A battery box for improving fire extinguishing safety performance

Abstract

The present invention discloses a battery box for improving fire extinguishing safety performance. The battery box includes a box body, and a plurality of battery cell chambers are arranged in the box body, and a plurality of battery cells are arranged in each battery cell chamber; wherein: a heat dissipation air duct is arranged between adjacent battery cell chambers, and a temperature probe is arranged in the heat dissipation air duct; each battery cell chamber is connected with an aerosol storage device, the electrical signal input end of the aerosol storage device is connected with the temperature probe, and the aerosol output ends of the aerosol storage device are respectively connected with a plurality of the battery cell chambers; when the aerosol storage device fills the battery cell chambers with aerosol, the aerosol is sprayed onto a plurality of the battery cells. By sealing and isolating the heat dissipation air duct in the battery box from the exhaust space of the battery cells, when a thermal runaway occurs in the battery cells, the aerosol fire extinguishing medium fills the inside of the battery box, and a large amount of the fire extinguishing medium will not overflow to the outside of the battery box through the internal heat dissipation air duct, thereby improving the fire extinguishing performance of the aerosol medium itself.

Description

Technical Field

[0001] The present invention relates to the technical field of battery boxes, and particularly to a battery box with improved fire extinguishing safety performance. Background Art

[0002] Currently, there are more and more cases of using lithium batteries for photovoltaic energy storage power generation, and the safety of lithium batteries themselves has also attracted wide attention. Among them, overcharging, over-discharging, and cycle life are the key points affecting safety performance. However, not every product can have a fully reliable safety design. When a lithium battery undergoes thermal runaway, how to ensure fire extinguishing and avoid life and property losses around the photovoltaic energy storage site caused by battery fires. In the designs of most current energy storage containers and energy storage cabinets, aerosol fire extinguishing devices are mostly used. However, due to the air-cooled design scheme, the IP protection of the box itself is IP20, which greatly reduces the success rate of fire extinguishing and thus easily affects its own safety design.

[0003] Therefore, how to improve the fire extinguishing performance inside the battery box is a technical problem that urgently needs to be solved.

[0004] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main purpose of the present invention is to provide a battery box with improved fire extinguishing safety performance, aiming to solve the technical problem of poor fire extinguishing performance caused by the mutual interference between the heat dissipation duct and the fire extinguishing space inside the current battery box.

[0006] To achieve the above object, the present invention provides a battery box with improved fire extinguishing safety performance, including: a box body, wherein a plurality of battery cell chambers are arranged inside the box body, and a plurality of battery cells are arranged in each battery cell chamber; among them:

[0007] A heat dissipation duct is arranged between adjacent battery cell chambers, and a temperature probe is arranged inside the heat dissipation duct;

[0008] Each battery cell chamber is connected to an aerosol storage device, the electrical signal input end of the aerosol storage device is connected to the temperature probe, and the aerosol output end of the aerosol storage device is respectively connected to a plurality of battery cell chambers;

[0009] When the aerosol storage device fills the battery cell chamber with aerosol, the aerosol is sprayed onto a plurality of battery cells.

[0010] Optionally, the battery cell chamber is provided with a battery cell space and an exhaust space, and the aerosol output end of the aerosol storage device is connected to the exhaust space of the battery cell chamber.

[0011] Optionally, an internal insulating sheet is provided between the battery cell space and the exhaust space. The insulating sheet is provided with a plurality of fire extinguishing holes corresponding to each battery cell. When the aerosol storage device fills the aerosol into the battery cell cavity, the aerosol is ejected onto the corresponding battery cell through the fire extinguishing holes.

[0012] Optionally, sealing rubber strips are respectively provided on both sides of each battery cell cavity to internally compartmentalize and isolate the heat dissipation air duct and the battery cell cavity.

[0013] Optionally, the position of the temperature probe is set at the place where the sum of the distances from all battery cells to the temperature probe is the smallest.

[0014] Optionally, there are two battery cell cavities, and the heat dissipation air duct is arranged between the two battery cell cavities.

[0015] Optionally, the aerosol storage device is arranged at any end of the heat dissipation air duct and is respectively connected to the two battery cell cavities through aerosol output ends.

[0016] Optionally, when the aerosol storage device fills the aerosol into the battery cell cavity, a radiation ejection method is adopted so that each battery cell in the battery cell cavity is ejected with aerosol.

[0017] A battery box for improving fire extinguishing safety performance proposed in an embodiment of the present invention. The battery box for improving fire extinguishing safety performance includes a box body. A plurality of battery cell cavities are provided in the box body, and a plurality of battery cells are arranged in each battery cell cavity. Among them: a heat dissipation air duct is provided between adjacent battery cell cavities, and a temperature probe is arranged in the heat dissipation air duct; each battery cell cavity is connected to an aerosol storage device. The electrical signal input end of the aerosol storage device is connected to the temperature probe, and the aerosol output end of the aerosol storage device is respectively connected to a plurality of battery cell cavities; when the aerosol storage device fills the aerosol into the battery cell cavity, the aerosol is ejected onto a plurality of battery cells. By hermetically isolating the heat dissipation air duct in the battery box from the exhaust space of the battery cells, when a battery cell undergoes thermal runaway, the aerosol fire extinguishing medium fills the interior of the battery box, and a large amount of the fire extinguishing medium will not overflow to the outside of the battery box through the internal heat dissipation air duct, thereby improving the fire extinguishing performance of the aerosol medium itself. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a battery box for improving fire extinguishing safety performance in an embodiment of the present invention.

[0019] Description of the Reference Numerals:

[0020] 1 - Box body; 2 - Battery cell cavity; 3 - Heat dissipation air duct; 4 - Temperature probe; 5 - Aerosol storage device; 6 - Aerosol output end; 7 - Internal insulating sheet; 8 - Fire extinguishing hole.

[0021] The realization, functional features, and advantages of the present invention will be further described in conjunction with embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0022] It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0023] Currently, in the related technical fields, in the designs of most energy storage containers and energy storage cabinets, aerosol fire extinguishing devices are mostly used. However, due to the air-cooled design scheme, the IP protection of the box body itself is IP20, which greatly reduces the success rate of fire extinguishing and thus easily affects the safety design itself.

[0024] To solve this problem, various embodiments of the battery box for improving fire extinguishing safety performance of the present invention are proposed. The battery box for improving fire extinguishing safety performance provided by the present invention seals and isolates the heat dissipation air duct in the battery box from the exhaust space of the battery cells. When a thermal runaway occurs in the battery cells, the aerosol fire extinguishing medium fills the inside of the battery box, and a large amount of the fire extinguishing medium will not overflow to the outside of the battery box through the internal heat dissipation air duct, thereby improving the fire extinguishing performance of the aerosol medium itself.

[0025] Refer to Figure 1 , Figure 1 is a schematic structural diagram of the battery box for improving fire extinguishing safety performance according to the embodiment solution of the present invention.

[0026] The embodiment of the present invention provides a battery box for improving fire extinguishing safety performance. The battery box includes: a box body 1, and a plurality of battery cell chambers 2 are provided in the box body 1, and a plurality of battery cells are arranged in each battery cell chamber 2.

[0027] It should be noted that a heat dissipation air duct 3 is provided between adjacent battery cell chambers 2, and a temperature probe 4 is provided in the heat dissipation air duct 3; each battery cell chamber 2 is connected to an aerosol storage device 5, the electrical signal input end of the aerosol storage device 5 is connected to the temperature probe 4, and the aerosol output ends 6 of the aerosol storage device 5 are respectively connected to a plurality of the battery cell chambers 2; when the aerosol storage device 5 fills the battery cell chambers 2 with aerosol, the aerosol is sprayed onto a plurality of the battery cells.

[0028] In this embodiment, the aerosol storage device 5 is arranged in the box body 1 and connected to each battery cell chamber 2. The aerosol for fire extinguishing is filled into the battery cell chamber 2 from the aerosol output end 6, and thus the aerosol is sprayed onto the battery cells to achieve the fire extinguishing performance.

[0029] In a preferred embodiment, the battery cell chamber 2 is provided with a battery cell space and an exhaust space, and the aerosol output end 6 of the aerosol storage device 5 is connected to the exhaust space of the battery cell chamber 2.

[0030] It should be noted that an internal insulating sheet 7 is provided between the battery cell space and the exhaust space. The insulating sheet 7 is provided with a plurality of fire extinguishing holes 8 corresponding to each battery cell. When the aerosol storage device 5 fills the battery cell cavity 2 with aerosol, the aerosol is sprayed onto the corresponding battery cell through the fire extinguishing holes 8.

[0031] In this embodiment, the internal cavity corresponding to the internal heat dissipation design inside the box body 1 is separated from the fire extinguishing cavity inside the battery box, thereby preventing the aerosol from overflowing to the outside of the battery box through the heat dissipation air duct and improving the fire extinguishing performance of the aerosol medium in the battery box.

[0032] In a preferred embodiment, sealing rubber strips are respectively provided on both sides of each battery cell cavity 2 to internally partition and isolate the heat dissipation air duct 3 and the battery cell cavity 2.

[0033] It should be noted that D-shaped sealing rubber strips are respectively added on both sides of the battery cell cavity 2 to seal the battery cells, separate the internal heat dissipation air duct 3 from the interior of the battery compartment, and design a sealing structure form in the fire extinguishing space inside the battery box, thereby improving the fire extinguishing availability and increasing the fire extinguishing safety.

[0034] In a preferred embodiment, there are two battery cell cavities 2, the heat dissipation air duct 3 is arranged between the two battery cell cavities 2, and the position of the temperature probe 4 is set at the place where the sum of the distances from all battery cells to the temperature probe 4 is the smallest.

[0035] In this embodiment, each battery cell cavity 2 is provided with 6 battery cells, and two battery cell cavities 2 are arranged inside the battery box and separated by the heat dissipation air duct 3. Therefore, the temperature probe 4 inside the battery box can be designed to be centered to fully ensure that the induction distance of 12 battery cells is the smallest.

[0036] In a preferred embodiment, the aerosol storage device 5 is arranged at any one end of the heat dissipation air duct 3 and is respectively connected to the two battery cell cavities 2 through the aerosol output end 6. When the aerosol storage device 5 fills the battery cell cavity 2 with aerosol, a radiation spraying method is adopted so that each battery cell in the battery cell cavity 2 is sprayed with aerosol.

[0037] In this embodiment, based on the design that each battery cell cavity 2 is provided with 6 battery cells, two battery cell cavities 2 are arranged inside the battery box and separated by the heat dissipation air duct 3, the aerosol storage device 5 can be centered and arranged at any one end of the heat dissipation air duct 3. When filling the battery cell cavity 2 with aerosol through the aerosol output end 6, the fire extinguishing direction can be designed to radiate into the two battery cell cavities 2 respectively to ensure the radiation area of 12 battery cells and achieve the best fire extinguishing effect.

[0038] In this embodiment, a battery box with improved fire extinguishing safety performance is provided. By sealing and isolating the heat dissipation air duct in the battery box from the exhaust space of the battery cells, when a thermal runaway occurs in the battery cells, the aerosol fire extinguishing medium fills the inside of the battery box, and a large amount of the fire extinguishing medium will not overflow to the outside of the battery box through the internal heat dissipation air duct, thereby improving the fire extinguishing performance of the aerosol medium itself.

[0039] The above are only the preferred embodiments of the invention, and do not limit the patent scope of the invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the invention specification and drawings, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the invention.

Claims

1. A battery box for improving fire extinguishing safety performance, characterized in that, it includes: a box body, in which several battery cell cavities are provided, and several battery cells are arranged in each battery cell cavity; where: a heat dissipation air duct is provided between adjacent battery cell cavities, and a temperature probe is arranged in the heat dissipation air duct; each battery cell cavity is connected to an aerosol storage device, the electrical signal input end of the aerosol storage device is connected to the temperature probe, and the aerosol output end of the aerosol storage device is respectively connected to several battery cell cavities; when the aerosol storage device fills the battery cell cavity with aerosol, the aerosol is sprayed onto several battery cells; the battery cell cavity is provided with a battery cell space and an exhaust space, and the aerosol output end of the aerosol storage device is connected to the exhaust space of the battery cell cavity; an internal insulating sheet is provided between the battery cell space and the exhaust space, and several fire extinguishing holes corresponding to each battery cell are opened in the insulating sheet. When the aerosol storage device fills the battery cell cavity with aerosol, the aerosol is sprayed onto the corresponding battery cell through the fire extinguishing holes; sealing rubber strips are respectively arranged on both sides of each battery cell cavity to conduct internal compartment isolation for the heat dissipation air duct and the battery cell cavity.

2. The battery box for improving fire extinguishing safety performance according to claim 1, characterized in that, the position of the temperature probe is set at the place where the sum of the distances from all battery cells to the temperature probe is the smallest.

3. The battery box for improving fire extinguishing safety performance according to claim 1, characterized in that, there are two battery cell cavities, and the heat dissipation air duct is arranged between the two battery cell cavities.

4. The battery box for improving fire extinguishing safety performance according to claim 3, characterized in that, the aerosol storage device is arranged at any end of the heat dissipation air duct and is respectively connected to two battery cell cavities through the aerosol output end.

5. The battery box for improving fire extinguishing safety performance according to claim 1, characterized in that, when the aerosol storage device fills the battery cell cavity with aerosol, it adopts a radiation spraying method so that each battery cell in the battery cell cavity is sprayed with aerosol.

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