CN217239560U

CN217239560U - Battery pack with passive dehumidification and active humidity control functions

Info

Publication number: CN217239560U
Application number: CN202123388571.1U
Authority: CN
Inventors: 郭建成; 吉盛; 杨继承
Original assignee: Jiangsu Chunlan Clean Energy Academy Co ltd
Current assignee: Jiangsu Chunlan Clean Energy Academy Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-19
Anticipated expiration: 2031-12-30

Abstract

The utility model discloses a battery package with wet function of passive dehumidification and initiative accuse, battery package is inside to be equipped with battery module, cooling tube 6 arranges battery module's bottom. The battery pack is internally provided with a moisture absorption area and a moisture control structure, the moisture absorption area and the moisture control structure are used for reducing moisture in the battery pack, the battery pack is changed into a passive dehumidification and active moisture control measure, and the control on the internal humidity of the battery pack is realized, so that the reliability of the system is ensured, and the influence of the moisture on the use safety of the battery pack is reduced.

Description

Battery pack with passive dehumidification and active humidity control functions

Technical Field

The utility model relates to a battery package with wet function of passive dehumidification and initiative accuse.

Background

At present, the lithium ion battery generally has the best charge-discharge performance and the best service life within the range of 20-40 ℃. And a heat management system is used for maintaining the battery pack to work in the optimal working range in the market. The heat management system mode mainly comprises active air-cooled air heating schemes, liquid-cooled liquid heating schemes and the like. If adopt the liquid cooling scheme, arrange the cooling tube of liquid cooling inside inclosed battery box, then can appear high temperature vapor condensation's phenomenon in battery package inside, lead to electrical component inefficacy, battery insulation to reduce. The main reasons for high temperature water vapor condensation are as follows: 1) after the water cooling is started, the temperature difference between the shell of the battery pack and the air in the battery pack is large, and when the temperature and the humidity of the air in the battery pack meet the requirement of water vapor condensation, water vapor condensation can be generated; 2) when the battery is not used, the air inside the battery pack is hot, and the air outside the battery pack drops at a very high speed, condensation can also be generated on the cover and the side wall of the battery pack. 3) When the battery is in a cold environment for a long time, the battery rises rapidly due to use, and condensation may also occur on the top cover of the battery and the side wall of the case.

Disclosure of Invention

The utility model relates to a battery package with wet function of passive dehumidification and initiative accuse, it can minimize the inside vapor condensation of battery package, reduces electrical component probability of failure, reduces the safety risk.

The utility model adopts the following technical scheme: the battery pack with the functions of passive dehumidification and active humidity control comprises a battery box, wherein a top cover is arranged at the top of the battery box, the inner cavity of the battery box is divided into an electrical cavity and a battery cavity, a heat insulation filling material layer I is arranged between the electrical cavity and the battery cavity, a cooling pipeline is arranged at the bottom of the inner cavity of the battery box and is positioned at the bottom of the battery cavity and the electrical cavity, a heat insulation filling material layer II is arranged at the top of the battery cavity, a plurality of battery modules are arranged inside the battery cavity, the heat insulation filling material layer I is positioned on the side surface of each battery module, the heat insulation filling material layer II is positioned at the top of each battery module, active humidity control monitoring equipment is arranged at the upper part of the electrical cavity and is connected with a cooling unit outside the battery pack through an interface, a moisture absorption material layer is arranged at the lower part of the electrical cavity, air holes are formed in the battery box body and are positioned at one side of the electrical cavity, the vent holes are provided with vent valves.

The electric cavity and the battery cavity are separated by a metal baffle, and the metal baffle is made of high-strength steel.

The monitoring device is set as a temperature and humidity sensor and a monitoring module thereof, the temperature and humidity sensor is connected with the monitoring module, and the monitoring module is connected with the alarm and a cooling unit with a heating function outside the battery pack through a wire harness interface.

And a wire harness interface of the monitoring equipment is vertical to the gravity direction, and the wire harness enters the wire harness interface of the detection equipment after being bent.

The ventilation valve is a one-way valve.

And the heat insulation filling material layer I and the heat insulation filling material layer II are both arranged to be foam material layers.

The top cover of the battery box is a heat insulation top cover which is made of RTM fiber composite materials.

The moisture absorption material layer is a calcium chloride layer.

The utility model discloses following beneficial effect has: the utility model discloses the battery package adopts the passive dehumidification function, realizes detecting electric chamber temperature and humidity condition through temperature and humidity sensor to the control of battery package inside temperature, humidity, when humidity and temperature satisfy the steam condensation requirement condition, the coolant temperature of control battery package external cooling unit output reduces the difference in temperature of battery package casing and electric intracavity portion, reduces the inside air condensation of battery package and produces the probability, furtherly, when humidity exceedes the limit value, reports to the police, reminds the maintenance. Therefore, the probability of air condensation is greatly reduced, the reliability of the system is improved, and the risk of failure of the electrical assembly is reduced.

The utility model discloses also adopt the function of initiative dehumidification, include:

1. the top cover of the battery box is set to be a heat insulation top cover (made of RTM fiber composite materials), so that the probability of hot air condensation inside the battery caused by external environment change can be reduced;

2. the heat insulation filling material layer I is located on the side face of the battery module, the heat insulation filling material layer II is located on the top of the battery module, the heat insulation filling material layer I and the heat insulation filling material layer II are both arranged to be foam material layers, so that the air content of a battery cavity can be reduced, the probability of condensation on the surface of a battery is reduced, meanwhile, the heat insulation filling material layer I is located between the battery cavity and an electrical cavity, the temperature influence of the temperature change of the battery on the electrical cavity can be reduced, the temperature difference of air inside the electrical cavity shell and the battery pack is reduced when an external cooling unit works, and the probability of condensation is reduced;

3. the battery box body is provided with the air holes, the air holes are positioned on one side of the electric cavity, the air holes are provided with the air vent valves, and the air vent valves are one-way valves, so that the external wet air can be reduced from entering the battery pack while the internal and external pressures of the battery pack are balanced.

4. The lower part of the electric cavity is provided with the moisture absorption material layer, so that moisture in air can be absorbed by the moisture absorption material, and the probability of air condensation is reduced.

5. The utility model discloses the pencil interface of supervisory equipment (9) is perpendicular with the direction of gravity, and the pencil gets into check out test set's pencil interface after bending, can reduce like this that the moisture gets into inside the supervisory equipment along the direction of gravity, influences supervisory equipment reliable work.

6. The utility model discloses through the above-mentioned wet measure of adoption passive dehumidification, initiative accuse, realized the control to the inside humidity of battery package to ensure the reliability of system, reduce the influence of moisture to battery package safe in utilization.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In fig. 1, the present invention provides a battery pack with passive dehumidification and active humidity control functions, which comprises a battery box 1, a top cover 2 is disposed on the top of the battery box 1, the top cover 2 of the battery box is a thermal insulation top cover made of RTM fiber composite material, the inner cavity of the battery box 1 is divided into an electrical cavity 3 and a battery cavity 4, the electrical cavity 3 and the battery cavity 4 are separated by a metal baffle 13, the metal baffle 13 is made of high-strength steel, a thermal insulation filling material layer i 5 is disposed between the electrical cavity 3 and the battery cavity 4, a cooling pipe 6 is disposed at the bottom of the inner cavity of the battery box 1, the cooling pipe 6 is disposed at the bottom of the battery cavity 4 and the electrical cavity 3, a thermal insulation filling material layer ii 7 is disposed at the top of the battery cavity 4, a plurality of battery modules 8 are disposed inside the battery cavity 4 of this embodiment, the heat insulation filling material layer I5 is positioned on the side surface of the battery module 8, the heat insulation filling material layer II 7 is positioned on the top of the battery module, the heat insulation filling material layer I5 and the heat insulation filling material layer II 7 are both arranged to be foam material layers, the upper part of the electric cavity 3 is provided with a monitoring device 9 for active moisture control, the monitoring device 9 is a temperature and humidity sensor, the monitoring device is a temperature and humidity sensor and a monitoring module thereof, the temperature and humidity sensor is connected with the monitoring module, the monitoring module is connected with an alarm and a cooling unit with a heating function outside the battery pack through a wiring harness interface 14, the lower part of the electric cavity 3 is provided with a moisture absorption material layer 10, the moisture absorption material layer 10 is a calcium chloride layer with high moisture absorption capacity, the battery box 1 is provided with a vent hole 11 on the box body, the vent hole 11 is positioned at one side of the electric cavity 3, a vent valve 12 is arranged on the vent hole 11, and the vent valve 12 is a one-way valve.

The utility model discloses a use does: the temperature and humidity sensor is used for monitoring and acquiring real-time temperature and humidity data inside the battery pack and shell temperature of an electrical cavity, meanwhile, the acquired real-time temperature and humidity data are compared with a moisture condensation condition to determine whether an active dehumidification function is started, when the humidity is greater than a limit value, the humidity and temperature sensor transmits a signal to the alarm to give an alarm, when the humidity is less than the limit value, the real-time temperature and humidity data are compared with the moisture condensation condition, when the temperature and humidity data meet the moisture condensation condition, the humidity and temperature sensor transmits the signal to the cooling unit outside the battery pack, and the cooling unit changes the temperature of the shell of the battery pack according to information of the battery pack, so that the generation probability of condensed air inside the battery pack is reduced.

Claims

1. The battery pack with the functions of passive dehumidification and active humidity control is characterized by comprising a battery box (1), a top cover (2) is arranged at the top of the battery box (1), an inner cavity of the battery box (1) is divided into an electrical cavity (3) and a battery cavity (4), a heat insulation filling material layer I (5) is arranged between the electrical cavity (3) and the battery cavity (4), a cooling pipeline (6) is arranged at the bottom of the inner cavity of the battery box (1), the cooling pipeline (6) is positioned at the bottoms of the battery cavity (4) and the electrical cavity (3), a heat insulation filling material layer II (7) is arranged at the top of the battery cavity (4), a plurality of battery modules (8) are arranged in the battery cavity (4), the heat insulation filling material layer I (5) is positioned on the side face of each battery module (8), the heat insulation filling material layer II (7) is positioned at the top of each battery module, monitoring equipment (9) for active humidity control is arranged at the upper portion of each electrical cavity (3), the monitoring device (9) is connected with a cooling unit outside the battery pack through a wiring harness interface (14), a moisture absorption material layer (10) is arranged on the lower portion of the electric cavity (3), air holes (11) are formed in the box body of the battery box (1), the air holes (11) are located on one side of the electric cavity (3), and air vent valves (12) are arranged on the air holes (11).

2. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 1, wherein the electrical cavity (3) is separated from the battery cavity (4) by a metal baffle (13), and the metal baffle (13) is made of high-strength steel.

3. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 1, wherein the monitoring device (9) is configured as a temperature and humidity sensor and a monitoring module thereof, the temperature and humidity sensor is connected with the monitoring module, and the monitoring module is connected with the alarm and a cooling unit with a heating function outside the battery pack through a wire harness interface (14).

4. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 3, wherein a wire harness interface of the monitoring device (9) is perpendicular to the gravity direction, and the wire harness enters the wire harness interface of the detection device after being bent.

5. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 1, wherein the vent valve (12) is configured as a one-way valve.

6. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 1, wherein the thermal insulation filling material layer I (5) and the thermal insulation filling material layer II (7) are both provided as foam material layers.

7. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 1, wherein the top cover (2) of the battery box is a heat insulation top cover made of an RTM fiber composite material.

8. The battery pack with the passive dehumidification and active humidity control functions as claimed in claim 1, wherein the moisture-absorbing material layer (10) is a calcium chloride layer.