Fixing device, power battery and power battery system

Abstract

The utility model provides a fixing device, a power battery and a power battery system, the fixing device is suitable for the power battery, the power battery comprises a pole, the fixing device comprises an adapter sheet, the adapter sheet is provided with two oppositely arranged protruding parts, and the protruding parts are provided with grooves or positioning holes; the supporting plate is located below the adapter piece, and a buckle matched with the groove or a positioning column matched with the positioning hole is arranged on the supporting plate; wherein the adapter piece and the supporting plate are fixedly connected through a first fixing mode or a second fixing mode, the first fixing mode comprises that the grooves and the buckles are clamped and fixed, and the second fixing mode comprises that the positioning columns and the positioning holes are fixed through hot melting welding. According to the fixing device, the power battery and the power battery system provided by the invention, the adapter piece can be effectively fixed, and the battery performance is further improved.

Description

Technical Field

[0001] This application mainly relates to the technical field of batteries, and particularly relates to a fixing device, a power battery and a power battery system. Background Art

[0002] Lithium battery soft connection welding is a method of connecting battery electrode plates using a flexible conductive material. The principle is to use the pressure and current at high temperature to weld the flexible conductive material to the battery electrode plate. The soft connection welding process uses flexible conductive materials such as copper strips, aluminum strips, nickel strips, etc. These materials have good flexibility and electrical conductivity, can effectively relieve the internal stress of the battery, reduce the generation of hot spots, and can improve the safety and stability of the battery. Jumper welding is a traditional welding process. The connection between battery electrode plates usually uses hard conductive materials such as copper foil or aluminum foil. This connection method is prone to generating hot spots and causing an increase in the internal pressure of the battery.

[0003] The jumper and the soft connection are key components for connecting the battery cover plate and the battery cell. It must take into account the requirements of the battery for overcurrent, strength and low spatter at the same time. Therefore, during the welding process with the cover plate, a sufficient weld width is required, and it is necessary to ensure that no particles fall on the battery cell to avoid battery short - circuit. Copper, as the negative electrode material, belongs to a high - reflectivity material with a low absorption rate and requires a higher energy density for welding.

[0004] In the existing field, the welding position of the jumper is not fixed. Therefore, in the case of a large assembly position tolerance, the jumper is likely to contact the battery housing, resulting in the problem of battery short - circuit. And there is a certain height difference between the jumper and the pole column in the existing mechanism, resulting in insufficient internal utilization space of the battery and low integration. Summary of the Utility Model

[0005] The technical problem to be solved by this application is to provide a fixing device, a power battery and a power battery system, which can effectively fix the jumper and further improve the battery performance.

[0006] To solve the above - mentioned technical problem, this application provides a fixing device applicable to a power battery. The power battery includes a pole column. The fixing device includes: a jumper, on which there are two oppositely - arranged protruding parts, and there are grooves or positioning holes on the protruding parts; a support plate located below the jumper, and there are buckles on the support plate that cooperate with the grooves or positioning columns that cooperate with the positioning holes; wherein, the jumper and the support plate are fixedly connected by a first fixing method or a second fixing method. The first fixing method includes clamping and fixing the groove and the buckle, and the second fixing method includes thermally welding and fixing the positioning column and the positioning hole.

[0007] Optionally, the adapter plate further includes a square hole adapted to allow the pole column to pass through, and the inner wall of the square hole is adapted to closely fit with the outer surface of the pole column.

[0008] Optionally, the length of the square hole ranges from 50 mm to 80 mm, and the width of the square hole ranges from 50 mm to 80 mm.

[0009] Optionally, the length of the protrusion on the adapter plate ranges from 10 mm to 50 mm, and the width of the protrusion ranges from 10 mm to 20 mm.

[0010] Optionally, when the adapter plate is fixedly connected to the support plate by the second fixing method, the outer surface of the positioning post closely fits with the inner wall of the positioning hole.

[0011] Optionally, the diameter of the positioning hole on the adapter plate ranges from 5 mm to 8 mm, the diameter of the positioning post ranges from 5 mm to 8 mm, and the height of the positioning post ranges from 10 mm to 15 mm.

[0012] Optionally, the positioning post is made of PPS and is adapted to melt when the temperature exceeds 285 °C.

[0013] Optionally, the adapter plate includes a positive adapter plate and a negative adapter plate.

[0014] To solve the above technical problems, the present application provides a power battery, including the fixing device as described above, wherein the adapter plate in the fixing device includes a positive adapter plate and a negative adapter plate; and pole columns, including a positive pole column and a negative pole column, wherein the positive pole column is electrically connected to the positive adapter plate, and the negative pole column is electrically connected to the negative adapter plate.

[0015] To solve the above technical problems, the present application provides a power battery system, including one or more power batteries as described above.

[0016] Compared with the prior art, the present application proposes a fixing device, which adopts a first fixing method of snap-groove clamping and fixing connection between the adapter plate and the support plate and a second fixing method of hot-melt welding and fixing between the adapter plate and the support plate through the positioning hole and the positioning post, which can effectively fix the position of the adapter plate in the battery, accurately position the adapter plate, and make the relative position between the adapter plate and other components inside the battery more accurate, thus ensuring that the adapter plate will not contact the housing and cause a short-circuit problem. The fixing device of the present application further includes a square hole, which allows the battery pole column to pass through the adapter plate, eliminating the problem of insufficient utilization of the internal space of the battery caused by the height difference between the adapter plate and the pole column in the existing structure. Description of the Drawings

[0017] The accompanying drawings are provided to further understand the present application, and they are incorporated into and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and, together with this specification, serve to explain the principles of the present application. In the accompanying drawings:

[0018] Figure 1 is a front view of a fixing device in a power battery in an embodiment of the present application when the first fixing method is adopted;

[0019] Figure 2 is a side view of a fixing device in a power battery in an embodiment of the present application when the first fixing method is adopted;

[0020] Figure 3 is as Figure 2 a schematic structural view of part A of a fixing device in a power battery in the shown embodiment when the first fixing method is adopted;

[0021] Figure 4 is a front view of a fixing device in a power battery in an embodiment of the present application when the second fixing method is adopted;

[0022] Figure 5 is a side view of a fixing device in a power battery in an embodiment of the present application when the second fixing method is adopted;

[0023] Figure 6 is as Figure 5 a schematic structural view of part B of a fixing device in a power battery in the shown embodiment when the second fixing method is adopted;

[0024] Figure 7 is a front view of the structure of a square hole in a fixing device in a power battery in an embodiment of the present application;

[0025] Figure 8 is a side view of the structure of a square hole in a fixing device in a power battery in an embodiment of the present application;

[0026] Figure 9 is as Figure 8 a schematic structural view of part C of a fixing device in a power battery in the shown embodiment. Detailed implementation manners

[0027] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0028] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0029] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of this application. At the same time, it should be understood that, for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] In the description of this application, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this application and simplifying the description. Without contrary instructions, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of this application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0031] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure. For example, if the device in the attached drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0032] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of this description. In addition, it is required to understand this application not only through the actual terms used, but also through the meanings implied by each term.

[0033] This application refers to Figures 1 to 9 A power battery 100 is proposed. The power battery 100 includes a fixing device 10 and a pole 11. Specifically, the fixing device 10 includes a connecting piece 101 and a support plate 102. Among them, the connecting piece 101 includes a positive connecting piece 1011 and a negative connecting piece 1012. Whether it is the positive connecting piece 1011 or the negative connecting piece 1012, there are two oppositely arranged protrusions 103 thereon, and grooves 200 or positioning holes 300 are provided on the protrusions 103; the support plate 102 is located below the connecting piece 101, and a buckle 201 that cooperates with the groove 200 or a positioning post 301 that cooperates with the positioning hole 300 is provided on the support plate 102. The pole 11 includes a positive pole 12 and a negative pole 13. The positive pole 12 is electrically connected to the positive connecting piece 1011, and the negative pole 13 is electrically connected to the negative connecting piece 1012.

[0034] In this embodiment, the connecting piece 101 and the support plate 102 in the fixing device 10 can be fixedly connected in two different ways. Now refer to Figures 1 to 3 to detail the specific structure of the fixing connection between the connecting piece 101 and the support plate 102 in the fixing device 10 by the first fixing method.

[0035] Further, referring to Figures 1 to 3 , when the adapter piece 101 and the support plate 102 are fixedly connected by the first fixing method, at this time, only the groove 200 is provided on the protruding portion 103 of the adapter piece 101, and only the buckle 201 is provided on the support plate 102. The groove 200 and the buckle 201 correspond to each other in spatial position, and the buckle 201 can be engaged with the groove 200 to realize the fixation of the adapter piece 101 and the support plate 102. Exemplarily, multiple grooves 200 can be provided on the protruding portion 103, and the buckles 201 on the support plate 102 can also be provided in multiple according to the number of the grooves 200. The present application is not limited thereto.

[0036] On the other hand, referring to Figures 4 to 6 , the adapter piece 101 and the support plate 102 in the fixing device 10 can be connected by the second fixing method. When the adapter piece 101 and the support plate 102 are fixedly connected by the second fixing method, at this time, only the positioning hole 300 is provided on the protruding portion 103 of the adapter piece 101, and only the positioning post 301 is provided on the support plate 102. The positioning hole 300 and the positioning post 301 correspond to each other in spatial position. During fixation, the outer surface of the positioning post 301 is closely attached to and passes through the inner wall of the positioning hole 300, and then the positioning post 301 is heated and deformed and melted by means of hot melt welding, so as to realize the fixation of the adapter piece 101 and the support plate 102.

[0037] Exemplarily, the diameter range of the positioning hole 300 is 5 mm to 8 mm, the diameter range of the positioning post 301 is 5 mm to 8 mm, the height range is 10 mm to 15 mm, and the positioning post 301 can be made of PPS (Polyphenylene sulfide) material. When the temperature is higher than 285 °C, PPS is heated and deformed and melted. Further, multiple positioning holes 300 can be provided on the protruding portion 103, and the positioning posts 301 on the support plate 102 can also be provided in multiple according to the number of the positioning holes 300. The present application is not limited thereto.

[0038] Preferably in this embodiment, the length x1 of the protruding portion 103 ranges from 10 mm to 50 mm, and the width y1 ranges from 10 mm to 20 mm. When the first fixing method is adopted, the length x1 of the protruding portion 103 is preferably 50 mm, and the width y1 is preferably 20 mm. When the second fixing method is adopted, the length x2 of the protruding portion 103 is preferably 10 mm, and the width y2 is preferably 10 mm. In actual application scenarios, the length and width of the protruding portion 103 can be flexibly adjusted according to actual needs. The present application is not limited thereto.

[0039] In this embodiment, referring to Figures 7 to 9, a square hole 104 may also be provided on the adapter piece 101. The square hole 104 is adapted to allow the pole column 11 to pass through, and the inner wall of the square hole 104 is in close fit with the outer surface of the pole column 11. Through the design of the square hole 104, the pole column 11 can pass through the adapter piece 101, enabling the adapter piece 101 and the support plate 102 to be directly attached, further saving battery space. Exemplarily, the length range of the square hole 104 is 50 mm to 80 mm, and the width range is 50 mm to 80 mm.

[0040] On the other hand, the present application also provides a power battery system, including one or more power batteries provided in any embodiment of the present application, such as the above-mentioned power battery 100.

[0041] The present application adopts a first fixing method of snap-groove clamping and fixing connection between the adapter piece and the support plate, and a second fixing method of hot-melt welding and fixing between the adapter piece and the support plate through positioning holes and positioning posts, which can effectively fix the position of the adapter piece in the battery, accurately position the adapter piece, and make the relative position between the adapter piece and other components inside the battery more accurate, thereby ensuring that the adapter piece will not contact the housing and cause a short-circuit problem. The fixing device of the present application also includes a square hole, which enables the battery pole column to pass through the adapter piece, eliminating the problem of insufficient utilization of the internal space of the battery caused by the height difference between the adapter piece and the pole column in the existing structure.

[0042] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only an example and does not constitute a limitation to the present application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to the present application. Such modifications, improvements, and corrections are proposed in the present application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of the present application.

[0043] At the same time, the present application uses specific terms to describe the embodiments of the present application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present application can be appropriately combined.

[0044] Similarly, it should be noted that, in order to simplify the description disclosed in this application and thus help the understanding of one or more embodiments of the application, in the foregoing description of the embodiments of this application, multiple features are sometimes grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the single embodiment disclosed above.

[0045] In some embodiments, numbers are used to describe components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are modified by the modifiers "about", "approximate" or "substantially" in some examples. Unless otherwise specified, "about", "approximate" or "substantially" indicate that the said numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used in some embodiments of this application to confirm the breadth of their scope are approximate values, in specific embodiments, such numerical settings are as precise as possible within the feasible range.

[0046] Although this application has been described with reference to the current specific embodiments, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the spirit of this application, they will fall within the scope of the claims of this application.

Claims

1. A fixing device, applicable to a power battery, wherein the power battery comprises a pole, characterized in that: The fixing device comprises: An adapter plate, wherein the adapter plate has two protrusions arranged opposite to each other, and the protrusions are provided with grooves or positioning holes; A support plate, the support plate is located below the adapter plate, and a buckle matched with the groove or a positioning column matched with the positioning hole is provided on the support plate; The adapter plate and the support plate are fixedly connected by a first fixing method or a second fixing method, wherein the first fixing method includes fixing the groove and the buckle by snapping, and the second fixing method includes fixing the positioning column and the positioning hole by hot-melt welding.

2. The fixing device according to claim 1, characterized in that The adapter plate further comprises a square hole, the square hole is suitable for the pole to pass through, and the inner wall of the square hole is suitable for tightly fitting with the outer surface of the pole.

3. The fixing device according to claim 2, characterized in that: The length of the square hole ranges from 50 mm to 80 mm, and the width of the square hole ranges from 50 mm to 80 mm.

4. The fixing device according to claim 1, characterized in that: The length of the protrusion on the adapter sheet ranges from 10 mm to 50 mm, and the width of the protrusion ranges from 10 mm to 20 mm.

5. The fixing device according to claim 1, characterized in that: When the adapter plate is fixedly connected to the support plate by the second fixing method, the outer surface of the positioning column is tightly fitted with the inner wall of the positioning hole.

6. The fixing device according to claim 5, characterized in that: The diameter of the positioning hole on the adapter plate ranges from 5 mm to 8 mm, the diameter of the positioning column ranges from 5 mm to 8 mm, and the height of the positioning column ranges from 10 mm to 15 mm.

7. The fixing device according to claim 1, characterized in that: The material of the positioning post includes PPS, and the positioning post is suitable for being melted by heat when the temperature exceeds 285°C.

8. The fixing device according to claim 1, characterized in that: The adapter plate includes a positive electrode adapter plate and a negative electrode adapter plate.

9. A power battery, characterized in that: include The fixing device according to any one of claims 1 to 8, wherein the adapter in the fixing device comprises a positive adapter and a negative adapter; and The poles include a positive pole and a negative pole, wherein the positive pole is electrically connected to the positive electrode adapter, and the negative pole is electrically connected to the negative electrode adapter.

10. A power battery system, characterized in that: Comprising one or more power batteries as claimed in claim 9.

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