End plate structure

Abstract

The utility model relates to the technical field of batteries, in particular to an end plate structure. The end plate structure comprises a light aluminum plate, an anti-explosion valve and a lower plastic plate. The anti-explosion valve is arranged on the light aluminum plate, and the lower plastic plate is arranged on one side, facing the pole group, of the light aluminum plate; the position, corresponding to the anti-explosion valve, of the lower plastic plate is provided with a vent hole which can be communicated with the anti-explosion valve and the pole group; the conduction area of the vent holes is adjustable so as to adapt to the pole groups made of different materials. In conclusion, the conduction area of the conduction hole can be adjusted according to the material of the battery, so that the protection effect of the explosion-proof valve on the battery is ensured. That is to say, for different batteries, the conduction areas of the conduction holes are determined in a targeted manner, so that the anti-explosion valve is more sensitive.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an end plate structure. Background Art

[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the performance and safety of lithium-ion batteries are increasing.

[0003] The lithium battery end plate is a core component for safety and assembly, and its structural design is crucial to the safety of the electrode group. The existing end plate corresponds to the position of the explosion-proof valve, and the number of conduction holes is fixed, which cannot meet the needs of electrode groups of different materials during explosion.

[0004] Therefore, there is an urgent need for an end plate structure to solve the technical problems existing in the prior art to a certain extent. Utility Model Content

[0005] The purpose of the present application is to provide a lifting device, which can overcome the technical problem in the prior art that the number of through holes is fixed and cannot meet the requirements of pole groups of different materials during explosion.

[0006] The present application provides an end plate structure, comprising a plain aluminum plate, an explosion-proof valve and a lower plastic plate; the explosion-proof valve is arranged on the plain aluminum plate, and the lower plastic plate is arranged on the side of the plain aluminum plate facing the electrode group; the lower plastic plate is provided with a vent hole that can connect the explosion-proof valve and the electrode group at a position corresponding to the explosion-proof valve;

[0007] The conduction area of ​​the vent hole is adjustable to adapt to the electrode groups of different materials.

[0008] In the above technical solution, further, the lower plastic plate includes a main plate and a movable plate;

[0009] The movable plate corresponds to the position of the explosion-proof valve;

[0010] The vent hole is provided on the movable plate;

[0011] The movable plate is detachably connected to the main board, and the movable plate with different vent holes can be replaced according to the electrode groups of different materials, so that the conduction area of ​​the vent holes can be adjusted.

[0012] In the above technical solution, further, the ventilation holes are provided in plurality, and the plurality of ventilation holes are opened on the movable plate in a dispersed manner and / or in a matrix manner.

[0013] In the above technical solution, further, the mainboard is provided with a mounting hole at a position corresponding to the explosion-proof valve;

[0014] A first end of the movable plate along the length direction or the width direction of the main plate is connected to a side wall of the mounting hole via a detachable component.

[0015] In the above technical solution, further, the detachable component includes a first limit block and a limit shaft;

[0016] The first limiting block is arranged on the side wall of the mounting hole, and a limiting groove is provided on the first limiting block;

[0017] The mounting block is arranged at the first end of the movable plate, one end of the limiting shaft is connected to the mounting block and the other end is clamped to the first limiting block;

[0018] The limiting shaft can be clamped on or removed from the first limiting block, so that the first end of the movable plate is detachably connected to the main plate.

[0019] In the above technical solution, further, the first limiting block is arranged on the outer side wall of the mounting hole, and the opening end of the limiting groove faces the pole group side.

[0020] In the above technical solution, further, a second end of the movable plate which is away from the first end is connected to a side wall of the mounting hole by clamping.

[0021] In the above technical solution, further, the mounting hole is provided with a second limit block corresponding to the second end of the movable plate, and the second end of the movable plate is provided with a clamping block;

[0022] The clamping block can be clamped on or removed from the second limiting block, so that the second end of the movable plate is fixed to or separated from the mounting hole.

[0023] In the above technical solution, further, the second limiting block is arranged on the inner wall of the mounting hole, and a clamping space is formed between the second limiting block and the inner wall of the mounting hole, and the clamping block has a clamping hook, and the clamping hook can be clamped in or removed from the clamping space.

[0024] In the above technical solution, further, the movable plate is made of PC material.

[0025] The present application also provides a battery, comprising the above-mentioned end plate structure.

[0026] Compared with the prior art, the beneficial effects of this application are:

[0027] The present application provides an end plate structure, comprising a plain aluminum plate, an explosion-proof valve and a lower plastic plate; the explosion-proof valve is arranged on the plain aluminum plate, and the lower plastic plate is arranged on the side of the plain aluminum plate facing the electrode group; the lower plastic plate is provided with a vent hole that can connect the explosion-proof valve and the electrode group at a position corresponding to the explosion-proof valve;

[0028] The conduction area of ​​the vent hole is adjustable to adapt to the electrode groups of different materials.

[0029] In summary, the present application can adjust the conduction area of ​​the conduction hole according to the material of the battery, thereby ensuring the protection of the explosion-proof valve on the battery. That is, for different batteries, the conduction area of ​​the conduction hole is determined in a targeted manner, making the explosion-proof valve more sensitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of the end plate structure (the movable plate opens the main plate) provided in the first embodiment of the present application at a first viewing angle;

[0032] Figure 2 A side view of the end plate structure (the movable plate opens the main plate) provided in the first embodiment of the present application;

[0033] Figure 3 A top view of the end plate structure provided in Example 1 of the present application;

[0034] Figure 4 for Figure 3 AA section view;

[0035] Figure 5 A schematic structural diagram of the end plate structure (the movable plate opens the main plate) provided in the first embodiment of the present application at a second viewing angle;

[0036] Figure 6 for Figure 5 A magnified image of point A;

[0037] Figure 7 This is a cross-sectional view of the end plate structure (the movable plate is buckled onto the main plate) provided in the first embodiment of the present application.

[0038] Reference numerals:

[0039] 1-plain aluminum plate; 2-explosion-proof valve; 4-lower plastic plate; 5-main board; 6-movable plate; 7-ventilation hole; 8-mounting hole; 9-first limit block; 10-limiting shaft; 11-limiting groove; 12-second limit block; 13-clamping block; 14-clamping space; 15-clamping hook; 16-mounting block. DETAILED DESCRIPTION

[0040] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0041] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0042] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0043] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0044] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0045] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0046] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0047] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0048] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0049] Embodiment 1

[0050] Combination Figure 1-Figure 7 As shown, an end plate structure provided by the present application is described in detail.

[0051] In this embodiment, an end plate structure is provided, which is buckled on the shell, and an installation space is surrounded between the end plate and the shell. This installation space is used to place the pole group. In order to ensure the safety of the pole group, an explosion-proof valve 2 is installed on the end plate. The explosion-proof valve 2 can control the pressure of the gas in the first aspect: when gas is generated inside the battery, the explosion-proof valve 2 can control the pressure of the gas inside the battery through its own pressure control device, so as to keep it within a safe range, and prevent the battery from exploding or catching fire due to excessive expansion. The explosion-proof valve 2 can relieve the overcharge pressure in the second aspect: sometimes, some users will overcharge the battery, resulting in excessive pressure gas inside the battery. At this time, the pole group explosion-proof valve 2 will automatically open to release the internal pressure, so as to achieve the effect of protecting the battery. The explosion-proof valve 2 can prevent accidents caused by external force extrusion in the third aspect: there is a layer of polymer diaphragm inside the lithium battery, which can isolate the positive and negative electrodes to prevent short circuit. However, once external force extrusion occurs, the diaphragm may rupture, the positive and negative electrodes short-circuit, and cause the battery to explode.

[0052] Specifically, the end plate junction includes a plain aluminum plate 1, an explosion-proof valve 2 and a lower plastic plate 4; wherein the explosion-proof valve 2 is arranged at the center of the plain aluminum plate 1, and the lower plastic plate 4 is arranged on the side of the plain aluminum plate 1 facing the pole group.

[0053] Specifically, a vent hole 7 is opened at the position of the lower plastic plate 4 corresponding to the explosion-proof valve 2 , and the vent hole 7 can connect the explosion-proof valve 2 and the electrode group, that is, when the electrode group generates gas, it can be guided to the explosion-proof valve 2 through the vent hole 7 .

[0054] Specifically, the conduction area of ​​the vent 7 is adjustable, that is, in actual use, the appropriate conduction area can be selected and determined according to the material of the electrode group; for example, the speed and amount of gas generation of lithium batteries, zinc-silver batteries, and zinc-manganese batteries are different. For batteries that generate gas quickly, the conduction area of ​​the vent 7 can be increased, so that the explosion-proof valve 2 can be opened quickly to prevent the battery from exploding. For batteries that generate gas slowly, the conduction area can be appropriately reduced.

[0055] In summary, the present application can adjust the conduction area of ​​the conduction hole according to the material of the battery, thereby ensuring the protection of the explosion-proof valve 2 to the battery. That is, for different batteries, the conduction area of ​​the conduction hole is determined in a targeted manner, making the explosion-proof valve 2 more sensitive.

[0056] In this embodiment, combined Figure 1 As shown, the lower plastic plate 4 includes a main plate 5 and a movable plate 6.

[0057] Specifically, the movable plate 6 corresponds to the position of the explosion-proof valve 2 , and the vent hole 7 is provided on the movable plate 6 .

[0058] Specifically, the movable plate 6 is detachably connected to the main board 5, that is, the movable plate 6 can be fixed on the main board 5 or can be removed from the main body; for different batteries, movable plates 6 with different numbers of conducting holes can be selected; for example, for batteries that generate gas quickly, the movable plate 6 with a larger number of conducting holes can be replaced, because a larger number of conducting holes has a larger conducting area, which can quickly guide the gas to the explosion-proof valve 2.

[0059] In summary, the lower plastic plate 4 is disassembled into two parts, one part is the main board 5 which is attached to the plain aluminum plate 1, and the other part is the movable plate 6 which can be fixed on the plain aluminum plate 1 and can also be removed from the plain aluminum plate 1. For different batteries, suitable movable plates 6 can be selected to meet the needs of different batteries.

[0060] In a first preferred embodiment, the plurality of vent holes 7 are dispersed, that is, the arrangement of the vent holes 7 is irregular.

[0061] In a second preferred embodiment, the vias are arranged in a matrix, such as Figure 5 As shown in , they are arranged in a 5×5 matrix.

[0062] In a third preferred embodiment, a portion of the vent holes 7 are arranged in a dispersed manner, and another portion of the conductive holes are arranged in a matrix manner.

[0063] It is worth noting that the shape of the vent hole 7 is not specifically limited, and can be, for example, Figure 5 The waist-shaped hole shown in the figure can also be a circular through hole (not shown in the figure), or a rectangular through hole (not shown in the figure), etc.

[0064] In this embodiment, a mounting hole 8 is provided at a position of the main board 5 corresponding to the explosion-proof valve 2, and the first end of the movable plate 6 along the length direction of the main board 5 is connected to the side wall of the mounting hole 8 through a detachable component, or the first end of the movable plate 6 along the width direction of the main board 5 is connected to the side wall of the mounting hole 8 through a detachable component. The through-hole detachable component can remove the first end of the movable plate 6 from the main board 5.

[0065] Specifically, combined Figure 6 As shown, the detachable component includes a first limit block 9, a limit shaft 10 and a mounting block 16; wherein two first limit blocks 9 are provided, and the two first limit blocks 9 are arranged on the side walls of the mounting hole 8. Preferably, the two first limit blocks 9 are arranged on the outer side walls of the mounting hole 8, and the two first limit blocks 9 are symmetrically arranged about the long axis of the main board 5. wherein a limit slot 11 is provided on the first limit block 9; preferably, the open end of the limit slot 11 faces the pole group side. wherein the mounting block 16 is provided at the first end of the movable plate 6, and an installation space is formed between the two first limit blocks 9, and the mounting block 16 is just located in the installation space; wherein the limit shaft 10 passes through the mounting block 16, and the two ends of the limit shaft 10 passing through the mounting block 16 are clamped in the limit slot 11.

[0066] In actual use, the limit shaft 10 can be limited in the limit groove 11, so that the first end of the movable plate 6 can be fixed to the main board 5, and the limit shaft 10 can be taken out of the limit groove 11 to remove the first end of the movable plate 6 from the main board 5.

[0067] The above-mentioned matching mode of the first limiting block 9, the limiting shaft 10 and the mounting block 16 has a simple structure and is easy to operate.

[0068] In this embodiment, the second end of the movable plate 6 is connected to the side wall of the mounting hole 8 by clamping. Preferably, the second end of the movable plate 6 is connected to the inner wall of the mounting hole 8 by clamping. The second end of the movable plate 6 here refers to the other end opposite to the movable plate 6.

[0069] Specifically, the second end of the movable plate 6 is connected to the mounting hole 8 by a snap-fit ​​connection, so that the second end of the movable plate 6 can be fixed to the main board 5 or removed from the main board 5 .

[0070] Specifically, a second limit block 12 is provided at the second end of the mounting hole 8 corresponding to the movable plate 6, and a clamping block 13 is provided at the second end of the movable plate 6; the clamping block 13 can be clamped in or removed from the second limit block 12 to fix the second end of the movable plate 6 to or detach from the mounting hole 8.

[0071] Specifically, a snap-in space 14 is formed between the inner side walls of the mounting hole 8 of the second limit block 12, and a snap-in hook 15 is provided on the snap-in block 13. The snap-in hook 15 can be snapped into or removed from the snap-in space 14, so that the second end of the movable plate is fixed to or detached from the mounting hole 8.

[0072] Combination Figure 1 , 2 , 4, 5, and 6 are schematic diagrams showing that the first end of the movable plate 6 is fixed to the main plate 5, and the second end is opened to the main plate 5;

[0073] Combination Figure 7 , which shows a schematic diagram in which the first end and the second end of the movable plate 6 are both fixed to the main plate 5 .

[0074] In this embodiment, the movable plate 6 is made of PC material, and the main board 5 is made of PVC material, that is, the movable plate 6 made of PC material has greater strength and plays a better supporting role for the explosion-proof valve 2. In addition, only part of the movable plate 6 is made of PC material, which reduces the overall research and development cost of the end cover.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An end plate structure, comprising a plain aluminum plate, an explosion-proof valve and a lower plastic plate; the explosion-proof valve is arranged on the plain aluminum plate, and the lower plastic plate is arranged on the side of the plain aluminum plate facing the electrode group; characterized in that: The lower plastic plate is provided with a vent hole at a position corresponding to the explosion-proof valve, which can connect the explosion-proof valve and the pole group; The conduction area of ​​the vent hole is adjustable to adapt to the electrode groups of different materials.

2. The end plate structure according to claim 1, characterized in that: The lower plastic plate includes a main plate and a movable plate; The movable plate corresponds to the position of the explosion-proof valve; The vent hole is provided on the movable plate; The movable plate is detachably connected to the main board, and the movable plate with different vent holes can be replaced according to the electrode groups of different materials, so that the conduction area of ​​the vent holes can be adjusted.

3. The end plate structure according to claim 2, characterized in that: A plurality of ventilation holes are provided, and the plurality of ventilation holes are opened on the movable plate in a dispersed manner and / or in a matrix manner.

4. The end plate structure according to claim 2, characterized in that: The motherboard corresponds to A mounting hole is provided at the position of the explosion-proof valve; A first end of the movable plate along the length direction or the width direction of the main plate is connected to a side wall of the mounting hole via a detachable component.

5. The end plate structure according to claim 4, characterized in that: The detachable component includes a first limiting block, a limiting shaft and a mounting block; The first limiting block is arranged on the side wall of the mounting hole, and a limiting groove is provided on the first limiting block; The mounting block is arranged at the first end of the movable plate, one end of the limiting shaft is connected to the mounting block and the other end is clamped to the first limiting block; The limiting shaft can be clamped on or removed from the first limiting block, so that the first end of the movable plate is detachably connected to the main plate.

6. The end plate structure according to claim 5, characterized in that: The first limiting block is arranged on the outer side wall of the mounting hole, and the opening end of the limiting groove faces the pole group side.

7. The end plate structure according to claim 4, characterized in that: A second end of the movable plate, which is away from the first end, is connected to a side wall of the mounting hole by clamping.

8. The end plate structure according to claim 6, characterized in that: The mounting hole is provided with a second limiting block corresponding to the second end of the movable plate, and the second end of the movable plate is provided with a clamping block; The clamping block can be clamped on or removed from the second limiting block, so that the second end of the movable plate is fixed to or separated from the mounting hole.

9. The end plate structure according to claim 8, characterized in that: The second limiting block is arranged on the inner side wall of the mounting hole, and a clamping space is formed between the second limiting block and the inner side wall of the mounting hole. The clamping block is provided with a clamping hook, and the clamping hook can be clamped in or removed from the clamping space.

10. The end plate structure according to claim 2, characterized in that: The movable plate is made of PC material.

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