Multifunctional automatic safety protection device for low-voltage storage battery

Abstract

The utility model discloses a multifunctional automatic safety protection device for a low-voltage storage battery, and belongs to the technical field of low-voltage storage battery protection. Comprising a box body, a plurality of bearing plates are detachably installed in the box body, a cooling fan is installed at the top of the box body, an under-voltage protector, a contactor and a timer which are electrically connected are fixed to the bearing plates respectively, the contactor is electrically connected with a manual power switch and a power source, the contactor is electrically connected with the timer, and the timer is electrically connected with the bearing plates. The timer is in a normally-open state, so that the technical effects of preventing the low-voltage storage battery from being electrified for a long time to cause potential safety hazards of the vehicle, ensuring normal operation of the vehicle and improving the use efficiency of the vehicle are achieved.

Description

Technical Field

[0001] This application relates to the technical field of low-voltage battery protection, and more specifically, to a multi-functional automatic safety protection device for low-voltage batteries. Background Art

[0002] With the popular application of pure electric buses, the low-voltage batteries are all maintenance-free batteries with uneven performance. During normal maintenance, only the exterior of the battery and the current battery data are simply cleaned and tested, and battery failures and breakdowns occur frequently; after the vehicle operation returns to the depot, some drivers sometimes forget to turn off the low-voltage mechanical switch, resulting in long-term discharge of the battery and affecting the service life of the low-voltage battery; when the vehicle is parked and the mechanical switch is not turned off, the power supply of the low-voltage battery may cause the high-voltage equipment to be energized, posing a serious safety hazard to the vehicle. Based on the above considerations, a multi-functional automatic safety protection device for low-voltage batteries has been developed, and currently, pure electric buses do not have this device and function.

[0003] In view of this, we propose a multi-functional automatic safety protection device for low-voltage batteries. Utility Model Content

[0004] 1. Technical Problems to be Solved

[0005] The purpose of this application is to provide a multi-functional automatic safety protection device for low-voltage batteries, which solves the technical problems in the above background art, realizes the avoidance of long-term power-on of low-voltage batteries, prevents the occurrence of vehicle safety hazards, ensures the normal operation of the vehicle, and improves the technical effect of vehicle use efficiency.

[0006] 2. Technical Solutions

[0007] The technical solution of this application provides a multi-functional automatic safety protection device for low-voltage batteries, including: a box body, in which multiple bearing plates are detachably installed; a heat dissipation fan is installed on the top of the box body; on multiple bearing plates, an under-voltage protector, a contactor, and a timer that are electrically connected are respectively fixed; the contactor is electrically connected to a manual power switch and a power supply, the contactor is electrically connected to the timer, and the timer is in a normally open state.

[0008] By adopting the above technical solution, three bearing plates are arranged in the box body. An undervoltage protector, a contactor and a timer are respectively fixed on the three bearing plates. And through the disassembly and assembly of the bearing plates and the box body, it is convenient to take out the undervoltage protector, the contactor and the timer from the box body for maintenance. And the box body is cooled by a cooling fan to increase the service life of the equipment. The output end of the vehicle manual power switch is connected to the contactor. When the manual power switch is turned on, the undervoltage protector starts, and the contactor starts to output to the distribution box to start the vehicle, and the vehicle goes through the power-on process. When the driver forgets to turn off the low-voltage mechanical switch and the power switch is not turned off for a long time, causing the low-voltage battery to discharge, the undervoltage protector detects that the low-voltage battery is between 23V and 25V, and the undervoltage protector starts and disconnects the contactor. One is to protect the low-voltage battery to prevent the low-voltage battery from being discharged for a long time and causing the low-voltage battery to run out of power, so that the vehicle cannot start the next morning; the other is that the low-voltage mechanical switch is not turned off, and a certain time is set through the timer to forcibly and automatically disconnect the low-voltage power supply to protect the safety of the vehicle after parking, especially the frequent spontaneous combustion of pure electric vehicles at present; the third is that when the driver goes to work the next day and finds that the vehicle cannot start, as long as the timer is rotated, the vehicle can be started immediately.

[0009] As an optional solution of the technical solution of this application document, the box body includes a cabinet body, a cabinet door hinged to the opening side of the cabinet body, and a plurality of L-shaped slots, and the bearing plates are adapted to the slots.

[0010] By adopting the above technical solution, the slots face the side of the cabinet body opening, and when the cabinet door is closed with the cabinet body through a buckle, the cabinet door can abut against the outer wall of the bearing plate at this time. At the same time, guide rails parallel to the insertion and extraction direction of the bearing plate are fixed on the inner wall of the slots, and sliding grooves adapted to the guide rails are opened at the bottom of the bearing plate, so that after the bearing plate is installed in the slots, the bearing plate is prevented from sliding perpendicular to the insertion and extraction direction.

[0011] As an optional solution of the technical solution of this application document, a plurality of air inlet holes are opened at the bottom of the cabinet body, a wire passing hole is opened on one side of the cabinet body, and a plurality of legs are fixedly installed at the bottom of the cabinet body.

[0012] By adopting the above technical solution, through the support of the legs, it is convenient for the air flow at the bottom to enter the cabinet body through the air inlet holes, and it is convenient for the wires to pass through through the wire passing hole.

[0013] As an optional solution of the technical solution of this application document, the plurality of bearing plates are arranged in a staggered and stacked manner up and down.

[0014] By adopting the above technical solution, the three bearing plates are distributed in an arch shape. When the air flow at the bottom enters the cabinet body, the air flow flows in an arch shape, so as to ensure that the undervoltage protector, the contactor and the timer can all be in contact with the air flow, improving the heat exchange effect.

[0015] As an alternative solution to the technical solution of this application document, the contactor and the under-voltage protector are grounded.

[0016] By adopting the above technical solution, it is ensured that when the equipment leaks electricity or fails, the current can be quickly introduced into the ground, reducing the risk of electric shock to the human body.

[0017] 3. Beneficial effects

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. In this application, through the under-voltage protector, contactor and timer, first, it protects the low-voltage battery, preventing the low-voltage battery from discharging for a long time and causing the low-voltage battery to run out of power, so that the vehicle cannot start the next morning; second, if the low-voltage mechanical switch is not closed, the low-voltage power supply is forcibly and automatically disconnected after a certain time set by the timer to protect the safety of the vehicle after parking, especially considering the frequent spontaneous combustion of current pure electric vehicles; third, if the driver finds that the vehicle cannot start when going to work the next day, as long as the timer is rotated, the vehicle can be started immediately.

[0020] 2. In this application, three bearing plates are arranged in the box body. The under-voltage protector, contactor and timer are respectively fixed on the three bearing plates. And through the disassembly and assembly of the bearing plates and the box body, it is convenient to take out the under-voltage protector, contactor and timer from the box body for maintenance. And the inside of the box body is cooled by a cooling fan, increasing the service life of the equipment.

[0021] 3. In this application, the three bearing plates are distributed in an arch shape. When the air flow at the bottom enters the cabinet, the air flow flows in an arch shape, ensuring that the under-voltage protector, contactor and timer can all come into contact with the air flow, improving the heat exchange effect. Brief description of the drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of a multi-functional automatic safety protection device for a low-voltage battery disclosed in a preferred embodiment of this application;

[0023] Figure 2 It is a schematic diagram of the overall front view structure of a multi-functional automatic safety protection device for a low-voltage battery disclosed in a preferred embodiment of this application;

[0024] Figure 3 It is a schematic diagram of the box body structure of a multi-functional automatic safety protection device for a low-voltage battery disclosed in a preferred embodiment of this application;

[0025] Figure 4 It is a working principle diagram of a multi-functional automatic safety protection device for a low-voltage battery disclosed in a preferred embodiment of this application;

[0026] Description of reference numerals in the figure: 1. Under-voltage protector; 2. Contactor; 3. Timer; 4. Box body; 41. Cabinet body; 411. Threading hole; 412. Air inlet hole; 413. Leg; 42. Cabinet door; 43. Buckle; 44. Card slot; 441. Guide rail; 5. Bearing plate; 6. Cooling fan. Detailed implementation mode

[0027] The present application will be further described in detail below with reference to the accompanying drawings of the specification.

[0028] The multi-functional automatic safety protection device for a low-voltage battery includes: a box body 4, in which a plurality of bearing plates 5 are detachably installed, a cooling fan 6 is installed on the top of the box body 4, and an under-voltage protector 1, a contactor 2 and a timer 3 which are electrically connected are respectively fixed on the plurality of bearing plates 5. The contactor 2 is electrically connected to a manual power switch and a power supply, the contactor 2 is electrically connected to the timer 3, and the timer 3 is in a normally open state.

[0029] Refer to Figures 1-4 , three bearing plates 5 are arranged in the box body 4, the under-voltage protector 1, the contactor 2 and the timer 3 are respectively fixed on the three bearing plates 5, and through the disassembly and assembly of the bearing plate 5 and the box body 4, it is convenient to take out the under-voltage protector 1, the contactor 2 and the timer 3 from the box body 4 for maintenance, and the inside of the box body 4 is cooled by the cooling fan 6 to increase the service life of the equipment. The output end of the vehicle manual power switch is connected to the contactor 2. When the manual power switch is turned on, the under-voltage protector 1 is started, and the contactor 2 is started to output to the distribution box to start the vehicle, and the vehicle goes through the power-on process. When the driver forgets to turn off the low-voltage mechanical switch and the power switch is not turned off for a long time, resulting in the discharge of the low-voltage battery, the under-voltage protector 1 detects that the low-voltage battery is between 23V and 25V (can be set), and the under-voltage protector 1 is started and the contactor 2 is disconnected. One is to protect the low-voltage battery and prevent the low-voltage battery from being discharged for a long time and causing the low-voltage battery to be depleted, so that the vehicle cannot be started the next morning; the other is that the low-voltage mechanical switch is not turned off, and the low-voltage power supply is forcibly and automatically disconnected through the timer 3 for a certain time to protect the safety of the vehicle after parking, especially the frequent occurrence of spontaneous combustion of current pure electric vehicles; the third is that when the driver goes to work the next day and finds that the vehicle cannot be started, as long as the timer 3 is rotated, the vehicle can be started immediately.

[0030] The box body 4 includes a cabinet body 41, a cabinet door 42 hinged to the opening side of the cabinet body 41 and a plurality of L-shaped card slots 44, and the bearing plate 5 is adapted to the card slots 44.

[0031] Refer to Figure 1 and Figure 3, the card slot 44 faces the side of the cabinet body 41 that is open, and when the cabinet door 42 and the cabinet body 41 are closed by the buckle 43, the cabinet door 42 can abut against the outer wall of the bearing plate 5 at this time. At the same time, a guide rail 441 parallel to the insertion and extraction direction of the bearing plate 5 is fixed on the inner wall of the card slot 44. A chute adapted to the guide rail 441 is opened at the bottom of the bearing plate 5, so as to prevent the bearing plate 5 from sliding perpendicular to the insertion and extraction direction after the bearing plate 5 is installed in the card slot 44.

[0032] A plurality of air inlet holes 412 are opened at the bottom of the cabinet body 41, a wire passing hole 411 is opened on one side of the cabinet body 41, and a plurality of legs 413 are fixedly installed at the bottom of the cabinet body 41.

[0033] Refer to Figure 3 , through the support of the legs 413, so that the airflow at the bottom can enter the cabinet body 41 through the air inlet holes 412, and through the wire passing hole 411, it is convenient for the wires to pass through.

[0034] Multiple bearing plates 5 are arranged in a staggered and stacked manner up and down.

[0035] Refer to Figure 2 , three bearing plates 5 are distributed in an arc shape, so that when the airflow at the bottom enters the cabinet body 41, the airflow flows in an arc shape, thereby ensuring that the under-voltage protector 1, the contactor 2 and the timer 3 can all be in contact with the airflow, improving the heat exchange effect.

[0036] The contactor 2 and the under-voltage protector 1 are grounded.

[0037] Ensure that in the event of equipment leakage or failure, the current can be quickly introduced into the ground to reduce the risk of electric shock to the human body.

[0038] Working principle: The output end of the vehicle manual power switch is connected to the contactor 2. When the manual power switch is turned on, the under-voltage protector 1 starts, and the contactor 2 starts to output to the distribution box to start the vehicle. The vehicle goes through the power-on process. When the driver forgets to turn off the low-voltage mechanical switch and the power switch is not turned off for a long time, resulting in the discharge of the low-voltage battery, the under-voltage protector 1 detects that the low-voltage battery is between 23V and 25V, the under-voltage protector 1 starts and disconnects the contactor 2. When maintenance is required, turn the cabinet door 42 outwards, and then pull the bearing plate 5 outwards to facilitate the maintenance of the equipment.

Claims

1. Multifunctional automatic safety protection device for low-voltage batteries, characterized by: include: A box (4), wherein a plurality of bearing plates (5) are detachably mounted in the box (4), a cooling fan (6) is mounted on the top of the box (4), and an undervoltage protector (1), a contactor (2) and a timer (3) which are electrically connected are fixed on the plurality of bearing plates (5), the contactor (2) is electrically connected to a manual power switch and a power source, the contactor (2) is electrically connected to the timer (3), and the timer (3) is in a normally open state.

2. The multifunctional automatic safety protection device for low-voltage batteries according to claim 1 is characterized in that: The box body (4) comprises a cabinet body (41), a cabinet door (42) hinged on an opening side of the cabinet body (41), and a plurality of L-shaped card slots (44), and the bearing plate (5) is adapted to the card slots (44).

3. The multifunctional automatic safety protection device for low-voltage batteries according to claim 2 is characterized in that: The bottom of the cabinet (41) is provided with a plurality of air inlet holes (412), one side of the cabinet (41) is provided with a threading hole (411), and the bottom of the cabinet (41) is fixedly provided with a plurality of supporting legs (413).

4. The multifunctional automatic safety protection device for low-voltage batteries according to claim 1 is characterized in that: The plurality of bearing plates (5) are arranged in an interlaced manner and stacked up and down.

5. The multifunctional automatic safety protection device for low-voltage batteries according to claim 1 is characterized in that: The contactor (2) and the undervoltage protector (1) are grounded.

Images