CTB battery box and electric equipment

Abstract

The invention provides a CTB battery box and electric equipment. The CTB battery box comprises a box body, the box body comprises a box cover and a lower box body, the lower box body comprises a plurality of frames, the frames are of hollow structures, and the lower box body and the box cover are mutually closed to form a containing cavity; the battery module is mounted in the accommodating cavity, the battery module comprises a plurality of battery cells, the battery cells are provided with battery anti-explosion valves, and the battery anti-explosion valves are positioned on the top sides of the battery cells; the guide assembly is arranged on the lower box body and located on the battery module, and the guide assembly is of a hollow structure and is used for communicating the frame with the battery anti-explosion valve; and the first anti-explosion valve is arranged on the frame, and the first anti-explosion valve is communicated with the frame. Directional exhaust can be realized after the battery cell is out of control, and the exhaust efficiency is improved.

Description

Technical Field

[0001] This application relates to a CTB battery box and electrical equipment, belonging to the field of new energy battery technology. Background Technology

[0002] With the rapid development of electric vehicles, energy storage systems and other fields, batteries, as core components, are of paramount importance in terms of safety and reliability.

[0003] In conceiving and implementing this application, the applicant discovered at least the following problems: Cell to Body (CTB) technology is an important direction in the development of power battery technology, offering advantages such as high energy density and low cost compared to traditional cell to module (CTM) and then to the entire battery pack assembly technology. However, in CTB battery packs, the battery pack cover directly serves as the floor of the passenger compartment, which poses a higher safety threat to occupants should the battery pack experience thermal runaway.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] This application provides a CTB battery box and electrical equipment that can achieve directional venting after the battery cell fails, thereby improving venting efficiency.

[0006] This application provides a CTB battery box, including:

[0007] The box body includes a lid and a lower box body. The lower box body includes multiple frames, which are hollow structures. The lower box body and the lid fit together to form a receiving cavity.

[0008] A battery module is installed in a receiving cavity. The battery module includes multiple battery cells, each of which has a battery explosion-proof valve located on the top side of the battery cell.

[0009] The guide assembly is located in the lower housing and on the battery module. The guide assembly has a hollow structure and is used to connect the frame and the battery explosion-proof valve.

[0010] The first explosion-proof valve is located on the frame and is connected to the frame.

[0011] The beneficial effects of this application are: through the design of the guide component and the first explosion-proof valve, the effect of directional exhaust can be achieved. When a cell goes out of control, it can be discharged to the outside of the CTB battery box through the shortest path, thereby improving the exhaust efficiency. In addition, while the guide component can discharge high-temperature gas, it can also be used to support the box cover. The pressure on the box cover is directly transferred to the lower box body through the guide component, avoiding the risk that the pressure of the box cover will be transferred to the terminal post and cause the cell to fail.

[0012] In some alternative implementations, the CTB battery box also includes a second explosion-proof valve, which is located on the frame and communicates with the receiving cavity.

[0013] It should be noted that the first explosion-proof valve, as the main exhaust valve, can release high-temperature gas into the CTB battery box when there is leakage in the channel of the guide assembly or when it cannot handle the exhaust flow. The gas is then discharged through the second explosion-proof valve, which improves the safety of the CTB battery box.

[0014] In some alternative implementations, the CTB battery box also includes a buffer disposed between the guide assembly and the box cover.

[0015] It should be noted that the use of buffer components further enhances the stability of the connection between the guide assembly and the box cover, preventing direct contact between the guide assembly and the box cover, reducing wear and physical damage, and extending the service life of the components.

[0016] In some alternative implementations, the multiple frames include first side beams and second side beams, each of which is at least two, and at least two first side beams and at least two second side beams are connected together.

[0017] The guide component is located at both ends on at least two second side frame beams.

[0018] It should be noted that, through the connection of at least two first frame beams and at least two second frame beams, the frame structure may have higher stability and strength, and the overall structural strength and stability are enhanced, enabling it to better resist external impacts and vibrations.

[0019] In some alternative embodiments, the lower housing also includes a crossbeam, with both ends of the crossbeam respectively disposed on at least two first side frame beams, so as to divide the receiving cavity into at least two cavities;

[0020] There are at least two battery modules, and the at least two battery modules are located in at least two different cavities;

[0021] The crossbeam is a hollow structure and is connected to the first frame beam. The middle part of the guide assembly is connected to the crossbeam.

[0022] It should be noted that the introduction of the crossbeams provides additional support and rigidity to the lower box girder. By fixing both ends of the crossbeams to at least two first frame beams, the strength and stability of the entire structure are improved, enabling it to better withstand mechanical stress and vibration.

[0023] In some alternative embodiments, the guide assembly includes a guide housing and a first rotating member, the guide housing being disposed on the second side frame beam, the guide housing having a plurality of guide holes facing the battery explosion-proof valve;

[0024] The first rotating component is rotatably disposed within the guide housing and movably covers the guide hole.

[0025] It should be noted that the guide housing has multiple guide holes facing the battery explosion-proof valve. When the battery explosion-proof valve is activated, the gas can push the first rotating component to rotate, causing the first rotating component to open and thus exposing the guide holes. The gas can then be quickly discharged through the guide holes, thereby controlling the direction and flow of gas discharge, which helps to achieve more precise exhaust control and improve the safety of the system.

[0026] In some alternative embodiments, the guide housing includes a first guide portion, a second guide portion, and a third guide portion that are in communication with each other;

[0027] The third guide section is located on the crossbeam. Along the extension direction of the guide assembly, the first guide section and the second guide section are located on opposite sides of the third guide section, and both are located on the second side frame beam.

[0028] It should be noted that the guide housing consists of a first guide section, a second guide section, and a third guide section, and these components are interconnected, allowing gas to exit through multiple paths, thereby improving exhaust efficiency and system response speed. In the event of a battery runaway, it can rapidly reduce internal pressure and temperature.

[0029] In some alternative implementations, there are multiple first rotating members;

[0030] Along the extending direction of the guide housing, the rotation direction of a plurality of first rotating members located on one side of the guide housing is opposite to the rotation direction of a plurality of first rotating members located on the other side of the guide housing.

[0031] It should be noted that by arranging multiple first rotating components on both sides of the guide housing and having them rotate in opposite directions, the gas flow path can be controlled more precisely. This design allows for flexible adjustment of the airflow direction under different conditions, thereby optimizing exhaust efficiency.

[0032] In some alternative implementations, the guide assembly further includes a second rotating member and a third rotating member;

[0033] The second rotating member is rotatably disposed on the side of the first guide portion facing the third guide portion, and the second rotating member has an open position and a closed position;

[0034] When the second rotating member rotates to the open position, the first guide part and the third guide part are connected to allow the gas in the first guide part to flow to the third guide part. When the second rotating member rotates to the closed position, the connection between the first guide part and the third guide part is blocked.

[0035] The third rotating member is rotatably disposed on the side of the second guide portion facing the third guide portion, and the third rotating member has an open position and a closed position;

[0036] When the third rotating member rotates to the open position, the second guide section and the third guide section are connected to allow gas in the second guide section to flow to the third guide section. When the third rotating member rotates to the closed position, the connection between the second guide section and the third guide section is blocked.

[0037] It should be noted that the introduction of the second and third rotating components allows the system to flexibly control the gas flow path as needed. By setting the second and third rotating components to open or closed positions, the airflow between the first guide section, the second guide section, and the third guide section can be selectively connected or blocked. This flexibility allows for optimization of the gas emission path under different operating conditions.

[0038] In addition, this application also provides an electrical device including the aforementioned CTB battery box.

[0039] The CTB battery box and electrical equipment provided in this application include a CTB battery box; the CTB battery box includes a box body, the box body includes a box cover and a lower box body, the lower box body includes multiple frames, the frames are hollow structures, the lower box body and the box cover are closed to form a receiving cavity; a battery module is installed in the receiving cavity, the battery module includes multiple battery cells, the battery cells have a battery explosion-proof valve, the battery explosion-proof valve is located on the top side of the battery cell; a guide assembly is located in the lower box body and on the battery module, the guide assembly is hollow structure and is used to connect the frame and the battery explosion-proof valve; a first explosion-proof valve is located in the frame and is connected to the frame.

[0040] The design of the guide assembly and the first explosion-proof valve enables directional venting. When a cell malfunctions, it can be vented to the outside of the CTB battery box via the shortest path, improving venting efficiency. In addition, while venting high-temperature gas, the guide assembly can also support the box cover, directly transferring the pressure on the box cover to the lower box body, thus avoiding the risk of the pressure on the box cover being transferred to the terminal post and causing cell failure. Attached Figure Description

[0041] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0042] Figure 1 This is a schematic diagram of the CTB battery box according to an embodiment of this application;

[0043] Figure 2 This is an exploded view of the CTB battery box according to an embodiment of this application;

[0044] Figure 3 This is a partial structural schematic diagram of the CTB battery box from a first-view perspective, according to an embodiment of this application.

[0045] Figure 4 This is a schematic diagram of the structure of the battery cell in the CTB battery box according to an embodiment of this application;

[0046] Figure 5 This is a schematic diagram of the assembly of the second explosion-proof valve in the CTB battery box according to an embodiment of this application;

[0047] Figure 6 This is an assembly cross-sectional view of the first and second side frame beams in the CTB battery box according to an embodiment of this application.

[0048] Figure 7 This is a schematic diagram of the structure of the first frame beam in the CTB battery box according to an embodiment of this application;

[0049] Figure 8 This is a schematic diagram of the structure of the second frame beam in the CTB battery box according to an embodiment of this application;

[0050] Figure 9 This is an assembly cross-sectional view of the first side beam and crossbeam in the CTB battery box according to an embodiment of this application;

[0051] Figure 10 This is a top view of the CTB battery box according to an embodiment of this application;

[0052] Figure 11 for Figure 10 A cross-sectional view along the AA direction;

[0053] Figure 12 for Figure 11 A magnified view of a section at point I;

[0054] Figure 13 This is a partial structural schematic diagram of the CTB battery box from a second perspective according to an embodiment of this application;

[0055] Figure 14 This is a schematic diagram of the guide assembly in the CTB battery box according to an embodiment of this application;

[0056] Figure 15 This is an exploded view of the guide assembly in the CTB battery box according to an embodiment of this application;

[0057] Figure 16 This is a schematic diagram of the bottom support structure of the CTB battery box according to an embodiment of this application;

[0058] Figure 17 for Figure 16 Enlarged view of section II in the middle;

[0059] Figure 18 This is a schematic diagram of the cell exhaust principle at point A in the CTB battery box from a second perspective according to an embodiment of this application.

[0060] Figure 19 This is a schematic diagram of the cell exhaust principle at point A in the CTB battery box from a third-view perspective, according to an embodiment of this application.

[0061] Figure 20 This is a schematic diagram of the cell exhaust principle at point B in the CTB battery box from a second perspective in an embodiment of this application.

[0062] Figure 21 This is a schematic diagram of the cell exhaust principle at point B in the CTB battery box from a third-view perspective, according to an embodiment of this application.

[0063] Figure label:

[0064] 100-CTB battery box;

[0065] 110 - Enclosure;

[0066] 1101 - Receiving cavity;

[0067] 111 - Box lid;

[0068] 112-lower box;

[0069] 1121 - First border beam;

[0070] 1122 - Second border beam;

[0071] 1123 - Crossbeam;

[0072] 120-Battery Module;

[0073] 121-cell;

[0074] 1211-Battery explosion-proof valve;

[0075] 1212-Pole Column;

[0076] 122-Separator;

[0077] 130 - Guide assembly;

[0078] 131 - First rotating component;

[0079] 132 - Second rotating component;

[0080] 133 - Guide housing;

[0081] 1331 - First guide section;

[0082] 1332 - Second guide section;

[0083] 1333 - Third Guiding Section;

[0084] 134 - Shaft;

[0085] 135 - Base support;

[0086] 136 - Top cover plate;

[0087] 1334 - Guide hole;

[0088] 140 - First explosion-proof valve;

[0089] 150 - Second explosion-proof valve;

[0090] 160-Buffer. Detailed Implementation

[0091] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0092] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0093] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0095] In conceiving and implementing this application, the applicant discovered at least the following problems: Cell to Body (CTB) technology is an important direction in the development of power battery technology, offering advantages such as high energy density and low cost compared to traditional cell to module (CTM) and then to the entire battery pack assembly technology. However, in CTB battery packs, the battery pack cover directly serves as the floor of the passenger compartment, which poses a higher safety threat to occupants should the battery pack experience thermal runaway.

[0096] Furthermore, regarding the issue of thermal runaway, the risk is usually mitigated by designing venting channels. When a cell experiences thermal runaway, the high-temperature gas in the venting channel will affect other cells through the weak points corresponding to the explosion-proof valves. In other words, when a cell goes out of control, it will affect the position of the explosion-proof valves of other cells through the venting holes.

[0097] The CTB battery box proposed in this application, through the design of the guide component and the first explosion-proof valve, can achieve the effect of directional venting. When a battery cell goes out of control, it can be vented to the outside of the CTB battery box through the shortest path, thereby improving venting efficiency. In addition, while the guide component can vent high-temperature gas, it can also be used to support the box cover, and the pressure on the box cover can be directly transferred to the lower box body through the guide component, avoiding the risk of the pressure on the box cover being transferred to the terminal post and causing the battery cell to fail.

[0098] The CTB battery box provided in this application will be described in detail below with reference to specific embodiments.

[0099] Figure 1 This is a schematic diagram of the CTB battery box according to an embodiment of this application. Figure 2 This is an exploded view of the CTB battery box according to an embodiment of this application. Figure 3 This is a partial structural schematic diagram of the CTB battery box from a first-view perspective, according to an embodiment of this application. Figure 4 This is a schematic diagram of the structure of the battery cell in the CTB battery box according to an embodiment of this application. Figure 5This is a schematic diagram of the assembly of the second explosion-proof valve in the CTB battery box according to an embodiment of this application.

[0100] like Figures 1 to 5 As shown in the figure, this application provides a CTB battery box 100, comprising:

[0101] The box 110 includes a box cover 111 and a lower box 112. The lower box 112 includes multiple frames, which are hollow structures. The lower box 112 and the box cover 111 cover each other to form a receiving cavity 1101.

[0102] The battery module 120 is installed in the receiving cavity 1101. The battery module 120 includes multiple battery cells 121. Each battery cell 121 has a battery explosion-proof valve 1211, which is located on the top side of the battery cell 121.

[0103] The guide assembly 130 is located in the lower housing 112 and on the battery module 120. The guide assembly 130 has a hollow structure and is used to connect the frame and the battery explosion-proof valve 1211.

[0104] The first explosion-proof valve 140 is mounted on the frame and is connected to the frame.

[0105] It is understandable that the function of the receiving cavity 1101 is to accommodate the battery module 120. It is easy to understand that the receiving cavity 1101 is in a sealed state to prevent side reactions from occurring in the internal system of the battery cell 121 in the battery module 120, which would affect the performance of the battery cell 121.

[0106] For example, the size or shape of the receiving cavity 1101 is matched with the size and shape of the battery module 120. Specifically, it can be adjusted according to the actual situation. This application embodiment does not impose too many restrictions here.

[0107] In one possible implementation, the housing 110 can be a rectangular structure, and the size of the housing 110 can be greater than or equal to the size of the battery module 120, so that the housing 110 can support the battery module 120.

[0108] The dimensions of the aforementioned housing 110 can be set according to actual needs, and this embodiment of the application does not impose any restrictions on them.

[0109] In addition, it should be noted that the shape of the box 110 is not limited in this embodiment. For example, the box 110 can be a regular shape such as a cuboid or a cylinder. Of course, the box 110 can also be other irregular shapes.

[0110] In some embodiments, the cover 111 and the lower box body 112 are connected by bolts to achieve the sealing performance of the box body 110.

[0111] In this embodiment, the battery module 120 can be configured as a rectangular structure. The battery module 120 can be located inside the housing 110.

[0112] Understandably, the housing 110 can be used to support the battery module 120.

[0113] It should be noted that X represents the length direction of the CTB battery box 100, and Y represents the width direction of the CTB battery box 100.

[0114] It should be noted that the battery module 120 is a battery device that can integrate multiple battery cells 121. Multiple battery cells 121 connected in series and parallel can provide a larger amount of power, and have the advantages of high integration and high structural stability. In order to enable multiple battery cells 121 to be connected in series and parallel, the multiple battery cells 121 can be connected through a busbar.

[0115] In some embodiments, the battery cell 121 also has two terminals 1212, which have opposite polarities. One terminal 1212 is the positive terminal and the other terminal 1212 is the negative terminal. Along the length direction X of the CTB battery box 100, the battery explosion-proof valve 1211 is located between the two terminals 1212.

[0116] It should be noted that cell 121 is a square cell 121 with a protruding terminal post 1212, and the battery explosion-proof valve 1211 is located in the middle of the positive and negative terminals 1212.

[0117] In some embodiments, along the length of the battery module 120, an isolation plate is provided between two adjacent cells 121. The isolation plate is located between two adjacent cells 121 and its function is to absorb and alleviate the mechanical stress between the cells 121, and to prevent the cells 121 from being damaged by vibration or impact during transportation or use.

[0118] In some embodiments, the separator can be foam, which typically has good thermal insulation properties. Placing it between the large surfaces of two adjacent cells 121 can effectively reduce heat transfer between the cells 121. This helps control the temperature distribution inside the battery module 120, prevents localized overheating, and improves battery safety and lifespan.

[0119] In some embodiments, the separator is an aerogel separator 122 with double-sided adhesive on both sides, which has the function of slowing down heat diffusion between the battery cells 121.

[0120] It should be noted that the guide assembly 130 is located directly above the battery module 120 and is fixed to the lower housing 112 by rivets. When the cell 121 experiences thermal runaway, high-temperature gas is ejected from the battery explosion-proof valve 1211 of the cell 121, passes through the guide assembly 130 to the frame of the lower housing 112, and is discharged to the outside of the CTB battery box 100 through the first explosion-proof valve 140.

[0121] In some embodiments, the ribbed area of ​​the cover 111 coincides with the installation area of ​​the guide assembly 130, ensuring that the guide assembly 130 provides optimal support for the cover 111.

[0122] Through the above-mentioned design, namely the guide component 130 and the first explosion-proof valve 140, the effect of directional exhaust can be achieved. When a cell 121 goes out of control, it can be discharged to the outside of the CTB battery box 100 through the shortest path, thus improving the exhaust efficiency. In addition, while the guide component 130 can discharge high-temperature gas, it can also be used to support the box cover 111. The pressure on the box cover 111 is directly transmitted to the lower box body 112 through the guide component 130, thus avoiding the risk that the pressure of the box cover 111 will be transmitted to the terminal post 1212 and cause the cell 121 to fail.

[0123] In some embodiments, the CTB battery box 100 also includes a battery management system (BMS), a cooling system, and sensors.

[0124] The Battery Management System (BMS) is responsible for monitoring and managing the status of battery cells, including voltage, current, temperature, and state of charge. It can also balance the charge between battery cells, ensuring the safe and efficient operation of the system.

[0125] To ensure the batteries operate within their optimal temperature range, the CTB battery box 100 is typically equipped with a cooling system. This cooling system can be air-cooled, liquid-cooled, or otherwise.

[0126] In some embodiments, the cooling system may be a profile liquid cooling plate. The structural design of the profile liquid cooling plate can provide additional mechanical strength and rigidity, enhance the structural stability of the entire CTB battery box 100, and reduce deformation or damage caused by vibration or impact.

[0127] In some embodiments, the cooling system can be a stamped liquid cooling plate, which is spliced ​​together by brazing aluminum plates. In order to achieve lightweighting, thinner materials are used for both the upper and lower plates, while also having more efficient thermal management performance.

[0128] The sensors are used to monitor various parameters of the CTB battery box 100, such as temperature, voltage, and current, and provide data to the BMS for analysis and control.

[0129] Continue to refer to Figures 1 to 5In some optional embodiments, the CTB battery box 100 also includes a second explosion-proof valve 150, which is disposed on the frame and is connected to the receiving cavity 1101.

[0130] It should be noted that the first explosion-proof valve 140 serves as the main exhaust valve. When there is a leak in the channel within the guide assembly 130 or it cannot handle the exhaust flow, the high-temperature gas is discharged into the CTB battery box 100 and then discharged through the second explosion-proof valve 150, thereby improving the safety of the CTB battery box 100.

[0131] In some embodiments, the second explosion-proof valve 150 serves as a backup explosion-proof valve and is installed and fixed on the side of the frame on one side of the lower housing 112. When the guide assembly 130 fails or there is a leak, the high-temperature gas is directly discharged into the CTB battery box 100 and can be discharged to the outside of the CTB battery box 100 via the second explosion-proof valve 150.

[0132] like Figure 2 As shown, in some alternative embodiments, the CTB battery box 100 further includes a buffer 160 disposed between the guide assembly 130 and the box cover 111.

[0133] It should be noted that the use of the buffer 160 further enhances the stability of the connection between the guide assembly 130 and the cover 111, which can prevent direct contact between the guide assembly 130 and the cover 111, reduce wear and physical damage, and extend the service life of the assembly.

[0134] The presence of the buffer 160 can effectively absorb and mitigate mechanical stress caused by vibration, impact or thermal expansion, protect the guide assembly 130 and the cover 111 from damage, thereby improving the durability and reliability of the CTB battery box 100.

[0135] In some embodiments, a buffer 160 may be filled between the guide assembly 130 and the cover 111 as needed, thereby improving the reliability of the cover 111 pressing the guide assembly 130.

[0136] In some embodiments, the buffer 160 may be foam with double-sided adhesive on both sides to enhance the connection and improve the reliability of the lid 111 pressing against the guide assembly 130.

[0137] Figure 6 This is an assembly cross-sectional view of the first and second side frame beams in the CTB battery box according to an embodiment of this application. Figure 7 This is a schematic diagram of the structure of the first frame beam in the CTB battery box according to an embodiment of this application. Figure 8 This is a schematic diagram of the structure of the second side beam in the CTB battery box according to an embodiment of this application.

[0138] like Figures 2 to 8 As shown, in some optional embodiments, the multiple frames include a first side frame beam 1121 and a second side frame beam 1122, each of which is at least two, and at least two first side frame beams 1121 and at least two second side frame beams 1122 are connected to each other.

[0139] The two ends of the guide assembly 130 are respectively located on at least two second side frame beams 1122.

[0140] It should be noted that, through the connection of at least two first frame beams 1121 and at least two second frame beams 1122, the frame structure may have higher stability and strength, the overall structural strength and stability are enhanced, and it can better resist external impacts and vibrations.

[0141] Because the guide assembly 130 is positioned at both ends on two opposing second frame beams 1122, this design may allow for more flexible installation and adjustment to suit different application requirements. This frame structure may also offer more efficient space utilization, enabling more functions or accommodating more equipment within a limited space.

[0142] In some embodiments, at least two first side frame beams 1121 are spaced apart along the length direction X of the CTB battery box 100, and at least two second side frame beams 1122 are spaced apart along the width direction Y of the CTB battery box 100.

[0143] In some embodiments, there are two first explosion-proof valves 140, which are symmetrically installed and fixed on the sides of the two first frame beams 1121 of the lower housing 112, for discharging high-temperature gas transmitted via the guide assembly 130.

[0144] The cavity end of the connection area between the second frame beam 1122 and the first frame beam 1121 (the 45-degree angled connection position) is isolated by welding plugs to prevent the high-temperature gas in the guide assembly 130 from being transmitted through the second frame beam 1122 to the first frame beam 1121 and then diffused into other cavities of the second frame beam 1122, thereby achieving directional exhaust and improving exhaust efficiency.

[0145] In some embodiments, the first explosion-proof valve 140 is disposed on the first side frame beam 1121, and the second explosion-proof valve 150 is disposed on the second side frame beam 1122.

[0146] Figure 9 This is an assembly cross-sectional view of the first side beam and crossbeam in the CTB battery box according to an embodiment of this application.

[0147] like Figures 1 to 9As shown, in some optional embodiments, the lower housing 112 further includes a crossbeam 1123, with both ends of the crossbeam 1123 respectively disposed on at least two first side frame beams 1121 to divide the receiving cavity 1101 into at least two cavities.

[0148] There are at least two battery modules 120, and the at least two battery modules 120 are located in at least two different cavities;

[0149] The crossbeam 1123 is a hollow structure and is connected to the first side frame beam 1121. The middle part of the guide assembly 130 is connected to the crossbeam 1123.

[0150] It should be noted that the introduction of the crossbeam 1123 provides additional support and rigidity to the lower box 112. By fixing both ends of the crossbeam 1123 to at least two first frame beams 1121 respectively, the strength and stability of the entire structure are improved, enabling it to better withstand mechanical stress and vibration.

[0151] Furthermore, by dividing the receiving cavity 1101 into at least two cavities via the crossbeam 1123, a modular arrangement of the battery modules 120 can be achieved. Each battery module 120 is located in a different cavity, a design that helps optimize space utilization and improves system flexibility and maintainability.

[0152] The crossbeam 1123 is a hollow structure and is connected to the first frame beam 1121 to discharge hot gas, thereby achieving more efficient thermal management. In addition, the middle part of the guide assembly 130 is connected to the crossbeam 1123, which further ensures that gas can be quickly discharged in the event of a runaway cell 121, enhancing the safety of the system.

[0153] In some embodiments, the welding positions (90-degree T-shaped connection positions) of the first side beam 1121 to the crossbeam 1123 and the second side beam 1122 are provided with corresponding through-hole features for the release of high-temperature gas.

[0154] Specifically, when thermal runaway occurs in cell 121, high-temperature gas is ejected from the battery explosion-proof valve 1211 of cell 121, passes through the guide assembly 130 to the crossbeam 1123 or the second side frame beam 1122, then to the first side frame beam 1121, and is discharged to the outside of CTB battery box 100 through the first explosion-proof valve 140.

[0155] Figure 10 This is a top view of the CTB battery box according to an embodiment of this application. Figure 11 for Figure 10 Sectional view along the AA direction. Figure 12 for Figure 11 A magnified view of a section at point I. Figure 13This is a partial structural diagram of the CTB battery box from a second perspective, according to an embodiment of this application. Figure 14 This is a schematic diagram of the guide assembly in the CTB battery box according to an embodiment of this application. Figure 15 This is an exploded view of the guide assembly in the CTB battery box according to an embodiment of this application. Figure 16 This is a schematic diagram of the bottom support structure of the CTB battery box according to an embodiment of this application. Figure 17 for Figure 16 A magnified view of section II in the middle.

[0156] like Figure 2 , Figure 3 as well as Figures 10 to 17 As shown, in some optional embodiments, the guide assembly 130 includes a guide housing 133 and a first rotating member 131. The guide housing 133 is disposed on the second side frame beam 1122 and has a plurality of guide holes 1334 facing the battery explosion-proof valve 1211.

[0157] The first rotating member 131 is rotatably disposed within the guide housing 133 and movably covers the guide hole 1334.

[0158] It should be noted that the guide housing 133 is provided with multiple guide holes 1334, which face the battery explosion-proof valve 1211. When the battery explosion-proof valve 1211 is activated, the gas can push the first rotating member 131 to rotate, causing the first rotating member 131 to open, thereby exposing the guide holes 1334. The gas can then be quickly discharged through the guide holes 1334, which allows control over the direction and flow of gas discharge, helping to achieve more precise exhaust control and improve system safety.

[0159] Furthermore, the first rotating member 131 is rotatable within the guide housing 133, meaning that the opening and closing state of the guide hole 1334 can be dynamically adjusted as needed. This flexibility allows the system to optimize the exhaust path and efficiency under different operating conditions. By actively covering the guide hole 1334, the first rotating member 131 can close the guide hole 1334 when exhaust is not required, thereby preventing external impurities or moisture from entering the system.

[0160] When the battery experiences thermal runaway, the guide assembly 130 can respond quickly by opening the guide hole 1334 to rapidly discharge high-temperature and high-pressure gases, thereby reducing internal pressure and temperature and minimizing the impact on other cells 121.

[0161] It should be noted that the design of the guide hole 1334 can effectively guide the flow direction of the high-temperature gas and substances released by the battery explosion-proof valve 1211, preventing them from being directly sprayed onto other sensitive components, such as adjacent battery cells 121, which helps to reduce the potential damage of high-temperature gas to other components inside the battery module 120.

[0162] In some embodiments, the first rotating member 131 may be a rotating plate that rotates relative to the guide housing 133 via a rotating shaft 134.

[0163] like Figures 11 to 15 As shown, in some embodiments, the guide housing 133 includes a base 135 and an upper cover 136. The base 135 is a load-bearing component of the entire guide housing 133 and is U-shaped.

[0164] like Figure 2 , Figure 16 as well as Figure 17 As shown, in some embodiments, a guide hole 1334 with the same shape as the battery explosion-proof valve 1211 is machined on the bottom of the base 135. The guide hole 1334 is an elliptical through hole. The position of the through hole is completely consistent with the position of the battery explosion-proof valve 1211 on the battery module 120. On the upper surface of the bottom of the base 135, a rectangular countersunk hole feature is milled with the elliptical through hole as the center.

[0165] In some embodiments, the first rotating member 131 has the same height as the rectangular countersunk hole, is fixed on one side of the base 135 by a rotating shaft 134, and is completely embedded in the rectangular countersunk hole of the base 135, and the first rotating member 131 can rotate along the rotating shaft 134.

[0166] In some embodiments, the bottom lower surface of the base 135 has a raised feature along the outer edge of the elliptical feature, and a groove is machined on the outer surface of the raised feature. The groove is used to install a sealing ring, which improves the sealing effect of the guide housing 133 on the battery explosion-proof valve 1211, thereby reducing the leakage of high-temperature gas.

[0167] It should be noted that the first rotating component 131 can not only guide the high-temperature gas, but also protect the explosion-proof valve of the uncontrolled battery cell 121.

[0168] In some embodiments, the upper cover plate 136 is a rectangular thin plate, which is welded and fixed to the bottom support 135 as a whole, serving to seal and support the box cover 111.

[0169] When a certain cell 121 experiences thermal runaway, the battery explosion-proof valve 1211 opens, and the first rotating part 131 at the corresponding position rotates and opens under the action of high-temperature gas, allowing the high-temperature gas to be discharged. The other first rotating parts 131 do not open, which can protect other unrunaway cells 121 from being affected by high-temperature gas and reduce the probability of thermal diffusion.

[0170] like Figure 2 , Figure 3 , Figure 13 as well as Figure 14As shown, in some optional embodiments, the guide housing 133 includes a first guide portion 1331, a second guide portion 1332, and a third guide portion 1333 that are in communication with each other.

[0171] The third guide portion 1333 is provided on the crossbeam 1123. Along the extension direction of the guide assembly 130, the first guide portion 1331 and the second guide portion 1332 are located on opposite sides of the third guide portion 1333, and are both provided on the second side frame beam 1122.

[0172] It should be noted that the guide housing 133 is composed of a first guide portion 1331, a second guide portion 1332, and a third guide portion 1333, and these components are interconnected, allowing gas to be discharged through multiple paths, thereby improving exhaust efficiency and system response speed. In the event of a battery runaway, it can rapidly reduce internal pressure and temperature.

[0173] The third guide section 1333 is disposed on the crossbeam 1123 and arranged along the extension direction of the guide assembly 130. The first guide section 1331 and the second guide section 1332 are respectively located on opposite sides of the third guide section 1333 and disposed on the second frame beam 1122, which helps to optimize the airflow path, ensure that the gas can be effectively discharged from the system, and reduce the impact on other components.

[0174] Furthermore, by combining the third guide section 1333 with the crossbeam 1123, the guide assembly 130 not only achieves the exhaust function, but also is closely integrated with the structural support.

[0175] In some embodiments, the first guide portion 1331, the second guide portion 1332, and the third guide portion 1333 are all fixed to the guide housing 133 by welding. The first guide portion 1331 and the second guide portion 1332 are L-shaped pipes that transmit the high-temperature gas in the guide housing 133 to the second side beam 1122. The third guide portion 1333 is a T-shaped pipe that transmits the high-temperature gas in the guide housings 133 on both sides to the crossbeam 1123.

[0176] In some embodiments, the first guide portion 1331 and the second guide portion 1332 are inserted into the corresponding notches of the second side frame beam 1122 and then fixed with rivets.

[0177] In some embodiments, the third guide portion 1333 is inserted into the corresponding notch of the crossbeam 1123 and then fixed with rivets. The first guide portion 1331, the second guide portion 1332 and the third guide portion 1333 support the guide housing 133 at a height that is in close contact with the battery explosion-proof valve 1211 of the battery module 120 and is not squeezed.

[0178] In some alternative embodiments, there are multiple first rotating members 131;

[0179] Along the extending direction of the guide housing 133, the rotation direction of a plurality of first rotating members 131 located on one side of the guide housing 133 is opposite to the rotation direction of a plurality of first rotating members 131 located on the other side of the guide housing 133.

[0180] It should be noted that by arranging multiple first rotating members 131 on both sides of the guide housing 133 and having them rotate in opposite directions, the gas flow path can be controlled more precisely. This design allows for flexible adjustment of the airflow direction under different conditions, thereby optimizing exhaust efficiency.

[0181] With this design, the gas can be guided more effectively to the predetermined emission path, reducing eddies and unnecessary gas retention within the guide housing 133, thereby improving exhaust efficiency and system response speed.

[0182] For example, the first rotating member 131 can only be opened and closed by rotating on one side within the guide housing 133 via the rotating shaft 134. When one side is opened, the channel on the other side will be closed under the action of the first rotating member 131, thereby realizing the directional discharge of high temperature gas.

[0183] The first rotating component 131 is installed symmetrically inside the guide housing 133. That is, the opening direction of several first rotating components 131 on one side is towards the third guide part 1333, while the opening direction of several first rotating components 131 on the other side is away from the third guide part 1333. This ensures that the transmission path of high temperature gas inside the guide assembly 130 is the shortest and improves the exhaust efficiency.

[0184] Figure 18 This is a schematic diagram of the cell exhaust principle at point A in the CTB battery box from a second perspective, according to an embodiment of this application. Figure 19 This is a schematic diagram of the cell venting principle at point A in the CTB battery box from a third-view perspective, according to an embodiment of this application.

[0185] like Figure 18 and Figure 19 As shown, the example of cell 121 at point A is used for illustration. Exemplarily, multiple first rotating members 131 in the first guide portion 1331 that are opposite to the third guide portion 1333 rotate and open along the second direction, so that the gas from the battery explosion-proof valve 1211 flows through the guide hole 1334 to the second frame beam 1122, and finally flows to the first frame beam 1121, and flows out through the first explosion-proof valve 140.

[0186] Figure 20 This is a schematic diagram of the cell exhaust principle at point B in the CTB battery box from a second perspective, according to an embodiment of this application. Figure 21 This is a schematic diagram of the cell exhaust principle at point B in the CTB battery box from a third-view perspective, according to an embodiment of this application.

[0187] like Figure 20 and Figure 21 As shown, the example of cell 121 at point B will be used for illustration. Exemplarily, there are multiple first rotating members 131 in the first guide portion 1331. Among them, the multiple first rotating members 131 near the third guide portion 1333 in the first guide portion 1331 rotate and open along the first direction, so that the gas from the battery explosion-proof valve 1211 flows through the guide hole 1334 to the third guide portion 1333, then flows to the crossbeam 1123, and finally flows to the first frame beam 1121, and flows out through the first explosion-proof valve 140.

[0188] Correspondingly, in the second guide section 1332, there are multiple first rotating members 131. Among them, the multiple first rotating members 131 in the second guide section 1332 near the third guide section 1333 rotate and open along the second direction, so that the gas from the battery explosion-proof valve 1211 flows through the guide hole 1334 to the third guide section 1333, then flows to the crossbeam 1123, and finally flows to the first frame beam 1121, and flows out through the first explosion-proof valve 140.

[0189] In the second guide section 1332, multiple first rotating parts 131 that are opposite to the third guide section 1333 rotate and open along the first direction, so that the gas from the battery explosion-proof valve 1211 flows through the guide hole 1334 to the second frame beam 1122, and finally flows to the first frame beam 1121, and flows out through the first explosion-proof valve 140.

[0190] In some alternative embodiments, the guide housing 133 may further include a first baffle and a second baffle;

[0191] Along the extending direction of the guide assembly 130, a first baffle is provided in the middle of the first guide portion 1331 to divide the first guide portion 1331 into a first channel and a second channel. The first channel is connected to the second side frame beam 1122, and the second channel is connected to the third guide portion 1333.

[0192] Along the extending direction of the guide assembly 130, a second baffle is provided in the middle of the second guide portion 1332 to divide the second guide portion 1332 into a third channel and a fourth channel. The third channel is connected to the second side frame beam 1122, and the fourth channel is connected to the third guide portion 1333.

[0193] It should be noted that by respectively setting a first baffle and a second baffle in the first guide section 1331 and the second guide section 1332, each guide section is divided into two channels (a first channel and a second channel; a third channel and a fourth channel). This design allows for more precise control of the airflow distribution, enabling the gas to flow to a specific path as needed.

[0194] The first and third channels are connected to the second side beam 1122, while the second and fourth channels are connected to the third guide section 1333. This configuration optimizes the gas discharge path, ensuring that the gas can be discharged from the system quickly and effectively, reducing stagnation and eddies.

[0195] By separating the airflow into different channels, cross-interference between different airflows can be reduced, improving exhaust efficiency and system stability.

[0196] In some alternative embodiments, the guide assembly 130 further includes a second rotating member 132 and a third rotating member;

[0197] The second rotating member 132 is rotatably disposed on the side of the first guide portion 1331 facing the third guide portion 1333, and the second rotating member 132 has an open position and a closed position;

[0198] When the second rotating member 132 rotates to the open position, the first guide portion 1331 and the third guide portion 1333 are connected to allow the gas in the first guide portion 1331 to flow to the third guide portion 1333. When the second rotating member 132 rotates to the closed position, the connection between the first guide portion 1331 and the third guide portion 1333 is blocked.

[0199] The third rotating member is rotatably disposed on the side of the second guide portion 1332 facing the third guide portion 1333, and the third rotating member has an open position and a closed position;

[0200] When the third rotating member is rotated to the open position, the second guide portion 1332 and the third guide portion 1333 are connected to allow the gas in the second guide portion 1332 to flow to the third guide portion 1333. When the third rotating member is rotated to the closed position, the connection between the second guide portion 1332 and the third guide portion 1333 is blocked.

[0201] It should be noted that the introduction of the second rotating member 132 and the third rotating member allows the system to flexibly control the gas flow path as needed. By setting the second rotating member 132 and the third rotating member to the open or closed position, the airflow between the first guide section 1331, the second guide section 1332, and the third guide section 1333 can be selectively connected or blocked. This flexibility allows for optimization of the gas emission path under different operating conditions.

[0202] In cases of battery runaway or other situations requiring rapid venting, the position of rotating components can be quickly adjusted to achieve the optimal venting path. Precise control of the gas flow path effectively manages and limits gas propagation within the system, reducing its impact on other components. This design helps prevent the spread of potential faults, improving the overall safety and reliability of the system.

[0203] In some embodiments, a protruding feature is machined at both ends of the bottom of the base 135 to restrict the rotation of the second rotating member 132 and the third rotating member toward the interior of the guide housing 133.

[0204] The second rotating member 132 and the third rotating member are respectively mounted on the ends of the first guide portion 1331 and the second guide portion 1332 via the rotating shaft 134. The shapes of the second rotating member 132 and the third rotating member are consistent with the area enclosed by the bottom support 135 and the upper cover plate 136, which can form a sealing effect. The second rotating member 132 and the third rotating member can rotate along the rotating shaft 134.

[0205] The CTB battery box provided in this application embodiment includes a box body, which includes a box cover and a lower box body. The lower box body includes multiple frames, which are hollow structures. The lower box body and the box cover are closed to form a receiving cavity. A battery module is installed in the receiving cavity. The battery module includes multiple battery cells. Each battery cell has a battery explosion-proof valve located on the top side of the battery cell. A guide assembly is located in the lower box body and on the battery module. The guide assembly is hollow and is used to connect the frame and the battery explosion-proof valve. A first explosion-proof valve is located in the frame and is connected to the frame.

[0206] The design of the guide assembly and the first explosion-proof valve enables directional venting. When a cell malfunctions, it can be vented to the outside of the CTB battery box via the shortest path, improving venting efficiency. In addition, while venting high-temperature gas, the guide assembly can also support the box cover, directly transferring the pressure on the box cover to the lower box body, thus avoiding the risk of the pressure on the box cover being transferred to the terminal post and causing cell failure.

[0207] In addition, this application embodiment also provides an electrical device, including the CTB battery box 100 described above.

[0208] It should be noted that the specific structure of the CTB battery box 100 will not be specified here; please refer to the above.

[0209] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0210] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0211] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A CTB battery box (100), characterized in that, include: The box body (110) includes a box cover (111) and a lower box body (112). The lower box body (112) includes multiple frames, which are hollow structures. The lower box body (112) and the box cover (111) cover each other to form a receiving cavity (1101). A battery module (120) is installed in the receiving cavity (1101). The battery module (120) includes a plurality of battery cells (121). Each battery cell (121) has a battery explosion-proof valve (1211) located on the top side of the battery cell (121). A guide assembly (130) is disposed on the lower housing (112) and located on the battery module (120). The guide assembly (130) has a hollow structure and is used to connect the frame and the battery explosion-proof valve (1211). A first explosion-proof valve (140) is disposed on the frame and is connected to the frame.

2. The CTB battery box (100) according to claim 1, characterized in that, The CTB battery box (100) also includes a second explosion-proof valve (150), which is located on the frame and is connected to the receiving cavity (1101).

3. The CTB battery box (100) according to claim 2, characterized in that, The CTB battery box (100) also includes a buffer (160) disposed between the guide assembly (130) and the box cover (111).

4. The CTB battery box (100) according to any one of claims 1-3, characterized in that, The plurality of said frames include a first side frame beam (1121) and a second side frame beam (1122), wherein there are at least two first side frame beams (1121) and at least two second side frame beams (1122), and at least two first side frame beams (1121) and at least two second side frame beams (1122) are connected to each other; The guide component (130) is located at both ends on at least two of the second side frame beams (1122).

5. The CTB battery box (100) according to claim 4, characterized in that, The lower housing (112) also includes a crossbeam (1123), the two ends of which are respectively disposed on at least two of the first side frame beams (1121) to divide the receiving cavity (1101) into at least two cavities; There are at least two battery modules (120), and the at least two battery modules (120) are located in at least two different cavities; The crossbeam (1123) is a hollow structure and is connected to the first side frame beam (1121). The middle part of the guide component (130) is connected to the crossbeam (1123).

6. The CTB battery box (100) according to claim 5, characterized in that, The guide assembly (130) includes a guide housing (133) and a first rotating member (131). The guide housing (133) is disposed on the second side frame beam (1122). The guide housing (133) has a plurality of guide holes (1334), and the guide holes (1334) face the battery explosion-proof valve (1211). The first rotating member (131) is rotatably disposed within the guide housing (133) and movably covers the guide hole (1334).

7. The CTB battery box (100) according to claim 6, characterized in that, There are multiple first rotating members (131); Along the extending direction of the guide housing (133), the rotation direction of a plurality of first rotating members (131) located on one side of the guide housing (133) is opposite to the rotation direction of a plurality of first rotating members (131) located on the other side of the guide housing (133).

8. The CTB battery box (100) according to claim 7, characterized in that, The guide housing (133) includes a first guide portion (1331), a second guide portion (1332), and a third guide portion (1333) that are interconnected; The third guide portion (1333) is provided on the crossbeam (1123). Along the extension direction of the guide assembly (130), the first guide portion (1331) and the second guide portion (1332) are located on opposite sides of the third guide portion (1333) and are both provided on the second side frame beam (1122).

9. The CTB battery box (100) according to claim 8, characterized in that, The guide assembly (130) further includes a second rotating member (132) and a third rotating member; The second rotating member (132) is rotatably disposed on the side of the first guide portion (1331) facing the third guide portion (1333), and the second rotating member (132) has an open position and a closed position; When the second rotating member (132) rotates to the open position, the first guide portion (1331) and the third guide portion (1333) are connected to each other so that the gas in the first guide portion (1331) can flow to the third guide portion (1333). When the second rotating member (132) rotates to the closed position, the communication between the first guide portion (1331) and the third guide portion (1333) is blocked. The third rotating member is rotatably disposed on the side of the second guide portion (1332) facing the third guide portion (1333), and the third rotating member has an open position and a closed position; When the third rotating member rotates to the open position, the second guide portion (1332) and the third guide portion (1333) are connected to allow gas in the second guide portion (1332) to flow to the third guide portion (1333). When the third rotating member rotates to the closed position, it blocks the communication between the second guide portion (1332) and the third guide portion (1333).

10. An electrical appliance, characterized in that, Includes the CTB battery box (100) as described in any one of claims 1 to 9.

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