Box body of battery pack, battery pack, battery device and electric equipment

Abstract

The utility model discloses a box body of battery pack, battery pack, battery device and electric equipment, the box body of battery pack comprises: a box body and a cover plate, the box body is internally provided with an accommodation cavity, the side wall of the box body is provided with an exhaust groove, the exhaust groove is provided with an opening deviating from the accommodation cavity; the cover plate is arranged on the box body to seal the opening so as to define an exhaust cavity, and the box body is provided with an exhaust port used for communicating the containing cavity with the exhaust cavity. Therefore, the exhaust cavity is defined by the box body and the cover plate together, so that the forming difficulty of the exhaust cavity can be reduced, the cross section size of the exhaust cavity can be large, the exhaust efficiency of the exhaust cavity is improved, and the safety of the battery pack is ensured.

Description

Technical Field

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

[0002] In the related art, the exhaust channel of the battery box is usually die-cast as a whole. Due to the limitation of the process, the size of the exhaust channel is usually small, and the exhaust is not smooth, which affects the safety of the battery pack. There is room for improvement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery pack housing having a large exhaust cavity cross-section and high exhaust efficiency, thereby better ensuring the safety of the battery pack.

[0004] According to an embodiment of the present invention, the box body of the battery pack includes: a box body, a accommodating cavity is provided in the box body, and a side wall of the box body is provided with an exhaust groove, and the exhaust groove has an opening away from the accommodating cavity; a cover plate, the cover plate is provided on the box body to cover the opening to define the exhaust cavity, and the box body is provided with an exhaust port for connecting the accommodating cavity and the exhaust cavity.

[0005] According to the box body of the battery pack of the embodiment of the present invention, the exhaust cavity is defined by the box body and the cover plate, which can reduce the difficulty of forming the exhaust cavity, so that the cross-sectional size of the exhaust cavity can be constructed to be larger, thereby improving the exhaust efficiency of the exhaust cavity and ensuring the safety of the battery pack.

[0006] According to some embodiments of the present invention, the box of the battery pack further includes a reinforcing rib, which is arranged in the exhaust cavity and has two ends connected to opposite inner walls of the exhaust cavity.

[0007] According to the battery pack box of some embodiments of the present invention, the number of the reinforcing ribs is multiple and they are spaced apart along the length direction of the exhaust cavity.

[0008] According to the battery pack box of some embodiments of the present invention, adjacent side walls of the reinforcing ribs are connected by transition through arc transition surfaces.

[0009] According to the battery pack box of some embodiments of the present invention, the box body is provided with a plurality of exhaust grooves arranged at intervals in the length direction of the box body, each exhaust groove is connected to the accommodating cavity through the exhaust port, and each exhaust groove is sealed by the cover plate.

[0010] According to the battery pack box of some embodiments of the present invention, there are multiple cover plates, and the multiple cover plates and the multiple exhaust grooves are arranged in a one-to-one correspondence.

[0011] According to the battery pack box of some embodiments of the present invention, a partition is provided in the box to divide the accommodating cavity into a plurality of sub-cavities, and each of the sub-cavities is provided with the exhaust port.

[0012] According to some embodiments of the present invention, the battery pack case further includes a first explosion-proof valve, which is provided on the case body and is configured to open at a first set pressure to discharge the gas in the exhaust chamber.

[0013] The utility model also provides a battery pack.

[0014] According to an embodiment of the present invention, the battery pack includes: a box body, which is the box body of the battery pack according to any of the above embodiments; a plurality of battery cells, which are respectively arranged in the accommodating cavity, and each of the battery cells is provided with a second explosion-proof valve, which is configured to open when a second set pressure is reached to discharge the gas in the battery cell into the accommodating cavity.

[0015] The battery pack according to the embodiment of the present invention has high exhaust efficiency and a stable exhaust process, which can eliminate the risk of explosion and delay thermal runaway of the battery pack, thereby reserving more escape time for users.

[0016] According to the battery pack of some embodiments of the present invention, the battery cells are provided with poles, the poles of two adjacent battery cells are connected by a connecting piece, and the second explosion-proof valve is located above the connecting piece; a fitting gap is formed between the battery cells and the side wall of the accommodating cavity; the battery pack also includes an insulating and heat-insulating layer, which fills part of the fitting gap and covers the connecting piece.

[0017] According to the battery pack of some embodiments of the present invention, a plurality of the battery cells are stacked in the thickness direction, and the second explosion-proof valve is provided at one end of the battery cell in the length direction; the exhaust cavity is formed on one side of the box body in the thickness direction of the battery cell, and the length direction of the exhaust cavity is parallel to the length direction of the battery cell, and the exhaust ports are respectively provided at both ends of the length of the box body corresponding to the battery cell.

[0018] According to the battery pack of some embodiments of the present invention, the box body is provided with a wiring space, in which high and low voltage connectors connected to the battery cells are passed through, and the wiring space is located on the other side of the box body in the thickness direction of the battery cells.

[0019] According to some embodiments of the present invention, the battery pack further includes a connecting piece protection plate, which is provided on one side of the battery cell along the length direction, and the insulating layer is filled between the connecting piece and the connecting piece protection plate.

[0020] The utility model further provides a battery device.

[0021] According to an embodiment of the present invention, the battery device includes: a plurality of battery packs, which are stacked in an up-and-down direction, and the battery packs are the battery packs according to any of the above embodiments.

[0022] According to the battery device of the embodiment of the present invention, the battery packs are relatively independent, and when thermal runaway occurs, zoned control can be implemented, thereby improving the safety of the battery.

[0023] According to some embodiments of the present invention, the battery device further includes: an upper frame, a lower frame, a shielding member and a distribution box, the multiple battery packs are stacked on the lower frame in sequence, the upper frame is supported at the top of the multiple battery packs, the distribution box is installed in the upper frame, the distribution box is electrically connected to the multiple battery packs respectively, and the shielding member is at least wrapped around the outside of the multiple battery packs and the upper frame.

[0024] The utility model further provides an electrical device.

[0025] According to an electric device according to an embodiment of the present invention, the electric device includes the battery pack according to any of the above embodiments, or the electric device includes the battery device according to any of the above embodiments.

[0026] According to the electric device of the embodiment of the present invention, the battery pack has good reliability, which is beneficial to improving the overall performance of the electric device.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 is an exploded view of a battery pack according to an embodiment of the present utility model;

[0030] Figure 2 This is an exploded view of a box according to an embodiment of the present utility model;

[0031] Figure 3 yes Figure 2A partial enlarged view of point A in the middle;

[0032] Figure 4 It is a partial schematic diagram of a box according to an embodiment of the present utility model;

[0033] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0034] Figure 6 This is a schematic diagram of the installation of the insulation layer according to an embodiment of the present utility model;

[0035] Figure 7 is a schematic diagram of a battery according to an embodiment of the present utility model;

[0036] Figure 8 1 is a partial exploded view of a battery according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] Battery device 1000,

[0039] Battery pack 100, upper frame 200, lower frame 300, shielding member 400, distribution box 500, high and low voltage connector 600,

[0040] Box body 1, box body 11, accommodating cavity 111, sub-cavity 1111, exhaust groove 112, opening 1121, exhaust port 113,

[0041] Cover plate 12, exhaust chamber 13, first explosion-proof valve 14, reinforcing rib 15, arc transition surface 151, partition 16, wiring space 17,

[0042] Battery cell 2, second explosion-proof valve 21, connecting piece 3, insulating and heat-insulating layer 4, connecting piece protection plate 5, top cover 6. DETAILED DESCRIPTION

[0043] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0046] Hereinafter, with reference to the accompanying drawings, a box body 1 of a battery pack according to an embodiment of the present invention will be described.

[0047] like Figures 1-8 As shown, the box body 1 of the battery pack according to an embodiment of the present invention includes: a box body 11 and a cover plate 12, a accommodating chamber 111 is provided in the box body 11, and a venting groove 112 is provided on the side wall of the box body 11, and the venting groove 112 has an opening 1121 away from the accommodating chamber 111; the cover plate 12 is provided on the box body 11 to seal the opening 1121 to define the venting chamber 13, and the box body 11 is provided with an exhaust port 113 for connecting the accommodating chamber 111 and the exhaust chamber 13.

[0048] Thus, the difficulty of forming the exhaust cavity 13 can be reduced, so that the cross-sectional size of the exhaust cavity 13 can be constructed to be larger, thereby improving the exhaust efficiency of the exhaust cavity 13 and ensuring the safety of the battery pack 100.

[0049] First, if Figure 1-Figure 3 As shown, the battery pack 100 includes a top cover 6, a housing 1, and battery cells 2. The housing 1 includes a body 11 and a cover 12. The body 11 is integrally die-cast and defines an upwardly open accommodating cavity 111. The top cover 6 is positioned above the body 11 and seals the accommodating cavity 111, which contains the battery cells 2.

[0050] An exhaust groove 112 is provided on the side wall of the box body 11. The exhaust groove 112 has an opening 1121 facing away from the accommodating chamber 111. The cover plate 12 is connected to the outer wall of the box body 11, for example, by friction welding. The cover plate 12 is used to cover the opening 1121 of the exhaust groove 112, so that the cover plate 12 and the box body 1 can define an exhaust chamber 13 at the exhaust groove 112. At the same time, an exhaust port 113 can be provided on the side wall of the box body 11 corresponding to the exhaust groove 112. The exhaust port 113 penetrates the side wall of the box body 11 in the thickness direction and is used to connect the accommodating chamber 111 with the exhaust chamber 13.

[0051] Specifically, when the battery cell 2 in the accommodating cavity 111 experiences thermal runaway, the battery cell 2 can discharge high-temperature and high-pressure gas into the accommodating cavity 111. The high-temperature and high-pressure gas in the accommodating cavity 111 can flow into the exhaust cavity 13 through the exhaust port 113. The high-temperature and high-pressure gas flowing into the exhaust cavity 13 can be further discharged to the outside of the box body 11, thereby delaying the thermal runaway of the battery pack 100.

[0052] It can be understood that by providing an exhaust groove 112 on the box body 11 and setting a cover plate 12 to cover the opening 1121 of the exhaust groove 112 to define the exhaust cavity 13, the difficulty of molding the exhaust cavity 13 can be reduced. Compared with the method of die-casting the exhaust cavity 13 as an integral part, the cross-sectional size of the exhaust cavity 13 can be constructed to be larger, which is conducive to improving the exhaust efficiency of the exhaust cavity 13.

[0053] According to the box body 1 of the battery pack of the embodiment of the present invention, the exhaust cavity 13 is defined by the box body 11 and the cover plate 12, which can reduce the difficulty of forming the exhaust cavity 13, so that the cross-sectional size of the exhaust cavity 13 can be constructed to be larger, thereby improving the exhaust efficiency of the exhaust cavity 13 and ensuring the safety of the battery pack 100.

[0054] In some embodiments of the present invention, the flow area of ​​the exhaust port 113 may be set to be greater than or equal to the flow area of ​​the first explosion-proof valve 14. In this way, the exhaust efficiency of the exhaust chamber 13 can be guaranteed.

[0055] In some embodiments of the present invention, Figure 2-Figure 3 As shown, the box body 1 of the battery pack according to the embodiment of the present invention further includes a reinforcing rib 15 . The reinforcing rib 15 is disposed in the exhaust cavity 13 , and both ends of the reinforcing rib 15 are respectively connected to opposite inner walls of the exhaust cavity 13 .

[0056] For example, the reinforcing rib 15 can be arranged on the side wall of the exhaust cavity 13 away from the cover plate 12 , and the reinforcing rib 15 can be extended in the up and down direction so that the upper and lower ends of the reinforcing rib 15 are respectively connected to the opposite inner walls of the exhaust cavity 13 .

[0057] Through the above arrangement, the reinforcing ribs 15 can effectively support the exhaust cavity 13 , thereby improving the anti-deformation capability of the exhaust cavity 13 and enhancing the reliability of the box body 1 .

[0058] In some embodiments of the present invention, Figure 2-Figure 3 As shown, multiple reinforcing ribs 15 can be provided, with the multiple reinforcing ribs 15 spaced apart along the length of the exhaust cavity 13. For example, the multiple reinforcing ribs 15 can be evenly spaced along the length of the exhaust cavity 13; alternatively, the multiple reinforcing ribs 15 can be unevenly spaced along the length of the exhaust cavity 13, which is not limited in the present invention. As a result, the reinforcing ribs 15 can better support the exhaust cavity 13 and improve the structural stability of the exhaust cavity 13.

[0059] In some embodiments of the present invention, Figure 3 As shown, adjacent sidewalls of the reinforcing ribs 15 can be connected by arcuate transition surfaces 151. When high-temperature, high-pressure gas flows into the exhaust cavity 13, the arcuate transition surfaces 151 can guide the high-temperature, high-pressure gas. This reduces flow resistance, improves the exhaust efficiency of the exhaust cavity 13, ensures the safety of the battery pack 100, and reduces the difficulty of forming the reinforcing ribs 15, thereby reducing the difficulty of processing the box body 11.

[0060] In some embodiments of the present invention, Figure 2 As shown, in the length direction of the box body 11 (reference Figure 2 The box body 11 is provided with a plurality of exhaust slots 112 arranged at intervals, each exhaust slot 112 is connected to the accommodating cavity 111 through an exhaust port 113, and each exhaust slot 112 is sealed by a cover plate 12 to define an exhaust cavity 13 respectively.

[0061] For example, two exhaust slots 112 can be provided, and the two exhaust slots 112 are arranged along the length direction of the box body 11 (refer to FIG. Figure 2 The two exhaust grooves 112 are both sealed by the cover plate 12, so that the box body 1 can define two relatively independent exhaust cavities 13, so that the high-temperature and high-pressure gas in the accommodating cavity 111 can be discharged outward through the two exhaust cavities 13 respectively.

[0062] Through the above arrangement, the exhaust efficiency of the box body 1 can be improved, and the diffusion speed of the high-temperature and high-pressure gas in the accommodating cavity 111 can be reduced, which is beneficial to delaying the thermal diffusion of the battery pack 100 and improving the safety of the battery pack 100.

[0063] In some embodiments of the present invention, Figure 2As shown, the cover plate 12 can be provided in a plurality, and the plurality of cover plates 12 are provided in a one-to-one correspondence with the plurality of exhaust slots 112. Through the above arrangement, the size of a single cover plate 12 can be reduced, the difficulty of installing the cover plate 12 is reduced, and the installation accuracy of the cover plate 12 can be improved, which is conducive to eliminating the matching gap between the box body 11 and the cover plate 12, and improving the sealing of the exhaust cavity 13.

[0064] In some embodiments of the present invention, Figure 2 As shown, a partition 16 can be provided in the box body 1, and the partition 16 is multiple, and the multiple partitions 16 are arranged along the length direction of the box body 11 (refer to Figure 2 The battery cells 2 are spaced apart and arranged in the left and right directions as shown, so as to divide the accommodating chamber 111 into a plurality of sub-cavities 1111. Each sub-cavity 1111 is equipped with a plurality of battery cells 2, and each sub-cavity 1111 is provided with an exhaust port 113. When a battery cell 2 in a sub-cavity 1111 experiences thermal runaway, high-temperature and high-pressure gas flowing into the sub-cavity 1111 can flow into the exhaust cavity 13 through the corresponding exhaust port 113.

[0065] It can be understood that by dividing the accommodating cavity 111 into multiple sub-cavities 1111, when the battery cell 2 experiences thermal runaway, the partition 16 can block the high-temperature and high-pressure gas to a certain extent to achieve zoning control, thereby delaying the thermal runaway of the battery pack 100 and reserving more escape time for the user.

[0066] In some embodiments of the present invention, the box body 11 further includes a first explosion-proof valve 14. The first explosion-proof valve 14 is disposed on the box body 11 and opposite the exhaust chamber 13. The first explosion-proof valve 14 is configured to open when the pressure in the exhaust chamber 13 reaches a first set pressure, allowing the first explosion-proof valve 14 to discharge the high-temperature, high-pressure gas flowing into the exhaust chamber 13. It should be noted that the first set pressure can be selected based on experimental data and the experience of technicians.

[0067] Specifically, when thermal runaway occurs in the battery cell 2 within the accommodating cavity 111, the battery cell 2 can discharge high-temperature, high-pressure gas into the accommodating cavity 111. The high-temperature, high-pressure gas within the accommodating cavity 111 can flow into the exhaust cavity 13 through the exhaust port 113. At this time, as the air pressure within the exhaust cavity 13 gradually increases, the first explosion-proof valve 14 opens and discharges the high-temperature, high-pressure gas within the exhaust cavity 13 to the outside of the box body 11, thereby delaying thermal runaway of the battery pack 100. This ensures the safety and reliability of the box body 1.

[0068] The present invention also provides a battery pack 100 .

[0069] like Figures 1-8As shown, the battery pack 100 according to an embodiment of the present invention includes: a box body 1 and a plurality of battery cells 2, the box body 1 is the box body 1 of the battery pack according to any of the above embodiments; the plurality of battery cells 2 are respectively arranged in the accommodating cavity 111, and each battery cell 2 is provided with a second explosion-proof valve 21, and the second explosion-proof valve 21 is configured to open when the second set pressure is reached to discharge the gas in the battery cell 2 into the accommodating cavity 111.

[0070] First, if Figure 1 and Figure 6 As shown, the battery pack 100 includes a box body 1 and multiple battery cells 2. The box body 1 is provided with a accommodating cavity 111. The multiple battery cells 2 are respectively arranged in the accommodating cavity 111. For example, the multiple battery cells 2 can be stacked or spaced apart in the accommodating cavity 111. The battery cells 2 include a shell and a battery cell. The battery cell is arranged in the shell.

[0071] Each battery cell 2 is provided with a second explosion-proof valve 21 on its housing. The second explosion-proof valve 21 is configured to open when the pressure within the housing reaches a second set pressure, allowing the battery cell 2 to discharge high-temperature, high-pressure gas through the second explosion-proof valve 21, thereby preventing explosion of the battery cell 2. It should be noted that the second set pressure can be selected based on experimental data and the experience of technicians.

[0072] Specifically, when thermal runaway occurs in the battery cell 2 in the accommodating cavity 111, the pressure in the battery cell 2 increases. When the pressure reaches the second set pressure, the second explosion-proof valve 21 opens, and the battery cell 2 can discharge high-temperature and high-pressure gas into the accommodating cavity 111 through the second explosion-proof valve 21; the high-temperature and high-pressure gas in the accommodating cavity 111 can flow into the exhaust cavity 13 through the exhaust port 113. At this time, as the air pressure in the exhaust cavity 13 gradually increases, the first explosion-proof valve 14 opens, and the first explosion-proof valve 14 can discharge the high-temperature and high-pressure gas in the exhaust cavity 13 to the outside of the box body 11, thereby delaying the thermal runaway of the battery pack 100.

[0073] According to the battery pack 100 of the embodiment of the present invention, the exhaust efficiency is high and the exhaust process is stable, which can eliminate the risk of explosion and delay the thermal runaway of the battery pack 100, thereby reserving more escape time for the user.

[0074] In some embodiments of the present invention, the battery cell 2 is provided with a pole, the poles of two adjacent battery cells 2 are connected by a connecting plate 3, and the second explosion-proof valve 21 is located above the connecting plate 3; a fitting gap is formed between the battery cell 2 and the side wall of the accommodating cavity 111; the battery pack 100 also includes an insulating and heat-insulating layer 4, which fills part of the fitting gap and covers the connecting plate 3.

[0075] For example, refer to Figure 6As shown, the lower half of the battery cell 2 is provided with a pole, and the poles of two adjacent battery cells 2 are connected by a connecting plate 3 to arrange multiple battery cells 2 in series. The upper half of the battery cell 2 is provided with a second explosion-proof valve 21, and the second explosion-proof valve 21 is located above the pole and is arranged above the connecting plate 3 at an interval.

[0076] A clearance can be formed between the battery cell 2 and the sidewall of the accommodating cavity 111, with the second explosion-proof valve 21 and the connecting piece 3 both located within the clearance. The battery pack 100 also includes an insulating layer 4, which fills the lower half of the clearance and covers the connecting piece 3. The second explosion-proof valve 21 communicates with the exhaust port 113 through the upper half of the clearance.

[0077] It should be noted that the material of the insulating layer 4 can be any of a variety of insulating and heat-insulating materials, such as low-density heat-resistant silicone and epoxy resin. For example, the insulating layer 4 can be made of low-density heat-resistant silicone. During processing, liquid low-density heat-resistant silicone is first injected into the fitting gap to cover the connecting piece 3, and then the low-density heat-resistant silicone is cured to complete the installation of the insulating layer 4.

[0078] It is understood that the insulating layer 4 can prevent the connecting piece 3 from direct contact with high-temperature, high-pressure gas, thereby preventing secondary runaway of the battery cells 2 and improving the safety performance of the battery pack 100. In addition, the insulating layer 4 can also be used to secure the battery cells 2 and provide a certain degree of cushioning when the battery pack 100 is subjected to impact, thereby improving the reliability of the battery pack 100.

[0079] In some embodiments of the present invention, multiple battery cells 2 are stacked in the thickness direction, and the second explosion-proof valve 21 is arranged at one end of the battery cell 2 in the length direction; the exhaust cavity 13 is formed on one side of the box body 1 in the thickness direction of the battery cell 2, and the length direction of the exhaust cavity 13 is parallel to the length direction of the battery cell 2, and the box body 1 is provided with exhaust ports 113 at both ends of the length corresponding to the battery cell 2.

[0080] For example, refer to Figure 1 and Figure 6 As shown, multiple battery cells 2 can be arranged in the thickness direction (reference Figure 6 The battery pack is stacked in the front-to-back direction (shown in FIG. 1 ) to form a battery pack. The battery cells 2 are stacked in the front-to-back direction (shown in FIG. 1 ). Figure 1 A positive electrode column and a negative electrode column are respectively provided at both ends (in the left and right directions as shown), and multiple battery cells 2 are arranged alternately. The positive electrode column of a battery cell 2 and the negative electrode column of an adjacent battery cell 2 are located at the same end and are connected by a connecting piece 3 to arrange multiple battery cells 2 in series.

[0081] At the same time, a second explosion-proof valve 21 can be provided at one end of the battery cell 2 along its length. For example, the second explosion-proof valve 21 can be provided at the end of the battery cell 2 where the negative electrode is provided, so that the battery pack is provided with a second explosion-proof valve 21 on both sides along the length of the battery cell 2. Of course, a second explosion-proof valve 21 can also be provided at both ends of the battery cell 2 along its length, which will not be described in detail here.

[0082] Among them, the exhaust cavity 13 can be formed on one side of the box body 1 in the thickness direction of the battery cell 2, and the length direction of the exhaust cavity 13 is parallel to the length direction of the battery cell 2. The box body 1 is provided with exhaust ports 113 at both ends of the length corresponding to the battery cell 2, so that the second explosion-proof valves 21 located on both sides of the battery pack can be connected to the exhaust cavity 13 through the corresponding exhaust ports 113 respectively.

[0083] Through the above-mentioned setting, the distance between the second explosion-proof valve 21 and the exhaust port 113 can be shortened, so that the high-temperature and high-pressure gas can be discharged from the accommodating cavity 111 more quickly, which is beneficial to reducing the temperature rise rate of the accommodating cavity 111, delaying the thermal runaway of the battery pack 100, and improving the safety of the battery pack 100.

[0084] In some embodiments of the present invention, Figure 4 and Figure 6 As shown, the box body 1 is provided with a wiring space 17, in which a high and low voltage connector 600 connected to the battery cell 2 is provided. The wiring space 17 is located in the thickness direction of the box body 1 in the battery cell 2 (reference Figure 4 the other side in the front-to-back direction shown).

[0085] Through the above-mentioned setting, the wiring space 17 and the exhaust cavity 13 can be separated to prevent high-temperature and high-pressure gas from damaging the high and low-pressure connectors 600, thereby reducing the probability of secondary loss, reducing losses, and improving the reliability of the battery pack 100.

[0086] In some embodiments of the present invention, Figure 1 and Figure 6 As shown, the battery pack 100 further includes a connecting piece protection plate 5, which is provided on the battery cell 2 along the length direction (reference Figure 1 The connecting piece 3 and the connecting piece protection plate 5 are filled with an insulating layer 4. It should be noted that the connecting piece protection plate 5 can be made of a rigid material such as metal (such as aluminum) or plastic.

[0087] It is understood that by providing the connecting tab protection plate 5 and filling the insulating layer 4 between the connecting tab 3 and the connecting tab protection plate 5, when the battery pack 100 is hit, the connecting tab protection plate 5 and the insulating layer 4 can provide a double buffering effect, thereby reducing the impact force on the connecting tab 3. In addition, the insulating layer 4 can prevent the connecting tab protection plate 5 from rigidly contacting the connecting tab 3, thereby improving the stability of the battery pack 100.

[0088] The present invention further provides a battery device 1000 .

[0089] like Figure 7-Figure 8 As shown, a battery device 1000 according to an embodiment of the present invention includes: multiple battery packs 100, which are stacked in an up-and-down direction. The battery packs 100 are battery packs 100 according to any of the above embodiments. It should be noted that the number of battery packs 100 can be selected as needed to combine battery devices 1000 with different voltage levels.

[0090] According to the battery device 1000 of the embodiment of the present invention, the battery packs 100 are relatively independent, and when thermal runaway occurs, zoned control can be implemented, thereby improving the safety of the battery device 1000.

[0091] In some embodiments of the present invention, the battery device 1000 according to the embodiment of the present invention further includes: an upper frame 200, a lower frame 300, a shielding member 400 and a distribution box 500, and multiple battery packs 100 are stacked in sequence on the lower frame 300, the upper frame 200 is supported at the top of the multiple battery packs 100, and a distribution box 500 is installed in the upper frame 200. The distribution box 500 is electrically connected to the multiple battery packs 100 respectively, and the shielding member 400 is at least wrapped around the outside of the multiple battery packs 100 and the upper frame 200.

[0092] For example, refer to Figure 7-Figure 8 As shown, the battery assembly 1000 further includes an upper frame 200, a lower frame 300, a shielding member 400, a distribution box 500, and high and low voltage connectors 600. Multiple battery packs 100 are stacked on the lower frame 300 from bottom to top. The upper frame 200 supports the top of the multiple battery packs 100. The distribution box 500 is installed within the upper frame 200. The distribution box 500 is electrically connected to the multiple battery packs 100 via the high and low voltage connectors 600 to achieve power and communication connections between the multiple battery packs 100. At the same time, the shielding member 400 at least wraps around the outside of the multiple battery packs 100 and the upper frame 200 to protect the battery packs 100, the distribution box 500, and the high and low voltage connectors 600.

[0093] For example, the shielding member 400 may be constructed as a metal skin that wraps around the outer sides of the plurality of battery packs 100 and the upper frame 200 and is fixed by bolts.

[0094] Through the above arrangement, the battery pack 100 can be fully protected, and the stability of the battery device 1000 is improved. In addition, the battery device 1000 has a simple structure and is easy to process. It can also be flexibly adjusted according to the vehicle model, thereby improving the versatility of the battery device 1000.

[0095] The utility model further provides an electrical device.

[0096] According to an electric device according to an embodiment of the present invention, the electric device includes the battery pack 100 according to any one of the above embodiments, or the electric device includes the battery device 1000 according to any one of the above embodiments.

[0097] According to the electric device of the embodiment of the present invention, the battery pack 100 has good reliability, which is beneficial to improving the overall performance of the electric device.

[0098] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0099] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack box (1), characterized in that: include: A box body (11), wherein a receiving cavity (111) is provided in the box body (11), and a venting groove (112) is provided on a side wall of the box body (11), wherein the venting groove (112) has an opening (1121) facing away from the receiving cavity (111); A cover plate (12) is provided on the box body (11) to cover the opening (1121) to define an exhaust cavity (13); the box body (11) is provided with an exhaust port (113) for connecting the accommodating cavity (111) and the exhaust cavity (13).

2. The battery pack box (1) according to claim 1, characterized in that: It also includes a reinforcing rib (15), which is arranged in the exhaust cavity (13) and has two ends connected to opposite inner walls of the exhaust cavity (13).

3. The battery pack box (1) according to claim 2, characterized in that: The reinforcing ribs (15) are multiple and are arranged at intervals along the length direction of the exhaust cavity (13).

4. The battery pack box (1) according to claim 2, characterized in that: Adjacent side walls of the reinforcing ribs (15) are transitionally connected via arc transition surfaces (151).

5. The battery pack box (1) according to claim 1, characterized in that: In the longitudinal direction of the box body (11), the box body (11) is provided with a plurality of exhaust grooves (112) arranged at intervals, each exhaust groove (112) is connected to the accommodating cavity (111) through the exhaust port (113), and each exhaust groove (112) is sealed by the cover plate (12).

6. The battery pack box (1) according to claim 5, characterized in that: There are multiple cover plates (12), and the multiple cover plates (12) and the multiple exhaust slots (112) are arranged in a one-to-one correspondence.

7. The battery pack box (1) according to any one of claims 1 to 6, characterized in that: A partition (16) is provided in the box body (1) to divide the accommodating chamber (111) into a plurality of sub-chambers (1111), and each sub-chamber (1111) is provided with the exhaust port (113).

8. The battery pack box (1) according to any one of claims 1 to 6, characterized in that: The box body (1) further comprises a first explosion-proof valve (14), which is provided on the box body (11) and is configured to open at a first set pressure to discharge the gas in the exhaust chamber (13).

9. A battery pack (100), characterized in that: include: A box (1), wherein the box (1) is a box (1) of a battery pack according to any one of claims 1 to 8; A plurality of battery cells (2) are provided in the accommodating chamber (111), each of the battery cells (2) being provided with a second explosion-proof valve (21), the second explosion-proof valve (21) being configured to open when a second set pressure is reached to discharge gas in the battery cell (2) into the accommodating chamber (111).

10. The battery pack (100) according to claim 9, characterized in that: The battery cells (2) are provided with poles, the poles of two adjacent battery cells (2) are connected via a connecting piece (3), and the second explosion-proof valve (21) is located above the connecting piece (3); a fitting gap is formed between the battery cells (2) and the side wall of the accommodating cavity (111); The battery pack (100) further comprises an insulating and heat-isolating layer (4), wherein the insulating and heat-isolating layer (4) fills a portion of the fitting gap and covers the connecting piece (3).

11. The battery pack (100) according to claim 9, characterized in that: A plurality of battery cells (2) are stacked in a thickness direction, and the second explosion-proof valve (21) is provided at one end of the battery cell (2) in a length direction; The exhaust cavity (13) is formed on one side of the box body (1) in the thickness direction of the battery cell (2); the length direction of the exhaust cavity (13) is parallel to the length direction of the battery cell (2); and the exhaust ports (113) are respectively provided at both ends of the box body (1) corresponding to the length of the battery cell (2).

12. The battery pack (100) according to claim 11, characterized in that: The box body (1) is provided with a wiring space (17), in which a high- and low-voltage connector (600) connected to the battery cell (2) is passed. The wiring space (17) is located on the other side of the box body (1) in the thickness direction of the battery cell (2).

13. The battery pack (100) according to claim 10, characterized in that: The battery pack (100) further comprises a connecting piece protection plate (5), the connecting piece protection plate (5) being arranged on one side of the battery cell (2) along the length direction, and the insulating heat-insulating layer (4) being filled between the connecting piece (3) and the connecting piece protection plate (5).

14. A battery device (1000), characterized in that: include: A plurality of battery packs (100), wherein the plurality of battery packs (100) are stacked in an up-down direction, and the battery pack (100) is a battery pack (100) according to any one of claims 9 to 13.

15. The battery device (1000) according to claim 14, characterized in that Also includes: An upper frame (200), a lower frame (300), a shielding member (400) and a distribution box (500), wherein the plurality of battery packs (100) are stacked on the lower frame (300) in sequence, the upper frame (200) is supported on the uppermost portion of the plurality of battery packs (100), the distribution box (500) is installed in the upper frame (200), the distribution box (500) is electrically connected to the plurality of battery packs (100) respectively, and the shielding member (400) is at least wrapped around the outer sides of the plurality of battery packs (100) and the upper frame (200).

16. An electrical device, characterized in that: The electric device comprises a battery pack (100) according to any one of claims 9 to 13, or the electric device comprises a battery device (1000) according to claim 14 or 15.

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