CN210723282U

CN210723282U - Lithium ion battery pack device

Info

Publication number: CN210723282U
Application number: CN201921666357.8U
Authority: CN
Inventors: 贾明; 刘芳洋; 陈晨; 蒋良兴
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-09
Anticipated expiration: 2029-10-08

Abstract

The utility model provides a lithium ion battery group device, include the battery box and be held in the battery box's battery cell, the battery box is inside will through the baffle a plurality of battery cavity are cut apart into to the battery box is inside, a plurality of groups of battery are constituteed to battery cell, and each the group battery hold in battery cavity, each the top and the bottom of baffle all are provided with an at least through-hole so that communicate between every double-phase adjacent battery cavity. The temperature inside the lithium ion battery pack tends to be consistent, and the service performance of the whole lithium ion battery pack is improved.

Description

Lithium ion battery pack device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a lithium ion battery group technical field especially relates to a lithium ion battery group device.

[ background of the invention ]

The lithium ion battery has high energy density, capacity 2-3 times that of a nickel-hydrogen battery with the same weight, low self-discharge rate, no memory effect, no toxic substance and the like, and is widely applied to electric equipment such as electric automobiles, electric bicycles, electric airplanes and the like.

In order to achieve the rated voltage required by the electric equipment, the single batteries are required to be connected in series and in parallel to be used in the form of a battery pack. However, under the series-parallel connection working condition of the single batteries, the parameters such as internal resistance, capacitance, voltage, temperature and self-discharge have consistency differences, which greatly affects the working efficiency of the battery pack, especially under extreme charging and discharging conditions such as large current, ultralow temperature and ultrahigh temperature, relatively poor single batteries can be degraded in an accelerated manner, the overall service life of the battery pack is affected, and finally, the reverse polarity of the degraded batteries is easily caused, so that the safety problem is caused.

Particularly, although the working temperature of the lithium ion battery is usually-20 to 60 ℃, the comprehensive performance of the lithium ion battery still has a great relationship with the actual environment temperature, if the environment temperature is too high, the performance and the service life of the lithium ion battery are affected, thermal disturbance is generated, the thermal stability of the battery composition material is damaged, thermal side reaction is caused, and finally the safety problem is caused. If the environmental temperature is too low, the charge and discharge performance of the battery is greatly reduced due to the limitation of inherent factors of the material, such as reduction of molecular motion capability, increase of internal resistance and the like, so that the lithium ion battery cannot normally play a role.

Because the lithium ion battery can generate chemical reaction heat and resistance heat in the charging and discharging processes, especially the lithium ion battery with large monomer capacity and high energy ratio generates more heat when discharging with large current, and the performance of the lithium ion battery is seriously influenced. Therefore, current research on lithium ion batteries is mainly focused on heat dissipation management. However, when the battery pack is used at low temperature, especially when the temperature of the single battery is not uniform, the battery pack also causes poor accelerated degradation of the single battery, reduces the uniformity of the single battery, and affects the service life and safety of the battery pack.

[ Utility model ] content

The utility model provides a can lithium ion battery group structure be used for solving the problem that the difference of lithium ion battery cell leads to the performance to descend when current temperature uses to improve the life-span and the performance of group battery.

In order to achieve the above object, the utility model provides a lithium ion battery group structure, including a lithium ion battery group device, including the battery box with by the multiunit group battery that is held in the battery box, and the electricity connect in the temperature sensor module of the group battery that sets up side by side, its characterized in that, the temperature sensor module includes a plurality of temperature sensor units, wherein, each the temperature sensor unit is corresponding ground electric connection in the group battery respectively for measure the ambient temperature that each group battery located respectively.

The utility model discloses an in the embodiment, a plurality of battery cavity are cut apart into through the baffle to the battery box for hold the group battery, wherein, the temperature sensor unit is installed respectively in the battery cavity.

The utility model discloses an in the embodiment, battery cavity's top or bottom set up the temperature regulation pipe, the temperature regulation pipe will be a plurality of battery cavity communicates each other, battery cavity's heat passes through the temperature regulation pipe is from the higher battery cavity of temperature to the lower battery cavity transmission of temperature.

In an embodiment of the present invention, the pipe orifice of the temperature adjusting pipe faces the battery cavity direction.

In an embodiment of the present invention, the temperature adjustment pipe is a laval pipe.

The utility model discloses an in the embodiment, the mouth of pipe position of temperature regulation pipe is provided with ventilation equipment for accelerate the transmission of the temperature in the battery cavity that this ventilation equipment corresponds.

The utility model discloses an in an embodiment, lithium ion battery group structure still includes ventilation equipment the control unit, wherein, ventilation equipment the control unit electricity connect in the temperature sensor unit, the temperature sensor unit is used for monitoring the temperature of battery cavity to with temperature monitoring value send to ventilation equipment the control unit, fan the control unit basis this ventilation equipment the control unit of temperature detection value control corresponds ventilation equipment's rotational speed.

In an embodiment of the present invention, a plurality of temperature sensor units are connected in parallel, wherein the temperature sensor units are implemented as NTC resistors.

In an embodiment of the present invention, the plurality of battery packs are connected in series or in parallel, and each of the plurality of unit batteries in the battery pack are connected in series or in parallel.

In an embodiment of the present invention, the battery pack is detachably mounted on the battery box.

Compared with the prior art, the utility model has the advantages of: according to the lithium ion battery pack structure, the temperature region consistency in the lithium ion battery pack device is realized through the cooperation between the ventilation arrangement and the temperature sensor unit, and the service life and the service performance of the lithium ion battery pack device are improved.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a lithium ion battery pack device according to the present invention.

Fig. 2 is a schematic cross-sectional view of the lithium ion battery pack device according to the above embodiment of the present invention.

Fig. 3 is a schematic view of an adjusting block of the ventilation apparatus according to the above embodiment of the present invention.

[ detailed description ] embodiments

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents and other technical solutions without departing from the spirit and scope of the invention.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be understood that the terms "connected" and "connected," unless expressly specified or limited otherwise,

"connected" is to be understood in a broad sense, e.g. it may be a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 and fig. 2, a lithium ion battery pack device is illustrated, wherein the lithium ion battery pack device comprises a battery box 10 and a plurality of battery packs 20 accommodated in the battery box 10, and a temperature sensor module 30 electrically connected to the battery packs arranged side by side, the temperature sensor module 30 comprises a plurality of temperature sensor units 31, wherein each of the temperature sensor units 31 is electrically connected to the battery pack 20 correspondingly for measuring the ambient temperature of each battery pack 20, so that the temperature inside the battery pack device can be detected and controlled, and the transmission of the temperature inside the lithium ion battery pack device can be improved.

Further, the battery box 10 is divided into a plurality of battery cavities 11 by partition plates for accommodating the battery packs 20, wherein the temperature sensor units 30 are respectively installed in the battery cavities 11, and it is worth saying that each of the battery packs 20 is composed of a plurality of battery cells 21, wherein the plurality of battery cells 21 are connected in parallel or in series.

As shown in fig. 2, the internal structure of the lithium ion battery pack device of the present invention is illustrated, wherein the top or bottom of the battery cavity 11 is provided with a temperature adjusting tube 12, the temperature adjusting tube 12 is multiple, the battery cavity 11 is communicated with each other, the heat of the battery cavity 11 is passed through the temperature adjusting tube 12 from the battery cavity 11 with higher temperature to the battery cavity 11 with lower temperature.

It is worth saying that in the utility model discloses, the mouth of pipe orientation of temperature regulation pipe 12 battery cavity 11 direction sets up. The temperature adjusting pipe 12 is a laval pipe.

The opening of the temperature adjusting pipe 12 is provided with a ventilation device 13 for accelerating the temperature transmission in the battery cavity 11 corresponding to the ventilation device, and it is worth saying that the ventilation device can be implemented as a fan.

As shown in fig. 3, the lithium ion battery pack apparatus further includes a ventilator control unit 14, wherein the ventilator control unit 14 is electrically connected to the temperature-sensitive sensor unit 31, the temperature sensor unit 31 is configured to monitor the temperature of the battery cavity 11 and send a temperature monitoring value to the ventilator control unit 14, and the ventilator control unit 14 controls the rotation speed of the ventilator 13 corresponding to the ventilator 14 control unit according to the temperature detection value.

Furthermore, a plurality of temperature sensor units 31 are connected in parallel, wherein the temperature sensor units 31 are implemented as NTC resistors.

In an embodiment of the present invention, the plurality of battery packs 20 are connected in series or in parallel, and the battery packs 20 are detachably mounted in the battery box.

It will be understood by those skilled in the art that the embodiments of the present invention as described above and shown in the drawings are given by way of example only and are not limiting of the present invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the embodiments without departing from the principles, embodiments of the present invention may have any deformation or modification.

Claims

1. The utility model provides a lithium ion battery group device, includes the battery box and is held in the multiunit group battery group that sets up side by side of battery box to and the temperature sensor module of electricity connection multiunit group battery, its characterized in that, the temperature sensor module includes a plurality of temperature sensor units, wherein, each temperature sensor unit corresponds electricity respectively and connects in the group battery for measure the ambient temperature that each group battery was located respectively.

2. The lithium ion battery pack assembly of claim 1, wherein the battery housing is divided into a plurality of battery cavities by partitions for accommodating the battery packs, and wherein the temperature sensor units are respectively mounted in the battery cavities.

3. The lithium ion battery pack assembly of claim 2, wherein a temperature regulating tube is disposed at the top or bottom of the battery cavity, the temperature regulating tube connects the plurality of battery cavities, and the heat of the battery cavities is transferred from the battery cavity with higher temperature to the battery cavity with lower temperature through the temperature regulating tube.

4. The lithium ion battery pack assembly of claim 3, wherein the orifice of the temperature-regulating tube is oriented toward the battery cavity.

5. The lithium ion battery pack assembly of claim 3, wherein the temperature regulating tube is a Laval tube.

6. The lithium ion battery pack assembly of claim 4, wherein the opening of the temperature adjusting tube is provided with a ventilation device for accelerating the temperature transmission in the battery cavity corresponding to the ventilation device.

7. The lithium ion battery pack apparatus according to claim 6, further comprising a ventilator control unit, wherein the ventilator control unit is electrically connected to the temperature sensor unit, the temperature sensor unit is configured to monitor the temperature of the battery cavity and send the temperature to the ventilator control unit, and the ventilator control unit controls the rotational speed of the ventilator corresponding to the ventilator control unit according to the temperature.

8. The lithium ion battery pack assembly of claim 7, wherein a plurality of temperature sensor cells are connected in parallel, wherein the temperature sensor cells are implemented as NTC resistors.

9. The lithium ion battery pack assembly of claim 1, wherein a plurality of said battery packs are connected in series or in parallel, and each of said battery packs comprises a plurality of cells connected in series or in parallel.

10. The lithium ion battery pack assembly of claim 1, wherein the battery pack is removably mounted to the battery housing.