Storage battery

Abstract

The utility model relates to a storage battery, which belongs to the field of battery manufacturing, not only solves the problem that a clapboard adsorbs epoxy glue, but also enables the height of a polar plate to be maximized in a limited space, and improves the performance of the battery. According to the storage battery designed by the utility model, the paraffin layer region corresponding to the glue adding region on the inner side of the battery cover is arranged on the end surface of the partition plate, and the paraffin layer can effectively isolate the contact between the partition plate and epoxy glue, so that the aims of protecting the partition plate and preventing the partition plate from absorbing the epoxy glue are fulfilled, and the height of the polar plate and the performance of the battery are improved to the greatest extent.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a storage battery with an anti-climbing rubber layer. Background Art

[0002] A battery is a device that converts chemical energy into electrical energy. A storage battery is a type of battery that is designed to be rechargeable. After a storage battery is discharged, it can be charged to regenerate the internal active substances, store electrical energy as chemical energy, and convert the chemical energy into electrical energy again when it needs to be discharged. The storage battery we usually refer to is usually a lead-acid battery, that is, a battery whose electrodes are mainly made of lead and its oxides, and whose electrolyte is a sulfuric acid solution. In the discharged state, the main component of the positive electrode is lead dioxide, and the main component of the negative electrode is lead. In the charged state, the main components of the positive and negative electrodes are both lead sulfate. Lead-acid batteries are mainly composed of tubular positive plates, negative plates, electrolytes, separators, battery slots, battery covers, poles, and liquid filling caps.

[0003] At present, the packaging forms of batteries include glue sealing, heat sealing, etc. Most car batteries are heat sealed, most electric vehicles are glue sealed, and lead-acid batteries are generally sealed with epoxy resin adhesives specially used for batteries. Epoxy resin is a high molecular polymer with a molecular formula of (C 11 H 12 O 3 )n, refers to a general term for a class of polymers containing more than two epoxy groups in the molecule. It is a condensation product of epichlorohydrin and bisphenol A or polyols. Due to the chemical activity of the epoxy group, it can be opened with a variety of compounds containing active hydrogen, cured and cross-linked to form a network structure, so it is a thermosetting resin. The excellent physical, mechanical and electrical insulation properties of epoxy resin, its bonding properties with various materials, and the flexibility of its use process are not possessed by other thermosetting plastics. Therefore, it can be made into coatings, composite materials, casting materials, adhesives, molding materials and injection molding materials, and is widely used in various fields of the national economy.

[0004] In recent years, in order to increase the capacity of the battery, increasing the height and area of ​​the plate is an effective way to increase the battery energy (the plate area is proportional to the capacitance, the larger the area, the greater the capacitance). When the plate is raised to a certain height, the separator between the positive and negative plates must also be raised accordingly, otherwise there will be a risk of short circuit. When the separator is raised to a certain height, it will be closer to the epoxy glue. Because the ultra-fine glass fiber separator has a large number of holes, the epoxy glue is continuously absorbed onto the separator through capillary phenomena, resulting in too little glue in the seal, resulting in poor sealing of the groove and cover; or after the separator absorbs the glue into a solid state, it cannot absorb acid, resulting in insufficient acid volume in the battery and insufficient battery capacity. Both seriously affect battery performance. Utility Model Content

[0005] In view of the above analysis, the utility model aims to provide a storage battery to solve the problem of poor battery sealing caused by insufficient amount of epoxy glue after the separator absorbs the epoxy glue and the problem of reduced battery capacity caused by insufficient acid absorption performance after the separator absorbs the glue. The purpose of the utility model is mainly achieved through the following technical solutions:

[0006] A storage battery comprises a battery tank, a battery cover sealing the end of the battery tank, a plurality of polar plates arranged in the battery tank, a partition between the polar plates and a bus bar;

[0007] The battery slot includes a plurality of cells disposed in the middle, and a battery cover is provided at the upper end and / or the lower end thereof;

[0008] The battery cover is provided with a glue groove inside, and the glue groove is a glue filling area;

[0009] The end surface of the partition is provided with a paraffin layer area corresponding to the glue-filled area on the inner side of the battery cover.

[0010] Specifically, the battery cover includes a busbar accommodating cavity.

[0011] Specifically, the paraffin layer area is larger than the glue-added area; the paraffin layer area includes the epoxy glue overflow area of ​​the glue-added area after the battery cover is sealed; and the paraffin layer area forms an anti-glue creeping layer.

[0012] Specifically, the overflow range is 2 to 3 mm.

[0013] Specifically, the paraffin layer is a paraffin sheet layer.

[0014] Specifically, the thickness of the paraffin layer is 0.5 to 2 mm.

[0015] Specifically, the paraffin layer area is around the busbar on the end surface of the partition and / or around the battery slot on the end surface of the partition, and has a width of 3 to 5 mm.

[0016] Specifically, the paraffin sheet in each area is a relatively independently arranged strip-shaped paraffin sheet, and the width of the strip-shaped paraffin sheet is 3 to 5 mm.

[0017] Specifically, the battery cover also includes a battery lower cover that seals the lower end of the battery slot, and a glue groove is provided inside the battery lower cover, and the glue groove is a glue filling area; the lower end surface of the partition is provided with a paraffin layer area corresponding to the glue filling area inside the battery lower cover.

[0018] Specifically, the wax layer area corresponding to the glue-added area on the inner side of the battery lower cover is the surrounding area of ​​the busbar and has a width of 3 to 5 mm.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] 1) The battery has a large capacity. In order to increase the capacity of the battery, it can be achieved by increasing the height and area of ​​the plate. When the plate is raised to a certain height, the partition between the positive and negative plates must also be raised accordingly, otherwise there will be a risk of short circuit. When the partition is raised to a certain height, it will be closer to the epoxy glue. The utility model is provided with a paraffin layer area on the end face of the partition corresponding to the glue-filled area on the inner side of the battery cover, and the paraffin layer can effectively isolate the partition from contact with the epoxy glue. Compared with batteries of the same specifications and sizes, the utility model can maximize the height of the plate and maximize the use of the internal space. In addition, the partition will not absorb glue, which can further increase the height of the plate and further improve the weight-to-energy ratio of the battery.

[0021] 2) Reduce process difficulty and cost. When the partition of an ordinary lead-acid battery is raised to a certain height, when the partition on the pole group is uneven, or there is a little more glue in the glue groove of the battery cover, or the impact of the glue sealing operation causes the glue to splash, or the glue sealing surface is uneven, part of the partition will be in direct contact with the liquid glue or the distance is relatively close during the glue sealing. The utility model is provided with a paraffin layer area corresponding to the glue filling area on the inner side of the battery cover on the end face of the partition, and the paraffin layer can effectively isolate the partition from contact with the epoxy glue. Reduce the difficulty of the operating process at the board wrapping and improve the board wrapping production efficiency. Avoid battery scrapping due to uneven partitions during board wrapping. Reduce the difficulty of the operating process at the glue sealing and improve the glue sealing production efficiency. The method is effective, simple and easy to implement, and low in cost.

[0022] 3) Higher safety. Covering the upper part of the partition with paraffin wax can buffer the growth of the plate to a certain extent, alleviate the electrochemical corrosion of the grid, and avoid the risk of short circuit caused by the positive plate growing and contacting the negative busbar during the use of the battery. The specific principle is: during the charging and discharging process of the battery, the volume of the lead (active substance) in the positive plate will shrink or expand. After multiple charges and discharges, the grid at the core of the positive plate will be deformed due to the "pulling" of the active substance, causing the positive plate to grow upward. The longer the time, the faster the growth. Some batteries are caused by the positive plate growing to a certain value and contacting the negative electrode, resulting in a short circuit, which eventually leads to battery failure; however, when there is paraffin wax on the upper part of the partition, after the positive plate grows to a certain value, there is a layer of paraffin wax on the upper part. Paraffin wax is a non-conductive material, which can effectively prevent the positive plate from contacting the negative electrode, thus preventing the positive and negative electrodes from short circuiting.

[0023] 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

[0024] 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.

[0025] Figure 1 It is a schematic diagram of the upper structure of a lead-acid battery (excluding the upper cover);

[0026] Figure 2 For Figure 1 Schematic diagram of the paraffin layer area above the partition;

[0027] Figure 3 The schematic diagram of the lower structure of a battery (excluding the lower cover) having bus bars at both the upper and lower parts;

[0028] Figure 4 A schematic diagram of adding a paraffin layer to the lower part of a battery with bus bars at the upper and lower parts;

[0029] Figure 5 Schematic diagram of adding glue to the battery cover;

[0030] Figure 6 Schematic diagram of adding glue to the lower cover of a battery with bus bars on the upper and lower parts;

[0031] Figure 7 A bar chart comparing the discharge capacities of two batteries manufactured in Example 1 and Comparative Example 1;

[0032] Figure 8 A comparison chart of the cycle life of two batteries manufactured in Example 1 and Comparative Example 1;

[0033] Fig. 9 The figure is a bar chart comparing the discharge capacities of two batteries manufactured in Example 2 and Comparative Example 2.

[0034] Reference numerals:

[0035] 1-busbar; 2-partition; 3-pole; 4-battery lower cover; 5-battery upper cover; 6-bottom plate; 7-battery slot; 8-sealant; 9-paraffin; 10-mesh. DETAILED DESCRIPTION

[0036] 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.

[0037] A storage battery comprises a battery tank, a battery cover sealing the end of the battery tank, a plurality of polar plates arranged in the battery tank, a partition between the polar plates and a bus bar;

[0038] The battery slot includes a plurality of cells in the middle, each cell can hold a pole group, and the upper and / or lower ends of the cells are provided with a battery cover;

[0039] The pole group is composed of pole plates and separators placed in sequence.

[0040] The battery cover is provided with a glue groove inside, and the glue groove is a glue filling area;

[0041] The battery cover includes a busbar accommodating cavity;

[0042] The end surface of the partition is provided with a paraffin layer area corresponding to the glue filling area inside the battery cover. The paraffin layer 9 can prevent the partition 2 from contacting the sealant 8 by mechanical isolation. The thickness of the paraffin layer is 0.5-2 mm.

[0043] Furthermore, the paraffin layer area is larger than the glue-added area; the paraffin layer area includes the epoxy glue overflow area of ​​the glue-added area after the battery cover is sealed; and the paraffin layer area forms an anti-glue creeping layer.

[0044] Specifically, the overflow range is 2 to 3 mm.

[0045] Specifically, the paraffin layer is a paraffin sheet layer.

[0046] Specifically, the thickness of the paraffin layer is 0.5 to 2 mm.

[0047] Specifically, the paraffin layer area is around the busbar on the end surface of the partition and / or around the battery slot on the end surface of the partition, and has a width of 3 to 5 mm.

[0048] Specifically, the paraffin sheet in each area is a relatively independently arranged strip-shaped paraffin sheet, and the width of the strip-shaped paraffin sheet is 3 to 5 mm.

[0049] Specifically, the battery also includes a battery lower cover that seals the lower end of the battery slot, a glue groove is provided inside the battery lower cover, and the glue groove is a glue filling area; the lower end surface of the partition is provided with a paraffin layer area corresponding to the glue filling area inside the battery lower cover.

[0050] Specifically, the wax layer area corresponding to the glue-added area on the inner side of the battery lower cover is the surrounding area of ​​the busbar and has a width of 3 to 5 mm.

[0051] Furthermore, the battery may be a lead-acid battery having only the busbar 1 on the upper portion. The structural diagram of the upper portion (excluding the upper cover) is shown in FIG. Figure 1 shown.

[0052] Specifically, for a lead-acid battery having only a busbar 1 on the upper portion, a layer of paraffin wax 9 is provided around the busbar 1 on the upper surface of the partition 2 and around the battery slot 7 on the upper surface of the partition 2, with a width of 3 to 5 mm. The specific adding position is as follows: Figure 2 As shown in the figure, the battery is similar to the conventional lead-acid battery, and is composed of a busbar 1, a partition 2, a pole 3, a battery cover 5, a battery slot 7, etc.

[0053] Furthermore, the battery can be a lead-acid battery with busbars 1 at the upper and lower parts, a bottom plate 6 is arranged in the middle of the busbar 1 at the lower part of the battery, and the structural schematic diagram of the lower part (excluding the lower cover) is as shown in FIG. Figure 3 shown.

[0054] Specifically, the lead-acid battery with busbars 1 at the upper and lower parts has a layer of paraffin wax 9 around the busbars 1 on the upper surface of the partition 2 and around the battery slots 7 on the upper surface of the partition 2, with a width of 3 to 5 mm, and a position as shown in FIG. Figure 2 As shown in FIG. 1 , the area where the paraffin 9 is located represents the location of the paraffin layer. There is also a layer of paraffin 9 with a width of 3 to 5 mm around the busbar 1 on the lower surface of the partition 2. The specific location is as follows: Figure 4 As shown, the area where the paraffin 9 is located represents the position of the paraffin layer.

[0055] Furthermore, the lead-acid battery with busbars 1 at both the upper and lower parts has completely different structures at the lower and upper parts of the battery slot. It includes a battery slot 7, a battery upper cover 5, a battery lower cover 4, and a plate arranged in the battery slot 7, and the upper and lower frames of the plate are respectively provided with at least one pole ear; a plurality of single cells connecting the upper and lower ends of the battery slot are arranged inside the battery slot, the upper end of the battery slot 7 is open, and the lower end of the battery slot includes a bottom plate 6, which contains a plurality of openings corresponding to the pole ears; the pole ears of the lower frame of the pole plate pass through the openings at the lower end of the battery slot, and the lower frame of the pole plate contacts the bottom plate 6, the same polarity pole ears at the upper end of the battery slot 7 are connected through the busbar 1, the same polarity pole ears at the lower end of the battery slot 7 are connected through the busbar 1, the same polarity busbars 1 at the upper and lower ends are connected through wires, and a positive pole column and a negative pole column are arranged at the upper end.

[0056] Furthermore, the end surface of the partition is provided with a wax layer area corresponding to the glue-filled area inside the battery cover. This area refers to the area around the busbar 1 on the surface of the partition 2 and / or the area around the battery slot 7 on the surface of the partition 2, with a width of 3 to 5 mm.

[0057] It should be noted that after the battery cover is put on, the glue in the glue groove will generally overflow outward by 2 to 3 mm. Therefore, when the difference between the height of the partition and the depth of the battery groove cavity becomes smaller and smaller, the overflowing epoxy glue may contact the partition. The area corresponding to the glue-added area on the inner side of the battery cover and the end face of the partition is determined by extending 3 to 5 mm outward from the position where the battery cover overlaps with the glue. This is also the location with the paraffin layer, that is, the area around the bus 1 on the surface of the partition 2 and / or the area around the battery groove 7 on the surface of the partition 2, with a width of 3 to 5 mm. This range can mechanically isolate the partition from the epoxy glue.

[0058] Furthermore, the paraffin sheet is made of paraffin with a thickness of 2 mm; wherein the paraffin is any one of microcrystalline paraffin, polyethylene wax, semi-refined paraffin, and chlorinated paraffin. It has good acid and alkali corrosion resistance and good stability, will not affect the function of the partition to absorb acid, and can effectively prevent the partition from contacting the epoxy adhesive. It is solid at room temperature, relatively stable, and has a low melting point, which is easy to shape. The melting point is lower than the melting point of the battery shell, which can ensure that the battery shell will not melt while the paraffin melts.

[0059] Furthermore, the separator refers to the plate between the positive plate and the negative plate of the lead-acid battery, which is rectangular in shape and higher than the positive and negative plates. It is made of ultra-fine glass fiber and has a large number of holes on its surface, which can continuously absorb epoxy glue through capillary phenomenon. After the separator absorbs the glue, it will become solid and can no longer absorb acid, resulting in insufficient acid volume in the battery and insufficient battery capacity.

[0060] It should be noted that in order to increase the capacity of lead-acid batteries, it can be increased by increasing the height and area of ​​the plates. When the plates are raised to a certain height, the partitions between the positive and negative plates must also be raised accordingly, otherwise there will be a risk of short circuit.

[0061] It is worth noting that when the partition is raised to a certain height, it will be closer to the epoxy glue, resulting in the problem of partition adsorbing epoxy glue. On the one hand, after the partition absorbs epoxy glue, there is too little glue in the sealing part, which may cause poor sealing. On the other hand, after the partition absorbs epoxy glue and becomes solid, the partition cannot absorb acid, which will lead to insufficient acid volume in the battery and insufficient battery capacity. Therefore, the utility model is provided with a paraffin layer area corresponding to the glue-filling area on the inner side of the battery cover on the end face of the partition of the lead-acid battery. The paraffin layer can effectively isolate the partition from contact with the epoxy glue and play a role in protecting the partition. In this way, the partition can be raised to the maximum height, and the partition will not absorb acid, thereby increasing the battery capacity.

[0062] Furthermore, the battery slot is a plastic shell made of ABS material, with multiple cells in the middle, each cell can hold a pole group, the upper end of the battery slot is open, and the upper and / or lower ends are equipped with battery covers.

[0063] Specifically, ABS plastic is a high-strength modified polystyrene, with the following main advantages: high mechanical strength, strong impact resistance, high surface hardness. Generally, it can withstand heat up to 90°C and low temperature up to -40°C, has a low shrinkage rate (0.4% to 0.7%) and is stable, and can be used to produce products with high precision, making it the preferred material for battery trays.

[0064] Furthermore, the battery cover refers to the upper battery cover and / or the lower battery cover, and a glue groove is provided inside. After glue is added into the glue groove, the battery can be sealed. The specific glue adding position of the upper cover is as follows: Figure 5 As shown in the figure, the area where the sealant 8 is located represents the glue adding area; the specific glue adding position of the lower cover is as follows Figure 6 As shown, the area where the sealant 8 is located represents the glue adding area.

[0065] The sealant commonly used is epoxy resin, which is a thermosetting resin with excellent mechanical properties, bonding properties and electrical insulation properties. Epoxy resin is a high molecular polymer with a molecular formula of (C 11 H 12 O 3 )n, refers to a general term for a class of polymers containing more than two epoxy groups in the molecule. It is a condensation product of epichlorohydrin and bisphenol A or polyols. Due to the chemical activity of the epoxy group, it can be opened with a variety of compounds containing active hydrogen, cured and cross-linked to form a network structure, so it is a thermosetting resin. Epoxy resin has strong cohesive force and dense molecular structure, so its mechanical properties are higher than general-purpose thermosetting resins such as phenolic resin and unsaturated polyester. The extremely active epoxy groups, hydroxyl groups, and polar groups such as ether bonds, amine bonds, and ester bonds in the epoxy resin curing system give the epoxy cured product extremely high bonding strength. In addition, it has high mechanical properties such as cohesive strength, so it has excellent bonding properties.

[0066] A storage battery of the present utility model is further described below through specific embodiments.

[0067] Embodiment 1:

[0068] Batteries with busbars only on the top:

[0069] A layer of paraffin wax 9 is provided around the busbar 1 and the pole 3 on the upper surface of the partition 2 and around the battery slot 7 on the upper end surface of the partition 2. The width of the paraffin wax 9 is 3 to 5 mm. The specific adding position is as follows: Figure 2 As shown, the paraffin layer 9 can prevent the partition 2 from contacting the sealant 8 by mechanical isolation, and the thickness of the paraffin layer is 0.5-2 mm.

[0070] Other than that, it is the same as traditional lead-acid batteries. Figure 1As shown, the battery tank 7 is composed of a battery cover 5 sealing the upper end of the battery tank, a plurality of pole plates arranged in the battery tank and a partition 2 between the pole plates, a mesh 10 laid on the surface of the partition, a bus 1 and poles 3 on the bus. The battery tank 7 also includes a plurality of single cells in the middle, each of which can hold a pole group, and a battery cover 5 is provided at the upper end; the pole group is composed of pole plates and partitions 2 placed in sequence.

[0071] The battery cover includes a busbar accommodating cavity; a glue groove is provided inside the battery cover 5, and the glue groove is a glue filling area for the sealant 8; the specific glue filling position of the cover is as follows Figure 5 As shown, the area where the sealant 8 is located represents the sealant filling area.

[0072] Comparative Example 1:

[0073] Different from Example 1, there is no paraffin layer.

[0074] Table 1 compares the test results of normal temperature capacity, low temperature capacity and large current of the large-capacity battery with an anti-creeping glue layer of Example 1 and the battery without an anti-creeping glue layer of Comparison 1; the normal temperature capacity test temperature is 25°C, and the low temperature capacity test temperature is -10°C.

[0075]

[0076] Table 1

[0077] It can be seen from Table 1 that the battery of Example 1 shows excellent performance higher than that of the battery of Comparative Example 1 in conventional capacity, low temperature capacity and large current tests. Its normal temperature capacity range is 22-23Ah, with an average value of 22.4Ah; the low temperature capacity range is 18-19Ah, with an average value of 18.3Ah, and the large current average value is 30.0min.

[0078] Figure 7 This is a bar chart comparing the discharge capacities of the batteries of Example 1 and Comparative Example 1, wherein the blue column represents the battery of Comparative Example 1 without an anti-climbing adhesive layer, and the red column represents the high-capacity battery with an anti-climbing adhesive layer manufactured in Example 1. It can be seen from the figure that in the three discharge tests, the discharge capacity of the battery of Example 1 is higher than that of the battery of Comparative Example 1 each time, showing excellent performance.

[0079] Figure 8 This is a comparison chart of the cycle life of two batteries manufactured in Example 1 and Comparative Example 1, in which the blue represents the battery manufactured in Comparative Example 1 without an anti-climbing glue layer, and the yellow represents the large-capacity battery with an anti-climbing glue layer manufactured in Example 1. It can be seen from the figure that through multiple discharge tests, most of the batteries in Example 1 of the utility model have a higher discharge voltage than the batteries in Comparative Example 1, indicating that the battery performance is good.

[0080] Embodiment 2:

[0081] Batteries with busbars on the upper and lower parts:

[0082] There is also a busbar at the bottom of the battery. The structural diagram of the lower part (excluding the lower cover) is as follows: Figure 3 As shown: a bottom plate 6 is arranged in the middle of the lower busbar 1 of the battery.

[0083] Correspondingly, around the busbar 1 on the lower surface of the partition 2, there is a layer of paraffin 9 with a width of 3 to 5 mm. The specific adding position is as follows: Figure 4 As shown, the paraffin wax 9 can prevent the partition 2 from contacting the sealant 8 by mechanical isolation, and the thickness of the paraffin wax layer is 0.5-2 mm.

[0084] Correspondingly, there is a battery lower cover 4, and a glue groove is arranged inside the battery lower cover 4. The glue groove is a glue filling area for the sealant 8. The specific glue filling position of the battery lower cover is as follows: Figure 6 As shown, the area where the sealant 8 is located represents the sealant filling area.

[0085] Other parts are the same as in Example 1.

[0086] Comparative Example 2:

[0087] There is no paraffin layer, and the rest is the same as Example 2.

[0088] Performance Test:

[0089] Table 2 compares the test results of normal temperature capacity, low temperature capacity and large current of the battery with anti-creeping rubber layer on the upper and lower bus bars in Example 2 and the battery without anti-creeping rubber layer on the upper and lower bus bars in Comparison 2; the normal temperature capacity test temperature is 25°C, and the low temperature capacity test temperature is -10°C.

[0090]

[0091] Table 2

[0092] It can be seen from Table 2 that the battery of Example 2 shows excellent performance higher than that of the battery of Comparative Example 2 in conventional capacity, low temperature capacity and large current tests. Its normal temperature capacity range is 24-25Ah, with an average value of 24.7Ah, its low temperature capacity range is 20-21Ah, with an average value of 20.6Ah, and its large current average value is 29.3min.

[0093] Fig. 9This is a bar chart comparing the discharge capacities of the two batteries of Example 2 and Comparative Example 2, wherein the blue column represents the battery of Comparative Example 2 with upper and lower bus bars and no anti-climbing adhesive layer, and the yellow column represents the large-capacity battery of Example 2 with upper and lower bus bars and an anti-climbing adhesive layer. It can be seen from the figure that in the three discharge tests, the discharge capacity of the battery of Example 2 is higher than that of the battery of Comparative Example 2 each time, showing excellent performance.

[0094] Compared with the prior art, the battery provided in this embodiment is provided with a paraffin layer area on the end face of the partition corresponding to the glue-filling area on the inner side of the battery cover, and the paraffin layer can effectively isolate the partition from contacting the epoxy glue. This can not only reduce the difficulty of the operating process at the board wrapping, but also avoid the battery being scrapped due to uneven partitions during board wrapping. It can also reduce the difficulty of the operating process at the glue sealing and improve the efficiency of glue sealing. The battery capacity can also be increased by maximizing the use of the internal space by making the height size of the plate as large as possible. At the same time, it can effectively avoid the defects of poor sealing caused by too little glue after the partition absorbs glue or the inability of the partition to absorb acid after absorbing glue, resulting in insufficient acid volume in the battery and insufficient battery capacity, thereby improving battery performance.

[0095] The above description is only a preferred specific implementation manner 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 storage battery, characterized in that: It includes a battery slot, a battery cover for sealing the end of the battery slot, a plurality of polar plates arranged in the battery slot, a partition between the polar plates, and a busbar; The battery slot includes a plurality of cells disposed in the middle, and a battery cover is provided at the upper end and / or the lower end thereof; The battery cover is provided with a glue groove on the inner side, and the glue groove is a glue filling area; The end surface of the partition is provided with a paraffin layer area corresponding to the glue-filled area on the inner side of the battery cover.

2. The battery according to claim 1, characterized in that: The battery cover includes a busbar accommodating cavity.

3. The battery according to claim 1, characterized in that: The paraffin layer area is larger than the glue-added area; the paraffin layer area includes the epoxy glue overflow area of ​​the glue-added area after the battery cover is sealed; the paraffin layer area forms an anti-climbing glue layer.

4. The battery according to claim 3, characterized in that: After the battery cover is sealed, the epoxy glue overflows from the glue groove to a range of 2 to 3 mm.

5. The battery according to claim 1, characterized in that: The paraffin layer is a paraffin sheet layer.

6. The battery according to claim 1, characterized in that: The thickness of the paraffin layer is 0.5-2 mm.

7. The battery according to claim 1, characterized in that: The paraffin layer area is around the busbar on the end surface of the partition and / or around the battery slot on the end surface of the partition, and has a width of 3 to 5 mm.

8. The battery according to claim 7, characterized in that: The paraffin slices in each area are relatively independently arranged strip-shaped paraffin slices, and the width of the strip-shaped paraffin slices is 3 to 5 mm.

9. The battery according to any one of claims 1 to 8, characterized in that: The battery cover comprises a battery lower cover which seals the lower end of the battery slot, a glue groove is arranged inside the battery lower cover, and the glue groove contains a glue filling area; a paraffin layer area corresponding to the glue filling area inside the battery lower cover is arranged on the lower end surface of the partition.

10. The battery according to claim 9, characterized in that: The wax layer area corresponding to the glue-filled area on the inner side of the battery lower cover is the surrounding area of ​​the busbar and has a width of 3 to 5 mm.

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