Battery end plate and blade battery

Abstract

The utility model relates to battery technical field especially relates to a kind of battery end plate and blade battery.Battery end plate, comprising: end plate body and reinforcing plate;The end plate body is formed with the accommodating slot for accommodating tab along first direction;The two sides of the reinforcing plate are respectively connected with the two side walls of the accommodating slot along second direction opposite, and the accommodating slot is separated into multiple sub-accommodating slots for accommodating sub-tab.The battery end plate and blade battery provided by the utility model, by setting reinforcing plate, the structural strength of end plate body can be strengthened using reinforcing plate, prevent end plate body from appearing concave flatness defect when using, improve the assembly yield of tab.Meanwhile, since reinforcing plate separates accommodating slot into multiple sub-accommodating slots for accommodating sub-tab, the heat dissipation efficiency of tab can be improved, and then the stability and safety factor when battery works are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery end plate and a blade battery. Background Technology

[0002] With the continuous development of lithium-ion battery technology, lithium-ion batteries have been widely used in electric vehicles and energy storage, thus placing increasingly higher demands on their performance and safety. In existing blade cell designs, the positive terminal plate is located between the positive terminal cover and the electrode assembly. After the tabs are inserted into the end plate, the cover plate and the end plate are joined and pressed together, thereby fixing the position of the electrode assembly. In addition, the positive terminal plate also serves to accommodate the tabs, ensuring internal insulation.

[0003] However, see Figure 6 As shown, due to the wide tabs of the battery cell, the positive terminal plate needs to pass through a large tab size. However, the end plate is usually made using injection molding, and the material is often a material that is easily deformed (such as PP). In this case, the baffle on one side of the end plate is prone to defects such as concavity and poor flatness, which makes it difficult to assemble the tabs and further affects the battery assembly yield. Utility Model Content

[0004] This utility model provides a battery end plate and a blade battery to solve the problem that in existing blade batteries, the baffle on the positive terminal plate side is prone to defects such as indentation and poor flatness, which affect the assembly of the electrode tabs.

[0005] This utility model provides a battery end plate, including: an end plate body and a reinforcing plate.

[0006] The end plate body has a receiving groove for accommodating the electrode tab along the first direction; the two sides of the reinforcing plate are respectively connected to two side walls opposite to the receiving groove along the second direction, and the receiving groove is divided into a plurality of sub-receiving grooves for accommodating the sub-electrode tabs.

[0007] The battery end plate provided by this utility model includes a plurality of reinforcing plates, which are spaced apart along the first direction.

[0008] According to the battery end plate provided by this utility model, at least a portion of the reinforcing plate is perpendicularly connected to two side walls of the receiving groove that are opposite each other along the second direction.

[0009] According to the battery end plate provided by this utility model, at least some of the sub-accommodating slots have the same length along the first direction.

[0010] The battery end plate provided by this utility model also includes a tab support plate. The two sides of the tab support plate are respectively connected to the two side walls of the receiving groove along the first direction. The tab support plate is used to support the end of the tab.

[0011] According to the battery end plate provided by this utility model, the reinforcing plate is connected to the tab support plate.

[0012] According to the battery end plate provided by this utility model, the top surface of the reinforcing plate is flush with the top surface of the end plate body.

[0013] According to the battery end plate provided by this utility model, the thickness of the reinforcing plate gradually decreases along the direction from the bottom to the top of the end plate body.

[0014] According to the battery end plate provided by this utility model, the bottom of the receiving groove is provided with a clearance groove along the first direction, and the clearance groove is used to make way for the electrode tab.

[0015] Another aspect of this utility model provides a blade battery, comprising: a cover plate, a battery end plate as described in any of the preceding claims, and an electrode assembly.

[0016] The cover plate is provided with an electrode post, the electrode group includes an electrode tab, the electrode tab is connected to the electrode post, the electrode tab includes multiple sub-electrodes, and the sub-electrodes are located one-to-one in the sub-accommodating groove.

[0017] The battery end plate and blade battery provided by this utility model, by setting a reinforcing plate, can enhance the structural strength of the end plate body, prevent defects such as poor flatness of the end plate body during use, and improve the assembly yield of the tabs. At the same time, since the reinforcing plate divides the receiving groove into multiple sub-receiving grooves for accommodating the sub-tabs, it can improve the heat dissipation efficiency of the tabs, thereby improving the stability and safety factor of the battery during operation.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is one of the schematic diagrams of the battery end plate provided in this embodiment of the utility model.

[0021] Figure 2 This is the second schematic diagram of the battery end plate provided in this embodiment of the utility model.

[0022] Figure 3This is the third schematic diagram of the battery end plate provided in this embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of the blade battery provided in an embodiment of the present invention.

[0024] Figure 5 This is a cross-sectional view of the positive electrode side of the blade battery provided in this embodiment of the utility model.

[0025] Figure 6 This is a schematic diagram of the positive terminal plate in an existing blade battery.

[0026] Figure label:

[0027] 100. Battery end plate; 110. End plate body; 111. Receiving groove; 112. Relief groove; 120. Reinforcing plate; 130. Electrode support plate; 200. Cover plate; 210. Electrode post; 300. Electrode assembly; 310. Electrode tab. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to 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 the embodiments of this utility model according to the specific circumstances.

[0031] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined with Figures 1 to 6 This invention describes the battery end plate and blade battery provided by this utility model.

[0034] See Figure 1 and Figure 2 As shown, the battery end plate 100 provided in this embodiment of the present invention includes: an end plate body 110 and a reinforcing plate 120.

[0035] The end plate body 110 has a receiving groove 111 for accommodating the electrode tab 310 along the first direction; the two sides of the reinforcing plate 120 are respectively connected to the two side walls of the receiving groove 111 opposite to each other along the second direction, and divide the receiving groove 111 into a plurality of sub-receiving grooves for accommodating the sub-electrode tabs.

[0036] It should be noted that the "first direction" and "second direction" referred to in the embodiments of this utility model can both be understood as... Figure 1 The arrows shown in the diagram indicate the direction of travel. The first direction can be understood as the length direction of the end plate body 110 or the length direction of the tab 310, and the second direction can be understood as the width direction of the end plate body 110.

[0037] The battery end plate 100 and blade battery provided by this utility model, by setting a reinforcing plate 120, can enhance the structural strength of the end plate body 110, prevent defects such as poor concave flatness of the end plate body 110 during use, and improve the assembly yield of the tabs 310. At the same time, since the reinforcing plate 120 divides the receiving groove 111 into multiple sub-receiving grooves for accommodating the sub-tabs, it can improve the heat dissipation efficiency of the tabs 310, thereby improving the stability and safety factor of the battery during operation.

[0038] Specifically, the battery end plate 100 includes an end plate body 110 and a reinforcing plate 120. The end plate body 110 accommodates the battery tabs 310 and provides fixation and support. The end plate body 110 has a receiving groove 111 along a first direction to accommodate and fix the position of the tabs 310, ensuring correct connection and stable operation of the battery tabs 310. The reinforcing plate 120 enhances the structural strength of the end plate body 110, preventing deformation or damage during use. The two sides of the reinforcing plate 120 are respectively connected to two opposite sidewalls of the receiving groove 111 along a second direction, providing support to the sidewalls of the receiving groove 111 and ensuring its shape stability under stress. In addition, the reinforcing plate 120 divides the receiving slot 111 into multiple sub-receiving slots. Correspondingly, the battery tabs 310 are also configured as multiple sub-tabs. The sub-tabs are located in the corresponding sub-receiving slots, and adjacent sub-tabs are separated by the reinforcing plate 120. While ensuring the electrical performance of the battery, the spacing between the sub-tabs can also be used to optimize the overall heat dissipation efficiency of the tabs 310, thereby improving the stability and safety factor of the battery during operation.

[0039] The reinforcing plate 120 can be connected to the two side walls of the receiving groove 111 in various ways along the second direction. For example, a common method is to integrally mold the reinforcing plate 120 with the end plate body 110, so that the reinforcing plate 120 structure can be formed during injection molding; alternatively, the reinforcing plate 120 can be used as an independent component, and the reinforcing plate 120 can be connected to the side wall of the end plate body 110 by bolts, clips or other fixing methods, without any special limitation.

[0040] The number of reinforcing plates 120 is limited to at least one, that is, there can be one or more. For example, when the length of the end plate body 110 along the first direction is short, only a single reinforcing plate 120 can be provided to strengthen the structural strength of the end plate body 110; conversely, when the length of the end plate body 110 along the first direction is long, multiple reinforcing plates 120 can be provided to support different positions of the side wall of the receiving groove 111, thereby optimizing the support performance. In this case, the electrode tab 310 also includes a corresponding number of multiple sub-electrodes.

[0041] According to some embodiments of the present invention, the battery end plate 100 includes a plurality of reinforcing plates 120, which are spaced apart along a first direction.

[0042] By setting multiple reinforcing plates 120, the structural strength of the end plate body 110 can be enhanced more effectively, and the support performance of the end plate body 110 can be optimized.

[0043] Specifically, multiple reinforcing plates 120 are spaced apart along the first direction of the end plate body 110, and each reinforcing plate 120 is connected to the side wall of the end plate body 110, thereby providing support in different areas, distributing the force evenly, and reducing the risk of deformation of the end plate body 110. Especially for a longer end plate body 110, multiple reinforcing plates 120 can provide stable support at different positions.

[0044] It should be noted that when the battery end plate 100 is provided with multiple reinforcing plates 120, the multiple reinforcing plates 120 can be arranged in a uniform or non-uniform manner according to actual needs (such as spatial layout, component interference, etc.). For example, when the multiple reinforcing plates 120 are arranged in a uniform manner, the spacing between adjacent reinforcing plates 120 is equal, and the angle between each reinforcing plate 120 and the side wall of the receiving groove 111 is consistent (e.g., all are vertically connected); when the multiple reinforcing plates 120 are arranged in a non-uniform manner, there are three situations: first, the spacing between adjacent reinforcing plates 120 is equal, but the angle between at least some reinforcing plates 120 and the side wall of the receiving groove 111 is different; second, the spacing between at least some adjacent reinforcing plates 120 is different, but the angle between all reinforcing plates 120 and the side wall of the receiving groove 111 is consistent; third, the spacing between at least some adjacent reinforcing plates 120 is different, and the angle between at least some reinforcing plates 120 and the side wall of the receiving groove 111 is different.

[0045] According to some embodiments of the present invention, at least a portion of the reinforcing plate 120 is perpendicularly connected to the two side walls of the receiving groove 111 that are opposite each other along the second direction.

[0046] By vertically connecting at least a considerable reinforcing plate 120 to the two sidewalls of the receiving groove 111 opposite each other in the second direction, the structural strength and stability of the end plate body 110 can be significantly improved.

[0047] Specifically, the vertical connection reinforcement plate 120 can effectively enhance the end plate's resistance to pressure and deformation. Especially during battery operation, when the end plate is subjected to external force or internal pressure, the vertical connection design can better bear the force and prevent the end plate from being excessively deformed or damaged.

[0048] According to some embodiments of the present invention, at least some of the sub-receiving grooves have the same length along the first direction.

[0049] By setting at least some of the sub-receiving grooves to have the same length along the first direction, that is, by indicating that the spacing between at least some adjacent reinforcing plates 120 is the same, the structural uniformity and stability of the end plate body 110 can be achieved. The same spacing design can ensure that the end plate can evenly distribute the load when under stress, avoid local excessive pressure, and thus reduce the risk of end plate deformation or damage.

[0050] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the battery end plate 100 further includes a tab support plate 130. The two sides of the tab support plate 130 are respectively connected to the two side walls of the receiving groove 111 along the first direction. The tab support plate 130 is used to support the end of the tab 310.

[0051] By providing a tab support plate 130 in the battery end plate 100, and connecting the two sides of the tab support plate 130 to the two side walls of the receiving groove 111 along the first direction, the end of the tab 310 can be supported and fixed by the tab support plate 130, ensuring the stability of the end of the tab 310 during use.

[0052] Specifically, the tab support plate 130 can also be connected to the two side walls of the receiving groove 111 along the first direction in various ways. For example, the tab support plate 130 can be integrally formed with the end plate body 110, and the tab support plate 130 structure can be formed during injection molding; or the tab support plate 130 can be used as an independent component, and the tab support plate 130 can be connected to the side wall of the end plate body 110 by bolts, buckles or other fixing methods. There are no special limitations on this.

[0053] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the reinforcing plate 120 is connected to the tab support plate 130.

[0054] By connecting the reinforcing plate 120 to the tab support plate 130, the reinforcing plate 120 of the tab 310 can be fixed by the reinforcing plate 120, preventing the tab support plate 130 from deforming during use, thereby improving the overall structural strength and stability of the battery end plate 100.

[0055] As an example, in this embodiment, there is one reinforcing plate 120, and the end plate body 110, the reinforcing plate 120 and the tab support plate 130 are integrally set, which can improve the structural strength and compactness of the battery end plate 100, and can be manufactured by injection molding in one step, which simplifies the manufacturing process.

[0056] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the top surface of the reinforcing plate 120 is flush with the top surface of the end plate body 110.

[0057] By setting the top surface of the reinforcing plate 120 to be flush with the top surface of the end plate body 110, the structural strength of the end plate body 110 can be guaranteed, and interference between the reinforcing plate 120 and other components can be avoided during the assembly of the battery end plate 100.

[0058] According to some embodiments of the present invention, the thickness of the reinforcing plate 120 gradually decreases along the direction from the bottom to the top of the end plate body 110.

[0059] By setting the thickness of the reinforcing plate 120 to gradually decrease along the direction from the bottom to the top of the end plate body 110, the structural strength of the battery end plate 100 can be further improved. Moreover, compared with the reinforcing plate 120 of the same thickness along the direction from the bottom to the top of the end plate body 110, it has a lower mass, which is beneficial to achieving the lightweighting of the battery end plate 100.

[0060] See Figures 1 to 3 As shown, according to some embodiments of the present invention, the bottom of the receiving groove 111 is provided with a relief groove 112 along the first direction, and the relief groove 112 is used to make way for the tab 310.

[0061] By providing a clearance groove 112 at the bottom of the receiving groove 111 along the first direction, the clearance groove 112 can be used to allow clearance for the tab 310, making the assembly of the battery end plate 100 and the electrode assembly 300 simpler. When assembling the battery end plate 100 and the electrode assembly 300, the clearance groove 112 can be used to allow the end of the tab 310 to pass through, so that the tab 310 enters the receiving groove 111, and the end of the tab 310 is supported and fixed by the tab support plate 130.

[0062] The blade battery provided by this utility model is described below. The blade battery described below can be referred to in correspondence with the battery end plate 100 described above.

[0063] See Figure 4 and Figure 5 As shown, the blade battery provided in this embodiment of the present invention includes: a cover plate 200, a battery end plate 100 as described in any of the above embodiments, and an electrode assembly 300.

[0064] The cover plate 200 is provided with a pole post 210, and the pole group 300 includes a pole tab 310. The pole tab 310 is connected to the pole post 210. The pole tab 310 includes multiple sub-pole tabs, and the sub-pole tabs are located in the sub-accommodating grooves one by one.

[0065] The blade battery provided by this utility model, due to the use of the battery end plate 100 as described in any of the previous embodiments, can also utilize the reinforcing plate 120 to enhance the structural strength of the end plate body 110, preventing defects such as poor concave flatness of the end plate body 110 during use, and improving the assembly yield of the tabs 310. Simultaneously, since the reinforcing plate 120 divides the receiving groove 111 into multiple sub-receiving grooves for accommodating the sub-tabs, it can improve the heat dissipation efficiency of the tabs 310, thereby improving the stability and safety factor of the battery during operation.

[0066] It should be noted that the aforementioned battery end plate 100 can be installed on the positive side of the blade battery as a positive terminal plate, and of course, it can also be installed on the negative side of the blade battery as a negative terminal plate; there is no special limitation in this regard. Both the positive and negative sides of the blade battery are provided with cover plates 200; the one located on the positive side is the positive terminal cover plate, and the one located on the negative side is the negative terminal cover plate.

[0067] As an example, in this embodiment, the battery end plate 100 is provided only on the positive side of the blade battery.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery end plate, characterized in that, include: An end plate body, wherein the end plate body is formed with a receiving groove for accommodating the electrode tab along a first direction; A reinforcing plate, the two sides of which are respectively connected to two side walls of the receiving groove opposite each other along the second direction, and divide the receiving groove into a plurality of sub-receiving grooves for accommodating the sub-electrode tabs.

2. The battery end plate according to claim 1, characterized in that, It includes a plurality of the reinforcing plates, which are spaced apart along the first direction.

3. The battery end plate according to claim 2, characterized in that, At least a portion of the reinforcing plate is perpendicularly connected to the two sidewalls of the receiving groove that are opposite each other along the second direction.

4. The battery end plate according to claim 2, characterized in that, At least some of the sub-receiving slots have the same length along the first direction.

5. The battery end plate according to claim 1, characterized in that, It also includes a tab support plate, the two sides of which are respectively connected to the two side walls of the receiving groove along the first direction, and the tab support plate is used to support the end of the tab.

6. The battery end plate according to claim 5, characterized in that, The reinforcing plate is connected to the electrode support plate.

7. The battery end plate according to any one of claims 1 to 6, characterized in that, The top surface of the reinforcing plate is flush with the top surface of the end plate body.

8. The battery end plate according to any one of claims 1 to 6, characterized in that, The thickness of the reinforcing plate gradually decreases from the bottom to the top of the end plate body.

9. The battery end plate according to any one of claims 1 to 6, characterized in that, The bottom of the receiving groove is provided with a clearance groove along the first direction, and the clearance groove is used to make way for the electrode tab.

10. A blade battery, characterized in that, include: Cover plate, wherein the cover plate is provided with pole post; The battery end plate as described in any one of claims 1 to 9; The electrode assembly includes an electrode tab connected to the electrode post. The electrode tab includes multiple sub-electrodes, each sub-electrodes being located one-to-one within the sub-accommodating groove.

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