Dummy battery cell and power battery

Abstract

The application discloses a false electric core and a power battery. The false electric core comprises a false electric core body, a connecting part, a connecting piece and end covers. The false electric core body is provided with a cavity. The connecting part is arranged in the cavity and extends along the length direction of the false electric core body. The connecting piece is connected with the outer surface of the connecting part and the inner wall of the cavity respectively. Two end covers are arranged and connected with two ends of the false electric core body respectively. The connecting part and the connecting piece are arranged in the false electric core body, the connecting piece is connected with the outer surface of the connecting part and the inner wall of the cavity respectively, and the end covers are connected with the two ends of the false electric core body, so that the extrusion resistance of each side and end of the false electric core is improved, and the power battery is prevented from being damaged easily during use.

Description

Technical Field

[0001] This application relates to the field of power battery technology, specifically to a dummy battery cell and a power battery having the dummy battery cell. Background Technology

[0002] Electric vehicles, with their advantages of high efficiency, energy saving, and low pollution, are gradually becoming the main direction of modern automotive development, and the power battery is the core component of electric vehicles. In related technologies, when applying power batteries to electric vehicles, it is necessary to consider the different power requirements of different models. Even for the same model, different power capacities may be required. To improve the versatility of power batteries, dummy cells can be used to adjust the battery capacity to meet the needs of different vehicle specifications. However, the dummy cell structure in these technologies has poor compressive strength, making power batteries with dummy cells prone to damage. Utility Model Content

[0003] In order to effectively overcome the problems existing in the prior art, the main purpose of this application is to provide a dummy cell that can improve the crush resistance and a power battery having the dummy cell.

[0004] To achieve the above objectives, this application specifically adopts the following technical solution:

[0005] This application provides a fake battery cell, the fake battery cell comprising:

[0006] A fake battery cell body, wherein the fake battery cell body is provided with a cavity;

[0007] A connecting portion is disposed within the cavity and extends along the length direction of the dummy battery cell body;

[0008] A connector, wherein the connector is connected to the outer surface of the connecting portion and the inner wall of the cavity respectively;

[0009] The device includes two end caps, which are respectively connected to both ends of the dummy battery cell body.

[0010] In some embodiments, a plurality of connectors are provided, and the plurality of connectors are distributed at circumferential intervals along the connection portion.

[0011] In some embodiments, the dummy cell body includes a plurality of sidewalls, each of which is connected to at least one of the connectors.

[0012] In some embodiments, the connecting portion is configured as a hollow structure.

[0013] In some embodiments, the dummy battery cell body, the connecting portion, and the connector are integrally formed by an extrusion molding process.

[0014] In some embodiments, the end cap is detachably connected to the dummy battery cell body.

[0015] In some embodiments, the end cap includes an end cap body and a first engaging portion, the first engaging portion being disposed on the periphery of the end cap body, and the first engaging portion being capable of engaging with the dummy battery cell body.

[0016] In some embodiments, the end cap body is provided as a rectangular structure, and multiple first engaging portions are provided, with the multiple first engaging portions respectively disposed at the four corners of the end cap body.

[0017] In some embodiments, the end cap further includes a second engaging portion disposed in the middle of the end cap body, the second engaging portion being capable of engaging with the connecting portion.

[0018] Accordingly, this application also provides a power battery, which includes a casing, a battery cell and a dummy battery cell. The casing is provided with a mounting cavity, and the battery cell and the dummy battery cell are respectively installed in the mounting cavity.

[0019] The dummy battery cell of this application includes a dummy battery cell body, a connecting portion, a connector, and end caps. The dummy battery cell body has a cavity, and the connecting portion is disposed within the cavity and extends along the length direction of the dummy battery cell body. The connector is connected to the outer surface of the connecting portion and the inner wall of the cavity, respectively. Two end caps are provided, and the two end caps are respectively connected to both ends of the dummy battery cell body. Compared with the prior art, this application improves the compressive strength of each side and end of the dummy battery cell by providing a connecting portion and a connector inside the dummy battery cell body, and by connecting the connector to the outer surface of the connecting portion and the inner wall of the cavity, and by connecting the end caps to both ends of the dummy battery cell body. This prevents the power battery from being easily damaged during use. Attached Figure Description

[0020] Figure 1 A perspective view of a dummy battery cell provided in an embodiment of this application.

[0021] Figure 2 An exploded perspective view of a dummy battery cell provided in an embodiment of this application.

[0022] Figure 3 This is a partial structural diagram of the power battery provided in an embodiment of this application.

[0023] Attached image labels:

[0024] 1. Dummy battery cell body; 11. First side wall; 12. Second side wall; 13. Third side wall; 14. Fourth side wall; 2. Connecting part; 3. Connecting piece; 4. End cap; 41. End cap body; 42. First engaging part; 43. Second engaging part; 100. Dummy battery cell; 200. Battery cell; 300. Housing. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0028] As the application fields of power batteries become increasingly broad, the market demand for differentiated power batteries is also increasing. For example, when applying power batteries to electric vehicles, it is necessary to consider the different power requirements of different models. Even for the same model, different power capacities are sometimes required. Therefore, when developing electric vehicles, relevant companies develop different power batteries based on the different power requirements of each model, leading to redundant development of power batteries and increasing R&D costs and time. To reduce costs, related technologies use dummy cells to adjust the battery capacity according to the power requirements of different models, thereby enabling the power battery to meet the power requirements of different models, improving the versatility of the power battery, and allowing multiple models to use power batteries with consistent shapes and contours, avoiding redundant development and saving R&D costs and time. However, the inventors of this application discovered during the R&D process that the dummy cells in the related technology have poor compressive strength, making the entire power battery prone to damage during use.

[0029] Reference Figure 1As shown, an embodiment of this application discloses a dummy battery cell 100, which includes a dummy battery cell body 1 and end caps 4. Two end caps 4 are provided, each connected to one end of the dummy battery cell body 1, forming a cuboid or cube structure. In application, the dummy battery cell 100 and the battery cell can be installed in the casing of the power battery according to the power requirements of different vehicle models. The dummy battery cell occupies space, thereby adjusting the battery capacity. Since the number of battery cells housed in a power battery is usually fixed, the battery capacity can be adjusted by using dummy battery cells to occupy space. For example, if the volume of the dummy battery cell inside the power battery increases, the number of battery cells inside the power battery will decrease, and the battery capacity will correspondingly decrease. Conversely, if the volume of the dummy battery cell inside the power battery decreases, the number of battery cells inside the power battery will increase, and the battery capacity will correspondingly increase. It should be noted that in this embodiment, dummy cells of different volumes can be made according to the different sizes of the space occupied, so that each power battery can be equipped with at most one dummy cell.

[0030] Reference Figure 2 As shown, the dummy battery cell 100 also includes a connecting portion 2 and a connecting member 3. The dummy battery cell body 1 has a cavity, and the connecting portion 2 is disposed within the cavity and extends along the length direction of the dummy battery cell body 1. The connecting member 3 is connected to the outer surface of the connecting portion 2 and the inner wall of the cavity, respectively. In this embodiment, by providing the connecting portion 2 and the connecting member 3 inside the dummy battery cell body 1, and connecting the connecting member 3 to the outer surface of the connecting portion 2 and the inner wall of the cavity, the compressive strength of the dummy battery cell 100 can be improved, preventing the power battery from being easily damaged during use.

[0031] Continue to refer to Figure 2 As shown, the dummy battery cell body 1 includes multiple sidewalls and multiple connectors 3. These connectors 3 are distributed at intervals along the circumference of the connecting portion 2, and each sidewall is connected to at least one connector 3. Exemplarily, the dummy battery cell body 1 includes a first sidewall 11, a second sidewall 12, a third sidewall 13, and a fourth sidewall 14. The first sidewall 11 and the third sidewall 13 are arranged opposite each other, and the second sidewall 12 and the fourth sidewall 14 are arranged opposite each other. The first sidewall 11, the second sidewall 12, the third sidewall 13, and the fourth sidewall 14 are interconnected to form a square column with a hollow structure. The end cap 4 is detachably connected to both ends of the dummy battery cell body 1 and the connecting portion 2. In this embodiment, by connecting the end cap 4 to both ends of the dummy battery cell body 1 and the connecting portion 2, the compressive strength of the two ends of the dummy battery cell can be improved.

[0032] In some embodiments, four connectors 3 are provided. One end of each connector 3 is connected to the connecting portion 2, and the other end of each connector 3 is connected to a sidewall. For example, the connector 3 includes a first connector, a second connector, a third connector, and a fourth connector. One end of each of the first, second, third, and fourth connectors is connected to the connecting portion 2, and the first, second, third, and fourth connectors are evenly distributed circumferentially along the connecting portion 2. The other end of the first connector is connected to the middle of the first sidewall 11, the other end of the second connector is connected to the middle of the second sidewall 12, the other end of the third connector is connected to the middle of the third sidewall 13, and the other end of the fourth connector is connected to the middle of the fourth sidewall 14. This embodiment improves the compressive strength of each sidewall of the dummy battery cell 100 by connecting connectors to each sidewall.

[0033] In some embodiments, the connecting portion 2 is a hollow cylinder, and the dummy battery body 1, the connecting portion 2, and the connector 3 are integrally formed by extrusion molding. In this embodiment, the dummy battery body 1, the connecting portion 2, and the connector 3 are integrally formed by extrusion molding, thereby improving the strength of the dummy battery.

[0034] Continue to refer to Figure 2 As shown, the end cap 4 includes an end cap body 41, a first engaging portion 42, and a second engaging portion 43. The first engaging portion 42 is disposed on the periphery of the end cap body 41 and can engage with the dummy battery cell body 1. The second engaging portion 43 is disposed in the middle of the end cap body 41 and can engage with the connecting portion 2. For example, the end cap body 41 is a rectangular structure, and multiple first engaging portions 42 are provided, each disposed at one of the four corners of the end cap body 41. This embodiment connects the end cap 4 to the dummy battery cell body 1 and the connecting portion 2 through an engaging method. This connection method is simple, easy to disassemble and install, and improves production efficiency.

[0035] Reference Figure 3 As shown, correspondingly, embodiments of this application also disclose a power battery, which includes a housing 300, a battery cell 200 and a dummy battery cell 100. The housing 300 is provided with an installation cavity, and the battery cell 200 and the dummy battery cell 100 are respectively installed in the installation cavity.

[0036] In some embodiments, the dummy cell 100 can be installed on the side of the mounting cavity of the housing 300, that is, the dummy cell 100 can be installed in a location where the power battery temperature is low.

[0037] In this embodiment, a dummy cell 100 is used as a placeholder to adjust the number of cells 200 in the power battery, thereby adjusting the battery capacity of the power battery, so that the power battery can meet the battery requirements of different vehicle models and improve the versatility of the power battery.

[0038] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fake battery cell, characterized in that, include: A fake battery cell body, wherein the fake battery cell body is provided with a cavity; A connecting portion is disposed within the cavity and extends along the length direction of the dummy battery cell body; A connector, wherein the connector is connected to the outer surface of the connecting portion and the inner wall of the cavity respectively; The device includes two end caps, which are respectively connected to both ends of the dummy battery cell body.

2. The fake battery cell according to claim 1, characterized in that, The connector is provided in multiple parts, and the multiple connectors are distributed at intervals along the circumference of the connecting part.

3. The fake battery cell according to claim 2, characterized in that, The dummy battery cell body includes multiple sidewalls, and each sidewall is connected to at least one of the connectors.

4. The fake battery cell according to claim 1, characterized in that, The connecting part is designed as a hollow structure.

5. The fake battery cell according to claim 1, characterized in that, The dummy battery cell body, the connecting part, and the connector are integrally formed by extrusion molding.

6. The fake battery cell according to claim 1, characterized in that, The end cap is detachably connected to the dummy battery cell body.

7. The fake battery cell according to claim 6, characterized in that, The end cap includes an end cap body and a first engaging portion. The first engaging portion is disposed on the periphery of the end cap body and can engage with the dummy battery cell body.

8. The dummy battery cell according to claim 7, characterized in that, The end cap body is designed as a rectangular structure, and multiple first engaging parts are provided, with the multiple first engaging parts respectively located at the four corners of the end cap body.

9. The dummy battery cell according to claim 8, characterized in that, The end cap further includes a second engaging portion, which is disposed in the middle of the end cap body and can engage with the connecting portion.

10. A power battery, characterized in that, It includes a housing, a battery cell, and a dummy battery cell. The housing has a mounting cavity, and the battery cell and the dummy battery cell are respectively installed in the mounting cavity.

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