Battery box body with honeycomb structure

Abstract

The utility model relates to a battery box with a honeycomb structure. The honeycomb structure battery box body comprises a battery module, a jacking assembly and a limiting assembly, the battery module comprises a single battery, the bottom of the single battery is provided with an expansion groove, and the top of the single battery is provided with a first accommodating area and a second accommodating area; the jacking assembly comprises a first supporting block, a second supporting block and a third supporting block, the first supporting block is arranged in the expansion groove, the second supporting block is arranged in the first containing area, and the third supporting block is arranged in the second containing area; the limiting assembly comprises a first buffer plate and a second buffer plate, and the first buffer plate and the second buffer plate are located on the two sides of the single battery respectively. According to the scheme provided by the invention, uniform binding force can be applied to the single batteries in multiple directions, and slippage between the single batteries is prevented.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a honeycomb structure battery box. Background Technology

[0002] In related technologies, the individual cells within the lithium metal battery pack in a honeycomb structure battery case exhibit a "deep breathing" effect during charging and discharging. This "deep breathing" effect refers to the significant volume change of the individual cells during charging and discharging. This volume change leads to uneven expansion and thickness of the individual cells, causing slippage between them and resulting in deformation of the entire lithium metal battery pack, thus affecting the charging and discharging stability of the individual cells. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a honeycomb structure battery box that can apply uniform binding force in multiple directions of individual cells to prevent slippage between individual cells.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] This application provides a honeycomb structure battery housing, comprising: a battery module including a single battery cell, wherein the bottom of the single battery cell has an expansion groove, and the top of the single battery cell has a first receiving area and a second receiving area; a supporting assembly including a first support block, a second support block and a third support block, wherein the first support block is disposed in the expansion groove, the second support block is disposed in the first receiving area, and the third support block is disposed in the second receiving area; and a limiting assembly including a first buffer plate and a second buffer plate, wherein the first buffer plate and the second buffer plate are respectively located on both sides of the single battery cell.

[0006] It also includes a busbar, which is disposed on the individual battery cell.

[0007] The top support assembly also includes a compression cover, which is disposed on the busbar.

[0008] It also includes a heat dissipation component, which includes a heat-conducting shell disposed on the single battery cell, a first buffer plate disposed on one side of the heat-conducting shell, a second buffer plate disposed on the other side of the heat-conducting shell, and a first support block connected to the bottom of the heat-conducting shell.

[0009] It also includes a housing assembly, which includes a connector and a cable, the connector being electrically connected to the individual battery cell, and the cable being electrically connected to the connector.

[0010] The housing assembly also includes an insulating plate disposed on the battery module.

[0011] The housing assembly also includes a cover plate disposed on the insulating plate.

[0012] The housing assembly also includes a support frame disposed on the cover plate.

[0013] The housing assembly also includes a base plate, which is disposed on the support frame.

[0014] The housing assembly also includes a mounting base disposed on the connector.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] The first support block is used to apply force to the expansion groove at the bottom of the single cell to prevent excessive expansion at the bottom; the first and second buffer plates are used to apply force to the entire left and right sides of the single cell, while the second and third support blocks are used to apply force to the two reserved receiving areas at the top of the single cell. In this way, force can be applied to the single cell in multiple directions to prevent slippage between single cells. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0018] Figure 1 This is a schematic diagram of the battery module in one embodiment of the present invention;

[0019] Figure 2 This is an exploded view of the battery module in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of a single battery cell in one embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of another embodiment of the single-cell battery in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the honeycomb structure battery box in one embodiment of the present invention;

[0023] Figure 6 This is an exploded view of the honeycomb structure battery box in one embodiment of the present invention. Detailed Implementation

[0024] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0025] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Currently, the individual cells within the lithium metal battery pack in a honeycomb structure battery case exhibit a "deep breathing" effect during charging and discharging. This "deep breathing" effect refers to the significant volume change of individual cells during charging and discharging. This volume change leads to uneven expansion and thickness of the individual cells, causing slippage between them and resulting in deformation of the entire lithium metal battery pack, thus affecting the charging and discharging stability of the individual cells.

[0028] To address the aforementioned issues, this application provides a honeycomb structure battery housing that can apply uniform binding forces in multiple directions to individual cells, preventing slippage between individual cells.

[0029] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4A honeycomb structure battery box includes: a battery module 100, a top support assembly 200, and a limiting assembly 300. The battery module 100 includes a single battery cell 110. The bottom of the single battery cell 110 has an expansion groove 111, and the top of the single battery cell 110 has a first receiving area 112 and a second receiving area 113. The top support assembly 200 includes a first support block 210, a second support block 220, and a third support block 230. The first support block 210 is disposed in the expansion groove 111, the second support block 220 is disposed in the first receiving area 112, and the third support block 230 is disposed in the second receiving area 113. The limiting assembly 300 includes a first buffer plate 310 and a second buffer plate 320, which are respectively located on both sides of the single battery cell 110.

[0031] It should be noted that the bottom of the single battery cell 110 has a reserved expansion space in the thickness direction during charging and discharging. This expansion space is called an expansion groove 111. The depth of the expansion groove 111 changes with the state of charge of the single battery cell. The higher the charge, the shallower the expansion groove 111. The expansion groove 111 is the deepest when the charge is 0%. In order to effectively provide a binding force to the bottom of the single battery cell 110, a first support block 210 is used to fill the bottom expansion groove 111 of the single battery cell 110. The first support block 210 is made of soft foam material, which can adapt to different indentation depths when the single battery cell 110 produces a "deep breathing" effect without abrading the aluminum-plastic film.

[0032] Furthermore, because the thin lithium metal negative electrode cannot be bent, the top seal of the single cell 110 is much taller than that of a traditional lithium-ion battery. Additionally, to accommodate expansion at the top, a cavity is provided in the area where the top seal of the single cell 110 contacts the electrode. This cavity prevents the top of the single cell from being directly constrained. By providing a second support block 220 and a third support block 230, made of a relatively rigid foam material, the second and third support blocks 210 can fill the first receiving area 112 and the second receiving area 113 of the single cell 110, thus preventing excessive slippage at the top of the single cell 110.

[0033] Furthermore, by setting a first buffer plate 310 and a second buffer plate 320, which are disposed on both sides of the single cell 110 and attached to both sides of the external heat-conducting shell 510 of the single cell 110, the buffer plates can absorb the thickness expansion caused by electrochemical mechanical stress during the charging process of the single cell 110, and at the same time provide a certain amount of resilience to the large surface of the single cell 110, so as to avoid the thin lithium metal negative electrode lithium ion deposition being loose, affecting the battery performance and cycle life of the single cell 110. At the same time, the buffer plates cover the entire large surface of the single cell 110, which can maintain the flatness of the large surface of the single cell 110 during charging and discharging, and prevent the thin lithium metal negative electrode from deforming too much, which could cause an internal short circuit in the single cell 110.

[0034] The above settings ensure that the deformation of the single cell 110 in the vertical direction is within a controllable and safe range.

[0035] Please see Figure 2 In one embodiment, a honeycomb structure battery housing further includes a busbar 400, which is disposed on the individual battery cell 110.

[0036] It should be noted that this application has multiple battery modules 100, and the battery modules 100 are connected to each other by a busbar 400.

[0037] Please see Figure 2 In one embodiment, the support assembly 200 further includes a compression cover 240 disposed on the busbar 400.

[0038] It should be noted that, in order to enhance the binding force, a compression cover 240 will be fitted on the battery module 100 to limit and bind the individual batteries 110 inside the battery module 100 and prevent slippage between the individual batteries 110.

[0039] Please see Figure 2 In one embodiment, a honeycomb structure battery housing further includes a heat dissipation assembly 500, which includes a heat-conducting shell 510 disposed on a single cell 110, a first buffer plate 310 disposed on one side of the heat-conducting shell 510, a second buffer plate 320 disposed on the other side of the heat-conducting shell 510, and a first support block 210 connected to the bottom of the heat-conducting shell 510.

[0040] It should be noted that the heat-conducting shell 510 is made of graphene and is fitted onto the single cell 110. The sides and bottom of the single cell 110 are all heat-conducted through the graphene heat-conducting shell.

[0041] Please see Figure 5 and Figure 6In one embodiment, a honeycomb structure battery housing further includes a housing assembly 600, which includes a connector 610 and a cable 620. The connector 610 is electrically connected to a single battery cell 110, and the cable 620 is electrically connected to the connector 610. Specifically, the housing assembly 600 further includes an insulating plate 630 disposed on the battery module 100. Specifically, the housing assembly 600 further includes a cover plate 640 disposed on the insulating plate 630. Specifically, the housing assembly 600 further includes a supporting frame 650 disposed on the cover plate 640. Specifically, the housing assembly 600 further includes a base plate 660 disposed on the supporting frame 650.

[0042] It should be noted that both the cover plate 640 and the base plate 660 are made of alloy material, which has high specific strength and specific stiffness, and can limit the bottom and top of the single cell 110. The supporting frame 650 adopts a honeycomb structure design, which can restrain the single cell 110 in the thickness direction and the side direction.

[0043] It should also be noted that the top of the battery module 100 is covered with a low-density plastic insulating board, leaving only the area for electrical connection welding between battery modules 100. The battery modules 100 are electrically connected using busbars 400, which have the advantage of a flat design, reducing the height of the battery pack and increasing the overall volume and weight efficiency of the battery pack. Furthermore, after the busbars 400 between battery modules 100 are welded, the welding area reserved on the insulating board 630 is insulated, sealed, and fixed with sealant. Foam is filled between the cover plate 640 and the insulating board 630 to ensure that the second support block 210 and the third support block 220, which suppress the deformation of the top of the individual battery cells 110, can function effectively. This is because the insulating board 630 and the sealant prevent the foam from flowing into the battery module 100, thus avoiding the foam puncturing the aluminum-plastic film during the charging and discharging of the individual battery cells 110.

[0044] Please see Figure 5 and Figure 6 In one embodiment, the housing assembly 600 further includes a mounting base 670 disposed on the connector 610.

[0045] It is understandable that the mounting bracket 670 adopts a partially protruding design in order to reduce the height of the battery box body.

[0046] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0047] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A honeycomb structure battery box, characterized in that, include: A battery module includes a single battery cell, wherein an expansion groove is formed at the bottom of the single battery cell, and a first receiving area and a second receiving area are formed at the top of the single battery cell. The top support assembly includes a first support block, a second support block, and a third support block. The first support block is disposed within the expansion groove, the second support block is disposed within the first receiving area, and the third support block is disposed within the second receiving area. The limiting component includes a first buffer plate and a second buffer plate, which are respectively located on both sides of the single battery cell.

2. The honeycomb structure battery box according to claim 1, characterized in that, It also includes a busbar, which is disposed on the individual battery cell.

3. The honeycomb structure battery box according to claim 2, characterized in that, The top support assembly also includes a compression cover, which is disposed on the busbar.

4. The honeycomb structure battery box according to claim 1, characterized in that, It also includes a heat dissipation component, which includes a heat-conducting shell disposed on the single battery cell, a first buffer plate disposed on one side of the heat-conducting shell, a second buffer plate disposed on the other side of the heat-conducting shell, and a first support block connected to the bottom of the heat-conducting shell.

5. The honeycomb structure battery box according to claim 1 or 4, characterized in that, It also includes a housing assembly, which includes a connector and a cable, the connector being electrically connected to the individual battery cell, and the cable being electrically connected to the connector.

6. The honeycomb structure battery box according to claim 5, characterized in that, The housing assembly also includes an insulating plate disposed on the battery module.

7. The honeycomb structure battery box according to claim 6, characterized in that, The housing assembly also includes a cover plate disposed on the insulating plate.

8. The honeycomb structure battery box according to claim 7, characterized in that, The housing assembly also includes a support frame disposed on the cover plate.

9. The honeycomb structure battery box according to claim 8, characterized in that, The housing assembly also includes a base plate, which is disposed on the support frame.

10. The honeycomb structure battery box according to claim 8, characterized in that, The housing assembly also includes a mounting base disposed on the connector.

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