Battery case, battery, and electric device

Abstract

The present application provides a battery case, a battery, and an electric device. The battery case comprises a base and a support plate; the support plate is connected to the base; the support plate and the base define a pressure relief channel; one of the support plate and the base is provided with a blocking portion; the blocking portion is located at one end of the pressure relief channel; and the other one of the support plate and the base is sealingly connected to the blocking portion so as to block one end of the pressure relief channel. The battery case of the present application reduces the impact of battery thermal runaway on electrical devices.

Description

Battery boxes, batteries and electrical equipment

[0001] This application claims priority to Chinese patent application No. 202520143339.0, filed with the Chinese Patent Office on January 21, 2025.

[0002] Priority is claimed in Chinese Patent Application No. 202510096374.6, filed with the Chinese Patent Office on January 21, 2025; the entire contents of the above application are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to battery boxes, batteries and electrical equipment. Background Technology

[0004] Batteries are widely used in energy storage systems, transportation, and consumer electronics. Battery thermal runaway refers to the phenomenon where, during battery operation, the accelerated chemical reactions caused by increased internal temperature lead to a further rise in temperature, creating a self-reinforcing feedback loop that can ultimately result in overheating, smoke, combustion, or even explosion of the battery. Invention Overview

[0005] In related technologies, the high-temperature gases generated during battery thermal runaway can easily spread to the location of electrical equipment, causing significant damage to the equipment.

[0006] In a first aspect, this application provides a battery box, comprising:

[0007] Base;

[0008] A bracket is connected to the base, and the bracket and the base together form a pressure relief channel;

[0009] One of the bracket and the base has a sealing part located at one end of the pressure relief channel, and the other of the bracket and the base is sealed to the sealing part to seal one end of the pressure relief channel.

[0010] Secondly, this application provides a battery, including a battery cell and the aforementioned battery case, wherein the battery cell is mounted on the side of the bracket opposite to the pressure relief channel.

[0011] Thirdly, this application provides an electrical device including the battery described above. Beneficial effects

[0012] The battery box provided in this application connects the bracket and the base together, forming a pressure relief channel. When the battery experiences thermal runaway, high-temperature gas can be discharged through this channel, thus relieving pressure on the battery. Simultaneously, by sealing one end of the pressure relief channel, it becomes a one-way channel, ensuring that the high-temperature gas generated during thermal runaway can only flow in one direction, preventing bidirectional flow. In other words, by sealing the channel, this application makes it a one-way pressure relief channel. By placing the electrical equipment on the side of the sealing section away from the pressure relief channel, it effectively prevents the high-temperature gas generated during battery thermal runaway from spreading to the location of the electrical equipment, reducing the impact of battery thermal runaway on the electrical equipment. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the structure of the battery box provided in an embodiment of this application;

[0014] Figure 2 is an enlarged schematic diagram of the structure at point A in Figure 1 provided in an embodiment of this application;

[0015] Figure 3 is a second schematic diagram of the battery box provided in an embodiment of this application;

[0016] Figure 4 is an enlarged schematic diagram of the structure at point B in Figure 3 provided in an embodiment of this application;

[0017] Figure 5 is a schematic diagram of the structure of the base provided in an embodiment of this application;

[0018] Figure 6 is an enlarged schematic diagram of the structure at point C in Figure 5 provided in an embodiment of this application;

[0019] Figure 7 is a schematic diagram of the structure of the bracket provided in an embodiment of this application;

[0020] Figure 8 is an enlarged schematic diagram of the structure at point D in Figure 7 provided in an embodiment of this application;

[0021] Figure 9 is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0022] Figure 10 is an enlarged schematic diagram of the structure at point E in Figure 9 provided in an embodiment of this application;

[0023] Figure 11 is a second schematic diagram of the battery structure provided in an embodiment of this application;

[0024] Figure 12 is an enlarged schematic diagram of the structure at point F in Figure 11 provided in an embodiment of this application;

[0025] Figure 13 is a third schematic diagram of the battery structure provided in the embodiments of this application;

[0026] Figure 14 is a cross-sectional view of a battery provided in an embodiment of this application;

[0027] Figure 15 is an enlarged schematic diagram of the structure at point G in Figure 14 provided in an embodiment of this application. Embodiments of the present invention

[0028] An embodiment of this application discloses a battery box. Referring to Figures 1, 2, 3 and 4, the battery box includes a base 1 and a support 2. The support 2 is connected to the base 1, and the support 2 and the base 1 form a pressure relief channel 3.

[0029] One of the bracket 2 and the base 1 has a sealing part 4, which is located at one end of the pressure relief channel 3. The other of the bracket 2 and the base 1 is sealed to the sealing part 4 to seal one end of the pressure relief channel 3.

[0030] According to the battery box of this application embodiment, the bracket 2 and the base 1 are connected together, so that the bracket 2 and the base 1 form a pressure relief channel 3. When the battery experiences thermal runaway, high-temperature gas can be discharged through the pressure relief channel 3 to relieve the pressure on the battery. At the same time, one end of the pressure relief channel 3 is blocked by the sealing part 4, so that the pressure relief channel 3 is only open at one end, making the pressure relief channel 3 a unidirectional pressure relief channel 3. The high-temperature gas generated when the battery experiences thermal runaway can only flow in one direction along the pressure relief channel 3, which can prevent the high-temperature gas from flowing bidirectionally along the pressure relief channel 3. In other words, this application makes the pressure relief channel 3 a unidirectional pressure relief channel by using the sealing part 4. By placing the electrical equipment on the side of the sealing part 4 away from the pressure relief channel 3, the high-temperature gas generated when the battery experiences thermal runaway can be effectively prevented from spreading to the location of the electrical equipment, reducing the impact of battery thermal runaway on the electrical equipment.

[0031] Understandably, in related technologies, the pressure relief channel 3 has a bidirectional flow structure, meaning that high-temperature gas can flow through both ends of the pressure relief channel 3. Consequently, regardless of which side of the pressure relief channel 3 the electrical equipment is located on, when the battery experiences thermal runaway, the high-temperature gas will spread to the location of the electrical equipment, causing significant impact and even damage. This application, however, seals one end of the pressure relief channel 3 with the sealing part 4, preventing the high-temperature gas generated during battery thermal runaway from flowing simultaneously to both ends of the pressure relief channel 3. By placing the electrical equipment on the side of the sealing part 4 away from the pressure relief channel 3, the high-temperature gas will flow away from the electrical equipment, preventing it from spreading to the location of the electrical equipment and effectively reducing the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0032] In some examples, the base 1 is, for example, an aluminum profile base, and the bracket 2 is, for example, a plastic bracket.

[0033] In some embodiments, both the bracket 2 and the base 1 have a sealing portion 4, and the sealing portion 4 of the bracket 2 is sealed to the sealing portion 4 of the base 1.

[0034] It is understandable that the sealing part 4 of the bracket 2 and the sealing part 4 of the base 1 cooperate to block one end of the pressure relief channel 3, making the pressure relief channel 3 a one-way pressure relief channel 3. Then, electrical equipment can be installed on the side of the sealing part 4 away from the pressure relief channel 3, which can prevent high temperature gas from spreading to the location of the electrical equipment and effectively reduce the impact of high temperature gas generated during battery thermal runaway on the electrical equipment.

[0035] It is understandable that the sealing part 4 of the bracket 2 and the sealing part 4 of the base 1 are sealed together, so that gas cannot pass through the connection between the sealing part 4 of the bracket 2 and the sealing part 4 of the base 1, thus preventing the high-temperature gas generated during battery thermal runaway from flowing to the electrical equipment through the connection between the sealing part 4 of the bracket 2 and the sealing part 4 of the base 1.

[0036] In some embodiments, the sealing portion 4 of the bracket 2 is sealed to the base 1.

[0037] It is understandable that the bracket 2 has a sealing part 4, and the sealing part 4 cooperates with the base 1 to seal one end of the pressure relief channel 3, making the pressure relief channel 3 a one-way pressure relief channel 3. Then, electrical equipment can be installed on the side of the sealing part 4 away from the pressure relief channel 3, which can prevent high temperature gas from spreading to the location of the electrical equipment and effectively reduce the impact of high temperature gas generated during battery thermal runaway on the electrical equipment.

[0038] Understandably, the sealing part 4 of the bracket 2 is sealed to the base 1, so that gas cannot pass through the connection between the sealing part 4 of the bracket 2 and the base 1, thus preventing the high-temperature gas generated during battery thermal runaway from flowing to the electrical equipment through the connection between the sealing part 4 of the bracket 2 and the base 1.

[0039] In some embodiments, the sealing portion 4 of the base 1 is sealed to the bracket 2.

[0040] It is understandable that the base 1 has a sealing part 4, and the sealing part 4 cooperates with the bracket 2 to seal one end of the pressure relief channel 3, making the pressure relief channel 3 a one-way pressure relief channel 3. Then, electrical equipment can be installed on the side of the sealing part 4 away from the pressure relief channel 3, which can prevent high temperature gas from spreading to the location of the electrical equipment and effectively reduce the impact of high temperature gas generated during battery thermal runaway on the electrical equipment.

[0041] Understandably, the sealing part 4 of the base 1 is sealed to the bracket 2, preventing gas from passing through the connection between the sealing part 4 of the base 1 and the bracket 2, thus preventing the high-temperature gas generated during battery thermal runaway from flowing to the electrical equipment through the connection between the sealing part 4 of the base 1 and the bracket 2.

[0042] In some embodiments, the sealing portion 4 of the bracket 2 is sealed to the base 1, and at the same time, the sealing portion 4 of the base 1 is sealed to the bracket 2.

[0043] It is understandable that both the bracket 2 and the base 1 have a sealing part 4. The sealing part 4 of the bracket 2 and the base 1 can seal one end of the pressure relief channel 3 in a sealed fit. The sealing part 4 of the base 1 and the bracket 2 can also seal one end of the pressure relief channel 3 in a sealed fit, thus achieving double sealing of one end of the pressure relief channel 3 and ensuring the sealing effect of the pressure relief channel 3.

[0044] In some embodiments, referring to Figures 2, 4, 5 and 6, the base 1 has a sealing groove 11, and the sealing part 4 is inserted into the sealing groove 11.

[0045] Understandably, inserting the sealing part 4 into the sealing groove 11 allows the sealing part 4 to be positioned within the sealing groove 11, preventing it from shifting under the influence of high-temperature and high-pressure gas generated during battery thermal runaway. This improves the installation stability of the sealing part 4, allowing it to stably seal the pressure relief channel 3. Consequently, the high-temperature gas generated during battery thermal runaway cannot flow simultaneously to both ends of the pressure relief channel 3. Furthermore, by placing the electrical equipment on the side of the sealing part 4 away from the pressure relief channel 3, the high-temperature gas will flow away from the electrical equipment, preventing it from spreading to the location of the electrical equipment and effectively reducing the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0046] The battery box also includes a seal, which is located between the sealing part 4 and the groove wall of the sealing groove 11.

[0047] Understandably, the seal can improve the sealing performance between the sealing part 4 and the sealing groove 11, preventing gas from flowing from the sealing part 4 and the sealing groove 11 to the electrical equipment. This can prevent the high-temperature gas generated during battery thermal runaway from flowing to the electrical equipment through the sealing part 4 and the sealing groove 11, thus preventing the high-temperature gas from spreading to the location of the electrical equipment and effectively reducing the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0048] In some embodiments, the sealing part 4 is fixedly connected to the base 1 by welding.

[0049] It is understandable that fixing the sealing part 4 and the base 1 by welding improves the connection stability between the sealing part 4 and the base 1.

[0050] It is understandable that fixing the sealing part 4 and the base 1 by welding can improve the sealing performance of the connection between the sealing part 4 and the base 1, prevent gas from flowing from the connection between the sealing part 4 and the base 1 to the electrical equipment, and thus prevent the high-temperature gas generated during battery thermal runaway from flowing to the electrical equipment through the connection between the sealing part 4 and the base 1. This can prevent the high-temperature gas from spreading to the location of the electrical equipment and effectively reduce the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0051] In some embodiments, referring to Figures 2, 4, 5 and 6, the battery box further includes a support component 5, which is connected between the bracket 2 and the base 1. The support component 5, the bracket 2 and the base 1 form a pressure relief channel 3, and the extension direction of the pressure relief channel 3 is the same as the extension direction of the support component 5.

[0052] It is understandable that the support component 5 separates the bracket 2 and the base 1, so that the support component 5, bracket 2 and base 1 can form a pressure relief channel 3. When the battery experiences thermal runaway, high-temperature gas can be discharged through the pressure relief channel 3 to relieve the pressure on the battery.

[0053] In some embodiments, referring to Figures 2, 4, 5 and 6, the support component 5 is connected to the base plate 12 of the base 1 and protrudes from the base plate 12, and the bracket 2 is connected to the end of the support component 5 away from the base plate 12. The support component 5 is configured to support the bracket 2 so that a pressure relief channel 3 is formed between the bracket 2 and the base plate 12.

[0054] Understandably, the support component 5 provides support for the bracket 2, effectively supporting it and preventing deformation or displacement of the bracket 2 relative to the base 1, thus improving the installation and structural stability of the bracket 2. Simultaneously, the support component 5 separates the bracket 2 from the base 1, creating a pressure relief channel 3 between them. When the battery experiences thermal runaway, high-temperature gas can be released through the pressure relief channel 3, thus relieving pressure on the battery.

[0055] It is understandable that the bracket 2 is designed to mount the battery cell 6, meaning that the bracket 2 will be subject to the gravity of the battery cell 6. In related technologies, the bracket 2 is directly connected to the base 1. Under the gravity of the battery cell 6, the bracket 2 is prone to deformation towards the pressure relief channel 3, which can lead to the pressure relief channel 3 being compressed, thus affecting the pressure relief speed. When the battery experiences thermal runaway, the high-temperature gases generated by the battery may be difficult to release quickly. This application utilizes the support component 5 to support the bracket 2. The gravity of the battery cell 6 can be transferred to the support component 5, effectively preventing the bracket 2 from deforming under the gravity of the battery cell 6. This avoids affecting the pressure relief channel 3, ensuring that when the battery experiences thermal runaway, the high-temperature gases can be quickly released through the pressure relief channel 3, thus ensuring battery safety.

[0056] In some embodiments, referring to Figures 2, 4, 5 and 6, the support component 5 includes a plurality of support ribs 51 arranged side by side, the first end of the support rib 51 being fixedly connected to the base plate 12, and the second end of the support rib 51 abutting against the bracket 2.

[0057] It is understandable that the support rib 51 is fixedly connected to the base plate 12, and the bracket 2 abuts against the end of the support rib 51 away from the base plate 12, so that the support rib 51 can support the base plate 12, and at the same time, a pressure relief channel 3 is formed between the bracket 2 and the base plate 12.

[0058] It is understandable that if multiple support ribs 51 are arranged side by side, the multiple support ribs 51 can divide the space between the bracket 2 and the base plate 12 into multiple subspaces, that is, the multiple support ribs 51 can make multiple pressure relief channels 3 form between the bracket 2 and the base plate 12.

[0059] In some embodiments, referring to FIG12, the base 1, the bracket 2, and each pair of adjacent support ribs 51 form a pressure relief channel 3.

[0060] It is understandable that if two adjacent support ribs 51 are arranged opposite each other, then each pair of adjacent support ribs 51, base 1 and bracket 2 can form a pressure relief channel 3. If there are multiple support ribs 51, then multiple pressure relief channels 3 can be formed between base 1 and bracket 2.

[0061] In some examples, multiple rows of battery cells 6 are installed on the side of the bracket 2 opposite to the pressure relief channel 3. Each row of battery cells 6 corresponds one-to-one with a pressure relief channel 3, meaning each row of battery cells 6 has a corresponding pressure relief channel 3. When different pressure relief channels 3 are not interconnected, if thermal runaway occurs in one row of battery cells 6, the high-temperature gas will not flow to the pressure relief channels 3 of other rows of battery cells 6, reducing the impact on other rows of battery cells 6. When different pressure relief channels 3 are interconnected, if thermal runaway occurs in one row of battery cells 6, the high-temperature gas can be discharged through all pressure relief channels 3, increasing the pressure relief rate.

[0062] In some embodiments, the multiple support ribs 51 are evenly spaced, so that the support provided by the multiple support ribs 51 to the bracket 2 is also uniform, and the consistency of different pressure relief channels 3 is improved.

[0063] In some embodiments, the support rib 51 is sealed to the bracket 2.

[0064] Understandably, the sealed connection between the support rib 51 and the bracket 2 improves the sealing performance between them, preventing the high-temperature gas generated by the thermal runaway of the battery cell 6 from flowing to other locations through the connection between the support rib 51 and the bracket 2, thus ensuring that the high-temperature gas flows along the pressure relief channel 3.

[0065] In some embodiments, at least a portion of the support rib 51 forms a connecting channel, and the connecting channel of the support rib 51 is configured to connect two adjacent pressure relief channels 3.

[0066] It is understandable that the bracket 2 is configured to install the battery cell 6. When the battery cell 6 corresponding to one of the two interconnected pressure relief channels 3 experiences thermal runaway, the high-temperature gas generated by the thermal runaway can be discharged through at least two pressure relief channels 3, thereby increasing the pressure relief speed.

[0067] In some embodiments, the connection channel includes a through hole or connection notch formed in the support rib.

[0068] In some embodiments, the support component 5 is integrally formed with the base 1, thereby improving the connection strength between the support component 5 and the base 1 and ensuring the sealing performance at the connection between the support component 5 and the base 1.

[0069] In some embodiments, referring to Figures 2, 4, 5 and 6, the support component 5 has a snap-fit ​​notch 52, and the sealing part 4 passes through the snap-fit ​​notch 52 and is inserted into the sealing groove 11.

[0070] It is understandable that by forming a snap-fit ​​notch 52 at the support component 5, the support component 5 is prevented from obstructing the sealing part 4, so that the sealing part 4 can pass through the snap-fit ​​notch 52 and be inserted into the sealing groove 11.

[0071] In some examples, the sealing part 4 is sealed to the wall of the snap-fit ​​notch 52 to improve the sealing performance between the sealing part 4 and the support assembly 5, and to prevent high-temperature gas generated during battery thermal runaway from flowing to the electrical equipment through the connection between the sealing part 4 and the support assembly 5.

[0072] In some embodiments, referring to Figures 7 and 8, the bracket 2 includes a first side and a second side disposed opposite to each other. The first side of the bracket 2 and the base 1 form a pressure relief channel 3. The bracket 2 is formed with a mounting boss 21, which protrudes from the second side of the bracket 2. The mounting boss 21 is formed with an explosion-proof structure 211. The structural strength of the explosion-proof structure 211 is less than the structural strength of other parts of the mounting boss 21. The mounting boss 21 is configured to mount the battery cell 6. The explosion-proof structure 211 is disposed opposite to the explosion-proof valve of the battery cell.

[0073] It is understandable that by forming an explosion-proof structure 211 on the mounting boss 21, when the battery cell 6 experiences thermal runaway, since the structural strength of the explosion-proof structure 211 is less than the structural strength of other parts of the mounting boss 21, the high-temperature gas generated by the battery cell 6 can cause the explosion-proof structure 211 to break, allowing the high-temperature gas to flow into the pressure relief channel 3, so as to realize the discharge of high-temperature gas through the pressure relief channel 3 and realize the pressure relief of the battery.

[0074] It is understandable that the mounting boss 21 protrudes from the second side of the bracket 2. If the battery cell 6 is installed on the mounting boss 21, the battery cell 6 will also protrude from the second side of the bracket 2, thereby increasing the distance between the battery cell 6 and the pressure relief channel 3.

[0075] It is understandable that the explosion-proof structure 211 is positioned opposite to the explosion-proof valve of the battery cell, so that the high-temperature gas generated by the uncontrolled failure of the battery cell 6 can impact the explosion-proof structure 211.

[0076] Referring to Figures 7 and 8, an exhaust chamber 212 is formed on the side of the mounting boss 21 away from the battery cell 6, and the exhaust chamber 212 is connected to the pressure relief channel 3.

[0077] It is understandable that when cell 6 experiences thermal runaway, the high-temperature gas generated by cell 6 can flow into the pressure relief channel 3 through the exhaust chamber 212 after causing the explosion-proof structure 211 to break.

[0078] It is understandable that the mounting boss 21 protrudes from the second side of the bracket 2, and by forming an exhaust chamber 212 with the pressure relief channel 3 on the mounting boss 21, the total amount of gas that can be contained in the space between the bracket 2 and the base 1 is increased.

[0079] In some embodiments, the explosion-proof structure 211 is at least partially aligned with the pressure relief channel 3.

[0080] It is understandable that when cell 6 experiences thermal runaway, the high-temperature gas generated by cell 6 causes the explosion-proof structure 211 to break, allowing the high-temperature gas to flow into the pressure relief channel 3. By setting at least a portion of the explosion-proof structure 211 to face the pressure relief channel 3, at least a portion of the high-temperature gas generated by cell 6 can flow directly into the pressure relief channel 3, ensuring the high-temperature gas emission rate and thus ensuring the battery pressure relief rate.

[0081] In some embodiments, referring to FIG8, the explosion-proof structure 211 includes a first weak portion 215 and a second weak portion 216, the first weak portion 215 being located on the first side of the bracket 2 and the second weak portion 216 being located on the second side of the bracket 2.

[0082] It is understandable that by forming a first weak part 215 and a second weak part 216 on the mounting boss 21, when the battery cell 6 experiences thermal runaway, since the structural strength of the first weak part 215 and the second weak part 216 is less than the structural strength of other parts of the mounting boss 21, the high-temperature gas generated by the battery cell 6 can cause the first weak part 215 and the second weak part 216 to break, allowing the high-temperature gas to flow into the pressure relief channel 3, so as to realize the discharge of high-temperature gas through the pressure relief channel 3 and realize the pressure relief of the battery.

[0083] It is understandable that the first weak part 215 and the second weak part 216 are respectively set on both sides of the mounting boss 21, so that when the battery cell 6 experiences thermal runaway, the high-temperature gas generated by the battery cell 6 will cause the weak parts on both sides of the mounting boss 21 to break, which is conducive to the high-temperature gas breaking through the explosion-proof structure.

[0084] In some embodiments, along the direction from the second side of the bracket 2 to the first side of the bracket 2, the second weak portion 216 in the orthographic projection of the base is located within the orthographic projection of the first weak portion 215 in the base.

[0085] Understandably, the second weak point 216 is located in the middle of the explosion-proof structure, while the second weak point 216 is located at the edge of the explosion-proof structure. When the battery cell 6 experiences thermal runaway, the high-temperature gas generated will impact the second weak point 216, causing it to fracture. Then, the first weak point 215 will also fracture. In other words, when the battery cell 6 experiences thermal runaway, the second weak point 216, located in the middle, will be ruptured first by the high-temperature gas. Then, under the impact of the high-temperature gas and the influence of the second weak point 216, the first weak point 215 will also fracture, facilitating the high-temperature gas's penetration of the explosion-proof structure.

[0086] In some embodiments, referring to Figures 7 and 8, the second weak portion 216 includes an explosion-proof groove 2111, the opening of which faces away from the pressure relief channel 3.

[0087] It is understandable that the thickness of the explosion-proof groove 2111 is relatively thin, and the opening of the explosion-proof groove 2111 faces the battery cell 6. When the battery cell 6 experiences thermal runaway, the high-temperature gas generated by the battery cell 6 will flow directly to the explosion-proof groove 2111 and impact the explosion-proof groove 2111, causing the explosion-proof groove 2111 to break. This allows the high-temperature gas to flow into the pressure relief channel 3 to achieve pressure relief.

[0088] It is understandable that since the opening of the explosion-proof groove 2111 faces away from the pressure relief channel 3, when the battery cell 6 experiences thermal runaway, the explosion-proof groove 2111 can accumulate the gas generated by the battery cell 6, causing the gas pressure at the explosion-proof groove 2111 to rise, which in turn facilitates the high-temperature gas generated when the battery cell 6 experiences thermal runaway to break through the explosion-proof groove 2111.

[0089] In some embodiments, referring to Figures 7 and 8, the mounting boss 21 includes a protrusion 213 and a receiving portion 214. The protrusion 213 protrudes from the second side of the bracket 2, and the receiving portion 214 is connected to the protrusion 213. The first weak portion 215 includes an explosion-proof notch 2112 formed at the connection between the receiving portion 214 and the protrusion 213. The opening of the explosion-proof notch 2112 faces the pressure relief channel 3.

[0090] It is understandable that the thickness at the explosion-proof notch 2112 is relatively thin. When the mounting boss 21 is impacted by the high-temperature gas generated by the thermal runaway of the battery cell 6, the explosion-proof notch 2112 will break, causing the receiving part 214 to separate from the protrusion 213, and the high-temperature gas can flow into the pressure relief channel 3 to achieve pressure relief.

[0091] When the receiving part 214 is impacted by high-temperature gas, the explosion-proof notch 2112 is subjected to a force toward the pressure relief channel 3. Since the opening of the explosion-proof notch 2112 faces the pressure relief channel 3, the explosion-proof notch 2112 is more likely to break.

[0092] It is understandable that since the diameter of the battery cell 6 is greater than or equal to the diameter of the mounting boss 21, the protrusion 213 will contact the battery cell 6 and support it. When the explosion-proof notch 2112 breaks and the receiving part 214 separates from the protrusion 213, the battery cell 6 will not fall into the pressure relief channel 3 under the support of the protrusion 213.

[0093] In some embodiments, the cross-sectional area of ​​the explosion-proof notch 2112 gradually increases along the direction from the battery cell 6 to the pressure relief channel 3, which is beneficial for the explosion-proof notch 2112 to break when the receiving part 214 is impacted by high-temperature gas.

[0094] In some embodiments, referring to FIG4, the bracket 2 is formed with an extension 22 that extends toward the side wall of the base 1, and the side wall of the base 1 is formed with a support 13. The extension 22 abuts against the side of the support 13 opposite to the bottom wall of the base 1.

[0095] Understandably, the support portion 13 can support the extension portion 22, thereby improving the installation stability of the bracket 2.

[0096] In some embodiments, referring to FIG4, the bracket 2 includes a first side and a second side disposed opposite to each other. The first side of the bracket 2 and the base 1 form a pressure relief channel, and the second side of the bracket 2 is configured to install battery cells.

[0097] The bracket 2 has an insulating partition plate 23, which protrudes from the second side of the bracket 2 and is configured to separate the battery cell and the base 1.

[0098] Understandably, the insulating partition 23 can prevent direct contact between the battery cell and the base 1, thus improving the insulation of the battery box.

[0099] The embodiments of this application also disclose a battery. Referring to Figures 9, 10, 13, 14 and 15, the battery includes a cell 6 and the aforementioned battery box. The cell 6 is mounted on the side of the bracket 2 away from the pressure relief channel 3.

[0100] According to the battery embodiment of this application, the bracket 2 and the base 1 are connected together, forming a pressure relief channel 3. When the battery experiences thermal runaway, high-temperature gas can be discharged through the pressure relief channel 3, thus relieving pressure on the battery. Simultaneously, one end of the pressure relief channel 3 is blocked by the sealing part 4, making the pressure relief channel 3 only open at one end. This ensures that the pressure relief channel 3 is a unidirectional pressure relief channel, preventing the high-temperature gas generated during battery thermal runaway from flowing in only one direction. In other words, this application makes the pressure relief channel 3 unidirectional by using the sealing part 4. By placing the electrical equipment on the side of the sealing part 4 away from the pressure relief channel 3, the high-temperature gas generated during battery thermal runaway can be effectively prevented from spreading to the location of the electrical equipment, reducing the impact of battery thermal runaway on the electrical equipment.

[0101] This application seals one end of the pressure relief channel 3 by using the sealing part 4, so that the high-temperature gas generated during battery thermal runaway cannot flow to both ends of the pressure relief channel 3 at the same time. Then, the electrical equipment is placed on the side of the sealing part 4 away from the pressure relief channel 3, and the high-temperature gas will flow away from the electrical equipment, which can prevent the high-temperature gas from spreading to the location of the electrical equipment and effectively reduce the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0102] In some embodiments, referring to Figures 11 and 12, the battery cell 6 is spaced apart from the base 1, and a foaming agent is filled between the battery cell 6 and the base 1.

[0103] It is understandable that the battery cell 6 and the base 1 are spaced apart, that is, there is a gap between the battery cell 6 and the base 1, so that foaming agent can be filled between the battery cell 6 and the base 1 to achieve fixation.

[0104] In some embodiments, two adjacent battery cells 6 are spaced apart, and a foaming agent is filled between the two adjacent battery cells 6.

[0105] It is understandable that, referring to Figures 11 and 12, adjacent cells 6 are spaced apart, that is, there is a gap between adjacent cells 6, so that foaming agent can be filled between adjacent cells 6 to achieve fixation.

[0106] In some embodiments, the battery cell 6 and the support 2 are spaced apart, and the space between the battery cell 6 and the support is filled with a foaming agent.

[0107] It is understandable that the battery cell 6 and the bracket 2 are spaced apart, that is, there is a gap between the battery cell 6 and the bracket 2, so that foaming agent can be filled between the battery cell 6 and the bracket 2 to achieve fixation.

[0108] In some embodiments, the battery further includes electrical components disposed on the side of the sealing portion 4 opposite to the pressure relief channel 3.

[0109] It is understandable that by placing the electrical components on the side of the sealing part 4 away from the pressure relief channel 3, the sealing part 4 blocks one end of the pressure relief channel 3, preventing the high-temperature gas generated during battery thermal runaway from flowing to both ends of the pressure relief channel 3 simultaneously. The high-temperature gas will flow away from the electrical equipment, thus preventing the high-temperature gas from spreading to the location of the electrical equipment and effectively reducing the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0110] Embodiments of this application also disclose an electrical device, which includes the battery described above.

[0111] According to the embodiments of this application, the electrical equipment connects the bracket 2 and the base 1 together, forming a pressure relief channel 3. When the battery experiences thermal runaway, high-temperature gas can be discharged through the pressure relief channel 3, thus relieving pressure on the battery. Simultaneously, the sealing part 4 blocks one end of the pressure relief channel 3, making it a one-way pressure relief channel 3. This ensures that the high-temperature gas generated during battery thermal runaway can only flow in one direction along the pressure relief channel 3, preventing bidirectional flow. In other words, this application makes the pressure relief channel 3 one-way by using the sealing part 4. By placing the electrical equipment on the side of the sealing part 4 away from the pressure relief channel 3, the spread of high-temperature gas generated during battery thermal runaway to the location of the electrical equipment can be effectively prevented, reducing the impact of battery thermal runaway on the electrical equipment.

[0112] This application seals one end of the pressure relief channel 3 by sealing the sealing part 4, so that the high-temperature gas generated during battery thermal runaway cannot flow to both ends of the pressure relief channel 3 at the same time. Then, the electrical equipment is placed on the side of the sealing part 4 away from the pressure relief channel 3, and the high-temperature gas will flow away from the electrical equipment, which can prevent the high-temperature gas from spreading to the location of the electrical equipment and effectively reduce the impact of the high-temperature gas generated during battery thermal runaway on the electrical equipment.

[0113] It should be noted that electrical equipment can be vehicles, energy storage power sources, consumer electronics, medical devices, smart cities, aircraft, or household appliances. It is important to note that the above are merely illustrative examples of electrical equipment and do not impose any specific limitations on the types of equipment used.

Claims

1. A battery box, comprising: Base; A bracket is connected to the base, and the bracket and the base together form a pressure relief channel; One of the bracket and the base has a sealing part located at one end of the pressure relief channel, and the other of the bracket and the base is sealed to the sealing part to seal one end of the pressure relief channel.

2. The battery box according to claim 1, wherein, Both the bracket and the base have the sealing portion, and the sealing portion of the bracket is sealed to the sealing portion of the base.

3. The battery pack of claim 1, wherein, The sealing portion of the bracket is sealed to the base, and / or the sealing portion of the base is sealed to the bracket.

4. The battery box according to claim 1, wherein, The base has a sealing groove, and the sealing part is inserted into the sealing groove.

5. The battery box according to claim 4, wherein, The battery box also includes a seal, which is disposed between the sealing part and the groove wall of the sealing groove.

6. The battery box according to claim 1, wherein, The sealing part is fixedly connected to the base by welding.

7. The battery box according to claim 4, wherein, The battery box also includes a support assembly connected between the bracket and the base. The support assembly, the bracket, and the base form the pressure relief channel, and the extension direction of the pressure relief channel is the same as the extension direction of the support assembly.

8. The battery box according to claim 7, wherein, The support assembly is connected to the base plate of the base and protrudes from the base plate. The bracket is connected to the end of the support assembly away from the base plate. The support assembly is configured to support the bracket so that the pressure relief channel is formed between the bracket and the base plate.

9. The battery box according to claim 7, wherein, The support component has a snap-fit ​​notch, and the sealing part passes through the snap-fit ​​notch and is inserted into the sealing groove.

10. The battery box according to any one of claims 1 to 9, wherein, The bracket includes a first side and a second side arranged opposite to each other. The first side of the bracket and the base form the pressure relief channel. The bracket has a mounting boss that protrudes from the second side of the bracket. The mounting boss has an explosion-proof structure. The structural strength of the explosion-proof structure is less than the structural strength of other parts of the mounting boss. The mounting boss is configured to mount a battery cell. The explosion-proof structure is arranged opposite to the explosion-proof valve of the battery cell.

11. The battery box according to claim 10, wherein, The explosion-proof structure is at least partially aligned with the pressure relief channel.

12. The battery pack of claim 10, wherein, The mounting boss has an exhaust chamber on the side opposite to the battery cell, and the exhaust chamber is connected to the pressure relief channel.

13. The battery pack of claim 10, wherein, The explosion-proof structure includes a first weak part and a second weak part, wherein the first weak part is located on the first side of the bracket and the second weak part is located on the second side of the bracket.

14. The battery pack of claim 13, wherein, Along the direction from the second side of the bracket to the first side of the bracket, the second weak portion is located within the orthographic projection of the first weak portion on the base.

15. The battery pack of claim 13, wherein, The second weak point includes an explosion-proof groove, the opening of which faces away from the pressure relief channel.

16. The battery pack of claim 13, wherein, The mounting boss includes a protrusion and a receiving portion. The protrusion protrudes from the second side of the bracket, and the receiving portion is connected to the protrusion. The first weak portion includes an explosion-proof notch formed at the connection between the receiving portion and the protrusion. The opening of the explosion-proof notch faces the pressure relief channel.

17. The battery pack of claim 16, wherein, Along the direction from the battery cell to the pressure relief channel, the cross-sectional area of ​​the explosion-proof notch gradually increases.

18. The battery box according to any one of claims 1 to 9, wherein, The bracket has an extension that extends toward the side wall of the base, and the side wall of the base has a support portion. The extension abuts against the support portion on the side opposite to the bottom wall of the base.

19. The battery box according to any one of claims 1 to 9, wherein, The bracket includes a first side and a second side arranged opposite to each other. The first side of the bracket and the base form the pressure relief channel, and the second side of the bracket is configured to install battery cells. The bracket has an insulating partition plate that protrudes from a second side of the bracket and is configured to separate the battery cell from the base.

20. The battery box of any one of claims 1 to 9, wherein, The battery box also includes a support assembly, which is connected to the base plate of the base and protrudes from the base plate; The bracket is connected to the end of the support assembly away from the base plate, and the support assembly is configured to support the bracket so that a pressure relief channel is formed between the bracket and the base plate.

21. The battery pack of claim 20, wherein, The support assembly includes a plurality of support ribs arranged side by side, the first end of the support ribs being fixedly connected to the base plate, and the second end of the support ribs abutting against the bracket.

22. The battery pack of claim 21, wherein, The base, the bracket, and every two adjacent support ribs form the pressure relief channel; and / or, The plurality of the aforementioned support ribs are evenly spaced; and / or, The supporting rib is sealed to the bracket.

23. The battery pack of claim 21, wherein, At least a portion of the supporting ribs form connecting channels, which are configured to connect two adjacent pressure relief channels.

24. The battery pack of claim 23, wherein, The connection channel includes a through hole or connection notch formed in the support rib.

25. The battery pack of claim 20, wherein, The support component is integrally formed with the base.

26. A battery comprising a cell and a battery case as claimed in any one of claims 1 to 25, wherein the cell is mounted on the side of the bracket opposite to the pressure relief channel.

27. The battery of claim 26, wherein, The battery cell is spaced apart from the base, and a foaming agent is filled between the battery cell and the base; and / or, Adjacent battery cells are spaced apart, and a foaming agent is filled between adjacent battery cells; and / or, The battery cell and the bracket are spaced apart, and the space between the battery cell and the bracket is filled with a foaming agent.

28. The battery of claim 26 or 27, wherein, The battery also includes electrical components located on the side of the sealing portion opposite to the pressure relief channel.

29. An electrical appliance comprising a battery as described in any one of claims 26 to 28.

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