Battery and electric equipment

Abstract

The battery comprises a battery cell, a first cover plate and a second cover plate, accommodating grooves recessed towards the battery cell are formed in the surfaces, deviating from the battery cell, of the first cover plate and the second cover plate respectively, a positive pole electrically connected with the battery cell is arranged in the accommodating groove of the first cover plate, and a negative pole electrically connected with the battery cell is arranged in the accommodating groove of the second cover plate. And a negative pole electrically connected with the battery cell is arranged in the accommodating groove of the second cover plate. According to the battery disclosed by the utility model, the accommodating grooves which are sunken towards the battery cell are formed in the surfaces, which are respectively deviated from the battery cell, of the first cover plate and the second cover plate, and the positive pole post and the negative pole post are arranged in the corresponding accommodating grooves, so that the space utilization rate of the battery is improved, and higher volume energy density can be realized.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a battery and an electrical device. Background Art

[0002] With the development of new energy vehicles, OEMs are gradually launching more and more new energy vehicle models. In order to meet the requirements for battery pack design, the powertrain is gradually becoming platform-based. While pursuing mass energy density, higher requirements are also placed on volume energy density. Therefore, single cells need to have higher volume energy density.

[0003] The pole is the key part of the single battery to realize the output and input of electric energy. In the single battery, the main function of the pole is to connect the positive and negative electrodes inside the battery to realize the transmission of electric energy.

[0004] In the existing single cell design, due to the protrusion of the pole, while ensuring the current flow area of ​​the pole, the space utilization of the battery is limited, thereby limiting the volume energy density of the single cell. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide a battery. According to the battery of the utility model, by providing a receiving groove recessed toward the battery cell on the surfaces of the first cover plate and the second cover plate respectively facing away from the battery cell, and arranging the positive electrode column and the negative electrode column in the corresponding receiving groove, the space utilization rate of the battery is improved, and a higher volume energy density can be achieved.

[0006] The utility model also provides an electrical device having the battery.

[0007] The battery according to the utility model includes: a shell, which is arranged to define a accommodating cavity and has a first opening and a second opening at both ends; a battery cell, which is arranged in the accommodating cavity; a first cover plate, which is arranged at one end of the battery cell in the length direction and closes the first opening; a second cover plate, which is arranged at the other end of the battery cell in the length direction and closes the second opening; wherein, the first cover plate and the second cover plate are respectively formed with accommodating grooves recessed toward the battery cell on their surfaces facing away from the battery cell, a positive electrode column electrically connected to the battery cell is arranged in the accommodating groove of the first cover plate, and a negative electrode column electrically connected to the battery cell is arranged in the accommodating groove of the second cover plate.

[0008] According to the battery of the utility model, the shell can protect the battery cell in the accommodating chamber, so that the battery cell works in a stable working environment. By providing a first cover plate and a second cover plate, the first cover plate closes the first opening, and the second cover plate closes the second opening, the electrolyte in the accommodating chamber can be effectively prevented from leaking, thereby improving the safety performance of the battery. By providing a accommodating groove recessed toward the battery cell on the surfaces of the first cover plate and the second cover plate respectively facing away from the battery cell, and arranging the positive pole column and the negative pole column in the corresponding accommodating groove, the protrusion of the pole column can be effectively reduced, thereby reducing the limitation of the pole column on the battery space utilization rate, improving the battery space utilization rate, and achieving a higher volume energy density. The positive pole column and the negative pole column are respectively electrically connected to the battery cell to form a current circuit of the battery. The current flows into the battery cell from the positive pole column and flows out of the battery cell from the negative pole column, thereby realizing the conduction of the current.

[0009] According to some embodiments of the present invention, surfaces of the first cover plate and the second cover plate facing away from the battery cell are respectively configured as mating surfaces, and the end surface of the pole is flush with the mating surfaces.

[0010] According to some embodiments of the present invention, the height of the positive electrode column and the height of the negative electrode column are h, the depth of the accommodating groove is s and satisfies: h≤s.

[0011] According to some embodiments of the present invention, in a projection along the length direction of the battery cell, the accommodating grooves of the first cover plate and the accommodating grooves of the second cover plate are arranged alternately.

[0012] According to some embodiments of the present invention, in the width direction of the battery cell, the accommodating groove of the first cover plate is arranged adjacent to one side edge of the first cover plate, and the accommodating groove of the second cover plate is arranged adjacent to the other side edge of the second cover plate.

[0013] According to some embodiments of the present invention, the length of the battery cell is L, the width of the battery cell is D and satisfies: 1 / 6≤D / L≤1 / 4, and the thickness of the battery cell is S and satisfies: 1 / 7≤S / D≤1 / 5.

[0014] According to some embodiments of the present invention, the length of the battery core is L and satisfies: L≤600mm.

[0015] According to some embodiments of the present invention, an explosion-proof valve is provided on the second cover plate, and the explosion-proof valve is suitable for selectively connecting the outside with the accommodating cavity.

[0016] According to some embodiments of the present invention, the positive electrode post is connected to the first cover plate by riveting, and the negative electrode post is connected to the second cover plate by riveting.

[0017] The electrical equipment according to the utility model is briefly described below.

[0018] The electric device according to the utility model includes the battery described in any one of the above embodiments. Since the electric device according to the utility model includes the battery described in any one of the above embodiments, the electric device according to the utility model can obtain higher volume energy density and higher space utilization, while the working environment is stable and the safety performance of the battery is improved.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a schematic diagram of the cooperation between the battery cell and the first end plate of a battery according to an embodiment of the utility model;

[0022] Figure 2 It is a schematic diagram of the cooperation between the housing, the first end plate and the second end plate of a battery according to one embodiment of the utility model;

[0023] Figure 3 is a schematic diagram of a first end plate of a battery according to an embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of a second end plate of a battery according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Shell 11, accommodating chamber 111;

[0027] Battery cell 12;

[0028] A first cover plate 13, a positive electrode column 131;

[0029] A second cover plate 14, a negative electrode column 141;

[0030] Accommodating groove 15. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the related art, in the existing single cell design, due to the protrusion of the pole, while ensuring the current flow area of ​​the pole, the space utilization of the battery is subject to certain restrictions, thereby limiting the volume energy density of the single cell.

[0033] Reference below Figure 1-Figure 4 A battery according to an embodiment of the present invention is described.

[0034] like Figure 1 and Figure 2 As shown, the battery according to the utility model includes a shell 11, a battery cell 12, a first cover plate 13 and a second cover plate 14, the shell 11 is arranged around to define a accommodating cavity 111 and a first opening and a second opening are formed at both ends respectively; the battery cell 12 is arranged in the accommodating cavity 111; the first cover plate 13 is arranged at one end of the battery cell 12 in the length direction and closes the first opening; the second cover plate 14 is arranged at the other end of the battery cell 12 in the length direction and closes the second opening; wherein, the first cover plate 13 and the second cover plate 14 are respectively formed with an accommodating groove 15 recessed toward the battery cell 12 on the surface away from the battery cell 12, a positive electrode column 131 electrically connected to the battery cell 12 is arranged in the accommodating groove 15 of the first cover plate 13, and a negative electrode column 141 electrically connected to the battery cell 12 is arranged in the accommodating groove 15 of the second cover plate 14.

[0035] In the battery of the present application, the housing 11 can protect the battery cell 12 in the accommodating cavity 111, so that the battery cell 12 can work in a stable working environment. By providing the first cover plate 13 and the second cover plate 14, the first cover plate 13 closes the first opening, and the second cover plate 14 closes the second opening, the electrolyte in the accommodating cavity 111 can be effectively prevented from leaking, and the safety performance of the battery can be improved. By providing the accommodating groove 15 recessed toward the battery cell 12 on the surface of the first cover plate 13 and the second cover plate 14 respectively away from the battery cell 12, and arranging the positive pole 131 and the negative pole 141 in the corresponding accommodating groove 15, the protrusion of the pole can be effectively reduced, thereby reducing the limitation of the pole on the battery space utilization, improving the battery space utilization, and achieving a higher volume energy density. The positive pole 131 and the negative pole 141 are electrically connected to the battery cell 12 respectively to form a current loop of the battery. The current flows from the positive pole 131 into the battery cell 12, and flows out of the battery cell 12 from the negative pole 141, thereby realizing the conduction of the current.

[0036] Therefore, the battery of the present application improves the space utilization of the battery and can achieve a higher volume energy density by arranging a receiving groove 15 recessed toward the battery cell 12 on the surfaces of the first cover plate 13 and the second cover plate 14 respectively facing away from the battery cell 12, and arranging the positive electrode column 131 and the negative electrode column 141 in the corresponding receiving groove 15.

[0037] According to some embodiments of the present invention, Figure 3 As shown, the surfaces of the first cover plate 13 and the second cover plate 14 facing away from the battery cell 12 are respectively configured as mating surfaces, and the end surface of the pole is flush with the mating surface. By making the end surface of the pole flush with the mating surface, the occupation of the battery space by the pole can be minimized, and a higher volume energy density can be achieved while maintaining stable battery performance, providing greater power output. In addition, the flush design of the pole and the mating surface can also improve the appearance of the battery, making the entire battery structure more compact and regular.

[0038] According to some embodiments of the utility model, the height of the positive pole 131 and the height of the negative pole 141 are h, and the depth of the receiving groove 15 is s and satisfies: h≤s. The height of the positive pole 131 and the height of the negative pole 141 are both represented by h, but the height of the positive pole 131 and the height of the negative pole 141 may be equal or unequal. There is a specific relationship between the height h of the positive pole 131 and the height h of the negative pole 141 and the depth s of the receiving groove 15, so that the positive pole 131 and the negative pole 141 can be completely accommodated in the receiving groove 15. Specifically, the depth s of the receiving groove 15 is greater than or equal to the height h of the pole (s≥h), which can further reduce the protrusion of the pole, reduce the restriction on the space utilization of the battery, improve the space utilization of the battery, and achieve a higher volume energy density.

[0039] According to some embodiments of the utility model, in the projection of the length direction of the battery cell 12, the receiving groove 15 of the first cover plate 13 and the receiving groove 15 of the second cover plate 14 are arranged in an interlaced manner. The interlaced arrangement of the receiving groove 15 of the first cover plate 13 and the receiving groove 15 of the second cover plate 14 means that in the projection of the length direction of the battery cell 12, the projections formed by the receiving groove 15 of the first cover plate 13 and the receiving groove 15 of the second cover plate 14 do not overlap, that is, the positive pole 131 and the negative pole 141 are respectively close to the two sides of the battery cell 12, which can conduct current more effectively. Specifically, when the current flows into the battery cell 12 from the positive pole 131, since the positive pole 131 is close to one side of the battery cell 12, the current can flow into the battery cell 12 faster, reducing resistance and energy loss. The current flowing into the battery cell 12 will flow from one side of the battery cell 12 to the other side of the battery cell 12 and flow out of the battery cell 12 from the negative pole 141. Similarly, when current flows out of the battery cell 12 from the negative electrode post 141 , since the negative electrode post 141 is close to the other side of the battery cell 12 , the current can flow out of the battery cell 12 faster, further improving the efficiency of current conduction.

[0040] According to some embodiments of the present invention, Figure 3 and Figure 4As shown, in the width direction of the battery cell 12, the receiving groove 15 of the first cover plate 13 is arranged near one side edge of the first cover plate 13, and the receiving groove 15 of the second cover plate 14 is arranged near the other side edge of the second cover plate 14. By arranging the receiving groove 15 of the first cover plate 13 near one side edge of the first cover plate 13 in the width direction of the battery cell 12, and arranging the receiving groove 15 of the second cover plate 14 near the other side edge of the second cover plate 14, the path of current conduction can be reduced, so that the current can flow into and out of the battery cell 12 faster, and the performance of the battery is optimized. Specifically, when the current flows into the battery cell 12 from the positive electrode column 131, since the positive electrode column 131 is closer to the edge of the battery cell 12, the current can flow into the battery cell 12 faster, reducing resistance and energy loss. Similarly, when the current flows out of the battery cell 12 from the negative electrode column 141, since the negative electrode column 141 is also close to the edge of the battery cell 12, the current can flow out of the battery cell 12 faster, further improving the efficiency of current conduction.

[0041] According to some embodiments of the utility model, the length of the battery cell 12 is L, the width of the battery cell 12 is D and satisfies: 1 / 6≤D / L≤1 / 4, and the thickness of the battery cell 12 is S and satisfies: 1 / 7≤S / D≤1 / 5. By adjusting the ratio of the length and width of the battery cell 12, that is, 1 / 6≤D / L≤1 / 4, the optimization between the volume and capacity of the battery cell 12 is achieved, which helps to improve the energy density of the battery and provide a longer cruising range for the vehicle. By limiting the ratio of the thickness S to the width D of the battery cell 12, that is, 1 / 7≤S / D≤1 / 5, it helps to balance the structural strength and weight of the battery cell 12 while ensuring the power density of the battery. By optimizing the size and structure of the battery cell 12, the safety and stability of the battery are improved. While maintaining lightweight, the battery has high energy storage capacity and fast discharge performance, and is suitable for various vehicle applications.

[0042] According to some embodiments of the utility model, the length of the battery cell 12 is L and satisfies: L≤600mm. By limiting the length of the battery cell 12 to less than 600mm, it helps to reduce the difficulty of manufacturing the battery cell 12, making the assembly of the battery pack more efficient and improving production efficiency. In addition, in vehicle design, limiting the length of the battery cell 12 to less than 600mm also helps to optimize the battery layout in the vehicle. The size of the battery cell 12 can better adapt to the structure and space limitations of the vehicle, so that the battery can be better integrated into the design of the vehicle.

[0043] According to some embodiments of the utility model, an explosion-proof valve is provided on the second cover plate 14, and the explosion-proof valve is suitable for selectively connecting the outside world with the accommodating chamber 111. The explosion-proof valve is a pressure regulating device, and the explosion-proof valve can sense the pressure change in the accommodating chamber 111. When the internal pressure of the battery increases, the explosion-proof valve will automatically open to allow the gas in the accommodating chamber 111 to be discharged, thereby reducing the internal pressure of the battery. By providing the explosion-proof valve, the internal pressure of the battery is effectively regulated, and the risk of thermal runaway or even explosion due to excessive internal pressure of the battery is reduced, thereby improving the safety performance of the battery. Since the location where the air pressure is generated inside the battery is at the positive electrode, by providing the explosion-proof valve on the second cover plate 14, the explosion-proof valve can better play its role and provide better safety protection for the battery.

[0044] According to some embodiments of the utility model, a liquid injection hole is provided on the first cover plate 13. By providing the liquid injection hole on the first cover plate 13, the electrolyte can be conveniently injected into the containing cavity 111 to enable the battery to work normally.

[0045] According to some embodiments of the utility model, the positive pole 131 is connected to the first cover plate 13 by riveting, and the negative pole 141 is connected to the second cover plate 14 by riveting. The positive pole 131 and the negative pole 141 are key components for current input and output. By riveting the positive pole 131 to the first cover plate 13 and riveting the negative pole 141 to the second cover plate 14, the riveting has the advantages of firm connection and strong durability, which can improve the connection strength and stability, make the current stable, and improve the reliability and service life of the battery.

[0046] The electrical equipment according to the utility model is briefly described below.

[0047] The electric device according to the utility model includes the battery in any one of the above embodiments. Since the electric device according to the utility model includes the battery in any one of the above embodiments, the electric device according to the utility model can obtain higher volume energy density and higher space utilization, while the working environment is stable and the safety performance of the battery is improved.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0050] In the description of the present invention, "plurality" means two or more.

[0051] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0052] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A battery, characterized in that: include: A shell (11), the shell (11) is arranged around to define a receiving cavity (111) and has a first opening and a second opening respectively formed at two ends; A battery core (12), the battery core (12) being arranged in the accommodating cavity (111); A first cover plate (13), the first cover plate (13) being arranged at one end of the battery core (12) in the length direction and closing the first opening; A second cover plate (14), the second cover plate (14) being arranged at the other end of the battery core (12) in the length direction and closing the second opening; Wherein, a receiving groove (15) recessed toward the battery cell (12) is formed on the surface of the first cover plate (13) and the second cover plate (14) respectively facing away from the battery cell (12); a positive electrode column (131) electrically connected to the battery cell (12) is arranged in the receiving groove (15) of the first cover plate (13); and a negative electrode column (141) electrically connected to the battery cell (12) is arranged in the receiving groove (15) of the second cover plate (14).

2. The battery according to claim 1, characterized in that The surfaces of the first cover plate (13) and the second cover plate (14) facing away from the battery cell (12) are respectively configured as mating surfaces, and the end surface of the pole is flush with the mating surface.

3. The battery according to claim 1, characterized in that The height of the positive electrode column (131) and the height of the negative electrode column (141) are h, and the depth of the containing groove (15) is s and satisfies: h≤s.

4. The battery according to claim 2, characterized in that In a projection of the length direction of the battery cell (12), the accommodating groove (15) of the first cover plate (13) and the accommodating groove (15) of the second cover plate (14) are arranged alternately.

5. The battery according to claim 4, characterized in that In the width direction of the battery cell (12), the accommodating groove (15) of the first cover plate (13) is arranged adjacent to one side edge of the first cover plate (13), and the accommodating groove (15) of the second cover plate (14) is arranged adjacent to the other side edge of the second cover plate (14).

6. The battery according to claim 1, characterized in that The length of the battery cell (12) is L, the width of the battery cell (12) is D and satisfies: 1 / 6≤D / L≤1 / 4, and the thickness of the battery cell (12) is S and satisfies: 1 / 7≤S / D≤1 / 5.

7. The battery according to claim 6, characterized in that The length of the battery core (12) is L and satisfies: L≤600 mm.

8. The battery according to claim 1, characterized in that The second cover plate (14) is provided with an explosion-proof valve, and the explosion-proof valve is suitable for selectively connecting the outside with the accommodating chamber (111).

9. The battery according to claim 1, characterized in that The positive electrode column (131) is connected to the first cover plate (13) by riveting, and the negative electrode column (141) is connected to the second cover plate (14) by riveting.

10. An electrical device, characterized in that: A battery comprising any one of claims 1 to 9.

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