Power battery pack and humidity verification device thereof

Abstract

The utility model provides a power battery pack and a humidity verification device thereof, and relates to the technical field of power batteries. The ventilation valve is arranged on the battery box body; the moisture absorption part is arranged in the battery box body; the air flow accelerating component is arranged in the battery box body and is used for accelerating air flow in the battery box body, so that condensation in the battery box body is evaporated and water vapor is formed; the interior and the exterior of the battery box body are respectively provided with at least one temperature and humidity detection component; the control unit is electrically connected with the air flow acceleration component and the temperature and humidity detection component, and the control unit is used for receiving a signal detected by the temperature and humidity detection component and sending a control instruction to the air flow acceleration component according to the detected signal; and the condensation phenomenon in the battery box body when the external temperature and humidity change quickly is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and more specifically, relates to a power battery pack and a humidity verification device thereof. Background Art

[0002] Power batteries are the core part of new energy. During long-term use, the air pressure in the battery box will change with the change in altitude. Therefore, the battery pack is equipped with a waterproof breathable valve to balance the pressure difference between the inside and outside. However, in the process of balancing the pressure difference between the inside and outside, moisture will enter the battery box. When high temperature and high humidity occur and there is too much moisture in the battery box, the moisture will condense inside the battery box before being absorbed by the hygroscopic component, forming condensation. Condensation will cause insulation to decrease, and then cause safety accidents. Utility Model Content

[0003] The purpose of the utility model is to provide a power battery pack and its humidity verification device in view of the deficiencies in the existing technology, so as to solve the problem proposed in the above background technology that when high temperature and high humidity alternation occurs and there is too much moisture in the battery case, the moisture will condense inside the battery case before being absorbed by the hygroscopic component, forming condensation. The condensation will cause the insulation to decrease, and then cause a safety accident.

[0004] In order to achieve the above object, the utility model provides a power battery pack, which includes:

[0005] Battery box;

[0006] A vent valve, the vent valve being arranged on the battery box;

[0007] A moisture absorbing member, the moisture absorbing member is arranged inside the battery box;

[0008] an air flow acceleration component, the air flow acceleration component being arranged inside the battery case and used to accelerate the air flow inside the battery case so as to evaporate the condensation inside the battery case and form water vapor;

[0009] A plurality of temperature and humidity detection components, at least one of which is disposed inside and outside the battery box;

[0010] A control unit is electrically connected to the air flow acceleration component and the temperature and humidity detection component, and is used to receive a signal detected by the temperature and humidity detection component and send a control instruction to the air flow acceleration component according to the detected signal.

[0011] Preferably, the air inlet pressure of the air valve is set to 3±1 Kpa, and the air outlet pressure of the air valve is set to 1±0.8 Kpa.

[0012] Preferably, the bursting pressure of the air valve is set to 7±2 Kpa.

[0013] Preferably, the air valve is a valve-type waterproof air valve.

[0014] Preferably, the air flow acceleration component is a cold evaporative air flow accelerator.

[0015] Preferably, the air flow acceleration component is a hot air flow accelerator.

[0016] Preferably, the hygroscopic member is aluminum oxide, a desiccant or a hygroscopic sheet.

[0017] Preferably, the temperature and humidity detection component is a temperature and humidity detector.

[0018] A power battery pack humidity verification device is used to verify the humidity in the power battery pack, the verification device comprising:

[0019] A filler, the filler is used to simulate a battery module in an actual battery box, and the filler is used to be arranged in the battery box to replace the battery module in the battery box;

[0020] An alternating damp heat test chamber, the interior of which is used to simulate a temperature and humidity environment, and the interior of which is used to place a power battery pack;

[0021] The display end is used to be electrically connected to the control unit, and the display end is used to display the humidity value in the battery box.

[0022] Preferably, the filler is a hydrophobic material filler.

[0023] The utility model provides a power battery pack and a humidity verification device thereof, which has the beneficial effects that: an air flow acceleration component of the battery pack is arranged inside a battery box, and at least one temperature and humidity detection component is respectively arranged inside and outside the battery box, a hygroscopic component is used to absorb water vapor in the battery box, when the outside humidity is large and the temperature changes rapidly, the temperature and humidity detection component arranged outside the battery box will send a signal to a control unit, and the control unit will turn on the air flow acceleration component at this time to speed up the flow of air in the battery box, and can use the principle of air flow evaporation to evaporate small water droplets that have condensed on the surface of the battery pack box to become water vapor, and promote the hygroscopic component to absorb moisture in the battery box, thereby preventing condensation from forming in the battery box when the outside temperature and humidity change rapidly, and when the temperature and humidity detection component outside the battery box detects that the humidity in the battery box enters a balanced state or is continuously controlled within a certain range, it will send a signal to the control unit, and the control unit will turn off the air flow acceleration component at this time.

[0024] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0026] Figure 1 A schematic diagram of an exploded structure of a power battery pack according to an embodiment of the utility model is shown;

[0027] Figure 2 A schematic diagram of the explosion structure of a power battery pack humidity verification device according to an embodiment of the utility model is shown.

[0028] Description of reference numerals:

[0029] 1. Battery box; 2. Ventilation valve; 3. Hygroscopic component; 4. Air flow acceleration component; 5. Temperature and humidity detection component; 6. Filler; 7. Alternating heat and humidity test chamber. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] like Figure 1 As shown, the utility model provides a power battery pack, which includes:

[0032] Battery box 1;

[0033] A vent valve 2, which is arranged on the battery box 1;

[0034] A moisture absorbing member 3, which is arranged inside the battery box 1;

[0035] The air flow acceleration component 4 is arranged inside the battery box 1 and is used to accelerate the air flow inside the battery box 1 to evaporate the condensation inside the battery box 1 and form water vapor;

[0036] Multiple temperature and humidity detection components 5, at least one temperature and humidity detection component 5 is respectively provided inside and outside the battery box 1;

[0037] The control unit is electrically connected to the air flow acceleration component 4 and the temperature and humidity detection component 5. The control unit is used to receive the signal detected by the temperature and humidity detection component 5 and send a control instruction to the air flow acceleration component 4 according to the detected signal.

[0038] Specifically, in order to solve the problem that when high temperature and high humidity alternation occurs and there is too much moisture in the battery case, the moisture will condense inside the battery case before being absorbed by the moisture absorbent, forming condensation, and the condensation will cause insulation to decrease, thereby causing safety accidents, the utility model provides a power battery pack, the air flow acceleration component of the battery pack is arranged inside the battery case 1, and at least one temperature and humidity detection component 5 is arranged inside and outside the battery case 1 respectively, the moisture absorbent 3 is used to absorb water vapor in the battery case 1, when the external humidity is high and the temperature changes rapidly, the temperature and humidity detection component 5 arranged outside the battery case 1 will A signal is sent to the control unit, which will then turn on the air flow acceleration component 4 to speed up the flow of air in the battery case 1. The small water droplets that have condensed on the surface of the battery case 1 can be evaporated into water vapor using the principle of air flow evaporation, thereby promoting the moisture absorbent 3 to absorb the moisture in the battery case 1, thereby preventing condensation from forming in the battery case 1 when the external temperature and humidity change rapidly. When the temperature and humidity detection component 5 outside the battery case 1 detects that the humidity in the battery case 1 enters a balanced state or is continuously controlled within a certain range, a signal is sent to the control unit, which will then turn off the air flow acceleration component 4.

[0039] Preferably, the air inlet pressure of the air valve 2 is set to 3±1 Kpa, and the air outlet pressure of the air valve 2 is set to 1±0.8 Kpa.

[0040] Specifically, in order to solve the problem that when the pressure difference between the inside and outside of the battery box 1 changes greatly during the process of balancing the internal and external air pressure difference, the air valve 2 is frequently opened, and too much moisture enters the battery box 1, causing the hygroscopic component 3 to easily approach a saturated state, the utility model provides a valve-type waterproof air valve. The model of the valve-type waterproof air valve is PBA7K-50GTP-8T. The air intake pressure is set to 3±1Kpa, the exhaust pressure is 1±0.8Kpa, and the bursting pressure is set to 7±2Kpa. The characteristics of high-pressure intake and low-pressure exhaust can be achieved. When the pressure difference between the inside and outside of the battery box 1 changes greatly, it can effectively prevent moisture from entering the battery box 1 when it is frequently opened, and avoid the hygroscopic component 3 approaching a saturated state, which leads to the occurrence of condensation.

[0041] The battery pack restricts water vapor entering the battery box 1 through a valve-type waterproof breathable valve to prevent the moisture absorbent 3 from easily approaching a saturated state. At the same time, an air flow acceleration component 4 is used for dehumidification to prevent condensation from forming in the battery box 1 when the external temperature and humidity change rapidly.

[0042] Preferably, the air flow acceleration component 4 is a cold evaporative air flow accelerator.

[0043] Specifically, the flow of air around the condensation is accelerated through the principle of cold evaporation, and the condensation condensed in the battery box 1 is converted into water vapor, which promotes the moisture absorbent 3 to absorb the moisture in the battery box 1.

[0044] Preferably, the air flow acceleration component 4 is a hot air flow accelerator.

[0045] Specifically, according to environmental requirements, a hot air flow accelerator can be used to accelerate the process of condensation turning into water vapor by using a heating function, thereby reducing the condensation retained in the battery box 1.

[0046] Preferably, the moisture absorbing member 3 is aluminum oxide, a desiccant or a moisture absorbing sheet.

[0047] Specifically, alumina, desiccant or moisture absorbent sheet can be used to absorb moisture in the battery box 1 .

[0048] Preferably, the temperature and humidity detection component 5 is a temperature and humidity detector.

[0049] Specifically, at least one temperature and humidity detector is disposed inside the battery box 1 , and a probe of the temperature detector is installed near the upper cover of the battery box 1 , and the rest can be installed outside the battery box 1 .

[0050] like Figure 2 As shown, a power battery pack humidity verification device is used to verify the humidity in the power battery pack, and the verification device includes:

[0051] A filler 6, which is used to simulate a battery module in an actual battery box 1, and is used to be arranged in the battery box 1 to replace the battery module in the battery box 1;

[0052] Alternating damp heat test box 7, the interior of the alternating damp heat test box 7 is used to simulate the temperature and humidity environment, and the interior of the alternating damp heat test box 7 is used to set the power battery pack;

[0053] The display end is used to be electrically connected to the control unit, and the display end is used to display the humidity value in the battery box 1.

[0054] Specifically, the shape of the filler 6 is not limited, and the remaining space after assembly with the battery box 1 is consistent with the net space in the battery box 1 actually used. The temperature and humidity detection component 5 can be transmitted to the control unit via a wireless network or mobile signal, and the control unit can be transmitted to the display end via a wireless network or mobile signal.

[0055] Preferably, the filler 6 is a hydrophobic material filler.

[0056] In summary, when the power battery pack humidity verification device of the present invention verifies the humidity in the battery pack, the verification steps are as follows:

[0057] S1: Verify the air tightness of the device: Install the valve-type waterproof breathable valve as required, and do a good job of sealing protection. Use the tooling to inflate from the breathable valve 2, maintain the pressure for one minute, and check the air leakage. If the air leakage meets the requirements, the seal is considered qualified;

[0058] S2: Perform constant and alternating tests: Place the battery pack to be verified in the alternating damp heat test chamber 7, adjust the humidity to 90% RH, and cycle the temperature according to the data in Table 1 below;

[0059]

[0060]

[0061] S3: Receive test data and analyze the results: Use the display terminal to receive the humidity values ​​inside and outside the battery box 1. When the humidity value inside the battery box 1 fluctuates repeatedly, the experiment continues. When the humidity value inside the battery box 1 enters a balanced state or is continuously controlled within 50% RH for more than 96 hours, the experiment is suspended.

[0062] S4: Stop the test and open the alternating humidity and heat test box 7 for verification: Open the alternating humidity and heat test box 7, measure the mass change of the hygroscopic component 3, and observe whether there is condensation on the inner wall of the battery case 1 and the surface of the filler 6 used to simulate the battery module. If the mass increase of the hygroscopic component 3 (the weight of the moisture absorbed by the hygroscopic component 3) is less than the weight of the hygroscopic component 3 when it does not absorb moisture, the hygroscopic component 3 is not in a saturated state and there is no condensation on the inner wall of the battery case 1 and the surface of the filler 6 used to simulate the battery module, it means that the humidity control scheme experiment of the power battery pack has passed.

[0063] After the humidity control scheme of the power battery pack has been verified, the water vapor entering the battery box 1 through the valve-type waterproof breathable valve is restricted to prevent the moisture absorbent 3 from easily approaching a saturated state. At the same time, the air flow acceleration component 4 is used for dehumidification, which can effectively prevent condensation from forming in the battery box 1 when the external temperature and humidity change rapidly.

[0064] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A power battery pack, characterized in that: The battery pack includes: Battery box; A vent valve, the vent valve being arranged on the battery box; A moisture absorbing member, the moisture absorbing member is arranged inside the battery box; an air flow acceleration component, the air flow acceleration component being arranged inside the battery case and used to accelerate the air flow inside the battery case so as to evaporate the condensation inside the battery case and form water vapor; A plurality of temperature and humidity detection components, at least one of which is disposed inside and outside the battery box; A control unit is electrically connected to the air flow acceleration component and the temperature and humidity detection component, and is used to receive a signal detected by the temperature and humidity detection component and send a control instruction to the air flow acceleration component according to the detected signal.

2. A power battery pack according to claim 1, characterized in that: The air inlet pressure of the air valve is set to 3±1Kpa, and the air outlet pressure of the air valve is set to 1±0.8Kpa.

3. A power battery pack according to claim 1, characterized in that: The bursting pressure of the air valve is set to 7±2Kpa.

4. A power battery pack according to claim 1, characterized in that: The air-permeable valve is a valve-type waterproof air-permeable valve.

5. The power battery pack according to claim 1, characterized in that: The air flow acceleration component is a cold evaporative air flow accelerator.

6. A power battery pack according to claim 1, characterized in that: The air flow acceleration component is a hot air flow accelerator.

7. A power battery pack according to claim 1, characterized in that: The moisture absorbing member is aluminum oxide, a desiccant or a moisture absorbing sheet.

8. The power battery pack according to claim 1, characterized in that: The temperature and humidity detection component is a temperature and humidity detector.

9. A power battery pack humidity verification device, used to verify the humidity in the power battery pack according to any one of claims 1 to 8, characterized in that: The verification device comprises: A filler, the filler is used to simulate a battery module in an actual battery box, and the filler is used to be arranged in the battery box to replace the battery module in the battery box; An alternating damp heat test chamber, the interior of which is used to simulate a temperature and humidity environment, and the interior of which is used to place a power battery pack; The display end is used to be electrically connected to the control unit, and the display end is used to display the humidity value in the battery box.

10. A power battery pack humidity verification device according to claim 9, characterized in that: The filler is made of a hydrophobic material.

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