CN217881664U

CN217881664U - Ventilation cooling battery package

Info

Publication number: CN217881664U
Application number: CN202222267948.6U
Authority: CN
Inventors: 杨朝辉; 杨宇辉; 唐进科
Original assignee: Wuxi Longmax Technology Co ltd
Current assignee: Wuxi Longmax Technology Co ltd
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2022-11-22
Anticipated expiration: 2032-08-26

Abstract

The utility model relates to a ventilation and heat dissipation battery pack, which comprises a shell and a plurality of battery cells arranged in the shell, wherein the positive and negative electrodes of the battery cells are connected in sequence through a connecting row; the method is characterized in that: the battery pack is also provided with a ventilation and heat dissipation device; the ventilation and heat dissipation device comprises an air inlet fan, a rear air exhaust fan, a thermistor and an intelligent controller, wherein ventilation holes are formed in a front panel and a rear panel of the shell, the air inlet fan and the rear air exhaust fan are respectively installed on the inner side surfaces of the front panel and the rear panel, the thermistor is installed on the connecting row, the air inlet fan, the rear air exhaust fan and the thermistor are respectively connected with the intelligent controller, the thermistor detects the temperature of the battery cell electrode in real time and sends the temperature to the intelligent controller, and the intelligent controller controls the operation of the air inlet fan and the rear air exhaust fan according to the monitored temperature information. The utility model discloses simple structure, reasonable in design can keep the electric core stable performance in the battery package, prolong the life of battery package.

Description

Ventilation cooling battery package

Technical Field

The utility model relates to an energy storage system's basic unit battery package, specifically speaking are ventilation cooling battery package.

Background

The working temperature of the battery cell is between 0 and 55 ℃, and the optimal storage temperature is 25 +/-2 ℃. The working temperature of standard charging and discharging, maximum continuous current charging and discharging and pulse charging and discharging of the battery core is 25 +/-2 ℃. The performance of the battery cell can be reduced at high temperature and low temperature, and the service life is shortened. According to the temperature technical parameters of the battery cell, the battery cell is required to be kept to work under the appropriate temperature environment of 20-35 ℃. In the process of charging and discharging the battery cell, the anode and cathode connection bar resistance and the internal resistance of the battery cell generate heat.

The battery pack on the market at present installs the electric core in the metal box body. And manufacturing a battery cell frame inside the battery pack to fix the battery cell. When the cells are arranged in the cell frame, the cells are close to each other, and a gap of 1mm at most is reserved. The shell of the electric core frame is sealed, the air flow between the electric cores is reduced, the heat generated by the electric cores is naturally convected and dissipated by micro air, the temperature of the electric cores is quickly raised, and the heat dissipation time is long. And a metal frame is arranged around the periphery of the battery cell frame to fix the battery pack. The battery pack shell is generally made of metal, radiation heat dissipation is carried out by means of the heat conductivity of the metal of the shell, and the heat dissipation effect is not ideal.

According to the theoretical analysis of the battery pack heat mold, heat is concentrated in the middle area of the battery pack. Inside the battery package, the different temperature regions form air convection, rely on the good heat conductivity of metal to dispel the heat. However, forced air convection does not exist in the conventional battery pack, the temperature of a local high-temperature part is slowly reduced, and even the temperature is continuously increased, so that the temperature of the whole battery pack is increased, and the performance and the service life of the battery core are influenced.

Disclosure of Invention

An object of the utility model is to overcome the not enough of existence among the prior art, provide a ventilation cooling battery package, its simple structure, reasonable in design can keep the electric core stable performance in the battery package, prolong the life of battery package.

According to the utility model provides a technical scheme: a ventilation and heat dissipation battery pack comprises a shell and a plurality of battery cells arranged in the shell, wherein the positive electrode and the negative electrode of the battery cells are sequentially connected through a connecting row; the method is characterized in that: the battery pack is also provided with a ventilation and heat dissipation device; the ventilation and heat dissipation device comprises an air inlet fan, a rear air exhaust fan, a thermistor and an intelligent controller, wherein ventilation holes are formed in a front panel and a rear panel of the shell, the air inlet fan and the rear air exhaust fan are respectively installed on the inner side surfaces of the front panel and the rear panel, the thermistor is installed on the connecting row, the air inlet fan, the rear air exhaust fan and the thermistor are respectively connected with the intelligent controller, the thermistor detects the temperature of the battery cell electrode in real time and sends the temperature to the intelligent controller, and the intelligent controller controls the operation of the air inlet fan and the rear air exhaust fan according to the monitored temperature information.

As a further improvement, the ventilation and heat dissipation device further comprises a heat dissipation plate, the heat dissipation plate is arranged above the electric core, and the surface of the heat dissipation plate is provided with heat dissipation fins moving forward and backward.

As a further improvement of the utility model, every all be provided with two kinds of thermistors on the run-on, the thermistor passes through the OT copper terminal fixed.

As a further improvement of the utility model, the models of the two thermistors are 3435 and 3950 respectively.

As a further improvement of the utility model, the ventilation sectional area of the ventilation hole is in a form of big end up.

As a further improvement, the utility model discloses a keep 2cm clearance between the wide face of the adjacent electric core in the shell, keep 1 cm's clearance between the leptoprosopy.

As a further improvement, the positions of the ventilation holes on the front panel and the rear panel correspond to the positions of the gaps between the wide surfaces of the battery cells.

As a further improvement of the utility model, the ventilation hole is T-shaped, and the width of the vertical hole part of the ventilation hole is not less than 2cm.

As a further improvement of the present invention, the bottom of the housing is designed in a lattice shape.

Compared with the prior art, the utility model, have following advantage:

the utility model discloses an install fan, the back fan of airing exhaust, thermistor and intelligent control ware before additional on the battery package, constitute one set of ventilation cooling device from this, can inside temperature of automatic monitoring and ventilation cooling to control the temperature of battery package, guarantee that the temperature of battery package keeps the life of electric core stable performance, extension battery package at reasonable within range.

Drawings

Fig. 1 is a front view for showing an internal structure of a battery pack according to an embodiment of the present invention.

Fig. 2 is a top view for showing the internal structure of the battery pack according to the embodiment of the present invention.

Fig. 3 is a top view for showing the layout and connection relationship of the battery cells in the embodiment of the present invention.

Fig. 4 is a schematic view illustrating the opening condition of the vent hole in the embodiment of the present invention.

Fig. 5 is a schematic view illustrating the installation of the thermistors on the connecting row according to the embodiment of the present invention.

Description of the reference numerals: the solar cell comprises a shell 1, a front panel 1a, a rear panel 1b, a vent hole 1c, a battery cell 2, a connecting row 3, a front air inlet fan 4, a rear air outlet fan 5, a thermistor 6 and a heat dissipation plate 7.

Detailed Description

The invention is further described with reference to the following specific drawings and examples.

As shown in fig. 1 to 5, the embodiment discloses a ventilation and heat dissipation battery pack, which mainly comprises a housing 1, a battery cell 2, a connection row 3, a front air fan 4, a rear air fan 5, a thermistor 6, a heat dissipation plate 7, an intelligent controller and other parts.

As shown in fig. 1 to fig. 3, the battery cells 2 are installed inside the casing 1, and the positive electrode and the negative electrode of a plurality of battery cells 2 are sequentially connected through the connecting bar 3; the front panel 1a and the rear panel 1b of the shell 1 are both provided with vent holes 1c, the front air inlet fan 4 and the rear air outlet fan 5 are respectively arranged on the inner side surfaces of the front panel 1a and the rear panel 1b, the thermistors 6 are arranged on the connecting rows 3, each connecting row 3 is provided with 3435 and 3950 thermistors 6, and the two thermistors 6 are fixed through OT copper terminals; the front air inlet fan 4, the rear air exhaust fan 5 and the thermistor 6 are respectively connected with the intelligent controller, the thermistor 6 detects the temperature of the electrode of the battery cell 2 in real time and sends the temperature to the intelligent controller, and the intelligent controller controls the front air inlet fan 4 and the rear air exhaust fan 5 to operate according to the monitored temperature information; a set of ventilation and heat dissipation device is formed by the front air inlet fan 4, the rear air exhaust fan 5, the thermistor 6 and the intelligent controller, the temperature of the battery pack is controlled, the temperature of the battery pack is guaranteed to be within a reasonable range, the performance of the battery core 2 is kept stable, and the service life of the battery pack is prolonged.

When the intelligent air conditioner works, the intelligent controller monitors the temperature of the battery cell 2 through the thermistor 6 all the time, when the temperature of the battery cell 2 is higher than 30 ℃, the intelligent controller controls the front air inlet fan 4 to be started, the front air inlet fan 4 sucks external air, and air convection is enhanced in a mode of front air inlet and rear air outlet (shown by arrows in fig. 2) to take away heat; when the temperature of the battery core 2 is higher than 40 ℃, the front air inlet fan 4 is kept working, and the rear air exhaust fan 5 is started to further enhance air convection to take away heat; when the temperature of the battery core 2 is higher than 45 ℃, the front air inlet fan 4 and the rear air outlet fan 5 are kept to work simultaneously, the air convection is enhanced to take away heat, and the intelligent controller simultaneously sends out a high-temperature alarm signal; when the temperature of the battery core 2 is higher than 50 ℃, the front air inlet fan 4 and the rear air outlet fan 5 are kept to work simultaneously, air convection is enhanced to take away heat, the intelligent controller simultaneously sends out an over-temperature alarm signal and forcibly stops the machine, and the front air inlet fan 4 and the rear air outlet fan 5 continue to work until the temperature is reduced to below 35 ℃. The utility model discloses take 2 electrodes of electricity core to highest temperature and control, all temperatures are got the average value simultaneously and are compared, find out the region that the temperature is the highest. In order to determine the correctness of the electrode temperature of the battery cells 2, on one hand, the temperature of one battery cell 2 electrode is compared with the temperature of other surrounding electrodes, and on the other hand, the temperatures of the two thermistors 6 are compared to ensure that the thermistors 6 work normally.

According to the theoretical analysis of the battery pack heat mold, the heat is concentrated in the middle area of the battery pack, the parts generating heat are mainly the inside of the battery core 2 and the positive and negative electrodes of the battery core 2, and particularly the heat generated by the connecting row 3 and the positive and negative electrode connecting parts of the battery core 2 is the largest. Therefore, the utility model reasonably designs the arrangement mode of the electric cores 2 and the structure of the vent holes 1c, and particularly as shown in fig. 1-4, in the illustrated embodiment, a 2cm gap is kept between the wide surfaces of the adjacent electric cores 2 in the shell 1, and a 1cm gap is kept between the narrow surfaces; the positions of the vent holes 1c on the front panel 1a and the rear panel 1b correspond to the positions of gaps between the wide surfaces of the battery cells 2; the vent hole 1c is T-shaped, and the width of the vertical hole part of the vent hole 1c is larger than 2cm. With the arrangement, the air convection performance in the battery pack is improved, and the ventilation sectional area of the ventilation hole 1c is large at the top and small at the bottom, so that the heat dissipation at the top can be enhanced.

As shown in fig. 1 and fig. 2, in order to further promote top heat-dissipating ability, ventilation cooling device in this embodiment still includes heating panel 7, heating panel 7 sets up in the top of electric core 2, and the radiating fin 7a that moves towards around heating panel 7 surface is equipped with, works as like this the utility model discloses when the air convection is strengthened to the mode of air-out behind the former air inlet, heating panel 7 is favorable to further promoting heat dispersion. In addition, the bottom of the housing 1 is preferably designed into a grid shape, which is also beneficial to improving the heat dissipation performance.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Within the scope of the technical idea of the present invention, various modifications and alterations can be made, and any person skilled in the art can make modifications, amendments or equivalent replacements according to the above description, all belonging to the protection scope of the present invention.

Claims

1. A ventilation and heat dissipation battery pack comprises a shell (1) and a plurality of battery cores (2) arranged in the shell, wherein the positive pole and the negative pole of the battery cores (2) are sequentially connected through a connecting bar (3); the method is characterized in that: the battery pack is also provided with a ventilation and heat dissipation device; the ventilation and heat dissipation device comprises a front air inlet fan (4), a rear air exhaust fan (5), a thermistor (6) and an intelligent controller, wherein air vents (1 c) are formed in a front panel (1 a) and a rear panel (1 b) of the shell (1), the front air inlet fan (4) and the rear air exhaust fan (5) are respectively installed on the inner side surfaces of the front panel (1 a) and the rear panel (1 b), the thermistor (6) is installed on the connecting row (3), the front air inlet fan (4), the rear air exhaust fan (5) and the thermistor (6) are respectively connected with the intelligent controller, the thermistor (6) checks the temperature of an electrode of the battery core (2) in real time and sends the temperature to the intelligent controller, and the intelligent controller controls the front air inlet fan (4) and the rear air exhaust fan (5) to operate according to monitored temperature information.

2. The ventilation and heat dissipation battery pack of claim 1, wherein: the ventilation and heat dissipation device further comprises a heat dissipation plate (7), the heat dissipation plate (7) is arranged above the battery cell (2), and heat dissipation fins (7 a) moving forwards and backwards are arranged on the surface of the heat dissipation plate (7).

3. The ventilated heat-dissipating battery pack according to claim 1, wherein: two thermistors (6) are arranged on each connecting row (3), and the thermistors (6) are fixed through OT copper terminals.

4. The ventilated heat-dissipating battery pack according to claim 2, wherein: the models of the two thermistors (6) are 3435 and 3950 respectively.

5. The ventilated heat-dissipating battery pack according to claim 1, wherein: the ventilation cross-sectional area of the ventilation hole (1 c) is in a form of a large top and a small bottom.

6. The ventilated heat-dissipating battery pack according to claim 1, wherein: a2 cm gap is kept between the wide surfaces of the adjacent battery cores (2) in the shell (1), and a 1cm gap is kept between the narrow surfaces.

7. The ventilation and heat dissipation battery pack of claim 6, wherein: the positions of the ventilation holes (1 c) on the front panel (1 a) and the rear panel (1 b) correspond to the positions of gaps between the wide surfaces of the battery cores (2).

8. The ventilated heat-dissipating battery pack according to claim 6, wherein: the vent hole (1 c) is T-shaped, and the width of a vertical hole part of the vent hole (1 c) is not less than 2cm.

9. The ventilated heat-dissipating battery pack according to claim 1, wherein: the bottom of the shell (1) is designed into a grid shape.