Thermal battery capable of prolonging working time

Abstract

The invention discloses a thermal battery capable of prolonging working time in the technical field of thermal batteries, and the thermal battery comprises a plurality of unit thermal batteries and a plurality of control systems, the unit thermal batteries and the control systems are in one-to-one correspondence, each control system comprises a board card, a voltage acquisition module, a voltage stabilization module, a comparison module and an activation module, and each module component is installed on the board card; the board card is horizontally and fixedly mounted above the thermal battery; the voltage acquisition module, the voltage stabilization module and the activation module are all in electric signal connection with the battery body, the voltage acquisition module is used for acquiring the voltage of the unit thermal battery, the voltage stabilization module is used for generating a stable voltage reference source, and the comparison module is used for comparing the partial voltage value of the thermal battery with the reference voltage in real time; and the activation module is used for activating the second unit thermal battery when the voltage acquisition module acquires that the previous unit thermal battery works to be close to the voltage lower limit. According to the scheme, the problem of short service life of the existing thermal battery is solved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal batteries, and in particular to a thermal battery with extended working time. Background Art

[0002] Thermal batteries are a special type of battery designed to work in high-temperature environments. They are usually used in the military, aerospace and industrial fields. Thermal batteries are characterized by their ability to quickly activate and provide high power output at extremely high temperatures. At the same time, thermal batteries are currently the main power source for weapons and equipment because of their long storage life and maintenance-free characteristics. With the development of weapons and equipment, the demand for long-flight electrical energy is increasing. The difference between thermal batteries and other primary chemical power sources is that thermal batteries work by heat. Once activated and start working, they cannot be paused until the internal heat or capacity is fully released and the battery fails. Therefore, the working life of thermal batteries is generally not long.

[0003] In order to extend the working life of thermal batteries, a variety of measures have been taken, mainly including the modification of heating materials, the use of high-efficiency thermal insulation materials and vacuum cylinders, etc., which have achieved certain results and extended the working life of thermal batteries from tens of seconds to hundreds of seconds to more than 1 hour. However, at present, domestic thermal batteries generally do not exceed 2 hours, and long-term working thermal batteries are also limited by the size of the unit thermal battery and the size of the working current density. The unit thermal battery is too small and the heat dissipation is too fast, so it cannot work for a long time; the working current density is large, the polarization internal resistance is large, resulting in a fast voltage drop, and it is also impossible to work for a long time. At present, the current density of thermal batteries with a working time of more than 1 hour is not more than 100mA / cm 2 . Summary of the invention

[0004] The present invention aims to provide a thermal battery with extended working time to solve the problem of short working life of existing thermal batteries.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a thermal battery with extended working time, comprising a plurality of unit thermal batteries and a plurality of control systems, wherein the unit thermal batteries and the control systems correspond to each other one by one, and the control system is arranged on the upper surface of the battery cover or the upper surface of the cover plate of the unit thermal battery, and the control system comprises a board, a voltage acquisition module, a voltage stabilization module, a comparison module and an activation module, and the module components are all installed on the board;

[0006] The board is horizontally fixedly installed above the unit thermal battery and fixed on the upper surface of the battery cover of the unit thermal battery. The pole of the unit thermal battery passes through the board and is welded and fixed to the board; or the board is fixed to the upper surface of the cover of the unit thermal battery, and an insulating glue layer is provided between the bottom of the cover and the battery cover of the unit thermal battery. The signal connection between the board and the thermal battery is realized through a cable.

[0007] Furthermore, the voltage collection module is connected to the electrical signals of the positive and negative power poles of the unit thermal battery, and the voltage collection module is used to collect the voltage of the unit thermal battery.

[0008] Furthermore, the voltage stabilizing module is connected to the electrical signals of the positive and negative poles of the unit thermal battery power, and the voltage stabilizing module is used to generate a stable voltage reference source.

[0009] Furthermore, the comparison module is used to compare the voltage division value of the thermal battery with the reference voltage V generated by the real-time output of the voltage stabilizing module power supply in real time. ref When the battery voltage is lower than the reference voltage, a signal is output to the activation module.

[0010] Furthermore, the activation module is connected to the positive and negative power poles of the unit thermal battery. The activation module is used to activate the unit thermal battery when the voltage drop is lower than V ref When , the comparator outputs a high level, the high level turns on the MOS tube on the board, closes the relay, and the unit thermal battery outputs an activation signal to activate the next unit thermal battery.

[0011] Furthermore, two or more unit thermal batteries are provided. During use, the activation control module output electrical signal point of the previous unit thermal battery is connected to the activation positive and negative pole electrical signal connection points of the next unit thermal battery, thereby realizing the working relay of the thermal battery.

[0012] Furthermore, when multiple unit thermal batteries are connected, they are arranged head to tail, in a dot matrix or in a special shape.

[0013] Beneficial effects of the present invention:

[0014] 1. In this scheme, when the unit thermal battery is working close to the lower limit of voltage, the activation module in the control system activates the next connected unit thermal battery, and repeats this process to realize the relay operation of two or more unit thermal batteries, so that long-term operation can be achieved, which greatly increases the working life of the thermal battery.

[0015] 2. When the unit thermal battery is small in size and the upper surface temperature of the battery cover is lower than 100°C during operation, the control system is set on the upper surface of the battery cover of the unit thermal battery, so as to protect the components of the control system from damage. If the unit thermal battery is large in size and the upper surface temperature of the battery cover is higher than 100°C during the working time of the unit thermal battery, this setting allows the control system to be located on the upper surface of the cover of the unit thermal battery and fixed by screws, thereby preventing the high temperature of the unit thermal battery from damaging the components of the control system.

[0016] 3. Each unit thermal battery and control system is an independent module, which is convenient for individual maintenance and upgrade. If a unit thermal battery or control system fails, it can be replaced separately without affecting the operation of the entire system.

[0017] 4. The activation module in the control system can accurately activate the next unit when the previous unit battery is close to the lower voltage limit based on the feedback from the voltage acquisition module, ensuring efficient use of the battery, avoiding unnecessary energy waste, and improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a thermal battery embodiment 1 for extending the working time of the present invention;

[0019] Figure 2 for Figure 1 A cross-sectional view of the top view;

[0020] Figure 3 This is a schematic structural diagram of a thermal battery embodiment 2 for extending the working time of the present invention;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure from a top view;

[0022] Figure 5 A schematic diagram of a relay operation mode of two or more unit thermal batteries;

[0023] Figure 6 A top view of two or more unit thermal batteries in relay working mode;

[0024] Figure 7 This is a working principle diagram of a thermal battery with extended working time according to the present invention. DETAILED DESCRIPTION

[0025] The following is further described in detail through specific implementation methods:

[0026] The figure marks in the drawings of the specification include: battery body 1, battery cover 2, pole 3, board 4, battery shell 5, cover 6, voltage acquisition module 7, voltage stabilization module 8, comparison module 9, activation module 10, cable 11, and insulating rubber layer 12.

[0027] Embodiment 1 is basically as attached Figure 1 , Attachment Figure 2 , Attachment Figure 5 , Attachment Figure 6 and attached Figure 7 As shown:

[0028] A thermal battery with extended working time includes multiple unit thermal batteries and multiple control systems, the unit thermal batteries and the control systems correspond to each other one by one, the unit thermal battery includes a battery body 1, the battery body 1 is fixedly installed in a battery shell 5, a battery cover 2 is fixedly installed on the top of the battery body 1, a cover plate 6 is fixedly connected to the top of the battery shell 5, the control system is arranged on the upper surface of the battery cover 2, and the control system includes a board 4 and a voltage acquisition module 7, a voltage stabilization module 8, a comparison module 9, an activation module 10 and other components for operating the control system on the board 4.

[0029] The board card 4 is horizontally fixedly mounted on the upper surface of the battery cover 2, the top end of the pole 3 of the unit thermal battery vertically passes through the board card 4 and is located above the board card 4, and the pole 3 of the unit thermal battery is welded and fixed to the board card 4 and electrically connected.

[0030] When multiple unit thermal batteries work in relay, the activation signal output positive a and the activation signal output negative b of the first battery are connected to the activation positive and negative pole electrical signal connection points of the second battery respectively.

[0031] The control system is connected to the electrical signal of the unit thermal battery, the voltage acquisition module 7 is connected to the electrical signal of the positive and negative poles of the battery power, and the voltage acquisition module 7 is used to collect the voltage of the unit thermal battery.

[0032] The voltage stabilizing module 8 is connected to the positive and negative poles of the unit thermal battery power electrical signal, and the voltage stabilizing module 8 is used to generate a stable voltage reference source.

[0033] The comparison module 9 is used to compare the thermal battery voltage value with the reference voltage V generated by the real-time output of the voltage stabilization module 8 power supply in real time. ref When the battery voltage is lower than the reference voltage, a signal is output to the activation module 10.

[0034] The activation module 10 is connected to the positive and negative power poles of the unit thermal battery. The activation module 10 is used to activate the unit thermal battery when the voltage drop is lower than V ref When , the comparator outputs a high level, the high level turns on the MOS tube D1 on the board 4, the relay K1 closes, and the unit thermal battery outputs an activation signal to activate the next unit thermal battery.

[0035] The voltage acquisition module 7 , the voltage stabilization module 8 , the comparison module 9 , the activation module 10 , the MOS tube D1 , the relay K1 and other components are all installed on the board 4 .

[0036] The specific implementation process is as follows:

[0037] When in use, multiple unit thermal batteries are connected and arranged head to tail, in a dot matrix or in a special shape. The positive and negative electrical performance of the power of the unit thermal battery is output, part of which is output to the user for power supply, and part of which is output to the next unit thermal battery through the control system, after passing through the voltage acquisition module 7, the voltage stabilization module 8, the comparison module 9, and the activation module 10. The voltage acquisition module 7 is used to collect the voltage of the unit thermal battery. When the unit thermal battery is activated, the DC / DC fixed delay start time is adjusted to make its start time greater than the unit thermal battery activation time by adjusting the circuit. The unit thermal battery supplies power to the comparison module 9 and the relay K1 coil of the control system; the voltage stabilization module 8 outputs in real time to generate a reference voltage V ref ; Use comparison module 9 to compare the unit thermal battery voltage value with V ref When the unit thermal battery voltage is higher than V ref When the voltage of the unit thermal battery is lower than V ref When , the comparison module 9 outputs a high level, the high level turns on the MOS tube D1, closes the relay K1, and the unit thermal battery outputs an activation signal to activate the next unit thermal battery.

[0038] Example 2

[0039] The difference between Example 2 and Example 1 is as shown in the attached Figure 3 and attached Figure 4 As shown: the board 4 is fixed on the upper surface of the cover plate 6 of the unit thermal battery, an insulating glue layer 12 is provided between the lower part of the cover plate 6 and the battery cover 2 of the unit thermal battery, and the signal connection between the board 4 and the thermal battery is realized through a cable 11.

Claims

1. A thermal battery with extended working time, characterized in that: It includes a plurality of unit thermal batteries and a plurality of control systems, wherein the unit thermal batteries and the control systems correspond to each other one by one, and the control system is arranged on the upper surface of the battery cover or the upper surface of the cover plate of the unit thermal battery, and the control system includes a board, a voltage acquisition module, a voltage stabilization module, a comparison module and an activation module, and the module components are all installed on the board; The board is horizontally fixedly installed above the unit thermal battery and fixed on the upper surface of the battery cover of the unit thermal battery. The pole of the unit thermal battery passes through the board and is welded and fixed to the board; Or the board is fixed on the upper surface of the cover of the unit thermal battery, an insulating glue layer is provided between the lower part of the cover and the battery cover of the unit thermal battery, and the signal connection between the board and the thermal battery is realized through a cable.

2. A thermal battery with extended working time according to claim 1, characterized in that: The voltage collection module is connected to the electrical signals of the positive and negative power poles of the unit thermal battery, and the voltage collection module is used to collect the voltage of the unit thermal battery.

3. A thermal battery with extended working time according to claim 2, characterized in that: The voltage stabilizing module is connected to the positive and negative poles of the unit thermal battery power electrical signal, and the voltage stabilizing module is used to generate a stable voltage reference source.

4. A thermal battery with extended working time according to claim 3, characterized in that: The comparison module is used to compare the thermal battery voltage division value with the reference voltage V generated by the real-time output of the voltage stabilization module power supply in real time. ref When the battery voltage is lower than the reference voltage, a signal is output to the activation module.

5. A thermal battery with extended working time according to claim 4, characterized in that: The activation module is connected to the positive and negative power poles of the unit thermal battery by electrical signals. The activation module is used to activate the unit thermal battery when the voltage drop is lower than V ref When , the comparator outputs a high level, the high level turns on the MOS tube on the board, closes the relay, and the unit thermal battery outputs an activation signal to activate the next unit thermal battery.

6. A thermal battery with extended working time according to claim 5, characterized in that: There are two or more unit thermal batteries. During use, the activation control module of the previous unit thermal battery outputs an electrical signal point to connect the activation positive and negative pole electrical signal connection points of the next unit thermal battery, thereby realizing the working relay of the thermal battery.

7. A thermal battery with extended working time according to claim 6, characterized in that: When multiple unit thermal batteries are connected, head-to-tail arrangement, lattice arrangement or special-shaped arrangement is adopted.

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