiver modules 324, which include a 485 transceiver U5; the 485 transceiver U5 used for communication between adjacent battery pack management units is connected through communication line A 485-A and communication line B 485-B.
[0065] The wake-up module 33 includes a first optocoupler U2, whose two ends of diode are connected to the A communication line 485-A and the B communication line 485-B of the 485 transceiver U5 used for communication with the adjacent battery pack management unit, respectively. One end of its transistor is used to connect to the control module 31 and is connected to the first low-voltage power supply VCC1 through a resistor, and the other end of the transistor is grounded.
[0066] In this embodiment, when the preceding battery pack management unit communicates with the current battery pack management unit, especially during the first communication, there are high and low level changes on the A communication line 485-A and the B communication line 485-B between them. When the diode of the first optocoupler U2 is at a high level and the transistor is at a low level, respectively, the light is emitted, the transistor is turned on, and the wake-up level is low. Conversely, when the transistor is turned off, the wake-up level is high. When the wake-up level changes from low to high or from high to low, it is used to wake up the subsequent control module 31.
[0067] In some specific embodiments, refer to Figure 7 The first low-voltage power supply, VCC1, is 3.3V, which is the operating voltage of the control module.
[0068] In some specific embodiments, refer to Figure 7 The model number of the 485 transceiver U5 is TPT487.
[0069] In some specific embodiments, refer to Figure 7 The first communication module 321 and the second communication module 322 also include a digital isolator U3, which is a dual-channel isolator with a first end, a second end, a third end, and a fourth end, used to isolate the signals transmitted by the first end and the second end from the signals transmitted by the third end and the fourth end; the first end and the second end are respectively used to connect to the control module 31; the third end and the fourth end are respectively connected to the transmit and receive pins of the 485 transceiver U5.
[0070] The battery management system wake-up device in this embodiment improves the EMC environment of the control module 31 and enhances its anti-interference capability by setting the digital isolator U3 to convert the operating voltage of the control module 31 to the communication voltage of the 485 transceiver U5, and isolates the control module 31 from the 485 transceiver U5, thereby improving the stability and reliability of the battery management system.
[0071] In some specific embodiments, refer to Figure 7The first communication module 321 and the second communication module 322 also include a second optocoupler U4, the two ends of which are connected to the control module 31 and ground respectively; the two ends of which are connected to the second low-voltage power supply VCC2 and the enable terminal of the 485 transceiver U5 respectively.
[0072] In this embodiment, the 485 transceiver U5 of the battery management system wake-up device is controlled by the control module 31 to determine whether it is enabled. The second optocoupler U4 converts and isolates the operating voltage between the control module 31 and the 485 transceiver U5 to improve anti-interference capability.
[0073] In some specific embodiments, refer to Figure 6 , Figure 7 The second low-voltage power supply VCC2 is 5V, which is the operating voltage of CAN transceiver U1 and 485 transceiver U5; the digital isolator U3 adopts NSi8221 and is used to convert the 3.3V voltage level of the signal of control module 31 to the 5V voltage level of the signal of CAN transceiver U1 and 485 transceiver U5.
[0074] The digital isolator used in the battery management system wake-up device of this embodiment is model NSi8221, which has high reliability and features low power consumption, high electromagnetic interference immunity and low radiation. It is used for level conversion to improve the EMC performance of the battery management system wake-up device, thereby improving the reliability and stability of the battery management system.
[0075] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.
Claims
1. A battery management system wake-up device, characterized in that, The battery management system includes multiple battery pack management units; Each of the battery pack management units comprises a master unit and multiple slave units; the wake-up device includes multiple communication modules and multiple wake-up modules; the master unit and each of the slave units are connected sequentially in a daisy-chain manner through each of the communication modules; Each of the wake-up modules is connected to the corresponding communication module and is used to obtain the wake-up level according to the daisy chain connection order, so as to wake up each of the slave devices in sequence.
2. The battery management system wake-up device according to claim 1, characterized in that, The communication module includes a first communication module and a second communication module; the battery pack management unit is connected to the first communication module and the second communication module respectively; the second communication module corresponding to the preceding battery pack management unit is connected to the first communication module corresponding to the following battery pack management unit for communication between adjacent battery pack management units; The wake-up module is connected to the common terminal of the first communication module and the second communication module, and is used to wake up the slave device.
3. The battery management system wake-up device according to claim 2, characterized in that, Both the first communication module and the second communication module are CAN transceiver modules, which include CAN transceivers and are connected through high-voltage communication lines and low-voltage communication lines. The wake-up module includes a first optocoupler, whose two ends of the diode are respectively connected to the high-voltage communication line and the low-voltage communication line. One end of the transistor is connected to the first low-voltage power supply through a resistor and is used to output the wake-up level. The other end of the transistor is grounded.
4. The battery management system wake-up device according to claim 3, characterized in that, The CAN transceiver used is the TPT1255.
5. The battery management system wake-up device according to claim 3, characterized in that, The CAN transceiver module also includes a digital isolator, which is dual-channel and includes a first end, a second end, a third end, and a fourth end, used to isolate the signals transmitted by the first end and the second end from the signals transmitted by the third end and the fourth end; The third and fourth terminals are respectively connected to the transmit and receive pins of the CAN transceiver.
6. The battery management system wake-up device according to claim 2, characterized in that, Both the first communication module and the second communication module are 485 transceiver modules, which include 485 transceivers and are connected through communication lines A and B. The wake-up module includes a first optocoupler, whose two ends of the diode are respectively connected to the A communication line and the B communication line. One end of the transistor is connected to a first low-voltage power supply through a resistor and is used to output the wake-up level. The other end of the transistor is grounded.
7. The battery management system wake-up device according to claim 6, characterized in that, The 485 transceiver used is the TPT487.
8. The battery management system wake-up device according to claim 6, characterized in that, The 485 transceiver module also includes a digital isolator, which is dual-channel and includes a first end, a second end, a third end, and a fourth end, used to isolate the signals transmitted by the first end and the second end from the signals transmitted by the third end and the fourth end; The third and fourth terminals are respectively connected to the transmit / receive pins of the 485 transceiver.
9. The battery management system wake-up device according to claim 8, characterized in that, The 485 transceiver module also includes a second optocoupler, whose diode has two ends for connecting to the enable control level and ground, and whose transistor has two ends connected to the second low-voltage power supply and the enable terminal of the 485 transceiver, respectively.
10. The battery management system wake-up device according to claim 5 or 8, characterized in that, The digital isolator used is NSi8221.