Battery box and battery system

Abstract

The utility model provides a battery box and a battery system. The battery box comprises a box body and a pressure release valve, the first supporting piece and the second supporting piece are arranged in the box body in a spaced mode in the vertical direction, the first supporting piece and a bottom plate of the box body are spaced to form a first cavity, the first supporting piece is provided with a first mounting groove used for mounting a battery cell and communicated with the first cavity, and at least part of the pressure release valve is arranged on the box body and located in the first cavity; the second supporting piece is provided with a second cavity, and a second mounting groove which is used for mounting the battery cell and is communicated with the second cavity is formed in the second supporting piece; the first end of the communicating piece is communicated with the first cavity, and the second end of the communicating piece is communicated with the second cavity. According to the technical scheme provided by the utility model, the problem that the pressure relief of one layer of battery cell module in the power battery system in the prior art interferes with the use of other layers of battery cell modules can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, and in particular to a battery box and a battery system. Background Art

[0002] Currently, for cylindrical battery systems with only one layer of cells, the cavity formed by the cell support bracket and the lower case can be used to evacuate thermal runaway materials. The high-temperature, high-pressure gas generated by thermal runaway flows through the pressure relief system within the battery system and is ultimately discharged through a pressure relief valve installed on the lower case.

[0003] However, when the battery system includes two layers of battery cell modules, the battery cell modules in one layer often affect the use of the battery cells in the other layer when the pressure is released. Utility Model Content

[0004] The main purpose of the present invention is to provide a battery box and a battery system to solve the problem in the prior art that the pressure relief of one layer of battery modules in a power battery system may interfere with the use of battery modules in other layers.

[0005] In order to achieve the above object, according to one aspect of the present invention, a battery box is provided, comprising:

[0006] Tank and pressure relief valve;

[0007] A first support member and a second support member are arranged in a vertical direction in the box body, the first support member is spaced apart from the bottom plate of the box body to form a first cavity, the first support member is provided with a first mounting groove for mounting a battery cell and communicating with the first cavity, at least a portion of the pressure relief valve is provided on the box body and located in the first cavity; the second support member has a second cavity, and the second support member is provided with a second mounting groove for mounting a battery cell and communicating with the second cavity;

[0008] A connecting piece, wherein a first end of the connecting piece is connected to the first cavity, and a second end of the connecting piece is connected to the second cavity.

[0009] Furthermore, the first end of the connecting member is detachably connected to the first supporting member; and / or,

[0010] The second end of the connecting member is detachably connected to the second supporting member.

[0011] Furthermore, the connecting piece is a connecting pipe; wherein,

[0012] The first supporting member is provided with a first protruding tube communicating with the first cavity, and the first end of the connecting member is inserted into the first protruding tube; and / or,

[0013] The second supporting member is provided with a second convex tube communicating with the second cavity, and the second end of the connecting member is inserted into the second convex tube.

[0014] Furthermore, there are multiple connecting pieces;

[0015] wherein the plurality of connecting pieces are arranged at intervals; and / or,

[0016] The plurality of connecting members are all located on the same side of the second supporting member; and / or,

[0017] The connecting piece is a bent tube, and a bending gap of the bent tube is adapted to at least some of the components in the box body so as to avoid at least some of the components.

[0018] Furthermore, the battery box also includes:

[0019] A support column is provided on the first support member;

[0020] The second support member further includes a connecting portion, which is located on the side of the second cavity and is detachably connected to the support column.

[0021] Furthermore, a plurality of first reinforcing ribs spaced apart from each other are provided between the first support member and the bottom plate of the box body, and the plurality of first reinforcing ribs divide the first cavity into a plurality of interconnected first flow channels; and / or,

[0022] A plurality of second reinforcing ribs spaced apart in sequence are provided in the second cavity, and the plurality of second reinforcing ribs divide the second cavity into a plurality of interconnected second flow channels.

[0023] Furthermore, the second cavity has a plurality of second flow channels arranged in sequence at intervals; wherein, the second support member also has a plurality of pressure relief outlets arranged at intervals, the pressure relief outlets are arranged at the ends of the second flow channels, the pressure relief outlets are used to communicate with the connecting member, and the two second flow channels corresponding to two adjacent pressure relief outlets are separated by at least one second flow channel interval.

[0024] Furthermore, the second support member is located above a portion of the first support member, and an avoidance installation space is formed above another portion of the first support member; and / or,

[0025] A high-temperature resistant insulation layer is provided on the surface of the second support member.

[0026] Furthermore, a pressure relief channel is provided in the side plate of the box body, the pressure relief channel is communicated with the first cavity, the pressure relief valve is provided on the side plate, and the pressure relief valve is provided on the side of the pressure relief channel away from the first cavity.

[0027] According to another aspect of the present invention, a battery system is provided, comprising the battery box provided above.

[0028] Applying the technical solution of the present invention, the first support member and the second support member are spaced apart in the vertical direction to install two layers of battery cells in the battery box. The explosion-proof valve of the battery cell installed in the first installation slot is connected to the first cavity, and the explosion-proof valve of the battery cell installed in the second installation slot is connected to the second cavity. The first cavity and the second cavity are connected through a connecting piece. Therefore, when the two layers of battery cells need to be depressurized, the thermal runaway material in the second cavity can be directly introduced into the first cavity, and discharged from the box through the pressure relief valve when the pressure is too high. Therefore, when any layer of battery cell modules in the power battery system experiences thermal runaway, the thermal runaway material can be discharged from the cavity through the first cavity and the pressure relief valve, thereby preventing the pressure relief of one layer of battery cells from interfering with the use of battery cell modules in other layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 A schematic structural diagram of a battery box according to an embodiment of the present utility model is shown;

[0031] Figure 2 A schematic structural diagram of a second support member of a battery box according to an embodiment of the present invention is shown;

[0032] Figure 3 Shown Figure 2 The local structural cross-sectional view at AA in FIG;

[0033] Figure 4 A schematic structural diagram of the second support member of the battery box according to an embodiment of the present invention is shown at another angle;

[0034] Figure 5 A partial assembly diagram of a battery box provided according to an embodiment of the present utility model is shown;

[0035] Figure 6 A partial structural cross-sectional view of a battery box with battery cells installed therein according to an embodiment of the present utility model is shown;

[0036] Figure 7 A partial structural cross-sectional view of a battery box provided according to an embodiment of the present utility model is shown.

[0037] The above drawings include the following reference numerals:

[0038] 10. Box body; 11. First cavity; 12. Pressure relief valve; 13. Pressure relief channel; 14. Pressure relief outlet;

[0039] 20. First support member; 21. First protruding tube; 22. First mounting groove;

[0040] 30. Second support member; 31. Second cavity; 32. Second mounting groove; 33. Second protruding tube; 34. Second reinforcing rib; 35. Connecting portion; 351. Connecting hole;

[0041] 40. Connecting piece; 50. Support column; 60. Battery cell; 70. Screw. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] like Figures 1 to 7 As shown, one embodiment of the present invention provides a battery box, which includes a box body 10, a pressure relief valve 12, a first support member 20, a second support member 30, and a connecting member 40. The first support member 20 and the second support member 30 are arranged in the box body 10 in a vertical direction. The first support member 20 is spaced apart from the bottom plate of the box body 10 to form a first cavity 11. The first support member 20 is provided with a first mounting groove 22 for mounting a battery cell 60 and communicating with the first cavity 11. At least a portion of the pressure relief valve 12 is provided on the box body 10 and located in the first cavity 11. The second support member 30 has a second cavity 31. The second support member 30 is provided with a second mounting groove 32 for mounting a battery cell 60 and communicating with the second cavity 31. The first end of the connecting member 40 is in communication with the first cavity 11, and the second end of the connecting member 40 is in communication with the second cavity 31.

[0044] In the battery case provided by this embodiment, the first support member 20 and the second support member 30 are spaced apart in the vertical direction to accommodate upper and lower layers of battery cells 60 within the battery case. The explosion-proof valves of the battery cells 60 disposed in the first mounting slots 22 communicate with the first cavity 11, while the explosion-proof valves of the battery cells 60 disposed in the second mounting slots 32 communicate with the second cavity 31. The first and second cavities 11 and 31 are connected via a connecting member 40. This allows the thermal runaway substances in the second cavity 31 to be directly introduced into the first cavity 11 when the battery cells 60 disposed in the upper layer need to be depressurized. When the pressure is too high, the substances can be discharged from the case 10 through the pressure relief valve 12. Consequently, if thermal runaway occurs in any layer of battery cell 60 modules in the power battery system, the substances can be discharged from the cavity through the first cavity 11 and the pressure relief valve 12, thereby preventing the depressurization of one layer of battery cells 60 from interfering with the use of battery cell modules in other layers.

[0045] Specifically, the first support member 20 and the box body 10 are integrally formed.

[0046] Specifically, the battery cell 60 is inserted into the first installation groove 22 or the second installation groove 32 , and an explosion-proof valve is provided at the bottom of the battery cell 60 .

[0047] Specifically, the second support member 30 may be made of an alloy material, and the second cavity 31 in the second support member 30 may be formed by extrusion.

[0048] In this embodiment, a high-temperature-resistant insulation layer is provided on the surface of the second support member 30 to reduce heat transfer during thermal runaway. Specifically, when thermal runaway occurs in the battery cell 60 on the first support member 20, heat is prevented from transferring to the second support member 30. Similarly, when thermal runaway occurs in the battery cell 60 on the second support member 30, heat is prevented from transferring to the first support member 20 via the second support member 30. It should be noted that the high temperature in the high-temperature-resistant range primarily corresponds to the temperature range typically encountered by the battery cell 60 during thermal runaway.

[0049] Specifically, a high-temperature resistant insulating material can be sprayed on the outer surface of the second support member 30 to form a high-temperature resistant insulating layer, thereby reducing heat transfer when the battery cell 60 on the second support member 30 undergoes thermal runaway, thereby avoiding causing large losses to other components inside the battery box, ensuring the integrity of the internal structure of the battery box, and improving the safety of the entire battery box during use.

[0050] In this embodiment, the first end of the connecting member 40 is detachably connected to the first support member 20, and the second end of the connecting member 40 is detachably connected to the second support member 30. This facilitates removal of the connecting member 40 when the second support member 30 and the battery cells 60 thereon are no longer needed, and prevents interference with the removal of the second support member 30. Furthermore, a modular design is achieved, allowing for prompt replacement of the damaged components of the first support member 20, the second support member 30, or the connecting member 40 if they become damaged.

[0051] In this embodiment, the connecting member 40 is a connecting tube. The first support member 20 is provided with a first protruding tube 21 that communicates with the first cavity 11. The first end of the connecting member 40 is inserted into the first protruding tube 21. The second support member 30 is provided with a second protruding tube 33 that communicates with the second cavity 31. The second end of the connecting member 40 is inserted into the second protruding tube 33. This makes the connecting member 40 easy and convenient to install and quickly remove. Furthermore, the connecting member 40 can stably connect the first cavity 11 and the second cavity 31.

[0052] In this embodiment, there are multiple connecting pieces 40, which are spaced apart. This improves the efficiency of discharging thermal runaway substances from the second cavity 31 by providing multiple connecting pieces 40, preventing the battery cells 60 on the second support member 30 from being discharged in a timely manner when thermal runaway occurs. This ensures the pressure relief effect of the second cavity 31 and the safety of the battery box during use.

[0053] In this embodiment, the multiple connecting pieces 40 are all located on the same side of the second support member 30. This prevents the multiple connecting pieces 40 from interfering with other structures within the housing 10, effectively optimizing the layout of the interior space of the housing 10 and ensuring the utilization of the interior space of the housing 10. Specifically, the other structures may be wires, a control panel, and the like.

[0054] In this embodiment, the connecting piece 40 is a bent tube, and the bending gap of the bent tube is adapted to at least some components within the box body 10 to avoid at least some components. This allows the connecting piece 40 to stably connect the first cavity 11 and the second cavity 31, while preventing the connecting piece 40 from interfering with the installation of the battery cell 60 or other structures, thereby optimizing the internal space structure layout.

[0055] In this embodiment, the battery case further includes a support column 50, which is disposed on the first support member 20. The second support member 30 further includes a connecting portion 35, which is located on the side of the second cavity 31 and is detachably connected to the support column 50. This allows the second support member 30 to be installed and removed via the support column 50 and the connecting portion 35, facilitating its timely removal if damaged or no longer required. Alternatively, the second support member 30 can be installed when a double-layer battery cell 60 is required.

[0056] Specifically, a connection hole 351 is provided on the connection portion 35 , and the connection portion 35 and the support column 50 are connected via a screw 70 . Specifically, the screw 70 passes through the connection hole 351 and is threadedly connected to the support column 50 .

[0057] In this embodiment, a plurality of first reinforcing ribs are disposed sequentially between the first support member 20 and the bottom plate of the housing 10. These first reinforcing ribs divide the first cavity 11 into a plurality of interconnected first flow channels. Thus, the first reinforcing ribs support the first support member 20, preventing deformation of the first support member 20 after the battery cells 60 are placed thereon, thereby ensuring the structural strength of the first support member 20. Furthermore, the plurality of first reinforcing ribs divide the first cavity 11 into a plurality of interconnected first flow channels, controlling the flow direction of thermal runaway substances and preventing them from diffusing excessively and rapidly within the first cavity 11. This, in turn, reduces the impact of a battery cell 60 experiencing thermal runaway on other battery cells 60 on the same layer.

[0058] Specifically, the “multiple first reinforcing ribs spaced apart in sequence” here can be understood as multiple first reinforcing ribs spaced apart along a preset direction.

[0059] Specifically, the first mounting slot 22 includes a plurality of through-holes, and the top of each first flow channel is provided with a row of through-holes connected to the first flow channel. Preferably, the explosion-proof valves of the multiple battery cells are respectively arranged toward the plurality of through-holes, with the explosion-proof valve of each battery cell being arranged toward a corresponding through-hole.

[0060] In this embodiment, multiple second reinforcing ribs 34 are provided in a sequentially spaced relationship within the second cavity 31. These ribs divide the second cavity 31 into multiple interconnected second flow channels. This allows the first reinforcing ribs to support the first support member 20, preventing deformation of the second support member 30 after the battery cells 60 are placed thereon, thereby ensuring the structural strength of the second support member 30. Furthermore, the multiple second reinforcing ribs 34 divide the second cavity 31 into multiple interconnected second flow channels, controlling the flow of thermal runaway substances and preventing them from diffusing excessively and rapidly within the second cavity 31. This reduces the impact of a battery cell 60 experiencing thermal runaway on other battery cells 60 on the same layer.

[0061] Specifically, the “multiple second reinforcing ribs spaced apart in sequence” here can be understood as a plurality of second reinforcing ribs spaced apart along a preset direction.

[0062] Specifically, the second mounting slot 32 includes a plurality of through-holes, and each second flow channel is provided with a row of through-holes at the top thereof that communicate with the second flow channel. Preferably, the explosion-proof valves of the plurality of battery cells are respectively arranged toward the plurality of through-holes, with the explosion-proof valve of each battery cell being arranged toward a corresponding through-hole.

[0063] In this embodiment, the second support member 30 further includes a plurality of spaced-apart pressure relief outlets 14 disposed at the ends of the second flow channel. These outlets 14 are configured to communicate with the connecting member 40, with at least one second flow channel interval separating the corresponding second flow channels of two adjacent pressure relief outlets 14. This reduces the number of pressure relief outlets 14 while ensuring the pressure relief effect of the second cavity 31, thereby reducing the number of openings in the second support member 30 and improving the structural strength of the second support member 30.

[0064] Specifically, in this embodiment, the number of the pressure relief outlets 14 can be set to be smaller than the number of the second flow channels, and one pressure relief outlet 14 can be arranged correspondingly to one second flow channel.

[0065] In this embodiment, the second support member 30 is located above a portion of the first support member 20, and an escape installation space is formed above another portion of the first support member 20. This structural arrangement can effectively improve space utilization and optimize the compactness of the spatial structure layout. Specifically, the escape space can form part of the internal space of the box body 10 to facilitate the installation of structures such as the power transmission lines of the battery box. Alternatively, the escape space can be the external space of the box body 10 to make room for other components outside the battery box, thereby improving the installation compactness of the battery box and other components located outside the battery box, and optimizing the spatial structure layout of the battery box and other components located outside the battery box.

[0066] In this embodiment, a pressure relief channel 13 is provided in the side panel of the housing 10. The pressure relief channel 13 is connected to the first cavity 11. A pressure relief valve 12 is provided on the side panel, and the pressure relief valve 12 is provided on the side of the pressure relief channel 13 away from the first cavity 11. In this way, thermal runaway materials in the first cavity 11 can be discharged through the separately provided pressure relief channel 13, preventing the accumulation of thermal runaway materials in the first cavity 11. This can prevent a certain battery cell 60 from affecting other battery cells 60 during thermal runaway. In other words, it can prevent high-temperature and high-pressure gas from accumulating and staying inside the battery system and heating other battery cells 60, thereby reducing the risk of heat spread in the battery system. In addition, the space in the side panel of the housing 10 can be effectively utilized to dissipate the heat of the housing 10 in a timely manner.

[0067] Another embodiment of the present invention provides a battery system, including the battery box provided in the above embodiment.

[0068] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: when thermal runaway occurs in the battery cell 60 in any layer of the battery cell module in the power battery system, the thermal runaway material can be discharged from the cavity through the first cavity 11 and the pressure relief valve 12, thereby avoiding the pressure relief of one layer of the battery cell 60 from interfering with the use of the battery cells 60 in the battery cell modules of other layers.

[0069] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0070] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0071] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0072] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0073] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery box, characterized in that: include: A housing (10) and a pressure relief valve (12); A first support member (20) and a second support member (30) are arranged in a vertical direction at intervals in the box body (10); the first support member (20) is spaced from the bottom plate of the box body (10) to form a first cavity (11); the first support member (20) is provided with a first mounting groove (22) for mounting a battery cell (60) and communicating with the first cavity (11); at least a portion of the pressure relief valve (12) is arranged on the box body (10) and is located in the first cavity (11); the second support member (30) has a second cavity (31); the second support member (30) is provided with a second mounting groove (32) for mounting a battery cell (60) and communicating with the second cavity (31); A connecting piece (40), wherein a first end of the connecting piece (40) is connected to the first cavity (11), and a second end of the connecting piece (40) is connected to the second cavity (31).

2. The battery box according to claim 1, characterized in that: The first end of the connecting member (40) is detachably connected to the first supporting member (20); and / or, The second end of the connecting member (40) is detachably connected to the second supporting member (30).

3. The battery box according to claim 1, characterized in that: The connecting piece (40) is a connecting pipe; wherein, The first supporting member (20) is provided with a first protruding tube (21) communicating with the first cavity (11), and the first end of the connecting member (40) is inserted into the first protruding tube (21); and / or, The second supporting member (30) is provided with a second convex tube (33) communicating with the second cavity (31), and the second end of the connecting member (40) is inserted into the second convex tube (33).

4. The battery box according to claim 1, characterized in that: There are multiple connecting pieces (40); wherein a plurality of the connecting members (40) are arranged at intervals; and / or, The plurality of connecting members (40) are all located on the same side of the second supporting member (30); and / or, The connecting piece (40) is a bent tube, and the bending gap of the bent tube is adapted to at least some of the components in the box (10) so as to avoid at least some of the components.

5. The battery box according to claim 1, characterized in that: The battery box also includes: A support column (50) is provided on the first support member (20); The second support member (30) further comprises a connecting portion (35), the connecting portion (35) is located on the side of the second cavity (31), and the connecting portion (35) is detachably connected to the support column (50).

6. The battery box according to claim 1, characterized in that: A plurality of first reinforcing ribs spaced sequentially are provided between the first support member (20) and the bottom plate of the box body (10), and the plurality of first reinforcing ribs divide the first cavity (11) into a plurality of interconnected first flow channels; and / or, A plurality of second reinforcing ribs (34) spaced apart in sequence are provided in the second cavity (31), and the plurality of second reinforcing ribs (34) divide the second cavity (31) into a plurality of communicating second flow channels.

7. The battery box according to claim 1, characterized in that: The second cavity (31) has a plurality of second flow channels arranged in sequence at intervals; wherein the second support member (30) also has a plurality of pressure relief outlets (14) arranged at intervals, the pressure relief outlets (14) being arranged at the ends of the second flow channels, and the two second flow channels corresponding to two adjacent pressure relief outlets (14) are spaced apart by at least one interval of the second flow channel.

8. The battery box according to claim 1, characterized in that: The second support member (30) is located above a portion of the first support member (20), and an avoidance installation space is formed above another portion of the first support member (20); and / or, The surface of the second support member (30) is provided with a high-temperature resistant insulation layer.

9. The battery box according to claim 1, characterized in that: A pressure relief channel (13) is provided in the side plate of the box body (10), the pressure relief channel (13) is communicated with the first cavity (11), the pressure relief valve (12) is provided on the side plate, and the pressure relief valve (12) is provided on a side of the pressure relief channel (13) away from the first cavity (11).

10. A battery system, characterized in that: A battery box comprising the battery box according to any one of claims 1 to 9.

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