Battery box and electric equipment

Abstract

The invention discloses a battery box and electric equipment, the battery box comprises a box body, a battery bracket, a liquid cooling module and a battery module, and the box body is internally provided with an accommodating cavity; the battery support is arranged in the containing cavity and comprises a first top plate and a first bottom plate which are oppositely arranged and a plurality of supporting frames connected with the first top plate and the first bottom plate, the first bottom plate is fixedly connected with the bottom of the box body, and the multiple supporting frames are annularly arranged on the edge of the first bottom plate; the battery module is arranged on the side, close to the first top plate, of the first bottom plate. The liquid cooling module comprises a lower liquid cooling plate arranged between the first bottom plate and the battery module, and the lower liquid cooling plate is fixedly connected with the first bottom plate; the battery module is slidably connected to the lower liquid cooling plate, so that the battery module can be assembled and disassembled through sliding, and the assembly efficiency and maintenance convenience of the battery module are improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a battery box and electrical equipment. Background Art

[0002] With the continuous development of lithium-ion batteries, the heat dissipation of the battery box, as the core of the entire power system, has received more and more attention. At present, battery packs generally adopt a single bottom liquid cooling design, which leads to a large temperature difference between the upper and lower parts of the battery pack. Especially during rapid charging and discharging and low-temperature preheating, the heat dissipation efficiency is low, which can easily cause battery overheating, shorten service life, and even cause thermal runaway.

[0003] In the related art, when thermal runaway occurs in the battery pack structure, the heat and liquid eruption between the battery cells can easily come into contact with other battery cells, causing the thermal runaway to spread, increasing safety hazards; existing designs cannot effectively suppress heat propagation, further increasing the risk of the battery pack. Summary of the invention

[0004] The embodiments of the present application provide a battery box and an electrical device to solve or at least partially solve the deficiencies of the above-mentioned background technology.

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

[0006] A box body, provided with a containing cavity;

[0007] A battery holder is arranged in the accommodating cavity, the battery holder comprises a first top plate and a first bottom plate which are arranged opposite to each other, and a plurality of support frames connecting the first top plate and the first bottom plate, the first bottom plate is fixedly connected to the bottom of the box body, and the plurality of support frames are arranged around the edge of the first bottom plate;

[0008] A battery module is arranged on a side of the first bottom plate close to the first top plate;

[0009] A liquid cooling module, comprising a lower liquid cooling plate disposed between the first bottom plate and the battery module, and the lower liquid cooling plate is fixedly connected to the first bottom plate;

[0010] Wherein, the battery module is slidably connected to the lower liquid cooling plate.

[0011] In a second aspect, an embodiment of the present application provides an electrical device, wherein the electrical device comprises any of the battery boxes described above.

[0012] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a battery box and electrical equipment, the battery box comprising a box body, a battery holder, a liquid cooling module and a battery module, the box body being provided with a accommodating cavity; the battery holder being arranged in the accommodating cavity, the battery holder comprising a first top plate and a first bottom plate arranged opposite to each other, and a plurality of support frames connecting the first top plate and the first bottom plate, the first bottom plate being fixedly connected to the bottom of the box body, and a plurality of support frames being arranged around the edge of the first bottom plate; the battery module being arranged on a side of the first bottom plate close to the first top plate; the liquid cooling module comprising a lower liquid cooling plate arranged between the first bottom plate and the battery module, and the lower liquid cooling plate being fixedly connected to the first bottom plate, and the battery module being slidably connected to the lower liquid cooling plate, so that the battery module can be flexibly assembled or disassembled, thereby improving the assembly efficiency and maintenance convenience of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution in this embodiment, the drawings required for use in the description of the embodiment 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 paying any creative work.

[0014] Figure 1 A schematic diagram of the structure of a battery box provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the exploded structure of a battery box provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of the assembled structure of the battery module, liquid cooling module and battery cell support provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of the structure of the battery module and the lower liquid cooling plate after assembly provided in an embodiment of the present application;

[0018] Figure 5 A schematic diagram of the structure of the battery module and the lower liquid cooling plate provided in the embodiment of the present application when sliding;

[0019] Figure 6 A schematic diagram of the structure of the lower liquid cooling plate provided in an embodiment of the present application;

[0020] Figure 7 A schematic diagram of the structure of a battery cell support provided in an embodiment of the present application;

[0021] Figure 8 A schematic diagram of the structure of the upper liquid cooling plate provided in an embodiment of the present application;

[0022] Fig. 9 A schematic diagram of the exploded structure of a battery bracket provided in an embodiment of the present application;

[0023] Fig.10 A schematic diagram of the structure of the battery bracket provided in an embodiment of the present application in an unfolded state;

[0024] Fig.11 A schematic diagram of the explosion structure of a battery module provided in an embodiment of the present application;

[0025] Fig.12 This is a schematic diagram of the structure of the heat insulation board provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1-battery box; 11-box; 12-battery bracket; 13-liquid cooling module; 14-battery module; 15-support module; 16-copper busbar; 17-air cooling module; 18-heat insulation board;

[0028] 110 - accommodating chamber; 111 - second bottom plate; 113 - side plate; 112 - second top plate;

[0029] 1131-first side panel; 1132-second side panel; 11311-air inlet; 11321-air outlet;

[0030] 120-folding connection part; 121-first top plate; 122-first bottom plate; 123-support frame; 124-first fixing part; 125-second fixing part; 126-third fixing part; 127-fourth fixing part; 128-first baffle frame; 129-second baffle frame; 1231-first support frame; 1232-second support frame; 1233-third support frame; 1234-fourth support frame; 1241-first clamping part; 1242-first limiting part; 1251-second clamping part; 1252-second limiting part; 1281-first baffle plate; 1291-second baffle plate;

[0031] 131-lower liquid cooling plate; 132-upper liquid cooling plate; 1311-first guide rail; 1312-first main body; 1313-first liquid cooling part; 13111-first sub-guide rail; 13112-second sub-guide rail; 13131-first liquid cooling sub-part; 13132-second liquid cooling sub-part; 1321-second main body; 1322-second liquid cooling part; 1323 first positioning part; 1324-second positioning part;

[0032] 140-battery module; 141-first chute; 1401-battery assembly; 1402-battery bracket; 142-heat dissipation duct; 144-heat dissipation duct; 145-connecting end plate; 140A-first battery module; 14011-first battery assembly; 14021-first battery bracket; 140B second battery module; 14012-second battery assembly; 14022-second battery bracket; 1411-first sub-chute; 1412-second Sub-chute; 1413-third sub-chute; 1414-fourth sub-chute; 1420-battery cell; 14201-pressure relief valve; 1430-support part; 14311-first support part; 14312-second support part; 14313-first connecting part; 14321-third support part; 14322-fourth support part; 14323-second connecting part; 151-support sub-component; 171-fan; 181-second chute; 182-third chute. DETAILED DESCRIPTION

[0033] 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.

[0034] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4 ;in, Figure 1 A schematic diagram of the structure of a battery box provided in an embodiment of the present application; Figure 2 A schematic diagram of the exploded structure of a battery box provided in an embodiment of the present application; Figure 3 A schematic diagram of the assembled structure of the battery module, liquid cooling module and battery cell support provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of the battery module and the lower liquid cooling plate after assembly provided in an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the battery module and the lower liquid cooling plate provided in an embodiment of the present application when sliding.

[0035] The present application provides a battery box 1, which includes a box body 11, a battery bracket 12, a liquid cooling module 13 and a battery module 14; the box body 11 is used to provide overall structural support and protection functions for the battery box 1, and a receiving cavity 110 is provided in the box body 11, and the receiving cavity 110 is used to accommodate and fix internal components such as the battery bracket 12, the liquid cooling module 13 and the battery module 14; the battery bracket 12 is used to provide stable support and positioning for the battery module 14, and the battery bracket 12 is arranged at the In the accommodating cavity 110, the battery module 14 is arranged in the battery holder 12, and the battery holder 12 is used to prevent the battery module 14 from shaking or displacing during transportation or operation; the liquid cooling module 13 is arranged in the battery holder 12, and the liquid cooling module 13 and the battery module 14 are in contact with each other. The liquid cooling module 13 is used to provide heat dissipation for the battery module 14, ensuring that the battery module 14 is maintained within a suitable temperature range in various working environments, thereby ensuring the overall stability of the battery module 14.

[0036] In one embodiment, the battery holder 12 includes a first top plate 121 and a first bottom plate 122 that are relatively arranged, and a plurality of support frames 123 connecting the first top plate 121 and the first bottom plate 122 of the liquid cooling module 13, the box body 11 includes a second bottom plate 111 and a side plate 113 that are connected to each other, the second bottom plate 111 and the side plate 113 enclose the accommodating cavity 110, the first bottom plate 122 is fixedly connected to the bottom of the box body 11, and a plurality of support frames 123 are arranged around the edge of the first bottom plate 122; wherein, one end of the support frame 123 is fixedly connected to the first top plate 121, and the other end of the support frame 123 is fixedly connected to the first bottom plate 122, thereby increasing the stability of the battery holder 12 and making the battery module 14 more sturdy and durable during transportation and use.

[0037] The liquid cooling module 13 includes a lower liquid cooling plate 131 disposed between the first bottom plate 122 and the battery module 14 , and the lower liquid cooling plate 131 is fixedly connected to the first bottom plate 122 ; wherein the battery module 14 is slidably connected to the lower liquid cooling plate 131 .

[0038] It can be understood that, in this embodiment, the lower liquid cooling plate 131 is fixedly connected to the first bottom plate 122, and the battery module 14 is slidably connected to the lower liquid cooling plate 131, so that when the battery module 14 is installed or removed, the battery module 14 can easily slide into (install) or slide out (remove) a predetermined position in the battery holder 12, forming a drawer-like design, reducing the difficulty of installing the battery module 14, while improving the convenience of maintaining and replacing the battery module 14, and reducing assembly time and labor costs.

[0039] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, the liquid cooling module 13 also includes an upper liquid cooling plate 132, and the upper liquid cooling plate 132 is arranged between the first top plate 121 and the battery module 14. The upper liquid cooling plate 132 can be fixedly connected to the first top plate 121, and the battery module 14 is arranged between the upper liquid cooling plate 132 and the lower liquid cooling plate 131, and the two sides of the battery module 14 are respectively in contact with the upper liquid cooling plate 132 and the lower liquid cooling plate 131.

[0040] Specifically, the upper liquid cooling plate 132 and the lower liquid cooling plate 131 are arranged relative to each other, and the upper liquid cooling plate 132 and the lower liquid cooling plate 131 clamp the battery module 14, thereby forming an effective heat dissipation channel; it can be understood that this embodiment, by arranging the upper liquid cooling plate 132 and the liquid cooling plate, can quickly conduct and dissipate the heat generated by the battery module 14, thereby avoiding overheating of the battery module 14, significantly improving the heat dissipation efficiency of the battery module 14, and reducing the probability of thermal runaway of the battery module 14.

[0041] The lower liquid cooling plate 131 includes a first inlet (not marked in the figure) and a first outlet (not marked in the figure) that are connected to each other, and the upper liquid cooling plate 132 includes a second inlet (not marked in the figure) and a second outlet (not marked in the figure) that are connected to each other, the first inlet and the second inlet are both inlet ends of the cooling medium, and the first outlet and the second outlet are both cooling medium; specifically, the cooling medium enters the lower liquid cooling plate 131 through the first inlet, flows along a predetermined path in the lower liquid cooling plate 131, and after absorbing the heat on the lower side of the battery module 14, the liquid cooling medium is discharged from the first outlet; at the same time, the cooling medium also enters the upper liquid cooling plate 132 through the second inlet, flows in the upper liquid cooling plate 132, and after absorbing the heat on the upper side of the battery module 14, is discharged through the second outlet, thereby achieving a double-sided cooling effect.

[0042] It should be noted that, in this embodiment, the structure of the cooling channel in the lower liquid cooling plate 131 and the structure of the cooling channel in the upper liquid cooling plate 132 can be adjusted according to design requirements to ensure that the cooling medium can fully absorb the heat of the battery module 14, thereby improving the heat dissipation efficiency and temperature uniformity of the entire battery box 1; in addition, the shape, size and arrangement of the cooling channel can be optimized according to cooling requirements to achieve the best heat dissipation effect, and this embodiment does not impose specific restrictions on this.

[0043] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, the battery box 1 further includes a support module 15, which is disposed between the battery bracket 12 and the second bottom plate 111, one side of the support module 15 is fixedly connected to the first bottom plate 122, and the other side of the support module 15 is fixedly connected to the second bottom plate 111.

[0044] Specifically, the support module 15 includes a plurality of support sub-components 151, and the plurality of support sub-components 151 are arranged around the edge of the second bottom plate 111. The support sub-components 151 are arranged between the first bottom plate 122 and the second bottom plate 111, and one end of the support sub-component 151 is fixedly connected to the first bottom plate 122, and the other end of the support sub-component 151 is fixedly connected to the second bottom plate 111, thereby further preventing the battery holder 12 from being deformed or moved due to external pressure or vibration, and enhancing the structural stability of the battery box 1.

[0045] Please combine Figure 2 , Figure 4 , Figure 5 and Figure 6 ;in, Figure 6 This is a schematic diagram of the structure of the lower liquid cooling plate provided in an embodiment of the present application.

[0046] In one embodiment, a first guide rail 1311 is provided on one side of the lower liquid cooling plate 131 close to the battery module 14, and a first slide groove 141 is provided on one side of the battery module 14 close to the lower liquid cooling plate 131, and the first guide rail 1311 is embedded in the corresponding first slide groove 141; wherein, the first slide groove 141 is slidably connected to the first guide rail 1311, and the battery module 14 can smoothly slide into or out of a predetermined position in the battery holder 12 along the extension direction of the first guide rail 1311 through the first slide groove 141 to form a convenient "drawer-type" structure, so that when the battery module 14 is installed or disassembled, there is no need to disassemble the battery holder 12 structure, thereby simplifying the assembly and disassembly operations of the battery module 14 and improving the convenience of maintaining and replacing the battery module 14.

[0047] At the same time, in this embodiment, through the cooperation of the first slide groove 141 and the first guide rail 1311, the operator can quickly slide the battery module 14 in or out, thereby reducing the assembly time of the battery module 14 and reducing the maintenance time and labor cost; and the first guide rail 1311 can provide a stable guiding effect to prevent the battery module 14 from shifting or loosening during installation or disassembly, thereby improving the reliability of assembly of the battery module 14 and the battery bracket 12.

[0048] It should be noted that the predetermined position can be a fixed position or installation position pre-designated and specified by the battery module 14. By designing the predetermined position, it can be ensured that the battery module 14 can be accurately placed in the battery holder 12 during assembly and form a stable connection with other components; wherein, the predetermined position can be flexibly adjusted according to different needs or design requirements of the battery box 1, and this embodiment does not impose specific restrictions on this.

[0049] Please combine Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ;in, Figure 7 A schematic diagram of the structure of a battery cell support provided in an embodiment of the present application.

[0050] In one embodiment, the battery module 14 includes at least one battery cell module 140, and the battery cell module 140 includes a battery cell assembly 1401 and a battery cell bracket 1402, and the battery cell bracket 1402 is arranged between the battery cell assembly 1401 and the lower liquid cooling plate 131, and the battery cell bracket 1402 is arranged around at least a portion of the side wall of the battery cell assembly 1401; wherein the battery cell bracket 1402 is fixedly connected to the battery cell assembly 1401, and the first slide groove 141 is arranged on a side of the battery cell bracket 1402 close to the lower liquid cooling plate 131.

[0051] It can be understood that in this embodiment, the cell holder 1402 is arranged between the cell assembly 1401 and the lower liquid cooling plate 131, and the cell holder 1402 is fixedly connected to the cell assembly 1401. The cell holder 1402 is arranged around at least a portion of the side wall of the cell assembly 1401, thereby wrapping and supporting the cell assembly 1401, enhancing the support and protection for the cell assembly 1401, and avoiding the cell assembly 1401 from being affected by unnecessary stress during operation or movement.

[0052] At the same time, by arranging the first slide groove 141 on the side of the battery cell bracket 1402 close to the lower liquid cooling plate 131, the first slide groove 141 is tightly matched with the first guide rail 1311, so that the battery cell assembly 1401 can maintain a firm structural position after installation, reduce the slight displacement of the battery cell assembly 1401 during operation, and improve the stability and safety of the battery cell assembly 1401.

[0053] Furthermore, the battery box 1 also includes a plurality of copper bars 16, one of the copper bars 16 is arranged corresponding to the battery cell module 140, one end of the copper bar 16 is fixedly connected to the battery cell module 140, and the other end of the copper bar 16 is fixedly connected to the box body 11; by using the copper bar 16 to fix the battery cell module 140 and the box body 11, the copper bar 16 not only serves as an electric energy conduction path, but also plays a role in supporting and stabilizing the component, thereby reducing the risk of the battery module 14 becoming loose.

[0054] Please continue to combine Figure 5 , Figure 6 and Figure 7In one embodiment, the lower liquid cooling plate 131 includes a first main body portion 1312 and a first liquid cooling portion 1313, the first liquid cooling portion 1313 is arranged on a side of the first main body portion 1312 close to the battery cell assembly 1401, the first liquid cooling portion 1313 protrudes from the first main body portion 1312 toward the direction close to the battery cell assembly 1401, the first guide rail 1311 is arranged on the first main body portion 1312, and the first guide rail 1311 is located on a side of the first liquid cooling portion 1313 close to the edge of the lower liquid cooling plate 131.

[0055] The battery cell holder 1402 includes a support portion 1430, the support portion 1430 is spaced from the first liquid cooling portion 1313, the orthographic projection of the support portion 1430 on the first main body 1312 does not overlap with the orthographic projection of the first liquid cooling portion 1313 on the first main body 1312, the support portion 1430 is provided with a first slide groove 141 on a side close to the lower liquid cooling plate 131, and the first slide groove 141 penetrates the support portion 1430 along the first direction X; wherein, the distance from the side of the first liquid cooling portion 1313 away from the first main body 1312 to the first main body 1312 is equal to the distance from the side of the support portion 1430 away from the first main body 1312 to the first main body 1312, and the first liquid cooling portion 1313 corresponds to and contacts the battery cell assembly 1401.

[0056] The first guide rail 1311 extends along the first direction X, and there is a gap between the first liquid cooling portion 1313 and the first guide rail 1311. The first guide rail 1311 is embedded in the corresponding first slide groove 141, so that the battery module 14 can slide smoothly into or out of the predetermined position in the battery holder 12 along the first direction X through the first slide groove 141 to form a convenient "drawer-type" structure; it should be noted that this embodiment only takes the first direction as Figure 5 The second direction is Figure 5 The technical solution of the present application is illustrated by taking the Y direction in which the first direction X and the second direction Y are 90 degrees as an example. This embodiment does not specifically limit the first direction, the second direction, and the angle between the first direction and the second direction.

[0057] It can be understood that, in this embodiment, the orthographic projection of the support portion 1430 on the first main body 1312 is not overlapped with the orthographic projection of the first liquid cooling portion 1313 on the first main body 1312, so that the support portion 1430 will not hinder the heat exchange between the battery cell assembly 1401 and the lower liquid cooling plate 131; at the same time, by setting the distance from the side of the first liquid cooling portion 1313 away from the first main body 1312 to the first main body 1312 to be equal to the distance from the side of the support portion 1430 away from the first main body 1312 to the first main body 1312, the first liquid cooling portion 1313 and the battery cell assembly 1401 correspond to and contact each other, ensuring that there is a good thermal contact surface between the battery cell assembly 1401 and the lower liquid cooling plate 131, and the heat generated by the battery cell assembly 1401 during operation can be more effectively conducted through the lower liquid cooling plate 131, which helps to maintain the normal heat dissipation efficiency of the battery cell assembly 1401 and control the operating temperature of the battery module 14.

[0058] Please continue to combine Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 ;in, Figure 8 A schematic diagram of the structure of the upper liquid cooling plate provided in an embodiment of the present application; Fig. 9 A schematic diagram of the exploded structure of the battery bracket provided in an embodiment of the present application.

[0059] In one embodiment, the upper liquid cooling plate 132 includes a second main body portion 1321, a second liquid cooling portion 1322 arranged on a side of the second main body portion 1321 close to the battery module 14, and a first positioning portion 1323 and a second positioning portion 1324 located on both sides of the second liquid cooling portion 1322; wherein, the second liquid cooling portion 1322 protrudes from the second main body portion 1321 toward a direction close to the battery cell assembly 1401, and the first positioning portion 1323, the second liquid cooling portion 1322 and the second positioning portion 1324 are arranged in sequence along the second direction Y.

[0060] The battery holder 12 includes a first fixing portion 124 and a second fixing portion 125 that are relatively arranged along the second direction Y, the first fixing portion 124 and the support frame 123 are fixedly connected, and the second fixing portion 125 and the support frame 123 are fixedly connected; wherein, the first fixing portion 124 abuts against at least a portion of the first positioning portion 1323, the second fixing portion 125 abuts against at least a portion of the second positioning portion 1324, and the second liquid cooling portion 1322 corresponds to and contacts the battery cell assembly 1401.

[0061] It can be understood that, in this embodiment, the first positioning portion 1323 and the second positioning portion 1324 of the upper liquid cooling plate 132 are respectively abutted against the first fixing portion 124 and the second fixing portion 125 of the battery holder 12, thereby ensuring the fixity and positioning accuracy between the upper liquid cooling plate 132 and the battery holder 12, effectively limiting the displacement of the upper liquid cooling plate 132 in the second direction Y, preventing it from lateral shaking during operation, and thereby improving the stability of the connection between the upper liquid cooling plate 132 and the battery holder 12.

[0062] At the same time, by setting the second liquid cooling part 1322 to correspond to and contact the battery cell assembly 1401, and the first liquid cooling part 1313 to correspond to and contact the battery cell assembly 1401, liquid cooling heat dissipation channels can be formed on the top and bottom of the battery cell assembly 1401, thereby effectively enhancing the overall heat dissipation capacity of the battery module 14, allowing heat to be more evenly distributed in various parts of the battery module 14, avoiding local overheating, further reducing the risk of thermal runaway, and extending the service life of the battery module 14.

[0063] Further, the first fixing portion 124 includes a first clamping portion 1241 and a first limiting portion 1242, the first limiting portion 1242 is located on one side of the upper liquid cooling plate 132, the first clamping portion 1241 extends from the first limiting portion 1242 toward the direction close to the first positioning portion 1323, and the side of the first limiting portion 1242 close to the upper liquid cooling plate 132 abuts against the side of the upper liquid cooling plate 132 close to the first limiting portion 1242, and the side of the first clamping portion 1241 close to the first positioning portion 1323 abuts against the side of the first positioning portion 1323 close to the first clamping portion 1241.

[0064] The second fixing portion 125 includes a second clamping portion 1251 and a second limiting portion 1252, the second limiting portion 1252 is located on the other side of the upper liquid cooling plate 132, the second clamping portion 1251 extends from the second limiting portion 1252 toward the direction close to the second positioning portion 1324, and the side of the second limiting portion 1252 close to the upper liquid cooling plate 132 abuts against the side of the upper liquid cooling plate 132 close to the second limiting portion 1252, and the side of the second clamping portion 1251 close to the first positioning portion 1323 abuts against the side of the first positioning portion 1323 close to the second clamping portion 1251.

[0065] It can be understood that, in this embodiment, the first limiting portion 1242 is arranged on one side of the upper liquid cooling plate 132, and the side of the first limiting portion 1242 close to the upper liquid cooling plate 132 abuts against the side of the upper liquid cooling plate 132 close to the first limiting portion 1242, and the second limiting portion 1252 is arranged on the other side of the upper liquid cooling plate 132, and the side of the second limiting portion 1252 close to the upper liquid cooling plate 132 abuts against the side of the upper liquid cooling plate 132 close to the second limiting portion 1252, thereby effectively limiting the displacement of the upper liquid cooling plate 132 in the second direction Y to prevent it from lateral shaking during operation, thereby improving the stability of the connection between the upper liquid cooling plate 132 and the battery bracket 12.

[0066] At the same time, by setting the side of the first clamping portion 1241 close to the first positioning portion 1323 to abut against the side of the first positioning portion 1323 close to the first clamping portion 1241, and the side of the second clamping portion 1251 close to the first positioning portion 1323 to abut against the side of the first positioning portion 1323 close to the second clamping portion 1251, the displacement of the upper liquid cooling plate 132 in the third direction Z is effectively limited to prevent it from lateral shaking during operation, thereby further improving the stability of the connection between the upper liquid cooling plate 132 and the battery bracket 12.

[0067] It should be noted that, in this embodiment, the third direction Z may be a direction from the first bottom plate 122 to the first top plate 121. Fig. 9 The Z direction in .

[0068] Please continue to combine Figure 3 , Figure 4 , Figure 6 and Fig. 9 In one embodiment, the battery holder 12 includes a third fixing portion 126 and a fourth fixing portion 127 which are relatively arranged along the second direction Y, and the third fixing portion 126 and the fourth fixing portion 127 are both fixedly connected to the first bottom plate 122; wherein the two ends of the battery module 14 correspond to and abut against the first fixing portion 124 and the second fixing portion 125 respectively.

[0069] It can be understood that, in this embodiment, the third fixing portion 126 and the fourth fixing portion 127 are arranged relatively along the second direction Y, and form corresponding abutments with the two ends of the battery module 14, thereby strengthening the fixation of the lower liquid cooling plate 131, effectively limiting the displacement of the lower liquid cooling plate 131 in the second direction Y, preventing it from lateral shaking during operation, and thereby improving the stability of the connection between the lower liquid cooling plate 131 and the battery bracket 12.

[0070] Please combine Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig.10 ;in, Fig.10 A schematic structural diagram of a battery holder provided in an embodiment of the present application in an unfolded state.

[0071] In one embodiment, the battery holder 12 includes a first baffle frame 128 and a second baffle frame 129 which are arranged opposite to each other along a first direction X, wherein the first baffle frame 128 is located between two adjacent support frames 123, and the second baffle frame 129 is located between two adjacent support frames 123; wherein, when the first baffle frame 128 and / or the second baffle frame 129 are opened, the first baffle frame 128 and / or the second baffle frame 129 are rotatably connected to the first bottom plate 122; and when the first baffle frame 128 and / or the second baffle frame 129 are closed, the first baffle frame 128 and / or the second baffle frame 129 are fixedly connected to the support frame 123.

[0072] Specifically, the first baffle 128 and the second baffle 129 are respectively arranged between adjacent support frames 123 to form a transverse structural frame. The first baffle 128 and the second baffle 129 function to further restrain and stabilize the battery module 14 through transverse fixation to prevent it from displacement during operation.

[0073] Please continue to combine Figure 2 , Figure 3 , Figure 4 , Figure 5 and Fig.10 In one embodiment, the first baffle 128 includes a first baffle 1281, which is rotatably connected to the lower liquid cooling plate 131, and the second baffle 129 includes a second baffle 1291, which is rotatably connected to the lower liquid cooling plate 131; wherein the thickness of the first baffle 1281 is less than the thickness of the liquid cooling plate, and the thickness of the second baffle 1291 is less than the thickness of the liquid cooling plate.

[0074] Specifically, the battery bracket 12 includes a first support frame 1231, a second support frame 1232, a third support frame 1233 and a fourth support frame 1234, wherein the first support frame 1231, the second support frame 1232, the third support frame 1233 and the fourth support frame 1234 are arranged around the edge of the first bottom plate 122, wherein the first support frame 1231 and the second support frame 1232 are arranged relatively to each other along the second direction Y, the third support frame 1233 and the fourth support frame 1234 are arranged relatively to each other along the second direction Y, and the first support frame 1231 and the second support frame 1232 are arranged relatively to each other along the second direction Y. The third support frame 1233 is relatively arranged along the first direction X, and the second support frame 1232 and the fourth support frame 1234 are relatively arranged along the first direction X; wherein, when the first baffle frame 128 is closed, one end of the first baffle frame 128 is fixedly connected to the third support frame 1233, and the other end of the first baffle frame 128 is fixedly connected to the fourth support frame 1234; when the second baffle frame 129 is closed, one end of the second baffle frame 129 is fixedly connected to the first support frame 1231, and the other end of the second baffle frame 129 is fixedly connected to the second support frame 1232.

[0075] It can be understood that the design of the first baffle frame 128 and the second baffle frame 129 can not only be opened when the battery module 14 is installed and removed, but also be closed after the battery module 14 is installed, and form a fixed connection with the support frame 123. This flexible design can provide different support and fixing functions in different states according to needs; wherein, when the first baffle frame 128 and / or the second baffle frame 129 are opened, the first baffle frame 128 and / or the second baffle are rotatably connected to the first bottom plate 122, and the thickness of the first baffle plate 1281 is set to be smaller than the thickness of the liquid cooling plate, and the thickness of the second baffle plate 1291 is set to be smaller than the thickness of the liquid cooling plate, thereby facilitating the installation or removal process of the battery module 14; when the first baffle frame 128 and / or the second baffle frame 129 are closed, the first baffle frame 128 and / or the second baffle will be fixedly connected to the support frame 123 to form a stable frame structure, thereby further fixing the battery module 14.

[0076] It should be noted that the battery holder 12 also includes a folding connection portion 120, and the first baffle frame 128 is rotatably connected to the first bottom plate 122 via the folding connection portion 120, and the second baffle frame 129 is rotatably connected to the first bottom plate 122 via the folding connection portion 120; wherein the folding connection portion 120 may include a hinge or other structure that can fold the door leaf, and this embodiment does not impose any specific restrictions on this.

[0077] Please continue to combine Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, the battery cell assembly 1401 includes a plurality of battery cells 1420 spaced apart along a second direction Y, and the plurality of battery cells 1420 may be electrically connected via electrode copper busbars; wherein the battery cell 1420 includes a pressure relief valve 14201, and the pressure relief valve 14201 is disposed on one side of the battery cell close to the side plate 113.

[0078] Specifically, the box body 11 includes a second bottom plate 111 and a second top plate 112 that are relatively arranged, and a plurality of side plates 113, wherein the plurality of side plates 113 are arranged between the second top plate 112 and the second bottom plate 111, and the second top plate 112, the second bottom plate 111 and the plurality of side plates 113 enclose the accommodating cavity 110, the battery holder 12 is arranged in the accommodating cavity 110, the battery cell assembly 1401 is arranged between the first top plate 121 and the second bottom plate 111 of the battery holder 12, and the pressure relief valve 14201 of the battery cell 1420 is arranged on a side of the battery cell 1420 close to the side plate 113, so that the battery cell 1420 can be arranged in a side-standing manner in the battery box 1, so that the battery module 14 is more compact, saving space of the battery box 1 in the third direction Z.

[0079] It can be understood that the battery module 14 is arranged in a side-standing manner, which can effectively reduce the height of the battery module 14. When the battery module 14 is applied to a vehicle, by reducing the height of the battery module 14, not only more space in the vehicle can be released, but also the vehicle design and layout can be optimized; at the same time, the battery cell 1420 arranged in a side-standing manner has high flexibility and replaceability in design and manufacturing, and can adapt to a combination of electrical equipment with different capacity requirements.

[0080] At the same time, it should be noted that when a battery cell experiences thermal runaway, the electrolyte in the battery cell will evaporate rapidly, accompanied by the spraying of gas and liquid under high temperature and high pressure. In the related art, since the battery cells are usually placed horizontally or densely arranged, when a battery cell sprays liquid or gas, the battery cells around it are easily affected, thereby forming a chain reaction and causing large-scale runaway. In this embodiment, the pressure relief valve 14201 of the battery cell 1420 is set on the side of the battery cell 1420 close to the side plate 113. When the internal pressure of the battery cell 1420 is too high, the pressure relief valve 14201 will preferentially release pressure and gas in the direction of the side plate 113. This design can effectively control the spray direction of the gas, so that it sprays out from the side instead of directly spreading upward or downward, thereby reducing the risk of internal heat and pressure spreading to other battery cells 1420, thereby reducing the probability of further spread of thermal runaway.

[0081] Please continue to combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, the box body 11 includes a first side panel 1131 and a second side panel 1132 which are arranged opposite to each other along a second direction Y, the first side panel 1131 is provided with an air inlet 11311, and the second side panel 1132 is provided with an air outlet 11321.

[0082] The battery module 14 includes two battery cell modules 140 spaced apart along the second direction Y, a heat dissipation duct 144 is provided between two adjacent battery cell modules 140, and two ends of the heat dissipation duct 144 are respectively provided corresponding to the air inlet 11311 and the air outlet 11321; wherein, the battery box 1 body also includes an air cooling module 17, the air cooling module 17 is provided in the accommodating cavity 110, the air cooling module 17 is fixedly connected to the first side plate 1131, and the air cooling module 17 is provided at the air outlet 11321.

[0083] Specifically, the air cooling module 17 includes but is not limited to a fan 171, which introduces cold air into the battery box 1 to form an airflow to take away the heat from the surface of the battery module 14. The cold air enters through the air inlet 11311 and then flows to the air outlet 11321 through the heat dissipation duct 144 to form a cycle.

[0084] It can be understood that this embodiment can effectively guide the flow of cold air and optimize the heat dissipation process by setting the heat dissipation duct 144 between adjacent battery cell assemblies 1401, thereby ensuring that the battery module 14 can quickly reduce the temperature when working under high load, thereby improving the heat dissipation efficiency of the battery.

[0085] In this embodiment, the liquid cooling module 13 can use coolant as the main cooling medium, and quickly take away the heat generated by the battery module 14 through double-sided liquid cooling (both the upper liquid cooling plate 132 and the lower liquid cooling plate 131 are equipped with liquid cooling plates), thereby effectively reducing the battery temperature; at the same time, a heat dissipation duct 144 is arranged between adjacent battery cell assemblies 1401, and cold air is introduced into the battery box 1 through the fan 171 to further improve the heat dissipation efficiency. By cooperating with the air cooling module 17 and the liquid cooling module 13, an efficient thermal management system is formed, which effectively solves the problems of uneven temperature and insufficient heat dissipation caused by the use of a single liquid cooling plate in the related technology.

[0086] Please combine Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 and Fig.11 ;in, Fig.11 A schematic diagram of the explosion structure of a battery module provided in an embodiment of the present application.

[0087] In one embodiment, the battery module 14 includes a first battery cell module 140A and a second battery cell module 140B, the first battery cell module 140A includes a first battery cell assembly 14011 and the first battery cell bracket 14021, the second battery cell module 140B includes a second battery cell assembly 14012 and a second battery cell bracket 14022, the first battery cell bracket 14021 is arranged between the first battery cell assembly 14011 and the lower liquid cooling plate 131, and the second battery cell bracket 14022 is arranged between the second battery cell assembly 14012 and the lower liquid cooling plate 131; the first battery cell assembly 14011 and the second battery cell assembly 14012 can be fixedly connected by a connecting end plate 145.

[0088] It can be understood that by fixing each of the battery cell assemblies 1401 (the first battery cell assembly 14011 and the second battery cell assembly 14012) to the lower liquid cooling plate 131 through the corresponding battery cell bracket 1402 (the first battery cell bracket 14021 and the second battery cell bracket 14022), each of the battery cell assemblies 1401 is provided with independent support and fixing functions, thereby preventing the first battery cell assembly 14011 and the second battery cell assembly 14012 from vibrating and moving during transportation or operation.

[0089] Furthermore, the first battery cell bracket 14021 includes a first support portion 14311 and a second support portion 14312 arranged relatively to each other along a second direction Y, and a first connecting portion 14313 connecting the first supporting portion 14311 and the second supporting portion 14312, and the two ends of the first battery cell assembly 14011 are respectively fixedly connected to the first supporting portion 14311 and the second supporting portion 14312, and the first connecting portion 14313 is arranged on a side of the first battery cell assembly 14011 close to the second battery cell assembly 14012, and in the first battery cell assembly 14011, the pressure relief valve 14201 of the battery cell 1420 is arranged on a side of the first battery cell assembly 14011 away from the second battery cell assembly 14012.

[0090] The second battery cell bracket 14022 includes a third support portion 14321 and a fourth support portion 14322 arranged relatively to each other along the second direction Y, and a second connecting portion 14323 connecting the third support portion 14321 and the fourth support portion 14322. The two ends of the second battery cell assembly 14012 are respectively fixedly connected to the third support portion 14321 and the fourth support portion 14322. The second connecting portion 14323 is arranged on a side of the second battery cell assembly 14012 close to the first battery cell assembly 14011, and in the second battery cell assembly 14012, the pressure relief valve 14201 of the battery cell 1420 is arranged on a side of the second battery cell assembly 14012 away from the first battery cell assembly 14011.

[0091] It can be understood that in this embodiment, the two ends of the first battery cell assembly 14011 are respectively fixedly connected to the first support part 14311 and the second support part 14312, and the two ends of the second battery cell assembly 14012 are respectively fixedly connected to the third support part 14321 and the fourth support part 14322, so that the first battery cell assembly 14011 and the second battery cell assembly 14012 are stably supported in the box body 11, reducing damage to the battery cell assembly 1401 caused by vibration and external force, thereby improving the strength and durability of the battery box 1 structure.

[0092] At the same time, by setting the first connecting part 14313 on the side of the first battery cell assembly 14011 close to the second battery cell assembly 14012, and setting the second connecting part 14323 on the side of the second battery cell assembly 14012 close to the first battery cell assembly 14011, it not only helps to improve the structural strength between the first battery cell assembly 14011 and the second battery cell assembly 14012, and avoid mutual interference between the first battery cell assembly 14011 and the second battery cell assembly 14012, but also can control the heat transfer path between the first battery cell assembly 14011 and the second battery cell assembly 14012, to ensure that each battery cell assembly 1401 operates independently and effectively.

[0093] Please continue to combine Figure 2 , Figure 3 , Figure 4 , Figure 5 , Fig.10 and Fig.11In one embodiment, a first sub-guide rail 13111 and a second sub-guide rail 13112 are provided on a side of the lower liquid cooling plate 131 close to the battery module 14, a first sub-slot 1411 is provided on a side of the first support portion 14311 close to the lower liquid cooling plate 131, a second sub-slot 1412 is provided on a side of the second support portion 14312 close to the lower liquid cooling plate 131, a third sub-slot 1413 is provided on a side of the third support portion 14321 close to the lower liquid cooling plate 131, and a fourth sub-slot 1414 is provided on a side of the fourth support portion 14322 close to the lower liquid cooling plate 131; wherein, the first sub-slot 1411 and the third sub-slot 1413 are both sleeved on the first sub-guide rail 13111, and the second sub-slot 1412 and the fourth sub-slot 1414 are both sleeved on the second sub-guide rail 13112.

[0094] It can be understood that, in this embodiment, the first sub-slot 1411 and the third sub-slot 1413 are both sleeved on the first sub-guide rail 13111, and the second sub-slot 1412 and the fourth sub-slot 1414 are both sleeved on the second sub-guide rail 13112, so that the first battery cell assembly 14011 and the second battery cell assembly 14012 can simultaneously slide smoothly into or out of the predetermined position in the battery holder 12 along the first direction X, forming a convenient "drawer-type" structure, so that when the battery module 14 is installed or disassembled, there is no need to disassemble the battery holder 12 structure, which simplifies the assembly and disassembly operations of the battery module 14 and improves the convenience of maintaining and replacing the battery module 14.

[0095] Please continue to combine Figure 2 , Fig.11 and Fig.12 ;in, Fig.12 This is a schematic diagram of the structure of the heat insulation board provided in an embodiment of the present application.

[0096] In one embodiment, the battery box 1 further includes a heat insulation plate 18 , at least a portion of the heat insulation plate 18 is disposed between the first battery cell assembly 14011 and the second battery cell assembly 14012 , and the heat insulation plate 18 is in direct contact with both the first battery cell assembly 14011 and the second battery cell assembly 14012 .

[0097] It is understandable that during the operation of the battery module 14, different battery cell assemblies 1401 may cause local overheating due to uneven temperature. This embodiment prevents heat from being transferred to other battery cell assemblies 1401 when the temperature of one battery cell assembly 1401 is too high, thereby reducing chain reactions and improving the safety of the entire battery box 1.

[0098] Furthermore, a second slide groove 181 and a third slide groove 182 are provided on one side of the heat insulation plate 18 close to the lower liquid cooling plate 131, the second slide groove 181 is sleeved on the first sub-guide rail 13111, and the third slide groove 182 is sleeved on the second sub-guide rail 13112; wherein, the first sub-slide groove 1411, the third sub-slide groove 1413 and the second slide groove 181 are interconnected, and the second sub-slide groove 1412, the fourth sub-slide groove 1414 and the third slide groove 182 are interconnected.

[0099] Specifically, the lower liquid cooling plate 131 is provided with a first liquid cooling sub-section 13131 and a second liquid cooling sub-section 13132 on the first main body 1312, the first liquid cooling sub-section 13131 is provided corresponding to and in contact with the first battery cell assembly 14011, and the second liquid cooling sub-section 13132 is provided corresponding to and in contact with the second battery cell assembly 14012, so that the lower liquid cooling plate 131 can provide cooling function for different battery cell assemblies 1401, ensuring that heat can be quickly and effectively dissipated from the battery cell to prevent the battery module 14 from overheating.

[0100] There is a gap between the first liquid-cooling sub-section 13131 and the second liquid-cooling sub-section 13132, and at least part of the insulation plate 18 is arranged in the gap, thereby ensuring the physical isolation between the insulation plate 18, the first liquid-cooling sub-section 13131 and the second liquid-cooling sub-section 13132, which helps to better control the heat flow; further, at least part of the first connecting part 14313 and at least part of the second connecting part 14323 are arranged in the gap, thereby making the structure of the battery module 14 more compact and improving space utilization.

[0101] It can be understood that by sleeveing ​​the second slide groove 181 on the first sub-slide groove 1411 and the third slide groove 182 on the second sub-slide groove 1412, a stable structure can be formed between the insulation plate 18 and the lower liquid cooling plate 131 to prevent the insulation plate 18 from being displaced or falling off due to vibration during transportation or operation.

[0102] At the same time, by setting the first sub-slot 1411, the third sub-slot 1413 and the second slot 181 to be connected to each other, and the second sub-slot 1412, the fourth sub-slot 1414 and the third slot 182 to be connected to each other, the first battery cell module 140, the insulation plate 18 and the second battery cell module 140 can slide synchronously on the lower liquid cooling plate 131. When any one of the components (the first battery cell module 140, the insulation plate 18 and the second battery cell module 140) is pushed or pulled, the other components will also move accordingly, thereby realizing the rapid installation of the insulation plate 18 and the battery cell assembly 1401 and reducing the assembly time.

[0103] This embodiment provides an electrical device, which includes the battery box described in any of the above embodiments.

[0104] It can be understood that the battery box has been described in detail in the above embodiments and will not be repeated here.

[0105] The battery box includes a battery module, and the battery module is used as a power supply for electrical equipment. Therefore, the electrical equipment also has the advantages of the above-mentioned battery module, which helps to simplify the overall structure of the electrical equipment; wherein, the electrical equipment can be a car, an aircraft, a mechanical production equipment, etc.

[0106] 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: A box body, provided with a containing cavity; A battery holder is arranged in the accommodating cavity, the battery holder comprises a first top plate and a first bottom plate which are arranged opposite to each other, and a plurality of support frames connecting the first top plate and the first bottom plate, the first bottom plate is fixedly connected to the bottom of the box body, and the plurality of support frames are arranged around the edge of the first bottom plate; A battery module is arranged on a side of the first bottom plate close to the first top plate; A liquid cooling module, comprising a lower liquid cooling plate disposed between the first bottom plate and the battery module, and the lower liquid cooling plate is fixedly connected to the first bottom plate; Wherein, the battery module is slidably connected to the lower liquid cooling plate.

2. The battery box according to claim 1, characterized in that: A first guide rail is provided on one side of the lower liquid cooling plate close to the battery module, and a first slide groove is provided on one side of the battery module close to the lower liquid cooling plate. The first guide rail is embedded in the corresponding first slide groove; wherein the first slide groove is slidably connected to the first guide rail.

3. The battery box according to claim 2, characterized in that: The battery module includes at least one battery cell module, the battery cell module includes a battery cell assembly and a battery cell bracket, the battery cell bracket is arranged between the battery cell assembly and the lower liquid cooling plate, and the battery cell bracket is arranged around at least a part of the side wall of the battery cell assembly; Wherein, the battery cell support is fixedly connected to the battery cell assembly, and the first slide groove is arranged on a side of the battery cell support close to the lower liquid cooling plate.

4. The battery box according to claim 3, characterized in that: The lower liquid cooling plate comprises a first main body and a first liquid cooling part, the first liquid cooling part is arranged on a side of the first main body close to the battery cell assembly, the first guide rail is arranged on the first main body, and the first guide rail is located on a side of the first liquid cooling part close to an edge of the lower liquid cooling plate; The battery cell support comprises a support portion, the support portion is spaced apart from the first liquid cooling portion, a first slide groove is provided on a side of the support portion close to the lower liquid cooling plate, and the first slide groove penetrates the support portion along a first direction; The distance from the side of the first liquid cooling part away from the first main body to the first main body is equal to the distance from the side of the support part away from the first main body to the first main body, and the first liquid cooling part corresponds to and contacts the battery cell assembly.

5. The battery box according to any one of claims 1 to 4, characterized in that: The liquid cooling module further includes an upper liquid cooling plate, which is arranged between the first top plate and the battery module, and includes a second main body, a second liquid cooling part arranged on a side of the second main body close to the battery module, and a first positioning part and a second positioning part located on both sides of the second liquid cooling part, wherein the first positioning part, the second liquid cooling part and the second positioning part are arranged in sequence along the second direction; Among them, the battery holder includes a first fixing part and a second fixing part arranged relatively along the second direction, the first fixing part abuts against at least part of the first positioning part, the second fixing part abuts against at least part of the second positioning part, and the second liquid cooling part corresponds to and contacts the battery cell assembly.

6. The battery box according to claim 5, characterized in that: The first fixing portion includes a first clamping portion and a first limiting portion, the first limiting portion is located at one side of the upper liquid cooling plate, the first clamping portion extends from the first limiting portion toward the direction close to the first positioning portion, and a side of the first limiting portion close to the upper liquid cooling plate abuts against a side of the upper liquid cooling plate close to the first limiting portion, and a side of the first clamping portion close to the first positioning portion abuts against a side of the first positioning portion close to the first clamping portion; The second fixing portion includes a second clamping portion and a second limiting portion, the second limiting portion is located at the other side of the upper liquid cooling plate, the second clamping portion extends from the second limiting portion toward the direction close to the second positioning portion, and a side of the second limiting portion close to the upper liquid cooling plate abuts against a side of the upper liquid cooling plate close to the second limiting portion, and a side of the second clamping portion close to the first positioning portion abuts against a side of the first positioning portion close to the second clamping portion.

7. The battery box according to claim 6, characterized in that: The battery holder includes a third fixing portion and a fourth fixing portion which are arranged opposite to each other along a second direction, and the third fixing portion and the fourth fixing portion are both fixedly connected to the first bottom plate; wherein two ends of the battery module correspond to and abut against the first fixing portion and the second fixing portion respectively.

8. The battery box according to any one of claims 1 to 4, characterized in that: The battery bracket comprises a first baffle frame and a second baffle frame which are arranged opposite to each other along a first direction, wherein the first baffle frame is located between two adjacent support frames, and the second baffle frame is located between two adjacent support frames; Wherein, when the first baffle frame and / or the second baffle frame are opened, the first baffle frame and / or the second baffle frame are rotatably connected to the first base plate; when the first baffle frame and / or the second baffle frame are closed, the first baffle frame and / or the second baffle frame are fixedly connected to the support frame.

9. The battery box according to claim 8, characterized in that: The first baffle frame includes a first baffle plate, which is rotatably connected to the lower liquid cooling plate; the second baffle frame includes a second baffle plate, which is rotatably connected to the lower liquid cooling plate; The thickness of the first baffle plate is smaller than the thickness of the liquid cooling plate, and the thickness of the second baffle plate is smaller than the thickness of the liquid cooling plate.

10. The battery box according to any one of claims 1 to 4, characterized in that: The box body comprises a second bottom plate and a side plate connected to each other, the side plate and the second bottom plate are detachably connected, and the second bottom plate and the side plate enclose the accommodating cavity; The battery module includes a battery cell module, the battery cell module includes a battery cell assembly, and the battery cell assembly includes a plurality of battery cells arranged at intervals along the second direction; wherein the battery cell includes a pressure relief valve, and the pressure relief valve is arranged on a side of the battery cell close to the side plate.

11. The battery box according to claim 10, characterized in that: The battery module comprises a first battery cell assembly, a second battery cell assembly, a first battery cell bracket and a second battery cell bracket, wherein the first battery cell bracket is arranged between the first battery cell assembly and the lower liquid cooling plate, and the second battery cell bracket is arranged between the second battery cell assembly and the lower liquid cooling plate; Wherein, the first battery cell bracket includes a first supporting portion and a second supporting portion arranged opposite to each other along the second direction, and a first connecting portion connecting the first supporting portion and the second supporting portion, two ends of the first battery cell assembly are respectively fixedly connected to the first supporting portion and the second supporting portion, the first connecting portion is arranged on a side of the first battery cell assembly close to the second battery cell assembly, and in the first battery cell assembly, the pressure relief valve of the battery cell is arranged on a side of the first battery cell assembly away from the second battery cell assembly; The second battery cell bracket includes a third support portion and a fourth support portion arranged relatively to each other along a second direction, and a second connecting portion connecting the third support portion and the fourth support portion, the two ends of the second battery cell assembly are respectively fixedly connected to the third support portion and the fourth support portion, the second connecting portion is arranged on a side of the second battery cell assembly close to the first battery cell assembly, and in the second battery cell assembly, the pressure relief valve of the battery cell is arranged on a side of the second battery cell assembly away from the first battery cell assembly.

12. The battery box according to claim 11, characterized in that: The battery box further includes a heat insulation plate, at least a portion of which is disposed between the first battery cell assembly and the second battery cell assembly, and the heat insulation plate is in direct contact with both the first battery cell assembly and the second battery cell assembly.

13. The battery box according to claim 12, characterized in that: A second chute and a third chute are provided on one side of the heat insulation plate close to the lower liquid cooling plate; A first sub-rail and a second sub-rail are provided on one side of the lower liquid cooling plate close to the battery module; Wherein, the second sliding groove is sleeved on the first sub-guide rail, and the third sliding groove is sleeved on the second sub-guide rail.

14. The battery box according to any one of claims 1 to 4, characterized in that: The box body comprises a second bottom plate and a second top plate which are arranged opposite to each other, and the battery holder is arranged between the second bottom plate and the second top plate; The battery box also includes a support module, which is arranged between the battery bracket and the second bottom plate. The support module includes a plurality of support sub-components, and the plurality of support sub-components are arranged around the edge of the second bottom plate. One side of the support sub-component is fixedly connected to the first bottom plate, and the other side of the support sub-component is fixedly connected to the second bottom plate.

15. An electrical equipment, characterized in that: Comprising a battery box as claimed in any one of claims 1 to 14.

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