CN221928186U - Ultra-low temperature military battery - Google Patents

Abstract

The utility model provides an ultralow-temperature battery cell for the military industry, which comprises a steel shell, a cap, a winding core, an anode material, a cathode material and electrolyte, wherein the steel shell is of an external body structure of the battery cell, the winding core is filled and fixed in the steel shell, the cap is sealed and fixed at the end part of the steel shell and is connected with the winding core in polarity, the anode material is coated on the anode side of the winding core, the cathode material is coated on the cathode side of the winding core, and the electrolyte is low-temperature electrolyte and is filled in the steel shell. The steel shell is a main body external structure of the battery core, is used for defining the appearance specification of the battery core, senses the internal and external environments of the battery core, the cap is a sealing structure of the end part and has the electrode connection function of a battery, the winding core and electrode liquid produce electrochemical reaction, the electrolyte is low-temperature electrolyte which can adapt to low environment temperature, and the low-temperature electrolyte has lower freezing point, low viscosity, excellent ionic conductivity and higher electrochemical stability.

Description

Ultra-low temperature military battery

Technical Field

The utility model relates to an improvement on the structure of an energy storage battery core, in particular to an ultra-low temperature battery core for military use.

Background Art

Battery cells are the main components of electric energy storage devices. They can be combined to form multiple battery cell components that work together to make the energy storage equipment have a larger capacity and better charging and discharging performance. The performance of the battery cells also determines the working range of the energy storage equipment to a certain extent. Conventional battery cells cannot be charged and discharged normally in ultra-low temperature environments because they are not designed for extreme environments, resulting in failure to meet design requirements or even failure to work. Therefore, the battery cell structure needs to be improved.

Utility Model Content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide an ultra-low temperature military battery cell.

The technical solution adopted by the utility model to solve the above problems is: the battery core includes a steel shell, a cap, a winding core, a positive electrode material, a negative electrode material and an electrolyte. The steel shell is the external body structure of the battery core, the steel shell is filled with a fixed winding core, the cap is sealed and fixed at the end of the steel shell, and is connected to the polarity of the winding core, the positive electrode material is coated on the positive side of the winding core, the negative electrode material is coated on the negative side of the winding core, and the electrolyte is a low-temperature electrolyte and is filled in the steel shell. The steel shell is the main external structure of the battery core, which is used to specify the external specifications of the battery core and sense the internal and external environment of the battery core. The cap is a sealing structure at the end and has the function of connecting the electrodes of the battery. The winding core and the electrode liquid produce an electrochemical reaction. The electrolyte is a low-temperature electrolyte that can adapt to low ambient temperatures. The low-temperature electrolyte has a low freezing point, low viscosity, excellent ionic conductivity and high electrochemical stability.

Furthermore, the positive electrode side substrate of the core is aluminum foil, and the negative electrode side substrate is copper foil, the positive electrode side and the negative electrode side are blocked by a diaphragm, the positive electrode material is lithium iron phosphate, and the negative electrode material is graphite, and they are coated on the corresponding substrates respectively. Batteries with lithium iron phosphate as the positive electrode and graphite as the negative electrode have good performance in low temperature environments. The lithium iron phosphate positive electrode material has good electrochemical activity and stability at low temperatures, and can provide higher energy density and cycle life. The graphite negative electrode material has good conductivity and chemical stability, and can maintain good charge and discharge performance at low temperatures.

Furthermore, the winding core is formed by sandwiching a separator between the positive electrode side substrate and the negative electrode side substrate and winding to form a winding structure, the positive electrode material and the negative electrode material form a coating and follow the shape to form a winding shape, and a busbar is connected to the end of the winding core, and the busbar is connected to the winding core in multiple lines. The winding core structure can increase the reaction area, have more complete contact with the electrolyte, and have better working performance in a low temperature environment.

Furthermore, the cap has a positive terminal of the battery core, which is connected to the busbar through a flexible material. The busbar is a multi-point multi-line connection, which can increase the current between the winding core and the busbar, reduce the internal resistance of the battery, and improve the working stability in a low temperature environment.

Furthermore, the electrolyte is a low-temperature lithium-ion electrolyte, which fills the environment in the steel shell and contacts the polar material on the winding core. The electrolyte is a low-temperature lithium-ion electrolyte, which has low viscosity, good fluidity, strong electronic activity at low temperature, and is not prone to side reactions.

Compared with the prior art, the utility model has the following advantages and effects: the design is a battery cell that can work normally in an ultra-low temperature environment, the battery cell can be used as the original component of an energy storage device, and can store energy normally in an outdoor low-temperature environment. It has good environmental applicability and is suitable for placing energy storage devices in severe cold environments, providing more scenarios for stable operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the cross-sectional structure of a battery cell.

FIG. 2 is a schematic diagram of the appearance structure of a battery cell.

In the figure: 1. steel shell, 2. cover cap, 3. winding core, 4. busbar, 5. flexible material.

DETAILED DESCRIPTION

The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

A super-low temperature military battery cell, the battery cell comprising a steel shell 1, a cap 2, a winding core 3, a positive electrode material, a negative electrode material and an electrolyte. The steel shell 1 is the external body structure of the battery cell, the winding core 3 is filled and fixed in the steel shell 1, the cap 2 is sealed and fixed at the end of the steel shell 1, and is connected to the polarity of the winding core 3. The positive electrode material is coated on the positive electrode side of the winding core 3, and the negative electrode material is coated on the negative electrode side of the winding core 3. The electrolyte is a low-temperature electrolyte and is filled in the steel shell 1.

The positive electrode side substrate of the winding core 3 is aluminum foil, and the negative electrode side substrate is copper foil. The positive electrode side and the negative electrode side are blocked by a separator. The positive electrode material is lithium iron phosphate, and the negative electrode material is graphite, which are coated on the corresponding substrates respectively.

The winding core 3 is a winding structure formed by sandwiching a separator between the positive electrode side substrate and the negative electrode side substrate and winding them. The positive electrode material and the negative electrode material form a coating and follow the shape to form a winding shape. A busbar 4 is connected to the end of the winding core 3, and the busbar 4 is connected to the winding core 3 in multiple lines.

The cap 2 has a positive terminal of the battery cell, which is connected to the busbar 4 through a flexible material 5 .

The electrolyte is a low-temperature lithium ion electrolyte, which fills the environment inside the steel shell 1 and contacts the polar material on the winding core 3 .

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary rather than restrictive. The scope of the present invention is defined by the claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim involved.

In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims (5)

1. An ultra-low temperature electrical core for military industry is characterized in that: the battery cell comprises a steel shell (1), a cover cap (2), a winding core (3), an anode material, a cathode material and electrolyte, wherein the steel shell (1) is of an external body structure of the battery cell, the steel shell (1) is filled with the fixed winding core (3), the cover cap (2) is sealed and fixed at the end part of the steel shell (1) and is connected with the winding core (3) in polarity, the anode material is coated on the anode side of the winding core (3), the cathode material is coated on the cathode side of the winding core (3), and the electrolyte is low-temperature electrolyte and is filled in the steel shell (1).

2. The ultra-low temperature military electrical core of claim 1, wherein: the positive electrode side substrate of the winding core (3) is aluminum foil, the negative electrode side substrate is copper foil, the positive electrode side and the negative electrode side are blocked by a diaphragm, the positive electrode material is lithium iron phosphate, and the negative electrode material is graphite and is respectively coated on the corresponding substrates.

3. The ultra-low temperature military electrical core of claim 2, wherein: the winding core (3) is formed by winding a separator between a positive electrode side substrate and a negative electrode side substrate to form a winding drum structure, the positive electrode material and the negative electrode material form a coating and form a winding form along with each other, the end part of the winding core (3) is connected with a confluence disc (4), and the confluence disc (4) is connected with the winding core (3) in a multi-line mode.

4. The ultra-low temperature military electrical core of claim 3, wherein: the cap (2) has a positive end of the cell, which is connected to the busbar (4) by means of a flexible material (5).

5. The ultra-low temperature military electrical core of claim 1, wherein: the electrolyte is low-temperature lithium ion electrolyte, and is filled in the steel shell (1) and is in contact with the polar material on the winding core (3).