Battery box, battery and electric equipment

Abstract

The invention provides a battery box, a battery and electric equipment. The battery box comprises a base and a support, the support is connected to the base, a pressure relief channel is defined by the support and the base, one of the support and the base is provided with a blocking part, the blocking part is located at one end of the pressure relief channel, and the other one of the support and the base is connected with the blocking part in a sealed mode to block one end of the pressure relief channel. According to the battery box, the pressure relief channel is changed into one-way pressure relief through the plugging part, and the electrical equipment is arranged on the side, deviating from the pressure relief channel, of the plugging part, so that high-temperature gas generated during thermal runaway of the battery can be effectively prevented from spreading to the position of the electrical equipment, and the influence on the electrical equipment during thermal runaway of the battery is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box, a battery and an electrical device. Background Art

[0002] Batteries are widely used in energy storage systems, transportation, consumer electronics and other fields. Thermal runaway refers to the phenomenon that during the operation of the battery, the chemical reaction is accelerated due to the increase in internal temperature, which leads to further increase in temperature, thus forming a self-reinforcing feedback loop, which may eventually lead to battery overheating, smoking, burning or even explosion.

[0003] In the related art, the high-temperature gas generated when the battery thermally runs away can easily spread to the location of the electrical equipment, causing a great impact on the electrical equipment. Summary of the invention

[0004] The embodiments of the present application provide a battery box, a battery, and an electrical device, which can improve the technical problem that the electrical device is easily affected by the high-temperature gas generated when the battery has thermal runaway.

[0005] In a first aspect, an embodiment of the present application provides a battery box, comprising:

[0006] Base;

[0007] A bracket connected to the base, wherein the bracket and the base are arranged to form a pressure relief channel;

[0008] One of the bracket and the base has a blocking portion, which is located at one end of the pressure relief channel, and the other of the bracket and the base is sealed and connected to the blocking portion to block one end of the pressure relief channel.

[0009] In one embodiment, both the bracket and the base have the blocking portion, and the blocking portion of the bracket is sealingly connected to the blocking portion of the base.

[0010] In one embodiment, the blocking portion of the bracket is sealed to the base, and / or the blocking portion of the base is sealed to the bracket.

[0011] In one embodiment, a sealing groove is formed on the base, and the blocking portion is inserted into the sealing groove.

[0012] In one embodiment, the battery box further includes a sealing member, and the sealing member is disposed between the sealing portion and a groove wall of the sealing groove.

[0013] In one embodiment, the sealing portion is fixedly connected to the base by welding.

[0014] In one embodiment, the battery box further includes a support assembly, wherein the support assembly is connected between the bracket and the base, and the support assembly, the bracket and the base surround and form the pressure relief channel, and an extension direction of the pressure relief channel is the same as an extension direction of the support assembly.

[0015] In one embodiment, the support assembly is connected to the bottom plate of the base and protrudes from the bottom plate, the bracket is connected to one end of the support assembly facing away from the bottom plate, and the support assembly is used to support the bracket so that the pressure relief channel is formed between the bracket and the bottom plate.

[0016] In one embodiment, the support assembly is formed with a snap-fitting notch, and the blocking portion is passed through the snap-fitting notch and inserted into the sealing groove.

[0017] In one embodiment, the bracket includes a first side and a second side that are oppositely arranged, the first side of the bracket and the base are arranged to form the pressure relief channel, the bracket is formed with a mounting boss, the mounting boss protrudes from the second side of the bracket, the mounting boss is formed with 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 used to install the battery cell, and the explosion-proof structure is arranged opposite to the explosion-proof valve of the battery cell.

[0018] In one embodiment, the explosion-proof structure is at least partially opposite to the pressure relief channel.

[0019] In one embodiment, a vent cavity is formed on a side of the mounting boss facing away from the battery core, and the vent cavity is communicated with the pressure relief channel.

[0020] In one embodiment, the explosion-proof structure includes a first weak portion and a second weak portion, wherein the first weak portion is located on a first side of the bracket, and the second weak portion is located on a second side of the bracket.

[0021] In one embodiment, along the direction from the second side of the bracket to the first side of the bracket, the orthographic projection of the second weak portion on the base is located within the orthographic projection of the first weak portion on the base.

[0022] In one embodiment, the second weak portion comprises an explosion-proof groove, and a notch of the explosion-proof groove faces a side away from the pressure relief channel.

[0023] In one embodiment, the mounting boss includes a protruding portion and a receiving portion, the protruding portion protrudes from the second side of the bracket, the receiving portion is connected to the protruding portion, and the first weak portion includes an explosion-proof notch formed at the connection between the receiving portion and the protruding portion, and the opening of the explosion-proof notch faces one side of the pressure relief channel.

[0024] In one embodiment, along the direction from the battery core to the pressure relief channel, the cross-sectional area of ​​the explosion-proof notch gradually increases.

[0025] In one embodiment, the bracket is formed with an extension portion, the extension portion extends toward the side wall of the base, the side wall of the base is formed with a support portion, and the extension portion abuts against a side of the bottom wall of the base away from the support portion.

[0026] In one embodiment, the bracket includes a first side and a second side that are arranged opposite to each other, the first side of the bracket and the base are surrounded to form the pressure relief channel, and the second side of the bracket is used to install the battery cell;

[0027] The support has an insulating partition plate, which protrudes from the second side of the support and is used to separate the battery core and the base.

[0028] In a second aspect, an embodiment of the present application provides a battery, comprising a battery cell and the above-mentioned battery box, wherein the battery cell is mounted on a side of the bracket away from the pressure relief channel.

[0029] In one embodiment, the battery core is spaced apart from the base, and a foaming agent is filled between the battery core and the base; and / or,

[0030] Two adjacent battery cells are spaced apart, and a foaming agent is filled between the two adjacent battery cells; and / or,

[0031] The battery core and the bracket are spaced apart, and a foaming agent is filled between the battery core and the bracket.

[0032] In one embodiment, the battery further includes an electrical component, and the electrical component is disposed on a side of the blocking portion facing away from the pressure relief channel.

[0033] In a third aspect, an embodiment of the present application provides an electrical device, comprising the battery described above.

[0034] Beneficial effects of the embodiments of the present application:

[0035] In an embodiment of the present application, the bracket and the base are connected together so that the bracket and the base are surrounded to form a pressure relief channel. When the battery has thermal runaway, the high-temperature gas can be discharged through the pressure relief channel to achieve pressure relief for the battery. At the same time, one end of the pressure relief channel is blocked by a blocking portion so that only one end of the pressure relief channel is conductive, that is, the pressure relief channel is a one-way pressure relief channel. The high-temperature gas generated when the battery has thermal runaway can only flow in one direction along the pressure relief channel, which can prevent the high-temperature gas from flowing in both directions along the pressure relief channel. In other words, the present application uses a blocking portion to make the pressure relief channel a one-way pressure relief, and sets the electrical equipment on the side of the blocking portion away from the pressure relief channel, which can effectively prevent the high-temperature gas generated when the battery has thermal runaway from spreading to the location of the electrical equipment, thereby reducing the impact of the battery thermal runaway on the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 It is one of the structural schematic diagrams of the battery box provided in the embodiment of the present application;

[0038] Figure 2 The embodiments of this application provide Figure 1 A schematic diagram of the structure enlargement at the center A;

[0039] Figure 3 This is the second structural schematic diagram of the battery box provided in the embodiment of the present application;

[0040] Figure 4 The embodiments of this application provide Figure 3 A schematic diagram of the structure enlarged at B in the middle;

[0041] Figure 5 is a schematic structural diagram of a base provided in an embodiment of the present application;

[0042] Figure 6 The embodiments of this application provide Figure 5 A schematic diagram of the structure enlarged at C in the middle;

[0043] Figure 7 is a schematic diagram of the structure of a bracket provided in an embodiment of the present application;

[0044] Figure 8 The embodiments of this application provide Figure 7 A schematic diagram of the structure at D in the middle is enlarged;

[0045] Fig. 9 It is one of the structural schematic diagrams of the battery provided in the embodiment of the present application;

[0046] Fig.10 The embodiments of this application provide Fig. 9 A schematic diagram of the structure enlarged at E in the middle;

[0047] Fig.11 This is the second structural schematic diagram of the battery provided in the embodiment of the present application;

[0048] Fig.12 The embodiments of this application provide Fig.11 A schematic diagram of the structure enlarged at F in the middle;

[0049] Fig.13 This is the third structural schematic diagram of the battery provided in the embodiment of the present application;

[0050] Fig.14 is a cross-sectional view of a battery provided in an embodiment of the present application;

[0051] Fig.15 The embodiments of this application provide Fig.14 Enlarged schematic diagram of the structure at G in the middle. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0053] Combine the following Figures 1 to 15 The battery box, battery and electrical equipment of the present application are described.

[0054] According to the embodiment of the first aspect of the present application, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The battery box includes a base 1 and a bracket 2, the bracket 2 is connected to the base 1, and the bracket 2 and the base 1 are surrounded to form a pressure relief channel 3.

[0055] One of the bracket 2 and the base 1 has a blocking portion 4 located at one end of the pressure relief channel 3 , and the other of the bracket 2 and the base 1 is sealedly connected to the blocking portion 4 to block one end of the pressure relief channel 3 .

[0056] According to the battery box of the embodiment of the present application, the bracket 2 and the base 1 are connected together so that the bracket 2 and the base 1 are surrounded to form a pressure relief channel 3. When the battery has thermal runaway, the high-temperature gas can be discharged through the pressure relief channel 3 to achieve pressure relief for the battery. At the same time, one end of the pressure relief channel 3 is blocked by the blocking portion 4 so that only one end of the pressure relief channel 3 is conductive, that is, the pressure relief channel 3 is a one-way pressure relief channel 3. The high-temperature gas generated when the battery has thermal runaway can only flow in one direction along the pressure relief channel 3, which can prevent the high-temperature gas from flowing in both directions along the pressure relief channel 3. In other words, the present application makes the pressure relief channel 3 a one-way pressure relief through the blocking portion 4, and sets the electrical equipment on the side of the blocking portion 4 away from the pressure relief channel 3, which can effectively prevent the high-temperature gas generated when the battery has thermal runaway from spreading to the location of the electrical equipment, thereby reducing the impact of the battery on the electrical equipment during thermal runaway.

[0057] It is understandable that in the related art, the pressure relief channel 3 is a two-way conductive structure, that is, the high-temperature gas can flow at both ends of the pressure relief channel 3, and no matter which side of the pressure relief channel 3 the electrical equipment is set, when the battery has thermal runaway, the high-temperature gas will spread to the location of the electrical equipment, thereby causing a greater impact on the electrical equipment, and even causing damage to the electrical equipment. However, the present application blocks one end of the pressure relief channel 3 by the blocking portion 4, so that the high-temperature gas generated when the battery is in thermal runaway cannot flow to both ends of the pressure relief channel 3 at the same time, and then the electrical equipment is set on the side of the blocking portion 4 away from the pressure relief channel 3, and the high-temperature gas will flow in the direction 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 when the battery is in thermal runaway on the electrical equipment.

[0058] In some examples, the base 1 is, for example, an aluminum profile base, and the bracket 2 is, for example, a plastic bracket.

[0059] 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 and connected to the sealing portion 4 of the base 1 .

[0060] It can be understood that the sealing portion 4 of the bracket 2 and the sealing portion 4 of the base 1 cooperate to block one end of the pressure relief channel 3, so that the pressure relief channel 3 becomes a one-way pressure relief channel 3, and then electrical equipment can be arranged on the side of the sealing portion 4 away from the pressure relief channel 3, which can prevent high-temperature gas from spreading to the location of the electrical equipment, effectively reducing the impact of high-temperature gas generated during thermal runaway of the battery on the electrical equipment.

[0061] It can be understood that the sealing portion 4 of the bracket 2 and the sealing portion 4 of the base 1 are sealed and connected, so that gas cannot pass through the connection between the sealing portion 4 of the bracket 2 and the sealing portion 4 of the base 1, thereby preventing the high-temperature gas generated during thermal runaway of the battery from flowing to the electrical equipment through the connection between the sealing portion 4 of the bracket 2 and the sealing portion 4 of the base 1.

[0062] In some embodiments, the sealing portion 4 of the bracket 2 is sealed to the base 1 .

[0063] It can be understood that the bracket 2 is formed with a sealing portion 4, and the sealing portion 4 cooperates with the base 1 to block one end of the pressure relief channel 3, so that the pressure relief channel 3 becomes a one-way pressure relief channel 3, and then the electrical equipment can be arranged on the side of the sealing portion 4 away from the pressure relief channel 3, 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 thermal runaway of the battery on the electrical equipment.

[0064] It can be understood that the sealing portion 4 of the bracket 2 is sealed and connected to the base 1, so that gas cannot pass through the connection between the sealing portion 4 of the bracket 2 and the base 1, thereby preventing the high-temperature gas generated during thermal runaway of the battery from flowing to the electrical equipment through the connection between the sealing portion 4 of the bracket 2 and the base 1.

[0065] In some embodiments, the sealing portion 4 of the base 1 is sealed to the bracket 2 .

[0066] It can be understood that the base 1 is formed with a sealing portion 4, and the sealing portion 4 cooperates with the bracket 2 to block one end of the pressure relief channel 3, so that the pressure relief channel 3 becomes a one-way pressure relief channel 3, and then the electrical equipment can be arranged on the side of the sealing portion 4 away from the pressure relief channel 3, 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 thermal runaway of the battery on the electrical equipment.

[0067] It can be understood that the sealing portion 4 of the base 1 is sealed and connected to the bracket 2, so that gas cannot pass through the connection between the sealing portion 4 of the base 1 and the bracket 2, thereby preventing the high-temperature gas generated during thermal runaway of the battery from flowing to the electrical equipment through the connection between the sealing portion 4 of the base 1 and the bracket 2.

[0068] In some embodiments, the blocking portion 4 of the bracket 2 is sealed and connected to the base 1 , and at the same time, the blocking portion 4 of the base 1 is sealed and connected to the bracket 2 .

[0069] It can be understood that both the bracket 2 and the base 1 are formed with a sealing portion 4, and the sealing portion 4 of the bracket 2 and the base 1 can seal one end of the pressure relief channel 3, and the sealing portion 4 of the base 1 and the bracket 2 can also seal one end of the pressure relief channel 3, thereby achieving double sealing of one end of the pressure relief channel 3 and ensuring the sealing effect of the pressure relief channel 3.

[0070] In some embodiments, see Figure 2 , Figure 4 , Figure 5 and Figure 6 The base 1 is formed with a sealing groove 11 , and the sealing portion 4 is inserted into the sealing groove 11 .

[0071] It can be understood that the sealing portion 4 is inserted into the sealing groove 11, and the sealing groove 11 can limit the sealing portion 4 to prevent the sealing portion 4 from shifting under the action of the high-temperature and high-pressure gas generated when the battery is thermally runaway, thereby improving the installation stability of the sealing portion 4, so that the sealing portion 4 can stably block the pressure relief channel 3, so that the high-temperature gas generated when the battery is thermally runaway cannot flow to both ends of the pressure relief channel 3 at the same time, and then the electrical equipment is set on the side of the sealing portion 4 away from the pressure relief channel 3, and the high-temperature gas will flow in the direction 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 when the battery is thermally runaway on the electrical equipment.

[0072] Specifically, the battery box further includes a sealing member, which is disposed between the sealing portion 4 and the groove wall of the sealing groove 11 .

[0073] It can be understood that the seal can improve the sealing performance between the sealing portion 4 and the groove wall of the sealing groove 11, prevent the gas from flowing from between the sealing portion 4 and the sealing groove 11 to the electrical equipment, and further prevent the high-temperature gas generated during thermal runaway of the battery from flowing through between the sealing portion 4 and the sealing groove 11 to the electrical equipment, and prevent the high-temperature gas from spreading to the location of the electrical equipment, thereby effectively reducing the impact of the high-temperature gas generated during thermal runaway of the battery on the electrical equipment.

[0074] In some embodiments, the sealing portion 4 is fixedly connected to the base 1 by welding.

[0075] It can be understood that the sealing portion 4 and the base 1 are fixedly connected by welding, thereby improving the connection stability between the sealing portion 4 and the base 1.

[0076] It can be understood that by fixing the sealing part 4 and the base 1 by welding, the sealing performance of the connection between the sealing part 4 and the base 1 can be improved, and the gas can be prevented from flowing from the connection between the sealing part 4 and the base 1 to the electrical equipment, thereby preventing the high-temperature gas generated during thermal runaway of the battery from flowing to the electrical equipment through the connection between the sealing part 4 and the base 1, and preventing the high-temperature gas from spreading to the location of the electrical equipment, thereby effectively reducing the impact of the high-temperature gas generated during thermal runaway of the battery on the electrical equipment.

[0077] In some embodiments, see Figure 2 , Figure 4 , Figure 5 and Figure 6 The battery box also includes a support assembly 5, which is connected between the bracket 2 and the base 1. The support assembly 5, the bracket 2 and the base 1 are arranged to 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 assembly 5.

[0078] It can be understood that the support assembly 5 separates the bracket 2 and the base 1, so that the support assembly 5, the bracket 2 and the base 1 can be surrounded to form a pressure relief channel 3. When the battery has thermal runaway, the high-temperature gas can be discharged through the pressure relief channel 3 to achieve pressure relief for the battery.

[0079] In some embodiments, see Figure 2 , Figure 4 , Figure 5 and Figure 6 The support assembly 5 is connected to the bottom plate 12 of the base 1 and protrudes from the bottom plate 12. The bracket 2 is connected to one end of the support assembly 5 away from the bottom plate 12. The support assembly 5 is used to support the bracket 2 so that a pressure relief channel 3 is formed between the bracket 2 and the bottom plate 12.

[0080] It is understandable that the support assembly 5 can support the bracket 2, realize effective support for the bracket 2, avoid deformation or displacement of the bracket 2 relative to the base 1, and improve the installation stability and structural stability of the bracket 2. At the same time, the support assembly 5 can separate the bracket 2 and the base 1, so that a pressure relief channel 3 is formed between the bracket 2 and the base 1. When the battery has thermal runaway, the high-temperature gas can be discharged through the pressure relief channel 3 to achieve pressure relief for the battery.

[0081] It is understandable that the bracket 2 is used to install the battery cell 6, that is, the bracket 2 will be affected by the gravity of the battery cell 6. In the related art, the bracket 2 is directly connected to the base 1. Under the gravity of the battery cell 6, the bracket 2 is easily deformed to the side of the pressure relief channel 3, which in turn causes the pressure relief channel 3 to be squeezed, resulting in the pressure relief speed being affected. When the battery thermally runs away, the high-temperature gas generated by the battery may be difficult to be quickly discharged. The present application uses the support assembly 5 to support the bracket 2. The gravity of the battery cell 6 can be transmitted to the support assembly 5, which can effectively prevent the bracket 2 from being deformed under the gravity of the battery cell 6, thereby avoiding the pressure relief channel 3 from being affected, ensuring that when the battery thermally runs away, the high-temperature gas can be quickly discharged through the pressure relief channel 3, thereby ensuring the safety of the battery.

[0082] In some embodiments, see Figure 2 , Figure 4 , Figure 5 and Figure 6 The support assembly 5 includes a plurality of support ribs 51 arranged side by side, a first end of the support rib 51 is fixedly connected to the bottom plate 12 , and a second end of the support rib 51 abuts against the bracket 2 .

[0083] It can be understood 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 facing away from the base plate 12, so that the support rib 51 can support the base plate 12 and at the same time form a pressure relief channel 3 between the bracket 2 and the base plate 12.

[0084] It is understandable that, when 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 form multiple pressure relief channels 3 between the bracket 2 and the base plate 12.

[0085] In some embodiments, see Fig.12 The base 1 , the bracket 2 and every two adjacent support ribs 51 are arranged to form a pressure relief channel 3 .

[0086] It can be understood that if two adjacent support ribs 51 are arranged relative to each other, then every two adjacent support ribs 51, the base 1 and the bracket 2 can surround and form a pressure relief channel 3, and if there are multiple support ribs 51, multiple pressure relief channels 3 can be formed between the base 1 and the bracket 2.

[0087] In some examples, multiple rows of battery cells 6 are installed on the side of the bracket 2 away from the pressure relief channel 3, and the multiple rows of battery cells 6 correspond to the multiple pressure relief channels 3 one by one, that is, each row of battery cells 6 has a corresponding pressure relief channel 3. When different pressure relief channels 3 are not connected to each other, when 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 connected to each other, when 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 speed.

[0088] In some embodiments, the plurality of support ribs 51 are evenly spaced, so that the support provided by the plurality of support ribs 51 to the bracket 2 is also even, and the consistency of different pressure relief channels 3 is improved at the same time.

[0089] In some embodiments, the support rib 51 is sealed and connected to the bracket 2 .

[0090] It can be understood that the support rib 51 and the bracket 2 are sealed and connected, which improves the sealing between the support rib 51 and the bracket 2, and can prevent the high-temperature gas generated by thermal runaway of the battery cell 6 from flowing to other positions through the connection between the support rib 51 and the bracket 2, thereby ensuring that the high-temperature gas flows along the pressure relief channel 3.

[0091] In some embodiments, at least a portion of the support ribs 51 is formed with a connecting channel, and the connecting channel of the support ribs 51 is used to connect two adjacent pressure relief channels 3 .

[0092] It can be understood that the bracket 2 is used to install the battery cell 6. When the battery cell 6 corresponding to one of the two interconnected pressure relief channels 3 undergoes 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.

[0093] In some embodiments, the connecting channel includes a through hole or a connecting notch formed in the supporting rib.

[0094] In some embodiments, the support assembly 5 and the base 1 are integrally formed, thereby improving the connection strength between the support assembly 5 and the base 1 and ensuring the sealing performance of the connection between the support assembly 5 and the base 1.

[0095] In some embodiments, see Figure 2 , Figure 4 , Figure 5 and Figure 6 The support assembly 5 is formed with a snap-fitting notch 52 , and the blocking portion 4 is passed through the snap-fitting notch 52 and inserted into the sealing groove 11 .

[0096] It is understandable that by forming the snap-fit ​​notch 52 at the support component 5 , the support component 5 is prevented from obstructing the sealing portion 4 , so that the sealing portion 4 can be inserted into the snap-fit ​​notch 52 and into the sealing groove 11 .

[0097] In some examples, the sealing portion 4 is sealed to the wall of the snap-fit ​​notch 52 to improve the sealing performance between the sealing portion 4 and the support assembly 5, and to prevent high-temperature gas generated during thermal runaway of the battery from flowing to the electrical equipment through the connection between the sealing portion 4 and the support assembly 5.

[0098] In some embodiments, see Figure 7 and Figure 8 The bracket 2 includes a first side and a second side that are arranged opposite to each other. The first side of the bracket 2 and the base 1 are arranged to form a pressure relief channel 3. The bracket 2 is formed with a mounting boss 21. The mounting boss 21 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 used to install the battery cell 6. The explosion-proof structure 211 is arranged opposite to the explosion-proof valve of the battery cell.

[0099] It can be understood that by forming an explosion-proof structure 211 on the mounting boss 21, when thermal runaway occurs in the battery cell 6, 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 discharge the high-temperature gas through the pressure relief channel 3 and achieve pressure relief of the battery.

[0100] It is understandable that the mounting boss 21 protrudes from the second side of the bracket 2 , and when the battery cell 6 is mounted 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 .

[0101] It can be understood that the explosion-proof structure 211 is arranged opposite to the explosion-proof valve of the battery cell, so that the high-temperature gas generated by the battery cell 6 out of control can impact the explosion-proof structure 211.

[0102] For details, see Figure 7 and Figure 8 A vent cavity 212 is formed on the side of the mounting boss 21 facing away from the battery core 6 , and the vent cavity 212 is communicated with the pressure relief channel 3 .

[0103] It is understandable that when the battery cell 6 experiences thermal runaway, the high-temperature gas generated by the battery cell 6 can flow into the pressure relief channel 3 through the exhaust cavity 212 after rupturing the explosion-proof structure 211 .

[0104] It can be understood that the mounting boss 21 protrudes from the second side of the bracket 2, and the exhaust cavity 212 connected to the pressure relief channel 3 is formed on the mounting boss 21, thereby increasing the total amount of gas that can be accommodated in the space between the bracket 2 and the base 1.

[0105] In some embodiments, the explosion-proof structure 211 is at least partially opposite to the pressure relief channel 3 .

[0106] It can be understood that when thermal runaway occurs in the battery cell 6, the high-temperature gas generated by the battery cell 6 causes the explosion-proof structure 211 to break, so that the high-temperature gas can flow into the pressure relief channel 3, and at least a portion of the explosion-proof structure 211 is set to be opposite to the pressure relief channel 3, so that at least a portion of the high-temperature gas generated by the battery cell 6 can directly flow into the pressure relief channel 3, thereby ensuring the high-temperature gas discharge speed and further ensuring the pressure relief speed of the battery.

[0107] In some embodiments, see Figure 8 The explosion-proof structure 211 includes a first weak portion 215 and a second weak portion 216 . The first weak portion 215 is located on a first side of the bracket 2 , and the second weak portion 216 is located on a second side of the bracket 2 .

[0108] It can be understood that by forming the first weak portion 215 and the second weak portion 216 on the mounting boss 21, when thermal runaway occurs in the battery cell 6, since the structural strength of the first weak portion 215 and the second weak portion 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 portion 215 and the second weak portion 216 to break, allowing the high-temperature gas to flow into the pressure relief channel 3, so as to realize the discharge of the high-temperature gas through the pressure relief channel 3 and realize the pressure relief of the battery.

[0109] It can be understood that the first weak portion 215 and the second weak portion 216 are respectively arranged on both sides of the mounting boss 21, so that when the battery cell 6 has thermal runaway, the high-temperature gas generated by the battery cell 6 will cause the weak portions on both sides of the mounting boss 21 to break, which is conducive to the high-temperature gas breaking through the explosion-proof structure.

[0110] In some embodiments, along the direction from the second side of the bracket 2 to the first side of the bracket 2 , the orthographic projection of the second weak portion 216 on the base is located within the orthographic projection of the first weak portion 215 on the base.

[0111] It is understandable that the second weak portion 216 is located in the middle of the explosion-proof structure, and the second weak portion 216 is located at the edge of the explosion-proof structure. The high-temperature gas generated when the battery cell 6 is in thermal runaway will impact the second weak portion 216, causing the second weak portion 216 to break, and then the first weak portion 215 will break. In other words, when the battery cell 6 is in thermal runaway, the second weak portion 216 located in the middle will be broken by the high-temperature gas first, and then under the impact of the high-temperature gas and the drive of the second weak portion 216, the first weak portion 215 will also break, making it easier for the high-temperature gas to break through the explosion-proof structure.

[0112] In some embodiments, see Figure 7 and Figure 8 The second weak portion 216 includes an explosion-proof groove 2111 , and the notch of the explosion-proof groove 2111 faces the side away from the pressure relief channel 3 .

[0113] It can be understood that the thickness of the explosion-proof groove 2111 is relatively thin, and the notch of the explosion-proof groove 2111 faces the battery cell 6. When the battery cell 6 has thermal runaway, the high-temperature gas generated by the battery cell 6 will directly flow to the explosion-proof groove 2111, causing an impact on the explosion-proof groove 2111, causing the explosion-proof groove 2111 to break, and then the high-temperature gas can flow into the pressure relief channel 3 to achieve pressure relief.

[0114] It can be understood that since the notch of the explosion-proof groove 2111 faces the side away from the pressure relief channel 3, when the battery cell 6 has thermal runaway, the explosion-proof groove 2111 can gather the gas generated by the battery cell 6, so that the air pressure at the explosion-proof groove 2111 increases, which is conducive to the high-temperature gas generated by the thermal runaway of the battery cell 6 to break through the explosion-proof groove 2111.

[0115] In some embodiments, see Figure 7 and Figure 8 The mounting boss 21 includes a protruding portion 213 and a receiving portion 214, the protruding portion 213 protrudes from the second side of the bracket 2, the receiving portion 214 is connected to the protruding portion 213, and the first weak portion 215 includes an explosion-proof notch 2112 formed at the connection between the receiving portion 214 and the protruding portion 213, and the opening of the explosion-proof notch 2112 faces the side of the pressure relief channel 3.

[0116] It is understandable that the thickness of the explosion-proof notch 2112 is relatively thin. When the mounting boss 21 is impacted by the high-temperature gas generated by thermal runaway of the battery cell 6, the explosion-proof notch 2112 will break, causing the receiving portion 214 to separate from the raised portion 213, and the high-temperature gas can flow into the pressure relief channel 3 to achieve pressure relief.

[0117] When the receiving portion 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 is toward the side of the pressure relief channel 3 , the explosion-proof notch 2112 is more likely to break.

[0118] It can be understood that since the diameter of the battery cell 6 is greater than or equal to the diameter of the mounting boss 21, that is, the protrusion 213 will contact the battery cell 6 and support the battery cell 6. When the explosion-proof notch 2112 breaks and the receiving portion 214 is separated from the protrusion 213, the battery cell 6 will not fall into the pressure relief channel 3 under the support of the protrusion 213.

[0119] In some embodiments, the cross-sectional area of ​​the explosion-proof notch 2112 gradually increases along the direction from the battery core 6 to the pressure relief channel 3, which is conducive to the rupture of the explosion-proof notch 2112 when the receiving portion 214 is impacted by high-temperature gas.

[0120] In some embodiments, see Figure 4 The bracket 2 is formed with an extension portion 22 , which extends toward the side wall of the base 1 . The side wall of the base 1 is formed with a support portion 13 . The extension portion 22 abuts against a side of the bottom wall of the base 1 which is away from the support portion 13 .

[0121] It can be understood that the support portion 13 can support the extension portion 22 , thereby improving the installation stability of the bracket 2 .

[0122] In some embodiments, see Figure 4 The bracket 2 includes a first side and a second side that are arranged opposite to each other, the first side of the bracket 2 and the base 1 are surrounded to form a pressure relief channel, and the second side of the bracket 2 is used to install the battery cell;

[0123] The support 2 has an insulating partition plate 23 , which protrudes from the second side of the support 2 . The insulating partition plate 23 is used to separate the battery cell and the base 1 .

[0124] It can be understood that the insulating partition plate 23 can prevent the battery cells from directly contacting the base 1, thereby improving the insulation of the battery box.

[0125] According to the embodiment of the second aspect of the present application, refer to Fig. 9 , Fig.10 , Fig.13 , Fig.14 and Fig.15The battery includes a battery cell 6 and the above-mentioned battery box, and the battery cell 6 is installed on a side of the bracket 2 away from the pressure relief channel 3.

[0126] According to the battery of the embodiment of the present application, the bracket 2 and the base 1 are connected together so that the bracket 2 and the base 1 are surrounded to form a pressure relief channel 3. When the battery has thermal runaway, the high-temperature gas can be discharged through the pressure relief channel 3 to achieve pressure relief for the battery. At the same time, one end of the pressure relief channel 3 is blocked by the blocking portion 4 so that only one end of the pressure relief channel 3 is conductive, that is, the pressure relief channel 3 is a one-way pressure relief channel 3. The high-temperature gas generated when the battery has thermal runaway can only flow in one direction along the pressure relief channel 3, which can prevent the high-temperature gas from flowing in both directions along the pressure relief channel 3. In other words, the present application makes the pressure relief channel 3 a one-way pressure relief through the blocking portion 4, and sets the electrical equipment on the side of the blocking portion 4 away from the pressure relief channel 3, which can effectively prevent the high-temperature gas generated when the battery has thermal runaway from spreading to the location of the electrical equipment, thereby reducing the impact of the battery on the electrical equipment during thermal runaway.

[0127] In the present application, one end of the pressure relief channel 3 is blocked by the blocking portion 4, so that the high-temperature gas generated during thermal runaway of the battery cannot flow to both ends of the pressure relief channel 3 at the same time. The electrical equipment is then arranged on the side of the blocking portion 4 away from the pressure relief channel 3. 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, effectively reducing the impact of the high-temperature gas generated during thermal runaway of the battery on the electrical equipment.

[0128] In some embodiments, see Fig.11 and Fig.12 The battery core 6 is spaced apart from the base 1 , and a foaming agent is filled between the battery core 6 and the base 1 .

[0129] It is understandable that the battery cell 6 and the base 1 are spaced apart, that is, a gap is formed between the battery cell 6 and the base 1, so as to facilitate filling of a foaming agent between the battery cell 6 and the base 1 to achieve fixation.

[0130] In some embodiments, two adjacent battery cells 6 are spaced apart, and a foaming agent is filled between the two adjacent battery cells 6 .

[0131] Understandably, see Fig.11 and Fig.12 , two adjacent battery cells 6 are arranged at intervals, that is, a gap is formed between the two adjacent battery cells 6, so that the foaming agent can be filled between the two adjacent battery cells 6 to achieve fixation.

[0132] In some embodiments, the battery cell 6 and the bracket 2 are spaced apart, and a foaming agent is filled between the battery cell 6 and the bracket.

[0133] It is understandable that the battery cell 6 and the bracket 2 are arranged at an interval, that is, a gap is formed between the battery cell 6 and the bracket 2, so as to facilitate filling of the foaming agent between the battery cell 6 and the bracket 2 to achieve fixation.

[0134] In some embodiments, the battery further includes an electrical component, which is disposed on a side of the blocking portion 4 facing away from the pressure relief channel 3 .

[0135] It can be understood that the electrical components are arranged on the side of the sealing portion 4 away from the pressure relief channel 3. Since the sealing portion 4 blocks one end of the pressure relief channel 3, the high-temperature gas generated during thermal runaway of the battery cannot flow to both ends of the pressure relief channel 3 at the same time. The high-temperature gas will flow in a direction away from the electrical equipment, which can prevent the high-temperature gas from spreading to the location of the electrical equipment, effectively reducing the impact of the high-temperature gas generated during thermal runaway of the battery on the electrical equipment.

[0136] According to an embodiment of the third aspect of the present application, the electrical device includes the above-mentioned battery.

[0137] According to the electrical equipment of the embodiment of the present application, the bracket 2 and the base 1 are connected together so that the bracket 2 and the base 1 are surrounded to form a pressure relief channel 3. When the battery has thermal runaway, the high-temperature gas can be discharged through the pressure relief channel 3 to achieve pressure relief for the battery. At the same time, one end of the pressure relief channel 3 is blocked by the blocking portion 4 so that only one end of the pressure relief channel 3 is conductive, that is, the pressure relief channel 3 is a one-way pressure relief channel 3. The high-temperature gas generated when the battery has thermal runaway can only flow in one direction along the pressure relief channel 3, which can prevent the high-temperature gas from flowing in both directions along the pressure relief channel 3. In other words, the present application makes the pressure relief channel 3 a one-way pressure relief through the blocking portion 4, and sets the electrical equipment on the side of the blocking portion 4 away from the pressure relief channel 3, which can effectively prevent the high-temperature gas generated when the battery has thermal runaway from spreading to the location of the electrical equipment, thereby reducing the impact of the battery thermal runaway on the electrical equipment.

[0138] The present application blocks one end of the pressure relief channel 3 by the sealing portion 4, so that the high-temperature gas generated during thermal runaway of the battery cannot flow to both ends of the pressure relief channel 3 at the same time, and then the electrical equipment is arranged on the side of the sealing portion 4 away from the pressure relief channel 3. The high-temperature gas will flow in a direction 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 thermal runaway of the battery on the electrical equipment.

[0139] It should be noted that the electrical equipment can be a vehicle, an energy storage power supply, a consumer electronic device, a medical device, a smart city, an aircraft, or a household appliance. It should be noted that the above is only an example of electrical equipment and does not specifically limit the electrical equipment.

[0140] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery box, characterized in that: include: Base; A bracket connected to the base, wherein the bracket and the base are arranged to form a pressure relief channel; One of the bracket and the base has a blocking portion, which is located at one end of the pressure relief channel, and the other of the bracket and the base is sealed and connected to the blocking portion to block one end of the pressure relief channel.

2. The battery box according to claim 1, characterized in that: The bracket and the base both have the blocking portion, and the blocking portion of the bracket is sealed and connected to the blocking portion of the base.

3. The battery box according to claim 1, characterized in that: The blocking portion of the bracket is sealed and connected to the base, and / or the blocking portion of the base is sealed and connected to the bracket.

4. The battery box according to claim 1, characterized in that: The base is formed with a sealing groove, and the blocking portion is inserted into the sealing groove.

5. The battery box according to claim 4, characterized in that: The battery box further comprises a sealing member, which is arranged between the sealing portion and a groove wall of the sealing groove.

6. The battery box according to claim 1, characterized in that: The blocking portion is fixedly connected to the base by welding.

7. The battery box according to claim 4, characterized in that: The battery box also includes a support assembly, which is connected between the bracket and the base. The support assembly, the bracket and the base are arranged to 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, characterized in that: The support assembly is connected to the bottom plate of the base and protrudes from the bottom plate. The bracket is connected to one end of the support assembly away from the bottom plate. The support assembly is used to support the bracket so that the pressure relief channel is formed between the bracket and the bottom plate.

9. The battery box according to claim 7, characterized in that: The support assembly is formed with a clamping notch, and the blocking portion is passed through the clamping notch and inserted into the sealing groove.

10. The battery box according to any one of claims 1 to 9, characterized in that: The bracket includes a first side and a second side that are arranged opposite to each other. The first side of the bracket and the base are arranged to form the pressure relief channel. The bracket is formed with a mounting boss, and the mounting boss protrudes from the second side of the bracket. The mounting boss is formed with 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 used to install a battery cell, and the explosion-proof structure is arranged opposite to the explosion-proof valve of the battery cell.

11. The battery box according to claim 10, characterized in that: The explosion-proof structure is at least partially opposite to the pressure relief channel.

12. The battery box according to claim 10, characterized in that: An exhaust cavity is formed on a side of the mounting boss away from the battery core, and the exhaust cavity is communicated with the pressure relief channel.

13. The battery box according to claim 10, characterized in that: The explosion-proof structure includes a first weak portion and a second weak portion, wherein the first weak portion is located on a first side of the bracket, and the second weak portion is located on a second side of the bracket.

14. The battery box according to claim 13, characterized in that: Along the direction from the second side of the bracket to the first side of the bracket, the orthographic projection of the second weak portion on the base is located within the orthographic projection of the first weak portion on the base.

15. The battery box according to claim 13, characterized in that: The second weak portion includes an explosion-proof groove, and a notch of the explosion-proof groove faces a side away from the pressure relief channel.

16. The battery box according to claim 13, characterized in that: The mounting boss includes a protruding portion and a receiving portion, the protruding portion protrudes from the second side of the bracket, the receiving portion is connected to the protruding portion, and the first weak portion includes an explosion-proof notch formed at the connection between the receiving portion and the protruding portion, and the opening of the explosion-proof notch faces one side of the pressure relief channel.

17. The battery box according to claim 16, characterized in that: Along the direction from the battery core 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, characterized in that: The bracket is formed with an extension portion, the extension portion extends toward the side wall of the base, the side wall of the base is formed with a support portion, and the extension portion abuts against a side of the bottom wall of the base that is away from the support portion.

19. The battery box according to any one of claims 1 to 9, characterized in that: The bracket comprises a first side and a second side which are arranged opposite to each other, the first side of the bracket and the base are arranged to form the pressure relief channel, and the second side of the bracket is used for installing the battery cell; The support has an insulating partition plate, which protrudes from the second side of the support and is used to separate the battery core and the base.

20. A battery, characterized in that: It comprises a battery cell and a battery box as described in any one of claims 1 to 19, wherein the battery cell is installed on a side of the bracket away from the pressure relief channel.

21. The battery according to claim 20, characterized in that The battery core is spaced apart from the base, and a foaming agent is filled between the battery core and the base; and / or, Two adjacent battery cells are spaced apart, and a foaming agent is filled between the two adjacent battery cells; and / or, The battery core and the bracket are spaced apart, and a foaming agent is filled between the battery core and the bracket.

22. The battery according to claim 20 or 21, characterized in that The battery further includes an electrical component, and the electrical component is arranged on a side of the blocking portion away from the pressure relief channel.

23. An electrical equipment, characterized in that: Comprising a battery as claimed in any one of claims 20 to 22.

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