Battery management system

Abstract

The utility model provides a battery management system, and relates to the technical field of energy storage equipment. The battery management system comprises battery clusters, a high-voltage box and a confluence cabinet, the battery clusters collect current through the confluence cabinet and are connected with an energy storage converter through the high-voltage box, a slave control of each battery cluster is connected with a corresponding master control, the master control of one battery cluster serves as a master control, and the master control of the other battery cluster serves as a master control. And the master controller of each battery cluster is arranged in the high-voltage box. According to the battery management system provided by the utility model, the master controllers of the battery clusters are arranged in the high-voltage box, and one master controller is used as a master controller, so that the battery management system only has two-stage control, the master controllers have the functions of a BCU (Basic Control Unit) and a BAU (Basic Access Unit), the BAU does not need to be arranged in the convergence cabinet, the work of the BAU is finished by the master controller arranged in the high-voltage box, and the cost of components is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage device technical field especially relates to a battery management system. BACKGROUND

[0002] Energy storage technology has significant advantages in improving energy utilization efficiency, enhancing grid stability, reducing operating costs, supporting renewable energy development, improving energy security and environmental protection and energy saving. With the continuous progress of technology and the reduction of cost, energy storage technology will play a more important role in future energy systems. The battery management system BMS of the universal energy storage system is divided into three levels, from low to high, located in the battery box, the high voltage box and the busbar cabinet, and the component cost is high. SUMMARY

[0003] The utility model provides a battery management system to solve the defect that the component cost of battery management system in prior art is high.

[0004] The utility model provides a battery management system, including battery cluster, high voltage box and busbar cabinet, the battery cluster is gathered through the busbar cabinet and is connected with energy storage converter through the high voltage box, the slave control of each battery cluster is connected with the corresponding master control, and the master control of one battery cluster is used as the total control, wherein, the master control of each battery cluster is arranged in the high voltage box.

[0005] According to the battery management system provided by the utility model, the air conditioning communication port, the liquid cooling communication port and the fire fighting communication port are connected with the master control through the communication terminal row.

[0006] According to the battery management system provided by the utility model, the communication terminal row is installed in the busbar cabinet, and the high voltage box is connected with the communication terminal row through the twisted pair wire.

[0007] According to the battery management system provided by the utility model, the air conditioning communication port, the liquid cooling communication port and the fire fighting communication port of multiple battery clusters are connected in parallel.

[0008] According to the battery management system provided by the utility model, the master control of one battery cluster closest to the busbar cabinet in multiple battery clusters is used as the total control.

[0009] According to the battery management system provided by the utility model, the busbar cabinet is installed with the circuit breaker, the circuit breaker has the opening relay and the closing relay, and the opening relay and the closing relay are connected with the master control respectively.

[0010] According to the battery management system, the plurality of battery clusters adopt centralized energy storage, the circuit breaker is provided with only one, and the total control is connected with the opening relay and the closing relay.

[0011] According to the battery management system, each battery cluster comprises a plurality of battery boxes connected in series, each battery box has a plurality of battery modules connected in series, and the battery cores in the battery modules are connected in parallel.

[0012] According to the battery management system, the plurality of battery clusters adopt group string type energy storage, each battery cluster is provided with one busbar cabinet, each busbar cabinet is provided with one circuit breaker, and the opening relay and the closing relay are connected with the corresponding main control.

[0013] According to the battery management system, each battery cluster comprises a plurality of battery boxes connected in series, each battery box has a plurality of battery modules connected in series, and the battery cores in the battery modules are connected in parallel.

[0014] The battery management system provided by the utility model, the main control of the battery cluster is installed in the high-voltage box, one of the main controls serves as the total control, so that the battery management system has only two-level control, the main control has the functions of BCU and BAU, and the BAU does not need to be arranged in the busbar cabinet, the work of the original BAU is completed by the main control arranged in the high-voltage box, and the cost of components is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0016] Figure 1 It is the structure schematic view of the battery management system provided by the utility model.

[0017] Figure 2 It is the structure schematic view of the battery management system provided by the utility model and adopting group string type energy storage.

[0018] Figure 3 It is another structure schematic view of the battery management system provided by the utility model and adopting group string type energy storage.

[0019] Figure 4The utility model provides a battery management system adopts centralized energy storage's structure schematic view.

[0020] Figure 5 The utility model provides a battery management system adopts another structure schematic view of centralized energy storage.

[0021] Reference signs:

[0022] 10, battery cluster;11, slave control;12, master control;13, battery module;20, high voltage box;30, busbar cabinet;40, energy storage converter. DETAILED DESCRIPTION

[0023] In order to make the utility model's purpose, technical scheme and advantage more clear, below, combining with the drawing in the utility model, the technical scheme in the utility model is clearly and completely described, obviously, the described embodiment is the embodiment of the utility model part, instead of all the embodiment.Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor all belong to the range of the utility model protection.

[0024] The feature of the term "first", "second" in the specification and claims of the utility model can be explicitly or implicitly include one or more features.In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two.In addition, "and / or" in the specification and claims means at least one of the connected objects, character " / ", generally indicates that the front and rear associated objects are a kind of "or" relationship.

[0025] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0026] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral connection;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication.For ordinary skilled person in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.

[0027] The utility model discloses a battery management system. Figures 1-5 The utility model discloses a battery management system.

[0028] As Figures 1 to 5 The utility model provides a kind of battery management system, it includes battery cluster 10, high voltage box 20 and confluence cabinet 30.Battery cluster 10 is gathered current by confluence cabinet 30 and is connected with energy storage converter 40 by high voltage box 20, the slave 11 of each battery cluster 10 is connected with corresponding master 12, and the master 12 of one battery cluster 10 is as total control.Each battery cluster 10 The master 12 of each battery cluster 10 is arranged in high voltage box 20.

[0029] As Figure 1 The utility model discloses a kind of battery management system, it includes battery cluster 10, high voltage box 20 and confluence cabinet 30.Battery cluster 10 is gathered current by confluence cabinet 30 and is connected with energy storage converter 40 by high voltage box 20, the slave 11 of each battery cluster 10 is connected with corresponding master 12, and the master 12 of one battery cluster 10 is as total control.Each battery cluster 10 The master 12 of each battery cluster 10 is arranged in high voltage box 20.

[0030] Confluence cabinet 30 is used to gather battery cluster 10 output current.Confluence cabinet 30 is located at the output end of battery cluster 10, responsible for gathering the current of multiple battery clusters 10 and is transmitted to subsequent equipment by direct current cable.Each battery cluster 10 is installed in confluence cabinet 30 Direct current protection and switching device, for cooperating battery management system realizes the safe parallel connection of battery, fault isolation agent Fault recovery after re-investment.High voltage box 20 is the high voltage loop management module of connecting battery cluster 10 and energy storage converter 40, can realize the voltage / current acquisition of battery cluster 10, contactor control and protection, etc.

[0031] The master control 12 needs to control the pre-charging circuit in the high-voltage box 20 and the charging and discharging and communication of the battery cluster 10, and is not unique in number, and is installed in the high-voltage box 20. Among them, the communication of air conditioning, liquid cooling, fire fighting and the like is accessed to the master control 12 in the high-voltage box 20, and does not need to pass through the BAU in the bus cabinet 30. The battery management system provided in the embodiment of the utility model has only two levels of control, the master control 12 has the functions of BCU and BAU, and the BAU does not need to be arranged in the bus cabinet 30, and the work of the BAU originally is completed by the master control 12 arranged in the high-voltage box 20, thereby reducing the cost of components.

[0032] Specifically, the battery cluster 10 includes an air conditioning communication port, a liquid cooling communication port and a fire fighting communication port, and the air conditioning communication port, the liquid cooling communication port and the fire fighting communication port are connected to the master control 12 through a communication terminal row.

[0033] The number of communication interfaces of the master control 12 is limited, and after being arranged in the high-voltage box 20, a larger or more interface needs to be installed in the high-voltage box 20, and therefore the communication terminal row is arranged to facilitate the air conditioning communication port, the liquid cooling communication port and the fire fighting communication port to be introduced into the high-voltage box 20 and connected to the master control 12. Optionally, the communication terminal row is arranged in the bus cabinet 30, and the high-voltage box 20 is connected to the communication terminal row through a twisted pair, so that the bus cabinet 30 is arranged similarly to the conventional scheme and has the communication terminal row, and the high-voltage box 20 can be connected to the communication terminal row through a twisted pair. Among them, the air conditioning communication port, the liquid cooling communication port and the fire fighting communication port of the plurality of battery clusters 10 are arranged in parallel and connected to the master control 12.

[0034] In an optional embodiment, the master control 12 of one of the plurality of battery clusters 10 closest to the bus cabinet 30 is used as a master control. Of course, the master control can also be the master control 12 of any other battery cluster 10.

[0035] Among them, the bus cabinet 30 is provided with a circuit breaker, and the circuit breaker is provided with a tripping relay and a closing relay, and the tripping relay and the closing relay are connected to the master control 12.

[0036] Since there is no BAU in the system, the master control 12 needs to control the tripping and closing of the circuit breaker in the bus cabinet 30. The tripping and closing coil of the circuit breaker is generally AC 200V, and the master control 12 generally only has DC 24V voltage output, so an intermediate relay is needed for transition. The circuit breaker is respectively provided with a tripping relay for tripping and a closing relay for closing, and the tripping relay and the closing relay are arranged in the bus cabinet 30, and the relay coil needs to be connected to the master control 12 in the high-voltage box 20, and the auxiliary passive normally open point is connected to the tripping and closing circuit of the circuit breaker in the bus cabinet 30.

[0037] In a specific embodiment, as shown in Figure 4 and Figure 5As shown, the plurality of battery clusters 10 adopts centralized energy storage, and only one circuit breaker is provided, and the total control is connected with the tripping relay and the closing relay. Specifically, each battery cluster 10 includes a plurality of battery boxes connected in series, each battery box has a plurality of battery modules 13 connected in series, the battery cells in the battery module 13 are connected in parallel, and the plurality of battery clusters 10 are connected in parallel and connected with the same energy storage converter 40. Among them, each battery cluster 10 is controlled by a single energy storage converter 40, and there is only one circuit breaker in the busbar cabinet 30, and the total control controls the tripping relay and the closing relay of the circuit breaker and receives the information transmitted by the energy storage converter 40. In the battery management system of centralized energy storage, a pre-charging circuit needs to be configured in the high-voltage box 20 to ensure that the voltage difference between each battery cluster 10 is not less than 15v, and the influence of circulating current is reduced. The plurality of battery clusters 10 adopts centralized energy storage, the control is simple, the equipment cost is low, and the system space and land occupation are saved. However, in this embodiment, all battery clusters 10 are synchronously charged and discharged, the charging point is affected by the single cluster, and there is circulating current between the battery clusters 10, which affects the service life.

[0038] In yet another embodiment, as shown in Figure 2 and Figure 3 , the plurality of battery clusters 10 adopts group string energy storage, each battery cluster 10 is configured with a busbar cabinet 30, each busbar cabinet 30 is provided with a circuit breaker, and the tripping relay and the closing relay are connected with the corresponding master control 12. Specifically, each battery cluster 10 includes a plurality of battery boxes connected in series, each battery box has a plurality of battery modules 13 connected in series, the battery cells in the battery module 13 are connected in parallel, and each battery cluster 10 is connected with an energy storage converter 40. In this embodiment, each battery cluster 10 is controlled by a separate energy storage converter 40 and a circuit breaker, each master control 12 needs to separately control the tripping relay, the closing relay and the corresponding energy storage converter 40 in the corresponding busbar cabinet 30 for information transmission, and there is no need to configure a pre-charging circuit between the battery clusters 10, saving the space in the high-voltage box 20. The plurality of battery clusters 10 connected in the group string energy storage mode has long service life, high use efficiency, good reliability, convenient maintenance and good expansibility. However, each battery cluster 10 is connected with an energy storage converter 40, and a busbar cabinet 30 with a circuit breaker is provided, which has high cost, many connections and complex system.

[0039] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery management system, characterized by, The battery cluster, the high-voltage box and the busbar cabinet are included, the battery cluster collects current through the busbar cabinet and connects with the energy storage converter through the high-voltage box, the slave control of each battery cluster is connected with the corresponding master control, one of the master controls of the battery cluster serves as the general control, and the master control of each battery cluster is arranged in the high-voltage box.

2. The battery management system of claim 1, wherein, The battery cluster includes an air conditioner communication port, a liquid cooling communication port and a fire-fighting communication port, and the air conditioner communication port, the liquid cooling communication port and the fire-fighting communication port are connected with the master control through a communication terminal row.

3. The battery management system of claim 2, wherein, The communication terminal row is installed in the busbar cabinet, and the high-voltage box is connected with the communication terminal row through a twisted pair line.

4. The battery management system of claim 2, wherein, The air conditioner communication ports, the liquid cooling communication ports and the fire-fighting communication ports of a plurality of battery clusters are arranged in parallel.

5. The battery management system of claim 1, wherein, The master control of one of the battery clusters closest to the busbar cabinet among a plurality of battery clusters serves as the general control.

6. The battery management system of claim 1, wherein, The busbar cabinet is provided with a circuit breaker, and the circuit breaker is provided with a tripping relay and a closing relay, and the tripping relay and the closing relay are connected with the master control.

7. The battery management system of claim 6, wherein, A plurality of battery clusters adopt centralized energy storage, the circuit breaker is provided with only one, and the general control is connected with the tripping relay and the closing relay.

8. The battery management system of claim 7, wherein, Each battery cluster includes a plurality of battery boxes connected in series, each battery box has a plurality of battery modules connected in series, and the battery cells in the battery modules are connected in parallel.

9. The battery management system of claim 6, wherein, A plurality of battery clusters adopt group string energy storage, each battery cluster is provided with one busbar cabinet, each busbar cabinet is provided with one circuit breaker, and the tripping relay and the closing relay are connected with the corresponding master control.

10. The battery management system of claim 9, wherein, Each battery cluster includes a plurality of battery boxes connected in series, each battery box has a plurality of battery modules connected in series, and the battery cells in the battery modules are connected in parallel, and each battery cluster is connected with one energy storage converter.

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