Wireless battery management system and battery pack including same

Abstract

A wireless battery management system and a battery pack including the same may be provided. The wireless battery management system can comprise a mainboard, wherein an integrated circuit used for detecting state data of a battery module is arranged on the mainboard; and an antenna plate on which an antenna for wirelessly transmitting state data of the battery module is disposed, and which is combined to the main plate at a predetermined angle.

Description

Technical Field

[0001] The present disclosure relates to a wireless battery management system and a battery pack including the wireless battery management system. Background Art

[0002] Recently, wireless battery management system (BMS) technology has been attracting much attention in constructing battery packs for electric vehicles.

[0003] Wireless BMS can eliminate wiring and multiple wire harnesses that require high maintenance costs. Therefore, the volume of the battery pack can be reduced, the weight of the electric vehicle can be reduced, and the vehicle efficiency can be improved. However, according to the environmental characteristics inside the vehicle, the temperature may rise and the electromagnetic noise may increase, and the electromagnetic waves generated by the wireless BMS may affect nearby integrated circuits. Therefore, measures for electromagnetic wave shielding of the wireless BMS are required. Summary of the Invention

[0004] At least one of the embodiments can provide a wireless battery management system and a battery pack including the wireless battery management system, which minimizes the transmission of electromagnetic wave signals generated by an antenna to an integrated circuit.

[0005] According to an embodiment, a wireless battery management system can be provided. The wireless battery management system may include: a main board on which an integrated circuit for detecting status data of a battery module is provided; and an antenna board on which an antenna for wirelessly transmitting the status data of the battery module is provided, and the antenna board is combined with the main board at a predetermined angle.

[0006] The wireless battery management system may further include a guiding member including a first part and a second part, the first part being combined with an edge of the main board, and the second part extending at a predetermined angle with respect to the first part and being combined with the antenna board.

[0007] The wireless battery management system may further include: a bonding layer provided between one surface of the second part and the antenna board.

[0008] The first part may include: a first extension part combined with a first edge of the main board and extending along a first direction; and a second extension part combined with a second edge of the main board different from the first edge and extending along a second direction different from the first direction.

[0009] The wireless battery management system may further include: a flexible printed circuit board (FPCB) connected between the integrated circuit and the antenna.

[0010] The FPCB may pass through the second part.

[0011] The FPCB can surround at least a part of the second portion.

[0012] The predetermined angle can be greater than 0 degrees and less than 180 degrees.

[0013] According to another embodiment, a battery pack can be provided. The battery pack can include: a battery module; and a battery management system including: a main board on which an integrated circuit for detecting status data of the battery module is provided; and an antenna board combined with the main board at a predetermined angle, and an antenna for wirelessly transmitting the status data of the battery module is provided on the antenna board.

[0014] The battery management system can further include a guiding member including a first portion and a second portion, the first portion being combined with an edge of the main board, and the second portion extending at a predetermined angle with respect to the first portion and being combined with the antenna board.

[0015] The battery management system can further include: a bonding layer provided between one surface of the second portion and the antenna board.

[0016] The battery management system can further include: a flexible printed circuit board (FPCB) connected between the integrated circuit and the antenna.

[0017] The predetermined angle can be greater than 0 degrees and less than 180 degrees. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a diagram schematically showing a battery pack according to an embodiment.

[0019] Figure 2 shows Figure 1 the BMS shown in

[0020] Figure 3 is a schematic front view of an antenna board according to an embodiment.

[0021] Figure 4 is a front view showing the position of the antenna board in the BMS from according to an embodiment.

[0022] Figure 5 is a plan view showing the position of the antenna board in the BMS from according to an embodiment.

[0023] Figure 6 shows Figure 4 and Figure 5 a view of the first portion of the guiding member shown in DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the exemplary implementations to those skilled in the art. The drawings and description are to be regarded as illustrative rather than restrictive. Throughout the specification, the same reference numerals represent the same elements. In the flowcharts described with reference to the drawings in this specification, the order of operations may be changed, several operations may be combined, some operations may be divided, and specific operations may not be performed.

[0025] Throughout the specification and claims, if a component is referred to as "comprising" an element, this may mean that it may further comprise other elements rather than excluding other elements, unless otherwise specifically stated.

[0026] In addition, expressions described in the singular may be interpreted in the singular or plural, unless an explicit expression such as "one" or "single" is used.

[0027] In addition, terms including ordinal numbers, such as "first", "second", etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are only used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present disclosure, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element.

[0028] In addition, if a component is referred to as "connected" to another component, it includes not only the case where the two components are "directly connected", but also the case where the two components are "indirectly or non - contact connected" with another component intervening between the two components, or the case where the two components are "electrically connected". On the other hand, if an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between.

[0029] Figure 1 is a diagram schematically showing a battery pack according to an embodiment.

[0030] Refer to Figure 1 , the battery pack 10 may be installed in various power devices (such as electric vehicles) that use the electric energy stored in the battery pack 10.

[0031] The battery pack 10 may include a plurality of battery modules 20a, 20b, and 20c connected in series with each other, a plurality of slave battery management systems (BMSs) 100a, 100b, and 100c, and a main BMS 200. For ease of explanation, Figure 1 three battery modules 20a, 20b, and 20c in the battery pack 10 are shown.

[0032] Multiple battery modules 20a, 20b, and 20c can be connected to a charging device or a load through system terminals T+ and T-, and can be charged by the charging device or discharged by the load.

[0033] The battery modules 20a, 20b, and 20c can each include a plurality of battery cells electrically connected in series and / or in parallel.

[0034] Multiple slave BMSs 100a, 100b, and 100c can correspond to the multiple battery modules 20a, 20b, and 20c included in the battery pack 10.

[0035] Multiple slave BMSs 100a, 100b, and 100c can be electrically connected to the corresponding battery modules 20a, 20b, and 20c, respectively. For example, the slave BMS 100a can be electrically connected to the battery module 20a, the slave BMS 100b can be electrically connected to the battery module 20b, and the slave BMS 100c can be electrically connected to the battery module 20c.

[0036] Multiple slave BMSs 100a, 100b, and 100c can respectively detect the overall states of the battery modules 20a, 20b, and 20c, and perform various control functions to regulate the states of the battery modules 20a, 20b, and 20c. The states can include cell voltage, module voltage, module current, and temperature, etc., and the control functions can include charge control, discharge control, balance control, etc. The control functions can be directly executed by the slave BMSs 100a, 100b, and 100c based on the states of the battery modules 20a, 20b, and 20c, or can be executed according to commands from the master BMS 200.

[0037] The master BMS 200 can be connected to the multiple slave BMSs 100a, 100b, and 100c using a wireless network as the connection method.

[0038] The master BMS 200 can receive the state information of the battery modules 20a, 20b, and 20c from the multiple slave BMSs 100a, 100b, and 100c, and can perform control functions such as state of charge (SOC) control, power control, cell balance control, fault diagnosis control, cooling control, and thermal runaway detection control. In addition, the master BMS 200 can control a relay for supplying or blocking the power of the battery modules 20a, 20b, and 20c to the load based on the state information of the battery modules 20a, 20b, and 20c.

[0039] Through the wireless connection between the master BMS 200 and the multiple slave BMSs 100a, 100b, and 100c, the communication wiring complexity can be reduced, the volume of the battery pack 10 can be decreased, and the cost of the battery pack 10 can also be reduced.

[0040] Figure 2 is shown Figure 1 in the figure from the BMS

[0041] See Figure 2 , the slave BMS 100a may include an integrated circuit (IC) (e.g., an analog front end (AFE) IC 110), a microcontroller unit (MCU) 120, a wireless transceiver 130, and an antenna 140. Although for convenience, the slave BMS 100a is shown in Figure 2 , the slave BMSs 100b, 100c may also be configured to be the same as or similar to the slave BMS 100a

[0042] The AFE IC 110 may detect status data or status information such as voltage, current, and temperature of the battery module 20a, and control the charging, discharging, and / or balancing of the battery module 20a. The AFE IC 110 may transmit the detected status information of the battery module 20a to the MCU 120

[0043] The MCU 120 may control the operation of the AFE IC 110. The MCU 120 may transmit the status information of the battery module 20a to the wireless transceiver 130. In addition, the MCU 120 may receive a control signal from the master BMS 200 from the wireless transceiver 130, and may control or command the AFE IC 110 according to the control signal of the master BMS 200, and may transmit the control signal of the master BMS 200 to the AFE IC 110

[0044] The wireless transceiver 130 may perform wireless signal processing on the status information of the battery module 20a, so that the status information of the battery module 20a can be transmitted through the antenna 140. In addition, the wireless transceiver 130 may perform signal processing on the control signal of the master BMS 200 received through the antenna 140, and may transmit it to the MCU 120. Since the wireless transceiver 130 can directly transmit signals to the antenna 140 and can directly receive signals from the antenna 140, the wireless transceiver 130 may perform signal amplification and frequency conversion processing through a power amplifier or a low noise amplifier

[0045] Generally, the main board of the slave BMS 100a ( Figure 2 not shown in the figure) may be mounted on the battery housing surrounding the battery module 20a. The AFE IC 110, MCU 120, wireless transceiver 130, and antenna 140 of the slave BMS 100a may be provided on the main board. In some embodiments, like the AFE IC 110 and the MCU 120, the AFE IC 110 and the antenna 140 may be provided on the same surface of the main board. The AFE IC 110 and the antenna 140 may be placed adjacent to each other

[0046] Meanwhile, in the wireless BMS structure, electromagnetic waves can be generated through signal transmission and reception between the antenna 140 of the BMS100a and the antenna of the main BMS 200. Since the AFE IC 110 and the antenna 140 are disposed on the same surface of the main board, these electromagnetic waves may affect the AFE IC 110 and the AFE ICs of the surrounding slave BMSs 100b and 100c, and detection errors of the AFE IC 110 may occur.

[0047] According to an embodiment, in order to reduce the influence of electromagnetic waves caused by signal transmission and signal reception from the antenna 140 to the AFE IC 110, the antenna 140 may be mounted on a separate antenna board. In some embodiments, the wireless BMS (e.g., the slave BMS) of the present disclosure may include a main board and an antenna board. An integrated circuit for detecting status data of the battery module may be disposed on the main board, and an antenna for wirelessly transmitting the status data of the battery module may be disposed on the antenna board, and the antenna board may be combined with the main board at a predetermined angle. That is, the main board on which the integrated circuit (e.g., the AFE IC 110) and the MCU 120 are disposed and the antenna board on which the antenna 140 is disposed may be separate and independent boards. According to an embodiment, the AFE IC 110 and the antenna 140 may not be disposed on the same board, so that the signal from the antenna 140 does not affect the AFE IC 110 mounted on the main board. In addition, according to an embodiment, by providing a member for blocking electromagnetic waves on the antenna board, the signal from the antenna 140 can be prevented from being transmitted to the main board. This embodiment will be described in detail with reference to Figure 3 and Figure 4 This embodiment will be described in detail.

[0048] Figure 3 is a schematic front view of an antenna board according to an embodiment.

[0049] Referring to Figure 3 , the antenna 140 and the wireless transceiver 130 may be disposed on one surface of the antenna board 300. In Figure 3 , for ease of explanation, the wireless transceiver 130 is shown as a box. However, various elements constituting the wireless transceiver 130 may exist, and the various elements may be disposed on the antenna board 300.

[0050] In addition, a connector 150 for connecting to the MCU 120 disposed on the main board may be disposed on the antenna board 300.

[0051] Figure 4 is a front view showing the position of the antenna board in the slave BMS according to an embodiment, Figure 5 is a plan view showing the position of the antenna board in the slave BMS according to an embodiment.Figure 6 is a view showing Figure 4 and Figure 5 a first portion of the guiding member shown in

[0052] Referring to Figure 4 , the main board 400 and the antenna board 300 may be combined at a predetermined angle θ. For example, one surface of the main board 400 and another surface of the antenna board 300 adjacent to the one surface of the main board 400 may form a predetermined angle θ with each other. In some embodiments, a guiding member may further be included in the BMS. The guiding member may be combined with an edge of the main board 400 such that the antenna board 300 may be combined with the main board 400 at a predetermined angle θ.

[0053] In some embodiments, the guiding member may include a first portion 320 and a second portion 330. The first portion 320 of the guiding member may be combined with an edge of the main board 400, and the second portion 330 of the guiding member may extend in the Z-axis direction. The second portion 330 may be a plate-shaped member parallel to the YZ plane (i.e., the plane defined by the Y-axis direction and the Z-axis direction), and the second portion 330 extends at a predetermined angle θ with respect to the first portion 320 and is combined with the antenna board 300. Here, the predetermined angle θ may be greater than 0 degrees and less than 180 degrees.

[0054] In some embodiments, as Figure 6 shown in Figure 4 , the first portion 320 may include a first extension portion 322 and a second extension portion 324. The first extension portion 322 may be combined with a first edge of the main board 400 and may extend in a first direction (e.g., the X-axis direction). The second extension portion 324 may be combined with a second edge of the main board 400 and may extend in a second direction (e.g., the Y-axis direction). Since the second portion 330 is a plate-shaped member parallel to the YZ plane, the first portion 320 may extend in the X-axis direction and the Y-axis direction and be combined with the main board 400 to reduce the impact in the X-axis direction. As

[0055] In some embodiments, the slave BMS may further include a bonding layer 310 disposed between one surface of the second part 330 and the antenna board 300. One surface of the second part 330 combined with the main board 400 may be combined with the other surface of the antenna board 300 through the bonding layer 310. The bonding layer 310 may be a layer containing an adhesive. That is, the other surface of the antenna board 300 may be parallel to the YZ plane. In some embodiments, an electromagnetic wave blocking layer (not shown) may be combined with the other surface of the antenna board 300, and the electromagnetic wave blocking layer may be combined with the second part 330. The electromagnetic wave blocking layer may contain a ferrite material.

[0056] In some embodiments, the slave BMS may further include a flexible printed circuit board (FPCB) 410 connected between an integrated circuit disposed on the main board 400 and an antenna 140 disposed on the antenna board 300. As Figure 5 shown, a connector 150 disposed on one surface of the antenna board 300 and an MCU 120 disposed on the main board 400 may transmit and receive signals through the flexible printed circuit board (FPCB) 410. In some embodiments, one connector terminal of the FPCB 410 may be connected to the connector 150, and the other connector terminal may be connected to a connector 420 that is connected to the MCU 120. For example, the FPCB 410 may extend from the main board 400 through the second part 330 and along the side surface of the antenna board 300 to be disposed on one surface of the antenna board 300. As another example, the FPCB 410 may extend along the side surface of the antenna board 300 to at least partially surround the second part 330 from the main board 400, and may be disposed on one surface of the antenna board 300.

[0057] In this way, the antenna 140 may be disposed on one surface of the antenna board 300, and the second part 330 may be combined with the other surface of the antenna board 300, so that the second part 330 and the antenna board 300 may reflect the signal of the antenna 140 transmitted to the other surface of the antenna board 300. Therefore, the signal of the antenna 140 may not be transmitted to the AFE IC 110 disposed on the main board 400. In addition, since the electromagnetic wave blocking layer may be combined with the antenna board 300, the signal from the antenna 140 may not be transmitted to the main board 400.

[0058] According to at least one of the embodiments, the electromagnetic wave influence caused by the wireless BMS may be reduced.

[0059] Although the embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present disclosure defined in the claims are also included in the present disclosure.

[0060] <Description of Reference Numerals>

[0061] 10: Battery Pack

[0062] 100a, 100b, 100c: from BMS

[0063] 110: AFE IC

[0064] 120: MCU

[0065] 130: Wireless transceiver

[0066] 140: Antenna

[0067] 200: Main BMS

Claims

1. A wireless battery management system, comprising: A mainboard, on which an integrated circuit for detecting status data of a battery module is arranged; and An antenna board is provided with an antenna for wirelessly transmitting the status data of the battery module, and the antenna board is combined to the main board at a predetermined angle.

2. The wireless battery management system according to claim 1, further comprising: The guide member includes a first portion combined to an edge of the main board and a second portion extending at the predetermined angle with respect to the first portion and combined to the antenna board.

3. The wireless battery management system according to claim 2, further comprising: A bonding layer is disposed between one surface of the second portion and the antenna board.

4. The wireless battery management system according to claim 2, wherein The first part includes: A first extending portion, combined to a first edge of the main board and extending along a first direction; and The second extending portion is combined to a second edge of the main board different from the first edge and extends along a second direction different from the first direction.

5. The wireless battery management system according to claim 2, further comprising: A flexible printed circuit board is connected between the integrated circuit and the antenna.

6. The wireless battery management system according to claim 5, wherein The flexible printed circuit board passes through the second portion.

7. The wireless battery management system according to claim 5, wherein The flexible printed circuit board surrounds at least a portion of the second portion.

8. The wireless battery management system according to claim 1, wherein The predetermined angle is greater than 0 degree and less than 180 degrees.

9. A battery pack comprising: Battery module; and A battery management system comprises: a mainboard, on which an integrated circuit for detecting status data of a battery module is arranged; and an antenna board which is combined to the main board at a predetermined angle, and on which an antenna for wirelessly transmitting the status data of the battery module is disposed.

10. The battery pack according to claim 9, wherein The battery management system further includes a guide member including a first portion combined to an edge of the main board and a second portion extending at the predetermined angle with respect to the first portion and combined to the antenna board.

11. The battery pack according to claim 10, wherein The battery management system further comprises: A bonding layer is disposed between one surface of the second portion and the antenna board.

12. The battery pack according to claim 10, wherein The battery management system further comprises: A flexible printed circuit board is connected between the integrated circuit and the antenna.

13. The battery pack according to claim 9, wherein The predetermined angle is greater than 0 degree and less than 180 degrees.

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