High-voltage distribution box, power battery and vehicle

Abstract

The utility model relates to a high-voltage distribution box, a power battery and a vehicle, and the high-voltage distribution box comprises a housing which is provided with a connecting bar; the electric device is electrically connected with the shell and / or the connecting bar through a bolt; the sensor assembly comprises at least one elastic wave sensor, the elastic wave sensor is used for collecting elastic waves generated in a preset area on the shell, the bolt is arranged in the preset area, and the elastic wave sensor is used for being electrically connected with a controller of a battery management system. The elastic wave sensor in the high-voltage distribution box can continuously monitor whether the bolt on the shell is loosened or not.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric vehicles, in particular, to a high-voltage distribution box, a power battery and a vehicle. BACKGROUND

[0002] In the related art, the electrical devices (such as relays, fuses, shunts, etc.) in the high-voltage distribution box are usually bolted to the shell, and the electrical devices are also connected to the connection row by bolts. At present, when the bolt is loose, the corresponding connection point of the bolt is prone to failure. Therefore, it is necessary to monitor whether the bolt is loose in real time. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a high-voltage distribution box, a power battery and a vehicle, and the elastic wave sensor in the high-voltage distribution box can continuously monitor whether the bolt on the shell is loose.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a high-voltage distribution box, which comprises a shell, a plurality of electrical devices and a sensor assembly. The shell is provided with a connection row. The electrical devices are electrically connected to the shell and / or the connection row by bolts. The sensor assembly comprises an elastic wave sensor. The elastic wave sensor is used to collect elastic waves generated in a preset area on the shell. The preset area is provided with the bolts. The elastic wave sensor is electrically connected to a controller of a battery management system.

[0005] Optionally, the shell is provided with a plurality of preset areas, and each of the preset areas is provided with at least one elastic wave sensor.

[0006] Optionally, at least one elastic wave sensor is located in an area surrounded by a plurality of bolts in the corresponding preset area.

[0007] Optionally, any of the elastic wave sensors is arranged apart from the connection row.

[0008] Optionally, any of the elastic wave sensors is bonded to the shell.

[0009] Optionally, the sensor assembly further comprises a flexible circuit board. A plurality of elastic wave sensors are electrically connected to the circuit board. The flexible circuit board is provided with a connector. The connector is used to electrically connect to the controller.

[0010] Optionally, the number of electrical devices is a plurality. A plurality of electrical devices are arranged in a preset direction in sequence. The flexible circuit board extends along the preset direction. A plurality of elastic wave sensors are arranged apart along the preset direction.

[0011] Optionally, the shell and the connection row are integrally formed.

[0012] According to a second aspect of the present disclosure, a power battery is provided, comprising the high-voltage distribution box as described above.

[0013] According to a third aspect of the present disclosure, a vehicle is provided, comprising the power battery as described above.

[0014] Through the above technical solution, during the use of the high-voltage distribution box installed on the vehicle, when the vehicle is running, the vibration generated by the vehicle will be transmitted to the high-voltage distribution box, causing the whole high-voltage distribution box to generate elastic waves due to vibration. Similarly, the bolts in the high-voltage distribution box will also generate elastic waves. The elastic wave sensor of the present disclosure can collect the elastic waves generated by the components in the preset area of the shell. When the bolts are in a fastened state, the elastic wave detected by the elastic wave sensor is the elastic wave in the normal state. When the bolts are in a loose state, the elastic wave detected by the elastic wave sensor is the elastic wave in the abnormal state. At this time, the controller can determine whether the bolts are loose according to the waveform collected by the elastic wave sensor. Therefore, the elastic wave sensor in the high-voltage distribution box of the present disclosure can continuously monitor whether the bolts on the shell are loose, so that the controller can identify the failure risk in advance according to the waveform of the elastic sensor and report it to the vehicle control system to make a response, ensuring the safety of the high-voltage distribution box during use.

[0015] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0017] Figure 1 is a structural schematic diagram of a high-voltage distribution box provided according to an embodiment of the present disclosure;

[0018] Figure 2 is an exploded view of a high-voltage distribution box provided according to an embodiment of the present disclosure;

[0019] Figure 3 is a top view of a high-voltage distribution box provided according to an embodiment of the present disclosure;

[0020] Figure 4 is a schematic diagram of a sensor assembly installation of a high-voltage distribution box provided according to an embodiment of the present disclosure;

[0021] Figure 5 is a structural schematic diagram of a sensor assembly of a high-voltage distribution box provided according to an embodiment of the present disclosure.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1 - housing, 11 - connecting row, 2 - electrical device, 3 - sensor assembly, 31 - elastic wave sensor, 32 - flexible circuit board, 33 - connector, 4 - preset area, 10 - bolt. DETAILED DESCRIPTION

[0024] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0025] In the present disclosure, the orientation words "inner, outer" used without the opposite description refer to "inner, outer" relative to the outline of the corresponding component itself. In addition, the purpose of using the words "first", "second" and the like is to distinguish different components, and does not have sequentiality and importance. In addition, in the following description, the same mark in different drawings represents the same element. Those skilled in the art should understand that the above definitions are only used to explain and illustrate the present disclosure, and should not be understood as a limitation of the present disclosure.

[0026] According to the specific embodiments of the present disclosure, referring to Figures 1 to 5 As shown in FIG. 1, a high-voltage distribution box is provided, which comprises a housing 1, a connecting row 11 arranged on the housing 1, an electrical device 2 fastened to the housing 1 by a bolt 10, wherein the electrical device 2 can be a relay, a fuse, a shunt, etc., and / or the electrical device 2 is electrically connected to the connecting row 11 by the bolt 10, and a sensor assembly 3 comprising at least one elastic wave sensor 31 for collecting elastic waves generated in a preset area 4 on the housing 1, wherein the bolt 10 is arranged in the preset area 4, and the elastic wave sensor 31 is electrically connected to a controller of a battery management system, and the controller is used to determine whether the bolt 10 in the preset area 4 is loose according to the elastic wave sensor 31.

[0027] By the above technical scheme, during use of the high-voltage distribution box installed on the vehicle, when the vehicle is running, the vibration generated by the vehicle is transmitted to the high-voltage distribution box, causing the high-voltage distribution box as a whole to generate elastic waves due to vibration. Similarly, the bolt 10 in the high-voltage distribution box also generates elastic waves. The elastic wave sensor 31 of the present disclosure can collect the elastic waves generated by the components in the preset area 4 of the shell 1. When the bolt 10 is in a fastened state, the elastic wave detected by the elastic wave sensor 31 is an elastic wave in a normal state. When the bolt 10 is in a loosened state, the elastic wave detected by the elastic wave sensor 31 is an elastic wave in an abnormal state. At this time, the controller can determine whether the bolt 10 is loosened according to the waveform collected by the elastic wave sensor 31. Thus, the elastic wave sensor 31 in the high-voltage distribution box of the present disclosure can continuously monitor whether the bolt 10 on the shell 1 is loosened, so that the controller can identify the failure risk in advance according to the waveform of the elastic sensor and report the vehicle control system to make a response, thereby ensuring the safety of the high-voltage distribution box during use.

[0028] Here, when the bolt 10 is in a fastened state, the waveform of the elastic wave collected by the elastic wave sensor 31 is a normal waveform. When the bolt 10 is in a loosened state, the waveform of the elastic wave collected by the elastic wave sensor 31 is an abnormal waveform. The controller can compare the real-time waveform collected by the elastic wave sensor 31 with the normal waveform to determine whether the real-time waveform is an abnormal waveform.

[0029] It should be noted that the principle of detecting elastic waves by the elastic wave sensor 31 is well known to those skilled in the art, and will not be described here.

[0030] The high-voltage distribution box belongs to a high-voltage distribution module of a power battery. When the power battery is charging or discharging, the contact resistance of the connection point between the connection row 11 and the electrical device 2 generates a large amount of heat. When the connection point between the connection row 11 and the electrical device 2 is not in good contact, the circuit will have a high-voltage safety risk caused by overheating. When the bolt 10 at the fastening connection between the electrical device 2 and the shell 1 is not in good connection, the shell 1 will have a safety risk caused by cracking. Thus, the overall stiffness of the high-voltage distribution module will change, and the vibration feedback signal will also change, so that the bolt 10 at the connection point of the electrical connection and the connection point of the fastening connection can output elastic waves with different signal waveforms when the bolt 10 is not in good connection. In this way, the controller can locate and determine the fault point according to the abnormal points of the waveform signal, and determine whether the electrical device 2 and the connection row 11 are not in good contact or the electrical device 2 and the shell 1 are not in good contact according to the abnormal type of the waveform signal, so that the controller can determine the fault type.

[0031] In addition, the connecting strip 11 can be configured as a connecting copper strip to ensure the electrical conductivity, corrosion resistance and the like of the connecting strip 11, and is easy to process and install, or the connecting strip 11 can also be configured of other materials such as aluminum, tinned copper or copper alloy, and the present disclosure does not make specific limitations thereon.

[0032] According to the embodiments provided by the present disclosure, referring to Figures 2 to 5 As shown in the figure, the shell 1 can be provided with a plurality of preset areas 4, and at least one elastic wave sensor 31 is arranged in each preset area 4, that is, the sensor assembly 3 can include a plurality of elastic wave sensors 31, and each elastic wave sensor 31 is used to collect the elastic wave generated in the corresponding preset area 4. In this way, the plurality of elastic wave sensors 31 can monitor the plurality of preset areas 4 in the shell 1 in real time, so as to ensure the coverage of the elastic wave sensors on the connection points in each part of the shell 1, thereby improving the comprehensiveness and reliability of the monitoring of the connection points in the shell 1.

[0033] According to the embodiments provided by the present disclosure, referring to Figure 3 As shown in the figure, the at least one elastic wave sensor 31 can be located in the area surrounded by the plurality of bolts 10 in the corresponding preset area 4. In this way, the monitoring distance between the elastic wave sensor 31 and each bolt 10 in the preset area 4 is controlled, so as to ensure that the elastic wave sensor 31 has good accuracy in collecting the elastic wave signals at the connection points of each bolt 10 in its preset area 4, thereby improving the accuracy of the controller fault judgment, and avoiding that when the elastic wave sensor 31 is located outside the area surrounded by the plurality of bolts 10, the elastic wave sensor 31 cannot accurately collect the elastic wave of the bolt 10 far away from it.

[0034] According to the embodiments provided by the present disclosure, referring to Figure 3 and Figure 4 As shown in the figure, the at least one elastic wave sensor 31 can be arranged close to the bolt 10 on the connecting strip 11. In this way, the elastic wave sensor 31 can be arranged close to the bolt 10 between the connecting strip 11 and the electrical device 2, so as to focus on monitoring the connection points of the bolt 10 at the electrical connection, prevent the conditions such as arc, short circuit and overheating caused by poor contact or looseness, thereby reducing the risk of fire, and ensuring the electrical connection safety of the electrical device 2.

[0035] When three elastic wave sensors 31 are installed in the shell 1 to monitor the corresponding three preset areas 4, the elastic wave sensors 31 at both ends of the shell 1 can be arranged in the preset areas 4, and the elastic wave sensor 31 in the middle is arranged close to the connecting row 11, so that the multiple connection points in the shell 1 can be effectively monitored, and the key point at the connecting row 11 can also be monitored. Alternatively, more than three elastic wave sensors 31 can also be arranged according to the actual needs, and the positions of each elastic wave sensor 31 can be arranged according to the actual needs, and the present disclosure does not make specific limitations.

[0036] According to the embodiments provided by the present disclosure, as shown in Figure 4 , any elastic wave sensor 31 can be arranged apart from the connecting row 11. In this way, by arranging the elastic wave sensor 31 apart from the connecting row 11, the electrical interference caused by the high-voltage electric field at the connecting row 11 is reduced, the accuracy of signal acquisition of the elastic wave sensor 31 is improved, and the normal work of the elastic wave sensor 31 is ensured. Of course, in other embodiments, the elastic wave sensor 31 can also be adhered to the connecting row 11 to achieve compact design, and the present disclosure does not make too many limitations.

[0037] According to the embodiments provided by the present disclosure, as shown in Figures 1 to 4 , any elastic wave sensor 31 can be adhered to the shell 1. In this way, the elastic wave sensor 31 is fixed on the shell 1, and the movement of the elastic wave sensor 31 in the shell 1 is avoided, which affects the accuracy of elastic wave signal acquisition. At the same time, the adhesive installation is convenient and simple to operate, which improves the assembly efficiency of the high-voltage distribution box. In other embodiments, the elastic wave sensor 31 can also be fixed on the shell 1 by other connection methods, such as buckle connection or bolt 10 connection, and the present disclosure does not make specific limitations.

[0038] According to the embodiments provided by the present disclosure, as shown in Figures 1 to 5 , the sensor assembly 3 can also include a flexible circuit board 32, and a plurality of elastic wave sensors 31 are electrically connected to the flexible circuit board 32. The flexible circuit board 32 is provided with a connector 33, and the connector 33 is used for electrical connection with the controller. In this way, the signals of the plurality of elastic wave sensors 31 can be transmitted through the flexible circuit board 32, and the signals can be transmitted to the controller through the connector 33, which simplifies the connection structure in the shell 1. At the same time, in order to realize the modular design of the sensor assembly 3, the installation and replacement efficiency is improved. In addition, by arranging the flexible circuit board 32, when it is necessary to arrange the flexible circuit board 32 apart from the connecting row 11 to prevent the electrical interference caused by the high-voltage electric field at the connecting row 11, the flexible circuit board 32 can be bent or folded to adapt to the space limitation in the shell 1, thereby improving the adaptability of the sensor assembly 3.

[0039] According to the embodiments provided by the present disclosure, referring to Figures 1 to 4 As shown in the figure, the number of the electric devices 2 can be multiple, the multiple electric devices 2 are arranged in sequence along the preset direction, the flexible circuit board 32 extends along the preset direction, and the multiple elastic wave sensors 31 are arranged at intervals along the preset direction. In this way, the wiring and management of the flexible circuit board 32 and the multiple elastic wave sensors 31 can be simplified, so that the multiple elastic wave sensors 31 can be arranged close to the electric devices 2, the accuracy and sensitivity of signal acquisition are improved, and the modular design of the high-voltage distribution box is realized.

[0040] According to the embodiments provided by the present disclosure, referring to Figure 2 As shown in the figure, the shell 1 and the connecting row 11 can be integrally formed. The shell 1 and the connecting row 11 have better connection strength, so that deformation or damage does not occur during transportation or installation, and the connection between the connecting row 11 and the shell 1 can be omitted, so that the problems of loose connection or poor contact are avoided. Therefore, the external impact can be better resisted, the reliability of the system is improved, the installation process of the high-voltage distribution box is simplified, in addition, the number of parts of the high-voltage distribution box is reduced, and the assembly of the high-voltage distribution box is simplified.

[0041] According to the second aspect of the present disclosure, a power battery is provided, which comprises the high-voltage distribution box as described above. The power battery has all the beneficial effects of the high-voltage distribution box described above, and the present disclosure will not be repeated here.

[0042] According to the third aspect of the present disclosure, a vehicle is provided, which comprises the power battery as described above. The vehicle has all the beneficial effects of the power battery described above, and the present disclosure will not be repeated here.

[0043] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0044] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not describe various possible combinations again.

[0045] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, they should also be considered as disclosed by the present disclosure.

Claims

1. A high voltage distribution box, characterized in that, The high-voltage distribution box comprises: a shell provided with a connecting row; an electrical device connected to the shell and / or the connecting row by a bolt; and a sensor assembly comprising at least one elastic wave sensor for collecting elastic waves generated in a preset area on the shell, the preset area being provided with the bolt, the elastic wave sensor being electrically connected to a controller of a battery management system.

2. The high-voltage distribution box of claim 1, wherein, The shell is provided with a plurality of preset areas, each of which is provided with at least one elastic wave sensor.

3. The high-voltage distribution box according to claim 1 or 2, characterized in that At least one elastic wave sensor is located in an area surrounded by a plurality of bolts in the corresponding preset area.

4. The high-voltage distribution box according to claim 1 or 2, characterized in that Any elastic wave sensor is spaced apart from the connecting row.

5. The high-voltage distribution box according to claim 1 or 2, characterized in that Any elastic wave sensor is bonded to the shell.

6. The high voltage distribution box of claim 2, wherein, The sensor assembly further comprises a flexible circuit board, a plurality of elastic wave sensors are electrically connected to the circuit board, the flexible circuit board is provided with a connector, and the connector is electrically connected to the controller.

7. The high-voltage distribution box of claim 6, wherein, The number of electrical devices is a plurality, a plurality of electrical devices are arranged in a preset direction, the flexible circuit board extends along the preset direction, and a plurality of elastic wave sensors are spaced apart along the preset direction.

8. The high-voltage distribution box of claim 1, wherein, The shell and the connecting row are integrally formed.

9. A power cell, characterized by The high-voltage distribution box comprises any one of claims 1-8.

10. A vehicle characterized by comprising: The power battery comprises claim 9.

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