Battery cell end structure and power utilization device

Abstract

The utility model discloses a battery cell end structure and a power utilization device, the battery cell end structure comprises: a housing, in which an accommodating cavity is formed; the cross beam is fixedly arranged in the containing cavity and extends in the first direction; the battery cell is fixedly connected with the cross beam and located on one side of the cross beam in the second direction, and an anti-explosion valve is arranged on the battery cell; the end plate is arranged in the accommodating cavity, is connected with the cross beam and is positioned between the battery cell and the cross beam in the second direction; the limiting piece is arranged in the accommodating cavity and is connected with the cross beam and the shell; wherein the first direction is perpendicular to the second direction. According to the technical scheme provided by the utility model, the technical problem that in the prior art, under some conditions, the explosion-proof valve has the cracking risk under the normal charging and discharging or abnormal driving vibration working conditions of the battery cells at the end part and the middle part can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell end structure and an electrical device. Background Technology

[0002] With increasing focus on safety and energy efficiency, battery pack safety has become increasingly important. Furthermore, as battery pack energy density continues to improve, highly integrated battery pack structures are becoming increasingly crucial. Currently, most battery packs use aluminum profiles and side-mounted explosion-proof valves. In some cases, the explosion-proof valves of the end and middle cells may crack under normal charging and discharging conditions or abnormal driving vibrations. Utility Model Content

[0003] This utility model provides a battery cell end structure and an electrical device, which aims to effectively solve the technical problem that the explosion-proof valves of the end and middle battery cells have the risk of cracking under normal charging and discharging or abnormal driving vibration conditions in some situations in the prior art.

[0004] According to a first aspect of the present invention, the present invention provides a battery cell end structure, comprising: a housing having a receiving cavity formed therein; a crossbeam fixedly disposed within the receiving cavity and extending along a first direction; a battery cell fixedly connected to the crossbeam and located on one side of the crossbeam in a second direction; an end plate disposed within the receiving cavity and connected to the crossbeam, and located between the battery cell and the crossbeam in the second direction; and a limiting member disposed within the receiving cavity and connecting the crossbeam and the housing; wherein the first direction and the second direction are perpendicular to each other.

[0005] Furthermore, the limiting component includes a limiting block, which connects the battery cell, the end plate, the crossbeam, and the housing.

[0006] Furthermore, the crossbeam includes a front crossbeam and a rear crossbeam, the battery cell is fixedly connected to the rear crossbeam, the end plate is fixedly connected to the rear crossbeam, and the front crossbeam and the rear crossbeam are fixedly connected by the limiting member.

[0007] Furthermore, the limiting member includes a longitudinal beam, which is disposed between the front crossbeam and the rear crossbeam, and the front crossbeam and the rear crossbeam are fixedly connected by the longitudinal beam.

[0008] Furthermore, the longitudinal beam and the explosion-proof valve are located on the same straight line in the second direction.

[0009] Furthermore, the number of longitudinal beams is one or more, and when the number of longitudinal beams is one or more, two adjacent longitudinal beams are integrally formed.

[0010] Furthermore, when there is more than one longitudinal beam, the shape of two adjacent longitudinal beams integrally formed is U-shaped.

[0011] Furthermore, the limiting member includes a support plate, which is disposed at the bottom of the front crossbeam and the rear crossbeam near the housing, and the support plate is fixedly assembled with the front crossbeam and the rear crossbeam.

[0012] Furthermore, the explosion-proof valve is located on the side of the battery cell facing the bottom of the housing, and the end face of the support plate near the bottom of the housing, the end face of the explosion-proof valve facing away from the battery cell, the side face of the front crossbeam near the housing, and the end face of the rear crossbeam near the bottom of the housing are all located on the same plane.

[0013] According to a second aspect of the present invention, the present invention also provides an electrical device comprising the battery cell end structure described in any of the preceding claims.

[0014] Through one or more embodiments of the above-described embodiments of this utility model, at least the following technical effects can be achieved:

[0015] In the technical solution disclosed in this utility model, by using a limiting member to connect the crossbeam and the housing, under certain circumstances, the strain force generated by the deformation or enlargement of the end and middle battery cells can be transmitted to the crossbeam under normal charging and discharging or abnormal driving vibration conditions, so that the crossbeam can share part of the strain force, and the limiting member can also share part of the strain force, thereby reducing the strain force on the explosion-proof valve on the battery cell and reducing the risk of cracking of the explosion-proof valve. Attached Figure Description

[0016] The technical solution and other beneficial effects of this utility model will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0017] Figure 1 An exploded view of the assembly schematic diagram of the end battery structure arrangement assembly provided in the embodiment of this utility model;

[0018] Figure 2 An exploded view of the end structure of the battery cell provided in Embodiment 2 of this utility model;

[0019] Figure 3 An exploded view of the end structure of the battery cell provided in Embodiment 3 of this utility model;

[0020] Figure 4 An exploded view of the end structure of the battery cell provided in an embodiment of this utility model.

[0021] Figure label:

[0022] 1. Housing; 2. Crossbeam; 3. Battery cell; 4. End plate; 5. Limiting component; 11. Receiving cavity; 31. Explosion-proof valve; 51. Limiting block; 52. Longitudinal beam; 53. Support plate; 21. Front crossbeam; 22. Rear crossbeam. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0025] With the rapid development and iteration of the automotive industry, the cost of battery packs has become particularly prominent. Furthermore, electric vehicles encounter various complex operating conditions during operation. To enhance the battery pack's ability to cope with these conditions, its structural strength must be improved, and the design of the battery pack structure directly affects its overall safety performance. With increasing focus on safety and energy efficiency, battery pack safety performance has become increasingly important. With the development of new processes and technologies, battery pack structures have become more diverse. Moreover, with the continuous improvement of battery pack energy density, highly integrated battery pack structures are becoming increasingly crucial.

[0026] Most current battery packs use aluminum profiles and explosion-proof valves on the side. In extreme cases, the explosion-proof valves on the side can cause arcing, which can seriously affect the safety of the electrical components and battery cells inside the pack.

[0027] With increasing focus on safety and energy efficiency, battery pack safety has become increasingly important. Furthermore, as battery pack energy density continues to improve, highly integrated battery pack structures are becoming increasingly crucial. Currently, most battery packs use aluminum profiles and side-mounted explosion-proof valves. In some cases, the explosion-proof valves of the end and middle cells may crack under normal charging and discharging conditions or abnormal driving vibrations.

[0028] Therefore, this application provides a battery cell end structure and an electrical device that can reduce the risk of explosion-proof valve cracking in the end and middle battery cells under normal charging and discharging or abnormal driving vibration conditions in some cases.

[0029] Example 1

[0030] Figure 1 The image shown is an exploded view of the assembly schematic diagram of the end battery structure layout.

[0031] like Figure 1 As shown, the battery cell end structure provided in this embodiment includes: a housing 1, a crossbeam 2, a battery cell 3, an end plate 4, and a limiting member 5; wherein, a receiving cavity 11 is formed inside the housing 1; the crossbeam 2 is fixedly disposed in the receiving cavity 11 and extends along a first direction; the battery cell 3 is fixedly connected to the crossbeam 2 and is located on one side of the crossbeam 2 in a second direction; the end plate 4 is disposed in the receiving cavity 11 and connected to the crossbeam 2, and is located between the battery cell 3 and the crossbeam 2 in the second direction; the limiting member 5 is disposed in the receiving cavity 11 and connects the crossbeam 2 and the housing 1; and the first direction and the second direction are perpendicular to each other.

[0032] Exemplarily, this embodiment in Figure 1 The text represents one implementation of the first and second directions, where OA or OA1 is the second direction and OB or OB1 is the first direction. In other embodiments, other first and second directions can also be set according to actual needs.

[0033] In this embodiment, an explosion-proof valve 31 is provided on the battery cell 3, and the explosion-proof valve 31 is located at the bottom of the battery cell 3 near the housing 1.

[0034] Therefore, the cell end structure provided in this embodiment, by using the limiting member 5 to connect the crossbeam 2 and the housing 1, can, under certain circumstances, allow the strain force generated by the deformation or enlargement of the end and middle cell 3 to be transmitted to the crossbeam 2 under normal charging and discharging or abnormal driving vibration conditions, so that the crossbeam 2 can share part of the strain force, and the limiting member 5 can also share part of the strain force, thereby reducing the strain force on the explosion-proof valve 31 on the cell 3 and reducing the risk of cracking of the explosion-proof valve 31.

[0035] Example 2

[0036] like Figure 1 and Figure 2 As shown, the battery cell end structure provided in this embodiment includes: a housing 1, a crossbeam 2, a battery cell 3, an end plate 4, and a limiting member 5; wherein, a receiving cavity 11 is formed inside the housing 1; the crossbeam 2 is fixedly disposed in the receiving cavity 11 and extends along a first direction; the battery cell 3 is fixedly connected to the crossbeam 2 and is located on one side of the crossbeam 2 in a second direction; the end plate 4 is disposed in the receiving cavity 11 and connected to the crossbeam 2, and is located between the battery cell 3 and the crossbeam 2 in the second direction; the limiting member 5 is disposed in the receiving cavity 11 and connects the crossbeam 2 and the housing 1; and the first direction and the second direction are perpendicular to each other.

[0037] In this embodiment, the limiting member 5 includes a limiting block 51, which connects the battery cell 3, the end plate 4, the crossbeam 2, and the housing 1.

[0038] The stiffness of the end cell 3 is relatively weak, mainly because the end structure consists of the front crossbeam 21, crossbeam 2, end plate 4, and cell 3. During the entire battery charge-discharge cycle, the end cell 3 deforms significantly, especially the large surface deformation, which causes large deformation at the explosion-proof valve 31, leading to a risk of cracking and leakage. Therefore, the end cell structure provided in this embodiment uses the limiting member 5 to connect the cell 3, end plate 4, and crossbeam 2 as a whole, making full use of the stiffness of the crossbeam 2, thereby reducing the deformation stress at the bottom explosion-proof valve 31 of the cell 3 and improving the safety of the entire explosion-proof valve 31.

[0039] In some embodiments, the limiting block 51 is square. In other embodiments, the limiting block 51 can also be stepped. It should be noted that the limiting block 51 in this embodiment serves to connect the battery cell 3, the end plate 4, and the crossbeam 2. The square and stepped shapes illustrated in this embodiment are just two shapes of the limiting block 51, mainly to achieve the function of connecting the battery cell 3, the end plate 4, and the crossbeam 2. The limiting block 51 can also be other shapes.

[0040] In some embodiments, the material of the limiting block 51 can be an adhesive fixing body after the battery cell 3, end plate 4 and crossbeam 2 are glued together, or a rigid MPP, composite material, etc.

[0041] Example 3

[0042] like Figure 1 and Figure 3 As shown, the battery cell end structure provided in this embodiment includes: a housing 1, a crossbeam 2, a battery cell 3, an end plate 4, and a limiting member 5; wherein, a receiving cavity 11 is formed inside the housing 1; the crossbeam 2 is fixedly disposed in the receiving cavity 11 and extends along a first direction; the battery cell 3 is fixedly connected to the crossbeam 2 and is located on one side of the crossbeam 2 in a second direction; the end plate 4 is disposed in the receiving cavity 11 and connected to the crossbeam 2, and is located between the battery cell 3 and the crossbeam 2 in the second direction; the limiting member 5 is disposed in the receiving cavity 11 and connects the crossbeam 2 and the housing 1; and the first direction and the second direction are perpendicular to each other.

[0043] Among them, the crossbeam 2 includes a front crossbeam 21 and a rear crossbeam 22, the battery cell 3 is fixedly connected to the rear crossbeam 22, the end plate 4 is fixedly connected to the rear crossbeam 22, and the front crossbeam 21 and the rear crossbeam 22 are fixedly connected by a limiting member 5.

[0044] In this embodiment, by dividing the crossbeam 2 into a front crossbeam 21 and a rear crossbeam 22, the amount of medium through which the strain force generated by the deformation of the battery cell 3 is transmitted can be increased. By distributing the strain force layer by layer, the strain force borne by the explosion-proof valve 31 can be further reduced.

[0045] In this embodiment, the limiting member 5 includes a longitudinal beam 52, which is disposed between the front crossbeam 21 and the rear crossbeam 22 and is fixedly connected to the front crossbeam 21 and the rear crossbeam 22.

[0046] In this embodiment, an explosion-proof valve 31 is provided on the battery cell 3, and the explosion-proof valve 31 is located at the bottom of the battery cell 3 near the housing 1.

[0047] In this embodiment, the strain force generated when the battery cell 3 expands and deforms is transmitted from the rear crossbeam 22 to the front crossbeam 21 via the longitudinal beam 52, so that the front crossbeam 21, the longitudinal beam 52, and the rear crossbeam 22 can all share part of the strain force, thereby reducing the strain force borne by the explosion-proof valve 31, thus reducing the deformation stress at the bottom explosion-proof valve 31 of the battery cell 3, and improving the safety of the entire explosion-proof valve 31.

[0048] In some embodiments, the explosion-proof valve 31 and the longitudinal and transverse beams 2 are located on the same straight line in the second direction.

[0049] In this embodiment, by setting the explosion-proof valve 31 and the longitudinal beam 52 on the same straight line, when the battery cell 3 expands and deforms, the transmission path of the strain force from the front crossbeam 21 to the rear crossbeam 22 is shorter. Therefore, the deformation of the bottom of the battery cell 3 where the explosion-proof valve 31 is set can be further reduced, thereby reducing the deformation of the explosion-proof valve 31 and improving the safety of the explosion-proof valve 31.

[0050] In some embodiments, the structural form and number of longitudinal beams 52 can be designed according to the number of explosion-proof valves 31. For example, the number of longitudinal beams 52 is one or more, and when the number of longitudinal beams 52 is one or more, two adjacent longitudinal beams 52 are integrally formed.

[0051] In this embodiment, the more longitudinal beams 52 there are, the more the strain force generated by the deformation of the battery cell 3 can be distributed. The fewer the battery cells 3 there are, the lower the manufacturing cost and weight of the battery can be. The specific number can be set according to different situations. This application takes two longitudinal beams 52 as an example for explanation. The two longitudinal beams 52 are integrally formed, which can increase the stability of the longitudinal beams 52, thereby improving the stability between the front crossbeam 21, the longitudinal beams 52 and the rear crossbeam 22. This, in turn, increases the strain force that the crossbeams 2, the longitudinal beams 52 and the rear crossbeam 22 can distribute, and reduces the strain force distributed by the explosion-proof valve 31. Therefore, the safety of the explosion-proof valve 31 can be improved.

[0052] In some embodiments, when there is more than one longitudinal beam 52, the shape of two adjacent longitudinal beams 52 integrally formed is U-shaped.

[0053] In this embodiment, there are two longitudinal beams 52, which are integrally formed and U-shaped. This shape can further improve the stability of the longitudinal beams 52, thereby increasing the strain force that the longitudinal beams 52 can distribute, and thus further improving the safety of the explosion-proof valve 31.

[0054] Example 4

[0055] like Figure 1 and Figure 4 As shown, the battery cell end structure provided in this embodiment includes: a housing 1, a crossbeam 2, a battery cell 3, an end plate 4, and a limiting member 5; wherein, a receiving cavity 11 is formed inside the housing 1; the crossbeam 2 is fixedly disposed in the receiving cavity 11 and extends along a first direction; the battery cell 3 is fixedly connected to the crossbeam 2 and is located on one side of the crossbeam 2 in a second direction; the end plate 4 is disposed in the receiving cavity 11 and connected to the crossbeam 2, and is located between the battery cell 3 and the crossbeam 2 in the second direction; the limiting member 5 is disposed in the receiving cavity 11 and connects the crossbeam 2 and the housing 1; and the first direction and the second direction are perpendicular to each other.

[0056] The crossbeam 2 includes a front crossbeam 21 and a rear crossbeam 22. The battery cell 3 is fixedly connected to the rear crossbeam 22, and the end plate 4 is fixedly connected to the rear crossbeam 22. The limiting member 5 includes a support plate 53, which is located at the bottom of the front crossbeam 21 and the rear crossbeam 22 near the housing 1, and the support plate 53 is fixedly assembled with the front crossbeam 21 and the rear crossbeam 22.

[0057] In this embodiment, an explosion-proof valve 31 is provided on the battery cell 3, and the explosion-proof valve 31 is located at the bottom of the battery cell 3 near the housing 1.

[0058] In this embodiment, the strain force generated when the battery cell 3 expands and deforms is transmitted from the rear crossbeam 22 to the front crossbeam 21 through the support plate 53, so that the front crossbeam 21, the support plate 53, and the rear crossbeam 22 can all share part of the strain force, thereby reducing the strain force borne by the explosion-proof valve 31, thereby reducing the deformation stress at the bottom explosion-proof valve 31 of the battery cell 3, and improving the safety of the entire explosion-proof valve 31.

[0059] In some embodiments, the explosion-proof valve 31 is located on the side of the battery cell 3 facing the bottom of the housing 1, and the end face of the support plate 53 near the bottom of the housing 1, the end face of the explosion-proof valve 31 facing away from the battery cell 3, the side face of the front crossbeam 21 near the housing 1, and the end face of the rear crossbeam 22 near the bottom of the housing 1 are all located on the same plane.

[0060] In this embodiment, by placing the explosion-proof valve 31, the front crossbeam 21 near the side of the housing 1, the rear crossbeam 22 near the side of the housing 1, and the support plate 53 on the same plane, the explosion-proof valve 31, the front crossbeam 21, the flat plate support, and the rear crossbeam 22 can form a common plane. When the battery cell 3 expands and deforms, part of the strain force on the plane where the explosion-proof valve 31 is located is transferred to the front crossbeam 21, the rear crossbeam 22, and the support plate 53 on the same plane, thereby improving the rigidity of the plane where the explosion-proof valve 31 is located. That is, when the battery cell 3 expands and deforms, the deformation of the explosion-proof valve 31 can be reduced, thus improving the safety of the explosion-proof valve 31.

[0061] In this embodiment, the support plate 53 is a flat plate. In other embodiments, the support plate 53 may have other shapes, such as a U-shaped plate. It should be noted that the support plate 53 may have various shapes. This embodiment only illustrates the cases of flat plates and U-shaped plates. In other embodiments, as long as the support plate 53 can connect the front crossbeam 21 and the rear crossbeam 22, or further locate the front crossbeam 21, the rear crossbeam 22, the support plate 53, and the explosion-proof valve 31 on the same plane, the shape of the support plate 53 is within the protection scope of the support plate 53 of this application.

[0062] This application also provides an electrical device, including the battery cell end structure provided in any of the above embodiments.

[0063] In summary, the cell end structure and electrical device provided in this application embodiment, through innovative design of the end cell structure, improve the stress on the explosion-proof valve during large cell deformation, further reducing the stress on the weak areas of the explosion-proof valve. Therefore, it can better protect the end and middle cells from the risk of explosion-proof valve cracking under normal charging and discharging or abnormal driving vibration conditions, improve the safety of the entire battery pack, and has significant economic benefits and value.

[0064] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A cell end structure, characterized in that, include: The shell has a cavity formed inside it; A crossbeam is fixedly disposed within the accommodating cavity and extends along the first direction; The battery cell is fixedly connected to the crossbeam and located on one side of the crossbeam in the second direction. An explosion-proof valve is provided on the battery cell. An end plate is disposed within the accommodating cavity and connected to the crossbeam, and is located between the battery cell and the crossbeam in the second direction; A limiting member is disposed within the receiving cavity and connects the crossbeam and the housing; Wherein, the first direction and the second direction are perpendicular to each other.

2. The cell end structure as described in claim 1, characterized in that, The limiting component includes a limiting block, which connects the battery cell, the end plate, the crossbeam, and the housing.

3. The cell end structure as described in claim 1, characterized in that, The crossbeam includes a front crossbeam and a rear crossbeam. The battery cell is fixedly connected to the rear crossbeam, and the end plate is fixedly connected to the rear crossbeam. The front crossbeam and the rear crossbeam are fixedly connected by the limiting member.

4. The cell end structure as described in claim 3, characterized in that, The limiting component includes a longitudinal beam, which is disposed between the front crossbeam and the rear crossbeam, and the front crossbeam and the rear crossbeam are fixedly connected by the longitudinal beam.

5. The cell end structure as described in claim 4, characterized in that, The longitudinal beam and the explosion-proof valve are located on the same straight line in the second direction.

6. The cell end structure as described in claim 4, characterized in that, The number of longitudinal beams is one or more, and when the number of longitudinal beams is one or more, two adjacent longitudinal beams are integrally formed.

7. The cell end structure as described in claim 6, characterized in that, When there is one or more longitudinal beams, the shape of two adjacent longitudinal beams integrally formed is U-shaped.

8. The cell end structure as described in claim 3, characterized in that, The limiting component includes a support plate, which is disposed at the bottom of the front crossbeam and the rear crossbeam near the housing, and the support plate is fixedly assembled with the front crossbeam and the rear crossbeam.

9. The cell end structure as described in claim 8, characterized in that, The explosion-proof valve is located on the side of the battery cell facing the bottom of the housing. The end face of the support plate near the bottom of the housing, the end face of the explosion-proof valve facing away from the battery cell, the side face of the front crossbeam near the housing, and the end face of the rear crossbeam near the bottom of the housing are all located on the same plane.

10. An electrical device, characterized in that, include: The cell end structure as described in any one of claims 1-9.

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