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 battery assembly comprises a plurality of battery cells and a plurality of battery cell acquisition boards, the plurality of battery cells are connected in series, a single battery cell acquisition board is integrated on each battery cell, and each battery cell acquisition board comprises an acquisition chip and an antenna in coupled communication with the near-field coupling line; the antenna is arranged on the surface of the battery cell acquisition board and is electrically connected with the acquisition chip, and at least part of the antenna is of a bent structure.

Description

Technical Field

[0001] The present disclosure relates to the technical field of terminals, and particularly to a battery management system and an electric vehicle. Background Art

[0002] A battery management system (BMS) is a control system for protecting the safe use of power batteries. The battery management system can be used to monitor the usage status of the batteries at all times, providing guarantee for the safe use of electric vehicles. Currently, some electric vehicle battery management systems actively adopt wireless BMSs in the hope of reducing wire harnesses and simplifying the structure of the battery management system. Utility Model Content

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

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

[0005] A near-field coupling line;

[0006] A battery assembly, including a plurality of battery cells and a plurality of battery cell acquisition boards. The plurality of battery cells are connected in series, and each of the battery cells integrates a single battery cell acquisition board. Each battery cell acquisition board includes an acquisition chip and an antenna that couples and communicates with the near-field coupling line. The antenna is disposed on the surface of the battery cell acquisition board and is electrically connected to the acquisition chip. At least a part of the antenna is arranged in a bent structure.

[0007] Optionally, the length direction of the antenna is parallel to the length direction of the near-field coupling line, and the bent structure extends along the length direction of the antenna.

[0008] Optionally, the antenna includes a plurality of sub-segment antennas arranged side by side, and the adjacent sub-segment antennas are connected end to end, and at least one sub-segment antenna is a bent trace.

[0009] Optionally, at least one sub-segment antenna includes a first extension area, a second extension area and a connection area. The first extension area and the second extension area are arranged in parallel and are spaced apart in the side-by-side direction of the sub-segment antenna. The connection area connects the first extension area and the second extension area.

[0010] Optionally, the connection area is inclined with respect to the side-by-side direction.

[0011] Optionally, in the extension direction of the sub-segment antenna, the first extension area and the second extension area are alternately arranged.

[0012] Optionally, the adjacent sub-segment antennas are connected in an arc.

[0013] Optionally, the adjacent sub-segment antennas are symmetrically arranged.

[0014] Optionally, the multiple battery cells are arranged in multiple rows, each row of battery cells is arranged side by side in the thickness direction of the battery cell, the battery cell acquisition board is integrated on the side surface of each battery cell parallel to the thickness direction of the battery cell, and the antenna is arranged on the surface of the battery cell acquisition board facing away from the battery cell.

[0015] According to a second aspect of the embodiments of the present disclosure, there is provided an electric vehicle including the battery management system according to any one of the above embodiments.

[0016] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0017] As can be seen from the above embodiments, the present disclosure can increase the coupling area between the antenna and the near-field coupling line by increasing the antenna area, so as to improve the communication effect of the coupling communication; and by the way of increasing the coupling area in the present disclosure, it is more conducive to the communication between the battery cell acquisition board integrated with small-sized battery cells and the near-field coupling line.

[0018] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0020] Figure 1 FIG. is a partial schematic diagram of a battery management system shown according to an exemplary embodiment.

[0021] Figure 2 FIG. is a three-dimensional partial schematic diagram of a battery management system shown according to an exemplary embodiment.

[0022] Figure 3 FIG. is a schematic diagram of a battery cell acquisition board shown according to an exemplary embodiment.

[0023] Figure 4 FIG. is a partial schematic diagram of another battery management system shown according to an exemplary embodiment.

[0024] Figure 5 FIG. is a schematic structural diagram of an antenna shown according to an exemplary embodiment. DETAILED DESCRIPTION

[0025] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0026] The terms used in the present disclosure are for the purpose of describing particular embodiments only and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly dictates 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 the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0028] Figure 1 is a partial schematic diagram of a battery management system shown according to an exemplary embodiment. Figure 2 is a three-dimensional schematic diagram of a battery management system shown according to an exemplary embodiment. As Figure 1 and Figure 2 shown, the battery management system includes a near-field coupling line 1 and a battery assembly 2. The battery assembly 2 includes two rows of battery cells 21 and a plurality of battery cell acquisition boards 22. The battery cells 21 in the same row are connected in series, and the battery cells 21 in different rows are electrically connected in series. A single battery cell acquisition board 22 is integrated on each battery cell 21, and the battery cell acquisition board 22 on each battery cell 21 can acquire the voltage and temperature of a single battery cell. By integrating the battery cell acquisition board 22 on each battery cell 21, electronic tagging management of each battery cell 21 can be achieved. In addition, by integrating the battery cell acquisition board 22 on each battery cell 21, since the voltage of each battery cell 21 is not too high, for example, less than 4.2V (volts), there will be no problem of abnormal high voltage of the battery cell 21 caused by connection problems, so the safety is better.

[0029] Among them, a plurality of battery cells 21 in each row can be stacked along the thickness direction of the battery cell, the positive and negative electrodes between two adjacent battery cells 21 are arranged in opposite directions, and two adjacent battery cells 21 can be conductively connected in series through a metal part. The battery cell acquisition board 22 can be integrated on the side surface of each battery cell 21 parallel to the thickness direction. For example, the battery cell acquisition board 22 can be integrated on the side surface in the width direction or the side surface in the length direction of each battery cell 21.

[0030] Each battery cell acquisition board 22 can be coupled and communicated with the near-field coupling line 1, so as to transmit the signal parameters collected by the battery cell acquisition board 22 to the near-field coupling line 1. Of course, the received signal instruction can also be transmitted to the battery cell acquisition board 22 through the near-field coupling line 1, that is, a two-way communication mode can be adopted between each battery cell acquisition board 22 and the single near-field coupling line 1. For example, as Figure 3 shown, each battery cell acquisition board 22 can include an acquisition chip 221 and an antenna 222. The antenna 222 is connected to the acquisition chip 221. For example, the antenna 222 can be arranged on the surface of the battery cell acquisition board 22 facing away from the battery cell 21, which is beneficial for the antenna 222 to face the near-field coupling line 1, so as to perform coupling communication between the antenna 222 and the near-field coupling line 1, so that the parameter information collected by the acquisition chip can be modulated and emitted from the antenna, 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 disclosure adopts near-field radio frequency communication technology (NFC, Near Field Communication), so that the anti-interference ability is stronger, the reliability of the data is enhanced, and thus better safety, robustness, anti-interference ability, etc. are achieved. At the same time, the transmission power of the near-field radio frequency is low, which can better reduce energy consumption.

[0031] In this embodiment, at least a part of the antenna 222 is arranged in a bent structure. In this way, when the length requirement of the antenna 222 is limited, it is beneficial to increase the coupling area between the antenna 222 and the near-field coupling line 1 by increasing the antenna area, so as to improve the communication effect of the coupling communication; moreover, since the area of the battery cell acquisition board is limited by the thickness of the battery cell 21, the area of the battery cell acquisition board 22 that can be integrated on the small-sized battery cell 21 is small. Therefore, by the way of increasing the coupling area in the present disclosure, it is more beneficial to the communication between the battery cell acquisition board 22 integrated on the small-sized battery cell 21 and the near-field coupling line 1. Among them, the antenna 222 can be a metal trace on the surface of the battery cell acquisition board 22, such as a copper foil trace.

[0032] In the embodiment of the present disclosure, taking the battery management system including two rows of battery cells 21 as an example for illustration, in other embodiments, the number of rows of the battery cells 21 can be designed according to actual situations. For example, it can include a single row of battery cells or three or more rows of battery cells 21. The present disclosure does not limit this. Similarly, inFigure 1 and Figure 2 In the embodiment shown, the battery management system may also include four near-field coupling lines 1, which are coupled to the cell acquisition boards 22 of two rows of cells 21 through the four near-field coupling lines 1, and each cell acquisition board 22 may be coupled to an adjacent near-field coupling line 1. In another embodiment, as Figure 4 shown, the battery management system uses a single near-field coupling line 1 to wind around multiple rows of cells 21 to be coupled to the cell acquisition board 22 of each cell 21.

[0033] In the above embodiment, the length direction of the antenna 222 is arranged parallel to the length direction of the near-field coupling line 1, and the bent structure of the antenna 222 extends along the length direction of the antenna 222. In other words, as Figure 1 shown, the length direction of the antenna 222 is arranged horizontally, and the antenna 222 extends in the horizontal direction, so as to increase the effective coupling area between the antenna 222 and the near-field coupling line 1.

[0034] In some cases, as Figure 3 shown, the antenna 222 may be a section of antenna extending in the length direction. In other cases, as Figure 5 shown, the antenna 222 may include a plurality of sub-section antennas 223 arranged side by side, the adjacent sub-section antennas 223 are connected end to end, and at least one of the sub-section antennas 223 is a bent trace. For example Figure 5 shown, the antenna 222 includes two sub-section antennas 223, the two sub-section antennas 223 are connected, and both of the two sub-section antennas 223 are bent traces. Based on this, by designing at least one sub-section antenna 223 as a bent trace, the coupling area between the antenna 222 and the near-field coupling line 1 can be further increased.

[0035] Among them, the adjacent sub-section antennas 223 may be connected in an arc shape. Compared with the straight connection method, the area of the antenna 222 can be increased under the condition of equal intervals, which is beneficial to increasing the coupling area between the antenna 222 and the near-field coupling line 1. Of course, the adjacent sub-section antennas 223 may also be connected in a straight line to simplify the process. The adjacent sub-section antennas 223 may be symmetrically arranged, so as to improve the aesthetics and be beneficial to reducing the design cost.

[0036] In some embodiments, the at least one sub-section antenna 223 includes a first extension area 224, a second extension area 225 and a connection area 226. The first extension area 224 and the second extension area 225 are arranged in parallel and are spaced apart in the side-by-side direction of the sub-section antenna 223. For example Figure 5As shown, two sub-segment antennas 223 are arranged side by side in the left-right direction, the first extension region 224 and the second extension region 225 are arranged at intervals in the left-right direction, and the first extension region 224 and the second extension region 225 are connected by a connection region 226. In this way, by arranging the first extension region 224 and the second extension region 225 in a line segment manner, it is beneficial to synchronously form the antenna 222 when processing the circuit board of the battery cell collecting board 22. Among them, the connection region 226 can be perpendicular to both the first extension region 224 and the second extension region 225, or the connection region 226 can be inclined with respect to the side-by-side direction of the sub-segment antennas 223.

[0037] Further, in the extending direction of the sub-segment antennas 223, the first extension region 224 and the second extension region 225 are alternately arranged. For example, in Figure 5 the up-down direction, the first extension region 224 and the second extension region 225 are alternately arranged, so as to realize the serpentine routing mode of the sub-segment antennas 223. In some embodiments, the first extension regions 224 between adjacent two sub-segment antennas 223 are correspondingly arranged, and the second extension regions 225 between them are correspondingly arranged. And, the interval L1 between the first extension regions 224 of adjacent two sub-segment antennas 223 is less than the interval L2 between the second extension regions 225 of adjacent two sub-segment antennas 223. For example, the interval L1 between the first extension regions 224 of adjacent two sub-segment antennas 223 can be equal to 0.9 mm, 0.8 mm or 1 mm, and the interval L2 between the second extension regions 225 of adjacent two sub-segment antennas 223 can be equal to 2.5 mm, 2.3 mm or 2.6 mm. The heights of multiple sub-segment antennas 223 are equal. For example, Figure 5 as shown, in the up-down direction, the heights between the sub-segment antennas 223 are equal. For example, the heights of the sub-segment antennas 223 are all equal to 14 mm, or 16 mm, or 18 mm.

[0038] It can be understood that the above are only some illustrative embodiments of the battery management system of the present disclosure. Without departing from the creative essence of the present disclosure, some structures of the battery management system 100 of the present disclosure can be equivalently or similarly transformed, and they will all be covered within the protection scope defined by the claims appended to the present disclosure.

[0039] The present disclosure also provides an electric vehicle. The electric vehicle includes the battery management system described above.

[0040] The electric vehicle of the present disclosure can have beneficial technical effects similar to those of the battery management system described above. Therefore, it will not be elaborated here.

[0041] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the disclosure herein. The present 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 known common knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0042] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A battery management system, characterized in that, Comprising: Near-field coupling lines; A battery assembly, including a plurality of battery cells and a plurality of battery cell acquisition boards. The plurality of battery cells are connected in series, and a single battery cell acquisition board is integrated on each battery cell. Each battery cell acquisition board includes an acquisition chip and an antenna that couples and communicates with the near-field coupling line. The antenna is disposed on the surface of the battery cell acquisition board and electrically connected to the acquisition chip, and at least a part of the antenna is arranged in a bent structure.

2. The battery management system according to claim 1, wherein The length direction of the antenna is parallel to the length direction of the near-field coupling line, and the bent structure extends along the length direction of the antenna.

3. The battery management system according to claim 1, wherein The antenna includes a plurality of sub-segment antennas arranged side by side, and the adjacent sub-segment antennas are connected end to end, and at least one sub-segment antenna is a bent trace.

4. The battery management system according to claim 3, wherein, At least one sub-segment antenna includes a first extension region, a second extension region and a connection region. The first extension region and the second extension region are arranged in parallel and are spaced apart in the side-by-side direction of the sub-segment antenna. The connection region connects the first extension region and the second extension region.

5. The battery management system according to claim 4, wherein, The connection region is inclined with respect to the side-by-side direction.

6. The battery management system according to claim 5, characterized in that, In the extension direction of the sub-segment antenna, the first extension region and the second extension region are alternately arranged.

7. The battery management system according to claim 3, characterized in that The adjacent sub-segment antennas are connected in an arc shape.

8. The battery management system according to claim 3, wherein The adjacent sub-segment antennas are symmetrically arranged.

9. The battery management system according to claim 1, characterized in that The plurality of battery cells are arranged in multiple rows, and each row of battery cells is arranged side by side in the thickness direction of the battery cell. The battery cell acquisition board is integrated on the side surface of each battery cell parallel to the thickness direction of the battery cell, and the antenna is disposed on the surface of the battery cell acquisition board facing away from the battery cell.

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

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