Battery pack box body

Abstract

The utility model discloses a battery pack box body, and relates to the technical field of battery packs. The device specifically comprises a box body, the box body is provided with a first accommodating cavity which is provided with an upward opening and is used for accommodating a battery cell, the first accommodating cavity is covered with an upper cover plate used for sealing the first accommodating cavity, and the bottom of the first accommodating cavity is provided with a plurality of first diversion trenches which are arranged in parallel; the end part of the same side of each first diversion trench is communicated with a first via hole in the same side wall, and the anti-explosion valves of the battery cells in the first accommodating cavity face the first diversion trenches, so that high-temperature eruption substances are discharged through the diversion trenches when the battery cells are abnormally erupted. The utility model aims to realize safe and stable discharge of high-temperature eruption substances.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack box. Background Art

[0002] In the new energy revolution of the 21st century, electric vehicles have become a hot spot for the development of the global automotive industry with their environmentally friendly and low-carbon characteristics. With the continuous advancement of technology and the increasing demand of consumers, the market has put forward higher requirements on the performance of power batteries, the "heart" of electric vehicles. Among them, the energy density of power batteries is regarded as one of the key indicators to measure the performance of power batteries, because it directly affects the driving range and vehicle performance of electric vehicles.

[0003] Traditional power batteries use the MTP (Module to Pack) cell grouping technology, which is to assemble single cells into modules, and then integrate multiple modules into a battery pack. Although this method played an important role in the early development of electric vehicles, as energy density requirements continue to increase, MTP technology has been limited by its low assembly efficiency and large volume-to-weight ratio.

[0004] In order to overcome these limitations, CTP (Cell to Pack) technology came into being. This technology directly integrates the battery cell into the battery pack, eliminating the intermediate link of the module, thereby greatly improving the energy density of the battery pack. In addition, CTP technology also brings about improved production efficiency and reduced material costs. However, although CTP technology has outstanding performance in improving energy density and reducing costs, it faces challenges in terms of safety.

[0005] When the power battery is in an abnormal state such as overcharge, over discharge or mechanical shock, thermal runaway may occur, producing high-temperature eruption materials. In the existing CTP structure, these high-temperature materials diffuse into the battery pack through the channel of the plastic base at the bottom of the battery pack, and finally discharge out of the pack through the explosion-proof valve on the battery pack. However, in this process, the high-temperature materials may cause other insulating parts in the battery pack to fail, thereby causing serious safety problems such as electrical failure, arcing and even fire.

[0006] Therefore, how to achieve safe and stable discharge of high-temperature eruption materials has become a technical problem that needs to be solved urgently. Utility Model Content

[0007] The main purpose of the utility model is to provide a battery pack box, aiming to achieve safe and stable discharge of high-temperature erupted materials.

[0008] In order to achieve the above-mentioned purpose, the utility model provides a battery pack box, comprising:

[0009] A box body is provided with a first accommodating chamber with an opening upward for accommodating a battery cell, the first accommodating chamber is covered with an upper cover plate for sealing the first accommodating chamber, the bottom of the first accommodating chamber is provided with a plurality of first guide grooves arranged in parallel, the ends of the same side of each of the first guide grooves are connected to the first through holes on the same side wall, and the explosion-proof valves of the battery cells in the first accommodating chamber are all facing the first guide grooves, so that the battery cells can discharge high-temperature erupted materials through the guide grooves when they erupt abnormally.

[0010] In one embodiment of the present application, a first scored mica board for fire prevention and heat insulation is provided at the bottom of the first accommodating cavity.

[0011] In one embodiment of the present application, the box body is further provided with a second accommodating cavity with an opening downward for accommodating the battery cell, the upper cover of the second accommodating cavity is provided with a lower cover plate for sealing the second accommodating cavity, and the top of the first accommodating cavity is provided with a plurality of second guide grooves arranged in parallel, and the ends of the same side of each of the second guide grooves are connected to the second via holes on the same side wall.

[0012] In an embodiment of the present application, the first via hole and the second via hole are located in the same plane.

[0013] In one embodiment of the present application, the box body is further provided with an explosion-proof valve for sealing the first through hole and the second through hole.

[0014] In one embodiment of the present application, a second scored mica board for fire prevention and heat insulation is provided on the top of the second accommodating cavity.

[0015] In one embodiment of the present application, a water cooling plate is provided at the bottom of the first accommodating chamber and / or the top of the second accommodating chamber.

[0016] In one embodiment of the present application, a third accommodating cavity for accommodating a BMS and / or a BDU is further provided on one side of the box body, and the third accommodating upper cover is provided with a side cover plate for sealing the third accommodating cavity.

[0017] In one embodiment of the present application, the water inlet and the water outlet of the water cooling plate are both located in the third accommodating cavity.

[0018] In one embodiment of the present application, reinforcing ribs are provided on the outer side wall of the box body.

[0019] By adopting the above technical solution, multiple parallel first guide grooves effectively increase the guide path at the bottom of the box, ensuring that when the battery cell erupts abnormally, the high-temperature material can be quickly guided to the first via and discharged out of the box, avoiding the accumulation of high-temperature material inside the box, and reducing potential damage to other battery cells and insulating parts. The explosion-proof valve of the battery cell faces the guide groove, ensuring that when the battery works abnormally, the high-temperature material can be discharged through the guide groove as soon as possible. The safety of the battery pack is improved, and secondary disasters caused by the spread of high-temperature materials in the box, such as arcing or fire, are prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a schematic diagram of the explosion structure of the first embodiment of the utility model;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the box body of the utility model;

[0023] Figure 3 This is the front view of the box of the utility model;

[0024] 10. Box body; 11. First guide groove; 12. Reinforcing rib; 13. Explosion-proof valve; 14. Upper cover plate; 20. Battery cell; 30. Third accommodating chamber; 31. Side cover plate; 41. Lower cover plate; 51. First through hole; 52. Second through hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the utility model and do not constitute a limitation on the utility model.

[0026] In order to achieve the above-mentioned purpose, the utility model provides a battery pack box 10, comprising:

[0027] A box body 10 is provided with a first accommodating chamber with an opening upward for accommodating a battery cell 20, the first accommodating chamber is covered with an upper cover plate 14 for sealing the first accommodating chamber, a plurality of first guide grooves 11 arranged in parallel are provided at the bottom of the first accommodating chamber, the ends of the same side of each of the first guide grooves 11 are connected to the first through holes 51 on the same side wall, and the explosion-proof valves of the battery cells 20 in the first accommodating chamber are all facing the first guide grooves 11, so that the battery cells 20 can discharge high-temperature erupted materials through the guide grooves when they erupt abnormally.

[0028] Specifically, a first accommodating cavity is provided inside the box body 10, and the first accommodating cavity is used to place the battery cell 20. The upper cover plate 14 is used to seal the first accommodating cavity to prevent external substances from entering and prevent foreign objects in the battery cell 20 from splashing out. The upper cover plate 14 is fixedly connected to the top of the box body 10 by bolts or other fixing devices to ensure a tight seal. Its size and shape match the opening of the first accommodating cavity to achieve complete coverage and effective sealing.

[0029] A plurality of first guide grooves 11 arranged in parallel are provided at the bottom of the first accommodating chamber, and the first guide grooves 11 extend along the length direction of the accommodating chamber. The guide grooves are used to guide the high-temperature erupted materials generated by the battery cell 20 when an abnormal eruption occurs. The ends on the same side of each guide groove are respectively connected to the first through holes 51 on one side of the box body 10 to ensure that the erupted materials can be quickly discharged from the box body 10. The first through holes 51 are provided on the side walls of the box body 10 and are connected to each of the first guide grooves 11. In the first accommodating chamber, the explosion-proof valves of each battery cell 20 are all facing the first guide grooves 11 to ensure that the high-temperature erupted materials can be quickly and safely guided by the guide grooves to the first through holes 51, and finally discharged from the box body 10.

[0030] By adopting the above technical solution, multiple parallel first guide grooves 11 effectively increase the guide path at the bottom of the box 10, ensuring that when the battery cell 20 erupts abnormally, the high-temperature material can be quickly guided to the first via 51 and discharged outside the box 10, avoiding the accumulation of high-temperature material inside the box 10, and reducing potential damage to other battery cells 20 and insulating parts. The explosion-proof valve of the battery cell 20 faces the guide groove, ensuring that when the battery works abnormally, the high-temperature material can be discharged through the guide groove as soon as possible. The safety of the battery pack is improved, and secondary disasters caused by the diffusion of high-temperature materials in the box, such as arcing or fire, are prevented.

[0031] In one embodiment of the present application, a first scored mica board for fire prevention and heat insulation is provided at the bottom of the first accommodating cavity.

[0032] By adopting the above technical solution, the first notched mica board is an excellent heat-insulating material, which itself has extremely high temperature resistance and good electrical insulation properties. By arranging the first notched mica board at the bottom of the first accommodating cavity, it is possible to effectively prevent the high-temperature eruption material generated when the battery cell 20 is abnormally operated or fails from directly contacting other parts of the battery pack box 10, thereby avoiding the chain reaction caused by heat transfer and enhancing the fireproof and heat-insulating capabilities of the entire structure.

[0033] In one embodiment of the present application, the box body 10 is further provided with a second accommodating cavity with an opening downward for accommodating the battery cell 20, the second accommodating cavity is covered with a lower cover plate 41 for sealing the second accommodating cavity, and the top of the first accommodating cavity is provided with a plurality of second guide grooves arranged in parallel, and the ends of the same side of each of the second guide grooves are connected to the second through hole 52 on the same side wall.

[0034] Specifically, the second accommodating chamber is below the first accommodating chamber, thereby forming a double-layer structure. In order to seal the second accommodating chamber and protect the battery cell 20 therein, a lower cover plate 41 is installed at its opening. The lower cover plate 41 perfectly matches the opening of the second accommodating chamber and is firmly connected to the box body 10 by bolts, welding or other fixing methods, ensuring good sealing performance with the second accommodating chamber.

[0035] The top of the second accommodating chamber is also provided with a plurality of second guide grooves arranged in parallel. The second guide grooves guide the high-temperature substances released when the battery cell 20 in the second accommodating chamber fails. The guide grooves are arranged in parallel along the length direction of the box body 10. The ends of the same side of each second guide groove are connected to the second via 52 on the same side wall. The second via 52 ensures that the high-temperature substances guided out of the second guide grooves can be safely and efficiently discharged from the box body 10, thereby reducing the internal temperature and improving safety.

[0036] By adopting the above technical solution, by setting up both upward and downward accommodating chambers in the battery pack box 10, the space utilization efficiency is maximized, and at the same time, it helps to optimize the center of gravity layout of the entire battery pack and improve the driving stability of the electric vehicle. The double-layer design of the first accommodating chamber and the second accommodating chamber increases the battery capacity of the battery pack.

[0037] In an embodiment of the present application, the first via hole 51 and the second via hole 52 are located in the same plane.

[0038] With the above technical solution, since the first via 51 and the second via 52 are in the same plane, the two types of vias can be manufactured at one time through the same processing steps. This method simplifies the production process, helps to reduce production costs and improve manufacturing efficiency. At the same time, this layout makes the side wall structure of the battery pack more consistent, helps to improve the overall strength and stability of the side wall, thereby providing better protection for the components inside the battery pack.

[0039] In an embodiment of the present application, the box body 10 is further provided with an explosion-proof valve 13 for sealing the first through hole 51 and the second through hole 52 .

[0040] With the above technical solution, the explosion-proof valve 13 remains sealed under normal working conditions, which helps to maintain the sealing of the box body 10. It can protect the internal battery from the external environment such as moisture and dust, and ensure that the internal gas is discharged smoothly in an emergency.

[0041] In one embodiment of the present application, a second scored mica board for fire prevention and heat insulation is provided on the top of the second accommodating cavity.

[0042] By adopting the above technical solution, the second notched mica board is an excellent heat-insulating material, which itself has extremely high temperature resistance and good electrical insulation properties. By arranging the second notched mica board on the top of the second accommodating cavity, it is possible to effectively prevent the high-temperature eruption material generated when the battery cell 20 is abnormally operated or fails from directly contacting other parts of the battery pack box 10, thereby avoiding the chain reaction caused by heat transfer and enhancing the fireproof and heat-insulating capabilities of the entire structure.

[0043] In one embodiment of the present application, a water cooling plate is provided at the bottom of the first accommodating chamber and / or the top of the second accommodating chamber.

[0044] With the above technical solution, the water-cooled plate uses the coolant flowing through it to absorb and transfer heat, thereby effectively controlling the temperature of the battery cells. This helps prevent the battery from overheating, especially under high-load working conditions, and can significantly improve the working efficiency and stability of the battery.

[0045] In an embodiment of the present application, a third accommodating cavity 30 for accommodating a BMS and / or a BDU is further provided on one side of the box body 10 , and the third accommodating upper cover is provided with a side cover plate 31 for sealing the third accommodating cavity 30 .

[0046] By adopting the above technical solution, placing the BMS and BDU in the dedicated third accommodation chamber 30 can ensure the centralized management of these sensitive and important electronic components, which is convenient for maintenance and inspection. At the same time, the sealed side cover 31 provides a physical isolation for the electronic equipment, protecting them from environmental factors such as moisture and dust, thereby improving the safety of the BMS and BDU.

[0047] In one embodiment of the present application, the water inlet and the water outlet of the water cooling plate are both located in the third accommodating cavity 30 .

[0048] By adopting the above technical solution, the water inlet and the water outlet are centrally placed in the third accommodating chamber 30, which can greatly reduce external connecting pipes and simplify the design and installation process of the cooling system, which not only helps to improve the reliability of the system, but also reduces labor and installation costs.

[0049] In one embodiment of the present application, a reinforcing rib 12 is provided on the outer side wall of the box body 10 .

[0050] By adopting the above technical solution, the reinforcing ribs 12 can significantly improve the structural strength and rigidity of the box 10, so that it can withstand greater external forces without deformation, which helps to protect the components in the box 10 from damage.

[0051] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery pack box, characterized in that: include: A box body is provided with a first accommodating chamber with an opening upward for accommodating a battery cell, the first accommodating chamber is covered with an upper cover plate for sealing the first accommodating chamber, the bottom of the first accommodating chamber is provided with a plurality of first guide grooves arranged in parallel, the ends of the same side of each of the first guide grooves are connected to the first through holes on the same side wall, and the explosion-proof valves of the battery cells in the first accommodating chamber are all facing the first guide grooves, so that the battery cells can discharge high-temperature erupted materials through the guide grooves when they erupt abnormally.

2. The battery pack box according to claim 1, characterized in that: A first scored mica board for fire prevention and heat insulation is provided at the bottom of the first accommodating cavity.

3. The battery pack box according to claim 1 or 2, characterized in that: The box body is also provided with a second accommodating cavity with an opening downward for accommodating the battery cell, the upper cover of the second accommodating cavity is provided with a lower cover plate for sealing the second accommodating cavity, and the top of the first accommodating cavity is provided with a plurality of second guide grooves arranged in parallel, and the ends of the same side of each of the second guide grooves are connected to the second via holes on the same side wall.

4. The battery pack box according to claim 3, characterized in that: The first via hole and the second via hole are located in the same plane.

5. The battery pack case according to claim 4, characterized in that: The box body is also provided with an explosion-proof valve for sealing the first through hole and the second through hole.

6. The battery pack case according to claim 3, characterized in that: A second scored mica board for fire prevention and heat insulation is provided on the top of the second accommodating cavity.

7. The battery pack box according to claim 3, characterized in that: A water cooling plate is provided at the bottom of the first accommodating chamber and / or at the top of the second accommodating chamber.

8. The battery pack box according to claim 7, characterized in that: A third accommodating cavity for accommodating a BMS and / or a BDU is further provided on one side of the box body, and the third accommodating upper cover is provided with a side cover plate for sealing the third accommodating cavity.

9. The battery pack case according to claim 8, characterized in that: The water inlet and the water outlet of the water cooling plate are both located in the third accommodating cavity.

10. The battery pack case according to claim 1, characterized in that: The outer side wall of the box body is provided with reinforcing ribs.

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