Partitioned isolated fireproof battery box

Abstract

The application relates to the field of new energy automobile battery technology, and discloses a partition isolation type flame-retardant battery box, which comprises a box body and an upper cover. A plurality of battery cavities arranged in a rectangular array are arranged in the box body. Ceramic silicon rubber flame-retardant plates are fixedly connected to the inner walls of the battery cavities. A plurality of through grooves are fixedly connected to the bottom ends of the battery cavities. A collecting plate is fixedly connected to the bottom end of the box body. The bottom end of the collecting plate is fixedly connected with a liquid outlet pipe. A plurality of first mounting blocks arranged in a rectangular array are fixedly connected to the outer wall of the upper cover. The ceramic silicon rubber flame-retardant plates arranged on the inner walls of the battery cavities can prevent the spread of fire and heat to adjacent battery cavities, and reduce the risk of fire and explosion of the whole battery box. The through grooves at the bottom ends of the battery cavities, the collecting plate at the bottom end of the box body and the liquid outlet pipe can collect electrolyte, preventing the accumulation of liquid in the battery box from corroding the battery pack and other components.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle battery technology, specifically a partitioned, flame-retardant battery box. Background Technology

[0002] With the increase in energy density of lithium-ion batteries, the risk of thermal runaway has increased significantly. Since 2020, most of the electric vehicle fires reported globally have been caused by battery short circuits. Currently, the industry mainly monitors voltage and temperature parameters in real time through battery management systems or uses integrated fireproof coatings to slow the spread of fire.

[0003] However, existing battery boxes, when a single-point short circuit occurs, cannot prevent further chain reactions of thermal runaway. They cannot avoid the chain thermal runaway problem caused by a single-point short circuit, and cannot prevent the spread of thermal runaway, which can lead to overall burnout and increased losses. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a partitioned, isolated, flame-retardant battery box, which has advantages such as reducing the risk of cascading thermal runaway caused by a single-point short circuit. It solves the problem that existing battery boxes, when a single-point short circuit occurs, are unable to prevent further cascading thermal runaway reactions, cannot avoid the cascading thermal runaway caused by a single-point short circuit, and cannot prevent the spread of thermal runaway, thus leading to overall burnout and increased losses.

[0005] To achieve the above objectives, this application provides the following technical solution: a partitioned flame-retardant battery box, comprising a box body and a top cover, wherein the box body has multiple battery cavities arranged in a rectangular array inside, the inner walls of the multiple battery cavities are fixedly connected with ceramicized silicone rubber flame-retardant plates, the bottom ends of the multiple battery cavities are fixedly connected with through grooves, the bottom end of the box body is fixedly connected with a collection plate, the bottom end of the collection plate is fixedly connected with a liquid outlet pipe, the end of the liquid outlet pipe away from the collection plate is fixedly connected with a quick-release flange, the quick-release flange is fixedly connected with a sealing cap inside, and the outer wall of the top cover is fixedly connected with multiple first mounting blocks arranged in a rectangular array.

[0006] Through the above design, multiple battery chambers arranged in a rectangular array inside the casing allow for the neat and orderly installation and fixation of the battery pack. The inner walls of multiple battery chambers are lined with ceramicized silicone rubber flame-retardant plates. These plates possess high flame-retardant properties and can quickly form a fire barrier in the event of thermal runaway, confining the abnormal situation of a single battery to a specific chamber and preventing the spread of fire and heat to adjacent chambers. This reduces the risk of fire and explosion of the entire battery box, providing reliable safety protection for the battery pack. The through-channels at the bottom of the battery chambers, along with the collection plate and outlet pipe at the bottom of the casing, facilitate electrolyte collection. When a battery leaks, the leaked liquid flows smoothly through the through-channels into the collection plate and then out of the battery box through the outlet pipe, preventing liquid accumulation inside the battery box from corroding the battery pack and other components. The quick-release flange and sealing cap design allows for quick and convenient opening of the outlet pipe for cleaning or leak inspection.

[0007] Furthermore, a plurality of pressure-holding blocks arranged in a linear array are fixedly connected to the bottom end of the upper cover, and a plurality of pressure relief valves arranged in a rectangular array are fixedly connected inside the upper cover, with all of the pressure relief valves penetrating through the pressure-holding blocks.

[0008] With the above solution, multiple pressure-holding blocks arranged in a linear array at the bottom of the top cover are used to fix the battery and prevent it from shaking during movement. Multiple pressure relief valves arranged in a rectangular array pass through the pressure-holding blocks, so that each battery cavity has an independent pressure relief channel. When the battery pack in a certain battery cavity generates high-pressure gas due to thermal runaway or other reasons, the high-pressure gas can be directly discharged quickly through the corresponding pressure relief valve without being affected by adjacent battery cavities. This improves the timeliness and effectiveness of pressure relief, can quickly reduce the pressure inside the battery cavity, and prevent the battery box from exploding due to excessive internal pressure.

[0009] Furthermore, each of the first mounting blocks is slidably connected with a fixing bolt, and the upper end of the outer wall of the box is fixedly connected with a plurality of second mounting blocks arranged in a rectangular array.

[0010] With the above scheme, the fixing bolts are used to connect the box body and the top cover through the first fixing block and the second fixing block.

[0011] Furthermore, one end of each of the aforementioned fixing bolts, which passes through the first mounting block, is threaded inside the second mounting block.

[0012] With the above solution, the fixing bolt is slidably connected in the first mounting block. When installing the top cover, the first mounting block is aligned with the second mounting block. Then, the fixing bolt is rotated to enter the threaded hole of the second mounting block and tightened to complete the installation. Disassembly is equally convenient. Simply loosen the fixing bolt and slide it out to separate the top cover and the box. This simplifies the installation and disassembly process and improves maintenance and repair efficiency.

[0013] Furthermore, each of the multiple battery cavities is fixedly equipped with a lithium battery pack.

[0014] With the above scheme, each battery compartment is equipped with an independent lithium battery pack, providing a relatively independent space for the lithium battery pack. If the lithium battery pack in a certain battery compartment is damaged, it can be easily removed from the battery compartment and replaced with a new lithium battery pack.

[0015] Furthermore, the plurality of the holding blocks are slidably disposed inside the battery cavity, and the bottom ends of the plurality of the holding blocks are in contact with the upper end of the lithium battery pack.

[0016] With the above solution, the pressure block is slidably set inside the battery cavity, so that its bottom end is in close contact with the top end of the lithium battery pack. This ensures that the lithium battery pack will not shake or shift inside the battery cavity. During vehicle operation, even if encountering complex road conditions such as bumps and vibrations, the lithium battery pack can remain stable, avoiding problems such as loosening or damage of internal connections caused by movement, and ensuring the normal operation of the battery pack.

[0017] Furthermore, each of the aforementioned pressure relief valves corresponds to a battery cavity.

[0018] With the above solution, when a large amount of high-pressure gas is generated in a lithium battery pack in a battery chamber due to thermal runaway, overcharging, short circuit, etc., the high-pressure gas can be discharged through the corresponding pressure relief valve, and an explosion will occur due to excessive pressure.

[0019] Furthermore, multiple ceramicized silicone rubber flame-retardant plates are fixedly disposed between the lithium battery pack and the battery cavity.

[0020] Through the above scheme, the ceramicized silicone rubber flame retardant board has excellent flame retardant properties. When exposed to high temperature or open flame, it will gradually ceramicize at a certain temperature, forming a hard ceramic-like protective layer that can prevent flames and heat from spreading to adjacent battery chambers.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This type of partitioned flame-retardant battery box features multiple battery chambers arranged in a rectangular array inside the box, allowing for neat and orderly installation and fixation of the battery pack. The inner walls of each battery chamber are lined with ceramicized silicone rubber flame-retardant plates. These plates possess high flame-retardant properties and, in the event of thermal runaway, quickly form a fire barrier, confining the abnormal situation of a single battery to a specific chamber and preventing the spread of fire and heat to adjacent chambers. This reduces the risk of fire and explosion of the entire battery box, providing reliable safety protection for the battery pack. The through-channels at the bottom of the battery chambers, along with the collection plate and outlet pipe at the bottom of the box, facilitate electrolyte collection. When a battery leaks, the leaked liquid flows smoothly through the through-channels into the collection plate and then out of the battery box through the outlet pipe, preventing liquid accumulation inside the battery box from corroding the battery pack and other components. The quick-release flange and sealing cap design allows for quick and convenient opening of the outlet pipe for cleaning or leak inspection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the internal structure of the box in this application.

[0025] Figure 3 This is a schematic diagram of the electrolyte discharge structure of this application.

[0026] Figure 4 This is a schematic diagram of the upper cover structure of this application;

[0027] Figure 5 This is a schematic diagram of the overall installation structure of the structure in this application.

[0028] In the picture:

[0029] 1. Housing; 2. Battery cavity; 3. Ceramicized silicone rubber flame-retardant plate; 4. Through groove; 5. Collection plate; 6. Liquid outlet pipe; 7. Quick-release flange; 8. Sealing cover; 9. Top cover; 10. First mounting block; 11. Fixing bolt; 12. Pressure holding block; 13. Pressure relief valve; 14. Second mounting block; 15. Lithium battery pack. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] Please see Figure 1 , Figure 2 and Figure 3 This embodiment of a partitioned flame-retardant battery box includes a box body 1 and a top cover 9. The box body 1 has multiple battery chambers 2 arranged in a rectangular array inside. This arrangement of battery chambers 2 allows for the neat and orderly installation and fixation of the battery pack. Each battery chamber 2 has a ceramicized silicone rubber flame-retardant plate 3 fixedly connected to its inner wall. The ceramicized silicone rubber flame-retardant plate 3 has high flame-retardant performance; in the event of thermal runaway, it can quickly form a fire barrier, confining the abnormal situation of a single battery to a specific battery chamber 2, preventing the fire and heat from spreading to adjacent battery chambers 2, reducing the risk of fire and explosion of the entire battery box, and providing protection for the battery pack. For reliable safety protection, multiple battery chambers 2 are fixedly connected to the bottom of the through grooves 4, the bottom of the box body 1 is fixedly connected to the collection plate 5, the bottom of the collection plate 5 is fixedly connected to the liquid outlet pipe 6, the end of the liquid outlet pipe 6 away from the collection plate 5 is fixedly connected to the quick-release flange 7, and the inside of the quick-release flange 7 is fixedly connected to the sealing cover 8. When the battery leaks, the leaked liquid can flow smoothly into the collection plate 5 through the through grooves 4, and then be discharged from the battery box through the liquid outlet pipe 6, preventing the liquid from accumulating in the battery box and causing corrosion to the battery pack and other components. The design of the quick-release flange 7 and the sealing cover 8 allows the liquid outlet pipe 6 to be opened quickly and conveniently when cleaning or checking for leaks is required. Multiple first mounting blocks 10 arranged in a rectangular array are fixedly connected to the outer wall of the top cover 9.

[0032] Please see Figure 1 , Figure 2 and Figure 4The bottom of the upper cover 9 is fixedly connected to multiple pressure-holding blocks 12 arranged in a linear array. Inside the upper cover 9, multiple pressure-relief valves 13 arranged in a rectangular array are fixedly connected, each passing through one of the pressure-holding blocks 12. These pressure-holding blocks 12 are used to secure the battery and prevent it from shaking during movement. The rectangular array of pressure-relief valves 13 passing through the pressure-holding blocks 12 ensures that each battery chamber 2 has an independent pressure relief channel. When high-pressure gas is generated in a battery chamber 2 due to thermal runaway or other reasons, the high-pressure gas can be quickly discharged directly through the corresponding pressure-relief valve 13 without being affected by adjacent battery chambers 2. This improves the timeliness and effectiveness of pressure relief, rapidly reducing the pressure inside the battery chamber 2 and preventing the battery pack from collapsing due to internal pressure issues. In case of excessive height leading to explosion, multiple first mounting blocks 10 are slidably connected with fixing bolts 11 inside. Multiple second mounting blocks 14 arranged in a rectangular array are fixedly connected to the upper end of the outer wall of the housing 1. The fixing bolts 11 are used to connect the housing 1 and the top cover 9 through the first fixing blocks and the second fixing blocks. The ends of the multiple fixing bolts 11 that pass through the first mounting blocks 10 are threaded inside the second mounting blocks 14. The fixing bolts 11 are slidably connected inside the first mounting blocks 10. When installing the top cover 9, the first mounting blocks 10 are aligned with the second mounting blocks 14. Then, the fixing bolts 11 are rotated to enter the threaded holes of the second mounting blocks 14 and tightened to complete the installation. Disassembly is equally convenient. Simply loosen the fixing bolts 11 and slide them out to separate the top cover 9 from the housing 1. This simplifies the installation and disassembly process and improves maintenance and repair efficiency.

[0033] Please see Figure 1 , Figure 4 and Figure 5Multiple battery chambers 2 each contain a fixed lithium battery pack 15, providing a relatively independent space for each pack. If a lithium battery pack 15 in a particular chamber 2 is damaged, it can be easily removed and replaced with a new one. Multiple holding blocks 12 are slidably disposed inside the battery chambers 2, with their bottom ends contacting the top ends of the lithium battery packs 15. This ensures that the lithium battery packs 15 do not shake or shift within the chambers. Even when encountering bumpy or vibrating road conditions during vehicle operation, the lithium battery packs can withstand these conditions. The battery pack 15 can also remain stable, avoiding problems such as loosening or damage of internal connections due to movement, and ensuring the normal operation of the battery pack. Multiple pressure relief valves 13 are corresponding to the battery chamber 2. When a large amount of high-pressure gas is generated in a lithium battery pack 15 in a certain battery chamber 2 due to thermal runaway, overcharging, short circuit, etc., the high-pressure gas can be discharged through the corresponding pressure relief valve 13. An explosion may occur due to excessive pressure. Multiple ceramicized silicone rubber flame retardant plates 3 are fixedly installed between the lithium battery pack 15 and the battery chamber 2. The ceramicized silicone rubber flame retardant plates 3 have excellent flame retardant properties. When exposed to high temperature or open flame, they will gradually ceramicize at a certain temperature, forming a hard ceramic-like protective layer that can prevent flames and heat from spreading to adjacent battery chambers 2.

[0034] In this embodiment, the partitioned flame-retardant battery box has multiple battery chambers 2 arranged in a rectangular array inside the box body 1, allowing the battery pack to be installed and fixed neatly and orderly. The inner walls of multiple battery chambers 2 are provided with ceramicized silicone rubber flame-retardant plates 3. The ceramicized silicone rubber flame-retardant plates 3 have high flame-retardant performance. When the battery experiences thermal runaway, the flame-retardant plates can quickly form a fire barrier, confining the abnormal situation of a single battery to a specific battery chamber 2, preventing the fire and heat from spreading to adjacent battery chambers 2, reducing the risk of fire and explosion of the entire battery box, and providing reliable safety protection for the battery pack. The through groove 4 at the bottom of the battery chamber 2, together with the collection plate 5 and the liquid outlet pipe 6 at the bottom of the box body 1, realizes the collection of electrolyte. When the battery leaks, the leaked liquid can flow smoothly into the collection plate 5 through the through groove 4, and then be discharged from the battery box through the liquid outlet pipe 6, preventing the liquid from accumulating in the battery box and causing corrosion to the battery pack and other components. The design of the quick-release flange 7 and the sealing cover 8 allows for quick and convenient opening of the liquid outlet pipe 6 when cleaning or checking for leaks is required.

[0035] The working principle of the above embodiments is as follows:

[0036] The enclosure 1 contains multiple independently separated battery chambers 2. Each battery chamber 2 has a ceramicized silicone rubber flame-retardant plate 3 installed on its inner wall. When a single battery experiences thermal runaway, the ceramicized silicone rubber flame-retardant plate 3 will rapidly ceramicize upon exposure to high temperatures, forming a dense fire barrier that effectively prevents the spread of flames and heat to adjacent battery chambers 2, thus controlling the fault within a single chamber. Each battery chamber 2 has a through groove 4 at its bottom that connects to a collection plate 5, allowing leaked electrolyte to be quickly discharged from the enclosure 1, preventing the accumulation of corrosive liquid. The leaked electrolyte can flow along the through groove 4 into the collection plate 5 and be discharged centrally through the outlet pipe 6 of the quick-release flange 7 structure. Each battery chamber 2 is equipped with an independent pressure relief valve 13 to ensure that the high-pressure gas generated by thermal runaway can be discharged quickly and in a directional manner, avoiding the risk of explosion due to pressure accumulation. The design of the pressure holding block 12, which is in close contact with the battery pack, along with the fixing bolts 11, is used to fix the battery pack, ensuring the stability of the battery pack in a vibration environment.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A partitioned flame-retardant battery box, comprising a box body (1) and a top cover (9), characterized in that: The housing (1) has multiple battery chambers (2) arranged in a rectangular array inside. Each battery chamber (2) has a ceramicized silicone rubber flame-retardant plate (3) fixedly connected to its inner wall. Each battery chamber (2) has a through groove (4) fixedly connected to its bottom end. The housing (1) has a collection plate (5) fixedly connected to its bottom end. The collection plate (5) has a liquid outlet pipe (6) fixedly connected to its bottom end. The end of the liquid outlet pipe (6) away from the collection plate (5) is fixedly connected to a quick-release flange (7). The quick-release flange (7) has a sealing cover (8) fixedly connected inside. The top cover (9) has multiple first mounting blocks (10) arranged in a rectangular array fixedly connected to its outer wall.

2. The partitioned flame-retardant battery box according to claim 1, characterized in that: The bottom end of the upper cover (9) is fixedly connected to a plurality of pressure holding blocks (12) arranged in a linear array, and the upper cover (9) is fixedly connected to a plurality of pressure relief valves (13) arranged in a rectangular array. The plurality of pressure relief valves (13) are all arranged through the pressure holding blocks (12).

3. The partitioned flame-retardant battery box according to claim 1, characterized in that: Each of the first mounting blocks (10) is slidably connected with a fixing bolt (11), and the upper end of the outer wall of the box (1) is fixedly connected with a plurality of second mounting blocks (14) arranged in a rectangular array.

4. A partitioned, flame-retardant battery box according to claim 3, characterized in that: The multiple fixing bolts (11) are threaded into the second mounting block (14) at one end of the first mounting block (10).

5. A partitioned flame-retardant battery box according to claim 1, characterized in that: Each of the battery cavities (2) is fixedly equipped with a lithium battery pack (15).

6. A partitioned flame-retardant battery box according to claim 2, characterized in that: Multiple pressure blocks (12) are slidably disposed inside the battery cavity (2), and the bottom ends of multiple pressure blocks (12) are in contact with the upper end of the lithium battery pack (15).

7. A partitioned flame-retardant battery box according to claim 2, characterized in that: Each of the aforementioned pressure relief valves (13) corresponds to the battery chamber (2).

8. A partitioned flame-retardant battery box according to claim 1, characterized in that: Multiple ceramicized silicone rubber flame-retardant plates (3) are fixedly disposed between the lithium battery pack (15) and the battery cavity (2).

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