Single battery and battery pack

Abstract

The utility model discloses a single battery and a battery pack. The battery pack comprises a box body. The battery pack further comprises a plurality of single batteries which are arranged in the box body. Wherein each single battery comprises a shell and a battery cell, a partition plate is arranged in the shell and divides the internal space of the shell into a battery cell cavity and a functional cavity, the battery cell is arranged in the battery cell cavity, and the partition plate is provided with an anti-explosion valve. The battery pack further comprises switching assemblies, and the functional cavities of the different single batteries are communicated through the switching assemblies. In this way, the safety of the battery pack can be improved, and the structure of the battery pack can be simplified.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a single cell and a battery pack. Background Art

[0002] As the safety requirements for batteries become higher and higher, the current main methods to improve battery safety are to increase the area of ​​a single explosion-proof valve on the battery, increase the number of explosion-proof valves, and design a reasonable valve opening threshold. Since the explosion-proof valve is located on the outer surface of the battery, a dedicated exhaust channel needs to be designed in the battery pack. The high-temperature gas generated by thermal runaway of the battery can easily fill the battery pack, causing the temperature of other batteries and components to rise, leading to a chain reaction failure. In addition, the design of a dedicated exhaust channel will make the battery pack structure complex and increase the cost. Utility Model Content

[0003] The present application provides a single cell and a battery pack, which can improve the safety of the battery pack and simplify the structure of the battery pack.

[0004] The present application provides a battery pack. The battery pack includes a box. The battery pack also includes a plurality of single cells, which are arranged in the box. The single cells include a shell and a battery cell, and a partition is arranged inside the shell. The partition separates the internal space of the shell into a battery cell cavity and a functional cavity. The battery cell is arranged in the battery cell cavity, and the partition is provided with an explosion-proof valve. The battery pack also includes a transfer assembly, and the functional cavities of different single cells are connected through the transfer assembly.

[0005] In one embodiment of the present application, a battery pack has a first direction and a second direction that are perpendicular to each other; the battery pack includes at least two battery groups, at least two battery groups are distributed along the first direction, and each battery group includes a plurality of single cells distributed along the second direction; the adapter assembly includes a plurality of first adapter tubes and at least one second adapter tube; the functional cavities of two adjacent single cells in the same battery pack are connected through the first adapter tube, and the functional cavity of at least one single cell in any battery group is connected to the functional cavity of a single cell in an adjacent battery group through the second adapter tube.

[0006] In one embodiment of the present application, connectors connected to the functional cavity are respectively provided at both ends of the single cell in the first direction; the two sides of the single cell in the second direction are respectively the first side and the second side; in the battery pack, one connector of one single cell is connected to the connector of the single cell located on the first side and adjacent to it through a first transfer tube, and the other connector of the single cell is connected to the connector of the single cell located on the second side and adjacent to it through another first transfer tube.

[0007] In one embodiment of the present application, each battery pack has a first single cell at one end in the second direction, and each battery pack has a second single cell at the other end in the second direction; the functional cavity of the first single cell in one battery pack is connected to the functional cavity of the first single cell in an adjacent battery pack through a second adapter tube; the box body is provided with a main connector, and the adapter assembly also includes a third adapter tube, and the end of the second single cell in the first direction is provided with a connector connected to the functional cavity, and the connector of the second single cell is connected to the main connector through the third adapter tube.

[0008] In one embodiment of the present application, the battery pack includes a first battery group and a second battery group; the box is provided with a first main connector and a second main connector; the end of the single battery in the first direction is provided with a connector connected to the functional cavity; the adapter assembly also includes a third adapter tube; the connector of at least one single battery in the first battery group is connected to the first main connector via the third adapter tube, and the connector of at least one single battery in the second battery group is connected to the second main connector via the third adapter tube.

[0009] In one embodiment of the present application, the shell includes a shell body and a cover body assembly; an opening connected to its internal space is formed at the end of the shell body; the cover body assembly includes a cover body and a pole, and the cover body is covered on the opening so that the cover body and the shell body cooperate to enclose a battery cell cavity and a functional cavity; the single battery also includes a connector, the pole and the connector are both arranged on the cover body, and the functional cavity is connected to the adapter assembly through the connector.

[0010] In one embodiment of the present application, openings are formed at opposite ends of the shell body, each opening is covered with a cover assembly, and each cover assembly is provided with a joint.

[0011] In one embodiment of the present application, the box body is provided with a main connector, and the functional cavity of the single cell is also connected to the main connector through a adapter assembly; the gas in the cell cavity of the single cell is discharged to the functional cavity through an explosion-proof valve and discharged to the outside of the box body via the main connector, and / or the main connector is used to input heat exchange fluid into the functional cavity of the single cell.

[0012] In one embodiment of the present application, the battery pack further includes: a heat exchange plate, which is arranged on one side of the single battery, and the heat exchange plate is used for performing heat exchange with the single battery.

[0013] Correspondingly, the present application also provides a single cell battery, comprising: a shell, inside which is provided with a partition, the partition separating the internal space of the shell into a battery cell cavity and a functional cavity; wherein the partition is provided with an explosion-proof valve; a battery cell, arranged in the battery cell cavity; and a connector, arranged in the shell, the connector being connected to the functional cavity, and the connector is also connected to the outside of the shell.

[0014] The beneficial effects of the present application are as follows: the present application provides a single cell and a battery pack. A partition is provided inside the shell of the single cell, and the partition separates the internal space of the shell into a cell cavity and a functional cavity. The cell is arranged in the cell cavity, and the partition is provided with an explosion-proof valve. The functional cavities of different single cells are connected through a adapter assembly. When a single cell has thermal runaway, the high-temperature gas in the cell cavity is discharged into the functional cavity through the explosion-proof valve, and further discharged to the outside of the battery pack through the adapter assembly, which can improve the discharge efficiency of the high-temperature gas to improve the safety of the battery pack. In addition, the functional cavity for exhaust is integrated inside the single cell, which can simplify the exhaust design of the battery pack, thereby simplifying the structure of the battery pack and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of an embodiment of a battery pack of the present application;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of a single cell of the present application;

[0018] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the single battery shown;

[0019] Figure 4 is a schematic cross-sectional structure diagram of an embodiment of a single cell of the present application;

[0020] Figure 5 yes Figure 4 The schematic diagram of the structure of the single cell A area is shown;

[0021] Figure 6 yes Figure 1 A schematic diagram of the structure of a single cell in the battery pack shown;

[0022] Figure 7 It is a structural schematic diagram of another embodiment of the battery pack of the present application.

[0023] Description of reference numerals:

[0024] 10 battery pack; 11 housing; 12 battery group; 121 first battery group; 122 second battery group; 13 main connector; 131 first main connector; 132 second main connector; 14 heat exchange plate; 20 single battery; 20a first side; 20b second side; 20c first single battery; 20d second single battery; 21 housing; 211 partition; 212 battery cell cavity; 213 functional cavity; 214 housing body; 215 cover body assembly; 216 cover body; 217 pole; 218 opening; 22 battery cell; 23 explosion-proof valve; 24 connector; 30 adapter assembly; 31 first adapter tube; 32 second adapter tube; 33 third adapter tube. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely 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. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0026] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "stacked" and the like should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] The present application provides a single cell and a battery pack, which are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0028] In order to solve the technical problems of low exhaust efficiency and complex structure of battery packs in the prior art, an embodiment of the present application provides a battery pack. The battery pack includes a box. The battery pack also includes a plurality of single cells, and the plurality of single cells are arranged in the box. Among them, the single cell includes a shell and a battery cell, and a partition is arranged inside the shell. The partition separates the internal space of the shell into a battery cell cavity and a functional cavity. The battery cell is arranged in the battery cell cavity, and the partition is provided with an explosion-proof valve. The battery pack also includes a transfer assembly, and the functional cavities of different single cells are connected through the transfer assembly. It is explained in detail below.

[0029] See also Figure 1 , Figure 1 It is a structural schematic diagram of an embodiment of a battery pack of the present application.

[0030] In one embodiment, the battery pack 10 includes a box 11 and a plurality of single cells 20, and the plurality of single cells 20 are accommodated in the box 11. The single cells 20 include but are not limited to lithium ion secondary batteries, lithium ion primary batteries, lithium sulfur batteries, sodium lithium ion batteries, sodium ion batteries or magnesium ion batteries, etc., which are not limited in the embodiments of the present disclosure. The battery pack 10 is a power supply for an electrical device. The electrical device may be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, and an electric tool. For example, a spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft; an electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy; an electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer.

[0031] Please also read Figures 2 to 5 , Figure 2 is a schematic structural diagram of an embodiment of a single cell of the present application, Figure 3 yes Figure 2 The exploded structure diagram of the single battery is shown. Figure 4 is a schematic cross-sectional structure diagram of an embodiment of a single cell of the present application, Figure 5 yes Figure 4 Schematic diagram of the structure of the single cell A area shown.

[0032] In one embodiment, the single cell 20 includes a shell 21 and a battery cell 22. A partition 211 is provided inside the shell 21, and the partition 211 separates the internal space of the shell 21 into a battery cell cavity 212 and a functional cavity 213. The battery cell 22 is arranged in the battery cell cavity 212. The partition 211 is provided with an explosion-proof valve 23. The number of explosion-proof valves 23 can be one or two or more. The single cell 20 also includes a connector 24. The connector 24 is provided in the shell 21, and the connector 24 is connected to the functional cavity 213, and the connector 24 is also connected to the outside of the shell 21. The battery pack 10 also includes an adapter assembly 30. The functional cavities 213 of different single cells 20 are connected through the adapter assembly 30, and specifically, the connectors 24 of different single cells 20 are connected through the adapter assembly 30.

[0033] In the above manner, the functional cavities 213 of different single cells 20 are connected through the adapter assembly 30, that is, in this embodiment, the functional cavities 213 of each single cell 20 are connected to each other through the adapter assembly 30 to form an integrated exhaust channel. When a single cell 20 has thermal runaway, the high-temperature gas in the cell cavity 212 is discharged into the functional cavity 213 through the explosion-proof valve 23, and further discharged to the outside of the battery pack 10 through the adapter assembly 30, so that the high-temperature gas is efficiently discharged, which can improve the discharge efficiency of the high-temperature gas and improve the safety of the battery pack 10. In addition, the functional cavity 213 for exhaust is integrated inside the single cell 20, which can simplify the exhaust design of the battery pack 10, thereby simplifying the structure of the battery pack 10 and reducing the cost.

[0034] In one embodiment, the battery pack 10 has a first direction X and a second direction Y that are perpendicular to each other. The battery pack 10 includes at least two battery packs 12 distributed along the first direction X, and each battery pack 12 includes a plurality of single cells 20 distributed along the second direction Y.

[0035] Figure 1 The battery pack 10 is exemplarily shown to include a first battery group 121 and a second battery group 122, the first battery group 121 and the second battery group 122 are distributed along a first direction X, and the first battery group 121 and the second battery group 122 each include a plurality of single cells 20 distributed along a second direction Y. Of course, in other embodiments of the present application, the battery pack 10 may also include one battery group 12 or more than two battery groups 12, which is not limited here.

[0036] The connector 24 is located at the end of the single battery 20 in the first direction X. Furthermore, the shell 21 includes a shell body 214 and a cover assembly 215. The battery cell cavity 212 and the functional cavity 213 are located inside the shell body 214. An opening 218 communicating with its internal space is provided at the end of the shell body 214 in the first direction X, and the cover assembly 215 is covered on the opening 218. The cover assembly 215 includes a cover body 216 and a pole 217. The cover body 216 is covered on the opening 218, so that the cover body 216 and the shell body 214 cooperate to enclose the battery cell cavity 212 and the functional cavity 213. The pole 217 and the connector 24 are both arranged on the cover body 216, and the functional cavity 213 is connected to the adapter assembly 30 through the connector 24.

[0037] Figure 2 and Figure 3 The single battery 20 is exemplarily shown as a double-pass type. The shell body 214 has openings 218 at both opposite ends in the first direction X, each opening 218 is covered with a cover assembly 215, and each cover assembly 215 is provided with a connector 24. Of course, in other embodiments of the present application, the shell body 214 may also be provided with an opening 218 and a cover assembly 215 at only one end in the first direction X, which is not limited here.

[0038] In one embodiment, the adapter assembly 30 includes a plurality of first adapter tubes 31 and at least one second adapter tube 32. The functional cavities 213 of two adjacent single cells 20 in the same battery pack 12 are connected through the first adapter tube 31, that is, the connectors 24 of the two adjacent single cells 20 are connected through the first adapter tube 31. The functional cavity 213 of at least one single cell 20 in any battery pack 12 is connected to the functional cavity 213 of the single cell 20 in the adjacent battery pack 12 through the second adapter tube 32, that is, the connector 24 of at least one single cell 20 in any battery pack 12 is connected to the connector 24 of the single cell 20 in the adjacent battery pack 12 through the second adapter tube 32.

[0039] In the above manner, the functional cavities 213 of the single cells 20 in the same battery pack 12 are interconnected through the first transfer tube 31, and the functional cavities 213 of the single cells 20 in different battery packs 12 are interconnected through the second transfer tube 32, so that the functional cavities 213 of each single cell 20 in the battery pack 10 are interconnected to form an integral exhaust channel. When a single cell 20 has thermal runaway, the high-temperature gas in the cell cavity 212 is discharged into the functional cavity 213 through the explosion-proof valve 23, and further discharged to the outside of the battery pack 10 through the adapter assembly 30, so that the high-temperature gas is efficiently discharged, which can improve the discharge efficiency of the high-temperature gas and improve the safety of the battery pack 10.

[0040] The housing 11 is provided with a main connector 13. The functional cavity 213 of the single cell 20 is also connected to the main connector 13 through the adapter assembly 30. The gas in the cell cavity 212 of the single cell 20 is discharged to the functional cavity 213 through the explosion-proof valve 23 and discharged to the outside of the housing 11 through the main connector 13. Specifically, the adapter assembly 30 also includes a third adapter tube 33, and the connector 24 of the single cell 20 in at least one battery group 12 is connected to the main connector 13 through the third adapter tube 33, so that the functional cavity 213 of each single cell 20 of the battery pack 10 is connected to the main connector 13. When thermal runaway occurs in the single cell 20, the high-temperature gas discharged into the functional cavity 213 is discharged to the outside of the battery pack 10 from the main connector 13 through the third adapter tube 33.

[0041] Further, based on the example that the battery pack 10 includes the first battery group 121 and the second battery group 122, the box body 11 is provided with a first main connector 131 and a second main connector 132, and the connector 24 of at least one single battery 20 in the first battery group 121 is connected to the first main connector 131 through the third adapter tube 33, and the connector 24 of at least one single battery 20 in the second battery group 122 is connected to the second main connector 132 through the third adapter tube 33. In this way, when the single battery 20 has thermal runaway, the high-temperature gas discharged into the functional cavity 213 can be discharged to the outside of the battery pack 10 through the first main connector 131 and / or the second main connector 132. In this embodiment, the first main connector 131 and the second main connector 132 are provided to increase the outlet for discharging the high-temperature gas, thereby further improving the discharge efficiency of the high-temperature gas.

[0042] Optionally, the number of main connectors 13 may be adapted to the number of battery packs 12 . Figure 1 The example shows the case where the number of main connectors 13 is the same as the number of battery packs 12. In other embodiments of the present application, the battery pack 10 may have other numbers of battery packs 12, and the same number of main connectors 13 may be provided according to the number of battery packs 12, which is not limited here.

[0043] Please also read Figure 6 , Figure 6 yes Figure 1 Schematic diagram of the structure of a single cell in the battery pack shown.

[0044] In one embodiment, based on the example that the two ends of the single cell 20 in the first direction X are respectively provided with connectors 24, the two sides of the single cell 20 in the second direction Y are respectively the first side 20a and the second side 20b. The functional cavities 213 of the two adjacent single cells 20 in the same battery pack 12 are connected through the first transfer tube 31, which is specifically manifested as follows: in the battery pack 12, one connector 24 of one single cell 20 is connected to the connector 24 of the single cell 20 located at the first side 20a and adjacent to it through the first transfer tube 31, and the other connector 24 of the single cell 20 is connected to the connector 24 of the single cell 20 located at the second side 20b and adjacent to it through another first transfer tube 31.

[0045] In the above manner, the functional chambers 213 of the multiple single cells 20 in the same battery pack 12 cooperate with the first transfer tube 31 to form an "S"-shaped exhaust channel. In this way, when the single cell 20 has thermal runaway, the high-temperature gas discharged into the functional chamber 213 can be efficiently discharged along the aforementioned "S"-shaped exhaust channel, which can improve the discharge efficiency of the high-temperature gas and improve the safety of the battery pack 10.

[0046] For example, each battery pack 12 has a first single cell 20c at one end in the second direction Y, and a second single cell 20d at the other end in the second direction Y. The functional cavity 213 of the first single cell 20c in one battery pack 12 is connected to the functional cavity 213 of the first single cell 20c in the adjacent battery pack 12 through the second transfer tube 32, and the connector 24 of the second single cell 20d in the battery pack 12 is connected to the main connector 13 through the third transfer tube 33. In this way, the functional cavities 213 of all single cells 20 in the same battery pack 12 participate in forming an "S"-shaped exhaust channel, so that when any single cell 20 has thermal runaway, the high-temperature gas discharged into the functional cavity 213 can be efficiently discharged along the aforementioned "S"-shaped exhaust channel, which can improve the exhaust efficiency of the high-temperature gas, and further reduce the risk of high-temperature gas staying in the battery pack 10, and reduce the risk of thermal runaway problems spreading and causing chain failures, thereby improving the safety of the battery pack 10.

[0047] Based on the example in which the battery pack 10 includes a first battery group 121 and a second battery group 122, and the main connector 13 includes a first main connector 131 and a second main connector 132, the connector 24 of at least one single cell 20 in the first battery group 121 is connected to the first main connector 131 via a third transfer tube 33, and the connector 24 of at least one single cell 20 in the second battery group 122 is connected to the second main connector 132 via a third transfer tube 33.

[0048] Specifically, among the cells 20 located between the first cell 20c and the second cell 20d of the first battery group 121, one connector 24 of any cell 20 is connected to the connector 24 of the cell 20 located at the first side 20a and adjacent to it through the first transfer tube 31, and another connector 24 of the cell 20 is connected to the connector 24 of the cell 20 located at the second side 20b and adjacent to it through another first transfer tube 31. Among the cells 20 located between the first cell 20c and the second cell 20d of the second battery group 122, one connector 24 of any cell 20 is connected to the connector 24 of the cell 20 located at the first side 20a and adjacent to it through the first transfer tube 31, and another connector 24 of the cell 20 is connected to the connector 24 of the cell 20 located at the second side 20b and adjacent to it through another first transfer tube 31. The connector 24 of the first single cell 20c in the first battery group 121 is connected to the connector 24 of the first single cell 20c in the second battery group 122 via the second transfer tube 32. The connector 24 of the second single cell 20d in the first battery group 121 is connected to the first main connector 131 via the third transfer tube 33, and the connector 24 of the second single cell 20d in the second battery group 122 is connected to the second main connector 132 via the third transfer tube 33.

[0049] In an alternative embodiment, the difference between this embodiment and the above embodiment is that the main connector 13 can also be used to input heat exchange fluid into the functional cavity 213 of the single battery 20, and the heat exchange fluid exchanges heat with the battery cell 22 (including heating or cooling the battery cell 22), thereby realizing thermal management of the single battery 20.

[0050] Specifically, the battery pack 10 includes a first battery group 121 and a second battery group 122, and the main connector 13 includes a first main connector 131 and a second main connector 132. Among the single cells 20 located between the first single cell 20c and the second single cell 20d of the first battery group 121, one connector 24 of any single cell 20 is connected to the connector 24 of the single cell 20 located at the first side 20a and adjacent through the first transfer tube 31, and the other connector 24 of the single cell 20 is connected to the connector 24 of the single cell 20 located at the second side 20b and adjacent through another first transfer tube 31. Among the single cells 20 located between the first single cell 20c and the second single cell 20d of the second battery group 122, one connector 24 of any single cell 20 is connected to the connector 24 of the single cell 20 located at the first side 20a and adjacent through the first transfer tube 31, and the other connector 24 of the single cell 20 is connected to the connector 24 of the single cell 20 located at the second side 20b and adjacent through the first transfer tube 31. The connector 24 of the first single cell 20c in the first battery group 121 is connected to the connector 24 of the first single cell 20c in the second battery group 122 via the second transfer tube 32. The connector 24 of the second single cell 20d in the first battery group 121 is connected to the first main connector 131 via the third transfer tube 33, and the connector 24 of the second single cell 20d in the second battery group 122 is connected to the second main connector 132 via the third transfer tube 33.

[0051] The heat exchange fluid is introduced from one of the first main connector 131 and the second main connector 132, and discharged from the other of the first main connector 131 and the second main connector 132. When the single battery 20 has thermal runaway, the high-temperature gas in the cell cavity 212 is discharged into the functional cavity 213 through the explosion-proof valve 23, and the high-temperature gas can be discharged to the outside of the battery pack 10 together with the heat exchange fluid. This embodiment uses the functional cavity 213 of the single battery 20 as the heat exchange flow channel, which can omit the liquid cooling plate and thermal conductive glue in the battery pack 10, which is further conducive to simplifying the structure of the battery pack 10 and reducing costs.

[0052] Please also read Figure 7 , Figure 7 It is a structural schematic diagram of another embodiment of the battery pack of the present application.

[0053] In another alternative embodiment, the difference between this embodiment and the above embodiment is that the battery pack 10 further includes a heat exchange plate 14, which is arranged on one side of the single battery 20, and the heat exchange plate 14 is used to perform heat exchange with the single battery 20. The heat exchange plate 14 passes through the heat exchange fluid to perform heat exchange with the single battery 20 (including heating or cooling the battery cell 22), so as to realize the thermal management of the single battery 20. In this embodiment, the main connector 13 can be used to discharge high-temperature gas, that is, the functional cavity 213 of the single battery 20 is used as an exhaust channel to cooperate with the heat exchange plate 14 to ensure the safety of the battery pack 10. Alternatively, the main connector 13 is not only used to discharge high-temperature gas, but also used to input heat exchange fluid into the functional cavity 213 of the single battery 20. When the single battery 20 has thermal runaway, the high-temperature gas in the battery cell cavity 212 is discharged into the functional cavity 213 through the explosion-proof valve 23, and the high-temperature gas can be discharged to the outside of the battery pack 10 together with the heat exchange fluid, and then cooperate with the heat exchange plate 14 to further ensure the safety of the battery pack 10.

[0054] In summary, the present application provides a single cell and a battery pack. A partition is provided inside the shell of the single cell, and the partition separates the internal space of the shell into a battery cell cavity and a functional cavity. The battery cell is arranged in the battery cell cavity, and the partition is provided with an explosion-proof valve. The functional cavities of different single cells are connected through a adapter assembly. When a single cell has thermal runaway, the high-temperature gas in the battery cell cavity is discharged into the functional cavity through the explosion-proof valve, and further discharged to the outside of the battery pack through the adapter assembly, which can improve the discharge efficiency of the high-temperature gas to improve the safety of the battery pack. In addition, the functional cavity for exhaust is integrated inside the single cell, which can simplify the exhaust design of the battery pack, thereby simplifying the structure of the battery pack and reducing the cost.

[0055] The single cell battery and battery pack provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery pack, characterized in that: include: Box; A plurality of single cells are arranged in the box; The single battery comprises a shell and a battery cell, a partition is arranged inside the shell, the partition separates the internal space of the shell into a battery cell cavity and a functional cavity, the battery cell is arranged in the battery cell cavity, and the partition is provided with an explosion-proof valve; as well as A switching assembly, through which the functional chambers of different single batteries are connected.

2. The battery pack according to claim 1, characterized in that: The battery pack has a first direction and a second direction perpendicular to each other; the battery pack includes at least two battery groups, at least two battery groups are distributed along the first direction, and each of the battery groups includes a plurality of single cells distributed along the second direction; The adapter assembly includes multiple first adapter tubes and at least one second adapter tube; the functional cavities of two adjacent single cells in the same battery pack are connected through the first adapter tube, and the functional cavity of at least one single cell in any battery pack is connected to the functional cavity of a single cell in an adjacent battery pack through the second adapter tube.

3. The battery pack according to claim 2, characterized in that: The two ends of the single cell in the first direction are respectively provided with joints communicating with the functional cavity; the two sides of the single cell in the second direction are respectively a first side and a second side; In the battery pack, one connector of one single cell is connected to the connector of the adjacent single cell located on the first side through one first transfer tube, and another connector of the single cell is connected to the connector of the adjacent single cell located on the second side through another first transfer tube.

4. The battery pack according to claim 2, characterized in that: Each of the battery packs has a first single battery at one end in the second direction, and a second single battery at the other end in the second direction; The functional cavity of the first single cell in one group of the battery packs is connected to the functional cavity of the first single cell in an adjacent battery pack through the second adapter tube; the box body is provided with a main connector, and the adapter assembly also includes a third adapter tube, and the end of the second single cell in the first direction is provided with a connector connected to the functional cavity, and the connector of the second single cell is connected to the main connector through the third adapter tube.

5. The battery pack according to claim 2, characterized in that: The battery pack includes a first battery group and a second battery group; the box body is provided with a first main connector and a second main connector; the end of the single battery in the first direction is provided with a connector connected to the functional cavity; the adapter assembly also includes a third adapter tube; The connector of at least one single cell in the first battery pack is connected to the first main connector via the third adapter tube, and the connector of at least one single cell in the second battery pack is connected to the second main connector via the third adapter tube.

6. The battery pack according to claim 1, characterized in that: The shell body includes a shell body and a cover body assembly; an opening connected to its internal space is formed at the end of the shell body; the cover body assembly includes a cover body and a pole, and the cover body is covered on the opening so that the cover body and the shell body cooperate to enclose the battery cell cavity and the functional cavity; the single battery also includes a connector, and the pole and the connector are both arranged on the cover body, and the functional cavity is connected to the adapter assembly through the connector.

7. The battery pack according to claim 6, characterized in that: The shell body is provided with openings at opposite ends thereof, each opening is covered with the cover assembly, and each cover assembly is provided with the joint.

8. The battery pack according to claim 1, characterized in that: The box body is provided with a main connector, and the functional cavity of the single cell is also connected to the main connector through the adapter assembly; the gas in the cell cavity of the single cell is discharged to the functional cavity through the explosion-proof valve and discharged to the outside of the box body via the main connector, and / or the main connector is used to input heat exchange fluid into the functional cavity of the single cell.

9. The battery pack according to claim 1, characterized in that: The battery pack further comprises: A heat exchange plate is arranged on one side of the single battery, and the heat exchange plate is used for performing heat exchange with the single battery.

10. A single cell battery, characterized in that: include: A shell body, wherein a partition is disposed inside the shell body, and the partition separates the internal space of the shell body into a battery cell cavity and a functional cavity; The partition is provided with an explosion-proof valve; A battery cell, disposed in the battery cell cavity; as well as A connector is arranged on the shell, the connector is communicated with the functional cavity, and the connector is also communicated with the outside of the shell.

Images