Battery management system for energy storage based on wireless communication

Abstract

The utility model discloses a battery management system for energy storage based on wireless communication, which comprises a three-level framework which is divided into a first-level slave control, a second-level cluster control and a third-level domain control, wherein each of the first-level slave control, the second-level cluster control and the third-level domain control comprises a corresponding controller and a wireless communication unit, and wireless communication is established through the wireless communication unit corresponding to each level; the first-level slave controller is also connected with an external battery module, and the third-level domain controller is also interacted with an external EMS (Energy Management System); the system has the beneficial effects that the system establishes communication links among all levels through a wireless networking mode, so that complicated wire harness connection and networking complexity are avoided, the stability and the safety are improved, and the cost is saved; and meanwhile, the workload of field installation is effectively saved, so that the aim of reducing the complexity and cost of system networking is fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, and in particular to a battery management system for energy storage based on wireless communication. Background Art

[0002] At present, we are facing the green and low-carbon transformation of the power system and the transformation of the energy structure. The proportion of new energy power in the power structure is gradually increasing. Due to the large fluctuations and uncertainty of new energy output, it does not match the power load curve, which in turn increases the regulation burden of conventional power sources. During the low load period, the output of new energy is large, which makes it difficult to peak the power system; during the peak load period, the output level of new energy is low, which requires the power grid to take orderly power consumption measures. Renewable energy power generation requires different peak and frequency regulation methods, and energy storage can be used as an important tool for peak and frequency regulation of new energy power.

[0003] The proportion of lithium battery energy storage systems has been growing rapidly year by year. The degree of electrification is getting higher and higher. The wiring harnesses in lithium battery energy storage systems are becoming more and more complicated. The high-voltage wiring harnesses and low-voltage wiring harnesses are intricate. This not only affects the safety of the system, but also increases the cost of using the wiring harnesses and reduces production efficiency.

[0004] Therefore, the research on battery management system based on wireless communication is of great significance in improving safety, reducing wiring harnesses and reducing system costs. Utility Model Content

[0005] In view of the defects in the prior art, the utility model provides a battery management system for energy storage based on wireless communication to reduce the complexity and cost of wiring harness networking.

[0006] The utility model provides a battery management system for energy storage based on wireless communication, including a three-level architecture, which is divided into a first-level slave control, a second-level cluster control and a third-level domain control; wherein the first-level slave control, the second-level cluster control and the third-level domain control all include corresponding controllers and wireless communication units, and establish wireless communication through the corresponding wireless communication units at each level;

[0007] The first-level slave controller is also connected to an external battery module, and the third-level domain controller also interacts with an external EMS.

[0008] Further, the first-level slave control includes a plurality of slave controllers, each of which is electrically coupled to the battery module one-to-one, and each slave controller further includes a corresponding sensing unit for measuring an operating parameter of the battery module and a first wireless communication unit for wirelessly transmitting the operating parameter to the second-level cluster control;

[0009] The second-level cluster control includes a plurality of battery clusters, each battery cluster includes a corresponding cluster controller and a second wireless communication unit, each cluster controller is connected to a plurality of slave controllers, and the second-level cluster control communicates wirelessly with the third-level domain control;

[0010] The third-level domain controller includes a domain controller and a corresponding third wireless communication unit. Each cluster controller is communicatively connected to the domain controller, and the domain controller also interacts with an external EMS.

[0011] Furthermore, the slave controller, cluster controller and domain controller are all pre-cured with a frequency hopping frequency set for establishing a wireless channel, and the frequency range of each channel is different.

[0012] Furthermore, the sensing unit includes a plurality of different types of sensors to sense the state of the battery module.

[0013] Furthermore, both the slave controller and the cluster controller adopt MCU.

[0014] Furthermore, the cluster controller at least outputs a first signal for triggering the first-level slave controller to perform sensing and a second signal for interacting with the third-level domain controller.

[0015] Furthermore, the first signal and the second signal are both radio frequency signals and are in separate frequency ranges.

[0016] Furthermore, the sensor includes at least a voltage sensor, a current sensor and a temperature sensor.

[0017] Furthermore, the battery clusters are connected in parallel.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a battery management system for energy storage based on wireless communication. The system establishes communication links between various levels by means of wireless networking, thus avoiding complicated wiring harness connections and the complexity of networking, which not only increases stability and safety but also saves costs; at the same time, it also effectively saves the workload of on-site installation, thereby achieving the purpose of reducing the complexity and cost of system networking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0021] Figure 1The utility model shows a principle block diagram of a battery management system for energy storage based on wireless communication. DETAILED DESCRIPTION

[0022] 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 part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0024] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. It should also be further understood that the term "and / or" used in the utility model specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0026] like Figure 1 As shown, a principle block diagram of a battery management system for energy storage based on wireless communication provided by the utility model is shown, including a three-level architecture, divided into a first-level slave control, a second-level cluster control and a third-level domain control; wherein the first-level slave control, the second-level cluster control and the third-level domain control all include corresponding controllers and wireless communication units, and establish wireless communication through the corresponding wireless communication units at each level;

[0027] The first-level slave controller is also connected to an external battery module, and the third-level domain controller also interacts with an external EMS.

[0028] In this embodiment, the first-level slave control includes a plurality of slave controllers, each of which is electrically coupled to a battery module one-to-one, and each of which further includes a corresponding sensing unit for measuring an operating parameter of the battery module and a first wireless communication unit for wirelessly transmitting the operating parameter to the second-level cluster control;

[0029] The second-level cluster control includes a plurality of battery clusters, each battery cluster includes a corresponding cluster controller and a second wireless communication unit, each cluster controller is connected to a plurality of slave controllers, and the second-level cluster control communicates wirelessly with the third-level domain control; the battery clusters are connected in parallel with each other;

[0030] The third-level domain controller includes a domain controller and a corresponding third wireless communication unit. Each cluster controller is communicatively connected to the domain controller, and the domain controller also interacts with an external EMS.

[0031] Thereby, the first-level slave controller is communicatively connected with the second-level cluster controller, the second-level cluster controller is communicatively connected with the third-level domain controller, and then the working parameters are sent to the third-level domain controller.

[0032] It should be noted that the first level slave control Figure 1 The first level has the same meaning as the second level, and the slave controller is Figure 1 The second-level cluster control and Figure 1 The second level has the same meaning as in Figure 1 The third level in has the same meaning.

[0033] Furthermore, the slave controller, cluster controller and domain controller are all pre-cured with a frequency hopping frequency set for establishing a wireless channel, and the frequency range of each channel is different.

[0034] That is, the system uses the frequencies in the frequency hopping frequency set to establish a communication link for data transmission, and monitors whether the communication link is normal; if it is normal, a control signal containing frequency hopping information is transmitted through the communication link; if it is abnormal, the corresponding controllers on both sides of the communication link try to rebuild the communication link through the information in the preset frequency hopping frequency set.

[0035] In this embodiment, the controllers on both sides of the communication link are based on this solution, including controllers on both sides between the third level and the second level, and controllers on both sides between the second level and the first level.

[0036] The domain controller is at the third level, receiving the battery information sent by the second-level cluster controller and the IO information collected by itself;

[0037] The cluster controller at least outputs a first signal for triggering the first-level slave controller to perform sensing and a second signal for interacting with the third-level domain controller; the first signal and the second signal are both radio frequency signals and are in separate frequency ranges.

[0038] In this embodiment, the sensing unit includes a plurality of different types of sensors to sense the state of the battery module;

[0039] Specifically, the sensor includes at least a voltage sensor, a current sensor and a temperature sensor; it should be noted that the above is only an example and is not intended to be limiting.

[0040] The above solution establishes communication links between various levels through wireless networking, avoiding complicated wiring harness connections and the complexity of networking, which not only increases stability and safety, but also saves costs; at the same time, it also effectively saves the workload of on-site installation, thereby achieving the purpose of reducing the complexity and cost of system networking.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A battery management system for energy storage based on wireless communication, characterized in that: It includes a three-level architecture, which is divided into a first-level slave control, a second-level cluster control and a third-level domain control; wherein the first-level slave control, the second-level cluster control and the third-level domain control all include corresponding controllers and wireless communication units, and establish wireless communication through the corresponding wireless communication units at each level; The first-level slave controller is also connected to an external battery module, and the third-level domain controller also interacts with an external EMS.

2. A battery management system for energy storage based on wireless communication as claimed in claim 1, characterized in that: The first-level slave control includes a plurality of slave controllers, each of which is electrically coupled to a battery module one-to-one, and each of which further includes a corresponding sensing unit for measuring an operating parameter of the battery module and a first wireless communication unit for wirelessly transmitting the operating parameter to the second-level cluster control; The second-level cluster control includes a plurality of battery clusters, each battery cluster includes a corresponding cluster controller and a second wireless communication unit, each cluster controller is connected to a plurality of slave controllers, and the second-level cluster control communicates wirelessly with the third-level domain control; The third-level domain controller includes a domain controller and a corresponding third wireless communication unit. Each cluster controller is communicatively connected to the domain controller, and the domain controller also interacts with an external EMS.

3. A battery management system for energy storage based on wireless communication as claimed in claim 2, characterized in that: The slave controller, cluster controller and domain controller are all pre-cured with a frequency hopping frequency set for establishing a wireless channel, and the frequency range of each channel is different.

4. A battery management system for energy storage based on wireless communication as claimed in claim 3, characterized in that: The sensing unit includes a plurality of different types of sensors to sense the state of the battery module.

5. A battery management system for energy storage based on wireless communication as claimed in claim 4, characterized in that: The slave controller and the cluster controller both adopt MCU.

6. A battery management system for energy storage based on wireless communication as claimed in claim 5, characterized in that: The cluster controller at least outputs a first signal for triggering the first-level slave controller to perform sensing and a second signal for interacting with the third-level domain controller.

7. A battery management system for energy storage based on wireless communication as claimed in claim 6, characterized in that: The first signal and the second signal are both radio frequency signals and are in separate frequency ranges.

8. A battery management system for energy storage based on wireless communication as claimed in claim 7, characterized in that: The sensors include at least a voltage sensor, a current sensor and a temperature sensor.

9. A battery management system for energy storage based on wireless communication as claimed in any one of claims 1 to 8, characterized in that: The battery clusters are connected in parallel.

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