A high specific energy battery plastic case and battery

Abstract

The utility model relates to a high-energy-density battery plastic case and a battery, belonging to the technical field of storage batteries, and is used to solve at least one of the problems of poor sealing, easy swelling of the side, easy leakage, and low battery life of existing batteries. A high-energy-density battery plastic case includes an upper cover, a lower cover, a battery slot, and a side cover. The side cover of the utility model is provided with transverse reinforcing ribs and oblique reinforcing ribs. The oblique reinforcing ribs can generate transverse and longitudinal tension, and can better reduce the swelling of the middle part of the pressure surface. A transverse reinforcing rib is provided in the middle position of the side cover. Through the tension of the adjacent oblique reinforcing ribs, the strength of the middle reinforcing rib is increased, and the expansion degree of this part is greatly reduced, thereby increasing the consistency of the acid content and saturation of the battery cell, thereby increasing the cycle life of the battery; the metal connecting strip avoids the excessive current density causing the connecting strip to heat up or even melt; the metal connecting strip is designed inside the battery, so that the battery will not have the risk of battery leakage due to the metal connecting strip.

Description

Technical Field

[0001] The utility model relates to the technical field of storage batteries, in particular to a high-energy-density battery plastic shell and a battery. Background Art

[0002] The pole group is the energy storage unit that makes up the battery. It is composed of pole plates and separators. The pole plates contain grids and active materials. The grid structure directly affects the utilization rate of the active materials in the battery. Most of the pole ears of the battery grid are generally located on the upper frame of the grid. Several horizontal ribs and vertical ribs are evenly arranged in the four frames. This structure of the grid will cause the current density in the lower position away from the pole ears to be small, the utilization rate of active materials is low, and the consistency of the utilization rate of active materials in the upper and lower parts is poor. The current density in the upper part is large, the corrosion progress of the grid is accelerated, the utilization rate of the active materials in the lower part is low, and the active materials are more likely to become muddy, which eventually causes the battery to fail prematurely.

[0003] In order to improve the utilization rate of the upper and lower active materials, the existing patent CN114566722A adopts the arrangement of pole ears on both the upper and lower frames of the grid, the pole ears of the same polarity of the upper frame are connected by an upper bus, the pole ears of the same polarity of the lower frame are connected by a lower bus, and the same polarity buses of the upper and lower frames are connected by wires. First, wires are used to connect the upper and lower buses. The wires are mostly made of copper and aluminum, and are welded together with lead buses, which makes the preparation complicated. Second, during the use of the battery, the bus needs to carry a large current density. The wires are thin and easily heat up or even melt when a large current passes through them. Since the sealant groove of the upper cover is small, it cannot accommodate large wires. After the battery is sealed, the gap between the battery slot and the upper and lower covers must be very small to prove that the battery is well sealed. If thicker wires are used, the battery cover cannot be sealed. Third, the battery is sealed with epoxy resin glue. The wires and epoxy resin glue are not completely miscible. The tiny gap between the wires and the epoxy resin glue forms a channel, and the electrolyte in the battery diffuses to the outside through this channel, causing the battery to leak.

[0004] In addition, the active materials expand and contract repeatedly, and the utilization rate of the active materials in the upper and lower parts of the battery with this structure is improved. The expansion of the active materials exerts a greater force on the pressure surface of the plastic shell, making the side of the plastic shell easily bulge, causing the volume of the two cells on the side of the battery to increase, thereby increasing the acid content and saturation of the cells, causing the two cells to lag behind, and ultimately affecting the cycle life of the battery. Utility Model Content

[0005] In view of the above analysis, the utility model aims to provide a high-energy-density battery plastic case and battery to solve at least one of the problems of existing batteries, such as poor sealing, inconvenient installation, easy bulging of the sides, easy leakage, and short battery life.

[0006] In the first aspect, the utility model provides a high-energy-density battery plastic case, comprising an upper cover, a lower cover, a battery slot and a side cover, wherein the upper end and the lower end of the battery slot are respectively provided with an upper opening and a lower opening, and the upper opening and the lower opening are respectively connected to the upper cover and the lower cover, and the two opposite sides of the battery slot are respectively connected to the side cover, wherein a groove is provided in the vertical direction on the side surface, and two slide grooves are provided in the horizontal direction, a buckle is provided on one side of the side cover corresponding to the slide groove, and a plurality of reinforcing ribs are provided on the other side of the side cover.

[0007] Furthermore, the two slide grooves are at the same distance from the upper end surface and the lower end surface of the side cover.

[0008] Furthermore, the buckle is movably connected to the groove, and the buckle slides and engages in the groove to fix the side surface on the battery slot.

[0009] Furthermore, the reinforcing ribs include transverse reinforcing ribs and oblique reinforcing ribs, and the oblique reinforcing ribs are symmetrically arranged up and down with the transverse reinforcing ribs as the symmetry axis.

[0010] Furthermore, the transverse reinforcing ribs are arranged parallel to the horizontal plane.

[0011] Furthermore, the oblique reinforcement ribs are composed of first oblique ribs and second oblique ribs, and the included angle between the first oblique ribs and the second oblique ribs is 100-140°.

[0012] Furthermore, a side cover partition is respectively arranged on the upper and lower end surfaces of the side cover, and the side cover partition is arranged in coordination with the upper end and the lower end of the battery slot.

[0013] Furthermore, the upper cover and the lower cover are respectively provided with side cover baffle rubber grooves, and the side cover baffles are matched with the side cover baffle rubber grooves.

[0014] In the second aspect, the utility model provides a high-energy-density battery including the above-mentioned plastic shell, wherein the battery also includes multiple grids, and the upper frame and the lower frame of the grid are each provided with at least one pole ear, the same polarity pole ears of the upper frame are connected by an upper bus, the same polarity pole ears of the lower frame are connected by a lower bus, and the same polarity buses of the upper frame and the lower frame are connected by a metal connecting strip.

[0015] Furthermore, the metal connecting strip is matched with the groove, and the cross-sectional area of ​​the metal connecting strip matches the cross-sectional area of ​​the upper and lower busbars.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] (1) The side cover of the utility model is provided with transverse reinforcing ribs and oblique reinforcing ribs. The oblique reinforcing ribs can generate transverse and longitudinal tension, which can better reduce the swelling of the middle part of the pressure surface. Since the swelling degree of the middle part of the side is the largest during the battery cycle, a transverse reinforcing rib is provided in the middle part of the side cover. Through the tension of the adjacent oblique reinforcing ribs, the strength of the middle reinforcing rib is increased, and the swelling degree of this part is greatly reduced, thereby improving the consistency of the acid content and saturation of the battery cell, thereby improving the cycle life of the battery;

[0018] (2) The side cover of the utility model is provided with a side cover partition on both the upper and lower end surfaces, and the side cover partition is provided in cooperation with the upper and lower ends of the battery slot, and the side cover wraps the metal connecting strip so that it is not exposed to the outside. In addition, the metal connecting strip is on the battery side cover, so the normal structure battery cannot be completely sealed. The side cover partition on the side cover of the utility model helps to seal the battery;

[0019] (3) The same polarity buses of the upper frame and the lower frame in the utility model are connected by a metal connecting strip. The metal connecting strip is made of lead material, which is more convenient for welding. The cross-sectional area of ​​the metal connecting strip is more compatible with the cross-sectional area of ​​the upper and lower buses, avoiding the heating or even melting of the connecting strip caused by excessive current density. The metal connecting strip is designed inside the battery. The battery is sealed by epoxy resin glue, so that the metal connecting strip can be sealed inside the battery, so that the battery will not have the risk of battery leakage due to the metal connecting strip.

[0020] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the following content, and some advantages can be obvious from the description or understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the text and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0022] Figure 1 This is an exploded view of a high specific energy battery plastic case of the utility model;

[0023] Figure 2 This is a schematic diagram of a side cover structure of the utility model;

[0024] Figure 3 The utility model is an exploded diagram of a high specific energy battery.

[0025] Reference numerals:

[0026] 1-upper cover, 2-lower cover, 21-side cover partition rubber groove, 3-battery slot, 31-groove, 32-slide groove, 4-side cover, 41-clip, 42-first oblique rib, 43-second oblique rib, 44-side cover partition, 45-transverse reinforcement rib, 5-metal connecting strip. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0028] A specific embodiment of the utility model is as follows Figure 1-2 As shown, a high-energy-density battery plastic case is disclosed, including an upper cover 1, a lower cover 2, a battery slot 3 and a side cover 4, wherein the upper end and the lower end of the battery slot 3 are respectively provided with an upper opening and a lower opening, and the upper opening and the lower opening are respectively connected to the upper cover 1 and the lower cover 2, and the two opposite sides of the battery slot 3 are respectively connected to the side cover 4, wherein the side surface is provided with a groove 31 in the vertical direction and two slide grooves 32 in the horizontal direction, a buckle 41 is provided on one side of the side cover 4 corresponding to the slide groove 32, and a plurality of reinforcing ribs are provided on the other side of the side cover 4.

[0029] When the battery is used in a cycle, the active material repeatedly expands and contracts, the utilization rate of the active material in the upper and lower parts of the battery is improved, and the expansion of the active material exerts a greater force on the pressure surface of the plastic shell, making the side of the plastic shell easily bulge, resulting in the volume of the two cells on the side of the battery becoming larger, thereby increasing the acid content and saturation of the cells, causing the two cells to lag behind, and ultimately affecting the cycle life of the entire battery. The plastic shell of the utility model is provided with multiple reinforcing ribs on the side, which can better reduce the bulging of the middle part of the pressure surface, thereby improving the consistency of the acid content and saturation of the battery cells, thereby improving the cycle life of the battery.

[0030] In a specific embodiment, the two slide grooves 32 are at the same distance from the upper end surface and the lower end surface of the side cover 4 .

[0031] In a specific embodiment, the buckle 41 is movably connected to the groove 31 , and the buckle 41 is slidably engaged in the groove 31 so that the side surface is fixed on the battery slot 3 .

[0032] It should be noted that the groove 31 in the present invention intersects with the two slide grooves 32 , and the reinforcing ribs are fixedly arranged on the side cover 4 .

[0033] In a specific embodiment, Figure 2As shown, the reinforcing ribs include transverse reinforcing ribs 45 and oblique reinforcing ribs, and the oblique reinforcing ribs are symmetrically arranged up and down with the transverse reinforcing ribs 45 as the symmetry axis.

[0034] In a preferred embodiment, the transverse reinforcing ribs 45 are arranged parallel to the horizontal plane.

[0035] In a preferred embodiment, the oblique reinforcement ribs are composed of first oblique ribs 42 and second oblique ribs 43, and the included angle between the first oblique ribs 42 and the second oblique ribs 43 is 100-140°.

[0036] It should be noted that the transverse reinforcing rib 45 described in the utility model is provided with one, and the oblique reinforcing ribs described are provided with six. The oblique reinforcing ribs can generate horizontal and vertical tension, which can better reduce the swelling of the middle part of the pressure surface. Since the swelling degree of the middle position of the side is the largest during the battery cycle, a transverse reinforcing rib 45 is provided in the middle position of the side cover 4. Through the tension of the adjacent oblique reinforcing ribs, the strength of the middle reinforcing rib is increased, and the swelling degree of this part is greatly reduced, thereby improving the consistency of the acid content and saturation of the battery cell, thereby improving the cycle life of the battery.

[0037] In a specific embodiment, a side cover partition 44 is respectively disposed on the upper and lower end surfaces of the side cover 4 , and the side cover partition 44 is matched with the upper end and the lower end of the battery slot 3 .

[0038] In a specific embodiment, the upper cover 1 and the lower cover 2 are respectively provided with side cover barrier rubber grooves 21 , and the side cover barrier 44 is provided in cooperation with the side cover barrier rubber grooves 21 .

[0039] It should be noted that the thickness of the side cover partition 44 is smaller than the thickness of the side cover 4, and one side surface of the side cover partition 44 is on the same horizontal plane as the side surface of the side cover having the buckle 41. When the buckle 41 on the side cover 4 is inserted into the slide groove 32 on the battery slot 3, the side cover 4 fits with the battery slot 3, and the side cover partition 44 fits with the upper end and the lower part of the battery slot 3, and cooperates with the partition rubber grooves on the upper cover 1 and the lower cover 2, thereby making the sealing of the plastic shell better.

[0040] The side cover 4 of the utility model is provided with a side cover baffle 44 on both upper and lower end surfaces, and the side cover baffle 44 is provided in cooperation with the upper and lower ends of the battery slot 3, and the side cover 4 wraps the metal connecting strip 5 so that it is not exposed to the outside. In addition, the metal connecting strip 5 is on the battery side cover 4, so the battery of a normal structure cannot be completely sealed, and the side cover baffle 44 on the side cover 4 of the utility model helps to seal the battery.

[0041] Another specific embodiment of the present invention is as follows Figure 3As shown, a high specific energy battery including the above-mentioned battery plastic case is disclosed.

[0042] In a specific embodiment, the battery includes multiple grids, and the upper frame and the lower frame of the grid are each provided with at least one pole ear, the same polarity pole ears of the upper frame are connected through an upper bus, the same polarity pole ears of the lower frame are connected through a lower bus, and the same polarity buses of the upper frame and the lower frame are connected through a metal connecting strip 5.

[0043] In a specific embodiment, the metal connecting bar 5 is matched with the groove 31 , and the cross-sectional area of ​​the metal connecting bar 5 matches the cross-sectional area of ​​the upper and lower bus bars.

[0044] It should be noted that the metal connecting bar 5 in the present invention is made of lead and is welded to the upper and lower bus bars, and equipment can be used for more convenient welding; the cross-sectional area of ​​the metal connecting bar 5 is more compatible with the cross-sectional area of ​​the upper and lower bus bars, avoiding heating or even melting of the connecting bar due to excessive current density; the metal connecting bar 5 is designed to be inside the battery, and the battery is sealed by epoxy resin glue, so that the metal connecting bar can be sealed inside the battery, so that the battery will not have the risk of battery leakage due to the metal connecting bar.

[0045] The technical solution of the present utility model is further explained below in conjunction with specific embodiments.

[0046] Example 1

[0047] like Figure 1 and 2 As shown, a high-energy-density battery plastic case includes an upper cover 1, a lower cover 2, a battery slot 3 and a side cover 4, wherein the upper end and the lower end of the battery slot 3 are respectively provided with an upper opening and a lower opening, and the upper opening and the lower opening are respectively connected to the upper cover 1 and the lower cover 2, and the two opposite sides of the battery slot 3 are respectively connected to one of the side covers 4, wherein the side faces are provided with a groove 31 in the vertical direction and two slide grooves 32 in the horizontal direction, a buckle 41 is provided on one side of the side cover 4 corresponding to the slide groove 32, and a plurality of reinforcing ribs are provided on the other side of the side cover 4.

[0048] In this embodiment, the two slide grooves 32 are at the same distance from the upper end surface and the lower end surface of the side cover 4, and the two slide grooves 32 are arranged in parallel; the buckle 41 is movably connected to the groove 31, and the buckle 41 slides and snaps into the groove 31. The buckle 41 slides and is inserted into the groove 31 to fix the side cover 4 on the battery slot 3.

[0049] Specifically, Figure 2As shown, the reinforcing ribs of this embodiment include one transverse reinforcing rib 15 and six oblique reinforcing ribs, and the oblique reinforcing ribs are symmetrically arranged up and down with the transverse reinforcing rib 45 as the symmetry axis. The transverse reinforcing rib 45 is arranged parallel to the horizontal plane. The oblique reinforcing ribs are composed of a first oblique rib 42 and a second oblique rib 43, and the angle between the first oblique rib 41 and the second oblique rib 43 is 120°.

[0050] A side cover baffle 44 is respectively arranged on the upper and lower end surfaces of the side cover 4 , and a side cover baffle rubber groove 21 is respectively arranged on the upper cover 1 and the lower cover 2 , and the side cover baffle 44 is arranged in coordination with the side cover baffle rubber groove 21 .

[0051] Example 2

[0052] A high-energy-density battery of the present embodiment includes the electromagnetic plastic shell of Example 1, and the battery includes multiple grids. The upper frame and the lower frame of the grid are each provided with a pole ear. The pole ears of the upper frame are connected by an upper bus, and the pole ears of the lower frame are connected by a lower bus. The buses of the upper and lower frames are connected by a metal connecting strip 5. The metal connecting strip 5 is matched with the groove 31, and the cross-sectional area of ​​the metal connecting strip 5 matches the cross-sectional area of ​​the upper and lower buses.

[0053] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A high specific energy battery plastic case, characterized in that: It includes an upper cover, a lower cover, a battery slot and a side cover, wherein the upper end and the lower end of the battery slot are respectively provided with an upper opening and a lower opening, wherein the upper opening and the lower opening are respectively connected to the upper cover and the lower cover, and the two opposite sides of the battery slot are respectively connected to the side cover, wherein the side surface is provided with a groove in the vertical direction and two slide grooves in the horizontal direction, a buckle is provided on one side of the side cover corresponding to the slide groove, and a plurality of reinforcing ribs are provided on the other side of the side cover.

2. A high specific energy battery plastic case according to claim 1, characterized in that: The two slide grooves are at the same distance from the upper end surface and the lower end surface of the side cover.

3. A high specific energy battery plastic case according to claim 1 or 2, characterized in that: The buckle is movably connected to the groove, and the buckle is slidably engaged in the groove so that the side surface is fixed on the battery slot.

4. The high specific energy battery plastic case according to claim 1, characterized in that: The reinforcing ribs include transverse reinforcing ribs and oblique reinforcing ribs, and the oblique reinforcing ribs are symmetrically arranged up and down with the transverse reinforcing ribs as the symmetry axis.

5. The high specific energy battery plastic case according to claim 4, characterized in that: The transverse reinforcing ribs are arranged parallel to the horizontal plane.

6. The high specific energy battery plastic case according to claim 4, characterized in that: The oblique reinforcing ribs are composed of first oblique ribs and second oblique ribs, and the included angle between the first oblique ribs and the second oblique ribs is 100-140°.

7. The high specific energy battery plastic case according to claim 1, characterized in that: A side cover partition is respectively arranged on the upper and lower end surfaces of the side cover, and the side cover partition is arranged in coordination with the upper end and the lower end of the battery slot.

8. The high specific energy battery plastic case according to claim 7, characterized in that: The upper cover and the lower cover are respectively provided with side cover baffle rubber grooves, and the side cover baffles are matched with the side cover baffle rubber grooves.

9. A high specific energy battery comprising the plastic case according to any one of claims 1 to 8, characterized in that: The battery also includes multiple grids, and the upper frame and the lower frame of the grid are each provided with at least one pole ear, the pole ears of the upper frame with the same polarity are connected by an upper bus, the pole ears of the lower frame with the same polarity are connected by a lower bus, and the buses of the upper frame and the lower frame with the same polarity are connected by a metal connecting strip.

10. The high specific energy battery according to claim 9, characterized in that: The metal connecting strip is matched with the groove, and the cross-sectional area of ​​the metal connecting strip matches the cross-sectional area of ​​the upper and lower busbars.

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