Battery module, battery pack, driving equipment and control method of battery pack

Abstract

The invention discloses a battery module, a battery pack, driving equipment and a control method of the battery pack, and relates to the technical field of transportation. The battery module comprises a battery cell, a fireproof plate and a supporting plate which are arranged in sequence, and the supporting plate is provided with a through hole; a penetrating structure is arranged on the plate body section of the fireproof plate and is communicated with the through hole; the projection area of the penetrating structure in the through hole is smaller than that of the through hole. According to the battery module provided by the invention, the through structure with a relatively small projection area can increase the flowing speed of the fluid, so that a small amount of fluid before thermal runaway can be found earlier, countermeasures can be taken earlier, the pressure rise amplitude in the battery module is reduced, and the use safety of the battery module and the corresponding battery pack is improved. Besides, a large amount of high-temperature fluid can pass through the penetrating structure during thermal runaway, and can rapidly break through the solid part, located in the through hole, of the fireproof plate, so that the pressure rise amplitude at the fireproof plate is reduced, and the use safety of the battery module and the corresponding battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of transportation technology, and in particular to a battery module, a battery pack, a driving device, and a control method for the battery pack. Background Art

[0002] With the technological advancement of electric aviation equipment, flying car-like vehicles are increasingly appearing on the market. These vehicles typically require battery packs with higher energy density, which in turn increases the risk of thermal runaway and fire.

[0003] When high-energy-density battery cells experience thermal runaway, the gas production rate is an order of magnitude higher than that of traditional battery cells. The instantaneous high voltage generated by high-energy-density battery cells may make it difficult for the corresponding battery box to quickly release pressure, and may cause the corresponding battery box to be damaged by high-voltage shock. The safety of battery packs needs to be improved. Summary of the Invention

[0004] The main purpose of this application is to propose a battery module to improve the safety of use.

[0005] To achieve the above-mentioned purpose, the battery module proposed in the present application includes a battery cell, a fireproof plate and a support plate arranged in sequence, the support plate is used to be fixedly connected to the battery box to support the battery cell and the fireproof plate, and the support plate is provided with a through hole; the fireproof plate includes a plate body section, and the two sides of the plate body section respectively abut the battery cell and the support plate; a through structure is provided on the plate body section, and the through structure penetrates the thickness direction of the fireproof plate and is connected with the through hole; projected along the axial direction of the through hole, the projected area of ​​the through structure located in the through hole is smaller than the projected area of ​​the through hole.

[0006] Optionally, a plate body recess is provided on the side of the plate body segment facing the battery core, the depth of the plate body recess is less than the thickness of the plate body segment, the penetrating structure is arranged on the bottom wall of the plate body recess, and the penetrating structure penetrates the bottom wall of the plate body recess in the thickness direction.

[0007] Optionally, the battery module further includes an annular pad, and along the axial direction of the annular pad, one side of the annular pad abuts against the plate segment, and the other side of the annular pad abuts against the battery cell.

[0008] Optionally, the annular pad is arranged in the recess of the plate body; the side of the annular pad facing away from the battery cell abuts against the bottom wall of the plate body recess, and / or the end of the battery cell abutting against the annular pad extends into the recess of the plate body.

[0009] Optionally, the penetrating structure includes a penetrating gap, and the extending direction of the penetrating gap is parallel to the board surface of the fireproof board.

[0010] Optionally, the through-hole structure includes at least two through-holes arranged at intervals; and / or, at least part of the through-holes include an arc segment, the diameter of the arc segment is greater than or equal to 5 mm and less than or equal to 50 mm; and / or, the width of the through-hole is less than or equal to 3 mm; and / or, the total extension length of the through-holes covered by each of the battery cells is greater than or equal to 10 mm; and / or, the strength of the fireproof board is less than the strength of the support plate; and / or, the battery module includes a battery tray, and the battery tray includes a shell segment that surrounds a shell accommodating cavity; the battery cell is arranged in the shell accommodating cavity, and the support plate includes the bottom wall of the shell segment.

[0011] The present application also proposes a battery pack, which includes a battery box and the above-mentioned battery module; the box walls of the battery box are enclosed to form a box accommodating cavity, the battery module is at least partially accommodated in the box accommodating cavity, and a box discharge channel is formed between the outer wall of the battery module and the box wall of the battery box.

[0012] Optionally, the battery pack further includes a gas detector and an active exhaust valve that can be opened in a controlled manner; a discharge port is provided on the wall of the battery box, and the discharge port and the through hole are respectively connected to the box body discharge channel; the active exhaust valve is arranged at the discharge port; the gas detector is used to detect gas information in the box body discharge channel, the gas detector is electrically connected to the active exhaust valve, and the active exhaust valve is used to open according to a first preset output signal of the gas detector.

[0013] Optionally, the battery pack further includes a gas driver, which is used to drive the gas in the box exhaust channel to be discharged outward.

[0014] Optionally, a connecting port is provided on the wall of the battery box, and the battery pack includes the gas driver arranged at the connecting port; the gas driver is used to drive the gas in the box body exhaust channel to be discharged outward from the connecting port, or the gas driver is used to drive external gas to flow from the connecting port into the box body exhaust channel so that the gas in the box body exhaust channel is discharged outward from the exhaust port on the wall of the battery box; and / or, a connecting port and an exhaust port are provided on the wall of the battery box, the exhaust port is arranged on one side of the battery box, and the connecting port is arranged on the other opposite side of the battery box; the battery pack at least includes the gas driver arranged at the exhaust port; and / or, the battery pack includes the gas driver arranged in the box body exhaust channel, and the gas driver is used to drive the gas in the box body exhaust channel to be discharged outward from the exhaust port on the wall of the battery box.

[0015] Optionally, the battery pack further includes a gas driver, which is used to drive the gas in the box exhaust channel to be discharged outward; the gas driver is electrically connected to the gas detector, and is used to start according to a second preset output signal of the gas detector.

[0016] Optionally, the gas information in the box exhaust channel includes at least one of gas type, gas component and gas concentration; the gas detector is configured to output different second preset output signals according to different gas information in the box exhaust channel, and the gas driver is configured to adjust the speed of the driving gas, and the gas driver is used to form different driving gas speeds according to different second preset output signals.

[0017] Optionally, the battery pack includes the gas driver having an exhaust port arranged on the wall of the battery box; and / or, the battery pack includes the gas driver having a communication port arranged on the wall of the battery box; the battery pack also includes a door body that can be opened in a controllable manner, the door body cover is arranged on the wall of the battery box, and the door body is used to cover the gas driver; the controllable end of the door body is electrically connected to the gas detector, and the door body is used to open according to the second preset output signal.

[0018] Optionally, the battery module includes a filling body and at least two battery cells arranged side by side, a connecting gap is formed between the battery cells, and at least part of the filling body is filled in the connecting gap of the battery cells; the battery pack also includes a connecting wire, one end of the connecting wire is electrically connected to the gas detector, and the other end of the connecting wire passes through the filling body and extends out of the side of the filling body facing away from the gas detector; and / or, the gas detector is at least partially arranged in the discharge channel of the box body.

[0019] Optionally, a module recess is formed on the bottom wall of the battery module, and the module recess is connected to the box discharge channel; when projected in a direction perpendicular to the bottom wall of the battery module, at least part of the projection of the gas detector is located in the module recess; or, when projected in a direction perpendicular to the bottom wall of the battery module, the projection of the gas detector is arranged outside the module recess, and the ratio of the distance from the projection of the gas detector to the boundary of the module recess to the diameter of the projection envelope circle of the module recess is less than or equal to 3.

[0020] Optionally, the battery module includes a side wall section, and part of the box body discharge channel is formed between the side wall section and the box wall of the battery box, and between the bottom wall of the battery module and the bottom wall of the battery box; part of the opening of the module recess is arranged on the side wall section of the battery module, and the other part of the opening of the module recess is arranged on the bottom wall of the battery module; and / or, projected along the axial direction of the discharge port, at least part of the projection of the discharge port is arranged in the module recess; or, projected along the axial direction of the discharge port, the projection of the discharge port is arranged outside the module recess, and the ratio of the distance from the projection of the discharge port to the boundary of the module recess to the diameter of the projection envelope circle of the discharge port is less than or equal to 3; or, at least part of the discharge port is arranged beside all the battery cells, and the depth of the module recess gradually increases along the direction from the battery cell to the discharge port.

[0021] The present application also proposes a traveling device, which includes a traveling mechanism and the above-mentioned battery pack, wherein the battery pack is used to provide power to the traveling mechanism, and the traveling device includes at least one of a flying car and a land car.

[0022] The present application also proposes a control method for a battery pack, which is applied to the above-mentioned battery pack and includes the following steps:

[0023] If the gas information is within a first preset range, causing the gas detector to output a first preset output signal;

[0024] The active exhaust valve is opened according to the first preset output signal.

[0025] The present application also proposes a control method for a battery pack, which is applied to the above-mentioned battery pack and includes the following steps:

[0026] If the gas information is within a second preset range, causing the gas detector to output a second preset output signal;

[0027] The gas driver is started according to the second preset output signal.

[0028] Optionally, the gas information in the exhaust passage of the box includes at least one of gas type, gas component and gas concentration;

[0029] If the gas information is within a second preset range, the step of causing the gas detector to output a second preset output signal includes: if the gas information is within the second preset range, causing the gas detector to output different second preset output signals according to different gas information;

[0030] The step of starting the gas actuator according to the second preset output signal includes: causing the gas actuator to form different driving gas speeds according to different second preset output signals and preset corresponding relationships.

[0031] The technical solution of the present application is to configure the battery module to include battery cells, fireproof plates and support plates arranged in sequence, the support plate is used to be fixedly connected to the battery box to support the battery cells and the fireproof plates, and the support plate is provided with a through hole; the fireproof plate includes a plate section, and the two sides of the plate section respectively abut the battery cells and the support plate; a through structure is provided on the plate section, and the through structure penetrates the thickness direction of the fireproof plate and is connected to the through hole; when projected along the axial direction of the through hole, the projected area of ​​the through structure located in the through hole is smaller than the projected area of ​​the through hole; when the battery cells of the battery module form a small amount of fluid such as smoke and flame before thermal runaway occurs, the through structure with a relatively small projected area can increase the flow rate of the fluid, which is conducive to the early detection of the small amount of fluid before thermal runaway, and is conducive to the earlier implementation of countermeasures, thereby reducing the pressure increase in the battery module, reducing the risk of damage to the battery module and the corresponding battery box due to high-voltage shock, and improving the safety of the battery module and the corresponding battery pack. In addition, in the event of thermal runaway, a large amount of high-temperature fluid can pass through the penetrating structure and quickly break through the solid part of the fireproof plate located in the through hole, reducing the pressure increase at the fireproof plate and improving the safety of the battery module and the corresponding battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1 This is a front view of an embodiment of the battery pack of the present application.

[0034] Figure 2 This is a three-dimensional schematic diagram of an embodiment of the battery pack of the present application.

[0035] Figure 3 This is an exploded view of an embodiment of the battery pack of the present application.

[0036] Figure 4 This is a connection diagram of the fireproof plate in one embodiment of the battery pack of this application.

[0037] Figure 5 This is a schematic diagram of the connection of some fireproof panels in one embodiment of the battery pack of this application.

[0038] Figure 6 for Figure 1 A partial enlarged view of point A in the middle.

[0039] Figure 7 This is a front view of another embodiment of the battery pack of the present application.

[0040] Figure 8 This is an exploded view of another embodiment of the battery pack of the present application.

[0041] Figure 9 This is a schematic diagram of the steps of an embodiment of a control method for a battery pack of the present application.

[0042] Figure 10 This is a schematic diagram of the steps of another embodiment of the battery pack control method of the present application.

[0043] Description of Figure Numbers:

[0044]

[0045]

[0046] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0048] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0050] With the technological advancement of electric aviation equipment, flying car-like vehicles are increasingly appearing on the market. These vehicles typically require battery packs with higher energy density, which in turn increases the risk of thermal runaway and fire.

[0051] When high-energy-density battery cells experience thermal runaway, the gas production rate is an order of magnitude higher than that of traditional battery cells. The instantaneous high voltage generated by high-energy-density battery cells may make it difficult for the corresponding battery box to quickly release pressure, and may cause the corresponding battery box to be damaged by high-voltage shock. The safety of battery packs needs to be improved.

[0052] Therefore, the present application proposes a battery module to improve the safety of use.

[0053] Reference Figure 1 and Figure 2 In one embodiment of the present application, the battery module 100 can be used in a battery pack. The battery pack can include the battery module 100 and a battery case 200. The battery case 200's walls can enclose a housing cavity 201. The battery module 100 can be at least partially contained within the housing cavity 201, with a housing discharge channel 202 formed between the outer wall of the battery module 100 and the wall of the battery case 200.

[0054] Reference Figure 1In this embodiment, the battery module 100 includes a battery cell 110, a fireproof plate 120 and a support plate 142 arranged in sequence. The support plate 142 is used to be fixedly connected to the battery box 200 to support the battery cell 110 and the fireproof plate 120. Among them, the battery cell 110 can be configured as a cylindrical battery cell, a square shell battery cell or a soft-pack battery cell. A core-shell explosion-proof valve can be set at the end of the battery cell 110, so that when the internal pressure of the battery cell 110 reaches a certain level before the thermal runaway of the battery cell 110, the core-shell explosion-proof valve is opened, so that a small amount of flue gas and other fluids generated can flow out. Of course, the battery cell 110 can also be provided with no core-shell explosion-proof valve. The small amount of flue gas and other fluids generated by the battery cell 110 can flow out after breaking through its own shell.

[0055] The battery module 100 may be configured to include a battery tray 140, and the support plate 142 may include the bottom wall of the battery tray 140, and then be indirectly fixedly connected to the battery box 200 through other parts of the battery tray 140, for example, by welding, overlapping or clamping. Figures 1 to 3 The battery tray 140 includes a shell segment 141 that surrounds the shell accommodating cavity, and the longitudinal cross-section of the shell segment 141 can be U-shaped as a whole. The battery cell 110 can be arranged in the shell accommodating cavity, and the support plate 142 includes the bottom wall of the shell segment 141. In addition, referring to Figure 1 and Figure 3 The upper end of the shell segment 141 may also be provided with a connecting outer edge, which extends in a direction surrounding the shell segment 141; the connecting outer edge may also be connected to the side wall of the battery box 200, for example, by overlapping, fastener connection or welding.

[0056] Of course, the support plate 142 can also be provided separately and then directly fixedly connected to the battery box 200 through the edge; or, the support plate 142 can also be provided separately and then indirectly fixedly connected to the battery box 200 through structures such as support columns. This embodiment does not limit this.

[0057] Among them, for the connection method when the support plate 142 supports the battery cell 110 and the fireproof board 120, an adhesive layer can be provided on the side of the fireproof board 120 facing the support plate 142 (for example, the bottom wall of the shell section 141), and the two sides of the adhesive layer are respectively bonded to the fireproof board 120 and the support plate 142 (for example, the bottom wall of the shell section 141). Among them, the adhesive layer can be made of materials such as adhesive backing. It is understandable that in order to make the through hole 143 on the support plate 142 (for example, the bottom wall of the shell section 141) connected with the through structure on the fireproof board 120, the adhesive layer can be correspondingly provided with a layer through hole or notch or other avoidance structure. At this time, the part of the fireproof board 120 supported by the support plate 142 can be combined with the support plate 142 to improve the ability to withstand impact.

[0058] The support plate 142 is provided with a through hole 143; the fireproof board 120 includes a plate body section, and the two sides of the plate body section respectively abut the battery cell 110 and the support plate 142; the plate body section is provided with a through structure, which penetrates the thickness direction of the fireproof board 120 and is connected to the through hole 143. It can be understood that the battery cell 110, the through structure and the through hole 143 are arranged in a one-to-one correspondence. Among them, the fireproof board can be made of mica board, and the through structure can be set as a gap (for example Figure 4 、 Figure 5 The through-structures 122, notches, holes, or groups of holes in the battery cell 110 can be structures such as through-slits 122, notches, holes, or groups of holes. It is understood that the through-structures corresponding to a battery cell 110 can be a single slit, a single notch, or a single hole, or can be groups of slits, groups of notches, or groups of holes. In addition, when projected along the arrangement of the battery cells 110, the through-structures, and the through-holes 143, the through-structures and through-holes 143 can be completely covered by the battery cells 110, or they can partially extend beyond the coverage of the battery cells 110.

[0059] Projection is made along the axial direction of the through hole 143, for example, along Figure 1 Projecting in the up and down directions, the projected area of ​​the through structure located in the through hole 143 is smaller than the projected area of ​​the through hole 143; it can be understood that the overall through area of ​​the through structure is relatively small, and the overall through area of ​​the through hole 143 is relatively large.

[0060] In this embodiment, when the battery cells 110 of the battery module 100 form a small amount of fluid such as smoke and flame before thermal runaway occurs, the through structure with a relatively small projected area can increase the flow rate of the fluid, which is conducive to the early detection of the small amount of fluid before thermal runaway, for example, it is discharged outward through the above-mentioned box discharge channel 202 and other structures and discovered by the user, or detected by the gas sensor and discovered; it is conducive to the early implementation of response measures, reducing the pressure increase in the battery module 100, reducing the risk of the battery module 100 and the corresponding battery box 200 (when the battery module 100 is installed on the battery box 200) being damaged by high-voltage shock, and improving the safety of the battery module 100 and the corresponding battery pack (when the battery module 100 is installed on the battery box 200 to form a battery pack).

[0061] In addition, the material of the fireproof plate 120 generally results in a relatively low structural strength, which can be understood as making the strength of the fireproof plate 120 less than the strength of the support plate 142. For example, if the fireproof plate 120 is made of mica and the support plate 142 is made of steel, the lightness of the mica plate is less than the strength of the steel plate. In the event of thermal runaway, a large amount of high-temperature fluid can pass through the through-structure and quickly break through the solid portion of the fireproof plate 120 located within the through-hole 143 (this portion, due to being located within the through-hole 143, does not receive the physical support of the support plate 142), thereby reducing the pressure increase at the fireproof plate 120 and improving the safety of the battery module 100 and the corresponding battery pack. It can be understood that for the combined thickness between the fireproof plate 120 and the support plate 142 (e.g., the bottom wall of the shell section 141), the cross-sectional area of ​​the channel section formed by the through-structure and the through-hole 143 becomes larger at the through-hole 143, thereby avoiding the formation of a long, narrow channel section and preventing the reduction in the efficiency of the discharge of high-temperature fluids such as smoke. In addition, the through hole 143 having a larger overall penetration area can also reduce the difficulty of processing the support plate 142 at the through hole 143 .

[0062] Further, refer to Figure 4 and Figure 5 A plate recess 121 may be provided on the side of the plate segment facing the battery cell 110. The depth of the plate recess 121 is less than the thickness of the plate segment. This means that at least a portion of the plate recess 121 does not penetrate the plate segment of the fireproof plate 120. The plate segment of the fireproof plate 120 forms a stepped structure by providing the plate recess 121. A penetrating structure is provided on the bottom wall of the plate recess 121 and penetrates the bottom wall of the plate recess 121 in the thickness direction.

[0063] In this embodiment, the plate recess 121 can be used to accommodate the battery cell 110 or the structure connected to the battery cell 110 (such as an adhesive layer, a sealing layer, etc.), thereby improving the degree of sealing through the formed step structure, and improving the concentration of the fluid flowing outward from the penetrating structure, thereby further increasing the speed of the fluid flowing outward, which is conducive to the early detection of a small amount of fluid before thermal runaway; in addition, this structure also reduces the risk of heat from the high-temperature fluid being transferred from the abnormal battery cell 110 to the normal battery cell 110, further improving the safety of the battery module 100 and the corresponding battery pack.

[0064] Further, refer to Figure 4 and Figure 5The battery module 100 also includes an annular gasket 130. Along the axial direction of the annular gasket 130, one side of the annular gasket 130 abuts against the plate segment, and the other side of the annular gasket 130 abuts against the battery cell 110, thereby further improving the sealing degree and increasing the speed of the fluid flowing outward, which is conducive to the early detection of a small amount of fluid before thermal runaway; in addition, this structure further reduces the risk of heat from the high-temperature fluid being transferred from the abnormal battery cell 110 to the normal battery cell 110, further improving the safety of the battery module 100 and the corresponding battery pack.

[0065] Furthermore, the annular pad 130 is arranged in the plate recess 121, and the side of the annular pad 130 facing away from the battery cell 110 abuts against the bottom wall of the plate recess 121, thereby improving the position stability of the annular pad 130 through the plate recess 121, reducing the risk of the annular pad 130 being deformed or displaced by the impact of a large amount of high-temperature fluid, and allowing a large amount of high-temperature fluid to be discharged smoothly.

[0066] Furthermore, the end of the battery cell 110 that abuts the annular gasket 130 can be configured to extend into the plate recess 121, thereby further improving the sealing degree through the stepped structure and increasing the speed of fluid flow outward, which helps to detect small amounts of fluid before thermal runaway earlier. In addition, this structure further reduces the risk of heat from the high-temperature fluid being transferred from an abnormal battery cell 110 to a normal battery cell 110, further improving the safety of the battery module 100 and the corresponding battery pack. The annular gasket 130 can be made of an elastic material, such as rubber, to further improve the sealing degree by being compressed.

[0067] Reference Figure 5 In some embodiments, the through structure includes a through gap 122, and the extension direction of the through gap 122 is parallel to the board surface of the fireproof board 120. The through gap 122 can be set as a straight gap, an arc gap, or a combination of a straight gap and an arc gap. This embodiment does not limit this.

[0068] In this embodiment, the through gap 122 is relatively narrow and long, which can further reduce the risk of high-temperature fluids such as flue gas flowing back to the battery cell 110 from the box exhaust channel 202 and the module exhaust channel, and further reduce the risk of heat of the high-temperature fluid being transferred from the abnormal battery cell 110 to the normal battery cell 110; in addition, the through gap 122 can increase the speed of the fluid flowing outward, which is conducive to the early detection of a small amount of fluid before thermal runaway, and further improves the safety of the battery module 100 and the corresponding battery pack.

[0069] In some embodiments, reference Figure 5The through structure includes at least two through gaps 122 arranged at intervals, thereby improving the unidirectional fluidity of the high-temperature fluid flowing outward from the battery core 110 while improving the flow efficiency of the high-temperature fluid such as flue gas flowing outward from the battery core 110.

[0070] In some embodiments, at least a portion of the through-slits 122 include arcuate segments with a diameter greater than or equal to 5 mm and less than or equal to 50 mm. This improves the unidirectional flow of the high-temperature fluid outward from the battery cell 110 while also enhancing the flow efficiency of the flue gas and other high-temperature fluids outward from the battery cell 110. The diameter of the arcuate segments can be set to greater than or equal to 10 mm and less than or equal to 40 mm to further enhance the unidirectional flow and flow efficiency. Furthermore, for through-slits 122 including arcuate segments, the through-slits 122 can also be configured in shapes such as discontinuous circles or discontinuous ovals.

[0071] In some embodiments, the width of the through-slit 122 is less than or equal to 3 mm, thereby improving the unidirectional flow of the high-temperature fluid from the battery cell 110 while also improving the flow efficiency of the high-temperature fluid, such as flue gas, from the battery cell 110. The width of the through-slit 122 can be set to be greater than or equal to 0.1 mm and less than or equal to 2 mm to further improve the unidirectional flow and flow efficiency.

[0072] In some embodiments, the total extension length of the through gap 122 covered by each battery cell 110 is greater than or equal to 10 mm, thereby improving the unidirectional fluidity of the high-temperature fluid flowing outward from the battery cell 110 while improving the flow efficiency of high-temperature fluids such as flue gas flowing outward from the battery cell 110.

[0073] In addition, refer to Figures 1 to 3 , the present application also proposes a battery pack, which includes the above-mentioned battery box 200 and the above-mentioned battery module 100.

[0074] It is understandable that in the event of thermal runaway, the interior of the entire box exhaust channel 202 is filled with high-temperature fluids such as high-temperature smoke or flames. After flowing out of the battery cells 110, these high-temperature fluids may impact the bottom of the battery box 200 and then impact other battery cells 110 in reverse, rather than flowing smoothly to the gas detector 400.

[0075] In the above-described embodiment of the battery pack proposed in the present application, smoke generated by the battery cells 110 can flow through the corresponding through-structures of the battery cells 110 to the box exhaust passage 202. For adjacent healthy battery cells 110, the plate sections abut against the battery cells 110, forming a relatively closed space. This makes it difficult for high-temperature fluid within the box exhaust passage 202 to flow back, thereby reducing the risk of heat from the high-temperature fluid transferring from the abnormal battery cells 110 to the healthy battery cells 110. Furthermore, when a small amount of smoke, flame, or other fluid is generated by the battery cells 110 of the battery module 100 before thermal runaway occurs, the through-structures with a relatively small projected area can increase the flow rate of the fluid, facilitating the discharge of the small amount of fluid before thermal runaway through the box exhaust passage 202 and enabling earlier detection, such as by the user or by a gas sensor. This facilitates earlier implementation of countermeasures, reduces the magnitude of pressure increases within the battery module 100 and the battery pack, reduces the risk of damage to the battery module 100 and the corresponding battery box 200 from high-voltage shock, and improves the safety of the battery pack.

[0076] For conventional battery cells 110 with relatively low energy density, the gas velocity generated during thermal runaway is approximately 5 to 50 L / s (liters per second), and the corresponding battery box 200 is usually equipped with a passive explosion-proof valve. The passive explosion-proof valve is passively opened by the high pressure generated during thermal runaway, and its opening pressure is approximately 4 to 10 kPa (kilopascals). However, when the battery cell 110 uses a higher energy density, for example, when the energy density of the battery cell 110 is greater than or equal to 250 watt-hours per kilogram, the gas velocity generated by the battery cell 110 during thermal runaway is approximately 400 L / s. The gas production rate of the battery cell 110 is significantly accelerated, and the pressure in the battery box 200 may increase instantly, which may cause the passive explosion-proof valve to not open in time, causing the battery box 200 to be over-pressurized, and may cause the battery box 200 to disintegrate.

[0077] Therefore, in some embodiments, the battery pack further includes a gas detector 400 and an active exhaust valve 300 that can be controlled to open; a discharge port is provided on the wall of the battery box 200, and the discharge port and the through hole 143 are respectively connected to the box exhaust channel 202, and the active exhaust valve 300 is provided at the discharge port; the gas detector 400 is used to detect gas information in the box exhaust channel 202, wherein the gas detector 400 can be provided in the box exhaust channel 202, or the gas detector 400 can be provided outside the box exhaust channel 202 (in this case, the gas in the box exhaust channel 202 can be moved to the gas detector 400 through a pipeline). The gas detector 400 is electrically connected to the active exhaust valve 300, and the active exhaust valve 300 is used to open according to the first preset output signal of the gas detector 400.

[0078] Among them, the box wall of the above-mentioned battery box 200 may include a bottom wall and side walls. Of course, the box wall of the battery box 200 may also include a detachable battery box cover. The bottom wall and the side walls are enclosed to form the above-mentioned box body accommodating cavity 201, or the bottom wall, the side walls and the battery box cover are enclosed to form the above-mentioned box body accommodating cavity 201.

[0079] The active exhaust valve 300 can be set as an active explosion-proof valve or a pressure relief valve and configured to be openable. It can be understood that the active exhaust valve 300 can be actively opened according to the first preset output signal of the gas detector 400 (as opposed to passive opening caused by internal high pressure impact).

[0080] Furthermore, the gas information within the exhaust passage 202 includes at least one of gas type, gas composition, and gas concentration. The gas detector 400 can be configured to output different second preset output signals based on the different gas information within the exhaust passage 202. For example, the gas detector 400 can be configured as a gas sensor or a concentration sensor. For example, the gas detector 400 can be configured as at least one of a smoke sensor and a gas sensor that detects the composition of thermal runaway gases. The smoke sensor can be configured as a sensor that detects solid particulate matter; the gas sensor that detects the composition of thermal runaway gases can be configured as a CO (carbon monoxide) sensor, an H2 (hydrogen) sensor, a hydrocarbon gas sensor, etc. The gas detector 400 is electrically connected to the active exhaust valve 300, which can be understood as at least enabling signal transmission between the gas detector 400 and the active exhaust valve 300. For example, the gas detector 400 can be electrically connected to the active exhaust valve 300 via a connecting line such as an electric wire, or the gas detector 400 can be electrically connected to the active exhaust valve 300 via a wireless communication device such as a Bluetooth communication device.

[0081] In this embodiment, when the battery cell 110 in the battery pack generates fluids such as smoke and flame before thermal runaway occurs, the fluid can flow to the gas detector 400 through the box discharge channel 202, wherein the flow path of the fluid can refer to Figure 1 As shown by the dotted arrow in . Among them, there is still a certain time interval from the initial formation of fluids such as smoke and flames to the formation of thermal runaway in the battery cell 110, and the time interval is generally between tens of seconds and several minutes. At this time, the through structure with a relatively small projected area can increase the flow speed of the fluid, which is conducive to the early detection of a small amount of fluid before thermal runaway by the gas detector 400; the gas detector 400 can output a first preset output signal based on the detected gas information, and the active exhaust valve 300 can be opened according to the first preset output signal, thereby improving the opening efficiency, reducing the pressure increase in the box exhaust channel 202, reducing the risk of damage to the battery box 200 due to high-voltage impact, and improving the safety of the battery pack.

[0082] In some embodiments, the gas detector 400 can be at least partially disposed within the box exhaust passage 202. In this case, for the high-temperature fluid generated by the high-energy-density battery cell 110 before thermal runaway, the gas detector 400 is at least partially disposed within the box exhaust passage 202, thereby having a higher detection rate. This means that the flue gas and other fluids can flow more smoothly and quickly to the gas detector 400, which is beneficial for improving the energy density and safety of the battery pack. In other words, when the battery cell 110 adopts a higher energy density, for example, when the energy density of the battery cell is greater than or equal to 250 watt-hours per kilogram, the battery pack still has a higher safety.

[0083] In some embodiments, reference Figure 1 The battery module 100 includes a filler 150 and at least two battery cells 110 arranged side by side. A connecting gap is formed between the battery cells 110, and at least a portion of the filler 150 is filled in the connecting gap of the battery cells 110. The filler 150 can be configured as a potting compound, such as a polyurethane or silicone material, to improve the installation stability of the battery cells 110. In addition, the filler 150 can be made of an insulating potting compound with a thermal conductivity of less than 0.1 W / mK (watts per meter degree) to improve the thermal insulation performance between the battery cells 110.

[0084] In some embodiments, reference Figure 1 The battery pack further includes a connecting wire, one end of which is electrically connected to the gas detector 400, and the other end of which passes through the filling body 150 and extends out of the side of the filling body 150 facing away from the gas detector 400, for example, Figure 1 The lower end of the connecting wire is electrically connected to the gas detector 400, and the upper end of the connecting wire passes through the filling body 150 and extends out of the upper side of the filling body 150. Among them, the end of the connecting wire that passes through the filling body 150 and extends out of the filling body 150 facing away from the gas detector 400 can form a connecting joint (refer to Figure 1 ) and connected to a component such as a travel controller, or the connecting line passes through the filling body 150 and extends out of the filling body 150 at one end facing away from the gas detector 400 to be directly connected to a component such as a travel controller. In addition, the connecting line may include at least one of a power supply line and a signal line.

[0085] In this embodiment, the other end of the connecting wire passes through the filling body 150 and extends out of the filling body 150 to face away from the gas detector 400, so that part of the connecting wire located inside the filling body 150 can be protected by the filling body 150, which is beneficial to reducing the risk of high-temperature fluid damaging the connecting wire, improving the reliability of the gas detector 400 in transmitting signals outward in a high-temperature environment, and further improving the safety of the battery pack.

[0086] In some embodiments, reference Figure 1 A module recess 101 is formed on the bottom wall of the battery module 100, and the module recess 101 is connected to the box discharge channel 202; when projected in a direction perpendicular to the bottom wall of the battery module 100, at least part of the projection of the gas detector 400 is located within the module recess 101. Alternatively, in some alternative embodiments, when projected in a direction perpendicular to the bottom wall of the battery module 100, the projection of the gas detector 400 is arranged outside the module recess 101, and the ratio of the distance from the projection of the gas detector 400 to the boundary of the module recess 101 to the diameter of the projection envelope circle of the module recess 101 is less than or equal to 3 (for example, less than or equal to 2 or less than or equal to 1), which can be understood as the gas detector 400 being relatively close to the module recess 101.

[0087] Before thermal runaway, the flue gas flowing out of the battery cell 110 has a relatively low temperature, a slow flow rate, and has a tendency to flow upward. In the above embodiment, the module recess 101 can provide space for the flue gas with a relatively low temperature and a slow flow rate to flow upward, and the flue gas forms a local low pressure after flowing upward in the module recess 101, which is conducive to guiding the flue gas to flow toward the module recess 101. Therefore, at least part of the projection of the gas detector 400 is set in the module recess 101, or the ratio of the distance from the projection of the gas detector 400 to the boundary of the module recess 101 to the diameter of the projection envelope circle of the module recess 101 is less than or equal to 3, which is conducive to improving the success rate of the gas detector 400 in detecting flue gas, improving the timeliness of opening the active exhaust valve 300, and further improving the safety of the battery pack.

[0088] Furthermore, the battery module 100 includes a side wall section, and in this case, a partial box discharge channel 202 can be formed between the side wall section and the box wall of the battery box 200, and between the bottom wall of the battery module 100 and the bottom wall of the battery box 200; a partial opening of the module recess 101 is set on the side wall section of the battery module 100, and another partial opening of the module recess 101 is set on the bottom wall of the battery module 100.

[0089] In this embodiment, the space between the side wall section and the box wall of the battery box 200 can further provide space for the smoke to flow upward, which is more conducive to guiding the smoke to flow toward the module recess 101, and is more conducive to improving the success rate of the gas detector 400 in detecting smoke, further improving the timeliness of the opening of the active exhaust valve 300, and further improving the safety of the battery pack.

[0090] In some embodiments, reference Figure 1 A module recess 101 is formed on the outer wall of the battery module 100, and the module recess 101 is connected to the box discharge channel 202; when projected along the axial direction of the discharge port, for example, along Figure 1The projection is made in the up-down direction of the discharge port, and at least part of the projection of the discharge port is set in the module recess 101. Alternatively, the projection is made along the axial direction of the discharge port, for example, along Figure 1 The projection of the discharge port is set outside the module recess 101, and the ratio of the distance from the projection of the discharge port to the boundary of the module recess 101 to the diameter of the projection envelope circle of the discharge port is less than or equal to 3 (for example, less than or equal to 2 or less than or equal to 1). It can be understood that the discharge port is close to the module recess 101.

[0091] After thermal runaway occurs, the active exhaust valve 300 is opened; when high-temperature fluids such as smoke and flames are discharged outward through the box exhaust channel 202, the cross-sectional area of ​​the box exhaust channel 202 at the module recess 101 becomes larger, which can make the flow speed of the high-temperature fluid relatively slow, thereby reducing the impact force of the high-temperature fluid on the box wall of the battery box 200, reducing the risk of the battery box 200 being damaged by the impact, and further improving the safety of the battery box 200 and the battery pack.

[0092] Further, refer to Figure 6 , at least part of the discharge port is set beside all the battery cells 110; along the direction from the battery cell 110 to the discharge port, the depth of the module recess 101 gradually increases; for example, referring to Figure 6 , along the direction from the battery cell 110 to the discharge port, the module recess 101 has depth values ​​h1 and h2 respectively, and the depth value h2 is greater than h1.

[0093] In this embodiment, the depth of the module recess 101 gradually increases along the direction from the battery cell 110 to the discharge port, thereby avoiding a sudden change in the cross-sectional area of ​​the box discharge channel 202, which is beneficial to reducing the risk of high-temperature fluids such as smoke and flames forming a torrent in the module recess 101, and reducing the risk of high-temperature fluids accidentally impacting and flying out due to the formation of a torrent, thereby further improving the safety of the battery box 200 and the battery pack.

[0094] In some embodiments, reference Figure 7 and Figure 8 The battery pack further includes a gas actuator 500 for discharging gas from the box exhaust passage 202. The gas actuator 500 can be configured as a fan or the like; the gas actuator 500 can be disposed within the box exhaust passage 202 or at an opening in the wall of the battery box 200, and this embodiment is not limited thereto.

[0095] In order to facilitate the installation of the gas driver 500, a connecting port may be provided on the wall of the battery box 200, and the battery pack may include a gas driver 500 provided at the connecting port; the gas driver 500 is used to drive the gas in the box exhaust channel 202 to be discharged outward from the connecting port, or the gas driver 500 is used to drive the external gas to flow from the connecting port into the box exhaust channel 202 so that the gas in the box exhaust channel 202 is discharged outward from the exhaust port on the wall of the battery box 200. And / or, a connecting port and an exhaust port may be provided on the wall of the battery box 200, the exhaust port is provided on one side of the battery box 200, and the connecting port is provided on the other opposite side of the battery box 200, so that the gas in the box exhaust channel 202 is discharged outward in an orderly manner. For example, the exhaust port is provided on one side of the bottom wall of the battery box 200 (for example Figure 1 The communication port is provided on the other opposite side of the bottom wall of the battery box 200 (eg Figure 1 The battery pack may further include a gas actuator 500 disposed at the exhaust port; and / or the battery pack may include a gas actuator 500 disposed within the exhaust passage 202 of the battery case. The gas actuator 500 is configured to drive the gas within the exhaust passage 202 to be discharged outwardly through the exhaust port on the wall of the battery case 200.

[0096] In this embodiment, the gas driver 500 can drive the gas in the box exhaust channel 202 to be discharged outward after being started, and the gas in the box exhaust channel 202 begins to flow and exchange with the external gas. The concentration of the combustible gas in the box exhaust channel 202 is reduced, which is beneficial to reducing the concentration of the combustible gas in the box exhaust channel 202 to below the explosion limit, which is beneficial to reducing the possibility of explosion and improving the safety of the battery pack.

[0097] In some embodiments, the gas driver 500 is electrically connected to the gas detector 400, and the gas driver 500 is used to start according to the second preset output signal of the gas detector 400, so that the gas driver 500 can be opened faster by the second preset output signal, so that the gas in the box exhaust channel 202 starts to flow earlier and exchanges with the external gas earlier, and the concentration of the combustible gas in the box exhaust channel 202 is reduced earlier, which is beneficial to reduce the concentration of the combustible gas in the box exhaust channel 202 to below the explosion limit earlier, further helping to reduce the possibility of explosion, and further improving the safety of the battery pack.

[0098] In some embodiments, the gas actuator 500 is configured to adjust the speed of the driving gas. For example, the gas actuator 500 is configured as a fan with adjustable speed. The gas actuator 500 is configured to generate different driving gas speeds according to different second preset output signals. The different second preset output signals correspond to different gas information within the housing exhaust passage 202, such as different gas types, different gas components, or different gas concentrations.

[0099] In this embodiment, the gas driver 500 can generate different driving gas speeds according to different second preset output signals, thereby improving the efficiency of reducing the concentration of combustible gas in the box exhaust passage 202 to below the explosion limit.

[0100] In some embodiments, for the gas actuator 500 disposed at the exhaust port on the wall of the battery box 200 and / or the gas actuator 500 disposed at the communication port on the wall of the battery box 200, the battery pack further includes a controllably openable door, such as an electrically operated door. The door cover is disposed on the wall of the battery box 200 and is used to cover the gas actuator 500. The controllable end of the door is electrically connected to the gas detector 400, and the door is configured to open in response to a second predetermined output signal.

[0101] In this embodiment, the door body can improve the sealing degree of the battery box 200 when closed, which is beneficial to improving the internal cleanliness of the battery box 200; when the door body is opened, it can cooperate with the gas driver 500 to allow the gas in the box discharge channel 202 to be discharged smoothly.

[0102] This application also proposes a traveling device comprising a travel mechanism and the aforementioned battery pack, the battery pack being used to power the travel mechanism. The traveling device comprises at least one of a flying car and a land vehicle. For a flying car, the travel mechanism comprises rotors and corresponding motors, among other structures; for a land vehicle, the travel mechanism comprises wheel assemblies, corresponding transmission mechanisms, and corresponding motors, among other structures. When the traveling device comprises both a flying car and a land vehicle, the flying car can be configured to be detachably mounted on the land vehicle.

[0103] In some embodiments, the driving device may further include a driving controller, the signal input end of the driving controller is electrically connected to the gas detector 400, and the signal output end of the driving controller is electrically connected to the active exhaust valve 300; wherein, the driving controller may include a battery management system, a driving control system of the driving device, etc., which is not limited in this embodiment.

[0104] In this embodiment, the travel controller may be configured to open the active exhaust valve 300 based on a preset output signal from the gas detector 400, and / or to dock the vehicle or output a preset prompt signal based on the preset output signal from the gas detector 400. In some embodiments, the travel controller may open the active exhaust valve 300 and / or dock the vehicle or output a preset prompt signal based on the preset output signal from the gas detector 400 by looking up a table and determining the relationship between the preset output signal from the gas detector 400 and a preset threshold value.

[0105] In some embodiments, when the driving device includes a flying car, the driving controller can be used to land the flying car according to a preset output signal of the gas detector 400, thereby improving the safety of the flying car.

[0106] This application also proposes a control method for a battery pack, which is applied to the above-mentioned battery pack; Figure 9 In one embodiment, the control method includes the following steps:

[0107] In step S110 , if the gas information is within the first preset range (eg, the gas concentration is within the first preset range), the gas detector 400 outputs a first preset output signal. It is understood that the gas information refers to the gas information within the above-mentioned box exhaust passage 202 .

[0108] Step S120 : opening the active exhaust valve 300 according to the first preset output signal.

[0109] In this embodiment, when the battery cells 110 in the battery pack form fluids such as smoke and flames before thermal runaway occurs, the gas detector 400 can output a first preset output signal based on the detected gas information, and the active exhaust valve 300 can be opened according to the first preset output signal, thereby improving the opening efficiency, reducing the pressure increase in the box discharge channel 202, reducing the risk of the battery box 200 being damaged by high-voltage impact, and improving the safety of the battery pack.

[0110] For the battery pack including the gas driver 500 electrically connected to the gas detector 400, the present application also proposes a control method for the battery pack; Figure 10 In one embodiment, the control method includes the following steps:

[0111] In step S210 , if the gas information is within the second preset range (eg, the gas concentration is within the second preset range), the gas detector 400 outputs a second preset output signal. It is understood that the gas information refers to the gas information within the above-mentioned box exhaust passage 202 .

[0112] Step S220 , starting the gas actuator 500 according to the second preset output signal.

[0113] In this embodiment, the gas driver 500 can be opened more quickly through the second preset output signal, so that the gas in the box exhaust channel 202 starts to flow earlier and exchanges with the external gas, and the concentration of the combustible gas in the box exhaust channel 202 is reduced earlier, which is beneficial to reduce the concentration of the combustible gas in the box exhaust channel 202 to below the explosion limit earlier, further helping to reduce the possibility of explosion, and further improving the safety of the battery pack.

[0114] Furthermore, the gas information in the box exhaust passage 202 includes at least one of gas type, gas component, and gas concentration;

[0115] If the gas information is within the second preset range, the step of causing the gas detector 400 to output a second preset output signal (i.e., step S210 ) includes: if the gas information is within the second preset range, causing the gas detector 400 to output different second preset output signals according to different gas information;

[0116] The step of starting the gas driver 500 according to the second preset output signal (i.e., the above-mentioned step S210) includes: according to different second preset output signals and preset corresponding relationships, the gas driver 500 forms different driving gas speeds, which can be understood as speed adjustment while the gas driver 500 remains started.

[0117] In this embodiment, the gas driver 500 can form different driving gas speeds according to different second preset output signals, thereby improving the efficiency of reducing the concentration of combustible gas in the box exhaust channel 202 to below the explosion limit.

[0118] Wherein, the control methods of the battery pack in the above two embodiments may be used in combination if they are not contradictory.

[0119] It can be understood that since the control method of the driving equipment and battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0120] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery module, characterized in that: The battery module includes a battery cell, a fireproof plate and a support plate arranged in sequence, the support plate is used to be fixedly connected to the battery box to support the battery cell and the fireproof plate, and the support plate is provided with a through hole; the fireproof plate includes a plate body section, and the two sides of the plate body section respectively abut the battery cell and the support plate; a through structure is provided on the plate body section, and the through structure penetrates the thickness direction of the fireproof plate and is connected to the through hole; projected along the axial direction of the through hole, the projected area of ​​the through structure located in the through hole is smaller than the projected area of ​​the through hole.

2. The battery module according to claim 1, wherein: A plate body recess is provided on the side of the plate body segment facing the battery core, the depth of the plate body recess is less than the thickness of the plate body segment, the penetrating structure is provided on the bottom wall of the plate body recess, and the penetrating structure penetrates the bottom wall of the plate body recess in the thickness direction.

3. The battery module according to claim 2, wherein: The battery module further includes an annular pad. Along the axial direction of the annular pad, one side of the annular pad abuts against the plate segment, and the other side of the annular pad abuts against the battery cell.

4. The battery module according to claim 3, wherein: The annular pad is arranged in the recess of the plate body; The side of the annular pad facing away from the battery cell abuts against the bottom wall of the plate recess, and / or the end of the battery cell abutting against the annular pad extends into the plate recess.

5. The battery module according to any one of claims 1 to 4, wherein: The penetrating structure includes a penetrating gap, and the extending direction of the penetrating gap is parallel to the board surface of the fireproof board.

6. The battery module according to claim 5, wherein: The penetrating structure comprises at least two spaced-apart penetrating slits; and / or, At least part of the through-slits comprises arc segments, and the diameter of the arc segments is greater than or equal to 5 mm and less than or equal to 50 mm; and / or, The width of the through-slit is less than or equal to 3 mm; and / or, The total extension length of the through gap covered by each of the battery cells is greater than or equal to 10 mm; and / or, The strength of the fireproof board is less than the strength of the support board; and / or, The battery module includes a battery tray, and the battery tray includes a shell segment that surrounds a shell accommodating cavity; the battery cell is arranged in the shell accommodating cavity, and the support plate includes a bottom wall of the shell segment.

7. A battery pack, characterized in that: The battery pack includes a battery box and a battery module as described in any one of claims 1 to 6; the box walls of the battery box enclose a box accommodating cavity, the battery module is at least partially accommodated in the box accommodating cavity, and a box discharge channel is formed between the outer wall of the battery module and the box wall of the battery box.

8. The battery pack according to claim 7, wherein: The battery pack also includes a gas detector and an active exhaust valve that can be opened in a controlled manner; a discharge port is provided on the wall of the battery box, and the discharge port and the through hole are respectively connected to the box body discharge channel; the active exhaust valve is arranged at the discharge port; the gas detector is used to detect gas information in the box body discharge channel, the gas detector is electrically connected to the active exhaust valve, and the active exhaust valve is used to open according to a first preset output signal of the gas detector.

9. The battery pack according to claim 7, wherein: The battery pack further includes a gas driver configured to drive the gas in the box exhaust channel to be discharged outward.

10. The battery pack according to claim 9, wherein: The battery box wall is provided with a communication port, and the battery pack includes the gas actuator provided at the communication port; the gas actuator is used to drive the gas in the box exhaust channel to be discharged outwardly from the communication port, or the gas actuator is used to drive external gas to flow from the communication port into the box exhaust channel so that the gas in the box exhaust channel is discharged outwardly from the exhaust port on the battery box wall; and / or, The battery box has a wall provided with a communication port and a discharge port, the discharge port being provided on one side of the battery box and the communication port being provided on the other opposite side of the battery box; the battery pack at least includes the gas driver provided at the discharge port; and / or, The battery pack includes the gas driver disposed in the box exhaust channel, and the gas driver is used to drive the gas in the box exhaust channel to be discharged outward from the exhaust port on the box wall of the battery box.

11. The battery pack according to claim 8, wherein: The battery pack further includes a gas driver, which is used to drive the gas in the box exhaust channel to be discharged outward; The gas driver is electrically connected to the gas detector, and is configured to be started according to a second preset output signal of the gas detector.

12. The battery pack according to claim 11, wherein: The gas information in the box exhaust channel includes at least one of the gas type, gas component and gas concentration; the gas detector is configured to output different second preset output signals according to different gas information in the box exhaust channel, and the gas driver is configured to adjust the speed of the driving gas, and the gas driver is used to form different driving gas speeds according to different second preset output signals.

13. The battery pack according to claim 11, wherein: The battery pack includes the gas driver having a discharge port provided on the wall of the battery box; and / or the battery pack includes the gas driver having a communication port provided on the wall of the battery box; The battery pack also includes a door that can be opened in a controlled manner. The door cover is arranged on the wall of the battery box, and the door is used to cover the gas driver; the controllable end of the door is electrically connected to the gas detector, and the door is used to open according to the second preset output signal.

14. The battery pack according to any one of claims 11 to 13, wherein: The battery module includes a filling body and at least two battery cells arranged side by side, a connection gap is formed between the battery cells, and at least a portion of the filling body is filled in the connection gap of the battery cells; the battery pack also includes a connecting wire, one end of the connecting wire is electrically connected to the gas detector, and the other end of the connecting wire passes through the filling body and extends out of the side of the filling body facing away from the gas detector; and / or, The gas detector is at least partially disposed within the tank exhaust passage.

15. The battery pack according to claim 8, wherein: A module recess is formed on the bottom wall of the battery module, and the module recess is communicated with the box discharge channel; When projecting along a direction perpendicular to the bottom wall of the battery module, at least part of the projection of the gas detector is located within the module recess; or, when projecting along a direction perpendicular to the bottom wall of the battery module, the projection of the gas detector is arranged outside the module recess, and the ratio of the distance from the projection of the gas detector to the boundary of the module recess to the diameter of the projection envelope circle of the module recess is less than or equal to 3.

16. The battery pack according to claim 15, wherein: The battery module includes a side wall section, and a portion of the box body discharge channel is formed between the side wall section and the box wall of the battery box, and between the bottom wall of the battery module and the bottom wall of the battery box. Part of the opening of the module recess is arranged on the side wall section of the battery module, and another part of the opening of the module recess is arranged on the bottom wall of the battery module; and / or, Projected along the axial direction of the discharge port, at least a portion of the projection of the discharge port is arranged within the module recess; or, projected along the axial direction of the discharge port, the projection of the discharge port is arranged outside the module recess, and the ratio of the distance from the projection of the discharge port to the boundary of the module recess to the diameter of the envelope circle of the projection of the discharge port is less than or equal to 3; or, at least a portion of the discharge port is arranged beside all the battery cells, and the depth of the module recess gradually increases along the direction from the battery cells to the discharge port.

17. A traveling device, characterized in that: The traveling device includes a traveling mechanism and a battery pack according to any one of claims 7 to 16, wherein the battery pack is used to provide power to the traveling mechanism. The traveling device includes at least one of a flying car and a land car.

18. A method for controlling a battery pack, characterized in that: The control method is applied to the battery pack according to any one of claims 8, 11 to 16, and comprises the following steps: If the gas information is within a first preset range, causing the gas detector to output a first preset output signal; The active exhaust valve is opened according to the first preset output signal.

19. A method for controlling a battery pack, characterized in that: The control method is applied to the battery pack according to claim 12, and the control method includes the following steps: If the gas information is within a second preset range, causing the gas detector to output a second preset output signal; The gas driver is started according to the second preset output signal.

20. The control method according to claim 19, wherein: The gas information in the exhaust passage of the box includes at least one of gas type, gas component and gas concentration; If the gas information is within a second preset range, the step of causing the gas detector to output a second preset output signal includes: if the gas information is within the second preset range, causing the gas detector to output different second preset output signals according to different gas information; The step of starting the gas actuator according to the second preset output signal includes: causing the gas actuator to form different driving gas speeds according to different second preset output signals and preset corresponding relationships.

Images