Battery and vehicle with same

Abstract

The utility model provides a battery and a vehicle with the battery, the battery comprises a battery shell (1), the battery shell (1) comprises a linear wall structure, the linear wall structure comprises two first plate bodies (2) arranged oppositely, the plane where the first plate bodies (2) are located is parallel to the large surface of the battery, the battery shell (1) further comprises two second plate bodies (3), and the two second plate bodies (3) are arranged oppositely. The two second plate bodies (3) are respectively arranged at two end parts in the length direction of the linear wall structure, each second plate body (3) is connected with the two first plate bodies (2), the two first plate bodies (2) and the two second plate bodies (3) jointly define a mounting space for accommodating a winding battery cell (8), each second plate body (3) is of an arc-shaped structure, and each second plate body (3) is connected with the corresponding first plate body (2). And a first transition structure is formed at the joint of the first plate body (2) and the second plate body (3). The problem of abnormal phenomena such as lithium precipitation of the battery caused by unreasonable structural design of the battery in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery structure design, in particular to a battery and a vehicle with the same. Background Art

[0002] Most square aluminum shell batteries have wound cells inside. The four corners of the wound cells are rounded, while the four corners of the square aluminum shell are right angles. During the charge and discharge process, the stress changes due to the change in the thickness of the electrode. At the same time, the aluminum shell is right angles all around and cannot provide effective support. Eventually, wrinkles will appear after multiple cycles, and abnormal phenomena such as lithium deposition will occur.

[0003] With respect to the above-mentioned problems in the prior art, no effective solution has been proposed yet. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery and a vehicle having the same, so as to solve the problem in the prior art that the unreasonable battery structure design leads to abnormal phenomena such as lithium deposition in the battery.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery is provided, including: a battery case, the battery case includes a straight wall structure, the straight wall structure includes two oppositely arranged first plates, the plane where the first plates are located is parallel to the large surface of the battery, the battery case also includes two second plates, the two second plates are respectively arranged at the two ends of the length direction of the straight wall structure, each second plate is connected to the two first plates, the two first plates and the two second plates are jointly enclosed to form an installation space for accommodating wound battery cells, and the second plate is an arc-shaped structure so that a first transition structure is formed at the connection between the first plate and the second plate.

[0006] Furthermore, the battery housing includes: a battery cover plate, which is located on the top of the battery housing, and the battery cover plate includes a straight line segment and two arc segments located at both ends of the straight line segment to form a second transition structure between the straight line segment and the arc segment.

[0007] Further, the first transition structure is a first rounded corner, and / or the second transition structure is a second rounded corner.

[0008] Further, along the height direction of the battery housing, the projections of the first rounded corner and the second rounded corner are arranged to overlap.

[0009] Furthermore, along the height direction of the battery housing, the projection of the second plate body is an arc segment of a semicircle.

[0010] Furthermore, when the wound battery cell is installed in the installation space, the first transition structure is configured to match the outer contour of the wound battery cell at a corresponding position.

[0011] Furthermore, two pole tabs are arranged on the wound battery core, and the pole tabs extend through the straight wall structure toward the outside of the battery casing.

[0012] Furthermore, when the wound battery cell is installed in the installation space, there is a gap between the two second plates and the corresponding ends of the wound battery cell in the length direction, and the gap forms an air cooling channel.

[0013] Furthermore, the battery housing is made of aluminum material.

[0014] According to one aspect of the utility model, a vehicle is provided, comprising a battery, wherein the battery is the battery described above.

[0015] By applying the technical solution of the utility model, the second plate body is made into an arc structure, so that the first transition structure is formed at the connection between the first plate body and the second plate body. This arrangement makes the corners of the battery shell fit with the rounded corner structures of the wound battery core, thereby providing effective support for the battery core, and no wrinkles, lithium deposition and other abnormal phenomena will occur after multiple cycles. The technical solution of the application effectively solves the problem of abnormal phenomena such as lithium deposition in the battery caused by unreasonable battery structure design in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a first embodiment of a battery according to the utility model is shown;

[0018] Figure 2 A schematic structural diagram of a second embodiment of a battery according to the utility model is shown;

[0019] Figure 3 A schematic structural diagram of a third embodiment of a battery according to the utility model is shown;

[0020] Figure 4 A structural schematic diagram of a fourth embodiment of a battery according to the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 1. Battery shell; 2. First plate; 3. Second plate; 4. Battery cover; 5. Straight line segment; 6. Arc line segment; 7. Tab; 8. Wound battery cell. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0027] Combination Figures 1 to 4 As shown, according to a specific embodiment of the present application, a battery is provided, including: a battery case 1, the battery case 1 includes a straight wall structure, the straight wall structure includes two oppositely arranged first plates 2, the plane where the first plates 2 are located is parallel to the large surface of the battery, the battery case 1 also includes two second plates 3, the two second plates 3 are respectively arranged at the two ends of the length direction of the straight wall structure, each second plate 3 is connected to the two first plates 2, the two first plates 2 and the two second plates 3 are jointly enclosed to form an installation space for accommodating the wound battery cell 8, and the second plate 3 is an arc-shaped structure so that the connection between the first plate 2 and the second plate 3 forms a first transition structure.

[0028] By applying the technical solution of the utility model, the second plate body 3 is formed into an arc structure, so that the first transition structure is formed at the connection between the first plate body 2 and the second plate body 3. The corners of the battery housing 1 are adapted to the rounded corner structures of the wound battery cell 8, thereby providing effective support for the battery cell, and no wrinkles, lithium deposition and other abnormal phenomena will occur after multiple cycles. The technical solution of the application effectively solves the problem of abnormal phenomena such as lithium deposition in the battery caused by unreasonable battery structure design in the prior art.

[0029] Furthermore, the battery housing includes: a battery cover plate 4, which is located on the top of the battery housing 1, and the battery cover plate 4 includes a straight line segment 5 and two arc segments 6 located at both ends of the straight line segment to form a second transition structure between the straight line segment 5 and the arc segment 6.

[0030] By improving the structure of the battery cover 4, it can be adapted to the new battery housing 1 to ensure the sealing of the connection between the two.

[0031] Further, the first transition structure is a first rounded corner, and / or the second transition structure is a second rounded corner.

[0032] The first transition structure and the second transition structure may be configured identically or may be designed differently.

[0033] Furthermore, along the height direction of the battery housing 1 , the projections of the first rounded corner and the second rounded corner are arranged to overlap.

[0034] Furthermore, along the height direction of the battery housing 1 , the projection of the second plate 3 is an arc segment of a semicircle.

[0035] By adopting the technical solution of the present application and making the four corners of the shell into rounded corners, the contact between the wound core and the shell can be improved, providing continuous fitting force during use and increasing the cycle life of the battery cell; the weight of the shell can be reduced and the energy density of the battery cell can be increased.

[0036] Furthermore, when the wound battery cell 8 is installed in the installation space, the first transition structure is configured to match the outer contour of the wound battery cell 8 at a corresponding position.

[0037] Furthermore, two pole tabs 7 are provided on the wound battery core 8 , and the pole tabs 7 extend through the straight wall structure toward the outside of the battery housing 1 .

[0038] Furthermore, when the wound battery cell 8 is installed in the installation space, there is a gap between the two second plates 3 and the corresponding ends of the wound battery cell 8 in the length direction, and the gap forms an air cooling channel. In other words, after the new battery cell is assembled into a module, there is a gap between the corners of the battery cell, and the battery cell system can be cooled by air cooling, which reduces the difficulty of adjusting the temperature of the module.

[0039] In a specific embodiment of the present application, a method for manufacturing a battery is also provided, comprising:

[0040] 1. After the normal production of the core is hot pressed, it goes through a series of assemblies and then puts into the new shell;

[0041] 2. Pre-weld and fully weld the cover plate and the coil core after entering the shell; test the sealing performance;

[0042] 3. Continue to fill the battery with liquid and let it stand for aging and refilling. Then weigh the battery. Compared with the battery cell assembled with traditional shell and cover, the weight is reduced.

[0043] 4. Continue to group this batch of batteries according to capacity, extract the fixture on the battery cell to test the battery cell cycle life. The cycle life will be longer than the battery cell produced by the original shell cover.

[0044] Through analysis and testing of the assembled products, it was found that the battery cells produced with the new shell cover and the battery cells produced with the traditional shell cover were disassembled after 500 cycles. The battery cells produced with the new shell cover had fewer wrinkles than the traditional battery cells.

[0045] Furthermore, the battery housing 1 is made of aluminum material.

[0046] From the above description, it can be seen that the above embodiment of the utility model achieves the following technical effects: changing the four corners of the aluminum shell to rounded corners can improve such problems, delay the occurrence of battery abnormalities, and also reduce the weight of the battery, which is of great significance for safe use and cost reduction. It solves the following technical problems:

[0047] 1. Solve the problems of wrinkles and lithium deposition caused by large changes in the stress between the core and the shell during battery recycling.

[0048] 2. It can reduce the cost of structural parts, reduce the weight of battery cells and increase energy density.

[0049] 3. After the module is assembled, a gap can be left for ventilation and heat dissipation.

[0050] The battery in the above embodiment can be used in various types of vehicles such as new energy vehicles and traditional internal combustion vehicles.

[0051] New energy vehicles refer to vehicles that use renewable energy as a power source. Compared with traditional fuel vehicles, new energy vehicles have lower tail gas emissions and higher energy efficiency, and are regarded as an important way to solve environmental pollution and energy crisis problems. New energy vehicles are mainly divided into two types: electric vehicles and hybrid vehicles. Electric vehicles use batteries or fuel cells as power sources, completely eliminating tail gas emissions, and have the characteristics of zero emissions and low noise. Hybrid vehicles are equipped with fuel engines and electric motors at the same time, and use intelligent control systems to achieve the coordinated work of the two power sources to achieve higher fuel economy. With the advancement of science and technology and the government's support for the environmental protection industry, new energy vehicles have developed rapidly around the world. Many countries have introduced various policies to encourage the development of new energy vehicles, such as reducing car purchase taxes and providing charging infrastructure. At the same time, the technology of new energy vehicles is also constantly innovating and improving, the battery capacity is gradually increasing, the cruising range is constantly improving, and the charging time is also shortening. In addition to the advantages of environmental protection and energy efficiency, new energy vehicles also have certain economic advantages. Although the purchase cost of new energy vehicles is relatively high, the cost of use is low. According to calculations, the cost per kilometer of new energy vehicles is only about half of that of traditional fuel vehicles, which can save a lot of fuel costs.

[0052] Using the technical solution of the present application, there is also provided a new energy vehicle, comprising a battery, wherein the battery is the battery in the above embodiment.

[0053] Traditional internal combustion vehicles refer to vehicles that use traditional fuel engines as their power source. It is one of the most commonly used types of vehicles.

[0054] Traditional internal combustion vehicles usually consist of the following parts:

[0055] 1. Engine: Traditional internal combustion vehicles use fuel engines as their main power source. The engine generates energy by burning fuel and converts it into mechanical energy to drive the vehicle.

[0056] 2. Fuel system: The fuel system is responsible for transporting fuel from the fuel tank to the engine and ensuring the proper supply of fuel.

[0057] 3. Transmission system: The transmission system transmits the power of the engine to the wheels to propel the vehicle forward. Traditional internal combustion vehicles usually use traditional mechanical transmission systems, such as manual transmissions or automatic transmissions.

[0058] 4. Emission system: The emission system is responsible for treating the exhaust gas produced by engine combustion and discharging it into the atmosphere. These systems usually include catalysts and exhaust systems.

[0059] 5. Cooling system: The cooling system controls the temperature of the engine by circulating coolant to prevent overheating and damage.

[0060] 6. Electrical system: The electrical system provides power to various electronic devices of the vehicle, such as lights, audio, air conditioning, etc.

[0061] The advantages of traditional internal combustion vehicles include: 1. Mature technology: The technology of traditional internal combustion vehicles is relatively mature, and the production and maintenance costs are low. 2. Convenience: Traditional internal combustion vehicles are easy to refuel, gas stations are relatively common, and the driving range is long. 3. Strong power: The engine power output of traditional internal combustion vehicles is high, and the acceleration performance is good.

[0062] Using the technical solution of the present application, there is also provided an internal combustion vehicle, comprising a battery, wherein the battery is the battery in the above embodiment.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present utility model.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery, characterized in that: include: A battery casing (1), the battery casing (1) comprising a straight wall structure, the straight wall structure comprising two first plates (2) arranged opposite to each other, the plane where the first plates (2) are located is parallel to the large surface of the battery, the battery casing (1) further comprising two second plates (3), the two second plates (3) being arranged at two ends of the length direction of the straight wall structure respectively, each second plate (3) being connected to the two first plates (2), the two first plates (2) and the two second plates (3) being jointly arranged to form an installation space for accommodating a wound battery cell (8), the second plate (3) being an arc-shaped structure so that a first transition structure is formed at the connection between the first plate (2) and the second plate (3).

2. The battery according to claim 1, characterized in that The battery housing comprises: A battery cover plate (4), the battery cover plate (4) being located on the top of the battery housing (1), the battery cover plate (4) comprising a straight line segment (5) and two arc segments (6) located at both ends of the straight line segment, so that a second transition structure is formed between the straight line segment (5) and the arc segments (6).

3. The battery according to claim 2, characterized in that The first transition structure is a first rounded corner, and / or the second transition structure is a second rounded corner.

4. The battery according to claim 3, characterized in that Along the height direction of the battery housing (1), the projections of the first rounded corner and the second rounded corner are arranged to overlap.

5. The battery according to claim 1, characterized in that Along the height direction of the battery housing (1), the projection of the second plate body (3) is an arc segment of a semicircle.

6. The battery according to claim 1, characterized in that When the wound battery core (8) is installed in the installation space, the first transition structure is arranged to match the outer contour of the wound battery core (8) at a corresponding position.

7. The battery according to claim 3, characterized in that The wound battery core (8) is provided with two pole lugs (7), and the pole lugs (7) pass through the straight line segment (5) and extend toward the outside of the battery housing (1).

8. The battery according to claim 1, characterized in that When the wound battery core (8) is installed in the installation space, there is a gap between the two second plates (3) and the corresponding ends of the wound battery core (8) in the length direction, and the gap forms an air cooling channel.

9. The battery according to claim 1, characterized in that The battery housing (1) is made of aluminum material.

10. A vehicle comprising a battery, characterized in that: The battery is the battery according to any one of claims 1 to 9.

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