A battery, a battery module, a battery system and an electric vehicle

Abstract

The application discloses a battery, a battery module, a battery system and an electric vehicle, and relates to the technical field of batteries. The battery comprises a battery cell, a first cover plate and a second cover plate, the first cover plate and the second cover plate are arranged at two ends of the battery cell along an X-axis direction, and the first cover plate and the second cover plate are detachably connected, so that a plurality of batteries can be sequentially spliced along the X-axis direction and a Z-axis direction. The splicing of the plurality of batteries determines the splicing number of the batteries according to the actual size of the battery system, so that a battery module with a proper size is spliced, and the cost required for directly producing the battery module with the required size is reduced. Since the battery is connected with adjacent batteries arranged along the X-axis direction and adjacent batteries arranged along the Z-axis direction, the battery module formed by splicing has good structural stability. The splicing of the batteries improves the loading capacity of the whole battery system while reducing the cost.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery, a battery module, a battery system, and an electric vehicle. Background Technology

[0002] With increasing awareness of environmental protection and energy conservation, the demand for electric vehicles is gradually increasing, and the battery system is a major factor affecting the driving range of electric vehicles. Therefore, maximizing the battery capacity of the entire battery system while minimizing costs within the limited space of the battery system has always been a technical challenge. Summary of the Invention

[0003] The first objective of this invention is to provide a battery that, through splicing batteries together, increases the total battery capacity of the entire battery system while minimizing cost and ensuring reliability.

[0004] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows:

[0005] A battery includes a cell, a first cover plate, and a second cover plate. The first cover plate and the second cover plate are respectively disposed at both ends of the cell along the X-axis direction. The first cover plate and the second cover plate are detachably connected so that multiple batteries can be sequentially spliced ​​along the X-axis direction and the Z-axis direction, respectively.

[0006] As an alternative battery solution, a first splicing protrusion is provided on the end face of the first cover plate, and a first splicing groove is provided on the end face of the second cover plate. Multiple batteries can be spliced ​​sequentially along the X-axis by engaging the first splicing protrusion with the first splicing groove. After splicing, the joint between the first splicing protrusion of the battery and the first splicing groove of the adjacent battery is laser welded.

[0007] As an alternative battery solution, the edge of the first cover plate is provided with a second splicing protrusion and a third splicing groove at intervals. The second splicing protrusion extends along the Z-axis direction, and the edge of the second cover plate is provided with a second splicing groove and a third splicing protrusion at intervals. Multiple batteries can be spliced ​​sequentially along the Z-axis direction by engaging the second splicing protrusion with the second splicing groove and engaging the third splicing protrusion with the third splicing groove.

[0008] As an alternative battery solution, at least one of the first cover plate and the second cover plate is provided with a positioning groove, and the battery cell can abut against the bottom of the positioning groove.

[0009] As an alternative battery option, the battery also includes an aluminum casing, which is fitted over the battery cell. The aluminum casing is a square structure with openings at both ends, and the first cover plate and the second cover plate are respectively disposed on the two openings.

[0010] As an alternative battery option, the battery also includes an explosion-proof valve disposed on the aluminum casing for depressurizing the cell and connecting to the depressurization channel of the battery system.

[0011] As an alternative battery solution, multiple explosion-proof valves are provided, and the multiple explosion-proof valves are spaced apart on the aluminum shell along the X-axis direction.

[0012] The beneficial effects of this invention are as follows: This invention provides a battery in which multiple batteries can be spliced ​​together along the X-axis and Z-axis directions respectively through the detachable connection of a first cover plate and a second cover plate. This allows the number of batteries to be spliced ​​together to determine the actual size of the battery system, thus creating a battery module of suitable size and reducing the cost required to directly produce a battery module of the required size. Furthermore, since each battery can be connected to adjacent batteries arranged along the X-axis and adjacent batteries arranged along the Z-axis, the resulting battery module has good structural stability. This battery structure is simple, and by splicing the batteries together, it increases the overall battery system's capacity while minimizing cost and ensuring reliability.

[0013] The second objective of this invention is to propose a battery module that, by applying the above-mentioned splicing of batteries, increases the load capacity of the entire battery system while minimizing costs and ensuring reliability.

[0014] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows:

[0015] A battery module includes multiple batteries as described above, wherein the multiple batteries are sequentially spliced ​​along the X-axis and Z-axis directions respectively.

[0016] The beneficial effects of the present invention are as follows: The present invention provides a battery module that, by applying the above-mentioned splicing of batteries, increases the load capacity of the entire battery system while minimizing costs and ensuring reliability.

[0017] The third objective of this invention is to provide a battery system that, by applying the aforementioned battery module, can increase the overall battery capacity while minimizing cost and ensuring reliability.

[0018] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows:

[0019] A battery system includes a housing and a battery module as described above, the battery module being placed inside the housing.

[0020] The beneficial effects of the present invention are as follows: The present invention provides a battery system that, by applying the above-mentioned battery module, can increase the loaded capacity of the entire battery system while minimizing costs and ensuring reliability.

[0021] The fourth objective of this invention is to provide an electric vehicle that, by applying the above-described battery system, can increase the total battery capacity of the battery system while minimizing costs and ensuring reliability.

[0022] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows:

[0023] An electric vehicle includes a vehicle body and a battery system as described above, the battery system being disposed on the vehicle body.

[0024] The beneficial effects of the present invention are as follows: The present invention provides a battery system that, by applying the above-mentioned battery system, can increase the loaded capacity of the entire battery system while minimizing costs and ensuring reliability.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the battery module provided in a specific embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the battery structure provided in a specific embodiment of the present invention. Figure 1 ;

[0028] Figure 3 This is a schematic diagram of the battery structure provided in a specific embodiment of the present invention. Figure 2 ;

[0029] Figure 4 This is a schematic diagram of the battery structure spliced ​​along the X-axis direction according to a specific embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the battery structure spliced ​​along the Z-axis direction according to a specific embodiment of the present invention.

[0031] Figure label:

[0032] 1. Battery;

[0033] 11. First cover plate; 111. First splicing boss; 112. Second splicing boss; 113. Third splicing groove; 114. Positioning groove;

[0034] 12. Second cover plate; 121. First splicing groove; 122. Second splicing groove; 123. Third splicing boss; 13. Aluminum shell; 14. Explosion-proof valve. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of the invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are only used for descriptive distinction and have no special meaning. The terms "first position" and "second position" refer to two different positions.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1 As shown, this embodiment provides an electric vehicle, including a vehicle body and a battery system. The battery system is mounted on the vehicle body and provides power to the vehicle body to drive its movement. The battery system includes a housing and battery modules. The battery modules are placed inside the housing for fixation and protection. Specifically, the battery module includes multiple batteries 1, which are sequentially assembled along the X-axis and Z-axis directions, forming a matrix arrangement to provide the electric vehicle with the required power.

[0041] Among them, combined Figure 2 and Figure 3 As shown, the battery 1 includes a cell, a first cover plate 11 and a second cover plate 12. The first cover plate 11 and the second cover plate 12 are respectively disposed at both ends of the cell along the X-axis direction. The first cover plate 11 and the second cover plate 12 are detachably connected so that multiple batteries 1 can be sequentially spliced ​​along the X-axis direction and the Z-axis direction respectively.

[0042] It is understandable that the detachable connection between the first cover plate 11 and the second cover plate 12 allows multiple batteries 1 to be spliced ​​along the X-axis and Z-axis directions respectively. This allows the number of batteries 1 to be spliced ​​according to the actual size of the battery system, thus creating a battery module of suitable size and reducing the cost of directly producing a battery module of the required size. Furthermore, since each battery 1 can be connected to adjacent batteries 1 arranged along the X-axis and adjacent batteries 1 arranged along the Z-axis, the resulting battery module has good structural stability. To ensure convenient series connection and splicing between batteries 1, in this embodiment, the first cover plate 11 is located at the negative terminal of the battery cell, and the second cover plate 12 is located at the positive terminal of the battery cell. The battery cell has a cuboid structure.

[0043] Specifically, such as Figures 2 to 4As shown, a first splicing protrusion 111 is provided on the end face of the first cover plate 11, and a first splicing groove 121 is provided on the end face of the second cover plate 12. Multiple batteries 1 are sequentially spliced ​​along the X-axis direction by engaging the first splicing protrusion 111 with the first splicing groove 121. Specifically, the first splicing protrusion 111 of the first cover plate 11 at one end of battery 1 engages with the first splicing groove 121 of the second cover plate 12 of the adjacent battery 1, and the first splicing groove 121 of the second cover plate 12 at the other end of battery 1 engages with the first splicing protrusion 111 of the first cover plate 11 of another adjacent battery 1, thereby forming a splicing arrangement of multiple batteries 1 along the X-axis direction. For example, the first splicing groove 121 can be a rectangular groove, a trapezoidal groove, or a dovetail groove, as long as it can ensure the limiting of the battery 1 in the Y-axis and Z-axis directions. This embodiment does not impose specific limitations on this. For example, the first splicing boss 111 is made of aluminum, aluminum alloy or plastic, which is aesthetically pleasing and has strong corrosion resistance, and can improve the weight of battery 1.

[0044] Furthermore, the joint between the first splicing boss 111 of the spliced ​​battery 1 and the first splicing groove 121 of the adjacent battery 1 is laser welded, which not only improves the assembly strength between the batteries 1 spliced ​​along the X-axis, but also eliminates the need for connecting pieces between adjacent cells, saving materials and improving the volumetric energy density of the entire battery system.

[0045] For ease of manufacturing, the first splicing boss 111 and the first cover plate 11 are integrally formed structures.

[0046] Similarly, such as Figure 2 , Figure 3 and Figure 5As shown, the edge of the first cover plate 11 is provided with a second splicing boss 112 and a third splicing groove 113 at intervals. The second splicing boss 112 extends along the Z-axis direction. The edge of the second cover plate 12 is provided with a second splicing groove 122 and a third splicing boss 123 at intervals. Multiple batteries 1 can be spliced ​​sequentially along the Z-axis direction by engaging the second splicing boss 112 with the second splicing groove 122 and engaging the third splicing boss 123 with the third splicing groove 113. The first splicing groove 121 is located between the second splicing groove 122 and the third splicing boss 123. Specifically, the second splicing protrusion 112 of the first cover plate 11 at one end of battery 1 engages with the second splicing groove 122 of the second cover plate 12 of the adjacent battery 1, and the third splicing groove 113 of the first cover plate 11 engages with the third splicing protrusion 123 of the second cover plate 12 of another adjacent battery 1. Similarly, the second splicing groove 122 of the second cover plate 12 at the other end of battery 1 engages with the second splicing groove 122 of the first cover plate 11 of the adjacent battery 1, and the third splicing protrusion 123 of the second cover plate 12 engages with the third splicing groove 113 of the first cover plate 11 of another adjacent battery 1, thereby forming a splicing of multiple batteries 1 along the Z-axis direction. For example, the second splicing groove 122 and the third splicing groove 113 can be rectangular grooves, trapezoidal grooves, or dovetail grooves, as long as they can ensure the limiting of the battery 1 in the X-axis and Y-axis directions. This embodiment does not impose specific limitations on this. For example, the second splicing boss 112 and the third splicing boss 123 are both made of aluminum, aluminum alloy or plastic, which are aesthetically pleasing and have strong corrosion resistance, and can improve the weight of battery 1.

[0047] Furthermore, the first cover plate 11 and the second cover plate 12 are laser-welded together to ensure the stability of the connection between the battery modules spliced ​​along the Y-axis.

[0048] For ease of manufacturing, the second splicing boss 112 and the first cover plate 11 are integrally formed, and the third splicing boss 123 and the second cover plate 12 are integrally formed.

[0049] In this embodiment, the battery 1 also includes an aluminum shell 13, which is fitted over the battery cell. The aluminum shell 13 is a square structure with open ends. The first cover plate 11 and the second cover plate 12 are respectively disposed on the two open ends, thereby protecting the battery cell through the aluminum shell 13, reducing direct collisions between adjacent battery cells and extending the service life of the battery 1.

[0050] Furthermore, at least one of the first cover plate 11 and the second cover plate 12 is provided with a positioning groove 114, which allows the battery cell to abut against the bottom of the positioning groove 114. This not only provides positioning for the battery cell when it is installed inside the aluminum shell 13, but also helps to reduce the weight of the entire battery 1. In this embodiment, to ensure the weight balance of the battery 1, the positioning groove 114 is provided on the first cover plate 11, and the first splicing boss 111 and the first positioning groove 114 are spaced apart along the Y-axis. The positioning groove 114 is located between the second splicing boss 112 and the third splicing groove 113.

[0051] Specifically, battery 1 also includes an explosion-proof valve 14, which is disposed on the aluminum casing 13 and used to release pressure from the battery cell, thereby ensuring the safety of battery 1 in use. In addition, compared with the prior art where the explosion-proof valve 14 is disposed on the end plate of battery 1, the explosion-proof valve 14 disposed on the aluminum casing 13 in this embodiment can increase the heat dissipation contact area of ​​the battery cell.

[0052] In addition, when batteries 1 are spliced ​​together along the X-axis and Z-axis to form a battery module, it can be ensured that the explosion-proof valve 14 of each battery 1 is on the same side of the battery module. This makes it convenient to set up a pressure relief channel connected to the explosion-proof valve 14 in the battery system. When a thermal safety accident occurs in a single battery cell, the pressure can be relieved smoothly through the pressure relief channel to avoid affecting other cells. This ensures the reliability of the battery module while minimizing the space of the entire battery system and improving space utilization.

[0053] Furthermore, multiple explosion-proof valves 14 are provided, and these multiple explosion-proof valves 14 are spaced apart along the X-axis on the aluminum shell 13 to further improve the heat dissipation capacity of the battery 1. It is understood that this embodiment does not impose specific limitations on the number and distribution of the explosion-proof valves 14, as long as they can serve a pressure relief function. For example, the battery 1 is provided with two explosion-proof valves 14, which are respectively located at both ends of one side of the aluminum shell 13.

[0054] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] 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, characterized in that, It includes a battery cell, a first cover plate (11) and a second cover plate (12). The first cover plate (11) and the second cover plate (12) are respectively disposed at both ends of the battery cell along the X-axis direction. The first cover plate (11) and the second cover plate (12) are detachably connected so that multiple batteries can be sequentially spliced ​​along the X-axis direction and the Z-axis direction respectively. The first cover plate (11) is provided with a first splicing boss (111) on its end face, and the second cover plate (12) is provided with a first splicing groove (121) on its end face. The first splicing boss (111) and the first splicing groove (121) are engaged to allow multiple batteries to be spliced ​​sequentially along the X-axis. The first cover plate (11) is provided with a second splicing boss (112) and a third splicing groove (113) at intervals along its edge. The second splicing boss (112) extends along the Z-axis direction. The second cover plate (12) is provided with a second splicing groove (122) and a third splicing boss (123) at intervals along its edge. The second splicing boss (112) is engaged with the second splicing groove (122), and the third splicing boss (123) is engaged with the third splicing groove (113), so that multiple batteries can be spliced ​​sequentially along the Z-axis direction.

2. The battery according to claim 1, characterized in that, After splicing, the joint between the first splicing boss (111) of the battery and the first splicing groove (121) of the adjacent battery is laser welded.

3. The battery according to any one of claims 1 and 2, characterized in that, At least one of the first cover plate (11) and the second cover plate (12) is provided with a positioning groove (114), and the battery cell can abut against the bottom of the positioning groove (114).

4. The battery according to any one of claims 1 and 2, characterized in that, The battery also includes an aluminum shell (13), which is fitted over the battery cell. The aluminum shell (13) is a square structure with open ends. The first cover plate (11) and the second cover plate (12) are respectively disposed on the two open ends.

5. The battery according to claim 4, characterized in that, The battery also includes an explosion-proof valve (14), which is disposed on the aluminum shell (13) and is used to depressurize the cell and connect to the depressurization channel of the battery system.

6. The battery according to claim 5, characterized in that, Multiple explosion-proof valves (14) are provided, and multiple explosion-proof valves (14) are spaced apart on the aluminum shell (13) along the X-axis direction.

7. A battery module, characterized in that, It includes a plurality of batteries as described in any one of claims 1 to 6, wherein the plurality of batteries are sequentially spliced ​​along the X-axis and Z-axis directions, respectively.

8. A battery system, characterized in that, It includes a housing and a battery module as described in claim 7, wherein the battery module is placed inside the housing.

9. An electric vehicle, characterized in that, It includes a vehicle body and a battery system as described in claim 8, wherein the battery system is disposed on the vehicle body.

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