Mine explosion-proof lithium ion battery

Abstract

The utility model discloses a mine -used explosion -proof type lithium ion battery belongs to mine lithium battery technical field, including explosion -proof side plate, explosion -proof reinforcing rib, battery installation baffle and explosion -proof cover, the explosion -proof side plate inner wall is provided with battery installation cavity, wiring cavity and control cavity, the utility model discloses a power box structure of double -deck structure is provided, and the compact design of three -chamber configuration has improved the power storage capacity of power supply greatly, is favorable to the continuous stable use of mine car, adopts 100 single cell capacity 230Ah (nominal voltage 3.2V), system voltage 320V, energy density reaches 165Wh / kg lithium battery series connection, through the design of modularization architecture, supports flexible extension, is favorable to adapting the use of larger load car type.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology for mining, and in particular to an explosion-proof lithium-ion battery for mining. Background Technology

[0002] Trackless rubber-wheeled vehicles are transportation tools specially designed for complex environments such as mines and tunnels. The vehicles rely on battery packs for power to move and operate electrical equipment, and the battery packs are usually equipped with explosion-proof measures.

[0003] For example, a mine-use explosion-proof lithium-ion battery power supply box (document number CN215816099U) includes a box body, a box cover, a lithium battery pack, a battery management component, and a charging / discharging device. The box cover is flange-connected and fixed to the box body, and all mating surfaces of the box body and the box cover are explosion-proof mating surfaces. Both the box body and the box cover are made of high-strength steel. The lithium battery pack and the battery management component are fixed inside the box body, and the charging / discharging device is fixed to the bottom outer side of the left front of the box body. This mine-use explosion-proof lithium-ion battery power supply box has a compact structure, uses high-strength steel and explosion-proof design, improving the safety performance of the power supply box. At the same time, the lithium battery pack, battery management component, and charging / discharging device have all been improved to varying degrees, enhancing the charging performance and power supply capacity of the power supply box, making it highly practical.

[0004] In the aforementioned comparative documents, the lithium battery power box adopts a single-layer layout. Although the structure is compact and reduces the weight of the power box, it also limits the number of lithium battery modules. At the same time, its installation structure also limits the expansion of the lithium battery, so it is not suitable for heavy-duty vehicles.

[0005] To address the aforementioned issues, a mine-use explosion-proof lithium-ion battery was proposed. Utility Model Content

[0006] The main purpose of this invention is to provide an explosion-proof lithium-ion battery for mining, which solves the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved by adopting the following technical solution: A mining explosion-proof lithium-ion battery includes an explosion-proof side plate, an explosion-proof reinforcing rib, a battery mounting partition, and an explosion-proof cover plate. The inner wall of the explosion-proof side plate is provided with a battery mounting cavity, a wiring cavity, and a control cavity. The battery mounting cavity is equipped with lithium battery packs located on the upper and lower layers of the battery mounting partition. A charging assembly and an output assembly are installed through one side wall panel of the wiring cavity. The control cavity is equipped with a display, a safety barrier, and an inverter. The top of the lithium battery pack is electrically connected to a quick-change plug; The charging plug of the charging assembly is equipped with a safety lock.

[0008] Furthermore, the explosion-proof side plate, explosion-proof reinforcing rib, battery mounting partition, and explosion-proof cover are all made of high-strength metal materials. The battery mounting partition has a double-layer structure. The contact surfaces between the battery mounting partition, the explosion-proof side plate, and the explosion-proof side plate are welded together. The explosion-proof cover is bolted to the top battery mounting partition.

[0009] Furthermore, the battery mounting cavity is divided into upper and lower layers, and the lithium battery pack is composed of 100 / 3.2V / 230ah battery cells.

[0010] Furthermore, a second terminal block electrically connected to the charging assembly and the output assembly is provided through the other side wall panel of the wiring cavity, and the other end of the second terminal block extends into the control cavity.

[0011] Furthermore, a first terminal block electrically connected to the lithium battery pack is provided through the sandwich wall plate between the control cavity and the battery mounting cavity, and the input end of the first terminal block is electrically connected to the second terminal block.

[0012] Furthermore, the display, the safety barrier, and the inverter are all electrically connected to the first terminal block and the second terminal block.

[0013] Furthermore, the quick-connect plug is explosion-proof, and a locking device can be detachably installed on the top of the lithium battery pack. A battery management system electrically connected to the lithium battery pack is provided on the top of the locking device.

[0014] Furthermore, a power switch is provided on the outer side of the explosion-proof side plate, which is connected to the wire of the first terminal of the lithium battery pack.

[0015] Furthermore, the safety lock includes an electromagnetic lock fastened to the charging assembly, with a mechanical lock cylinder provided on one side inside the electromagnetic lock and a mechanical lock rod provided directly above the electromagnetic lock.

[0016] The beneficial technical effects of this utility model are as follows: 1. This utility model, by setting a double-layer power supply box structure and configuring a compact three-chamber design, greatly improves the power storage capacity of the power supply, which is conducive to the continuous and stable use of the mine car. 2. It adopts 100 individual lithium batteries with a capacity of 230Ah (nominal voltage 3.2V), a system voltage of 320V, and an energy density of 165Wh / kg connected in series. Through the modular architecture design, it supports flexible expansion and is conducive to the use of larger load-bearing vehicles.

[0017] 3. The battery pack is equipped with explosion-proof quick-change plugs (CAN communication + high-voltage DC interface), with optimized battery swapping compatibility, greatly reducing the battery swapping time (mechanical locking + system detection); 4. The battery pack adopts full laser welding technology to ensure safety under high vibration levels, and at the same time has high over-current capacity, with a maximum continuous discharge capacity of 1.5C; 5. The charger uses a safety lock composed of a mechanical lock + an electromagnetic lock to achieve plugging and unplugging locking, improving charging safety; 6. Safety barriers are set in the control area and wiring area, greatly improving the safety of battery input and output; 7. An inverter is set to enable the output of high and low voltages externally, which is beneficial for use as an emergency power source outdoors. Description of the Drawings

[0018] Figure 1 It is a front view structural schematic diagram of a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model; Figure 2 It is a front view perspective view after the explosion-proof cover plate is opened in a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model; Figure 3 It is a top view structural schematic diagram after the explosion-proof cover plate is opened in a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model; Figure 4 It is a rear view perspective view after the explosion-proof cover plate is opened in a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model; Figure 5 In a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model Figure 4 The enlarged view of part A; Figure 6 It is an exploded view of the parts of the safety lock in a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model; Figure 7 It is a structural schematic diagram after removing the explosion-proof side plate and explosion-proof cover plate in a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model; Figure 8 It is an electrical schematic diagram of a preferred embodiment of a mine explosion-proof lithium-ion battery according to the present utility model.

[0019] The description of the reference numerals is as follows: 1. Explosion-proof side plate; 2. Explosion-proof reinforcing rib; 3. Battery installation partition; 4. Explosion-proof cover plate; 5. Output assembly; 6. Charging assembly; 7. First terminal; 8. Display; 9. Safety barrier; 10. Power supply gate rod; 11. Second terminal; 12. Lithium battery pack; 1201. Quick-change plug; 1202. Locking piece; 13. Battery management system; 14. Inverter; 15. Safety lock; 1501. Mechanical lock rod; 1502. Mechanical lock core; 1503. Electromagnetic lock. Specific implementation manner

[0020] To make the technical solutions of the present utility model clearer and more definite for those skilled in the art, the present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings. However, the implementation manners of the present utility model are not limited thereto.

[0021] As Figures 1-8 shown, a mine explosion-proof lithium-ion battery provided in this embodiment includes an explosion-proof side plate 1, an explosion-proof reinforcing rib 2, a battery installation partition 3, and an explosion-proof cover plate 4. A battery installation cavity, a wiring cavity, and a control cavity are provided in the inner wall of the explosion-proof side plate 1; lithium battery packs 12 are provided in the battery installation cavity above and below the battery installation partition 3. A charging assembly 6 and an output assembly 5 are penetrated and arranged in a side wall plate of the wiring cavity. A display 8, a safety barrier 9, and an inverter 14 are provided in the control cavity; a quick-change plug 1201 is electrically connected to the top of the lithium battery pack 12; a safety lock 15 is provided on the charging plug of the charging assembly 6.

[0022] The explosion-proof side plate 1, the explosion-proof reinforcing rib 2, the battery installation partition 3, and the explosion-proof cover plate 4 are all made of high-strength metal materials. The battery installation partition 3 is of a double-layer structure. The contact surfaces between the battery installation partition 3, the explosion-proof side plate 1, and the explosion-proof side plate 1 are welded. The explosion-proof cover plate 4 is bolt-mounted to the top battery installation partition 3. The volume of the power supply box can be continuously expanded on the top battery installation partition 3 as needed to increase the expansion amount of the battery.

[0023] The battery installation cavity is divided into upper and lower layers. The lithium battery pack 12 is composed of battery cores of 100 / 3.2V / 230ah, equipped with a 74kWh lithium iron phosphate battery system. The system voltage is 320V, and the energy density reaches 165Wh / kg, adapting to the power requirements of heavy-duty mining vehicles. The full-system cycle life > 4000 times, and the capacity retention rate ≥ 80%.

[0024] A second terminal 11 electrically connected to the charging assembly 6 and the output assembly 5 is penetrated and arranged in another side wall plate of the wiring cavity. The other end of the second terminal 11 extends into the control cavity. The charging assembly 6 consists of a charger and a charging socket. The output assembly 5 is used to output direct current.

[0025] A first terminal 7 electrically connected to the lithium battery pack 12 is disposed through the sandwich wall plate between the control cavity and the battery installation cavity. The input end of the first terminal 7 is electrically connected to a second terminal 11.

[0026] A display 8, a safety barrier 9, and an inverter 14 are all electrically connected to the first terminal 7 and the second terminal 11. The display content of the display 8 includes basic information, working status, and warning status of individual battery cells. The safety barrier 9, also known as a safety energy limiter, is an important part of the intrinsically safe system, used to protect the input current and output current, preventing excessive external output from causing damage to the battery and the human body. In this application, the safety barrier 9 can effectively improve the safety of use of the lithium battery pack 12. The inverter 14 is used to output a specified voltage, so that in addition to supplying power to the vehicle, the battery can also be provided to external devices within a wider output range, improving the outdoor property of the power supply.

[0027] The quick-change plug 1201 is of explosion-proof type. A locking member 1202 is detachably installed on the top of the lithium battery pack 12. A battery management system 13 electrically connected to the lithium battery pack 12 is provided on the top of the locking member 1202. The quick-change plug 1201 supports CAN communication + high-voltage DC interface, and the battery swapping time ≤ 3 minutes. The battery management system 13 performs functions such as real-time monitoring of battery parameters, fault diagnosis, SOC estimation, short-circuit protection, insulation detection, charge and discharge control, and equalization, and conducts information interaction through RS485 communication and CAN2.0 methods to ensure the efficient, reliable, and safe operation of the terminal device, and is connected to the display 8 to accurately display the working conditions of the lithium battery pack 12.

[0028] On the outer side of the explosion-proof side plate 1, a power switch rod 10 electrically connected to the first terminal 7 of the lithium battery pack 12 is provided. The power switch rod 10 facilitates manual operation of opening and cutting off the power to protect the safety of the lithium battery.

[0029] The safety lock 15 includes an electromagnetic lock 1503 fastened to the charging assembly 6. A mechanical lock core 1502 is provided on one side inside the electromagnetic lock 1503. A mechanical lock rod 1501 is provided directly above the electromagnetic lock 1503. First, the electromagnetic lock 1503 is closed through an external control device. After the electromagnetic lock 1503 loses power, it loses its magnetic force, so that the locked lock rod can be pulled out. Then the lock rod is inserted into the mechanical lock core 1502 and rotated counterclockwise to safely unplug the charger from the charging socket, achieving the purpose of safety protection.

[0030] The electromagnetic lock 1503 is a common magnetic adsorption lock. Its principle is based on the electro-magnetic effect. An electromagnet is excited by an electric current to generate a magnetic field, and the iron plate is adsorbed to achieve locking; the magnetic field disappears after power-off to unlock. The electromagnetic lock 1503 is controlled by the vehicle computer.

[0031] Above is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the present utility model, according to the technical solution and its concept of the present utility model, making equivalent substitutions or changes, all belong to the protection scope of the present utility model.

[0032] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the records in the specification and drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common knowledge in this field. And this application document is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this application document.

Claims

1. A mine-use explosion-proof lithium-ion battery, comprising an explosion-proof side plate (1), an explosion-proof reinforcing rib (2), a battery mounting plate (3), and an explosion-proof cover plate (4), characterized in that: The explosion-proof side plate (1) has a battery mounting cavity, a wiring cavity and a control cavity in its inner wall; The battery mounting cavity is provided with a lithium battery pack (12) located on the upper and lower layers of the battery mounting partition (3). A charging assembly (6) and an output assembly (5) are provided through one side wall panel of the wiring cavity. A display (8), a safety barrier (9) and an inverter (14) are provided in the control cavity. The top of the lithium battery pack (12) is electrically connected to a quick-connect plug (1201). The charging plug of the charging assembly (6) is equipped with a safety lock (15).

2. The explosion-proof lithium-ion battery for mining as described in claim 1, characterized in that: The explosion-proof side plate (1), explosion-proof reinforcing rib (2), battery mounting partition (3) and explosion-proof cover plate (4) are all made of high-strength metal materials. The battery mounting partition (3) has a double-layer structure. The contact surfaces between the battery mounting partition (3), the explosion-proof side plate (1) and the explosion-proof side plate (1) are welded. The explosion-proof cover plate (4) is bolted to the top of the battery mounting partition plate (3).

3. The explosion-proof lithium-ion battery for mining as described in claim 2, characterized in that: The battery mounting cavity is divided into upper and lower layers, and the lithium battery pack (12) is composed of 100 / 3.2V / 230ah battery cells.

4. The explosion-proof lithium-ion battery for mining as described in claim 3, characterized in that: A second terminal (11) electrically connected to the charging assembly (6) and the output assembly (5) is provided through the other side wall of the wiring cavity, and the other end of the second terminal (11) extends into the control cavity.

5. The explosion-proof lithium-ion battery for mining as described in claim 4, characterized in that: A first terminal (7) electrically connected to the lithium battery pack (12) is provided through the sandwich wall plate between the control cavity and the battery mounting cavity. The input end of the first terminal (7) is electrically connected to the second terminal (11).

6. The explosion-proof lithium-ion battery for mining as described in claim 5, characterized in that: The display (8), the safety barrier (9), and the inverter (14) are all electrically connected to the first terminal (7) and the second terminal (11).

7. The explosion-proof lithium-ion battery for mining as described in claim 6, characterized in that: The quick-connect plug (1201) is explosion-proof. The top of the lithium battery pack (12) can also be detachably installed with a locking component (1202). The top of the locking component (1202) is provided with a battery management system (13) that is electrically connected to the lithium battery pack (12).

8. The explosion-proof lithium-ion battery for mining as described in claim 7, characterized in that: The explosion-proof side plate (1) is provided with a power switch (10) on the outer side, which is connected to the wire of the first terminal (7) of the lithium battery pack (12).

9. The explosion-proof lithium-ion battery for mining as described in claim 8, characterized in that: The safety lock (15) includes an electromagnetic lock (1503) fastened to the charging assembly (6), a mechanical lock core (1502) is provided on one side inside the electromagnetic lock (1503), and a mechanical lock rod (1501) is provided directly above the electromagnetic lock (1503).

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