Shell structure, battery pack and mobile energy storage power supply

Abstract

The present application relates to the technical field of energy storage power supply, and specifically provides a shell structure, a battery pack, and a mobile energy storage power supply. A plurality of slots for inserting the first ends of the power supply cores are formed in the shell structure, and a limiting structure is provided in the slots. The limiting structure is constructed to limit the insertion depth of the corresponding power cores in the slots, so that a first pressure relief space is formed between the first end of the corresponding power core and the bottom of the slots; the slot walls of adjacent slots jointly define an exhaust channel, and the exhaust channel is constructed to lead to the external environment. The slot walls of the slots are provided with a first connecting port, and the first connecting port connects the corresponding first pressure relief space and the corresponding exhaust channel. In the shell structure of the present application, when the power core undergoes thermal runaway, the gas generated by the power core rushes out from the safety valve at the first end and reaches the first pressure relief space; then enters the exhaust channel from the first connecting port, and finally is discharged from the exhaust channel to the external environment, thereby achieving pressure relief of the power core.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage power supplies, and in particular to a shell structure, a battery pack, and a mobile energy storage power supply. Background Art

[0002] As the capacity of mobile energy storage power supplies becomes larger and larger and their usage scenarios become wider and wider, their safety of use is increasingly valued by users.

[0003] In the related art, the battery pack in the mobile energy storage power supply includes a battery cell and a shell structure, and the battery cell is fixed therein by the shell structure. For the consideration of the stability of the battery cell installation, the end of the battery cell is usually inserted into the groove of the shell structure and is sealed at the bottom of the groove. However, the above design does not take into account the exhaust problem of the safety valve at the end of the battery cell when the battery cell is in thermal runaway. Utility Model Content

[0004] In view of this, the present application provides a shell structure, a battery pack and a mobile energy storage power supply, which can facilitate the exhaust of the safety valve at the end of the battery cell when the battery cell thermally runs away.

[0005] An embodiment of the present application provides a shell structure for accommodating a battery cell, wherein the first end of the battery cell has a safety valve, and a plurality of slots for inserting the first ends of the battery cells are formed in the shell structure, wherein the slots have a limiting structure, and the limiting structure is constructed to limit the insertion depth of the corresponding battery cell in the slots so that a first pressure relief space is formed between the first end of the corresponding battery cell and the bottom of the slots; the slot walls of adjacent slots jointly define an exhaust channel, and the exhaust channel is constructed to lead to the external environment, and the slot walls of the slots are provided with a first connecting port, and the first connecting port connects the corresponding first pressure relief space and the corresponding exhaust channel.

[0006] In the above shell structure, when the battery cell has thermal runaway, the gas generated by the battery cell rushes out from the safety valve at the first end and reaches the first pressure relief space; then enters the exhaust channel from the first connecting port, and finally is discharged from the exhaust channel to the external environment, thereby achieving pressure relief of the battery cell. The limiting structure can not only support the battery cell, but also facilitate the formation of the first pressure relief space between the first end of the battery cell and the bottom of the slot, so that the gas generated by the battery cell can be quickly discharged when the battery cell has thermal runaway, thereby improving the safety of the battery cell.

[0007] In at least one embodiment, the shell structure includes a shell body and a surrounding plate connected to each other, the shell body has a accommodating space, the accommodating space has an opening, and the opening connects the exhaust channel with the external environment; the surrounding plate is arranged in the accommodating space, and the surrounding plate and the shell body are combined to form a plurality of slots.

[0008] In the above-mentioned embodiment, the battery cell can be installed in the accommodation space and located in the slot. When the battery cell is in thermal runaway, the gas generated by the battery cell can be discharged from the safety valve at the first end, reach the opening of the accommodation space through the exhaust channel, and be discharged to the external environment, so as to achieve rapid pressure relief of the battery cell.

[0009] In at least one embodiment, the limiting structure includes a first support portion and a second support portion, two second support portions are provided, and the two second support portions are arranged at intervals. The two second support portions, the first support portion, the bottom of the slot, and the slot wall of the slot having a first connecting port are combined to form a first pressure relief space.

[0010] In the above embodiment, the first support part and the second support part can support the first end of the battery cell. The two second support parts can guide the airflow discharged from the safety valve to flow to the first connecting port and then flow into the exhaust channel to increase the exhaust speed.

[0011] In at least one embodiment, the shell body has a side plate, which is arranged on the outside of the surrounding plate, and the side plate forms an opening, and a second pressure relief space is formed between the groove wall of the slot near the side plate and the side plate, and the second pressure relief space is connected with the opening, and a second connecting port is provided on the groove wall of the slot near the side plate, and the second connecting port is connected with the second pressure relief space.

[0012] In the above embodiment, when the battery cell inserted in the slot near the side plate is depressurized, a part of the airflow entering the first depressurization space enters the exhaust channel from the first connecting port and is then discharged to the outside environment; another part of the airflow can be discharged from the second connecting port to the second depressurization space and then discharged from the opening to the outside environment to achieve depressurization. The provision of the second depressurization space increases the exhaust speed of the battery cell in the slot near the side plate.

[0013] In at least one embodiment, an exhaust channel is formed in a gap area surrounded by at least three adjacent slots, and each first pressure relief space corresponds to one of the first connecting ports and one of the exhaust channels.

[0014] In the above embodiment, each battery cell corresponds to a first pressure relief space, and the gas in each first pressure relief space can enter the corresponding exhaust channel through the corresponding first connecting port, thereby realizing the exhaust of the safety valve. When exhausting, the gas discharged from different battery cells is not easy to gather, which is conducive to dispersing the pressure inside the shell structure and reducing the situation of excessive local pressure in the shell structure caused by gas accumulation.

[0015] In at least one embodiment, each first pressure relief space and the corresponding first connecting port and the corresponding exhaust channel form a first pressure relief channel, and the cross-sectional area of ​​the first pressure relief channel in any direction is greater than or equal to the surface area of ​​a single safety valve.

[0016] In the above-mentioned embodiment, the setting of the first pressure relief channel allows the gas flow to have a larger flow space after being discharged from the safety valve, that is, in the first pressure relief channel, the gas flow rate per unit length is greater than the gas flow rate per unit length at the safety valve, so that the gas can be quickly discharged from the shell structure after being discharged from the safety valve.

[0017] In at least one embodiment, the slot has an escape zone, the escape zone is located in the spray valve direction of the safety valve, and the height of the escape zone in the spray valve direction of the safety valve is H, and H satisfies the following relationship:

[0018]

[0019] Wherein, N is the number of safety valves at the first end of a single battery cell, and S is the surface area of ​​the safety valve at the first end of a single battery cell.

[0020] In the above embodiment, the height H meets the above requirements, which is conducive to achieving the minimum height for smooth pressure relief of the battery cell, facilitating rapid pressure relief of the battery cell, and reducing the situation in which the gas cannot be quickly discharged to the exhaust channel after the pressure relief of the battery cell, resulting in obstruction of the pressure relief of the battery cell and further explosion.

[0021] In at least one embodiment, a groove wall of each slot is provided with an exhaust groove, the exhaust groove is configured to communicate with the external environment, and each exhaust groove is communicated with the corresponding first pressure relief space.

[0022] In the above embodiment, part of the airflow discharged from the safety valve can enter the exhaust groove through the first pressure relief space, and then be discharged from the exhaust groove to the external environment. The provision of the exhaust groove increases the flow space of the airflow discharged from the safety valve, which is convenient for reducing the pressure in the first pressure relief space and accelerating the discharge speed of the airflow.

[0023] An embodiment of the present application also provides a battery pack, comprising a fixed bracket, a battery cell and a shell structure in any of the above embodiments, wherein the fixed bracket is used to accommodate the second end of the battery cell, and the fixed bracket and the shell structure are spaced apart to form an open space connected to the interior of the shell structure.

[0024] In the above-mentioned battery pack, when thermal runaway occurs in the battery cell, the safety valve at the end of the battery cell discharges gas to the first pressure relief space, and then reaches the gap between the fixed bracket and the shell structure through the exhaust channel, and then is discharged to the external environment, thereby achieving rapid pressure relief of the battery cell.

[0025] An embodiment of the present application also provides a mobile energy storage power supply, including the battery pack in the above embodiment.

[0026] In the above-mentioned mobile energy storage power supply, when the battery pack in the mobile energy storage power supply suffers from thermal runaway, the gas can be quickly discharged through the shell structure, thereby reducing the gas accumulation in the shell structure and reducing the possibility of battery cell explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of a mobile energy storage power supply in one embodiment of the present application.

[0028] Figure 2 It is a three-dimensional diagram showing the internal structure of a mobile energy storage power supply in one embodiment of the present application.

[0029] Figure 3 This is an exploded view showing the internal structure of a mobile energy storage power supply in one embodiment of the present application.

[0030] Figure 4 is a three-dimensional diagram of a battery pack in one embodiment of the present application.

[0031] Figure 5 yes Figure 4 Enlarged view of part V.

[0032] Figure 6 It is a cross-sectional view of a mobile energy storage power supply in one embodiment of the present application.

[0033] Main component symbols

[0034] 100-shell structure 10-shell body 11-accommodating space

[0035] 111- opening 12- slot 121- exhaust slot

[0036] 122-avoidance area 13-limiting structure 131-first support part

[0037] 132- second support part 14- bottom plate 15- side plate

[0038] 20-first pressure relief space 30-exhaust channel 40-first communication port

[0039] 50-enclosure 51-peripheral portion 511-second communication port

[0040] 52-inner peripheral part 60-second pressure relief space 70-first pressure relief channel

[0041] 80-second pressure relief channel 200-battery pack 201-battery cell

[0042] 2011-first end 2012-second end 202-fixed bracket

[0043] 203-Open space 300-Mobile energy storage power supply 301-Casing

[0044] 3011-top shell 3012-bottom shell 302-waterproof cover

[0045] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0049] It should be noted that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation to the present application.

[0050] As the capacity of mobile energy storage power supplies becomes larger and larger and their usage scenarios become wider and wider, their safety of use is increasingly valued by users.

[0051] In the related art, the battery pack in the mobile energy storage power supply includes a battery cell and a shell structure, and the battery cell is fixed therein by the shell structure. For the consideration of the stability of the battery cell installation, the end of the battery cell is usually inserted into the groove of the shell structure and is sealed at the bottom of the groove. However, the above design does not take into account the exhaust problem of the safety valve at the end of the battery cell when the battery cell is in thermal runaway.

[0052] The present application provides a shell structure for accommodating a battery cell, wherein a safety valve is provided at the first end of the battery cell, and a plurality of slots for inserting the first ends of the battery cells are formed at the bottom of the shell structure, wherein a limiting structure is provided in the slot, and the limiting structure is configured to limit the insertion depth of the corresponding battery cell in the slot, so that a first pressure relief space is formed between the first end of the corresponding battery cell and the bottom of the slot; an exhaust channel is formed in a gap area formed by adjacent slots, and the exhaust channel is configured to lead to the external environment, and a first connecting port is provided in the slot wall, and the first connecting port connects the corresponding first pressure relief space and the corresponding exhaust channel.

[0053] In the above shell structure, when the battery cell has thermal runaway, the gas generated by the battery cell rushes out from the safety valve at the first end and reaches the first pressure relief space; then enters the exhaust channel from the first connecting port, and finally is discharged from the exhaust channel to the external environment, thereby achieving pressure relief of the battery cell. The limiting mechanism can not only support the battery cell, but also facilitate the formation of the first pressure relief space between the first end of the battery cell and the bottom of the slot, so that the gas generated by the battery cell can be quickly discharged when the battery cell has thermal runaway, thereby improving the safety of the battery cell.

[0054] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0055] like Figures 1 to 3 As shown, the embodiment of the present application provides a shell structure 100, a battery pack 200 and a mobile energy storage power supply 300, wherein the battery pack 200 includes the shell structure 100 and a battery cell 201, the shell structure 100 is used to accommodate the battery cell 201, and the mobile energy storage power supply 300 includes the battery pack 200. When the battery cell 201 has thermal runaway, the gas generated by the battery cell 201 can be quickly discharged to the external environment through the shell structure 100, so as to reduce the risk of explosion of the battery cell 201 and improve the safety of use.

[0056] In some embodiments, the first end 2011 of the battery cell 201 has a safety valve (not shown). When thermal runaway occurs in the battery cell 201 , the generated gas can open the safety valve to discharge the generated gas.

[0057] See also Figure 3 and Figure 4 In some embodiments, the shell structure 100 includes a connected shell body 10, the shell body 10 has a containing space 11, the containing space 11 has an opening 111, the opening 111 is connected to the external environment, the battery cell 201 is located in the containing space 11, and can discharge gas to the external environment through the opening 111.

[0058] See also Figure 3 , Figure 4 and Figure 5 In some embodiments, the shell structure 100 forms a slot 12 in which the first ends 2011 of multiple power supply cores 201 are inserted, and a limiting structure 13 is provided in the slot 12. The limiting structure 13 is constructed to limit the insertion depth of the corresponding battery cell 201 in the slot 12, so that a first pressure relief space 20 is formed between the first end 2011 of the corresponding battery cell 201 and the bottom of the slot 12; the slot walls of adjacent slots 12 jointly define an exhaust channel 30, and the exhaust channel 30 is constructed to lead to the external environment. The slot wall of the slot 12 is opened with a first connecting port 40, and the first connecting port 40 connects the corresponding first pressure relief space 20 and the corresponding exhaust channel 30.

[0059] When the battery cell 201 has thermal runaway, the gas generated by the battery cell 201 rushes out from the safety valve of the first end 2011 and reaches the first pressure relief space 20; then enters the exhaust channel 30 from the first connecting port 40, and finally is discharged from the exhaust channel 30 to the external environment, thereby achieving pressure relief of the battery cell 201. The limiting structure 13 can not only support the battery cell 201, but also facilitate the formation of the first pressure relief space 20 between the first end 2011 of the battery cell 201 and the bottom of the slot 12, so that when the battery cell 201 has thermal runaway, the gas generated can be quickly discharged, thereby improving the safety of the battery cell 201.

[0060] See also Figure 5 and Figure 6 In some embodiments, the first end 2011 of the battery cell 201 inserted into the slot 12 is the bottom end of the battery cell 201 , a first pressure relief space 20 is formed between the bottom end of the battery cell 201 and the bottom of the slot 12 , and the limiting structure 13 is located in the first pressure relief space 20 .

[0061] See also Figure 4 and Figure 5 The opening 111 is connected to the exhaust passage 30 . The shell structure 100 includes a surrounding plate 50 . The surrounding plate 50 is disposed in the accommodating space 11 . The surrounding plate 50 and the shell body 10 are combined to form a plurality of slots 12 . The first communication port 40 is disposed in the surrounding plate 50 .

[0062] The battery cell 201 can be installed in the accommodation space 11 and located in the slot 12. When the battery cell 201 is in thermal runaway, the gas generated by the battery cell 201 can be discharged from the safety valve of the first end 2011, reach the opening 111 of the accommodation space 11 through the exhaust channel 30, and be discharged to the external environment, so as to achieve rapid pressure relief of the battery cell 201.

[0063] In some embodiments, the shell body 10 and the enclosure 50 are an integrally formed structure, thereby facilitating improving the overall strength of the shell structure 100 .

[0064] In some embodiments, the enclosure 50 and the shell body 10 are an integrally formed structure, the enclosure 50 forms slot walls of a plurality of slots 12 , and the shell body 10 forms the bottom of the slots 10 .

[0065] In some embodiments, the shell structure 100 forms the slot 12 by a bottom depression, that is, the shell structure 100 is an integrally formed structure, thereby improving the structural strength of the shell structure 100, facilitating the production of the shell structure 100, and reducing the assembly steps.

[0066] See also Figures 3 to 5In some embodiments, a plurality of slots 12 are arranged in a honeycomb shape, and the enclosure 50 includes a plurality of peripheral portions 51 and at least one inner portion 52, each inner portion 52 is disposed between the plurality of peripheral portions 51, each peripheral portion 51 and a portion of the shell body 10 form a slot 12, and each inner portion 52 and a portion of the shell body 10 form a slot 12.

[0067] The plurality of slots 12 are arranged in a honeycomb shape, which improves the structural strength of the outer portion 51 , the inner portion 52 and the shell body 10 , and improves the space utilization of the accommodating space 11 .

[0068] In some embodiments, the slot walls of at least three adjacent slots 12 are arranged to form an exhaust channel 30, and each first pressure relief space 20 corresponds to one of the first connecting ports 40 and one of the exhaust channels 30. The slot 12 has an inner wall and an outer wall, the inner wall is used to contact the battery cell 201, and the outer wall is used to form the exhaust channel 30. For example, when the slot 12 is generally cylindrical in profile, that is, the outer wall of the slot 12 is arranged in an arc-shaped surface, and the exhaust channel 30 is formed by three adjacent slots 12, the outer walls of the three adjacent slots 12 are connected to form the exhaust channel 30, and the exhaust channel 30 extends along the insertion direction of the battery cell 201, and the end of the exhaust channel 30 away from the bottom of the slot 12 is connected to the external environment.

[0069] The gas in each first pressure relief space 20 can enter the corresponding exhaust channel 30 through the corresponding first connecting port 40, thereby achieving exhaust of the safety valve. During exhaust, the gas exhausted from different battery cells 201 is not easy to gather, which is conducive to dispersing the pressure inside the shell structure 100 and reducing the situation of excessive local pressure inside the shell structure 100 caused by gas accumulation.

[0070] In some embodiments, each exhaust channel 30 is formed between the slot walls of four adjacent slots 12. For example, when the slot 12 is substantially cylindrical in profile, that is, the outer wall of the slot 12 is arranged in an arc-shaped surface, four adjacent slots 12 are arranged in a matrix, and the outer walls of the four slots 12 are connected to form an exhaust channel 30, and the exhaust channel 30 extends along the insertion direction of the battery cell 201, and the end of the exhaust channel 30 away from the bottom of the slot 12 is connected to the external environment.

[0071] It can be understood that in other embodiments, each exhaust channel 30 can also be formed by the walls of other numbers of slots 12 .

[0072] In some embodiments, each first pressure relief space 20 forms a first pressure relief channel 70 with the corresponding first communication port 40 and the corresponding exhaust channel 30. The cross-sectional area of ​​the first pressure relief channel 70 in any direction is greater than or equal to the surface area of ​​a single safety valve. Figure 5The dotted arrow at the middle mark 70 is used to indicate the flow direction of the airflow in the first pressure relief channel 70 .

[0073] The setting of the first pressure relief channel 70 allows the gas to have a larger flow space after being discharged from the safety valve, that is, the gas flow rate per unit length in the first pressure relief channel 70 is greater than the gas flow rate per unit length at the safety valve. This setting prevents the gas from accumulating in the first pressure relief space 20 after being discharged from the safety valve, and allows the gas to be quickly discharged from the shell structure 100.

[0074] In some embodiments, the first communication port 40 penetrates the enclosure 50 in a direction away from the bottom of the slot 12 . This arrangement maximizes the size of the first communication port 40 to facilitate the discharge of gas in the first pressure relief space 20 to the exhaust channel 30 .

[0075] See also Figure 5 In some embodiments, a groove wall of each slot 12 is provided with an exhaust groove 121 , and the exhaust groove 121 is configured to communicate with the external environment, and each exhaust groove 121 is communicated with the corresponding first pressure relief space 20 .

[0076] A portion of the airflow discharged from the safety valve can enter the exhaust groove 121 through the first pressure relief space 20, and then be discharged to the outside environment from the exhaust groove 121. The provision of the exhaust groove 121 increases the flow space of the airflow discharged from the safety valve, which is conducive to reducing the pressure in the first pressure relief space 20 and accelerating the discharge speed of the airflow.

[0077] In some embodiments, the exhaust groove 121 extends from the bottom of the slot 12 to a direction away from the bottom of the slot 12 , and has a notch facing the outer peripheral wall of the battery cell 201 to facilitate airflow leaking outside the battery cell 201 to enter the exhaust groove 121 .

[0078] In some embodiments, the slot wall of each slot 12 has a plurality of exhaust slots 121 . For example, the slot wall of each slot 12 has two exhaust slots 121 .

[0079] See also Figure 4 and Figure 5 In some embodiments, the limiting structure 13 includes a first support portion 131 and a second support portion 132, two second support portions 132 are provided, and the two second support portions 132 are arranged at intervals, and the two second support portions 132, the first support portion 131, the bottom of the slot 12, and the slot wall of the slot 12 formed with the first communication port 40 enclose the first pressure relief space 20. Specifically, one end of the second support portion 132 is connected to the first support portion 131, and the other end is connected to the slot wall of the slot 12 formed with the first communication port 40, and the second support portion 132 extends from the bottom of the safety valve to the first communication port 40.

[0080] The first support portion 131 and the second support portion 132 can support the first end 2011 of the battery cell 201, so that there is a gap between the first end 2011 of the battery cell 201 and the bottom of the slot 12, so as to form a first pressure relief space 20. The two second support portions 132 can guide the airflow discharged from the safety valve to flow to the first connecting port 40, and then flow into the exhaust channel 30, so as to increase the exhaust speed.

[0081] See also Figure 4 and Figure 5 In some embodiments, the two second support portions 132 are substantially parallel, and a gap between the two second support portions 132 forms a flow channel to guide the gas from the bottom of the safety valve to the first communication port 40 .

[0082] In some embodiments, the slot 12 has a clearance area 122, and the clearance area 122 is located in the spray valve direction of the safety valve. Figure 5 and Figure 6 , Figure 5 and Figure 6 The spray direction of the safety valve is vertically downward. The height of the escape zone 122 in the spray direction of the safety valve is H, and H satisfies the following relationship:

[0083]

[0084] Wherein, N is the number of safety valves at the first end 2011 of a single battery cell 201, and S is the surface area of ​​the safety valve at the first end 2011 of a single battery cell 201. For example, when S is 80 square millimeters and N is 2, H is approximately greater than or equal to 14.28 millimeters.

[0085] The height H meets the above requirements, which is conducive to achieving the minimum height required for smooth pressure relief of the battery cell 201, facilitating rapid pressure relief of the battery cell 201, and reducing the situation in which the gas cannot be quickly discharged to the exhaust channel 30 after the pressure relief of the battery cell 201, resulting in the pressure relief of the battery cell 201 being blocked, and then the occurrence of explosion.

[0086] In some embodiments, the slot wall of the slot 12, the bottom of the slot 12 and the limiting structure 13 enclose a clearance zone 122, and the height H of the clearance zone 122 in the spray valve direction of the safety valve is the height of the safety valve corresponding to the bottom of the slot 12.

[0087] In some embodiments, the height of the first support portion 131 is consistent with the height of the second support portion 132 and the overall height of the limiting structure 13 , and the height H of the avoidance area 122 in the spray valve direction of the safety valve is the height of the limiting structure 13 .

[0088] See also Figure 4 and Figure 5In some embodiments, the shell body 10 has a bottom plate 14 and a side plate 15, and the bottom plate 14 and the side plate 15 enclose a receiving space 11. The side plate 15 is arranged outside the enclosing plate 50, and the side plate 15 forms an opening 111, and a second pressure relief space 60 is formed between the portion of the slot wall of the slot 12 close to the side plate 15 facing the side plate 15 and the side plate 15, and the second pressure relief space 60 is connected to the opening 111, and a second communication port 511 is provided on the portion of the slot wall of the slot 12 close to the side plate 15 facing the side plate 15, and the second communication port 511 is connected to the second pressure relief space 60.

[0089] When the battery cell 201 inserted in the slot 12 near the side plate 15 is depressurized, a portion of the airflow discharged from the safety valve enters the exhaust channel 30 from the first connecting port 40 and is then discharged to the outside environment; another portion of the airflow can be discharged from the second connecting port 511 to the second pressure relief space 60 and then discharged from the opening 111 to the outside environment to achieve pressure relief. The provision of the second pressure relief space 60 increases the exhaust speed of the battery cell 201 in the slot 12 near the side plate 15.

[0090] See also Figure 5 In some embodiments, each second communication port 511 and the second pressure relief space 60 form a second pressure relief channel 80 , and part of the gas discharged from the safety valve is discharged from the first pressure relief channel 70 , and the other part is discharged from the second pressure relief channel 80 . Figure 5 The dotted arrow at the middle mark 80 is used to indicate the flow direction of the airflow in the second pressure relief channel 80. The provision of the second pressure relief channel 80 can reduce the pressure in the slot 12 located near the side plate 15, and reduce the risk of the battery cell 201 exploding.

[0091] In some embodiments, each second communication opening 511 disposed on the slot wall of the slot 12 near the side plate 15 has a plurality of, for example, Figure 5 The number of second communication openings 511 corresponding to the groove wall of each slot 12 close to the side plate 15 is set to two.

[0092] See also Figure 3 and Figure 6 In some embodiments, the battery pack 200 further includes a fixing bracket 202, the fixing bracket 202 is used to accommodate the second end 2012 of the battery cell 201, and the second end 2012 of the battery cell 201 and the bottom end of the battery cell 201 are two opposite ends of the battery cell 201. The fixing bracket 202 and the shell structure 100 are spaced apart to form an open space 203 connected to the inside of the shell structure 100. For example, in an embodiment with an opening 111, the open space 203 between the fixing bracket 202 and the shell structure 100 is connected to the opening 111, so that the gas can be discharged from the opening 111 to the external environment when the pressure is released.

[0093] See also Figure 4 and Figure 6When the shell structure 100 is assembled with a plurality of battery cells 201, there is a gap between adjacent battery cells 201, and the gap is connected to the open space 203 between the fixing bracket 202 and the shell structure 100. The gas discharged from the exhaust channel 30 can flow out from the gap between the battery cells 201 to the open space 203, and then be discharged to the external environment.

[0094] In some embodiments, the battery pack 200 can also be used as a backup power source and can be sold independently, or can be used in conjunction with the mobile energy storage power source 300 to recharge the mobile energy storage power source 300.

[0095] See also Figure 1 In some embodiments, the mobile energy storage power supply 300 further includes a housing 301, and the battery pack 200 is disposed inside the housing 301. The housing 301 is in an incompletely closed state so that the gas discharged from the battery pack 200 can be discharged to the outside of the mobile energy storage power supply 300.

[0096] In some embodiments, the outer shell 301 includes a top shell 3011 and a bottom shell 3012 . The shell structure 100 is used to constitute a part of the bottom shell 3012 and is covered with the top shell 3011 to form the outer shell 301 of the mobile energy storage power supply 300 to protect the internal battery cells 201 .

[0097] See also Figure 2 and Figure 3 In some embodiments, the mobile energy storage power supply 300 further includes a waterproof cover 302 , which covers the outside of the fixing bracket 202 and closes the opening 111 of the accommodating space 11 to improve the waterproof property of the mobile energy storage power supply 300 .

[0098] In addition, those skilled in the art may also make other changes in the present application. Of course, these changes made based on the present application should be included in the scope disclosed in the present application.

Claims

1. A shell structure for accommodating a battery cell, wherein the first end of the battery cell has a safety valve, characterized in that: A plurality of slots for inserting the first ends of the battery cells are formed in the shell structure, and a limiting structure is provided in the slots, and the limiting structure is configured to limit the insertion depth of the corresponding battery cells in the slots, so that a first pressure relief space is formed between the first ends of the corresponding battery cells and the bottom of the slots; The groove walls of adjacent slots jointly define an exhaust channel, and the exhaust channel is configured to lead to the external environment. The groove walls of the slots are provided with a first connecting port, and the first connecting port connects the corresponding first pressure relief space and the corresponding exhaust channel.

2. The shell structure according to claim 1, characterized in that The shell structure includes a shell body and a surrounding plate connected to each other, the shell body has a containing space, the containing space has an opening, and the opening connects the exhaust passage with the external environment; the surrounding plate is arranged in the containing space, and the surrounding plate and the shell body are combined to form a plurality of the slots.

3. The shell structure according to claim 2, characterized in that The limiting structure includes a first supporting portion and a second supporting portion, wherein two second supporting portions are provided, and the two second supporting portions are arranged at intervals, and the two second supporting portions, the first supporting portion, the bottom of the slot, and the slot wall of the slot having the first connecting port formed therein together form the first pressure relief space.

4. The shell structure according to claim 2, characterized in that The shell body has a side plate, which is arranged on the outside of the enclosure plate, and the side plate forms the opening. A second pressure relief space is formed between the groove wall of the slot close to the side plate and the side plate, and the second pressure relief space is connected to the opening. A second connecting port is provided on the groove wall of the slot close to the side plate, and the second connecting port is connected to the second pressure relief space.

5. The shell structure according to claim 1, characterized in that An exhaust channel is formed in a gap area surrounded by at least three adjacent slots, and each of the first pressure relief spaces corresponds to one of the first connecting ports and one of the exhaust channels.

6. The shell structure according to claim 5, characterized in that Each of the first pressure relief spaces, the corresponding first communicating port and the corresponding exhaust channel form a first pressure relief channel, and a cross-sectional area of ​​the first pressure relief channel in any direction is greater than or equal to a surface area of ​​a single safety valve.

7. The shell structure according to claim 1, characterized in that The slot has a clearance zone, the clearance zone is located in the spray valve direction of the safety valve, the height of the clearance zone in the spray valve direction of the safety valve is H, and the H satisfies the following relationship: Wherein, N is the number of the safety valves at the first end of a single battery cell, and S is the surface area of ​​the safety valve at the first end of a single battery cell.

8. The shell structure according to claim 1, characterized in that An exhaust groove is formed on the groove wall of each slot, and the exhaust groove is configured to communicate with the external environment, and each exhaust groove is communicated with the corresponding first pressure relief space.

9. A battery pack, characterized in that: It comprises a fixing bracket, a battery cell and a shell structure as claimed in any one of claims 1 to 8, wherein the fixing bracket is used to accommodate the second end of the battery cell, and the fixing bracket and the shell structure are spaced apart to form an open space connected to the inside of the shell structure.

10. A mobile energy storage power supply, characterized in that: Comprising a battery pack as claimed in claim 9.

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