BMS communication system and ESS communication system

Abstract

To provide a BMS communication system and an ESS communication system for wireless communication, that can perform efficient wireless communication from BMS to BMS.SOLUTION: A BMS communication system according to the present invention includes: a first printed circuit board 130 attached to one side of a housing of a battery module including a plurality of battery cells, electrically connected to a voltage sensing tab 170 of the battery cell, and including a temperature sensor 150 that measures the temperature of the battery cell; and a second printed circuit board 110 stacked on one surface of the first printed circuit board 130, electrically connected to the voltage sensing tab 170 and the temperature sensor 150, and including a cell sensing module that transmits and receives signals, in which an antenna pattern module is mounted on a surface.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a BMS communication system and an ESS communication system that perform wireless communication. [Background technology]

[0002] Secondary batteries are batteries that can be charged and discharged, unlike primary batteries, which cannot be recharged. Low-capacity secondary batteries are used in small portable electronic devices such as smartphones, feature phones, laptops, digital cameras, and camcorders, while large-capacity secondary batteries are widely used as motor drive power sources and power storage batteries in hybrid vehicles, electric vehicles, and the like. Such secondary batteries include an electrode assembly consisting of a positive electrode and a negative electrode, a case for accommodating the electrode assembly, and electrode terminals connected to the electrode assembly.

[0003] Since the Energy Storage System (ESS) system, which includes such secondary batteries, is an environment where there is a risk of signal interference due to the complex and numerous wiring installed, there was a need to connect communication between Battery Management Systems (BMS) wirelessly.

[0004] The information disclosed in the background of the invention above is intended to enhance understanding of the background of the invention and may therefore include information that does not constitute prior art. Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to provide a BMS communication system and an ESS communication system that communicate wirelessly.

[0006] However, the technical problems that the present invention aims to solve are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description of the present invention. [Means for solving the problem]

[0007] To solve the technical problems, according to one embodiment of the present invention, there is provided a BMS communication system including: a first printed circuit board mounted on one side of a housing of a battery module having a plurality of battery cells, electrically connected to voltage sensing tabs of the battery cells, and equipped with a temperature sensor that measures the temperature of the battery cells; and a second printed circuit board stacked on one side of the first printed circuit board, equipped with a cell sensing module that is electrically connected to the voltage sensing tabs and the temperature sensor to transmit and receive signals, and having an antenna pattern module mounted on a surface thereof.

[0008] According to one embodiment, the second printed circuit board is also a flexible printed circuit board (FPCB).

[0009] According to another example, the antenna pattern module may include an antenna having an inverted-F antenna (IFA) structure.

[0010] According to yet another example, the antenna pattern module may include an antenna operating in the 2.4 GHz band.

[0011] According to yet another example, the antenna pattern module may include an antenna having a pattern thickness of 0.18 mm mounted on the surface of the flexible printed circuit board.

[0012] According to yet another example, the antenna pattern module may include an antenna having an antenna horizontal portion having a length of 13.5 mm, an impedance matching portion having a length of 4.05 mm, and a length between the impedance matching portion and the antenna feed portion being 4.05 mm.

[0013] According to one embodiment of the present invention for solving the technical problems, there is provided an ESS communication system including a system BMS, a rack BMS, and a module BMS that communicate with each other within the ESS system, wherein the system BMS, the rack BMS, and the module BMS each include an antenna pattern module that enables wireless communication with each other, and the antenna pattern module includes an antenna mounted on a surface of a printed circuit board of each of the system BMS, the rack BMS, and the module BMS.

[0014] According to one embodiment, the printed circuit board is also a flexible printed circuit board (FPCB).

[0015] According to another example, the antenna pattern module may include an antenna having an inverted-F antenna (IFA) structure.

[0016] According to yet another example, the antenna pattern module may include an antenna operating in the 2.4 GHz band.

[0017] According to yet another example, the antenna pattern module may include an antenna having a pattern thickness of 0.18 mm mounted on the surface of the flexible printed circuit board.

[0018] According to yet another example, the antenna pattern module may include an antenna having an antenna horizontal portion having a length of 13.5 mm, an impedance matching portion having a length of 4.05 mm, and a length between the impedance matching portion and the antenna feed portion being 4.05 mm. [Effects of the Invention]

[0019] According to the present invention, in a BMS communication system and an ESS communication system that communicate wirelessly, communication between BMSs can be efficiently performed via wireless communication.

[0020] However, the effects obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned will be clearly understood by those skilled in the art from the following description of the invention. [Brief explanation of the drawings]

[0021] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention to be given later, serve to further understand the technical concept of the present invention. Therefore, the present invention should not be interpreted as being limited only to the matters depicted in such drawings. [Figure 1] 1 is a diagram illustrating an ESS communication system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a schematic view of a BMS communication system mounted on one side of a housing of a battery module according to an embodiment of the present invention. [Figure 3] 1 is a diagram schematically illustrating a printed circuit board on which an antenna pattern module according to an embodiment of the present invention is mounted; [Figure 4] 1 is a diagram schematically illustrating a printed circuit board on which an antenna pattern module according to an embodiment of the present invention is mounted; [Figure 5] 1 is a diagram schematically illustrating an antenna according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Prior to this, the terms and phrases used in the specification and claims should not be construed as being limited to their ordinary or dictionary meanings, but should be interpreted in terms of meanings and concepts consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concepts of terms in order to best describe his or her invention. Therefore, it should be understood that the embodiment and illustrated configurations described in this specification are merely the most preferred embodiment of the present invention and do not represent the technical spirit of the present invention. Therefore, it should be understood that various equivalents and modifications may exist as of the filing date of this application. Furthermore, as used in this specification, the terms "comprise" and / or "comprising" specify the presence of a stated shape, number, step, operation, member, element, and / or group thereof, but do not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements, and / or groups. Furthermore, when describing an embodiment of the present invention, the terms "may" and "is also" may include "one or more embodiments of the present invention."

[0023] In addition, to facilitate understanding of the invention, the accompanying drawings may not be drawn to scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be used to refer to the same components in different embodiments.

[0024] A statement that two comparison objects are "identical" means that they are "substantially identical." Therefore, "substantially identical" may include deviations that are considered low in the art, for example, deviations within 5%. Furthermore, uniformity of a parameter in a given region may mean uniformity on average.

[0025] Even if terms such as "first," "second," etc. are used to describe various elements, it is understood that these elements are not limited by these terms. These terms are used only to distinguish one element from another, and unless otherwise specified, it is understood that a first element is also a second element.

[0026] Throughout the specification, unless specifically stated to the contrary, each element may be singular or plural.

[0027] When an arbitrary structure is disposed "on top (or bottom)" of a component or "on (or under)" a component, it does not only mean that the arbitrary structure is disposed in contact with the upper surface (or lower surface) of the component, but also means that other structures may be interposed between the component and the arbitrary structure disposed on (or under) the component.

[0028] Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the components are directly coupled or connected to each other, but that other components may be "interposed" between the components, or that each component may be "coupled," "coupled," or "connected" through other components. Furthermore, when a component is described as being electrically coupled to another component, this includes not only direct coupling, but also coupling via an intermediate element.

[0029] Throughout the specification, "A and / or B" means A, B, or A and B, unless specifically stated to the contrary. That is, "and / or" includes all or any combination of the listed items. "C through D" means at least C and at most D, unless specifically stated to the contrary.

[0030] FIG. 1 is a diagram illustrating an ESS communication system according to an embodiment of the present invention.

[0031] Referring to FIG. 1, an ESS communication system according to an embodiment of the present invention may represent a communication system between a PMS (Power Management System) / EMS (Energy Management System), a system BMS (Battery Management System), a rack BMS, and a module BMS, which constitute an ESS system.

[0032] For example, as shown in FIG. 1 , a system BMS, a rack BMS, and a module BMS according to an embodiment of the present invention may be included in an ESS-integrated battery box 10. For example, the battery box 10 may represent a container-shaped box including a battery module, a BMS, a BCP, a cooling system, a fire extinguishing monitor, and a direct injection system. In this case, communication between the PMS / EMS and the system BMS is performed using TCP / IP communication, but communication between the system BMS, rack BMS, and module BMS within the battery box 10 may cause signal interference due to the complex and numerous wiring. To solve this problem, according to the present invention, communication between the system BMS, rack BMS, and module BMS may be performed using wireless communication.

[0033] For example, although FIG. 1 illustrates one battery box 10, an ESS communication system according to an embodiment of the present invention may include multiple battery boxes 10. For example, the number of battery racks included in one battery box 10 may vary from 1 to 150. Preferably, the number of battery racks may vary from 10 to 100. Each battery rack may include 11 battery modules, and each battery module may include 22 battery cells. Here, the module BMS may refer to a BMS that manages the battery modules, and the rack BMS may refer to a BMS that manages the battery rack. For example, the BMS may include a communication device, a detection device, a balancing device, a control device, etc.

[0034] For example, a BMS is a system that monitors the battery status and performs diagnostic, control, communication, and protection functions, calculating the charge / discharge status, calculating the battery life or state of health (SOH), cutting off battery power when necessary (relay control), controlling thermal management (cooling, heating, etc.), performing high-voltage interlock functions, and detecting or calculating insulation and short-circuit conditions.

[0035] According to an embodiment of the present invention, the system BMS, the rack BMS, and the module BMS may each include an antenna pattern module for wirelessly communicating with each other. For example, according to an embodiment of the present invention, the antenna pattern module may include an antenna mounted on the surface of a printed circuit board of each of the system BMS, the rack BMS, and the module BMS.

[0036] Conventionally, the battery box 10 is an enclosure ESS integrated battery box, which is a container type equipped with modules, BMS, BCP, cooling equipment, fire extinguishing monitoring, and direct injection systems. It is necessary to store cables and wiring ducts, such as power lines and communication lines, required for each system, in a small space, which is very complicated and may cause interference between signals. It is therefore a disadvantageous specification in terms of profitability compared to fixed ESS in terms of cost. Therefore, in order to improve functionality between systems and reduce profitability, a short-range (2.4GHz) wireless BMS needed to be developed. There was a need for wireless communication between BMSs to be efficient and reduce communication error rates.

[0037] According to the present invention, when applying an antenna for short-range communication, in order to reduce the module volume, an IFA (Inverted-F Antenna) pattern antenna is applied to an FPCB instead of the existing FR-4 Rigid PCB, thereby providing cost and space advantages.

[0038] According to the present invention, antenna pattern modules for short-range (2.4 GHz) wireless communication are installed in the module BMS, rack BMS, and system BMS, respectively, to overcome an environment that may cause signal interference due to the numerous wirings inside the battery box 10 and reduce communication errors. Furthermore, an IFA pattern antenna may be implemented in the FPCB to achieve spatial benefits. For example, wireless communication standards for the antenna pattern modules provided in the module BMS, rack BMS, and system BMS according to an embodiment of the present invention may include WirelessHART, IEEE802.15.4, BLE / BLE5.0, etc. Furthermore, wireless communication network configurations for the antenna pattern modules according to an embodiment of the present invention may include Mesh, Star, etc.

[0039] FIG. 2 is a diagram schematically illustrating a BMS communication system mounted on one side of a housing of a battery module according to an embodiment of the present invention.

[0040] A battery module according to an embodiment of the present invention may include a battery module housing having an accommodation space for accommodating at least one battery cell. The battery cells may be accommodated in a stacked form inside the housing. The battery cells may include a positive electrode lead and a negative electrode lead. The battery cells may be circular, rectangular, or pouch-shaped depending on the battery shape.

[0041] The battery module includes at least one battery cell, which may also be a rechargeable secondary battery. For example, the battery cell may include at least one selected from the group consisting of a nickel-cadmium battery, a lead-acid battery, a nickel metal hydride battery (NiMH), a lithium ion battery, a lithium polymer battery, etc. For example, the number and connection method of the battery cells included in the battery module may be determined based on the amount of power and voltage required for the battery module. For example, the battery cells may be connected in parallel or in a combination of series and parallel.

[0042] Referring to FIG. 2, a BMS communication system according to an embodiment of the present invention may include a first printed circuit board 130 and a second printed circuit board 110.

[0043] The first printed circuit board 130 may be mounted on one side of a housing of a battery module including a plurality of battery cells. For example, as shown in FIG. 2, the first printed circuit board 130 may be electrically connected to a voltage sensing tab 170 of the battery cell. The first printed circuit board 130 may also include a temperature sensor 150 that measures the temperature of the battery cell.

[0044] The second printed circuit board 110 may be stacked on one surface of the first printed circuit board 130. For example, as shown in FIG. 2, the second printed circuit board 110 may include a cell sensing module electrically connected to the voltage sensing tab 170 and the temperature sensor 150 to transmit and receive signals, and an antenna pattern module may be mounted on the surface of the second printed circuit board 110.

[0045] 3 and 4 are diagrams illustrating a printed circuit board on which an antenna pattern module according to an embodiment of the present invention is mounted, and FIG. 5 is a diagram illustrating an antenna according to an embodiment of the present invention.

[0046] First, referring to FIG. 3, a first printed circuit board 130 and a second printed circuit board 110 according to an embodiment of the present invention are schematically illustrated.

[0047] While conventional pattern antennas are mounted on FR-4 and rigid PCBs for RF signal matching, which are disadvantageous in terms of space and cost, the antenna pattern module according to the present invention is mounted on the surface of the second printed circuit board 110 and stacked vertically on one surface of the first printed circuit board 130, eliminating the need for a separate mounting hole and providing advantages in terms of space and cost. For example, the second printed circuit board 110 may be stacked in a structure in which it is connected between the first printed circuit board 130 and the second printed circuit board 110 by a vertical stiffener.

[0048] The second printed circuit board 110 according to an embodiment of the present invention may also be a flexible printed circuit board (FPCB). The first printed circuit board 130 and the second printed circuit board 110 according to an embodiment of the present invention may also be flexible printed circuit boards (FPCB).

[0049] 4, an antenna pattern module 115 mounted on the second printed circuit board 110 according to an embodiment of the present invention is schematically illustrated. For example, the antenna pattern module 115 may include an antenna including a conductive line mounted on the surface of the second printed circuit board 110.

[0050] The antenna pattern module 115 according to an embodiment of the present invention may include an antenna having an inverted-F antenna (IFA) structure. For example, referring to both Figures 4 and 5, the antenna pattern module 115 according to an embodiment of the present invention may include an antenna operating in the 2.4 GHz band.

[0051] 5, an antenna pattern module 115 according to an embodiment of the present invention may include an antenna having an antenna horizontal portion length L of 13.5 mm, an impedance matching portion length H of 4.05 mm, and a length D between the impedance matching portion and the antenna feed portion of 4.05 mm. Also, the antenna pattern module 115 may include an antenna having a pattern thickness W of 0.18 mm mounted on the surface of a flexible printed circuit board (FPCB).

[0052] In the case of conventional short-range 2.4GHz band wireless BMS, when applying Chip Type, Wire Type, and Pattern Type (MIFA, IFA) antennas to Rigid PCB (FR-4), performance could only be realized if the pattern thickness was designed to be 1mm or more, making it impossible to apply FPCB types. However, according to the present invention, by implementing pattern impedance matching of the antenna pattern module, it is possible to apply an IFA (Inverted-F Antenna) structure that applies the pattern thickness to the standard FPCB thickness (0.2mm or less), thereby ensuring performance similar to that of FR-4 application types.

[0053] Although the present invention has been described above using limited embodiments and drawings, it goes without saying that the present invention is not limited thereto, and that various modifications and variations can be made by a person having ordinary skill in the art to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the following claims.

[0054] The various embodiments described above may also be embodied in the form of a computer program executed by various components on a computer, and such a computer program may be recorded on a computer-readable medium. In this case, the medium may continuously store a computer-executable program or temporarily store it for execution or download. The medium may also be various recording or storage means in the form of a single piece of hardware or multiple pieces of hardware combined together. The medium is not limited to a medium directly connected to a specific computer system, but may also be distributed over a network. Examples of media include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs and DVDs; magneto-optical media such as floptical disks; and ROM, RAM, flash memory, and the like, configured to store program instructions. Other examples of media include recording or storage media managed by app stores that distribute applications, or by websites or servers that provide or distribute various software.

[0055] In this specification, the terms "module," "module," etc. may refer to a hardware component such as a processor or a circuit, and / or a software component executed by a hardware component such as a processor. For example, a "module," "module," etc. may be embodied by a component such as a software component, an object-oriented software component, a class component, or a task component, as well as a process, a function, an attribute, a procedure, a subroutine, a program code segment, a driver, firmware, microcode, a circuit, data, a database, a data structure, a table, an array, and a variable. [Explanation of symbols]

[0056] 10 Battery box 110 2nd printed circuit board 115 Antenna Pattern Module 130 1st printed circuit board 150 Temperature Sensor 170 Voltage Sensing Tab

Claims

1. a first printed circuit board mounted on one side of a housing of a battery module including a plurality of battery cells, electrically connected to a voltage sensing tab of the battery cell, and including a temperature sensor for measuring a temperature of the battery cell; a second printed circuit board having a cell sensing module laminated on one surface of the first printed circuit board and electrically connected to the voltage sensing tab and the temperature sensor to transmit and receive signals, and an antenna pattern module mounted on a surface thereof.

2. The BMS communication system of claim 1 , wherein the second printed circuit board is a flexible printed circuit board (FPCB).

3. The BMS communication system of claim 2 , wherein the antenna pattern module includes an antenna having an inverted-F antenna (IFA) structure.

4. The BMS communication system of claim 3 , wherein the antenna pattern module includes an antenna operating in the 2.4 GHz band.

5. The BMS communication system of claim 3 , wherein the antenna pattern module includes an antenna having a pattern thickness of 0.18 mm mounted on the surface of the flexible printed circuit board.

6. The antenna pattern module includes an antenna having an antenna horizontal portion having a length of 13.5 mm, an impedance matching portion having a length of 4.05 mm, and a length between the impedance matching portion and the antenna power supply portion being 4.05 mm. The BMS communication system of claim 5.

7. In an ESS communication system including a system BMS, a rack BMS, and a module BMS that communicate with each other within the ESS system, The system BMS, the rack BMS, and the module BMS each include an antenna pattern module that wirelessly communicates with each other; The antenna pattern module includes an antenna mounted on a surface of each of the printed circuit boards of the system BMS, the rack BMS, and the module BMS.

8. The ESS communication system of claim 7 , wherein the printed circuit board is a flexible printed circuit board (FPCB).

9. The ESS communication system of claim 8 , wherein the antenna pattern module includes an antenna having an inverted-F antenna (IFA) configuration.

10. 10. The ESS communication system of claim 9, wherein the antenna pattern module includes an antenna operating in the 2.4 GHz band.

11. The ESS communication system of claim 9 , wherein the antenna pattern module includes an antenna having a pattern thickness of 0.18 mm mounted on the surface of the flexible printed circuit board.

12. 12. The ESS communication system of claim 11, wherein the antenna pattern module includes an antenna having an antenna horizontal portion having a length of 13.5 mm, an impedance matching portion having a length of 4.05 mm, and a length between the impedance matching portion and the antenna feed portion being 4.05 mm.

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