Battery box body and battery device

Abstract

The utility model discloses a battery box and a battery device, and belongs to the field of batteries. The battery box comprises a tray and a bearing boss, the bearing boss is used for bearing the battery and arranged on the side face, facing the containing cavity, of the tray, and a pressure relief channel and a pressure relief hole communicated with the pressure relief channel and used for corresponding to a first valve body of the battery are formed in the bearing boss. The bearing bosses of the battery box body have the effects of bearing the battery and preventing heat diffusion, on one hand, high-temperature jetted objects jetted due to abnormal pressure of the battery monomers can be directly discharged into the pressure relief channel, and the risk that the high-temperature jetted objects are gathered on the side surfaces of the battery monomers can be reduced; therefore, the risk of damaging the pole of the battery by the high-temperature sprayed object can be reduced, and the reliability of the battery device is improved; on the other hand, the bearing boss can integrate the battery supporting function and the pressure relief protection function, the diversity of the functions of the bearing boss is improved, and the function integration degree of the battery box body is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery box and a battery device. BACKGROUND

[0002] With the rapid development of electric vehicles and energy storage systems, the safety and integration level of batteries have become a development trend. In the related art, a battery device includes a battery box and a battery accommodated in the battery box, and the battery device has the following problems: firstly, the functions of various components in the battery box are relatively single, and the component functions are wasted; secondly, when the battery is in thermal runaway, high-temperature spatter of the battery can damage the pole column and the distribution box and other PACK components, and the battery device needs to be improved. CONTENT OF THE UTILITY MODEL

[0003] The application aims to at least solve one of the technical problems in the prior art. To this end, the application provides a battery box and a battery device, and a bearing boss of the battery box plays a role of bearing the battery and preventing heat diffusion.

[0004] In a first aspect, the application provides a battery box, which forms a containing cavity for accommodating a battery, and the battery box comprises:

[0005] a tray;

[0006] a bearing boss for bearing the battery, the bearing boss being arranged on a side of the tray facing the containing cavity, the bearing boss being formed with a pressure relief channel and a pressure relief hole in communication with the pressure relief channel and corresponding to a first valve body of the battery.

[0007] According to the battery box of the application, the pressure relief channel and the pressure relief hole are arranged on the bearing boss for bearing the battery, on the one hand, high-temperature spatter abnormally sprayed by the battery monomer can be directly discharged into the pressure relief channel, which can reduce the risk of accumulation of high-temperature spatter on the side of the battery monomer, thereby reducing the risk of damage of high-temperature spatter to the pole column of the battery and improving the reliability of the battery device; on the other hand, the bearing boss can integrate the functions of supporting the battery and pressure relief protection, thereby improving the diversity of the function of the bearing boss and improving the functional integration level of the battery box.

[0008] According to an embodiment of the application, the bearing boss comprises:

[0009] a bearing part forming the pressure relief channel and the pressure relief hole, the bearing part being used for bearing the battery;

[0010] a connecting part arranged on a side of the bearing part away from the battery in the height direction and protruding from the bearing part in the first direction, the connecting part being connected with the tray.

[0011] According to an embodiment of the present application, the bearing part is open on a side facing away from the battery, and the bearing part and the tray jointly form the pressure relief channel.

[0012] According to an embodiment of the present application, the bearing boss comprises a plurality of pressure relief holes arranged in a spaced manner, and the plurality of pressure relief holes are in one-to-one correspondence with the plurality of first valve bodies of the battery.

[0013] According to an embodiment of the present application, the bearing boss comprises a plurality of bearing bosses arranged in a spaced manner along a first direction, and the pressure relief holes of adjacent two bearing bosses are arranged in a staggered manner along the first direction.

[0014] According to an embodiment of the present application, the battery box further comprises a reinforcing member, and the reinforcing member is connected to the tray and the bearing boss, respectively; and / or,

[0015] The battery box further comprises an expansion beam arranged on a side of the tray facing the accommodating cavity, and the expansion beam and the bearing boss are arranged alternately, and the end of the bearing boss protrudes from the expansion beam along a second direction.

[0016] In a second aspect, the present application provides a battery device, comprising:

[0017] The battery box as claimed in any one of the preceding claims;

[0018] A second valve body is mounted to the battery box, and the pressure relief channel of the battery box is arranged in correspondence with the second valve body;

[0019] A battery comprises a plurality of battery monomers, and the plurality of first valve bodies of the plurality of battery monomers are arranged in one-to-one correspondence with the plurality of pressure relief holes of the battery box.

[0020] According to an embodiment of the present application, the first valve body and the pole are arranged on different sides of the battery monomer, and the first valve body is located on a side of the battery monomer facing the tray of the battery box.

[0021] According to an embodiment of the present application, the plurality of battery monomers are arranged in a stacked manner along a second direction, and the first valve body of each battery monomer is arranged on a side close to the negative pole of the battery monomer.

[0022] According to an embodiment of the present application, the second valve body is connected to the plurality of pressure relief channels of the battery box.

[0023] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0025] Figure 1 is one of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0026] Figure 2 is another of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0027] Figure 3 is a third of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0028] Figure 4 is a fourth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0029] Figure 5 is a fifth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0030] Figure 6 is a sixth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0031] Figure 7 is a seventh of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0032] Figure 8 is an eighth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0033] Figure 9 is a ninth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0034] Figure 10 is a tenth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0035] Figure 11 is an eleventh of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0036] Figure 12 is a twelfth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0037] Figure 13 is a thirteenth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0038] Figure 14 is a fourteenth of structural schematic diagrams of a battery device provided by embodiments of the present application;

[0039] Figure 15 is a fifteenth of structural schematic diagrams of a battery device provided by embodiments of the present application.

[0040] Reference Signs:

[0041] Battery box 1, tray 11, bearing boss 12, bearing part 121, pressure relief channel 1211, pressure relief hole 1212, connecting part 122, reinforcing part 13, expansion beam 14, foaming layer 15, bottom guard plate 16, reinforcing part 17;

[0042] Battery 2, battery cell 21, first valve body 22, pole 23;

[0043] Second valve body 3. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0045] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0046] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc., which is not limited in the embodiments of the present application.

[0047] The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, which is not limited in the embodiments of the present application. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, which is not limited in the embodiments of the present application.

[0048] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc., for example, spacecraft including airplanes, rockets, space shuttles and spaceships, etc. The battery cell is used for storing or providing electric energy.

[0049] The battery device (Battery Apparatus) mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0050] The following refers to Figures 1-15A battery box 1 and a battery device according to embodiments of the present application are described.

[0051] As shown in Figure 1 , Figure 2 and Figure 8 , the battery device comprises the battery box 1, the second valve body 3, and the battery 2 accommodated into the accommodating cavity of the battery box 1, the tray 11 is provided with a mounting position of the second valve body 3 of the battery box 1, and the second valve body 3 provides exhaust and pressure relief functions.

[0052] As shown in Figure 3 , Figure 4 and Figure 5 , the battery box 1 according to embodiments of the present application forms an accommodating cavity for accommodating the battery 2, and the battery box 1 comprises the tray 11 and the bearing boss 12.

[0053] The tray 11 can be a partial box of the battery box 1, for example, a lower box or an upper box of the battery box 1.

[0054] Exemplarily, the bearing boss 12 can be a plate-like or strip-like structure.

[0055] The bearing boss 12 is arranged on a side of the tray 11 facing the accommodating cavity, the battery 2 is placed on the bearing boss 12 of the tray 11, and the bearing boss 12 is used for bearing the battery 2.

[0056] In the embodiment, the bearing boss 12 plays a role of bearing the battery 2 and preventing heat diffusion.

[0057] As shown in Figure 6 , Figure 7 and Figure 14 , the bearing boss 12 is formed with a pressure relief passage 1211 and a pressure relief hole 1212 in communication with the pressure relief passage 1211 and used for corresponding to the first valve body 22 of the battery 2.

[0058] The first valve body 22 can be an explosion-proof valve.

[0059] Exemplarily, the pressure relief hole 1212 can be a connecting hole integrally formed on the bearing boss 12 according to the size of the first valve body 22, and the first valve body 22 is nested with the pressure relief hole 1212.

[0060] The pressure relief passage 1211 is connected with the second valve body 3 of the battery device in correspondence, that is, the pressure relief passage 1211 is connected with the external environment of the battery box 1 through the second valve body 3. When the internal pressure of the battery box 1 or the pressure relief passage 1211 abnormally rises, the second valve body 3 is opened, and the high-temperature spray in the battery box 1 or the pressure relief passage 1211 is discharged out of the battery box 1 through the second valve body 3.

[0061] The second valve body 3 can be an explosion-proof valve or a breather valve.

[0062] The pressure relief channel 1211 can be connected to the inside of the battery box 1 or connected to the second valve body 3.

[0063] The battery 2 may include multiple battery cells 21, and each battery cell 21 is provided with a first valve body 22.

[0064] The pressure relief holes 1212 can include multiple holes, which are arranged on the support boss 12 along the arrangement direction of the multiple battery cells 21. The multiple pressure relief holes 1212 are arranged one-to-one with the multiple first valve bodies 22 of the multiple battery cells 21. When the internal pressure of the battery cell 21 rises abnormally, the first valve body 22 opens, and the high-temperature ejected material in any battery cell 21 can be discharged into the pressure relief channel 1211 through the corresponding pressure relief hole 1212 and discharged from the battery box 1 through the pressure relief channel 1211. This avoids the accumulation of high-temperature ejected material on the side of the battery cell 21, thereby reducing the risk of damage to the terminal post 23 of the battery 2 by the high-temperature ejected material.

[0065] Among them, such as Figure 2 and Figure 11 As shown, the number of support bosses 12 can be set to one or more. Multiple support bosses 12 are arranged at intervals along the first direction to provide multi-point support and fixation for the battery 2, thereby improving the stability of the connection between the battery 2 and the battery housing 1.

[0066] The supporting boss 12 and the side of the tray 11 facing the receiving cavity can be connected by welding, gluing, zip-locking or threaded connection.

[0067] In related technologies, the first valve body 22 of the battery cell 21 and the terminal post 23 of the battery cell 21 are usually located on the same end face of the battery cell 21. When the internal pressure of the battery cell 21 rises abnormally, the high-temperature ejected material inside the battery cell 21 is ejected through the first valve body 22, and the high-temperature ejected material will be ejected to the side, causing damage to the terminal post 23 of the battery cell 21 and PACK components such as the distribution box. At the same time, the bearing boss 12 of the tray 11 only serves to support the battery 2, resulting in a waste of component function.

[0068] According to the battery housing 1 provided in the embodiments of this application, by providing a pressure relief channel 1211 and a pressure relief hole 1212 on the support boss 12 for supporting the battery 2, on the one hand, the high-temperature ejected material ejected by abnormal pressure of the battery cell 21 will be directly discharged into the pressure relief channel 1211, which can reduce the risk of high-temperature ejected material accumulating on the side of the battery cell 21, thereby reducing the risk of high-temperature ejected material damaging the terminal post 23 of the battery 2 and improving the reliability of the battery device; on the other hand, the support boss 12 can integrate the functions of supporting the battery 2 and pressure relief protection, which improves the diversity of functions of the support boss 12 and improves the functional integration of the battery housing 1.

[0069] In some embodiments, as shown in Figure 11 The bearing boss 12 includes a plurality of pressure relief holes 1212 arranged at intervals, which are in one-to-one correspondence with the plurality of first valve bodies 22 of the plurality of battery monomers 21 of the battery 2.

[0070] In this embodiment, each battery monomer 21 has a corresponding pressure relief hole 1212, and when any battery monomer 21 experiences thermal runaway, the high-temperature spray will reach the pressure relief channel 1211, which can reduce the risk of direct contact between the high-temperature spray and any side of the battery 2, thereby reducing the risk of damage to the pole 23 of the battery 2 by the high-temperature spray and improving the reliability of the battery device.

[0071] The shape and size of the pressure relief hole 1212 are adapted to the outlet of the first valve body 22.

[0072] The outlet of the first valve body 22 is in sealed connection with the pressure relief hole 1212 to increase the sealing between the outlet of the first valve body 22 and the pressure relief hole 1212, thereby reducing the risk of leakage of high-temperature spray from the connection between the first valve body 22 and the pressure relief hole 1212.

[0073] For example, the outlet of the first valve body 22 and the pressure relief hole 1212 can be sealed by a sealing member, which can be a sealing ring or a sealing strip; the outlet of the first valve body 22 and the pressure relief hole 1212 can also be sealed by mechanical sealing.

[0074] In some embodiments, as shown in Figure 11 The bearing boss 12 includes a plurality of pressure relief holes 1212 arranged at intervals, which are in one-to-one correspondence with the plurality of first valve bodies 22 of the plurality of battery monomers 21 of the battery 2.

[0075] In this embodiment, each bearing boss 12 corresponds to the first valve body 22 of a part of the battery monomers 21, and the plurality of bearing bosses 12 collectively bear the pressure-resistant structure, thereby reducing the number of pressure relief holes 1212 on each bearing boss 12, increasing the structural strength of each bearing boss 12, reducing the pressure-resistant strength requirement of each bearing boss 12, reducing the material cost of the bearing boss 12, and improving the reliability.

[0076] For example, the bearing boss 12 includes two bearing bosses 12 arranged at intervals on both sides of the tray 11 along the first direction, the two bearing bosses 12 support the battery 2 at two places near the end along the first direction, and the pressure relief holes 1212 of the two bearing bosses 12 are arranged at intervals along the first direction. The first valve bodies 22 of the adjacent two battery monomers 21 are arranged at intervals along the arrangement direction.

[0077] That is, each bearing boss 12 corresponds to the first valve body 22 of half of the plurality of battery monomers 21.

[0078] In some embodiments, as shown in Figure 10 The bearing boss 12 includes a bearing part 121 and a connecting part 122, which can be integrally connected or welded.

[0079] The bearing part 121 forms a pressure relief channel 1211 and a pressure relief hole 1212, and is used to bear the battery 2.

[0080] The bearing part 121 is supported between the battery 2 and the tray 11.

[0081] The connecting part 122 is disposed on the side of the bearing part 121 away from the battery 2 along the height direction and protrudes from the bearing part 121 along the first direction, and is connected with the tray 11 to increase the stability of the connection between the bearing boss and the tray 11.

[0082] The connecting part 122 is disposed on at least one side of the bearing part 121 along the first direction, for example, on one side or both sides of the bearing part 121 along the first direction.

[0083] In other words, the distance from the top surface of the bearing part 121 to the battery monomer 21 is less than the distance from the top surface of the connecting part 122 to the battery monomer 21.

[0084] In this embodiment, the bearing boss 12 has a "J" shape structure, and the bearing part 121 protrudes from the connecting part 122 in the direction towards the battery 2 to facilitate the formation of the pressure relief channel 1211, and at the same time facilitates the support and fixation of the battery 2.

[0085] The pressure relief channel 1211 can have at least two structures as follows:

[0086] One of them, as shown in Figure 11 The bearing boss 12 and the tray 11 jointly form the pressure relief channel 1211.

[0087] In this structure, the side of the bearing part 121 away from the battery 2 is open, and the bearing part 121 and the tray 11 jointly form the pressure relief channel 1211.

[0088] In this embodiment, the machining difficulty of the bearing boss 12 can be reduced, and a stamping method can be used; at the same time, the thickness of the bearing boss 12 along the height direction can be reduced, the effective space of the battery box 1 occupied by the bearing boss 12 can be reduced, and the energy density of the battery device can be improved.

[0089] Secondly, the pressure relief channel 1211 is formed inside the bearing boss 12.

[0090] In the structure, the bearing part 121 is a hollow structure, an internal part of the bearing part 121 forms a pressure relief channel 1211, the pressure relief channel 1211 has good air tightness, which can reduce the risk of high-temperature spray leaking from the pressure relief channel 1211, thereby reducing the risk of high-temperature spray damaging the pole 23 of the battery 2, and improving the reliability of the battery device.

[0091] In some embodiments, as shown in Figure 14 and Figure 15 , the battery box 1 further comprises a reinforcing member 13, and the reinforcing member 13 is connected to the tray 11 and the bearing boss 12 respectively.

[0092] Among them, the reinforcing member 13 can be arranged in the accommodating cavity, and the reinforcing member 13 can include a plurality of reinforcing members 13, which are distributed along the extension direction of the bearing boss 12, so as to enhance the stability of the connection between the tray 11 and the bearing boss 12, and enhance the strength of the bearing boss 12.

[0093] Among them, the tray 11 includes a bottom plate and a flange folded upward along a first direction from an edge of the bottom plate, and the bearing boss 12 is arranged on a side of the bottom plate facing the battery monomer 21, the connecting part 122 of the bearing boss 12 is welded to the bottom plate, and the bearing part 121 of the bearing boss 12 is connected to the flange through the reinforcing member 13, thereby increasing the stability of the connection between the tray 11 and the bearing boss 12.

[0094] In some embodiments, as shown in Figure 4 and Figure 5 , the battery box 1 further comprises a reinforcing member 13, and the reinforcing member 13 is connected to the tray 11 and the bearing boss 12 respectively.

[0095] The reinforcing member 17 can be annular, and the reinforcing member 17 extends around the circumference of the tray, and the bottom guard plate 16 can be installed on the tray 11 through the reinforcing member 17.

[0096] In some embodiments, as shown in Figure 5 and Figure 8 , the battery box 1 further comprises an expansion beam 14, and the expansion beam 14 is arranged on a side of the tray 11 facing the accommodating cavity, and the expansion beam 14 and the bearing boss 12 are arranged alternately, and the end of the bearing boss 12 protrudes from the expansion beam 14 along a second direction.

[0097] The expansion beam 14 is located on both sides of the tray 11 along the second direction, and the expansion beam 14 and the bearing boss 12 are arranged alternately to form a frame of the battery box 1.

[0098] Among them, the second direction is perpendicular to the first direction.

[0099] The expansion beam 14 can be fixed to the inner cavity bottom surface of the tray 11 by welding. The welding method can be laser welding with filler wire or arc welding, for example. The bottom surface of the expansion beam 14 is connected to the upper surface of the bearing boss 12 to reduce the influence of the expansion beam 14 on the pressure relief passage 1211.

[0100] In the embodiment, the expansion beam 14 divides the tray 11 into a containing cavity and an electrical cavity, and the end of the bearing boss 12 is located outside the containing cavity, i.e., the end of the pressure relief passage 1211 is located outside the containing cavity, thereby reducing the risk of high-temperature spray leakage into the containing cavity and increasing the reliability of the battery device.

[0101] In some embodiments, the tray 11 further comprises a foaming layer 15 arranged on the side of the tray 11 facing the containing cavity. The foaming layer 15 can serve to keep the battery 2 warm and absorb the impact energy of the bottom of the battery 2.

[0102] In some embodiments, the battery box 1 further comprises a bottom guard plate 16 arranged on the side of the tray 11 away from the containing cavity. The bottom guard plate 16 can be arranged on the bottom of the tray 11 to enhance the strength of the bottom of the tray 11, thereby enhancing the bottom ball performance of the battery device.

[0103] As shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, the present application provides a battery box 1 comprising a tray 11 and a bearing boss 12. Figure 5 and Figure 8 As shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14, the present application provides a battery box 1 comprising a tray 11 and a bearing boss 12.

[0104] The second valve body 3 is mounted to the battery box 1, and the pressure relief passage 1211 of the battery box 1 is arranged correspondingly to the second valve body 3. The pressure relief passage 1211 of the battery box 1 can be connected to the second valve body 3. For example, the pressure relief passage 1211 is in communication with the inlet of the second valve body 3, or the pressure relief passage 1211 and the second valve body 3 are both connected to the same space.

[0105] The pressure relief passage 1211 is connected to the second valve body 3 of the battery device, i.e., the pressure relief passage 1211 is in communication with the external environment of the battery box 1. When the internal pressure of the battery box 1 or the pressure relief passage 1211 abnormally rises, the second valve body 3 opens, and the high-temperature spray in the battery box 1 or the pressure relief passage 1211 is discharged out of the battery box 1 through the second valve body 3.

[0106] The battery 2 comprises a plurality of battery monomers 21, and a plurality of explosion-proof valves of the plurality of battery monomers 21 are arranged correspondingly to a plurality of pressure relief holes 1212 of the battery box 1.

[0107] When the internal pressure of the battery monomer 21 abnormally rises, the first valve body 22 opens, and the high-temperature spray in any battery monomer 21 can be discharged into the pressure relief channel 1211 through the corresponding pressure relief hole 1212, and then discharged from the battery box 1 through the pressure relief channel 1211, thereby avoiding the situation that the high-temperature spray is gathered on the side of the battery monomer 21, and reducing the risk of damage of the high-temperature spray to the pole 23 of the battery 2.

[0108] The mounting position of the second valve body 3 of the battery box 1 is arranged on the tray 11, which can be arranged on the bottom plate of the tray 11 or the turned-up edge of the tray 11.

[0109] For example, the mounting position of the second valve body 3 can be a through hole, and the second valve body 3 is inserted into the through hole and in sealing connection with the through hole.

[0110] According to the battery device provided in the embodiments of the present application, the pressure relief channel 1211 and the pressure relief hole 1212 are arranged on the bearing boss 12 for bearing the battery 2. On the one hand, the high-temperature spray abnormally sprayed from the battery monomer 21 can be directly discharged into the pressure relief channel 1211, which can reduce the risk of gathering of the high-temperature spray on the side of the battery monomer 21, thereby reducing the risk of damage of the high-temperature spray to the pole 23 of the battery 2 and improving the reliability of the battery device. On the other hand, the bearing boss 12 can integrate the functions of supporting the battery 2 and pressure relief protection, thereby improving the diversity of the functions of the bearing boss 12 and improving the degree of functional integration of the battery box 1.

[0111] In some embodiments, as shown in Figs. 1 and 2, the first valve body 22 and the pole 23 of the battery monomer 21 are arranged on different sides of the battery monomer 21, so as to correspondingly arrange the first valve body 22 and the pressure relief hole 1212 on the bearing boss 12, and reduce the interference with the arrangement position of the pole 23 and the electrical connection of the adjacent pole 23. Figure 12 Figure 13 In some embodiments, as shown in Figs. 1 and 2, the first valve body 22 and the pole 23 of the battery monomer 21 are arranged on different sides of the battery monomer 21, so as to correspondingly arrange the first valve body 22 and the pressure relief hole 1212 on the bearing boss 12, and reduce the interference with the arrangement position of the pole 23 and the electrical connection of the adjacent pole 23.

[0112] In some embodiments, as shown in Figs. 1 and 2, the first valve body 22 and the pole 23 of the battery monomer 21 are arranged on different sides of the battery monomer 21, so as to correspondingly arrange the first valve body 22 and the pressure relief hole 1212 on the bearing boss 12, and reduce the interference with the arrangement position of the pole 23 and the electrical connection of the adjacent pole 23.

[0113] In the embodiments, the first valve body 22 of the battery monomer 21 is arranged below, so as to correspond to the pressure relief hole 1212 of the bearing boss 12. The directional pressure relief channel 1211 formed by the bearing boss 12 can discharge the heat generated by the battery monomer 21 along the bearing boss 12 to the second valve body 3 or the breather valve, thereby discharging the heat outside the battery device.

[0114] The battery device provided in the present application reduces the functional damage of the distribution box and other components in the battery device, reduces the heat management energy consumption, increases the reliability of the battery device, and prolongs the service life of the battery device. ​

[0115] In some embodiments, as shown in Figure 13 The plurality of battery cells 21 are arranged in a stacked manner along the second direction, and the positive and negative poles of the plurality of battery cells 21 along the stacking direction are arranged alternately so as to be connected in series.

[0116] In the above embodiments, the first valve body 22 of each battery cell 21 is arranged on one side of the pole post 23 close to the negative pole end of the battery cell 21, or the first valve body 22 of each battery cell 21 is arranged on one side of the pole post 23 close to the positive pole end of the battery cell 21, thereby forming a structure in which the first valve bodies 22 of the plurality of battery cells 21 are arranged alternately, and the plurality of first valve bodies 22 on the same side of the battery device are connected to the pressure relief hole 1212 of the corresponding bearing boss 12.

[0117] It should be noted that in the case of large-scale leakage of the battery cell 21, the first valve body 22 of the battery cell 21 can be arranged on one side of the pole post 23 close to the negative pole end of the battery cell 21, or the first valve body 22 of each battery cell 21 can be arranged on one side of the pole post 23 close to the positive pole end of the battery cell 21, and both arrangements have no effect on the reliability of the battery cell 21, and both will cause the battery device to fail.

[0118] In some embodiments, the first valve body 22 of each battery cell 21 is arranged on one side of the pole post 23 close to the negative pole end of the battery cell 21.

[0119] It can be understood that since the negative voltage of the battery cell 21 is relatively low relative to the positive voltage, the danger is relatively small when there is slight leakage, and therefore arranging the first valve body 22 of the battery cell 21 on one side of the pole post 23 close to the negative pole end of the battery cell 21 can enhance the reliability of the battery cell 21 under slight leakage.

[0120] In the present embodiment, the first valve body 22 of a part of the battery cells 21 corresponds to one of the plurality of bearing bosses 12, and the first valve body 22 of another part of the battery cells 21 corresponds to another of the plurality of bearing bosses 12, the bearing boss 12 corresponds to the first valve body 22 of the part of the battery cells 21, and the plurality of bearing bosses 12 jointly bear the structure required by the pressure resistance, thereby reducing the number of pressure relief holes 1212 on each bearing boss 12, increasing the structural strength of each bearing boss 12, reducing the pressure resistance requirement of each bearing boss 12, reducing the material cost of the bearing boss 12, and improving the reliability.

[0121] In some embodiments, the second valve body 3 is connected to the plurality of pressure relief channels 1211 of the battery box 1.

[0122] Exemplarily, the plurality of pressure relief channels 1211 can be connected to the same cavity as the second valve body 3, so that the high-temperature jet in the pressure relief channel 1211 can be discharged through the second valve body 3, reducing the risk of explosion of the battery device and improving reliability.

[0123] Exemplarily, one end of the pressure relief channel 1211 can be connected to the second valve body 3, or both ends of the pressure relief channel 1211 can be connected to the second valve body 3.

[0124] The number of the second valve body 3 is determined according to the heat diffusion requirement of the project. When the project requires two, the second valve body 3 can be arranged at both ends of the pressure relief channel 1211, or one second valve body 3 can correspond to two pressure relief channels 1211.

[0125] When the project requires only one second valve body 3 at one end of the pressure relief channel 1211, the port of the bearing boss 12 on the side without the second valve body 3 needs to be sealed to guide the gas to the side of the pressure relief channel 1211 connected to the second valve body 3, reducing the risk of high-temperature jet gathering on the side of the battery monomer and improving the reliability of the battery device.

[0126] The size of the second valve body 3 is determined according to the size of the tray 11 and the exhaust volume.

[0127] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0128] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0129] In the description of the application, "first feature", "second feature" can include one or more of the features.

[0130] In the description of the application, "a plurality of" means two or more.

[0131] In the description of the application, "on" or "under" the first feature in the second feature can include the first and second features directly contact, or can include the first and second features are not directly contact but contact through another feature between them.

[0132] In the description of the application, the first feature "on", "above" and "over" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height.

[0133] In the description of the application, the description of the reference terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0134] Although the embodiments of the application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A battery housing, characterized in that, A receiving cavity is formed for housing the battery, the battery housing comprising: tray; A support boss is provided on the side of the tray facing the receiving cavity. The support boss has a pressure relief channel and a pressure relief hole that communicates with the pressure relief channel and corresponds to the first valve body of the battery.

2. The battery housing according to claim 1, characterized in that, The bearing boss includes: The support portion forms the pressure relief channel and the pressure relief hole, and the support portion is used to support the battery; A connecting portion is disposed along the height direction on the side of the support portion opposite to the battery and protrudes from the support portion along the first direction; the connecting portion is connected to the tray.

3. The battery housing according to claim 2, characterized in that, The support portion is open on the side opposite to the battery, and the support portion and the tray together form the pressure relief channel.

4. The battery housing according to claim 1, characterized in that, The bearing boss includes a plurality of pressure relief holes spaced apart, and the plurality of pressure relief holes are connected to a plurality of first valve bodies of the battery in a one-to-one correspondence.

5. The battery housing according to claim 4, characterized in that, The bearing protrusions include multiple protrusions, which are spaced apart along a first direction, and the pressure relief holes of two adjacent bearing protrusions are staggered along the first direction.

6. The battery housing according to any one of claims 1-5, characterized in that, The battery housing also includes reinforcing members, which are connected to the tray and the supporting boss respectively; and / or The battery housing also includes an expansion beam, which is disposed on the side of the tray facing the receiving cavity, and the expansion beam is alternately disposed with the bearing boss, the end of the bearing boss protruding from the expansion beam in a second direction.

7. A battery device, characterized in that, include: Battery housing as described in any one of claims 1-6; The second valve body is installed in the battery box, and the pressure relief channel of the battery box is correspondingly provided with the second valve body; The battery includes multiple battery cells, and the multiple first valve bodies of the multiple battery cells are arranged one-to-one with the multiple pressure relief holes of the battery housing.

8. The battery device according to claim 7, characterized in that, The first valve body and the terminal post are disposed on different sides of the battery cell, and the first valve body is located on the side of the battery cell facing the tray of the battery case.

9. The battery device according to claim 8, characterized in that, The plurality of battery cells are stacked and arranged along the second direction, and the first valve body of each battery cell is disposed on the side close to the negative electrode post of the battery cell.

10. The battery device according to claim 7, characterized in that, The second valve body is connected to multiple pressure relief channels of the battery box.

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