A battery pack of fire compartment

Abstract

The utility model relates to battery pack technical field discloses a kind of fire compartment's battery pack, including battery pack box, multiple partition horizontal plates and partition vertical plates are arranged in the battery pack box, the partition horizontal plate and partition vertical plate divide the entire battery pack into several fire compartments, the fire extinguishing assembly includes control valve, control valve output end is fixedly connected with infusion tube, the infusion tube bottom is fixedly connected with multiple spray heads, multiple spray heads are located in multiple fire compartments directly above, the bottom of battery pack box is provided with multiple pressure relief holes. In the utility model, when the battery in fire compartment ignites, the partition top spray head opens automatic sprinkling fire extinguishing, while the bottom rubber plug is pushed open, flame is injected downward along pressure relief hole, the effect of targeted fire extinguishing is achieved, the problem that traditional battery pack is difficult to accurately extinguish fire in the fire area when ignites, and is prone to cause fire spread and endanger personnel safety is solved, and the safety and efficiency of fire extinguishing are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery pack for fire-resistant compartments. Background Technology

[0002] As a core energy supply device in new energy vehicles and energy storage equipment, the safety and stability of battery packs directly affect the operational reliability of the entire system. With the rapid development of power battery technology, the energy density of battery packs is constantly improving, and the driving range and power output are continuously optimized. However, this also poses the risk of fire caused by battery thermal runaway. During battery thermal runaway, a large amount of heat, toxic gases, and flames are released. If not controlled in time, it can easily trigger a chain reaction, causing equipment damage or even personal injury.

[0003] In existing technologies, traditional battery packs typically employ an integrated casing structure, directly integrating multiple battery cells or modules within the casing, achieving basic thermal management solely through simple heat dissipation channels or insulation materials. Their safety protection largely relies on the battery management system (BMS) for power monitoring and overcharge protection.

[0004] However, existing battery packs lack effective partitioning and isolation structures. When a local battery experiences thermal runaway and catches fire, the flames and high temperatures can quickly spread throughout the entire battery pack, causing the fire to spread rapidly. At the same time, the overall fire extinguishing method is difficult to apply precisely to the fire area, resulting in low fire extinguishing efficiency. Furthermore, the direction of flame ejection is uncontrollable, which can easily cause burns or poisoning to people in the vicinity, seriously affecting the safety of use. Therefore, a fire-resistant partitioned battery pack is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a battery pack for fire-resistant compartments, which aims to improve the problem that existing battery packs are difficult to accurately target the fire area when they catch fire, and are very likely to cause the fire to spread and endanger personnel safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fire-resistant battery pack includes a battery pack box, the battery pack box having multiple horizontal and vertical partitions inside, the horizontal and vertical partitions dividing the entire battery pack into several fire-resistant compartments, the fire-resistant compartments being arranged in a rectangular array inside the battery pack box, and fire extinguishing components being installed above the fire-resistant compartments.

[0008] The fire extinguishing assembly includes a control valve, the bottom of which is fixedly connected to the interior of the fireproof assembly in the middle of one side of the battery pack box. An infusion tube is fixedly connected to the output end of the control valve, and multiple nozzles are fixedly connected to the bottom of the infusion tube. The multiple nozzles are all located directly above the multiple fireproof zones. Multiple pressure relief holes are opened at the bottom of the battery pack box, and the multiple pressure relief holes are all located at the bottom of the multiple fireproof assemblies. Rubber plugs are slidably connected to the inner walls of the multiple pressure relief holes.

[0009] As a further description of the above technical solution:

[0010] The battery pack is fixedly connected to all four sides of its outer wall with fixing plates. Each fixing plate has multiple bolt holes on its top, which are arranged in a linear array. These bolt holes are used to engage bolts to fix the battery pack as a whole.

[0011] As a further description of the above technical solution:

[0012] Multiple fireproof partitions are fixedly connected to both sides of the outer walls of the horizontal and vertical partitions. The fireproof partitions are distributed in an array and are located on the inner wall of the fireproof partition.

[0013] As a further description of the above technical solution:

[0014] Both sides of the partition plate are fixedly connected to the inner wall of the battery pack box. Both sides of the outer wall of the partition plate have multiple sets of limiting holes arranged in a horizontal array, and each set of limiting holes is arranged in a vertical straight line array.

[0015] As a further description of the above technical solution:

[0016] Both sides of the partition plate are fixedly connected to the inner wall of the battery pack box. Multiple limiting grooves are opened on the top of the partition plates. The limiting grooves are arranged in an array. The outer wall of the infusion tube is slidably connected to the inside of the limiting groove. The limiting groove is used to support the infusion tube and limit the position of the infusion tube.

[0017] As a further description of the above technical solution:

[0018] The bottom of the longitudinal dividing plate has multiple engaging grooves, which are arranged in an array. The inner wall of the engaging groove is slidably connected to the outer wall of the transverse dividing plate.

[0019] As a further description of the above technical solution:

[0020] Multiple limiting balls are provided on both sides of the inner wall of the locking groove. The positions of the limiting balls correspond to the positions of the limiting holes. A connecting plate is fixedly connected to the side wall of the limiting balls, and the outer wall of the connecting plate is slidably connected to the inside of the partition longitudinal plate.

[0021] As a further description of the above technical solution:

[0022] A reset spring is provided on the side of the connecting plate. One end of the reset spring is fixedly connected to the inside of the partition plate, and the other end of the reset spring is fixedly connected to the side wall of the connecting plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, when a battery in a fire compartment catches fire, the control valve opens, external fire extinguishing medium is injected into the infusion pipe, the top nozzle of the compartment opens and automatically sprays fire extinguishing, and at the same time the bottom center rubber stopper is pushed open by pressure, and the flames are sprayed downwards along the pressure relief hole, achieving the effect of targeted fire extinguishing without harming personnel. This solves the problem that traditional battery packs are difficult to accurately target the fire area when they catch fire, and are very easy to cause the fire to spread and endanger personnel safety, thus improving the safety and efficiency of fire extinguishing.

[0025] 2. In this utility model, the horizontal partition plate is first welded to the inner wall of the battery pack box, and the vertical partition plate is fitted with the horizontal partition plate through the locking groove. After being fixed by the limit locking ball pushed by the reset spring, the two ends of the vertical plate are also welded and fixed to the inner wall of the battery pack box, forming multiple fireproof partitions. This achieves the effect of ensuring the fireproof performance of each partition and enhancing the overall strength of the battery pack, solving the problems of poor sealing, insufficient fire resistance and low structural strength of traditional battery pack assembly methods, and improving the safety and stability of the battery pack. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a battery pack for a fire-resistant partition proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the pressure relief hole structure of a battery pack in a fireproof partition according to the present invention.

[0028] Figure 3 This is a schematic diagram of the infusion tube structure of a battery pack in a fireproof partition according to the present invention.

[0029] Figure 4 This is a schematic diagram of the longitudinal partition structure of a battery pack in a fireproof partition proposed in this utility model.

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Battery pack box; 2. Fixing plate; 3. Bolt holes; 4. Divider horizontal plate; 5. Divider vertical plate; 6. Limiting groove; 7. Engaging groove; 8. Fireproof partition; 9. Control valve; 10. Infusion tube; 11. Nozzle; 12. Pressure relief hole; 13. Rubber stopper; 14. Limiting hole; 15. Limiting ball; 16. Connecting plate; 17. Return spring. Detailed Implementation

[0033] 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.

[0034] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a fire-resistant battery pack, comprising a battery pack box 1. The battery pack box 1 is welded from Q235B steel plate and coated with fire-retardant paint. It is used to house battery modules and provide basic protection. Multiple horizontal and vertical partition plates 4 and 5, both made of fire-resistant steel plate, are installed inside the battery pack box 1. These partition plates 4 and 5 are welded perpendicularly to each other to form several rectangular fire-resistant partitions. This divides the entire battery pack interior into several separate fire-resistant partitions, which are arranged in a rectangular array inside the battery pack box 1 to separate different battery modules and prevent the spread of fire.

[0035] The fire extinguishing assembly above the fire compartment is used to specifically extinguish fires in a single compartment. It includes a control valve 9, which is a solenoid ball valve. The bottom of the control valve 9 is fixedly connected to the fire compartment inside the battery pack box 1, located in the middle of one side, via bolts. This control valve controls the flow of the extinguishing medium; it is existing technology and will not be described in detail here. The output end of the control valve 9 is fixedly connected to a stainless steel corrugated pipe 10 via clamps, used to deliver the extinguishing medium: heptafluoropropane. Multiple nozzles 11, which are total flooding sprinklers, are fixedly connected to the bottom of the pipe 10 via branch pipes. The head, with multiple nozzles 11 located directly above multiple fire compartments, is used to evenly spray the extinguishing medium into the corresponding fire compartments. This is existing technology and will not be described in detail here. The multiple pressure relief holes 12 at the bottom of the battery pack box 1 are circular holes. The multiple pressure relief holes 12 are located at the bottom of multiple fire compartments and are used to release pressure and guide the direction of flames during a fire. The rubber plugs 13, made of nitrile rubber, are slidably connected to the inner walls of the multiple pressure relief holes 12 and are interference-fitted with the pressure relief holes 12. They are used to seal the pressure relief holes 12 under normal conditions and can be opened by pressure during a fire.

[0036] The battery pack box 1 has Q235B steel plates 2 welded and fixed to all four sides of its outer wall. Multiple bolt holes 3 are arranged in a straight array on the top of the multiple fixed plates 2. The bolt holes 3 are used to fix the battery pack box 1 to the installation base with bolts to prevent displacement.

[0037] Reference Figure 4 and Figure 5 Multiple fireproof partitions 8 are fixedly connected to the outer walls of the horizontal partition 4 and the vertical partition 5 by high-temperature resistant adhesive. The fireproof partitions 8 are made of intumescent fireproof boards, distributed in an array, and located on the inner wall of the fire compartment to enhance the fireproof performance of the fire compartment and prevent flames and high temperatures from spreading through the gaps in the boards.

[0038] Both sides of the horizontal partition plate 4 are fixedly connected to the inner wall of the battery pack box 1 by welding. Multiple sets of horizontally arrayed limiting holes 14 are provided on both sides of the outer wall of the horizontal partition plate 4. Each set of limiting holes 14 is arranged in a vertical straight array. The limiting holes 14 are round holes used to cooperate with the limiting ball 15 to position the vertical partition plate 5. Both sides of the vertical partition plate 5 are fixedly connected to the inner wall of the battery pack box 1 by welding. Multiple limiting grooves 6 are provided at the top of the vertical partition plates 5. The limiting grooves 6 are U-shaped grooves with a width adapted to the outer diameter of the infusion tube 10, and are arranged in an array. The outer wall of the infusion tube 10 is clearance-fitted with the inner wall of the limiting groove 6, slidingly connected inside the limiting groove 6. The limiting groove 6 is used to support the infusion tube 10 and limit its horizontal displacement to prevent the infusion tube 10 from shaking. Multiple engaging grooves 7 are provided at the bottom of the vertical partition plate 5. The engaging grooves 7 are rectangular grooves with a depth consistent with the thickness of the horizontal partition plate 4, and are arranged in an array. The inner wall of the engaging groove 7 is flush with the outer wall of the horizontal partition plate 4. The sliding fit is slidably connected to the outer wall of the horizontal partition plate 4 to achieve the cross connection between the horizontal partition plate 4 and the vertical partition plate 5. Multiple limiting balls 15 are provided on both sides of the inner wall of the locking groove 7. The limiting balls 15 are made of bearing steel and their positions correspond one-to-one with the positions of the limiting holes 14. They are used to lock into the limiting holes 14 to fix the vertical partition plate 5 and the horizontal partition plate 4. The side wall of the limiting balls 15 is fixedly connected to the connecting plate 16 by welding. The connecting plate 16 is made of 304 stainless steel plate and its outer wall is slidably fitted with the sliding groove inside the vertical partition plate 5. It is slidably connected inside the vertical partition plate 5 to transmit the force of the return spring 17 to the limiting balls 15. The return spring 17 provided on the side of the connecting plate 16 is made of spring steel. One end of it is welded and fixedly connected to the spring seat inside the vertical partition plate 5, and the other end is welded and fixedly connected to the side wall of the connecting plate 16 to provide continuous radial thrust to the limiting balls 15 to ensure a tight fit with the limiting holes 14.

[0039] Working principle: When assembling the battery pack, the fireproof partition 8 is first pasted onto the outer walls of the horizontal partition 4 and the vertical partition 5. Then, the left and right sides of the horizontal partition 4 are welded to the inside of the battery pack box 1 using a welding machine. Next, the two engaging grooves 7 at the bottom of the vertical partition 5 are aligned with the top of the vertical partition 5. Then, the vertical partition 5 is pressed down, causing the engaging grooves 7 to slide into the outer wall of the vertical partition 5. At this time, the limiting balls 15 on both sides inside the engaging grooves 7 are first squeezed by the outer wall of the vertical partition 5, which in turn causes the connecting plate 16 to retract and squeeze out the fireproof partition 8. When the outer wall of the partition plate 5 is fully engaged with the locking groove 7, the return spring 17 pushes the connecting plate 16 back to reset, thereby causing the limiting ball 15 to be engaged in the limiting hole 14 at the corresponding position on the outer wall of the partition plate 5, thus completing the positioning. Then, the workers weld the two ends of the partition plate 5 to the inner wall of the battery pack box 1 in sequence. In this way, multiple fireproof partitions are formed by the combination of the partition plate 4 and the partition plate 5, thereby achieving the effect of ensuring good fireproof performance between each fireproof partition and increasing the overall strength of the battery pack.

[0040] When using this battery pack, if a battery in a fire compartment catches fire, the control valve 9 opens, allowing external extinguishing medium to be injected into the infusion pipe 10. Subsequently, the nozzle 11 at the top of the fire compartment opens and automatically sprays the extinguishing medium until the entire fire compartment is filled with the extinguishing medium. At the same time, the rubber stopper 13 at the bottom center of the fire compartment is pushed open by pressure, causing the flames from the burning battery to spray downwards along the pressure relief hole 12. The sprayed flames will not cause harm to people, thus achieving the effect of targeted fire extinguishing without harming personnel.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery pack for fire-resistant compartments, comprising a battery pack case (1), characterized in that: The battery pack box (1) is provided with multiple horizontal partitions (4) and vertical partitions (5) inside. The horizontal partitions (4) and vertical partitions (5) divide the entire battery pack into several fire-resistant partitions. The fire-resistant partitions are distributed in a rectangular array inside the battery pack box (1). Fire extinguishing components are provided above the fire-resistant partitions. The fire extinguishing assembly includes a control valve (9), the bottom of which is fixedly connected to the fireproof assembly inside the middle of one side of the battery pack box (1). The output end of the control valve (9) is fixedly connected to an infusion tube (10), and the bottom of the infusion tube (10) is fixedly connected to multiple nozzles (11). The multiple nozzles (11) are all located directly above the multiple fireproof zones. The bottom of the battery pack box (1) is provided with multiple pressure relief holes (12), which are all located at the bottom of the multiple fireproof assemblies. The inner walls of the multiple pressure relief holes (12) are slidably connected with rubber stoppers (13).

2. The battery pack for a fire-resistant partition according to claim 1, characterized in that: The battery pack box (1) is fixedly connected to a fixing plate (2) on all four sides of its outer wall. The top of each fixing plate (2) is provided with multiple bolt holes (3). The bolt holes (3) are arranged in a straight line array and are used to fix the battery pack box (1) as a whole with bolts.

3. The battery pack for a fire-resistant partition according to claim 1, characterized in that: Multiple fireproof partitions (8) are fixedly connected to both sides of the outer walls of the horizontal partition (4) and the vertical partition (5). The fireproof partitions (8) are arranged in an array and are located on the inner wall of the fireproof partition.

4. The battery pack for a fire-resistant partition according to claim 3, characterized in that: Both sides of the partition plate (4) are fixedly connected to the inner wall of the battery pack box (1). Both sides of the outer wall of the partition plate (4) are provided with multiple sets of limiting holes (14) arranged in a horizontal array. Each set of limiting holes (14) is arranged in a vertical straight array.

5. The battery pack for a fire-resistant partition according to claim 4, characterized in that: Both sides of the partition plate (5) are fixedly connected to the inner wall of the battery pack box (1). Multiple limiting grooves (6) are opened on the top of the partition plates (5). The limiting grooves (6) are arranged in an array. The outer wall of the infusion tube (10) is slidably connected to the inside of the limiting groove (6). The limiting groove (6) is used to support the infusion tube (10) and limit the position of the infusion tube (10).

6. The battery pack for a fire-resistant partition according to claim 5, characterized in that: The bottom of the dividing longitudinal plate (5) is provided with multiple engaging grooves (7), which are arranged in an array. The inner wall of the engaging grooves (7) is slidably connected to the outer wall of the dividing transverse plate (4).

7. The battery pack for a fire-resistant partition according to claim 6, characterized in that: Multiple limiting balls (15) are provided on both sides of the inner wall of the locking groove (7). The positions of the limiting balls (15) correspond to the positions of the limiting holes (14). A connecting plate (16) is fixedly connected to the side wall of the limiting balls (15). The outer wall of the connecting plate (16) is slidably connected to the interior of the partition plate (5).

8. The battery pack for a fire-resistant partition according to claim 7, characterized in that: A reset spring (17) is provided on the side of the connecting plate (16). One end of the reset spring (17) is fixedly connected to the inside of the partition plate (5), and the other end of the reset spring (17) is fixedly connected to the side wall of the connecting plate (16).

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