Battery box body, battery pack and new energy automobile

Abstract

The utility model discloses a battery box body, a battery pack and a new energy automobile. Belongs to the technical field of vehicles and comprises a beam body, the beam body defines an exhaust channel, a first exhaust hole and a second exhaust hole are formed in the two sides of the beam body in the width direction of the beam body respectively, and the first exhaust hole and the second exhaust hole are staggered in the height direction of the beam body. The exhaust valve of the battery cell on one side of the beam body is communicated with the exhaust channel through the first exhaust hole, the exhaust valve of the battery cell on the other side of the beam body is communicated with the exhaust channel through the second exhaust hole, and when thermal runaway happens to the battery cell on one side of the beam body, high-temperature and high-pressure gas generated by the battery cell can be exhausted into the exhaust channel. The staggered first exhaust holes and the second exhaust holes can prevent gas exhausted into the exhaust channels from being directly exhausted to the battery cells on the other side of the beam body, the risk that the battery cells on the other side of the beam body are heated can be reduced, and therefore the safety risk can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery housing, a battery pack, and a new energy vehicle. Background Technology

[0002] With the rapid growth in demand for power batteries from electric vehicles and other applications, battery safety has become an increasingly important concern. When a battery experiences thermal runaway, high-temperature and high-pressure gases are generated inside the battery. If the gases cannot be released in time, they will accumulate inside the battery, which may cause the gas pressure and temperature to continue to rise, increasing the risk of battery fire and explosion, posing a significant safety hazard. Utility Model Content

[0003] This invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, this invention proposes a battery housing that helps reduce safety risks.

[0004] This utility model also proposes a battery pack having the above-mentioned battery box.

[0005] This utility model also proposes a new energy vehicle with the above-mentioned battery pack.

[0006] According to an embodiment of the present invention, the battery housing includes a reinforcing beam, the reinforcing beam comprising: a beam body defining an exhaust channel extending along its length; a first exhaust hole is provided on one side of the beam body in the width direction, one end of the first exhaust hole being adapted to be opposite to and connected to the exhaust valve of a battery cell on one side of the beam body, the other end of the first exhaust hole being connected to the exhaust channel; a second exhaust hole is provided on the other side of the beam body, one end of the second exhaust hole being adapted to be connected to the exhaust valve of a battery cell on the other side of the beam body, the other end of the second exhaust hole being connected to the exhaust channel; the first exhaust hole and the second exhaust hole are staggered in the height direction of the beam body.

[0007] According to an embodiment of the present invention, the battery box has a reinforcing beam with a first vent hole and a second vent hole that are staggered in the height direction. The vent valves of the battery cells on both sides of the beam body are connected to the venting channel of the beam body through the first vent hole and the second vent hole, respectively. When a battery cell on one side of the beam body experiences thermal runaway, the high-temperature and high-pressure gas generated by the battery cell can be discharged into the venting channel. The staggered first vent hole and the second vent hole can prevent the gas discharged into the venting channel from being directly discharged to the battery cell on the other side of the beam body, which helps to reduce the risk of the battery cell on the other side of the beam body being heated, thereby helping to reduce safety risks.

[0008] According to some embodiments of the present invention, the reinforcing beam further includes: a partition plate disposed within the exhaust channel, the partition plate dividing the exhaust channel into a first exhaust channel and a second exhaust channel, the first exhaust hole communicating with the first exhaust channel, and the second exhaust hole communicating with the second exhaust channel.

[0009] According to some embodiments of the present invention, the first exhaust channel and the second exhaust channel are arranged vertically in the height direction of the beam body.

[0010] According to some embodiments of the present invention, there are multiple first vent holes, and each of the multiple first vent holes corresponds one-to-one with the vent valve of a plurality of battery cells on one side of the beam body; there are multiple second vent holes, and each of the multiple second vent holes corresponds one-to-one with the vent valve of a plurality of battery cells on the other side of the beam body.

[0011] According to some embodiments of the present invention, the battery box further includes: a box body and a pressure relief valve, wherein the box body defines a cell receiving cavity; the pressure relief valve passes through the box body and communicates with the exhaust channel; wherein the reinforcing beam is disposed in the cell receiving cavity and is fixedly connected to the box body.

[0012] According to some embodiments of the present invention, there are multiple pressure relief valves, and at least two of the multiple pressure relief valves are located on opposite sides of the box body.

[0013] According to some embodiments of the present invention, the battery box further includes a connecting beam, which is disposed in the cell receiving cavity and fixedly connected to the box body and the reinforcing beam respectively. The connecting beam defines a connecting channel, and the exhaust channel is connected to the pressure relief valve through the connecting channel.

[0014] According to some embodiments of the present invention, there are multiple reinforcing beams, and the multiple reinforcing beams are arranged at intervals.

[0015] The battery pack according to another embodiment of the present invention includes the battery housing described above.

[0016] According to the battery pack of this utility model embodiment, the beam body of its reinforcing beam has a first vent hole and a second vent hole that are staggered in the height direction. The vent valves of the battery cells on both sides of the beam body are connected to the vent channel of the beam body through the first vent hole and the second vent hole, respectively. When the battery cell on one side of the beam body experiences thermal runaway, the high-temperature and high-pressure gas generated by the battery cell can be discharged into the vent channel. The staggered first vent hole and the second vent hole can prevent the gas discharged into the vent channel from being directly discharged to the battery cell on the other side of the beam body, which helps to reduce the risk of the battery cell on the other side of the beam body being heated, thereby helping to reduce safety risks.

[0017] A new energy vehicle according to another embodiment of the present invention includes the battery pack described above.

[0018] According to an embodiment of the present invention, the new energy vehicle has a reinforcing beam with a first exhaust port and a second exhaust port that are staggered in the height direction. The exhaust valves of the battery cells on both sides of the beam body are connected to the exhaust channel of the beam body through the first exhaust port and the second exhaust port, respectively. When the battery cell on one side of the beam body experiences thermal runaway, the high-temperature and high-pressure gas generated by the battery cell can be discharged into the exhaust channel. The staggered first exhaust port and the second exhaust port can prevent the gas discharged into the exhaust channel from being directly discharged to the battery cell on the other side of the beam body, which helps to reduce the risk of the battery cell on the other side of the beam body being heated, thereby helping to reduce safety risks.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Figure 1 This is a perspective view of the reinforcing beam according to an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the reinforcing beam, battery cell, and housing body according to an embodiment of the present utility model;

[0022] Figure 3 This is a top view of a battery pack according to an embodiment of the present utility model;

[0023] Figure 4 This is a front view of the reinforcing beam according to an embodiment of the present utility model.

[0024] Figure label:

[0025] Reinforcing beam 1; beam body 11; exhaust channel 111; first exhaust channel 1111; second exhaust channel 1112; first exhaust hole 112; second exhaust hole 113; partition plate 12;

[0026] 2. Box body; 3. Pressure relief valve; 4. Connecting beam;

[0027] Battery housing 10; battery cell 20; vent valve 201; battery pack 100. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The following is combined Figures 1-4 This invention provides a detailed description of the battery housing 10, the battery pack 100, and the new energy vehicle according to embodiments of the present invention.

[0033] Reference Figure 1 and Figure 2As shown, according to an embodiment of the present invention, the battery box 10 includes a reinforcing beam 1, which includes a beam body 11. The beam body 11 defines an exhaust channel 111 extending along its length. In the width direction of the beam body 11, a first exhaust hole 112 is provided on one side of the beam body 11. One end of the first exhaust hole 112 is adapted to be opposite to and communicate with the exhaust valve 201 of the battery cell 20 on one side of the beam body 11, and the other end of the first exhaust hole 112 communicates with the exhaust channel 111. A second exhaust hole 113 is provided on the other side of the beam body 11. One end of the second exhaust hole 113 is adapted to be communicated with the exhaust valve 201 of the battery cell 20 on the other side of the beam body 11, and the other end of the second exhaust hole 113 communicates with the exhaust channel 111. In the height direction of the beam body 11, the first exhaust hole 112 and the second exhaust hole 113 are staggered. The length direction of the beam body 11 can be... Figure 1 In the left and right directions, the width direction of the beam body 11 can be... Figure 1 In the front-back direction, the height direction of the beam body 11 can be... Figure 1 The up and down directions in the middle.

[0034] It is understandable that the reinforcing beam 1 can strengthen the overall structural strength of the battery box 10, thereby improving the structural performance of the battery box 10. The reinforcing beam 1 is located between the battery cells 20 on both sides. The exhaust valve 201 of the battery cell 20 on one side of the reinforcing beam 1 is connected to the exhaust channel 111 through the first exhaust hole 112, and the exhaust valve 201 of the battery cell 20 on the other side of the reinforcing beam 1 is connected to the exhaust channel 111 through the second exhaust hole 113. That is to say, the battery cells 20 on both sides of the reinforcing beam 1 are connected to the exhaust channel, and the structure is relatively compact. When the battery cell 20 experiences thermal runaway, the high temperature and high pressure gas generated inside the battery cell 20 can be discharged to the exhaust channel 111, and then discharged through the exhaust channel 111 to avoid the accumulation of heat near the thermally runaway battery cell 20, disperse the heat of local thermal runaway, thereby helping to reduce the impact of the thermally runaway battery cell 20 on other normally operating battery cells 20 and reduce the risk of thermal runaway propagation.

[0035] The first vent 112 and the second vent 113 are staggered. When the cell 20 on one side of the beam body 11 experiences thermal runaway, the gas inside the cell 20 is discharged into the vent channel 111, which can prevent the gas from being directly discharged to the cell 20 on the other side of the beam body 11. This helps to reduce the risk of the cell 20 on the other side being heated, thereby helping to reduce safety risks.

[0036] Specifically, refer to Figure 2As shown, the first vent 112 is located on the rear side of the beam body 11, and the second vent 113 is located on the front side of the beam body 11. The vent valve 201 of the battery cell 20 located on the rear side of the beam body 11 is connected to the vent channel 111 through the first vent 112, and the vent valve 201 of the battery cell 20 located on the front side of the beam body 11 is connected to the vent channel 111 through the second vent 113. When the battery cell 20 on the rear side of the beam body 11 experiences thermal runaway, the gas generated inside the battery cell 20 is discharged into the vent channel 111 through the vent valve 201 and the first vent 112 in sequence. Since the first vent 112 and the second vent 113 are staggered, the gas discharged into the vent channel 111 is difficult to be directly discharged to the battery cell 20 on the front side of the beam body 11 through the second vent 113, thereby reducing the risk of the battery cell 20 on the front side of the beam body 11 being heated and effectively reducing the safety risk.

[0037] When thermal runaway occurs in the battery cell 20 on the front side of the beam body 11, the gas generated inside the battery cell 20 is discharged into the exhaust channel 111 through the exhaust valve 201 and the second exhaust port 113 in sequence. Since the second exhaust port 113 is staggered from the first exhaust port 112, the gas discharged into the exhaust channel 111 is difficult to be discharged directly to the battery cell 20 on the rear side of the beam body 11 through the first exhaust port 112. This reduces the risk of the battery cell 20 on the rear side of the beam body 11 being heated and effectively reduces the safety risk.

[0038] According to the embodiment of the present invention, the battery box 10 has a reinforcing beam 1 with a beam body 11 having a first vent 112 and a second vent 113 offset in the height direction. The vent valves 201 of the battery cells 20 on both sides of the beam body 11 are connected to the vent channel 111 of the beam body 11 through the first vent 112 and the second vent 113 respectively. When the battery cell 20 on one side of the beam body 11 experiences thermal runaway, the high temperature and high pressure gas generated by the battery cell 20 can be discharged into the vent channel 111. The offset first vent 112 and the second vent 113 can prevent the gas discharged into the vent channel 111 from being directly discharged to the battery cell 20 on the other side of the beam body 11, which helps to reduce the risk of the battery cell 20 on the other side of the beam body 11 being heated, thereby helping to reduce safety risks.

[0039] It should be noted that, referring to Figure 2 As shown, the battery cells 20 on the front and rear sides of the reinforcing beam 1 are inverted. The exhaust valve 201 of the battery cell 20 on the rear side of the reinforcing beam 1 is located above the exhaust valve 201 of the battery cell 20 on the front side of the reinforcing beam 1, so that the exhaust valve 201 of the battery cell 20 on the rear side of the reinforcing beam 1 is directly opposite to the first exhaust hole 112, and the exhaust valve 201 of the battery cell 20 on the front side of the reinforcing beam 1 is directly opposite to the second exhaust hole 113.

[0040] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2 As shown, the reinforcing beam 1 also includes a partition 12, which is disposed in the exhaust channel 111. The partition 12 divides the exhaust channel 111 into a first exhaust channel 1111 and a second exhaust channel 1112. The first exhaust hole 112 is connected to the first exhaust channel 1111, and the second exhaust hole 113 is connected to the second exhaust channel 1112. When the battery cell 20 on one side of the reinforcing beam 1 experiences thermal runaway, the partition 12 can prevent the gas generated by the thermal runaway from flowing to the battery cell 20 on the other side of the reinforcing beam 1, thus preventing the battery cell 20 on the other side of the reinforcing beam 1 from being heated, thereby further reducing safety risks.

[0041] Reference Figure 2 As shown, the exhaust valve 201 of the battery cell 20 on the rear side of the reinforcing beam 1 is connected to the first exhaust channel 1111 through the first exhaust hole 112, and the exhaust valve 201 of the battery cell 20 on the front side of the reinforcing beam 1 is connected to the second exhaust channel 1112 through the second exhaust hole 113. When the battery cell 20 on the rear side of the reinforcing beam 1 experiences thermal runaway, the gas generated inside the battery cell 20 is discharged into the first exhaust channel 1111 through the exhaust valve 201 and the first exhaust hole 112 in sequence. The partition 12 can prevent the gas in the first exhaust channel 1111 from being discharged to the second exhaust channel 1112, thereby preventing the gas from being discharged to the battery cell 20 on the front side of the reinforcing beam 1 through the second exhaust hole 113 connected to the second exhaust channel 1112, so as to prevent the battery cell 20 on the front side of the reinforcing beam 1 from being heated, thereby helping to reduce safety risks.

[0042] When thermal runaway occurs in the battery cell 20 on the front side of the reinforcing beam 1, the gas generated inside the battery cell 20 is discharged into the second exhaust channel 1112 through the exhaust valve 201 and the second exhaust hole 113 in sequence. The partition 12 can prevent the gas in the second exhaust channel 1112 from being discharged to the first exhaust channel 1111, thereby preventing the gas from being discharged to the battery cell 20 on the rear side of the reinforcing beam 1 through the first exhaust hole 112 connected to the first exhaust channel 1111, so as to prevent the battery cell 20 on the rear side of the reinforcing beam 1 from being heated, thereby helping to reduce safety risks.

[0043] In some embodiments of this utility model, the partition 12 may include a first sub-partition and a second sub-partition that are spaced apart, and a heat insulation cavity is defined between the first sub-partition and the second sub-partition. The heat insulation cavity is located between the first exhaust channel 1111 and the second exhaust channel 1112, which can reduce the heat exchange between the gas in the first exhaust channel 1111 and the gas in the second exhaust channel 1112.

[0044] In some embodiments of this utility model, reference is made to Figure 1 and Figure 2As shown, in the height direction of the beam body 11, the first exhaust passage 1111 and the second exhaust passage 1112 are arranged vertically. Among them, the partition 12 is arranged horizontally, that is, the partition 12 is parallel to the width direction of the beam body 11. The first exhaust passage 1111 is located above the partition 12, and the second exhaust passage 1112 is located below the partition 12. The reinforcing beam 1 is configured as a "day" - shaped beam. The horizontally arranged partition 12 has a small width and a small surface area, which is beneficial to reducing the heat exchange area between the gas in the first exhaust passage 1111 and the gas in the second exhaust passage 1112, thereby reducing the heat exchange between the gas in the first exhaust passage 1111 and the gas in the second exhaust passage 1112.

[0045] In addition, the first exhaust passage 1111 and the second exhaust passage 1112 are arranged vertically, which can reduce the occupied space of the beam body 11 in its width direction, so as to avoid the beam body 11 occupying the space on both sides for arranging the battery cells 20, facilitating the arrangement of a larger number or larger - volume battery cells 20, and being beneficial to improving the energy density of the battery pack 100.

[0046] In an embodiment not shown in other figures of the present utility model, in the width direction of the beam body 11, the first exhaust passage 1111 and the second exhaust passage 1112 are arranged front - to - back.

[0047] In some embodiments of the present utility model, referring to Figures 1-4 As shown, the number of the first exhaust holes 112 is multiple, and the multiple first exhaust holes 112 correspond one - to - one with the exhaust valves 201 of the multiple battery cells 20 on one side of the beam body 11. The number of the second exhaust holes 113 is multiple, and the multiple second exhaust holes 113 correspond one - to - one with the exhaust valves 201 of the multiple battery cells 20 on the other side of the beam body 11. When any one of the battery cells 20 undergoes thermal runaway, the high - temperature and high - pressure gas generated inside the battery cell 20 can be discharged to the first exhaust passage 1111 through the corresponding first exhaust holes 112 or discharged to the second exhaust passage 1112 through the second exhaust holes 113, and then can be discharged through the first exhaust passage 1111 or the second exhaust passage 1112 to disperse the heat concentrated by local thermal runaway and avoid the gas generated by the thermally runaway battery cell 20 from heating other battery cells 20.

[0048] It is understandable that by machining multiple first vent holes 112 on the beam body 11, the vent valve 201 of each battery cell 20 on the rear side of the beam body 11 can be connected to the first vent channel 1111, eliminating the need for a complex pipeline structure that connects the vent valves 201 of each battery cell 20 on the rear side of the beam body 11 together. Similarly, by machining multiple second vent holes on the beam body 11, the vent valve 201 of each battery cell 20 on the front side of the beam body 11 can be connected to the second vent channel 1112, eliminating the need for a complex pipeline structure that connects the vent valves 201 of each battery cell 20 on the front side of the beam body 11 together. The beam body 11 has a simple structure and is easy to manufacture.

[0049] In some embodiments of this utility model, reference is made to Figures 1-4 As shown, the battery box 10 also includes a box body 2 and a pressure relief valve 3. The box body 2 defines a cell receiving cavity, and the pressure relief valve 3 passes through the box body 2 and is connected to the exhaust channel 111. The reinforcing beam 1 is located in the cell receiving cavity and is fixedly connected to the box body 2.

[0050] It is understood that the cell housing cavity is suitable for accommodating the cell 20. The reinforcing beam 1 is located inside the cell housing cavity and is fixedly connected to the box body 2. The reinforcing beam 1 and the box body 2 can form a continuous force transmission path. The load borne by the box body 2 can be effectively transferred to the reinforcing beam 1 to share the load borne by the box body 2, which helps to reduce the risk of deformation of the box body 2, thereby improving the structural stability of the battery box 10. The pressure relief valve 3 is installed in the box body 2 and connected to the exhaust channel 111. When the cell 20 experiences thermal runaway, the high-temperature and high-pressure gas generated inside the cell 20 is discharged to the exhaust channel 111 and can flow to the pressure relief valve 3. When the gas pressure at the pressure relief valve 3 is greater than or equal to the preset value, the pressure relief valve 3 opens and connects to the outside of the box body 2 to discharge the gas to the outside of the box body 2, so as to avoid the gas from accumulating in the exhaust channel 111 and prevent the gas from heating and pressurizing in the exhaust channel 111, thereby helping to reduce safety risks.

[0051] It should be noted that the pressure relief valve 3 can be directly connected to the exhaust channel 111, or it can be indirectly connected to the exhaust channel 111. The pressure relief valve 3 can be an explosion-proof valve.

[0052] According to the embodiment of the present invention, the battery box 10 has a reinforcing beam 1 with a beam body 11 having a first vent 112 and a second vent 113 offset in the height direction. The vent valves 201 of the battery cells 20 on both sides of the beam body 11 are connected to the vent channel 111 of the beam body 11 through the first vent 112 and the second vent 113 respectively. When the battery cell 20 on one side of the beam body 11 experiences thermal runaway, the high temperature and high pressure gas generated by the battery cell 20 can be discharged into the vent channel 111. The offset first vent 112 and the second vent 113 can prevent the gas discharged into the vent channel 111 from being directly discharged to the battery cell 20 on the other side of the beam body 11, which helps to reduce the risk of the battery cell 20 on the other side of the beam body 11 being heated, thereby helping to reduce safety risks.

[0053] In some embodiments of this utility model, there are multiple pressure relief valves 3. After the gas generated by the thermal runaway of the battery cell 20 is discharged into the exhaust channel 111, the gas can be discharged through multiple pressure relief valves 3. Multiple pressure relief valves 3 can increase the flow area of ​​the gas discharged from the exhaust channel 111, which is beneficial to improve the exhaust efficiency and quickly discharge the gas generated by the thermal runaway of the battery cell 20, avoid the gas from accumulating in the exhaust channel 111, prevent the gas from heating and pressurizing in the exhaust channel 111, reduce the risk of instantaneous fire and explosion, and multiple pressure relief valves 3 can share the pressure of gas discharge, preventing a single pressure relief valve 3 from being damaged due to overload. In addition, even if some pressure relief valves 3 are damaged, the gas in the exhaust channel 111 can still be discharged through other pressure relief valves 3 to achieve stable and reliable pressure relief, which is beneficial to further reduce safety risks.

[0054] In some embodiments of this utility model, reference is made to Figure 3 As shown, at least two of the multiple pressure relief valves 3 are located on opposite sides of the housing body 2. When the battery cell 20 experiences thermal runaway, the gas generated inside the battery cell 20 is discharged into the exhaust channel 111. The gas can then be dispersed and discharged from the pressure relief valves 3 on opposite sides of the housing body 2, preventing the gas from accumulating on one side of the housing body 2 and preventing the gas pressure from rising. This helps to reduce the resistance to gas flow and facilitates smooth gas discharge.

[0055] In some embodiments, refer to Figure 3 As shown, there are two pressure relief valves 3, which are respectively located on the front and rear sides of the main body 2 to facilitate smooth gas discharge.

[0056] In other embodiments not shown in the figures, at least two of the plurality of pressure relief valves 3 may be located on the left and right sides of the tank body 2 to facilitate smooth gas discharge.

[0057] In some embodiments of this utility model, reference is made to Figure 3As shown, the battery box 10 also includes a connecting beam 4. The connecting beam 4 is located in the cell receiving cavity and is fixedly connected to the box body 2 and the reinforcing beam 1 respectively. The connecting beam 4 defines a connecting channel. The exhaust channel 111 is connected to the pressure relief valve 3 through the connecting channel to realize the indirect connection between the exhaust channel 111 and the pressure relief valve 3.

[0058] It is understandable that the connecting beam 4 is located inside the cell housing cavity and is fixedly connected to the box body 2 and the reinforcing beam 1 respectively. The connecting beam 4, the reinforcing beam 1 and the box body 2 can form a continuous force transmission path. The load borne by the box body 2 can be effectively transferred to the connecting beam 4 to further share the load borne by the box body 2, which helps to reduce the risk of deformation of the box body 2, thereby improving the structural stability of the battery box 10. The connecting beam 4 defines a connecting channel that is connected to the exhaust channel 111 and the pressure relief valve 3. The exhaust channel 111 and the connecting channel can form a continuous exhaust path. When the cell 20 experiences thermal runaway, the high temperature and high pressure gas generated inside the cell 20 is discharged into the exhaust channel 111. The gas flows from the exhaust channel 111 to the connecting channel, then from the connecting channel to the pressure relief valve 3, and finally is discharged to the outside of the battery box 10 through the pressure relief valve 3, avoiding the accumulation of gas inside the battery box 10 and helping to reduce safety risks.

[0059] In other embodiments of this utility model, which are not shown in the figures, the box body 2 defines a connecting channel, and the exhaust channel 111 is indirectly connected to the pressure relief valve 3 through the connecting channel.

[0060] In some embodiments of this utility model, reference is made to Figure 3 As shown, there are multiple reinforcing beams 1, which are spaced apart. It can be understood that the multiple spaced reinforcing beams 1 can strengthen the structural strength of multiple parts of the battery box 10, which is beneficial to improving the local load resistance of the battery box 10. When the battery box 10 is subjected to impact force, the impact force can be distributed and transmitted to the multiple spaced reinforcing beams 1, avoiding excessive local stress and deformation of the battery box 10, which is beneficial to improving the structural stability of the battery box 10.

[0061] In some embodiments of this utility model, reference is made to Figure 3 As shown, the reinforcing beam 1 extends along the width direction of the battery box 10, that is... Figure 3 The crossbeams of the battery box 10 are formed in the left and right directions, and the battery cells 20 are arranged on the front and rear sides of the reinforcing beam 1.

[0062] In other embodiments of this utility model, which are not shown in the figures, the reinforcing beam 1 may extend along the length direction of the battery box 10 to form the longitudinal beam of the battery box 10, and the battery cells 20 may be arranged on the left and right sides of the reinforcing beam 1.

[0063] In some embodiments of this utility model, the battery housing 10 can be applied to light trucks, and the battery housing 10 has the function of thermal runaway protection.

[0064] According to another embodiment of the present invention, the battery pack 100 includes the battery housing 10 of the above embodiment.

[0065] According to the embodiment of the present invention, the battery pack 100 has a beam body 11 of its reinforcing beam 1 having a first vent 112 and a second vent 113 that are staggered in the height direction. The vent valves 201 of the battery cells 20 on both sides of the beam body 11 are connected to the vent channel 111 of the beam body 11 through the first vent 112 and the second vent 113, respectively. When the battery cell 20 on one side of the beam body 11 experiences thermal runaway, the high-temperature and high-pressure gas generated by the battery cell 20 can be discharged into the vent channel 111. The staggered arrangement of the first vent 112 and the second vent 113 can prevent the gas discharged into the vent channel 111 from being directly discharged to the battery cell 20 on the other side of the beam body 11, which helps to reduce the risk of the battery cell 20 on the other side of the beam body 11 being heated, thereby helping to reduce safety risks.

[0066] In some embodiments of this utility model, the battery pack 100 can be used in a vehicle. When a single cell 20 in the battery pack 100 experiences thermal runaway, a jet containing harmful high-temperature and high-pressure fumes will be generated inside the cell 20. The jet can be discharged sequentially through the exhaust channel 111 and the connecting channel, which can disperse the heat accumulated during local thermal runaway and prevent the jet from accumulating inside the battery pack 100. This prevents the jet from heating the normally functioning cells 20 inside the battery pack 100, thereby effectively reducing the risk of fire or explosion of the battery pack 100 or battery system, reducing the risk of thermal runaway and delaying battery thermal runaway. This provides sufficient escape time for occupants in the vehicle, increasing safety and achieving a higher safety level. Furthermore, the exhaust channel 111 and the connecting channel allow the jet to flow along a preset path, ensuring unobstructed flow and rapid pressure relief, preventing the jet from affecting the components inside the battery pack 100.

[0067] Among them, reference Figure 3 As shown by the dashed arrow, when the cell 20 experiences thermal runaway, the ejected material generated inside the cell 20 can first be discharged through the exhaust valve 201 into the exhaust channel 111 of the reinforcing beam 1, and then flow through the exhaust channel 111 to the connecting beams 4 on the left and right sides. Subsequently, it flows through the connecting beams 4 on the left and right sides to the pressure relief valves 3 on the front and rear sides, and finally is discharged to the outside of the battery pack 100 through the pressure relief valves 3 on the front and rear sides.

[0068] A new energy vehicle according to another embodiment of the present invention includes the battery pack 100 of the above embodiment.

[0069] According to the embodiments of the present invention, the new energy vehicle has a beam body 11 of the reinforcing beam 1 with a first exhaust port 112 and a second exhaust port 113 that are staggered in the height direction. The exhaust valves 201 of the battery cells 20 on both sides of the beam body 11 are connected to the exhaust channel 111 of the beam body 11 through the first exhaust port 112 and the second exhaust port 113 respectively. When the battery cell 20 on one side of the beam body 11 experiences thermal runaway, the high temperature and high pressure gas generated by the battery cell 20 can be discharged into the exhaust channel 111. The staggered arrangement of the first exhaust port 112 and the second exhaust port 113 can prevent the gas discharged into the exhaust channel 111 from being directly discharged to the battery cell 20 on the other side of the beam body 11, which helps to reduce the risk of the battery cell 20 on the other side of the beam body 11 being heated, thereby helping to reduce safety risks.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A battery case characterized by comprising: The battery box body comprises a reinforcing beam (1), the reinforcing beam (1) comprises: a beam body (11), the beam body (11) defines an exhaust passage (111) extending along the length direction thereof; In the width direction of the beam body (11), a first exhaust hole (112) is formed on one side of the beam body (11), one end of the first exhaust hole (112) is adapted to be opposite and communicated with the exhaust valve (201) of the battery cell (20) on one side of the beam body (11), the other end of the first exhaust hole (112) is communicated with the exhaust passage (111), a second exhaust hole (113) is formed on the other side of the beam body (11), one end of the second exhaust hole (113) is adapted to be communicated with the exhaust valve (201) of the battery cell (20) on the other side of the beam body (11), the other end of the second exhaust hole (113) is communicated with the exhaust passage (111); In the height direction of the beam body (11), the first exhaust hole (112) and the second exhaust hole (113) are staggered.

2. The battery pack of claim 1, wherein The reinforcing beam (1) further comprises: a partition plate (12) arranged in the exhaust passage (111), the partition plate (12) divides the exhaust passage (111) into a first exhaust passage (1111) and a second exhaust passage (1112), the first exhaust hole (112) is communicated with the first exhaust passage (1111), and the second exhaust hole (113) is communicated with the second exhaust passage (1112).

3. The battery pack of claim 2, wherein, In the height direction of the beam body (11), the first exhaust passage (1111) and the second exhaust passage (1112) are arranged in an up-down manner.

4. The battery pack of claim 1, wherein, The number of the first exhaust holes (112) is multiple, and the multiple first exhaust holes (112) correspond one-to-one to the exhaust valves (201) of the multiple battery cells (20) on one side of the beam body (11); The number of the second exhaust holes (113) is multiple, and the multiple second exhaust holes (113) correspond one-to-one to the exhaust valves (201) of the multiple battery cells (20) on the other side of the beam body (11).

5. The battery pack of any one of claims 1-4, wherein, The battery box body further comprises: a box body (2), the box body (2) defines a battery cell accommodating cavity; a pressure relief valve (3) arranged in the box body (2) and communicated with the exhaust passage (111); wherein the reinforcing beam (1) is arranged in the battery cell accommodating cavity and fixedly connected with the box body (2).

6. The battery pack of claim 5, wherein, The number of the pressure relief valves (3) is multiple, and at least two of the multiple pressure relief valves (3) are arranged on opposite sides of the box body (2).

7. The battery pack of claim 5, wherein, The battery box body further comprises: a connecting beam (4) arranged in the battery cell accommodating cavity and fixedly connected with the box body (2) and the reinforcing beam (1) respectively, the connecting beam (4) defines a connecting passage, and the exhaust passage (111) is communicated with the pressure relief valve (3) through the connecting passage.

8. The battery pack of claim 5, wherein, The number of the reinforcing beams (1) is multiple, and the multiple reinforcing beams (1) are arranged at intervals.

9. A battery pack, characterized by, The battery pack according to claim 9.

10. A new energy vehicle, characterized in that, The battery pack according to claim 9.

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