Battery box and battery

Abstract

This invention discloses a battery housing and a battery, belonging to the field of battery technology. The battery housing includes a main housing and a retaining member; wherein, the main housing is provided with a pressure relief hole, which is correspondingly arranged with the battery cell, and a pressure relief cavity is formed on the inner side of the bottom end of the main housing, which communicates with the pressure relief hole, and a first explosion-proof valve of the battery cell is arranged near the pressure relief hole; the retaining member is arranged on the end of the pressure relief hole near the pressure relief cavity, when the first explosion-proof valve is opened and the central column of the battery cell is ejected into the pressure relief hole, one end of the central column can abut against the retaining member, so that the other end of the central column is not electrically connected to the adjacent battery cell. The battery housing of this invention can prevent the central column ejected by the battery cell in the event of thermal runaway from forming an electrical connection with the adjacent battery cell, thereby playing a role in thermal runaway protection.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to battery housings and batteries. Background Technology

[0002] Multiple pressure relief holes are provided on the battery box. The battery cells placed inside the battery box are arranged one-to-one with the pressure relief holes, and the explosion-proof valve of the battery cell is located near the pressure relief hole. When the battery cell experiences thermal runaway, the explosion-proof valve is opened so that the gas generated by the thermal runaway of the battery cell can be discharged through the pressure relief hole via the explosion-proof valve.

[0003] However, after the explosion-proof valve is opened, the central column at the center of the battery cell may be ejected. That is, after the central column is ejected, it will pass through the pressure relief hole and impact the bottom of the battery box. The instantaneous impact force will cause the central column to bounce back and shake in the pressure relief hole until it comes into contact with the adjacent battery cell. At this time, the explosion-proof valve of the adjacent battery cell is also in the open state. It is easy for the central column to come into contact with the inside of the battery cell through the valve port of the explosion-proof valve of the adjacent battery cell. This will cause an electrical connection between the central column and the adjacent battery cell, resulting in a partial short circuit. This will cause thermal runaway to spread further and fail to play its role in thermal runaway protection, which can easily lead to a safety accident. Summary of the Invention

[0004] One object of the present invention is to provide a battery housing that prevents the central column ejected from the battery cell during thermal runaway from forming an electrical connection with adjacent battery cells, thereby providing thermal runaway protection.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery housing includes a main housing with a pressure relief hole, the pressure relief hole being correspondingly positioned to the battery cell. A pressure relief cavity is formed on the inner side of the bottom end of the main housing, the pressure relief cavity communicating with the pressure relief hole. A first explosion-proof valve for the battery cell is positioned near the pressure relief hole. The battery housing also includes:

[0007] A stopper is provided on one end of the pressure relief hole near the pressure relief chamber. When the first explosion-proof valve is opened and the central column of the battery cell is ejected into the pressure relief hole, one end of the central column can abut against the stopper so that the other end of the central column is not electrically connected to the adjacent battery cell.

[0008] Furthermore, the main housing has a first cavity and a second cavity spaced apart. The pressure relief hole and the pressure relief cavity are both located in the first cavity. The first cavity is used to place the battery cell, and the second cavity is used to place the electrical components.

[0009] Furthermore, the main housing includes:

[0010] The housing body has a pressure relief hole located on the bottom end face of the housing body, and the inner side of the housing body forms the first cavity and the second cavity at intervals.

[0011] A protective component is disposed below the pressure relief hole so that the pressure relief cavity is formed between the bottom end face of the housing body and the top end face of the protective component.

[0012] Furthermore, when the battery cell is fixed to the first cavity with expanding foam, the top surface of the housing body is higher than the top surface of the expanding foam.

[0013] Furthermore, the box body is a one-piece molded structure.

[0014] Furthermore, the blocking member includes:

[0015] Multiple arc-shaped guide ribs are arranged circumferentially along the pressure relief hole on the housing body to resist the central column.

[0016] Furthermore, at least a first interval and a second interval are formed between the plurality of arc-shaped guide ribs, and the first interval is larger than the second interval. The first interval is the main pressure relief port, and the second interval is the auxiliary pressure relief port.

[0017] Furthermore, the first interval and the second interval are respectively provided corresponding to any one of the arc-shaped guide ribs of the adjacent pressure relief hole.

[0018] Furthermore, the bottom end face of the arc-shaped guide rib abuts against the protective component.

[0019] Furthermore, a gap is formed between the bottom end face of the arc-shaped guide rib and the protective component.

[0020] Furthermore, the housing body is provided with a water inlet, a water outlet, a mounting panel for installing the electrical components, and a mounting surface for installing a second explosion-proof valve, the second explosion-proof valve being able to release pressure from the pressure relief chamber.

[0021] Furthermore, an arched reinforcing rib is provided on the long side plate of the box body, and the arched reinforcing rib extends in an arc shape along the length direction of the box body.

[0022] Another objective of this invention is to provide a battery that can prevent further spread of thermal runaway and reduce safety accidents.

[0023] To achieve this objective, the present invention adopts the following technical solution:

[0024] The battery includes a battery housing as described above and a plurality of said cells arranged in an array within the battery housing.

[0025] The beneficial effects of this invention are as follows:

[0026] By aligning the pressure relief holes on the main housing with the battery cells, a pressure relief chamber communicating with the pressure relief holes is formed on the inner side of the bottom of the main housing. The first explosion-proof valve of the battery cell is positioned close to the pressure relief hole, and a stopper is positioned on the pressure relief hole near the pressure relief chamber. When the battery cell experiences thermal runaway, and the central column of the battery cell is ejected into the pressure relief hole through the first explosion-proof valve, one end of the central column can abut against the stopper, so that the stopper provides a blocking effect on the central column. This prevents the other end of the central column from being electrically connected to adjacent battery cells, avoiding the formation of a local short circuit between the central column and adjacent battery cells, thus preventing the further spread of thermal runaway and providing thermal runaway protection.

[0027] The battery of the present invention, by including the aforementioned battery housing, can prevent the cell from affecting adjacent cells when thermal runaway occurs in the cell, thereby preventing further spread of thermal runaway and reducing safety accidents. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the battery box and battery cell provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the battery box structure provided by the present invention;

[0030] Figure 3 This is an exploded view of the battery housing provided by the present invention;

[0031] Figure 4 This is a top view of the battery housing provided by the present invention;

[0032] Figure 5 This is a cross-sectional view of the battery box provided by the present invention;

[0033] Figure 6 yes Figure 5 A magnified view of a portion of point D in the middle;

[0034] Figure 7 This is a schematic diagram of the rear structure of the box body provided by the present invention;

[0035] Figure 8 yes Figure 7 A magnified view of a portion of point A in the middle;

[0036] Figure 9 This is a side view of the back of the housing body provided by the present invention;

[0037] Figure 10 yes Figure 9 A magnified view of a portion of point B in the middle;

[0038] Figure 11This is a schematic diagram of the structure of the long side plate provided by the present invention;

[0039] Figure 12 This is a side view of the box body provided by the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Main tank; 11-Tank body; 111-Pressure relief hole; 112-Mounting surface; 113-Gathering port; 114-Inlet; 115-Outlet; 116-Long side plate; 12-Protective component; 121-Mica sheet; 122-Bottom guard plate; 13-Pressure relief chamber; 14-First chamber; 15-Second chamber; 16-Blood baffle; 17-Arch-shaped reinforcing rib; 18-Strip-shaped reinforcing rib;

[0042] 2-Battery cell;

[0043] 3-Blocking component; 31-Arc-shaped guide rib; 311-Transition fillet; 32-Main pressure relief port; 33-Auxiliary pressure relief port. Detailed Implementation

[0044] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0045] Any feature disclosed in this specification, unless specifically stated otherwise, may be replaced by other equivalent or similar features. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features. Throughout this specification, the same reference numerals indicate the same elements.

[0046] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0047] This embodiment proposes a battery housing and a battery including the battery housing. The battery also includes multiple battery cells arranged in an array within the battery housing. The battery housing ensures that the individual battery cells will not affect each other in the event of thermal runaway, thus providing thermal runaway protection and reducing safety accidents. In this embodiment, the battery cell is specifically a cylindrical cell, which includes a central post located in the middle, and the central post is the core structure of the battery cell.

[0048] Specifically, such as Figures 1 to 6As shown, the battery casing includes a main casing 1, on which several pressure relief holes 111 are provided. Each pressure relief hole 111 corresponds to one battery cell 2, and a pressure relief chamber 13 is formed on the inner side of the bottom end of the main casing 1. The pressure relief chamber 13 is connected to the pressure relief holes 111. The first explosion-proof valve of the battery cell 2 is located near the pressure relief hole 111. When the battery cell 2 experiences thermal runaway, the first explosion-proof valve is opened, allowing the gas generated by the thermal runaway of the battery cell 2 to be discharged into the pressure relief chamber 13 through the first explosion-proof valve and the pressure relief hole 111. This ensures the safety of the battery cell 2 and prevents safety accidents caused by the inability to discharge the gas generated during the thermal runaway of the battery cell 2 in a timely manner. The specific discharge path of the thermal runaway gas in the main casing 1 is as follows: Figure 5 As shown by arrow F in the diagram.

[0049] Furthermore, such as Figure 1 , Figure 7 and Figure 8 As shown, the battery housing also includes a stopper 3, which is disposed on the pressure relief hole 111 at one end near the pressure relief chamber 13. When the first explosion-proof valve is opened and the central column of the battery cell 2 is ejected, the central column can pass through the pressure relief hole 111 and bounce upward, so that the central column can circumferentially shake within the pressure relief hole 111. During the shaking process, one end of the central column can directly abut against the stopper 3, thereby preventing the central column from shaking further, and thus ensuring that the other end of the central column is not electrically connected to the adjacent battery cell 2.

[0050] In this embodiment, the battery housing has an added stopper 3 at the pressure relief hole 111 compared to the prior art. This stopper 3 can block the central column when it shakes circumferentially, thereby preventing the central column from shaking further. This also prevents the other end of the central column from being electrically connected to the adjacent cell 2, avoiding the formation of a local short circuit between the central column and the adjacent cell 2. This helps to prevent the further spread of thermal runaway and thus plays a role in thermal runaway protection.

[0051] It is worth noting that, since there is a certain distance between adjacent battery cells 2, and since the first explosion-proof valve is located on the bottom surface of battery cell 2, the ejected central column can only form an electrical connection with the adjacent battery cell 2 at the valve port of the first explosion-proof valve that abuts against the bottom surface of the adjacent battery cell 2. Therefore, when the central column has some shaking in the pressure relief hole 111 but has not yet abutted against the stop 3, the central column will usually only abut against the non-bottom surface of the adjacent battery cell 2, that is, at this time, the central column will not form an electrical connection with the adjacent battery cell 2.

[0052] Furthermore, such as Figure 1 and Figure 2As shown, a first cavity 14 and a second cavity 15 are formed at intervals on the inner side of the main housing 1. The pressure relief hole 111 and the pressure relief chamber 13 are both located in the first cavity 14. The first cavity 14 is used to place the battery cell 2, and the second cavity 15 is used to place the battery's electrical components. Specifically, the electrical components can be the battery's connecting wires, which are not limited here.

[0053] By forming a first cavity 14 and a second cavity 15 spaced apart, the battery cell 2 and the electrical components can be placed separately to avoid mutual interference. On the other hand, when foam adhesive is applied in the first cavity 14 to fix the battery cell 2 in the first cavity 14, the foam adhesive in the first cavity 14 is prevented from flowing into the second cavity 15, thereby preventing the foam adhesive from sticking the electrical components together, which makes the disassembly and maintenance of the electrical components simpler and more convenient.

[0054] Specifically, such as Figure 2 and Figure 3 As shown, the main housing 1 includes a housing body 11 and a protective member 12; wherein, a pressure relief hole 111 is provided through the bottom end face of the housing body 11, and a first cavity 14 and a second cavity 15 are formed at intervals on the inner side of the housing body 11, that is, a baffle plate 16 is provided on the inner side of the housing body 11 to divide the inner side of the housing body 11 into the first cavity 14 and the second cavity 15; the protective member 12 is provided below the pressure relief hole 111 so that a pressure relief cavity 13 is formed between the bottom end face of the housing body 11 and the top end face of the protective member 12.

[0055] By setting the protective component 12, on the one hand, a closed space can be formed between the housing body 11 and the protective component 12, that is, the closed space is the pressure relief chamber 13; on the other hand, the protective component 12 can increase the support strength of the first cavity 14, ensuring the stability of the battery cell 2 when it is installed and used in the first cavity 14; and the protective component 12 can also withstand the impact force of the central column and the thermal runaway gas when the battery cell 2 experiences thermal runaway.

[0056] Specifically, such as Figure 3 As shown, the protective component 12 includes a mica sheet 121 and a bottom protective plate 122. After cleaning the bottom protective plate 122, the mica sheet 121 is directly attached to the bottom protective plate 122 using adhesive. Then, the bottom protective plate 122 is welded to the bottom end face of the first cavity 14 of the housing body 11. At this time, the mica sheet 121 is located between the bottom protective plate 122 and the pressure relief hole 111; that is, a pressure relief cavity 13 is formed between the bottom protective plate 122 and the housing body 11, and the mica sheet 121 is located inside the pressure relief cavity 13. In this embodiment, the bottom protective plate 122 is welded to the housing body 11 by friction stir welding.

[0057] By welding, the sealing between the bottom protective plate 122 and the housing body 11 can be ensured, thereby ensuring good airtightness of the pressure relief chamber 13. Furthermore, since the mica sheet 121 has high temperature resistance and fireproof function, when the battery cell 2 experiences thermal runaway, the mica sheet 121 can block the heat transfer to the bottom protective plate 122, and at the same time prevent the problem of fire in the pressure relief chamber 13, so as to ensure high safety in the use of the battery cell 2.

[0058] Furthermore, such as Figure 1 As shown, when the battery cell 2 is fixed inside the first cavity 14 with expanding foam, the top surface of the housing body 11 is higher than the height of the expanded foam, thus ensuring that the expanding foam does not overflow to the outside of the housing body 11. This allows the housing body 11 to restrict the expanding foam in five degrees of freedom. Specifically, to facilitate fixing the battery cell 2, the height of the expanded foam needs to be slightly lower than the height of the battery cell 2.

[0059] By making the top surface of the housing body 11 higher than the top surface of the foam adhesive, the first cavity 14 can provide a restrictive effect on the foam adhesive, preventing the foam adhesive from flowing to the outside of the first cavity 14, simplifying the bonding process of the foam adhesive to the battery cell 2, and eliminating the need for additional tooling to restrict the flow of the foam adhesive.

[0060] Furthermore, such as Figure 1 , Figure 7 and Figure 8 As shown, the blocking component 3 includes multiple arc-shaped guide ribs 31, which are arranged circumferentially on the box body 11 along the pressure relief hole 111. The arc-shaped guide ribs 31 can block the central column.

[0061] Specifically, such as Figure 1 , Figure 7 and Figure 8 As shown, the arc-shaped guide rib 31 is disposed on the bottom end face of the first cavity 14 on the housing body 11. The arc-shaped guide rib 31 extends towards the mica sheet 121 of the protective member 12, that is, the arc-shaped guide rib 31 is located in the pressure relief cavity 13, and the inner side of the arc-shaped guide rib 31 is flush with the inner wall surface of the pressure relief hole 111. By setting the arc-shaped guide rib 31, on the one hand, the supporting strength of the first cavity 14 can be increased, and the stability of the battery cell 2 during installation and use in the first cavity 14 can be better guaranteed; on the other hand, the arc-shaped guide rib 31 can provide a larger contact area, so that the arc-shaped guide rib 31 can better block the central column.

[0062] Specifically, such as Figure 9 and Figure 10As shown, at a pressure relief hole 111, multiple arc-shaped guide ribs 31 are spaced apart, and at least a first interval and a second interval are formed between the multiple arc-shaped guide ribs 31, and the first interval is larger than the second interval, so that the first interval is the main pressure relief port 32 and the second interval is the auxiliary pressure relief port 33.

[0063] By forming a main pressure relief port 32 and an auxiliary pressure relief port 33 at a pressure relief hole 111, on the one hand, most of the gas or solid residue from the thermal runaway of the battery cell 2 can be discharged from the main pressure relief port 32 into the pressure relief chamber 13, avoiding the problem of blockage at the main pressure relief port 32; on the other hand, the auxiliary pressure relief port 33 can assist in the discharge of the thermal runaway gas into the pressure relief chamber 13, thereby ensuring a better exhaust effect so that the thermal runaway gas from the battery cell 2 can be smoothly discharged into the pressure relief chamber 13.

[0064] In this embodiment, as Figure 8 and Figure 10 As shown, three arc-shaped guide ribs 31 are provided at a pressure relief hole 111. The three arc-shaped guide ribs 31 can form two auxiliary pressure relief ports 33 and one main pressure relief port 32. On the one hand, it can avoid the problem of having too many arc-shaped guide ribs 31, which would make the first interval and the second interval too small, and thus fail to ensure that the gas can be smoothly discharged into the pressure relief chamber 13. On the other hand, it can avoid the problem of having too few arc-shaped guide ribs 31, which would fail to ensure the blocking effect of the arc-shaped guide ribs 31 on the central column.

[0065] Furthermore, such as Figure 8 and Figure 10 As shown, the first interval and the second interval are respectively set to correspond to any one of the arc-shaped guide ribs 31 of the adjacent pressure relief hole 111. That is to say, at the adjacent pressure relief hole 111, there is an arc-shaped guide rib 31 located at the first interval or the second interval.

[0066] By setting the arc-shaped guide ribs 31 of adjacent pressure relief holes 111 to correspond with the first and second intervals, when the central column circumferentially shakes to the first or second interval, the arc-shaped guide ribs 31 at the adjacent pressure relief holes 111 can provide a blocking effect on the central column, thereby preventing the central column from shaking further. This also ensures that the other end of the central column is not electrically connected to the adjacent battery cell 2. This allows the setting of the first and second intervals to ensure that the blocking effect on the central column is not affected while the thermal runaway gas is discharged. In this way, it can be ensured that the adjacent battery cells 2 will not affect each other during thermal runaway.

[0067] Furthermore, such as Figure 8As shown, the bottom end face of the arc-shaped guide rib 31 and the two oppositely arranged side faces are both formed with transition fillets 311. When the central column abuts against the arc-shaped guide rib 31 at the pressure relief hole 111 or the adjacent pressure relief hole 111, the transition fillets 311 can provide a buffering effect, so as to avoid damage to the central column and cause safety accidents when the arc-shaped guide rib 31 provides a blocking effect on the central column, and ensure stable protection against thermal runaway.

[0068] Specifically, the bottom end face of the arc-shaped guide rib 31 abuts against the mica sheet 121 of the protective component 12, so that the length of the arc-shaped guide rib 31 is relatively long, thereby enabling the arc-shaped guide rib 31 to have a better blocking effect on the central column, and better ensuring that the central column will not abut against the valve port of the first explosion-proof valve of the adjacent battery cell 2; at this time, the thermal runaway gas of the battery cell 2 can only be discharged into the pressure relief chamber 13 through the main pressure relief port 32 and the auxiliary pressure relief port 33.

[0069] In other embodiments, a gap can be formed between the bottom end face of the arc-shaped guide rib 31 and the protective member 12, so that the thermal runaway gas of the battery cell 2 can not only be discharged from the main pressure relief port 32 and the auxiliary pressure relief port 33 into the pressure relief chamber 13, but also enter the pressure relief chamber 13 through the formed gap, so as to ensure a better gas discharge effect.

[0070] Furthermore, such as Figure 2 and Figure 11 As shown, arched reinforcing ribs 17 are provided on the long side plates 116 of the box body 11, and the arched reinforcing ribs 17 extend in an arc shape along the length direction of the box body 11. In this embodiment, arched reinforcing ribs 17 are provided on both long side plates 116 that are arranged opposite to each other on the box body 11.

[0071] By setting arched reinforcing ribs 17, the compressive strength of the long side plate 116 and the box body 11 in the height direction of the box body 11 can be improved, and the box body 11 has a higher resistance to breakage in the height direction, which is conducive to the flexible placement of the box body 11 and the battery box.

[0072] Specifically, because the long side plate 116 is relatively long, its compressive strength is weakest at the center position. Therefore, as Figure 2 and Figure 11 As shown, in this embodiment, the arched reinforcing rib 17 is located at the center of the long side plate 116, which can improve the compressive strength at the center of the long side plate 116. In addition, strip reinforcing ribs 18 are provided at other locations of the long side plate 116, which can ensure the compressive strength of the entire long side plate 116 in the height direction of the box body 11.

[0073] Furthermore, such as Figure 9 and Figure 12As shown, the main body 11 of the enclosure is provided with a water inlet 114, a water outlet 115, a mounting panel for installing electrical components, and a mounting surface 112 for installing a second explosion-proof valve. The water inlet 114 and water outlet 115 are used to connect to the liquid cooling component of the battery cell 2 to cool the battery cell 2. The mounting panel is located inside the second cavity 15 to mount various electrical components, facilitating the installation and management of the components. The second explosion-proof valve can release pressure from the pressure relief chamber 13. The liquid cooling component can use the existing liquid cooling structure found in batteries; the specific cooling process of the battery cell 2 will not be described in detail.

[0074] Specifically, such as Figure 9 As shown, a manifold 113 is also provided inside the main body 11 of the enclosure. The manifold 113 is connected to the pressure relief chamber 13, and the second explosion-proof box is correspondingly provided with the manifold 113. When the gas pressure inside the pressure relief chamber 13 reaches the preset value for valve opening, the second explosion-proof valve is opened to release gas, so that the gas in the pressure relief chamber 13 flows to the manifold 113, and then is discharged from the manifold 113 to the outside of the battery enclosure through the second explosion-proof valve, ensuring that the gas pressure in the pressure relief chamber 13 does not become too high. The specific discharge path of the thermal runaway gas in the pressure relief chamber 13 is as follows: Figure 9 As shown by arrow C in the diagram.

[0075] Specifically, the housing body 11 is a one-piece molded structure. That is to say, the housing body 11 and the structures mentioned above that are set on the housing body 11, such as the arc-shaped guide rib 31, the inlet 114, the outlet 115, the mounting panel, the mounting surface 112, the arched reinforcing rib 17, and the strip reinforcing rib 18, are all integrally molded with the housing body 11. On the one hand, this makes the manufacturing of the housing body 11 simpler and more convenient, simplifying the manufacturing process of the housing body 11; on the other hand, it ensures the stability and sealing of the connection between the housing body 11 and the structures set on it. In this embodiment, the housing body 11 is specifically a die-cast one-piece molded structure.

[0076] In this embodiment, the housing body 11 is made of aluminum. Aluminum has good thermal conductivity. When the battery cell 2 experiences thermal runaway and the first explosion-proof valve is opened, the high-heat gas comes into large-area contact with the housing body 11, so that the heat can be quickly conducted to the aluminum housing body 11. This allows the housing body 11 to absorb a large amount of heat in a very short time, avoiding the spread of heat caused by local overheating, and thus better playing the role of thermal runaway protection.

[0077] The specific working process of the battery box in this embodiment is as follows:

[0078] First, place the battery cells 2 one by one into the pressure relief holes 111, and use expanding foam to bond and fix the battery cells 2 into the first cavity 14. When the battery cell 2 experiences thermal runaway, open the first explosion-proof valve to discharge the gas generated by thermal runaway from the battery cell 2 through the valve port of the first explosion-proof valve. At this time, the discharged gas enters the pressure relief chamber 13 through the pressure relief hole 111. When the gas pressure in the pressure relief chamber 13 reaches the valve opening preset value, open the second explosion-proof valve to release the gas, so that the gas in the pressure relief chamber 13 flows to the manifold 113, and then is discharged from the manifold 113 to the outside of the battery box through the second explosion-proof valve, ensuring that the gas pressure in the pressure relief chamber 13 will not be too high.

[0079] When the first explosion-proof valve is opened, the central column inside the battery cell 2 is easily ejected. The ejected central column can pass through the pressure relief hole 111 and impact the mica sheet 121 and the bottom protective plate 122. The instantaneous impact force will cause the central column to bounce upward and sway circumferentially within the pressure relief hole 111. During the swaying process, one end of the central column can directly abut against the arc-shaped guide rib 31, so that the arc-shaped guide rib 31 can block the further swaying of the central column. This ensures that the other end of the central column is not electrically connected to the adjacent battery cell 2, so that the adjacent battery cells 2 will not affect each other in the event of thermal runaway.

[0080] The battery housing in this embodiment is not only simple and convenient to manufacture, but also ensures that adjacent battery cells 2 will not affect each other when thermal runaway occurs, thereby effectively preventing the further spread of thermal runaway. At the same time, separating the battery cells 2 from the electrical components ensures the independence of operation and facilitates the maintenance and protection of the electrical components. Furthermore, it can directly restrict the flow of foam adhesive to the outside of the battery housing, simplifying the bonding process of the battery cells 2 with foam adhesive. Moreover, it can ensure the supporting strength and compression resistance of the entire housing body 11.

[0081] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery casing, comprising a main casing (1) having a pressure relief hole (111) thereon, wherein the pressure relief hole (111) is correspondingly arranged with respect to the battery cell (2), characterized in that, A pressure relief chamber (13) is formed on the inner side of the bottom end of the main housing (1), the pressure relief chamber (13) is connected to the pressure relief hole (111), the first explosion-proof valve of the battery cell (2) is located near the pressure relief hole (111), and the battery housing also includes: A stopper (3) is provided on the pressure relief hole (111) at one end near the pressure relief chamber (13). When the first explosion-proof valve is opened and the central column of the battery cell (2) is ejected into the pressure relief hole (111), one end of the central column can abut against the stopper (3) so that the other end of the central column is not electrically connected to the adjacent battery cell. The main housing (1) has a first cavity (14) and a second cavity (15) spaced apart. The pressure relief hole (111) and the pressure relief cavity (13) are both located in the first cavity (14). The first cavity (14) is used to place the battery cell (2), and the second cavity (15) is used to place electrical components. The main housing (1) includes: a housing body (11), a pressure relief hole (111) disposed on the bottom end face of the housing body (11), a first cavity (14) and a second cavity (15) formed at intervals on the inner side of the housing body (11), and a protective member (12) disposed below the pressure relief hole (111) so that the pressure relief cavity (13) is formed between the bottom end face of the housing body (11) and the top end face of the protective member (12). The blocking component (3) includes: a plurality of arc-shaped guide ribs (31), which are arranged circumferentially on the box body (11) along the pressure relief hole (111) to block the central column. At least a first interval and a second interval are formed between the plurality of arc-shaped guide ribs (31), and the first interval is larger than the second interval. The first interval is the main pressure relief port (32), and the second interval is the auxiliary pressure relief port (33). The first interval and the second interval are respectively arranged corresponding to any one of the arc-shaped guide ribs (31) of the adjacent pressure relief hole (111).

2. The battery housing as described in claim 1, characterized in that, When the battery cell (2) is fixed in the first cavity (14) by foaming adhesive, the top surface of the housing body (11) is higher than the top surface of the foaming adhesive.

3. The battery housing as described in claim 1, characterized in that, The box body (11) is a one-piece molded structure.

4. The battery housing as described in claim 1, characterized in that, The bottom end face of the arc-shaped guide rib (31) abuts against the protective component (12).

5. The battery housing as described in claim 1, characterized in that, A gap is formed between the bottom end face of the arc-shaped guide rib (31) and the protective component (12).

6. The battery housing as described in any one of claims 1-3, characterized in that, The housing body (11) is provided with a water inlet (114), a water outlet (115), a mounting panel for installing the electrical components, and a mounting surface (112) for installing the second explosion-proof valve. The second explosion-proof valve can release pressure from the pressure relief chamber (13).

7. The battery housing as described in any one of claims 1-3, characterized in that, An arched reinforcing rib (17) is provided on the long side plate (116) of the box body (11), and the arched reinforcing rib (17) extends in an arc shape along the length direction of the box body (11).

8. A battery, characterized in that, The battery housing includes a battery casing as described in any one of claims 1-7 and a plurality of battery cells (2), wherein the plurality of battery cells (2) are arranged in an array within the battery casing.

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