Working temperature self-adjusting composite battery suitable for wide environment working condition and use method thereof

Abstract

The invention discloses a working temperature self-adjusting composite battery suitable for a wide environment working condition and a using method thereof.The working temperature self-adjusting composite battery comprises a power / energy storage battery and a thermoelectric battery, the thermoelectric battery is bonded to the outer side of the power / energy storage battery, and the power / energy storage battery is provided with multiple sets of monitoring points; the system further comprises a control sensor electrically connected with the monitoring points, and the control sensor is connected with and controls charging and discharging of the thermoelectric battery. Compared with the prior art, the working temperature self-adjusting composite battery suitable for the wide environment working condition and the use method of the working temperature self-adjusting composite battery have the advantages that heat and temperature self-adjusting can be achieved in a wide environment temperature area so that high-performance electric energy output can be ensured, small-impedance large-multiplying-power rapid charging is supported, and immediate charging and immediate use are achieved. The working temperature self-adjusting composite battery suitable for the wide environment working condition and the use method of the working temperature self-adjusting composite battery are provided.

Description

Technical Field

[0001] The present invention relates to the technical field of composite wide-environmental-condition batteries, and in particular to a composite battery with self-regulating working temperature suitable for wide-environmental conditions and a method for using the same. Background Art

[0002] Clean and environmentally friendly power / energy storage battery technology has promoted the rapid development of the new energy industry, but the problem that battery performance is highly sensitive to temperature during discharge has not been effectively improved. Low temperature environment reduces the electrochemical reaction speed and attenuates battery capacity, while high temperature accelerates the aging of electrolyte and electrode materials, induces side reactions and even explosions, resulting in performance differences of power / energy storage batteries under a wide range of environmental conditions.

[0003] Taking the classic lithium battery as an example, the industry generally recognizes that the best operating temperature range is 15℃~35℃. This means that a high-performance power / energy storage battery technology that can be applied to a wide range of regions still has a blind spot in temperature control.

[0004] Therefore, there is still a lack of high-performance battery technology that can self-regulate heat to adapt to a wide range of ambient temperature ranges. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the current power / energy storage batteries cannot achieve temperature self-regulation in a wide ambient temperature range to ensure high performance output. The present invention provides a composite battery with self-regulating working temperature suitable for a wide range of environmental conditions and a method of using the same.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a composite battery with self-regulating working temperature suitable for a wide range of environmental conditions and a method of using the same, comprising a power / energy storage battery and a thermoelectric battery, wherein the thermoelectric battery is bonded to the outside of the power / energy storage battery, and the power / energy storage battery is provided with multiple groups of monitoring points for monitoring the charging and discharging state and temperature of the power / energy storage battery, and also comprises a control sensor electrically connected to the monitoring points, and the control sensor is connected to control the charging and discharging of the thermoelectric battery.

[0007] Preferably, the power / energy storage battery includes any one of a lithium-ion battery, a nickel-hydrogen battery, a lead-acid battery, a solid-state battery, a fluid battery (liquid flow battery), and a sodium-ion battery.

[0008] Preferably, the temperature difference battery and the power / energy storage battery are bonded by thermally conductive silicone.

[0009] Preferably, a redox couple is provided in the thermoelectric battery.

[0010] When the temperature coefficient of the thermoelectric battery is negative, it is an entropy increase reaction during charging, absorbing heat from the outside world, and it is an entropy decrease reaction during discharging, releasing heat to the outside world.

[0011] When the temperature coefficient of the thermoelectric battery is positive, it is an entropy reduction reaction during charging, releasing heat to the outside world, and it is an entropy increase reaction during discharging, absorbing heat from the outside world.

[0012] Preferably, when the monitoring point monitors the discharging working state of the power / energy storage battery, in any environment, when it is detected that the temperature of the power / energy storage battery is too high during the discharge process, the sensor receives a signal to control the thermoelectric battery with a negative (positive) temperature coefficient to start charging (discharging), and uses the entropy increase brought about by the redox reaction of the large temperature coefficient inside the thermoelectric battery to absorb the heat of the power / energy storage battery and cool it down. At the same time, the voltage of the thermoelectric battery decreases (increases) to achieve low-voltage charging (high-voltage discharging); when it is detected that the temperature of the power / energy storage battery is too low, especially when the electrolyte is frozen and the power / energy storage battery cannot work, the sensor receives a signal to control the thermoelectric battery with a negative (positive) temperature coefficient to start discharging (charging), and uses the entropy reduction brought about by the redox reaction to release heat and preheat the power / energy storage battery, so that the temperature of the power / energy storage battery rises, and the normal transmission of electric energy is started. At the same time, the voltage of the thermoelectric battery increases (decreases) to achieve high-voltage discharge (low-voltage charging).

[0013] Preferably, when the monitoring point detects the charging state of the power / energy storage battery, the monitoring point returns the power / energy storage battery temperature signal to the sensor, and the sensor determines the difference between the temperature and the high temperature requirement to be achieved. If it is less than the high temperature requirement, the negative (positive) temperature coefficient thermoelectric battery is driven to discharge (charge), release heat to the power / energy storage battery, make it enter a high temperature, and start fast charging in a low impedance state; if it is higher than the high temperature requirement, the negative (positive) temperature coefficient thermoelectric battery is driven to charge (discharge), absorb the heat of the power / energy storage battery, cool it down to a reasonable high temperature, and start charging.

[0014] The advantages of the present invention compared with the prior art are:

[0015] 1. Under wide environmental conditions, the power / energy storage battery always works and discharges at the highest performance in the ideal temperature range. Such a composite battery easily broadens its use environment without changing the material and physical properties of the power / energy storage battery itself, which is conducive to further promotion;

[0016] 2. The addition of temperature difference batteries can achieve additional power output based on the cold and heat of power / energy storage batteries, realize waste heat utilization, and improve the overall power generation efficiency;

[0017] 3. When the power / energy storage battery is charging, the temperature difference battery brings a high temperature environment, which reduces the impedance of the power / energy storage battery and accelerates the electrochemical reaction, thereby supporting high-rate fast charging and achieving immediate charging and use;

[0018] 4. The present invention can realize adaptive temperature regulation by adding a sensor;

[0019] 5. The temperature difference battery regulates the temperature of the power / energy storage battery to avoid the reduction of life and performance degradation caused by extreme environments, and effectively protects the power / energy storage battery;

[0020] 6. The present invention has a simple structure, low cost for technical improvement, simple implementation conditions, and is suitable for temperature environments at any latitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram is a structural diagram of a composite battery with self-regulating working temperature suitable for a wide range of environmental conditions.

[0022] As shown in the figure: 1. Power / energy storage battery, 2. Temperature difference battery, 3. Monitoring point, 4. Control sensor. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] Combined with Figure 1 As shown, a composite battery with self-regulating working temperature suitable for wide environmental conditions and a method of using the same, comprises a power / energy storage battery 1 and a thermoelectric battery 2, wherein the thermoelectric battery 2 is bonded to the outside of the power / energy storage battery 1. More specifically, no matter the power / energy storage battery is in the shape of a soft-pack battery, a cylindrical battery, a square battery, etc., the thermoelectric battery is wrapped around the outside of the power / energy storage battery, and the two are bonded with thermally conductive silicone.

[0025] The power / energy storage battery includes any one of a lithium-ion battery, a nickel-hydrogen battery, a lead-acid battery, a solid-state battery, a fluid battery (liquid flow battery), and a sodium-ion battery.

[0026] The power / energy storage battery is provided with a plurality of monitoring points 3, and also includes a control sensor 4 electrically connected to the monitoring points, and the control sensor is connected to control the charging and discharging of the temperature difference battery.

[0027] When the monitoring point detects the discharging working state of the power / energy storage battery, the temperature signal is fed back to the sensor, and the charging and discharging as well as the heat absorption and release of the temperature difference battery are controlled in combination with the wires, so as to realize the heat self-management and temperature self-regulation of the composite battery, thereby expanding the working environment conditions.

[0028] When the monitoring point detects the charging status of the power / energy storage battery, the high temperature demand is fed back to the sensor, combined with the existing temperature signal of the power / energy storage battery, and then the temperature difference battery charging and discharging and heat absorption and release are controlled through the wire, providing the power / energy storage battery with a high temperature environment, supporting its low impedance and high rate fast charging, and realizing charge and use.

[0029] A redox couple is provided in the thermoelectric cell;

[0030] When the temperature coefficient of a thermoelectric battery is negative, it is an entropy increase reaction during charging, absorbing heat from the outside, and it is an entropy reduction reaction during discharge, releasing heat to the outside;

[0031] When the temperature system is a positive temperature difference battery, it is an entropy reduction reaction during charging, releasing heat to the outside world, and it is an entropy increase reaction during discharging, absorbing heat from the outside world.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] When the monitoring point detects the power / energy storage battery discharging working state:

[0034] In any environment, when it is detected that the temperature of the power / energy storage battery is too high during the discharge process, the sensor receives a signal to control the thermoelectric battery with a negative (positive) temperature coefficient to start charging (discharging), and uses the entropy increase brought about by the redox reaction of the large temperature coefficient inside the thermoelectric battery to absorb the heat of the power / energy storage battery and cool it down. At the same time, the voltage of the thermoelectric battery decreases (increases) to achieve low-voltage charging (high-voltage discharging); when it is detected that the temperature of the power / energy storage battery is too low, especially when the electrolyte is frozen and the power / energy storage battery cannot work, the sensor receives a signal to control the thermoelectric battery with a negative (positive) temperature coefficient to start discharging (charging), and uses the entropy reduction brought about by the redox reaction to release heat and preheat the power / energy storage battery, so that the temperature of the power / energy storage battery rises and the normal transmission of electrical energy is started. At the same time, the voltage of the thermoelectric battery increases (decreases) to achieve high-voltage discharge (low-voltage charging).

[0035] Take the thermoelectric battery with negative temperature coefficient as an example: for low temperature environment, before the power / energy storage battery works, the signal of the monitoring point causes the sensor to drive the thermoelectric battery to discharge first, and use the heat released to preheat the power / energy storage battery, so that the temperature of the power / energy storage battery rises and reaches the ideal working conditions for discharge. During this period, the thermoelectric battery cools down and the voltage increases, achieving high-voltage discharge. When the temperature rises too much, the sensor drives the thermoelectric battery to switch to the charging state, absorbs heat from the power / energy storage battery, cools it down and continues to discharge. The thermoelectric battery heats up and the voltage decreases, achieving low-voltage charging.

[0036] In response to the overheating conditions caused by impedance in high temperature environments or during the discharge process of power / energy storage batteries, before the power / energy storage battery works, the signal from the monitoring point causes the sensor to drive the thermoelectric battery to charge. The property of the electrochemical reaction to absorb heat and increase entropy in this process is used to transfer the heat of the power / energy storage battery to the thermoelectric battery, cool the power / energy storage battery, achieve ideal working conditions, and discharge. During this period, the temperature of the thermoelectric battery rises and the voltage decreases, achieving low-voltage charging. When the temperature drops too much, the sensor drives the thermoelectric battery to switch to the discharge state, releasing heat to the power / energy storage battery, causing it to heat up and continue to discharge. The temperature of the thermoelectric battery drops and the voltage increases, achieving high-voltage discharge.

[0037] Based on the above working process, in addition to the power / energy storage battery outputting electrical energy in the ideal temperature range, the composite battery can also utilize the low voltage charging and high voltage discharging characteristics of the temperature difference battery to achieve additional power output.

[0038] For environments that are too low or too high, multiple temperature difference batteries can be stacked, and the cooling capacity and heating capacity can be superimposed multiple times to achieve a considerable range of temperature control for the power / energy storage battery and ensure high-performance discharge output.

[0039] By combining monitoring points, sensors and wires, a dynamic balance of temperature and heat can be achieved in any environment.

[0040] When the monitoring point detects the charging status of the power / energy storage battery:

[0041] When the power / energy storage battery is charging and storing energy, the monitoring point returns the power / energy storage battery temperature signal to the sensor, and the sensor determines the difference between the temperature and the high temperature requirement to be achieved. If it is less than the high temperature requirement, the negative (positive) temperature coefficient thermoelectric battery is driven to discharge (charge), release heat to the power / energy storage battery, make it reach a high temperature, and start charging; if it is higher than the high temperature requirement, the negative (positive) temperature coefficient thermoelectric battery is driven to charge (discharge), absorb the heat of the power / energy storage battery, cool it down to a reasonable high temperature, and start charging.

[0042] Thermoelectric batteries are used to make the power / energy storage battery enter a high temperature state. High temperature improves the conductivity of the power / energy storage battery electrolyte, promotes the reaction rate between the electrode and the electrolyte, and greatly reduces the impedance, thereby supporting high-rate fast charging. At the same time, the high temperature exposure time is very short, and the actual aging effect of the power / energy storage battery is relatively small. Ultimately, efficient charging and use is achieved.

[0043] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A composite battery with self-regulating working temperature suitable for a wide range of environmental conditions, characterized in that: It includes a power / energy storage battery and a thermoelectric battery. The thermoelectric battery is bonded to the outside of the power / energy storage battery. The power / energy storage battery is provided with multiple groups of monitoring points and also includes a control sensor electrically connected to the monitoring points. The control sensor is connected to control the charging and discharging of the thermoelectric battery to control heat absorption and heat release.

2. A composite battery with self-regulating working temperature suitable for wide range of environmental conditions according to claim 1, characterized in that: The power / energy storage battery includes any one of a lithium-ion battery, a nickel-hydrogen battery, a lead-acid battery, a solid-state battery, a fluid battery, and a sodium-ion battery.

3. A composite battery with self-regulating working temperature suitable for wide range of environmental conditions according to claim 1, characterized in that: The temperature difference battery and the power / energy storage battery are bonded by thermally conductive silicone.

4. A composite battery with self-regulating working temperature suitable for wide range of environmental conditions according to claim 1, characterized in that: The thermoelectric battery is provided with a redox couple; When the temperature coefficient of a thermoelectric battery is negative, it is an entropy increase reaction during charging, absorbing heat from the outside, and it is an entropy reduction reaction during discharge, releasing heat to the outside; When the temperature coefficient of a thermoelectric battery is positive, it is an entropy reduction reaction during charging, releasing heat to the outside world, and it is an entropy increase reaction during discharging, absorbing heat from the outside world.

5. A method for using a composite battery with self-regulating working temperature suitable for wide environmental conditions according to any one of claims 1 to 4, characterized in that: When the monitoring point detects the power / energy storage battery discharging working state, when it detects that the temperature of the power / energy storage battery is too high during the discharging process: The sensor receives the signal to control the negative temperature coefficient thermoelectric battery to start charging and absorbing heat, so that the power / energy storage battery can work at a lower temperature, and the voltage of the thermoelectric battery can be reduced, thus achieving low-voltage charging. The sensor receives the signal to control the thermoelectric battery with a positive temperature coefficient to start discharging and absorbing heat, so that the power / energy storage battery can cool down and work. The voltage of the thermoelectric battery increases, and high-voltage discharge is achieved. When it is detected that the temperature of the power / energy storage battery is too low and the power / energy storage battery cannot work: The sensor receives the signal to control the negative temperature coefficient thermoelectric battery to start discharging and releasing heat. The temperature of the power / energy storage battery rises, and the normal power transmission is started. At the same time, the voltage of the thermoelectric battery increases, achieving high voltage discharge. The sensor receives the signal to control the positive temperature coefficient thermoelectric battery to start charging and releasing heat. The temperature of the power / energy storage battery rises, and the normal power transmission is started. At the same time, the voltage of the thermoelectric battery decreases, realizing low-voltage charging.

6. A method for using a composite battery with self-regulating working temperature suitable for wide range of environmental conditions according to any one of claims 1 to 4, characterized in that: When the monitoring point detects the charging state of the power / energy storage battery, the monitoring point returns the power / energy storage battery temperature signal to the sensor, and the sensor determines the difference between the temperature and the high temperature requirement to be achieved: When the temperature is lower than the high temperature requirement, the negative temperature coefficient thermoelectric battery is driven to discharge, release heat to the power / energy storage battery, and start fast charging in a low impedance state; when the temperature is higher than the high temperature requirement, the negative temperature coefficient thermoelectric battery is driven to charge, absorb the heat of the power / energy storage battery, cool it down, and start fast charging; When the high temperature demand is not met, the positive temperature coefficient thermoelectric battery is driven to charge, heat is released to the power / energy storage battery, and fast charging starts in a low impedance state; When it is higher than the high temperature requirement, the positive temperature coefficient thermoelectric battery is driven to discharge, absorb the heat of the power / energy storage battery, cool it down, and start fast charging.

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