Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack. The battery box comprises an electrical box body and a battery box body, the electrical box body is provided with an electrical cabin; the battery box body is provided with a battery bin and a battery pressure relief cavity, the battery box body comprises an edge beam assembly and an anti-explosion valve, the edge beam assembly is provided with an edge beam pressure relief cavity, the battery pressure relief cavity is communicated with the anti-explosion valve through the edge beam pressure relief cavity, and the electrical box body is connected to the edge beam assembly and used for sealing the edge beam pressure relief cavity. The utility model aims to solve the technical problems that the air tightness of the existing battery box is poor, and gas in the battery box body is easy to leak into an electrical box body.

Description

Technical Field

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

[0002] The battery pack consists of a battery case and an electrical enclosure. A pressure relief channel is required within the battery case to provide pressure relief, and this channel must be airtight. In related art, the battery case and electrical enclosure are integrally formed and then separated by a partition, leaving the battery case and electrical enclosure connected. This allows gas from the battery case to easily penetrate into the electrical enclosure, leading to uncontrolled pressure inside the battery pack and a potential explosion. Utility Model Content

[0003] The embodiments of the present utility model provide a battery box and a battery pack, which are intended to solve the technical problem that the existing battery box has poor air tightness and gas easily leaks into the electrical box.

[0004] In a first aspect, an embodiment of the present invention provides a battery box, comprising:

[0005] An electrical box body, provided with an electrical compartment; and

[0006] The battery box is provided with a battery compartment and a battery pressure relief chamber. The battery box includes a side beam assembly and an explosion-proof valve. The side beam assembly is provided with a side beam pressure relief chamber. The battery pressure relief chamber is connected to the explosion-proof valve through the side beam pressure relief chamber. The electrical box is connected to the side beam assembly and is used to seal the side beam pressure relief chamber.

[0007] In one embodiment, the side beam assembly includes two first side beams and a second side beam arranged opposite to each other, the second side beam is connected between the two first side beams, the two first side beams and the second side beam are jointly provided with the side beam pressure relief chamber, and the electrical box is connected to the ends of the two first side beams away from the second side beam and seals the side beam pressure relief chamber.

[0008] In one embodiment, both the first side beams and the second side beams include a first beam body and a second beam body, the first beam body is connected to a side of the second beam body close to the battery compartment, the top of the second beam body is higher than the top of the first beam body, wherein the first beam body is provided with the side beam pressure relief cavity.

[0009] In one embodiment, the second beam bodies of the two first side beams and the second beam bodies of the second side beams are both provided with a total cavity.

[0010] In one embodiment, the side beam assembly further includes a plurality of first partitions, which are spaced apart in the total cavity to divide the total cavity into a plurality of cavities.

[0011] In one embodiment, at least one of the first side beams is provided with a side beam pressure relief port, and the side beam pressure relief port is connected to the battery pressure relief cavity and the side beam pressure relief cavity.

[0012] In one embodiment, the bottom of the first beam body is higher than the bottom of the second beam body, and the side beam pressure relief port is provided at the bottom of the first beam body; or

[0013] The bottom of the first beam is higher than the bottom of the second beam, and the side beam pressure relief port is provided on a side of the second beam close to the first beam and below the first beam; or

[0014] The side beam pressure relief port is provided on the first beam body and is located on a side of the first beam body facing away from the second beam body.

[0015] In one embodiment, the explosion-proof valve is installed on the second beam body of the second side beam, and the first beam body of the second side beam is communicated with the second beam body of the second side beam.

[0016] In one embodiment, the electrical box includes a side panel, which is located between the electrical compartment and the battery compartment. The side panel is connected to the ends of the two first side beams of the battery box away from the second side beam and seals the side beam pressure relief cavity.

[0017] In one embodiment, the electrical box is a cast box, the battery box is a profile box, and the side panels are welded to the ends of the two first side beams of the battery box that are away from the second side beams.

[0018] In one embodiment, the side plate is formed with a plurality of openings, and the plurality of openings are configured to allow cooling pipes or connecting wire harnesses to pass through.

[0019] In a second aspect, an embodiment of the present invention provides a battery pack, including a battery box, wherein the battery box includes:

[0020] An electrical box body, provided with an electrical compartment; and

[0021] The battery box is provided with a battery compartment and a battery pressure relief chamber. The battery box includes a side beam assembly and an explosion-proof valve. The side beam assembly is provided with a side beam pressure relief chamber. The battery pressure relief chamber is connected to the explosion-proof valve through the side beam pressure relief chamber. The electrical box is connected to the side beam assembly and is used to seal the side beam pressure relief chamber.

[0022] Beneficial effects of the embodiments of the present utility model:

[0023] In the technical solution of the present invention, the electrical box is provided with an electrical compartment, and a plurality of electrical modules are provided in the electrical compartment. The battery box includes a battery compartment, and a plurality of battery cells are provided in the battery compartment. The electrical compartment and the battery compartment are two independent areas, and the battery compartment and the electrical compartment are not connected to each other. The gas in the battery pressure relief chamber will not penetrate into the electrical compartment, thereby ensuring the stability of the air pressure of the entire battery box and improving the safety of the battery box. At the same time, the electrical box is connected to the side beam assembly, and the electrical box can seal the side beam pressure relief chamber in the side beam assembly, thereby preventing the gas in the side beam pressure relief chamber from penetrating into the electrical compartment. At the same time, the electrical box is connected to the side beam assembly, and the side of the electrical box connected to the side beam assembly can serve as one of the "side beams" of the battery box, saving materials, reducing the volume of the battery box, thereby reducing the overall volume of the battery box and improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a structural diagram of an embodiment of a battery box provided by the utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of the structure of the electrical box;

[0027] Figure 3 yes Figure 1 Schematic diagram of the structure of the battery box;

[0028] Figure 4 yes Figure 3 Side view of the middle battery box;

[0029] Figure 5 yes Figure 4 A is an enlarged schematic diagram;

[0030] Figure 6 yes Figure 3 A structural diagram of the battery box from another perspective;

[0031] Figure 7 yes Figure 1 Schematic diagram of the structure of the first side beam.

[0032] Explanation of Figure Numbers

[0033]

[0034] DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", 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.

[0036] The battery pack consists of a battery case and an electrical enclosure. A pressure relief channel is required within the battery case to provide pressure relief, and this channel must be airtight. In related art, the battery case and electrical enclosure are integrally formed and then separated by a partition, leaving the battery case and electrical enclosure connected. This allows gas from the battery case to easily penetrate into the electrical enclosure, leading to uncontrolled pressure inside the battery pack and a potential explosion.

[0037] In view of this, the utility model proposes a battery box. Figures 1 to 7 This is a structural schematic diagram of an embodiment of the battery box provided by the utility model. The battery box provided by the utility model has a simple structure and can solve the technical problems in the related art that the battery box has poor air tightness and gas easily leaks into the electrical box. The battery box will be described in detail below in conjunction with the main drawings.

[0038] See also Figure 1 、 Figure 2 and Figure 3 The battery box 100 includes a battery box body 103 and an electrical box body 101; the electrical box body 101 is provided with an electrical compartment 102; the battery box body 103 is provided with a battery compartment 104 and a battery pressure relief chamber 105, the battery box body 103 includes a side beam assembly 106 and an explosion-proof valve 107, the side beam assembly 106 is provided with a side beam pressure relief chamber 108, the battery pressure relief chamber 105 is connected to the explosion-proof valve 107 through the side beam pressure relief chamber 108, the electrical box body 101 is connected to the side beam assembly 106, and the electrical box body 101 seals the side beam pressure relief chamber 108.

[0039] In the technical solution of the present invention, the electrical box 101 is provided with an electrical compartment 102, and a plurality of electrical modules are provided in the electrical compartment 102. The battery box 103 is provided with a battery compartment 104, and a plurality of battery cells are provided in the battery compartment 104. The electrical compartment 102 and the battery compartment 104 are two independent areas. The battery compartment 104 and the electrical compartment 102 are not connected to each other. The gas in the battery pressure relief chamber 105 will not penetrate into the electrical compartment 102, thereby ensuring the stability of the air pressure of the entire battery box 100 and improving the safety of the battery box 100. At the same time, the electrical box 101 is connected to the side beam assembly 106, and the electrical box 101 can seal the side beam pressure relief cavity 108 in the side beam assembly 106, thereby preventing the gas in the side beam pressure relief cavity 108 from penetrating into the electrical compartment 102. At the same time, the electrical box 101 is connected to the side beam assembly 106, and the side where the electrical box 101 is connected to the side beam assembly 106 can serve as one of the "side beams" of the battery box 101, saving materials and reducing the volume of the battery box 101, thereby reducing the overall volume of the battery box 100 and improving space utilization.

[0040] In some embodiments, the battery compartment 104 is configured to install multiple electrical modules, and the battery compartment 104 is configured to install multiple battery cells, and the multiple battery cells are electrically connected to the multiple electrical modules.

[0041] It should be noted that the specific shapes of the battery box 103 and the electrical box 101 are not limited and can be rectangular, square, trapezoidal, polygonal or irregular shapes, and can be selected according to actual needs. In this embodiment, the battery box 103 and the electrical box 101 are rectangular in shape.

[0042] In some embodiments, see Figure 3The battery compartment 104 includes a bottom plate 119, which has a first side, a second side, a third side, and a fourth side. The first side and the second side are arranged opposite to each other, the third side and the fourth side are arranged opposite to each other, and the third side and the fourth side are located between the first side and the second side. The fourth side is connected to the electrical box 101. The side beam assembly 106 includes two first side beams 109 and a second side beam 110 arranged opposite to each other. The two second side beams 110 are located on the first side and the second side, respectively, and the second side beam 110 is located on the third side. A first pressure relief channel is formed in the two first side beams 109, and a second pressure relief channel is formed in the second side beam 110. The two first pressure relief channels have a first end a away from the electrical box 101 and a second end b close to the electrical box 101. The first ends a of the two first pressure relief channels are respectively connected to the two ends of the second pressure relief channel to form a side beam pressure relief channel. The second ends b of the two first pressure relief channels are connected to the electrical box 101 and are blocked by the electrical box 101. In this way, the gas in the first pressure relief channel and the second pressure relief channel will not penetrate into the electrical box 101 , so that the battery box 100 is in a normal air pressure state, thereby improving the safety of the battery box 100 .

[0043] Further, see Figure 2 The electrical box 101 has a first side wall, a second side wall, a third side wall, and a fourth side wall. The first side wall and the second side wall are arranged opposite each other, and the third side wall and the fourth side wall are arranged opposite each other, and the third side wall and the fourth side wall are located between the first side wall and the second side wall. The third side wall is located near the battery box 103. In some embodiments, two first side beams 109 are simultaneously connected to the third side wall, that is, the third side wall simultaneously blocks both first pressure relief channels. This arrangement makes the third side wall serve as a common "side wall" for the battery box 103 and the electrical box 101, improving space utilization, saving materials, and reducing costs. In another embodiment, the two first side beams 109 are respectively connected to the first side wall and the second side wall, that is, the first side wall blocks one of the first pressure relief channels, and the second side wall blocks the other first pressure relief channel. This arrangement increases the volume of the battery compartment 104, allowing the battery compartment 104 to accommodate more battery cells, increasing the capacity of the battery box 100, and making the battery box 100 applicable in more applications. It should be noted that the above two embodiments can be selected according to actual circumstances.

[0044] See also Figure 7Each of the first side beams 109 includes a first beam body 111 and a second beam body 112. The first beam body 111 is connected to the side of the second beam body 112 close to the battery compartment 104. The second beam body 112 serves as the main bearing beam, and the first beam body 111 serves as an auxiliary beam. The height of the first beam body 111 is less than that of the second beam body 112, which does not affect the overall size and capacity of the battery box 100, and can also save materials and reduce costs. In addition, the first beam body 111 is also used to support the mounting bracket, so that the mounting bracket can be easily fixed in the battery box. Furthermore, a first pressure relief channel is formed in the first beam body 111.

[0045] Further, see Figure 7 The second side beam 110 also includes a first beam body 111 and a second beam body 112. The setting method of the first beam body 111 and the second beam body 112 of the second side beam 110 is the same as the setting method of the first beam body 111 and the second beam body 112 of the first side beam 109. The setting method of the first side beam 109 can be referred to and will not be repeated here.

[0046] Refer to Figure 7. The two first side beams 109 include two first beam bodies 111, and the second side beam 110 includes a second beam body 112. That is, the side beam assembly 106 includes a total of three first beam bodies 111. Each first beam body 111 is provided with a plurality of cavities 113. Specifically, in this embodiment, a total cavity is formed in the first beam body 111. The side beam assembly 106 also includes a plurality of first partitions 120. The plurality of first partitions 120 are spaced apart in the total cavity, thereby dividing the total cavity into a plurality of cavities 113. Each first partition 120 is provided with a through hole to connect the plurality of cavities 113. This arrangement can improve the strength of the first beam body 111. At the same time, the plurality of cavities 113 can absorb impact force. When the side beam assembly 106 is hit or impacted, the plurality of cavities 113 can disperse the impact force on the side beam assembly 106, preventing the side beam assembly 106 from bending and deforming, which could cause compression damage to the battery cells, thereby improving the safety performance of the battery box 100.

[0047] It should be noted that the structure of the second beam 112 is not limited. In one embodiment, the second beam 112 is a solid beam, which can increase the strength of the battery case 103 and prevent the battery case 103 from deforming and squeezing the multiple battery cells within the battery compartment 104. In another embodiment, the second beam 112 also has multiple cavities 113 formed therein. The specific structure of the second beam 112 is similar to that of the first beam 111. The structure of the second beam 112 can be configured with reference to the first beam 111 and will not be further described here.

[0048] See also Figure 4 and Figure 5The battery box 103 also includes a battery mounting bracket 117. The battery mounting bracket 117 is arranged in the battery compartment 104, and the battery mounting bracket 117 is spaced apart from the bottom plate 119 to form a battery pressure relief chamber 105. A plurality of mounting positions are formed on the battery mounting bracket 117, and a plurality of battery cells are respectively mounted on the plurality of mounting positions. The battery pressure relief chamber 105 is connected to the side beam pressure relief chamber 108. During the actual pressure relief process, the gas generated by the plurality of battery cells is transferred to the battery pressure relief chamber 105, and then transferred from the battery pressure relief chamber 105 to the side beam pressure relief chamber 108. An explosion-proof valve 107 is provided on the side beam assembly 106. When the gas in the side beam pressure relief chamber 108 reaches a critical value, the explosion-proof valve 107 opens to discharge the gas, thereby avoiding explosions of the battery box 100.

[0049] In some embodiments, see Figure 4 and Figure 5 The battery case 103 also includes fireproof paper 118, which is placed on the upper surface of the battery mounting bracket 117. Generally, to prevent short circuits within the battery case 103, the battery mounting bracket 117 is often made of plastic. Since the battery cells generate a large amount of heat during operation, placing fireproof paper 118 on the battery mounting bracket 117 can isolate the heat generated by the multiple cells and prevent the battery mounting bracket 117 from deforming due to heat. Furthermore, if thermal runaway occurs in multiple cells, the fireproof paper 118 can prevent the spread of thermal runaway, thereby reducing the risk.

[0050] It should be noted that, referring to Figure 7 , at least one first side beam 109 is provided with a side beam pressure relief port 114, which connects the battery pressure relief chamber 105 and the side beam pressure relief chamber 108. It should be noted that the specific location of the side beam pressure relief port 114 is not limited. In order to facilitate the connection between the battery pressure relief chamber 105 and the side beam pressure relief chamber 108, the side beam pressure relief port 114 is arranged at the bottom of the first side beam 109, and the side beam assembly 106 is fixedly connected to the bottom plate. In order to avoid interference of the bottom plate with the side beam pressure relief port 114, the bottom of the first beam body 109 is higher than the bottom of the second beam body 110. In this way, there is a certain gap between the bottom of the first side beam 119 and the bottom plate, thereby avoiding the bottom plate blocking the side beam pressure relief port 114. Specifically, in order to avoid excessive air pressure in the battery compartment 104, each first side beam 109 is provided with two side beam pressure relief ports 114, one of which is close to the electrical box body 101, and the other side beam pressure relief port 114 is close to the second side beam 110. Pressure is relieved through multiple side beam pressure relief ports 114 to ensure that the air pressure in the battery compartment 104 is in a balanced state, so that multiple battery cells are in normal working condition, and the safety performance of the battery box 100 is improved.

[0051] In some other embodiments, the bottom of the first beam body 111 is higher than the bottom of the second beam body 112, and the side beam pressure relief port 114 is provided on the side of the second beam body 112 close to the first beam body 111, and is located below the first beam body 111. This arrangement will not affect the installation of the mounting bracket 117, and can also achieve the connection between the battery pressure relief chamber 105 and the side beam pressure relief chamber 108, thereby achieving pressure relief and improving the safety of the battery box 100.

[0052] In some other embodiments, a side beam pressure relief port 114 is provided on the first beam body 111, and the side beam pressure relief port 114 is located on the side of the first beam body 111 away from the second beam body 112. Such a setting can increase the space of the battery pressure relief chamber 105, so that the battery box can withstand greater air pressure.

[0053] In this example, see Figure 6 The second side beam 110 includes a first beam body 111 and a second beam body 112. The first beam body 111 is connected to the side of the second beam body 112 near the battery compartment 104. The cavity 113 of the first beam body 111 of the second side beam 110 communicates with the cavities 113 of the first beam bodies 111 of the two first side beams 109. The explosion-proof valve 107 is installed on the second beam body 112 of the second side beam 110. The cavity 113 of the first beam body 111 of the second side beam 110 communicates with the cavity 113 of the second beam body 112 of the second side beam 110. In this way, pressure relief can be achieved.

[0054] It should be noted that the cavity 113 of the first beam 111 of the first side beam 109 and the cavity 113 of the second beam 112 of the first side beam 109 can be interconnected or independent of each other, and can be designed according to actual conditions. In some embodiments, when the number of battery cells in the battery compartment 104 is large, the battery cells generate a large amount of gas. The cavity 113 of the first beam 111 of the first side beam 109 and the cavity 112 of the second beam 112 of the first side beam 109 are connected, and the gas in the battery pressure relief chamber 105 is transferred through the cavity 113 of the first beam 111 and the cavity 113 of the second beam 112 at the same time, thereby avoiding excessive gas pressure in the battery compartment 104. In another embodiment, the number of battery cells in the battery compartment 104 is small, and the gas generated by the battery cells is small. Therefore, the gas can be transferred through the cavity 113 of the first beam 111, and the cavity 113 of the first beam 111 of the first side beam 109 and the cavity 113 of the second beam 112 of the first side beam 109 are not connected.

[0055] Specifically, in this embodiment, the electrical box 101 includes a side panel 115 (i.e., the aforementioned third side wall). The side panel 115 (i.e., the aforementioned third side wall) is located between the electrical compartment 102 and the battery compartment 104. The side panel 115 (i.e., the aforementioned third side wall) is connected to the ends of the two first side beams 109 of the battery box 103 away from the second side beam 110 and seals the side beam pressure relief cavity 108. The provision of the side panel 115 not only blocks the first side beam 109 and the second side beam 110, but also serves as a common "side wall" for the battery box 103 and the electrical box 101, thereby improving space utilization, saving materials, and reducing costs.

[0056] In some embodiments, the electrical box 101 is a cast box, and the electrical box 101 is formed by integral die-casting, so that there is no gap between the first side wall, the second side wall, the third side wall and the fourth side wall of the electrical box 101. The electrical box 101 is a sealed box, thereby preventing the gas in the battery box 103 from entering the electrical box 101, thereby providing safety performance for the battery box 100.

[0057] In some embodiments, the battery box 103 is a profiled box, and the two first side beams 109 and the second side beam 110 are formed from a profile plate. The two first side beams 109 and the second side beam 110 are first welded together, and then the two first side beams 109 and the second side beam 110 are welded to the bottom plate 119. Subsequently, the ends of the two first side beams 109 away from the second side beam 110 are welded to the side plate 115, thereby completing the assembly of the battery box 100. The use of welding can improve the stability of the battery box 103. At the same time, the welding connection method makes the connection between the first side beam 109 and the second side beam 110 more tight and stable, preventing gas leakage from the connection between the first side beam 109 and the second side beam 110.

[0058] In some embodiments, the two first side beams 109 are simultaneously connected to the third side wall, which serves as a common "side wall" for the battery case 103 and the electrical case 101. The third side wall is provided with a plurality of openings 116, which are configured to allow cooling pipes or wiring harnesses connecting the electrical module and the plurality of battery cells to pass through. To prevent the battery case 103 and the electrical case 101 from being connected, after the plurality of battery cells in the battery case are installed and the cooling pipes and wiring harnesses are connected, foam glue is injected into the battery case 103. After the foam glue solidifies, the plurality of openings 116 are sealed.

[0059] In addition, the present invention also provides a battery pack, which includes a battery box 100. The specific structure of the battery box 100 is referred to the above embodiments. Since the present battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be detailed here.

[0060] Furthermore, the battery pack also includes multiple battery cells, and the multiple battery cells are correspondingly installed on the battery mounting bracket 117. After the multiple battery cells are installed, foam glue is injected into the battery compartment 104, and the foam glue is wrapped around the multiple battery cells, thereby fixing the multiple battery cells. At the same time, after the foam glue solidifies, it will also seal the multiple openings 116 on the side panel 115, further ensuring the sealing of the electrical compartment 102.

[0061] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, based on the idea of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery box, characterized in that: include: An electrical box body, provided with an electrical compartment; and A battery box is provided with a battery compartment and a battery pressure relief cavity. The battery box includes a side beam assembly and an explosion-proof valve. The side beam assembly is provided with a side beam pressure relief cavity. The battery pressure relief cavity is connected to the explosion-proof valve through the side beam pressure relief cavity. The electrical box is connected to the side beam assembly and is used to seal the side beam pressure relief cavity. Wherein, the side beam assembly includes two first side beams and a second side beam arranged opposite to each other, and the second side beam is connected between the two first side beams; The electrical box is integrally formed and includes side panels, which are arranged between the electrical compartment and the battery compartment. The side panels are connected to the ends of the two first side beams of the battery box away from the second side beam and seal the side beam pressure relief cavity.

2. The battery box according to claim 1, characterized in that: The two first side beams and the second side beams are commonly provided with the side beam pressure relief cavity, and the electrical box is connected to the ends of the two first side beams away from the second side beam and seals the side beam pressure relief cavity.

3. The battery box according to claim 2, characterized in that: Both the first side beams and the second side beams include a first beam body and a second beam body, the first beam body is connected to the side of the second beam body close to the battery compartment, the top of the second beam body is higher than the top of the first beam body, wherein the first beam body is provided with the side beam pressure relief cavity.

4. The battery box according to claim 3, characterized in that: The second beam bodies of the two first side beams and the second beam bodies of the second side beams are both provided with a total cavity.

5. The battery box according to claim 4, characterized in that: The side beam assembly further includes a plurality of first partitions, which are spaced apart in the total cavity to divide the total cavity into a plurality of cavities.

6. The battery box according to any one of claims 3 to 5, characterized in that: At least one of the first side beams is provided with a side beam pressure relief port, and the side beam pressure relief port is connected to the battery pressure relief cavity and the side beam pressure relief cavity.

7. The battery box according to claim 6, characterized in that: The bottom of the first beam body is higher than the bottom of the second beam body, and the side beam pressure relief port is provided at the bottom of the first beam body; or The bottom of the first beam is higher than the bottom of the second beam, and the side beam pressure relief port is provided on a side of the second beam close to the first beam and below the first beam; or The side beam pressure relief port is provided on the first beam body and is located on a side of the first beam body facing away from the second beam body.

8. The battery box according to any one of claims 3 to 5, characterized in that: The explosion-proof valve is installed on the second beam body of the second side beam, and the first beam body of the second side beam is communicated with the second beam body of the second side beam.

9. The battery box according to any one of claims 1 to 5, characterized in that: The electrical box is a cast box, the battery box is a profile box, and the side panels are welded to the ends of the two first side beams of the battery box that are away from the second side beam.

10. The battery box according to any one of claims 1 to 5, characterized in that: The side plate is formed with a plurality of openings, and the plurality of openings are configured to allow cooling pipes or connecting wire harnesses to pass through.

11. A battery pack, characterized in that: Comprising a battery box as described in any one of claims 1-10.

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