A wireless display system for power batteries

Abstract

This utility model relates to the field of novel power battery pack technology, specifically to a wireless display system for power batteries. It includes a power battery pack, a housing, and a display screen. The power battery pack contains a power distribution unit for collecting battery status data. The housing has a built-in wireless module that connects to the power distribution unit via a wiring harness to achieve wireless data transmission. The display screen communicates wirelessly with the wireless module and has a built-in independent power supply unit to ensure that key parameters can still be displayed even when power is off. This utility model solves the problems of easy breakage and signal instability in traditional wired connections in dynamic scenarios through wireless transmission technology. Simultaneously, the use of partition isolation and shielded cable design effectively reduces electromagnetic interference and improves data acquisition accuracy. It is suitable for scenarios requiring real-time battery status monitoring, such as new energy vehicles and construction machinery, and can significantly improve the safety and stability of power battery monitoring.

Description

Technical Field

[0001] This utility model relates to the field of new power battery pack technology, and more specifically, to a wireless display system for power batteries. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage equipment, and other fields, real-time status monitoring of power battery packs has become a core requirement for ensuring the safe operation of systems. In dynamic scenarios such as industrial vehicles and construction machinery, drivers or operators need to view key parameters such as battery voltage, temperature, and remaining charge in real time through display systems in order to adjust operating modes or provide early warnings of potential faults. However, in such scenarios, there is often frequent relative displacement between the main body of the equipment and the cab (e.g., moving with a lifting platform), which poses a severe challenge to the adaptability of traditional wired display systems.

[0003] Currently, power battery display systems generally rely on wiring to simultaneously achieve power supply and data transmission. However, their core drawback lies in the incompatibility of the physical connection method of the wiring with scenarios involving dynamic equipment movement. Specifically, when the cockpit or display terminal rises or falls with the operator, repeated bending and stretching of the wiring can cause internal conductor breakage or insulation damage, leading to power outages and signal transmission failures. Simultaneously, electromagnetic interference generated by the high-frequency charging and discharging of the power battery can couple to the data acquisition circuit through the shared wiring harness, resulting in a degraded signal-to-noise ratio and affecting the accuracy of status parameter monitoring. Although existing technologies attempt to alleviate these problems by reinforcing the wiring or adding redundant interfaces, they are essentially still limited by the dual structural defects of "wired connection + non-isolated layout." Utility Model Content

[0004] This utility model provides a wireless display system for power batteries. It separates the power battery pack's status data acquisition module from the display terminal, uses wireless communication technology to achieve cross-space data transmission, and integrates an independent power supply unit within the display screen, thus constructing a closed-loop monitoring system that eliminates the need for physical cable connections. This solves the problems mentioned in the background section.

[0005] The physical connection method of the cable is not compatible with the dynamic displacement scenario of the device.

[0006] To achieve the above objectives, the wireless display system includes a housing, in which a partition is disposed, dividing the housing into a circuit chamber and a battery chamber, wherein:

[0007] The surface of the partition is provided with an electromagnetic shielding coating;

[0008] The battery chamber is equipped with a power battery pack, the power battery pack contains a battery pack, and the power battery pack integrates a power distribution unit, which is electrically connected to the battery pack via a wiring harness.

[0009] A wireless module is installed inside the circuit cavity. An antenna extends vertically from the top of the wireless module to the outside of the housing. The wireless module is connected to the power distribution unit across the partition via a shielded cable, and the shielded cable is electrically connected to transmit data using the 485 communication protocol.

[0010] In the above technical solution, the core design concept of separating the circuit chamber and the battery chamber by a partition is to construct a dual isolation barrier against electromagnetic interference and thermal environment. If the partition is removed, the high-frequency pulse interference generated by the charging and discharging of the power battery pack in the battery chamber will directly invade the circuit chamber, causing a surge in the signal error rate of the wireless module. The electromagnetic shielding coating added to the surface of the partition compensates for the magnetic field leakage defects at the joints of the metal casing, preventing transient surge interference from the power battery from coupling to the wireless module through physical gaps. The wireless module uses shielded cables to connect to the power distribution unit across the partition and is forced to use the 485 communication protocol. This is actually a collaborative design of hardware shielding and protocol anti-interference to resist signal distortion under complex operating conditions. If unshielded cables are used instead, the battery pack voltage regulation signal will directly interfere with the input of the wireless module through the wiring harness, while the differential transmission characteristics of the 485 protocol can suppress data jumps caused by ground potential fluctuations. The vertical external antenna layout avoids the shielding effect of the metal casing on wireless signals. If the antenna is built into the circuit cavity, the attenuation of high-frequency signals by the metal casing will force the wireless module to increase its transmission power, which will aggravate the electromagnetic noise in the circuit cavity.

[0011] Based on this, a display screen is provided at one end of the housing, which communicates with the wireless module via wireless signal, and the display screen has a built-in power supply unit.

[0012] In another technical solution, the power supply unit of the display screen is a rechargeable battery, which is connected to an external power source through a charging port located on the side of the display screen.

[0013] This technical solution, with its display communicating wirelessly with a wireless module and featuring a built-in independent power supply unit, essentially aims to eliminate the dual dependence of the display on both battery power and wired transmission found in traditional solutions. If the display were still connected to the casing via cables, bending of the cables in dynamic scenarios could lead to power outages and signal loss (for example, during lifting operations on construction machinery, dragging the cables could cause charging contacts to detach). The built-in rechargeable battery, combined with a side charging port, achieves energy self-sufficiency while avoiding spatial conflicts between the charging interface and the operating surface (if the charging port were located on the back, the display would need to be disassembled for plugging and unplugging, significantly reducing maintenance efficiency). This hybrid design of "wireless communication + side power supply" avoids the structural fragility caused by physical connections and ensures continuous monitoring capabilities under extreme conditions through optimized human-machine interaction.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The wireless communication architecture between the wireless module and the display screen eliminates the need for traditional cable connections, solving the problems of cable breakage and signal interruption caused by repeated bending in dynamic scenarios. The combination of a partitioned chamber design and an electromagnetic shielding coating physically isolates the high-frequency interference from the power battery from the sensitive circuitry of the wireless module. Compared to solutions without isolation or with a single metal shield, the data acquisition error rate is effectively reduced. The display screen has an independent power supply system with a built-in rechargeable battery and a side-mounted charging port. This not only allows the display terminal to continue alarming even when the battery pack suddenly loses power (a traditional solution fails due to reliance on the main power supply), but also avoids the cumbersome operation of disassembling the display screen through a side-plug design. In addition, the vertical external antenna and the 485 protocol transmission of the shielded cable form a complementary anti-interference mechanism, which is especially suitable for new energy vehicles and construction machinery scenarios with frequent vibrations and drastic ground potential fluctuations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the overall structural division of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall assembly structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the power battery structure for signal transmission between the present invention and the wireless display system;

[0019] Figure 4 This is the circuit schematic diagram of this utility model.

[0020] The meanings of the labels in the diagram are as follows:

[0021] 1. Wireless module; 2. Switch; 3. Housing; 4. Display screen; 5. Back cover; 6. Battery pack; 7. Divider; 8. Charging port; 9. Power distribution unit; 10. Power battery pack; 600. Connection point; 900. Communication module; 1000. Internal chip. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To address the current issue of incompatibility between physical connection methods using wires and dynamic device displacement scenarios, this invention provides a wireless display system for power batteries. (See attached image.) Figure 3 , Figure 4 As shown, the main body of the system is a housing 3 made of aluminum alloy. The interior of the housing 3 is divided into a battery chamber and a circuit chamber by a stamped galvanized steel plate partition 7. The surface of the partition 7 is covered with a copper-nickel alloy electromagnetic shielding coating, and conductive adhesive is injected at the joints to form a continuous shielding layer, which can block the transmission of high-frequency electromagnetic interference from the battery chamber to the circuit chamber.

[0024] A power battery pack 10 is installed inside the battery chamber, consisting of multiple battery packs 6 stacked longitudinally. Adjacent battery packs 6 are physically separated by engineering plastic partitions 7. The side wall surface of the partition 7 near the battery pack 6 has an S-shaped groove, and the inner wall of the groove is fitted with a ferrite absorbing patch. The power distribution unit 9 is fixed to the side of the partition 7 near the battery pack 6 by bolts. Its built-in microcontroller is connected to the cell terminals of each battery pack 6 through tin-plated copper core wire harness to collect individual cell voltage, charging and discharging current and surface temperature parameters in real time.

[0025] The wireless module 1 is installed in the circuit chamber. Its top column antenna extends vertically to the outside of the top of the housing 3, avoiding the metal shielding area above the battery chamber. The wireless module 1 is connected to the power distribution unit 9 through the shielded twisted pair cable across the partition 7. The shielded cable is run through the S-shaped cable groove of the partition 7. The outer braided copper mesh shielding layer is grounded. Both ends are fixed by waterproof aviation plugs. Data transmission adopts the MODBUS-RTU protocol (based on the RS485 physical layer standard).

[0026] The display terminal includes a crystal display screen 4, which is detachably fixed to the front outer wall of the housing 3 by four sets of stainless steel clips, and a silicone anti-slip pad is attached to the contact surface. The display screen 4 has a built-in lithium polymer battery forming an independent power supply unit, and a Type-C charging port 8 is provided on the right side. When the power supply of the power battery pack 10 is interrupted, the power management chip seamlessly switches to the built-in battery power supply within 50ms and triggers the red alarm interface and historical data storage function. A physical switch 2 is set on the top of the housing 3 to control the on / off of the wireless module 1, and a detachable back cover 5 is fixed to the rear end with screws. The inner side of the back cover 5 is bonded with an insulating layer to form a double isolation protection with the surface of the circuit board of the wireless module 1.

[0027] like Figure 4 As shown, the wireless display system and the power battery pack 10 are compatible with a wired communication architecture. The wireless module 1 is equipped with a power supply module 400, which converts the 24V input of the power battery pack 10 into multiple 12V / 5V outputs, supplying power to the 485 communication module 100 and the radio frequency circuit respectively. Switch 2 is connected to the input of the power supply module 400 via a wire, and the output of the power supply module 400 provides 12V DC power to the 485 communication module 100. The power battery pack 10 is equipped with a 485 communication module 900 and a power supply module 100. The 485 communication modules 100 and 900 at both ends exchange data via shielded twisted-pair cable or wireless signal. The positive and negative terminals of the internal battery cells 1000 of the power battery pack 10 are connected to the power supply module 100 through connection point 600, forming a complete power supply loop. This design allows the system to switch to wired mode when wireless communication is limited (such as in areas with strong electromagnetic interference), maintaining data transmission via the 485 bus protocol, thus improving adaptability to different operating conditions.

[0028] During system operation, the power distribution unit 9 sends a data packet to the wireless module 1 every 200ms. After verification, the packet is converted into an electromagnetic wave signal by the radio frequency chip. The receiving antenna built into the display screen 4 captures the signal, which is then analyzed by the main control chip to generate a dynamic visualization interface. The left side of the interface displays the real-time voltage waveform of the power battery pack 10, refreshed at 50 sampling points per second; the middle area presents the temperature change curve in the form of a line graph, supporting swipe touch to switch between different monitoring data; the right side displays the remaining power using a digital percentage combined with a circular progress bar, and users can activate the night mode or data storage function by double-tapping the screen.

[0029] When the device is in motion, the wireless connection between the display screen 4 and the housing 3 effectively avoids the conductor breakage problem caused by repeated bending of traditional cables. The cable tray design inside the partition 7 maintains a safe distance between the data harness and the battery pack 6, reducing electromagnetic interference generated by high-current charging and discharging. The insulation layer of the back cover 5 ensures the stable operation of the wireless module 1 under abnormal battery discharge conditions. The independent power supply system of the display screen 4 can still continuously output alarm information and record the last 30 minutes of operating data when a short circuit fault occurs in the power battery pack 10, providing key information for fault diagnosis.

[0030] This utility model solves the reliability problem of traditional cable connections in dynamic scenarios through the wireless communication design between the wireless module 1 and the display screen 4. The optimized layout of the power distribution unit 9 and the partition 7 ensures the accuracy of data acquisition. At the same time, the independent power supply system of the display screen 4 provides continuous monitoring capability in fault conditions. The overall structure is simple and efficient, achieving the design goals of "wireless, highly reliable, and easy to maintain".

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A wireless display system for a power battery, comprising a housing (3), wherein a partition (7) is disposed therein, characterized in that: The housing (3) is divided into a circuit chamber and a battery chamber by the partition (7), wherein: The surface of the partition (7) is provided with an electromagnetic shielding coating; The battery chamber is provided with a power battery pack (10), the power battery pack (10) is provided with a battery pack (6), the power battery pack (10) is integrated with a power distribution unit (9), and the power distribution unit (9) is electrically connected to the battery pack (6) through a wiring harness. A wireless module (1) is provided in the circuit cavity. An antenna extends vertically from the top of the wireless module (1) to the outside of the housing (3). The wireless module (1) is connected to the power distribution unit (9) across the partition (7) via a shielded cable. The shielded cable transmits data using the 485 communication protocol.

2. The wireless display system for power cells according to claim 1, characterized in that: The housing (3) has a display screen (4) at one end, which communicates with the wireless module (1) via wireless signal, and the display screen (4) has a built-in power supply unit.

3. The wireless display system for power cells of claim 2, wherein: The power supply unit of the display screen (4) is a rechargeable battery, which is connected to an external power source through a charging port (8) located on the side of the display screen (4).

4. The wireless display system for power cells of claim 1, wherein: The outer wall of the housing (3) is provided with a switch (2), which is electrically connected to the power input terminal of the wireless module (1) and is used to control the power supply of the wireless module (1).

5. The wireless display system for power cells of claim 3, wherein: The housing (3) has a detachable back cover (5) at one end opposite to the display screen (4). The back cover (5) is fixedly connected to the housing (3) by screws, and the inner side of the back cover (5) is provided with an insulating layer, which is attached to the circuit board surface of the wireless module (1).

6. The wireless display system for power cells of claim 5, wherein: The display screen (4) is detachably fixed to the outer wall of the housing (3) by a buckle, and the contact surface between the display screen (4) and the housing (3) is provided with an anti-slip pad.

7. The wireless display system for power cells of claim 2, wherein: The wire harness connecting the wireless module (1) and the power distribution unit (9) is threaded through a wire groove inside the partition (7), and the wire groove extends along the thickness direction of the partition (7).

8. The wireless display system for power cells of claim 2, wherein: The display screen (4) includes the real-time voltage waveform, temperature change curve and remaining power percentage of the power battery pack (10), and the interface supports touch operation to switch display modes.

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