Battery case, battery pack, and vehicle

Abstract

Disclosed in the present invention is a vehicle provided with a battery pack. The battery pack is provided with a battery case. The battery case comprises first side beams and blocking plates. A first cavity is provided inside each first side beam, a first cavity wall of the first cavity is formed on the side of the first side beam facing the interior of the battery case, first communicating holes are formed in the first cavity wall and penetrating the first cavity wall in the thickness direction of the first cavity wall, and a first gas discharge hole is further formed in the first side beam, so that the first cavity is communicated with the exterior of the first side beam; and the blocking plates are disposed at gas discharge ports of the battery case and define a gas discharge space with the inner wall of the battery case, wherein the first gas discharge hole and the gas discharge ports are separately communicated with the gas discharge space.

Description

Battery boxes, battery packs and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202322670780.8, filed on September 28, 2023, entitled “Battery Case, Battery Pack and Vehicle,” the entire contents of which are incorporated herein for all purposes. Technical Field

[0003] The present application relates to the field of batteries, and more specifically to a battery box, a battery pack and a vehicle. Background Art

[0004] With the shift to green energy, electric vehicles, thanks to their clean energy properties, are gradually becoming a mainstream trend. As a key component of electric vehicles, battery safety has become a major concern for users. When a battery is in an extreme state, the explosion-proof valve of the battery cell will open, causing the cell to release high-temperature electrolyte gas. This gas can cause thermal runaway and thermal safety issues in surrounding cells and the entire battery pack, and may even lead to extreme situations such as battery explosion. The current configuration of the exhaust ducts within the battery pack requires that the high-temperature electrolyte gas released by a battery cell in an extreme state must diffuse a long distance within the battery pack before it can be discharged. This results in poor gas recovery and still presents a significant risk of thermal runaway and thermal safety.

[0005] Summary of the Invention

[0006] The present invention is proposed to solve at least one of the above problems. According to the first aspect of the present application, a battery case is provided, the battery case is used to accommodate batteries, and the battery case includes: a first side beam and a baffle; wherein a first cavity is provided inside the first side beam, and the first side beam forms a first cavity wall of the first cavity on the side facing the inside of the battery case, and the first cavity wall has a first connecting hole penetrating along the thickness direction of the first cavity wall, and the first side beam is also provided with a first exhaust hole, so that the first cavity is connected to the outside of the first side beam; the baffle is provided at the exhaust port of the battery case, and is surrounded by the inner wall of the battery case to form an exhaust space; wherein the first exhaust hole and the exhaust port are respectively connected to the exhaust space.

[0007] In one embodiment of the present application, the battery box includes two first side beams that are spaced apart from each other, and the battery is used to be accommodated between the two first side beams.

[0008] In one embodiment of the present application, the battery box further includes: a second side beam, disposed between the two first side beams, for separating two battery accommodating cavities.

[0009] In one embodiment of the present application, a second chamber is provided inside the second side beam; the second side beam forms a second chamber wall and a third chamber wall of the second chamber on both sides of the two first side beams respectively; the second chamber wall has a second connecting hole extending along the thickness direction of the second chamber wall, and the third chamber wall has a third connecting hole extending along the thickness direction of the third chamber wall. The battery case further includes: a front crossbeam connected between the first side beam and the second side beam; wherein a third chamber is provided inside the front crossbeam, the third chamber being connected to one of the sub-chambers of the second chamber via a second exhaust hole, and the third chamber being connected to another sub-chamber of the second chamber via a third exhaust hole; a fourth exhaust hole is further provided on the front crossbeam, so that the third chamber is connected to the outside of the front crossbeam, and the fourth exhaust hole is connected to the exhaust space.

[0010] In one embodiment of the present application, the second chamber includes at least two sub-chambers, and the second communicating hole and the third communicating hole are respectively connected to different sub-chambers of the at least two sub-chambers.

[0011] In one embodiment of the present application, the at least two sub-chambers are arranged along the height direction.

[0012] In one embodiment of the present application, the front crossbeam is used to isolate the battery accommodating cavity and the power distribution cavity; the first exhaust hole is arranged on the first cavity wall and faces the power distribution cavity; the front crossbeam forms a fourth cavity wall of the third cavity on the side facing the power distribution cavity, and the fourth exhaust hole is arranged through the thickness direction of the fourth cavity wall.

[0013] In one embodiment of the present application, the baffle includes a first plate and a second plate connected to the first plate; wherein, the first plate is connected to the fourth cavity wall and the bottom plate of the battery box, and is arranged opposite to the first side beam; the fourth exhaust hole, the first exhaust hole and the exhaust port are located on the same side of the first plate; the second plate is connected to the first side beam and the fourth cavity wall, and is arranged opposite to the bottom plate; the first exhaust hole, the fourth exhaust hole and the exhaust port are all located between the second plate and the bottom plate.

[0014] In one embodiment of the present application, the battery box further includes: a front cross beam connected between the two first side beams, used to isolate the battery accommodating cavity and the distribution cavity; the first exhaust hole is arranged on the first cavity wall and faces the distribution cavity.

[0015] In one embodiment of the present application, the baffle includes a first plate and a second plate connected to the first plate; wherein, the first plate is connected to the front cross beam and the bottom plate of the battery box, and is arranged opposite to the first side beam; the first exhaust hole and the exhaust port are located on the same side of the first plate; the second plate is connected to the first side beam and the front cross beam, and is arranged opposite to the bottom plate; the first exhaust hole and the exhaust port are both located between the second plate and the bottom plate.

[0016] In one embodiment of the present application, the exhaust port is provided on the first side beam and is not connected to the first chamber in the first side beam.

[0017] In one embodiment of the present application, the baffle also includes: a third plate positioned opposite to the front cross beam and connected between the bottom plate and the second plate; and the third plate is also connected between the first side beam and the first plate to form the exhaust space together with the first plate, the second plate and the inner wall of the battery box.

[0018] In one embodiment of the present application, the baffle includes a first plate and a second plate connected to the first plate; the first plate connects the first side beam and the bottom plate of the battery box, the second plate is connected to the first side beam and is arranged opposite to the bottom plate, and the first plate, the second plate and the inner wall of the battery box together form the exhaust space.

[0019] In one embodiment of the present application, the exhaust port is located opposite to the first plate.

[0020] In one embodiment of the present application, an air inlet is provided on the baffle at a position opposite to the bottom plate of the battery box.

[0021] In one embodiment of the present application, an intake air duct is provided at the air inlet position, and the intake air duct is located in the exhaust space.

[0022] In one embodiment of the present application, the air inlet is provided on the second plate.

[0023] In one embodiment of the present application, a battery explosion-proof valve is provided at the exhaust port.

[0024] In one embodiment of the present application, the battery box further includes: a cold plate fixed on the first side beam and arranged opposite to the bottom plate of the battery box.

[0025] According to a second aspect of the present application, a battery pack is provided, comprising: any one of the above-mentioned battery boxes, and a battery accommodated in the battery box.

[0026] In one embodiment of the present application, the battery has a battery explosion-proof valve facing the first side beam.

[0027] According to a third aspect of the present application, a vehicle is provided, comprising: a vehicle body, and any one of the above-mentioned battery packs arranged on the vehicle body.

[0028] According to the battery case, battery pack and vehicle provided in the embodiments of the present application, a first chamber is provided inside the first side beam, a first connecting hole is provided on the first cavity wall of the first cavity that penetrates along the thickness direction of the first cavity wall, and a first exhaust hole is also provided on the first side beam, so that the first chamber is connected with the outside of the first side beam; and an exhaust port is provided on the battery case, and a baffle is provided at the exhaust port, which is provided on the exhaust port and enclosed with the inner wall of the battery case to form an exhaust space, and the first exhaust hole and the exhaust port are respectively connected with the exhaust space, so that the gas generated by the battery cell can be directly discharged into the first chamber and discharged through the first chamber, and the baffle is also provided to prevent the gas discharged from the first chamber from spraying into the distribution cavity, thereby improving the gas recovery effect and reducing the thermal runaway and thermal safety risks of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] FIG1 is a schematic exploded view of the structure of a battery pack according to an embodiment of the present invention;

[0031] FIG2 is a schematic top view of the exhaust flow direction provided by one embodiment of the present invention;

[0032] FIG3 is a schematic structural diagram of a first side beam provided by an embodiment of the present invention;

[0033] FIG4 is a schematic structural diagram of a second side beam provided by an embodiment of the present invention;

[0034] FIG5 is a schematic structural diagram of a front crossbeam provided by an embodiment of the present invention as viewed from one angle;

[0035] FIG6 is a schematic structural diagram of a front crossbeam provided by an embodiment of the present invention viewed from another angle;

[0036] FIG7 is a partial cross-sectional schematic diagram of a battery pack according to an embodiment of the present invention;

[0037] FIG8 is an enlarged schematic diagram of portion H in FIG7 ;

[0038] FIG9 is a top view of a portion of the structure shown in one embodiment of the present invention;

[0039] FIG10 is an enlarged schematic diagram of portion K in FIG9 .

[0040] Reference Signs: 10 - bottom plate 11 - first side beam 111 - first chamber 112 - first chamber wall 113 - first connecting hole 114 - first exhaust hole 12 - second side beam 121 - second chamber 122 - second chamber wall 123 - third chamber wall 124 - second connecting hole 125 - third connecting hole 13 - front cross beam 131 - third chamber 132 - second exhaust hole 133 - third exhaust hole 134 - fourth exhaust hole 135 - fourth chamber wall 14 - rear cross beam 20 - exhaust port 21 - power distribution chamber 30 - baffle 301 - air inlet 31 - first plate 32 - second plate 33 - third plate 34 - fourth plate 35 - fifth plate 40 - battery 41 - battery explosion-proof valve 50 - cold plate DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] An embodiment of the present application provides a battery case. Referring to Figures 1, 2 and 3, the battery case is used to accommodate a battery 40, and the battery case includes: a first side beam 11 and a baffle 30; wherein, a first chamber 111 is provided inside the first side beam 11, and a first cavity wall 112 of the first cavity 111 is formed on one side of the first side beam 11 facing the inside of the battery case, and the first cavity wall 112 has a first connecting hole 113 that penetrates along the thickness direction of the first cavity wall 112. A first exhaust hole 114 is also provided on the first side beam 11, so that the first cavity 111 is connected to the outside of the first side beam 11; the baffle 30 is provided at the exhaust port 20 of the battery case, and is surrounded by the inner wall of the battery case to form an exhaust space; the first exhaust hole 114 and the exhaust port 20 are respectively connected to the exhaust space.

[0047] In the above scheme, a first chamber 111 is provided within the first side beam 11, and a first connecting hole 113 is provided on the first cavity wall 112 of the first cavity 111, extending along the thickness direction of the first cavity wall 112. A first exhaust hole 114 is also provided on the first side beam 11, so that the first chamber 111 is connected to the outside of the first side beam 11. The battery case is provided with an exhaust port 20, and a baffle 30 is provided at the exhaust port 20. The baffle 30 is provided on the exhaust port 20 and encloses the inner wall of the battery case to form an exhaust space. The first exhaust hole 114 and the exhaust port 20 are respectively connected to the exhaust space, so that the gas generated by the battery cell can be directly discharged into the first cavity 111 and discharged through the first cavity 111. The baffle 30 is also provided to prevent the gas discharged from the first cavity 111 from being sprayed into the distribution cavity 21, thereby improving the gas recovery effect and reducing the thermal runaway and thermal safety risks of the entire battery pack. The above structures are described in detail below with reference to the accompanying drawings.

[0048] When installing the first side beam 11, referring to FIG3 , a first chamber 111 is provided inside the first side beam 11. A first cavity wall 112 of the first cavity 111 is formed on the inside of the first side beam 111 toward the inside of the battery case. The first cavity wall 112 has a first communication hole 113 extending through the thickness of the first cavity wall 112, allowing gas ejected from the battery 40 to enter the first cavity 111 through the first communication hole 113. A first exhaust hole 114 is also provided on the first side beam 11. The first exhaust hole 114 communicates with the first cavity 111, thereby connecting the first cavity 111 to the outside of the first side beam 11, allowing gas within the first cavity 111 to be discharged from the first cavity 111 through the first exhaust hole 114. In other words, the interior of the first side beam 11 is a hollow cavity structure.

[0049] When determining the number of the first side beam 11 structures shown above, the number of the above-mentioned first side beam 11 structures provided on the battery box can be one. In some embodiments, referring to Figures 1 and 2, the number of the first side beams 11 can be two, and the two first side beams 11 are spaced apart from each other to form a space for accommodating the battery 40, and the battery 40 is accommodated between the two first side beams 11. At this time, the first connecting holes 113 on the two first side beams 11 can be made to face each other, that is, the first connecting hole 113 on one of the first side beams 11 faces the other first side beam 11. In some embodiments, the first exhaust holes 114 of the two first side beams 11 can also be positioned relative to each other, that is, the first exhaust hole 114 on one of the first side beams 11 faces the other first side beam 11.

[0050] In some embodiments, referring to FIG1 , the battery case may further include a bottom plate 10, which is used to carry and support the battery 40. When setting the bottom plate 10, any type of plate structure may be used as the bottom plate 10. The first side beam 11 may be provided on the bottom plate 10. Specifically, the first side beam 11 may be provided on one side of the bottom plate 10. When the battery case includes two first side beams 11, referring to FIG1 , FIG2 and FIG3 , the two first side beams 11 may be both provided on the bottom plate 10 and spaced apart from each other, so that space for arranging the battery 40 may be provided between the two first side beams 11. In some embodiments, the first side beam 11 and the bottom plate 10 may be made into an integral structure, that is, the first side beam 11 may be integrally processed while processing the bottom plate 10, so that the first side beam 11 is a raised beam structure at the edge of the bottom plate 10, which facilitates connecting the first side beam 11 and the bottom plate 10 together. In other embodiments, the first side beam 11 and the bottom plate 10 may be processed separately, and then the first side beam 11 may be connected to the bottom plate 10 using methods such as, but not limited to, bolt connection, clamping, etc.

[0051] 1 , 2 , 9 and 10 , an exhaust port 20 is further provided on the battery case, and a baffle 30 is provided at the exhaust port 20. The baffle 30 is provided on the first exhaust hole 114 and the exhaust port 20, and the baffle 30 and the inner wall of the battery case are combined to form an exhaust space. The first exhaust hole 114 and the exhaust port 20 are both connected to the exhaust space. Exemplarily, the first exhaust hole 114 and the exhaust port 20 are both located in the exhaust space, thereby separating the first exhaust hole 114 and the exhaust port 20 from other structures inside the battery pack, preventing the gas at the first exhaust hole 114 and the exhaust port 20 from entering other positions of the battery pack, and allowing the gas discharged from the first exhaust hole 114 to be discharged from the exhaust port 20 position faster.

[0052] For example, referring to Figures 1, 2, and 4, the battery case may further include a second side beam 12. The second side beam 12 may be disposed between the two first side beams 11. That is, the second side beam 12 divides the space enclosed by the two first side beams 11 into two independent spaces, thereby separating two battery accommodating chambers, each accommodating a battery 40. The second side beam 12 can prevent gas within the battery accommodating chamber from diffusing into the other chamber, thereby preventing the batteries 40 on either side of the second side beam 12 from interfering with each other. In some embodiments, the second side beam 12 may be disposed on the base plate 10. In some embodiments, the second side beam 12 and the base plate 10 may be integrally formed, that is, the second side beam 12 may be integrally formed at the same time as the base plate 10 is manufactured. This results in the second side beam 12 being a raised beam structure in the middle of the base plate 10, facilitating connection between the second side beam 12 and the base plate 10. In other embodiments, the second side beam 12 and the base plate 10 may be manufactured separately, and then connected to the base plate 10 using methods such as, but not limited to, bolting or snap-fitting.

[0053] In some embodiments, referring to FIG4 , a second chamber 121 may be provided within the second side beam 12. The second side beam 12 forms a second chamber wall 122 and a third chamber wall 123 of the second chamber 121 on either side of the two first side beams 11, respectively. Specifically, the second chamber wall 122 of the second chamber 121 faces one of the two first side beams 11, and the third chamber wall 123 of the second chamber 121 faces the other of the two first side beams 11. For example, the second chamber wall 122 may have a second communication hole 124 extending through the thickness of the second chamber wall 122, allowing gas exhausted from the battery 40 on one side of the second chamber wall 122 to enter the second chamber 121 through the second communication hole 124. The third chamber wall 123 may also have a third communication hole 125 extending through the thickness of the third chamber wall 123, allowing gas exhausted from the battery 40 on the other side of the third chamber wall 123 to enter the second chamber 121 through the third communication hole 125, thereby preventing gas exhausted from the battery 40 from diffusing within the battery pack.

[0054] In some embodiments, referring to FIG4 , the second chamber 121 may include at least two separate sub-chambers. The second and third connecting holes 124 and 125 communicate with different sub-chambers of the at least two sub-chambers, respectively. This allows gas exhausted from battery cells on different sides of the second side beam 12 to enter different sub-chambers of the second chamber 121, preventing cross-flow. The number of sub-chambers included in the second chamber 121 may be two, three, or four, for example.

[0055] For example, referring to FIG4 , at least two sub-chambers are arranged in the height direction so that the at least two sub-chambers occupy the width space of one sub-chamber. Of course, the arrangement of the at least two sub-chambers is not limited to the above-described arrangement, and other arrangements may also be adopted. For example, in some embodiments, the at least two sub-chambers may be arranged side by side. In other embodiments, when the number of sub-chambers is four or more, an array arrangement may also be adopted.

[0056] For example, referring to Figures 1, 2, 5, and 6, the battery case may further include a front crossbeam 13. The front crossbeam 13 is located on the front side of the battery case and is used to separate the battery 40 from the power distribution cavity 21. Specifically, it is used to isolate the battery receiving cavity from the power distribution cavity 21. For example, the front crossbeam 13 may be connected between the first side beam 11 and the second side beam 12. In some embodiments, if there is no second side beam 12 and only two first side beams 11, the front crossbeam 13 may be connected between the two first side beams 11.

[0057] For example, referring to Figures 5 and 6, a third chamber 131 may be provided within the front crossbeam 13. The third chamber 131 may communicate with a sub-chamber of the second chamber 121 via a second exhaust hole 132, so that gas entering through the second connecting hole 124 flows into the corresponding sub-chamber and then is discharged into the third chamber 131 through the second exhaust hole 132, thereby preventing gas from entering the power distribution chamber 21. The third chamber 131 may also communicate with another sub-chamber of the second chamber 121 via a third exhaust hole 133, so that gas entering through the third connecting hole 125 flows into the corresponding sub-chamber and then is discharged into the third chamber 131 through the third exhaust hole 133, thereby preventing gas from entering the power distribution chamber 21.

[0058] For example, when a second side beam 12 is provided, referring to Figures 5 and 6, a fourth exhaust hole 134 can be provided on the front crossbeam 13, so that the third chamber 131 is in communication with the outside of the front crossbeam 13, and the fourth exhaust hole 134 is in communication with the exhaust space. Specifically, the fourth exhaust hole 134 is also located in the exhaust space formed by the baffle 30 and the inner wall of the battery box, so that the gas in the third chamber 131 is discharged through the fourth exhaust hole 134, and the gas can also be prevented from entering other locations of the distribution cavity 21. Of course, in some embodiments, if the second side beam 12 shown above is not provided, the front crossbeam 13 does not need to be provided with the structure shown above, and only a plate structure can be used as the front crossbeam 13. For example, when the front crossbeam 13 is connected between the two first side beams 11, and no second side beam 12 is provided between the two first side beams 11, a solid plate structure can be used as the front crossbeam 13.

[0059] In some embodiments, referring to Figures 4, 5, and 6, when a second side beam 12 is provided, the third chamber 131 within the front crossbeam 13 may include at least two sub-chambers, stacked and spaced apart along the height direction. One sub-chamber communicates with a sub-chamber in the second side beam 12 via a second vent hole 132, and another, different sub-chamber communicates with a sub-chamber in the second side beam 12 via a third vent hole 133, thereby enabling one sub-chamber in the second side beam 12 to correspond to one sub-chamber in the front side beam. The second vent hole 132 and the third vent hole 133 can be arranged in a variety of ways. Exemplarily, a second vent hole 132 and a third vent hole 133 are provided on the cavity wall of the third cavity 131 on the side facing the battery 40, wherein the second vent hole 132 is located opposite a sub-cavity in the second side beam 12, and the third vent hole 133 is located opposite another sub-cavity in the second side beam 12, thereby enabling one sub-cavity in the third cavity 131 to communicate with a sub-cavity in the second cavity 121 through the corresponding vent hole. It should be understood that the above is only an exemplary embodiment of a method for communicating the second cavity 121 and the third cavity 131, and other arrangements may also be adopted. That is, in addition to the method shown above, other arrangements may also be adopted for the second vent hole 132 and the third vent hole 133.

[0060] For example, referring to Figures 3, 7 and 8, regardless of whether the second side beam 12 is set, the first exhaust hole 114 on the first side beam 11 can be set on the first cavity wall 112 and facing the distribution cavity 21, that is, the first exhaust hole 114 is set in the distribution cavity 21.

[0061] For example, when the second side beam 12 is provided, referring to Figures 5 and 6, the front cross beam 13 can form a fourth cavity wall 135 of the third cavity 131 on the side facing the distribution cavity 21, and the fourth exhaust hole 134 is provided through the thickness direction of the fourth cavity wall 135, that is, the fourth exhaust hole 134 faces the distribution cavity 21, so that the baffle 30 can be provided in the distribution cavity 21 to prevent the accommodation space of the battery 40 from being occupied.

[0062] When providing the baffle 30, any structure that can block the exhaust port 20 and the exhaust hole and enclose the inner wall of the battery case to form an exhaust space can be used. In other words, as long as the structure can isolate the exhaust port 20 and the exhaust hole from other structures in the battery pack, it is within the scope of the baffle 30 provided in the embodiments of the present application. The following is an exemplary description of one method for providing the baffle 30.

[0063] Exemplarily, with reference to Figures 7, 8, 9 and 10, the baffle 30 may include a first plate 31 and a second plate 32 connected to the first plate 31. The first plate 31 is connected to the front crossbeam 13 and the bottom plate 10 of the battery box, and is arranged opposite to the first side beam 11. The first exhaust hole 114 and the exhaust port 20 are located on the same side of the first plate 31, that is, the first exhaust hole 114 and the exhaust port 20 are both located in the exhaust space between the first plate 31 and the first side beam 11. In some embodiments, if the second side beam 12 and the front crossbeam 13 shown above are provided, and the fourth exhaust hole 134 shown above is provided on the front crossbeam 13, the exhaust hole, the fourth exhaust hole 134 and the first exhaust hole 114 can be located on the same side of the first plate 31.

[0064] For example, referring to Figures 7, 8, 9, and 10, the second plate 32 can connect the first side beam 11 and the front cross beam 13 and be positioned opposite the bottom plate 10. The first exhaust hole 114 and the exhaust port 20 are both located between the second plate 32 and the bottom plate, that is, the first exhaust hole 114 and the exhaust port 20 are both located in the exhaust space between the second plate 32 and the bottom plate 10. The exhaust port 20 and the first exhaust hole 114 are enclosed in the same space by the first side beam 11 and the wall of the power distribution cavity 21 to prevent interference with other structures within the power distribution cavity 21. In some embodiments, if a second side beam 12 and the front cross beam 13 shown above are provided, and the fourth exhaust hole 134 shown above is provided on the front cross beam 13, the first exhaust hole 114, the fourth exhaust hole 134 and the exhaust port 20 can all be located between the second plate 32 and the bottom plate 10, so that the exhaust port 20, the first exhaust hole 114 and the fourth exhaust hole 134 are enclosed in the same space by the first side beam 11 and the wall of the distribution cavity 21, thereby preventing interference with other structures in the distribution cavity 21.

[0065] In some embodiments, referring to Figures 9 and 10 , the exhaust port 20 can be positioned opposite the first plate 31 on the baffle 30, which is the plate opposite the first side beam 11 and the sidewall of the power distribution cavity 21. In some embodiments, the exhaust port 20 can also be positioned on the bottom plate 10 of the power distribution cavity 21 of the battery box.

[0066] In other embodiments, referring to Figures 9 and 10 , the exhaust port 20 may be disposed on the first side member 11 and may be disconnected from the first chamber 111 within the first side member 11 . This reduces the distance between the exhaust port 20 and the first exhaust hole 114 , thereby reducing the space enclosed by the baffle 30 and, consequently, the space occupied within the battery pack. It should be understood that the above is merely an exemplary embodiment of one method for disposing the exhaust port 20 , and other methods may also be employed.

[0067] For example, the exhaust port 20 can also be set on the front side of the distribution cavity 21, the first plate 31 connects the first side beam 11 and the bottom plate 10 of the battery box, the second plate 32 connects the first side beam 11 and is arranged opposite to the bottom plate 10, and the first plate 31, the second plate 32 and the inner wall of the battery box together form an exhaust space. For example, the left and right opposite sides of the first plate 31 can be connected to the first side beam 11 and the front inner wall of the distribution cavity 21 respectively, and the upper and lower opposite sides of the first plate 31 are connected between the second plate 32 and the bottom plate 10 of the battery box respectively. The second plate 32 is in the shape of a right triangle, wherein the two right-angled sides are respectively connected to the first side beam 11 and the inner wall of the front side of the distribution cavity 21, and the hypotenuse is connected to the upper side of the first plate 31, thereby forming an exhaust space with a straight triangle cross section with a corner of the front side of the distribution cavity 21.

[0068] 9 and 10 , a battery explosion-proof valve 41 may be provided at the exhaust port 20 to protect the internal structure of the battery pack and, when there is excessive gas in the battery pack, the gas may be discharged from the battery pack through the battery explosion-proof valve 41 to prevent the battery pack from exploding.

[0069] For example, when the exhaust port 20 is located on the first side beam 11, referring to Figures 8 and 10, the baffle 30 may further include a third plate 33 positioned opposite the front cross beam 13 and connected between the bottom plate 10 and the second plate 32. The third plate 33 is also connected between the first side beam 11 and the first plate 31 to form an exhaust space together with the first plate 31, the second plate 32, and the inner wall of the battery box. The third plate 33 can separate the exhaust port 20 from the front space of the distribution cavity 21, preventing gas at the exhaust port 20 from flowing into the front side of the distribution cavity 21.

[0070] For example, referring to Figures 8 and 10, an air inlet 301 can be provided on the baffle 30. The air inlet 301 is positioned opposite to the bottom plate 10 of the battery box, that is, the air inlet 301 is provided on the upper side of the baffle 30, and is used to allow the gas ejected from the battery 40 above the cold plate 50 to pass through the distribution cavity 21 and the air inlet 301 of the baffle 30 and flow into the exhaust space formed by the baffle 30 and the battery box. For example, in some embodiments, a special diversion structure can be provided in the distribution cavity 21 to guide the gas exhausted from the upper battery 40 to the position of the air inlet 301. The shape of the air inlet 301 can be any type, such as, but not limited to, circular, elliptical, rectangular, etc.

[0071] In some embodiments, referring to FIG8 , an air inlet 301 may be provided on the second plate 32. Exemplarily, the air inlet 301 may be a notch provided on the second plate 32 to facilitate the discharge of gas ejected from the battery 40 above the cold plate 50 out of the exhaust port 20. Of course, in other embodiments, the air inlet 301 may also be provided on the first plate 31.

[0072] In some embodiments, referring to FIG8 , an intake duct may be provided at the location of the air inlet 301, and the intake duct is located within the exhaust space. Specifically, a dedicated intake duct is provided within the exhaust space to direct the gas flowing in from the air inlet 301 to a location closer to the exhaust port 20. This also prevents the gas discharged from the first exhaust hole 114 or the fourth exhaust hole 134 from being directed toward the air inlet 301, thereby allowing the gas to flow directly out of the air inlet 301 and out of the baffle 30.

[0073] When setting the intake air duct, a variety of methods can be used. For example, referring to Figure 8, a fourth plate 34 can be set at the position of the air inlet 301 of the second plate 32 and opposite to the third plate 33, and the fourth plate 34 is spaced apart from the third plate 33. The left and right opposite sides of the fourth plate 34 are respectively connected between the first plate 31 and the first side beam 11, or the left and right opposite sides of the fourth plate 34 are respectively connected between the first plate 31 and the front inner wall of the distribution cavity 21. The second plate 32 is spaced apart from the bottom plate 10 of the battery box to form an intake air duct, one end of the intake air duct is close to the exhaust port 20, and the other end is connected to the position of the air inlet 301.

[0074] Various methods can be used to secure the baffle 30. Referring to FIG10 , for example, the baffle 30 can further include a fifth plate 35 connected to the first plate 31. The fifth plate 35 is connected to the front crossbeam 13, thereby increasing the connection area between the baffle 30 and the front crossbeam 13 and improving the securement of the baffle 30.

[0075] Of course, referring to Figure 1 , the battery housing may also include a rear crossbeam 14, which may be connected between the two first side beams 11. When a second side beam 12 is disposed between the two first side beams 11, the rear crossbeam 14 may also be connected between the first and second side beams 11, 12. Specifically, the rear crossbeam 14 serves as a plate structure that opposes the front crossbeam 13 in the front-to-back direction, enabling the crossbeam and side beams to enclose a space for accommodating the battery 40.

[0076] For example, referring to FIG1 , the battery case may further include a cold plate 50 secured to the first side beams 11 . When there are two first side beams 11 , the cold plate 50 may be secured to the two first side beams 11 by methods such as, but not limited to, screws or snap-fit ​​connections. When a second side beam 12 is provided between the two first side beams 11 , the cold plate 50 may be secured to the first and second side beams 11 , 12 , and located on the upper end surface of the second side beam 12 . When a front crossbeam 13 is provided, the cold plate 50 may also be secured to the first and second side beams 11 , 12 , and front crossbeam 13 , thereby enclosing two sealed spaces for accommodating the batteries 40 . For example, referring to FIG1 , the cold plate 50 may also be secured to the rear crossbeam 14 to enhance the reliability of the cold plate 50 connection. The cold plate 50 may be secured to the first and second side beams 11 , 12 , front crossbeam 13 , and rear crossbeam 14 via connecting portions, thereby enhancing the reliability of the connection. The connecting plate may be a bent plate, one of which is connected to the cold plate 50 by screws, and the other is connected to the side beam or the cross beam by screws.

[0077] In the various embodiments shown above, a first chamber 111 is provided in the first side beam 11, and a first communicating hole 113 is provided on the first cavity wall 112 of the first cavity 111, which penetrates along the thickness direction of the first cavity wall 112. A first exhaust hole 114 is also provided on the first side beam 11, so that the first chamber 111 is connected to the outside of the first side beam 11; and an exhaust port 20 is provided on the battery box, and a baffle 30 is provided at the exhaust port 20. The baffle 30 is provided on the exhaust port 20 and encloses the inner wall of the battery box to form an exhaust space. The first exhaust hole 114 and the exhaust port 20 are respectively connected to the exhaust space, so that the gas generated by the battery cell can be directly discharged into the first cavity 111 and discharged through the first cavity 111. In addition, the baffle 30 is provided to prevent the gas discharged from the first cavity 111 from spraying into the interior of the distribution cavity 21, thereby improving the gas recovery effect and reducing the thermal runaway and thermal safety risks of the entire battery pack.

[0078] Furthermore, the present invention also provides a battery pack, as shown in Figures 1 to 10 , comprising any of the above-described battery boxes and a battery 40 housed therein. The battery 40 can be supported on a bottom plate 10 of the battery box and positioned between two first side beams 11 .

[0079] Exemplarily, referring to FIG1 , the battery may have a battery explosion-proof valve 41, which may be provided at at least one of the two ends of the battery in the longitudinal direction. The battery is provided with a battery explosion-proof valve 41 on the end facing the first side beam 11. The gas ejected from the battery explosion-proof valve 41 may flow from the first connecting hole 113 of the first side beam 11 into the first chamber 111 of the first side beam 11, and then be discharged from the battery case through the first chamber 111, the first exhaust hole 114, and the exhaust port 20. Exemplarily, the battery may also be provided with a battery explosion-proof valve 41 on the side facing the second side beam 12. Other gas ejected from the battery explosion-proof valve 41 may flow from the second connecting hole 124 or the third connecting hole 125 of the second side beam 12 into the second chamber 121 inside the second side beam 12, and then be discharged from the battery case through the third chamber 131 of the front cross beam 13, the fourth exhaust hole 134, and the exhaust port 20.

[0080] In addition, the present application provides a vehicle, as shown in Figures 1 to 10 , comprising: a vehicle body, and any of the aforementioned battery packs disposed on the vehicle body. Specifically, the vehicle may be, but is not limited to, a passenger car, a truck, or a special engineering vehicle. The vehicle body comprises a frame, wheels, a gearbox, a steering wheel, and other structures, and any of the aforementioned battery packs is disposed on the vehicle body.

[0081] 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. A battery box for accommodating a battery (40), characterized in that: include: a first side beam (11), wherein a first cavity (111) is arranged inside the first side beam, a first cavity wall (112) of the first cavity is formed on a side of the first side beam facing the inside of the battery box, the first cavity wall has a first connecting hole (113) penetrating along the thickness direction of the first cavity wall, and the first side beam is also provided with a first exhaust hole (114) so ​​that the first cavity is connected with the outside of the first side beam; and A baffle (30) is arranged at the exhaust port (20) of the battery box and is enclosed with the inner wall of the battery box to form an exhaust space; wherein the first exhaust hole and the exhaust port are respectively connected to the exhaust space.

2. The battery box according to claim 1, characterized in that: The battery box includes two first side beams arranged at an interval, and the battery is used to be accommodated between the two first side beams.

3. The battery case according to claim 2, characterized in that: Also includes: A second side beam (12) is arranged between the two first side beams and is used to separate two battery accommodating cavities.

4. The battery case according to claim 3, characterized in that: A second cavity (121) is arranged inside the second side beam; the second side beam respectively forms a second cavity wall (122) and a third cavity wall (123) of the second cavity on both sides facing the two first side beams; the second cavity wall has a second connecting hole (124) penetrating along the thickness direction of the second cavity wall, and the third cavity wall has a third connecting hole (125) penetrating along the thickness direction of the third cavity wall; The battery box also includes: a front crossbeam (13), connected between the first side beam and the second side beam; wherein a third chamber (131) is arranged inside the front crossbeam, the third chamber is connected to one of the sub-chambers of the second chamber through a second exhaust hole (132), and the third chamber is also connected to another sub-chamber of the second chamber through a third exhaust hole (133); a fourth exhaust hole (134) is also arranged on the front crossbeam, so that the third chamber is connected to the outside of the front crossbeam, and the fourth exhaust hole is connected to the exhaust space.

5. The battery case according to claim 4, characterized in that: The second chamber includes at least two sub-chambers, and the second connecting hole and the third connecting hole are respectively connected to different sub-chambers of the at least two sub-chambers.

6. The battery case according to claim 5, characterized in that: The at least two sub-chambers are arranged along the height direction.

7. The battery case according to any one of claims 4 to 6, characterized in that: The front crossbeam is used to separate the battery accommodating cavity and the power distribution cavity (21); The first exhaust hole is arranged on the first cavity wall and faces the power distribution cavity; The side of the front cross beam facing the power distribution cavity forms the fourth cavity wall (135) of the third cavity, and the fourth exhaust hole is arranged through the thickness direction of the fourth cavity wall.

8. The battery case according to claim 7, characterized in that: The baffle comprises a first plate (31) and a second plate (32) connected to the first plate; Wherein, the first plate connects the fourth cavity wall and the bottom plate of the battery box, and is arranged opposite to the first side beam; the fourth exhaust hole, the first exhaust hole and the exhaust port are located on the same side of the first plate; The second plate connects the first side beam and the fourth cavity wall, and is arranged opposite to the bottom plate; the first exhaust hole, the fourth exhaust hole and the exhaust port are all located between the second plate and the bottom plate.

9. The battery case according to claim 2 or 3, characterized in that: Also includes: A front cross beam, connected between the two first side beams, and used to separate the battery accommodating cavity from the power distribution cavity; The first exhaust hole is arranged on the first cavity wall and faces the power distribution cavity.

10. The battery case according to claim 9, characterized in that: The baffle comprises a first plate and a second plate connected to the first plate; Wherein, the first plate connects the front cross beam and the bottom plate of the battery box, and is arranged opposite to the first side beam; the first exhaust hole and the exhaust port are located on the same side of the first plate; The second plate is connected to the first side beam and the front cross beam, and is arranged opposite to the bottom plate; the first exhaust hole and the exhaust port are both located between the second plate and the bottom plate.

11. The battery case according to any one of claims 8 to 10, characterized in that: The exhaust port is disposed on the first side beam and is not communicated with the first chamber in the first side beam.

12. The battery case according to claim 11, characterized in that: The baffle further comprises: a third plate (33) located opposite to the front cross beam and connected between the bottom plate and the second plate; The third plate is also connected between the first side beam and the first plate to enclose the first plate, the second plate and the inner wall of the battery box to form the exhaust space.

13. The battery case according to any one of claims 1 to 7, characterized in that: The baffle comprises a first plate and a second plate connected to the first plate; The first plate connects the first side beam and the bottom plate of the battery box, the second plate connects the first side beam and is arranged opposite to the bottom plate, and the first plate, the second plate and the inner wall of the battery box together form the exhaust space.

14. The battery case according to claim 13, characterized in that: The exhaust port is located opposite to the first plate.

15. The battery case according to any one of claims 1 to 14, characterized in that: An air inlet (301) is provided on the baffle at a position opposite to the bottom plate of the battery box.

16. The battery case according to claim 15, characterized in that: An intake air passage is provided at the air inlet position, and the intake air passage is located in the exhaust space.

17. The battery case according to claim 15 or 16, characterized in that: The air inlet is disposed on the second plate.

18. The battery case according to any one of claims 1 to 17, characterized in that: A battery explosion-proof valve (41) is provided at the exhaust port.

19. The battery case according to any one of claims 1 to 18, characterized in that: Also includes: A cold plate (50) is fixed on the first side beam and is arranged opposite to the bottom plate of the battery box.

20. A battery pack, characterized in that: include: The battery case according to any one of claims 1 to 19; and The battery is accommodated in the battery box.

21. The battery pack according to claim 20, characterized in that: The battery has a battery explosion-proof valve facing the first side beam.

22. A vehicle, characterized in that: include: Vehicle body; and The battery pack according to any one of claims 20 to 21 is provided on the vehicle body.

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