Lithium battery state monitoring device

Abstract

The utility model discloses a lithium battery state monitoring device, which relates to the field of lithium batteries and comprises a battery box, a box cover is mounted at the top of the battery box through mounting bolts, a pressure relief component is arranged in the box cover and comprises a cavity and an air guide channel, and the cavity and the air guide channel are arranged in the box cover. Through the arrangement of the pressure relief assembly, when the temperature in the battery box is too high and the air pressure is increased, air enters an air guide channel through an air guide hole and enters a cavity, at the moment, a piston is pushed by the air pressure to move upwards, a movable rod is driven to move upwards, then a movable plate is driven to move upwards, and the movable plate drives a movable block to move upwards; and meanwhile, when the movable plate moves upwards, the multiple sealing plugs can be driven to move upwards at the same time, the sealing plugs do not block the pressure relief holes any more, at the moment, heat can be discharged through the pressure relief holes, and therefore the purposes of pressure relief and heat dissipation are achieved.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to a lithium battery status monitoring device. Background Art

[0002] At present, with the popularization of applications such as electric vehicles and drones, lithium batteries, as a high-efficiency, lightweight, and high-energy-density battery, are gradually becoming mainstream; and the lithium batteries in electric vehicles are composed of multiple battery cells. The status of lithium batteries needs to be monitored during use to ensure the normal driving of electric vehicles.

[0003] According to a Chinese patent with announcement number CN219829978U, a lithium battery status monitoring device is disclosed. When a battery pack bulges, the two sides of the battery pack expand, the sliding plate and the U-shaped plate are pushed and move closer to each other, and the pressure sensor sends a signal to the controller, which can send an alarm signal to monitor the bulging condition of the battery pack so that the bulging battery pack can be replaced in time.

[0004] Regarding the above-disclosed patent content, since lithium batteries generate heat, the heat will enter the side panels through the heat dissipation holes and is difficult to dissipate through the box cover, causing the heat to accumulate in the side panels. Over time, it will cause the temperature inside the battery box to rise and the air pressure inside the battery box to increase. When the pressure sensor works in a high temperature environment for a long time, it may cause damage to electronic components, making it difficult for the pressure sensor to monitor whether the battery pack is expanded, thereby reducing the heat dissipation and monitoring efficiency of the battery pack. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a lithium battery status monitoring device to solve the technical problem that the heat generated by the battery pack is difficult to dissipate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery status monitoring device, comprising a battery box, a box cover is installed on the top of the battery box by installing bolts, a pressure relief assembly is provided inside the box cover, and the pressure relief assembly includes a cavity and an air guide channel opened inside the box cover, a plurality of pressure relief holes opened above the inside of the box cover, a plurality of grooves opened on the top of the box cover and a plurality of air guide holes opened on the bottom of the box cover, a gasket is provided inside the cavity, a piston is provided on the top of the gasket, a movable rod extending to the top of the box cover is provided on the top of the piston, a movable plate is fixed to the top of the movable rod, and a plurality of sealing plugs are installed on the bottom of the movable plate.

[0007] By adopting the above technical solution, when the movable plate moves up, it will drive multiple sealing plugs to move up at the same time, so that the sealing plugs no longer block the pressure relief holes, and the heat will be discharged through the pressure relief holes.

[0008] Furthermore, a return spring is fixed on the upper part of the interior of the groove, and a movable block is connected to the bottom end of the return spring.

[0009] By adopting the above technical solution, after the movable plate moves up, it will drive the connecting rod to move up, and then drive the movable block to move up, and make the movable block squeeze the reset spring, so that the reset spring is compressed.

[0010] Furthermore, a connecting rod penetrating to the top of the box cover is provided on the top of the movable block, and the top end of the connecting rod is connected to the bottom of the movable plate.

[0011] By adopting the above technical solution, when the temperature inside the battery box is too high and the air pressure increases, the piston is pushed up by the air pressure, and drives the movable rod to move up, and then drives the movable plate to move up.

[0012] Furthermore, a plurality of partitions are installed at the lower part of the battery box, a positioning hole is opened at the top of the partition, and a battery pack is arranged between the plurality of partitions.

[0013] By adopting the above technical solution, the partition can separate multiple battery packs, thereby facilitating the monitoring of the status of the battery packs.

[0014] Furthermore, a plurality of side panels are installed at the bottom of the box cover, and pressure sensors and a plurality of telescopic rods are respectively installed inside the side panels.

[0015] By adopting the above technical solution, when the skateboard moves toward the side plate, it will squeeze the telescopic rod, causing the telescopic rod to be compressed.

[0016] Furthermore, one end of the telescopic rod is connected to a slide plate, and temperature sensors are installed on one side of the slide plate and one side of the side plate.

[0017] By adopting the above technical solution, the temperature sensor can monitor the temperature, and if the temperature exceeds a predetermined value, it will transmit a signal to the controller.

[0018] Furthermore, the skateboard is provided with a plurality of heat dissipation openings, and the plurality of heat dissipation openings are evenly distributed on the skateboard.

[0019] By adopting the above technical solution, the setting of the heat dissipation port facilitates the heat flow and facilitates the heat dissipation of the battery pack.

[0020] Furthermore, the slide plate is slidably connected to the side plate, and the pressure sensor is located on one side of the slide plate.

[0021] By adopting the above technical solution, the skateboard can slide on the side panel, and after the pressure sensor detects the pressure applied by the skateboard, it will transmit a signal to the controller.

[0022] Furthermore, a positioning column extending into the positioning hole is installed at the bottom of the side plate, and the positioning column is adapted to the positioning hole.

[0023] By adopting the above technical solution, when installing the side panel, the positioning column at the bottom of the side panel can be inserted into the positioning hole on the partition plate to play a role in positioning the side panel.

[0024] Furthermore, a controller is installed on one side of the battery box, and the controller is electrically connected to the pressure sensor and the temperature sensor respectively.

[0025] By adopting the above technical solution, the pressure sensor and the temperature sensor can be started or shut down through the controller.

[0026] In summary, the utility model mainly has the following beneficial effects:

[0027] The utility model is provided with a pressure relief component. When the temperature inside the battery box is too high and the air pressure increases, the gas will enter the air guide channel through the air guide hole and then into the cavity. At this time, the piston is pushed up by the air pressure, and drives the movable rod to move up, and then drives the movable plate to move up. The movable plate drives the movable block to move up, so that the movable block squeezes the reset spring. At the same time, when the movable plate moves up, it drives multiple sealing plugs to move up at the same time, so that the sealing plugs no longer block the pressure relief hole. At this time, heat will be discharged through the pressure relief hole, so as to achieve the purpose of pressure relief and heat dissipation, prevent the pressure sensor from being damaged due to excessive air pressure in the battery box, and increase the service life of the monitoring device. After the pressure relief and heat dissipation are completed, the pressure sensor and the temperature sensor can still monitor the status of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall front section structure of the utility model;

[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the partition of the utility model;

[0031] Figure 4 This is a bottom-up three-dimensional structural diagram of the box cover of the utility model;

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the movable plate of the utility model when viewed from above;

[0033] Figure 6 For the utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0034] In the figure: 1. battery box; 2. controller; 3. box cover; 4. alarm; 5. partition; 6. positioning hole; 7. positioning column; 8. battery pack; 9. mounting bolts; 10. side panel; 11. slide plate; 12. temperature sensor; 13. heat dissipation vent; 14. telescopic rod; 15. pressure sensor; 16. pressure relief assembly; 1601. air guide channel; 1602. air guide hole; 1603. cavity; 1604. movable plate; 1605. connecting rod; 1606. movable rod; 1607. piston; 1608. gasket; 1609. pressure relief hole; 1610. sealing plug; 1611. groove; 1612. movable block; 1613. reset spring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0036] The following describes an embodiment of the utility model based on its overall structure.

[0037] Embodiment 1:

[0038] A lithium battery status monitoring device, such as Figure 1-Figure 6 As shown, it includes a battery box 1, a box cover 3 is installed on the top of the battery box 1 by installing bolts 9, a pressure relief assembly 16 is provided inside the box cover 3, and multiple side panels 10 are installed at the bottom of the box cover 3. Pressure sensors 15 and multiple telescopic rods 14 are respectively installed inside the side panels 10. When the slide plate 11 moves toward the side panel 10, it will squeeze the telescopic rod 14, so that the telescopic rod 14 is compressed. One end of the telescopic rod 14 is connected to the slide plate 11, and temperature sensors 12 are installed on one side of the slide plate 11 and one side of the side panel 10. The temperature sensor 12 can monitor the temperature. If the temperature exceeds a predetermined value, it will transmit a signal to the controller 2.

[0039] Specifically, the pressure relief assembly 16 includes a cavity 1603 and an air guide channel 1601 opened inside the box cover 3, a plurality of pressure relief holes 1609 opened above the inside of the box cover 3, a plurality of grooves 1611 opened at the top of the box cover 3 and a plurality of air guide holes 1602 opened at the bottom of the box cover 3. A gasket 1608 is provided inside the cavity 1603, and a piston 1607 is provided on the top of the gasket 1608. A movable rod 1606 extending to the top of the box cover 3 is provided on the top of the piston 1607, and a movable plate 1604 is fixed to the top of the movable rod 1606. A plurality of sealing plugs 1610 are installed at the bottom of the movable plate 1604. When the movable plate 1604 moves upward, it will drive the plurality of sealing plugs 1610 to move upward at the same time, so that the sealing plugs 1610 no longer block the pressure relief holes 1609. At this time, heat will be discharged through the pressure relief holes 1609.

[0040] Specifically, a return spring 1613 is fixed on the upper part of the inner part of the groove 1611, and the bottom end of the return spring 1613 is connected to a movable block 1612, and the top of the movable block 1612 is provided with a connecting rod 1605 that penetrates to the top of the box cover 3, and the top of the connecting rod 1605 is connected to the bottom of the movable plate 1604. When the temperature inside the battery box 1 is too high and the air pressure increases, the piston 1607 is pushed up by the air pressure, and drives the movable rod 1606 to move up, and then drives the movable plate 1604 to move up, and the movable plate 160 After moving upward, the connecting rod 1605 will be driven upward, and then the movable block 1612 will be driven upward, and the movable block 1612 will squeeze the reset spring 1613, so that the reset spring 1613 is compressed, which is convenient for driving the movable plate 1604 to reset. The bottom end of the air guide hole 1602 extends into the side plate 10, and the air guide channel 1601 is connected with the cavity 1603 and the air guide hole 1602 respectively, so that the heat can enter the air guide channel 1601 through the air guide hole 1602, and then enter the cavity 1603.

[0041] See also Figure 2 , Figure 3 and Figure 5 A plurality of heat dissipation openings 13 are provided on the skateboard 11, and the plurality of heat dissipation openings 13 are equidistantly distributed on the skateboard 11. The setting of the heat dissipation openings 13 facilitates the circulation of heat and facilitates the heat dissipation of the battery pack 8. The skateboard 11 is slidably connected to the side panel 10. The pressure sensor 15 is located on one side of the skateboard 11. A controller 2 is installed on one side of the battery box 1. The controller 2 is electrically connected to the pressure sensor 15 and the temperature sensor 12 respectively, so that the skateboard 11 can slide on the side panel 10. At the same time, after the pressure sensor 15 detects the pressure applied by the skateboard 11, it will transmit a signal to the controller 2. An alarm 4 is installed on one side of the top of the box cover 3. The controller 2 is electrically connected to the alarm 4, so that the controller 2 starts the alarm 4, so that the alarm 4 emits an alarm sound, thereby achieving the purpose of reminding the staff.

[0042] Embodiment 2:

[0043] In the above-mentioned first embodiment, since a plurality of battery packs 8 need to be installed in the battery box 1, in order to separate the plurality of battery packs 8 for the convenience of monitoring, the following structure is provided.

[0044] See also Figure 2-Figure 3 A plurality of partitions 5 are installed at the lower part of the battery box 1 , and the partitions 5 can separate the plurality of battery packs 8 , thereby facilitating monitoring of the status of the battery packs 8 , and the battery packs 8 are arranged between the plurality of partitions 5 .

[0045] Embodiment three:

[0046] In the above-mentioned second embodiment, in order to ensure that the side plate 10 is accurately aligned with the partition plate 5, the side plate 10 needs to be positioned, and thus the following structure is provided.

[0047] See also Figure 2-Figure 4 A positioning hole 6 is provided at the top of the partition 5, and a positioning column 7 extending into the positioning hole 6 is installed at the bottom of the side panel 10. The positioning column 7 is adapted to the positioning hole 6. When the side panel 10 is installed, the positioning column 7 at the bottom of the side panel 10 can be inserted into the positioning hole 6 on the partition 5 to play the role of positioning the side panel 10.

[0048] The working principle of the utility model is as follows: first, the staff installs the battery pack 8 inside the battery box 1, then installs the box cover 3, inserts the positioning column 7 at the bottom of the side plate 10 on the box cover 3 into the positioning hole 6 at the top of the partition 5, so as to play a role in positioning the side plate 10, and then fixes the box cover 3 on the battery box 1 by installing the bolts 9;

[0049] The temperature sensor 12 can monitor the temperature inside the battery box 1. If the monitored temperature is too high, it will transmit a signal to the controller 2, and the controller 2 will activate the alarm 4 to serve as a warning. At the same time, when the temperature inside the battery box 1 is too high and the air pressure increases, the gas will enter the air channel 1601 through the air guide hole 1602 and enter the cavity 1603. At this time, the piston 1607 will move up due to the air pressure, and drive the movable rod 1606 to move up, and then drive the movable plate 1604 to move up. The movable plate 1604 will drive the movable block 1612 to move up, so that the movable block 1612 squeezes the reset spring 1613, when the movable plate 1604 moves upward, it will drive multiple sealing plugs 1610 to move upward at the same time, so that the sealing plug 1610 no longer blocks the pressure relief hole 1609. At this time, the heat will be discharged through the pressure relief hole 1609, thereby achieving the purpose of pressure relief and heat dissipation, preventing the pressure sensor 15 from being damaged due to excessive air pressure in the battery box. After the heat dissipation and pressure relief are completed, the reset spring 1613 stretches, thereby driving the movable plate 1604 to move downward, and driving the sealing plug 1610 and the piston 1607 to move downward and reset, thereby covering the pressure relief hole 1609, preventing external impurities from entering the battery box 1 through the pressure relief hole 1609;

[0050] If the battery pack 8 swells, it will push the slide plate 11 to move, and the slide plate 11 will squeeze the pressure sensor 15. After the pressure sensor 15 is subjected to the force, it can transmit a signal to the controller 2, so that the controller 2 activates the alarm 4 to sound an alarm, so that the staff can replace the battery pack 8, thereby achieving the purpose of monitoring the battery.

[0051] Although an embodiment of the utility model has been shown and described, this specific embodiment is only an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A lithium battery status monitoring device, comprising a battery box (1), characterized in that: A box cover (3) is installed on the top of the battery box (1) by means of mounting bolts (9); a pressure relief assembly (16) is provided inside the box cover (3); and the pressure relief assembly (16) comprises a cavity (1603) and an air guide channel (1601) opened inside the box cover (3), a plurality of pressure relief holes (1609) opened above the inside of the box cover (3), a plurality of grooves (1611) opened on the top of the box cover (3), and a plurality of air guide holes (1602) opened on the bottom of the box cover (3); a gasket (1608) is provided inside the cavity (1603), and a piston (1607) is provided on the top of the gasket (1608); a movable rod (1606) extending to the top of the box cover (3) is provided on the top of the piston (1607), and a movable plate (1604) is fixed to the top of the movable rod (1606); and a plurality of sealing plugs (1610) are installed on the bottom of the movable plate (1604).

2. A lithium battery status monitoring device according to claim 1, characterized in that: A return spring (1613) is fixed on the upper part of the interior of the groove (1611), and a movable block (1612) is connected to the bottom end of the return spring (1613).

3. A lithium battery status monitoring device according to claim 2, characterized in that: The top of the movable block (1612) is provided with a connecting rod (1605) penetrating to the top of the box cover (3), and the top end of the connecting rod (1605) is connected to the bottom of the movable plate (1604).

4. A lithium battery status monitoring device according to claim 1, characterized in that: A plurality of partitions (5) are installed at the lower part of the battery box (1), a positioning hole (6) is opened at the top of the partition (5), and a battery pack (8) is arranged between the plurality of partitions (5).

5. A lithium battery status monitoring device according to claim 4, characterized in that: A plurality of side panels (10) are installed at the bottom of the box cover (3), and pressure sensors (15) and a plurality of telescopic rods (14) are respectively installed inside the side panels (10).

6. A lithium battery status monitoring device according to claim 5, characterized in that: One end of the telescopic rod (14) is connected to a slide plate (11), and one side of the slide plate (11) and one side of the side plate (10) are both installed with temperature sensors (12).

7. A lithium battery status monitoring device according to claim 6, characterized in that: The slide plate (11) is provided with a plurality of heat dissipation openings (13), and the plurality of heat dissipation openings (13) are evenly distributed on the slide plate (11).

8. A lithium battery status monitoring device according to claim 6, characterized in that: The slide plate (11) is slidably connected to the side plate (10), and the pressure sensor (15) is located on one side of the slide plate (11).

9. A lithium battery status monitoring device according to claim 5, characterized in that: A positioning column (7) extending into the interior of the positioning hole (6) is installed at the bottom of the side plate (10), and the positioning column (7) is adapted to the positioning hole (6).

10. A lithium battery status monitoring device according to claim 5, characterized in that: A controller (2) is installed on one side of the battery box (1), and the controller (2) is electrically connected to a pressure sensor (15) and a temperature sensor (12) respectively.

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