阅读说明：本技术 一种动力电池用加热系统 (Heating system for power battery ) 是由 陈莹 *** 徐秋鹏 于 2019-09-30 设计创作，主要内容包括：本发明公开了一种动力电池用加热系统,包括：多个加热模块、加热集成控制器和温度传感器,多个所述加热模块、所述温度传感器、所述功率检测模块和所述功率获取模块分别通过导线与所述加热集成控制器通讯连接,所述加热模块包括一个导热板、多个加热单元和多个加热信号接收单元,所述导热板上设置有用于固定多个所述加热单元和多个所述加热信号接收单元的固定腔,所述加热单元设置在所述固定腔内,所述加热信号接收单元设置在所述固定腔内,所述加热集成控制器包括与所述加热控制信号接受单元数量相同的信号控制单元。本发明提高了动力电池低温环境下放电性能,提高了动力电池续航行能力。(The invention discloses a heating system for a power battery, which comprises: the heating module comprises a heat conduction plate, a plurality of heating units and a plurality of heating signal receiving units, the heat conduction plate is provided with a fixed cavity for fixing the heating units and the heating signal receiving units, the heating units are arranged in the fixed cavity, the heating signal receiving units are arranged in the fixed cavity, and the heating integrated controller comprises signal control units with the same number as the heating control signal receiving units. The invention improves the discharging performance of the power battery in a low-temperature environment and improves the continuous navigation capability of the power battery.)

1. A heating system for a power cell, comprising: the heating system comprises a plurality of heating modules, a heating integrated controller and a temperature sensor, wherein the heating modules and the temperature sensor are respectively in communication connection with the heating integrated controller through conducting wires;

the heating module comprises a heat conducting plate, a plurality of heating units and a plurality of heating signal receiving units;

the heat conducting plate is provided with a fixing cavity for fixing the plurality of heating units and the plurality of heating signal receiving units;

the heating unit is arranged in the fixing cavity;

the heating signal receiving unit is arranged in the fixing cavity and is used for receiving a control signal of the heating integrated controller and starting and closing the heating unit;

the heating integrated controller comprises signal control units with the same number as the heating control signal receiving units, and the signal control units are used for sending heating starting and stopping control signals to the corresponding heating signal receiving units;

the temperature sensor is used for detecting the temperature of the power battery in real time and sending the detected temperature of the power battery to the heating integrated controller so as to realize real-time monitoring on the temperature of the power battery.

2. The heating system for power battery as claimed in claim 1, wherein: the heat conducting plate is any one of an aluminum plate and an aluminum profile with good heat conducting performance.

3. The heating system for power battery as claimed in claim 1, wherein: the power acquisition module and the power detection module are also included;

the power acquisition module is electrically connected with the heating unit and the heating integrated controller through leads respectively, and is used for acquiring the target power of the heating unit;

the power detection module is electrically connected with the heating unit and the heating integrated controller through leads respectively, and is used for continuously detecting the feedback power of the heating unit.

4. The heating system for power battery as claimed in claim 3, wherein: when the current feedback power of the heating unit is larger than the target power, the heating integrated controller judges whether the feedback power of the heating unit is in a descending stage according to the current feedback power and the last feedback power, and if not, the heating integrated controller reduces the heating power of the heating unit according to the difference value of the current feedback power and the target power.

5. The heating system for power battery as claimed in claim 3, wherein: when the current feedback power of the heating unit is smaller than or equal to the target power, the heating integrated controller judges whether the feedback power of the heating unit is in a rising stage according to the current feedback power and the last feedback power, and if not, the heating integrated controller increases the heating power of the heating unit according to the difference value of the current feedback power and the target power.

6. The heating system for power battery as claimed in claim 1, wherein: still include overtime fault alarm module, overtime fault alarm module pass through the wire with heating integrated control ware communication is connected, overtime fault alarm module is used for the signal control unit gives the temperature that surpasss behind the heating signal receiving element sending heating start and stop control signal behind the time threshold value of predetermineeing is not up to predetermineeing the temperature, carries out overtime fault alarm.

7. The heating system for the power battery according to claim 6, characterized in that: the preset time threshold value is 30-60 s.

8. The heating system for power battery as claimed in claim 1, wherein: the temperature sensor is a thermal resistance temperature sensor, the collection temperature range is-200 ℃ to +200 ℃, and the precision is 0.1 ℃.

Technical Field

The invention belongs to the technical field of power batteries, and particularly relates to a heating system for a power battery.

Background

In recent years, with the increasing exhaustion of traditional fossil fuel resources such as petroleum and the rapid increase of global warming caused by the unregulated emission of greenhouse gases, people have increasingly high demand for the development and utilization of renewable clean energy sources such as solar energy, wind energy, biological energy and the like. Under the background, relevant policy and regulations are issued by countries in the world to guide and encourage enterprises, schools and relevant scientific research units to research and develop new energy vehicles mainly consuming electricity, so that the traditional fuel vehicles which consume petroleum to provide power sources are gradually replaced. The power battery system is used as a source of power of the electric automobile and is defined as a core component influencing key performance of the whole automobile. Therefore, a great deal of manpower and material resources are being invested in developing a vehicle power battery system with high safety, reliability, charging efficiency and energy density in various large battery cell factories, PACK factories and whole vehicle factories. Currently, there are lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and lithium-ion batteries, which are commercially available on a large scale. Compared with other three batteries, the lithium ion battery has the advantages of light weight, large energy storage, less pollution, long service life, low self-discharge rate and the like. Thus, power cells PACK assembled with lithium ion batteries have become the first choice for large vehicle enterprises, and it is anticipated that this trend will remain in the future for a considerable period of time before other more advanced energy storage technologies emerge. However, lithium ion batteries suffer from their inherent characteristics, and have the disadvantages of severely reduced performance and life under low temperature environments, such as weak charging capability, low discharge capacity, severe fading, poor cycle rate performance, and the like. Research shows that the lithium ion battery can work at the temperature of-20 ℃ to 60 ℃ generally, but the discharge performance of the lithium ion battery is obviously reduced when the environmental temperature is lower than 0 ℃. Therefore, in order to solve the problems of energy attenuation and shortened endurance mileage of the electric vehicle battery in low-temperature environments such as high latitudes, cold winter and the like, a reliable technical means is needed to be found to ensure that the power battery works at a proper temperature.

Disclosure of Invention

The heating system for the power battery is provided for solving the defects in the prior art, can heat the power battery, improves the discharging performance of the power battery in a low-temperature environment, and improves the continuous sailing capacity of the power battery.

In order to achieve the purpose, the invention provides the following technical scheme:

a heating system for a power cell, comprising: the heating system comprises a plurality of heating modules, a heating integrated controller and a temperature sensor, wherein the heating modules and the temperature sensor are respectively in communication connection with the heating integrated controller through conducting wires;

the heating module comprises a heat conducting plate, a plurality of heating units and a plurality of heating signal receiving units;

the heat conducting plate is provided with a fixing cavity for fixing the plurality of heating units and the plurality of heating signal receiving units;

the heating unit is arranged in the fixing cavity;

the heating signal receiving unit is arranged in the fixing cavity and is used for receiving a control signal of the heating integrated controller and starting and closing the heating unit;

the heating integrated controller comprises signal control units with the same number as the heating control signal receiving units, and the signal control units are used for sending heating starting and stopping control signals to the corresponding heating signal receiving units;

the temperature sensor is used for detecting the temperature of the power battery in real time and sending the detected temperature of the power battery to the heating integrated controller so as to realize real-time monitoring on the temperature of the power battery.

Preferably, the heat conducting plate is any one of an aluminum plate and an aluminum profile with good heat conducting performance.

Preferably, the system further comprises a power acquisition module and a power detection module;

the power acquisition module is electrically connected with the heating unit and the heating integrated controller through leads respectively, and is used for acquiring the target power of the heating unit;

the power detection module is electrically connected with the heating unit and the heating integrated controller through leads respectively, and is used for continuously detecting the feedback power of the heating unit.

Preferably, when the current feedback power of the heating unit is greater than the target power, the heating integrated controller judges whether the feedback power of the heating unit is in a descending stage according to the current feedback power and the last feedback power, and if not, the heating integrated controller reduces the heating power of the heating unit according to a difference value between the current feedback power and the target power.

Preferably, when the current feedback power of the heating unit is less than or equal to the target power, the heating integrated controller judges whether the feedback power of the heating unit is in a rising stage according to the current feedback power and the last feedback power, and if not, the heating integrated controller increases the heating power of the heating unit according to a difference value between the current feedback power and the target power.

Preferably, still include overtime fault alarm module, overtime fault alarm module pass through the wire with heating integrated control ware communication connection, overtime fault alarm module is used for the signal control unit gives the heating signal receiving element surpasss behind the heating start and stop control signal and the temperature of power battery does not reach preset temperature behind the preset time threshold value, carries out overtime fault alarm.

Preferably, the preset time threshold is 30-60 s.

Preferably, the temperature sensor is a thermal resistance temperature sensor, the collection temperature range is-200 ℃ to +200 ℃, and the precision is 0.1 ℃.

The invention has the technical effects and advantages that:

according to the heating system, the heat conduction plate, the heating unit and the heating signal receiving unit form a single heating module, the heating modules are connected to the heating integrated controller in parallel, and the heating integrated controller is electrically connected with the temperature sensor to form the heating system, so that the power battery can be heated, the discharging performance of the power battery in a low-temperature environment is improved, and the continuous sailing capability of the power battery is improved.

Drawings

FIG. 1 is a functional block diagram of a heating system for a power cell of the present invention;

FIG. 2 is a functional block diagram of a heating integrated controller of a heating system for a power battery according to the present invention;

fig. 3 is a functional block diagram of a heating module of the heating system for a power battery according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a heating system for a power battery, including: the heating module and the thermal resistance temperature sensor are respectively in communication connection with the heating integrated controller through conducting wires;

the heating module comprises a heat conducting plate, a plurality of heating units and a plurality of heating signal receiving units;

the heat conducting plate is any one of an aluminum plate and an aluminum profile with good heat conducting performance, and a fixing cavity for fixing the plurality of heating units and the plurality of heating signal receiving units is arranged on the heat conducting plate;

the heating unit is arranged in the fixed cavity;

the heating signal receiving unit is arranged in the fixing cavity and used for receiving a control signal of the heating integrated controller and starting and closing the heating unit;

the heating integrated controller comprises signal control units with the same number as the heating control signal receiving units, and the signal control units are used for sending heating starting and stopping control signals to the corresponding heating signal receiving units;

the collection temperature range of the thermal resistance temperature sensor is-200 ℃ to +200 ℃, the precision is 0.1 ℃, and the thermal resistance temperature sensor is used for detecting the temperature of the power battery in real time and sending the detected temperature of the power battery to the heating integrated controller so as to realize real-time monitoring on the temperature of the power battery.

The heating unit is electrically connected with the heating unit through a wire, the heating integrated controller is electrically connected with the heating unit through a wire, the power acquisition module is used for acquiring target power of the heating unit, and the power detection module is used for continuously detecting feedback power of the heating unit.

When the current feedback power of the heating unit is larger than the target power, the heating integrated controller judges whether the feedback power of the heating unit is in a descending stage or not according to the current feedback power and the last feedback power, if not, the heating integrated controller reduces the heating power of the heating unit according to the difference value of the current feedback power and the target power, when the current feedback power of the heating unit is smaller than or equal to the target power, the heating integrated controller judges whether the feedback power of the heating unit is in an ascending stage or not according to the current feedback power and the last feedback power, and if not, the heating integrated controller increases the heating power of the heating unit according to the difference value of the current feedback power and the target power.

The heating signal receiving unit is used for receiving a heating signal, the heating signal receiving unit is used for receiving a heating start control signal and a heating stop control signal, the heating signal receiving unit is used for receiving the heating start control signal and the heating stop control signal, the temperature of the power battery does not reach a preset temperature after the heating start control signal and the heating stop control signal exceed 30-60 s, and overtime fault alarming is carried.

The specific manufacturing steps of the heating system are as follows:

s1, selecting the shape and the size of the heat conducting plate;

s2, mechanically connecting and fixing the heating units and the heating signal receiving units in a fixed cavity on the heat conducting plate in any reliable manner, and leading out the signal wires of the signal receiving units from the fixed cavity of the heat conducting plate to form a heating module;

s3, selecting the number of heating modules according to the requirement;

and S4, electrically connecting a specified number of heating modules to the heating integrated controller in parallel through electric connection, and electrically connecting the heating integrated controller with the thermal resistance temperature sensor to form a heating system.

In summary, the following steps: according to the heating system, the heat conduction plate, the heating unit and the heating signal receiving unit form a single heating module, the heating modules are connected to the heating integrated controller in parallel, and the heating integrated controller is electrically connected with the temperature sensor to form the heating system, so that the power battery can be heated, the discharging performance of the power battery in a low-temperature environment is improved, and the continuous sailing capability of the power battery is improved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.