阅读说明：本技术 一种高功率锂原电池低温环境下的预启动系统 (Pre-starting system of high-power lithium primary battery in low-temperature environment ) 是由 刘志伟 刘浩杰 王九洲 于 2019-11-21 设计创作，主要内容包括：本发明公开了一种高功率锂原电池低温环境下的预启动系统,属于化学电源技术领域,高功率锂原电池由方形软包电池和薄膜电加热片粘贴后层叠而成,高功率锂原电池的电气结构由软包电池单体串并联构成,预启动系统至少包括：铺设在所述高功率锂原电池中电池单体之间的电加热器件,电加热器件通过导线与串联电池组的正负极相接；控制所述电加热器件工作状态的控制器；控制器与上述导线上的电控开关电连接；用于获取高功率锂原电池中电池单体电压信息的电压传感器；用于获取高功率锂原电池中电池单体温度信息的温度传感器；控制器接收电压传感器的电压信号和温度传感器的温度信号,并根据接收到的电压信号和温度信号,进而控制电控开关的开闭状态。(The invention discloses a pre-starting system of a high-power lithium primary battery in a low-temperature environment, which belongs to the technical field of chemical power sources, wherein the high-power lithium primary battery is formed by sticking and laminating a square soft-package battery and a thin-film electric heating sheet, the electric structure of the high-power lithium primary battery is formed by connecting soft-package battery monomers in series and in parallel, and the pre-starting system at least comprises: the electric heating device is laid between the single batteries in the high-power lithium primary battery and is connected with the positive electrode and the negative electrode of the series battery pack through a lead; a controller for controlling the working state of the electric heating device; the controller is electrically connected with the electric control switch on the lead; the voltage sensor is used for acquiring the voltage information of a battery monomer in the high-power lithium primary battery; the temperature sensor is used for acquiring temperature information of battery monomers in the high-power lithium primary battery; the controller receives a voltage signal of the voltage sensor and a temperature signal of the temperature sensor, and controls the on-off state of the electric control switch according to the received voltage signal and the received temperature signal.)

1. The utility model provides a preliminary start-up system under high power lithium primary cell low temperature environment, high power lithium primary cell is pasted the back by square laminate polymer battery and film electric heating plate and is formed, and high power lithium primary cell's electrical structure comprises laminate polymer battery monomer series-parallel connection, its characterized in that, preliminary start-up system includes at least: the electric heating device is laid between the single batteries in the high-power primary lithium battery and is connected with the positive electrode and the negative electrode of the series battery pack through a lead;

a controller for controlling the working state of the electric heating device; the controller is electrically connected with the electric control switch on the lead;

the voltage sensor is used for acquiring the voltage information of a battery monomer in the high-power lithium primary battery;

the temperature sensor is used for acquiring temperature information of battery monomers in the high-power lithium primary battery; wherein:

the controller receives a voltage signal of the voltage sensor and a temperature signal of the temperature sensor, and controls the on-off state of the electric control switch according to the received voltage signal and the received temperature signal.

2. The pre-starting system for the primary high-power lithium battery in the low-temperature environment according to claim 1, wherein the electrically controlled switch is an electromagnetic relay or a MOS transistor.

3. The pre-starting system for the primary high-power lithium battery in the low-temperature environment according to claim 1, wherein the temperature sensor is an MF55 thin film thermistor.

4. The pre-start system for a primary high power lithium battery in a low temperature environment of claim 1, wherein the voltage sensor is an LTC6804 chip.

Technical Field

The invention belongs to the technical field of chemical power supplies, and particularly relates to a pre-starting system of a high-power lithium primary battery in a low-temperature environment.

Background

The lithium primary battery refers to a primary battery using metal lithium as a negative electrode. The current mature 3V lithium primary cell consists primarily of lithium manganese dioxide (Li/MnO)₂) Lithium sulfiteAcyl chloride (Li/SOCl)₂) Lithium sulfur dioxide (Li/SO)₂) The battery has the specific energy of 200 Wh/kg-400 Wh/kg, is a primary battery system with the highest specific energy at present, and is widely applied to various fields of sea, land, air, sky and electricity. With the increasing demand, the primary lithium battery with high power output characteristic is receiving more and more attention on the premise of ensuring high specific energy characteristic. However, since the low-temperature environment has a significant inhibiting effect on the power characteristics of the lithium primary battery, the load carrying capacity of the high-power lithium primary battery in the low-temperature environment is greatly limited, and this problem has become a critical problem to be solved in the current engineering application. Currently, the high power lithium primary battery usually adopts measures of reducing power output and even stopping the battery under low temperature environment to deal with the above problems, which can cause serious influence on the task reliability of the whole system or equipment. Aiming at the problem, a pre-starting method must be designed, which not only can ensure the high specific energy characteristic, but also can improve the high-power loading capacity of the lithium primary battery in the initial stage under the low-temperature environment, thereby improving the environmental adaptability of the high-power lithium primary battery.

Disclosure of Invention

The invention provides a pre-starting system of a high-power lithium primary battery in a low-temperature environment for solving the technical problems in the prior art, and solves the problem of insufficient loading capacity of the high-power lithium primary battery in the low-temperature environment through a self-heating pre-starting mode, so that the high-power lithium primary battery has high-power output capacity in the low-temperature environment, thereby greatly improving the environmental adaptability of the high-power lithium primary battery and improving the use reliability of the lithium primary battery.

The invention adopts the following specific technical scheme:

the utility model provides a preliminary start-up system under high power lithium primary cell low temperature environment, high power lithium primary cell is pasted the back by square laminate polymer battery and film electric heating plate and is formed, and high power lithium primary cell's electrical structure comprises laminate polymer battery monomer series-parallel connection, preliminary start-up system includes at least: the electric heating device is laid between the single batteries in the high-power primary lithium battery and is connected with the positive electrode and the negative electrode of the series battery pack through a lead;

a controller for controlling the working state of the electric heating device; the controller is electrically connected with the electric control switch on the lead;

the voltage sensor is used for acquiring the voltage information of a battery monomer in the high-power lithium primary battery;

the temperature sensor is used for acquiring temperature information of battery monomers in the high-power lithium primary battery; wherein:

the controller receives a voltage signal of the voltage sensor and a temperature signal of the temperature sensor, and controls the on-off state of the electric control switch according to the received voltage signal and the received temperature signal.

Further, the electric control switch is an electromagnetic relay or an MOS tube.

Further, the temperature sensor adopts an MF55 film thermistor.

Further, the voltage sensor adopts an LTC6804 chip.

The invention has the advantages and positive effects that:

by adopting the technical scheme, the invention has the following technical effects:

1. the invention solves the problem of insufficient high-power loading capacity of the high-power lithium primary battery in the initial discharge stage under the low-temperature environment;

2. the invention adopts a self-heating mode, thereby not only avoiding the problem of the reduction of the specific energy of the battery pack caused by adopting external power supply modes such as an independent power supply and the like, but also greatly shortening the time of pre-starting;

3. the invention adopts an intelligent autonomous control mode, realizes the adaptive control of the pre-starting time, avoids the problem of inconsistent pre-starting effect caused by inconsistent environmental temperature under the control modes of manual control, simple timing control and the like, and ensures the reliability of pre-starting.

Drawings

FIG. 1 is a block diagram of a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of a high power lithium primary battery and an electric heating plate according to a preferred embodiment of the present invention.

In the figure: 1. a battery cell; 2. an electrical heating sheet; 3. a two-core J30J connector; 4. a thin film thermistor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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 invention and are not intended to limit the invention.

On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.

Referring to fig. 1 and 2, in a pre-start system of a high power lithium primary battery in a low temperature environment, an electrical heating device (e.g., an electrical heating sheet 2) is laid between battery cells 1 of the high power lithium primary battery, the electrical heating device is connected to the positive and negative electrodes of a series battery pack through a lead, a control device (e.g., an electromagnetic relay or a MOS transistor) is disposed on the lead to control the on and off of a circuit, and a control signal of the control device is provided by a special microcontroller unit. When the lithium primary battery pack is in a working state, the control unit collects the voltage of each monomer of the lithium primary battery pack, the temperature of each monomer of the lithium primary battery pack and other parameter information in real time through elements such as the voltage collecting chip and the temperature sensor, and completes the output of a control signal to the control device on the basis of times, so as to control the working time and the working state of the electric heating device, realize the switching control of the self-heating mode and complete the pre-starting of the high-power lithium primary battery in a low-temperature environment.

The pre-starting specific process of the preferred embodiment is as follows: the controller acquires initial state information of the battery pack through the voltage acquisition chip and the temperature sensor, judges the initial state of the battery pack in the next time, if the judgment result is that the initial temperature state of the battery pack is a low-temperature state, the controller starts a control switch of the electric heating device, executes a pre-starting process, and the judgment condition of the completion of the pre-starting process is that the output voltage of the battery pack meets the requirement of high-power output.

The above embodiment includes the following four parts: the device comprises a high-power lithium primary battery, an electric heating device, a control device and a microprocessor control unit.

The high-power lithium primary battery is formed by laminating a square soft package battery and a thin film electric heating sheet after being pasted (as shown in figure 1), the electrical structure of the battery pack is formed by connecting soft package battery monomers in series and parallel, two wires are led out from each thin film electric heating sheet and are used for building a self-heating circuit, the electric heating sheet can adopt a series connection mode to build the self-heating circuit, and the resistance value and the appearance size of the electric heating sheet are designed according to the appearance size of the battery monomers. The electric heating plate is connected to the power output pin of the electromagnetic relay through a lead-out wire by means of a two-core J30J connector 3, and the control pin of the electromagnetic relay is connected to the microprocessor control unit through a two-core J30J connector. The temperature sensor adopts MF55 film thermistor, is attached to the film electric heating sheet, and is connected with the microprocessor control unit through lead wires and connectors. The microprocessor control unit is connected to the lug of each monomer and the MF55 film thermistor 4 through a multi-core J30J connector and a test lead so as to realize the acquisition function of the state information of the battery pack, such as the monomer voltage, the temperature and the like. The voltage acquisition chip adopts an LTC6804 chip, and single chip can realize single voltage information of at most 12 strings of battery packs.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.