CN219017769U - Intelligent temperature control type lithium battery for electric vehicle - Google Patents

Abstract

The utility model relates to the technical field of lithium battery equipment, in particular to an intelligent temperature control type lithium battery for an electric vehicle, which comprises a lithium ion battery body, a heating sleeve coated on the outer surface of the lithium ion battery body, an intelligent controller and a temperature sensor for detecting the ambient temperature, wherein the heating sleeve is arranged on the outer surface of the lithium ion battery body; the heating sleeve comprises an aluminum foil heat insulation film, a PTC self-temperature-limiting electrothermal film and an anti-corrosion film which are sequentially stacked from outside to inside; when the lithium ion battery body is sleeved in the heating sleeve, the anti-corrosion film of the heating sleeve is contacted with the surface of the lithium ion battery body; the intelligent controller comprises a processor, a DC-DC converter, a voltage detection circuit and a solid-state relay; the electronic modules are connected in a matched mode. In case the lithium ion battery body is detected to be in a charging state in a low-temperature environment, the intelligent temperature control type lithium battery for the electric vehicle can heat the lithium ion battery body by the intelligent control heating sleeve, so that the lithium ion battery body can be charged normally.

Description

Intelligent temperature control type lithium battery for electric vehicle

Technical Field

The utility model relates to the technical field of lithium battery equipment, in particular to an intelligent temperature control type lithium battery for an electric vehicle.

Background

As is well known, in winter with cold weather (particularly in a low-temperature environment with the temperature lower than 0 ℃), the lithium battery of the electric vehicle is difficult to fully charge, because the reaction speed of active substances in the lithium battery is reduced and the internal resistance is increased in the low-temperature environment, so that the lithium battery is difficult to fully charge, and the charging time of the electric vehicle is greatly prolonged. For example: the lithium battery of 72V30AH of the electric vehicle is charged by an adaptive charger in an environment of 20 ℃ for 6-8 hours (charging at low power), namely, the battery can be charged normally at night. And cannot be fully charged in a low-temperature environment for 10 hours. Thus, the problem with many user reactions is: the lithium battery of the electric vehicle is charged for too long in low temperature in winter, and is not fully charged when being frequently used, so that the endurance is influenced (the endurance reduction caused by insufficient discharge of the lithium battery of the electric vehicle in low temperature in winter is not considered).

The inventor points out that no technical solution for solving the problem that the lithium battery of the electric vehicle is difficult to fully charge in winter (due to low temperature) is found in the prior art and literature at present.

Disclosure of Invention

Therefore, in order to solve the above-mentioned problems, the present utility model provides an intelligent temperature control lithium battery for an electric vehicle, which is capable of heating the lithium ion battery body intelligently once the lithium ion battery body is detected to be in a charged state in a low-temperature environment, so that the lithium ion battery body can be charged normally.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an intelligent temperature control type lithium battery for an electric vehicle comprises a lithium ion battery body, a heating sleeve coated on the outer surface of the lithium ion battery body, an intelligent controller and a temperature sensor for detecting the ambient temperature;

the heating sleeve comprises an aluminum foil heat insulation film, a PTC self-temperature-limiting electrothermal film and an anti-corrosion film which are sequentially stacked from outside to inside; when the lithium ion battery body is sleeved in the heating sleeve, the anti-corrosion film of the heating sleeve is contacted with the surface of the lithium ion battery body;

the intelligent controller comprises a processor, a DC-DC converter, a voltage detection circuit and a solid-state relay;

the input end of the DC-DC converter and the input end of the voltage detection circuit are respectively and electrically connected with the power end of the lithium ion battery body;

the power end of the processor and the input end of the solid-state relay are respectively and electrically connected with the output end of the DC-DC converter;

the output end of the solid-state relay is electrically connected with the PTC self-temperature-limiting electrothermal film to form a conductive loop;

and the output end of the temperature sensor, the output end of the voltage detection circuit and the control end of the solid-state relay are respectively and electrically connected with the processor.

Further, the intelligent controller also comprises a wireless communication module;

the power end of the wireless communication module is electrically connected with the output end of the DC-DC converter, and the wireless communication module is in communication connection with the processor.

Further, the wireless communication module adopts any one of a GPRS communication module, a Bluetooth module and a Wi-Fi module.

By adopting the technical scheme, the utility model has the beneficial effects that:

when needs use winter, establish the heating jacket on lithium ion battery body to set up temperature sensor because detect ambient temperature, when meeting following two conditions, intelligent control ware control (heating jacket's) PTC self-limiting temperature electrothermal film circular telegram generates heat, in order to make lithium ion battery body intensify:

(1) The temperature sensor detects the ambient temperature and transmits it to the processor, which determines that the ambient temperature is below a preset value (e.g., 0 ℃).

(2) The voltage detection circuit detects that the lithium ion battery body is being charged (when the lithium ion battery is charged, the voltage of the power supply end of the lithium ion battery is generally about 1.2 times the rated voltage of the lithium ion battery).

Because of the characteristic of the PTC self-temperature limiting electrothermal film, the heating temperature of the lithium ion battery body is not required to be too high. After the temperature of the lithium ion battery body is raised, the reaction speed of active substances can be improved, and the internal resistance is reduced, so that the lithium ion battery body can be normally charged.

In another mode, a user is in wireless connection with the intelligent controller through a mobile phone, and the PTC self-temperature-limiting electrothermal film is controlled to be electrified or powered off through the mobile phone.

Drawings

Fig. 1 is a cross-sectional view of a lithium ion battery body nested within a heating jacket.

Fig. 2 is a cross-sectional view of the heating jacket.

Fig. 3 is a circuit connection block diagram of an embodiment of the present utility model.

Detailed Description

The utility model will now be further described with reference to the drawings and detailed description.

Referring to fig. 1, 2 and 3, the present embodiment provides an intelligent temperature control type lithium battery for an electric vehicle, which includes a lithium ion battery body 1, a heating jacket 2, an intelligent controller 3 and a temperature sensor 4.

The lithium ion battery body 1 is an existing lithium ion battery structure, and in this embodiment, the lithium ion battery body 1 itself is not improved.

The heating sleeve 2 comprises an aluminum foil heat insulation film 21, a PTC self-temperature limiting electrothermal film 22 and an anti-corrosion film 23 which are sequentially stacked from outside to inside.

The PTC self-temperature-limiting electrothermal film 22 is made of an existing material, the PTC self-temperature-limiting electrothermal film 22 is heated after being electrified, and the internal resistance of the PTC self-temperature-limiting electrothermal film 22 increases with the increase of the temperature, so that the temperature is limited to continuously increase. Preferably, the design temperature of the PTC self-limiting electrothermal film 22 is within 50 ℃.

The anti-corrosion film 23 is made of a heat-conducting silica gel material.

When in use, the lithium ion battery body 1 is sleeved in the heating jacket 2, and the anti-corrosion film 23 of the heating jacket 2 is contacted with the surface of the lithium ion battery body 2. When not in use, the heating jacket 2 may be taken out.

It should be noted that the intelligent controller 3 and the temperature sensor 4 are external devices. And specifically, the temperature sensor 4 is not in contact with the lithium ion battery body 2, and the temperature sensor 4 is used for detecting the ambient temperature.

The intelligent controller 3 comprises a processor 31, a DC-DC converter 32, a voltage detection circuit 33, a solid state relay 34 and a GPRS communication module 35. In actual setting, the processor 31, the DC-DC converter 32, the voltage detection circuit 33, the solid state relay 34, and the wireless communication module are integrated on a PCB circuit board, which is not described in detail herein.

In this embodiment, the GPRS communication module 35 is a GPRS communication module.

The voltage detection circuit 33 is configured to detect a power supply voltage of the lithium ion battery body 1, and if the lithium ion battery body 1 is charged, the power supply voltage of the lithium ion battery body 1 is the charging voltage. The charging voltage is generally about 1.2 times the rated voltage of the lithium ion battery body 1. Therefore, when the voltage detection circuit 33 detects that the power supply terminal voltage of the lithium ion battery body 1 is about 1.2 times the rated voltage of the lithium ion battery body 1, the processor 31 determines that the lithium ion battery body 1 is being charged.

It should be noted that: according to the specification and the drawings, the electronic component models are selected by a person skilled in the art, and after limited circuit connection experiments, the intelligent temperature control type lithium battery for the electric vehicle disclosed in the patent application can be completely reproduced, and the same technical effects are achieved.

Specifically, the connection mode of each electronic component of the intelligent temperature control type lithium battery for the electric vehicle is as follows:

the input end of the DC-DC converter 32 is electrically connected to the power end of the lithium ion battery body 1, and the voltage of the lithium ion battery body 1 is transformed by the DC-DC converter 32.

The input end of the voltage detection circuit 33 is electrically connected with the power end of the lithium ion battery body 1, and the voltage of the power end of the lithium ion battery body 1 is detected by the voltage detection circuit 33.

The power end of the processor 31 is electrically connected to the output end of the DC-DC converter, and supplies power to the processor 31.

The power end of the GPRS communication module 35 is electrically connected with the output end of the DC-DC converter, and supplies power to the GPRS communication module 35, and the GPRS communication module 35 is in communication connection with the processor 31. The user can establish a wireless connection between the handset and the intelligent controller 3 (via the GPRS communication module 35).

The input end of the solid state relay 34 is electrically connected with the output end of the DC-DC converter 32, the output end of the solid state relay 34 is electrically connected with the PTC self-limiting electrothermal film 22 to form a conductive loop, and the PTC self-limiting electrothermal film 22 heats after the solid state relay 34 is turned on.

The temperature sensor 4, the output end of the voltage detection circuit 33 and the control end of the solid state relay 34 are respectively electrically connected with the processor 31.

The working principle of the intelligent temperature control type lithium battery for the electric vehicle is as follows:

when the lithium ion battery body 1 needs to be used in winter, the heating sleeve 2 is sleeved on the lithium ion battery body 1, and the temperature sensor 4 is arranged to detect the ambient temperature, when the following two conditions are met, the intelligent controller 3 controls the PTC self-temperature-limiting electrothermal film 22 (of the heating sleeve 2) to electrify and heat so as to heat the lithium ion battery body 1:

(1) The temperature sensor 4 detects the ambient temperature and transmits it to the processor 31, and the processor 31 judges that the ambient temperature is lower than a preset value (for example, 0 ℃).

(2) The voltage detection circuit 33 detects that the lithium ion battery body 1 is being charged.

Further, due to the characteristics of the PTC self-temperature limiting electrothermal film 22, there is no concern about excessively high heating temperature of the lithium ion battery body 1.

After the temperature of the lithium ion battery body 1 is raised, the reaction speed of the active material can be improved, and the internal resistance becomes small, so that the lithium ion battery body 1 can be charged normally.

The GPRS communication module 35 may also be replaced by a wireless communication module such as a bluetooth module or a Wi-Fi module.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (3)

1. The utility model provides an electric motor car is with intelligent control by temperature change formula lithium cell, includes lithium ion battery body, its characterized in that:

the lithium ion battery also comprises a heating sleeve, an intelligent controller and a temperature sensor, wherein the heating sleeve is coated on the outer surface of the lithium ion battery body, and the temperature sensor is used for detecting the ambient temperature;

the heating sleeve comprises an aluminum foil heat insulation film, a PTC self-temperature-limiting electrothermal film and an anti-corrosion film which are sequentially stacked from outside to inside; when the lithium ion battery body is sleeved in the heating sleeve, the anti-corrosion film of the heating sleeve is contacted with the surface of the lithium ion battery body;

the intelligent controller comprises a processor, a DC-DC converter, a voltage detection circuit and a solid-state relay;

the input end of the DC-DC converter and the input end of the voltage detection circuit are respectively and electrically connected with the power end of the lithium ion battery body;

the power end of the processor and the input end of the solid-state relay are respectively and electrically connected with the output end of the DC-DC converter;

the output end of the solid-state relay is electrically connected with the PTC self-temperature-limiting electrothermal film to form a conductive loop;

and the output end of the temperature sensor, the output end of the voltage detection circuit and the control end of the solid-state relay are respectively and electrically connected with the processor.

2. The intelligent temperature-controlled lithium battery for an electric vehicle according to claim 1, wherein:

the intelligent controller also comprises a wireless communication module;

the power end of the wireless communication module is electrically connected with the output end of the DC-DC converter, and the wireless communication module is in communication connection with the processor.

3. The intelligent temperature-controlled lithium battery for an electric vehicle according to claim 2, wherein:

the wireless communication module adopts any one of a GPRS communication module, a Bluetooth module and a Wi-Fi module.

Images