Battery management system and electric vehicle

Abstract

The utility model relates to a battery management system and an electric vehicle. The battery management system includes: a near-field coupling line; the blade battery comprises at least one battery pack and a plurality of battery cell acquisition boards, each battery pack comprises a plurality of battery cells connected in series, each battery cell is integrated with a single battery cell acquisition board, and each battery cell acquisition board comprises an acquisition chip and an antenna electrically connected with the acquisition chip; wherein the antenna comprises a top radiating body arranged on the top surface of the cell acquisition board and a bottom radiating body arranged on the bottom surface of the cell acquisition board, the top radiating body and the bottom radiating body are connected in series, and the near-field coupling line is in coupled communication with the antenna.

Description

Technical Field

[0001] The present disclosure relates to the field of terminal technology, and in particular to a battery management system and an electric vehicle. Background Art

[0002] The Battery Management System (BMS) is a control system that ensures the safe use of power batteries. It can constantly monitor the battery's status and ensure the safe use of electric vehicles. Currently, some electric vehicle battery management systems are actively adopting wireless BMS in the hope of reducing wiring and simplifying the battery management system structure. Utility Model Content

[0003] The present disclosure provides a battery management system and an electric vehicle to address the deficiencies in the related art.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a battery management system, including:

[0005] near-field coupling lines;

[0006] The blade battery includes at least one battery pack and multiple battery cell acquisition boards. Each battery pack includes multiple battery cells connected in series. Each battery cell is integrated with a single battery cell acquisition board. Each battery cell acquisition board includes an acquisition chip and an antenna electrically connected to the acquisition chip.

[0007] The antenna includes a top radiator provided on the top surface of the cell collection board and a bottom radiator provided on the bottom surface of the cell collection board, the top radiator and the bottom radiator are connected in series, and the near-field coupling line is coupled and communicated with the antenna.

[0008] Optionally, the antenna includes a plurality of top radiators arranged in parallel, and two adjacent top radiators are electrically connected via a single bottom radiator.

[0009] Optionally, a plurality of the top radiators are symmetrically arranged.

[0010] Optionally, the cell collection board further includes metallized holes, each of which electrically connects the top radiator and the bottom radiator.

[0011] Optionally, at least part of the branches of each bottom radiator are arranged obliquely relative to the top radiator.

[0012] Optionally, the top radiator and the bottom radiator are electrically connected alternately.

[0013] Optionally, the length direction of the near-field coupling line is arranged parallel to the length direction of the top radiator.

[0014] Optionally, the near-field coupling line is arranged opposite to the top surface of the battery cell collection board, and the projection of the near-field coupling line on the top surface of the battery cell collection board is located between two top radiators.

[0015] Optionally, the multiple cells of each battery pack are stacked along the thickness direction of the cells, the cell collection board is integrated into the side of each cell parallel to the thickness direction of the cells, and the width direction of the cell collection board is parallel to the thickness direction of the cells.

[0016] According to a second aspect of the embodiments of the present disclosure, there is provided an electric vehicle comprising a battery management system as described in any one of the above embodiments.

[0017] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0018] It can be seen from the above embodiments that the antenna in the present disclosure is provided with a top radiator on the top surface of the battery cell collection board and a bottom radiator on the bottom surface of the battery cell collection board. When the area requirements for the antenna are the same, it is beneficial to reduce the area requirements for the battery cell collection board, which is beneficial to the miniaturization of the battery cell collection board, thereby enabling better integration with battery cells with smaller thicknesses.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] Figure 1 The figure is a partial schematic diagram of a battery management system according to an exemplary embodiment.

[0022] Figure 2 The figure is a three-dimensional schematic diagram of a battery management system according to an exemplary embodiment.

[0023] Figure 3 The figure is a top schematic diagram of a battery cell collection board according to an exemplary embodiment.

[0024] Figure 4 The figure is a bottom schematic diagram of a battery cell collection board according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0026] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0027] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0028] Figure 1 is a partial schematic diagram of a battery management system according to an exemplary embodiment. Figure 2 FIG is a perspective diagram of a battery management system according to an exemplary embodiment. Figure 1 and Figure 2 As shown, the battery management system includes a near-field coupling line 1 and a blade battery 2. The blade battery 2 includes two battery packs 21 and multiple cell acquisition boards 22. Each battery pack 21 includes multiple cells 211 connected in series. A single cell acquisition board 22 is integrated on each cell 211. The cell acquisition board 22 on each cell 211 can collect the voltage and temperature of a single cell. By integrating the cell acquisition board 22 on each cell 211, electronic label management of each cell 211 can be achieved. In addition, by integrating the cell acquisition board 22 on each cell 211, since the voltage of each cell 211 will not be too high, for example, less than 4.2V (volts), there will be no problem of abnormally high voltage of the cell 211 due to connection problems, so the safety is better.

[0029] The multiple cells 211 of each battery pack 21 can be stacked along the thickness direction of the cells, with the positive and negative poles of adjacent cells 211 arranged opposite each other. Adjacent cells 211 can be connected in series via metal components. The cell collection board 22 can be integrated into the side of each cell 211 parallel to the thickness direction. For example, the cell collection board 22 can be integrated into the side of each cell 211 along the width or length direction. The width direction of the cell collection board 22 is parallel to the thickness direction of the cell 211.

[0030] Each cell acquisition board 22 can couple and communicate with the near-field coupling line 1, thereby transmitting the signal parameters collected by the cell acquisition board 22 to the near-field coupling line 1. Of course, the received signal instructions can also be transmitted to the cell acquisition board 22 through the near-field coupling line 1, that is, each cell acquisition board 22 can be in a two-way communication mode with a single near-field coupling line 1. For example, Figure 3 As shown, each battery cell acquisition board 22 may include an acquisition chip 221 and an antenna 222, and the antenna 222 is connected to the acquisition chip 221. For example, the antenna 222 can be set on the surface of the battery cell acquisition board 22 away from the battery cell 211, which is conducive to the antenna 222 being set toward the near-field coupling line 1, so that the parameter information collected by the acquisition chip can be modulated and sent from the antenna through the coupling communication between the antenna 222 and the near-field coupling line 1, or the acquisition chip can obtain the demodulated control information through the antenna. For example, the acquisition chip on the battery cell acquisition board 122 of the present application adopts near-field radio frequency communication technology (NFC, Near Field Communication), so that it has stronger anti-interference ability and enhanced data reliability, thereby having better security, robustness, and interference resistance. At the same time, the transmission power of the near-field radio frequency is low, which can better reduce energy consumption.

[0031] like Figure 3 and Figure 4 As shown, the antenna 222 includes a top radiator 223 and a bottom radiator 224. The top radiator 223 is arranged on the top surface of the battery cell collection board 22, and the bottom radiator 224 is arranged on the bottom surface of the battery cell collection board 22. The top radiator 223 and the bottom radiator 224 are connected in series. The electrical signal subsequently fed into the antenna 222 can excite currents on both the top radiator 223 and the bottom radiator 224, forming an electromagnetic wave signal that couples and communicates with the near-field coupling line 1. The way the antenna 222 is arranged on the top and bottom surfaces of the battery cell collection board 22 respectively is conducive to reducing the area requirements of the battery cell collection board 22 and is conducive to the miniaturization of the battery cell collection board 22, thereby achieving better integration with the battery cell 211 with a smaller thickness. Of course, a matching circuit can also be electrically connected to the antenna 222, and the matching circuit is matched with the electrical length of the antenna to match the target resonance.

[0032] In some embodiments, the antenna includes a plurality of top radiators 223 arranged in parallel, and two adjacent top radiators 223 are connected in series through a single bottom radiator 224, for example Figure 3 As shown in FIG, the two top radiators 223 located at the bottom are connected in series through an inclined bottom radiator 224. The inclined arrangement of the bottom radiator 224 is conducive to increasing the area of ​​the antenna 222, thereby increasing the coupling area between the antenna 222 and the near-field coupling line 1, and improving the communication effect. Among them, each bottom radiator 224 can be arranged with its entire branch tilted relative to the top radiator 223, or it can also be arranged with part of its branch tilted relative to the top radiator 223, for example Figure 3 In the embodiment, the bottom radiator 224 electrically connected to the two middle top radiators is partially tilted with the top radiator 223, and partially tilted with the top radiator 223. In this way, the radiation area of ​​the antenna 222 can be increased by bending the bottom radiator 224.

[0033] In some embodiments, multiple top radiators 223 can be symmetrically arranged. These top radiators 223 are located on the surface of the cell collection board 22 facing away from the cell 211. This symmetrical arrangement of the top radiators 223 improves neatness. In some embodiments, the cell collection board 22 also includes metallized holes, each of which electrically connects the top radiator 223 to the bottom radiator 224. This eliminates the need for external wires to achieve electrical connection between the top radiators 223 and the bottom radiator 224, optimizing the layout of the cell collection board 22.

[0034] In some embodiments, the top radiator 223 and the bottom radiator 224 are electrically connected alternately, that is, an electrical connection method of top radiator 223-metallized hole-bottom radiator 224-metallized hole-top radiator 223-metallized hole-bottom radiator 224... is adopted to realize the utilization of each top radiator 223 and each bottom radiator 224, so that they can all be excited to generate electric current to generate electromagnetic waves.

[0035] In each of the above embodiments, the length direction of the near-field coupling line 1 is arranged parallel to the length direction of the top radiator 223, which is beneficial to increasing the coupling area between the near-field coupling line 1 and the antenna 222. In some embodiments, the near-field coupling line 1 is arranged directly opposite the side of the battery cell collection board 22, which is beneficial to placing the near-field coupling line 1 close to both the top radiator 223 and the bottom radiator 224, thereby increasing the coupling area and further miniaturizing the battery cell collection board 22. Alternatively, in other embodiments, the near-field coupling line 1 is arranged directly opposite the top surface of the battery cell collection board 22, and the projection of the near-field coupling line 1 on the top surface of the battery cell collection board 22 is located between the two top radiators 223, which is beneficial to placing the near-field coupling line 1 relatively close to the middle of the multiple top radiators 223.

[0036] It will be understood that the above are merely some illustrative embodiments of the battery management system of the present application. Without departing from the creative essence of the present application, some structures of the battery management system 100 of the present application may be subjected to equivalent or similar transformations, which will all be covered by the scope of protection defined by the claims attached to the present application.

[0037] The present application also provides an electric vehicle, which includes the battery management system described above.

[0038] The electric vehicle of the present application can have similar beneficial technical effects as the battery management system described above, so they will not be described in detail here.

[0039] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0040] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery management system, characterized in that: include: near-field coupling lines; The blade battery includes at least one battery pack and multiple battery cell acquisition boards. Each battery pack includes multiple battery cells connected in series. Each battery cell is integrated with a single battery cell acquisition board. Each battery cell acquisition board includes an acquisition chip and an antenna electrically connected to the acquisition chip. The antenna includes a top radiator provided on the top surface of the cell collection board and a bottom radiator provided on the bottom surface of the cell collection board, the top radiator and the bottom radiator are connected in series, and the near-field coupling line is coupled and communicated with the antenna.

2. The battery management system according to claim 1, characterized in that: The antenna comprises a plurality of top radiators arranged in parallel, and two adjacent top radiators are electrically connected via a single bottom radiator.

3. The battery management system according to claim 2, characterized in that: The plurality of top radiators are symmetrically arranged.

4. The battery management system according to claim 2, characterized in that: The cell collection board further includes metallized holes, each of which electrically connects the top radiator and the bottom radiator.

5. The battery management system according to claim 2, characterized in that: At least part of the branches of each bottom radiator are arranged obliquely relative to the top radiator.

6. The battery management system according to claim 2, characterized in that: The top radiators and the bottom radiators are electrically connected alternately.

7. The battery management system according to claim 2, characterized in that: The length direction of the near-field coupling line is arranged in parallel with the length direction of the top radiator.

8. The battery management system according to claim 7, characterized in that: The near-field coupling line is arranged opposite to the top surface of the battery cell collection board, and the projection of the near-field coupling line on the top surface of the battery cell collection board is located between the two top radiators.

9. The battery management system according to claim 1, characterized in that: The multiple cells of each battery pack are stacked along the cell thickness direction, the cell collection board is integrated into the side of each cell parallel to the cell thickness direction, and the width direction of the cell collection board is parallel to the thickness direction of the cell.

10. An electric vehicle, characterized in that: The battery management system comprises the battery management system according to any one of claims 1 to 9.

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