Battery box and battery pack

Abstract

The invention provides a battery box and a battery pack, the battery box comprises a frame, the frame comprises a support beam extending along a first direction and an accommodating cavity located on at least one side of the support beam along a second direction, the accommodating cavity is used for accommodating a battery, and an included angle is formed between the second direction and the first direction; wherein a pressure relief channel extending in the length direction of the supporting beam is formed in the supporting beam, a pressure relief hole communicated with the pressure relief channel is formed in the side, facing the containing cavity, of the supporting beam, and the pressure relief hole is used for being arranged corresponding to an anti-explosion valve, close to one end of the supporting beam, of the battery in the second direction. According to the battery box provided by the embodiment of the invention, liquid and high-temperature gas discharged by the explosion-proof valve of the battery can be directly discharged into the pressure relief channel of the supporting beam, a pressure relief path is shorter, and the condition of blockage is not easy to occur.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery box and a battery pack. BACKGROUND

[0002] A relief cavity is usually arranged in the battery box of the battery pack, so that when the explosion-proof valve of the battery is opened, the high-pressure gas in the battery can be discharged to the relief cavity through the explosion-proof valve, and then discharged through the relief valve in communication with the relief cavity, thereby improving the safety performance of the battery pack.

[0003] However, in the related art, the relief cavity of the battery box is prone to blockage, affecting the relief effect of the battery pack. SUMMARY

[0004] Embodiments of the present application provide a battery box and a battery pack, which can improve the technical problem that the relief cavity of the battery box is prone to blockage.

[0005] In a first aspect, embodiments of the present application provide a battery box, comprising a frame, the frame comprising a support beam extending along a first direction, and a containing cavity located on at least one side of the support beam along a second direction, the containing cavity being used to contain a battery, and the second direction being arranged at an angle to the first direction.

[0006] In some embodiments, a projection of the relief hole and a projection of the explosion-proof valve of the battery corresponding to the relief hole overlap on a projection plane perpendicular to the second direction, so that the relief hole and the explosion-proof valve of the battery corresponding to the relief hole are arranged along the second direction close to one end of the support beam, facilitating the battery to discharge liquid and high-temperature gas through the explosion-proof valve and the relief hole into the relief channel of the support beam.

[0007] In some embodiments, the frame comprises a plurality of support beams and a plurality of containing cavities, and the plurality of support beams and the plurality of containing cavities are arranged alternately along the second direction. In this way, the battery box can contain more batteries, and at least a part of the explosion-proof valves of the batteries in the containing cavities can be arranged corresponding to the relief holes of the support beams on one side of the containing cavities along the second direction, and at least another part of the explosion-proof valves of the batteries in the containing cavities can be arranged corresponding to the relief holes of the support beams on the other side of the containing cavities along the second direction.

[0008] In some embodiments, the frame comprises a plurality of support beams and a plurality of containing cavities, and the plurality of support beams and the plurality of containing cavities are arranged alternately along the second direction. In this way, the battery box can contain more batteries, and at least a part of the explosion-proof valves of the batteries in the containing cavities can be arranged corresponding to the relief holes of the support beams on one side of the containing cavities along the second direction, and at least another part of the explosion-proof valves of the batteries in the containing cavities can be arranged corresponding to the relief holes of the support beams on the other side of the containing cavities along the second direction.

[0009] In some embodiments, the support beam includes a first support beam located between the two receiving cavities, and the first support beam has pressure relief holes on both sides along the second direction. This allows the batteries within the receiving cavities on both sides of the first support beam along the second direction to discharge liquid and high-temperature gas into the pressure relief channel of the first support beam via explosion-proof valves.

[0010] In some embodiments, the pressure relief channel is provided with a partition extending along the length of the first support beam. The partition divides the pressure relief channel into two sub-channels distributed along the second direction. The two sub-channels are connected to the pressure relief holes on both sides of the first support beam. Thus, the partition can effectively block liquids and high-temperature gases entering from the pressure relief holes, reducing the impact of liquids and high-temperature gases from the battery on one side of the first support beam along the second direction on the battery on the other side of the first support beam along the second direction after entering the pressure relief channel.

[0011] In some embodiments, the partition has a through hole connecting the two sub-channels. This allows the batteries on both sides of the first support beam to share the pressure relief channel of the first support beam by correspondingly connecting the two sub-channels to the pressure relief holes on both sides of the first support beam in the second direction, which is beneficial for improving the pressure relief efficiency and stability of the battery.

[0012] In some embodiments, one edge of the partition is connected to the inner wall of the pressure relief channel, and the other edge of the partition is spaced apart from the inner wall of the pressure relief channel to divide the pressure relief channel into two sub-channels distributed along the second direction, and a through hole is formed between the other edge of the partition and the inner wall of the pressure relief channel. This facilitates communication between the two sub-channels, and simplifies the fabrication of the first support beam due to the simplified partition structure.

[0013] In some embodiments, a baffle is provided within the pressure relief channel. In the second direction, the baffle and the partition are spaced apart, and the orthographic projection of the baffle at least partially overlaps with the orthographic projection of the through hole. Thus, while the batteries on both sides of the first support beam along the second direction share the pressure relief channel of the first support beam, when liquid and high-temperature gas from the battery on one side of the first support beam along the second direction enter the pressure relief channel, the baffle can shield the liquid and high-temperature gas, preventing them from impacting the battery on the other side of the first support beam along the second direction and thus affecting the battery on the other side of the first support beam along the second direction.

[0014] In some embodiments, on a projection plane perpendicular to the second direction, the orthographic projection of the baffle covers the orthographic projection of the through hole. This further enhances the baffle's shielding effect against liquids and high-temperature gases, thereby further reducing the risk of liquids and high-temperature gases impacting the battery on the other side of the first support beam along the second direction.

[0015] In some embodiments, one edge of the partition is connected to the inner wall of the pressure relief channel along the third direction, and the other edge of the partition is spaced apart from the inner wall of the pressure relief channel along the third direction. The first direction, the second direction, and the third direction form an angle with each other, thereby dividing the pressure relief channel into two sub-channels distributed along the second direction, and forming a through hole connecting the two sub-channels between the other edge of the partition and the inner wall of the pressure relief channel along the third direction.

[0016] The baffle is located on one side of the partition along the second direction. One edge of the baffle is connected to the inner wall of the pressure relief channel along the third direction on the other side. The other edge of the partition is spaced apart from the inner wall of the pressure relief channel along the third direction on one side. This allows the partition to effectively block the through hole and makes the processing of the baffle and partition more convenient, which helps to reduce the processing cost of the first support beam.

[0017] In some embodiments, the battery box further includes a bracket disposed on the side of the support beam facing the receiving cavity. The bracket has a positioning groove on the side opposite to the corresponding support beam that communicates with the pressure relief hole. The positioning groove is used for inserting the end of the battery equipped with the explosion-proof valve to position the battery and the bracket. By inserting the end of the battery equipped with the explosion-proof valve into the positioning groove of the bracket and connecting the bracket to the support beam, the explosion-proof valve of the battery can be accurately aligned with the pressure relief hole of the support beam, thus improving battery installation efficiency.

[0018] In some embodiments, the bracket has a positioning protrusion on one side facing the corresponding support beam. The positioning protrusion is inserted into the pressure relief hole to position the bracket and the support beam. By inserting the positioning protrusion of the bracket into the pressure relief hole, the relative positions of the bracket and the support beam can be positioned, thereby positioning the relative positions of the battery and the support beam, which helps to further improve the battery installation efficiency.

[0019] In some embodiments, the support beam includes second support beams located on both sides of the frame along the second direction, and at least one of the second support beams is provided with a collapsible energy-absorbing element on the side facing the receiving cavity. The structural strength of the collapsible energy-absorbing element is less than the structural strength of the second support beam and the structural strength of the battery. When the side of the second support beam away from the receiving cavity is impacted or compressed, the collapsible energy-absorbing element can absorb the impact or compression force, preventing the impact or compression force from being transmitted to the battery, which could cause the battery to deform or even be damaged.

[0020] In some embodiments, the collapsible energy-absorbing component has a clearance hole at the position corresponding to the pressure relief hole, so that after the battery's explosion-proof valve is opened, the liquid and high-temperature gas in the battery can be discharged through the clearance hole to the pressure relief hole and enter the pressure relief channel of the second support beam.

[0021] In some embodiments, on a projection plane perpendicular to the second direction, the orthographic projection of the clearance hole covers the orthographic projection of the pressure relief hole, so that liquid and high-temperature gas in the battery can be discharged more smoothly through the clearance hole to the pressure relief hole.

[0022] In some embodiments, the bracket is disposed on the side of the collapsible energy-absorbing member opposite to the second support beam, thereby enabling the battery to be quickly positioned by the bracket.

[0023] In some embodiments, the bracket has a positioning protrusion on one side facing the corresponding support beam. The positioning protrusion is inserted into the clearance hole to position the bracket and the collapsible energy-absorbing component, so that the battery's explosion-proof valve quickly aligns with the clearance hole position of the collapsible energy-absorbing component, thereby improving the battery's installation efficiency.

[0024] In some embodiments, the collapsible energy absorber extends along the length direction of the second support beam to increase the length of the collapsible energy absorber, so that the collapsible energy absorber can have a good collapsible energy absorption effect at different parts along the length direction of the second support beam; in the cross section perpendicular to the first direction, the cross section shape of the collapsible energy absorber is a rectangular ring, so that the structure of the collapsible energy absorber is relatively simple, the processing is very convenient, and the collapsible energy absorber has a good collapsible energy absorption effect.

[0025] In some embodiments, the frame further includes a rear beam extending along the second direction, the rear beam being connected to one end of the support beam along the first direction, the rear beam having a pressure relief chamber communicating with the pressure relief channel, and at least one pressure relief valve communicating with the pressure relief chamber being provided on the side of the rear beam opposite to the support beam. Thus, liquid and high-temperature gas discharged into the pressure relief channel of the support beam can be transferred to the pressure relief chamber of the rear beam and discharged through the pressure relief valve.

[0026] In some embodiments, the battery box further includes a bottom protective plate connected to the frame, with one side of the bottom protective plate facing the receiving cavity; the thickness of the bottom protective plate is greater than or equal to 3 mm to improve the structural strength of the bottom protective plate, thereby further improving the protection effect on the battery.

[0027] In some embodiments, the battery box further includes a bottom protective plate connected to the frame, with one side of the bottom protective plate facing the receiving cavity; a buffer plate is provided on the side of the bottom protective plate facing the receiving cavity. The buffer plate can form a buffer between the bottom protective plate and the battery to further improve the protection of the battery.

[0028] In some embodiments, a support plate is provided on the side of the buffer plate opposite to the bottom protective plate. The side of the support plate opposite to the buffer plate is used to abut against the outer peripheral surface of the battery, thereby providing a certain support and positioning function for the battery and making the battery position more stable.

[0029] Secondly, embodiments of this application provide a battery pack, comprising:

[0030] A battery box, as described above, includes a frame, a support beam extending along a first direction, and a receiving cavity located on at least one side of the support beam along a second direction for accommodating a battery. The second direction is angled to the first direction. A pressure relief channel extending along the length of the support beam is formed within the support beam, and a pressure relief hole communicating with the pressure relief channel is formed on the side of the support beam facing the receiving cavity. The pressure relief hole is configured to correspond to an explosion-proof valve of the battery located near one end of the support beam along the second direction.

[0031] The battery module includes a battery installed in the receiving cavity of the battery box, and an explosion-proof valve is provided at one end of the battery along a second direction.

[0032] In some embodiments, the length of the battery in the second direction is greater than or equal to 140 mm.

[0033] The beneficial effects of the embodiments of this application are as follows:

[0034] The battery box provided in this application embodiment forms a pressure relief channel extending along the length of the support beam within a support beam extending in a first direction of the frame, and a pressure relief hole communicating with the pressure relief cavity is formed on the side of the support beam facing the receiving cavity. When a battery is placed in the receiving cavity on at least one side of the support beam along a second direction, the pressure relief hole is configured to correspond to the explosion-proof valve of the battery near the end of the support beam along the second direction. When the explosion-proof valve of the battery is opened, the liquid and high-temperature gas inside the battery can be directly discharged into the pressure relief channel of the support beam through the pressure relief hole of the support beam, and then discharged out through the pressure relief channel.

[0035] Compared to related technologies where the explosion-proof valve of a battery is located at the bottom of the battery, and the liquid and high-temperature gas inside the battery are discharged through the explosion-proof valve to the pressure relief chamber at the bottom of the battery box, and then transmitted through the pressure relief chamber to the pressure relief channel of the support beam, the battery box provided in this application embodiment allows the liquid and high-temperature gas discharged from the battery's explosion-proof valve to be directly discharged into the pressure relief channel of the support beam, resulting in a shorter pressure relief path and reducing the likelihood of blockage. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is an exploded structural diagram of one embodiment of the battery pack provided in this application.

[0038] Figure 2 A schematic diagram of the structure of an embodiment of the frame and battery module provided in this application;

[0039] Figure 3 A schematic diagram of the structure of one embodiment of the framework provided in this application;

[0040] Figure 4 An exploded structural diagram of one embodiment of the first support beam, battery, and bracket provided in this application;

[0041] Figure 5 A partial enlarged view of the bracket provided in the embodiments of this application;

[0042] Figure 6 A schematic diagram of the structure of one embodiment of the first support beam, battery and bracket provided in this application;

[0043] Figure 7 An exploded structural diagram of one embodiment of the second support beam, battery, bracket, and collapsible energy absorber provided in this application;

[0044] Figure 8 This is a schematic diagram of the structure of one embodiment of the second support beam, battery, bracket and collapsible energy-absorbing component provided in this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1-Battery pack; 10-Battery box; 11-Frame; 110-Support beam; 1100-Pressure relief channel; 1101-Sub-channel; 1102-Pressure relief hole; 111-First support beam; 1111-Separator; 1112-Through hole; 1113-Baffle; 112-Second support beam; 113-Receiving cavity; 114-Rear beam; 115-Bracket; 1151-Positioning groove; 1152-Positioning protrusion; 116-Collapse energy absorption component; 1161-Avoidance hole; 117-Bottom guard plate; 118-Buffer plate; 119-Support plate; 20-Battery module; 21-Battery; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0048] This application provides a battery box and a battery pack.

[0049] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery pack provided in this application. Figure 1 As shown, the battery pack 1 includes a battery box 10 and a battery module 20. The battery box 10 includes a receiving cavity 113, and the battery module 20 includes a battery 21 installed in the receiving cavity 113 of the battery box 10.

[0050] like Figures 1 to 3 As shown, the battery box 10 of the battery pack 1 includes a frame 11, which includes a support beam 110 extending along a first direction X, and a receiving cavity 113 located on at least one side of the support beam 110 along a second direction Y, the receiving cavity 113 being used to receive the battery 21, wherein the second direction Y is arranged at an angle to the first direction X.

[0051] It should be noted that the angle formed by the second direction Y and the first direction X can be a right angle or an acute angle, depending on the structure of frame 11, and is not limited here.

[0052] In some embodiments, a pressure relief channel 1100 extending along its length can be formed in the support beam 110, and a pressure relief hole 1102 communicating with the pressure relief channel 1100 can be formed on the side of the support beam 110 facing the receiving cavity 113. The pressure relief hole 1102 is configured to correspond to the explosion-proof valve of the battery 21 near the end of the support beam 110 along the second direction Y.

[0053] The battery box 10 provided in this application embodiment forms a pressure relief channel 1100 extending along the length direction of the support beam 110 within the support beam 110 extending along the first direction X of the frame 11. A pressure relief hole 1102 communicating with the pressure relief cavity is formed on the side of the support beam 110 facing the receiving cavity 113. When a battery 21 is placed in the receiving cavity 113 on at least one side of the support beam 110 along the second direction Y, the pressure relief hole 1102 is configured to correspond to the explosion-proof valve of the battery 21 at the end near the support beam 110 along the second direction Y. When the explosion-proof valve of the battery 21 is opened, the liquid and high-temperature gas inside the battery 21 can be directly discharged into the pressure relief channel 1100 of the support beam 110 through the pressure relief hole 1102, and then discharged through the pressure relief channel 1100.

[0054] Compared with the related technology in which the explosion-proof valve of battery 21 is located at the bottom of battery 21, and the liquid and high-temperature gas inside battery 21 are discharged through the explosion-proof valve to the pressure relief chamber at the bottom of battery box 10, and then transmitted through the pressure relief chamber to the pressure relief channel 1100 of support beam 110, the battery box 10 provided in this application embodiment can directly discharge the liquid and high-temperature gas discharged by the explosion-proof valve of battery 21 into the pressure relief channel 1100 of support beam 110. The pressure relief path is shorter and less prone to blockage.

[0055] In some embodiments, on a projection plane perpendicular to the second direction Y, the orthographic projection of the pressure relief hole 1102 may overlap with the orthographic projection of the corresponding explosion-proof valve of the battery 21, so that the pressure relief hole 1102 and the explosion-proof valve of the battery 21 along the second direction Y near the end of the support beam 110 are correspondingly arranged, so that the battery 21 can discharge liquid and high-temperature gas into the pressure relief channel 1100 of the support beam 110 through the explosion-proof valve and the pressure relief hole 1102.

[0056] It should be noted that the orthographic projection of the pressure relief hole 1102 on the projection plane perpendicular to the second direction Y can cover the orthographic projection of the explosion-proof valve of the battery 21 on the same plane. Alternatively, the orthographic projection of the explosion-proof valve of the battery 21 on the same plane can cover the orthographic projection of the pressure relief hole 1102 on the same plane. Or, the orthographic projection of the pressure relief hole 1102 on the same plane can only partially overlap with the orthographic projection of the explosion-proof valve on the same plane. Of course, the former allows the battery 21 to more smoothly discharge liquid and high-temperature gas into the pressure relief channel 1100 of the support beam 110 through the explosion-proof valve and the pressure relief hole 1102.

[0057] In some embodiments, the frame 11 may include a plurality of support beams 110 and a plurality of receiving cavities 113, which are alternately arranged in the second direction Y. This allows the battery box 10 to accommodate more batteries 21. Furthermore, the explosion-proof valves of at least a portion of the batteries 21 within the receiving cavities 113 can be correspondingly arranged with the pressure relief holes 1102 of the support beams 110 on one side of the receiving cavity 113 along the second direction Y, and the explosion-proof valves of at least another portion of the batteries 21 within the receiving cavities 113 can be correspondingly arranged with the pressure relief holes 1102 of the support beams 110 on the other side of the receiving cavity 113 along the second direction Y.

[0058] Specifically, the support beam 110 may have multiple pressure relief holes 1102 on the side facing the receiving cavity 113. The multiple pressure relief holes 1102 of the support beam 110 are spaced apart along the length of the support beam 110 and are respectively connected to the pressure relief channels 1100 within the support beam 110. The receiving cavity 113 contains at least one layer of batteries 21, and each battery pack 1 includes two rows of batteries 21 distributed along the second direction Y, with each row of batteries 21 arranged sequentially along the first direction X. The explosion-proof valves of the two rows of batteries 21 are correspondingly provided with the multiple pressure relief holes 1102 on both sides of the support beam 110 along the second direction Y of the receiving cavity 113.

[0059] like Figure 1 As shown, a busbar is also provided on the side of the battery 21 away from the corresponding support beam 110. This busbar is connected to multiple batteries 21 to connect them in series or in parallel. A temperature regulating plate is also provided between two adjacent layers of batteries 21 to regulate the temperature of the battery 21.

[0060] In some embodiments, such as Figure 3 and Figure 4As shown, the support beam 110 includes a first support beam 111 located between two receiving cavities 113. The first support beam 111 has pressure relief holes 1102 on both sides along the second direction Y. This allows the batteries 21 within the receiving cavities 113 on both sides of the first support beam 111 along the second direction Y to discharge liquid and high-temperature gas into the pressure relief channel 1100 of the first support beam 111 via explosion-proof valves.

[0061] Among them, such as Figure 6 As shown, a partition 1111 extending along the length of the first support beam 111 can be provided within the pressure relief channel 1100. The partition 1111 divides the pressure relief channel 1100 into two sub-channels 1101 distributed along the second direction Y. The two sub-channels 1101 are connected to the pressure relief holes 1102 on both sides of the first support beam 111. Thus, the partition 1111 can block liquids and high-temperature gases entering from the pressure relief holes 1102, reducing the impact of liquids and high-temperature gases from the battery 21 on the other side of the first support beam 111 along the second direction Y after entering the pressure relief channel 1100.

[0062] Specifically, the partition 1111 can be formed with a through hole 1112 that connects two sub-channels 1101. Thus, by connecting the two sub-channels 1101 with the pressure relief holes 1102 on both sides of the first support beam 111, the batteries 21 on both sides of the first support beam 111 along the second direction Y can share the pressure relief channel 1100 of the first support beam 111, which is beneficial to improving the pressure relief efficiency and stability of the battery 21.

[0063] In some embodiments, one edge of the partition 1111 can be connected to the inner wall of the pressure relief channel 1100, and the other edge of the partition 1111 can be spaced apart from the inner wall of the pressure relief channel 1100, thereby dividing the pressure relief channel 1100 into two sub-channels 1101 distributed along the second direction Y, and forming a through hole 1112 between the other edge of the partition 1111 and the inner wall of the pressure relief channel 1100. This facilitates communication between the two sub-channels 1101, and simplifies the fabrication of the first support beam 111 due to the simplified structure of the partition 1111.

[0064] In some embodiments, a baffle 1113 may be provided in the pressure relief channel 1100. In the second direction Y, the baffle 1113 and the partition 1111 are arranged at intervals relative to each other. The orthographic projection of the baffle 1113 on the projection plane perpendicular to the second direction Y at least partially overlaps with the orthographic projection of the through hole 1112 on the projection plane perpendicular to the second direction Y. Thus, while the batteries 21 on both sides of the first support beam 111 along the second direction Y share the pressure relief channel 1100 of the first support beam 111, when liquid and high-temperature gas from the battery 21 on one side of the first support beam 111 along the second direction Y enter the pressure relief channel 1100, the baffle 1113 can shield the liquid and high-temperature gas, preventing the liquid and high-temperature gas from impacting the battery 21 on the other side of the first support beam 111 along the second direction Y and affecting the battery 21 on the other side of the first support beam 111 along the second direction Y.

[0065] In this configuration, on a projection plane perpendicular to the second direction Y, the orthographic projection of the baffle 1113 overlaps the orthographic projection of the through hole 1112. This further enhances the shielding effect of the baffle 1113 against liquids and high-temperature gases, thereby further reducing the risk of liquids and high-temperature gases impacting the battery 21 on the other side of the first support beam 111 along the second direction Y.

[0066] Specifically, one edge of the partition 1111 can be connected to the inner wall of the pressure relief channel 1100 along the third direction Z, and the other edge of the partition 1111 can be spaced apart from the inner wall of the pressure relief channel 1100 along the other direction Z, with the first direction X, the second direction Y, and the third direction Z forming an angle with each other. Thus, the partition 1111 can divide the pressure relief channel 1100 into two sub-channels 1101 distributed along the second direction Y, and a through hole 1112 connecting the two sub-channels 1101 can be formed between the other edge of the partition 1111 and the inner wall of the pressure relief channel 1100 along the other direction Z.

[0067] The baffle 1113 is located on one side of the partition 1111 along the second direction Y. One edge of the baffle 1113 is connected to the inner wall of the pressure relief channel 1100 along the third direction Z on the other side. The other edge of the partition 1111 is spaced apart from the inner wall of the pressure relief channel 1100 along the third direction Z on the other side. This allows the partition 1111 to effectively block the through hole 1112 and makes the processing of the baffle 1113 and the partition 1111 more convenient, which helps to reduce the processing cost of the first support beam 111.

[0068] In some embodiments, such as Figures 4 to 6As shown, the battery box 10 may also include a bracket 115 located on the side of the support beam 110 facing the receiving cavity 113. The bracket 115 has a positioning groove 1151 on the side opposite to the corresponding support beam 110, communicating with the pressure relief hole 1102. The positioning groove 1151 is used to insert the end of the battery 21 equipped with the explosion-proof valve, thereby positioning the battery 21 and the bracket 115. By inserting the end of the battery 21 equipped with the explosion-proof valve into the positioning groove 1151 of the bracket 115 and connecting the bracket 115 to the support beam 110, the explosion-proof valve of the battery 21 can be accurately aligned with the pressure relief hole 1102 of the support beam 110, thus improving the installation efficiency of the battery 21.

[0069] A positioning protrusion 1152 can be provided on the side of the bracket 115 facing the corresponding support beam 110. The positioning protrusion 1152 is inserted into the pressure relief hole 1102 to position the bracket 115 and the support beam 110. By inserting the positioning protrusion 1152 of the bracket 115 into the pressure relief hole 1102, the relative position of the bracket 115 and the support beam 110 can be positioned, thereby positioning the relative position of the battery 21 and the support beam 110, which helps to further improve the installation efficiency of the battery 21.

[0070] Specifically, the bracket 115 extends along the first direction X. Multiple positioning protrusions 1152 are provided on the side of the bracket 115 facing the corresponding support beam 110. The multiple positioning protrusions 1152 are spaced apart along the length of the bracket 115. The multiple positioning protrusions 1152 of the bracket 115 are used to be inserted one-to-one into the multiple pressure relief holes 1102 of the support beam 110 to position the bracket 115 and the support beam 110. Multiple positioning grooves 1151 are provided on the side of the bracket 115 away from the corresponding support beam 110. The multiple positioning grooves 1151 are spaced apart along the length of the bracket 115. The ends of the batteries 21 near the bracket 115, each equipped with an explosion-proof valve, are inserted one-to-one into the multiple positioning grooves 1151 to position the batteries 21 and the bracket 115.

[0071] In some embodiments, such as Figure 7 and Figure 8 As shown, the support beam 110 can include second support beams 112 located on both sides of the frame 11 along the second direction Y. At least one second support beam 112 has a collapsible energy-absorbing element 116 on the side facing the receiving cavity 113. The structural strength of the collapsible energy-absorbing element 116 is less than the structural strength of the second support beam 112 and the structural strength of the battery 21. Therefore, when the side of the second support beam 112 facing away from the receiving cavity 113 is impacted or compressed, the collapsible energy-absorbing element 116 can absorb the impact or compression force, preventing the impact or compression force from being transmitted to the battery 21 and causing deformation or even damage to the battery 21.

[0072] Among them, a clearance hole 1161 can be opened at the position of the collapsible energy absorption component 116 corresponding to the pressure relief hole 1102, so that after the explosion-proof valve of the battery 21 is opened, the liquid and high-temperature gas in the battery 21 can be discharged through the clearance hole 1161 to the pressure relief hole 1102 and enter the pressure relief channel 1100 of the second support beam 112.

[0073] In some embodiments, on a projection plane perpendicular to the second direction Y, the orthographic projection of the clearance hole 1161 can cover the orthographic projection of the pressure relief hole 1102, so that the liquid and high-temperature gas in the battery 21 can be discharged more smoothly through the clearance hole 1161 to the pressure relief hole 1102.

[0074] Of course, the orthographic projection of the clearance hole 1161 on the projection plane perpendicular to the second direction Y can also partially overlap with the orthographic projection of the pressure relief hole 1102 on the projection plane perpendicular to the second direction Y, or the orthographic projection of the pressure relief hole 1102 on the projection plane perpendicular to the second direction Y can cover the orthographic projection of the clearance hole 1161 on the projection plane perpendicular to the second direction Y.

[0075] Continue to refer to Figure 7 and Figure 8 When the battery box 10 includes a bracket 115, the bracket 115 can be positioned on the side of the collapsible energy-absorbing member 116 away from the second support beam 112, so that the battery 21 can be quickly positioned by the bracket 115.

[0076] The bracket 115 can be provided with a positioning protrusion 1152 on one side facing the corresponding support beam 110. The positioning protrusion 1152 is inserted into the clearance hole 1161 to position the bracket 115 and the collapsible energy-absorbing component 116, so that the explosion-proof valve of the battery 21 quickly aligns with the position of the clearance hole 1161 of the collapsible energy-absorbing component 116, thereby improving the installation efficiency of the battery 21.

[0077] Specifically, the collapsible energy-absorbing element 116 can be extended along the length direction of the second support beam 112 to increase the length of the collapsible energy-absorbing element 116, so that the collapsible energy-absorbing element 116 can have a better collapsible energy-absorbing effect on different parts of the second support beam 112 along its length direction.

[0078] On the cross section perpendicular to the first direction X, the cross-sectional shape of the collapsible energy absorber 116 is a rectangular ring, which makes the structure of the collapsible energy absorber 116 relatively simple, easy to process, and the collapsible energy absorber 116 has a good collapsible energy absorption effect.

[0079] like Figure 3As shown, the frame 11 also includes a rear beam 114 extending along the second direction Y. The rear beam 114 is connected to one end of the support beam 110 along the first direction X. The rear beam 114 has a pressure relief chamber communicating with the pressure relief channel 1100. At least one pressure relief valve communicating with the pressure relief chamber is provided on the side of the rear beam 114 opposite to the support beam 110. Thus, liquid and high-temperature gas discharged into the pressure relief channel 1100 of the support beam 110 can be transferred to the pressure relief chamber of the rear beam 114 and discharged through the pressure relief valve.

[0080] The number of pressure relief valves can be multiple. Multiple pressure relief valves are spaced apart along the length of the rear beam 114, which helps to further improve the discharge efficiency of liquid and high-temperature gas in the pressure relief chamber.

[0081] like Figure 1 As shown, the battery box 10 also includes a bottom protective plate 117 connected to the frame 11, with one side of the bottom protective plate 117 facing the receiving cavity 113. In some embodiments, the thickness of the bottom protective plate 117 can be greater than or equal to 3 mm to improve the structural strength of the bottom protective plate 117, thereby further improving the protection effect on the battery 21. The thickness of the bottom protective plate 117 can be 3.2 mm, 3.7 mm, 4 mm, 4.6 mm, 5 mm, 5.3 mm, or 6 mm, and can be determined according to factors such as the material and shape of the bottom protective plate 117.

[0082] In some embodiments, a buffer plate 118 may be provided on the side of the bottom protective plate 117 facing the receiving cavity 113. The buffer plate 118 can form a buffer between the bottom protective plate 117 and the battery 21 to further improve the protection effect of the battery 21. The material of the buffer plate 118 can be a buffer material such as silicone or foam, and there is no limitation here.

[0083] In some embodiments, a support plate 119 may be provided on the side of the buffer plate 118 opposite to the bottom protective plate 117. The side of the support plate 119 opposite to the buffer plate 118 is used to abut against the outer peripheral surface of the battery 21, thereby providing a certain supporting and positioning function for the battery 21 and making the position of the battery 21 more stable. Specifically, the battery 21 is a cylindrical battery 21. The side of the support plate 119 opposite to the buffer plate 118 has a concave surface that is adapted to the outer peripheral surface of the battery 21, and a portion of the outer peripheral surface of the battery 21 contacts the concave surface of the buffer plate 118.

[0084] This application also provides a battery pack, which includes a battery box. The specific structure of the battery box is as described in the above embodiments. Since this 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 described in detail here.

[0085] The battery pack 1 includes a battery box 10 and a battery module 20. The structure of the battery box 10 can be referred to in the above embodiments, and will not be repeated here. The battery module 20 includes a battery 21 installed in the receiving cavity 113 of the battery box 10. One end of the battery 21 along the second direction Y is provided with an explosion-proof valve.

[0086] In some embodiments, the length of the battery 21 in the second direction Y can be greater than or equal to 140 mm. Therefore, the battery box 10 provided in this application embodiment can accommodate a relatively long battery 21 without increasing the overall height, which is beneficial for improving the applicability of the battery box 10.

[0087] The length of battery 21 in the second direction Y can be 143mm, 147mm, 150mm, 155mm, 160mm, 170mm, etc., and is not limited here. In addition, the outer diameter of battery 21 can be 46mm or other dimensions, and is not limited here.

[0088] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A battery box, characterized in that, The device includes a frame, the frame including a support beam extending along a first direction, and a receiving cavity located on at least one side of the support beam along a second direction, the receiving cavity being used to receive a battery, the second direction being arranged at an angle to the first direction; The support beam has a pressure relief channel extending along its length, and a pressure relief hole communicating with the pressure relief channel is formed on the side of the support beam facing the receiving cavity. The pressure relief hole is configured to correspond to the explosion-proof valve of the battery located near one end of the support beam along the second direction.

2. The battery box as described in claim 1, characterized in that, On a projection plane perpendicular to the second direction, the orthographic projection of the pressure relief hole overlaps with the orthographic projection of the explosion-proof valve corresponding to the battery.

3. The battery box as described in claim 1, characterized in that, The frame includes a plurality of support beams and a plurality of receiving cavities, which are alternately arranged in the second direction.

4. The battery box as described in claim 2, characterized in that, The support beam includes a first support beam located between the two accommodating cavities, and the first support beam has pressure relief holes on both sides along the second direction.

5. The battery box as described in claim 4, characterized in that, The pressure relief channel is provided with a partition extending along the length of the first support beam. The partition divides the pressure relief channel into two sub-channels distributed along the second direction. The two sub-channels are connected to the pressure relief holes on both sides of the first support beam.

6. The battery box as described in claim 5, characterized in that, The partition has a through hole connecting the two sub-channels.

7. The battery box as described in claim 6, characterized in that, One side edge of the partition is connected to the inner wall of the pressure relief channel, and the other side edge of the partition is spaced apart from the inner wall of the pressure relief channel to divide the pressure relief channel into two sub-channels distributed along the second direction, and the through hole is formed between the other side edge of the partition and the inner wall of the pressure relief channel.

8. The battery box as described in claim 6, characterized in that, The pressure relief channel is provided with a baffle. On the projection plane perpendicular to the second direction, the baffle and the partition are arranged at intervals, and the orthographic projection of the baffle and the orthographic projection of the through hole at least partially overlap.

9. The battery box as described in claim 8, characterized in that, On a projection plane perpendicular to the second direction, the orthographic projection of the baffle covers the orthographic projection of the via.

10. The battery box as claimed in claim 8, characterized in that, One edge of the partition is connected to the inner wall of the pressure relief channel along the third direction, and the other edge of the partition is spaced apart from the inner wall of the pressure relief channel along the third direction. The first direction, the second direction and the third direction form an angle with each other. The baffle is located on one side of the partition along the second direction. One edge of the baffle is connected to the inner wall of the pressure relief channel along the third direction on the other side. The other edge of the partition is spaced apart from the inner wall of the pressure relief channel along the third direction on the other side.

11. The battery box as described in any one of claims 1 to 10, characterized in that, The battery box also includes a bracket disposed on the side of the support beam facing the receiving cavity. The bracket has a positioning groove on the side opposite to the corresponding support beam that communicates with the pressure relief hole. The positioning groove is used for inserting the end of the battery with the explosion-proof valve to position the battery and the bracket.

12. The battery box as described in claim 11, characterized in that, The bracket has a positioning protrusion on one side facing the corresponding support beam. The positioning protrusion is inserted into the pressure relief hole to position the bracket and the support beam.

13. The battery box as described in claim 11, characterized in that, The support beam includes a second support beam located on both sides of the frame along the second direction, and at least one of the second support beams is provided with a collapsible energy-absorbing element on the side facing the receiving cavity. The structural strength of the collapsible energy-absorbing element is less than the structural strength of the second support beam and the structural strength of the battery.

14. The battery box as described in claim 13, characterized in that, The collapsible energy-absorbing component has an avoidance hole at the position corresponding to the pressure relief hole.

15. The battery box as described in claim 14, characterized in that, On a projection plane perpendicular to the second direction, the orthographic projection of the clearance hole overlaps the orthographic projection of the pressure relief hole.

16. The battery box as claimed in claim 14, characterized in that, The bracket is located on the side of the collapsible energy-absorbing component opposite to the second support beam.

17. The battery box as claimed in claim 16, characterized in that, The bracket has a positioning protrusion on one side facing the corresponding support beam. The positioning protrusion is inserted into the clearance hole to position the bracket and the collapsible energy-absorbing component.

18. The battery box as claimed in claim 13, characterized in that, The collapsible energy-absorbing element extends along the length of the second support beam; in a section perpendicular to the first direction, the cross-sectional shape of the collapsible energy-absorbing element is a rectangular ring.

19. The battery box as described in any one of claims 1 to 10, characterized in that, The frame also includes a rear beam extending along the second direction, the rear beam being connected to one end of the support beam along the first direction, the rear beam having a pressure relief chamber communicating with the pressure relief channel, and at least one pressure relief valve communicating with the pressure relief chamber being provided on the side of the rear beam opposite to the support beam.

20. The battery box according to any one of claims 1 to 10, characterized in that, The battery box also includes a bottom protective plate connected to the frame, with one side of the bottom protective plate facing the receiving cavity; the thickness of the bottom protective plate is greater than or equal to 3mm.

21. The battery box according to any one of claims 1 to 10, characterized in that, The battery box also includes a bottom protective plate connected to the frame, with one side of the bottom protective plate facing the receiving cavity; a buffer plate is provided on the side of the bottom protective plate facing the receiving cavity.

22. The battery box as claimed in claim 21, characterized in that, A support plate is provided on the side of the buffer plate opposite to the bottom protective plate, and the side of the support plate opposite to the buffer plate is used to abut against the outer peripheral surface of the battery.

23. A battery pack, characterized in that, include: A battery box, wherein the battery box is the battery box according to any one of claims 1 to 22; The battery module includes a battery installed in the receiving cavity of the battery box, and an explosion-proof valve is provided at one end of the battery along a second direction.

24. The battery pack as claimed in claim 23, characterized in that, The length of the battery in the second direction is greater than or equal to 140 mm.

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