Plastic shell with novel structure

Abstract

The utility model discloses a plastic shell with a novel structure, which comprises a plastic shell base, a plurality of partitions arranged in parallel are arranged in the plastic shell base, an inner cavity and cavities are arranged among the partitions, a horizontal pole group is placed in the inner cavity, and the cavities are distributed around the inner cavity; the inner cavity is cylindrical, and the cavity is located between the inner cavity and the partition. The supporting force of the bottom surface is large enough, the electrochemical reaction of the pole group enables the active substance to expand and contract to generate a downward action which is not enough to deform the bottom surface of the plastic shell, and the gravity action of the pole group enables the upward acting force generated by the contraction of the active substance to be counteracted, so that upward expansion cannot be realized; the reaction temperature of the pole group can be kept at 34-40 DEG C, a good temperature control effect is achieved, the reaction efficiency of the pole group is improved, and the utilization rate of active substances of the pole group is further improved; the position of the pole group is fixed, and the residual space in the inner cavity can be occupied, so that the rapid reduction of the battery performance caused by a large amount of free acid in the internal unoccupied part is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of lead-acid battery structures, and in particular to a new structural plastic shell. Background Art

[0002] Due to the continuous expansion of the lithium-ion battery application market, lead-acid batteries are in urgent need of innovation and the utilization rate of active materials is urgently needed. At present, the pole group structure of the battery used in the market is mostly square, and the pole ears of the grid used in the pole group are set on the outer frame of the grid, so that the current density at the lower position away from the pole ears is relatively small; the utilization rate of the active material of the pole group is low, and the utilization rate of the active material in the upper and lower parts of the pole group is poor. The upper current density is large, the corrosion progress of the grid is accelerated, the utilization rate of the active material in the lower part is low, and the active material is more likely to muddy, eventually causing the battery to fail prematurely. In order to match the placement of the square pole group, the inner cavity of the plastic shell is also designed to be square. Due to the electrochemical reaction, the plate surface direction of the pole group generates a large force on the plastic shell. As the use time increases, the battery is prone to bulging; during the battery manufacturing process, the pole group force makes the volume of the inner cavity on both sides larger than the middle cell, resulting in more acid in the cells on both sides, causing the cells on both sides to fail prematurely; and the reaction temperature of the middle cell of the structure can only be transmitted to the cells on both sides. The high temperature of the middle cell will accelerate the corrosion of the grid and cause the battery to fail.

[0003] For example, a "structurally reinforced lead-acid battery plastic case" disclosed in Chinese patent literature, with the announcement number: CN215266467U, discloses a trough body reinforcement groove including two outer side walls of the trough body along the arrangement direction of each partition plate, each of which is provided with a top surface opening; a plurality of first reinforcing ribs are arranged in the trough body reinforcement groove along the arrangement direction of each partition plate and across the trough body reinforcement groove. However, in this scheme, the electrochemical reaction of the pole group causes the active material to expand and contract, so that the pressure surface is constantly subjected to the action of the pole group, which accelerates the expansion of the plastic case, thereby reducing the binding force of the plastic case on the pole group, causing the active material to expand and fall off, resulting in battery failure; and there are fewer heat dissipation surfaces, and the heat inside the battery can only be transferred to the air through the pressure surface, and the heat dissipation efficiency is too low, resulting in excessively high internal battery temperature, accelerating grid corrosion and sulfation of the active material; the pole group is placed vertically in the plastic case, and high-density sulfuric acid continuously settles at the bottom, accelerating the sulfation of the active material. Summary of the invention

[0004] In order to solve the problem in the prior art that the pole group is affected by the plastic shell structure, resulting in low utilization of active substances, the present invention provides a new structural plastic shell, which greatly improves the utilization of active substances in the pole group and its consistency by changing the arrangement of the pole group and adding a pole group limiting structure and a temperature control structure.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A new structure plastic shell includes a plastic shell base, a plurality of parallel partitions are arranged in the plastic shell base, an inner cavity and a cavity are arranged between the plurality of partitions, a horizontal pole group is placed in the inner cavity, and the cavity is distributed around the inner cavity; the inner cavity is cylindrical, and the cavity is located between the inner cavity and the partition. The bottom surface of the plastic shell is subjected to pressure, and the supporting force is large enough. The electrochemical reaction of the pole group causes the active material to expand and contract, and the downward force is not enough to deform the bottom surface of the plastic shell. The gravity of the pole group offsets the upward force generated by the contraction of the active material, and it cannot expand upward.

[0007] Preferably, a constant temperature phase change material is arranged in the cavity, and the constant temperature phase change material maintains the temperature at 34-40 degrees Celsius. The constant temperature phase change material is evenly arranged in each cavity. The reaction temperature of the pole group can be maintained at 34-40°C, which plays a good temperature control role, improves the reaction efficiency of the pole group, and further improves the utilization rate of the active substances of the pole group.

[0008] Preferably, a limiting column is provided in the inner cavity, the limiting column is located on the bottom end surface of the inner cavity, and the limiting column is connected to the pole group. It can limit the movement of the pole group, fix the position of the pole group and occupy the remaining space in the inner cavity 3, so as to prevent a large amount of free acid from appearing in the empty part inside, causing a sharp decline in battery performance.

[0009] Preferably, the plastic shell base comprises a shell of a square structure, the top of the shell has an opening, and the baffle is parallel to the shorter side of the shell, so that the baffle is arranged in the length direction of the plastic shell.

[0010] Preferably, the partition divides the plastic shell base into a plurality of square areas of the same size, and the height of the partition is the same as the side of the plastic shell base, so as to realize the separate placement of a plurality of horizontal pole groups.

[0011] Preferably, a circular separator is provided in the square area, the diameter of the circular separator is slightly smaller than the spacing between adjacent partitions, and the circular separator abuts against the partitions to achieve the placement of a horizontal pole group.

[0012] Preferably, the inner cavity is located in the circular partition, the cavity is located outside the circular partition, the cavity and the inner side of the side wall of the plastic shell base, and the cavity is located between the circular partition and the barrier. The movement of the pole group can be restricted.

[0013] Preferably, a slot is provided in the limiting column, the slot opens upward, and the slot is connected to the pole group to achieve the fixation of the pole group.

[0014] The present invention has the following advantages:

[0015] (1) The supporting force of the bottom surface is large enough. The downward force caused by the expansion and contraction of the active material due to the electrochemical reaction of the electrode group is not enough to deform the bottom surface of the plastic shell. The upward force caused by the contraction of the active material due to the gravity of the electrode group is offset, and it cannot expand upward; (2) The reaction temperature of the electrode group can be maintained at 34-40℃, which plays a good temperature control role, improves the reaction efficiency of the electrode group, and further improves the utilization rate of the active material of the electrode group; (3) The position of the electrode group is fixed, and it can occupy the remaining space in the inner cavity to prevent a large amount of free acid from appearing in the empty space inside, causing a sharp decline in battery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described below are merely exemplary. A person skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0017] Figure 1 It is a schematic diagram of the structure of this solution in the embodiment.

[0018] Figure 2 Schematic diagram of the conventional battery plastic shell structure in the embodiment.

[0019] In the figure:

[0020] 1-partition; 2-pressure surface; 3-inner cavity; 4-cavity; 5-limiting column; 6-circular separator; 7-plastic shell base. DETAILED DESCRIPTION

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0022] As shown in FIG1 , in a preferred embodiment, the present invention discloses a new structure plastic shell, including: a plastic shell base 7, wherein the plastic shell base 7 is a shell of a rectangular structure, wherein the shell material includes composite materials such as plastic. The shell is open upwards and has no upper cover. The pole group of the lead-acid battery is placed through the plastic shell base 7. The plastic shell base 7 is provided with mutually parallel partitions 1, wherein the partitions 1 are parallel to the shorter side of the plastic shell base 7. The height of the partitions 1 is the same as the edge height of the plastic shell base 7, and the partitions 1 divide the plastic shell base 7 into a plurality of square areas of the same size, wherein the bottom surface of the square area includes a pressure surface 2, and the pressure surface 2 bears the effect of the expansion and contraction of the active substances in the pole group, so that the force generated by the expansion and contraction of the active substances caused by the electrochemical reaction in the pole group will not expand the plastic shell, so that the binding force of the plastic shell on the pole group will not be reduced, thereby avoiding the expansion and shedding of the active substances and improving the life of the battery.

[0023] A circular separator 6 is provided in the square area, and the circular separator 6 re-divides the space of the square area between adjacent partitions 1 into a cavity 4 and an inner cavity 3. The placement area of ​​the pole group is further determined. Among them, the space inside the circular separator 6 is the inner cavity 3, so the inner cavity 3 is a cylindrical space on the square area in the circular separator 6. The inner cavity 3 is used to place a horizontal pole group, and the expansion of the active material in the horizontal pole group will not cause compression to the side wall of the plastic shell. The outer end faces of the circular separator 6 are respectively in contact with the side walls of the partition 1 and the plastic shell base 7, and the outer end faces of the circular separator 6 are respectively tangent to the side walls of the partition 1 and the plastic shell base 7. At this time, the area enclosed by the outer end faces of the circular separator 6 and the side walls of the partition 1 and the plastic shell base 7 is a cavity 4, so the cavity 4 is located at the four corners of the square area. Therefore, the cavities 4 located in the same square area are arranged in a centrally symmetrical array, so that the circular partition 6 in the square area is separated by the cavities 4 on all sides, which is convenient for the heat dissipation of the horizontal pole group placed in the circular partition 6, so that the temperature of the horizontal pole group in the circular partition 6 will not be directly transferred to the plastic shell base 7 and blocked by the plastic shell base 7 to cause poor heat dissipation effect.

[0024] Furthermore, the cavity 4 is filled with a constant temperature phase change material, and the temperature of the horizontal pole group in the inner cavity 3 is controlled by the constant temperature phase change material, so that the reaction temperature of the horizontal pole group is maintained at 34-40 degrees Celsius. In the above temperature range, the reaction efficiency of the horizontal pole group is more efficient, and the activity of the active material in the horizontal pole group is further improved, ensuring the service life of the battery. When in use, when the electrochemical reaction occurs inside the horizontal pole group in the circular separator 6, the temperature generated by the horizontal pole group is transferred to the cavity 4 through the circular separator 6, and the constant temperature phase change material in the cavity 4 abuts against the outer end face of the circular separator 6, and absorbs the heat transferred from the outer end face of the circular separator 6; the outer side of the constant temperature phase change material abuts against the inner side of the side wall of the plastic shell base 7 and the partition 1, and the constant temperature phase change material releases the heat absorbed from the circular separator 6 from the side wall of the plastic shell base 7 through heat exchange, thereby realizing temperature control when the temperature of the horizontal pole group rises. When the temperature of the horizontal pole group decreases, since the constant temperature phase change material is evenly and symmetrically arranged around the circular partition 6, the constant temperature phase change material transfers heat to the circular partition 6, thereby increasing the temperature of the horizontal pole group in the circular partition 6, and the constant temperature phase change material obtains heat from the side wall of the plastic shell base 7, thereby achieving constant temperature control of the horizontal pole group and ensuring that the horizontal pole group in the circular partition 6 is within a constant temperature range.

[0025] Through the above-mentioned settings, the reaction temperature of the active substances in the horizontal pole group during electrochemical reactions is also within a constant temperature range, which greatly increases the reaction efficiency of the electrochemical reactions in the horizontal pole group, and the active substances therein also have better activity within this specific temperature range, thereby achieving improved utilization of the active substances and reducing the problem of active substances losing activity.

[0026] In the center of the inner cavity 3, a limiting column 5 is provided on the pressure surface 2, and the limiting column 5 is fixedly arranged on the bottom surface of the plastic shell base 7, and the limiting column 5 is located in the center of the square area. The limiting column 5 is used to limit the horizontal pole group, restrict the movement of the horizontal pole group in the inner cavity 3, and fix the horizontal pole group in the center of the inner cavity 3. At this time, when an electrochemical reaction occurs in the horizontal pole group, causing the expansion and contraction of the active material, so that a gap is generated between the horizontal pole group and the circular separator 6, the limiting column 5 can still ensure the stability of the horizontal pole group, prevent the horizontal pole group from shaking in the plastic shell base 7, and prevent the horizontal pole group from shaking and colliding or squeezing the circular separator 6, thereby causing loss of the active material in the horizontal pole group, causing the active material to fall off, and in severe cases causing battery failure. In addition, the limiting column 5 can also occupy the remaining space in the inner cavity 3. When the horizontal electrode group is placed in the inner cavity 3, there is still a lot of free space in the circular partition 6. Too much free space is easy to produce a large amount of free acid in the electrochemical reaction. When a large amount of free acid appears, the battery performance is greatly reduced, further ensuring the life of the battery.

[0027] A slot is provided at the top of the limiting column 5, and the slot divides the limiting column 5 into two parts, the left and right parts of the limiting column 5 are symmetrical about the center of the slot. The width of the slot is the same as the width of one of the left and right parts, the slot opens upward, and the slot extends downward to the bottom surface of the plastic shell base 7. The slot is used to further fix the horizontal pole group, preventing the horizontal pole group from forming more free space in the inner cavity 3. The setting of the slot makes the limiting column 5 fit more closely with the horizontal pole group, the connection is more stable, and gaps are avoided.

[0028] When in use, the left and right parts of the limiting column 5 respectively fix the horizontal pole group from both sides of the slot. When an electrochemical reaction occurs in the horizontal pole group, the active material expands and contracts, and the left and right parts of the limiting column 5 respectively block the active material. At this time, after the left and right sides of the limiting column 5 located on the right part are squeezed by the active material, the limiting column 5 will transfer the squeezing force of the active material on one side to the active material on the other side, and the squeezing force of the active material on the other side is the same, thereby achieving the balance of the squeezing force of the active material and avoiding the active material from being squeezed outward; after the left and right sides of the limiting column 5 located on the left part are squeezed by the active material, the limiting column 5 will transfer the squeezing force of the active material on one side to the active material on the other side, and the squeezing force of the active material on the other side is the same. In this way, the extrusion deformation of the active material in the empty space is avoided, and the expansion and shedding of the active material in the empty space position is avoided, which may cause the battery to fail in serious cases.

[0029] When an electrochemical reaction occurs in the horizontal pole group, the active material expands and squeezes the left and right parts of the limiting column 5 downward from the top of the limiting column 5. The limiting column 5 is supported by the bottom surface of the plastic shell base 7 while the active material is squeezed. At this time, the bottom surface of the plastic shell base 7 provides pressure to prevent deformation. When the active material shrinks due to the electrochemical reaction, due to the gravity of the active material itself, the active material still abuts against the outer end surface of the limiting column 5 and the bottom surface of the plastic shell base 7. A reliable reaction space is provided for the active material, avoiding the problems of the active material falling off and the plastic shell deformation caused by the electrochemical reaction in the horizontal pole group.

[0030] In addition, since the molded case base 7 is divided into a plurality of square areas for accommodating horizontal pole groups by the partition 1, and symmetrically arranged cavities 4 are provided at adjacent positions of each square area, constant temperature phase change materials are provided in the cavities 4. When the electrochemical reactions of the horizontal pole groups have different temperatures, the horizontal pole groups in the inner cavities 3 in different square areas are marked as the first horizontal pole group and the second horizontal pole group in sequence from left to right, and the cavities 4 therein are marked as the first cavity 4 and the second cavity 4 in sequence. When the temperature of the first horizontal pole group is high, the first horizontal pole group simultaneously radiates heat to the bottom surface of the molded case base 7 and the surrounding first cavity 4, and the first cavity 4 receives heat from the first horizontal pole group. At this time, the constant temperature phase change material in the first cavity 4 simultaneously radiates heat to the side walls of the molded case base 7 and the adjacent second cavity 4, thereby achieving rapid temperature stabilization. When the temperature of the second horizontal pole group is low, the second horizontal pole group obtains heat from the adjacent second cavity 4 and the bottom surface of the plastic shell base 7. At this time, the second horizontal pole group dissipates heat to the surrounding second horizontal pole group. At the same time, the constant temperature phase change material in the second cavity 4 obtains heat from the adjacent first cavity 4 or third cavity 4, thereby realizing the mutual influence of temperature between adjacent horizontal pole groups and ensuring the temperature stability of each horizontal pole group in the plastic shell base 7.

[0031] The slot is U-shaped, and the two ends of the U-shape are the left and right parts of the limiting column 5, and the side wall of the slot is a vertical flat surface, and the vertical flat surface is parallel to the shorter side wall of the plastic shell base 7. The left and right parts of the limiting column 5 are symmetrically arranged semi-cylinders, which can better abut against the horizontal pole group, fill the empty space in the inner cavity 3, and better fix the horizontal pole group. Prevent the horizontal pole group from shaking when it is subjected to external force from the plastic shell base 7.

[0032] In another embodiment, Figure 2 As shown, the barrier 1 and pressure surface 2 of the traditional battery overlap and are arranged in the length direction of the plastic shell. Due to the electrochemical reaction of the pole group, the active material expands and contracts, so that the pressure surface 2 is constantly subjected to the action of the pole group, which accelerates the expansion of the plastic shell, thereby reducing the binding force of the plastic shell on the pole group, causing the active material to expand and fall off, resulting in battery failure; and the traditional structure of the plastic shell has less heat dissipation surface, and the heat inside the battery can only be transferred to the air through the pressure surface 2. The heat dissipation efficiency is too low, resulting in excessively high internal battery temperature, which accelerates grid corrosion and sulfation of active materials; the pole group is placed vertically in the plastic shell, and high-density sulfuric acid continuously settles at the bottom, accelerating the sulfation of active materials.

[0033] like Figure 2 As shown, a new structure plastic shell, the baffle 1 is set in the length direction of the plastic shell, the pole group is placed horizontally in the plastic shell, the pressure surface 2 of the plastic shell is the bottom surface of the plastic shell, the supporting force of the bottom surface is large enough, the electrochemical reaction of the pole group causes the active material to expand and contract, and the downward force is not enough to deform the bottom surface of the plastic shell, and the gravity of the pole group offsets the upward force generated by the contraction of the active material, and it cannot expand upward; the inner cavity 3 is used to place the horizontal pole group, and the inner cavity 3 and the baffle 1 form a symmetrical cavity 4, and a constant temperature phase change material is stored in the cavity 4, which can keep the reaction temperature of the pole group at 34-40°C, play a good temperature control role, improve the reaction efficiency of the pole group, and further improve the utilization rate of the active material of the pole group; a limiting column 5 is set in the inner cavity 3 to limit the movement of the pole group, fix the position of the pole group, and can occupy the remaining space in the inner cavity 3 to prevent a large amount of free acid from appearing in the internal free part, causing a sharp decline in battery performance.

[0034] These modifications or improvements made on the basis of the present invention without departing from the spirit of the present invention all fall within the scope of protection required by the present invention.

Claims

1. A new structural plastic shell, characterized in that: include: A plastic shell base, wherein a plurality of partitions are arranged in parallel, an inner cavity and a hollow cavity are arranged between the plurality of partitions, a horizontal pole group is placed in the inner cavity, and the hollow cavity is distributed around the inner cavity; the inner cavity is cylindrical, and the hollow cavity is located between the inner cavity and the partitions.

2. A new structural plastic shell according to claim 1, characterized in that: A constant temperature phase change material is arranged in the cavity, and the constant temperature phase change material maintains the temperature at 34-40 degrees Celsius.

3. A new structural plastic shell according to claim 1 or 2, characterized in that: A limiting column is arranged in the inner cavity, the limiting column is located on the bottom end surface of the inner cavity, and the limiting column is connected to the pole group.

4. A new structural plastic shell according to claim 1 or 2, characterized in that: The plastic shell base comprises a shell with a square structure, the top of the shell is provided with an opening, and the partition is parallel to the shorter side of the shell.

5. The new structural plastic shell according to claim 3, characterized in that: The partitions divide the plastic shell base into a plurality of square areas of the same size, and the height of the partitions is the same as the side of the plastic shell base.

6. A new structural plastic shell according to claim 5, characterized in that: A circular separator is arranged in the square area, the diameter of the circular separator is slightly smaller than the spacing between adjacent partitions, and the circular separator abuts against the partitions.

7. A new structural plastic shell according to claim 6, characterized in that: The inner cavity is located in the circular partition, the cavity is located outside the circular partition, the cavity and the inner side of the side wall of the plastic shell base, and the cavity is located between the circular partition and the partition.

8. The new structural plastic shell according to claim 3, characterized in that: A slot is provided in the limiting column, the slot opens upward, and the slot is connected to the pole group.

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