Exhaust structure, battery pack, and vehicle

Abstract

A vehicle having a battery pack, the battery pack comprising at least one layer of cell groups, each layer of cell groups comprising at least two sub-cell groups (10), each sub-cell group (10) comprising a plurality of cells, and the battery pack having an exhaust structure (3). The exhaust structure (3) is arranged between adjacent sub-cell groups (10) of the same layer, and comprises an isolation member (30), blocking members (72), and at least two exhaust holes (73). The isolation member (30) is configured to separate adjacent sub-cell groups (10); and the blocking members (72) are arranged at two ends of the isolation member (30) and are connected to the isolation member (30), wherein the isolation member (30) and the blocking members (72) are used for defining a plurality of exhaust channels (71); and the at least two exhaust holes (73) are provided in the isolation member (30), are located above the exhaust channels (71) and are in communication with the corresponding exhaust channels (71).

Description

Exhaust structure, battery pack and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application No. 202322692246.7, filed on September 28, 2023, entitled “Exhaust Structure, Battery Pack and Vehicle,” the entire contents of which are incorporated herein for all purposes. Technical Field

[0003] The present disclosure relates to the field of batteries, and more particularly to an exhaust structure, a battery pack, and a vehicle. Background Art

[0004] As an energy storage device, the power battery pack is a core component of hybrid and electric vehicles. It primarily consists of multiple battery cells, a battery tray, and a cover. The battery tray is mounted on the bottom of the vehicle, and the cover is sealed to the battery tray, forming a sealed space that holds the thousands of battery cells. To prevent explosions, the battery cells are typically equipped with explosion-proof valves. During use, if the air pressure in the enclosed space increases to a certain level, the explosion-proof valve opens, allowing the air inside the battery cells to escape through the valve.

[0005] In related technologies, when a battery pack has two or more rows of battery cells, when a battery cell experiences thermal runaway, it will not only spread to other battery cells in the same row, but will also affect the battery cells in adjacent rows, causing a chain reaction of thermal runaway in the entire power battery pack, thereby reducing the safety of the power battery pack. Therefore, how to collect and discharge exhaust gas is also a key technology in the battery pack.

[0006] Summary of the Invention

[0007] The present invention is proposed to solve at least one of the above problems. According to a first aspect of the present disclosure, there is provided an exhaust structure for use in a battery pack, the battery pack comprising at least one layer of cell groups, each layer of cell groups comprising at least two sub-cell groups, the sub-cell groups comprising a plurality of cells, the plurality of cells in the sub-cell groups extending along a first direction, the plurality of cells in the sub-cell groups arranged along a second direction, the exhaust structure being disposed between two adjacent sub-cell groups in the same layer, comprising:

[0008] an isolation member configured to separate two adjacent sub-cell groups;

[0009] a barrier member disposed at both ends of the isolation member along the second direction and connected to the isolation member, wherein the isolation member and the barrier member are used to define a plurality of exhaust channels, each of the exhaust channels having a first opening and a second opening opposite to each other at both ends of the isolation member, the barrier member sealing the first opening and the second opening, and each sub-cell group on both sides of the isolation member corresponding to at least one exhaust channel;

[0010] At least two exhaust holes are provided in the isolation component, are located above the exhaust channels and are communicated with the corresponding exhaust channels, wherein each exhaust channel corresponds to at least one exhaust hole.

[0011] In some embodiments, the barrier member includes a baffle and a heat insulating layer, and the heat insulating layer is disposed on a side of the baffle facing the exhaust passage.

[0012] In some embodiments, the thermal insulation layer is made of mica material.

[0013] In some embodiments, the baffle is further provided with a first snap-fit ​​portion, and the isolation member is provided with a second snap-fit ​​portion that cooperates with the first snap-fit ​​portion. The baffle and the isolation member are snap-fitted and connected via the first snap-fit ​​portion and the second snap-fit ​​portion.

[0014] In some embodiments, a limiting portion is further provided on the baffle, and a matching portion that matches the limiting portion is provided on the isolation component.

[0015] In some embodiments, the barrier member is adhered to the isolation member by adhesive.

[0016] In some embodiments, each of the exhaust channels has an air inlet, and the air inlet faces the battery cell adjacent to each of the exhaust channels.

[0017] In some embodiments, the isolation member includes a first side and a second side opposite to the first side, wherein at least one exhaust channel of the plurality of exhaust channels is disposed on the first side, and at least one exhaust channel of the plurality of exhaust channels is disposed on the second side.

[0018] In some embodiments, the isolation member includes a base, a first extension portion and a second extension portion extending from the base toward the battery cell on the first side, and a third extension portion and a fourth extension portion extending from the base toward the battery cell on the second side, wherein the first extension portion and the second extension portion are spaced apart, the first extension portion, the second extension portion and the partition member are used to define a first exhaust channel, the third extension portion and the fourth extension portion are spaced apart from each other, and the third extension portion, the fourth extension portion and the partition member are used to define a second exhaust channel.

[0019] In some embodiments, the isolation member also includes a top plate, the base may include a first side plate, a second side plate spaced apart and parallel to the first side plate, and a bottom plate, the top plate connects the top of the first side plate and the top of the second side plate, the bottom plate connects the bottom of the first side plate and the bottom of the second side plate, the part of the top plate extending outside the first side plate serves as the first extension portion, and the part of the top plate extending outside the second side plate serves as the third extension portion.

[0020] In some embodiments, a first bolt hole is provided on the bottom plate.

[0021] A second aspect of the present disclosure provides a battery pack, comprising:

[0022] Box;

[0023] At least one layer of battery cell groups, the at least one layer of battery cell groups being disposed in the box; wherein each layer of the battery cell groups comprises at least two sub-battery cell groups, the sub-battery cell groups comprising a plurality of battery cells, the plurality of battery cells in the sub-battery cell groups all extending along a first direction, and the plurality of battery cells in the sub-battery cell groups being arranged along a second direction;

[0024] The aforementioned exhaust structure, each of which is arranged between two adjacent sub-cell groups on the same layer.

[0025] In some embodiments, the box includes a tray for supporting at least one layer of battery cell groups, and the exhaust structure is connected to the tray.

[0026] In some embodiments, a cold plate is provided below at least one layer of the battery cell group, and the exhaust structure and the tray are connected via a connector, which also passes through the cold plate.

[0027] In some embodiments, the battery pack includes at least two layers of battery cell groups, the cold plate is arranged between any two adjacent layers of battery cell groups, an intermediate beam is provided on the tray, the exhaust structure is located above the intermediate beam, and the exhaust structure and the intermediate beam of the tray are connected by the connecting member.

[0028] In some embodiments, the middle beam is arranged between two adjacent sub-battery cell groups below the exhaust structure, and the middle beam has at least two sub-spaces, and the adjacent sub-spaces are isolated from each other, wherein a second bolt hole is provided on the top of the middle beam, and the second bolt hole is connected to the sub-space located on the top layer, and the exhaust structure and the middle beam of the tray are connected through the first bolt hole, the second bolt hole and the connecting member on the exhaust structure.

[0029] In some embodiments, the connecting member includes a protrusion, one of the middle beam and the exhaust structure is provided with the protrusion, and the other is provided with a groove matching the protrusion, and the protrusion is provided in the groove.

[0030] In some embodiments, the battery pack includes:

[0031] At least two layers of battery cell packs;

[0032] The box body includes a accommodating cavity and a distribution cavity. The distribution cavity is located on one side of the accommodating cavity. At least two layers of the battery cell groups are arranged in the accommodating cavity. There is a gap between the top surface of the exhaust structure and the cover plate of the box body. The gas discharged from the exhaust hole of the exhaust structure enters the distribution cavity through the gap.

[0033] In some embodiments, the battery pack includes: at least two layers of battery cell groups;

[0034] The box body includes at least two layers of accommodating cavities and at least two distribution cavities; the at least two distribution cavities correspond one-to-one to the at least two layers of accommodating cavities, and each distribution cavity is arranged in the corresponding accommodating cavity, and the at least two layers of battery cell groups correspond one-to-one to the at least two layers of accommodating cavities, and each layer of battery cell groups is arranged in the corresponding layer of accommodating cavities, wherein,

[0035] There is a gap between the top surface of the exhaust structure and the cover plate of the box body, and the gas exhausted from the exhaust hole of the exhaust structure enters the power distribution cavity through the gap.

[0036] In some embodiments, the isolation member includes a base, a first extension portion extending from the base toward the battery cell on the first side, and a third extension portion extending from the base toward the battery cell on the second side, wherein, in the height direction of the accommodating cavity, the top surface of the base is higher than the first extension portion and the third extension portion, the top surface of the base abuts the cover plate, and there is the gap between the first extension portion and the third extension portion and the cover plate of the box body, and the height direction of the accommodating cavity is perpendicular to the first direction and the second direction.

[0037] In some embodiments, a first exhaust guide plate is provided in the power distribution cavity, and the gas entering the power distribution cavity is guided to the two ends of the power distribution cavity through the first exhaust guide plate.

[0038] In some embodiments, an exhaust port or an explosion-proof valve is provided on the box body, and a second exhaust guide plate is also provided in the distribution cavity. The second exhaust guide plate covers the exhaust port or the explosion-proof valve, and the gas is guided to the exhaust port or the explosion-proof valve through the second exhaust guide plate.

[0039] According to a third aspect of the present disclosure, a vehicle is provided, comprising: a vehicle body, and any one of the above-mentioned battery packs arranged on the vehicle body.

[0040] According to the exhaust structure, battery pack and vehicle provided by the embodiments of the present disclosure, the present disclosure separates adjacent sub-cell groups by arranging an isolation member between adjacent sub-cell groups on the same layer; the isolation member and the barrier member are used to define a plurality of exhaust channels, so that the gas generated by the battery cells can be directly discharged into the exhaust channel, and the gas in the exhaust channel can also be directed to be discharged through the exhaust holes above the exhaust channel, and the adjacent sub-cell groups are separated by the isolation member, which can prevent the gas discharged from the battery cell from being sprayed onto the adjacent sub-cell groups in opposite positions, thereby avoiding the gas discharged from the battery cell from spreading to other battery cells in the same row and causing damage to other battery cells, reducing the risk of thermal runaway, and improving the safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] FIG1 is a schematic structural diagram of a neutron cell group in a layer of cell groups provided by one embodiment of the present invention;

[0043] FIG2 is a schematic diagram of an exhaust structure provided by an embodiment of the present invention;

[0044] FIG3A is a schematic cross-sectional view of a battery pack having two layers of battery cells provided by one embodiment of the present invention;

[0045] FIG3B is a schematic cross-sectional view of a battery pack having two layers of battery cells provided by one embodiment of the present invention;

[0046] FIG3C is an enlarged schematic diagram of the structure of region G in FIG3B ;

[0047] FIG4 is a side view of the exhaust structure in FIG2 according to an embodiment of the present invention;

[0048] FIG5 is a schematic cross-sectional view taken along section line AA in FIG4 according to an embodiment of the present invention;

[0049] FIG6 is a partial enlarged schematic diagram of the structure of region B in FIG5 according to an embodiment of the present invention;

[0050] FIG7 is a schematic top view of the exhaust flow direction provided by one embodiment of the present invention;

[0051] FIG8 is a partial schematic diagram of a battery pack provided in one embodiment of the present invention;

[0052] FIG9 is an enlarged schematic diagram of the structure of the H region in FIG8 ;

[0053] FIG10 is a schematic structural diagram of a vehicle.

[0054] Reference numerals:

[0055] 10-sub-cell group 30-second buckle portion 301 of the isolation member 71-exhaust channel 72-blocking member 73-exhaust hole

[0056] 721 - baffle 722 - first buckle portion 723 - adhesive 311 - first side panel 312 - second side panel 313 - bottom panel 731 - first extension portion 732 - second extension portion 733 - third extension portion 110 - tray 111 - middle beam 112 - connector 80 - second exhaust guide plate 801 - air inlet DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0058] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without one or more of these details. In other instances, certain technical features well known in the art are not described to avoid confusion with the present invention.

[0059] It should be understood that the present invention can be implemented in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to make disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0060] In order to fully understand the present invention, a detailed structure will be provided in the following description to illustrate the technical solution proposed by the present invention. Optional embodiments of the present invention are described in detail below. However, in addition to these detailed descriptions, the present invention may also have other implementations.

[0061] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0062] The present disclosure provides a battery pack, as shown in FIG1 , comprising: a box body, at least one layer of cell groups and at least one exhaust structure 3, wherein the at least one layer of cell groups 10 is arranged in the box body; each layer of cell groups 10 comprises at least two sub-cell groups 10, and each sub-cell group 10 comprises a plurality of cells; the plurality of cells in the sub-cell groups all extend along a first direction, that is, the length direction of the cells is the first direction, and the plurality of cells in the sub-cell groups are arranged along a second direction; the second direction is different from the first direction, and when there are at least two layers of cell groups, the at least two layers of cell groups are stacked along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other, wherein the third direction is also the height direction of the accommodating cavity of the box body; compared with the existing battery pack cell arrangement method, when the battery pack comprises at least two layers of cell groups, and each sub-cell group in at least one layer of cell groups is a module-free cell assembly method, the cells can be arranged more compactly in the battery pack, and the height space of the battery pack can be fully utilized.

[0063] The exhaust structure 3 may be provided between two adjacent sub-cell groups on the same layer. For example, one exhaust structure 3 may be provided between each of the adjacent sub-cell groups 10 .

[0064] In the above solution, the exhaust structure 3 is provided between two adjacent sub-cell groups 10 in the same layer, and the adjacent sub-cell groups 10 are separated by the isolation members 30 included in the exhaust structure 3 . As shown in Figures 2 to 6, an electrode is provided at one end of the battery cell near the exhaust structure 3. The exhaust structure 3 includes an isolation member 30 and a barrier member 72, wherein the isolation member 30 and the barrier member are used to define a plurality of exhaust channels 71. Each exhaust channel 71 has a first opening and a second opening opposite to each other at both ends of the isolation member 30. The barrier members 72 provided at both ends of the isolation member 30 and connected to the isolation member 30 seal the first opening and the second opening of the exhaust channel 71, thereby enabling the gas generated by the battery cell to be directly discharged into the exhaust channel 71, as shown by the arrows in Figure 2. Moreover, since the barrier member 72 seals the first opening and the second opening, the isolation member 30 and the barrier member 72 cooperate to form an effective exhaust channel 71, thereby achieving directional discharge of thermal runaway gas from the oppositely arranged battery cells. In addition, the isolation member 30 separates the adjacent sub-cell groups 10, thereby preventing the gas discharged from the battery cell from being sprayed onto the battery cells of the adjacent sub-cell groups 10 located opposite to each other, thereby preventing the gas discharged from the battery cell from damaging other battery cells and reducing the risk of thermal runaway. The above-mentioned structures are described in detail below with reference to the accompanying drawings.

[0065] When determining the type of each battery cell, illustratively, each battery cell can be a short battery cell or a long battery cell. It should be explained that short battery cells and long battery cells have clear definitions in this field. A short battery cell is a battery cell whose length does not exceed a first preset value, and a long battery cell is a battery cell whose length exceeds a second preset value. The above-mentioned first preset value and second preset value may be equal or unequal, and even the first preset value may be greater than the second preset value. Exemplarily, the length of a short battery cell may be 400mm-900mm, and the length of a long battery cell may be 600mm-1200mm. With reference to Figure 1, the shape of the battery cell may specifically be a short battery cell or a long battery cell with a thinner thickness. In some embodiments, the battery cell may also be a rectangular block battery cell with a slightly thicker thickness. For example, the rectangular block battery cell may be a square aluminum shell battery cell, or even a cylindrical battery cell.

[0066] In some embodiments, electrodes, specifically positive and negative electrodes, are provided at both ends of the cell in the first direction. This means that an electrode is provided at each end of the cell in the first direction, which can be either a positive or negative electrode. Of course, the positive and negative electrodes can be provided at only one end of the cell in the first direction, or on the surface of the cell along the third direction. As shown in Figure 1, each sub-cell group 10 includes multiple cells, and the multiple cells in each sub-cell group 10 are arranged sequentially along the second direction. The multiple cells in each sub-cell group 10 are arranged in a straight line along the same second direction. It can be seen that the arrangement direction of each sub-cell group 10 is different from the first direction. For example, the second direction can be substantially perpendicular to the first direction, so that the positive and negative electrodes in each sub-cell group 10 are located on either side of the sub-cell group 10, thereby increasing the spacing between the different electrodes and preventing the risk of high-voltage arc breakdown. For example, when the battery cell is thinner, the second direction may be the thickness direction of the battery cell, so that more battery cells can be arranged in each sub-battery cell group 10, thereby increasing the density of the battery cells and thus increasing the energy density of the battery pack.

[0067] When determining the number of layers of cell groups in a battery pack, the number of cell groups that can be included in the battery pack can be two layers, three layers, four layers, five layers, etc. By adopting an arrangement of at least two layers of cell groups in the battery pack, the space in the battery pack can be fully utilized and the energy density of the battery pack can be improved. When determining the number of rows of cells in each layer of cell groups, illustratively, at least one layer of cell groups can include one row of cells, two rows of cells, three rows of cells, four rows of cells, or more rows of cells. Each row of cells can serve as a sub-cell group 10. That is, the multiple cells in each layer of cell groups can be arranged in a single row, two rows, three rows, etc. When at least two rows of cells are arranged in each layer of cell groups, the arrangement density of the cells can be increased, the space inside the battery pack can be fully utilized, and the energy density of the battery pack can be thereby improved. The stacking direction of the at least two layers of cell groups is the third direction, which is substantially perpendicular to both the first direction and the second direction, that is, the first direction, the second direction, and the third direction are mutually perpendicular. For example, when the battery cell is a long battery cell with a relatively thin thickness, the third direction may be the width direction of the battery cell. It should be understood that the above only shows one stacking direction of different layers of battery cell groups.

[0068] Furthermore, in at least two layers of cell groups, at least some of the cells can be initially placed within a module housing to form a battery module. Specifically, a battery module can be assembled by placing some of the cells within a module housing, or all of the cells can be assembled within a module housing. In some embodiments, the topmost cell group of the at least two layers of cell groups is placed within at least one module housing, and each module housing contains at least one sub-cell group, with a row of cells contained within a module housing.

[0069] Optionally, at least the upper cell group is a battery module. Exemplarily, no matter whether the topmost cell group contains one sub-cell group or multiple sub-cell groups, all the cells of the topmost cell group can be arranged in a module shell to assemble into a battery module. That is, in the cells of the battery pack, some sub-cell groups 10 can be directly arranged in the battery pack by directly arranging individual cells one by one, or a sub-cell group 10 including multiple cells can be first integrated into a battery module, and then a battery module can be arranged as a row of cells in the cell pack. Referring to Figure 1, exemplarily, each sub-cell group 10 in the topmost cell group of at least two layers of cell groups can be assembled into a battery module, and the battery module can be assembled into the battery pack by hoisting. The ease of assembly of the battery module is utilized to increase assemblability and simplify the overall assembly difficulty of the battery pack. At this time, all sub-cell groups in the bottom layer of at least two layers of cell groups can be assembled into CTP. It should be explained that CTP is a module-free arrangement method, that is, all cells in the bottom layer of cell groups can be directly arranged in the battery pack to improve the cell arrangement density; of course, the bottom layer of cell groups can also adopt the same module arrangement as the top layer, or other cell arrangement forms, which are not limited here. In addition, when selecting which sub-cell group to use as the battery module, it is not limited to the method of using all sub-cell groups 10 in the top layer as battery modules shown above. In addition, other settings can also be used.

[0070] When determining the number of layers of battery cells in a battery pack, the number of layers of battery cell groups in the battery pack may be at least two layers. Specifically, the number of layers of battery cells in a battery pack may be two layers, three layers, four layers or more layers. The arrangement of at least two layers of battery cells in a battery pack can make full use of the space of the battery pack and improve the energy density of the battery pack. When determining the number of sub-battery cell groups in each layer of battery cell groups, illustratively, each layer of battery cells may include two sub-battery cell groups 10, three sub-battery cell groups 10, four sub-battery cell groups 10 or more sub-battery cell groups 10. Arranging at least two sub-battery cell groups 10 in each layer of battery cell groups can improve the arrangement density of the battery cells, make full use of the space inside the battery pack, and thereby improve the energy density of the battery pack. The stacking direction of at least two layers of battery cell groups is a third direction, that is, the stacking direction of at least two layers of battery cell groups is different from the arrangement direction of the multiple battery cells in each sub-battery cell group (that is, the second direction) and the first direction. Specifically, the first direction, the second direction and the third direction are perpendicular to each other. For example, when the battery cell is a long battery cell, the third direction may be the width direction of the battery cell. It should be understood that the above only shows one stacking direction of different layers of battery cells.

[0071] In addition, the battery pack may further include a box body, in which at least two layers of battery cell groups are arranged. When setting the box body, a variety of settings can be adopted. Exemplarily, the box body may include a tray (not shown) for supporting at least two layers of battery cell groups, and may also include a cover plate covering the at least two layers of battery cell groups, and may also include side beams connected between the cover plate and the tray. The side beams may be provided on the tray, and the specific setting method may be provided on the tray by methods such as, but not limited to, welding, screw connection, clamping, integral molding, etc.

[0072] In some embodiments, the battery pack comprises at least two layers of cell groups, and the housing includes a receiving cavity and a distribution cavity. The distribution cavity is located on one side of the receiving cavity, and at least two layers of cells are disposed within the receiving cavity. At least two layers of cells may correspond to the same distribution cavity. The distribution cavity may contain multiple modules, including a battery energy distribution unit and modules such as a battery information collector. Optionally, at least two layers of cells may correspond to the same distribution cavity and may share multiple modules within the distribution cavity.

[0073] In other embodiments, the box includes at least two layers of accommodating cavities and at least two distribution cavities; the at least two distribution cavities correspond one-to-one to the at least two layers of accommodating cavities, and each distribution cavity is arranged in the corresponding accommodating cavity; and the at least two layers of battery cell groups correspond one-to-one to the at least two layers of accommodating cavities, and each layer of battery cell groups is arranged in the corresponding layer of accommodating cavities. For example, the box has a first end and a second end relative to each other along the second direction, that is, the multiple battery cells in each row of battery cells are arranged in sequence from the first end of the box to the second end of the box. The distribution cavity can be set at the first end of the box so that the distribution cavity is directly opposite to the non-electrode end of each row of battery cells, thereby reducing the risk of battery cell gas being directly ejected into the distribution cavity during thermal runaway, such as but not limited to the battery energy distribution unit 51 and other modules. At the same time, it is also convenient to electrically connect the modules in the distribution cavity 10 and each row of battery cells, reducing the wiring length in the battery pack, thereby reducing the risk of high-voltage circuit breakdown.

[0074] Multiple modules can be installed within the power distribution cavity. The power distribution cavity can include a battery energy distribution unit and other modules, such as a battery information collector. When electrically connecting the battery energy distribution unit to the two layers of cells, the battery energy distribution unit can be electrically connected to at least one positive electrode and negative electrode in the two layers of cells. For example, the battery energy distribution unit can provide only one positive electrode interface and one negative electrode interface, with the positive electrode interface electrically connected to at least one positive electrode in the two layers of cells. The specific electrical connection method can include, but is not limited to, busbars, flexible conductors, and the like. Of course, the methods for electrically connecting the battery energy distribution unit to the two layers of cells are not limited to those shown above; other methods can also be used. For example, all cells in a cell group within a two-layer cell group can be connected in series, with each cell group electrically connected to the battery energy distribution unit via a second busbar. Specifically, multiple cells in the upper cell group can be connected in series, and multiple cells in the lower cell group can be connected in series, and then connected in series via the second busbar within the power distribution cavity. This allows for a single power distribution cavity.

[0075] The second busbar can be used to electrically connect two adjacent sub-cell groups 10 in the same layer of cell groups. Even different sub-cell groups 10 in the same layer of cell groups 10 can be electrically connected through the second busbar, thereby reducing the number of interfaces between the battery energy distribution unit and at least the sub-cell group 10, and reducing the number of wiring between the battery energy distribution unit and the two layers of cell groups, thereby reducing the risk of high-voltage breakdown. The material of the second busbar can be, for example, but not limited to, a conductive copper busbar. The second busbar can be set at the first end or the second end of the box to prevent the second busbar from interfering with the arrangement of at least two layers of cell groups.

[0076] An electric energy output interface can be provided in the power distribution cavity, and the electric energy output interface can be directly electrically connected to the battery energy distribution unit in the power distribution cavity to output electric energy to the outside. The electric energy output interface can be assembled in the power distribution cavity in the form of a plug-in connector. Of course, an electric energy output interface can also be provided at the second end of the box, that is, two electric energy output interfaces are provided in the battery pack. The electric energy output interface can be assembled at the second end of the box in the form of a plug-in connector. When realizing the electrical connection between the electric energy output interface at the second end of the box and the battery energy distribution unit, a variety of methods can be used. For example, the electric energy output interface can be electrically connected to the battery energy distribution unit through a first busbar, and the first busbar can specifically be, for example, but not limited to, a conductive copper busbar. The first busbar can also be located above the two layers of battery cells to prevent the first busbar from affecting the arrangement structure of the battery cells. As described above, the first busbar and the upper battery cell group are separated by a first insulating film, thereby preventing faults such as open circuit and short circuit from occurring between the first busbar and the upper battery cell group.

[0077] The following describes some details of the exhaust structure 3 with reference to Figures 1 to 9. The exhaust structure 3 is located between two adjacent sub-cell groups and is also located within the battery pack. It is used to discharge gases generated by the cells to the outside of the battery pack. The exhaust structure 3 can be configured in a variety of ways. For example, the following describes one configuration method.

[0078] First of all, it should be noted that the exhaust structure 3 described below can be applied to a battery pack comprising at least one layer of battery cell group 10, that is, at least one layer of battery cell group 10 is provided in the box of the battery pack. Exemplarily, the number of layers of battery cells in the battery pack can be one layer, or two or more layers. At least one layer of battery cell group 10 contains at least two sub-battery cell groups 10. In some embodiments, each layer of battery cells contains at least two sub-battery cell groups, and the number of sub-battery cell groups included in each layer of battery cell group can be two, three, four, etc. Each sub-battery cell group 10 can contain multiple battery cells. Electrodes are respectively provided at opposite ends of each battery cell along the first direction, and multiple battery cells in the same sub-battery cell group 10 are arranged in sequence along the second direction. The above description can be adopted for the setting method of the first direction, the second direction and the third direction, which will not be repeated here.

[0079] It is worth mentioning that, in the battery cells of the same layer, the stacking direction of the battery cells is the same as the extending direction of the exhaust structure 3. There is a gap between two adjacent rows of battery cells, and the exhaust structure 3 is arranged in the gap.

[0080] Referring to Figure 1 , the exhaust structure 3 includes an isolation member 30 . Between any adjacent sub-cell groups 10 in the same layer of cell group 10 , an isolation member 30 is provided. Specifically, the isolation member 30 is provided between adjacent sub-cell groups 10 in the same layer to separate cells in the same layer but belonging to different sub-cell groups into two independent spaces. This prevents gases generated by cells in different rows from being sprayed into adjacent rows and damaging them. It can be seen that the number of isolation members 30 is specifically related to the number of cell layers and the number of cell rows contained in each layer.

[0081] Optionally, the isolation member 30 may be a composite material structure formed by pultrusion. The pultruded composite material has high temperature resistance and insulation performance at high temperatures, which is better than that of metal materials and plastic materials.

[0082] In some embodiments, the exhaust structure 3 includes a plurality of exhaust channels 71, each of which has a first opening and a second opening at its two ends (i.e., the two ends corresponding to the isolation member 30), and the two ends are also the two ends along the second direction (i.e., the arrangement direction of each row of battery cells). The airflow direction of the exhaust channel 71 is substantially parallel to the second direction, so as to be opposite to all electrode positions of all battery cells in the corresponding sub-battery cell group 10, so that the gas ejected from the electrode on one side of the same row of battery cells is discharged into the exhaust channel 71. Optionally, each exhaust channel 71 has an air inlet, which faces the battery cell adjacent to each exhaust channel 71, i.e., the electrode of the adjacent battery cell, so that the gas generated by each battery cell flows into the exhaust channel 71 through the air inlet. The number of air inlets can be multiple or one, and one air inlet can correspond to a row of battery cells, or multiple air inlets can be provided on the exhaust channel 71, each air inlet corresponding to one battery cell.

[0083] In some embodiments, the isolation member 30 includes a first side and a second side opposite to the first side, wherein at least one exhaust channel 71 among the multiple exhaust channels 71 is arranged on the first side, and at least one exhaust channel 71 among the multiple exhaust channels 71 is arranged on the second side, wherein the exhaust channel 71 located on the first side is used to collect thermal runaway gases (such as high-temperature gases) discharged from the adjacent battery cells, and the exhaust channel 71 located on the second side is used to collect thermal runaway gases (such as high-temperature gases) discharged from the adjacent battery cells.

[0084] In some embodiments, as shown in Figures 1 to 6, the exhaust structure 3 further includes a barrier member 72, which is disposed at both ends of the isolation member 30 and connected to the isolation member 30, and is used to cover the first opening and the second opening. The barrier member 72 and the isolation member 30 cooperate to form an effective exhaust channel 71. Furthermore, the barrier member 72, the isolation member 30, and the adjacent sub-cell group 10 are used to define the exhaust channel, thereby achieving directional exhaust of thermal runaway gases from the corresponding battery cells. In some embodiments, the surface of the barrier member 72 connected to the isolation member 30 can also partially conform to the outer walls of the battery cells on both sides, thereby more tightly sealing the gaps between adjacent sub-cell groups.

[0085] Optionally, the barrier member 72 may be any suitable member. For example, the barrier member 72 includes a baffle 721 . The baffle 721 may be a flat plate structure or other suitable structure. It may be formed by injection molding or may be made of other suitable plastic materials.

[0086] Furthermore, in order to improve the high-temperature resistance of the barrier member 72, the barrier member 72 disclosed herein also includes a heat-insulating layer (not shown), which is arranged on the side of the baffle 721 facing the exhaust channel 71. The heat-insulating layer can prevent the baffle 721 from directly contacting the high-temperature gas and having a negative impact on it, thereby improving the high-temperature resistance of the barrier member 72.

[0087] Optionally, the heat insulating layer may be made of any suitable high temperature resistant material, for example, the isolation layer may be made of mica material, which may be provided on the baffle 721 by gluing or other suitable means.

[0088] The barrier member 72 and the isolation member 30 may also be connected by any suitable connection method, such as one or more of snap connection, bonding, screw connection, etc.

[0089] In some embodiments, as shown in FIG6 , the baffle 721 is further provided with a first snap-fit ​​portion 722, and the isolation member 30 is provided with a second snap-fit ​​portion 301 that cooperates with the first snap-fit ​​portion 722. The baffle 721 and the isolation member 30 are snap-fitted together by the first snap-fit ​​portion 722 and the second snap-fit ​​portion 301. The second snap-fit ​​portion 301 can be a flange or other suitable structure disposed within the space enclosed by the isolation member 30. One end of the first snap-fit ​​portion 722 is connected to the side of the baffle 721 facing the isolation member 30, and the other end of the first snap-fit ​​portion 722 has a protrusion that snaps together with the second snap-fit ​​portion 301. The snap-fit ​​connection between the first snap-fit ​​portion 722 and the second snap-fit ​​portion 301 not only serves as a connection, but also serves as a positioning function, thereby locating the installation position of the barrier structure on the isolation member 30.

[0090] In other embodiments, in order to improve the reliability and airtightness of the connection, the barrier member 72 is adhered to the isolation member 30 by adhesive 723. The adhesive 723 can be structural adhesive or foam adhesive, or other suitable adhesive 723. In addition to bonding the barrier member 72 to the isolation member 30, the adhesive 723 can also serve as a seal.

[0091] The barrier member 72 and the isolation member 30 can be fixed by snapping and bonding, so that the barrier member 72 can be more firmly arranged on the isolation member 30, thereby improving the reliability and airtightness of the connection.

[0092] In some embodiments, in order to ensure accurate alignment of the barrier member 72 and the isolation member 30 during assembly, a limiting portion is further provided on the baffle 721, and a matching portion that cooperates with the limiting portion is provided on the isolation member 30. Optionally, one of the limiting portion and the matching portion can be a protruding structure, and the other can be a groove structure. The protruding structure can be provided in the groove structure to achieve a limiting effect, wherein the limiting portion can be selectively provided.

[0093] In one embodiment, the two exhaust channels 71 between two adjacent sub-battery cell groups 10 can be stacked along a third direction. As mentioned above, the third direction can be perpendicular to both the first direction and the second direction, which can reduce the width space of the battery pack occupied by the two exhaust channels 71 and improve space utilization. Of course, the two exhaust channels 71 can also be arranged side by side along the first direction. In addition, the two exhaust channels 71 between two adjacent sub-battery cell groups 10 can both be arranged on an isolation member 30 that is also located between the two adjacent sub-battery cell groups 10 to facilitate fixing the exhaust channels 71. In a more optimal manner, the two exhaust channels 71 and the isolation member 30 can be obtained by integrated processing to improve structural integration and facilitate assembly.

[0094] In some embodiments, the isolation member 30 may include a base, a first extension portion 731 and a second extension portion 732 extending from the base toward the battery cell on the first side, and a third extension portion 733 and a fourth extension portion extending from the base toward the battery cell on the second side, wherein the first extension portion 731 and the second extension portion 732 are arranged at intervals, and the first extension portion 731, the second extension portion 732 and the barrier member 72 are used to define a first exhaust channel, wherein the first extension portion 731 can also abut its adjacent battery cell, for example, abut the end surface or top surface of the adjacent battery cell, and the third extension portion 733 and the fourth extension portion are arranged at intervals, and the third extension portion 733, the fourth extension portion and the barrier member 72 are used to define a second exhaust channel, wherein the third extension portion 733 can also abut its adjacent battery cell, for example, abut the end surface or top surface of the adjacent battery cell. The isolation member 30 also includes a top plate, and the base may include a first side plate 311, a second side plate 312 spaced apart and parallel to the first side plate 311, and a bottom plate 313, the top plate connecting the top of the first side plate 311 and the top of the second side plate 312, the bottom plate 313 connecting the bottom of the first side plate 311 and the bottom of the second side plate 312, the first side plate 311, the second side plate 312, the top plate and the bottom plate 313 form a cavity, the part of the top plate extending outside the first side plate 311 serves as the first extension portion 731, and the part of the top plate extending outside the second side plate 312 serves as the third extension portion 733.

[0095] For example, to connect the exhaust structure to the pallet 110, a first bolt hole is provided on the bottom plate 313 for securing the exhaust structure to the pallet 110, for example, to the middle beam 111 of the pallet 110. In some embodiments, the base body has a cavity therein (e.g., the cavity above the bottom plate 313). By providing a cavity within the base body, the weight of the exhaust structure can be reduced, and sufficient installation space is left for the bolts inserted through the first bolt holes, thereby facilitating assembly. Furthermore, the exhaust structure 3 also includes at least two exhaust holes 73, which are disposed in the isolation member 30 and are located above the exhaust channel 71 and communicate with the exhaust channel 71. Each exhaust channel 71 corresponds to at least one exhaust hole 73. For example, if the first extension portion 731 is located above the second extension portion 732, the exhaust hole 73 is disposed in the first extension portion 731 and passes through the first extension portion 731 and communicates with the exhaust channel 71. The number of exhaust holes 73 can be one or more. When there are multiple exhaust holes 73, the multiple exhaust holes 73 can be arranged at intervals along the second direction, such as at equal intervals or at unequal intervals. In some embodiments, the third extension portion 733 is disposed above the fourth extension portion, and an exhaust hole 73 is also disposed in the third extension portion 733, which communicates with the exhaust channel 71 below the third extension portion 733.

[0096] Moreover, in some embodiments, an exhaust port is further provided on the battery pack case, and each exhaust channel 71 can be connected to the exhaust port on the case through the exhaust hole 73, so that the gas exhausted in the exhaust channel 71 can be discharged out of the case. By providing an isolation member 30 between two adjacent sub-cell groups 10 on the same layer, the two adjacent sub-cell groups 10 are separated; an exhaust channel 71 is provided at both ends of each sub-cell group 10 opposite to each other along the first direction, and each exhaust channel 71 is connected to the exhaust port on the case, so that the gas generated by the battery cell can be directly discharged into the exhaust channel 71 and discharged through the exhaust hole 73 corresponding to the exhaust channel 71. In addition, the isolation member 30 is used to separate the two adjacent sub-cell groups 10, which can prevent the gas exhausted from the battery cell from being sprayed onto the adjacent sub-cell groups 10 in opposite positions, thereby avoiding the gas exhausted from each sub-cell group 10 from damaging other battery cells and reducing the risk of thermal runaway.

[0097] Referring to Figure 1, when the number of battery cells is at least two layers, at least two layers of battery cell groups can be stacked along the third direction. The specific stacking method is described above and will not be repeated here. It should be noted that when the number of battery cells is at least two layers, the above-mentioned isolation member 30 and exhaust channel 71 can be provided in each layer of the at least two layers of battery cell groups. That is, an isolation member 30 is provided in each layer of battery cell groups to separate the two adjacent sub-battery cell groups 10 in the same layer to prevent the gases generated by adjacent sub-battery cell groups 10 from spraying against each other; at the same time, it is also convenient to discharge the gases generated by each layer of battery cells through the exhaust channel 71 provided in the layer of battery cells to prevent the gases generated by different layers of battery cells from interfering with each other. In some embodiments, when the number of battery cells is at least two layers, the above-mentioned exhaust structure 3 can be provided between the two adjacent sub-battery cell groups 10 located on the top layer.

[0098] In some embodiments, a cold plate can be provided between any two adjacent layers of battery cells in at least two layers of battery cells to improve the heat dissipation efficiency and effect of the cold plate on the battery cells. Different layers of battery cells are separated by a cold plate so that the battery cells are arranged in a similar field shape. The cold plate can specifically be a direct cold plate or a water-cooled plate. By adopting the above-mentioned method, not only can the heat radiation area between the cold plate and the battery cells be increased and the cooling and heat dissipation effect be improved, but also the cold plate is arranged between different layers of battery cells to effectively separate the layers of battery cells, prevent mutual interference between different layers of battery cells, and alleviate the problem of thermal runaway high voltage. That is, the cold plate is a complete structure that can completely cover the surface of all sub-battery cell groups 10 in the same layer of battery cell group. Two adjacent layers of battery cells are separated by a cold plate to prevent mutual interference of exhaust gases between different layers of battery cells.

[0099] In some embodiments, as shown in Figures 3A to 3C , the housing includes a tray 110 for supporting at least one layer of battery cell groups. The exhaust structure 3 is connected to the tray 110, thereby firmly securing the exhaust structure 3 between the battery cells. The connection between the exhaust structure 3 and the tray 110 can be achieved by any suitable means. For example, a cold plate is provided below at least one layer of battery cells, the exhaust structure 3 is located above the intermediate beam 111, and the exhaust structure 3 and the tray 110 are connected by a connector 112 that also extends through the cold plate. Specifically, for example, the battery box further includes an intermediate beam 111, which is connected to the tray 110, for example, the intermediate beam 111 is integrally formed with the tray 110, and the bottom end of the exhaust structure 3 is passed through the cold plate and connected to the intermediate beam 111, thereby being fixed to the tray 110. In some specific embodiments, the connecting member 112 can also be a protrusion, and one of the exhaust structure 3 and the intermediate beam 111 is provided with the protrusion, and the other is provided with a groove that matches the protrusion. The protrusion can be passed through the cold plate and at least partially provided in the groove, thereby realizing the exhaust structure 3 is connected to the middle beam 111, that is, the connection with the tray 110 is achieved. Optionally, the protrusion and the groove can be interference fit to make the connection more secure. Alternatively, in other embodiments, the exhaust structure 3 can also be connected to the middle beam 111 by fasteners such as bolts. For example, a first bolt hole is provided at the bottom of the isolation member 30 of the exhaust structure 3 (such as the bottom plate 313), and a second bolt hole is provided at the top of the middle beam 111. The exhaust structure 3 and the middle beam 111 are connected by the first bolt hole, the second bolt hole and the bolt.

[0100] The middle beam 111 can be arranged between the sub-battery cell groups in the lower layer of the exhaust structure 3. The middle beam 111 can have at least two sub-chambers inside. Air inlet holes are provided on the two side walls of the middle beam 111 adjacent to the battery cells. The gas discharged from the battery cells can enter one or more sub-chambers through the air inlet holes. For example, the gas discharged from the battery cells on both sides of the middle beam 111 enters one sub-chamber, or enters different sub-chambers respectively. These sub-cavities can serve as exhaust channels to guide the gas to the side beams on both sides, and then guide the gas out through the side beams. Optionally, the exhaust structure 3 is independently provided with the middle beam 111, and the middle beam 111 can be integrally formed with the tray 110, thereby improving the modality of the entire battery pack. At the same time, an exhaust port and an exhaust channel are also provided in the middle beam 111. The uppermost sub-chamber of the middle beam 111 can be isolated from the sub-chamber below it, and the second threaded hole provided on the middle beam 111 is connected to the sub-chamber located at the uppermost layer. The sub-chambers are isolated from each other, which can prevent gas leakage into other sub-spaces serving as exhaust channels. The exhaust structure 3 disclosed in the present invention can prevent the gas generated by the battery cells from spraying against each other, and also serves as an exhaust channel.

[0101] It is worth mentioning that when the battery pack includes at least two layers of battery cells, except for the battery cells in the bottom layer, exhaust structures 3 can be provided between adjacent sub-battery cell groups in each layer of battery cell groups located above the bottom layer of battery cells.

[0102] In some embodiments, as shown in Figures 7, 8, and 9, there is a gap between the top surface of the exhaust structure 3 and the cover of the box. For example, the isolation member 30 of the exhaust structure 3 includes a base, a first extension portion 731 extending from the base toward the battery cell on the first side, and a third extension portion 733 extending from the base toward the battery cell on the second side. In the height direction of the accommodating cavity of the box (i.e., the third direction), the top surface of the base is higher than the first extension portion 731 and the third extension portion 733, the top surface of the base abuts the cover of the box, and the first extension portion 731 and the third extension portion 733 are relatively close to each other. There is a gap between 733 and the cover of the box. The height direction of the housing cavity of the box is perpendicular to the first direction and the second direction. The above gap serves as an exhaust channel. The gas discharged from the exhaust hole of the exhaust structure 3 enters the distribution cavity through this gap. The distribution cavity is provided with a first exhaust guide plate. The gas entering the distribution cavity is guided to the two ends of the distribution cavity through the exhaust guide plate. The distribution cavity is also provided with a second exhaust guide plate 80. For example, a second exhaust guide plate 80 is provided at each end of the distribution cavity. The gas is guided to the corresponding exhaust port on the box through the second exhaust guide plate 80. The exhaust port can be set at any position of the box, or one or more exhaust ports can be provided on the box. For example, an explosion-proof valve can also be provided at the exhaust port to facilitate the pressure relief of gas generated in the battery pack and reduce the possibility of battery pack explosion. When an exhaust valve is provided on the box, the gas is guided to the corresponding exhaust valve on the box through the second exhaust guide plate 80. In other embodiments, there is a gap between the top surface of the exhaust structure 3 and the cover plate of the box body. The gap serves as an exhaust channel. The gas discharged from the exhaust hole of the exhaust structure 3 is guided to the side beam through the gap and then discharged through the side beam.

[0103] Since the barrier member 72 seals the first opening and the second opening of the exhaust channel in the direction of the battery cell arrangement, it can prevent high-temperature gas from being discharged into the accommodating cavity of the box body, so that the high-temperature gas can only be discharged from the exhaust hole into the gap between the top surface of the exhaust structure 3 and the cover plate of the box body, thereby changing the exhaust direction and guiding the high-temperature gas to a predetermined position, such as the distribution cavity.

[0104] Exemplarily, the first exhaust guide plate can be composed of a side beam connected to the cover plate, and the side beam extends downward from the cover plate for a part of the length, or the first exhaust guide plate can also be perpendicular to the length extension direction of the exhaust structure 3, for example, the first exhaust guide plate extends for a part of the length along the first direction.

[0105] In some embodiments, the second exhaust guide plate 80 can be covered at the exhaust port or the exhaust valve to prevent the gas from the exhaust port or the exhaust valve from entering other positions of the battery pack, so that the gas entering the distribution cavity can be discharged from the exhaust port or the exhaust valve more quickly. The second exhaust guide plate 80 has an air inlet 801, and the gas enters the space between the second exhaust guide plate 80 and the box body through the air inlet 801, and is then discharged from the exhaust port or the exhaust valve.

[0106] In addition, the present disclosure provides a vehicle 1000, as shown in Figure 10 . Vehicle 1000 includes a vehicle body and any of the aforementioned battery packs disposed on the vehicle body. Vehicle 1000 may be, for example, but not limited to, a passenger car, a truck, or a construction vehicle. The vehicle body includes a frame, wheels, a gearbox, a steering wheel, and other structures, and any of the aforementioned battery packs is disposed on the vehicle body.

[0107] The present invention has been described through the above-described embodiments. However, it should be understood that the above-described embodiments are for illustrative and illustrative purposes only and are not intended to limit the present invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments and that various variations and modifications may be made based on the teachings of the present invention, all of which fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An exhaust structure, applied to a battery pack, the battery pack comprising at least one layer of battery cell groups, each layer of battery cell groups comprising at least two sub-battery cell groups (10), the sub-battery cell groups (10) comprising a plurality of battery cells, the plurality of battery cells of the sub-battery cell groups all extending along a first direction, the plurality of battery cells of the sub-battery cell groups (10) being arranged along a second direction, characterized in that: The exhaust structure is arranged between two adjacent sub-cell groups on the same layer, and includes: An isolation member (30) configured to separate two adjacent sub-cell groups (10); a barrier member (72) disposed at both ends of the isolation member (30) along the second direction and connected to the isolation member (30), wherein the isolation member (30) and the barrier member (72) are used to define a plurality of exhaust channels (71), each of the exhaust channels (71) having a first opening and a second opening opposite to each other at both ends of the isolation member (30), the barrier member (30) sealing the first opening and the second opening, and the sub-cell groups (10) on both sides of the isolation member (30) respectively corresponding to at least one exhaust channel (71); At least two exhaust holes (73) are arranged in the isolation component (30), are located above the exhaust channel (71) and are connected to the corresponding exhaust channel (71), wherein each exhaust channel (71) corresponds to at least one exhaust hole (73).

2. The exhaust structure according to claim 1, characterized in that: The barrier component (72) comprises a baffle (721) and a heat insulation layer, wherein the heat insulation layer is arranged on a side of the baffle (721) facing the exhaust passage (71).

3. The exhaust structure according to claim 2, characterized in that: The heat insulation layer is made of mica material.

4. The exhaust structure according to claim 2 or 3, characterized in that: The baffle plate (721) is also provided with a first snap-fit ​​portion (722), and the isolation member (30) is provided with a second snap-fit ​​portion (301) that matches the first snap-fit ​​portion (722), and the baffle plate (721) and the isolation member (30) are snap-fitted and connected via the first snap-fit ​​portion (722) and the second snap-fit ​​portion (301).

5. The exhaust structure according to any one of claims 2 to 4, characterized in that: The baffle (721) is also provided with a limiting portion, and the isolation component (30) is provided with a matching portion that matches the limiting portion.

6. The exhaust structure according to any one of claims 1 to 5, characterized in that: The barrier member (72) is adhered to the isolation member (30) by means of adhesive (723).

7. The exhaust structure according to any one of claims 1 to 6, characterized in that: Each of the exhaust channels (71) has an air inlet (801), and the air inlet (801) faces the battery cell adjacent to each of the exhaust channels (71).

8. The exhaust structure according to any one of claims 1 to 7, characterized in that: The isolation member (30) includes a first side and a second side opposite to the first side, wherein at least one exhaust channel (71) among the plurality of exhaust channels (71) is arranged on the first side, and at least one exhaust channel (71) among the plurality of exhaust channels (71) is arranged on the second side.

9. The exhaust structure according to claim 8, characterized in that: The isolation member (30) comprises a substrate, a first extension portion (731) and a second extension portion (732) extending from the substrate toward the battery cell on the first side, and a third extension portion (733) and a fourth extension portion extending from the substrate toward the battery cell on the second side, wherein the first extension portion (731) and the second extension portion (732) are arranged at intervals, the first extension portion (731), the second extension portion (732) and the isolation member (72) are used to define a first exhaust channel, the third extension portion (733) and the fourth extension portion are arranged at intervals, and the third extension portion (733), the fourth extension portion and the isolation member (72) are used to define a second exhaust channel.

10. The exhaust structure according to claim 9, characterized in that: The isolation member (30) further includes a top plate, and the base may include a first side plate (311), a second side plate (312) spaced apart from and parallel to the first side plate (311), and a bottom plate (313), the top plate connecting the top of the first side plate (311) and the top of the second side plate (312), the bottom plate (313) connecting the bottom of the first side plate (311) and the bottom of the second side plate (312), the portion of the top plate extending outside the first side plate (311) serving as the first extension portion (731), and the portion of the top plate extending outside the second side plate (312) serving as the third extension portion (732).

11. The exhaust structure according to claim 10, characterized in that: A first bolt hole is provided on the bottom plate (313).

12. A battery pack, characterized in that: include: Box; At least one layer of battery cell groups, the at least one layer of battery cell groups being arranged in the box; wherein each layer of the battery cell groups comprises at least two sub-battery cell groups (10), the sub-battery cell groups (10) comprising a plurality of battery cells, the plurality of battery cells of the sub-battery cell groups (10) all extending along a first direction, and the plurality of battery cells of the sub-battery cell groups (10) being arranged along a second direction; At least one exhaust structure according to any one of claims 1 to 11, each of the exhaust structures is arranged between two adjacent sub-cell groups (10) on the same layer.

13. The battery pack according to claim 12, characterized in that: The box body comprises a tray (110) for supporting at least one layer of battery cell groups, and the exhaust structure is connected to the tray (110).

14. The battery pack according to claim 13, wherein: A cold plate is arranged below at least one layer of the battery cell group, and the exhaust structure and the tray (110) are connected via a connector (112), and the connector (112) also penetrates the cold plate.

15. The battery pack according to claim 14, characterized in that: The battery pack comprises at least two layers of battery cell groups, the cold plate is arranged between any two adjacent layers of battery cell groups, a middle beam (111) is arranged on the tray (110), the exhaust structure is located above the middle beam (111), and the exhaust structure and the middle beam (111) of the tray (110) are connected via the connecting member (112).

16. The battery pack according to claim 15, characterized in that: The middle beam (111) is arranged between two adjacent sub-cell groups (10) below the exhaust structure, and at least two sub-spaces are provided in the middle beam (111), and adjacent sub-spaces are isolated from each other, wherein a second bolt hole is provided at the top of the middle beam (111), and the second bolt hole is connected to the sub-space located at the top layer, and the exhaust structure is connected to the middle beam (111) of the tray (110) through the first bolt hole on the exhaust structure, the second bolt hole and the connecting member (112).

17. The battery pack according to any one of claims 14 to 16, characterized in that: The connecting member (112) comprises a protrusion, one of the middle beam (111) and the exhaust structure is provided with the protrusion, and the other is provided with a groove matching the protrusion, and the protrusion is arranged in the groove.

18. The battery pack according to any one of claims 12 to 17, characterized in that: The battery pack comprises: At least two layers of battery pack; The box body includes a accommodating cavity and a distribution cavity, the distribution cavity is located on one side of the accommodating cavity, at least two layers of the battery cell groups are arranged in the accommodating cavity, and there is a gap between the top surface of the exhaust structure and the cover plate of the box body, and the gas exhausted from the exhaust hole of the exhaust structure enters the distribution cavity through the gap.

19. The battery pack according to any one of claims 12 to 18, characterized in that: The battery pack comprises: at least two layers of battery cell groups; The box body includes at least two layers of accommodating cavities and at least two distribution cavities; the at least two distribution cavities correspond to the at least two layers of accommodating cavities one by one, each of the distribution cavities is arranged in the corresponding accommodating cavity, and the at least two layers of battery cell groups correspond to the at least two layers of accommodating cavities one by one, and each layer of battery cell groups is arranged A corresponding layer of the accommodating cavity, wherein: There is a gap between the top surface of the exhaust structure and the cover plate of the box body, and the gas exhausted from the exhaust hole of the exhaust structure enters the power distribution cavity through the gap.

20. The battery pack according to claim 18 or 19, characterized in that: The isolation member (30) comprises a base, a first extension portion (731) extending from the base toward the battery cell on the first side, and a third extension portion (733) extending from the base toward the battery cell on the second side, wherein in the height direction of the accommodating cavity, the top surface of the base is higher than the first extension portion (731) and the third extension portion (733), the top surface of the base abuts against the cover plate, the first extension portion (731) and the third extension portion (733) have the gap with the cover plate of the box, and the height direction of the accommodating cavity is perpendicular to the first direction and the second direction.

21. The battery pack according to claim 18 or 19, characterized in that: A first exhaust guide plate (80) is provided in the power distribution chamber, and the gas entering the power distribution chamber is guided to the two ends of the power distribution chamber via the first exhaust guide plate (80).

22. The battery pack according to claim 18 or 19, characterized in that: An exhaust port or an explosion-proof valve is arranged on the box body, and a second exhaust guide plate is also arranged in the power distribution cavity. The second exhaust guide plate covers the exhaust port or the explosion-proof valve, and the gas is guided to the exhaust port or the explosion-proof valve through the second exhaust guide plate.

23. A vehicle, characterized in that: include: Vehicle body; The battery pack according to any one of claims 12 to 22 is arranged on the vehicle body.

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