A high temperature resistant battery

Abstract

The utility model discloses a kind of high-temperature-resistant batteries, including positive plate, negative plate and the composite separator being set between positive, negative plate, it is characterized in that, the composite separator includes a group of PE separator, two groups of glass fiber separators and two groups of AGM separators, the utility model is placed in the two ends of composite separator by AGM separator with excellent liquid absorption, there is enough electrolyte around pole plate under the different working conditions of battery, glass fiber separator auxiliary electrolyte distribution, when cooperating with AGM separator, glass fiber separator can assist AGM separator to better adjust the distribution of electrolyte, prevent electrolyte excessive gathering or dry in local area, PE separator is placed in the middle, using its good barrier property, so that electrolyte maintains relatively stable distribution state inside battery, reduce acid stratification phenomenon, improve the service life and performance stability of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a high-temperature resistant battery. Background Technology

[0002] With increasingly stringent national regulations on vehicle emissions, incomplete combustion of fuel during vehicle startup is the primary cause of this problem. Furthermore, batteries require the ability to withstand high temperatures. The current climate is characterized by persistently high temperatures, and commercial vehicles already using such products experience rapid grid growth due to these high temperatures, leading to short circuits and significantly reducing battery life. Therefore, a high-temperature resistant battery is urgently needed to address this issue. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0004] A high-temperature resistant battery includes a positive electrode plate, a negative electrode plate, and a composite separator disposed between the positive and negative electrode plates. The composite separator includes a set of PE separators, two sets of glass fiber separators, and two sets of AGM separators. Glass fiber separators and AGM separators are arranged sequentially from the inside to the outside on both sides of the PE separator.

[0005] In the above technical solution, the AGM separator has excellent liquid absorption properties. Placing it at both ends of the composite separator can fully utilize this characteristic. During battery operation, the AGM separator can absorb and store a large amount of electrolyte like a sponge, providing a stable electrolyte supply inside the battery. This helps to maintain sufficient electrolyte around the plates under different battery operating states (such as charging, discharging, and resting), ensuring the smooth progress of the battery reaction. The glass fiber separator assists in electrolyte distribution. The glass fiber separator in the middle also has a certain liquid absorption capacity. Its porous structure allows the electrolyte to be evenly distributed inside the separator. When used in conjunction with the AGM separator, the glass fiber separator can help the AGM separator better regulate the distribution of electrolyte, preventing excessive accumulation or drying of electrolyte in local areas, thereby optimizing the distribution of electrolyte between the entire battery plates and improving the consistency of battery performance. The PE separator is placed in the middle, and its good barrier properties can limit the excessive flow of electrolyte inside the battery. It prevents rapid and uneven flow of the electrolyte under the influence of gravity or changes in internal battery pressure, ensuring a relatively stable electrolyte distribution within the battery. This reduces acid stratification, improves battery life and performance stability, and during high-current charging and discharging, a stable electrolyte distribution helps ions conduct evenly between the plates, avoiding excessively high or low local ion concentrations, thus reducing ohmic voltage drop and enabling the battery to better adapt to the demands of high-current charging and discharging. Simultaneously, the five-layer composite separator effectively reduces the internal resistance and cost compared to simple glass fiber composites. In high-temperature environments, the activity of the battery plates increases, making them more prone to deformation and active material shedding. The five-layer composite separator increases the pressure between the electrode groups, fixes the active material, and eliminates the risk of short circuits caused by moss.

[0006] As an improvement to the above technical solution, the thickness of the AGM partition is 0.4 mm, and the thickness of the glass fiber partition is 0.3 mm.

[0007] In the above technical solution, the 0.3mm glass fiber separator and the 0.4mm AGM separator can fix the plates and maintain their stability, enabling the battery to withstand more charge and discharge cycles. The microporous structure of the PE separator 3 reduces the risk of dendrite short circuits.

[0008] As an improvement to the above technical solution, the PE partition has a thickness of 0.2-0.3 mm, a porosity of 60%-80%, and a pore size of 1-5 μm.

[0009] As an improvement to the above technical solution, the PE partition and the glass fiber partition, as well as the glass fiber partition and the AGM partition, are all bonded together with water-soluble adhesive.

[0010] The beneficial effects of this utility model are:

[0011] AGM separators have excellent liquid absorption properties. When placed at both ends of the composite separator, they maintain sufficient electrolyte around the plates under different battery operating states (such as charging, discharging, and resting), ensuring smooth battery reactions. Glass fiber separators assist in electrolyte distribution. When used in conjunction with AGM separators, glass fiber separators help AGM separators better regulate electrolyte distribution, preventing excessive accumulation or drying of electrolyte in local areas. PE separators are placed in the middle, utilizing their good barrier properties to maintain a relatively stable electrolyte distribution inside the battery, reducing acid stratification and improving battery life and performance stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model. Reference numerals: 1. AGM partition; 2. Fiberglass partition; 3. PE partition. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] A high-temperature resistant battery includes a positive electrode plate, a negative electrode plate, and a composite separator disposed between the positive and negative electrode plates. The composite separator includes a set of PE separators 3, two sets of glass fiber separators 2, and two sets of AGM separators 1. Glass fiber separators 2 and AGM separators 1 are arranged sequentially from the inside to the outside on both sides of the PE separator 3.

[0015] AGM separator 1 possesses excellent liquid absorption properties. Placing it at both ends of the composite separator fully utilizes this characteristic. During battery operation, the AGM separator acts like a sponge, absorbing and storing a large amount of electrolyte, providing a stable electrolyte supply within the battery. This helps maintain sufficient electrolyte around the plates under different battery operating states (such as charging, discharging, and resting), ensuring smooth battery reactions. Glass fiber separator 2 assists in electrolyte distribution. Located in the middle, glass fiber separator 2 also has a certain liquid absorption capacity. Its porous structure allows for uniform electrolyte distribution within the separator. When used in conjunction with AGM separator 1, the glass fiber separator helps the AGM separator better regulate electrolyte distribution, preventing excessive accumulation or drying of electrolyte in localized areas. This optimizes electrolyte distribution across the entire battery plate, improving battery performance consistency. The separator, placed in the middle, utilizes its excellent barrier properties to prevent rapid, uneven flow of the electrolyte under the influence of gravity or changes in internal battery pressure. This ensures a relatively stable electrolyte distribution within the battery, reducing acid stratification and improving battery lifespan and performance stability. During high-current charging and discharging, a stable electrolyte distribution helps ions conduct evenly between the plates, preventing excessively high or low local ion concentrations, thus reducing ohmic voltage drop and enabling the battery to better adapt to the demands of high-current charging and discharging. Simultaneously, the five-layer composite separator effectively reduces the internal resistance and cost compared to simple glass fiber composite separators. In high-temperature environments, the activity of the battery plates increases, making them more prone to deformation and active material shedding. The five-layer composite separator increases the pressure between the electrode groups, fixes the active material, and eliminates the risk of short circuits caused by moss.

[0016] In one embodiment, the thickness of the AGM partition 1 is 0.4 mm, the thickness of the glass fiber partition 2 is 0.3 mm, the thickness of the PE partition 3 is 0.2-0.3 mm, and the porosity of the PE partition 3 is 60%-80%, with a pore size of 1-5 μm.

[0017] The 0.3mm glass fiber separator 2 and the 0.4mm AGM separator 1 can fix the plates and maintain their stability, allowing the battery to withstand more charge and discharge cycles. The microporous structure of the PE separator 3 reduces the risk of dendrite short circuits.

[0018] In one embodiment, the PE separator 3 and the glass fiber separator 2, as well as the glass fiber separator 2 and the AGM separator 1, are bonded together using a water-soluble adhesive. After contacting the electrolyte, the water-soluble adhesive can better adapt to the electrolyte environment because it has a certain degree of hydrophilicity and will not react adversely with the electrolyte like some non-hydrophilic adhesives. This can ensure the stability of the chemical environment inside the battery, which is conducive to the normal operation and performance of the battery.

[0019] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A high-temperature resistant battery, characterized in that, It includes a positive electrode plate, a negative electrode plate, and a composite separator disposed between the positive and negative electrode plates. The composite separator includes a set of PE separators (3), two sets of glass fiber separators (2) and two sets of AGM separators (1). The two sides of the PE separator (3) are provided with glass fiber separators (2) and AGM separators (1) from the inside to the outside.

2. The high-temperature resistant battery according to claim 1, characterized in that: The thickness of the AGM partition (1) is 0.4 mm, and the thickness of the glass fiber partition (2) is 0.3 mm.

3. A high-temperature resistant battery according to claim 1, characterized in that: The PE partition (3) has a thickness of 0.2-0.3 mm, a porosity of 60%-80%, and a pore size of 1-5 μm.

4. A high-temperature resistant battery according to claim 1, characterized in that: The PE partition (3) and the glass fiber partition (2), as well as the glass fiber partition (2) and the AGM partition (1), are all bonded together with water-soluble adhesive.

Images